A high voltage safety detection alarm circuit

Abstract

The present invention discloses a high-voltage safety detection alarm circuit, which relates to the technical field of high-voltage alarms, and includes a power module for accessing AC power, power transmission and power processing; an output module for power reception; a voltage sampling module for isolating voltage sampling and signal processing; a voltage phase difference module for phase shifting and signal superposition; a change degree detection module for detecting whether the voltage after signal superposition is within a set voltage range and the voltage range is adjusted by an intelligent control module; an intelligent control module for signal reception and module control; an abnormal alarm module for voltage abnormality alarm and detection of an adjusted voltage range; an isolation trigger module for isolating transmission signals; and an interference alarm module for interference detection and alarm. The high-voltage safety detection alarm circuit of the present invention can quickly and effectively perform voltage abnormality judgment and alarm and power-off protection, and at the same time determine whether the power supply is frequently interfered by the outside world, thereby improving the safety of the high-voltage power supply.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage alarms, in particular to a high-voltage safety detection alarm circuit. Background Art

[0002] With the development of innovative technologies in my country, high-power equipment in the fields of rail transit, power grid, new energy, industrial control, etc. adopts higher working voltage. The detection, control and alarm of these high-voltage power supply systems can ensure the safety of people and equipment. The high-voltage detection and alarm circuit in the prior art generally sets a comparison threshold and performs alarm control when the detected voltage signal exceeds the set comparison threshold to remind relevant staff. However, when the voltage signal exceeds the comparison threshold, it means that the power supply is in a dangerous state and the alarm cannot be issued in time and effectively. In addition, the high voltage is easily affected by electromagnetic interference, which can easily increase the risk of power supply when it is interfered for a long time. The power supply is abnormal due to the inability to detect it in time, so it needs to be improved. Summary of the invention

[0003] The embodiment of the present invention provides a high voltage safety detection alarm circuit to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a high voltage safety detection alarm circuit is provided, comprising: a power supply module, an output module, a voltage sampling module, a voltage phase difference module, a change degree detection module, an intelligent control module, an abnormal alarm module, an isolation trigger module and an interference alarm module;

[0005] A power module, connected to the output module and the abnormal alarm module, for receiving AC power and transmitting the AC power to the output module, and performing power-off protection upon receiving a first alarm signal output by the abnormal alarm module, performing voltage reduction, rectification, filtering and voltage stabilization on the AC power and outputting the first power;

[0006] Output module, used to transmit AC power to connected electronic devices;

[0007] A voltage sampling module, connected to the power module, for performing isolated voltage sampling and signal amplification and filtering processing on the AC power and outputting a first voltage signal;

[0008] A voltage phase difference module, connected to the voltage sampling module, configured to perform phase shift processing on the first voltage signal and output a second voltage signal, perform superposition processing on the first voltage signal and the second voltage signal and output a first phase difference signal;

[0009] a change degree detection module, connected to the voltage phase difference module and the intelligent control module, for setting a first voltage threshold, performing absolute value processing on the first phase difference signal, outputting a first control signal when the first phase difference signal or the first phase difference signal after absolute value processing is greater than the first voltage threshold, and adjusting the voltage value of the first voltage threshold when receiving the first pulse signal output by the intelligent control module;

[0010] An intelligent control module, connected to the abnormal alarm module, for receiving a first alarm signal and outputting a first pulse signal and adjusting the duty cycle of the first pulse signal in a timely manner when the first alarm signal is not received, and stopping adjusting a pulse signal when a second control signal output by the abnormal alarm module is received or the first alarm signal is received;

[0011] an abnormal alarm module, connected to the change degree detection module, for receiving a first voltage threshold and outputting a first alarm signal and performing an abnormal alarm when the adjusted first voltage threshold is greater than a set second voltage threshold and a first control signal is received, outputting a third control signal when the first alarm signal is not output, and outputting a second control signal when the adjusted first voltage threshold is less than the set third voltage threshold;

[0012] an isolation trigger module, connected to the change degree detection module and the abnormal alarm module, and configured to isolate and transmit the first control signal and output a first trigger signal upon receiving the third control signal;

[0013] The interference alarm module is connected to the isolation trigger module and the abnormal alarm module, and is used to store the first electric energy when the first trigger signal is received and to issue a frequent interference alarm when the stored voltage reaches a set trigger voltage.

