Power supply circuit based on power consumption monitoring and noise suppression

Abstract

The invention relates to a power circuit based on power consumption monitoring and noise suppression, and the circuit comprises a power input protection circuit which is used for carrying out the overcurrent and overvoltage protection of a power supply, and obtaining an overcurrent and overvoltage protection signal; the integrated noise suppression circuit is used for carrying out noise suppression on the overcurrent and overvoltage protection signal to obtain a noise suppression signal; the power consumption detection circuit is used for performing power consumption detection on the noise suppression signal to obtain a power supply signal and a power consumption detection signal; the DC-DC conversion circuit is used for performing DC-DC conversion on the power supply signal to obtain a power supply signal so as to supply power to a post-stage circuit; and the main controller is used for acquiring the power consumption detection signal in real time and protecting a post-stage circuit according to the power consumption detection signal. According to the invention, the normal imaging of the standard uncooled infrared detector can be realized, the stable imaging effect can be achieved, and the imaging quality and stability of the standard uncooled infrared detector can be improved.

Description

Technical Field

[0001] The present invention relates to the field of power supply circuits, and in particular to a power supply circuit based on power consumption monitoring and noise suppression. Background Art

[0002] In recent years, uncooled infrared detectors have been widely used. Standard uncooled infrared detectors can observe the infrared field of view to display living targets through optical components, and provide users with infrared imaging information of living targets under poor visual conditions. It is required that standard uncooled infrared detectors can quickly reach working conditions and maintain stable working conditions.

[0003] Since the movement components in the standard uncooled infrared detector have certain conditions for the dependence on power supply conditions, how to make the standard uncooled infrared detector work normally in an environment with poor power supply network and strong external interference has become one of the important methods to solve the problem of "the standard uncooled infrared detector has certain conditions for the dependence on power supply conditions". At the same time, the stable operation of the standard uncooled infrared detector requires the power quality to be within a certain working range. If the standard uncooled infrared detector cannot work within the normal working range, it will cause the imaging effect to introduce various unpredictable noises such as horizontal and vertical stripes, affecting the imaging quality; therefore, in the imaging display of the standard uncooled infrared detector, the instability of the working range will have a great negative impact on the scene judgment, and it may even be impossible to judge whether there is a target in the field of view. Therefore, solving the problem of "the instability of the working range of the standard uncooled infrared detector" is of extremely far-reaching significance.

[0004] In the prior art, the solution to the above two problems is to use integrated LC and RC modules combined with analog electronic technology to build a filter circuit, and use the characteristics of passive components such as resistors, capacitors, and inductors to achieve attenuation and suppression of high-frequency noise. However, the prior art cannot achieve absolute suppression of noise of a specific frequency, which in turn affects the imaging effect; in addition, the integrated LC and RC module design does not take into account the specific application environment and scenarios, so the imaging effect achieved may be slightly different for different application environments. Summary of the invention

[0005] The invention provides a power supply circuit based on power consumption monitoring and noise suppression to improve the imaging effect of a standard non-cooling infrared detector.

[0006] The technical solution of the present invention to solve the above technical problem is as follows: A power supply circuit based on power consumption monitoring and noise suppression, comprising:

[0007] A power input protection circuit, connected to a power supply, for performing over-current and over-voltage protection on the power supply, and obtaining an over-current and over-voltage protection signal;

[0008] An integrated noise suppression circuit, connected to the power input protection circuit, for performing noise suppression on the overcurrent and overvoltage protection signal to obtain a noise suppression signal;

[0009] A power consumption detection circuit based on an INA168 high-side measurement current shunt monitor is connected to the integrated noise suppression circuit and is used to perform power consumption detection on the noise suppression signal to obtain a power supply signal and a power consumption detection signal;

[0010] A DC-DC conversion circuit, connected to the power consumption detection circuit and the subsequent circuit, for performing DC-DC conversion on the power supply signal to obtain a power supply signal to supply power to the subsequent circuit;

[0011] The main controller is connected to the power consumption detection circuit and the subsequent circuit, and is used to obtain the power consumption detection signal in real time and protect the subsequent circuit according to the power consumption detection signal.

