Integrated relay system for rail transit

Abstract

The application discloses a kind of integrated relay systems for rail transit, including cabinet, mainboard, backplate and multiple relay modules, each the relay module is inserted in the cabinet, the backplate is installed on the back of the cabinet, each the relay module is electrically connected with backplate, and the backplate is electrically connected with the mainboard;Each the relay module includes adapter board and monitoring board, multiple relays are installed on the adapter board, all points of each the relay are led to the first connector at one end of adapter board by printed circuit on adapter board, and the first connector on the adapter board is butted with the second connector on the backplate to realize the electrical connection of adapter board and backplate;The monitoring board is used to monitor each electrical parameter of relay on adapter board;Monitoring board and adapter board are arranged in parallel and electrically connected by third connector.The application has high integration, strong reliability, convenient maintenance, convenient wiring, and has on-line monitoring function.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the relay technology field, and in particular to an integrated relay system for rail transit. BACKGROUND

[0002] At present, there are numerous occasions in which relays are used as switching switches in the industrial field. In order to improve reliability, basically, brand, high price, silver-plated contact relays are used, or the relays are removed for detection of good or bad by professional detection devices, or an alternating current or direct current signal is actively added to detect the relays. In terms of integration, basically, the bases matched with the relays are used, and then the bases are installed in cabinets for integration, so that the integration is not high. SUMMARY

[0003] The technical problem to be solved by the present application is that, in view of the technical problems existing in the prior art, the present application provides an integrated relay system for rail transit, which has high integration, high reliability, convenient maintenance, convenient wiring, and an online monitoring function.

[0004] To solve the above technical problems, the technical solution provided by the present application is as follows:

[0005] An integrated relay system for rail transit, comprising a case, a main board, a back plate and a plurality of relay modules, each of the relay modules is inserted into the case, the back plate is installed on the back of the case, each of the relay modules is electrically connected with the back plate, and the back plate is electrically connected with the main board.

[0006] Each of the relay modules comprises a relay adapter plate and a monitoring plate, a plurality of relays are installed on the relay adapter plate, all points of each of the relays are led to a first connector at one end of the relay adapter plate through printed circuits on the relay adapter plate, and the first connector on the relay adapter plate is connected with a second connector on the back plate to realize electrical connection between the relay adapter plate and the back plate.

[0007] The monitoring plate is used to monitor various electrical parameters of the relays on the relay adapter plate, and the monitoring plate and the relay adapter plate are arranged in parallel and electrically connected through a third connector.

[0008] As a further improvement of the above technical solution:

[0009] The third connector is a gold-plated connector, and each two pins are connected in parallel to correspond to the same signal.

[0010] A support column is arranged between the relay adapter plate and the monitoring plate, and the relay adapter plate and the monitoring plate are fastened at both ends of the support column by fixing bolts.

[0011] The chassis is provided with a plurality of card slots arranged side by side, the front of each chassis is provided with a plurality of openings corresponding to the card slots, the back plate is installed on the back of the chassis, and the second connector on the back plate is opposite to the card slots, the relay module is inserted from the opening and clamped in the card slot, and the first connector on the adapter plate is connected to the second connector on the back plate.

[0012] The monitoring display terminal is electrically connected with the main board and used for monitoring and displaying various electrical parameters of the relay.

[0013] The monitoring board comprises a relay contact monitoring circuit for monitoring the contact voltage difference and the contact current to calculate the contact resistance.

[0014] The relay contact monitoring circuit comprises a resistor R1, resistors RL1 and RL2, a first operational amplifier, a second operational amplifier and a third operational amplifier, one end of the resistor R1 is connected to a DC 110V power supply, the other end of the resistor R1 is connected to the common end of the contact, one end of the resistor RL1 and the resistor RL2 is connected to the selected end of the contact respectively, the other end of the resistor RL1 and the resistor RL2 is grounded, the input ends of the first operational amplifier are connected to the two ends of the resistor R1 respectively, the input ends of the second operational amplifier are connected to the common end and one selected end of the contact respectively, the input ends of the third operational amplifier are connected to the common end and the other selected end of the contact respectively, the output ends of the first operational amplifier, the second operational amplifier and the third operational amplifier are connected to the input end of a first analog switch, the output end of the first analog switch is connected to the control module through a first ADC module, and the first operational amplifier, the second operational amplifier and the third operational amplifier are high common-mode voltage operational amplifiers.

