CN109350021A - A multi-parameter wrist vital sign monitoring device and its low power consumption working method - Google Patents
- ️Tue Feb 19 2019
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- CN109350021A CN109350021A CN201811433295.6A CN201811433295A CN109350021A CN 109350021 A CN109350021 A CN 109350021A CN 201811433295 A CN201811433295 A CN 201811433295A CN 109350021 A CN109350021 A CN 109350021A Authority
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/0225—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/024—Measuring pulse rate or heart rate
- A61B5/02438—Measuring pulse rate or heart rate with portable devices, e.g. worn by the patient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/681—Wristwatch-type devices
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- Measuring And Recording Apparatus For Diagnosis (AREA)
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Abstract
The present invention discloses a kind of multi-parameter wrist life physical sign monitoring device, including blood oxygen heart rate acquisition module, blood pressure acquisition module, core processing module, power module, data transmission module；Low-power consumption working method: the whether intact wearing of judgment means, just start to work normally with having worn, otherwise low power supply is standby, device is able to achieve to detect and work automatically, one begins to detect with wearing, and after one-time detection is completed and transmits data, for device meeting automatic checking device either with or without stopping working, it's not true can be automatically into the mode of stopping working.The utility model has the advantages that reducing equipment power dissipation from the angle of system level design has the advantages of at low cost, effect is fast, significant effect, under the premise of not influencing equipment working performance, the distribution that chip core operating mode and resource are rationally controlled in whole equipment workflow, can satisfy the purpose of low power dissipation design.
Description
Technical field
The present invention relates to portable sign detection device technical fields, specifically, are related to a kind of multi-parameter wrist life entity Levy monitoring device and its low-power consumption working method.
Background technique
With the continuous development of electronic technology, wearable device has been to be concerned by more and more people and likes.Small in size, function Can strong, light wearable device while bring great convenience to people's lives, also just constantly towards high-performance, highly reliable Property, measurement accurately direction develop.While equipment performance various aspects are promoted, the following cost is the promotion of power consumption, if The shortening of standby working time, greatly reduces experience of the user for equipment.In the shadow of wearable device volume limited resource Under sound, can not the big battery of built-in capacity large volume, this becomes wearable device performance and taking into account for low power dissipation design urgently Problem to be solved.
When hardware design field reaches bottleneck, how to guarantee to enable equipment under the premise of not influencing equipment working performance Energy consumption reduce become problem.
Summary of the invention
For the problems of above-mentioned background, the invention proposes a kind of multi-parameter wrist life physical sign monitoring device and Its low-power consumption working method, equipment power dissipation is reduced from the angle of system level design that at low cost, effect is fast, effective Advantage rationally controls chip core running mould under the premise of not influencing equipment working performance in whole equipment workflow The distribution of formula and resource can satisfy the purpose of low power dissipation design.
In order to achieve the above objectives, the specific technical solution that the present invention uses is as follows:
A kind of multi-parameter wrist life physical sign monitoring device, including blood oxygen heart rate acquisition module, blood pressure acquisition module, core Processing module, power module, data transmission module, the output end of the blood oxygen heart rate acquisition module, blood pressure acquisition module it is defeated Outlet is separately connected the input terminal group of core processing module, the action of each module of core processing module dispatch deal with Power consumption mode, and three blood oxygen received, heart rate, blood pressure parameters are subjected to data frame and are packaged to obtain data packet, the data packet Reception terminal is sent to through data transmission module；
The power module is blood oxygen heart rate acquisition module, blood pressure acquisition module, core processing module, data transmission module Power supply.
By above-mentioned design, core processing module receives the blood of blood oxygen heart rate acquisition module and the acquisition of blood pressure acquisition module Oxygen, heart rate, blood pressure data, and according to the work of data cases scheduling modules, keep work power consumption as low as possible, to save The electric power for not needing to expend largely is saved, equipment is longer using the time.
Further design, the data transmission module are NFC module, then receiving terminal is NFC reading device.
The characteristics of NFC module is that card mold simulation models can be opened after data are written, i.e. NFC module itself is in not power consumption State is powered by NFC radiofrequency signal to NFC module, when NFC reading device is read close to NFC module to make NFC mould For block by the data feedback being written before to NFC reading device, receiving and transmitting signal is the energy that in-house facility will not be lost.
