CN220896512U - Sensor power supply circuit with low power consumption - Google Patents
Sensor power supply circuit with low power consumption Download PDFInfo
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- CN220896512U CN220896512U CN202322455816.0U CN202322455816U CN220896512U CN 220896512 U CN220896512 U CN 220896512U CN 202322455816 U CN202322455816 U CN 202322455816U CN 220896512 U CN220896512 U CN 220896512U
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Abstract
The utility model discloses a low-power consumption sensor power supply circuit, which comprises: the sensor comprises a switch circuit, an amplifying circuit for amplifying data acquired by a sensor, a regulating circuit for outputting a waveform driving signal and a power supply circuit for supplying power to the sensor and the regulating circuit, wherein the switch circuit comprises a first on-off circuit for carrying out on-off regulation on a sensitive element of the sensor according to the waveform driving signal and a second on-off circuit for carrying out on-off regulation on a heating element of the sensor according to the waveform driving signal, and the regulating circuit can collect acquired data output by the amplifying circuit. The power supply circuit is used for realizing intermittent power supply to the sensor through the on-off of the first on-off circuit and the second on-off circuit, so that the traditional power supply mode of continuously supplying power to the sensor is changed, the continuous working time of the sensor is reduced, and the use power consumption of the sensor is reduced.
Description
Technical Field
The utility model relates to the technical field of power supply of gas sensors, in particular to a low-power consumption sensor power supply circuit.
Background
The semiconductor sensor has the advantages of high response speed, high resolution, low cost, good stability and the like, and is widely applied to gas detection equipment. In the use of the semiconductor sensor, it is necessary to supply power to the semiconductor sensor, but a general power supply circuit is directly connected with the semiconductor sensor and continuously supplies power to the semiconductor sensor, and the continuous power supply mode can cause that the semiconductor consumes a large amount of electric energy in the use process, so that the use power consumption of the semiconductor sensor is large, and in the use process of the device, particularly in the portable device using a battery, the use time of the device can be influenced by the power consumption of the semiconductor sensor. And the continuous power supply of the semiconductor sensor can increase the working time of the semiconductor sensor and the influence degree of the external temperature and the external humidity on the semiconductor sensor, so that the detection precision of the semiconductor sensor is reduced and the reliability of the product is low.
Disclosure of utility model
The utility model provides a low-power consumption sensor power supply circuit aiming at the defects in the prior art, which comprises: the sensor comprises a switch circuit, an amplifying circuit for amplifying data acquired by a sensor, a regulating circuit for outputting a waveform driving signal, and a power supply circuit for supplying power to the sensor and the regulating circuit, wherein the switch circuit comprises a first on-off circuit for carrying out on-off regulation on a sensitive element of the sensor according to the waveform driving signal and a second on-off circuit for carrying out on-off regulation on a heating element of the sensor according to the waveform driving signal, the regulating circuit can collect acquired data output by the amplifying circuit, the input end of the power supply circuit is connected with an external power supply, the first output end of the power supply circuit is connected with the power supply end of the regulating circuit, the second output end of the power supply circuit is connected with the power supply end of the sensitive element, the third output end of the regulating circuit is connected with the input end of the first on-off circuit, the second output end of the regulating circuit is connected with the input end of the second on-off circuit, the output end of the first on-off circuit is connected with the signal end of the sensitive element, and the output end of the second on-off circuit is connected with the signal end of the heating element, and the input end of the amplifying circuit is connected with the input end of the sensitive element.
Preferably, the power supply circuit comprises a first voltage stabilizing circuit for supplying power to the regulating circuit and a second voltage stabilizing circuit for supplying power to the sensor, wherein the input end of the first voltage stabilizing circuit is connected with an external power supply, the output end of the first voltage stabilizing circuit is connected with the input end of the second voltage stabilizing circuit, the first output end of the second voltage stabilizing circuit is connected with the power end of the sensitive element, and the second output end of the second voltage stabilizing circuit is connected with the power end of the heating element.
