Continuous signal generation apparatus for train-passage track circuit, and method

Abstract

The present invention relates to a continuous signal generation apparatus for a train-passage track circuit, and a method. The apparatus comprises a controller, a signal generator and a power amplifier output circuit, and further comprises a track signal switching circuit, a plurality of first relays and a plurality of second relays; the track signal switching circuit comprises at least one first decoder, at least one second decoder, at least one first inverter, at least one second inverter and at least one driver; each driver comprises a plurality of branches, the number of branches of the driver being greater than or equal to the sum of the number of the first relays and the second relays. Compared with the prior art, the present invention can provide simulation signal control for multiple sections so as to enable continuous signal simulation, and can generate track circuit signals for a single section being repeatedly run over or for trains continuously passing through multiple sections, thus improving the test coverage and the test efficiency.

Description

A device and method for continuously generating a vehicle track circuit signal Technical Field

[0001] The present invention relates to the field of railway communications, and in particular to a device and method for continuously generating a passing track circuit signal. Background Art

[0002] In recent years, with the rapid development of the information industry, various industries have increasingly stringent requirements for signal safety equipment. As a section track circuit safety product, the ZPW-2000 non-insulated frequency-shift automatic block is always under scrutiny for its operating status. The LKMG2-TH ZPW-2000 section track circuit outdoor monitoring system meets market demand.

[0003] During the testing of the track circuit outdoor monitoring system, it is necessary to simulate various track circuit signals. Among them, the simulation of the rail track circuit current signal when a train passes is a key part. In the existing technology, this signal is usually achieved by using a signal generator combined with a power amplifier. However, this solution can only simulate single-point signals and cannot simulate continuous signals. For example, it cannot simulate the track circuit signal of a train repeatedly running over the rails in a certain section, or continuously passing through multiple sections of rails.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for continuously generating a track circuit signal for a vehicle passing track.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A device for continuously generating a track circuit signal for a passing vehicle, comprising: a controller, a signal generator, and a power amplifier output circuit, and also comprising a track signal switching circuit, a plurality of first relays, and a plurality of second relays;

[0008] The track signal switching circuit includes at least one first decoder, at least one second decoder, at least one first inverter, at least one second inverter, at least one and at least one driver, wherein the driver includes multiple branches, and the number of branches of the driver is greater than or equal to the sum of the number of the first relay and the second relay.

[0009] The signal input terminal of the first decoder is connected to the first group of first signal output terminals of the controller, the enable terminal is connected to the second signal output terminal of the controller, and different first decoders are respectively connected to different second signal output terminals of the controller.

[0010] The signal input terminal of the second decoder is connected to the second group of first signal output terminals of the controller, the enable terminal is connected to the third signal output terminal of the controller, and different second decoders are respectively connected to different third signal output terminals of the controller.

[0011] The signal output terminals of the first decoder are respectively connected to different input terminals of the first inverter, and the signal output terminals of the second decoder are respectively connected to different input terminals of the second inverter. Each effective output terminal of the first inverter is respectively connected to the coil of each first relay via a branch of the driver, and each effective output terminal of the second inverter is respectively connected to the coil of each second relay via a branch of the driver. The input terminals and output terminals of the inverters are paired one-to-one. If the input terminal paired with any output terminal is connected to the decoder signal output terminal, then the output terminal is the effective output terminal.

[0012] There are two power amplifier output circuits in total. One output of the signal generator is connected to the contacts of all the first relays through one power amplifier output circuit, and the other output is connected to the contacts of all the second relays through the other power amplifier output circuit.

[0013] The difference between the number of the first relays and the number of the second relays is 1 at most.

[0014] Among all the second signal output terminals of the controller, at most one of them outputs an enable signal at the same time.

[0015] Among all the third signal output terminals of the controller, at most one of them outputs an enable signal at the same time.

