Wireless Internet of Things gateway power supply circuit

Abstract

The utility model discloses a wireless Internet of Things gateway power supply circuit, which relates to the technical field of Internet of Things gateways and comprises a power supply module used for being connected with commercial power and processing electric energy; the power supply detection module is used for power-off detection; the photovoltaic energy storage module is used for photoelectric conversion, voltage stabilization adjustment, energy storage and discharging; the electric quantity detection module is used for detecting full electricity and detecting whether the electric quantity is lower than half of the full electricity state in cooperation with the threshold adjustment module when the full electricity is detected; the first power supply control module is used for controlling electric energy transmission of the power supply module; the second power supply control module is used for controlling electric energy transmission of the photovoltaic energy storage module; and the Internet of Things gateway module is used for voltage stabilization regulation and power supply for Internet of Things gateway equipment. According to the wireless Internet of Things gateway power supply circuit, the electric energy cost is reduced, the photovoltaic energy storage module is prevented from undervoltage, the service life of the photovoltaic energy storage module is prolonged, when the power supply module is powered off, the photovoltaic energy storage module supplies power, and the power supply efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of Internet of Things gateways, in particular to a power supply circuit for a wireless Internet of Things gateway. Background Technique

[0002] The Internet of Things gateway device, also known as the IOT gateway device, is a crucial network device that can achieve wireless interconnection within a wide area and also within a local area. And since the Internet of Things gateway device needs to keep working continuously, it requires uninterrupted supply of the required working electric energy. The existing Internet of Things gateway devices generally adopt a hybrid power supply method of a photovoltaic energy storage device and mains power to ensure the power supply and reduce the power supply cost. Among them, when the photovoltaic energy storage device is fully charged, it supplies power, and when the power is low, it resumes mains power supply and performs energy storage work. Long-term low power is likely to reduce the service life of the photovoltaic energy storage device. And when the power of the photovoltaic energy storage device is consumed and a power failure occurs in the mains power, it cannot maintain the power supply state, resulting in the Internet of Things gateway device stopping working, and the power supply efficiency is relatively low. Therefore, it needs to be improved. Content of the Utility Model

[0003] The embodiment of the utility model provides a power supply circuit for a wireless Internet of Things gateway to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] The power supply circuit for a wireless Internet of Things gateway includes: a power supply module, a power supply detection module, a photovoltaic energy storage module, a power detection module, a threshold adjustment module, a first power supply control module, a second power supply control module, and an Internet of Things gateway module;

[0006] The power supply module is used to access the mains power and perform step-down, rectification, and filtering processing on the mains power, and is used to output the first electric energy;

[0007] The power supply detection module is connected to the power supply module and is used to perform isolated power supply detection on the first electric energy, and output a first control signal when the first electric energy is not received;

[0008] The photovoltaic energy storage module is used for photoelectric conversion and voltage stabilization adjustment processing and stores the processed electric energy, and is used to provide the second electric energy;

[0009] The power detection module is connected to the photovoltaic energy storage module and is used to perform power detection on the electric energy stored in the photovoltaic energy storage module and output a first detection signal, set a full charge threshold and receive the voltage threshold provided by the threshold adjustment module, and output a second control signal when the first detection signal is greater than the full charge threshold, and output a third control signal when the first detection signal is greater than the voltage threshold;

[0010] A threshold adjustment module, connected to the power detection module, for receiving a second control signal and adjusting the voltage value of the full charge threshold, and for providing a voltage threshold for the power detection module;

[0011] A first power supply control module, connected to the power supply module, the power supply detection module, the Internet of Things gateway module, and the power detection module, for transmitting the first electric energy to the Internet of Things gateway module, and for receiving the first control signal, the second control signal, and the third control signal and stopping the power transmission work;

[0012] A second power supply control module, connected to the power supply detection module, the Internet of Things gateway module, the photovoltaic energy storage module, and the power detection module, for receiving the first control signal, the second control signal, and the third control signal and transmitting the second electric energy to the Internet of Things gateway module;

[0013] An Internet of Things gateway module, for receiving the electric energy transmitted by the first power supply control module and the second power supply control module and performing voltage stabilization adjustment, and for supplying power to the Internet of Things gateway device.

