Non-contact turnout indication direct-current voltage acquisition device

Abstract

The invention provides a non-contact turnout indication direct-current voltage acquisition device, which comprises three direct-current current sensors which are arranged on a cable between a cable terminal frame and a point switch and are respectively used for acquiring a voltage analog signal of a loop 1, a voltage analog signal of a loop 2 and a reference voltage analog signal; the turnout indication voltage acquisition machine comprises a power supply, an acquisition processor, a CAN communication and an analog input circuit, and the analog input circuit converts a voltage analog signal transmitted by a direct current sensor into a voltage signal adapted to be processed by the acquisition processor; and the acquisition processor performs AD conversion and analysis processing on the voltage signal to obtain a turnout representation voltage value and a turnout representation position, and sends out the turnout representation voltage value and the turnout representation position through the CAN communication interface.

Description

Technical Field

[0001] The invention relates to the technical field of railway signal centralized monitoring, in particular to a non-contact turnout indication DC voltage acquisition device. Background Art

[0002] The railway signal centralized monitoring system conducts real-time monitoring and intelligent analysis of railway signal equipment. The turnout indication voltage is an important indicator reflecting the status of turnout signal equipment. The railway signal centralized monitoring system needs to monitor and collect the turnout indication voltage.

[0003] In the Siemens fully electronic interlocking system, the voltage in the turnout indication circuit is a DC voltage of about 60V. However, the internal resistance of the turnout indication circuit is large and the working current is small (less than 1 mA). The existing voltage acquisition module connected to the line will cause the indication voltage to drop, affecting the operation of the indication circuit and the operation of railway signal equipment.

[0004] In order to monitor the turnout indication voltage in the Siemens fully electronic interlocking system and minimize the impact on the turnout indication circuit, it is necessary to design a non-contact turnout indication DC voltage acquisition device. Summary of the invention

[0005] In order to achieve the above object, the present invention provides a non-contact turnout DC voltage acquisition device, comprising: Three DC current sensors are installed on the cable between the cable terminal frame and the switch machine, and are used to collect loop 1 voltage analog signal, loop 2 voltage analog signal and reference voltage analog signal respectively; The switch indication voltage acquisition machine includes a power supply, an acquisition processor, CAN communication, and an analog input circuit, wherein the analog input circuit converts the voltage analog signal transmitted by the DC current sensor into a voltage signal adapted to be processed by the acquisition processor; the acquisition processor performs AD conversion and analysis processing on the voltage signal to obtain the switch indication voltage value and the switch indication position, and sends the switch indication voltage value and the switch indication position through the CAN communication interface.

[0006] Preferably, the analysis strategy of the acquisition processor is: If both the loop 1 voltage and the loop 2 voltage meet the first preset threshold condition, the loop 1 voltage and the loop 2 voltage are summed to obtain the turnout indicating voltage; If the reference voltage meets the second preset threshold condition, the switch position is determined to be the right switch position; if the reference voltage meets the third preset threshold condition, the switch position is determined to be the left switch position.

[0007] Preferably, the first preset threshold condition is: (24V, 36V); the second preset threshold condition is: less than 12V; the third preset threshold condition is: (switch indicates voltage minus 12V, switch indicates voltage plus 12V).

[0008] The beneficial effects of the present invention are: The present invention utilizes three DC current sensors installed on the cable between the cable terminal frame and the switch machine to respectively collect the voltage analog signals of the positioning indication circuit and the reverse position indication circuit and the reference voltage analog signal, and obtains the turnout indication voltage value and the turnout indication position in combination with the preset analysis strategy, thereby realizing the monitoring of the turnout indication voltage in the Siemens full electronic interlocking system; Furthermore, a through-type DC current sensor is installed on the cable of the turnout indication circuit for signal acquisition, which has almost no effect on the turnout indication circuit, thereby minimizing the impact of the voltage acquisition device on the circuit during the turnout indication voltage monitoring process in the Siemens full electronic interlocking system; The non-contact turnout indication DC voltage acquisition device meets the technical conditions of the railway signal centralized monitoring system regarding the safety requirements related to turnout indication voltage acquisition, meets the fault safety principle, and the normal operation of the signal equipment under test is not affected by the normal or faulty acquisition device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a principle block diagram of the non-contact type turnout DC voltage acquisition device of the present invention; Figure 2 It is a schematic diagram of the data processing process of the present invention; Figure 3 It is a schematic diagram of sampling positions of a ZD6 DC switch machine of the present invention; Figure 4 It is a schematic diagram of the sampling position of the S700K AC switch machine of the present invention; Figure 5 It is a schematic diagram of the sampling position of the ZDJ9 AC switch machine of the present invention. DETAILED DESCRIPTION