[0012] The beneficial effects of the present invention are as follows: the power supply circuit based on power consumption monitoring and noise suppression of the present invention can suppress voltage fluctuations and noise caused by the external environment or power supply voltage to the greatest extent by using an integrated noise suppression circuit, so that even under harsh environmental conditions, the power supply of the standard uncooled infrared detector can be guaranteed to work normally, thereby enabling the standard uncooled infrared detector to image normally and achieve a stable imaging effect; at the same time, the power consumption detection circuit based on the INA168 high-side measurement current shunt monitor is used to perfectly monitor the working state of the equipment, thereby realizing the protection of the standard uncooled infrared detector and improving the imaging quality and stability of the standard uncooled infrared detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural block diagram of a power supply circuit based on power consumption monitoring and noise suppression according to the present invention;

[0014] Figure 2 The schematic diagram of the power input protection circuit and the integrated noise suppression circuit;

[0015] Figure 3 This is the schematic diagram of the power consumption detection circuit;

[0016] Figure 4 It is the schematic diagram of the first-stage DC-DC conversion circuit;

[0017] Figure 5 It is the schematic diagram of the two-stage DC-DC conversion circuit;

[0018] Figure 6 This is the schematic diagram of the DDR power conversion circuit. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] like Figure 1 As shown, a power supply circuit based on power consumption monitoring and noise suppression includes:

[0021] The power input protection circuit 1 is connected to the power supply and is used to perform over-current and over-voltage protection on the power supply to obtain an over-current and over-voltage protection signal VCC_FC;

[0022] An integrated noise suppression circuit 2, connected to the power input protection circuit 1, for performing noise suppression on the overcurrent and overvoltage protection signal VCC_FC to obtain a noise suppression signal VI N;

[0023] A power consumption detection circuit 3, connected to the integrated noise suppression circuit 2, for performing power consumption detection on the noise suppression signal VI N to obtain a power supply signal VCC_I N and a power consumption detection signal CURRENT_DET;

[0024] A DC-DC conversion circuit 4 is connected to the power consumption detection circuit 3 and the subsequent circuit 5, and is used to perform DC-DC conversion on the power signal VCC_IN to obtain a power supply signal VCC_OUT to supply power to the subsequent circuit 5;

[0025] The main controller 6 is connected to the power consumption detection circuit 3 and the subsequent circuit 5, and is used to obtain the power consumption detection signal CURRENT_DET in real time, and protect the subsequent circuit 5 according to the power consumption detection signal.

[0026] In some embodiments, Figure 2 As shown, the power supply includes a first power supply VI N_24V and a second power supply VI N_12V; the power input protection circuit 1 includes:

[0027] A first fuse F1, one end of which is connected to the first power supply VI N_24V;

[0028] A second fuse F2, one end of which is connected to the second power supply VI N_12V;

[0029] The TVS tube D1 has one end connected to the first ground GND_PS, and the other end connected to the other end of the first fuse F1 and the other end of the second fuse F2, and outputs the over-current and over-voltage protection signal VCC_FC.

[0030] In the power input protection circuit 1, the input voltage range of the power supply is 8 to 36V. The input of the power supply first passes through the fuse and then passes through the TVS tube for current and voltage protection to prevent overcurrent and overvoltage. Among them, the first fuse F1 and the second fuse F2 are overcurrent protection components. By controlling the materials of the first fuse F1 and the second fuse F2, the power supply switching can be easily realized (that is, by selectively welding the first fuse F1 and the second fuse F2, the first power supply VI N_24V and the second power supply VI N_12V can be switched); and because of the characteristics of the first fuse F1 and the second fuse F2 themselves, the components can be protected when the current of the standard non-cooled infrared detector circuit is abnormal. The TVS tube D1 is an overvoltage protection component that can effectively protect against abnormal power supply voltage and static electricity.

