Surge protector

Abstract

The invention discloses a surge protector. The surge protector is characterized in that a lightning protection module is connected in a signal line; the lightning protection module is used for discharging surge current on the signal line and limiting voltage on the signal line; the monitoring module is coupled with the lightning protection module; the monitoring module generates a surge signal according to the surge current on the signal line; the control module is connected with the monitoring module; the control module obtains a surge voltage amplitude value on the signal line according to the surge signal, accumulates the number of surges borne by the lightning protection module, and generates an alarm signal when the surge voltage amplitude value is greater than or equal to a preset amplitude value and / or the number of surges is greater than or equal to a preset number of times; the alarm module is connected with the control module; the alarm module gives an alarm according to the alarm signal. The surge protector provided by the embodiment of the invention can give an alarm when the surge voltage amplitude is greater than or equal to the preset amplitude and / or the surge frequency is greater than or equal to the preset frequency, thereby warning a user that the surge protector fails, and facilitating the improvement of the use safety and maintainability of the surge protector.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic devices, and in particular to a surge protector. Background Art

[0002] A surge protector is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. The surge protector is designed by combining passive protection electronic devices and connected in parallel in the signal loop. The instrument is installed at the front end of the protected device to suppress transient surges on the signal line. The service life of the surge protector is related to the number of surges the surge protector withstands and the amplitude of the surge voltage. The more surges the surge protector withstands, the greater the amplitude of the surge voltage the surge protector withstands, and the greater the risk of failure of the surge protector.

[0003] However, in the prior art, it is difficult to monitor the number of surges and the amplitude of the surge voltage borne by the surge protector, which also results in low safety and maintainability of the surge protector. Summary of the invention

[0004] The invention provides a surge protector to improve the use safety and maintainability of the surge protector.

[0005] The surge protector includes:

[0006] A lightning protection module, the lightning protection module is connected to the signal line; the lightning protection module is used to discharge the surge current on the signal line and limit the voltage on the signal line;

[0007] A monitoring module, the monitoring module is coupled to the lightning protection module; the monitoring module is used to generate a surge signal according to the surge current on the signal line;

[0008] A control module, the control module is connected to the monitoring module; the control module is used to obtain the surge voltage amplitude on the signal line according to the surge signal, accumulate the number of surges borne by the lightning protection module, and generate an alarm signal when the surge voltage amplitude is greater than or equal to a preset amplitude and / or the number of surges is greater than or equal to a preset number;

[0009] An alarm module is connected to the control module; the alarm module is used to give an alarm according to the alarm signal.

[0010] Optionally, the monitoring module includes a sensing unit, a frequency selection unit, a rectification and filtering unit, and an amplification unit connected in sequence;

[0011] The sensing unit is also coupled to the lightning protection module; the amplification unit is also connected to the control module;

[0012] The sensing unit is used to generate an AC surge signal according to the surge current on the signal line; the frequency selection unit is used to perform frequency selection filtering on the AC surge signal; the rectification and filtering unit is used to convert the AC surge signal into a DC surge signal; the amplification unit is used to amplify the DC surge signal and perform analog-to-digital conversion on the amplified DC surge signal to obtain the surge signal.

[0013] Optionally, the induction unit comprises: at least one induction inductor;

[0014] The inductive inductor is coupled to the lightning protection module; the first end of the inductive inductor is connected to the first input end of the frequency selection unit; the second end of the inductive inductor is connected to the second input end of the frequency selection unit; the first output end and the second output end of the frequency selection unit are both connected to the rectifier and filter unit.

[0015] Optionally, the frequency selection unit includes: a first frequency selection capacitor, a first frequency selection resistor, a second frequency selection capacitor and a second frequency selection resistor;

[0016] The first end of the first frequency-selective capacitor is connected to the induction unit; the second end of the first frequency-selective capacitor is connected to the first end of the first frequency-selective resistor; the second end of the first frequency-selective resistor is connected to the first end of the second frequency-selective capacitor; the second end of the second frequency-selective capacitor is connected to the first end of the second frequency-selective resistor; the second end of the second frequency-selective resistor is connected to the second end of the first frequency-selective capacitor; and the first end of the second frequency-selective resistor is also connected to the induction unit.

