A backplane surge protection system and method of protection

Abstract

The application discloses a bottom plate type surge protection system, which comprises a surge function module and a bottom plate module. The surge function module comprises an access unit, a protection unit, an alarm unit, a grounding unit and an output unit, the input end of the protection unit is electrically connected with the output end of the access unit, the output end of the protection unit is electrically connected with the output unit, the alarm unit is electrically connected with the protection unit, and the grounding unit is electrically connected with the protection unit. The bottom plate module comprises a signal conversion unit, the signal conversion unit comprises a first conversion unit and a second conversion unit, the input end of the first conversion unit is electrically connected with the output end of the output unit through a connector, and the input end of the second conversion unit is electrically connected with the alarm output end of the alarm unit through a connector. The system has a large number of measuring points, can meet the point position requirement, and overcomes the problem of complex wiring.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of surge protection, and particularly relates to a bottom plate type surge protection system and a protection method. BACKGROUND

[0002] A surge protector, also called a lightning protector or a surge protector, is an electronic device that provides safety protection for various electronic devices, instruments, communication lines, etc. When a peak current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in a very short time, thereby avoiding damage to other devices in the circuit. In actual use, the failure of the surge protector is usually open-circuit failure and short-circuit failure. Open-circuit failure has little effect on the system, so it is difficult to be found, and the protected device is still working, but the device is no longer protected. Short-circuit failure has a very serious impact on the system. First, the signal passing through the surge protector will be distorted, causing the system to lose control. Furthermore, if there is no suitable device to timely disconnect the failed surge protector from the system when the short-circuit current flows through the failed surge protector, the excessive release of energy when the short-circuit current is conducted may cause a serious fire. Lightning disaster is one of the most serious natural disasters, and the number of casualties and property losses caused by lightning disaster around the world every year is incalculable. Lightning is characterized by a very fast voltage rise (within 10 microseconds), a high peak voltage (tens to hundreds of millions of volts), a large current (tens to hundreds of kiloamps), a short duration (tens to hundreds of microseconds), a fast transmission speed (propagating at the speed of light), and a very large energy. It is the most destructive type of surge voltage. With the extensive application of electronic and microelectronic integrated devices, the damage to systems and devices caused by lightning overvoltage and lightning electromagnetic pulses is increasing. Therefore, lightning disaster protection for electronic information systems is very important. Installing surge protectors to suppress surges and transient overvoltages on the line and to discharge overcurrent on the line has become one of the important links in modern lightning protection technology.

[0003] For large-scale electronic information control systems, there are usually a large number of measurement points, and many surge protectors are needed to protect them. In this way, on the one hand, it is inevitable to bring about the problem of complex wiring, which requires a lot of time and effort, and is prone to errors.

[0004] Therefore, it is necessary to design a surge protection system with a large number of measurement points to overcome the problem of complex wiring. SUMMARY

[0005] To solve the above problems, the purpose of the present application is to provide a bottom plate type surge protection system, which has a large number of measurement points to meet the needs of many point positions and overcome the problem of complex wiring.

[0006] In order to achieve the above object, the technical scheme of the present application is as follows: a bottom plate type surge protection system, comprising: a surge function module, the surge function module comprises an access unit electrically connected with a device to be protected, a protection unit, an alarm unit, a grounding unit and an output unit, the input end of the protection unit is electrically connected with the output end of the access unit, the output end of the protection unit is electrically connected with the output unit, the alarm unit is electrically connected with the protection unit, and the grounding unit is electrically connected with the protection unit; a bottom plate module, the bottom plate module comprises a signal conversion unit, the signal conversion unit comprises a first conversion unit and a second conversion unit, the input end of the first conversion unit is electrically connected with the output end of the output unit through a connector, and the input end of the second conversion unit is electrically connected with the alarm output end of the alarm unit through a connector.

[0007] In an embodiment of the present application, the protection unit comprises a temperature fuse and a lightning protection tube in series, the temperature fuse is electrically connected with the output end of the access unit through a first diode, and the temperature fuse and the lightning protection tube are installed in a spatial structure close to each other, so that the heat generated by the lightning protection tube when triggering surge protection can make the temperature fuse fuse.

[0008] In an embodiment of the present application, the alarm unit is connected in parallel with the temperature fuse, the alarm unit comprises a photoelectric coupler and a light emitting diode in series, the alarm signal output end of the photoelectric coupler is electrically connected with the input end of the second conversion unit, and the second conversion unit sends the alarm signal of the photoelectric coupler to a control system after conversion.

