CN102982674A - wireless sensing device and method - Google Patents

无线感测装置与方法。该无线感测装置，包括光电转换器、压控振荡器和处理单元。光电转换器接收第一光信号并据以产生电信号，其中该第一光信号是由待测物反射第二光信号而产生。压控振荡器耦接该光电转换器，在该电信号的干扰下产生振荡信号，其中该振荡信号随该电信号的变动而变化。处理单元耦接该压控振荡器，依据该振荡信号的变化评估该待测物的运动参数。

A wireless sensing device and method. The wireless sensing device includes a photoelectric converter, a voltage-controlled oscillator, and a processing unit. The photoelectric converter receives a first optical signal and generates an electrical signal accordingly, wherein the first optical signal is generated by the object to be detected reflecting a second optical signal. The voltage-controlled oscillator is coupled to the photoelectric converter and generates an oscillation signal under the interference of the electrical signal, wherein the oscillation signal changes with the change of the electrical signal. The processing unit is coupled to the voltage-controlled oscillator and evaluates the motion parameters of the object to be detected according to the change of the oscillation signal.

无线感测装置与方法Wireless sensing device and method

本申请是申请日为2010年05月18日、申请号为201010183011.X、发明名称为“无线感测装置与方法”的发明专利申请的分案申请。This application is a divisional application of an invention patent application with an application date of May 18, 2010, an application number of 201010183011.X, and an invention title of "Wireless Sensing Device and Method".

技术领域technical field

本发明涉及一种感测器，且特别涉及一种无线感测装置与方法。The invention relates to a sensor, and in particular to a wireless sensing device and method.

背景技术Background technique

近几年，随着物质生活的提升，人们对于健康问题的意识也渐渐地抬头。由于大多数民众对于自己的身体状态或是环境状态经常后知后觉，而忽略身体所发出的警讯。因此为了让一般民众能够就近观察自身的生理状况，坊间也陆续出现各式各样的测量器材。如此一来，一般民众便能够经由各种测量器材来监视自己体内的生理变化，而能够即时查觉自身的健康状况是否已亮起红灯，进而注意自己的体能以及作适当的调整。In recent years, with the improvement of material life, people's awareness of health issues has gradually risen. Because most people are often belatedly aware of their physical state or environmental state, and ignore the warning signals sent by the body. Therefore, in order to allow the general public to observe their own physiological conditions nearby, various measuring devices have appeared in the market. In this way, the general public can monitor the physiological changes in their bodies through various measuring devices, and can instantly detect whether their health status has turned red, and then pay attention to their physical fitness and make appropriate adjustments.

有鉴于此，已知生理信号感测电路设计主要可分为两种型式，其一为采用接触式感测的生理信号感测器，另一则是采用非接触式感测的生理信号感测器。采用接触式感测的生理信号感测器大都需要通过接触人体的方式来进行测量。此架构的电路组成简单，但使用上需接触人体，且若需长时间使用时，感测线路会造成使用者感到相当程度的不适。In view of this, the known physiological signal sensing circuit design can be mainly divided into two types, one is the physiological signal sensor using contact sensing, and the other is the physiological signal sensing using non-contact sensing device. Most of the physiological signal sensors using contact sensing need to measure by touching the human body. The circuit composition of this structure is simple, but the use needs to be in contact with the human body, and if it needs to be used for a long time, the sensing circuit will cause the user to feel a considerable degree of discomfort.

另外，采用非接触式感测的生理信号感测器多半以多普勒雷达架构为基础。传统多普勒雷达的操作原理为：产生一弦波信号，经过功率分配器后，其中一路连接至天线，将弦波信号辐射至人体胸腔位置，因为胸腔的起伏而使弦波信号频率产生多普勒效应，将反射后的信号与功率分配器输出端的另一路经由混频器及后续处理后，即可得到生理观测情形。但上述生理信号感测器会因为反射波与功率分配器输出弦波的相位差异可能产生相消干涉，因而产生感测零点在某些特定位置无法进行感测，限制实际的应用，且架构较复杂、耗电量较大及成本昂贵，并容易受到感测距离的变化而产生感测结果不一致的情形。In addition, most physiological signal sensors using non-contact sensing are based on the Doppler radar architecture. The operation principle of the traditional Doppler radar is: generate a sine wave signal, after passing through the power divider, one of them is connected to the antenna, and radiate the sine wave signal to the chest cavity of the human body. According to the Puller effect, after the reflected signal and the other output of the power divider pass through the mixer and subsequent processing, the physiological observation situation can be obtained. However, the above-mentioned physiological signal sensor may produce destructive interference due to the phase difference between the reflected wave and the output sine wave of the power divider, so the sensing zero point cannot be sensed at some specific positions, which limits the practical application, and the structure is relatively complex. It is complex, consumes a lot of power, is expensive, and is susceptible to inconsistent sensing results due to changes in sensing distance.

