End-forming lightning stroke monitoring device and end-forming monitoring device

Abstract

The utility model relates to the field of formed end monitoring, in particular to a formed end lightning stroke monitoring device and a formed end monitoring device. The formed end lightning stroke monitoring device provided by the utility model comprises a first processing module and a monitoring module, and the monitoring module comprises a first sensor unit matched with a cable formed end and a second sensor unit matched with a collecting bar; the first sensor unit is used for outputting a position signal to the first processing module when current larger than a first threshold value flows through the cable forming end, and the second sensor unit is used for outputting a current value signal to the first processing module when current larger than a second threshold value flows through the collecting drain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of end monitoring, especially to an end lightning monitoring device and an end monitoring device. BACKGROUND

[0002] In recent years, with the continuous improvement of railway transportation efficiency, the railway signal as the train control system, the safety and reliability requirements are also higher and higher. The signal cable is the central nervous system of the control system, and its reliable operation is related to the safety of the whole control system, and the reliability of the cable grounding system is a powerful guarantee for the normal operation of the system. The traditional cable end grounding method is to connect the aluminum sheath and the armored steel belt of the cable with the grounding copper bar through the grounding terminal. In order to solve the monitoring of the end grounding, the existing railway signal cable end online monitoring system can monitor the power frequency current, lightning times, fault arc and environmental temperature and humidity of the grounding terminal of each cable end box.

[0003] For the monitoring of lightning current, the traditional scheme directly monitors the cable end, and the disadvantage is that the sensor equipment cost of measuring lightning current information is high. If a sensor equipment capable of measuring lightning current information is configured for each cable end, the number of cable ends is large, and the cost of the cable end lightning monitoring system is high. UTILITY MODEL CONTENTS

[0004] On the one hand, the utility model provides a kind of end lightning monitoring device, can reduce cable end lightning monitoring system cost under the condition that the number of cable end is more;

[0005] The end lightning monitoring device provided by the utility model includes first processing module and monitoring module, the monitoring module includes the first sensor unit matched with cable end and the second sensor unit matched with collection row;The first sensor unit is used to output position signal to the first processing module when the current greater than the first threshold value flows through the cable end, and the second sensor unit is used to output current value signal to the first processing module when the current greater than the second threshold value flows through the collection row.

[0006] Further, the first sensor unit includes current transformer and lightning counting circuit, and the second sensor unit includes lightning mutual inductor.

[0007] Further, the first sensor unit further includes first processing unit, the lightning counting circuit includes external sampling resistor and rectifier bridge, the secondary side of the current transformer is coupled with the external sampling resistor, and the rectifier bridge is coupled with the first processing unit;The first processing unit is electrically connected with the first processing module.

[0008] Further, the second sensor unit comprises a second processing unit, a secondary side of the lightning strike mutual inductor is coupled with the second processing unit; the second processing unit is electrically connected with the first processing module.

[0009] Further, the monitoring module comprises at least two first sensor units, the first processing units in the at least two first sensor units are respectively electrically connected with the first processing module through two buses.

[0010] Further, the first processing unit comprises a first communication unit and a first power unit, the first communication unit and the first power unit are respectively electrically connected with the two buses.

[0011] Further, the monitoring module comprises at least two second sensor units, the second processing units in the at least two second sensor units are respectively electrically connected with the first processing module through two buses.

[0012] Further, the second processing unit comprises a second communication unit and a second power unit, the second communication unit and the second power unit are respectively electrically connected with the two buses.

[0013] Further, the first processing module comprises at least two ports, each port is electrically connected with a group of the two buses.

[0014] The end monitoring device provided by the utility model, including current sampling circuit, current sampling circuit is coupled with current mutual inductor through external sampling resistance, current mutual inductor is matched with cable end, current sampling circuit is coupled with the first sensor unit in the end lightning strike monitoring device of any one of above-mentioned.

