Analog circuit of switch machine

Abstract

The utility model discloses an analog circuit of a point switch. The analog circuit comprises a loop resistor R1, a loop resistor R2, a sampling resistor R3, a sampling resistor R4, a first one-way conduction device, a second one-way conduction device, a first optical coupler, a second optical coupler and a signal acquisition unit, wherein one end of the loop resistor R1 is connected with the binding post X2, the other end of the loop resistor R1 is connected with the positive electrode of the first one-way conduction device, and the negative electrode of the first one-way conduction device is connected with the binding post X1 and the positive electrode of the second one-way conduction device; one end of the loop resistor R2 is connected with the binding post X3, the other end of the loop resistor R2 is connected with the negative electrode of the first one-way conduction device, and the positive electrode of the second one-way conduction device is connected with the binding post X4 and the binding post X5. The circuit can simulate the work of the switch machine, accurately represents the positioning and reverse position states, has the characteristics of convenience in operation and high stability, and can be used for the training, testing, fault diagnosis and other work of a railway signal system.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rail transit, more particularly, relate to a simulation circuit of switch machine. BACKGROUND

[0002] In the railway signal system, the switch machine occupies the pivotal position, and its main role is to convert the turnout position, so as to ensure that the train can safely run on the correct track. The identification and processing of switch machine circuit failure are the key points of railway worker training. However, in the actual training and testing process, there are many drawbacks in directly using the real switch machine, such as high cost, high risk and inconvenient operation. With the continuous progress of science and technology in the electronic field, many emerging technologies have been gradually applied in rail vocational education and training. In view of this, there is an urgent need for a circuit system that can simulate the work of the switch machine, so as to facilitate training, testing and fault diagnosis.

[0003] At present, the existing switch machine circuit equipment has the defects of complex structure, large size, low simulation accuracy, single function, poor stability and difficulty in fault reproduction when applied in practical training, which cannot fully meet the actual needs. CONTENT OF THE UTILITY MODEL

[0004] The utility model embodiment provides a simulation circuit of switch machine, the circuit is connected with switch machine control circuit through 5 binding posts X1, X2, X3, X4 and X5, the circuit includes loop resistance R1, loop resistance R2, sampling resistance R3, sampling resistance R4, first unidirectional conducting device, second unidirectional conducting device, first optical coupler, second optical coupler and signal acquisition unit, wherein:

[0005] One end of the loop resistance R1 is connected with the binding post X2, the other end is connected with the positive pole of the first unidirectional conducting device, wherein the negative pole of the first unidirectional conducting device is connected with the binding post X1 and the positive pole of the second unidirectional conducting device respectively;

[0006] One end of the loop resistance R2 is connected with the binding post X3, the other end is connected with the negative pole of the first unidirectional conducting device, wherein the positive pole of the second unidirectional conducting device is connected with the binding post X4 and the binding post X5 respectively;

[0007] One input end of the first optical coupler is connected to the position D11 between the binding post X2 and the loop resistance R1 through the sampling resistance R3, the other input end is connected to the position D12 between the loop resistance R1 and the positive pole of the first unidirectional conducting device, one output end is connected with one input end of the signal sampling unit, and the other output end is grounded;

[0008] One input end of the second optical coupler is connected to a position D21 between the terminal X3 and the loop resistance R2 through a sampling resistance R2, the other input end is connected to a position D22 between the loop resistance R2 and the negative pole of the second unidirectional conducting device, one output end is connected to the other input end of the signal sampling unit, and the other output end is grounded.

[0009] The signal sampling unit is used for sampling signals output by the first optical coupler and the second optical coupler.

[0010] The circuit provided by the embodiment of the application can simulate the operation of the switch machine, accurately represent the fixed reverse position state, and collect state information representing the operation by using the first optical coupler and the second optical coupler, and has the characteristics of convenient operation and high stability, and can be used for training, testing and fault diagnosis of a railway signal system.

[0011] Other features and advantages of the present application will be described in the subsequent description, and some of them will become apparent from the description, or will be understood by implementing the present application. The purpose and other advantages of the present application can be achieved and obtained by the structure specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the technical scheme of the present application, and constitute a part of the description, and are used to explain the technical scheme of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical scheme of the present application.

[0013] Figure 1 The structure schematic diagram of the simulation circuit of the switch machine provided by the embodiment of the application is shown in the figure.

