Track circuit receiver and track circuit detection method and device

Abstract

The invention provides a track circuit receiver and a track circuit detection method and device, and relates to the technical field of railways, the track circuit receiver comprises a first processor, a second processor, a first acquisition circuit and a second acquisition circuit; the first impedance matching module is used for converting a voltage signal of the self-checking power supply to obtain a first voltage signal and sending the first voltage signal to the first processor; the second impedance matching module is used for converting the voltage signal of the self-checking power supply to obtain a second voltage signal and sending the second voltage signal to the second processor; the target processor is used for self-checking the track circuit based on the first voltage signal and the second voltage signal. According to the invention, the voltage signal of the self-checking power supply is acquired through the first impedance matching module and the second impedance matching module which are different, and then the track circuit is self-checked based on the acquired first voltage signal and the second voltage signal, so that the track circuit self-checking circuit can adapt to different types of track circuits; therefore, the universality of the track circuit receiver is improved.

Description

Technical Field

[0001] The present invention relates to the field of railway technology, and in particular to a track circuit receiver, a track circuit detection method and a track circuit detection device. Background Art

[0002] Track circuit receivers, as important equipment in the track circuit system, are responsible for detecting track occupancy. When the track is occupied by a train, subsequent trains cannot enter this section to ensure the safety of train operation. Microelectronic technology is used in the fully electronic interlocking to replace the safety relay as the track circuit receiver. Because it is closely related to driving safety, the fully electronic track circuit receiver should have a SIL-4 safety level. There are many types of track circuits, including AC continuous track circuits, 25Hz phase-sensitive track circuits, and 50Hz phase-sensitive track circuits.

[0003] In the related art, corresponding track circuit receivers need to be designed for each type of track circuit, which makes it impossible to unify the track circuit receivers, thereby reducing the versatility of the track circuit receivers. Summary of the invention

[0004] The present invention provides a track circuit receiver, a method and a device for detecting a track circuit, so as to solve the defect of reducing the versatility of the track circuit receiver in the prior art.

[0005] The present invention provides a track circuit receiver, comprising a first processor, a second processor, a first acquisition circuit and a second acquisition circuit; the first acquisition circuit comprises a first impedance matching module and a first voltage acquisition module, the second acquisition circuit comprises a second impedance matching module and a second voltage acquisition module, the input end of the first impedance matching module and the input end of the second impedance matching module are both connected to a self-test power supply, the output end of the first impedance matching module is connected to the first processor through the first voltage acquisition module, and the output end of the second impedance matching module is connected to the second processor through the second voltage acquisition module; the first impedance matching module is different from the second impedance matching module; The first impedance matching module is used to convert the voltage signal of the self-test power supply, and send the first voltage signal obtained after the conversion to the first processor through the first voltage acquisition module; The second impedance matching module is used to convert the voltage signal of the self-test power supply, and send the second voltage signal obtained after the conversion to the second processor through the second voltage acquisition module; A target processor is used to perform self-inspection on the track circuit based on the first voltage signal and the second voltage signal, and the target processor includes the first processor or the second processor.

[0006] According to a track circuit receiver provided by the present invention, the first impedance matching module includes a first capacitor, a first resistor and a second resistor, the first end of the first capacitor and the first end of the first resistor are both connected to the self-test power supply, the second end of the first capacitor is connected to the first voltage acquisition module through the second resistor, and the second end of the first resistor is connected to the first voltage acquisition module.

[0007] According to a track circuit receiver provided by the present invention, the second impedance matching module includes a second capacitor, a third resistor and a fourth resistor, the first end of the third resistor and the first end of the fourth resistor are both connected to the self-test power supply, the second end of the third resistor is respectively connected to the first end of the second capacitor and the second voltage acquisition module, and the second end of the fourth resistor is respectively connected to the second end of the second capacitor and the second voltage acquisition module; the difference between the phase of the voltage output by the first impedance matching module and the phase of the voltage output by the second impedance matching module is a first preset value.

[0008] According to a track circuit receiver provided by the present invention, the first acquisition circuit further includes a third impedance matching module, the second acquisition circuit includes a fourth impedance matching module, the input end of the third impedance matching module is respectively connected to the first track power supply and the output end of the first impedance matching module, and the output end of the third impedance matching module is connected to the first voltage acquisition module; the input end of the fourth impedance matching module is respectively connected to the first track power supply and the output end of the second impedance matching module, and the output end of the fourth impedance matching module is connected to the second voltage acquisition module; The sum of the impedance value of the first impedance matching module and the impedance value of the third impedance matching module is a first preset impedance value, and the sum of the impedance value of the second impedance matching module and the impedance value of the fourth impedance matching module is a second preset impedance value.