[0014] As a further solution of the present invention: the power module includes a power port, a voltage conversion device, a first circuit breaker and a first circuit breaker; the output module includes an output port;

[0015] Preferably, the first end of the power port is connected to the first input end of the voltage conversion device and the first static end of the first circuit breaker, the second end of the power port is connected to the second input end of the voltage conversion device and the second static end of the first circuit breaker, the first moving end and the second moving end of the first circuit breaker are respectively connected to the first end and the second end of the output port, the output end of the voltage conversion device is connected to the interference alarm module and the isolation trigger module, and the control end of the first circuit breaker is connected to the abnormal alarm module.

[0016] As a further solution of the present invention: the voltage sampling module includes a first mutual inductor and a signal conditioning device; the voltage phase difference module includes an eighth resistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a seventh resistor, a first operational amplifier, a second capacitor and a first capacitor;

[0017] Preferably, the first end and the second end of the first mutual inductor are connected to the first end and the second end of the power port respectively, the third end and the fourth end of the first mutual inductor are connected to the first end and the second end of the signal conditioning device respectively, the third end of the signal conditioning device is connected to the first end of the eighth resistor and is connected to the inverting end of the first operational amplifier and one end of the third resistor through the first resistor and the second capacitor in sequence, the other end of the third resistor is connected to one end of the second resistor through the first capacitor, the in-phase end of the first operational amplifier is connected to one end of the fourth resistor and is connected to the output end of the first operational amplifier and one end of the seventh resistor through the fifth resistor, the other end of the seventh resistor is connected to the second end of the eighth resistor and the degree of change detection module, and the other end of the second resistor is connected to the other end of the fourth resistor, the fourth end of the signal conditioning device and the ground.

[0018] As a further solution of the present invention: the change degree detection module includes a first comparator, a second comparator, a first diode, a second diode, an absolute value device, a first power supply, a tenth resistor, a ninth resistor, a first power tube and a sixth resistor; the intelligent control module includes a first controller;

[0019] Preferably, the in-phase end of the first comparator is connected to the input end of the absolute value device and the second end of the eighth resistor, the output end of the absolute value device is connected to the in-phase end of the second comparator, the inverting end of the first comparator is connected to the inverting end of the second comparator, the drain of the first power tube and the abnormal alarm module and the first power supply and the tenth resistor through the ninth resistor, the other end of the tenth resistor is connected to the IO1 end of the first controller and the gate of the first power tube, the source of the first power tube is grounded through the sixth resistor, the output end of the first comparator and the output end of the second comparator are respectively connected to the anode of the first diode and the anode of the second diode, and the cathode of the first diode is connected to the cathode of the second diode.

[0020] As a further solution of the present invention: the isolation trigger module includes a first analog switch, an eleventh resistor, a twelfth resistor, a first optical coupler and a thirteenth resistor;

[0021] Preferably, the IN end of the first analog switch is connected to the cathode of the first diode, the CTRL end of the first analog switch is connected to the abnormal alarm module, the OUT end of the first analog switch is connected to the first end of the first optocoupler through the eleventh resistor, the second end of the first optocoupler is grounded, the third end of the first optocoupler is connected to the output end of the voltage conversion device through the twelfth resistor, the fourth end of the first optocoupler is connected to the interference alarm module and the first end of the thirteenth resistor, and the second end of the thirteenth resistor is grounded.

[0022] As a further solution of the present invention: the interference alarm module includes a fifteenth resistor, a first switch tube, a sixteenth resistor, a third capacitor, a second switch tube, an eighteenth resistor, a seventeenth resistor and a second speaker;

[0023] Preferably, the base of the first switching tube is connected to the first end of the thirteenth resistor, the collector of the first switching tube is connected to the collector of the second switching tube and is connected to the output end of the voltage conversion device through the fifteenth resistor, the emitter of the first switching tube is connected to one end of the sixteenth resistor and one end of the third capacitor and is connected to the base of the second switching tube through the eighteenth resistor, and the emitter of the second switching tube is connected to one end of the second speaker and is connected to the other end of the second speaker, the other end of the third capacitor, the other end of the sixteenth resistor and the ground through the seventeenth resistor.