Further design, further includes display module, the input terminal group connection core processing module of the display module Show output end group.Data can be shown the data of acquisition by display module with treated, intuitively be expressed to user.
A kind of low-power consumption working method of multi-parameter wrist life physical sign monitoring device, content are as follows:
Step 1, the whether intact wearing of core processing module judgment means, not with wearing, device enters standby mode, if Intact wearing, device are started to work；
Step 2, blood oxygen heart rate acquisition module, blood pressure acquisition module are with frequency acquisition f1, acquisition interval duration t1When acquisition Between blood oxygen in T, heart rate, blood pressure parameter, and be sent to core processing module in real time；
Blood oxygen in time T, heart rate, blood pressure parameter are carried out data frame packing, obtained by step 3, the core processing module To data packet；
Step 4, the core processing module are sent to data transmission module and finally send to reception after encrypting data packet Terminal；
Step 5, the data packet reaches after data transmission module n seconds, described if device does not enter the mode of stopping working Core processing module closes the clock of the blood oxygen heart rate acquisition module, blood pressure acquisition module, data transmission module, and by core The operating current of processing module is by I3It is adjusted to I4, I3>I4, device, which enters, to stop working mode, and waiting wakes up next time.
Due to the equipment of wearing need to judge match wear again without with wearing, do not match wear when, the data of detection There is no practical significance, for equipment there is no need to directly start to detect, need of work at this time controls the mode low in power consumption, i.e. step The whether intact wearing of one judgment means, just starts to work normally with having worn, and otherwise low power supply is standby, is able to achieve device and examines automatically It surveys and works, one begins to detect with wearing, and does not need the switch for manually controlling detection, also saves with to be detected after wearing etc. The time of work, namely saved power consumption；And after one-time detection is completed and transmits data, device can close, this fashionable dress Meeting automatic checking device is set either with or without stopping working, it's not true to avoid continuous standby from consuming automatically into the mode of stopping working Electricity.
Specific step 1 content are as follows:
A1, the core processing module preset the reflection photo threshold of blood oxygen heart rate acquisition module；
A2, after the intensity of reflected light signal of the core processing module real-time reception to blood oxygen heart rate acquisition module, if instead Light intensity signal is penetrated less than the reflection photo threshold, then judgment means are not matched and worn, and into A3, otherwise enter step two；
A3, the core processing module is by the operating current of blood oxygen heart rate acquisition module by I1It is adjusted to I2, I1>I2, return A2。
It is accustomed to according to the wearing of people, blood pressure acquisition module (generally blood pressure detecting gas band) is than blood oxygen heart rate acquisition module (such as finger blood oxygen Photoelectric Detection refers to folder) volume is bigger, then blood oxygen heart rate acquisition module is worn after the meeting, if blood oxygen heart rate acquires mould Block is with wearing, then whole device is also just matched and worn, therefore above-mentioned design can be according to the reflection of blood oxygen heart rate acquisition module Whether light intensity signal carrys out judgment means, which matches, wears, and when with wearing, intensity of reflected light signal can be higher than certain value (reflected light threshold Value), i.e., it can obtain wearing situation by the comparison of numerical value, intensity of reflected light signal is less than reflection photo threshold, can determine whether device Not with wearing, the operating current of blood oxygen heart rate acquisition module is turned down, the operating power consumption of whole device is reduced.
Specific step 3 includes following content:
B1, the core processing module real-time reception blood oxygen, heart rate, blood pressure parameter and three kinds of parameter groups by synchronization At one group of data group；
B2, the core processing module persistently extract a group data group of current time adjacent time at any time；
B3 compares the normal sign section that every kind of parameter is corresponding in a group data group, if each parameter value is normal In sign section, the core processing module is by the frequency acquisition of device by f1It is adjusted to f2, acquisition interval duration is by t1It is adjusted to t2, f1 >f2, t1>t2, into B4；
Otherwise it keeps current frequency acquisition and returns to B2；
B4, when any parameter value is not in normal sign section in a group data group of any moment, the core processing mould Block is by the frequency acquisition of device by f2Adjust back to f1, acquisition interval duration is by t2Adjust back to t1；
B5, until time T terminates, the data group that the core processing module will acquire carries out data frame packing, obtains Data packet.