[0009] According to a track circuit receiver provided by the present invention, the target processor is specifically used to determine that the first track power supply self-test has passed when it is determined that the ratio of the amplitude of the first voltage signal to the amplitude of the second voltage signal is the second preset value, and the difference between the phase of the first voltage signal and the phase of the second voltage signal is the first preset value; the second preset value is the ratio of the second preset impedance value to the first preset impedance value.

[0010] According to a track circuit receiver provided by the present invention, the first acquisition circuit further includes a first switch and a second switch, the second acquisition circuit further includes a third switch and a fourth switch, the output end of the first impedance matching module is connected to the input end of the third impedance matching module through the first switch, and the first track power supply is connected to the input end of the third impedance matching module through the second switch; the output end of the second impedance matching module is connected to the input end of the fourth impedance matching module through the third switch, and the first track power supply is connected to the input end of the fourth impedance matching module through the fourth switch; The target processor is further configured to control the first switch and the third switch to be closed, and control the second switch and the fourth switch to be opened, when the acquisition circuit for acquiring the voltage signal of the self-test power supply works normally.

[0011] According to a track circuit receiver provided by the present invention, the target processor is further used to control the second switch and the fourth switch to be closed, and control the first switch and the third switch to be opened, when the first track power supply passes the self-test; The third impedance matching module is used to convert the voltage signal of the first track power supply, and send the third voltage signal obtained after the conversion to the first processor through the first voltage acquisition module; The fourth impedance matching module is used to convert the voltage signal of the first track power supply, and send the fourth voltage signal obtained after the conversion to the second processor through the second voltage acquisition module; The target processor is further configured to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal when the track circuit includes an AC continuous track circuit; The target processor is further used to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, the phase of the third voltage signal and the phase of the fourth voltage signal, and the phase of the voltage signal of the first track power supply and the phase of the voltage signal of the self-test power supply when the track circuit includes a phase-sensitive track circuit.

[0012] A track circuit receiver provided according to the present invention also includes a third acquisition circuit and a fourth acquisition circuit. The third acquisition circuit has the same structure as the first acquisition circuit, and the fourth acquisition circuit has the same structure as the second acquisition circuit. The input end of the third acquisition circuit and the input end of the fourth acquisition circuit are both connected to the second track power supply, the output end of the third acquisition circuit is connected to the first processor, and the output end of the fourth acquisition circuit is connected to the second processor.

[0013] According to a track circuit receiver provided by the present invention, when the track circuit includes an AC continuous track circuit, the self-test power supply is an external power supply; when the track circuit includes a phase-sensitive track circuit, the self-test power supply is a local power supply of the phase-sensitive track circuit.

[0014] The present invention further provides a method for detecting a track circuit, which is applied to the track circuit receiver described in any one of the above embodiments, and the method comprises: Receive a first voltage signal sent by a first voltage acquisition module and a second voltage signal sent by a second voltage acquisition module, wherein the first voltage signal is obtained by converting the voltage signal of the self-test power supply by the first impedance matching module, and the second voltage signal is obtained by converting the voltage signal of the self-test power supply by the second impedance matching module; Based on the first voltage signal and the second voltage signal, a self-check is performed on the track circuit.

[0015] The present invention also provides a track circuit detection device, comprising: A receiving unit, used to receive a first voltage signal sent by the first voltage acquisition module and a second voltage signal sent by the second voltage acquisition module, wherein the first voltage signal is obtained by converting the voltage signal of the self-test power supply by the first impedance matching module, and the second voltage signal is obtained by converting the voltage signal of the self-test power supply by the second impedance matching module; A self-check unit is used to perform a self-check on the track circuit based on the first voltage signal and the second voltage signal.

[0016] The present invention also provides a track circuit receiver, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a track circuit detection method as described above is implemented.

[0017] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the detection method of the track circuit as described in any one of the above is implemented.

[0018] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned track circuit detection methods.