[0031] When a power supply circuit based on power consumption monitoring and noise suppression of the present invention is applied to a standard non-cooled infrared detection movement, the power input protection circuit 1 performs circuit protection to prevent overcurrent and overvoltage, so that the standard non-cooled infrared detection movement has strong stability and can be applied to abnormal protection in various complex environments.

[0032] In some embodiments, Figure 2 As shown, the integrated noise suppression circuit 2 includes:

[0033] The suppression filter E1 of model BNX028-01 L has its B pin connected to the power input protection circuit to access the overcurrent and overvoltage protection signal VCC_FC, its PSG pin connected to the first ground GND_PS, its CB pin outputs the noise suppression signal VI N and is connected to the power consumption detection circuit, and its CG pin is connected to the second ground GND.

[0034] Specifically, the integrated noise suppression circuit 2 uses a suppression filter E1 with model number BNX028-01 L as a core component to suppress voltage fluctuations and noise caused by the external environment or power supply voltage to the greatest extent. Through the integrated design of the integrated noise suppression circuit 2 (the suppression filter E1 is an integrated circuit), the power supply of the standard uncooled infrared detector can be guaranteed to work normally even under harsh environmental conditions, thereby enabling the standard uncooled infrared detector to perform normal imaging and achieve a smooth imaging effect.

[0035] In some embodiments, Figure 3 As shown, the power consumption detection circuit 3 includes:

[0036] The package structure is a first resistor R1 for current sampling, and the first terminal I1, the second terminal I2, the third terminal E1 and the fourth terminal E2 are connected to the integrated noise suppression circuit 2 to access the noise suppression signal VI N, the second terminal I2 outputs the power supply signal VCC_I N and is connected to the DC-DC conversion circuit 4, the third terminal E1 outputs the first sampling signal VCC_I N_P, the fourth terminal E2 outputs the second sampling signal VCC_I N_N, and the first sampling signal VCC_I N_P and the second sampling signal VCC_I N_N are a pair of differential signals;

[0037] A current monitoring chip U1 of model I NA168NA / 250, whose VIN+ pin is connected to the third terminal E1, whose VIN- pin is connected to the fourth terminal E2, whose GND pin is connected to the second ground GND, whose V+ pin is connected to the second terminal I2, and whose OUT pin outputs the power consumption detection signal CURRENT_DET and is connected to the main controller 6;

[0038] A first capacitor C1, one end of which is connected to the V+ pin of the current monitoring chip U1, and the other end of which is connected to the second ground GND;

[0039] The second resistor R2 has one end connected to the OUT pin of the current monitoring chip U1 and the other end connected to the second ground GND.

[0040] In the power consumption detection circuit 3, the first resistor R1 is a current sampling resistor, which is a high-precision resistor. At the same time, due to its packaging characteristics, differential routing can be realized to achieve accurate detection of current. The current monitoring chip U1 of model INA168NA / 250 is connected to the differential signal generated by the first resistor R1, and the current sampling is converted into a voltage output through the internal analog circuit and the external load resistor (i.e., the second resistor R2). At the same time, because the input common mode and power supply voltage of the current monitoring chip U1 are independent of each other, the sampling signal will be very little affected by interference, and thus the error of the sampling output will be very small; the static current of the current monitoring chip U1 is only 25uA, which greatly reduces the power consumption of the movement component. The second resistor R2 is an external load resistor, which can set the gain range of the internal amplifier of the current monitoring chip U1 to 1 to 100. In the present invention, the high-precision sampling and differential pair of the first resistor R1 can make the monitoring of power consumption more accurate; the current monitoring chip U1 of model INA168NA / 250 has a response speed of microseconds, so the response is faster; the power consumption detection circuit 3 has a very small capacitive load, so the delay is small. In summary, the power consumption detection circuit 3 of the present invention can monitor the circuit state in real time, with more accurate monitoring, faster response, and less delay.

[0041] The main controller 6 can protect the subsequent circuit by obtaining the power consumption detection signal CURRENT_DET through the power consumption detection circuit 3; specifically, it can prevent damage to the standard non-refrigerated infrared detection movement under normal / abnormal power supply conditions and reduce the failure rate.