Preferably, the second voltage stabilizing circuit comprises a first voltage reducing circuit for supplying power to the sensitive element and a second voltage reducing circuit for supplying power to the heating element, wherein the input end of the first voltage reducing circuit and the input end of the second voltage reducing circuit are connected with the output end of the first voltage stabilizing circuit, the output end of the first voltage reducing circuit is connected with the power end of the sensitive element, and the output end of the second voltage reducing circuit is connected with the power end of the heating element.
Preferably, the first on-off circuit comprises a resistor R1, a resistor R2, a resistor R3 and a triode Q1, wherein a first output end of the regulating circuit is connected with one end of the resistor R1, the other end of the resistor R1 is grounded through the resistor R2 and is connected with a base electrode of the triode Q1, a collector electrode of the triode is connected with one end of the resistor R3, an emitter electrode of the triode is grounded, and the other end of the resistor R3 is connected with a signal end of the sensitive element.
Preferably, the second turn-off circuit includes a resistor R4, a resistor R5, and a triode Q2, where one end of the resistor R4 is connected to the second output end of the adjusting circuit, the other end is grounded through the resistor R5, a base electrode of the triode Q2 is connected to the other end of the resistor R4, a collector electrode is connected to the signal end of the heating element, and an emitter electrode is grounded.
Preferably, the amplifying circuit comprises an operational amplifier, a resistor R6, a resistor R7, a resistor R8 and a capacitor C1, wherein a first input end of the operational amplifier is connected with a signal end of the sensitive element, a second input end of the operational amplifier is grounded through the resistor R6, one end of the resistor R7 is connected with a second input end of the operational amplifier, an output end of the operational amplifier is respectively connected with the other end of the resistor R7 and one end of the resistor R8, the other end of the resistor R8 is grounded through the capacitor C1, and a first input end of the regulating circuit is connected with the other end of the resistor R8.
Preferably, the first voltage stabilizing circuit includes a voltage stabilizing chip, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5, an external power source is connected with a pin 1 of the voltage stabilizing chip, the pin 1 of the voltage stabilizing chip is grounded through the capacitor C2 and the capacitor C3 respectively, an input end of the first voltage reducing circuit and an input end of the second voltage reducing circuit are connected with a pin 2 of the voltage stabilizing chip, the pin 2 of the voltage stabilizing chip is grounded through the capacitor C4 and the capacitor C5 respectively, and the pin 3 of the voltage stabilizing chip is grounded.
Preferably, the first voltage reducing circuit comprises a first voltage reducing chip, a capacitor C6, a capacitor C7, a resistor R9, a resistor R10, a resistor R11 and a resistor R12, wherein the pin 2 of the voltage stabilizing chip is respectively connected with the pin 1 and the pin 3 of the first voltage reducing chip, one end of the capacitor C6 is connected with the pin 1 of the first voltage reducing chip, the other end of the capacitor C6 is connected with the pin 2 of the first voltage reducing chip, the pin 2 of the first voltage reducing chip is grounded, the power end of the sensitive element is connected with the pin 5 of the first voltage reducing chip, the pin 4 of the first voltage reducing chip is respectively connected with one end of the resistor R9 and one end of the resistor R12, the other end of the resistor R9 and the other end of the resistor R12 are grounded, the pin 5 of the first voltage reducing chip is grounded through the capacitor C7 and connected with one end of the resistor R10, the other end of the resistor R10 is connected with one end of the resistor R11, the other end of the resistor R11 is respectively connected with one end of the resistor R9 and one end of the resistor R12, the second voltage reducing circuit comprises a second voltage reducing chip, a capacitor C8, a capacitor C9, a resistor R13, a resistor R14, a resistor R15 and a resistor R16, wherein the pin 2 of the voltage stabilizing chip is respectively connected with the pin 1 and the pin 3 of the second voltage reducing chip, one end of the capacitor 8 is connected with the pin 1 of the second voltage reducing chip, the other end of the capacitor 8 is connected with the pin 2 of the second voltage reducing chip, the pin 2 of the second voltage reducing chip is grounded, the power end of the heating element is connected with the pin 5 of the second voltage reducing chip, the pin 4 of the second voltage reducing chip is respectively connected with one end of the resistor R13 and one end of the resistor R16, the other end of the resistor R13 and the other end of the resistor R16 are grounded, the pin 5 of the second voltage reducing chip is grounded through the capacitor C9 and connected with one end of the resistor R14, the other end of the resistor R14 is connected with one end of the resistor R15, the other end of the resistor R15 is respectively connected with one end of the resistor R13, and one end of the resistor R16 is connected.
