Power supply safety monitoring circuit

Abstract

The invention discloses a power supply safety monitoring circuit, and relates to the technical field of power supply, and the circuit comprises a power module which is used for electric energy transmission control and multi-path voltage regulation; the first power supply sampling module, the second power supply sampling module and the third power supply sampling module are used for voltage division sampling, electric energy receiving control and signal conditioning; the central control module is used for signal receiving and module control; the sampling superposition module is used for isolation voltage regulation, electric energy superposition, filtering and rectification processing; the energy storage control module is used for storing the superposed electric energy and providing standby electric energy; and the discharge control module is used for transmitting standby electric energy to the power supply module when the energy storage control module is fully charged and the power supply module supplies power abnormally. According to the power supply safety monitoring circuit, voltage division sampling can be carried out on different power supply ends, electric energy superposition processing is carried out according to the sampling state, the cruising ability of the energy storage control module is improved, electric energy switching is carried out when the power supply module is abnormal, and a safe and reliable power supply monitoring environment is provided.

Description

Technical Field

[0001] The invention relates to the technical field of power supply, in particular to a power supply safety monitoring circuit. Background Art

[0002] The power supply can provide energy for the entire electrical equipment, so the power supply status of the power supply end is related to the operating status of the entire electrical equipment, so it is very important to accurately obtain the power supply status of the power supply. In order to ensure the safe power supply to the electrical equipment, the power supply of the electrical equipment is generally subjected to power supply safety monitoring. The power supply safety monitoring circuit in the prior art generally has an independent power supply, and in order to ensure the safety of power supply monitoring, a backup battery is used. When the main power supply is abnormal, the power supply demand is maintained by power switching. However, due to the limited battery life of the backup battery and the inability of the backup battery to interact with the monitoring end of the power supply monitoring circuit, when the backup battery is out of power, the power supply monitoring cannot be maintained. Therefore, there is room for improvement. Summary of the invention

[0003] The embodiment of the present invention provides a power supply safety monitoring circuit to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a power supply safety monitoring circuit is provided, including: a power supply module, a first power supply sampling module, a second power supply sampling module, a third power supply sampling module, a central control module, a sampling superposition module, an energy storage control module and a discharge control module; A power supply module, connected to the central control module and the discharge control module, for receiving direct current power and performing power transmission and multi-channel voltage regulation processing, stopping power transmission when receiving a switching signal output by the central control module, and performing multi-channel voltage regulation processing when receiving standby power output by the discharge control module; A first power supply sampling module, connected to the power supply module and the central control module, for performing voltage division sampling processing on the connected first power supply end and outputting a first sampling signal, receiving the electric energy output by the power supply module, performing signal conditioning on the first sampling signal and outputting a first data signal, and stopping the electric energy reception and signal conditioning work when receiving the first control signal output by the central control module; A second power supply sampling module is connected to the power supply module and the central control module, and is used to perform voltage division sampling processing on the connected second power supply end and output a second sampling signal, receive the electric energy output by the power supply module, perform signal conditioning on the second sampling signal and output a second data signal, and stop the electric energy reception and signal conditioning work when receiving the second control signal output by the central control module; A third power supply sampling module, connected to the power supply module and the central control module, for performing voltage division sampling processing on the connected third power supply end and outputting a third sampling signal, receiving the electric energy output by the power supply module, performing signal conditioning on the third sampling signal and outputting a third data signal, and stopping the electric energy reception and signal conditioning work when receiving the third control signal output by the central control module; A central control module, configured to receive a first data signal, a second data signal, and a third data signal, output a first control signal when the first power supply sampling module is not required for sampling, output a second control signal when the second power supply sampling module is not required for sampling, output a third control signal when the third power supply sampling module is not required for sampling, and output a switching signal when the power supply module is abnormal; A sampling and superposition module is connected to the first power supply sampling module, the second power supply sampling module, the third power supply sampling module and the central control module, and is used to adjust the voltage of the first sampling signal and output the first electric energy when receiving the first control signal, adjust the voltage of the second sampling signal and output the second electric energy when receiving the second control signal, and adjust the voltage of the third sampling signal and output the third electric energy when receiving the third control signal, and superimpose, filter and rectify the first electric energy, the second electric energy and the third electric energy and output the fourth electric energy; an energy storage control module, connected to the sampling and superposition module and the central control module, for storing fourth electric energy, releasing the stored electric energy and outputting standby electric energy when receiving the first control signal, the second control signal or the third control signal; The discharge control module is connected to the central control module and the energy storage control module, and is used to detect whether the energy storage control module is fully charged, and when the energy storage control module is fully charged and receives a switching signal, transmits the received standby power to the power supply module.