[0014] As a further solution of the present utility model: The power supply module includes a mains interface, a first transformer, a first rectifier, and a first capacitor; the first power supply control module includes a first resistor, a first power transistor, a first switching transistor, and a second resistor; the Internet of Things gateway module includes a first electric energy processing device and an Internet of Things gateway device;

[0015] Preferably, the first end and the second end of the mains interface are respectively connected to the first end and the second end of the primary side of the first transformer, the first end and the second end of the secondary side of the first transformer are respectively connected to the first input end and the second input end of the first rectifier, the first output end of the first rectifier is connected to the first end of the first capacitor and the drain of the first power transistor and is connected to the gate of the first power transistor and the collector of the first switching transistor through the first resistor, the source of the first power transistor is connected to the input end of the first electric energy processing device, the output end of the first electric energy processing device is connected to the first end of the Internet of Things gateway device, the second end of the Internet of Things gateway device, the grounding end of the first electric energy processing device, the emitter of the first switching transistor, the second end of the first capacitor, and the second output end of the first rectifier are all grounded, the base of the first switching transistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the power supply detection module and the power detection module.

[0016] As a further solution of the present utility model: The power supply detection module includes a ninth resistor, a first optocoupler, a first power supply, a tenth resistor, and a third diode;

[0017] Preferably, the first end of the first optocoupler is connected to the first output end of the first rectifier through the ninth resistor, the second end of the first optocoupler is connected to the second output end of the first rectifier, the third end of the first optocoupler is connected to the anode of the third diode and is connected to the first power supply through the tenth resistor, the fourth end of the first optocoupler is grounded, and the cathode of the third diode is connected to the second end of the second resistor.

[0018] As a further aspect of the present invention: the photovoltaic energy storage module includes a photovoltaic panel, a second power processing device, a second capacitor, a first diode, and an energy storage device;

[0019] Preferably, the first end of the photovoltaic panel is connected to the input end of the second power processing device, the output end of the second power processing device is connected to the anode of the first diode and one end of the second capacitor, the cathode of the first diode is connected to the first end of the energy storage device, and the second end of the energy storage device, the other end of the second capacitor, the grounding end of the second power processing device, and the second end of the photovoltaic panel are all grounded.

[0020] As a further aspect of the present invention: the second power supply control module includes a second power transistor;

[0021] Preferably, the base of the second power transistor is connected to the cathode of the first diode, the gate of the second power transistor is connected to the second end of the second resistor, the cathode of the third diode, and the power detection module, and the source of the second power transistor is connected to the input end of the first power processing device.

[0022] As a further aspect of the present invention: the power detection module includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first comparator, and a second diode;

[0023] Preferably, one end of the third resistor is connected to the first end of the fifth resistor and the ground end, the other end of the third resistor is connected to the non-inverting input end of the first comparator and is connected to the first end of the energy storage device and one end of the sixth resistor through the fourth resistor, the other end of the sixth resistor is connected to the inverting input end of the first comparator and the second end of the fifth resistor, the output end of the first comparator is connected to the anode of the second diode and the threshold adjustment module, and the cathode of the second diode is connected to the second end of the second resistor.

[0024] As a further aspect of the present invention: the threshold adjustment module includes a second switching transistor, a seventh resistor, and an eighth resistor;

[0025] Preferably, the base of the second switching transistor is connected to the output end of the first comparator through the seventh resistor, the collector of the second switching transistor is connected to the second end of the fifth resistor, and the emitter of the second switching transistor is grounded through the eighth resistor.

[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows: The power supply circuit of the wireless IoT gateway of the present utility model transmits the electric energy output by the first power supply control module from the power supply module to supply power to the IoT gateway module. The photovoltaic energy storage module performs photoelectric conversion and electric energy storage. The power quantity detection module conducts a full charge detection on the photovoltaic energy storage module. When it is fully charged, the second power supply control module transmits the electric energy released by the photovoltaic energy storage module to supply power to the IoT gateway module, and at the same time, the first power supply control module cuts off the power supply until the power quantity of the photovoltaic energy storage module reaches half of the full charge state, at which time the power supply will be restored by the first power supply control module, avoiding the situation of undervoltage of the photovoltaic energy storage module and improving the service life of the photovoltaic energy storage module. When the power supply detection module detects that the power supply module is powered off, it will directly be powered by the photovoltaic energy storage module, improving the power supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic block diagram of the principle of the power supply circuit of the wireless IoT gateway provided by the embodiment of the present utility model.

