CN111800919A - Bridge detection lighting and charging dual-mode charging lamp - Google Patents

The invention discloses a dual-mode charging lamp for bridge detection illumination and charging, which comprises a charging lamp circuit, wherein the charging lamp circuit is connected with an external switch and a power supply in series; the charging lamp circuit comprises a first resistor, a fourth resistor, a first diode, a first triode, a first capacitor, a lighting lamp, a first voltage comparator, a battery and a transformer charging module, wherein the battery is mutually connected in series with an external switch and a power supply through the transformer charging module, the positive pole and the negative pole of the battery are respectively connected with the third resistor and the fourth resistor, and are connected with the negative pole of the first voltage comparator through the third resistor and the fourth resistor. The voltage comparator end of the invention compares the voltage value in the line to realize the turn-off of the illuminating lamp, thereby playing the role of automatically turning off the protective battery; the dual-voltage comparator can realize that the charging state is achieved when commercial power is available, and the charging state is achieved when the commercial power is unavailable, so that the charging is achieved when the power is supplied, and the energy is saved; the output closing switch is additionally arranged on the battery, so that the battery of the charging lamp can be stored for a long time, and damage is avoided.

Bridge detection lighting and charging dual-mode charging lamp

Technical Field

The invention belongs to the technical field of charging lamps, and particularly relates to a bridge detection lighting and charging dual-mode charging lamp.

Background

The mains supply line is affected by aging, moisture and the like, and a current leakage phenomenon can be generated. When the electric leakage is serious, the 2 end of the circuit has a resistance value of tens of kilohms; some switches are provided with parallel indicator lamps, and are also connected with a resistor in parallel. Switch control's charging lamp in the existing market, ageing at the circuit, on the circuit that wets and take the switch pilot lamp, the malfunctioning phenomenon of switch has all appeared, and the leakage resistance on reason control switch and the circuit is in conducting state forever, and the switch is inoperable, leads to the unable use of product, and market acceptance is low.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a dual-mode charging lamp for bridge detection lighting and charging, wherein a voltage comparator end compares voltage values in a line to realize lighting lamp closing, so that a protection battery is automatically closed; and the double voltage comparators can realize that the battery enters a charging state when commercial power exists and enters charging when the commercial power does not exist and waits for the incoming call in the charging state, thereby saving energy.

The technique and method adopted by the present invention to solve the above problems are as follows:

a dual-mode charging lamp with bridge detection illumination and charging comprises a charging lamp circuit, a charging lamp control circuit and a charging control circuit, wherein the charging lamp circuit is connected with an external switch and a power supply in series;

the charging lamp circuit comprises a first resistor, a fourth resistor, a first diode, a first triode, a first capacitor, a lighting lamp, a first voltage comparator, a battery and a transformer charging module, wherein the battery is connected with an external switch and a power supply in series through the transformer charging module, the positive pole and the negative pole of the battery are respectively connected with the third resistor and the fourth resistor and are connected with the negative pole of the first voltage comparator through the third resistor and the fourth resistor, the positive pole of the first voltage comparator is connected with the power supply through the first diode and the first resistor, the first voltage comparator is connected with the base electrode of the first triode, the positive pole of the battery is connected with the collector electrode of the first triode through the lighting lamp, the emitter electrode of the first triode is connected with the positive pole of the first voltage comparator through the second resistor, and the first capacitor is connected between the positive pole of the first voltage comparator and the negative pole of the battery in series.

Furthermore, the anode and the cathode of the battery are respectively connected with a third resistor and a fourth resistor, and are connected with the cathode of a first voltage comparator through the third resistor and the fourth resistor, the cathode of the first voltage comparator is connected with an external switch and a power supply in series through a first diode and the first resistor, and a second resistor and a first capacitor are respectively connected between the cathode of the first voltage comparator and the anode and the cathode of the battery in series.