[0005] As a further solution of the present invention: the power module includes a power interface, a seventh resistor, a fourth power tube, a first switch tube and a multi-channel regulator; the central control module includes a first controller; Preferably, the first end of the power interface is connected to the drain of the fourth power tube and is connected to the gate of the fourth power tube and the collector of the first switching tube through the seventh resistor, the emitter of the first switching tube and the second end of the power interface are both grounded, the source of the fourth power tube is connected to the input end of the multi-channel regulator, the base of the first switching tube is connected to the IO7 end of the first controller, and the first output end, the second output end, the third output end and the fourth output end of the multi-channel regulator are respectively connected to the first power supply sampling module, the second power supply sampling module, the third power supply sampling module and the VCC end of the first controller.

[0006] As a further solution of the present invention: the first power supply sampling module includes a first detection interface, a first resistor, a second resistor, a first conditioning device, a fifth power tube, an eighth resistor, a fourth diode and a second switch tube; Preferably, the first end of the first detection interface is connected to the first end of the second resistor and the input end of the first conditioning device through the first resistor, the second end of the second resistor is connected to the second end of the first detection interface, the output end of the first conditioning device is connected to the IO1 end of the first controller, the power supply end of the first conditioning device is connected to the source of the fifth power tube, the drain of the fifth power tube is connected to the first output end of the multi-channel regulator and connected to the collector of the second switch tube and the gate of the fifth power tube through the eighth resistor, the emitter of the second switch tube is grounded, the base of the second switch tube is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the IO4 end of the first controller.

[0007] As a further solution of the present invention: the second power supply sampling module includes a second detection interface, a third resistor, a fourth resistor, a second conditioning device, a second power supply device and a fifth diode; Preferably, the first end of the second detection interface is connected to the first end of the fourth resistor and the input end of the second conditioning device through the third resistor, the second end of the fourth resistor is connected to the second end of the second detection interface, the output end of the second conditioning device is connected to the IO2 end of the first controller, the power supply end of the second conditioning device is connected to the output end of the second power supply device, the input end of the second power supply device is connected to the second output end of the multi-channel regulator, the control end of the second power supply device is connected to the cathode of the fifth diode, and the anode of the fifth diode is connected to the IO5 end of the first controller.

[0008] As a further solution of the present invention: the third power supply sampling module includes a third detection interface, a fifth resistor, a sixth resistor, a third power supply device, a third conditioning device and a sixth diode; Preferably, the first end of the third detection interface is connected to the first end of the sixth resistor and the input end of the third conditioning device through the fifth resistor, the second end of the sixth resistor is connected to the second end of the third detection interface, the control end of the third conditioning device is connected to the IO3 end of the first controller, the power supply end of the third conditioning device is connected to the output end of the third power supply device, the control end of the third power supply device is connected to the cathode of the sixth diode, the anode of the sixth diode is connected to the IO6 end of the first controller, and the input end of the third power supply device is connected to the second output end of the multi-channel regulator.

[0009] As a further solution of the present invention: the sampling and superposition module includes a first diode, a second diode, a third diode, a first transformer, a second transformer, a third transformer, a first power tube, a second power tube, a third power tube, a first capacitor and a first rectifier; Preferably, the anode of the first diode is connected to the first end of the second resistor, the anode of the second diode and the anode of the third diode are connected to the first end of the fourth resistor and the first end of the sixth resistor respectively, the cathode of the first diode is connected to the first end of the primary side of the first transformer, the second end of the primary side of the first transformer is connected to the drain of the first power tube, the gate of the first power tube is connected to the IO4 terminal of the first controller, the cathode of the third diode is connected to the first end of the primary side of the third transformer, the second end of the primary side of the third transformer is connected to the drain of the third power tube, the gate of the third power tube is connected to the IO6 terminal of the first controller, and the cathode of the second diode is connected The first end of the primary side of the second transformer and the second end of the primary side of the second transformer are connected to the drain of the second power tube, the gate of the second power tube is connected to the IO5 terminal of the first controller, the source of the first power tube, the source of the second power tube and the source of the third power tube are all grounded, the first end of the secondary side of the first transformer is connected to the second end of the secondary side of the third transformer, the first end of the secondary side of the third transformer is connected to the second end of the secondary side of the second transformer, the first end of the secondary side of the second transformer is connected to one end of the first capacitor and the first end of the first rectifier, and the other end of the first capacitor is connected to the second end of the first rectifier and the second end of the secondary side of the first transformer.

