Vehicle passing track circuit signal continuous generation device and method

Abstract

The invention relates to a vehicle passing track circuit signal continuous generation device and method.The device 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 phase inverter, at least one second phase inverter, at least one driver and at least one driver, the driver comprises a plurality of branches, and the number of the branches of the driver is larger than or equal to the sum of the number of the first relays and the number of the second relays. Compared with the prior art, analog signal control of multiple sections can be provided, so that continuous signal simulation is achieved, track circuit signals of one section can be repeatedly ground or a train continuously passes through the multiple sections, the coverage range of the test is widened, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of railway communication, and particularly to a device and method for continuously generating signals of a passing train track circuit. Background Art

[0002] In recent years, with the rapid development of the information industry, the requirements for signal safety equipment in various industries have become increasingly strict. As an interval track circuit safety product, the operation status of the ZPW-2000 type non-insulated frequency shift automatic block is constantly being monitored, and the LKMG2-TH type ZPW-2000 interval track circuit outdoor monitoring system meets the market demand.

[0003] During the test of the track circuit outdoor monitoring system, various signals of the track circuit need to be simulated. Among them, the simulation of the current signal of the rail track circuit when a train passes is an important part. In the prior art, for this signal, a signal generator and a power amplifier are usually used in combination. However, this solution can only simulate single-point signals and cannot simulate continuous signals. For example, it cannot simulate the situation where a train repeatedly crushes the rails in a certain interval or the track circuit signals of continuously passing through multiple sections of rails. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for continuously generating signals of a passing train track circuit.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A device for continuously generating signals of a passing train track circuit includes: a controller, a signal generator, a power amplifier output circuit, a track signal switching circuit, a plurality of first relays, and a plurality of second relays;

[0007] 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.

[0008] The signal input terminal of the first decoder is 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.

[0009] The signal input terminal of the second decoder is 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.

[0010] 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, the effective output terminals of the first inverter are respectively connected to the coils of the first relays via a branch of the driver, and the effective output terminals of the second inverter are respectively connected to the coils of the second relays via a branch of the driver, where 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 signal output terminal of the decoder, then this output terminal is an effective output terminal;

[0011] 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.

[0012] The difference between the number of the first relays and the number of the second relays is at most 1.

[0013] Among all the second signal output terminals of the controller, at most one of them outputs an enable signal at the same time,

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

[0015] The first decoder is configured to: when receiving an enable signal, select one signal output terminal to conduct based on the signal received at its signal input terminal;

[0016] The second decoder is configured to: when receiving an enable signal, select one signal output terminal to conduct based on the signal received at its signal input terminal.

[0017] The signal generator includes a signal generation chip and at least two filter 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 via a filter circuit, and the other group of output terminals is connected to the other power amplifier output circuit via another filter circuit.

[0018] The filter circuit is a three-stage LC filter circuit.

[0019] The power amplifier output circuit includes a power amplification tube.

[0020] The controller is connected to the host computer through a USB port.

[0021] The relationship between the number of signal input terminals and the number of signal output terminals of the first decoder is:

[0022] A≤2 B

[0023] Wherein: 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: Obtain signal simulation configuration information, and generate turn-on control signals and analog signals corresponding to each section according to the configuration information;

[0026] Step S2: Based on each first relay and the corresponding relationship between each second relay and each section, combine the obtained turn-on 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, and a control signal sequence acting on the signal generator, wherein each first relay corresponds to each odd section respectively, and each second relay corresponds to each even section respectively.

[0027] Step S3: Control the track signal switching circuit and the signal generator to work based on the generated control signal sequence and 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, a plurality of first relays and a plurality of second relays, and realizing the track signal switching circuit based on a decoder, a commutator and a driver, it is possible to provide analog signal control for multiple sections, so as to realize continuous signal simulation, and it is possible to repeatedly roll over a section or the train continuously pass through the track circuit signals of multiple sections, improving the coverage range and test efficiency of the test.

[0030] 2. The maximum difference between the number of first relays and the number of second relays 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 sections.