发明内容Contents of the invention

本发明提供一种无线感测装置与方法，藉以有效地避免感测零点，并可减少电路元件使用，进而降低制造成本以及功率消耗。The invention provides a wireless sensing device and method, thereby effectively avoiding the sensing zero point, reducing the use of circuit components, and further reducing manufacturing costs and power consumption.

本发明提出一种无线感测装置，包括天线、压控振荡器与处理单元。天线接收第一无线信号并据以产生电信号，其中第一无线信号是由待测物反射第二无线信号而产生。压控振荡器耦接第一天线，在电信号的干扰下产生振荡信号，其中振荡信号随电信号的变动而变化。处理单元耦接压控振荡器，依据振荡信号的变化评估待测物的参数。The invention provides a wireless sensing device, including an antenna, a voltage-controlled oscillator and a processing unit. The antenna receives the first wireless signal and generates an electrical signal accordingly, wherein the first wireless signal is generated by reflecting the second wireless signal from the object under test. The voltage-controlled oscillator is coupled to the first antenna and generates an oscillating signal under the interference of the electrical signal, wherein the oscillating signal changes with the variation of the electrical signal. The processing unit is coupled to the voltage-controlled oscillator, and evaluates the parameters of the object under test according to the change of the oscillation signal.

本发明提出一种无线感测装置，包括光电转换器、压控振荡器与处理单元。光电转换器接收第一光信号并据以产生电信号，其中第一光信号是由待测物反射第二光信号而产生。压控振荡器耦接光电转换器，在电信号的干扰下产生振荡信号，其中振荡信号随电信号的变动而变化。处理单元耦接压控振荡器，依据振荡信号的变化评估待测物的参数。The invention provides a wireless sensing device, including a photoelectric converter, a voltage-controlled oscillator and a processing unit. The photoelectric converter receives the first optical signal and generates an electrical signal accordingly, wherein the first optical signal is generated by reflecting the second optical signal from the object under test. The voltage-controlled oscillator is coupled to the photoelectric converter and generates an oscillating signal under the interference of the electrical signal, wherein the oscillating signal changes with the variation of the electrical signal. The processing unit is coupled to the voltage-controlled oscillator, and evaluates the parameters of the object under test according to the change of the oscillation signal.

本发明提出一种无线感测装置，包括天线与压控振荡器。天线接收第一无线信号并据以产生电信号，其中第一无线信号是由待测物反射第二无线信号而产生。压控振荡器耦接天线，在电信号的干扰下产生振荡信号，其中振荡信号随电信号的变动而变化，且振荡信号用以评估待测物的参数。The invention provides a wireless sensing device, which includes an antenna and a voltage-controlled oscillator. The antenna receives the first wireless signal and generates an electrical signal accordingly, wherein the first wireless signal is generated by reflecting the second wireless signal from the object under test. The voltage-controlled oscillator is coupled to the antenna to generate an oscillating signal under the interference of the electrical signal, wherein the oscillating signal changes with the variation of the electrical signal, and the oscillating signal is used to evaluate the parameters of the object under test.

本发明提出一种无线感测装置，包括光电转换器与压控振荡器。光电转换器接收第一光信号并据以产生电信号，其中第一光信号是由待测物反射第二光信号而产生。压控振荡器耦接光电转换器，在电信号的干扰下产生振荡信号，其中振荡信号随电信号的变动而变化，且振荡信号用以评估待测物的运动参数。The invention provides a wireless sensing device, including a photoelectric converter and a voltage-controlled oscillator. The photoelectric converter receives the first optical signal and generates an electrical signal accordingly, wherein the first optical signal is generated by reflecting the second optical signal from the object under test. The voltage-controlled oscillator is coupled to the photoelectric converter to generate an oscillating signal under the interference of the electrical signal, wherein the oscillating signal changes with the variation of the electrical signal, and the oscillating signal is used to evaluate the motion parameter of the object under test.

