CN111487557A - DS L circuit lightning stroke detection statistical circuit - Google Patents
DS L circuit lightning stroke detection statistical circuit Download PDFInfo
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- CN111487557A CN111487557A CN202010226979.XA CN202010226979A CN111487557A CN 111487557 A CN111487557 A CN 111487557A CN 202010226979 A CN202010226979 A CN 202010226979A CN 111487557 A CN111487557 A CN 111487557A
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Abstract
The invention discloses a DS L line lightning strike detection statistical circuit which is suitable for xDS L equipment, wherein xDS L0 equipment at least comprises a DS L1 interface, a DS L2 transformer, a DS L3 module and a control module, the circuit comprises a lightning strike protection module, a state machine module and a lightning strike indication module, the DS L4 interface is used for being connected with a DS L local side through a DS L line, the state machine module is used for generating a corresponding first control signal and sending the first control signal to the lightning strike indication module when the DS L line is detected to be struck by lightning and sending the first control signal to the lightning strike indication module, so that the lightning strike indication module sends a corresponding lightning strike indication according to the received first control signal, the control module is used for sending a lightning strike signal to the DS L local side through a DS L module when the DS L line is detected to be struck by lightning and the xDS L equipment is not damaged, and the DS L local side carries out lightning strike number statistics according to the received lightning strike signal.
Description
Technical Field
The invention relates to the technical field of lightning protection, in particular to a DS L line lightning stroke detection statistical circuit.
Background
The DS L interface of the current xDS L router needs to be connected to the DS L office end of an ISP through a telephone line, and the telephone line is generally wired outdoors and is easily struck by lightning, so that the xDS L router is damaged, therefore, a lightning stroke protection device is required to be additionally added at the DS L interface of the xDS L router on the market at present, and the DS L interface is generally designed to be in 6kV lightning protection grade.
The general lightning protection device and its lightning protection principle are explained as follows:
a gas discharge tube, which is generally hermetically sealed and packaged by ceramic, and is internally formed by filling two or more metal electrodes with gaps with inert gas (argon or neon); when the voltage applied to the two electrode ends reaches the voltage which makes the gas in the gas discharge tube breakdown, the gas discharge tube starts to discharge and is changed from high resistance to low resistance, so that the voltage at the two electrode ends does not exceed the breakdown voltage, thereby achieving the purposes of consuming the lightning energy and protecting the subsequent equipment;
when the TVS tube is impacted by reverse transient high energy, the transient voltage suppressor can change the impedance between two stages into low impedance at a very high speed (subnanosecond level), thereby having good surge power absorption capability, simultaneously keeping the voltage between two stages at a preset value, and effectively protecting other components in the circuit from being damaged by surge pulse.
However, the weather conditions of various national regions are different (for example, mountainous regions have more high altitude and fewer mines in plain low altitude), the wiring modes are also different (some wires are routed in the air in a mode similar to telegraph poles, some wires are routed through underground pipelines), so the probability difference of lightning strikes on telephone lines is very large, and the existing lightning strike protection device can only play a role in protecting circuits when lightning strikes occur, and can not collect and count different lightning strike conditions.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a DS L line lightning stroke detection statistical circuit, which has a lightning stroke detection statistical function, can detect and count lightning stroke conditions on different lines, and provides reference for subsequent line erection and line maintenance.
In order to solve the technical problem, the embodiment of the invention provides a DS L line lightning stroke detection statistical circuit which is suitable for xDS L equipment, wherein the xDS L equipment at least comprises a DS L interface, a DS L transformer, a DS L module and a control module, and the circuit comprises a lightning stroke protection module, a state machine module and a lightning stroke indication module;
the first output end of the DS L interface is connected with the first input end of the DS L transformer, the second output end of the DS L interface is connected with the second input end of the DS L transformer, and the DS L transformer is connected with the control module through the DS L module;
the lightning stroke protection module comprises a lightning stroke protection module, a state machine module, a control module, a lightning stroke indication module, a state machine module and a power supply module, wherein the first end of the lightning stroke protection module is connected with the first output end of the DS L interface, the second end of the lightning stroke protection module is connected with the second output end of the DS L interface, the third end of the lightning stroke protection module is connected with the detection end of the state machine module, and the fourth end of the lightning stroke protection module is grounded;
the DS L interface is used for being connected with a DS L local side through a DS L line, the state machine module is used for generating a corresponding first control signal and sending the first control signal to the lightning stroke indicating module when the DS L line is detected to be struck by lightning, so that the lightning stroke indicating module sends a corresponding lightning stroke indication according to the received first control signal, and the control module is used for sending a lightning stroke signal to the DS L local side through the DS L module when the DS L line is detected to be struck by lightning and the xDS L equipment is not damaged, so that the DS L local side carries out lightning stroke frequency statistics according to the received lightning stroke signal.