According to above-mentioned design, the control feature of the present apparatus is also resided in data detection process, abnormal sign data reference Value is higher than normally, if sign data is constantly in normal interval, these normal data references values are lower, just Number (etc. that the interval duration of the acquisition of blood oxygen heart rate acquisition module and blood pressure acquisition module can suitably be turned down and acquired every time Imitate in the frequency acquired every time), and once there is sign data exception, then frequency acquisition is adjusted back, on the one hand reduction power consumption, one Aspect also can be reduced data volume, and the processing complexity of data is preferably minimized.
It further designs, the data packet in the B5 is made of data head, data field, data tail；
Wherein, the data head includes the data field of the start bit of 1 byte, the message numbering of 1 byte, 2 bytes Length, the content of the start bit are 0xA0, number of the content of the message numbering between 0-255, first data packet Message numbering is random value, and the message numbering of each data packet is that previous value adds one later, and the data field length is The real data length of data field；
The data field accounts for 22 bytes, including 10 groups of blood oxygen parameters, 10 groups of hrv parameters, 1 group of blood pressure parameter, often Group blood oxygen parameter accounts for 1 byte, and every group of hrv parameter accounts for 1 byte, and every group of blood pressure parameter accounts for 2 bytes；
The data tail includes the check code of 1 byte and the stop bits of 1 byte, and the content of the stop bits is 0xF0。
The format of above-mentioned data packet is conducive to the verification in data transmission procedure, in verification, first checks start bit, then compare To the entire content of data head and data field, finally checks stop bits, verification matching is only just calculated when three parts are completely the same It correctly, is otherwise wrong data, once the data of transmission are not right, then read once close to NFC module, and it is convenient and efficient.
Meanwhile in the B5 data frame be packaged when further include following content:
B5.1, the core processing module judge whether the frequency acquisition of every group of data group is f1, it is to retain the data group And enter B5.4, otherwise enter B5.2；
B5.2 transfers the front and back b group data group of the data group；
B5.3 judges whether the frequency acquisition of the b group data group is all consistent, is to delete wherein c group data group, only protect Stay b-c group data group, c <b；
Institute's data group with a grain of salt is carried out data frame packing, obtains data packet by B5.4.
Since the reference value of normal sign data is lower, for convenient for subsequent processing, above-mentioned design is by lasting regular Sign data delete part, need to only indicate that the sign monitored in a period of time is normal, and abnormal content is then protected completely Stay, embody the emphasis data of actual monitoring, the data volume of data packet can be substantially reduced, also reduce indirectly data processing when Between and energy consumption.
Further, the data transmission module is NFC module, and the core processing module is sent data packets to NFC module, and NFC module is set as card mold simulation models, open the standby setting of NFC module.Core processing module data frame It is writable NFC module after the completion of being packaged, device can be set as the mould that stops working after opening the card mold simulation models of NFC module Formula, the data of NFC module transmit no longer power consumption, and the electricity of whole device almost no longer consumes after the completion of capable of being packaged from data.
Further design, in blood oxygen heart rate acquisition module, in the blood pressure acquisition module acquisition interval period, the core Processing module control device enters the mode that stops working.
Above-mentioned each operating mode has normal mode of operation, standby mode, card mold simulation models, stop mode, wherein normally Operating mode is the operating mode that operating current maintains higher level, and standby mode is the lower operating mode of operating current, Each module still works in low-level under the mode, and card mold simulation models is the passive read mode of NFC module, and electric energy is filled by reading The NFC radiofrequency signal set provides, and stop mode is to close all working module, retains RTC clock only to wake up.
Beneficial effects of the present invention: equipment power dissipation is reduced from the angle of system level design that at low cost, effect is fast, effect The significant advantage of fruit rationally controls in chip in whole equipment workflow under the premise of not influencing equipment working performance The distribution of core operating mode and resource can satisfy the purpose of low power dissipation design.
Detailed description of the invention
Fig. 1 is the structural block diagram of monitoring device；
Fig. 2 is the structural schematic diagram of embodiment；
Fig. 3 is the flow diagram of method；
Fig. 4 is the work flow diagram of embodiment；
Fig. 5 is the verification mode flow chart of data packet.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
As shown in Figure 1, a kind of multi-parameter wrist life physical sign monitoring device, including blood oxygen heart rate acquisition module, blood pressure are adopted Collect module, core processing module, power module, data transmission module, display module,
The output end of the blood oxygen heart rate acquisition module, the output end of blood pressure acquisition module are separately connected core processing module Input terminal group, the action of each module of core processing module dispatch deal and power consumption mode, and the blood that will be received Three oxygen, heart rate, blood pressure parameters carry out data frame and are packaged to obtain data packet, which is sent to reception through data transmission module Terminal；The display output end group of the input terminal group connection core processing module of the display module.