[0010] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0011] Example 1 This embodiment provides a non-contact turnout indication DC voltage collection device, comprising: Three DC current sensors are installed on the cable between the cable terminal frame and the switch machine, and are used to collect the voltage analog signal of loop 1, the voltage analog signal of loop 2, and the reference voltage analog signal. Specifically, loop 1 and loop 2 are different indication loops. If loop 1 is a positioning indication loop, loop 2 is a reverse position indication loop. If loop 1 is a reverse position indication loop, loop 2 is a positioning indication loop.

[0012] Specifically, the DC current sensor adopts a through-type DC current sensor, which has no electrical solid line connection with the turnout indication circuit. The through-type DC current sensor is only installed on the cable of the turnout indication circuit, which has almost no effect on the turnout indication circuit.

[0013] The switch indication voltage acquisition machine includes a power supply, an acquisition processor, CAN communication, and an analog input circuit, wherein the analog input circuit converts the voltage analog signal transmitted by the DC current sensor into a voltage signal adapted to be processed by the acquisition processor; the acquisition processor performs AD conversion and analysis processing on the voltage signal to obtain the switch indication voltage value and the switch indication position, and sends the switch indication voltage value and the switch indication position through the CAN communication interface.

[0014] Specifically, the analysis strategy of the acquisition processor is: If both the loop 1 voltage and the loop 2 voltage meet the first preset threshold condition, the loop 1 voltage and the loop 2 voltage are summed to obtain the turnout indication voltage; the first preset threshold condition is: greater than 24V and less than 36V; If the reference voltage meets the second preset threshold condition, the switch indication position is judged to be the right switch position; if the reference voltage meets the third preset threshold condition, the switch indication position is judged to be the left switch position; the second preset threshold condition is: less than 12V; the third preset threshold condition is: greater than the switch indication voltage minus 12V and less than the switch indication voltage plus 12V.

[0015] Specifically, the acquisition processor performs AD conversion and analysis processing on the voltage signal to obtain the turnout indicating voltage value and the turnout indicating position. Figure 2 As shown, the following steps are included: The analog signals collected by the three DC current sensors are respectively converted into AD to obtain three AD values, which are multiplied by preset coefficients to obtain loop 1 voltage, loop 2 voltage and reference voltage; each voltage corresponds to a preset coefficient, namely coefficient 1, coefficient 2 and coefficient 3, and the three systems are used independently and calibrated separately.

[0016] For loop 1 voltage and loop 2 voltage, determine whether they meet the first preset threshold condition respectively. If they do not meet the first preset threshold condition, an alarm is issued; if both meet the first preset threshold condition, sum the loop 1 voltage and loop 2 voltage to obtain the turnout indication voltage; For the reference voltage, determine whether it meets the second preset condition. If so, determine that the switch indicates the position is the right switch position; if so, further determine whether it meets the third preset condition. If so, determine that the switch indicates the position is the left switch position.

[0017] It should be noted that, under normal circumstances, the acquisition processor calls the data processing flow once per second to realize the regular reporting of the switch indication voltage; in order to timely and accurately reflect the sudden changes in the switch indication voltage, if the AD value output by the AD sampling pin changes by more than 20% compared with the AD value of the previous second, the data processing flow is immediately called once to realize the reporting of the change in the switch indication voltage.

[0018] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0019] Example 2 The difference between this embodiment and embodiment 1 is that: a specific embodiment of using the non-contact turnout DC voltage collection device described in embodiment 1 to sample the ZD6 DC switch machine is provided.