本发明提出一种无线感测方法，包括下列步骤。通过天线接收第一无线信号并据以产生电信号，其中第一无线信号是由待测物反射第二无线信号而产生。在电信号的干扰下，通过压控振荡器产生振荡信号，其中振荡信号随电信号的变动而变化，且振荡信号用以评估待测物的参数。The invention proposes a wireless sensing method, which includes the following steps. The first wireless signal is received by the antenna and an electrical signal is generated accordingly, wherein the first wireless signal is generated by reflecting the second wireless signal from the object under test. Under the interference of the electrical signal, an oscillating signal is generated by the voltage-controlled oscillator, wherein the oscillating signal changes with the variation of the electrical signal, and the oscillating signal is used to evaluate the parameters of the object under test.

本发明提出一种无线感测方法，包括下列步骤。通过光电转换器将所接收的第一光信号转换成电信号，其中第一光信号是由待测物反射第二光信号而产生。在电信号的干扰下，通过压控振荡器产生振荡信号，其中振荡信号随电信号的变动而变化，且振荡信号用以评估待测物的运动参数。The invention proposes a wireless sensing method, which includes the following steps. The received first optical signal is converted into an electrical signal through a photoelectric converter, wherein the first optical signal is generated by reflecting the second optical signal from the object under test. Under the interference of the electrical signal, an oscillating signal is generated by the voltage-controlled oscillator, wherein the oscillating signal changes with the variation of the electrical signal, and the oscillating signal is used to evaluate the motion parameter of the object to be tested.

本发明通过天线接收经由待测物反射第二无线信号（或第二光信号）而产生的第一无线信号（或第一光信号），并据以产生电信号，接着压控振荡器依据电信号而产生振荡信号，并传送至处理单元进行处理，进而获得待测物的参数以进行评估。如此一来，本发明可有效地避免感测零点，并可大幅减少电路元件使用，进而可降低制造成本及功率消耗。The present invention receives the first wireless signal (or first optical signal) generated by reflecting the second wireless signal (or second optical signal) through the object to be tested through the antenna, and generates an electrical signal accordingly, and then the voltage-controlled oscillator according to the electrical signal The signal generates an oscillating signal, which is sent to the processing unit for processing, and then the parameters of the object under test are obtained for evaluation. In this way, the present invention can effectively avoid the sensing zero point, and greatly reduce the use of circuit components, thereby reducing manufacturing cost and power consumption.

为让本发明的上述特征和优点能更明显易懂，下文特举实施例，并配合附图作详细说明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

附图说明Description of drawings

图1为本发明的一实施例的无线感测装置的方块图。FIG. 1 is a block diagram of a wireless sensing device according to an embodiment of the present invention.

图2为图1的无线感测装置的详细电路方块图。FIG. 2 is a detailed circuit block diagram of the wireless sensing device of FIG. 1 .

图3为本发明的另一实施例的无线感测装置的方块图。FIG. 3 is a block diagram of a wireless sensing device according to another embodiment of the present invention.

图4为本发明的又一实施例的无线感测装置的方块图。FIG. 4 is a block diagram of a wireless sensing device according to another embodiment of the present invention.

【主要元件符号说明】[Description of main component symbols]