[0016] The first decoder is configured to: when receiving an enable signal, select a signal output terminal to be turned on based on the signal received at its signal input terminal;

[0017] The second decoder is configured to: when receiving an enable signal, select a signal output terminal to be turned on based on the signal received at its signal input terminal.

[0018] The signal generator includes a signal generating chip and at least two filtering circuits, wherein the input end of the signal generating chip is connected to the control, a group of output ends is connected to one of the power amplifier output circuits via a filtering circuit, and another group of output ends is connected to another power amplifier output circuit via another filtering circuit.

[0019] The filtering circuit is a three-stage LC filtering circuit.

[0020] The power amplifier output circuit includes a power amplifier tube.

[0021] The controller is connected to the host computer via a USB port.

[0022] The relationship between the number of signal input terminals and the number of signal output terminals of the first decoder is: A≤2 B

[0023] Where: A is the number of signal output terminals, and B is the number of signal input terminals.

[0024] A method based on the above device includes:

[0025] Step S1: Acquire signal simulation configuration information, and generate a conduction control signal and a simulation signal corresponding to each segment according to the configuration information;

[0026] Step S2: Based on the correspondence between each first relay and each second relay and each segment, combined with the obtained conduction control signal and analog signal of each segment, a control signal sequence and an enable signal sequence acting on each first decoder and second decoder, as well as a control signal sequence acting on the signal generator are generated, wherein each first relay corresponds to each odd segment, and each second relay corresponds to each even segment.

[0027] Step S3: Controlling the operation of the track signal switching circuit and the signal generator based on the generated control signal sequence and the enable signal sequence.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By designing a track signal switching circuit, multiple first relays and multiple second relays, and implementing the track signal switching circuit based on a decoder, a commutator and a driver, analog signal control of multiple sections can be provided, thereby realizing continuous signal simulation, and realizing track circuit signals of repeatedly running over a section or trains continuously passing through multiple sections, thereby improving the scope of test coverage and test efficiency.

[0030] 2. The maximum difference between the number of the first relay and the number of the second relay is 1, which can reduce costs.

[0031] 3. Among all the second signal output terminals of the controller, at most one of them outputs an enable signal at the same time, which can increase the number of supported segments.

[0032] 4. It can automatically calculate the train occupancy time based on the train and section information, with a high degree of intelligence. The production of train occupancy timetable is conducive to the use of monitoring equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic structural diagram of an application scenario of the present invention;

[0034] FIG2 is a schematic diagram of the use logic of the present invention;

[0035] FIG3 is a schematic structural diagram of the present invention;

[0036] FIG4 is a circuit diagram of a track signal switching circuit;

[0037] FIG5 is a schematic diagram showing the wiring principle of the signal generating chip;

[0038] FIG6 is a schematic diagram of a filter circuit;

[0039] FIG7 is a schematic diagram of other peripheral circuits of the signal generator;

[0040] FIG8 is a schematic diagram of signals of a controller for a signal generator;

[0041] FIG9 is a circuit diagram of a power amplifier output circuit;

[0042] Among them: 1. Host computer, 2. USB port, 3. Signal continuous generating device, 4. Current loop, 31. Controller, 32. Signal generator, 33. Power amplifier output circuit, 34. Track signal switching circuit, 35. Relay group. DETAILED DESCRIPTION

[0043] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0044] A continuous track circuit signal generator for a passing train is applied to the system shown in FIG1 . The working principle is shown in FIG2 . The host computer 1 sends configuration information (including the occupied section number, section occupation time, waiting time, repeated occupation times, track circuit signal, etc.) to the continuous signal generator via the USB port 2 , and receives the train occupation track section timetable sent by the passing train simulation device.