Furthermore, the charging lamp circuit also comprises a fifth resistor, a ninth resistor, a second voltage comparator, a second capacitor, a second diode, a third diode and a charging indicator lamp, wherein the anode of the second voltage comparator is respectively connected with the anode and the cathode of the battery through the third resistor and the fourth resistor, the cathode of the second voltage comparator is connected with an external switch and a power supply in series through the fifth resistor, the first diode and the first resistor, and the charging indicator lamp and a seventh resistor are connected between the second voltage comparator and the cathode of the battery; the lamp comprises a first triode, a second triode, a third diode, a second capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a fourth resistor, a fifth resistor, a sixth resistor, a fourth resistor, a sixth resistor, a fifth resistor, a sixth resistor.

Further, the charging lamp circuit further comprises a tenth resistor, an eleventh resistor, a fourth diode and a second triode, wherein the anodes of the first voltage comparator and the second voltage comparator are connected with the third resistor to the collector of the second triode, the cathode of the first voltage comparator is connected with the sixth resistor and the second resistor to the collector of the second triode, the cathode of the second voltage comparator is connected with the fifth resistor and the second resistor to the collector of the second triode, the anode of the battery is connected with the emitter of the second triode, the anode of the battery is connected with the base of the second triode in series through the eleventh resistor, and the base of the second triode is connected with the fourth diode and the tenth resistor to an external switching circuit.

Furthermore, the transformer charging module adopts a low-voltage non-starting transformer isolation battery charging module.

The voltage in the circuit is compared through the voltage comparator, when the voltage is reduced to be lower than the voltage at the end of the voltage comparator, the illuminating lamp is turned off, the function of automatically turning off the protective battery is achieved, the charging state (the illuminating lamp is not on) can be achieved through the double voltage comparators, the charging can be started when the mains supply is available, the charging can be started when the mains supply is unavailable, the lamp is not needed to be started for waiting for charging, the battery is charged when the mains supply is available, and the energy is saved; the output closing switch is additionally arranged on the battery, when the charging lamp is not installed in a mains supply line, no loop exists, the output closing switch is not conducted, the power supply of the comparator and the loop is disconnected, the energy consumption of the charging lamp during storage and the disconnection of the mains supply switch is reduced to zero, and the battery of the charging lamp can be stored for a long time to avoid damage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;

fig. 1 is a schematic diagram of the circuit principle structure of the present invention.

fig. 5 is a schematic circuit structure diagram according to embodiment 4 of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will make the scope of the invention more clearly and unequivocally defined;

as shown in fig. 1, the method for detecting the balance of the bridge in the dual-mode charging lamp with bridge detection for illumination and charging according to the technical solution of the present invention has a large external leakage, and the external switch K can still reliably control the illumination and the turn-off of the charging lamp under the condition of a low resistance value.

The working principle is as follows: the third resistor R3 and the fourth resistor R4 divide the voltage to provide a reference voltage to the negative terminal of the voltage comparator, for example, the third resistor R3= the fourth resistor R4, the voltage is 1/2V of the power supply, the positive terminal of the comparator is RX when the external switch is turned off, the RX1 forms a parallel resistance value plus the first resistor R1 and the second resistor R2 divide the voltage, the switch is turned off and divides the voltage of the resistor at the output terminal of the mains transformer plus the first resistor R1 and the second resistor R2, when the voltage entering the positive terminal of the comparator is higher than the voltage at the negative terminal of the comparator, the comparator outputs a high voltage, and the triode is turned on to start the lighting circuit.

Assuming that the power supply is 4.2V, the voltage at the negative terminal of the comparator is 2.1V, assuming that R2 has a resistance of 150K Ω, and R1 has a resistance of 149K Ω, when the switch is closed (the internal resistance of the output winding of the power transformer is very low, and can be calculated as 0 Ω on the wire), it is equivalent to direct voltage division of the first resistor R1 and the second resistor R2, the voltage division is = U/(R1 + R2) × R2, the data is substituted with 4.2/(150 + 149) × 150=2.107V, the ordinary comparator such as LM is searched, the minimum offset voltage is 2mV, when the switch is closed, the voltage difference at the terminal of the second voltage comparator is 0.07V =2.107-2.1, the voltage difference is 7mV, the voltage at the positive terminal exceeds 7mV, the comparator outputs a high potential, the triode is turned on, and the illumination lamp is lighted.