100、200、300、400：无线感测装置100, 200, 300, 400: wireless sensing device

110、120、210、220、310、320：天线110, 120, 210, 220, 310, 320: Antenna

130、230、330、340、430：压控振荡器130, 230, 330, 340, 430: voltage controlled oscillator

140、240、350、440：处理单元140, 240, 350, 440: processing unit

180、280、380、480：待测物180, 280, 380, 480: DUT

221、222：放大器221, 222: amplifier

250：解调单元250: demodulation unit

251：延迟器251: Delay

252：混频器252: Mixer

260：信号处理单元260: Signal processing unit

261：模拟数字转换器261: Analog-to-Digital Converter

262：数字信号处理器262: Digital Signal Processor

263：数字模拟转换器263: Digital to Analog Converter

270：低通滤波器270: Low Pass Filter

SRX：第一无线信号SRX: First Wireless Signal

STX：第二无线信号STX: Second wireless signal

SV：电信号SV: electrical signal

SO：振荡信号SO: Oscillating signal

SO1：第一振荡信号SO1: the first oscillation signal

SO2：第二振荡信号SO2: second oscillation signal

SVO：电压信号SVO: voltage signal

SD：数字信号SD: digital signal

SDJ：数字调整信号SDJ: Digitally adjusted signal

SJ：调整信号SJ: adjust the signal

SL1：第一光信号SL1: first optical signal

SL2：第二光信号SL2: second optical signal

具体实施方式Detailed ways

图1为本发明的一实施例的无线感测装置的方块图。请参照图1，无线感测装置100包括天线110、120、压控振荡器130与处理单元140。天线110（例如接收天线）接收第一无线信号（例如射频调制信号）SRX，并据以产生电信号SV。压控振荡器130耦接天线110，在电信号SV的干扰下产生振荡信号SO，其中振荡信号SO会随电信号SV的变动而变化。在本实施例中，压控振荡器130在电信号SV的干扰下，会启动自我注入锁定（selfinjection lock）作用，以产生振荡信号SO。FIG. 1 is a block diagram of a wireless sensing device according to an embodiment of the present invention. Referring to FIG. 1 , the wireless sensing device 100 includes antennas 110 , 120 , a voltage-controlled oscillator 130 and a processing unit 140 . The antenna 110 (such as a receiving antenna) receives a first wireless signal (such as a radio frequency modulation signal) SRX, and generates an electrical signal SV accordingly. The voltage controlled oscillator 130 is coupled to the antenna 110 and generates an oscillating signal SO under the interference of the electrical signal SV, wherein the oscillating signal SO will vary with the variation of the electrical signal SV. In this embodiment, the voltage-controlled oscillator 130 starts a self-injection lock (selfinjection lock) function under the interference of the electrical signal SV to generate the oscillating signal SO.

处理单元140耦接压控振荡器130，依据振荡信号SO的变化评估上述待测物180的参数。天线120（例如发射天线）耦接压控振荡器130，接收振荡信号SO并据以产生第二无线信号STX至待测物180，使得待测物180会反射第二无线信号STX而产生第一无线信号SRX。在本实施例中，待测物180例如为人体，且待测物180的参数例如为心跳、脉搏、呼吸与动作（例如肢体动作）等相关的参数。另外，第一无线信号SRX的频率不同于第二无线信号STX的频率。The processing unit 140 is coupled to the voltage-controlled oscillator 130 and evaluates the parameters of the DUT 180 according to the variation of the oscillation signal SO. The antenna 120 (such as a transmitting antenna) is coupled to the voltage-controlled oscillator 130, receives the oscillating signal SO and generates a second wireless signal STX to the object under test 180, so that the object under test 180 will reflect the second wireless signal STX to generate the first Wireless signal SRX. In this embodiment, the object under test 180 is, for example, a human body, and the parameters of the object under test 180 are, for example, parameters related to heartbeat, pulse, respiration, and movements (eg, body movements). In addition, the frequency of the first wireless signal SRX is different from the frequency of the second wireless signal STX.

以下，将说明无线感测装置100的运作。首先，天线120发射第二无线信号STX至待测物（人体）180，而待测物180会反射第二无线信号STX而产生第一无线信号SRX至天线110。在本实施例中，由于人体的呼吸及心跳起伏或脉搏及肢体动作等，所以第二无线信号STX与相对运动的呼吸及心跳起伏或脉搏及肢体动作就会产生多普勒效应，因此，通过人体反射第二无线信号STX而产生的第一无线信号SRX具有不同的频率，且第一无线信号SRX的频率也不同于第二无线信号STX的频率。接着，天线110接收第一无线信号SRX并据以产生电信号SV至压控振荡器130，而压控振荡器130会依据电信号SV而产生振荡信号SO至处理单元140，并且振荡信号SO中会具有人体的心跳、呼吸、脉搏或动作等的信息（亦即待测物180的参数）。之后，处理单元140便会对振荡信号SO进行处理而获得人体的心跳、呼吸、脉搏或动作的相关信息，而使用者便上述信息来评估自己现在的身体状况。Hereinafter, the operation of the wireless sensing device 100 will be described. Firstly, the antenna 120 transmits the second wireless signal STX to the object under test (human body) 180 , and the object under test 180 reflects the second wireless signal STX to generate the first wireless signal SRX to the antenna 110 . In this embodiment, due to the human body's breathing and heartbeat fluctuations or pulse and body movements, etc., the second wireless signal STX and the relative movement of breathing and heartbeat fluctuations or pulse and body movements will produce Doppler effects. Therefore, by The first wireless signal SRX generated by the human body reflecting the second wireless signal STX has a different frequency, and the frequency of the first wireless signal SRX is also different from the frequency of the second wireless signal STX. Next, the antenna 110 receives the first wireless signal SRX and generates an electrical signal SV to the voltage-controlled oscillator 130 accordingly, and the voltage-controlled oscillator 130 generates an oscillating signal SO to the processing unit 140 according to the electrical signal SV, and the oscillating signal SO is There will be information about the heartbeat, respiration, pulse or movement of the human body (that is, the parameters of the object under test 180 ). Afterwards, the processing unit 140 processes the oscillating signal SO to obtain information related to the heartbeat, respiration, pulse or movement of the human body, and the user evaluates his current physical condition based on the above information.