[0032] 4. It can automatically calculate the train occupancy time according to train and section information, with a high degree of intelligence, and it is beneficial to monitor the use of equipment by generating a train occupancy schedule. Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of the application scenario of the present invention;

[0034] Figure 2 It is a schematic logic diagram of the use of the present invention;

[0035] Figure 3 It is a schematic structural diagram of the present invention;

[0036] Figure 4It is the circuit schematic diagram of the track signal switching circuit;

[0037] Figure 5 It is the wiring principle schematic diagram of the signal generation chip;

[0038] Figure 6 It is the schematic diagram of the filter circuit;

[0039] Figure 7 It is the schematic diagram of other peripheral circuits of the signal generator;

[0040] Figure 8 It is the signal schematic diagram of the controller for the signal generator part;

[0041] Figure 9 It is the circuit schematic diagram of the power amplifier output circuit;

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

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

[0044] An over-car track circuit signal continuous generation device, which is applied to the system as shown in Figure 1 shown, and the working principle is as shown in Figure 2 shown. The host computer 1 sends configuration information (including occupied section number, section occupation duration, waiting duration, repeated occupation times, track circuit signal, etc.) to the signal continuous generation device through the USB port 2, and receives the train occupation track section time table sent by the over-car simulation device;

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

[0046] As shown in Figure 3 shown, the signal continuous generation 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, as well as a plurality of first relays and a plurality of second relays;

[0047] As shown in Figure 4As shown, 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 [component not specified in the original] 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 numbers of the first relay and the second relay.

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

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

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

[0052] By designing the track signal switching circuit 34, as well as multiple first relays and multiple second relays, and implementing the track signal switching circuit based on decoders, commutators and drivers, it is possible to provide analog signal control for multiple sections, thereby realizing continuous signal simulation. It can realize repeatedly rolling a section or the train continuously passing through the track circuits of multiple sections, improving the coverage range and test efficiency of the test.

[0053] Specifically, all first relays and second relays form a relay group, and the maximum difference between the numbers of the first relay and the second relay is 1, which can reduce costs. The first relay corresponds to odd sections, and the second relay corresponds to even sections.

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

[0055] Generally, the first decoder and the second decoder can use the same signals. For a decoder, the relationship between the number of signal input terminals and the number of signal output terminals is:

[0056] A ≤ 2 B

[0057] Where: A is the number of signal output terminals, and B is the number of signal input terminals.

[0058] Generally, it should be A = 2 B , thus, three signal input terminals can represent 8 states, as shown in Table 1 specifically:

[0059] Table 1

[0060]

[0061]

[0062] Each state represents turning on one of the signal output terminals. As Figure 4 shown, in this embodiment, since it is necessary to simulate 20 sections, a total of 10 odd sections and 10 even sections. For this, 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 the first decoders and two are the second decoders. Specifically, Figure 4 U1 and U2 in are the first decoders, U3 and U4 are the second decoders, U7 and U9 are the first inverters, and U8 and U10 are the second inverters. 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, and the output terminal corresponding to the input terminal 1A of U7 is 1Y. Its output terminal 1Y is connected to the input terminal IN1 of the driver U15, that is, pin 1 of U15. The pin paired with pin 1 in U15 is pin 18, that is, the output terminal OUT1. OU1 can be connected to the coil of the first relay A1. The connection relationships of the other several paths are similar. Finally, drive signals for controlling 10 first relays are obtained.

[0063] The above design also supports the simultaneous simulation of an odd section and an even section. Since the first decoder and the second decoder are independent of each other, the simultaneous conduction of a first relay and a second relay can be achieved. Thus, the simulated track circuit signal can be more realistic and simulate the passing signal of a faster train.

[0064] The first decoder is configured to: when receiving an enable signal, select one signal output terminal to conduct based on the signal received at its signal input terminal; similarly, the second decoder is configured to: when receiving an enable signal, select one signal output terminal to conduct based on the signal received at its signal input terminal. In this way, 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 sections. That is to say, more sections can be realized, such as 30 sections, 40 sections, etc. For example, when there are 30 sections, it can also be realized by four decoders. When there are 40 sections, six decoders are required.

[0065] Of course, the above is only the setting adopted in this embodiment. In other embodiments, other solutions can also be adopted. For example, when the decoder supports 16 outputs, for the case of 20 sections, only 2 decoders are needed. Or, in some embodiments, if only 16 sections need to be simulated, for a decoder that only supports 8 outputs, only 2 decoders are also needed.