[0045] Then the signal continuous generating device 3 can simulate multiple logical sections and can simulate two different track circuit signals at the same time. The signal continuous generating device 3 receives instructions from the host computer 1 through the USB port 2, completes the setting of the track circuit signal according to the instruction requirements, simulates track occupation and clearing, and uploads the track occupation timetable;

[0046] As shown in FIG3 , the signal continuous generating device includes: a controller 31 , a signal generator 32 , and a power amplifier output circuit 33 , and also includes a track signal switching circuit 34 , and a plurality of first relays and a plurality of second relays;

[0047] As shown in FIG4 , the track signal switching circuit 34 includes at least one first decoder, at least one second decoder, at least one first inverter, at least one second inverter, at least one and at least one driver. The driver includes multiple branches, and the number of branches of the driver is greater than or equal to the sum of the number of the first relay and the second relay.

[0048] The signal input terminal of the first decoder is connected to the first group of first signal output terminals of the controller 31, the enable terminal is connected to the second signal output terminal of the controller 31, and different first decoders are respectively connected to different second signal output terminals of the controller 31.

[0049] The signal input terminal of the second decoder is connected to the second group of first signal output terminals of the controller 31, the enable terminal is connected to the third signal output terminal of the controller 31, and different second decoders are respectively connected to different third signal output terminals of the controller 31.

[0050] The signal output terminals of the first decoder are respectively connected to different input terminals of the first inverter, the signal output terminals of the second decoder are respectively connected to different input terminals of the second inverter, each effective output terminal of the first inverter is respectively connected to the coil of each first relay via a branch of the driver, and each effective output terminal of the second inverter is respectively connected to the coil of each second relay via a branch of the driver, wherein the input terminals and output terminals of the inverters are paired one by one, and if the input terminal paired with any output terminal is connected to the decoder signal output terminal, then the output terminal is the effective output terminal;

[0051] There are two power amplifier output circuits 33 . One output of the signal generator 32 is connected to the contacts of all the first relays through one power amplifier output circuit 33 , and the other output is connected to the contacts of all the second relays through the other power amplifier output circuit 33 .

[0052] By designing a track signal switching circuit 34, as well as multiple first relays and multiple second relays, and implementing the track signal switching circuit based on a decoder, a commutator and a driver, analog signal control of multiple sections can be provided, thereby realizing continuous signal simulation, and realizing track circuit signals of repeatedly running over a section or a train continuously passing through multiple sections, thereby improving the scope of test coverage and test efficiency.

[0053] Specifically, all first relays and second relays form a relay group, and the maximum difference between the number of first relays and second relays is 1, which can reduce costs. The first relays correspond to odd-numbered segments, and the second relays correspond to even-numbered segments.

[0054] Furthermore, among all the second signal output terminals of the controller 31 , at most one of them outputs the enable signal at the same time. Similarly, among all the third signal output terminals of the controller 31 , at most one of them outputs the enable signal at the same time.

[0055] Generally, the first decoder and the second decoder can use the same signal. For the decoder, the relationship between the number of its signal input terminals and the number of its signal output terminals is: A≤2 B

[0056] Where: A is the number of signal output terminals, and B is the number of signal input terminals.

[0057] Generally it should be A=2 B , so, the three signal input terminals can represent 8 states, as shown in Table 1:

[0058] Table 1

[0059] Each state represents the conduction of one of the signal output terminals. As shown in FIG4 , in this embodiment, it is necessary to implement the simulation of 20 segments, including 10 odd segments and 10 even segments. In this regard, since the decoder used in this embodiment only supports 8 signal output terminals, the signal output terminals of a single decoder are insufficient. Therefore, a total of four decoders are required, two of which are first decoders and two are second decoders. Specifically, U1 and U2 in FIG4 are the first decoders, U3 and U4 are the second decoders, U7 and U9 are the first inverters, and U8 and U9 are the second inverters. 10 is the second inverter. It can be seen that among the 8 signal output terminals Y0 to Y7 of U1, Y0 is connected to the input terminal 1A of U7. The output terminal corresponding to the input terminal 1A of U7 is 1Y, and its output terminal 1Y is connected to the input terminal IN1 of the driver U15, which is pin 1 of U15. The pin paired with pin 1 in U15 is pin 18, which is the output terminal OUT1. OU1 can be connected to the coil of the first relay A1. The other several routes have similar connection relationships, and finally the drive signal for controlling the 10 first relays is obtained.