如此一来，本实施例的无线感测装置100不需如同已知生理信息感测器需要将反射后的信号与功率分配器输出端的另一路经由混频器及后续处理，因此可以避免测量零点，并可减少电路的使用、降低系统的复杂度以及功率消耗。In this way, the wireless sensing device 100 of this embodiment does not need to pass the reflected signal and the output end of the power divider through the mixer and subsequent processing like the known physiological information sensor, so the measurement zero point can be avoided , and can reduce circuit usage, system complexity and power consumption.

图2为图1的无线感测装置100的详细电路方块图。请参照图2，无线感测装置200包括天线210、220、放大器221、222、压控振荡器230与处理单元240。在本实施例中，天线210（例如接收天线）、220（例如发射天线）与压控振荡器230的实施方式可参照图1的天线110、120与压控振荡器130的说明，故在此不再赘述。FIG. 2 is a detailed circuit block diagram of the wireless sensing device 100 in FIG. 1 . Referring to FIG. 2 , the wireless sensing device 200 includes antennas 210 , 220 , amplifiers 221 , 222 , a voltage-controlled oscillator 230 and a processing unit 240 . In this embodiment, the implementation of the antenna 210 (such as a receiving antenna), 220 (such as a transmitting antenna) and the voltage-controlled oscillator 230 can refer to the description of the antenna 110, 120 and the voltage-controlled oscillator 130 in FIG. 1 , so here No longer.

放大器（例如低噪声放大器）221耦接于天线210与压控振荡器230之间，用于放大天线210所产生的电信号SV。放大器（例如功率放大器）222耦接于压控振荡器230与天线220之间，用以放大压控振荡器230所产生的振荡信号SO。The amplifier (such as a low noise amplifier) 221 is coupled between the antenna 210 and the voltage-controlled oscillator 230 for amplifying the electrical signal SV generated by the antenna 210 . The amplifier (such as a power amplifier) 222 is coupled between the voltage-controlled oscillator 230 and the antenna 220 for amplifying the oscillation signal SO generated by the voltage-controlled oscillator 230 .

处理单元240包括解调单元250与信号处理单元260。解调单元250耦接压控振荡器230，接收振荡信号SO，并将振荡信号SO解调为电压信号SVO。信号处理单元260耦接解调单元250，对电压信号SVO进行处理，以获得处理结果以及调整信号SJ，并将调整信号SJ传送至压控振荡器230，以便调整压控振荡器230产生的振荡信号SO的振荡频率。上述的处理结果即为待测物280的参数（例如人体的心跳、呼吸或脉搏等相关信息），因此使用者便可根据上述处理结果而得知自己的身体状况。The processing unit 240 includes a demodulation unit 250 and a signal processing unit 260 . The demodulation unit 250 is coupled to the voltage-controlled oscillator 230, receives the oscillating signal SO, and demodulates the oscillating signal SO into a voltage signal SVO. The signal processing unit 260 is coupled to the demodulation unit 250, and processes the voltage signal SVO to obtain a processing result and an adjustment signal SJ, and transmits the adjustment signal SJ to the voltage-controlled oscillator 230, so as to adjust the oscillation generated by the voltage-controlled oscillator 230 Oscillation frequency of signal SO. The above-mentioned processing result is the parameter of the object under test 280 (such as the heartbeat, respiration or pulse of the human body and other related information), so the user can know his physical condition according to the above-mentioned processing result.

