Relay state acquisition driving equipment and relay control system comprising same

Abstract

The utility model provides a relay state acquisition driving device and a relay control system comprising the same, the device comprises a main controller, a plurality of relay state acquisition circuits and a plurality of pulse driving circuits, the relay state acquisition circuits and the pulse driving circuits are connected with the main controller, and the relay state acquisition circuits have the same circuit structure. Each pulse driving circuit comprises a diode D1, a resistor R1, a resistor R2, a voltage stabilizing diode D2, a first photoelectric coupler and a transient suppression diode T1, the circuit structures of the pulse driving circuits are the same, each pulse driving circuit comprises an optocoupler isolation circuit and a driving circuit, and the output end of the optocoupler isolation circuit is connected with the input end of the driving circuit. The relay control system comprises an upper computer and a relay combination, and further comprises the relay state acquisition driving equipment, and the relay state acquisition driving equipment is respectively in communication connection with the upper computer and the relay combination. Therefore, the utility model provides a novel acquisition driving device which is high in reliability, safe, stable and capable of meeting the principle of fault safety.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit information transmission. Specifically, it relates to a relay state acquisition and drive device and a relay control system including the device. Background Art

[0002] The safe operation of railways depends on railway communication and signal equipment. The safety relay is a very crucial basic component in railway communication and signal equipment. The train operation control such as line occupation, turnout selection, and route opening is realized through the logic circuit composed of safety relays. For example, the Chinese patent with the application number 202020527047.4 discloses a turnout control system, which includes a turnout control module, a switch machine control module, etc. The turnout control module includes a turnout relay control circuit, and the turnout relay control circuit is a safety relay AC four-wire control circuit.

[0003] It should be noted that most of the railway communication and signal equipment is installed beside the track. There are many on-site line interferences and high requirements for the stable operation of the equipment. Once the relay acquisition and drive are incorrect, it may lead to incalculable serious adverse consequences. Therefore, it is necessary to collect the status of safety relays and use the upper computer to drive the safety relays. Although the Chinese patent with the application number CN201320019335.9 discloses a system for railway inter-station information transmission, the information transmission device of this system includes a relay contact information acquisition board, a relay contact drive board, etc., but this patent does not disclose the specific circuit structures of the relay contact information acquisition board and the relay contact drive board.

[0004] It should also be noted that among the currently used equipment, some acquisition and drive devices have design defects and equipment aging problems, and new acquisition and drive devices need to be replaced in time.

[0005] In order to solve the above existing problems, people have been seeking an ideal technical solution. Summary of the Invention

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide a relay state acquisition and drive device and a relay control system including the device.

[0007] To achieve the above purpose, in the first aspect of the utility model, a relay state acquisition and drive device is provided, which includes a main controller and a plurality of relay state acquisition circuits and a plurality of pulse drive circuits connected to the main controller. Among them,

[0008] The circuit structures of several relay status acquisition circuits are the same, and each includes a diode D1, a resistor R1, a resistor R2, a zener diode D2, a first optocoupler, and a transient suppression diode T1. The positive pole of the diode D1 serves as the input end of the acquisition circuit, and the input end of the acquisition circuit is also connected to the ground terminal through the transient suppression diode T1. The negative pole of the diode D1 is connected to the negative pole of the zener diode D2 through the resistor R1. The positive pole of the zener diode D2 is connected to the first input end of the first optocoupler. The second input end of the first optocoupler is connected to the ground terminal. The first output end of the first optocoupler serves as the output end of the acquisition circuit, and the output end of the acquisition circuit is connected to the main controller. The first output end of the first optocoupler is also connected to the power supply terminal through the resistor R2, and the second output end of the first optocoupler is connected to the ground terminal.

[0009] The circuit structures of several pulse drive circuits are the same, and each includes an optocoupler isolation circuit and a drive circuit. The output end of the optocoupler isolation circuit is connected to the input end of the drive circuit, and the output end of the drive circuit is used to connect the drive coil of the corresponding relay.