[0060] The above design also supports the simultaneous simulation of an odd-numbered section and an even-numbered section. Since the first decoder and the second decoder are independent of each other, a first relay and a second relay can be turned on at the same time. In this way, the simulated track circuit signal can be more realistic and simulate a higher-speed train passing signal.

[0061] The first decoder is configured to, upon receiving an enable signal, select a signal output terminal to conduct based on the signal received at its signal input terminal. Similarly, the second decoder is configured to, upon receiving an enable signal, select a signal output terminal to conduct based on the signal received at its signal input terminal. This allows at most one of the controller's second signal output terminals to output an enable signal at any one time, increasing the number of supported segments. This allows for more segments, such as 30, 40, and so on. For example, 30 segments can be achieved with four decoders, while 40 segments require six decoders.

[0062] Of course, the above is only the setting adopted in this embodiment. In other embodiments, other schemes can also be adopted. For example, when the decoder supports 16 outputs, then for the case of 20 segments, only 2 decoders are needed. Or, in some embodiments, only 16 segments need to be simulated, then for a decoder that only supports 8 outputs, only two decoders are needed.

[0063] Otherwise, as shown in Figures 5 to 8, the use of external large-scale power amplifier equipment and signal generators is eliminated. In this application, the signal generator 32 includes a signal generating chip and at least two filtering circuits. The input end of the signal generating chip is connected to the control, and a group of output ends is connected to one of the power amplifier output circuits 33 via a filtering circuit, and the other group of output ends is connected to another power amplifier output circuit 33 via another filtering circuit. The filtering circuit is a three-stage LC filtering circuit. The signal generating chip used in this embodiment is U101 in Figure 5. Its input terminals are P0 to P3, which are provided by the controller. There are four output terminals, namely pin 29, pin 30, pin 35 and pin 36, which are used in pairs. Pin 29 is connected to the input terminal of the fourth filtering circuit in Figure 6, and pin 30 is connected to the input terminal of the third filtering circuit in Figure 6. The others are similar, marked by CH0, CH0B, CH1 and CH1B. In this embodiment, the purpose of setting four filtering circuits is to provide redundancy, avoiding the problem of requiring overall replacement due to damage to a single pin or a single filtering circuit of U101. In other embodiments, two filtering circuits can also be used, and each is connected to only one output pin of U101.

[0064] As shown in FIG9 , the power amplifier output circuit 33 includes power amplifier tubes, namely Q1 and Q2. The output terminal TP106 of the filter circuit in FIG6 is connected to the input terminal P2 of one power amplifier circuit in FIG9 , and the output terminal TP108 of another filter circuit is connected to the input terminal P1 of another power amplifier circuit in FIG9 .

[0065] In addition, the present application also provides a method based on the above-mentioned device, comprising:

[0066] Step S1: Acquire signal simulation configuration information, and generate conduction control signals and simulation signals corresponding to each section based on the configuration information. The configuration signals can be diverse. For example, when it is necessary to simulate the process of section 1 being repeatedly rolled over, the first relay corresponding to section 1 needs to be repeatedly turned on multiple times, and the duration of each rolling over corresponds to the conduction time of the first relay.

[0067] Step S2: Based on the correspondence between each first relay and each second relay and each segment, combined with the obtained conduction control signal and analog signal of each segment, a control signal sequence and an enable signal sequence acting on each first decoder and second decoder, as well as a control signal sequence acting on the signal generator 32 are generated, wherein each first relay corresponds to each odd segment, and each second relay corresponds to each even segment.

[0068] Step S3: Controlling the operation of the track signal switching circuit 34 and the signal generator 32 based on the generated control signal sequence and the enable signal sequence.