[0019] The track circuit receiver, the detection method and device of the track circuit provided by the present invention, the track circuit receiver includes a first processor, a second processor, a first acquisition circuit and a second acquisition circuit, the first acquisition circuit includes a first impedance matching module and a first voltage acquisition module, the second acquisition circuit includes a second impedance matching module and a second voltage acquisition module; the first impedance matching module converts the voltage signal of the self-test power supply to obtain a first voltage signal and sends it to the first processor through the first voltage acquisition module; the second impedance matching module converts the voltage signal of the self-test power supply to obtain a second voltage signal and sends it to the second processor through the second voltage acquisition module; the first processor or the second processor performs self-test on the track circuit based on the first voltage signal and the second voltage signal. It can be known that the track circuit receiver of the present invention collects the voltage signal of the self-test power supply through different first impedance matching modules and second impedance matching modules, and then performs self-test on the track circuit based on the collected first voltage signal and second voltage signal. The setting of the first impedance matching module and the second impedance matching module is independent of the type of the track circuit, so it can be adapted to different types of track circuits, thereby improving the versatility of the track circuit receiver. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is one of the principle schematic diagrams of the track circuit receiver provided in an embodiment of the present invention.

[0022] Figure 2 It is a circuit diagram of a first impedance matching module provided in an embodiment of the present invention.

[0023] Figure 3 It is a circuit diagram of a second impedance matching module provided in an embodiment of the present invention.

[0024] Figure 4 This is the second principle schematic diagram of the track circuit receiver provided in an embodiment of the present invention.

[0025] Figure 5 This is the third principle schematic diagram of the track circuit receiver provided in an embodiment of the present invention.

[0026] Figure 6 It is a schematic diagram of the overall principle of a track circuit receiver provided by an embodiment of the present invention.

[0027] Figure 7It is a flow chart of a detection method for an AC continuous track circuit provided in an embodiment of the present invention.

[0028] Figure 8 It is a flow chart of a detection method for a phase-sensitive track circuit provided in an embodiment of the present invention.

[0029] Fig. 9 It is a schematic diagram of the structure of a detection device for a track circuit provided in an embodiment of the present invention.

[0030] Fig.10 It is a schematic diagram of the physical structure of a track circuit receiver provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Figure 1 This is one of the principle schematic diagrams of the track circuit receiver provided by the embodiment of the present invention, such as Figure 1 As shown, the track circuit receiver includes a first processor, a second processor, a first acquisition circuit and a second acquisition circuit; the first acquisition circuit includes a first impedance matching module and a first voltage acquisition module, the second acquisition circuit includes a second impedance matching module and a second voltage acquisition module, the input end of the first impedance matching module and the input end of the second impedance matching module are both connected to the self-test power supply, the output end of the first impedance matching module is connected to the first processor through the first voltage acquisition module, and the output end of the second impedance matching module is connected to the second processor through the second voltage acquisition module; the first impedance matching module is different from the second impedance matching module.

[0033] The first impedance matching module is used to convert the voltage signal of the self-test power supply, and send the first voltage signal obtained after the conversion to the first processor through the first voltage acquisition module.

[0034] The second impedance matching module is used to convert the voltage signal of the self-test power supply, and send the second voltage signal obtained after the conversion to the second processor through the second voltage acquisition module.

[0035] A target processor is used to perform self-inspection on the track circuit based on the first voltage signal and the second voltage signal, and the target processor includes the first processor or the second processor.

[0036] Among them, the self-test power supply outputs an AC signal of 110V, 50Hz.

[0037] For example, since the voltage of the self-test power supply is higher than the voltage of the track power supply, an impedance matching module is required to enable the self-test power supply to be connected to the first acquisition circuit and the second acquisition circuit to prevent the first acquisition circuit and the second acquisition circuit from being damaged. When designing the first impedance matching module and the second impedance matching module, the first impedance matching module is equivalent to a high-pass filter, so that the phase of the input end of the first impedance matching module lags behind the phase of the output end of the first impedance matching module by 90 degrees, and the second impedance matching module is equivalent to a low-pass filter, so that the phase of the input end of the second impedance matching module leads the phase of the output end of the second impedance matching module by 90 degrees. The first impedance matching module converts the voltage signal output by the self-test power supply to obtain a first voltage signal, and sends the first voltage signal to the first processor through the first voltage acquisition module; the second impedance matching module converts the voltage signal output by the self-test power supply to obtain a second voltage signal, and sends the second voltage signal to the second processor through the second voltage acquisition module. Data communication can be performed between the first processor and the second processor, so the second processor can send the received second voltage signal to the first processor, using the first processor as the target processor. The first processor can also send the received first voltage signal to the second processor, using the second processor as the target processor. The target processor determines whether the difference between the first voltage signal and the second voltage signal matches the design difference between the first impedance matching module and the second impedance matching module. When it is determined that the difference between the first voltage signal and the second voltage signal matches the design difference between the first impedance matching module and the second impedance matching module, it is determined that the track circuit self-test has passed; when it is determined that the difference between the first voltage signal and the second voltage signal does not match the design difference between the first impedance matching module and the second impedance matching module, it is determined that the track circuit self-test has failed.