[0010] As a further solution of the present invention: the energy storage control module includes a sixth power tube, a seventh diode, an eighth diode, a ninth diode and an energy storage device; Preferably, the drain of the sixth power tube is connected to the third end of the first rectifier, the source of the sixth power tube is connected to the first end of the energy storage device and the discharge control module, the gate of the sixth power tube is connected to the cathode of the seventh diode, the cathode of the eighth diode and the cathode of the ninth diode, the second end of the energy storage device is connected to the fourth end of the first rectifier and the ground terminal, and the anode of the seventh diode, the anode of the eighth diode and the anode of the ninth diode are respectively connected to the IO4 terminal, the IO5 terminal and the IO6 terminal of the first controller.

[0011] As a further solution of the present invention: the discharge control module includes a ninth resistor, a tenth resistor, an eleventh resistor, a tenth diode, a first logic chip and a seventh power tube; Preferably, the drain of the seventh power tube is connected to the first end of the energy storage device and is connected to one end of the eleventh resistor and one end of the tenth resistor through the ninth resistor, the other end of the eleventh resistor is connected to the cathode of the tenth diode, the anode of the tenth diode is connected to the B end of the first logic chip, the Y end of the first logic chip is connected to the gate of the seventh power tube, the A end of the first logic chip is connected to the IO7 end of the first controller, and the source of the seventh power tube is connected to the input end of the multi-channel regulator.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the power supply safety monitoring circuit of the present invention can be powered by a power supply module, and the first power supply sampling module, the second power supply sampling module and the third power supply sampling respectively perform voltage division sampling on different power supply ends, which are then received by the central control module, and according to the working status of the first power supply sampling module, the second power supply sampling module and the third power supply sampling, the signal sampled by the power supply sampling module without signal conditioning is processed by the sampling superposition module for electric energy superposition. When the energy storage control module is insufficient in power, electric energy is provided to the energy storage control module to improve the endurance of the energy storage control module. When an abnormality occurs in the power supply module and the energy storage control module is fully charged, the energy storage control module can provide backup power supply to maintain the sampling work of the first power supply sampling module, the second power supply sampling module or the third power supply sampling module, and provide a safe and reliable power supply monitoring environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0014] Figure 1 A schematic block diagram of a power supply safety monitoring circuit provided in an embodiment of the present invention.

[0015] Figure 2 A circuit diagram of a power supply safety monitoring circuit provided in an embodiment of the present invention.

[0016] Figure 3 A circuit diagram of an energy storage control module provided in an embodiment of the present invention.

[0017] Figure 4 A circuit diagram of a discharge control module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In one embodiment, see Figure 1, a power supply safety monitoring circuit, comprising: a power supply module 1, a first power supply sampling module 2, a second power supply sampling module 3, a third power supply sampling module 4, a central control module 5, a sampling superposition module 6, an energy storage control module 7 and a discharge control module 8; Specifically, the power supply module 1 is connected to the central control module 5 and the discharge control module 8, and is used to access direct current power and perform power transmission and multi-channel voltage regulation processing. When receiving the switching signal output by the central control module 5, the power transmission work is stopped, and when receiving the standby power output by the discharge control module 8, the multi-channel voltage regulation processing is performed; The first power supply sampling module 2 is connected to the power supply module 1 and the central control module 5, and is used to perform voltage division sampling processing on the connected first power supply end and output a first sampling signal, receive the electric energy output by the power supply module 1, perform signal conditioning on the first sampling signal and output a first data signal, and stop the electric energy reception and signal conditioning work when receiving the first control signal output by the central control module 5; The second power supply sampling module 3 is connected to the power supply module 1 and the discharge control module 8, and is used to perform voltage division sampling processing on the connected second power supply end and output a second sampling signal, receive the electric energy output by the power supply module 1, perform signal conditioning on the second sampling signal and output a second data signal, and stop the electric energy reception and signal conditioning work when receiving the second control signal output by the central control module 5; The third power supply sampling module 4 is connected to the power supply module 1 and the central control module 5, and is used to perform voltage division sampling processing on the connected third power supply end and output a third sampling signal, receive the electric energy output by the power supply module 1, perform signal conditioning on the third sampling signal and output a third data signal, and stop the electric energy reception and signal conditioning work when receiving the third control signal output by the central control module 5; The central control module 5 is used to receive the first data signal, the second data signal and the third data signal, output the first control signal when the first power supply sampling module 2 is not needed for sampling, output the second control signal when the second power supply sampling module 3 is not needed for sampling, output the third control signal when the third power supply sampling module 4 is not needed for sampling, and output the switching signal when the power supply module 1 is abnormal; The sampling and superposition module 6 is connected to the first power supply sampling module 2, the second power supply sampling module 3, the third power supply sampling module 4 and the central control module 5, and is used to adjust the voltage of the first sampling signal and output the first electric energy when receiving the first control signal, adjust the voltage of the second sampling signal and output the second electric energy when receiving the second control signal, and adjust the voltage of the third sampling signal and output the third electric energy when receiving the third control signal, and superimpose, filter and rectify the first electric energy, the second electric energy and the third electric energy and output the fourth electric energy; an energy storage control module 7, connected to the sampling and superposition module 6 and the central control module 5, for storing fourth electric energy, releasing the stored electric energy and outputting standby electric energy when receiving the first control signal, the second control signal or the third control signal; The discharge control module 8 is connected to the central control module 5 and the energy storage control module 7, and is used to detect whether the energy storage control module 7 is fully charged, and when the energy storage control module 7 is fully charged and receives a switching signal, transmits the received standby power to the power module 1.