The power module is blood oxygen heart rate acquisition module, blood pressure acquisition module, core processing module, data transmission mould Block, display module power supply.
The data transmission module is preferably NFC module, then receiving terminal is NFC reading device.
As shown in Fig. 2, blood oxygen heart rate acquisition module is preferably that blood oxygen heart rate refers to folder 1, MAX30102 sensor is used to adopt Collect blood oxygen hrv parameter, A/D converter built in the sensor can be directly from the number read after converting in fifo register PPG signal value is calculated blood oxygen heart rate value using bright rich Beer law by program, and is sent to core by I2C interface Processing module, frequency acquisition are defaulted as acquisition in every 30 seconds once, and not limited to this frequency can be formulated according to circumstances；
Blood pressure acquisition module is preferably blood pressure gas band 2, including pressure sensor, module main control chip, A/D conversion chip, Pressure value is calculated by oscillographic method, core processing module is sent data to by I2C interface, frequency acquisition is to adopt for every 5 minutes Collection is primary, and not limited to this frequency can be formulated according to circumstances；
Core processing module setting is in processing shell 3, and specific embodiment is using STM32F103RCT6 as core processing mould The main control chip of block, the chip are 32 8-digit microcontrollers based on ARM Cortex-M kernel, aim at require high-performance, it is low at Originally, the Embedded Application of low-power consumption specially designs, and possesses interface abundant and peripheral resources, can satisfy of the invention want It asks.Core processing module carries out the packing, verification, encryption etc. of data frame to three blood oxygen, heart rate, blood pressure parameters receiving Reason, and the result of three parameters is presented on the display module, while delivering a packet to NFC module.
Display module is mounted on processing 3 surface of shell, and the result of three blood oxygen, heart rate, blood pressure parameters is shown using OLED screen Value.
NFC module is integrated in processing shell 3, and using RF430CL330H as NFC communication chip, which be can be used as 4 label of NFC TYPE can reach the transmission rate of 848kbps, and working band 13.56MHz can automatic identification NFC number According to the structure of exchange format.NFC module is written into core processing module treated data by I2C interface, passes through NFC later Communication mode transfers data to terminal read module.
Power module be also integrated in processing shell 3 in, in order to meet the portability of device, using lithium battery to whole device into Row power supply.
A kind of low-power consumption working method of multi-parameter wrist life physical sign monitoring device, such as Fig. 3:
Step 1, the whether intact wearing of core processing module judgment means, not with wearing, device enters standby mode, if Intact wearing, device are started to work；
Step 2, blood oxygen heart rate acquisition module, blood pressure acquisition module are with frequency acquisition f1, acquisition interval duration t1When acquisition Between blood oxygen in T, heart rate, blood pressure parameter, and be sent to core processing module in real time；
Blood oxygen in time T, heart rate, blood pressure parameter are carried out data frame packing, obtained by step 3, the core processing module To data packet；
Step 4, the core processing module are sent to data transmission module and finally send to reception after encrypting data packet Terminal；
Step 5, the data packet reaches after data transmission module n seconds, described if device does not enter the mode of stopping working Core processing module closes the clock of the blood oxygen heart rate acquisition module, blood pressure acquisition module, data transmission module, and by core The operating current of processing module is by I3It is adjusted to I4, I3>I4, device, which enters, to stop working mode, and waiting wakes up next time.
The data transmission module is NFC module, and the core processing module sends data packets to NFC module, and will NFC module is set as card mold simulation models, opens the standby setting of NFC module.
In blood oxygen heart rate acquisition module, in the blood pressure acquisition module acquisition interval period, the core processing module control Device enters the mode that stops working.