Preferably, the regulating circuit adopts an STM32F103RGT6 chip, the voltage stabilizing chip adopts an MD7218D33 chip, and the first voltage reducing chip and the second voltage reducing chip both adopt SGM2059-ADJXN G/TR chips.
The utility model discloses a low-power consumption sensor power supply circuit, which comprises a first on-off circuit for carrying out on-off adjustment on a sensitive element of a sensor according to a waveform driving signal and a second on-off circuit for carrying out on-off adjustment on a heating element of the sensor according to the waveform driving signal, wherein when the sensor needs to work, the first on-off circuit and the second on-off circuit carry out on-off change through driving waves output by the adjusting circuit, and the power supply circuit carries out on-off change on the sensitive element through conduction of the first on-off circuit and carries out on-off on the heating element through conduction of the second on-off circuit, so that the power supply circuit realizes intermittent power supply on the sensor through driving waves output by the adjusting circuit, changes the traditional power supply mode of continuous power supply on the sensor, is beneficial to reducing the continuous working time of the sensor, reduces the using power consumption of the sensor, reduces the time and the degree of influence of external temperature and humidity of the sensitive element, reduces the detection error of the sensor during detection, and ensures the accuracy of the sensor detection.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
fig. 1 is a schematic block diagram of a low power consumption sensor power supply circuit according to an embodiment of the present utility model.
Fig. 2 is a schematic circuit diagram of a regulating circuit according to an embodiment of the utility model.
Fig. 3 is a schematic circuit diagram of a first on-off circuit according to an embodiment of the present utility model.
Fig. 4 is a circuit schematic diagram of a second break-off circuit according to an embodiment of the utility model.
Fig. 5 is a schematic circuit diagram of an amplifying circuit according to an embodiment of the present utility model.
Fig. 6 is a circuit schematic diagram of a first voltage stabilizing circuit according to an embodiment of the utility model.
Fig. 7 is a circuit schematic diagram of a first voltage step-down circuit according to an embodiment of the utility model.
Fig. 8 is a circuit schematic diagram of a second voltage step-down circuit according to an embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
As shown in fig. 1-8, in a low power consumption sensor power supply circuit, the sensor power supply circuit includes: the sensor comprises a switch circuit 1, an amplifying circuit 2 for amplifying data acquired by a sensor, a regulating circuit 3 for outputting a waveform driving signal and a power supply circuit 4 for supplying power to the sensor and the regulating circuit 3, wherein the switch circuit 1 comprises a first on-off circuit for carrying out on-off regulation on a sensitive element of the sensor according to the waveform driving signal and a second on-off circuit for carrying out on-off regulation on a heating element of the sensor according to the waveform driving signal, the regulating circuit 3 can collect acquired data output by the amplifying circuit 2, the input end of the power supply circuit 4 is connected with an external power supply, the first output end of the power supply circuit 4 is connected with the power supply end of the regulating circuit 3, the second output end is connected with the power supply end of the sensitive element, the third output end of the regulating circuit 4 is connected with the input end of the first on-off circuit, the second output end of the regulating circuit is connected with the input end of the second on-off circuit, the output end of the first on-off circuit is connected with the signal end of the sensitive element, the output end of the second on-off circuit is connected with the signal end of the heating element, and the output end of the amplifying circuit 2 is connected with the input end of the amplifying circuit 4. When the sensor needs to work, the second output end of the regulating circuit outputs PWM waves for conducting the first on-off circuit, the first on-off circuit can conduct the sensitive element through PWM wave form change output by the second output end of the regulating circuit, when the first on-off circuit is conducted, the power supply circuit can supply power for the sensitive element, the second output end can output PWM waves for conducting the second on-off circuit, when the second on-off circuit is conducted, the power supply circuit can supply power for the heating element through PWM wave form change output by the four three output ends of the regulating circuit, compared with the traditional mode of continuously supplying power for the sensor, the power supply circuit can output PWM waves matched with the sensitive element and the heating element to enable the power supply circuit to supply power for the sensitive element and the heating element only when the sensitive element and the heating element work, so that the power supply quantity of the power supply circuit is reduced, and low power consumption of the sensor is realized.