[0029] Figure 2 It is a circuit diagram of the power supply circuit of the wireless IoT gateway provided by the embodiment of the present utility model.

[0030] Figure 3 It is a connection circuit diagram of the power supply detection module provided by the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0032] In one embodiment, please refer to Figure 1 , the power supply circuit of the wireless IoT gateway includes: a power supply module 1, a power supply detection module 2, a photovoltaic energy storage module 3, a power quantity detection module 4, a threshold adjustment module 5, a first power supply control module 6, a second power supply control module 7, and an IoT gateway module 8;

[0033] Specifically, the power supply module 1 is used to connect to the mains power supply and perform step-down, rectification, and filtering processes on the mains power supply, and is used to output the first electric energy;

[0034] The power supply detection module 2 is connected to the power supply module 1 and is used to perform isolated power supply detection on the first electric energy, and output a first control signal when the first electric energy is not received;

[0035] The photovoltaic energy storage module 3 is used for photoelectric conversion, voltage stabilization regulation processing, and storing the processed electric energy, and is used to provide the second electric energy;

[0036] The power quantity detection module 4 is connected to the photovoltaic energy storage module 3 and is used to detect the power quantity of the electric energy stored in the photovoltaic energy storage module 3 and output a first detection signal, is used to set the full charge threshold and receive the voltage threshold provided by the threshold adjustment module 5, and output a second control signal when the first detection signal is greater than the full charge threshold, and output a third control signal when the first detection signal is greater than the voltage threshold;

[0037] The threshold adjustment module 5 is connected to the power quantity detection module 4 and is used to receive the second control signal and adjust the voltage value of the full charge threshold, and provide a voltage threshold for the power quantity detection module 4;

[0038] The first power supply control module 6 is connected to the power supply module 1, the power supply detection module 2, the Internet of Things gateway module 8, and the power quantity detection module 4, and is used to transmit the first electric energy to the Internet of Things gateway module 8, and is used to receive the first control signal, the second control signal, and the third control signal and stop the power transmission work;

[0039] The second power supply control module 7 is connected to the power supply detection module 2, the Internet of Things gateway module 8, the photovoltaic energy storage module 3, and the power quantity detection module 4, and is used to receive the first control signal, the second control signal, and the third control signal and transmit the second electric energy to the Internet of Things gateway module 8;

[0040] The Internet of Things gateway module 8 is used to receive the electric energy transmitted by the first power supply control module 6 and the second power supply control module 7 and supply power to the Internet of Things gateway device.

[0041] In a specific embodiment, the above-mentioned power supply module 1 may adopt a power supply circuit composed of a mains interface, a transformer, a rectifier, and a capacitor, which can access the mains power supply and perform step-down, rectification, and filtering on the mains power supply; the above-mentioned power supply detection module 2 may adopt a power supply detection circuit composed of an optocoupler, a diode, a resistor, etc., which can perform power-off detection on the power supply module 1 and output a first control signal in a high-level state when the power supply module 1 is powered off; the above-mentioned photovoltaic energy storage module 3 may adopt a photovoltaic energy storage circuit composed of a photovoltaic panel, a capacitor, an energy storage device, etc., to perform photoelectric conversion, voltage regulation, energy storage, and discharge; the above-mentioned power quantity detection module 4 may adopt a power quantity detection circuit composed of a resistor, a comparator, and a diode, which can detect the power quantity of the electric energy stored in the photovoltaic energy storage module 3, set a full charge threshold, compare the detected signal with the full charge threshold, and then perform full charge judgment; the above-mentioned threshold adjustment module 5 may adopt a threshold adjustment circuit composed of a triode and a resistor, which can reduce the voltage of the full charge threshold and provide a voltage threshold for the power quantity detection module 4, and the voltage value of this voltage threshold is half of the voltage value of the full charge threshold; the above-mentioned first power supply control module 6 may adopt a first power supply control circuit composed of a power tube, a triode, and a resistor, which can transmit the electric energy output by the power supply module 1; the above-mentioned second power supply control module 7 may adopt a second power supply control circuit composed of a power tube, which can transmit the electric energy output by the photovoltaic energy storage module 3; the above-mentioned Internet of Things gateway module 8 may adopt an Internet of Things gateway circuit composed of an electric energy processing device and an Internet of Things gateway device to perform voltage regulation and supply power to the Internet of Things gateway device.