[0010] To achieve the above object, the second aspect of the present invention provides a relay control system, which includes a host computer and a relay combination, and also includes the above-mentioned relay status acquisition and drive device. The relay status acquisition and drive device is respectively communicatively connected to the host computer and the relay combination.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1) The present invention proposes a relay status acquisition and drive device, which includes several relay status acquisition circuits and several pulse drive circuits. The relay status acquisition circuit uses an optocoupler, etc., to acquire the status of the corresponding safety-type relay, and the pulse drive circuit uses an optocoupler isolation circuit and a drive circuit, etc., to drive the corresponding safety-type relay to act, with high reliability, safety, and stability.

[0013] 2) The relay status acquisition and drive device is also provided with an RS232 serial communication circuit, which facilitates the communication and interconnection of the device with the host computer, etc.

[0014] 3) The relay status acquisition and drive device can also replace the acquisition and drive devices with design defects or aging, improving the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the relay status acquisition and drive device of the present invention;

[0016] Figure 2It is the circuit schematic diagram of the main controller and auxiliary circuit of the present utility model;

[0017] Figure 3 It is the circuit schematic diagram of the relay state acquisition circuit of the present utility model;

[0018] Figure 4 It is the circuit schematic diagram of the pulse drive circuit of the present utility model;

[0019] Figure 5 It is the circuit schematic diagram of the main controller and communication circuit of the present utility model;

[0020] Figure 6 It is the structural schematic diagram of the relay control system of the present utility model. Specific Embodiments

[0021] The following is a further detailed description of the technical solution of the present utility model through specific embodiments.

[0022] Terms such as "first", "second", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinguishing objects with the same attributes when describing the embodiments of the present application.

[0023] Embodiment 1

[0024] As shown in the attached Figure 1 figure, this embodiment gives a specific implementation manner of a relay state acquisition and drive device;

[0025] The relay state acquisition and drive device includes a main controller and a plurality of relay state acquisition circuits and a plurality of pulse drive circuits connected to the main controller. Among them,

[0026] As shown in the attached Figure 2As shown, the circuit structures of several relay state acquisition circuits are the same, and each includes a diode D1, a resistor R1, a resistor R2, a zener diode D2, a first optocoupler, and a transient suppression diode T1. The positive electrode of the diode D1 serves as the input end of the acquisition circuit, and the input end of the acquisition circuit is also connected to the ground terminal through the transient suppression diode T1. The negative electrode of the diode D1 is connected to the negative electrode of the zener diode D2 through the resistor R1. The positive electrode of the zener diode D2 is connected to the first input end of the first optocoupler. The second input end of the first optocoupler is connected to the ground terminal. The first output end of the first optocoupler serves as the output end of the acquisition circuit, and the output end of the acquisition circuit is connected to the main controller. The first output end of the first optocoupler is also connected to the power supply terminal through the resistor R2, and the second output end of the first optocoupler is connected to the ground terminal.

[0027] The circuit structures of several pulse drive circuits are the same, and each includes an optocoupler isolation circuit and a drive circuit. The output end of the optocoupler isolation circuit is connected to the input end of the drive circuit, and the output end of the drive circuit is used to connect the drive coil of the corresponding relay.

[0028] It should be noted that in the actual railway application environment, there is a complex electromagnetic interference environment, and the input voltage of the relay state acquisition circuit is not a standard sine wave signal. There may be spikes or instantaneous large currents. The transient suppression diode T1 used in the relay state acquisition circuit can protect the subsequent circuit from damage when it is subjected to current and voltage impacts. The relay state acquisition circuit uses an optocoupler, etc. to acquire the state of the corresponding safety relay, and the optocoupler is used to achieve electrical isolation of the acquisition.

[0029] It also should be noted that the diode D1 in the relay state acquisition circuit is used to prevent the reverse connection of the relay acquisition node from damaging the equipment during relay state acquisition. The node voltage during relay node acquisition is generally 18 - 24V, and the zener diode D2 and the current limiting resistor R1 are used to control the current flowing into the optocoupler.

[0030] In some embodiments, as shown in the appendix Figure 3 As shown, the optocoupler isolation circuit includes a second optocoupler and a resistor R3. The first input end of the second optocoupler is connected to the power supply terminal. The second input end of the second optocoupler is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the output pin of the main controller.