[0024] As a further solution of the present invention: the abnormal alarm module includes a third comparator, a fourth comparator, a first threshold device, a second threshold device, a first inverter, a first logic chip, a fourteenth resistor and a first speaker;

[0025] Preferably, the inverting end of the third comparator is connected to the inverting end of the fourth comparator and the drain of the first power tube, the inverting end of the third comparator is connected to the first threshold device, the non-inverting end of the fourth comparator is connected to the second threshold device, the output end of the third comparator is connected to the A end of the first logic chip and the input end of the first inverter, the B end of the first logic chip is connected to the cathode of the first diode, the Y end of the first logic chip is connected to one end of the first speaker and the control end of the first circuit breaker and is connected to the IO3 end of the first controller through the fourteenth resistor, the output end of the first inverter is connected to the CTRL end of the first analog switch, and the output end of the fourth comparator is connected to the IO2 end of the first controller.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the high-voltage safety detection alarm circuit of the present invention can perform voltage sampling and voltage change detection processing on the AC power connected to the power module by the voltage sampling module in cooperation with the voltage phase difference module; when the voltage change degree of the change degree detection module exceeds the set voltage range, the abnormal alarm module issues a voltage abnormality alarm and controls the power supply module to cut off power; when the change degree detection module fails to detect the voltage abnormality, the intelligent control module adjusts the voltage range set by the change degree detection module and the detection sensitivity; as the detected voltage range narrows, it is then detected whether the power connected to the power module is frequently transformed due to electromagnetic interference, and when the transformation frequency reaches a certain level, the interference alarm module performs interference pre-alarm processing to determine whether the power supply is frequently interfered with by the outside world, thereby improving the safety of the high-voltage power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 A schematic block diagram of a high voltage safety detection alarm circuit provided by an embodiment of the present invention.

[0029] Figure 2 A circuit diagram of a high voltage safety detection alarm circuit provided by an embodiment of the present invention.

[0030] Figure 3 A circuit diagram of an abnormality alarm module provided in an embodiment of the present invention.

[0031] Figure 4 A circuit diagram of an interference alarm module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] 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.

[0033] In one embodiment, see Figure 1 , a high voltage safety detection alarm circuit, comprising: a power supply module 1, an output module 2, a voltage sampling module 3, a voltage phase difference module 4, a change degree detection module 5, an intelligent control module 6, an abnormal alarm module 7, an isolation trigger module 8 and an interference alarm module 9;

[0034] Specifically, the power supply module 1 is connected to the output module 2 and the abnormal alarm module 7, and is used to receive the AC power and transmit the AC power to the output module 2. When receiving the first alarm signal output by the abnormal alarm module 7, the power supply module 1 performs power-off protection, performs voltage reduction, rectification, filtering and voltage stabilization on the AC power, and outputs the first power.

[0035] The output module 2 is used to transmit AC power to the connected electronic equipment;

[0036] A voltage sampling module 3, connected to the power module 1, for performing isolation voltage sampling and signal amplification and filtering processing on the AC power and outputting a first voltage signal;

[0037] A voltage phase difference module 4 is connected to the voltage sampling module 3, and is used to perform phase shift processing on the first voltage signal and output a second voltage signal, and to perform superposition processing on the first voltage signal and the second voltage signal and output a first phase difference signal;

[0038] The change degree detection module 5 is connected to the voltage phase difference module 4 and the intelligent control module 6, and is used to set a first voltage threshold, perform absolute value processing on the first phase difference signal, and output a first control signal when the first phase difference signal or the first phase difference signal after absolute value processing is greater than the first voltage threshold, and adjust the voltage value of the first voltage threshold when receiving the first pulse signal output by the intelligent control module 6;

[0039] The intelligent control module 6 is connected to the abnormal alarm module 7, and is used to receive the first alarm signal and output the first pulse signal and adjust the duty cycle of the first pulse signal in a timely manner when the first alarm signal is not received, and stop adjusting the pulse signal when the second control signal output by the abnormal alarm module 7 or the first alarm signal is received;

[0040] The abnormal alarm module 7 is connected to the change degree detection module 5, and is used to receive the first voltage threshold and output the first alarm signal and perform an abnormal alarm when the adjusted first voltage threshold is greater than the set second voltage threshold and the first control signal is received, and output the third control signal when the first alarm signal is not output, and output the second control signal when the adjusted first voltage threshold is less than the set third voltage threshold;

[0041] an isolation trigger module 8, connected to the change degree detection module 5 and the abnormal alarm module 7, and configured to isolate and transmit the first control signal and output a first trigger signal when receiving the third control signal;

[0042] The interference alarm module 9 is connected to the isolation trigger module 8 and the abnormal alarm module 7, and is used to store the first electric energy when receiving the first trigger signal and to issue a frequent interference alarm when the stored voltage reaches a set trigger voltage.