另外，处理单元240还可包括低通滤波器270，低通滤波器270可耦接于解调单元250与信号处理单元260，以对电压信号SVO进行低通滤波，进而滤除电压信号SVO中的高频噪声。In addition, the processing unit 240 may further include a low-pass filter 270, which may be coupled to the demodulation unit 250 and the signal processing unit 260 to perform low-pass filtering on the voltage signal SVO, thereby filtering out the voltage signal SVO. of high-frequency noise.

此外，在本实施例中，解调单元250包括延迟器251与混频器252。延迟器251耦接压控振荡230，用以延迟振荡信号SO。混频器252耦接压控振荡器230与延迟器251，用以将振荡信号SO与延迟后的振荡信号SO进行混频，以进行频率解调，进而产生电压信号SVO。In addition, in this embodiment, the demodulation unit 250 includes a delayer 251 and a mixer 252 . The delayer 251 is coupled to the voltage-controlled oscillator 230 for delaying the oscillating signal SO. The mixer 252 is coupled to the voltage-controlled oscillator 230 and the delayer 251 for mixing the oscillating signal SO and the delayed oscillating signal SO to perform frequency demodulation, and then generate the voltage signal SVO.

信号处理单元260包括模拟数字转换器（analog-to-digital converter）261、数字信号处理器262、数字模拟转换器（digital-to-analog converter）263。模拟数字转换器261耦接解调单元250，用以将电压信号SVO进行模拟数字转换，以产生数字信号SD。数字信号处理器262耦接模拟数字转换单元261，用以对数字信号SD进行处理，以产生处理结果（亦即获得待测物280的参数）。另外，数字信号处理器262会控制数字调整信号SDJ，以决定压控振荡器230的输出频率。数字模拟转换器263耦接数字信号处理器262，用以将数字调整信号SDJ进行数字模拟转换，以产生调整信号SJ。之后，调整信号SJ会传送至压控振荡器230，以调整压控振荡器230所产生的振荡信号SO的振荡频率。The signal processing unit 260 includes an analog-to-digital converter (analog-to-digital converter) 261 , a digital signal processor 262 , and a digital-to-analog converter (digital-to-analog converter) 263 . The analog-to-digital converter 261 is coupled to the demodulation unit 250 for performing analog-to-digital conversion on the voltage signal SVO to generate a digital signal SD. The digital signal processor 262 is coupled to the analog-to-digital conversion unit 261 for processing the digital signal SD to generate a processing result (that is, to obtain parameters of the object under test 280 ). In addition, the digital signal processor 262 controls the digital adjustment signal SDJ to determine the output frequency of the voltage-controlled oscillator 230 . The digital-to-analog converter 263 is coupled to the digital signal processor 262 for digital-to-analog conversion of the digital adjustment signal SDJ to generate the adjustment signal SJ. Afterwards, the adjustment signal SJ is sent to the voltage-controlled oscillator 230 to adjust the oscillation frequency of the oscillation signal SO generated by the voltage-controlled oscillator 230 .

在上述无线感测装置100中，天线（发射天线）120耦接压控振荡器130，且压控振荡器130耦接天线（接收天线）110，因此，天线120所产生的第二无线信号STX的频率会随第一无线信号SRX的变动而变化，亦即，第二无线信号STX的频率会一直改变，但本发明不限于此。以下，将另举第二无线信号STX维持固定频率的例子。In the above wireless sensing device 100, the antenna (transmitting antenna) 120 is coupled to the voltage-controlled oscillator 130, and the voltage-controlled oscillator 130 is coupled to the antenna (receiving antenna) 110, therefore, the second wireless signal STX generated by the antenna 120 The frequency of will change with the change of the first wireless signal SRX, that is, the frequency of the second wireless signal STX will always change, but the present invention is not limited thereto. Hereinafter, another example in which the second wireless signal STX maintains a fixed frequency will be given.