[0020] In a specific embodiment, the power supply module 1 may adopt a power supply circuit composed of a power supply interface, a field effect transistor, a multi-channel voltage regulator T2, etc., which can be connected to DC power, control the transmission of DC power and perform multi-channel voltage regulation and output processing on the transmitted DC power; the first power supply sampling module 2 may adopt a first power supply sampling circuit composed of a first detection interface, a resistor, a conditioning device, a field effect transistor, etc., which can be connected to the power supply end to be detected and perform voltage division processing on the voltage output by the power supply end, control the state of the power output by the receiving power supply module 1 and perform signal conditioning processing; the second power supply sampling module 3 may adopt a second power supply sampling circuit composed of a second detection interface, a resistor, a conditioning device, a field effect transistor, etc., which can be connected to the power supply end to be detected and perform voltage division processing on the voltage output by the power supply end, control the state of the power output by the receiving power supply module 1 and perform signal conditioning processing; the third power supply sampling may adopt a third power supply sampling circuit composed of a third detection interface, a resistor, a conditioning device, a field effect transistor, etc., which can be connected to the power supply end to be detected and perform voltage division processing on the power supply end The voltage output by the end is divided to control the state of the electric energy output by the receiving power supply module 1 and perform signal conditioning processing; the above-mentioned central control module 5 can adopt a central control circuit composed of a single-chip microcomputer, integrating many components such as an arithmetic unit, a controller, a memory, and an input and output device to realize functions such as signal processing, data storage, module control, and timing control; the above-mentioned sampling superposition module 6 can adopt a sampling superposition circuit composed of a transformer, a field effect transistor, a rectifier, etc., which can perform isolation transformation, electric energy superposition, electric energy filtering and electric energy rectification processing on the signals output by the first power supply sampling module 2, the second power supply sampling module 3 and the third power supply sampling module 4; the above-mentioned energy storage control module 7 can adopt an energy storage control circuit composed of an energy storage device, a diode and a field effect transistor to perform energy storage work; the above-mentioned discharge control module 8 can adopt a discharge control circuit composed of a resistor, a diode, a logic chip and a field effect transistor, which can detect the full power of the energy storage control module 7 and transmit the electric energy output by the energy storage control module 7 to the power supply module 1 when it is fully charged and power switching is required.

[0021] In another embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4The power module 1 includes a power interface, a seventh resistor R7, a fourth power tube Q4, a first switch tube V1 and a multi-channel regulator T2; the central control module 5 includes a first controller U1; Specifically, the first end of the power interface is connected to the drain of the fourth power tube Q4 and is connected to the gate of the fourth power tube Q4 and the collector of the first switch tube V1 through the seventh resistor R7. The emitter of the first switch tube V1 and the second end of the power interface are both grounded. The source of the fourth power tube Q4 is connected to the input end of the multi-channel regulator T2, and the base of the first switch tube V1 is connected to the IO7 end of the first controller U1. The first output end, the second output end, the third output end and the fourth output end of the multi-channel regulator T2 are respectively connected to the first power supply sampling module 2, the second power supply sampling module 3, the third power supply sampling module 4 and the VCC end of the first controller U1.

[0022] In a specific embodiment, the fourth power tube Q4 may be an N-channel field effect tube; the first switch tube V1 may be an NPN transistor; the multi-channel regulator T2 may be composed of four groups of 78 series regulators, which are respectively powered by the central control module 5, the first power supply sampling module 2, the second power supply sampling module 3 and the third power supply sampling module 4; the first controller U1 may be an STM32 microcontroller.

[0023] Further, the first power supply sampling module 2 includes a first detection interface, a first resistor R1, a second resistor R2, a first conditioning device, a fifth power tube Q5, an eighth resistor R8, a fourth diode D4 and a second switch tube V2; Specifically, the first end of the first detection interface is connected to the first end of the second resistor R2 and the input end of the first conditioning device through the first resistor R1, the second end of the second resistor R2 is connected to the second end of the first detection interface, the output end of the first conditioning device is connected to the IO1 end of the first controller U1, the power supply end of the first conditioning device is connected to the source of the fifth power tube Q5, the drain of the fifth power tube Q5 is connected to the first output end of the multi-channel regulator T2 and is connected to the collector of the second switch tube V2 and the gate of the fifth power tube Q5 through the eighth resistor R8, the emitter of the second switch tube V2 is grounded, the base of the second switch tube V2 is connected to the cathode of the fourth diode D4, and the anode of the fourth diode D4 is connected to the IO4 end of the first controller U1.