[0043] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of a power port, a circuit breaker, a voltage conversion device, etc., which can be connected to AC power, control the transmission of power, and perform voltage reduction, rectification, filtering and voltage stabilization on the AC power; the output module 2 can adopt an output circuit composed of an output port, which is connected to an electronic device and receives power; the voltage sampling module 3 can adopt a voltage sampling circuit composed of a voltage transformer and a signal conditioning device, perform voltage sampling and amplify and filter the sampled signal; the voltage phase difference module 4 can adopt a voltage phase circuit composed of an operational amplifier, a resistor and a capacitor, which can perform voltage sampling. The signal output by module 3 is subjected to 180-degree phase shift processing, and the phase-shifted signal is superimposed with the signal output by voltage sampling module 3. At this time, if there is no abnormal voltage change in the AC power, the potential of the superimposed signal is zero; the above-mentioned change degree detection module 5 can adopt a change degree detection circuit composed of a comparator, a field effect transistor, an absolute value device, etc., to set a first voltage threshold. The sensitivity of voltage anomaly detection can be set by reasonably selecting the voltage value of the first voltage threshold. When the superimposed signal or the signal processed by absolute value is greater than the first voltage threshold, it indicates that the voltage is abnormal; the above-mentioned intelligent control module 6 can adopt a single-chip microcomputer composed of The microcontrol circuit integrates many components such as an operator, 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 abnormal alarm module 7 can adopt an abnormal alarm circuit composed of a comparator, a threshold device, an inverter, a logic chip, a speaker, etc., and can set a second voltage threshold and a third voltage threshold. The second voltage threshold is less than the first voltage threshold when it is not adjusted, and the third voltage threshold is less than the second voltage threshold. When the adjusted first voltage threshold is less than the second voltage threshold, the power interference detection starts. When the adjusted first voltage threshold is less than the third voltage threshold, the intelligent control module 6 stops adjusting the first voltage threshold and stops adjusting the sensitivity of the detection. When the adjusted first voltage threshold is greater than the second voltage threshold and the voltage is abnormal, a high-level signal, i.e., a first alarm signal, is output; the above-mentioned isolation trigger module 8 can adopt an isolation trigger circuit composed of a photoelectric coupler, a resistor, an analog switch, etc., and when the second voltage threshold is less than the first voltage threshold when it is not adjusted, signal isolation transmission is performed; the above-mentioned interference alarm module 9 can adopt an interference alarm circuit composed of a transistor, a capacitor, a speaker, etc., which is triggered by the signal output by the isolation trigger module 8 and when the signal output by the isolation trigger module 8 reaches a certain level, an alarm is performed.

[0044] In another embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 , the power module 1 includes a power port, a voltage conversion device, a first circuit breaker K1-1 and a first circuit breaker K1; the output module 2 includes an output port;

[0045] Specifically, the first end of the power port is connected to the first input end of the voltage conversion device and the first static end of the first circuit breaker K1-1, the second end of the power port is connected to the second input end of the voltage conversion device and the second static end of the first circuit breaker K1-1, the first moving end and the second moving end of the first circuit breaker K1-1 are respectively connected to the first end and the second end of the output port, the output end of the voltage conversion device is connected to the interference alarm module 9 and the isolation trigger module 8, and the control end of the first circuit breaker K1 is connected to the abnormal alarm module 7.

[0046] In a specific embodiment, the voltage conversion device may be composed of a transformer, a rectifier, a capacitor and a voltage stabilizer; the first circuit breaker K1 controls the first circuit breaker K1-1 to be disconnected by magnetic attraction, and the first circuit breaker K1-1 may be a normally closed switch.