Further, the control module is further configured to send a reset signal to a reset terminal of the state machine module through a second terminal of the control module when a lightning strike on a DS L line is detected and the xDS L device is not damaged;
the state machine module is used for resetting according to the received reset signal, generating a corresponding second control signal and sending the second control signal to the lightning stroke indication module, so that the lightning stroke indication module closes a corresponding lightning stroke indication according to the received second control signal.
Furthermore, the lightning protection module comprises a gas discharge tube, a first TVS tube, a second TVS tube, a third TVS tube, a magnetic ring coil, a rectifier bridge and a first resistor; wherein,
the first end of the gas discharge tube is connected with the first end of the lightning stroke protection module, and the second end of the gas discharge tube is connected with the second end of the lightning stroke protection module;
the magnetic ring coil is sleeved on a first end pin of the gas discharge tube, the first end of the magnetic ring coil is connected with the first end of the rectifier bridge, and the second end of the magnetic ring coil is connected with the second end of the rectifier bridge;
the third end of the rectifier bridge is connected with the first end of the first resistor, and the fourth end of the rectifier bridge is connected with the second end of the first resistor; the first end of the first resistor is also connected with the third end of the lightning stroke protection module, and the second end of the first resistor is grounded;
the first end of the first TVS tube is connected with the first end of the lightning stroke protection module, and the second end of the first TVS tube is grounded; the first end of the second TVS tube is connected with the second end of the lightning stroke protection module, and the second end of the second TVS tube is grounded; the first end of the third TVS tube is connected with the third end of the lightning stroke protection module, and the second end of the third TVS tube is grounded.
Further, the state machine module comprises a logic AND gate, a logic NOT gate and a trigger; wherein,
the first input end of the logic AND gate is connected with the detection end of the state machine module, the second input end of the logic AND gate is connected with the output end of the logic NOT gate, and the output end of the logic AND gate is connected with the first input end of the trigger;
the input end of the logic not gate is connected with the reset end of the state machine module, and the input end of the logic not gate is also connected with the second input end of the trigger;
and the output end of the trigger is connected with the output end of the state machine module.
Further, the lightning strike indication module comprises a switch unit, a battery and a light emitting diode; wherein,
the control end of the switch unit is connected with the input end of the lightning stroke indicating module, the first end of the switch unit is connected with the negative electrode of the battery, and the second end of the switch unit is connected with the cathode of the light-emitting diode;
the anode of the battery is connected with the anode of the light-emitting diode.
Further, the switch unit comprises a second resistor, a switch tube, a diode and a relay; wherein,
the first end of the second resistor is connected with the control end of the switch unit, and the second end of the second resistor is connected with the control end of the switch tube;
the first end of the switch tube is connected with the anode of the diode, and the second end of the switch tube is grounded;
the cathode of the diode is connected with a power supply, and the cathode of the diode is also connected with the first end of the relay;
the second end of the relay is connected with the first end of the switch tube, the third end of the relay is connected with the first end of the switch unit, and the fourth end of the relay is connected with the second end of the switch unit.
Compared with the prior art, the embodiment of the invention provides a DS L line lightning stroke detection statistical circuit which is suitable for xDS L equipment, the xDS L0 equipment at least comprises a DS L1 interface, a DS L2 transformer, a DS L3 module and a control module, the circuit comprises a lightning stroke protection module, a state machine module and a lightning stroke indication module, wherein the DS L4 interface is used for being connected with a DS L local terminal through a DS L line, the state machine module is used for generating a corresponding first control signal when detecting that a DS L line is struck by lightning and sending the first control signal to the lightning stroke indication module, so that the lightning stroke indication module sends a corresponding lightning stroke indication according to the received first control signal, the control module is used for sending a lightning stroke signal to a DS L local terminal through the DS L module when detecting that the DS L line is struck by lightning and the xDS L equipment is not damaged, so that the DS L local terminal carries out times statistics according to the received lightning stroke signal, and the embodiment of the invention has a detection statistical function, can detect and count lightning stroke conditions on different lines and provide reference for subsequent circuit erection and maintenance.