[0015] Beneficial effect

[0016] The scheme is configured with a first sensor unit capable of outputting a position signal when lightning current flows on each cable end, so that the position determination of the cable end flowing through lightning current is realized;The monitoring of lightning current size is realized through the second sensor unit capable of measuring lightning current information arranged on the collection row, the second sensor unit is consistent with the device for measuring lightning current information in the conventional scheme, the lightning current size can be monitored, the first processing module receives the position signal output by the first sensor unit when the current flowing through the cable end is greater than the first threshold value, and the current value signal output by the second sensor unit when the current flowing through the collection row is greater than the second threshold value, and matches the two, so that the monitoring of the lightning current size of more cable ends is realized with lower cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is the overall schematic diagram of the end-of-line lightning monitoring device provided by the first embodiment to the fourth embodiment of the present application;

[0019] Figure 2 is the schematic diagram of the first sensor unit and the second sensor unit module provided by the first embodiment of the present application;

[0020] Figure 3 is the internal module schematic diagram of the first sensor unit provided by the first embodiment and the fourth embodiment of the present application;

[0021] Figure 4 is the current sampling circuit schematic diagram provided by the fourth embodiment of the present application;

[0022] Figure 5 is the lightning counting circuit schematic diagram provided by the first embodiment of the present application;

[0023] Figure reference: 1-first processing module; 2-first sensor unit; 3-second sensor unit; 4-current transformer; 5-lightning counting circuit; 6-current sampling circuit; 7-first processing unit; 8-second processing unit; 9-lightning transformer; 10-two buses; 11-first power supply unit; 12-first communication unit; 13-secondary side; 14-external sampling resistor; 15-rectifier bridge. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0025] Embodiment one

[0026] An end-of-line lightning monitoring device, comprising a first processing module 1 and a monitoring module, the monitoring module comprising a first sensor unit 2 cooperating with the cable end and a second sensor unit 3 cooperating with the collection row; the first sensor unit 2 is used to output a position signal to the first processing module 1 when the current flowing through the cable end is greater than the first threshold value, and the second sensor unit 3 is used to output a current value signal to the first processing module 1 when the current flowing through the collection row is greater than the second threshold value.

[0027] The cable end flows through the current through the collection drain, the cable end lightning strike monitoring system monitors the current flowing through the cable end, and the current flowing through the collection drain, when there is a lightning current, the monitoring module in the end lightning strike monitoring device obtains the position signal of the cable end flowing through the lightning current and the current value signal of the lightning current of the collection drain, the first processing module 1 judges the path of the lightning current flowing through the position signal and the current value signal, and matches the current value signal and the position signal obtained by monitoring, and then obtains the current size of the lightning current flowing through the cable end corresponding to the position signal.

[0028] Compared with the traditional scheme of directly monitoring the cable end, the current size of the lightning current flowing through the cable end is obtained, and the scheme is suitable for the case that the number of cable ends is large. The sensor device for measuring lightning current information has high cost. If each cable end is configured with a sensor device capable of measuring lightning current information, the number of cable ends is large, and the cost of the cable end lightning monitoring system is high.

[0029] The scheme configures a first sensor unit 2 capable of outputting a position signal when a lightning current flows through each cable end, thereby realizing the position determination of the cable end flowing through the lightning current; the monitoring of the lightning current size is realized by configuring a second sensor unit 3 capable of measuring lightning current information on the collection drain. The second sensor unit 3 is consistent with the device for measuring lightning current information in the traditional scheme, which can monitor the size of the lightning current. The first processing module 1 receives the position signal output by the first sensor unit 2 when the current flowing through the cable end is greater than the first threshold value, and the current value signal output by the second sensor unit 3 when the current flowing through the collection drain is greater than the second threshold value, and matches the two, thereby realizing the monitoring of the lightning current size of the large number of cable ends with low cost.

[0030] In an optional embodiment, the first sensor unit 2 includes a current transformer 4 and a lightning counting circuit 5, and the second sensor unit 3 includes a lightning transformer 9.