[0014] Figure 2 The structure schematic diagram of the simulation circuit of the switch machine provided by the embodiment of the application is shown in the figure. Figure 1 The structure schematic diagram of the simulation circuit of the switch machine provided by the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other at will.

[0016] The purpose of the present application is to provide a switch machine simulation circuit device, which can not only accurately simulate the operation of the switch machine and accurately represent the fixed reverse position state, but also can set a broken wire fault, has the characteristics of complete functions, convenient operation and high stability, and can be used for training, testing and fault diagnosis of a railway signal system.

[0017] Figure 1The structure schematic diagram of the simulation circuit of the switch machine is provided for the embodiment of the present application. As shown in the figure, the circuit is connected with the switch machine control circuit through five terminals X1, X2, X3, X4 and X5, and the circuit comprises a loop resistance R1, a loop resistance R2, a sampling resistance R3, a sampling resistance R4, a first unidirectional conducting device, a second unidirectional conducting device, a first optical coupler, a second optical coupler and a signal sampling unit; wherein: Figure 1 One end of the loop resistance R1 is connected with the terminal X2, and the other end is connected with the positive pole of the first unidirectional conducting device, wherein the negative pole of the first unidirectional conducting device is connected with the terminal X1 and the positive pole of the second unidirectional conducting device respectively;

[0018] One end of the loop resistance R2 is connected with the terminal X3, and the other end is connected with the negative pole of the first unidirectional conducting device, wherein the positive pole of the second unidirectional conducting device is connected with the terminal X4 and the terminal X5 respectively;

[0019] One input end of the first optical coupler is connected to a position D11 between the terminal X2 and the loop resistance R1 through the sampling resistance R3, the other input end is connected to a position D12 between the loop resistance R1 and the positive pole of the first unidirectional conducting device, one output end is connected with one input end of the signal sampling unit, and the other output end is grounded;

[0020] One input end of the second optical coupler is connected to a position D21 between the terminal X3 and the loop resistance R2 through the sampling resistance R2, the other input end is connected to a position D22 between the loop resistance R2 and the negative pole of the second unidirectional conducting device, one output end is connected with the other input end of the signal sampling unit, and the other output end is grounded;

[0021] The signal sampling unit is used for sampling the signals output by the first optical coupler and the second optical coupler.

[0022] In the structure shown in the figure, the resistance values of the loop resistances R1, R2 and the sampling resistances R3, R4 are all 300Ω, and the rated power consumptions are all 1W.

[0023] Figure 1 In the structure shown in the figure, the resistance values of the loop resistances R1, R2 and the sampling resistances R3, R4 are all 300Ω, and the rated power consumptions are all 1W.

[0024] In the structure shown in the figure, the resistance values of the loop resistances R1, R2 and the sampling resistances R3, R4 are all 300Ω, and the rated power consumptions are all 1W. Figure 1 ​In the structure shown, when the switch performs positioning indication, the terminals X1, X3, and X5 are turned on, and there is voltage across the loop resistor R2. The signal acquisition unit can detect the voltage signal from the output end of the second optocoupler, determine that the second optocoupler is turned on, and the signal acquisition unit outputs the collected signal as indication information of successful positioning indication; similarly, when the switch performs reverse position indication, the terminals X1, X2, and X4 are turned on, and there is voltage across the loop resistor R1. The signal acquisition unit can detect the voltage signal from the output end of the first optocoupler, and the signal acquisition unit outputs the collected signal as indication information of successful reverse position indication.

[0025] As can be seen from the above content, the circuit provided in the embodiment of the present application can simulate the operation of a switch machine, accurately indicate the fixed and reverse position states, utilize the first optocoupler and the second optocoupler to collect status information indicating the operation, and has the characteristics of easy operation and high stability, and can be used for training, testing and fault diagnosis of railway signal systems.

[0026] Furthermore, at least one of the first optical coupler and the second optical coupler is an AC optical coupler.

[0027] When the switch machine performs positioning indication, the terminals X1, X3, and X5 are turned on, and there is voltage across the loop resistor R2. If the signal collected by the signal acquisition unit is a half-cycle conductive signal, it indicates that the second unidirectional conductive device is working normally; if the signal collected by the signal acquisition unit is a full-cycle conductive signal, it indicates that the second unidirectional conductive device is faulty.