Drawings
FIG. 1 is a schematic structural diagram of a DS L line lightning strike detection statistical circuit according to a preferred embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a preferred embodiment of a DS L line lightning strike detection statistical circuit provided by the present invention;
FIG. 3 is a circuit diagram of a preferred embodiment of a state machine module of a DS L line lightning strike detection statistic circuit provided by the present invention;
FIG. 4 is a circuit diagram of a lightning strike indication module of a DS L line lightning strike detection statistical circuit according to a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
The embodiment of the invention provides a DS L line lightning stroke detection statistical circuit, which is shown in figure 1 and is a structural schematic diagram of a preferred embodiment of the DS L line lightning stroke detection statistical circuit provided by the invention, wherein the circuit is suitable for xDS L equipment, the xDS L equipment at least comprises a DS L interface, a DS L transformer, a DS L module and a control module, and the circuit comprises a lightning stroke protection module, a state machine module and a lightning stroke indication module;
the first output end of the DS L interface is connected with the first input end of the DS L transformer, the second output end of the DS L interface is connected with the second input end of the DS L transformer, and the DS L transformer is connected with the control module through the DS L module;
the lightning stroke protection module comprises a lightning stroke protection module, a state machine module, a control module, a lightning stroke indication module, a state machine module and a power supply module, wherein the first end of the lightning stroke protection module is connected with the first output end of the DS L interface, the second end of the lightning stroke protection module is connected with the second output end of the DS L interface, the third end of the lightning stroke protection module is connected with the detection end of the state machine module, and the fourth end of the lightning stroke protection module is grounded;
the DS L interface is used for being connected with a DS L local side through a DS L line, the state machine module is used for generating a corresponding first control signal and sending the first control signal to the lightning stroke indicating module when the DS L line is detected to be struck by lightning, so that the lightning stroke indicating module sends a corresponding lightning stroke indication according to the received first control signal, and the control module is used for sending a lightning stroke signal to the DS L local side through the DS L module when the DS L line is detected to be struck by lightning and the xDS L equipment is not damaged, so that the DS L local side carries out lightning stroke frequency statistics according to the received lightning stroke signal.
Specifically, the circuit comprises a lightning stroke protection module, a state machine module and a lightning stroke indication module.
The system comprises a DS L interface of xDS L equipment (such as an xDS L router) and a DS 368525 interface of 3684 equipment, wherein the DS 850 interface is connected with a DS L2 local terminal of an ISP (Internet service provider) through a DS L line, the DS L transformer, the DS L module and a control module of xDS L equipment are used in the prior art, the lightning stroke protection module of the circuit can protect xDS L equipment and prevent xDS L equipment from being damaged when lightning stroke occurs on the DS L line, a state machine module of the circuit can generate a corresponding first control signal and send the first control signal to a lightning stroke indication module of the circuit when detecting the DS L line by a detection end, so that the lightning stroke indication module sends out a corresponding lightning stroke indication (for example, indication is carried out in a mode of sound or an indicator light and the like) according to the received first control signal, the control module of the xDS L equipment detects the DS L line by the detection end and judges that the DS xDS L equipment is not damaged (namely, when the DS L module and the control module are not damaged, the DS 850 interface sends out lightning stroke signals to the DS 3573742 terminal, and counts the number of lightning stroke signals received by the DS L, and statistics are carried out according to the DS L, the number of lightning stroke signals received once.
It can be understood that, when the control module of the xDS L device detects a lightning strike on a DS L line through a detection end and determines that a DS L module is damaged, and the control module is not damaged, at this time, the xDS L device cannot communicate with a DS L central office end, a user cannot surf the Internet and then can actively notify an ISP (Internet Service Provider) to check the damage, an ISP worker can determine whether the damage is caused by the lightning strike by checking whether a lightning strike indication module sends a corresponding lightning strike indication, if so, the ISP worker manually registers the lightning strike once, the control module of the xDS L device detects the lightning strike on a DS L line through the detection end and determines that the DS L module and the control module are both damaged, the xDS L device cannot communicate with the DS L central office end, and similarly, the lightning strike and the number of times of the lightning strike registration need to be determined by the ISP worker.