[0017] Optionally, the rectification and filtering unit comprises: a rectification bridge, a filtering capacitor and a filtering resistor;

[0018] The first AC end of the rectifier bridge and the second AC end of the rectifier bridge are both connected to the frequency selection unit; the DC positive end of the rectifier bridge is connected to the amplification unit; the DC negative end of the rectifier bridge is grounded; the filter capacitor is connected between the DC positive end of the rectifier bridge and the DC negative end of the rectifier bridge; the filter resistor is connected in parallel with the filter capacitor.

[0019] Optionally, the amplification unit includes: an operational amplifier, a first operational amplifier resistor, a second operational amplifier resistor and an analog-to-digital converter;

[0020] The non-inverting input terminal of the operational amplifier is connected to the rectifier and filter unit; the inverting input terminal of the operational amplifier is connected to the first terminal of the first operational amplifier resistor; the second terminal of the first operational amplifier resistor is grounded; the second operational amplifier resistor is connected between the output terminal of the operational amplifier and the inverting input terminal of the operational amplifier; the output terminal of the operational amplifier is connected to the input terminal of the analog-to-digital converter; the data terminal and the clock terminal of the analog-to-digital converter are both connected to the control module.

[0021] Optionally, the surge protector further comprises: a fault detection module;

[0022] The first end of the fault detection module is connected to the fourth end of the lightning protection module; the second end of the fault detection module is connected to the fifth end of the lightning protection module; the third end of the fault detection module and the fourth end of the fault detection module are both connected to the control module; the first end of the lightning protection module and the second end of the lightning protection module are both connected to the signal source; the third end of the lightning protection module and the fifth end of the lightning protection module are both connected to the receiving source;

[0023] The fault detection module is used to detect whether the lightning protection module is faulty and generate a fault signal when the lightning protection module is faulty; the control module is also used to generate the alarm signal according to the fault signal.

[0024] Optionally, the fault detection module includes: a photoelectric coupler;

[0025] The first end of the light-emitting part of the photoelectric coupler serves as the first end of the fault detection module; the second end of the light-emitting part of the photoelectric coupler serves as the second end of the fault detection module; the first end of the light-receiving part of the photoelectric coupler serves as the third end of the fault detection module; and the second end of the light-receiving part of the photoelectric coupler serves as the fourth end of the fault detection module.

[0026] Optionally, the lightning protection module includes: a first gas discharge tube, a second gas discharge tube, a third gas discharge tube, a first lightning protection inductor, a second lightning protection inductor and a transient suppression diode;

[0027] The first end of the first gas discharge tube and the second end of the first gas discharge tube are both connected to the signal source; the first end of the second gas discharge tube is connected to the first end of the first gas discharge tube; the second end of the second gas discharge tube is grounded; the first end of the third gas discharge tube is connected to the second end of the first gas discharge tube; the second end of the third gas discharge tube is grounded; the first end of the first lightning protection inductor is connected to the first end of the first gas discharge tube; the first end of the second lightning protection inductor is connected to the second end of the first gas discharge tube; the second end of the first lightning protection inductor is connected to the first end of the transient suppression diode; the second end of the transient suppression diode is connected to the fault detection module; the second end of the first lightning protection inductor and the second end of the second lightning protection inductor are both connected to the receiving source.

[0028] Optionally, the surge protector further includes: a temperature detection module;

[0029] The temperature detection module is arranged close to the lightning protection module; the temperature detection module is connected to the control module;

[0030] The temperature detection module is used to obtain the temperature of the lightning protection module; the control module is also used to generate the alarm signal when the temperature of the lightning protection module is greater than or equal to a preset temperature.