[0031] In some embodiments, as shown in the appendix Figure 3As shown, the drive circuit includes transistor Q1, transistor Q2, transistor Q3, transistor Q4, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R11, resistor R12, zener diode D3, zener diode D4, diode D5, diode D6, diode D7, diode D8, diode D9, diode D10, capacitor C1 and holding capacitor C2;

[0032] The base of transistor Q1 is connected to the positive electrode of zener diode D4, the negative electrode of zener diode D4 is connected to one end of resistor R6, the other end of resistor R6 is respectively connected to the opto - isolator circuit, one end of resistor R4 and one end of resistor R5, the other end of resistor R4 is connected to the negative electrode of zener diode D3, and the other end of resistor R5 is respectively connected to the power supply terminal and one end of resistor R7; the collector of transistor Q1 is respectively connected to the other end of resistor R7 and the positive electrode of diode D5, and the emitter of transistor Q1 is grounded;

[0033] The base of transistor Q2 is connected to the positive electrode of zener diode D3, the collector of transistor Q2 is respectively connected to the collector of transistor Q3, the negative electrode of diode D6, one end of resistor R9 and one end of capacitor C1; the emitter of transistor Q2 is connected to the base of transistor Q3, and the emitter of transistor Q3 is grounded;

[0034] The base of transistor Q4 is connected to the negative electrode of diode D5, the collector of transistor Q4 is connected to the power supply terminal through resistor R8, and the emitter of transistor Q4 is connected to the positive electrode of diode D6;

[0035] The other end of resistor R9 is respectively connected to the other end of capacitor C1, the positive electrode of diode D7 and the negative electrode of diode D8, the positive electrode of diode D8 is respectively connected to one end of resistor R11, one end of resistor R12, the negative electrode of diode D9 and the positive electrode of diode D10, the other end of resistor R11 is connected to one end of holding capacitor C2, the negative electrode of diode D7, the other end of holding capacitor C2, the other end of resistor R12 and the negative electrode of diode D10 are respectively connected to the ground terminal, and the positive electrode of diode D9 is used as the output terminal of the drive circuit.

[0036] It should be noted that the pulse drive circuit uses an opto - isolator circuit, etc. to drive the corresponding safety - type relay to act, with high reliability, safety and stability.

[0037] It should also be noted that as shown in the appendix Figure 4 As shown, the drive circuit uses a combination circuit of an opto - coupler, electrolytic capacitor, transistor and diode;

[0038] When the DOC_09 output at the R3 terminal is at a low level, the transistors Q1, Q2, and Q3 are simultaneously turned off. At this time, the transistor Q4 is turned on, and the current flow is +24V - resistor R8 - transistor Q4 - diode D6 - capacitor C1 - diode D7. At this time, the electrolytic capacitor C1 is charged, and the holding capacitor C2 maintains the suction of the relay.

[0039] When the DOC_09 output at the R3 terminal is at a high level, the transistors Q1, Q2, and Q3 are simultaneously turned on. At this time, the transistor Q4 is turned off, and the current flow is capacitor C1 - transistor Q3 - holding capacitor C2 - diode D8. At this time, the capacitor C1 discharges and charges the holding capacitor C2 to maintain the suction of the relay.

[0040] It should also be noted that the pulse drive circuit converts the pulse signal of high and low levels continuously sent by the single-chip microcomputer IO into a drive signal for maintaining the suction and holding of the relay; when the single-chip microcomputer fails or other circuits are disconnected, the holding capacitor C2 will quickly discharge, and after the stored charge in the holding capacitor C2 is discharged, it cannot continue to maintain the suction of the relay.

[0041] In some embodiments, as shown in the appendix Figure 3 As shown, the pulse drive circuit further includes a status display circuit. The status display circuit includes a light-emitting diode D11 and a resistor R10. The negative electrode of the light-emitting diode D11 is respectively connected to the positive electrode of the diode D8, one end of the resistor R11, one end of the resistor R12, the negative electrode of the diode D9, and the positive electrode of the diode D10. The positive electrode of the light-emitting diode D11 is connected to the ground terminal through the resistor R10.