[0015] The monitoring board comprises a relay coil monitoring circuit for monitoring the voltage and current of the relay coil.

[0016] The relay coil monitoring circuit comprises a resistor R11, resistors R2 and R3, a fourth operational amplifier and a fifth operational amplifier, one end of the resistor R11 is connected to a DC 110V power supply, the other end of the resistor R11 is connected to one end of the coil and one end of the resistor R2, the other end of the resistor R2 is grounded through the resistor R3, the other end of the coil is grounded, the input ends of the fourth operational amplifier are connected to the two ends of the resistor R11, the input ends of the fifth operational amplifier are connected to the two ends of the resistor R3, the output ends of the fourth operational amplifier and the fifth operational amplifier are connected to the input end of a second analog switch, the output end of the second analog switch is connected to the control module through a second ADC module, and the fourth operational amplifier and the fifth operational amplifier are high common-mode voltage operational amplifiers.

[0017] The number of relays on the adapter plate is 4-8.

[0018] Compared with the prior art, the application has the advantages of:

[0019] The application adopts a board card type structure in the aspect of integration, each adapter board can install a plurality of (such as 4-6) relays, and finally the adapter boards are integrated in a standard 6U cabinet, so that all the adapter boards are integrated as a whole through the cabinet; the above design ingeniously utilizes the space position, greatly improves the integration of the relays, and greatly facilitates maintenance and repair; at the same time, the board card type design directly leads all the contacts and coil points of the relays to the first connector on one side of the adapter board, so that the wiring operation is clearer and more convenient.

[0020] The application adopts an aviation level high-reliability sealed relay, adopts a board card type structure in the aspect of integration, and the relay is also provided with a professional monitoring circuit which can realize online monitoring of the working state of the relay and various electrical parameters of the coil and the contacts, and the board card in the cabinet adopts an upper and lower layer structure. The whole system realizes the functions of high reliability, high integration, low power consumption, anti-static, easy maintenance and online monitoring and the like in the design. The application can directly replace various signal switching and low-power power supply switching in the industrial environment, and is especially suitable for use in the switching of various key signals in fields such as subways, high-speed rails and trains.

[0021] With the aid of the online monitoring means, the electrical parameters of all the used relays can be measured online without stopping the system, and the front-end circuit of the online monitoring is in a passive mode, which will not have any influence on the signals controlled by the relays in the original system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure diagram of the integrated relay system in the embodiment of the application.

[0023] Figure 2 It is a structure diagram of the relay module in the embodiment of the application.

[0024] Figure 3 It is a structure diagram of the relay contact monitoring circuit in the embodiment of the application.

[0025] Figure 4 It is a structure diagram of the relay coil monitoring circuit in the embodiment of the application.

[0026] Figure 5 It is a display diagram of the monitoring display terminal in the embodiment of the application.

[0027] Legend: 1. Chassis; 11. Card slot; 2. Relay module; 21. Adapter board; 211. Relay; 212. First connector; 22. Monitoring board; 221. Third connector; 222. Support column; 3. Main board; 4. Backplate; 401. Second connector. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1-5 As shown, the integrated relay system for rail transit in this embodiment of the invention includes a chassis 1, a main board 3, a back plate 4, and multiple relay modules 2. Each relay module 2 is inserted into the chassis 1, the back plate 4 is installed on the back of the chassis 1, each relay module 2 is electrically connected to the back plate 4, and the back plate 4 is electrically connected to the main board 3.

[0030] Each relay module 2 includes an adapter board 21 and a monitoring board 22. Multiple relays 211 (such as four four-pole double-throw relays 211) are installed on the adapter board 21. All points of each relay 211 are led to the first connector 212 at one end of the adapter board 21 through the printed circuit on the adapter board 21. The first connector 212 on the adapter board 21 is connected to the second connector 401 on the back plate 4 to realize the electrical connection between the adapter board 21 and the back plate 4.

[0031] The monitoring board 22 is used to monitor the electrical parameters of the relays 211 on the adapter board 21. The monitoring board 22 and the adapter board 21 are arranged in parallel and electrically connected through the third connector 221. The monitoring board 22 also connects to the connector on the back panel 4 (not shown in the figure) through the connector. The electrical parameters of each relay 211 on the adapter board 21 collected by the monitoring board 22 are transmitted to the back panel 4 on the back of the chassis 1, and then transmitted to the motherboard 3 through the PCB bus on the back panel 4. The motherboard 3 then collects the data and uploads it through the network port or other interfaces.