[0028] By the same token, when the switch machine performs reverse position indication, the terminals X1, X2, and X4 are turned on, and there is voltage across the loop resistor R1. If the waveform of the voltage signal collected by the signal acquisition unit is a half-cycle conduction waveform, it indicates that the first unidirectional conductive device is working normally; if the waveform of the voltage signal collected by the signal acquisition unit is a full-cycle conduction waveform, it indicates that the first unidirectional conductive device is faulty.

[0029] The use of AC optocouplers in the circuit can not only obtain the indication status, but also detect whether the unidirectional conducting devices in the circuit are working normally.

[0030] Figure 2 for Figure 1 Another structural diagram of the road shown in FIG. Figure 2 As shown, the first optical coupler in the circuit is an AC optical coupler U1, and the second optical coupler is an AC optical coupler U2, wherein the models of the AC couplers U1 and U2 are TD814A.

[0031] Furthermore, at least one of the first unidirectional conducting device and the second unidirectional conducting device is a diode.

[0032] With reference to Figure 2 , the first unidirectional conducting device in the circuit is diode D1, and the second unidirectional conducting device is diode D2, wherein the model of diode D1 and D2 is 10A10.

[0033] Optionally, the circuit further comprises at least one of a first voltage control unit and a second voltage control unit, wherein:

[0034] The first voltage control unit is connected at one end between the sampling resistor R3 and the position D11, and at the other end between the optocoupler unit and the position D12, for controlling the voltage flowing through the first optocoupler within the voltage range supported by the first optocoupler.

[0035] The second voltage control unit is connected at one end between the sampling resistor R4 and the position D21, and at the other end between the second optocoupler and the position D22, for controlling the voltage flowing through the second optocoupler within the voltage range supported by the second optocoupler.

[0036] By setting the first voltage control unit and the second voltage control unit, the voltage at the input end of the optocoupler can be effectively controlled within a reasonable range, avoiding the first optocoupler and the second optocoupler from being burned out due to excessive voltage,

[0037] With reference to Figure 2 , the first voltage control unit in the circuit is transient voltage suppression diode TVS1, and the second voltage control unit is transient voltage suppression diode TVS2, wherein the model of transient voltage suppression diode TVS1 and TVS2 is SMBJ15CA.

[0038] In the transient voltage suppression diode, K and A represent the cathode (Cathode) and the anode (Anode) respectively.

[0039] In the embodiments of the present application, the cathode K of the transient voltage suppression diode TVS1 is connected between the sampling resistor R3 and the position D11, and the anode A is connected between the AC optocoupler U1 and the position D12; the cathode K of the transient voltage suppression diode TVS2 is connected between the sampling resistor R4 and the position D21, and the anode A is connected between the AC optocoupler unit U2 and the position D22.

[0040] Optionally, the circuit further comprises:

[0041] at least one of self-resetting fuse F1, self-resetting fuse F2 and self-resetting fuse F3; wherein:

[0042] One end of the self-resetting fuse F1 is connected with the terminal X1, and the other end is connected with the negative electrode of the first unidirectional conducting device;

[0043] One end of the self-resetting fuse F2 is connected with the terminal X4, and the other end is connected with the positive pole of the second unidirectional conducting device;

[0044] One end of the self-resetting fuse F3 is connected with the terminal X5, and the other end is connected with the positive pole of the second unidirectional conducting device.

[0045] ‌Wherein, the self-resetting fuse is an overcurrent electronic protection element, which has overcurrent and overheat protection functions and can be automatically restored. It is different from the traditional fuse which needs to be replaced after overcurrent, while the self-resetting fuse can be automatically restored after the current returns to normal, repeatedly used and does not need to be replaced.

[0046] By setting the self-resetting fuse in the circuit, the circuit can be effectively prevented from being burned out. Since the loop circuit is arranged in the terminals X2 and X3, the self-resetting fuse does not need to be arranged on the terminals X2 and X3, so as to effectively control the hardware cost of the circuit.