[0031] The embodiment of the present invention detects the voltage of the surge in the lightning protection module through the monitoring module, and generates a surge signal according to the detection result. The control module calculates the surge voltage amplitude of the surge borne by the lightning protection module according to the surge signal, and accumulates the number of surges borne by the lightning protection module, and generates an alarm signal when the surge voltage amplitude is greater than or equal to the preset amplitude and / or the number of surges is greater than or equal to the preset number. The alarm module alarms according to the alarm signal to warn the user. The embodiment of the present invention can detect the amplitude of the surge voltage during each surge protection, and can record the number of surges borne by the surge protector. When the surge voltage amplitude is greater than or equal to the preset amplitude and / or the number of surges is greater than or equal to the preset number, an alarm is issued to warn the user that the surge protector has failed, which is conducive to improving the safety of the use of the surge protector.

[0032] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is a schematic diagram of a surge protector provided by an embodiment of the present invention;

[0035] Figure 2 is a circuit schematic diagram of a monitoring module provided by an embodiment of the present invention;

[0036] Figure 3 is a schematic diagram of another surge protector provided by an embodiment of the present invention;

[0037] Figure 4 The schematic diagram of a surge protector provided by an embodiment of the present invention is shown in FIG. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] The embodiment of the present invention provides a surge protector. The surge protector can detect the amplitude of the surge voltage during each surge protection, and can record the number of surges the surge protector has been subjected to, and alarm when the surge voltage amplitude is greater than or equal to a preset amplitude and / or the number of surges is greater than or equal to a preset number, so as to warn the user that the surge protector has failed, thereby improving the safety of use. Figure 1 Schematic diagram of a surge protector provided by an embodiment of the present invention. Figure 1 The surge protector includes: a lightning protection module 110, a monitoring module 120, a control module 130 and an alarm module 140.

[0041] The lightning protection module 110 is connected to the signal line 210; the lightning protection module 110 is used to discharge the surge current on the signal line 210 and limit the voltage on the signal line 210; the monitoring module 120 is coupled to the lightning protection module 110; the monitoring module 120 is used to generate a surge signal according to the surge current on the signal line 210; the control module 130 is connected to the monitoring module 120; the control module 130 is used to obtain the surge voltage amplitude on the signal line 210 according to the surge signal, accumulate the number of surges borne by the lightning protection module 110, and generate an alarm signal when the surge voltage amplitude is greater than or equal to the preset amplitude and / or the number of surges is greater than or equal to the preset number; the alarm module 140 is connected to the control module 130; the alarm module 140 is used to alarm according to the alarm signal.

[0042] Specifically, the signal line 210 is connected to the subsequent device through the lightning protection module 110. When a surge occurs in the signal line 210, the lightning protection module 110 discharges the surge current in the signal line 210 to prevent the surge from impacting the subsequent device connected to the signal line 210. When a surge occurs in the signal line 210, the current in the lightning protection module 110 changes. At this time, due to the change in the current in the lightning protection module 110, an induced electromotive force is induced in the monitoring module 120, and the monitoring module 120 generates a surge signal based on the induced electromotive force.

[0043] The control module 130 obtains the surge signal, and calculates the surge voltage amplitude of the surge of the signal line 210 according to the surge signal, that is, the maximum value of the surge voltage borne by the surge lightning protection module 110. In addition, the control module 130 also counts the number of surges borne by the lightning protection module 110 according to the surge signal. The control module 130 counts the number of surges borne by the lightning protection module 110, for example, by counting, that is, whenever the control module 130 obtains a surge signal, the control module 130 increases the original number of surges by one.

[0044] When the lightning protection module 110 is not subjected to a surge, the number of surges counted by the control module 130 is zero. When the surge voltage amplitude is greater than or equal to the preset amplitude, it means that the maximum voltage of this surge exceeds the maximum voltage that the surge protector can withstand, and it is considered that the surge protector has been broken down and damaged; when the number of surges borne by the lightning protection module 110 is greater than or equal to the preset number of times, it means that the number of times the surge protector has been used has reached the maximum number of times the surge protector has been used, and it is considered that the service life of the surge protector has reached the design life. Among them, the preset amplitude is the maximum voltage that the preset surge protector can withstand; the preset number of times is the maximum number of times the preset surge protector has been used, that is, the service life of the surge protector. The preset amplitude and preset number of times are related to the characteristics of the surge protector itself. Different surge protectors have different preset amplitudes and preset numbers. In actual applications, the preset amplitude and preset number of times can be set according to actual conditions, and this embodiment does not limit this.