[0042] In some embodiments, the DC-DC conversion circuit includes:

[0043] A first-level DC-DC conversion circuit, connected to the power consumption detection circuit 3, for performing DC-DC conversion on the power supply signal VCC_IN to obtain the primary power supply signal VCC_5P0;

[0044] The secondary DC-DC conversion circuit is connected to the primary DC-DC conversion circuit and the subsequent circuit, and is used to perform DC-DC conversion on the primary power supply signal VCC_5P0 to obtain the power supply signal VCC_OUT to power the subsequent circuit.

[0045] Specifically, in the DC-DC conversion circuit, the discrete power supplies generated by the primary DC-DC conversion circuit and the secondary DC-DC conversion circuit provide power for the subsequent circuit.

[0046] In some embodiments, Figure 4 As shown, the first-level DC-DC conversion circuit includes:

[0047] A second capacitor C2, one end of which is connected to the power consumption detection circuit 3 to access the power signal VCC_I N, and the other end of which is connected to the second ground GND;

[0048] a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5, wherein the third capacitor C3, the fourth capacitor C4 and the fifth capacitor C5 are all connected in parallel with the second capacitor C2;

[0049] A first DC-DC chip U2 of model LMR33630BRNXR, whose VIN1 pin and VIN pin are connected to one end of the second capacitor C2, and whose PGND0 pin, AGND pin and PGND1 pin are all connected to the second ground GND;

[0050] A third resistor R3, two ends of which are respectively connected to the EN pin and the VI N1 pin of the first DC-DC chip U2;

[0051] A sixth capacitor C6, two ends of which are respectively connected to the BOOT pin and the SW pin of the first DC-DC chip U2;

[0052] A seventh capacitor C7, one end of which is connected to the VCC0 pin of the first DC-DC chip U2, and the other end of which is connected to the second ground GND;

[0053] A first inductor L1, one end of which is connected to the SW pin of the first DC-DC chip U2;

[0054] a fourth resistor R4, one end of which is connected to the other end of the first inductor L1, and the other end of which is connected to the FB pin of the first DC-DC chip U2;

[0055] a fifth resistor R5, one end of which is connected to the other end of the fourth resistor R4, and the other end of which is connected to the second ground GND;

[0056] an eighth capacitor C8, one end of which is connected to the other end of the first inductor L1, and the other end of which is connected to the second ground GND;

[0057] a ninth capacitor C9, a tenth capacitor C10 and an eleventh capacitor C11, wherein the ninth capacitor C9, the tenth capacitor C10 and the eleventh capacitor C11 are all connected in parallel with the eighth capacitor C8;

[0058] The power line of model YFF21 PC1 C474MT000N uses a through-type filter U3, whose IN / OUT pin is connected to the other end of the first inductor L1, whose GND1 pin and GND2 pin are connected to the second ground GND, and whose OUT / IN pin outputs the primary power supply signal VCC_5P0.

[0059] The primary DC-DC conversion circuit is used to convert a voltage of 8 to 36V into a DC voltage of about 5V to provide a primary power supply for the secondary DC-DC conversion circuit.

[0060] In some embodiments, Figure 5 As shown, the secondary DC-DC conversion circuit includes:

[0061] A twelfth capacitor C12, one end of which is connected to the first-level DC-DC conversion circuit to access the primary power supply signal VCC_5P0, and the other end of which is connected to the second ground GND;

[0062] A thirteenth capacitor C13 is connected in parallel with the twelfth capacitor C12;

[0063] A second DC-DC chip U4 of model TPS62827DMQ, whose VI N pin is connected to one end of the twelfth capacitor C12, and whose GND pin is connected to the second ground GND;

[0064] A sixth resistor R6, two ends of which are respectively connected to the EN pin and the VIN pin of the second DC-DC chip U4;