[0047] Further, the voltage sampling module 3 includes a first mutual inductor PT1 and a signal conditioning device; the voltage phase difference module 4 includes an eighth resistor R8, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a seventh resistor R7, a first operational amplifier OP1, a second capacitor C2 and a first capacitor C1;

[0048] Specifically, the first end and the second end of the first mutual inductor PT1 are respectively connected to the first end and the second end of the power port, the third end and the fourth end of the first mutual inductor PT1 are respectively connected to the first end and the second end of the signal conditioning device, the third end of the signal conditioning device is connected to the first end of the eighth resistor R8 and is connected to the inverting end of the first operational amplifier OP1 and one end of the third resistor R3 through the first resistor R1 and the second capacitor C2 in sequence, the other end of the third resistor R3 is connected to one end of the second resistor R2 through the first capacitor C1, the in-phase end of the first operational amplifier OP1 is connected to one end of the fourth resistor R4 and is connected to the output end of the first operational amplifier OP1 and one end of the seventh resistor R7 through the fifth resistor R5, the other end of the seventh resistor R7 is connected to the second end of the eighth resistor R8 and the change degree detection module 5, and the other end of the second resistor R2 is connected to the other end of the fourth resistor R4, the fourth end of the signal conditioning device and the ground end.

[0049] In a specific embodiment, the first transformer PT1 can be a voltage transformer; the signal conditioning device can be composed of an operational amplifier, a resistor and a capacitor to perform signal amplification and filtering processing; the first operational amplifier OP1 can be an OP07 operational amplifier, which cooperates with the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the seventh resistor R7, the second capacitor C2 and the first capacitor C1 to perform 180-degree phase shift processing, and the signal transmitted by the eighth resistor R8 is superimposed.

[0050] Further, the change degree detection module 5 includes a first comparator A1, a second comparator A2, a first diode D1, a second diode D2, an absolute value device, a first power supply VCC1, a tenth resistor R10, a ninth resistor R9, a first power tube Q1 and a sixth resistor R6; the intelligent control module 6 includes a first controller U1;

[0051] Specifically, the in-phase end of the first comparator A1 is connected to the input end of the absolute value device and the second end of the eighth resistor R8, the output end of the absolute value device is connected to the in-phase end of the second comparator A2, the inverting end of the first comparator A1 is connected to the inverting end of the second comparator A2, the drain of the first power tube Q1 and the abnormal alarm module 7, and is connected to the first power supply VCC1 and the tenth resistor R10 through the ninth resistor R9, the other end of the tenth resistor R10 is connected to the IO1 end of the first controller U1 and the gate of the first power tube Q1, the source of the first power tube Q1 is grounded through the sixth resistor R6, the output end of the first comparator A1 and the output end of the second comparator A2 are respectively connected to the anode of the first diode D1 and the anode of the second diode D2, and the cathode of the first diode D1 is connected to the cathode of the second diode D2.

[0052] In a specific embodiment, the first controller U1 may use an STM32 single-chip microcomputer; the first comparator A1 and the second comparator A2 may use LM358 comparators; the first power tube Q1 may use an N-channel field effect tube, and the first power supply VCC1, the ninth resistor R9, the sixth resistor R6 and the tenth resistor R10 are used to set the first voltage threshold. The first pulse signal output from the IO1 terminal of the first controller U1 can adjust the voltage value of the first voltage threshold, specifically, reduce the voltage value of the first voltage threshold; the absolute value device may be composed of an operational amplifier, a capacitor, a resistor and a voltage regulator, and performs absolute value processing on the negative value of the input.

[0053] Further, the isolation trigger module 8 includes a first analog switch U3, an eleventh resistor R11, a twelfth resistor R12, a first optical coupler U2 and a thirteenth resistor R13;

[0054] Specifically, the IN end of the first analog switch U3 is connected to the cathode of the first diode D1, the CTRL end of the first analog switch U3 is connected to the abnormal alarm module 7, the OUT end of the first analog switch U3 is connected to the first end of the first optocoupler U2 through the eleventh resistor R11, the second end of the first optocoupler U2 is grounded, the third end of the first optocoupler U2 is connected to the output end of the voltage conversion device through the twelfth resistor R12, the fourth end of the first optocoupler U2 is connected to the interference alarm module 9 and the first end of the thirteenth resistor R13, and the second end of the thirteenth resistor R13 is grounded.

[0055] In a specific embodiment, the first analog switch U3 may be CD4066; the first optical coupler U2 may be PC817 photoelectric coupler.