[0047] Optionally, the circuit further comprises:

[0048] The switch unit K1, the switch unit K2, the switch unit K3, the switch unit K4 and the switch unit K5; wherein:

[0049] One end of the switch unit K1 is connected with the terminal X1, and the other end is connected with the negative pole of the first unidirectional conducting device;

[0050] One end of the switch unit K2 is connected with the terminal X2, and the other end is connected with the loop resistance R1;

[0051] One end of the switch unit K3 is connected with the terminal X3, and the other end is connected with the loop resistance R2;

[0052] One end of the switch unit K4 is connected with the terminal X4, and the other end is connected with the positive pole of the second unidirectional conducting device;

[0053] One end of the switch unit K5 is connected with the terminal X5, and the other end is connected with the negative pole of the second unidirectional conducting device.

[0054] The five switch units simulate the broken wire fault of different lines in the circuit, further perfect the simulation function of the circuit, have the characteristics of convenient operation and high stability, and can be used for training, testing and fault diagnosis of the railway signal system.

[0055] Further, at least one of the switch unit K1, the switch unit K2, the switch unit K3, the switch unit K4 and the switch unit K5 is a relay.

[0056] For example, the model of the relay is SRD-24VDC-SL-C.

[0057] With reference to the foregoing description Figure 2 , one end of the self-restoring fuse F1 is connected with the terminal X1 through the switch unit K1, and the other end is connected with the negative electrode of the diode D1; one end of the self-restoring fuse F2 is connected with the terminal X4 through the switch unit K4, and the other end is connected with the positive electrode of the diode D2; one end of the self-restoring fuse F3 is connected with the terminal X5 through the switch unit K5, and the other end is connected with the positive electrode of the diode D2. In addition, one end of the switch unit K2 is connected with the terminal X2, and the other end is connected with the loop resistance R1; one end of the switch unit K3 is connected with the terminal X3, and the other end is connected with the loop resistance R2; one end of the switch unit K2 is connected with the terminal X2, and the other end is connected with the loop resistance R1; one end of the switch unit K3 is connected with the terminal X3, and the other end is connected with the loop resistance R2.

[0058] The model of the self-restoring fuse F1, F2 and F3 is JK250-110U.

[0059] Optionally, the circuit further comprises:

[0060] The switch control unit is connected with the five switch units K1, K2, K3, K4 and K5, and is used for controlling the power supply state of the five switch units K1, K2, K3, K4 and K5.

[0061] With reference to the foregoing description Figure 2 , the switch control unit drives the on-off state of the five switch units by receiving the fault setting information, so as to realize the simulation of the fault state.

[0062] Further, the switch control unit and the signal acquisition unit are integrated on the same single-chip microcomputer, so as to realize the miniaturization of the circuit.

[0063] Optionally, the single-chip microcomputer can be connected with a control device, and the control device can process and display the signal information output by the signal acquisition unit, or output the fault setting information to the switch control unit.

[0064] In summary, the circuit provided by the embodiment of the present application has the following advantages, including:

[0065] The working state of the switch machine can be accurately simulated, and an effective means is provided for the training, testing and fault diagnosis of the railway signal system;

[0066] The circuit has the characteristics of complete functions, convenient operation and high stability, and can meet the needs of different users;

[0067] Compared with the real switch machine, the utility model has the advantages of low cost, small risk, and is convenient for popularization and application;

[0068] Using the AC optical coupler, not only the circuit state can be collected, but also whether the line is normal can be judged.

[0069] Therefore, the circuit provided by the embodiment of the application can realize fault judgment by using the switching control unit to set the on-off of the line in the circuit and using the signal collection unit to detect the voltage waveform output by the first optical coupler and the second optical coupler, realize the function of the switch machine and common fault setting, integrate the fault setting, positive and negative position indication, and fault detection function in the same circuit, greatly simplify the complexity of the structure, and have the advantages of small size, rich function, low cost, and the like.

[0070] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "one side", "another side", "one end", "another end", "edge", "opposite", "four corners", "periphery", "mouth" structure" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the structure indicated has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0071] In the description of the utility model embodiment, unless otherwise explicitly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected; the terms "installation", "connection", "fixed connection" can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0072] Although the embodiments disclosed by the utility model are as above, the content described is only the embodiment adopted for the convenience of understanding the utility model, and is not used to limit the utility model. Any person skilled in the art of the utility model can make any modification and change in the implementation form and details without departing from the spirit and scope of the utility model disclosed, but the patent protection scope of the utility model still needs to be defined by the appended claims.