[0045] Therefore, when the surge voltage amplitude is greater than or equal to the preset amplitude and / or the surge frequency is greater than or equal to the preset frequency, the control module 130 generates an alarm signal. The alarm module 140 obtains the alarm signal and issues an alarm according to the alarm signal to prompt the user that the surge protector is ineffective.

[0046] The embodiment of the present invention detects the voltage of the surge in the lightning protection module 110 through the monitoring module 120, and generates a surge signal according to the detection result. The control module 130 calculates the surge voltage amplitude of the surge borne by the lightning protection module 110 according to the surge signal, and accumulates the number of surges borne by the lightning protection module 110, and generates an alarm signal when the surge voltage amplitude is greater than or equal to the preset amplitude and / or the number of surges is greater than or equal to the preset number. The alarm module 140 alarms according to the alarm signal to warn the user. The embodiment of the present invention can detect the amplitude of the surge voltage during each surge protection, and can record the number of surges borne by the surge protector. When the surge voltage amplitude is greater than or equal to the preset amplitude and / or the number of surges is greater than or equal to the preset number, an alarm is issued to warn the user that the surge protector has failed, which is conducive to improving the safety and maintainability of the surge protector.

[0047] Figure 2 is a circuit diagram of a monitoring module provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 2 The monitoring module 120 includes a sensing unit 121, a frequency selection unit 122, a rectifying and filtering unit 123 and an amplifying unit 124 which are connected in sequence.

[0048] The sensing unit 121 is also coupled to the lightning protection module 110; the amplifying unit 124 is also connected to the control module 110; the sensing unit 121 is used to generate an AC surge signal according to the surge current on the signal line 210; the frequency selection unit 122 is used to perform frequency selection filtering on the AC surge signal; the rectification and filtering unit 123 is used to convert the AC surge signal into a DC surge signal; the amplifying unit 124 is used to amplify the DC surge signal and perform analog-to-digital conversion on the amplified DC surge signal to obtain a surge signal.

[0049] Specifically, when a surge occurs in the signal line 210, the current in the lightning protection module 110 changes. At this time, due to the change in the current in the lightning protection module 110, an induced electromotive force is induced in the sensing unit 121, that is, an AC surge signal. The frequency selection unit 122 obtains the AC surge signal and performs frequency selection filtering on the AC surge signal to filter out the clutter in the AC surge signal. Exemplarily, the frequency selection unit 122 can be a bandpass filter. The rectifier and filter unit 123 obtains the filtered AC surge signal and converts the AC surge signal into a DC surge signal. Since the waveform fluctuation after the AC power is rectified to the DC power is large, it is also necessary to filter the DC surge signal to make the waveform of the DC surge signal smooth and stabilize the DC surge signal. The amplifier unit 124 obtains the filtered DC surge signal and amplifies it. Since the AC surge signal is an analog signal, the amplified DC surge signal obtained based on the AC surge signal processing and amplification is also an analog signal. Therefore, the amplifying unit 124 further converts the amplified DC surge signal into a digital signal, and the amplified DC surge signal converted into the digital signal is the surge signal.

[0050] Based on the above embodiments, optionally, continue to refer to Figure 2 , the sensing unit 121 includes: at least one sensing inductor L1.

[0051] The inductive inductor L1 is coupled to the lightning protection module 110; the first end of the inductive inductor L1 is connected to the first input end of the frequency selection unit 122; the second end of the inductive inductor L1 is connected to the second input end of the frequency selection unit 122; the first output end and the second output end of the frequency selection unit 122 are both connected to the rectifier and filter unit 123.

[0052] Specifically, the inductive inductor L1 generates an induced electromotive force according to the current change in the lightning protection module, that is, an AC surge signal. The magnitude of the induced electromotive force generated by the inductive inductor L1 is related to the degree of current change in the lightning protection module. The faster the current in the lightning protection module changes and the larger the amplitude, the greater the induced electromotive force generated by the inductive inductor L1.