[0065] A fourteenth capacitor C14, one end of which is connected to the EN pin of the second DC-DC chip U4, and the other end of which is connected to the second ground GND;

[0066] a seventh resistor R7, one end of which is connected to the FB pin of the second DC-DC chip U4, and the other end of which is connected to the second ground GND;

[0067] A second inductor L2, one end of which is connected to the SW pin of the second DC-DC chip U4;

[0068] A fifteenth capacitor C15, one end of which is connected to the other end of the second inductor L2, and the other end of which is connected to the FB pin of the second DC-DC chip U4;

[0069] an eighth resistor R8 connected in parallel with the fifteenth capacitor C15;

[0070] A sixteenth capacitor C16, one end of which is connected to the other end of the second inductor L2, and the other end of which is connected to the second ground GND;

[0071] A seventeenth capacitor C17, connected in parallel with the sixteenth capacitor C16;

[0072] The magnetic bead FB has one end connected to the other end of the second inductor L2 and the other end outputting the power supply signal VCC_OUT.

[0073] The two-stage DC-DC conversion circuit can improve the utilization efficiency of the power supply by reducing the voltage drop from input to output, thereby minimizing the power consumption of the subsequent circuit 5.

[0074] In some embodiments, the post-stage circuit 5 is specifically a standard non-refrigerated infrared detection core circuit; the standard non-refrigerated infrared detection core circuit includes an FPGA and a DDR module connected to the FPGA;

[0075] The main controller 6 is connected to the FPGA and the DDR module; the main controller is specifically used to trigger the FPGA to perform emergency processing on the sampled data when the power consumption detection signal is abnormal, and to power off the DDR module to protect the sampled data.

[0076] The main controller 6 cooperates with the power consumption detection circuit 3 to enable the standard non-cooled infrared detection movement to perform emergency data processing in the event of abnormal power supply, so as to implement emergency protection measures such as abnormal data storage, thereby avoiding the introduction of various unpredictable noises such as horizontal and vertical lines, and improving imaging quality.

[0077] In some embodiments, a DDR power conversion circuit is provided in the VTT power supply of the DDR module; Figure 6 As shown, the DDR power conversion circuit includes:

[0078] An eighteenth capacitor C18, one end of which is connected to the reference power supply signal VCC1V5, and the other end of which is connected to the second ground GND;

[0079] a nineteenth capacitor C19 and a twentieth capacitor C20, wherein the nineteenth capacitor C19 and the twenty-third capacitor C20 are both connected in parallel with the eighteenth capacitor C18;

[0080] a ninth resistor R9, one end of which is connected to one end of the eighteenth capacitor C18;

[0081] A twenty-first capacitor C21, one end of which is connected to the other end of the ninth resistor R9, and the other end of which is connected to the second ground GND;

[0082] a tenth resistor R10 connected in parallel with the twenty-first capacitor C21;

[0083] The power chip U5 of model TPS51200DRCT has a REF IN pin connected to the other end of the ninth resistor R9, a VLDOI N pin connected to one end of the ninth resistor R9, a VO pin outputting a VTT signal VCC0V75_DDR3_VTT, a PGND pin and a GND pin connected to the second ground GND, a VI N pin connected to a DDR power supply signal VCC3V3, a PGOOD pin outputting a power good signal DDR_VTT_PG, an EN pin connected to an enable signal VCC1V5_PG, and a REFOUT pin outputting a DDR reference signal VCC0V75_DDR3_VREF;

[0084] an eleventh resistor R11, one end of which is connected to the VO pin of the power chip U5, and the other end of which is connected to the second ground GND;

[0085] A twenty-second capacitor C22, a twenty-third capacitor C23, a twenty-fourth capacitor C24 and a twenty-fifth capacitor C25, wherein the twenty-second capacitor C22, the twenty-third capacitor C23, the twenty-fourth capacitor C24 and the twenty-fifth capacitor C25 are all connected in parallel with the eleventh resistor R11;

[0086] A twelfth resistor R12, two ends of which are respectively connected to the VO pin and the VOSNS pin of the power chip U5;