[0032] Specifically, multiple slots 11 are arranged side by side on the chassis 1, and multiple openings corresponding to the slots 11 are provided on the front of each chassis 1. The back plate 4 is installed on the back of the chassis 1, and the second connector 401 on the back plate 4 is directly opposite the slot 11. The relay module 2 is inserted from the opening and is locked in the slot 11. The first connector 212 on the adapter plate 21 is connected to the second connector 401 on the back plate 4.

[0033] The present application adopts a board card type design, installs the relay 211 on the adapter board 21, all points of the relay 211 are directly led out to the first connector 212 on one side of the adapter board 21 through the PCB printed circuit, the back of the adapter board 21 is stacked with a monitoring board 22 for monitoring the electrical parameters of the relay 211 on the adapter board 21; the relay module 2 is finally integrated into a whole through the cabinet 1, and each board card can be conveniently plugged in and out of the cabinet 1. Specifically, the relay module 2 (board card) is inserted into the cabinet 1 from the front, and the board card is fixed and positioned by the board card guide fixing groove, after the board card is inserted into position, the rear part is connected to the second connector 401 of the back plate 4 through the first connector 212, and the front part is fixed through the front fixed screw, so that the board card is fixed in the cabinet 1 in the up, down, left, right, front and rear directions.

[0034] The present application adopts a board card type structure in terms of integration, each adapter board 21 can install a plurality of (such as 4-6) relays 211, and finally the adapter board 21 is integrated into a standard 6U cabinet 1, so that all adapter boards 21 are integrated into a whole through the cabinet 1; the above design not only ingeniously utilizes the space position, but also greatly improves the integration of the relay 211, and also greatly facilitates maintenance and repair; at the same time, the board card type design directly leads all contacts and coil points of the relay 211 to the first connector 212 on one side of the adapter board 21, so that the wiring operation is more clear and convenient.

[0035] In a specific embodiment, the third connector 221 is a gold-plated connector, and each two pins are connected in parallel to correspond to the same signal, so as to ensure stable and reliable signal transmission. The adapter board 21 and the monitoring board 22 are fastened at both ends of the support column 222 through the fixing bolts, so as to ensure the mechanical connection strength.

[0036] In a specific embodiment, a monitoring display terminal is further included, which is electrically connected with the mainboard 3 and is used for monitoring and displaying the electrical parameters of the relay 211. Specifically, the mainboard 3 transmits data to the PTU software of the monitoring display terminal through Ethernet for display, and the monitoring data display interface is as shown in Figure 5 The monitoring display terminal can monitor the coil resistance, voltage and current of the relay 211, and can also monitor the contact pressure difference, current and resistance when the relay 211 is working normally. The above parameters are displayed simultaneously in the PTU interface, which is convenient for viewing, and the man-machine interface is very friendly.

[0037] In a specific embodiment, as shown in Figure 3As shown, the monitoring board 22 comprises a relay contact monitoring circuit for monitoring the contact voltage difference and the contact current to calculate the contact resistance. Specifically, the relay contact monitoring circuit comprises a resistor R1, a resistor RL1, a resistor RL2, a first operational amplifier, a second operational amplifier and a third operational amplifier, one end of the resistor R1 is connected to a DC 110V power supply, the other end is connected to the common end of the contacts, one end of the resistor RL1 and the resistor RL2 is connected to the selected end of the contacts respectively, the other end of the resistor RL1 and the resistor RL2 is grounded, the input ends of the first operational amplifier are connected to the two ends of the resistor R1 respectively; the input ends of the second operational amplifier are connected to the common end and one of the selected ends of the contacts respectively, the input ends of the third operational amplifier are connected to the common end and the other of the selected ends of the contacts respectively; the output ends of the first operational amplifier, the second operational amplifier and the third operational amplifier are connected to the input end of a first analog switch, the output end of the first analog switch is connected to the control module through a first ADC module; the first operational amplifier, the second operational amplifier and the third operational amplifier are all high common-mode voltage operational amplifiers.

[0038] Whether monitoring the relay 211 contact voltage difference or monitoring the contact current, the above-mentioned circuit can convert the difference between the two ends of the measured contact or the difference signal between the two ends of the sampling resistor R1 into a single-ended common ground signal output through a high input impedance, high common-mode, high-precision amplifier circuit, so that it can be sampled and analyzed by the ADC circuit. By monitoring the contact voltage difference and the contact current, the contact resistance can be calculated.