图3为本发明的另一实施例的无线感测装置的方块图。请参照图3，无线信号感测装置300包括天线310（例如接收天线）、320（例如发射天线）、压控振荡器330、340与处理单元350。本实施例的天线310、压控振荡器330与处理单元350的实施方式可参照图1的天线110、压控振荡器130与处理单元140的说明，在此不再赘述。FIG. 3 is a block diagram of a wireless sensing device according to another embodiment of the present invention. Referring to FIG. 3 , the wireless signal sensing device 300 includes an antenna 310 (such as a receiving antenna), 320 (such as a transmitting antenna), voltage-controlled oscillators 330 , 340 and a processing unit 350 . The antenna 310 , the voltage-controlled oscillator 330 and the processing unit 350 of this embodiment may refer to the description of the antenna 110 , the voltage-controlled oscillator 130 and the processing unit 140 in FIG. 1 , and will not be repeated here.

在本实施例中，压控振荡器340可产生第二压控信号SO2。天线320耦接压控振荡器340，接收第二压控信号SO2，并据以产生第二无线信号STX至待测物380，使得待测物380反射第二无线信号STX而产生第一无线信号SRX。由于天线（发射天线）320依据压控振荡器340输出的第二振荡信号SO2来产生第二无线信号STX，而不是依据压控振荡器330输出的第一振荡信号SO1来产生第二无线信号STX，因此，图3的无线感测装置300与图1的无线感测装置100的差别在于，图3的第二无线信号STX可维持固定的频率，而图1的第二无线信号STX的频率为可变动的。但上述仅为第二无线信号STX的差异，但图3的无线感测装置300的实施方式与所达成的功效仍与图1的无线感测装置100相似，故在此不再赘述。In this embodiment, the voltage-controlled oscillator 340 can generate the second voltage-controlled signal SO2. The antenna 320 is coupled to the voltage-controlled oscillator 340, receives the second voltage-controlled signal SO2, and generates a second wireless signal STX to the object under test 380, so that the object under test 380 reflects the second wireless signal STX to generate the first wireless signal SRX. Since the antenna (transmitting antenna) 320 generates the second wireless signal STX according to the second oscillating signal SO2 output by the voltage-controlled oscillator 340 , instead of generating the second wireless signal STX according to the first oscillating signal SO1 output by the voltage-controlled oscillator 330 Therefore, the difference between the wireless sensing device 300 of FIG. 3 and the wireless sensing device 100 of FIG. 1 is that the second wireless signal STX of FIG. 3 can maintain a fixed frequency, while the frequency of the second wireless signal STX of FIG. 1 is variable. However, the above is only the difference of the second wireless signal STX, but the implementation and achieved effects of the wireless sensing device 300 in FIG. 3 are still similar to the wireless sensing device 100 in FIG. 1 , so details will not be repeated here.

上述图1、图2及图3的实施例是通过发射无线信号至待测物，并接收由待测物所反射的无线信号来感测并评估待测物的参数，但本发明不限于此。以下，另举一实施例来说明。The above-mentioned embodiments in FIG. 1 , FIG. 2 and FIG. 3 sense and evaluate the parameters of the DUT by transmitting wireless signals to the DUT and receiving the wireless signals reflected by the DUT, but the present invention is not limited thereto . Hereinafter, another embodiment will be given for illustration.

图4为根据本发明的又一实施例的无线感测装置的方块图。请参照图4，无线感测装置400包括光产生器410、光电转换器420、压控振荡器430与处理单元440。FIG. 4 is a block diagram of a wireless sensing device according to yet another embodiment of the present invention. Referring to FIG. 4 , the wireless sensing device 400 includes a light generator 410 , a photoelectric converter 420 , a voltage-controlled oscillator 430 and a processing unit 440 .

光源410产生第二光信号SL2至待测物480，而待测物480会反射第二光信号SL2而产生第一光信号SL1。光电转换器420接收第一光信号SL1，并据以产生电信号SV。在另一实施例中，光源410与光电转换器420可以一模块的方式制作，进而减少电路元件使用。The light source 410 generates the second light signal SL2 to the object under test 480, and the object under test 480 reflects the second light signal SL2 to generate the first light signal SL1. The photoelectric converter 420 receives the first optical signal SL1 and generates an electrical signal SV accordingly. In another embodiment, the light source 410 and the photoelectric converter 420 can be manufactured in a module, thereby reducing the use of circuit components.