[0031] The scheme configures a current transformer 4 and a lightning counting circuit 5 capable of outputting an electrical signal when a lightning current flows through each cable end. The above elements are integrated into the first sensor unit 2. Compared with the sensor device for measuring lightning current information used in the traditional scheme, the sensor device in the scheme mainly realizes the discrimination of the lightning current through the rectifier bridge 15 in the lightning counting circuit 5; the monitoring of the lightning current size is realized by configuring the lightning transformer 9 capable of measuring lightning current information on the collection drain.

[0032] In an alternative embodiment, the first sensor unit 2 further comprises a first processing unit 7, the lightning stroke counting circuit 5 comprises an external sampling resistor 14 and a rectifier bridge 15, the secondary side 13 of the current transformer 4 is coupled with the external sampling resistor 14, and the rectifier bridge 15 is coupled with the first processing unit 7; the first processing unit 7 is electrically connected with the first processing module 1.

[0033] The external sampling resistor 14 converts the current signal of the secondary side 13 of the current transformer 4 into a voltage signal. Generally, the voltage value of the voltage signal converted by the external sampling resistor 14 cannot make the rectifier bridge 15 conduct, so the voltage signal cannot be transmitted to the port of the first processing unit 7 corresponding to the lightning stroke event. When a lightning stroke event occurs, the voltage value of the voltage signal converted by the external sampling resistor 14 reaches a threshold value that makes the rectifier bridge 15 conduct. The voltage signal passing through the rectifier bridge 15 is output to the first processing unit 7. The first processing unit 7 determines the triggering of the lightning stroke event through the voltage signal and outputs a preset position signal to the first processing module 1.

[0034] In an alternative embodiment, the second sensor unit 3 comprises a second processing unit 8, and the secondary side 13 of the lightning stroke transformer 9 is coupled with the second processing unit 8; the second processing unit 8 is electrically connected with the first processing module 1.

[0035] The first processing unit 7 determines the triggering of the lightning stroke event through the voltage signal and outputs a preset position signal to the first processing module 1, while outputting the first time information, i.e. the time when the lightning stroke current is monitored by the current transformer 4 on the cable end. When the lightning stroke current is discharged through the collection drain, the lightning stroke transformer 9 at the collection drain sends a lightning stroke current signal to the second processing unit 8. The second processing unit 8 outputs the lightning stroke current information to the first processing module 1, while outputting the second time information, i.e. the time when the lightning stroke current is monitored by the lightning stroke transformer 9 on the collection drain. After receiving the position signal and the lightning stroke current information, the first processing module 1 compares the first time information and the second time information. When the time difference between the two is less than a preset threshold, it is ensured that the position signal and the lightning stroke current information are for the same lightning stroke event.

[0036] Embodiment Two

[0037] In an alternative embodiment, the monitoring module comprises at least two first sensor units 2, and the first processing units 7 in the at least two first sensor units 2 are respectively electrically connected with the first processing module 1 through the two buses 10.

[0038] The scheme is applicable to the case of multiple cables, each cable corresponds to two cable terminals, which are matched with the aluminum sheath and steel tape of the cable respectively. The cable terminal matched with the aluminum sheath of each cable is connected with one collection row, and the cable terminal matched with the steel tape of each cable is also connected with one collection row, thereby forming a cable group. Each cable terminal in the cable group is matched with one first sensor unit 2, and each collection row is matched with one second sensor unit 3.

[0039] The first processing unit 7 in the first sensor unit 2 is connected with the first processing module 1 through the two-wire bus 10. The communication and power supply between the first processing module 1 and the first processing unit 7 are realized by the connection mode of the two-wire bus 10, which simplifies the construction of the cable. When the number of cables is large, the above-mentioned first processing unit 7 is grouped into a group through the two-wire bus 10, and the first processing module 1 only needs one port to realize the electrical connection between the group and the first sensor unit 2.