[0053] Based on the above embodiments, optionally, continue to refer to Figure 2The frequency selection unit 122 includes: a first frequency selection capacitor C1, a first frequency selection resistor R1, a second frequency selection capacitor C2 and a second frequency selection resistor R2.

[0054] The first end of the first frequency-selective capacitor C1 is connected to the sensing unit 121; the second end of the first frequency-selective capacitor C1 is connected to the first end of the first frequency-selective resistor R1; the second end of the first frequency-selective resistor R1 is connected to the first end of the second frequency-selective capacitor C2; the second end of the second frequency-selective capacitor C2 is connected to the first end of the second frequency-selective resistor R2; the second end of the second frequency-selective resistor R2 is connected to the second end of the first frequency-selective capacitor C1; and the first end of the second frequency-selective resistor R2 is also connected to the sensing unit 121.

[0055] When the sensing unit 121 includes a plurality of sensing inductors L1 , the sensing inductors L1 may be connected in parallel to each other.

[0056] Based on the above embodiments, optionally, continue to refer to Figure 2 The rectifying and filtering unit 123 includes: a rectifying bridge REC, a filtering capacitor C3 and a filtering resistor R3.

[0057] The first AC end of the rectifier bridge REC and the second AC end of the rectifier bridge REC are both connected to the frequency selection unit 122; the DC positive end of the rectifier bridge REC is connected to the amplification unit 124; the DC negative end of the rectifier bridge REC is grounded; the filter capacitor C3 is connected between the DC positive end of the rectifier bridge REC and the DC negative end of the rectifier bridge REC; the filter resistor R3 is connected in parallel with the filter capacitor.

[0058] Specifically, the filter capacitor C3 and the filter resistor R3 form a filter circuit. The rectifier bridge REC rectifies the acquired AC surge signal, that is, converts the AC surge signal into a DC surge signal. The filter circuit formed by the filter capacitor C3 and the filter resistor R3 filters the DC surge signal output by the rectifier bridge REC to make the waveform of the DC surge signal smooth and stabilize the DC surge signal.

[0059] Based on the above embodiments, optionally, continue to refer to Figure 2 The amplifying unit 124 includes: an operational amplifier U1, a first operational amplifier resistor R4, a second operational amplifier resistor R5 and an analog-to-digital converter U2.

[0060] The non-inverting input terminal of the operational amplifier U1 is connected to the rectifier and filter unit 123; the inverting input terminal of the operational amplifier U1 is connected to the first end of the first operational amplifier resistor R4; the second end of the first operational amplifier resistor R4 is grounded; the second operational amplifier resistor R5 is connected between the output terminal of the operational amplifier U1 and the inverting input terminal of the operational amplifier U1; the output terminal of the operational amplifier U1 is connected to the input terminal IN of the analog-to-digital converter U2; the data terminal SDA and the clock terminal SCLK of the analog-to-digital converter U2 are both connected to the control module 110.

[0061] Specifically, the operational amplifier U1 amplifies the acquired DC surge signal, the analog-to-digital converter U2 acquires the amplified DC surge signal, and converts the amplified DC surge signal from an analog signal to a digital signal, that is, converts the amplified DC surge signal into a surge signal.

[0062] Figure 3 Schematic diagram of another surge protector provided by an embodiment of the present invention. Figure 3 The surge protector also includes: a temperature detection module 150.

[0063] The temperature detection module 150 is arranged close to the lightning protection module 110; the temperature detection module 150 is connected to the control module 130; the temperature detection module 150 is used to obtain the temperature of the lightning protection module 110; the control module 130 is also used to generate an alarm signal when the temperature of the lightning protection module 110 is greater than or equal to a preset temperature.

[0064] Specifically, when the lightning protection module 110 discharges the surge current, the lightning protection module 110 generates a certain amount of heat due to the thermal effect of the current. When the lightning protection module 110 is damaged, the current flowing through the lightning protection module 110 increases suddenly, the heat generated by the lightning protection module 110 increases, and the temperature of the lightning protection module 110 rises. Therefore, whether the lightning protection module 110 is damaged can be determined based on the temperature of the lightning protection module 110.