[0038] It should be noted that the processor and acquisition circuit of the present invention are both two-system processing, adopting a two-by-two-take-two architecture, which can further ensure that the track circuit receiver can reach the SIL-4 safety level.

[0039] The track circuit receiver provided by the present invention comprises a first processor, a second processor, a first acquisition circuit and a second acquisition circuit, the first acquisition circuit comprises a first impedance matching module and a first voltage acquisition module, the second acquisition circuit comprises a second impedance matching module and a second voltage acquisition module; the first impedance matching module converts the voltage signal of the self-test power supply to obtain a first voltage signal and sends it to the first processor through the first voltage acquisition module; the second impedance matching module converts the voltage signal of the self-test power supply to obtain a second voltage signal and sends it to the second processor through the second voltage acquisition module; the first processor or the second processor performs self-test on the track circuit based on the first voltage signal and the second voltage signal. It can be known that the track circuit receiver of the present invention collects the voltage signal of the self-test power supply through different first impedance matching modules and second impedance matching modules, and then performs self-test on the track circuit based on the collected first voltage signal and second voltage signal. The setting of the first impedance matching module and the second impedance matching module is independent of the type of the track circuit, so it can be adapted to different types of track circuits, thereby improving the versatility of the track circuit receiver.

[0040] In one embodiment, Figure 2 is a circuit diagram of a first impedance matching module provided in an embodiment of the present invention, such as Figure 2 As shown, the first impedance matching module includes a first capacitor C1, a first resistor R1 and a second resistor R2, the first end of the first capacitor C1 and the first end of the first resistor R1 are both connected to the self-test power supply, the second end of the first capacitor C1 is connected to the first voltage acquisition module through the second resistor R2, and the second end of the first resistor R1 is connected to the first voltage acquisition module.

[0041] For example, Figure 2 The first impedance matching module shown is equivalent to a high-pass filter, so that the phase of the input end of the first impedance matching module lags behind the phase of the output end of the first impedance matching module by 90 degrees.

[0042] In this embodiment, the phase of the input end of the first impedance matching module is designed to lag behind the phase of the output end of the first impedance matching module by 90 degrees, so as to cooperate with the second impedance matching module to adjust the phase of the voltage signal output by the self-test power supply, thereby achieving a heterogeneous effect and improving the safety of the track circuit receiver.

[0043] In one embodiment, Figure 3 is a circuit diagram of a second impedance matching module provided in an embodiment of the present invention, such as Figure 3As shown, the second impedance matching module includes a second capacitor C2, a third resistor R3 and a fourth resistor R4, the first end of the third resistor R3 and the first end of the fourth resistor R4 are both connected to the self-test power supply, the second end of the third resistor R3 is respectively connected to the first end of the second capacitor C2 and the second voltage acquisition module, and the second end of the fourth resistor R4 is respectively connected to the second end of the second capacitor C2 and the second voltage acquisition module; the difference between the phase of the voltage output by the first impedance matching module and the phase of the voltage output by the second impedance matching module is a first preset value.

[0044] For example, the second impedance matching module is equivalent to a low-pass filter, so that the phase of the input end of the second impedance matching module leads the phase of the output end of the second impedance matching module by 90 degrees. In this way, the difference between the phase of the second voltage signal received by the first processor and the second processor and the phase of the first voltage signal is 180 degrees, and the difference in phase achieves a heterogeneous effect and avoids common cause failure.

[0045] In this embodiment, the phase of the input end of the second impedance matching module is designed to lead the phase of the output end of the second impedance matching module by 90 degrees, so as to cooperate with the first impedance matching module to adjust the phase of the voltage signal output by the self-test power supply, thereby achieving a heterogeneous effect, improving the safety of the track circuit receiver, and avoiding common cause failures.