[0009] In an embodiment of the present application, the second conversion unit comprises an MCU processor and a power supply circuit thereof, the alarm signal output end of the photoelectric coupler is electrically connected with a signal input pin of the MCU processor, and the MCU processor sends the alarm signal of the photoelectric coupler to a control system after processing.

[0010] In an embodiment of the present application, the MCU processor is of FM33LC045N type.

[0011] In an embodiment of the present application, the second conversion unit further comprises a communication circuit electrically connected with a signal output pin of the MCU processor, and the communication circuit is used for converting the output signal of the MCU processor into a preset signal and sending the preset signal to a control system.

[0012] In an embodiment of the present application, the communication circuit is an RS485 communication circuit, comprising an SN75HVD12DR chip and a power supply circuit and a signal processing circuit thereof electrically connected with a signal output pin of the MCU processor.

[0013] In one embodiment of the present application, the protection system comprises a plurality of surge function modules and a backplane module connected with the plurality of surge function modules, the grounding units of the plurality of surge function modules are connected in parallel with a system grounding terminal, and the alarm signal output ends of the plurality of alarm units are electrically connected with different input ports of the second conversion unit having the same function.

[0014] Based on the same concept, the present application further provides a backplane type surge protection method applied to the backplane type surge protection system described in any one of the above embodiments, comprising the following steps: when triggered by a surge impact, the protection unit is broken down; after detecting that the protection unit is broken down, the alarm unit generates a corresponding alarm signal and sends it to the second conversion unit; the alarm signal after conversion by the second conversion unit is obtained, and the alarm signal and / or the current state of the protection unit are displayed in the control system.

[0015] Based on the same concept, the present application further provides an electronic device comprising a memory for storing a processing program and a processor for implementing the backplane type surge protection method when executing the processing program.

[0016] The present application has the following advantages and positive effects compared with the prior art due to the use of the above technical solutions:

[0017] 1. The present application designs the surge protection system into a split structure with a surge function module and a base module, and the surge function module and the backplane module are connected through a connector, thereby realizing quick connection of inter-disk wiring, reducing field wiring, improving installation and maintenance efficiency, and reducing the risk of human error.

[0018] 2. The present application installs the lightning protection tube and the temperature fuse adjacent in space structure so that the heat generated by the lightning protection tube when triggered for surge protection can cause the temperature fuse to melt, and when an electric surge threat occurs, the lightning protection tube is broken down under the action of overvoltage or overcurrent and generates a large amount of heat, causing the fuse to melt, thereby causing the broken-down lightning protection tube to be disconnected from the system, avoiding the influence of the broken-down short-circuit lightning protection tube on the system.

[0019] 3. The present application sets an MCU processor and a communication circuit on the backplane module, processes the alarm signals of each lightning protection tube in the system and sends them to the system, simplifies the wiring of the alarm terminal, and processes the alarm signals of multiple lightning protection tubes and sends them to the system through the communication circuit, thereby saving system points and improving the accommodation capacity of the system.

[0020] 4. This invention transmits the protected signal to the baseboard module via a connector. The baseboard module is designed with a dedicated interface, which communicates with the control system through the dedicated interface and dedicated cable, reducing on-site wiring, saving control system points, and reducing the risk of errors. Attached Figure Description

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the system configuration of the base plate type surge protection system of the present invention;

[0023] Figure 2 This is a schematic diagram of the fault alarm configuration of the base plate type surge protection system of the present invention;

[0024] Figure 3 This is a circuit diagram of the surge protection module of the present invention;

[0025] Figure 4 This is a circuit schematic diagram of the second conversion unit MCU and its power supply unit of the present invention;

[0026] Figure 5 This is a schematic diagram of the RS485 communication circuit of the second conversion unit of the present invention; Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] First Embodiment

[0030] like Figure 1 As shown, a base-mounted surge protection system includes a surge function module 100 and a base-mount module 200. The surge function module 100 and the base-mount module 200 are electrically connected via a connector. Unprotected signal lines of field instruments are connected to the surge function module 100, and the surge function module 100 is electrically connected to the protected signal lines of the base-mount module 200 via a connector. (See attached image) Figure 3The surge function module 100 comprises an access unit 101, a protection unit 102, an alarm unit 103, a grounding unit 104 and an output unit 105 electrically connected with the field instrument, the input end of the protection unit 102 is electrically connected with the output end of the access unit 101, the output end of the protection unit 102 is electrically connected with the input end of the output unit 105, the alarm unit 103 is electrically connected with the protection unit 102, the grounding unit 104 is electrically connected with the protection unit 102, and the output end of the output unit 105 is electrically connected with the first conversion unit 201 of the backplane module 200. Figure 2 The alarm output end of the alarm unit 103 of the surge function module 100 is electrically connected with the backplane module 200 through a connector, and a fault alarm signal is input to the second conversion unit 202 of the backplane module 200.