[0087] A thirteenth resistor R13, one end of which is connected to the PGOOD pin of the power chip U5, and the other end of which outputs the MCU power signal VCC3V3_MCU;

[0088] A twenty-sixth capacitor C26, one end of which is connected to the REFOUT pin of the power chip U5, and the other end of which is connected to the second ground GND;

[0089] A twenty-seventh capacitor C27, one end of which is connected to the EN pin of the power chip U5, and the other end of which is connected to the second ground GND;

[0090] A twenty-eighth capacitor C28, one end of which is connected to the VIN pin of the power chip U5, and the other end of which is connected to the second ground GND;

[0091] A twenty-ninth capacitor C29 is connected in parallel with the twenty-eighth capacitor C28;

[0092] Among them, the reference power supply signal VCC1V5, the DDR power supply signal VCC3V3 and the enable signal VCC1V5_PG are all converted from the power supply signal VCC_OUT; the VTT signal VCC0V75_DDR3_VTT, the MCU power supply signal VCC3V3_MCU (the MCU power supply signal VCC3V3_MCU is obtained from the power good signal DDR_VTT_PG through the thirteenth resistor R13, and the thirteenth resistor R13 is used to improve the output capacity of the IO port of the power chip U5) and the DDR reference signal VCC0V75_DDR3_VREF are used as control signals of the VTT power supply.

[0093] Specifically, in a standard non-cooled infrared detector, the DDR module is directly connected to the FPGA to achieve data caching and processing. In the processing of the VTT power supply of the DDR module, the present invention adopts a design scheme that is completely different from the past (the existing scheme is to obtain the VTT power supply by resistor voltage division. The voltage obtained in this way is greatly affected by temperature and there will be useless power consumption on the resistor. The present invention adopts an integrated circuit solution to solve this problem). The following is designed in the VTT power supply: Figure 6 The DDR power conversion circuit shown adopts an integrated circuit chip design scheme, which improves the utilization efficiency and stability of the VTT power supply, thereby further improving the stability of data transmission, thereby ensuring improved imaging stability.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply circuit based on power consumption monitoring and noise suppression, characterized in that: include: A power input protection circuit, connected to a power supply, for performing over-current and over-voltage protection on the power supply, and obtaining an over-current and over-voltage protection signal; An integrated noise suppression circuit, connected to the power input protection circuit, for performing noise suppression on the overcurrent and overvoltage protection signal to obtain a noise suppression signal; A power consumption detection circuit based on an INA168 high-side measurement current shunt monitor is connected to the integrated noise suppression circuit and is used to perform power consumption detection on the noise suppression signal to obtain a power supply signal and a power consumption detection signal; A DC-DC conversion circuit, connected to the power consumption detection circuit and the subsequent circuit, for performing DC-DC conversion on the power supply signal to obtain a power supply signal to supply power to the subsequent circuit; The main controller is connected to the power consumption detection circuit and the subsequent circuit, and is used to obtain the power consumption detection signal in real time and protect the subsequent circuit according to the power consumption detection signal.

2. The power supply circuit based on power consumption monitoring and noise suppression according to claim 1, characterized in that: The power supply includes a first power supply and a second power supply; the power input protection circuit includes: A first fuse, one end of which is connected to the first power supply; a second fuse, one end of which is connected to the second power supply; The TVS tube has one end connected to the first ground, the other end connected to the other end of the first fuse and the other end of the second fuse, and outputs the overcurrent and overvoltage protection signal.

3. The power supply circuit based on power consumption monitoring and noise suppression according to claim 2, characterized in that: The first fuse and the second fuse are selectively welded to achieve switching between the first power supply and the second power supply.

4. The power supply circuit based on power consumption monitoring and noise suppression according to claim 1, characterized in that: The integrated noise suppression circuit comprises: The suppression filter model is BNX028-01 L, its B pin is connected to the power input protection circuit to access the overcurrent and overvoltage protection signal, its PSG pin is connected to the first ground, its CB pin outputs the noise suppression signal and is connected to the power consumption detection circuit, and its CG pin is connected to the second ground.