[0042] It should be noted that when the relay is suctioned, a negative level will be generated at the cathode of the diode D9, and the anode of the light-emitting diode D11 is connected to GND, that is, 0V. At this time, the light-emitting diode D11 will be lit. Therefore, the pulse drive circuit can use the light-emitting diode to indicate the suction state of the relay, which is convenient for users to intuitively understand the state of the relay.

[0043] In some embodiments, as shown in the appendix Figure 4 As shown, the relay status acquisition and drive device further includes an RS232 serial communication circuit connected to the main controller. The RS232 serial communication circuit is used for communication connection with the upper computer.

[0044] It should be noted that the relay status acquisition and drive device 4 uses a general RS232 interface to adapt to different upper computer interfaces.

[0045] In some embodiments, as shown in the appendix Figure 1 and in the appendix Figure 5As shown, the relay status acquisition and driving device further includes a USB debugging circuit connected to the main controller, and the USB debugging circuit is connected to a USB communication circuit.

[0046] It should be noted that the USB debugging circuit is used to provide a program upgrade interface, and can also be used in conjunction with the host computer software using a USB cable to separately test whether the device is normal later.

[0047] In some embodiments, as shown in the appendix Figure 2 As shown, the relay status acquisition and driving device further includes a storage chip connected to the main controller. The models of the storage chip can be W25Q128JVSIQTR and M24C64-RMN6TP. W25Q128JVSIQTR has a capacity of 128 Mbit to store the host computer command records and the acquired relay status information.

[0048] In a specific embodiment, the relay status acquisition and driving device includes a 32-channel relay status acquisition circuit and a 12-channel pulse driving circuit. Therefore, this device can access 32 channels of acquisition and 12 channels of driving, and can access a large number of relay devices at one time.

[0049] In other embodiments, the numbers of the relay status acquisition circuit and the pulse driving circuit can be adaptively adjusted according to the model of the selected main controller and the actual requirements.

[0050] Embodiment 2

[0051] Based on Embodiment 1, this embodiment gives a specific implementation of a relay control system;

[0052] As shown in the appendix Figure 6 As shown, the relay control system includes a host computer and a relay combination (a logic circuit composed of existing safety relays), and further includes the relay status acquisition and driving device in Embodiment 1. The relay status acquisition and driving device is respectively communicatively connected to the host computer and the relay combination;

[0053] The relay status acquisition and driving device includes a main controller and a plurality of relay status acquisition circuits and a plurality of pulse driving circuits connected to the main controller.

[0054] It should be noted that the host computer sends host computer commands to the relay status acquisition and driving device through the RS232 serial communication circuit, so that the pulse driving circuit drives the corresponding safety relay; the relay status acquisition and driving device also conveys the acquired relay status information to the host computer through the RS232 serial communication circuit.

[0055] Specifically, the main controller can adopt the STM32F103VET6 single-chip microcomputer or other devices that can implement the above functions.

[0056] It should be noted that the relay control system can be used for relay acquisition and driving in systems such as railway disaster monitoring systems, turnout control systems, and communication signal systems. At the same time, it can be used to replace the acquisition and driving equipment with design defects or aging, and can also be used in environments such as daily circuit verification, personnel training, and fault emergency handling.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still modifications can be made to the specific implementation manners of the present invention or equivalent replacements can be made to some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A relay state acquisition and drive device, characterized in that: It includes a main controller and several relay state acquisition circuits and several pulse drive circuits connected to the main controller. Among them, the circuit structures of the several relay state acquisition circuits are the same, and each includes a diode D1, a resistor R1, a resistor R2, a zener diode D2, a first optocoupler, and a transient suppression diode T1. The positive electrode of the diode D1 serves as the input end of the acquisition circuit, and the input end of the acquisition circuit is also connected to the ground terminal through the transient suppression diode T1. The negative electrode of the diode D1 is connected to the negative electrode of the zener diode D2 through the resistor R1. The positive electrode of the zener diode D2 is connected to the first input end of the first optocoupler. The second input end of the first optocoupler is connected to the ground terminal. The first output end of the first optocoupler serves as the output end of the acquisition circuit, and the output end of the acquisition circuit is connected to the main controller. The first output end of the first optocoupler is also connected to the power supply terminal through the resistor R2, and the second output end of the first optocoupler is connected to the ground terminal. The circuit structures of the several pulse drive circuits are the same, and each includes an optocoupler isolation circuit and a drive circuit. The output end of the optocoupler isolation circuit is connected to the input end of the drive circuit, and the output end of the drive circuit is used to connect the drive coil of the corresponding relay.