In the present embodiment, working method is as shown in Figure 4:
Wherein, the particular content of step 1 are as follows:
A1, the core processing module preset the reflection photo threshold of blood oxygen heart rate acquisition module；
A2, after the intensity of reflected light signal of the core processing module real-time reception to blood oxygen heart rate acquisition module, if instead Light intensity signal is penetrated less than the reflection photo threshold, then judgment means are not matched and worn, and into A3, otherwise enter step two；
A3, the core processing module is by the operating current of blood oxygen heart rate acquisition module by I1It is adjusted to I2, I1>I2, return A2。
Step 3 includes following content:
B1, the core processing module real-time reception blood oxygen, heart rate, blood pressure parameter and three kinds of parameter groups by synchronization At one group of data group；
B2, the core processing module persistently extract a group data group of current time adjacent time at any time；
B3 compares the normal sign section that every kind of parameter is corresponding in a group data group, if each parameter value is normal In sign section, the core processing module is by the frequency acquisition of device by f1It is adjusted to f2, acquisition interval duration is by t1It is adjusted to t2, f1 >f2, t1>t2, into B4；
Otherwise it keeps current frequency acquisition and returns to B2；
B4, when any parameter value is not in normal sign section in a group data group of any moment, the core processing mould Block is by the frequency acquisition of device by f2Adjust back to f1, acquisition interval duration is by t2Adjust back to t1；
B5, until time T terminates, the data group that the core processing module will acquire carries out data frame packing, obtains Data packet.
Further include following content when data frame is packaged in the B5:
B5.1, the core processing module judge whether the frequency acquisition of every group of data group is f1, it is to retain the data group And enter B5.4, otherwise enter B5.2；
B5.2 transfers the front and back b group data group of the data group；
B5.3 judges whether the frequency acquisition of the b group data group is all consistent, is to delete wherein c group data group, only protect Stay b-c group data group, c <b；
Institute's data group with a grain of salt is carried out data frame packing, obtains data packet by B5.4.
Preferably, such as table 1 of the data packet in the step 3 is made of data head, data field, data tail；
Wherein, the data head includes the data field of the start bit of 1 byte, the message numbering of 1 byte, 2 bytes Length, the content of the start bit are 0xA0, number of the content of the message numbering between 0-255, first data packet Message numbering is random value, and the message numbering of each data packet is that previous value adds one later, and the data field length is The real data length of data field；
The data field accounts for 22 bytes, including 10 groups of blood oxygen parameters, 10 groups of hrv parameters, 1 group of blood pressure parameter, often Group blood oxygen parameter accounts for 1 byte, and every group of hrv parameter accounts for 1 byte, and every group of blood pressure parameter accounts for 2 bytes；
The data tail includes the check code of 1 byte and the stop bits of 1 byte, and the content of the stop bits is 0xF0。
Table 1
Specific data field preferred design such as table 2:
Table 2
The verification mode of the data packet is as shown in Figure 5:
S1, the NFC reading terminals decrypt communication data；
Whether S2, the data head start bit after judging decryption are equal to 0xA0, are, into next step, otherwise abandon and this time connect The communication data of receipts；
S3 carries out CRC check since data head start bit until last position of data field, and by check value and institute The check code for stating data tail compares, and the two unanimously then enters in next step, otherwise abandons this time received communication data；
S4, judges whether data tail stop bits is equal to 0xF0, is, into next step, otherwise abandons this time received communication Data；
Communication data is identified as data packet, and is uploaded to host computer by S5.
Wherein, step S3 further includes the following contents:
S3.1 carries out CRC check since data head start bit until last position of data field, and by check value with The check code of the data tail compares, and the two unanimously then enters S4, otherwise enters S3.2；
S3.2 judges the position of wrong data in communication data according to the remainder item of CRC, if wrong data belong to blood oxygen/ Otherwise heart rate abandons this time received communication data into next step；
Whether S3.3, the range for the data that judge incorrectly are less than or equal to 1 byte, are, the byte of mistake is set 0, into S4, Otherwise this time received communication data is abandoned.
Its time of measuring is set to 5 minutes by the present embodiment for the higher blood pressure measurement of power consumption, and for power consumption Its time of measuring is set to 30s by lower blood oxygen heart rate measurement.
Photo threshold is reflected in the setting of blood oxygen heart rate acquisition module, and the PROX_INT_THRESH [7:0] in setting MAX30102= 0x01, i.e. threshold value are set as 1023, since the chip can be digital from the PPG signal after obtaining ADC conversion in fifo register Value, digital value obtained in this register can be compared with set threshold value, be less than in intensity of reflected light set Threshold value when, i.e., when finger is not put on a sensor, turn down LED current, reduce the intensity of LED lamplight, PILOT_ is set The value of PA [7:0] register is 0x02, and standby current is about 0.2mA at this time, standby mode when realizing without measurement；Work as reflected light When intensity is greater than set threshold value, i.e., when finger is put on a sensor, then LED current tuned up, REG_LED1_PA is set Value with REG_LED2_PA register is 0x24, and operating current is about that 7mA reaches the intensity of light normally measured at this time, is started Normal mode of operation.