[0046] In one embodiment, Figure 4 This is the second schematic diagram of the principle of the track circuit receiver provided by the embodiment of the present invention, such as Figure 4 As shown, the first acquisition circuit also includes a third impedance matching module, and the second acquisition circuit includes a fourth impedance matching module. The input end of the third impedance matching module is respectively connected to the first track power supply and the output end of the first impedance matching module, and the output end of the third impedance matching module is connected to the first voltage acquisition module; the input end of the fourth impedance matching module is respectively connected to the first track power supply and the output end of the second impedance matching module, and the output end of the fourth impedance matching module is connected to the second voltage acquisition module.

[0047] The sum of the impedance value of the first impedance matching module and the impedance value of the third impedance matching module is a first preset impedance value, and the sum of the impedance value of the second impedance matching module and the impedance value of the fourth impedance matching module is a second preset impedance value.

[0048] For example, the third impedance matching module and the fourth impedance matching module provide impedance for the 25Hz phase-sensitive track circuit and the 50Hz phase-sensitive track circuit, and also provide matching impedance for the AC continuous track circuit. The third impedance matching module and the fourth impedance matching module need to set impedance values ​​according to the actual track circuit; the sum of the impedance value of the first impedance matching module and the impedance value of the third impedance matching module is designed to be the first preset impedance value, for example, the first preset impedance value is 45k ohms; the sum of the impedance value of the second impedance matching module and the impedance value of the fourth impedance matching module is designed to be the second preset impedance value, for example, the second preset impedance value is 60 k ohms. In this way, the ratio of the amplitude of the first voltage signal received by the first processor to the amplitude of the second voltage signal received by the second processor is the second preset value, and the second preset value is the ratio of the second preset impedance value to the first preset impedance value. When the first preset impedance value is 45k ohms and the second preset impedance value is 60 k ohms, the second preset value is approximately equal to 1.33, and the difference in amplitude achieves a heterogeneous effect, further avoiding common cause failure.

[0049] In one embodiment, the target processor is specifically used to determine that the first rail power supply self-test passes when it is determined that the ratio of the amplitude of the first voltage signal to the amplitude of the second voltage signal is the second preset value, and the difference between the phase of the first voltage signal and the phase of the second voltage signal is the first preset value, and the second preset value is the ratio of the second preset impedance value to the first preset impedance value.

[0050] For example, when the track circuit is an AC continuous track circuit, a 25Hz phase-sensitive track circuit or a 50Hz phase-sensitive track circuit, the target processor analyzes the amplitude of the first voltage signal and the amplitude of the second voltage signal when receiving the first voltage signal and the second voltage signal, and analyzes the phase of the first voltage signal and the phase of the second voltage signal. When it is determined that the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal is a second preset value, and when it is determined that the difference between the phase of the first voltage signal and the phase of the second voltage signal is a first preset value, it is determined that the first track power supply self-test has passed, that is, the first track voltage is working normally, and the self-test of the track power supply is achieved.

[0051] It should be noted that, when the track circuit is an AC continuous track circuit, a 25Hz phase-sensitive track circuit or a 50Hz phase-sensitive track circuit, the first track power supply self-test is determined to have passed only when the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal is determined to be a second preset value, the difference between the phase of the first voltage signal and the phase of the second voltage signal is determined to be a first preset value, and the frequency of the second voltage signal and the frequency of the first voltage signal are determined to be the same as the frequency of the voltage signal output by the self-test power supply, thereby further improving the accuracy of the track circuit self-test.

[0052] In this embodiment, self-checking is implemented by the difference between the phase of the first voltage signal and the phase of the second voltage signal and the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal, thereby improving the accuracy of self-checking.

[0053] In one embodiment, Figure 5 This is the third schematic diagram of the principle of the track circuit receiver provided by the embodiment of the present invention, such as Figure 5 As shown, the first acquisition circuit also includes a first switch and a second switch, the second acquisition circuit also includes a third switch and a fourth switch, the output end of the first impedance matching module is connected to the input end of the third impedance matching module through the first switch, and the first track power supply is connected to the input end of the third impedance matching module through the second switch; the output end of the second impedance matching module is connected to the input end of the fourth impedance matching module through the third switch, and the first track power supply is connected to the input end of the fourth impedance matching module through the fourth switch.