In this embodiment, the power supply circuit includes a first voltage stabilizing circuit for supplying power to the adjusting circuit, and a second voltage stabilizing circuit for supplying power to the sensor, where an input end of the first voltage stabilizing circuit is connected to an external power supply, an output end of the first voltage stabilizing circuit is connected to an input end of the second voltage stabilizing circuit, a first output end of the second voltage stabilizing circuit is connected to a power end of the sensing element, and a second output end of the second voltage stabilizing circuit is connected to a power end of the heating element. The second voltage stabilizing circuit comprises a first voltage reducing circuit for supplying power to the sensitive element and a second voltage reducing circuit for supplying power to the heating element, wherein the input end of the first voltage reducing circuit and the input end of the second voltage reducing circuit are connected with the output end of the first voltage stabilizing circuit, the output end of the first voltage reducing circuit is connected with the power end of the sensitive element, and the output end of the second voltage reducing circuit is connected with the power end of the heating element.
In this embodiment, the adjusting circuit adopts the STM32F103RGT6 chip, the first on-off circuit includes a resistor R1, a resistor R2, a resistor R3 and a triode Q1, the first output end of the adjusting circuit is connected with one end of the resistor R1, the other end of the resistor R1 is grounded through the resistor R2 and is connected with the base of the triode Q1, the collector of the triode is connected with one end of the resistor R3, the emitter is grounded, the other end of the resistor R3 is connected with the signal end of the sensing element, the first on-off circuit is used as a conducting switch of the sensing element, when the sensor needs to work, the second output end of the adjusting circuit outputs a PWM wave for adjusting the on-off of the first on-off circuit, the PWM wave can conduct the triode Q1 when the output is in a high level, and the triode Q1 can realize the conduction of power supply to the sensing element after the conduction, thereby realizing the power supply operation of the first voltage reducing circuit to the sensing element. The second break-make circuit comprises a resistor R4, a resistor R5 and a triode Q2, one end of the resistor R4 is connected with the second output end of the regulating circuit, the other end of the resistor R4 is grounded through the resistor R5, the base electrode of the triode Q2 is connected with the other end of the resistor R4, the collector electrode of the triode Q2 is connected with the signal end of the heating element, and the emitter electrode of the triode Q2 is grounded, the second break-make circuit is used as a conducting switch of the heating element, when the sensor needs to work, the third output end of the regulating circuit can output PWM waves for regulating the on-off state of the second break-make circuit, the PWM waves can conduct the triode Q2 when the output is in a high level, the triode Q2 can realize the power supply conduction of the heating element after the triode Q2 is conducted, and therefore the second step-down circuit can realize the power supply operation of the heating element.