[0069] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

Claims

1. A device for continuously generating signals in a passing vehicle track circuit, comprising: A controller, a signal generator, and a power amplifier output circuit, characterized by further comprising a track signal switching circuit, a plurality of first relays, and a plurality of second relays; The track signal switching circuit includes at least one first decoder, at least one second decoder, at least one first inverter, at least one second inverter, at least one, and at least one driver. The driver includes multiple branches, and the number of branches of the driver is greater than or equal to the sum of the number of first relays and second relays. The signal input terminals of the first decoder are connected to the first group of first signal output terminals of the controller, and the enable terminal is connected to the second signal output terminal of the controller. Different first decoders are respectively connected to different second signal output terminals of the controller. The signal input terminals of the second decoder are connected to the second group of first signal output terminals of the controller, and the enable terminal is connected to the third signal output terminal of the controller. Different second decoders are respectively connected to different third signal output terminals of the controller. The signal output terminals of the first decoder are respectively connected to different input terminals of the first inverter. The signal output terminals of the second decoder are respectively connected to different input terminals of the second inverter. Each effective output terminal of the first inverter is respectively connected to the coil of each first relay through a branch of the driver. Each effective output terminal of the second inverter is respectively connected to the coil of each second relay through a branch of the driver. Among them, the input terminals and output terminals of the inverter are paired one by one. If the input terminal paired with any output terminal is connected to the decoder signal output terminal, then this output terminal is an effective output terminal. There are two power amplifier output circuits in total. One output of the signal generator is connected to the contacts of all first relays through one power amplifier output circuit, and the other output is connected to the contacts of all second relays through the other power amplifier output circuit.

2. The device for continuously generating signals in a passing vehicle track circuit according to claim 1, characterized in that, The difference between the number of first relays and second relays is at most 1.

3. The device for continuously generating signals in a passing vehicle track circuit according to claim 1, characterized in that, Among all the second signal output terminals of the controller, at most one of them outputs an enable signal at the same time. Among all the third signal output terminals of the controller, at most one of them outputs an enable signal at the same time.

4. The device for continuously generating signals in a passing vehicle track circuit according to claim 1, characterized in that, The first decoder is configured to: when receiving an enable signal, select a signal output terminal to conduct based on the signal received by its signal input terminal. The second decoder is configured to: when receiving an enable signal, select a signal output terminal to conduct based on the signal received by its signal input terminal.

5. The device for continuously generating signals in a passing vehicle track circuit according to claim 1, characterized in that, The signal generator includes a signal generation chip and at least two filtering circuits. The input terminal of the signal generation chip is connected to the control. One group of output terminals is connected to one power amplifier output circuit through a filtering circuit, and the other group of output terminals is connected to the other power amplifier output circuit through another filtering circuit.

6. The device for continuously generating signals in a passing vehicle track circuit according to claim 5, characterized in that, The filtering circuit is a three-stage LC filtering circuit.

7. The device for continuously generating signals in a passing vehicle track circuit according to claim 1, characterized in that, The power amplifier output circuit includes power amplifier tubes.

8. The device for continuously generating signals in a passing vehicle track circuit according to claim 1, characterized in that, The controller is connected to the host computer through a USB port.

9. The device for continuously generating signals in a passing vehicle track circuit according to claim 1, characterized in that, The relationship between the number of signal input terminals and the number of signal output terminals of the first decoder is: A ≤ 2 B Where: A is the number of signal output terminals, and B is the number of signal input terminals.

10. A method based on the device according to any one of claims 1-9, characterized in that, Including: Step S1: Obtain signal simulation configuration information, and generate conduction control signals and analog signals corresponding to each section according to the configuration information; Step S2: Based on each first relay and the correspondence between each second relay and each section, combine the obtained conduction control signals and analog signals of each section to generate a control signal sequence and an enable signal sequence acting on each first decoder and second decoder, as well as a control signal sequence acting on the signal generator, where each first relay corresponds to each odd-numbered section respectively, and each second relay corresponds to each even-numbered section respectively; Step S3: Control the operation of the track signal switching circuit and the signal generator based on the generated control signal sequence and enable signal sequence.

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