It should be noted that, a control module (for example, a CPU module) has a monitoring function for each module in the xDS L device, and may perform self-check occasionally, and if a certain module has an abnormality, a problem may be found during the self-check, so that the CPU module may determine whether a module in the xDS L device is damaged according to a self-check result.
The DS L line lightning stroke detection and statistics circuit is suitable for xDS L equipment, the xDS L0 equipment at least comprises a DS L1 interface, a DS L2 transformer, a DS L3 module and a control module, the circuit comprises a lightning stroke protection module, a state machine module and a lightning stroke indication module, wherein the DS L4 interface is used for being connected with a DS L local side through a DS L line, the state machine module is used for generating a corresponding first control signal when detecting that a DS L line is struck by lightning and sending the first control signal to the lightning stroke indication module, so that the lightning stroke indication module sends a corresponding lightning stroke indication according to the received first control signal, the control module is used for sending a lightning stroke signal to a DS L local side through the DS L module when detecting that the DS L line is struck by lightning and the xDS L equipment is not damaged, and the DS L local side carries out times of lightning stroke statistics according to the received lightning stroke signal.
As an improvement of the above solution, the control module is further configured to send a reset signal to a reset terminal of the state machine module through a second terminal of the control module when a lightning strike on a DS L line is detected and the xDS L device is not damaged;
the state machine module is used for resetting according to the received reset signal, generating a corresponding second control signal and sending the second control signal to the lightning stroke indication module, so that the lightning stroke indication module closes a corresponding lightning stroke indication according to the received second control signal.
Specifically, with reference to the foregoing embodiment, when the control module of the xDS L device detects a lightning strike on the DS L line through the detection end and determines that the xDS L device is not damaged (that is, neither the DS L module nor the control module is damaged), the control module may generate a corresponding reset signal in addition to notifying the DS L office end of performing statistics on the number of lightning strikes, and send the generated reset signal to the reset end of the state machine module, and the state machine module resets according to the received reset signal, generates a corresponding second control signal, and sends the corresponding second control signal to the lightning strike indication module, so that the lightning strike indication module closes a corresponding lightning strike indication according to the received second control signal.
It is understood that the lightning stroke indication module is in the lightning stroke indication on state until the state machine module does not receive the reset signal, so that when the xDS L equipment is damaged, whether the equipment is damaged by the lightning stroke can be judged according to the state of the lightning stroke indication module, and a reference is provided for maintenance of the xDS L equipment.
It should be noted that, when the control module of the xDS L device detects a lightning strike on the DS L line through the detection end and determines that the DS L module is damaged and the control module is not damaged, or when the control module of the xDS L device detects a lightning strike on the DS L line through the detection end and determines that both the DS L module and the control module are damaged, the control module does not reset the state machine module, and at this time, the lightning strike indication module is always in a lightning strike indication on state.
Referring to fig. 2, which is a schematic circuit diagram of a preferred embodiment of a DS L line lightning strike detection statistical circuit provided by the present invention, in another preferred embodiment, the lightning strike protection module includes a gas discharge tube RV1, a first TVS1, a second TVS2, a third TVS3, a magnetic loop coil CO1, a rectifier bridge D1 and a first resistor R1, wherein,
a first end of the gas discharge tube RV1 is connected with a first end of the lightning stroke protection module, and a second end of the gas discharge tube RV1 is connected with a second end of the lightning stroke protection module;
the magnetic ring coil CO1 is sleeved on a first end pin of the gas discharge tube RV1, a first end of the magnetic ring coil CO1 is connected with a first end of the rectifier bridge D1, and a second end of the magnetic ring coil CO1 is connected with a second end of the rectifier bridge D1;
the third end of the rectifier bridge D1 is connected with the first end of the first resistor R1, and the fourth end of the rectifier bridge D1 is connected with the second end of the first resistor R1; the first end of the first resistor R1 is also connected with the third end of the lightning stroke protection module, and the second end of the first resistor R1 is grounded;
a first end of the first TVS transistor TVS1 is connected to a first end of the lightning strike protection module, and a second end of the first TVS transistor TVS1 is grounded; a first end of the second TVS transistor TVS2 is connected to a second end of the lightning strike protection module, and a second end of the second TVS transistor TVS2 is grounded; the first end of the third TVS tube TVS3 is connected to the third end of the lightning strike protection module, and the second end of the third TVS tube TVS3 is grounded.