In this embodiment, the period of the PWM wave output from the second output end of the adjusting circuit is 30s, the first on-off circuit may be turned on at the initial time of 0.098-0.1s, the period of the PWM wave output from the third output end of the adjusting circuit is 30s, the second on-off circuit may be turned on at the initial time of 0-0.1s, and the power supply of the sensor is adjusted by the PWM wave of the adjusting circuit, so that the power supply circuit only supplies power to the sensor when the sensor needs to work. PWM waves output by the second output end of the regulating circuit and PWM waves output by the third output end are output at the same starting time, so that the conduction time of the sensing element is ensured to be within the conduction time of the heating resistor, namely, the sensing element and the heating element are simultaneously conducted within 0.098s, at the moment, the amplifying circuit can conduct data acquisition on the sensing element within 2ms, and the use power consumption of the sensor during use detection is reduced.
In this embodiment, the amplifying circuit includes an operational amplifier, a resistor R6, a resistor R7, a resistor R8 and a capacitor C1, where a first input end of the operational amplifier is connected to a signal end of the sensing element, a second input end of the operational amplifier is grounded through the resistor R6, one end of the resistor R7 is connected to a second input end of the operational amplifier, an output end of the operational amplifier is connected to the other end of the resistor R7 and one end of the resistor R8, the other end of the resistor R8 is grounded through the capacitor C1, and a first input end of the adjusting circuit is connected to the other end of the resistor R8. When the sensitive element and the heating element are in the power-on state together, the amplifying circuit performs data acquisition on the sensitive element, and compared with the traditional uninterrupted continuous acquisition, the intermittent acquisition mode can reduce the use power consumption in the use process of the sensor and improve the reliability of the product.
In this embodiment, the first voltage stabilizing circuit includes a voltage stabilizing chip, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5, the voltage stabilizing chip uses an MD7218D33 chip, an external power source is connected to a pin 1 of the voltage stabilizing chip, the pin 1 of the voltage stabilizing chip is grounded through the capacitor C2 and the capacitor C3, an input end of the first voltage reducing circuit and an input end of the second voltage reducing circuit are both connected to the pin 2 of the voltage stabilizing chip, the pin 2 of the voltage stabilizing chip is grounded through the capacitor C4 and the capacitor C5, the pin 3 of the voltage stabilizing chip is grounded, and the first voltage stabilizing circuit can reduce an external voltage to a voltage level according with a power supply requirement of the regulating circuit and can provide a stable voltage supply for the regulating circuit through a voltage stabilizing output.
In this embodiment, the first voltage reducing circuit includes a first voltage reducing chip, a capacitor C6, a capacitor C7, a resistor R9, a resistor R10, a resistor R11, and a resistor R12, where the pin 2 of the voltage stabilizing chip is connected to the pins 1 and 3 of the first voltage reducing chip, one end of the capacitor C6 is connected to the pin 1 of the first voltage reducing chip, the other end is connected to the pin 2 of the first voltage reducing chip, the pin 2 of the first voltage reducing chip is grounded, the power end of the sensing element is connected to the pin 5 of the first voltage reducing chip, the pin 4 of the first voltage reducing chip is connected to one end of the resistor R9 and one end of the resistor R12, the other end of the resistor R9 and the other end of the resistor R12 are grounded, the pin 5 of the first voltage reducing chip is grounded through the capacitor C7 and connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the resistor R9 and one end of the resistor R12, the second voltage reducing circuit comprises a second voltage reducing chip, a capacitor C8, a capacitor C9, a resistor R13, a resistor R14, a resistor R15 and a resistor R16, wherein the pin 2 of the voltage stabilizing chip is respectively connected with the pin 1 and the pin 3 of the second voltage reducing chip, one end of the capacitor 8 is connected with the pin 1 of the second voltage reducing chip, the other end of the capacitor 8 is connected with the pin 2 of the second voltage reducing chip, the pin 2 of the second voltage reducing chip is grounded, the power end of the heating element is connected with the pin 5 of the second voltage reducing chip, the pin 4 of the second voltage reducing chip is respectively connected with one end of the resistor R13 and one end of the resistor R16, the other end of the resistor R13 and the other end of the resistor R16 are grounded, the pin 5 of the second voltage reducing chip is grounded through the capacitor C9 and connected with one end of the resistor R14, the other end of the resistor R14 is connected with one end of the resistor R15, the other end of the resistor R15 is respectively connected with one end of the resistor R13, and one end of the resistor R16 is connected. The first voltage reduction chip and the second voltage reduction chip both adopt SGM2059-ADJXN G/TR chips, and the arrangement of the first voltage reduction circuit and the second voltage reduction circuit can provide adaptive voltage for the sensitive element and the heating element, so that the reliability of the product in use is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
In summary, the foregoing description is only of the preferred embodiments of the present utility model, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the utility model.