[0066] Other, such as Figures 5 to 8 As shown, the use of external large-scale power amplifier devices and signal generators is eliminated. In this application, the signal generator 32 includes a signal generation chip and at least two filter circuits. The input terminal of the signal generation chip is connected to the control. One group of output terminals is connected to one of the power amplifier output circuits 33 via a filter circuit, and the other group of output terminals is connected to another power amplifier output circuit 33 via another filter circuit. The filter circuit is a three-stage LC filter circuit. The signal generation chip adopted in this embodiment is Figure 5 U101 in, whose input terminals are P0 to P3 respectively, provided by the controller. There are four output terminals, which are pin 29, pin 30, pin 35, and pin 36 respectively, and are used in pairs. Pin 29 is connected to Figure 6 the input terminal of the fourth filter circuit in, and pin 30 is connected to Figure 6 the input terminal of the third filter circuit in. Similarly for others, and are identified by CH0, CH0B, CH1, and CH1B. In this embodiment, the purpose of setting four filter circuits is to provide redundancy, avoiding the problem of needing to replace the whole due to the damage of a single pin of U101 or a single filter circuit. In other embodiments, only two filter circuits can also be used and are respectively only connected to one output pin of U101.

[0067] Such as Figure 9 As shown, the power amplifier output circuit 33 includes power amplification transistors, which are Q1 and Q2 respectively, Figure 6 the output terminal TP106 of the filter circuit in is connected to Figure 9 the input terminal P2 of one of the power amplifier circuits in, and the output terminal TP108 of the other filter circuit is connected toFigure 9 The input terminal P1 of another power amplifier circuit in

[0068] In addition, the present application also provides a method based on the above-mentioned device, including:

[0069] Step S1: Obtain signal simulation configuration information, and generate turn-on control signals and analog signals corresponding to each section according to 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, the first relay corresponding to section 1 needs to be turned on repeatedly for many times, and in addition, the time of each roll corresponds to the turn-on time of this first relay;

[0070] Step S2: Based on each first relay and the corresponding relationship between each second relay and each section, combine the obtained turn-on 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, and a control signal sequence acting on the signal generator 32, wherein each first relay corresponds to each odd-numbered section respectively, and each second relay corresponds to each even-numbered section respectively.

[0071] Step S3: Control the operation of the track signal switching circuit 34 and the signal generator 32 based on the generated control signal sequence and enable signal sequence.

[0072] 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 such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. And the aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

Claims

1. A device for continuously generating signals of a passing vehicle track circuit, comprising: a controller, a signal generator, and a power amplifier output circuit, characterized in that it further comprises a track signal switching circuit, as well as 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 end of the first decoder is connected to the first group of first signal output ends of the controller, and the enable end is connected to the second signal output end of the controller. Different first decoders are respectively connected to different second signal output ends of the controller. The signal input end of the second decoder is connected to the second group of first signal output ends of the controller, and the enable end is connected to the third signal output end of the controller. Different second decoders are respectively connected to different third signal output ends of the controller. The signal output ends of the first decoder are respectively connected to different input ends of the first inverter. The signal output ends of the second decoder are respectively connected to different input ends of the second inverter. Each effective output end of the first inverter is respectively connected to the coil of each first relay through a branch of the driver. Each effective output end of the second inverter is respectively connected to the coil of each second relay through a branch of the driver. Among them, the input end and the output end of the inverter are paired one by one. If the input end paired with any output end is connected to the decoder signal output end, then this output end is an effective output end. 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 of the power amplifier output circuits, 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 of a passing vehicle track circuit according to claim 1, characterized in that the maximum difference between the number of the first relays and the number of the second relays is 1.

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

4. The device for continuously generating signals of 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 end to conduct based on the signal received by its signal input end; the second decoder is configured to: when receiving an enable signal, select a signal output end to conduct based on the signal received by its signal input end.

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

6. An on-vehicle track circuit signal continuous generation device according to claim 5, characterized in that the filter circuit is a three-stage LC filter circuit.

7. An on-vehicle track circuit signal continuous generation device according to claim 1, characterized in that the power amplifier output circuit includes a power amplification tube.

8. An on-vehicle track circuit signal continuous generation device according to claim 1, characterized in that the controller is connected to the host computer through a USB port.

9. An on-vehicle track circuit signal continuous generation device according to claim 1, characterized in that the relationship between the number of signal input ends and the number of signal output ends of the first decoder is: A≤2 B where: A is the number of signal output ends, and B is the number of signal input ends.

10. A method based on the device according to any one of claims 1-9, characterized in that it includes: Step S1: Obtain signal simulation configuration information, and generate turn-on control signals and analog signals corresponding to each section according to the configuration information; Step S2: Based on each first relay and the corresponding relationship between each second relay and each section, combine the obtained turn-on 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, and a control signal sequence acting on the signal generator, wherein each first relay corresponds to each odd section respectively, and each second relay corresponds to each even 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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