Specifically, in combination with the above embodiments, when a lightning strike occurs, the air inside the gas discharge tube RV1 is broken down, a large current flows through the pin of the gas discharge tube RV1, an induced current is also generated on the coil of the magnetic ring CO1 (the magnetic ring of the CO1 is sleeved on the pin of the RV1, and the coil is wound on the magnetic ring) due to the electromagnetic induction effect, the induced current continues to flow through the first resistor R1 after passing through the rectifier bridge D1, and returns to the magnetic loop coil CO1, when the detection end of the state machine module generates high level and the state machine module detects that the detection end has high level (low level when no lightning strike exists), the OUTPUT end OUTPUT can OUTPUT high level to the lightning stroke indicating module, thereby controlling the lightning stroke indicating module to send out corresponding lightning stroke indication, meanwhile, the control module (such as a CPU module) also detects that the detection end of the state machine module has high level through the GPIO port, and indicates that lightning stroke occurs.
It should be noted that, the first TVS transistor TVS1, the second TVS transistor TVS2 and the third TVS transistor TVS3 are lightning protection devices, wherein the third TVS transistor TVS3 can be turned on when the voltage is very large, so that the voltage at the detection end is stabilized at 3.3V (different TVS transistors correspond to different regulated voltages), and the specific working principle of the TVS transistor is not repeated.
Referring to fig. 3, which is a circuit diagram of a preferred embodiment of a state machine module of a DS L line lightning strike detection statistic circuit provided by the present invention, in a further preferred embodiment, the state machine module comprises a logic and gate G1, a logic not gate G2 and a flip-flop U1, wherein,
a first input end of the logic and gate G1 is connected to the detection end of the state machine module, a second input end of the logic and gate G1 is connected to the output end of the logic not gate G2, and an output end of the logic and gate G1 is connected to a first input end of the flip-flop U1;
the input end of the not gate G2 is connected with the reset end of the state machine module, and the input end of the not gate G2 is also connected with the second input end of the flip-flop U1;
the output end of the trigger U1 is connected with the output end of the state machine module.
Specifically, in combination with the above-mentioned embodiment, the detection terminal of the state machine module is connected to one input terminal of the logic and gate G1, the reset terminal of the state machine module is connected to the other input terminal of the logic and gate G1 through the logic not gate G2, the flip-flop in fig. 3 is exemplified by a JK flip-flop, the OUTPUT terminal of the logic and gate G1 is connected to the J input terminal of the JK flip-flop, the reset terminal of the state machine module is connected to the K input terminal of the JK flip-flop, the OUTPUT terminal OUTPUT of the state machine module is connected to the positive OUTPUT terminal Q of the JK flip-flop, as can be known from the operation principle of the logic and gate G1, the logic not gate G2 and the JK flip-flop U1, when the detection terminal is at a high level and the reset terminal is at a low level, the OUTPUT terminal OUTPUTs a high level, the first control signal is valid, the corresponding lightning strike indicating module sends a corresponding lightning strike indicating according to, and when the reset end is at a high level, the state machine module resets, the OUTPUT end OUTPUT OUTPUTs a low level, the second control signal is effective, and the corresponding lightning stroke indication module is correspondingly controlled to close the corresponding lightning stroke indication according to the received second control signal.
It should be noted that, in the embodiment of the present invention, only a circuit composed of a logic and gate, a logic not gate, and a JK flip-flop is taken as an example to describe the operating principle of the state machine module, and other components capable of implementing the same function are also within the protection scope of the embodiment of the present invention, and the embodiment of the present invention is not limited specifically.
In yet another preferred embodiment, shown in connection with FIG. 2, the lightning strike indication module includes a switch unit, a battery B1 and a light emitting diode D2; wherein,
the control end of the switch unit is connected with the input end of the lightning stroke indication module, the first end of the switch unit is connected with the negative electrode of the battery B1, and the second end of the switch unit is connected with the cathode of the light-emitting diode D2;
the anode of the battery B1 is connected with the anode of the light emitting diode D2.