Claims (9)
1. A low power consumption sensor power supply circuit, comprising: the sensor comprises a switch circuit, an amplifying circuit for amplifying data acquired by a sensor, a regulating circuit for outputting a waveform driving signal and a power supply circuit for supplying power to the sensor and the regulating circuit, wherein the switch circuit comprises a first on-off circuit for carrying out on-off regulation on a sensitive element of the sensor according to the waveform driving signal and a second on-off circuit for carrying out on-off regulation on a heating element of the sensor according to the waveform driving signal, and the regulating circuit can collect acquired data output by the amplifying circuit;
The input end of the power supply circuit is connected with an external power supply, the first output end of the power supply circuit is connected with the power supply end of the regulating circuit, the second output end of the power supply circuit is connected with the power supply end of the sensitive element, the third output end of the power supply circuit is connected with the power supply end of the heating element, the first output end of the regulating circuit is connected with the input end of the first on-off circuit, the second output end of the regulating circuit is connected with the input end of the second on-off circuit, the output end of the first on-off circuit is connected with the signal end of the sensitive element, the output end of the second on-off circuit is connected with the signal end of the heating element, and the input end of the amplifying circuit is connected with the signal end of the sensitive element and the input end of the regulating circuit.
2. The low power consumption sensor power supply circuit of claim 1, wherein: the power supply circuit comprises a first voltage stabilizing circuit for supplying power to the regulating circuit and a second voltage stabilizing circuit for supplying power to the sensor, wherein the input end of the first voltage stabilizing circuit is connected with an external power supply, the output end of the first voltage stabilizing circuit is connected with the input end of the second voltage stabilizing circuit, the first output end of the second voltage stabilizing circuit is connected with the power end of the sensitive element, and the second output end of the second voltage stabilizing circuit is connected with the power end of the heating element.
3. The low power consumption sensor power supply circuit of claim 2, wherein: the second voltage stabilizing circuit comprises a first voltage reducing circuit for supplying power to the sensitive element and a second voltage reducing circuit for supplying power to the heating element, wherein the input end of the first voltage reducing circuit and the input end of the second voltage reducing circuit are connected with the output end of the first voltage stabilizing circuit, the output end of the first voltage reducing circuit is connected with the power end of the sensitive element, and the output end of the second voltage reducing circuit is connected with the power end of the heating element.
4. A low power consumption sensor power supply circuit according to claim 3, characterized in that: the first on-off circuit comprises a resistor R1, a resistor R2, a resistor R3 and a triode Q1, wherein a first output end of the regulating circuit is connected with one end of the resistor R1, the other end of the resistor R1 is grounded through the resistor R2 and is connected with a base electrode of the triode Q1, a collector electrode of the triode is connected with one end of the resistor R3, an emitter electrode of the triode is grounded, and the other end of the resistor R3 is connected with a signal end of the sensitive element.
5. The low power consumption sensor power supply circuit of claim 4, wherein: the second switching-off circuit comprises a resistor R4, a resistor R5 and a triode Q2, one end of the resistor R4 is connected with the second output end of the regulating circuit, the other end of the resistor R4 is grounded through the resistor R5, the base electrode of the triode Q2 is connected with the other end of the resistor R4, the collector electrode is connected with the signal end of the heating element, and the emitter electrode is grounded.