[0024] In a specific embodiment, the first resistor R1 and the second resistor R2 perform voltage division processing; the first conditioning device can be composed of an operational amplifier, a capacitor and a resistor to perform signal amplification and filtering processing; the fifth power tube Q5 can be an N-channel field effect tube; the second switch tube V2 can be an NPN transistor.

[0025] Further, the second power supply sampling module 3 includes a second detection interface, a third resistor R3, a fourth resistor R4, a second conditioning device, a second power supply device and a fifth diode D5; Specifically, the first end of the second detection interface is connected to the first end of the fourth resistor R4 and the input end of the second conditioning device through the third resistor R3, the second end of the fourth resistor R4 is connected to the second end of the second detection interface, the output end of the second conditioning device is connected to the IO2 end of the first controller U1, the power supply end of the second conditioning device is connected to the output end of the second power supply device, the input end of the second power supply device is connected to the second output end of the multi-channel regulator T2, the control end of the second power supply device is connected to the cathode of the fifth diode D5, and the anode of the fifth diode D5 is connected to the IO5 end of the first controller U1.

[0026] In a specific embodiment, the selection of the above-mentioned second conditioning device is the same as that of the first conditioning device; the circuit composition structure of the above-mentioned second power supply device is the same as the circuit composition structure of the fifth power tube Q5, the eighth resistor R8 and the second switch tube V2.

[0027] Further, the third power supply sampling module 4 includes a third detection interface, a fifth resistor R5, a sixth resistor R6, a third power supply device, a third conditioning device and a sixth diode D6; Specifically, the first end of the third detection interface is connected to the first end of the sixth resistor R6 and the input end of the third conditioning device through the fifth resistor R5, the second end of the sixth resistor R6 is connected to the second end of the third detection interface, the control end of the third conditioning device is connected to the IO3 end of the first controller U1, the power supply end of the third conditioning device is connected to the output end of the third power supply device, the control end of the third power supply device is connected to the cathode of the sixth diode D6, the anode of the sixth diode D6 is connected to the IO6 end of the first controller U1, and the input end of the third power supply device is connected to the second output end of the multi-channel regulator T2.

[0028] In a specific embodiment, the type of the third conditioning device is the same as that of the first conditioning device; the circuit composition structure of the third power supply device is the same as that of the fifth power tube Q5, the eighth resistor R8 and the second switch tube V2.

[0029] Further, the sampling and superposition module 6 includes a first diode D1, a second diode D2, a third diode D3, a first transformer B1, a second transformer B2, a third transformer B3, a first power tube Q1, a second power tube Q2, a third power tube Q3, a first capacitor C1 and a first rectifier T1; Specifically, the anode of the first diode D1 is connected to the first end of the second resistor R2, the anode of the second diode D2 and the anode of the third diode D3 are connected to the first end of the fourth resistor R4 and the first end of the sixth resistor R6 respectively, the cathode of the first diode D1 is connected to the first end of the primary side of the first transformer B1, the second end of the primary side of the first transformer B1 is connected to the drain of the first power tube Q1, the gate of the first power tube Q1 is connected to the IO4 terminal of the first controller U1, the cathode of the third diode D3 is connected to the first end of the primary side of the third transformer B3, the second end of the primary side of the third transformer B3 is connected to the drain of the third power tube Q3, the gate of the third power tube Q3 is connected to the IO6 terminal of the first controller U1, and the cathode of the second diode D2 is connected to the The first end of the primary side of the second transformer B2 is connected to the drain of the second power tube Q2, the gate of the second power tube Q2 is connected to the IO5 terminal of the first controller U1, the source of the first power tube Q1, the source of the second power tube Q2 and the source of the third power tube Q3 are all grounded, the first end of the secondary side of the first transformer B1 is connected to the second end of the secondary side of the third transformer B3, the first end of the secondary side of the third transformer B3 is connected to the second end of the secondary side of the second transformer B2, the first end of the secondary side of the second transformer B2 is connected to one end of the first capacitor C1 and the first end of the first rectifier T1, and the other end of the first capacitor C1 is connected to the second end of the first rectifier T1 and the second end of the secondary side of the first transformer B1.

[0030] In a specific embodiment, the first power tube Q1, the second power tube Q2 and the third power tube Q3 can all be N-channel field effect tubes, which respectively control the first transformer B1, the second transformer B2 and the third transformer B3 to perform isolation transformation.