[0056] Further, the interference alarm module 9 includes a fifteenth resistor R15, a first switch tube V1, a sixteenth resistor R16, a third capacitor C3, a second switch tube V2, an eighteenth resistor R18, a seventeenth resistor R17 and a second speaker BL2;

[0057] Specifically, the base of the first switching tube V1 is connected to the first end of the thirteenth resistor R13, the collector of the first switching tube V1 is connected to the collector of the second switching tube V2 and is connected to the output end of the voltage conversion device through the fifteenth resistor R15, the emitter of the first switching tube V1 is connected to one end of the sixteenth resistor R16 and one end of the third capacitor C3 and is connected to the base of the second switching tube V2 through the eighteenth resistor R18, and the emitter of the second switching tube V2 is connected to one end of the second speaker BL2 and is connected to the other end of the second speaker BL2, the other end of the third capacitor C3, the other end of the sixteenth resistor R16 and the ground through the seventeenth resistor R17.

[0058] In a specific embodiment, the first switch tube V1 and the second switch tube V2 may be NPN transistors; the third capacitor C3 stores energy, and cooperates with the sixteenth resistor R16 and the eighteenth resistor R18 to trigger the second switch tube V2 to turn on when the electric energy stored in the third capacitor C3 reaches the turn-on voltage of the second switch tube V2.

[0059] Further, the abnormal alarm module 7 includes a third comparator A3, a fourth comparator A4, a first threshold device, a second threshold device, a first inverter INV1, a first logic chip J1, a fourteenth resistor R14 and a first speaker BL1;

[0060] Specifically, the third comparator A3 is connected to the inverting end of the fourth comparator A4 and the drain of the first power tube Q1, the inverting end of the third comparator A3 is connected to the first threshold device, the non-inverting end of the fourth comparator A4 is connected to the second threshold device, the output end of the third comparator A3 is connected to the A end of the first logic chip J1 and the input end of the first inverter INV1, the B end of the first logic chip J1 is connected to the cathode of the first diode D1, the Y end of the first logic chip J1 is connected to one end of the first speaker BL1 and the control end of the first circuit breaker K1 and is connected to the IO3 end of the first controller U1 through the fourteenth resistor R14, the output end of the first inverter INV1 is connected to the CTRL end of the first analog switch U3, and the output end of the fourth comparator A4 is connected to the IO2 end of the first controller U1.

[0061] In a specific embodiment, the third comparator A3 and the fourth comparator A4 can both use LM358 comparators; the first threshold device can be composed of a reference power supply and a resistor to provide a second voltage threshold, and the second threshold device can be composed of a reference power supply and a resistor to provide a third voltage threshold; the first inverter INV1 can use a NOT gate chip; the first logic chip J1 can use an AND gate chip.

[0062] In a high-voltage safety detection alarm circuit of the present embodiment, AC power is connected to the power port and transmitted to the electronic device connected to the output port through the first circuit breaker K1-1, the first transformer PT1 performs voltage sampling on the AC power, the signal conditioning device performs signal amplification and filtering processing and outputs a first voltage signal, the first voltage signal is phase-shifted by the first operational amplifier OP1, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the seventh resistor R7, the first capacitor C1 and the second capacitor C2, and then superimposed with the signal transmitted by the eighth resistor R8 and outputs a first phase difference signal. When the phase difference signal is zero, it indicates that the AC power is stable. When the first phase difference signal or the first phase difference signal processed by the absolute value device is greater than the first voltage threshold set by the first power supply VCC1, the tenth resistor R10, the ninth resistor R9, the first power tube Q1 and the sixth resistor R6, the first comparator A1 or the second comparator A2 will output a high level, both of which make the B end of the first logic chip J1 become a high level. At the same time, because the first voltage threshold is not adjusted, it is greater than the second voltage threshold set by the first threshold device, the third comparator A3 outputs a high level, and the first logic chip J1 will output a first alarm signal to control the first speaker BL1 to perform voltage Abnormal alarm, the first circuit breaker K1 controls the first circuit breaker K1-1 to disconnect. If the first phase difference signal is not greater than the first voltage threshold at this time, the IO1 end of the first controller U1 will output a first pulse signal, which will reduce the voltage of the first voltage threshold, adjust the detection sensitivity, and narrow the voltage detection range of the first phase difference signal. When the voltage of the adjusted first voltage threshold is less than the second voltage threshold, power interference detection will be performed. Specifically, the IO1 end of the first controller U1 adjusts the conduction state of the first power tube Q1, reduces the voltage value of the first voltage threshold, and further narrows the voltage detection range of the first phase difference signal. The first inverter IN V1 triggers the first analog switch U3 to turn on. When the voltage changes, it means that the voltage is disturbed and floats. The first optocoupler U2 transmits the high level output by the first comparator A1 or the second comparator A2, and then triggers the first switch tube V1 to turn on. The third capacitor C3 stores electrical energy. When the voltage change frequency exceeds a certain number of times, the electrical energy stored in the third capacitor C3 will trigger the second switch tube V2 to turn on, and the second speaker BL2 will alarm, indicating that the power supply is frequently disturbed by the outside world. When the adjusted first voltage threshold is less than the third voltage threshold set by the second threshold device, the IO1 end of the first controller U1 stops adjusting the first power tube Q1.