[0042] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the power supply module 1 includes a mains interface, a first transformer B1, a first rectifier T1, and a first capacitor C1; the first power supply control module 6 includes a first resistor R1, a first power tube Q1, a first switch tube VT1, and a second resistor R2; the Internet of Things gateway module 8 includes a first electric energy processing device and an Internet of Things gateway device;

[0043] Specifically, the first end and the second end of the mains interface are respectively connected to the first end and the second end of the primary side of the first transformer B1. The first end and the second end of the secondary side of the first transformer B1 are respectively connected to the first input end and the second input end of the first rectifier T1. The first output end of the first rectifier T1 is connected to the first end of the first capacitor C1 and the drain of the first power transistor Q1, and is connected to the gate of the first power transistor Q1 and the collector of the first switching transistor VT1 through the first resistor R1. The source of the first power transistor Q1 is connected to the input end of the first power processing device. The output end of the first power processing device is connected to the first end of the IoT gateway device. The second end of the IoT gateway device, the grounding end of the first power processing device, the emitter of the first switching transistor VT1, the second end of the first capacitor C1, and the second output end of the first rectifier T1 are all grounded. The base of the first switching transistor VT1 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the power supply detection module 2 and the power quantity detection module 4.

[0044] In a specific embodiment, the above-mentioned first power transistor Q1 can be an N-channel field effect transistor; the above-mentioned first switching transistor VT1 can be an NPN type triode; the above-mentioned first power processing device can be composed of an LM317 three-terminal voltage regulator and resistors.

[0045] Further, the power supply detection module 2 includes a ninth resistor R9, a first optocoupler U1, a first power supply VCC1, a tenth resistor R10, and a third diode D3;

[0046] Specifically, the first end of the first optocoupler U1 is connected to the first output end of the first rectifier T1 through the ninth resistor R9. The second end of the first optocoupler U1 is connected to the second output end of the first rectifier T1. The third end of the first optocoupler U1 is connected to the anode of the third diode D3 and is connected to the first power supply VCC1 through the tenth resistor R10. The fourth end of the first optocoupler U1 is grounded. The cathode of the third diode D3 is connected to the second end of the second resistor R2.

[0047] In a specific embodiment, the above-mentioned first optocoupler U1 can be a PC817 optocoupler.

[0048] Further, the photovoltaic energy storage module 3 includes a photovoltaic panel, a second power processing device, a second capacitor C2, a first diode D1, and an energy storage device;

[0049] Specifically, the first end of the photovoltaic panel is connected to the input end of the second power processing device. The output end of the second power processing device is connected to the anode of the first diode D1 and one end of the second capacitor C2. The cathode of the first diode D1 is connected to the first end of the energy storage device. The second end of the energy storage device, the other end of the second capacitor C2, the grounding end of the second power processing device, and the second end of the photovoltaic panel are all grounded.

[0050] In a specific embodiment, the above-mentioned second power processing device may be composed of an LM317 voltage regulator and a resistor; the above-mentioned energy storage device may be a battery pack.

[0051] Further, the second power supply control module 7 includes a second power transistor Q2;

[0052] Specifically, the base of the second power transistor Q2 is connected to the cathode of the first diode D1, the gate of the second power transistor Q2 is connected to the second end of the second resistor R2, the cathode of the third diode D3, and the power detection module 4, and the source of the second power transistor Q2 is connected to the input end of the first power processing device.

[0053] In a specific embodiment, the above-mentioned second power transistor Q2 may be an N-channel field effect transistor.

[0054] Further, the power detection module 4 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first comparator A1, and a second diode D2;

[0055] Specifically, one end of the third resistor R3 is connected to the first end of the fifth resistor R5 and the ground terminal, the other end of the third resistor R3 is connected to the non-inverting input terminal of the first comparator A1 and is connected to the first end of the energy storage device and one end of the sixth resistor R6 through the fourth resistor R4, the other end of the sixth resistor R6 is connected to the inverting input terminal of the first comparator A1 and the second end of the fifth resistor R5, the output terminal of the first comparator A1 is connected to the anode of the second diode D2 and the threshold adjustment module 5, and the cathode of the second diode D2 is connected to the second end of the second resistor R2.