2. The relay state acquisition and drive device according to claim 1, wherein: The optocoupler isolation circuit includes a second optocoupler and a resistor R3. The first input end of the second optocoupler is connected to the power supply terminal, the second input end of the second optocoupler is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the output pin of the main controller.

3. The relay state acquisition and driving device according to claim 1, characterized in that: The drive circuit includes a triode Q1, a triode Q2, a triode Q3, a triode Q4, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R11, a resistor R12, a zener diode D3, a zener diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, a diode D10, a capacitor C1, and a holding capacitor C2. The base of the triode Q1 is connected to the positive electrode of the zener diode D4. The negative electrode of the zener diode D4 is connected to one end of the resistor R6. The other end of the resistor R6 is respectively connected to the optocoupler isolation circuit, one end of the resistor R4, and one end of the resistor R5. The other end of the resistor R4 is connected to the negative electrode of the zener diode D3. The other end of the resistor R5 is respectively connected to the power supply terminal and one end of the resistor R7. The collector of the triode Q1 is respectively connected to the other end of the resistor R7 and the positive electrode of the diode D5. The emitter of the triode Q1 is grounded. The base of the triode Q2 is connected to the positive electrode of the zener diode D3. The collector of the triode Q2 is respectively connected to the collector of the triode Q3, the negative electrode of the diode D6, one end of the resistor R9, and one end of the capacitor C1. The emitter of the triode Q2 is connected to the base of the triode Q3. The emitter of the triode Q3 is grounded. The base of the triode Q4 is connected to the negative electrode of the diode D5. The collector of the triode Q4 is connected to the power supply terminal through the resistor R8. The emitter of the triode Q4 is connected to the positive electrode of the diode D6. The other end of the resistor R9 is respectively connected to the other end of the capacitor C1, the positive electrode of the diode D7, and the negative electrode of the diode D8. The positive electrode of the diode D8 is respectively connected to one end of the resistor R11, one end of the resistor R12, the negative electrode of the diode D9, and the positive electrode of the diode D10. The other end of the resistor R11 is connected to one end of the holding capacitor C2. The negative electrode of the diode D7, the other end of the holding capacitor C2, the other end of the resistor R12, and the negative electrode of the diode D10 are respectively connected to the ground terminal. The positive electrode of the diode D9 serves as the output terminal of the drive circuit.

4. The relay state acquisition and driving device according to claim 3, wherein: The pulse drive circuit further includes a status display circuit. The status display circuit includes a light-emitting diode D11 and a resistor R10. The negative electrode of the light-emitting diode D11 is respectively connected to the positive electrode of the diode D8, one end of the resistor R11, one end of the resistor R12, the negative electrode of the diode D9, and the positive electrode of the diode D10. The positive electrode of the light-emitting diode D11 is connected to the ground terminal through the resistor R10.

5. The relay state acquisition and driving device according to any one of claims 1 to 4, characterized in that: It further includes an RS232 serial communication circuit connected to the main controller. The RS232 serial communication circuit is used for communication connection with the upper computer.

6. The relay state acquisition and drive device according to claim 5, characterized in that: It further includes a storage chip connected to the main controller.

7. The relay state acquisition and driving device according to claim 5, characterized in that: It further includes a USB debugging circuit connected to the main controller.

8. A relay control system, comprising a host computer and a relay combination, characterized in that: It further includes the relay status acquisition and drive device according to any one of claims 1 to 7. The relay status acquisition and drive device is respectively in communication connection with the upper computer and the relay combination.

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