5. The power supply circuit based on power consumption monitoring and noise suppression according to claim 1, characterized in that: The power consumption detection circuit comprises: A first resistor with a differential routing package structure and used for current sampling, comprising a first end, a second end, a third end and a fourth end, wherein the first end is connected to the integrated noise suppression circuit to access the noise suppression signal, the second end outputs the power supply signal and is connected to the DC-DC conversion circuit, the third end outputs a first sampling signal, the fourth end outputs a second sampling signal, and the first sampling signal and the second sampling signal are a pair of differential signals; A current monitoring chip of model INA168NA / 250, whose VIN+ pin is connected to the third end, whose VIN- pin is connected to the fourth end, whose GND pin is connected to the second ground, whose V+ pin is connected to the second end, and whose OUT pin outputs the power consumption detection signal and is connected to the main controller; A first capacitor, one end of which is connected to the V+ pin of the current monitoring chip, and the other end of which is connected to the second ground; A second resistor has one end connected to the OUT pin of the current monitoring chip and the other end connected to the second ground.

6. The power supply circuit based on power consumption monitoring and noise suppression according to claim 1, characterized in that: The DC-DC conversion circuit comprises: a primary DC-DC conversion circuit, connected to the power consumption detection circuit, and configured to perform DC-DC conversion on the power supply signal to obtain a primary power supply signal; A secondary DC-DC conversion circuit is connected to the primary DC-DC conversion circuit and the subsequent circuit, and is used to perform DC-DC conversion on the primary power supply signal to obtain the power supply signal to power the subsequent circuit.

7. The power supply circuit based on power consumption monitoring and noise suppression according to claim 6, characterized in that: The first-level DC-DC conversion circuit comprises: A second capacitor, one end of which is connected to the power consumption detection circuit to access the power supply signal, and the other end of which is connected to a second ground; a third capacitor, a fourth capacitor and a fifth capacitor, wherein the third capacitor, the fourth capacitor and the fifth capacitor are all connected in parallel with the second capacitor; A first DC-DC chip of model LMR33630BRNXR, whose VIN1 pin and VIN pin are connected to one end of the second capacitor, and whose PGND0 pin, AGND pin and PGND1 pin are all connected to the second ground; A third resistor, two ends of which are respectively connected to the EN pin and the VIN1 pin of the first DC-DC chip; a sixth capacitor, two ends of which are respectively connected to the BOOT pin and the SW pin of the first DC-DC chip; a seventh capacitor, one end of which is connected to the VCC0 pin of the first DC-DC chip, and the other end of which is connected to the second ground; A first inductor, one end of which is connected to the SW pin of the first DC-DC chip; a fourth resistor, one end of which is connected to the other end of the first inductor, and the other end of which is connected to the FB pin of the first DC-DC chip; a fifth resistor, one end of which is connected to the other end of the fourth resistor, and the other end of which is connected to the second ground; an eighth capacitor, one end of which is connected to the other end of the first inductor, and the other end of which is connected to the second ground; a ninth capacitor, a tenth capacitor and an eleventh capacitor, wherein the ninth capacitor, the tenth capacitor and the eleventh capacitor are all connected in parallel with the eighth capacitor; The power line of model YFF21 PC1 C474MT000N uses a through-type filter, whose IN / OUT pin is connected to the other end of the first inductor, whose GND1 pin and GND2 pin are connected to the second ground, and whose OUT / IN pin outputs the primary power supply signal.