The value that SPO2_SR [2:0] in 0x0A register is arranged is 011, i.e., blood oxygen heart rate acquisition module to PPG signal Sample rate starts to be set as 400Hz when measurement.During the measurement of heart rate blood oxygen levels and calculating carry out 10 groups, if heart rate It is always held at 60~100, blood oxygen is maintained at 90% or more, high pressure 90~140, in the normal range (NR) of low pressure 60~90, just will The value of SPO2_SR [2:0] is set as 001 in 0x0A register, and the sample rate of PPG signal is reduced to 100Hz at this time, while by blood Oxygen heart rate acquisition time interval extends to 1 minute.
Blood oxygen, heart rate, blood pressure measurement process in if it find that any exception, for example obtained end value is not normal In range, when PPG sign mutation amplitude is more than threshold value, the sample rate of blood oxygen heart rate acquisition module and measurement interval are restored at once Continue to measure for 400Hz and 30s.
The power consumption situation of tri- kinds of operating modes of NFC is comprehensively compared, selects card mold simulation models least in power-consuming as NFC module Operating mode, while being to set by the STANDBY_ENABLE of CONTROL_REG register in NFC communication chip RF430CL330H 1, realize the lowest power consumption of NFC module.
In the interval time of measurement section of blood oxygen heart rate and blood pressure, use the stop mode of core processing module: institute is sometimes Zhong Douyi stops；The work of 1.8V core power；PLL, HIS and HSERC oscillator function are forbidden；Register and SRAM content are protected It stays, can reduce the overall power of system under the premise of not losing the data that measurement obtains, at the end of interval time, pass through RTC ALARM event, which again wakes up whole system, enters normal mode of operation.
Core processing module running current: 93.6~95.5mA, 53.0~53.2mA of stop mode measure the blood oxygen heart The operating current of rate acquisition module such as table 3:
Table 3
| 100Hz Sampling | 400Hz Sampling | |
| Current(under threshold) | 2.1mA~2.2mA | 2.1mA~2.2mA |
| Current(above threshold) | 3.8mA~4.5mA | 8.22mA~8.24mA |
As can be seen that operating current remains at 2.1mA~2.2mA lower than under reflected light threshold condition, electricity is saved Power, and when physical sign parameters are in normal interval, is adjusted to 100Hz under frequency acquisition, operating current at this time be 3.8mA~ 4.5mA, the low nearly half of operating current 8.22mA~8.24mA when than exception, the energy consumption of overall work substantially reduce.
Claims (10)
1.一种多参数腕式生命体征监测装置，其特征在于：包括血氧心率采集模块、血压采集模块、核心处理模块、电源模块、数据传输模块，所述血氧心率采集模块的输出端、血压采集模块的输出端分别连接核心处理模块的输入端组，所述核心处理模块调度处理各模块的工作内容与能耗模式，并将接收到的血氧、心率、血压三个参数进行数据帧打包得到数据包，该数据包经数据传输模块发送至接收终端；1. a multi-parameter wrist-type vital signs monitoring device, is characterized in that: comprise blood oxygen heart rate acquisition module, blood pressure acquisition module, core processing module, power supply module, data transmission module, the output end of described blood oxygen heart rate acquisition module, The output terminals of the blood pressure acquisition module are respectively connected to the input terminal groups of the core processing module. The core processing module schedules and processes the work content and energy consumption mode of each module, and performs data frames on the received three parameters of blood oxygen, heart rate and blood pressure. Packing to obtain a data packet, the data packet is sent to the receiving terminal through the data transmission module; 所述电源模块为血氧心率采集模块、血压采集模块、核心处理模块、数据传输模块供电。The power supply module supplies power for the blood oxygen heart rate acquisition module, the blood pressure acquisition module, the core processing module and the data transmission module. 2.