When the switch is turned off, RX1 forms a parallel resistance value plus R1 and R2 voltage division, the voltage of the positive terminal of the comparator must be higher than the middle voltage, the lamp will be turned on, otherwise the lamp will be turned off, then RX, RX1 forms a parallel resistance value plus R1 must be smaller than R2, R2-R1=1K Ω, RX1 forms a parallel resistance value must be smaller than 1K Ω, we analyze the resistance value of RX1, conventionally the resistance value of the parallel connection on the switch will not be smaller than 100K Ω, when the resistance value is too low, the switch can not be turned off, the resistance value of the parallel connection on the switch is very large, therefore, when comparing with the resistance value of 1K Ω, we can ignore, and if the resistance value of RX on the line is 1K ohm, we first calculate the lower leakage current I = U/R, I =220/1K =220mA, calculate the power consumed under leakage P = U =220 = W = 4848 mW, the leakage protector has the advantages that the leakage protector is higher in power consumption than a common electric soldering iron, the power consumption already reaches the level of heating a line and tripping the leakage protector (the leakage action current of the relevant standard leakage protector is 6-30 mA), and the lowest resistance value of the leakage protector which does not work is R = U/I =220/30=7.37K omega according to the maximum allowable leakage current, so that the leakage resistance of a mains line is not lower than 7.3K omega. The allowable leakage resistance of the circuit is obviously lower than 7.3K omega by adopting bridge detection, so the circuit can be applied to various environment circuits, and the product can be widely applied to remove obstacles.

Example 1:

as shown in fig. 2, a bridge detection illumination and charging dual mode charging lamp includes a charging lamp circuit a connected in series with an external switch K and a power source AC;

the charging lamp circuit A comprises a first resistor R1-a fourth resistor R4, a first diode D1, a first triode Q1, a first capacitor C1, a lighting lamp LED, a first voltage comparator, a battery and a transformer charging module B, wherein the battery is mutually connected with an external switch K and a power supply AC in series through the transformer charging module B, the positive pole and the negative pole of the battery are respectively connected with the third resistor R3 and the fourth resistor R4, and the third resistor R3 and the fourth resistor R4 are connected with the negative pole of a first voltage comparator, the positive pole of the first voltage comparator is connected with a power supply AC through a first diode D1 and a first resistor R1, the first voltage comparator is connected with the base of a first triode Q1, the positive pole of a battery is connected with the collector of the first triode Q1 through a lighting lamp LED, the emitter of the first triode Q1 is connected with the positive pole of the first voltage comparator through a second resistor R2, and a first capacitor C1 is connected between the positive pole of the first voltage comparator and the negative pole of the battery in series.

The working principle is as follows: after the switch K is closed, current passes through the first resistor R1, the first diode D1 enters the second resistor R2, the positive end of the comparator rises to exceed the negative end, the comparator outputs high voltage, the bulb is lightened, when the switch is opened, the voltage on the second resistor R2 drops, the comparator outputs low potential, and the bulb is closed.

When the switch K is closed and alternating current is used, the unidirectional conduction of the first diode D1 can reduce the power consumption of the first resistor R1 and save energy; the first diode D1 only does emergency work when using the battery energy, because the voltage drop of the first diode D1 is not changed, when the battery voltage drops, the voltage on the second resistor R2 can be reduced due to the voltage division of the first resistor R1 and the second resistor R2, when the voltage drops to be lower than the voltage of the negative end of the comparator, the comparator outputs low voltage, the LED lamp is turned off, and the LED lamp plays a role in automatically turning off and protecting the battery; the first capacitor C1 acts as ac filtering and interference rejection.