[0065] The temperature detection module 150 detects the temperature of the lightning protection module 110. The control module 130 obtains the temperature detected by the temperature detection module and generates an alarm signal when the temperature of the lightning protection module 110 is greater than or equal to a preset temperature. The preset temperature is a preset temperature of the lightning protection module 110 at the maximum discharge current. Different lightning protection modules 110 have different preset temperatures. In actual application, the preset temperature can be set according to the characteristics of the lightning protection module 110, and this embodiment does not limit this.

[0066] Figure 4 is a schematic diagram of a surge protector provided by an embodiment of the present invention. Based on the above embodiments, optionally, refer to Figure 4 The temperature detection module 150 is connected to the temperature terminal TEMP of the control module 130; the sensing unit 121, the frequency selection unit 122, the rectification and filtering unit 123 and the amplification unit 124 in the monitoring module 120 are connected in sequence, and the amplification unit 122 is also connected to the data terminal SDA1 and the clock terminal SCLK1 of the control module 130.

[0067] Based on the above embodiments, optionally, continue to refer to Figure 4, the surge protector also includes: a fault detection module 160.

[0068] The first end of the fault detection module 160 is connected to the fourth end of the lightning protection module 110; the second end of the fault detection module 160 is connected to the fifth end of the lightning protection module 110; the third end of the fault detection module 160 and the fourth end of the fault detection module 160 are both connected to the control module 130; the first end of the lightning protection module 110 and the second end of the lightning protection module 110 are both connected to the signal source 200; the third end of the lightning protection module 110 and the fifth end of the lightning protection module 110 are both connected to the receiving source 300; the fault detection module 160 is used to detect whether the lightning protection module 110 is faulty, and generate a fault signal when the lightning protection module 110 fails; the control module 130 is also used to generate an alarm signal according to the fault signal. Specifically, the fault detection module 160 detects whether the lightning protection module 110 is faulty, and generates a fault signal when the lightning protection module 110 fails. The control module 130 obtains the fault signal and generates an alarm signal according to the fault signal.

[0069] Based on the above embodiments, optionally, continue to refer to Figure 4 The lightning protection module includes: a first gas discharge tube GDT1, a second gas discharge tube GDT2, a third gas discharge tube GDT3, a first lightning protection inductor L2, a second lightning protection inductor L3 and a transient suppression diode TVS.

[0070] The first end of the first gas discharge tube GDT1 and the second end of the first gas discharge tube GDT1 are both connected to the signal source 200; the first end of the second gas discharge tube GDT2 is connected to the first end of the first gas discharge tube GDT1; the second end of the second gas discharge tube GDT2 is grounded; the first end of the third gas discharge tube GDT3 is connected to the second end of the first gas discharge tube GDT1; the second end of the third gas discharge tube GDT3 is grounded; the first end of the first lightning protection inductor L2 is connected to the first end of the first gas discharge tube GDT1; the first end of the second lightning protection inductor L3 is connected to the second end of the first gas discharge tube GDT1; the second end of the first lightning protection inductor L2 is connected to the first end of the transient suppression diode TVS; the second end of the transient suppression diode TVS is connected to the fault detection module 160; the second end of the first lightning protection inductor L2 and the second end of the second lightning protection inductor L3 are both connected to the receiving source 300.

[0071] Based on the above embodiments, optionally, continue to refer to Figure 4 , the fault detection module 160 includes: a photoelectric coupler OC.