[0056] In a specific embodiment, the above-mentioned third resistor R3 and fourth resistor R4 perform power detection; the above-mentioned fifth resistor R5 and sixth resistor R6 provide a full charge threshold; the above-mentioned first comparator A1 may be an LM358 comparator.

[0057] Further, the threshold adjustment module 5 includes a second switching transistor VT2, a seventh resistor R7, and an eighth resistor R8;

[0058] Specifically, the base of the second switching transistor VT2 is connected to the output terminal of the first comparator A1 through the seventh resistor R7, the collector of the second switching transistor VT2 is connected to the second end of the fifth resistor R5, and the emitter of the second switching transistor VT2 is grounded through the eighth resistor R8.

[0059] In a specific embodiment, the above-mentioned second switching transistor VT2 may be an NPN-type triode, which cooperates with the eighth resistor R8 to reduce the voltage of the full charge threshold provided by the fifth resistor R5 and the sixth resistor R6.

[0060] In the power supply circuit of the wireless Internet of Things gateway of this embodiment, the mains power is connected to the mains power through the mains power interface, and the first transformer B1, the first rectifier T1 and the first capacitor C1 perform step-down, rectification and filtering processing in sequence. The first resistor R1 triggers the first power tube Q1 to turn on, so that the processed electric energy is transmitted to the first power processing device through the first power tube Q1, and the first power processing device is used to stabilize and regulate the electric energy to power the Internet of Things gateway device. At the same time, the photovoltaic panel performs photoelectric conversion, and the converted electric energy is stabilized and regulated by the second power processing device so as to be stored by the energy storage device. The third resistor R3 and the fourth resistor R4 detect the amount of electricity stored in the energy storage device. When the detected signal is greater than the full power threshold provided by the fifth resistor R5 and the sixth resistor R6, the first comparator A1 outputs a high level and triggers the conduction of the second switch tube VT2, the first switch tube VT1 and the second power tube Q2, and the second switch tube VT2 is turned on. The switch VT2 controls the eighth resistor R8 to be connected in parallel with the fifth resistor R5, thereby reducing the voltage of the full-power threshold provided by the fifth resistor R5 and the sixth resistor R6, and then providing a voltage threshold for the inverting end of the first comparator A1, the voltage of the voltage threshold is half of the voltage of the full-power threshold, the second power tube Q2 transmits the electric energy released by the energy storage device to the first electric energy processing device, the first power tube Q1 is turned off, when the signal detected by the third resistor R3 and the fourth resistor R4 is lower than the signal provided by the fifth resistor R5, the sixth resistor R6, the second switch tube VT2 and the eighth resistor R8, the first comparator A1 outputs a low level, the first power tube Q1 is restarted, if the power module 1 is powered off, the first optical coupler U1 is turned off, at this time, the first power supply VCC1 controls the first switch tube VT1 and the second power tube Q2 to be turned on through the tenth resistor R10 and the third diode D3, and the energy storage device is used for power supply.

[0061] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0062] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Wireless Internet of Things gateway power supply circuit, characterized in that the wireless Internet of Things gateway power supply circuit includes: a power supply module, a power supply detection module, a photovoltaic energy storage module, a power detection module, a threshold adjustment module, a first power supply control module, a second power supply control module and an Internet of Things gateway module; the power supply module is used to access the commercial power and perform step-down, rectification and filtering processing on the commercial power, and is used to output the first electric energy; the power supply detection module is connected to the power supply module, and is used to perform isolated power supply detection on the first electric energy, and output a first control signal when the first electric energy is not received; the photovoltaic energy storage module is used for photoelectric conversion and voltage stabilization adjustment processing and stores the processed electric energy, and is used to provide the second electric energy; the power detection module is connected to the photovoltaic energy storage module, and is used to perform power detection on the electric energy stored in the photovoltaic energy storage module and output a first detection signal, and is used to set the full charge threshold and receive the voltage threshold provided by the threshold adjustment module, and output a second control signal when the first detection signal is greater than the full charge threshold, and output a third control signal when the first detection signal is greater than the voltage threshold; the threshold adjustment module is connected to the power detection module, and is used to receive the second control signal and adjust the voltage value of the full charge threshold, and is used to provide the voltage threshold for the power detection module; the first power supply control module is connected to the power supply module, the power supply detection module, the Internet of Things gateway module and the power detection module, and is used to transmit the first electric energy to the Internet of Things gateway module, and is used to receive the first control signal, the second control signal and the third control signal and stop the power transmission work; the second power supply control module is connected to the power supply detection module, the Internet of Things gateway module, the photovoltaic energy storage module and the power detection module, and is used to receive the first control signal, the second control signal and the third control signal and transmit the second electric energy to the Internet of Things gateway module; the Internet of Things gateway module is used to receive the electric energy transmitted by the first power supply control module and the second power supply control module and perform voltage stabilization adjustment, and is used to supply power to the Internet of Things gateway device.