[0040] In an optional embodiment, the first processing unit 7 includes a first communication unit 12 and a first power supply unit 11, and the first communication unit 12 and the first power supply unit 11 are respectively connected with the two-wire bus 10.

[0041] A group of two-wire buses 10 is two wires, including a positive wire and a negative wire, and communication is realized through the first communication unit 12 in the first processing module 1 and the first processing unit 7. The first processing module 1 sends information to the first processing unit 7 through voltage change, and the first processing unit 7 sends information to the first processing module 1 through current change.

[0042] Embodiment three

[0043] In an optional embodiment, the monitoring module includes at least two second sensor units 3, and the second processing unit 8 in the at least two second sensor units 3 is respectively connected with the first processing module 1 through the two-wire bus 10.

[0044] The scheme is applicable to the case of multiple groups of cable groups in embodiment two, and the second processing unit 8 in the second sensor unit 3 in each cable group is connected with the first processing module 1 through the two-wire bus 10. The communication and power supply between the first processing module 1 and the second processing unit 8 are realized by the connection mode of the two-wire bus 10, which simplifies the construction of the cable. When the number of cable groups is large, the first processing module 1 only needs one port to realize the electrical connection between the multiple second sensor units 3.

[0045] In an optional embodiment, the second processing unit 8 includes a second communication unit and a second power supply unit, and the second communication unit and the second power supply unit are respectively connected with the two-wire bus 10.

[0046] A set of two bus lines 10 is formed by two lines, including a positive line and a negative line, and communication is achieved through the first processing module 1 and the second communication unit in the second processing unit 8. The first processing module 1 sends information to the second processing unit 8 through voltage changes, and the second processing unit 8 sends information to the first processing module 1 through current changes.

[0047] In an alternative embodiment, the first processing module 1 includes at least two ports, each port being electrically connected to a set of two bus lines 10. The ports of the first processing module 1 are respectively connected to the two bus lines 10 connected to the second processing unit 8 and the two bus lines 10 connected to the first processing unit 7.

[0048] Embodiment Four

[0049] A terminal monitoring device includes a current sampling circuit 6 coupled to a current transformer 4 through an external sampling resistor 14, the current transformer 4 being matched with the cable terminal, and the current sampling circuit 6 being coupled to the first sensor unit 2 in any of the terminal lightning strike monitoring devices described above.

[0050] The terminal monitoring device can collect current information flowing through the cable terminal through the current transformer 4 matched with the cable terminal, the current transformer 4 being electrically connected to the first processing unit 7 through the current sampling circuit 6 and the lightning strike counting circuit 5 in Embodiment One, the first processing unit 7 converting the analog signal of the current transformer 4 into a digital signal, and processing current, arc, and lightning strike data according to the signal of the current transformer 4.

[0051] Specifically, the current sampling circuit 6 and the lightning stroke counting circuit 5 are arranged on a circuit board where the first processing unit 7 is located, the current transformer 4 is connected with the current sampling circuit 6 through an interface, the leakage current of the current sampling circuit 6 is collected through the current transformer 4, the current of the primary side of the current transformer 4 is collected to the secondary side 13, and the current signal of the secondary side 13 is converted into a voltage signal through the external sampling resistor 14, then the voltage signal is amplified and transmitted to the corresponding port of the first processing unit 7, the first processing unit 7 calculates the current value of the leakage current through the voltage signal, and obtains the judgment about the fault arc through software analysis. The current transformer 4 is also connected with the lightning stroke counting circuit 5, specifically, the current signal of the secondary side 13 is converted into a voltage signal through the external sampling resistor 14, the lightning stroke counting circuit 5 is provided with a rectifier bridge 15, the voltage value of the voltage signal converted by the external sampling resistor 14 cannot make the rectifier bridge 15 conduct, so the voltage signal cannot be transmitted to the port corresponding to the lightning stroke event of the first processing unit 7, when the lightning stroke event occurs, the voltage value of the voltage signal converted by the external sampling resistor 14 reaches the threshold value of making the rectifier bridge 15 conduct, the voltage signal output through the rectifier bridge 15 is output to the port corresponding to the lightning stroke event of the first processing unit 7, the first processing unit 7 determines the triggering of the lightning stroke event through the voltage signal, and outputs the position signal to the first processing module 1.