[0072] The first end of the light-emitting part of the photocoupler OC serves as the first end of the fault detection module 160; the second end of the light-emitting part of the photocoupler OC serves as the second end of the fault detection module 160; the first end of the light-receiving part of the photocoupler OC serves as the third end of the fault detection module 160; the second end of the light-receiving part of the photocoupler OC serves as the fourth end of the fault detection module 160. Optionally, continue to refer to Figure 4 , a light emitting diode LED can also be provided in the fault detection module 160. The light emitting diode LED can be provided between the fourth end of the lightning protection module 110 and the first end of the light emitting part of the photoelectric coupler OC, or can be provided between the second end of the light emitting part of the photoelectric coupler OC and the fifth end of the lightning protection module 110. Among them, when the transient suppression diode TVS in the lightning protection module 110 fails, the light emitting part of the photoelectric coupler OC is powered on and emits light. The light receiving part of the photoelectric coupler OC is turned on, and after the light receiving part of the photoelectric coupler OC is turned on, the photoelectric coupler OC outputs a high level signal, that is, a fault signal. At this time, the connection between the A+ end and the A- end of the control module 110 is turned on, and the A+ end of the control module 110 changes from a high level to a low level. Since the light emitting diode LED is provided in the circuit of the light emitting part of the photoelectric coupler OC, when the light emitting part of the photoelectric coupler OC is powered on, the light emitting diode LED is also powered on, and the light emitting diode LED is lit to remind the user that the surge protector fails.

[0073] Optionally, based on the above embodiments, optionally, continue to refer to Figure 4 The alarm module 140 includes: an alarm unit 141 , a communication unit 142 , an analog output unit 143 and a digital output unit 144 .

[0074] Among them, the alarm unit 141, the communication unit 142, the analog output unit 143 and the digital output unit 144 are all connected to the output terminal OUT of the control module 130. The alarm unit 141 can alarm according to the alarm signal generated by the control module 130, and the alarm can be in the form of a sound alarm, a photoelectric alarm, or a combination of a sound alarm and a photoelectric alarm. The communication unit 142 can generate an alarm communication signal according to the alarm signal, and send the alarm communication signal to the server or the user terminal to remind the user that the surge protector fails, further improving the safety of the use of the surge protector. The analog output unit 143 can convert the alarm signal into an analog signal for output, so that the user can link the surge protector with the equipment in the use scenario according to actual needs. The digital output unit 144 can convert the alarm signal into a digital signal for output, so that the user can link the surge protector with the equipment in the use scenario according to actual needs. It should be noted that when the alarm signal is an analog signal, the analog output unit 143 directly outputs the alarm signal; when the alarm signal is a digital signal, the digital output unit 143 directly outputs the alarm signal.

[0075] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0076] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A surge protector, characterized in that: include: A lightning protection module, the lightning protection module is connected to the signal line; the lightning protection module is used to discharge the surge current on the signal line and limit the voltage on the signal line; A monitoring module, the monitoring module is coupled to the lightning protection module; the monitoring module is used to generate a surge signal according to the surge current on the signal line; A control module, the control module is connected to the monitoring module; the control module is used to obtain the surge voltage amplitude on the signal line according to the surge signal, accumulate the number of surges borne by the lightning protection module, and generate an alarm signal when the surge voltage amplitude is greater than or equal to a preset amplitude and / or the number of surges is greater than or equal to a preset number; An alarm module is connected to the control module; the alarm module is used to give an alarm according to the alarm signal.

2. The surge protector according to claim 1, characterized in that: The monitoring module includes a sensing unit, a frequency selection unit, a rectification and filtering unit and an amplification unit connected in sequence; The sensing unit is also coupled to the lightning protection module; the amplification unit is also connected to the control module; The sensing unit is used to generate an AC surge signal according to the surge current on the signal line; the frequency selection unit is used to perform frequency selection filtering on the AC surge signal; the rectification and filtering unit is used to convert the AC surge signal into a DC surge signal; the amplification unit is used to amplify the DC surge signal and perform analog-to-digital conversion on the amplified DC surge signal to obtain the surge signal.

3. The surge protector according to claim 2, characterized in that: The induction unit includes: at least one induction inductor; The inductive inductor is coupled to the lightning protection module; the first end of the inductive inductor is connected to the first input end of the frequency selection unit; the second end of the inductive inductor is connected to the second input end of the frequency selection unit; the first output end and the second output end of the frequency selection unit are both connected to the rectifier and filter unit.