2. The power supply circuit of the wireless Internet of Things gateway according to claim 1, characterized in that The power supply module includes a commercial power interface, a first transformer, a first rectifier and a first capacitor; the first power supply control module includes a first resistor, a first power transistor, a first switch transistor and a second resistor; the Internet of Things gateway module includes a first electric energy processing device and an Internet of Things gateway device; The first end and the second end of the mains interface are respectively connected to the first end and the second end of the primary side of the first transformer. The first end and the second end of the secondary side of the first transformer are respectively connected to the first input end and the second input end of the first rectifier. The first output end of the first rectifier is connected to the first end of the first capacitor and the drain of the first power transistor, and is connected to the gate of the first power transistor and the collector of the first switching transistor through the first resistor. The source of the first power transistor is connected to the input end of the first power processing device. The output end of the first power processing device is connected to the first end of the IoT gateway device. The second end of the IoT gateway device, the grounding end of the first power processing device, the emitter of the first switching transistor, the second end of the first capacitor, and the second output end of the first rectifier are all grounded. The base of the first switching transistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the power supply detection module and the power quantity detection module.

3. The wireless IoT gateway power supply circuit according to claim 2, wherein The power supply detection module includes a ninth resistor, a first optocoupler, a first power supply, a tenth resistor, and a third diode; The first end of the first optocoupler is connected to the first output end of the first rectifier through the ninth resistor. The second end of the first optocoupler is connected to the second output end of the first rectifier. The third end of the first optocoupler is connected to the anode of the third diode and is connected to the first power supply through the tenth resistor. The fourth end of the first optocoupler is grounded. The cathode of the third diode is connected to the second end of the second resistor.

4. The wireless IoT gateway power supply circuit according to claim 3, wherein The photovoltaic energy storage module includes a photovoltaic panel, a second power processing device, a second capacitor, a first diode, and an energy storage device; The first end of the photovoltaic panel is connected to the input end of the second power processing device. The output end of the second power processing device is connected to the anode of the first diode and one end of the second capacitor. The cathode of the first diode is connected to the first end of the energy storage device. The second end of the energy storage device, the other end of the second capacitor, the grounding end of the second power processing device, and the second end of the photovoltaic panel are all grounded.

5. The power supply circuit of the wireless Internet of Things gateway according to claim 4, characterized in that, The second power supply control module includes a second power transistor; The base of the second power transistor is connected to the cathode of the first diode. The gate of the second power transistor is connected to the second end of the second resistor, the cathode of the third diode, and the power quantity detection module. The source of the second power transistor is connected to the input end of the first power processing device.

6. The wireless IoT gateway power supply circuit according to claim 5, characterized in that, The power quantity detection module includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first comparator, and a second diode; One end of the third resistor is connected to the first end of the fifth resistor and the ground end. The other end of the third resistor is connected to the non-inverting input end of the first comparator and is connected to the first end of the energy storage device and one end of the sixth resistor through the fourth resistor. The other end of the sixth resistor is connected to the inverting input end of the first comparator and the second end of the fifth resistor. The output end of the first comparator is connected to the anode of the second diode and the threshold adjustment module. The cathode of the second diode is connected to the second end of the second resistor.

7. The power supply circuit for the wireless Internet of Things gateway according to claim 6, wherein The threshold adjustment module includes a second switching transistor, a seventh resistor, and an eighth resistor; The base of the second switching transistor is connected to the output end of the first comparator through the seventh resistor. The collector of the second switching transistor is connected to the second end of the fifth resistor. The emitter of the second switching transistor is grounded through the eighth resistor.

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