根据权利要求1所述的一种多参数腕式生命体征监测装置，其特征在于：所述数据传输模块为NFC模块，则接收终端为NFC读取装置。2 . The multi-parameter wrist vital signs monitoring device according to claim 1 , wherein the data transmission module is an NFC module, and the receiving terminal is an NFC reading device. 3 . 3.根据权利要求1所述的一种多参数腕式生命体征监测装置，其特征在于：还包括显示模块，所述显示模块的输入端组连接核心处理模块的显示输出端组。3 . The multi-parameter wrist-type vital sign monitoring device according to claim 1 , further comprising a display module, the input terminal group of the display module is connected to the display output terminal group of the core processing module. 4 . 4.一种多参数腕式生命体征监测装置的低功耗工作方法，其特征在于：4. A low power consumption working method of a multi-parameter wrist vital sign monitoring device, characterized in that: 步骤一，核心处理模块判断装置是否完好配戴，未配戴好，装置进入待机模式，若已完好配戴，装置开始工作；Step 1, the core processing module judges whether the device is properly worn, if not, the device enters the standby mode, and if it is properly worn, the device starts to work; 步骤二，血氧心率采集模块、血压采集模块以采集频率f1、采集间隔时长t1采集时间T内的血氧、心率、血压参数，并实时发送至核心处理模块；Step 2, the blood oxygen and heart rate collection module and the blood pressure collection module collect the blood oxygen, heart rate, and blood pressure parameters within the time T at the collection frequency f 1 and the collection interval duration t 1 , and send them to the core processing module in real time; 步骤三，所述核心处理模块将时间T内的血氧、心率、血压参数进行数据帧打包，得到数据包；Step 3, the core processing module packs the parameters of blood oxygen, heart rate and blood pressure within the time T into data frames to obtain data packets; 步骤四，所述核心处理模块将数据包加密后发送至数据传输模块并最终送至接收终端；Step 4, the core processing module encrypts the data packet and sends it to the data transmission module and finally sends it to the receiving terminal; 步骤五，所述数据包传至数据传输模块后n秒，若装置未进入停止工作模式，所述核心处理模块关闭所述血氧心率采集模块、血压采集模块、数据传输模块的时钟，并将核心处理模块的工作电流由I3调为I4，I3>I4，装置进入停止工作模式，等待下一次唤醒。Step 5, n seconds after the data packet is transmitted to the data transmission module, if the device does not enter the stop working mode, the core processing module turns off the clocks of the blood oxygen heart rate acquisition module, blood pressure acquisition module, and data transmission module, and sends the The working current of the core processing module is adjusted from I 3 to I 4 , I 3 >I 4 , the device enters the stop working mode and waits for the next wake-up. 5.根据权利要求4所述的低功耗工作方法，其特征在于步骤一的具体内容为：5. low power consumption working method according to claim 4 is characterized in that the concrete content of step 1 is: A1，所述核心处理模块预先设定血氧心率采集模块的反射光阈值；A1, the core processing module presets the reflected light threshold of the blood oxygen heart rate acquisition module; A2，所述核心处理模块实时接收到血氧心率采集模块的反射光强度信号后，若反射光强度信号小于所述反射光阈值，则判断装置未配戴好，进入A3，否则进入步骤二；A2, after the core processing module receives the reflected light intensity signal of the blood oxygen and heart rate acquisition module in real time, if the reflected light intensity signal is less than the reflected light threshold, it is determined that the device is not properly worn, and the process goes to A3, otherwise, it goes to step 2; A3，所述核心处理模块将血氧心率采集模块的工作电流由I1调为I2，I1>I2，返回A2。A3, the core processing module adjusts the working current of the blood oxygen and heart rate acquisition module from I 1 to I 2 , I 1 >I 2 , and returns to A2. 6.根据权利要求4所述的低功耗工作方法，其特征在于步骤三包括如下内容：6. The low power consumption working method according to claim 4, is characterized in that step 3 comprises the following content: B1，所述核心处理模块实时接收血氧、心率、血压参数并将同一时刻的三种参数组成一组数据组；B1, the core processing module receives blood oxygen, heart rate, and blood pressure parameters in real time and forms a data group of the three parameters at the same time; B2，所述核心处理模块随时间持续提取当前时间相邻时间的a组数据组；B2, the core processing module continuously extracts a group of data groups at the adjacent time of the current time over time; B3，比对a组数据组中每种参数与其对应的正常体征区间，若每一参数值均在正常体征区间内，所述核心处理模块将装置的采集频率由f1调为f2，采集间隔时长由t1调为t2，f1>f2，t1>t2，进入B4；B3: Compare each parameter in the data set of group a with its corresponding normal sign interval, if each parameter value is within the normal sign interval, the core processing module adjusts the collection frequency of the device from f 1 to f 2 , and collects The interval duration is adjusted from t 1 to t 2 , f 1 >f 2 , t 1 >t 2 , and enter B4; 否则保持当前采集频率并返回B2；Otherwise, keep the current acquisition frequency and return to B2; B4，当任一时刻的a组数据组中任一参数值不在正常体征区间内，所述核心处理模块将装置的采集频率由f2调回到f1，采集间隔时长由t2调回到t1；B4, when any parameter value in the data group of group a at any moment is not within the normal sign interval, the core processing module adjusts the acquisition frequency of the device from f 2 back to f 1 , and the acquisition interval time from t 2 back to t 1 ; B5，直到时间T结束，所述核心处理模块将获取到的数据组进行数据帧打包，得到数据包。B5, until the end of time T, the core processing module packs the acquired data group into a data frame to obtain a data packet. 7.根据权利要求6所述的低功耗工作方法，其特征在于：所述B5中数据帧打包时还包括如下内容：7. The low-power-consumption working method according to claim 6, wherein: the data frame in the B5 also includes the following content when packing: B5.1，所述核心处理模块判断每组数据组的采集频率是否为f1，是，保留该数据组并进入B5.4，否则进入B5.2；B5.1, the core processing module judges whether the collection frequency of each data group is f 1 , if yes, keep the data group and enter B5.4, otherwise enter B5.2; B5.2，调取该数据组的前后b组数据组；B5.2, call the data groups before and after the data group b; B5.3，判断所述b组数据组的采集频率是否都一致，是，删除其中c组数据组，仅保留b-c组数据组，c<b；B5.3, judge whether the collection frequency of the b group data group is consistent, yes, delete the c group data group, and only keep the b-c group data group, c<b; B5.4，将所有保留的数据组进行数据帧打包，得到数据包。B5.4, pack all reserved data groups into data frames to obtain data packets. 8.根据权利要求4所述的低功耗工作方法，其特征在于：所述步骤三中的数据包由数据头、数据区、数据尾组成；8. The low power consumption working method according to claim 4, wherein the data packet in the step 3 is composed of a data header, a data area and a data tail; 其中，所述数据头包括1个字节的起始位、1个字节的消息编号、2个字节的数据区长度，所述起始位的内容为0xA0，所述消息编号的内容为0-255之间的数，第一个数据包的消息编号为随机取值，之后每个数据包的消息编号为前一个的值加一，所述数据区长度为数据区的实际数据长度；The data header includes a start bit of 1 byte, a message number of 1 byte, and a data area length of 2 bytes, the content of the start bit is 0xA0, and the content of the message number is The number between 0-255, the message number of the first data packet is a random value, the message number of each data packet after that is the value of the previous one plus one, and the length of the data area is the actual data length of the data area; 所述数据区占22个字节，其中包括10组血氧参数、10组心率参数、1组血压参数，每组血氧参数占1个字节，每组心率参数占1个字节，每组血压参数占2个字节；The data area occupies 22 bytes, including 10 groups of blood oxygen parameters, 10 groups of heart rate parameters, and 1 group of blood pressure parameters. Each group of blood oxygen parameters occupies 1 byte, and each group of heart rate parameters occupies 1 byte. The group blood pressure parameter occupies 2 bytes; 所述数据尾包括1个字节的校验码和1个字节的结束位，所述结束位的内容为0xF0。The data tail includes a check code of 1 byte and an end bit of 1 byte, and the content of the end bit is 0xF0. 9.根据权利要求4所述的低功耗工作方法，其特征在于：所述数据传输模块为NFC模块，所述核心处理模块将数据包发送至NFC模块，并将NFC模块设为卡模拟模式，开启NFC模块的standby设置。9 . The low power consumption working method according to claim 4 , wherein the data transmission module is an NFC module, the core processing module sends data packets to the NFC module, and sets the NFC module to a card emulation mode. 10 . , and enable the standby setting of the NFC module. 10.根据权利要求4所述的低功耗工作方法，其特征在于：在血氧心率采集模块、血压采集模块采集间隔时间段内，所述核心处理模块控制装置进入停止工作模式。10 . The low power consumption working method according to claim 4 , wherein in the collection interval time period of the blood oxygen heart rate collection module and the blood pressure collection module, the core processing module control device enters a stop working mode. 11 .
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