[0031] Further, the energy storage control module 7 includes a sixth power tube Q6, a seventh diode D7, an eighth diode D8, a ninth diode D9 and an energy storage device; Specifically, the drain of the sixth power tube Q6 is connected to the third end of the first rectifier T1, the source of the sixth power tube Q6 is connected to the first end of the energy storage device and the discharge control module 8, the gate of the sixth power tube Q6 is connected to the cathode of the seventh diode D7, the cathode of the eighth diode D8 and the cathode of the ninth diode D9, the second end of the energy storage device is connected to the fourth end of the first rectifier T1 and the ground end, and the anode of the seventh diode D7, the anode of the eighth diode D8 and the anode of the ninth diode D9 are respectively connected to the IO4 end, the IO5 end and the IO6 end of the first controller U1.

[0032] In a specific embodiment, the sixth power tube Q6 may be an N-channel field effect tube; and the energy storage device may be a battery.

[0033] Further, the discharge control module 8 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a tenth diode D10, a first logic chip U2 and a seventh power tube Q7; Specifically, the drain of the seventh power tube Q7 is connected to the first end of the energy storage device and is connected to one end of the eleventh resistor R11 and one end of the tenth resistor R10 through the ninth resistor R9, the other end of the eleventh resistor R11 is connected to the cathode of the tenth diode D10, the anode of the tenth diode D10 is connected to the B end of the first logic chip U2, the Y end of the first logic chip U2 is connected to the gate of the seventh power tube Q7, the A end of the first logic chip U2 is connected to the IO7 end of the first controller U1, and the source of the seventh power tube Q7 is connected to the input end of the multi-channel regulator T2.

[0034] In a specific embodiment, the first logic chip U2 can use an N-channel field effect transistor; the ninth resistor R9 and the tenth resistor R10 perform voltage division processing, the eleventh resistor R11 and the tenth diode D10 set the full power threshold, and when the electric energy after the voltage division of the ninth resistor R9 and the tenth resistor R10 exceeds the full power threshold, the tenth diode D10 is broken down.