[0020] Figure 3 The figure shows a partial control circuit of a ZD6 DC switch machine and monitoring and acquisition equipment, in which the DC current sensor 1 is installed on line 2, the DC current sensor 2 is installed on line 1, and the DC current sensor 3 is installed on line 1 and line 4. The turnout indication voltage obtained by the turnout indication voltage acquisition machine through analysis and processing is equivalent to the voltage between line 1 and line 2 tested on the cable terminal rack.

[0021] Example 3 The embodiment of the present application also provides an embodiment for implementing the device to sample the S700K AC switch machine.

[0022] Figure 4 The figure shows a partial control circuit and monitoring and acquisition equipment of an S700K AC switch machine. The DC current sensor 1 is installed on line 1, the DC current sensor 2 is installed on line 2, and the DC current sensor 3 is installed on line 2 and line 3. The voltage obtained by the switch voltage acquisition machine through algorithm conversion is equivalent to the voltage between line 2 and line 1 tested on the cable terminal rack.

[0023] Example 4 The embodiment of the present application also provides an embodiment for implementing the device to sample the ZDJ9 AC switch machine.

[0024] Figure 5 The figure shows a partial control circuit and monitoring and acquisition equipment of a ZDJ9 AC switch machine. The installation position of DC current sensor 1 is on line 2, the installation position of DC current sensor 2 is on line 3, and the installation position of DC current sensor 3 is on line 1 and line 3. The voltage obtained by the algorithm conversion of the turnout voltage acquisition machine is equivalent to the voltage between line 3 and line 2 tested on the cable terminal rack.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A non-contact turnout DC voltage acquisition device, characterized in that: include: Three DC current sensors are installed on the cable between the cable terminal frame and the switch machine, and are used to collect loop 1 voltage analog signal, loop 2 voltage analog signal and reference voltage analog signal respectively; The switch indication voltage acquisition machine includes a power supply, an acquisition processor, CAN communication, and an analog input circuit, wherein the analog input circuit converts the voltage analog signal transmitted by the DC current sensor into a voltage signal adapted to be processed by the acquisition processor; the acquisition processor performs AD conversion and analysis processing on the voltage signal to obtain the switch indication voltage value and the switch indication position, and sends the switch indication voltage value and the switch indication position through the CAN communication interface.

2. A non-contact turnout DC voltage acquisition device according to claim 1, characterized in that: The analysis strategy of the acquisition processor is: If both the loop 1 voltage and the loop 2 voltage meet the first preset threshold condition, the loop 1 voltage and the loop 2 voltage are summed to obtain the turnout indicating voltage; If the reference voltage meets the second preset threshold condition, the switch position is determined to be the right switch position; if the reference voltage meets the third preset threshold condition, the switch position is determined to be the left switch position.

3. A non-contact turnout DC voltage acquisition device according to claim 2, characterized in that: The first preset threshold condition is: (24V, 36V); the second preset threshold condition is: less than 12V; the third preset threshold condition is: (switch indicates voltage minus 12V, switch indicates voltage plus 12V).

4. A non-contact turnout DC voltage acquisition device according to claim 2 or 3, characterized in that: The acquisition processor performs AD conversion and analysis processing on the voltage signal to obtain the turnout indicating voltage value and turnout indicating position, including the following steps: Perform AD conversion on the analog signals collected by the three DC current sensors respectively to obtain three AD values, and multiply them with preset coefficients respectively to obtain loop 1 voltage, loop 2 voltage and reference voltage; For loop 1 voltage and loop 2 voltage, determine whether they meet the first preset threshold condition respectively. If they do not meet the first preset threshold condition, an alarm is issued; if both meet the first preset threshold condition, sum the loop 1 voltage and loop 2 voltage to obtain the turnout indication voltage; For the reference voltage, determine whether it meets the second preset condition. If so, determine that the switch indicates the position is the right switch position; if so, further determine whether it meets the third preset condition. If so, determine that the switch indicates the position is the left switch position.

5. A non-contact turnout DC voltage acquisition device according to claim 2, characterized in that: When the switch indication voltage collector does not detect that the change in the AD value relative to the last sampling amount exceeds the change threshold, the data processing flow is called periodically to obtain the switch indication voltage value and the switch indication position, and upload them; when it is detected that the change in the AD value relative to the last sampling amount exceeds the change threshold, the data processing flow is temporarily called to obtain the switch indication voltage value and the switch indication position, and upload them.

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