[0063] 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.

[0064] 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 high voltage safety detection alarm circuit, characterized in that: The high voltage safety detection alarm circuit includes: a power supply module, an output module, a voltage sampling module, a voltage phase difference module, a change degree detection module, an intelligent control module, an abnormal alarm module, an isolation trigger module and an interference alarm module; The power supply module is connected to the output module and the abnormal alarm module, and is used to receive the AC power and transmit the AC power to the output module. When receiving the first alarm signal output by the abnormal alarm module, the power supply module performs power-off protection, performs voltage reduction, rectification, filtering and voltage stabilization on the AC power, and outputs the first power. The output module is used to transmit AC power to the connected electronic device; The voltage sampling module is connected to the power supply module and is used to perform isolation voltage sampling and signal amplification and filtering on the AC power and output a first voltage signal; The voltage phase difference module is connected to the voltage sampling module, and is used to perform phase shift processing on the first voltage signal and output a second voltage signal, and to perform superposition processing on the first voltage signal and the second voltage signal and output a first phase difference signal; The change degree detection module is connected to the voltage phase difference module and the intelligent control module, and is used to set a first voltage threshold, perform absolute value processing on the first phase difference signal, output a first control signal when the first phase difference signal or the first phase difference signal after absolute value processing is greater than the first voltage threshold, and adjust the voltage value of the first voltage threshold when receiving the first pulse signal output by the intelligent control module; The intelligent control module is connected to the abnormal alarm module, and is used to receive the first alarm signal and output the first pulse signal and adjust the duty cycle of the first pulse signal in a timely manner when the first alarm signal is not received, and stop adjusting the pulse signal when the second control signal output by the abnormal alarm module is received or the first alarm signal is received; The abnormal alarm module is connected to the change degree detection module, and is used to receive the first voltage threshold and output a first alarm signal and perform an abnormal alarm when the adjusted first voltage threshold is greater than the set second voltage threshold and the first control signal is received, and output a third control signal when the first alarm signal is not output, and output a second control signal when the adjusted first voltage threshold is less than the set third voltage threshold; The isolation trigger module is connected to the change degree detection module and the abnormal alarm module, and is used to isolate and transmit the first control signal and output a first trigger signal when receiving the third control signal; The interference alarm module is connected to the isolation trigger module and the abnormal alarm module, and is used to store the first electric energy when a first trigger signal is received and to issue a frequent interference alarm when the stored voltage reaches a set trigger voltage.

2. A high voltage safety detection alarm circuit according to claim 1, characterized in that: The power module includes a power port, a voltage conversion device, a first circuit breaker and a first circuit breaker; the output module includes an output port; The first end of the power port is connected to the first input end of the voltage conversion device and the first static end of the first circuit breaker, the second end of the power port is connected to the second input end of the voltage conversion device and the second static end of the first circuit breaker, the first moving end and the second moving end of the first circuit breaker are respectively connected to the first end and the second end of the output port, the output end of the voltage conversion device is connected to the interference alarm module and the isolation trigger module, and the control end of the first circuit breaker is connected to the abnormal alarm module.