Specifically, with reference to the above embodiment, when the OUTPUT terminal OUTPUT of the state machine module OUTPUTs a high level (lightning strike occurs), the first control signal is asserted, the corresponding control switch unit is turned on, so that the circuit between the battery B1 and the led D2 is connected, and the led D2 is turned on to emit light of a corresponding color; when the OUTPUT terminal OUTPUT of the state machine module OUTPUTs a low level, the second control signal is asserted, and the corresponding control switch unit is turned off, so that the circuit between the battery B1 and the led D2 is turned off, and the led D2 is turned off and does not emit light.
Referring to fig. 4, which is a circuit diagram of a lightning stroke indication module of a DS L line lightning stroke detection statistical circuit according to a preferred embodiment of the present invention, as an improvement of the above solution, the switch unit includes a second resistor R2, a switch tube Q1, a diode D3 and a relay SW1, wherein,
a first end of the second resistor R2 is connected to the control end of the switch unit, and a second end of the second resistor R2 is connected to the control end of the switch tube Q1;
a first end of the switching tube Q1 is connected with the anode of the diode D3, and a second end of the switching tube Q1 is grounded;
the cathode of the diode D3 is connected with a power supply VCC, and the cathode of the diode D3 is also connected with a first end of the relay SW 1;
a second terminal of the relay SW1 is connected to the first terminal of the switching tube Q1, a third terminal of the relay SW1 is connected to the first terminal of the switching unit, and a fourth terminal of the relay SW1 is connected to the second terminal of the switching unit.
Specifically, with reference to the above embodiment, when the OUTPUT terminal OUTPUT of the state machine module OUTPUTs a high level, the switching tube Q1 (the switching tube Q1 in fig. 4 is exemplified by a PNP type triode) is turned off, no current flows through pins 1 and 2 of the relay SW1, pins 3 and 4 of the relay SW1 are connected, at this time, the circuit between the battery B1 and the light emitting diode D2 is connected, the light emitting diode D2 is connected, and L ED emits light, when the OUTPUT terminal OUTPUT of the state machine module OUTPUTs a low level, the switching tube Q1 is connected, a current flows through pins 1 and 2 of the relay SW1, the magnet of the relay SW1 pulls down the switch, pins 3 and 4 of the relay SW1 are disconnected, at this time, the circuit between the battery B1 and the light emitting diode D2 is disconnected, the light emitting diode D2 is not connected, and L ED does not emit light.
It should be noted that the switching tube Q1 only functions as a switch, and when the OUTPUT terminal OUTPUT is at a high level, the Q1 is not turned on, and when the OUTPUT terminal OUTPUT is at a low level, the Q1 is turned on, so that the light-on tube Q1 may be replaced by another NPN type triode or a MOS tube with similar function; SW1 is a relay, pin4 is connected to pin3 in a default state, when current flows through pin1 and pin2, pin4 is disconnected from pin3 and connected to pin5, and other electronic switches with similar functions can replace SW1, which is not limited in the embodiment of the present invention.
To sum up, the DS L line lightning strike detection statistical circuit provided by the embodiment of the invention is suitable for xDS L equipment, the xDS L0 equipment at least comprises a DS L1 interface, a DS L2 transformer, a DS L3 module and a control module, the circuit comprises a lightning strike protection module, a state machine module and a lightning strike indication module, wherein the DS L4 interface is used for being connected with a DS L local side through a DS L line, the state machine module is used for generating a corresponding first control signal and sending the first control signal to the lightning strike indication module when detecting that a DS L line is struck by lightning, so that the lightning strike indication module sends a corresponding lightning strike indication according to the received first control signal, the control module is used for sending a lightning strike signal to a DS L local side through the DS L module when detecting that the DS L line is struck by lightning and the xDS L equipment is not damaged, so that the DS L local side carries out lightning strike statistics according to the received first control signal, and the embodiment of the invention has a detection statistical function, can detect and count and provide lightning strike conditions on different lines for follow-up and maintenance lines, and provide reference lines
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A DS L line lightning stroke detection statistical circuit is characterized in that the circuit is suitable for xDS L equipment, the xDS L equipment at least comprises a DS L interface, a DS L transformer, a DS L module and a control module, and the circuit comprises a lightning stroke protection module, a state machine module and a lightning stroke indication module;
the first output end of the DS L interface is connected with the first input end of the DS L transformer, the second output end of the DS L interface is connected with the second input end of the DS L transformer, and the DS L transformer is connected with the control module through the DS L module;
the lightning stroke protection module comprises a lightning stroke protection module, a state machine module, a control module, a lightning stroke indication module, a state machine module and a power supply module, wherein the first end of the lightning stroke protection module is connected with the first output end of the DS L interface, the second end of the lightning stroke protection module is connected with the second output end of the DS L interface, the third end of the lightning stroke protection module is connected with the detection end of the state machine module, and the fourth end of the lightning stroke protection module is grounded;
the DS L interface is used for being connected with a DS L local side through a DS L line, the state machine module is used for generating a corresponding first control signal and sending the first control signal to the lightning stroke indicating module when the DS L line is detected to be struck by lightning, so that the lightning stroke indicating module sends a corresponding lightning stroke indication according to the received first control signal, and the control module is used for sending a lightning stroke signal to the DS L local side through the DS L module when the DS L line is detected to be struck by lightning and the xDS L equipment is not damaged, so that the DS L local side carries out lightning stroke frequency statistics according to the received lightning stroke signal.