[0054] The target processor is further configured to control the first switch and the third switch to be closed, and control the second switch and the fourth switch to be opened, when the acquisition circuit for acquiring the voltage signal of the self-test power supply works normally.

[0055] The first switch, the second switch, the third switch and the fourth switch may all be relays or other switches. When they are relays, it is preferred to use a forced-guided safety relay.

[0056] By way of example, an acquisition circuit for collecting a voltage signal of a self-test power supply may include a fifth acquisition circuit and a sixth acquisition circuit, wherein the fifth acquisition circuit is connected between the self-test power supply and the first processor, and the sixth acquisition circuit is connected between the self-test power supply and the second processor. The voltage signal of the self-test power supply is collected by the fifth acquisition circuit and the collected voltage signal of the self-test power supply is sent to the first processor, and the voltage signal of the self-test power supply is collected by the sixth acquisition circuit and the collected voltage signal of the self-test power supply is sent to the second processor. When the amplitude and frequency of the voltage signal of the self-test power supply received by the second processor are the same as the amplitude and frequency of the voltage signal of the self-test power supply received by the first processor, it is determined that the acquisition circuit for collecting the voltage signal of the self-test power supply is working normally. At this time, the first switch and the third switch are controlled to be closed to connect the self-test power supply with the first acquisition circuit and the second acquisition circuit to realize self-test of the track circuit; and the second switch and the fourth switch are controlled to be opened to disconnect the first track power supply from the first acquisition circuit and the second acquisition circuit.

[0057] In this embodiment, the self-check process is automatically executed by controlling the first switch, the second switch, the third switch and the fourth switch, thereby improving the efficiency of the self-check.

[0058] In one embodiment, the target processor is further configured to control the second switch and the fourth switch to be closed, and control the first switch and the third switch to be opened, when the first track power supply self-test passes.

[0059] The third impedance matching module is used to convert the voltage signal of the first track power supply, and send the third voltage signal obtained after the conversion to the first processor through the first voltage acquisition module.

[0060] The fourth impedance matching module is used to convert the voltage signal of the first track power supply, and send the fourth voltage signal obtained after the conversion to the second processor through the second voltage acquisition module.

[0061] The target processor is further configured to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal when the track circuit includes an AC continuous track circuit.

[0062] The target processor is further used to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, the phase of the third voltage signal and the phase of the fourth voltage signal, and the phase of the voltage signal of the first track power supply and the phase of the voltage signal of the self-test power supply when the track circuit includes a phase-sensitive track circuit.

[0063] For example, when the first track power supply passes the self-test, the target processor controls the second switch and the fourth switch to close, and controls the first switch and the third switch to open, so that the first track power supply is connected to the first acquisition circuit and the second acquisition circuit. The third impedance matching module in the first acquisition circuit converts the voltage signal of the first track power supply to obtain a third voltage signal, and sends the third voltage signal to the first processor through the first voltage acquisition module; the fourth impedance matching module in the second acquisition circuit converts the voltage signal of the first track power supply to obtain a fourth voltage signal, and sends the fourth voltage signal to the second processor through the second voltage acquisition module. Data communication can be performed between the second processor and the first processor, so the first processor or the second processor is used as the target processor, and the target processor can obtain the third voltage signal and the fourth voltage signal.

[0064] In the case where the track circuit includes an AC continuous track circuit, when it is determined that the third voltage signal and the fourth voltage signal are the same, it means that the acquisition is normal, and the track state is determined based on the analysis of the amplitude and frequency of the third voltage signal or the amplitude and frequency of the fourth voltage signal, and the track state includes a track occupied state or a track idle state. The method for determining the track state based on the analysis of the amplitude and frequency of the third voltage signal or the amplitude and frequency of the fourth voltage signal can refer to the relevant technology, and the present invention will not be repeated here.