[0031] It should be noted that the connector is a connector or a connector, which has a male end and a female end and can transmit information or current after contact.

[0032] The above is connected by using the connector to connect the surge function module 100 and the backplane module 200, the protected signal is converted by the first conversion unit 201 in the backplane module 200 and connected with the control system through a special cable, which solves the problem of complex system wiring and multiple wiring in the low-voltage direct-current scene, improves the reliability, economy and maintainability. By setting the alarm unit 103, the protection unit 102 that is broken down by surge voltage / current can be identified and sent to the control system in time to avoid interfering with the normal work of the system.

[0033] Preferably, the access unit 101 comprises a first access point A and a second access point B, the first access point A is connected with the input end of the protection unit 102 through a first diode D1, and the second access point B is connected with the input end of the protection unit 102 through a third diode D3.

[0034] Preferably, the grounding unit comprises a twelfth diode D10 and a ninth diode D9 connected in series, and the output end of the twelfth diode D10 is electrically connected with the grounding terminal of the backplane module 200.

[0035] Preferably, the output unit 105 comprises a second diode D2 and a fourth diode D4 electrically connected with the output end of the protection unit 102, respectively.

[0036] Referring to Figure 3In one embodiment of the present application, the protection unit 102 comprises a temperature fuse F1 and a lightning protection tube TVS1 in series, the temperature fuse F1 is electrically connected with the output of the access unit 101 through a first diode D1, and the temperature fuse F1 and the lightning protection tube TVS1 are installed in close spatial structure so that the heat generated by the lightning protection tube TVS1 when triggered surge protection can make the temperature fuse F1 fuse.

[0037] When threatened by surge, the fuse F1 can timely disconnect the failed lightning protection tube TVS1 from the system to avoid interfering with the transmission of normal signals of the system. According to the fact that there are many field industrial control signal points and the installation and wiring are complex, the bottom plate type surge protection system is creatively designed in the present application, which greatly simplifies the wiring of the surge protection system to the control system side, and the alarm signals of a large number of points no longer need to be connected to the DI points of the control system controller one by one, thereby greatly saving the DI point resources of the system. Through the connection of special cables, it is safe and reliable, the wiring is simple, and a large amount of cable and wiring space is saved. At the same time, the broken line alarm circuit of the bottom plate type surge protection system can not only indicate the failure of the lightning protection tube, but also when subjected to surge impact, the lightning protection tube TVS1 is broken down, and a large amount of heat is generated, so that the fuse F1 is fused, and the failed lightning protection tube TVS1 is disconnected from the system, thereby greatly improving the reliability and maintainability of the system.

[0038] Referring to Figure 3 In one embodiment of the present application, the alarm unit 103 is connected in parallel with the temperature fuse F1, the alarm unit 103 comprises a current limiting resistor R1, an optical coupler OPT2 and a light emitting diode LED1 in series, the alarm signal output ends ALARM+ and ALARM- of the optical coupler OPT2 are electrically connected with the input of the second conversion unit 202, and the second conversion unit 202 converts and sends the alarm signal of the optical coupler OPT2 to the control system.

[0039] Specifically, when the surge function module is working normally, the temperature fuse F1 has a very small resistance, the current limiting resistor R1, the large-current optocoupler OPT2, the light emitting diode LED1 and the temperature fuse F1 are connected in parallel, which is equivalent to being bypassed, and at this time, the surge protection tube TVS1 is not working. When a surge impact is received, the surge protection tube TVS1 is broken down, and a large amount of heat is generated, so that the fuse F1 is fused, at this time, the current direction is: A→the first diode D1→the current limiting resistor R1→the large-current optocoupler OPT2→the light emitting diode LED1→the surge protection tube TVS1 (in a hot-fused short-circuit state)→the diode D4, the light emitting diode LED1 is lighted, indicating that the surge protection tube TVS1 has been damaged, the optocoupler OPT2 is closed, and the alarm output signal is transmitted to the second conversion unit 202 of the bottom plate module 200, and after being processed by the second conversion unit 202, the alarm output signal is sent to the control system.