6. The low power consumption sensor power supply circuit of claim 5, wherein: the amplifying circuit comprises an operational amplifier, a resistor R6, a resistor R7, a resistor R8 and a capacitor C1, wherein a first input end of the operational amplifier is connected with a signal end of a sensitive element, a second input end of the operational amplifier is grounded through the resistor R6, one end of the resistor R7 is connected with a second input end of the operational amplifier, an output end of the operational amplifier is respectively connected with the other end of the resistor R7 and one end of the resistor R8, the other end of the resistor R8 is grounded through the capacitor C1, and a first input end of the regulating circuit is connected with the other end of the resistor R8.
7. The low power consumption sensor power supply circuit of claim 6, wherein: the first voltage stabilizing circuit comprises a voltage stabilizing chip, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5, an external power supply is connected with a pin 1 of the voltage stabilizing chip, the pin 1 of the voltage stabilizing chip is grounded through the capacitor C2 and the capacitor C3 respectively, the input end of the first voltage reducing circuit and the input end of the second voltage reducing circuit are connected with the pin 2 of the voltage stabilizing chip, the pin 2 of the voltage stabilizing chip is grounded through the capacitor C4 and the capacitor C5 respectively, and the pin 3 of the voltage stabilizing chip is grounded.
8. The low power consumption sensor power supply circuit of claim 7, wherein: the first voltage reduction circuit comprises a first voltage reduction chip, a capacitor C6, a capacitor C7, a resistor R9, a resistor R10, a resistor R11 and a resistor R12, wherein the pin 2 of the voltage stabilization chip is respectively connected with the pin 1 and the pin 3 of the first voltage reduction chip, one end of the capacitor C6 is connected with the pin 1 of the first voltage reduction chip, the other end of the capacitor C6 is connected with the pin 2 of the first voltage reduction chip, the pin 2 of the first voltage reduction chip is grounded, the power end of the sensitive element is connected with the pin 5 of the first voltage reduction chip, the pin 4 of the first voltage reduction chip is respectively connected with one end of the resistor R9 and one end of the resistor R12, the other end of the resistor R9 and the other end of the resistor R12 are grounded, the pin 5 of the first voltage reduction chip is grounded through the capacitor C7 and connected with one end of the resistor R10, and the other end of the resistor R10 is connected with one end of the resistor R11, and the other end of the resistor R11 is respectively connected with one end of the resistor R9 and one end of the resistor R12;
The second voltage reduction circuit comprises a second voltage reduction chip, a capacitor C8, a capacitor C9, a resistor R13, a resistor R14, a resistor R15 and a resistor R16, wherein the pin 2 of the voltage stabilization chip is respectively connected with the pin 1 and the pin 3 of the second voltage reduction chip, one end of the capacitor 8 is connected with the pin 1 of the second voltage reduction chip, the other end of the capacitor 8 is connected with the pin 2 of the second voltage reduction chip, the pin 2 of the second voltage reduction chip is grounded, the power end of the heating element is connected with the pin 5 of the second voltage reduction chip, the pin 4 of the second voltage reduction chip is respectively connected with one end of the resistor R13 and one end of the resistor R16, the other end of the resistor R13 and the other end of the resistor R16 are grounded, the pin 5 of the second voltage reduction chip is grounded through the capacitor C9 and connected with one end of the resistor R14, the other end of the resistor R14 is connected with one end of the resistor R15, and the other end of the resistor R15 is respectively connected with one end of the resistor R13 and one end of the resistor R16.
9. The low power consumption sensor power supply circuit of claim 8, wherein: the regulating circuit adopts an STM32F103RGT6 chip, the voltage stabilizing chip adopts an MD7218D33 chip, and the first voltage reducing chip and the second voltage reducing chip both adopt SGM2059-ADJXN G/TR chips.
Priority Applications (1)
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