Example 3:

charging lamp with charging and lighting function conversion: the switch K is switched on for the first time to light the illuminating lamp, and is switched off and then is switched on again to turn the charging indicator lamp on, and the illuminating lamp is turned off;

as shown in fig. 4, a dual-mode charging lamp for bridge detection lighting and charging, the charging lamp circuit a further includes a fifth resistor R5-a ninth resistor R9, a second voltage comparator, a second capacitor C2, a second diode D2, a third diode D3 and a charging indicator LED1, the anode of the second voltage comparator is connected to the anode and the cathode of the battery through a third resistor R3 and a fourth resistor R4, the cathode of the second voltage comparator is connected in series to the external switch K and the power supply AC through a fifth resistor R5, a first diode D1 and a first resistor R1, and a charging indicator LED1 and a seventh resistor R7 are connected between the second voltage comparator and the cathode of the battery; a third diode D3 is connected between the negative electrodes of the second voltage comparator and the first voltage comparator, a second diode D2 is connected in series between the negative electrodes of the first voltage comparator and the second voltage comparator, and a second capacitor C2 is connected in parallel, an eighth resistor R8 is connected between the base electrodes of the first voltage comparator and the first triode Q1, a sixth resistor R6 is connected in series between the negative electrode of the first voltage comparator and the second resistor R2 as well as the first capacitor C1, and a ninth resistor R9 is connected between the negative electrode of the illuminating lamp LED and the collector electrode of the first triode Q1.

The working principle is as follows: after the switch K is closed, the voltage divided by the second resistor R2, the first resistor R1 and the first diode D1 enters the comparator through the fifth resistor R5 and the sixth resistor R6, and when the divided voltage is lower than the divided voltage of the third resistor R3 and the fourth resistor R4, the voltage of the second capacitor C2 cannot change suddenly, and the negative terminal of the second voltage comparator maintains a high potential and outputs a voltage of 0; the negative end of the first voltage comparator is lower than the voltage division of the third resistor R3 and the fourth resistor R4, and the voltage is converted into output high potential to drive the triode to light the illuminating lamp. The high voltage output from the first voltage comparator is applied to the negative terminal of the second voltage comparator through the second diode D2, so that the output of the second voltage comparator is continuously maintained at the low voltage.

When the switch K is switched off, the divided voltage rises, the high voltage on the sixth resistor R6 enables the output of the first voltage comparator to be low potential, the illuminating lamp is turned off, the low potential output by the first voltage comparator enables the negative terminal of the second voltage comparator to be low potential through the second capacitor C2, the switch is switched on again within the charging time constant of the fifth resistor R5 and the second capacitor C2, the negative terminal of the second voltage comparator can be kept at low potential continuously, then the second voltage comparator can output high level, the third diode D3 provides high level for the negative terminal of the first voltage comparator, the output of the first voltage comparator is 0 continuously, at this time, the illuminating lamp can be switched off when the switch is switched on, the second voltage comparator outputs high level and simultaneously lights up the charging indicator lamp, the illuminating lamp is not on in a charging state when commercial power exists, the commercial power can be charged in a charging state when the commercial power does not exist and waits for incoming call, and the lamp does not need to be turned on for waiting for charging, and the battery does not need to be turned on for charging when the commercial power exists, so that the energy is saved.

When switch K disconnection, the high potential all appears in fifth resistance R5, sixth resistance R6, and the high potential all appears in first voltage comparator and second voltage comparator's negative terminal, and 2 comparators are all exported and are 0, and charge lamp pilot lamp and light are not bright, are in the off-state.

Example 4:

the positive electrodes of the first voltage comparator and the second voltage comparator are connected with a third resistor R3 to the collector of a second triode Q2, the negative electrode of the first voltage comparator is connected with a sixth resistor R6 and a second resistor R2 to the collector of the second triode Q2, the negative electrode of the second voltage comparator is connected with a fifth resistor R5 and a second resistor R2 to the collector of the second triode Q2, the positive electrode of the battery is connected with the emitter of the second triode Q2, the positive electrode of the battery is connected with the base of the second triode Q2 in series through an eleventh resistor R11, and the base of the second triode Q2 is connected with a fourth diode D4 and a tenth resistor R10 to an external switching circuit.

When the charging lamp is not installed in a mains supply line, the tenth resistor R10, the eleventh resistor R10 and the fourth diode D4 have no loop, the second triode Q2 is non-conductive, and the power supply of the comparator and the loop is disconnected, so that the energy consumption of the charging lamp during storage and the disconnection of the mains supply switch is reduced to 0, and the battery of the charging lamp can be stored for a long time so as not to be damaged.

The above description is only for the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of by the inventive labor should be covered within the protection scope of the present invention, and therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.