[0040] By arranging the optocoupler OPT2 and the second conversion unit 202, the failure state of the surge protection tube TVS1 can be effectively monitored, and the failure alarm can be transmitted to the system.

[0041] Referring to Figure 4 In an embodiment of the present application, the second conversion unit 202 includes an MCU processor and a power supply circuit thereof, the alarm signal output ends ALARM+ and ALARM- of the optocoupler OPT2 are electrically connected to signal input pins of the MCU processor, and the MCU processor sends the alarm signal of the optocoupler OPT2 to the control system after processing.

[0042] In an embodiment of the present application, specifically, the MCU processor is FM33LC045N.

[0043] Referring to Figure 5 In an embodiment of the present application, the second conversion unit 202 further includes a communication circuit electrically connected to signal output pins of the MCU processor, and the communication circuit is used for converting the output signal of the MCU processor into a preset signal and sending the preset signal to the control system.

[0044] Specifically, referring to Figure 5 In an embodiment of the present application, the communication circuit is an RS485 communication circuit, which includes an SN75HVD12DR chip and a power supply circuit and a signal processing circuit thereof electrically connected to signal output pins of the MCU processor. Specifically, the signal output pins of the MCU processor are connected to the RS485 communication line through the SN75HVD12DR chip.

[0045] Referring to Figures 1-2In an embodiment of the present application, the protection system comprises a plurality of surge function modules 100 and a backplane module 200 connected with the plurality of surge function modules, the grounding units 104 of the plurality of surge function modules 100 are connected in parallel with a system grounding terminal, and the alarm signal output ends of the plurality of alarm units 103 are electrically connected with different input ports of the second conversion unit 202 having the same function. Figure 4 The alarm signal output ends of the plurality of alarm units 103 are respectively electrically connected with the first to twelfth pins or one of the eighteenth to twenty-first pins of the MCU processor.

[0046] Referring to Figure 4 In this embodiment, the failure alarm signals of the 16 surge function modules are first processed by the second conversion unit on the backplane module and then transmitted to the control system through a dedicated cable for state detection, which is real-time and efficient. Meanwhile, the signal type of the alarm output (such as DO signal output, RS485 output, etc.) can be converted. This greatly saves the DI port resources for monitoring the failure of the protection unit, and other signal type ports can be used for detecting the alarm output of the protection unit.

[0047] The embodiments of the present application have at least the following advantages:

[0048] 1. The surge protection system is designed as a split structure with surge function modules and a base module, and the surge function modules and the backplane module are connected through connectors, thereby realizing quick connection of inter-panel wiring, reducing field wiring, improving installation and maintenance efficiency, and reducing the risk of human error.

[0049] 2. The lightning protection tube and the temperature fuse are installed adjacent in space structure, so that the heat generated by the lightning protection tube when triggering surge protection can cause the temperature fuse to melt. When an electric surge threat occurs, the lightning protection tube is broken down under the action of overvoltage or overcurrent and generates a large amount of heat, which melts the fuse, so that the broken lightning protection tube is disconnected from the system, avoiding the influence of the broken short-circuit lightning protection tube on the system.

[0050] 3. The MCU processor and the communication circuit are arranged on the backplane module, and the alarm signals of each lightning protection tube in the system are processed and sent to the control system, which simplifies the wiring of the alarm terminals and saves system points and improves the accommodation capacity of the system.

[0051] 4. The protected signals are sent to the backplane module through connectors, and the backplane module is designed with a special interface for communication with the control system through a dedicated cable, which reduces field wiring, saves control system points, and reduces the risk of error.

[0052] Second embodiment

[0053] Based on the same concept, the application also provides a backplane surge protection method, applied to the backplane surge protection system described in any of the above, comprising the following steps:

[0054] When triggered by a surge impact, the protection unit 102 is broken down; the alarm unit 103 detects that the protection unit 102 is broken down, generates a corresponding alarm signal and sends it to the second conversion unit 202; the alarm signal after conversion by the second conversion unit 202 is obtained, and the alarm signal and / or the current state of the protection unit 102 are displayed in the control system.