[0035] In a power supply safety monitoring circuit of the present embodiment, a power supply interface is connected to DC power, a fourth power tube Q4 is turned on and transmits DC power, a multi-channel voltage regulator T2 performs voltage regulation processing on the DC power, and a fifth power tube Q5 is used to power the first conditioning device, the second power supply device, the third power supply device, and the VCC terminal of the first controller U1. The first detection interface is connected to the first power supply terminal of the electrical equipment, the first resistor R1 and the second resistor R2 perform voltage division sampling, and the first conditioning device performs signal amplification and filtering, and the signal is received by the IO1 terminal of the first controller U1. Similarly, the second detection interface is connected to the second power supply terminal of the electrical equipment, and the third resistor R3, the fourth resistor R4 and the second conditioning device perform voltage division sampling and signal After the signal conditioning processing, it is received by the IO2 terminal of the first controller U1, the third detection interface is connected to the third power supply terminal of the electrical equipment, and the fifth resistor R5, the sixth resistor R6 and the third conditioning device perform voltage division sampling and signal conditioning, and then it is received by the IO3 terminal of the first controller U1. If there is no need to perform voltage sampling on the power supply terminal connected to the first detection interface, the IO4 terminal of the first controller U1 outputs the first control signal and controls the first power tube Q1 to be turned on, cooperates with the first transformer B1 to perform isolation transformation processing, controls the second switch tube V2 to be turned on, so that the fifth power tube Q5 is turned off, and the first conditioning device stops working. The electric energy transmitted by the first transformer B1 is transmitted to the first rectifier through the secondary side of the second transformer B2 and the secondary side of the third transformer B3. The first rectifier T1 is used for rectification processing. At this time, the IO4 end of the first controller U1 also controls the sixth power tube Q6 to be turned on, so that the processed signal electric energy is transmitted to the energy storage device and stored by the energy storage device. Similarly, when the power supply end connected to the second detection interface does not need to perform signal detection, the second power supply device stops supplying power to the second conditioning device, but the signal voltage sampled by the second detection interface will be isolated and transformed by the second transformer B2 and transmitted to the energy storage device for storage. When the power supply end connected to the third detection interface does not need to perform signal detection, the signal voltage sampled by the third detection interface will be isolated and transformed by the third transformer B3 and transmitted to the energy storage device for storage. If two or three of the three detection interfaces do not need to be detected, During signal detection, the transformer to which it belongs will perform superposition processing on the voltage of the signal detected by the detection interface, and then store it in the energy storage device. For example, when neither the first detection interface nor the second detection interface needs to perform signal detection, the electric energy after isolation and transformation of the first transformer B1 will be superimposed with the electric energy after isolation and transformation of the second transformer B2, and then transmitted to the energy storage device for storage. When the energy storage device is fully charged, the tenth diode D10 breaks down, and the B terminal of the first logic chip U2 becomes a high level. When an abnormality occurs in the power interface, the IO7 terminal of the first controller U1 can output a switching signal and control the first switch tube V1 to turn on, the fourth power tube Q4 to turn off, and control the A terminal of the first logic chip U2 to become a high level. The first logic chip U2 will control the seventh power tube Q7 to turn on.The energy storage device discharges and supplies power to the multi-channel regulator T2 to maintain power supply monitoring.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0037] 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. A power supply safety monitoring circuit, characterized in that: The power supply safety monitoring circuit comprises: a power supply module, a first power supply sampling module, a second power supply sampling module, a third power supply sampling module, a central control module, a sampling superposition module, an energy storage control module and a discharge control module; The power supply module is connected to the central control module and the discharge control module, and is used to access direct current power and perform power transmission and multi-channel voltage regulation processing. When receiving a switching signal output by the central control module, the power transmission work is stopped, and when receiving the standby power output by the discharge control module, the multi-channel voltage regulation processing is performed; The first power supply sampling module is connected to the power supply module and the central control module, and is used to perform voltage division sampling processing on the connected first power supply end and output a first sampling signal, receive the electric energy output by the power supply module, perform signal conditioning on the first sampling signal and output a first data signal, and stop the electric energy reception and signal conditioning work when receiving the first control signal output by the central control module; The second power supply sampling module is connected to the power supply module and the central control module, and is used to perform voltage division sampling processing on the connected second power supply end and output a second sampling signal, receive the electric energy output by the power supply module, perform signal conditioning on the second sampling signal and output a second data signal, and stop the electric energy reception and signal conditioning work when receiving the second control signal output by the central control module; The third power supply sampling module is connected to the power supply module and the central control module, and is used to perform voltage division sampling processing on the connected third power supply end and output a third sampling signal, receive the electric energy output by the power supply module, perform signal conditioning on the third sampling signal and output a third data signal, and stop the electric energy reception and signal conditioning work when receiving the third control signal output by the central control module; The central control module is used to receive the first data signal, the second data signal and the third data signal, output the first control signal when the first power supply sampling module is not needed for sampling, output the second control signal when the second power supply sampling module is not needed for sampling, output the third control signal when the third power supply sampling module is not needed for sampling, and output the switching signal when the power supply module is abnormal; The sampling and superposition module is connected to the first power supply sampling module, the second power supply sampling module, the third power supply sampling module and the central control module, and is used to adjust the voltage of the first sampling signal and output the first electric energy when receiving the first control signal, adjust the voltage of the second sampling signal and output the second electric energy when receiving the second control signal, and adjust the voltage of the third sampling signal and output the third electric energy when receiving the third control signal, and superimpose, filter and rectify the first electric energy, the second electric energy and the third electric energy and output the fourth electric energy; The energy storage control module is connected to the sampling and superposition module and the central control module, and is used to store fourth electric energy, release the stored electric energy and output standby electric energy when receiving the first control signal, the second control signal or the third control signal; The discharge control module is connected to the central control module and the energy storage control module, and is used to detect that the energy storage control module is fully charged, and when the energy storage control module is fully charged and receives a switching signal, transmits the received standby power to the power supply module.

2. A power supply safety monitoring circuit according to claim 1, characterized in that: The power module includes a power interface, a seventh resistor, a fourth power tube, a first switch tube and a multi-channel regulator; the central control module includes a first controller; The first end of the power interface is connected to the drain of the fourth power tube and is connected to the gate of the fourth power tube and the collector of the first switch tube through the seventh resistor. The emitter of the first switch tube and the second end of the power interface are both grounded. The source of the fourth power tube is connected to the input end of the multi-channel regulator. The base of the first switch tube is connected to the IO7 end of the first controller. The first output end, the second output end, the third output end and the fourth output end of the multi-channel regulator are respectively connected to the first power supply sampling module, the second power supply sampling module, the third power supply sampling module and the VCC end of the first controller.

3. A power supply safety monitoring circuit according to claim 2, characterized in that: The first power supply sampling module includes a first detection interface, a first resistor, a second resistor, a first conditioning device, a fifth power tube, an eighth resistor, a fourth diode and a second switch tube; The first end of the first detection interface is connected to the first end of the second resistor and the input end of the first conditioning device through the first resistor, the second end of the second resistor is connected to the second end of the first detection interface, the output end of the first conditioning device is connected to the IO1 end of the first controller, the power supply end of the first conditioning device is connected to the source of the fifth power tube, the drain of the fifth power tube is connected to the first output end of the multi-channel regulator and connected to the collector of the second switch tube and the gate of the fifth power tube through the eighth resistor, the emitter of the second switch tube is grounded, the base of the second switch tube is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the IO4 end of the first controller.