[0052] It should be noted that any of the above embodiments is illustrative of the present application rather than limiting the present application, and a person skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs located between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unitary claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second and the like does not imply any ordering, but such words are used to identify different claims. These claims can be construed as alternatives.

[0053] The above embodiments are only suitable for illustrating the present application, but not limiting the present application, and a person skilled in the related art can make various changes and modifications without departing from the spirit and scope of the present application, therefore all equivalent technical solutions also belong to the scope of the present application, and the patent protection scope of the present application should be defined by the claims.

Claims

1. An end-of-life lightning strike monitoring device, characterized in that, The monitoring module comprises a first sensor unit (2) matched with a cable end and a second sensor unit (3) matched with a collection row through which the cable end flows; the first sensor unit (2) is used to output a position signal to the first processing module (1) when the cable end flows through a current greater than a first threshold value; the second sensor unit (3) is used to output a current value signal to the first processing module (1) when the collection row flows through a current greater than a second threshold value; The first sensor unit (2) comprises a current transformer (4) and a lightning stroke counting circuit (5); the second sensor unit (3) comprises a lightning stroke transformer (9); The first sensor unit (2) further comprises a first processing unit (7); the first processing unit (7) is electrically connected with the first processing module (1); The second sensor unit (3) comprises a second processing unit (8); a secondary side (13) of the lightning stroke transformer (9) is coupled with the second processing unit (8); the second processing unit (8) is electrically connected with the first processing module (1); The first processing unit (7) determines a lightning stroke event through a voltage signal and outputs a preset position signal to the first processing module (1); the lightning stroke transformer (9) at the collection row sends a lightning stroke current signal to the second processing unit (8), and the second processing unit (8) outputs lightning stroke current information to the first processing module (1).

2. The terminated lightning strike monitoring device of claim 1, wherein, The lightning stroke counting circuit (5) comprises an external sampling resistor (14) and a rectifier bridge (15); the secondary side (13) of the current transformer (4) is coupled with the external sampling resistor (14); and the rectifier bridge (15) is coupled with the first processing unit (7).

3. The terminated lightning strike monitoring device of claim 2, wherein, The monitoring module comprises at least two first sensor units (2); the first processing units (7) in the at least two first sensor units (2) are respectively electrically connected with the first processing module (1) through a two-wire bus (10).

4. The terminated lightning strike monitoring device of claim 3, wherein, The first processing unit (7) comprises a first communication unit (12) and a first power supply unit (11); the first communication unit (12) and the first power supply unit (11) are respectively electrically connected with the two-wire bus (10).

5. The terminated lightning strike monitoring device of claim 2, wherein, The monitoring module comprises at least two second sensor units (3); the second processing units (8) in the at least two second sensor units (3) are respectively electrically connected with the first processing module (1) through the two-wire bus (10).

6. The terminated lightning strike monitoring device of claim 5, wherein, The second processing unit (8) comprises a second communication unit and a second power supply unit; the second communication unit and the second power supply unit are respectively electrically connected with the two-wire bus (10).

7. The terminated lightning strike monitoring device of claim 3 or 5, wherein, The first processing module (1) comprises at least two ports; each port is electrically connected with a group of the two-wire bus (10).

8. An end-of-life monitoring device comprising a current sampling circuit (6), characterized in that, The current sampling circuit (6) is coupled with the current transformer (4) through an external sampling resistor (14), the current transformer (4) is matched with the cable, and the current sampling circuit (6) is coupled with the first sensor unit (2) in the end-on lightning stroke monitoring device of any one of claims 1-7.

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