Claims

1. An analog circuit for a switch machine, characterized in that: The circuit is connected to the switch machine control circuit via five terminals X1, X2, X3, X4, and X5. The circuit includes a loop resistor R1, a loop resistor R2, a sampling resistor R3, a sampling resistor R4, a first unidirectional conductive device, a second unidirectional conductive device, a first optical coupler, a second optical coupler, and a signal acquisition unit. One end of the loop resistor R1 is connected to the terminal X2, and the other end is connected to the positive electrode of the first unidirectional conductive device, wherein the negative electrode of the first unidirectional conductive device is connected to the terminal X1 and the positive electrode of the second unidirectional conductive device respectively; One end of the loop resistor R2 is connected to the terminal X3, and the other end is connected to the negative electrode of the first unidirectional conductive device, wherein the positive electrode of the second unidirectional conductive device is connected to the terminal X4 and the terminal X5 respectively; One input end of the first optical coupler is connected to a position D11 between the terminal X2 and the loop resistor R1 through the sampling resistor R3, the other input end is connected to a position D12 between the loop resistor R1 and the positive electrode of the first unidirectional conductive device, one output end is connected to an input end of the signal acquisition unit, and the other output end is grounded; One input end of the second optical coupler is connected to a position D21 between the terminal X3 and the loop resistor R2 through a sampling resistor R2, the other input end is connected to a position D22 between the loop resistor R2 and the negative electrode of the second unidirectional conductive device, one output end is connected to another input end of the signal acquisition unit, and the other output end is grounded; The signal acquisition unit is used to acquire signals output by the first optical coupler and the second optical coupler.

2. The circuit according to claim 1, wherein: The circuit further comprises at least one of a first voltage control unit and a second voltage control unit, wherein: The first voltage control unit has one end connected between the sampling resistor R3 and the position D11, and the other end connected between the optical coupler unit and the position D12, and is used to control the voltage flowing through the first optical coupler to be within the voltage range supported by the first optical coupler; The second voltage control unit has one end connected between the sampling resistor R4 and the position D21 and the other end connected between the second optocoupler and the position D22, and is used to control the voltage flowing through the second optocoupler to be within the voltage range supported by the second optocoupler.

3. The circuit according to claim 2, wherein: At least one of the first voltage control unit and the second voltage control unit is a transient voltage suppressor diode.

4. The circuit according to claim 1, wherein: At least one of the first optical coupler and the second optical coupler is an AC optical coupler.

5. The circuit according to claim 1, wherein: At least one of the first unidirectional conducting device and the second unidirectional conducting device is a diode.

6. The circuit according to claim 1, wherein: The circuit further comprises: At least one of the resettable fuse F1, the resettable fuse F2 and the resettable fuse F3; wherein: One end of the resettable fuse F1 is connected to the terminal X1, and the other end is connected to the negative electrode of the first unidirectional conducting device; One end of the resettable fuse F2 is connected to the terminal X4, and the other end is connected to the positive electrode of the second unidirectional conducting device; One end of the resettable fuse F3 is connected to the terminal X5, and the other end is connected to the positive electrode of the second unidirectional conducting device.

7. The circuit according to any one of claims 1 to 6, characterized in that The circuit further comprises: Switch unit K1, switch unit K2, switch unit K3, switch unit K4 and switch unit K5; wherein: One end of the switch unit K1 is connected to the terminal X1, and the other end is connected to the negative electrode of the first unidirectional conductive device; One end of the switch unit K2 is connected to the terminal X2, and the other end is connected to the loop resistor R1; One end of the switch unit K3 is connected to the terminal X3, and the other end is connected to the loop resistor R2; One end of the switch unit K4 is connected to the terminal X4, and the other end is connected to the positive electrode of the second unidirectional conductive device; One end of the switch unit K5 is connected to the terminal X5, and the other end is connected to the negative electrode of the second unidirectional conducting device.

8. The circuit according to claim 7, characterized in that At least one of the switch unit K1 , the switch unit K2 , the switch unit K3 , the switch unit K4 , and the switch unit K5 is a relay.

9. The circuit according to claim 7, characterized in that The circuit further comprises: The switch control unit is connected to the five switch units K1, K2, K3, K4 and K5, and is used to control the power supply status of the five switch units K1, K2, K3, K4 and K5.

10. The circuit according to claim 9, characterized in that: The switch control unit and the signal acquisition unit are integrated on the same single chip computer.

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