4. The surge protector according to claim 2, characterized in that: The frequency selection unit includes: a first frequency selection capacitor, a first frequency selection resistor, a second frequency selection capacitor and a second frequency selection resistor; The first end of the first frequency-selective capacitor is connected to the induction unit; the second end of the first frequency-selective capacitor is connected to the first end of the first frequency-selective resistor; the second end of the first frequency-selective resistor is connected to the first end of the second frequency-selective capacitor; the second end of the second frequency-selective capacitor is connected to the first end of the second frequency-selective resistor; the second end of the second frequency-selective resistor is connected to the second end of the first frequency-selective capacitor; and the first end of the second frequency-selective resistor is also connected to the induction unit.

5. The surge protector according to claim 2, characterized in that: The rectification and filtering unit comprises: a rectification bridge, a filtering capacitor and a filtering resistor; The first AC end of the rectifier bridge and the second AC end of the rectifier bridge are both connected to the frequency selection unit; the DC positive end of the rectifier bridge is connected to the amplification unit; the DC negative end of the rectifier bridge is grounded; the filter capacitor is connected between the DC positive end of the rectifier bridge and the DC negative end of the rectifier bridge; the filter resistor is connected in parallel with the filter capacitor.

6. The surge protector according to claim 2, characterized in that: The amplification unit includes: an operational amplifier, a first operational amplifier resistor, a second operational amplifier resistor and an analog-to-digital converter; The non-inverting input terminal of the operational amplifier is connected to the rectifier and filter unit; the inverting input terminal of the operational amplifier is connected to the first terminal of the first operational amplifier resistor; the second terminal of the first operational amplifier resistor is grounded; the second operational amplifier resistor is connected between the output terminal of the operational amplifier and the inverting input terminal of the operational amplifier; the output terminal of the operational amplifier is connected to the input terminal of the analog-to-digital converter; the data terminal and the clock terminal of the analog-to-digital converter are both connected to the control module.

7. The surge protector according to claim 1, characterized in that: Also includes: Fault detection module; The first end of the fault detection module is connected to the fourth end of the lightning protection module; The second end of the fault detection module is connected to the fifth end of the lightning protection module; the third end of the fault detection module and the fourth end of the fault detection module are both connected to the control module; the first end of the lightning protection module and the second end of the lightning protection module are both connected to the signal source; the third end of the lightning protection module and the fifth end of the lightning protection module are both connected to the receiving source; The fault detection module is used to detect whether the lightning protection module is faulty and generate a fault signal when the lightning protection module is faulty; the control module is also used to generate the alarm signal according to the fault signal.

8. The surge protector according to claim 7, characterized in that: The fault detection module includes: a photoelectric coupler; The first end of the light-emitting part of the photoelectric coupler serves as the first end of the fault detection module; the second end of the light-emitting part of the photoelectric coupler serves as the second end of the fault detection module; the first end of the light-receiving part of the photoelectric coupler serves as the third end of the fault detection module; and the second end of the light-receiving part of the photoelectric coupler serves as the fourth end of the fault detection module.

9. The surge protector according to claim 7, characterized in that: The lightning protection module comprises: a first gas discharge tube, a second gas discharge tube, a third gas discharge tube, a first lightning protection inductor, a second lightning protection inductor and a transient suppression diode; The first end of the first gas discharge tube and the second end of the first gas discharge tube are both connected to the signal source; the first end of the second gas discharge tube is connected to the first end of the first gas discharge tube; the second end of the second gas discharge tube is grounded; the first end of the third gas discharge tube is connected to the second end of the first gas discharge tube; the second end of the third gas discharge tube is grounded; the first end of the first lightning protection inductor is connected to the first end of the first gas discharge tube; the first end of the second lightning protection inductor is connected to the second end of the first gas discharge tube; the second end of the first lightning protection inductor is connected to the first end of the transient suppression diode; the second end of the transient suppression diode is connected to the fault detection module; the second end of the first lightning protection inductor and the second end of the second lightning protection inductor are both connected to the receiving source.

10. The surge protector according to claim 1, characterized in that: Also includes: Temperature detection module; The temperature detection module is arranged close to the lightning protection module; the temperature detection module is connected to the control module; The temperature detection module is used to obtain the temperature of the lightning protection module; the control module is also used to generate the alarm signal when the temperature of the lightning protection module is greater than or equal to a preset temperature.

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