[0039] In order to make the relay contact monitoring circuit not affect the normal work and signal switching of the relay 211, the input end of the above-mentioned relay contact monitoring circuit is high input impedance and passive structure. The input end uses a high common-mode voltage operational amplifier circuit to collect signals, thereby ensuring that the circuit can work normally under a high common-mode voltage of up to DC 110V; the high resistance characteristic of the collection circuit itself greatly reduces the current drawn by the load circuit end (the drawn current <1mA), thereby greatly reducing the influence of the collection circuit itself on the load circuit; the high resistance characteristic of itself greatly enhances the electrical signal isolation degree between the MCU collection end and the load circuit sampling end, thereby ensuring the safe work of the MCU circuit; the high resistance and passive characteristics of the input end have little effect on the original load circuit, thereby ensuring that even if the collection circuit fails, it will not affect the normal work of the original load circuit.

[0040] In a specific embodiment, the monitoring board 22 comprises a relay coil monitoring circuit for monitoring the voltage and current of the relay 211 coil. Specifically, the relay coil monitoring circuit comprises a resistor R11, a resistor R2, a resistor R3, a fourth operational amplifier and a fifth operational amplifier, one end of the resistor R11 is connected to a DC 110V power supply, the other end of the resistor R11 is connected to one end of the coil and one end of the resistor R2, the other end of the resistor R2 is connected to ground through the resistor R3, the other end of the coil is connected to ground; the input terminals of the fourth operational amplifier and the fifth operational amplifier are connected to the two ends of the resistor R11 and the resistor R3 respectively; the output terminals of the fourth operational amplifier and the fifth operational amplifier are connected to the input terminal of the second analog switch, and the output terminal of the second analog switch is connected to the control module through the second ADC module; the fourth operational amplifier and the fifth operational amplifier are both high common-mode voltage operational amplifiers.

[0041] Specifically, the above-mentioned operational amplifier converts the R2 / (R2+R3) of the coil voltage and the voltage on the coil current sampling resistor R11 into single-ended common ground voltage output (Uo2 and Uo1), which is then collected by the ADC to calculate the coil resistance value.

[0042] The input terminal of the above-mentioned relay coil monitoring circuit uses a high common-mode voltage operational amplifier circuit to collect signals, thereby ensuring that the circuit can work normally under a high common-mode voltage of up to DC 110V or above; its high resistance characteristic greatly reduces the current drawn from the original circuit end (the drawn current is <1mA), which greatly reduces the influence of the coil current sampling circuit on the working current of the collection circuit and greatly improves the voltage collection accuracy of the coil voltage sampling circuit; the high resistance and passive characteristics of the input terminal greatly reduce the influence on the coil working loop.

[0043] The present application can measure all the electrical parameters of the relay 211 in use online without stopping the system, and the front-end circuit of the online monitoring is passive, which does not affect the signals controlled by the relay 211 in the original system.

[0044] The present application adopts an aviation-level high-reliability sealed relay 211, uses a board card structure in an integrated manner, and the professional monitoring circuit provided by the relay 211 can realize online monitoring of the working state of the relay 211 and various electrical parameters of the coil and the contact, and the board card in the case 1 adopts an upper and lower layer structure. The entire system realizes high reliability, high integration, low power consumption, anti-static, easy maintenance and online monitoring and other functional indicators in the design. The present application can directly replace various signal switching and low-power power supply switching in industrial environments, and is especially suitable for use in high-reliability occasions, such as switching of various key signals in the fields of subways, high-speed rails and trains.

[0045] The integrated relay system for rail transit has the characteristics of high integration, strong reliability, convenient maintenance, convenient wiring, online monitoring (including life prediction, risk prediction) and the like, and specifically as follows:

[0046] High integration: board card type design and case 1 installation;

[0047] Strong reliability: high-reliability relay 1 million times without failure;

[0048] Convenient maintenance: board card type design, the board card can be directly replaced during maintenance;

[0049] Convenient wiring: board card type design, relay 211 is installed on the PCB adapter plate 21, and all point positions are led out to the first connector 212 on one side;

[0050] Online monitoring: passive front-end circuit is used to realize online monitoring, the coil and contact of the relay 211 can be monitored when the relay 211 normally works, and the signal flowing through the relay 211 is not affected at all. Through analysis of the monitoring data, the life of the relay 211 can be predicted, the damage probability can be evaluated, and the replacement reminder can be sent in advance.