8. The power supply circuit based on power consumption monitoring and noise suppression according to claim 6, characterized in that: The secondary DC-DC conversion circuit comprises: a twelfth capacitor, one end of which is connected to the first-level DC-DC conversion circuit to access the primary power supply signal, and the other end of which is connected to the second ground; a thirteenth capacitor, connected in parallel with the twelfth capacitor; A second DC-DC chip of model TPS62827DMQ, whose VIN pin is connected to one end of the twelfth capacitor, and whose GND pin is connected to the second ground; a sixth resistor, two ends of which are respectively connected to the EN pin and the VIN pin of the second DC-DC chip; A fourteenth capacitor, one end of which is connected to the EN pin of the second DC-DC chip, and the other end of which is connected to the second ground; a seventh resistor, one end of which is connected to the FB pin of the second DC-DC chip, and the other end of which is connected to the second ground; a second inductor, one end of which is connected to the SW pin of the second DC-DC chip; A fifteenth capacitor, one end of which is connected to the other end of the second inductor, and the other end of which is connected to the FB pin of the second DC-DC chip; an eighth resistor connected in parallel with the fifteenth capacitor; a sixteenth capacitor, one end of which is connected to the other end of the second inductor, and the other end of which is connected to the second ground; a seventeenth capacitor, connected in parallel with the sixteenth capacitor; A magnetic bead, one end of which is connected to the other end of the second inductor, and the other end of which outputs the power supply signal.

9. The power supply circuit based on power consumption monitoring and noise suppression according to claim 1, characterized in that: The latter circuit is specifically a standard non-refrigerated infrared detection core circuit; the standard non-refrigerated infrared detection core circuit includes an FPGA and a DDR module connected to the FPGA; The main controller is connected to the FPGA and the DDR module; the main controller is specifically used to trigger the FPGA to perform emergency processing on the sampled data when the power consumption detection signal is abnormal, and to perform power-off processing on the DDR module to protect the sampled data.

10. The power supply circuit based on power consumption monitoring and noise suppression according to claim 9, characterized in that: The VTT power supply of the DDR module is provided with a DDR power supply conversion circuit; the DDR power supply conversion circuit comprises: An eighteenth capacitor, one end of which is connected to the reference power supply signal, and the other end of which is connected to the second ground; a nineteenth capacitor and a twentieth capacitor, wherein the nineteenth capacitor and the twenty-third capacitor are both connected in parallel with the eighteenth capacitor; a ninth resistor, one end of which is connected to one end of the eighteenth capacitor; A twenty-first capacitor, one end of which is connected to the other end of the ninth resistor, and the other end of which is connected to the second ground; a tenth resistor, connected in parallel with the twenty-first capacitor; A power chip of model TPS51200DRCT, wherein the REFIN pin thereof is connected to the other end of the ninth resistor, the VLDOIN pin thereof is connected to one end of the ninth resistor, the VO pin thereof outputs a VTT signal, the PGND pin thereof and the GND pin thereof are connected to the second ground, the VIN pin thereof is connected to a DDR power supply signal, the PGOOD pin thereof outputs a power good signal, the EN pin thereof is connected to an enable signal, and the REFOUT pin thereof outputs a DDR reference signal; an eleventh resistor, one end of which is connected to the VO pin of the power chip, and the other end of which is connected to the second ground; a twenty-second capacitor, a twenty-third capacitor, a twenty-fourth capacitor and a twenty-fifth capacitor, wherein the twenty-second capacitor, the twenty-third capacitor, the twenty-fourth capacitor and the twenty-fifth capacitor are all connected in parallel with the eleventh resistor; A twelfth resistor, two ends of which are respectively connected to the VO pin and the VOSNS pin of the power chip; A thirteenth resistor, one end of which is connected to the PGOOD pin of the power chip, and the other end of which outputs the MCU power signal; A twenty-sixth capacitor, one end of which is connected to the REFOUT pin of the power chip, and the other end of which is connected to the second ground; A twenty-seventh capacitor, one end of which is connected to the EN pin of the power chip, and the other end of which is connected to the second ground; A twenty-eighth capacitor, one end of which is connected to the VIN pin of the power chip, and the other end of which is connected to the second ground; A twenty-ninth capacitor is connected in parallel with the twenty-eighth capacitor; The reference power supply signal, the DDR power supply signal and the enable signal are all converted from the power supply signal; the VTT signal, the MCU power supply signal and the DDR reference signal serve as control signals of the VTT power supply.

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