压控振荡器430耦接该光电转换器420，在电信号SV的干扰下产生振荡信号SO，其中振荡信号SO随电信号SV的变动而变化。处理单元440耦接压控振荡器430，依据振荡信号SO的变化评估待测物480的运动参数（如速度、位移与作动频率）。The voltage-controlled oscillator 430 is coupled to the photoelectric converter 420 and generates an oscillating signal SO under the interference of the electrical signal SV, wherein the oscillating signal SO varies with the variation of the electrical signal SV. The processing unit 440 is coupled to the voltage-controlled oscillator 430 , and evaluates the motion parameters (such as speed, displacement and actuation frequency) of the object under test 480 according to the variation of the oscillation signal SO.

在本实施例中，第二光信号SL2与待测物480的相对运动也会产生多普勒效应，因此，通过待测物480反射第二光信号SL2而产生的第一光信号SL1具有不同的波长，且第一光信号SL1的波长也会不同于第二光信号SL2的波长。接着，光电转换器420会将接收到的第一光信号SL1转换成电信号SV，并传送至压控振荡器430。之后，压控振荡器430会依据电信号SV而产生振荡信号SO至处理单元440，而此振荡信号SO中会具有待测物480运动的信息。之后，处理单元440便会对振荡信号SO进行处理而获得待测物480运动的相关信息。In this embodiment, the relative motion between the second optical signal SL2 and the object under test 480 will also produce the Doppler effect, therefore, the first optical signal SL1 generated by reflecting the second optical signal SL2 from the object under test 480 has a different wavelength, and the wavelength of the first optical signal SL1 is also different from the wavelength of the second optical signal SL2. Next, the photoelectric converter 420 converts the received first optical signal SL1 into an electrical signal SV, and transmits it to the voltage-controlled oscillator 430 . Afterwards, the voltage-controlled oscillator 430 generates an oscillating signal SO to the processing unit 440 according to the electrical signal SV, and the oscillating signal SO contains information about the movement of the object under test 480 . Afterwards, the processing unit 440 processes the oscillating signal SO to obtain information about the movement of the object under test 480 .

如此一来，本实施例的无线感测装置400也可避免测量零点，且可减少电路元件的使用，进而达成减少制造成本以及功率消耗。In this way, the wireless sensing device 400 of this embodiment can also avoid measuring zero points, and can reduce the use of circuit components, thereby reducing manufacturing costs and power consumption.

综上所述，本发明的无线信号测量装置为非接触式感测装置，利用发射至待测物的第二无线信号（或第二光信号）受到呼吸、心跳、脉搏或动作（例如肢体动作）等扰动产生的多普勒效应，使得待测物反射第二无线信号（或第二光信号）而产生的第一无线信号（或第二光信号）具有对应于呼吸、心跳、脉搏或动作等的频率变化，并利用压控振荡器的自我注入锁定作用，使压控振荡器产生受到多普勒效应的振荡信号。之后，经由处理单元对振荡信号进行处理，进而获得待测物的参数（例如呼吸、心跳、脉搏或动作等相关信息）以进行评估。如此一来，相较于传统感测电路来说，本发明可有效地提高感测灵敏度及感测的正确性、可避免感测零点、减少电路元件使用、进而降低系统复杂度及功率损耗。To sum up, the wireless signal measurement device of the present invention is a non-contact sensing device, which uses the second wireless signal (or second optical signal) transmitted to the object to be detected by respiration, heartbeat, pulse or movement (such as body movement) ) and other disturbances, so that the first wireless signal (or second optical signal) generated by the object under test reflecting the second wireless signal (or second optical signal) has the corresponding respiration, heartbeat, pulse or movement and other frequency changes, and use the self-injection locking effect of the voltage-controlled oscillator to make the voltage-controlled oscillator generate an oscillating signal subject to the Doppler effect. Afterwards, the oscillating signal is processed through the processing unit to obtain parameters of the object under test (such as respiration, heartbeat, pulse or motion and other relevant information) for evaluation. In this way, compared with the traditional sensing circuit, the present invention can effectively improve sensing sensitivity and sensing accuracy, avoid sensing zero point, reduce the use of circuit components, and further reduce system complexity and power consumption.

虽然本发明已以实施例公开如上，然其并非用以限定本发明，本领域技术人员，在不脱离本发明的精神和范围内，当可作些许的更动与润饰，故本发明的保护范围当视所附权利要求书所界定者为准。Although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention, so the protection of the present invention The scope is to be determined as defined by the appended claims.