4. A power supply safety monitoring circuit according to claim 3, characterized in that: The second power supply sampling module includes a second detection interface, a third resistor, a fourth resistor, a second conditioning device, a second power supply device and a fifth diode; The first end of the second detection interface is connected to the first end of the fourth resistor and the input end of the second conditioning device through the third resistor, the second end of the fourth resistor is connected to the second end of the second detection interface, the output end of the second conditioning device is connected to the IO2 end of the first controller, the power supply end of the second conditioning device is connected to the output end of the second power supply device, the input end of the second power supply device is connected to the second output end of the multi-channel regulator, the control end of the second power supply device is connected to the cathode of the fifth diode, and the anode of the fifth diode is connected to the IO5 end of the first controller.

5. A power supply safety monitoring circuit according to claim 4, characterized in that: The third power supply sampling module includes a third detection interface, a fifth resistor, a sixth resistor, a third power supply device, a third conditioning device and a sixth diode; The first end of the third detection interface is connected to the first end of the sixth resistor and the input end of the third conditioning device through the fifth resistor, the second end of the sixth resistor is connected to the second end of the third detection interface, the control end of the third conditioning device is connected to the IO3 end of the first controller, the power supply end of the third conditioning device is connected to the output end of the third power supply device, the control end of the third power supply device is connected to the cathode of the sixth diode, the anode of the sixth diode is connected to the IO6 end of the first controller, and the input end of the third power supply device is connected to the second output end of the multi-channel regulator.

6. A power supply safety monitoring circuit according to claim 5, characterized in that: The sampling and superposition module includes a first diode, a second diode, a third diode, a first transformer, a second transformer, a third transformer, a first power tube, a second power tube, a third power tube, a first capacitor and a first rectifier; The anode of the first diode is connected to the first end of the second resistor, the anodes of the second diode and the third diode are connected to the first end of the fourth resistor and the first end of the sixth resistor respectively, the cathode of the first diode is connected to the first end of the primary side of the first transformer, the second end of the primary side of the first transformer is connected to the drain of the first power tube, the gate of the first power tube is connected to the IO4 terminal of the first controller, the cathode of the third diode is connected to the first end of the primary side of the third transformer, the second end of the primary side of the third transformer is connected to the drain of the third power tube, the gate of the third power tube is connected to the IO6 terminal of the first controller, and the cathode of the second diode is connected to the first end of the primary side of the third transformer. The first end of the primary side of the second transformer and the second end of the primary side of the second transformer are connected to the drain of the second power tube, the gate of the second power tube is connected to the IO5 terminal of the first controller, the source of the first power tube, the source of the second power tube and the source of the third power tube are all grounded, the first end of the secondary side of the first transformer is connected to the second end of the secondary side of the third transformer, the first end of the secondary side of the third transformer is connected to the second end of the secondary side of the second transformer, the first end of the secondary side of the second transformer is connected to one end of the first capacitor and the first end of the first rectifier, and the other end of the first capacitor is connected to the second end of the first rectifier and the second end of the secondary side of the first transformer.

7. A power supply safety monitoring circuit according to claim 6, characterized in that: The energy storage control module includes a sixth power tube, a seventh diode, an eighth diode, a ninth diode and an energy storage device; The drain of the sixth power tube is connected to the third end of the first rectifier, the source of the sixth power tube is connected to the first end of the energy storage device and the discharge control module, the gate of the sixth power tube is connected to the cathode of the seventh diode, the cathode of the eighth diode and the cathode of the ninth diode, the second end of the energy storage device is connected to the fourth end of the first rectifier and the ground end, and the anode of the seventh diode, the anode of the eighth diode and the anode of the ninth diode are respectively connected to the IO4 end, the IO5 end and the IO6 end of the first controller.

8. A power supply safety monitoring circuit according to claim 7, characterized in that: The discharge control module includes a ninth resistor, a tenth resistor, an eleventh resistor, a tenth diode, a first logic chip and a seventh power tube; The drain of the seventh power tube is connected to the first end of the energy storage device and is connected to one end of the eleventh resistor and one end of the tenth resistor through the ninth resistor. The other end of the eleventh resistor is connected to the cathode of the tenth diode. The anode of the tenth diode is connected to the B end of the first logic chip. The Y end of the first logic chip is connected to the gate of the seventh power tube. The A end of the first logic chip is connected to the IO7 end of the first controller. The source of the seventh power tube is connected to the input end of the multi-channel regulator.

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