[0051] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments only, and any technical solution falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application should be regarded as the protection scope of the present application.

Claims

1. An integrated relay system for rail transit, characterized in that, The system includes a chassis (1), a motherboard (3), a backplate (4), and multiple relay modules (2). Each relay module (2) is inserted into the chassis (1). The backplate (4) is installed on the back of the chassis (1). Each relay module (2) is electrically connected to the backplate (4). The backplate (4) is electrically connected to the motherboard (3). Each of the relay modules (2) includes an adapter board (21) and a monitoring board (22). Multiple relays (211) are installed on the adapter board (21). All points of each relay (211) are led to the first connector (212) at one end of the adapter board (21) through the printed circuit on the adapter board (21). The first connector (212) on the adapter board (21) is connected to the second connector (41) on the back plate (4) to realize the electrical connection between the adapter board (21) and the back plate (4). The monitoring board (22) is used to monitor various electrical parameters of the relay (211) on the adapter board (21); the monitoring board (22) and the adapter board (21) are arranged in parallel and electrically connected through the third connector (221); The monitoring board (22) includes a relay contact monitoring circuit for monitoring contact pressure difference and contact current to calculate the contact resistance. The relay contact monitoring circuit includes resistors R1, RL1, and RL2, a first operational amplifier, a second operational amplifier, and a third operational amplifier. One end of resistor R1 is connected to a DC 110V power supply, and the other end contacts the common terminal of the contact. One end of resistors RL1 and RL2 is connected to the selection terminal of the contact, and the other ends of resistors RL1 and RL2 are grounded. The input terminals of the first operational amplifier are connected to both ends of resistor R1. The input terminals of the second operational amplifier are connected to the common terminal of the contact and one of the selection terminals, respectively. The input terminals of the third operational amplifier are connected to the common terminal of the contact and the other selection terminal, respectively. The output terminals of the first, second, and third operational amplifiers are connected to the input terminals of a first analog switch. The output terminal of the first analog switch is connected to the control module via a first ADC module. The first, second, and third operational amplifiers are all high common-mode voltage operational amplifiers.

2. The integrated relay system for rail transit according to claim 1, characterized in that, The third connector (221) is a gold-plated connector, with each pair of pins connected in parallel to correspond to the same signal.

3. The integrated relay system for rail transit according to claim 2, characterized in that, A support column (222) is provided between the adapter plate (21) and the monitoring plate (22), and the adapter plate (21) and the monitoring plate (22) are fastened to both ends of the support column (222) by fixing bolts.

4. The integrated relay system for rail transit according to claim 1, 2, or 3, characterized in that, The chassis (1) has multiple slots (11) arranged side by side. Each chassis (1) has multiple openings on its front corresponding to the slots (11). The back plate (4) is installed on the back of the chassis (1), and the second connector (41) on the back plate (4) is directly opposite the slot (11). The relay module (2) is inserted from the opening and is locked in the slot (11). The first connector (212) on the adapter plate (21) is connected to the second connector (41) on the back plate (4).

5. The integrated relay system for rail transit according to claim 1, 2, or 3, characterized in that, It also includes a monitoring and display terminal, which is electrically connected to the motherboard (3) and is used to monitor and display various electrical parameters of the relay (211).

6. The integrated relay system for rail transit according to claim 1, 2, or 3, characterized in that, The monitoring board (22) includes a relay coil monitoring circuit for monitoring the voltage and current of the relay (211) coil.

7. The integrated relay system for rail transit according to claim 6, characterized in that, The relay (211) coil monitoring circuit includes resistors R11, R2, and R3, a fourth operational amplifier, and a fifth operational amplifier. One end of resistor R11 is connected to a DC 110V power supply, and the other end of resistor R11 is connected to one end of the coil and one end of resistor R2. The other end of resistor R2 is grounded through resistor R3, and the other end of the coil is grounded. The input terminal of the fourth operational amplifier is connected to both ends of resistor R11, and the input terminal of the fifth operational amplifier is connected to both ends of resistor R3. The output terminals of the fourth and fifth operational amplifiers are connected to the input terminal of the second analog switch, and the output terminal of the second analog switch is connected to the control module through the second ADC module. Both the fourth and fifth operational amplifiers are high common-mode voltage operational amplifiers.

8. The integrated relay system for rail transit according to claim 1, 2, or 3, characterized in that, The number of relays (211) on the adapter plate (21) is 4-8.

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