[0055] Specifically, when a surge impact is received, the lightning protection tube TVS1 is broken down, and a large amount of heat is generated, causing the fuse F1 to melt. At this time, the current direction is: A→first diode D1→current limiting resistor R1→high current optical coupler OPT2→light emitting diode LED1→lightning protection tube TVS1 (in a hot short-circuit state)→diode D4, the light emitting diode LED1 is lit, indicating that the lightning protection tube TVS1 has been damaged, the optical coupler OPT2 is closed, and the optical coupler OPT2 output pins alarm+ and alarm- are closed and conductive. This alarm output signal is transmitted to the second conversion unit 202 of the backplane module 200, and after being processed by the second conversion unit 202, it is sent to the control system through the RS485 signal line.

[0056] Third embodiment

[0057] Based on the same concept, the application provides an electronic device, comprising: a memory for storing a processing program; a processor for executing the processing program to implement the backplane surge protection method described in any of the above.

[0058] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0059] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the above embodiments. Even if various changes are made to the application, as long as the changes fall within the scope of the claims of the application and their equivalent technologies, they still fall within the protection scope of the application.

Claims

1. A backplane surge protection system, characterized by, The surge function module comprises an access unit, a protection unit, an alarm unit, a grounding unit and an output unit which are electrically connected with the equipment to be protected, the input end of the protection unit is electrically connected with the output end of the access unit, the output end of the protection unit is electrically connected with the output unit, the alarm unit is electrically connected with the protection unit, and the grounding unit is electrically connected with the protection unit; the protection unit comprises a temperature fuse and a lightning protection tube connected in series, the temperature fuse is electrically connected with the output end of the access unit through a first diode and a third diode respectively, and the temperature fuse and the lightning protection tube are installed in close proximity in a spatial structure so that the heat generated by the lightning protection tube when triggering surge protection can make the temperature fuse fuse; the alarm unit is connected in parallel with the temperature fuse, the alarm unit comprises a photoelectric coupler and a light emitting diode connected in series, the alarm signal output end of the photoelectric coupler is electrically connected with the input end of a second conversion unit, and the second conversion unit sends the alarm signal converted by the photoelectric coupler to a control system; the output unit comprises a second diode and a fourth diode which are electrically connected with the output end of the protection unit respectively; The bottom plate module comprises a signal conversion unit, the signal conversion unit comprises a first conversion unit and a second conversion unit, the input end of the first conversion unit is electrically connected with the output end of the output unit through a connector, and the input end of the second conversion unit is electrically connected with the alarm output end of the alarm unit through a connector; the second conversion unit comprises an MCU processor and a power supply circuit thereof, the alarm signal output end of the photoelectric coupler is electrically connected with the signal input pin of the MCU processor, and the MCU processor sends the alarm signal of the photoelectric coupler to a control system after processing. The model of the MCU processor is FM33LC045N.

2. The backplane surge protection system of claim 1, wherein, The second conversion unit further comprises a communication circuit electrically connected with the signal output pin of the MCU processor, and the communication circuit is used for converting the output signal of the MCU processor into a preset signal and sending the preset signal to the control system.

3. The backplane surge protection system of claim 1, wherein, The communication circuit is an RS485 communication circuit, which comprises an SN75HVD12DR chip and a power supply circuit and a signal processing circuit thereof electrically connected with the signal output pin of the MCU processor.

4. The backplane surge protection system of claim 3, wherein, The protection system comprises a plurality of surge function modules and a bottom plate module connected with the plurality of surge function modules, the grounding units of the plurality of surge function modules are connected in parallel and connected with a system grounding terminal, and the alarm signal output ends of the plurality of alarm units are electrically connected with different input ports with the same function of the second conversion unit.

5. The backplane surge protection system of claim 1, wherein, The method comprises the following steps:

6. A backplane surge protection method applied to the backplane surge protection system of any one of claims 1 to 5, characterized in that, When surge protection is triggered by surge impact, the protection unit is broken down; After the alarm unit detects that the protection unit is broken down, the corresponding alarm signal is generated and sent to the second conversion unit; The alarm signal converted by the second conversion unit is acquired, and the alarm signal and / or the current state of the protection unit are displayed in the control system. The method comprises the following steps:

7. An electronic device, comprising: The memory is used for storing a processing program. ​ A processor, when executing the processing program, implements the method for surge protection of a backplane as claimed in claim 6.

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