3. A high voltage safety detection alarm circuit according to claim 2, characterized in that: The voltage sampling module includes a first mutual inductor and a signal conditioning device; the voltage phase difference module includes an eighth resistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a seventh resistor, a first operational amplifier, a second capacitor and a first capacitor; The first end and the second end of the first mutual inductor are connected to the first end and the second end of the power port respectively, the third end and the fourth end of the first mutual inductor are connected to the first end and the second end of the signal conditioning device respectively, the third end of the signal conditioning device is connected to the first end of the eighth resistor and is connected to the inverting end of the first operational amplifier and one end of the third resistor through the first resistor and the second capacitor in sequence, the other end of the third resistor is connected to one end of the second resistor through the first capacitor, the in-phase end of the first operational amplifier is connected to one end of the fourth resistor and is connected to the output end of the first operational amplifier and one end of the seventh resistor through the fifth resistor, the other end of the seventh resistor is connected to the second end of the eighth resistor and the change degree detection module, and the other end of the second resistor is connected to the other end of the fourth resistor, the fourth end of the signal conditioning device and the ground.

4. A high voltage safety detection alarm circuit according to claim 3, characterized in that: The change degree detection module includes a first comparator, a second comparator, a first diode, a second diode, an absolute value device, a first power supply, a tenth resistor, a ninth resistor, a first power tube and a sixth resistor; the intelligent control module includes a first controller; The non-inverting end of the first comparator is connected to the input end of the absolute value device and the second end of the eighth resistor, the output end of the absolute value device is connected to the non-inverting end of the second comparator, the inverting end of the first comparator is connected to the inverting end of the second comparator, the drain of the first power tube and the abnormal alarm module, and the first power supply and the tenth resistor are connected through the ninth resistor, the other end of the tenth resistor is connected to the IO1 end of the first controller and the gate of the first power tube, the source of the first power tube is grounded through the sixth resistor, the output end of the first comparator and the output end of the second comparator are respectively connected to the anode of the first diode and the anode of the second diode, and the cathode of the first diode is connected to the cathode of the second diode.

5. A high voltage safety detection alarm circuit according to claim 4, characterized in that: The isolation trigger module includes a first analog switch, an eleventh resistor, a twelfth resistor, a first optical coupler and a thirteenth resistor; The IN end of the first analog switch is connected to the cathode of the first diode, the CTRL end of the first analog switch is connected to the abnormal alarm module, the OUT end of the first analog switch is connected to the first end of the first optocoupler through the eleventh resistor, the second end of the first optocoupler is grounded, the third end of the first optocoupler is connected to the output end of the voltage conversion device through the twelfth resistor, the fourth end of the first optocoupler is connected to the interference alarm module and the first end of the thirteenth resistor, and the second end of the thirteenth resistor is grounded.

6. A high voltage safety detection alarm circuit according to claim 5, characterized in that: The interference alarm module includes a fifteenth resistor, a first switch tube, a sixteenth resistor, a third capacitor, a second switch tube, an eighteenth resistor, a seventeenth resistor and a second speaker; The base of the first switching tube is connected to the first end of the thirteenth resistor, the collector of the first switching tube is connected to the collector of the second switching tube and is connected to the output end of the voltage conversion device through the fifteenth resistor, the emitter of the first switching tube is connected to one end of the sixteenth resistor and one end of the third capacitor and is connected to the base of the second switching tube through the eighteenth resistor, the emitter of the second switching tube is connected to one end of the second speaker and is connected to the other end of the second speaker, the other end of the third capacitor, the other end of the sixteenth resistor and the ground through the seventeenth resistor.

7. A high voltage safety detection alarm circuit according to claim 5, characterized in that: The abnormal alarm module includes a third comparator, a fourth comparator, a first threshold device, a second threshold device, a first inverter, a first logic chip, a fourteenth resistor and a first speaker; The third comparator is connected to the inverting end of the fourth comparator and the drain of the first power tube, the inverting end of the third comparator is connected to the first threshold device, the non-inverting end of the fourth comparator is connected to the second threshold device, the output end of the third comparator is connected to the A end of the first logic chip and the input end of the first inverter, the B end of the first logic chip is connected to the cathode of the first diode, the Y end of the first logic chip is connected to one end of the first speaker and the control end of the first circuit breaker and is connected to the IO3 end of the first controller through the fourteenth resistor, the output end of the first inverter is connected to the CTRL end of the first analog switch, and the output end of the fourth comparator is connected to the IO2 end of the first controller.

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