2. The DS L line lightning strike detection statistic circuit of claim 1, wherein the control module is further configured to send a reset signal to the reset terminal of the state machine module through the second terminal of the control module when a lightning strike on a DS L line is detected and the xDS L device is not damaged;
the state machine module is used for resetting according to the received reset signal, generating a corresponding second control signal and sending the second control signal to the lightning stroke indication module, so that the lightning stroke indication module closes a corresponding lightning stroke indication according to the received second control signal.
3. The DS L line lightning strike detection statistic circuit of claim 1, wherein the lightning strike protection module includes a gas discharge tube, a first TVS tube, a second TVS tube, a third TVS tube, a magnetic loop coil, a rectifier bridge and a first resistor,
the first end of the gas discharge tube is connected with the first end of the lightning stroke protection module, and the second end of the gas discharge tube is connected with the second end of the lightning stroke protection module;
the magnetic ring coil is sleeved on a first end pin of the gas discharge tube, the first end of the magnetic ring coil is connected with the first end of the rectifier bridge, and the second end of the magnetic ring coil is connected with the second end of the rectifier bridge;
the third end of the rectifier bridge is connected with the first end of the first resistor, and the fourth end of the rectifier bridge is connected with the second end of the first resistor; the first end of the first resistor is also connected with the third end of the lightning stroke protection module, and the second end of the first resistor is grounded;
the first end of the first TVS tube is connected with the first end of the lightning stroke protection module, and the second end of the first TVS tube is grounded; the first end of the second TVS tube is connected with the second end of the lightning stroke protection module, and the second end of the second TVS tube is grounded; the first end of the third TVS tube is connected with the third end of the lightning stroke protection module, and the second end of the third TVS tube is grounded.
4. The DS L line lightning strike detection statistic circuit of claim 1, wherein the state machine module includes a logical AND gate, a logical NOT gate and a flip-flop,
the first input end of the logic AND gate is connected with the detection end of the state machine module, the second input end of the logic AND gate is connected with the output end of the logic NOT gate, and the output end of the logic AND gate is connected with the first input end of the trigger;
the input end of the logic not gate is connected with the reset end of the state machine module, and the input end of the logic not gate is also connected with the second input end of the trigger;
and the output end of the trigger is connected with the output end of the state machine module.
5. The DS L line lightning strike detection statistic circuit of claim 1, wherein the lightning strike indication module includes a switch unit, a battery and a light emitting diode,
the control end of the switch unit is connected with the input end of the lightning stroke indicating module, the first end of the switch unit is connected with the negative electrode of the battery, and the second end of the switch unit is connected with the cathode of the light-emitting diode;
the anode of the battery is connected with the anode of the light-emitting diode.
6. The DS L line lightning strike detection statistic circuit of claim 5, wherein the switch unit includes a second resistor, a switch tube, a diode and a relay,
the first end of the second resistor is connected with the control end of the switch unit, and the second end of the second resistor is connected with the control end of the switch tube;
the first end of the switch tube is connected with the anode of the diode, and the second end of the switch tube is grounded;
the cathode of the diode is connected with a power supply, and the cathode of the diode is also connected with the first end of the relay;
the second end of the relay is connected with the first end of the switch tube, the third end of the relay is connected with the first end of the switch unit, and the fourth end of the relay is connected with the second end of the switch unit.
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