[0065] In the case where the track circuit includes a 25Hz phase-sensitive track circuit or a 50Hz phase-sensitive track circuit, when it is determined that the third voltage signal and the fourth voltage signal are the same, and the voltage signal of the self-test power supply collected by the fifth acquisition circuit and the voltage signal of the self-test power supply collected by the sixth acquisition circuit are the same, it means that the acquisition is normal, so the track state can be determined based on the third voltage signal and the voltage signal of the self-test power supply collected by the fifth acquisition circuit, or based on the fourth voltage signal and the voltage signal of the self-test power supply collected by the sixth acquisition circuit; taking the third voltage signal and the voltage signal of the self-test power supply collected by the fifth acquisition circuit as an example, the amplitude, phase and frequency of the third voltage signal are analyzed, and the phase difference between the phase of the third voltage signal and the phase of the voltage signal of the self-test power supply collected by the fifth acquisition circuit is analyzed to determine the track state, which includes a track occupied state or a track idle state. The specific method for determining the track state by analyzing the amplitude, phase and frequency of the third voltage signal, and the phase difference between the phase of the third voltage signal and the phase of the voltage signal of the self-test power supply collected by the fifth acquisition circuit can refer to the relevant technology, and the present invention will not be repeated here.

[0066] In this embodiment, the automatic judgment of the track state is realized by controlling the first switch, the second switch, the third switch and the fourth switch, thereby improving the judgment efficiency of the track state; in addition, the present invention realizes the automatic judgment of the track state based on the voltage signal of the first track power supply only when the self-test of the first track power supply is ensured to pass, thereby avoiding the error caused by the fault of the first track power supply itself, thereby improving the accuracy of the track state judgment.

[0067] In one embodiment, the track circuit receiver also includes a third acquisition circuit and a fourth acquisition circuit, the third acquisition circuit has the same structure as the first acquisition circuit, the fourth acquisition circuit has the same structure as the second acquisition circuit, the input end of the third acquisition circuit and the input end of the fourth acquisition circuit are both connected to the second track power supply, the output end of the third acquisition circuit is connected to the first processor, and the output end of the fourth acquisition circuit is connected to the second processor.

[0068] For example, the present invention further includes a third acquisition circuit having the same structure as the first acquisition circuit, and a fourth acquisition circuit having the same structure as the second acquisition circuit, and the self-test of the second track power supply can be realized by the third acquisition circuit and the fourth acquisition circuit, so that the track circuit receiver can perform self-test on the two track power supplies at the same time. The self-test process of the second track power supply by the third acquisition circuit and the fourth acquisition circuit can refer to the self-test process of the first track power supply by the first acquisition circuit and the second acquisition circuit, and the present invention will not be repeated here.

[0069] In one embodiment, when the track circuit includes an AC continuous track circuit, the self-test power supply is an external power supply; when the track circuit includes a phase-sensitive track circuit, the self-test power supply is a local power supply of the phase-sensitive track circuit.

[0070] For example, when the track circuit includes an AC continuous track circuit, since the AC continuous track circuit only has a track power supply and no local power supply, when the AC continuous track circuit is detected, the self-test power supply is an external power supply, which can be a 110V, 50Hz AC power supply. When the track circuit includes a 25Hz phase-sensitive track circuit or a 50Hz phase-sensitive track circuit, since the 25Hz phase-sensitive track circuit and the 50Hz phase-sensitive track circuit have both a track power supply and a local power supply, the local power supply can be directly used as a self-test power supply without an additional self-test power supply.

[0071] In this embodiment, when the track circuit includes an AC continuous track circuit, it is necessary to connect an external power supply as a self-test power supply. When the track circuit includes a phase-sensitive track circuit, the local power supply of the phase-sensitive track circuit is used as the self-test power supply of the track power supply, which simplifies the circuit and reduces the difficulty of engineering application.

[0072] Figure 6 Schematic diagram of the overall principle of the track circuit receiver provided by the embodiment of the present invention. Figure 6 As shown, the track circuit receiver includes a first processor, a second processor, a first acquisition circuit, a second acquisition circuit, a third acquisition circuit, a fourth acquisition circuit, a fifth acquisition circuit and a sixth acquisition circuit, wherein the first processor may be integrated with a first synchronous acquisition module, and the second processor may be integrated with a second synchronous acquisition module. The first acquisition circuit includes a first impedance matching module 1, a third impedance matching module 1, a first switch 1, a second switch 1 and a first voltage acquisition module 1, wherein the first voltage acquisition module 1 includes a first voltage transformer 1 and a first signal conditioning module 1 connected thereto; the second acquisition circuit includes a second impedance matching module 1, a fourth impedance matching module 1, a third switch 1, a fourth switch 1 and a second voltage acquisition module 1, wherein the second voltage acquisition module 1 includes a second voltage transformer 1 and a second signal conditioning module 1 connected thereto.

[0073] The third acquisition circuit includes a first impedance matching module 2, a third impedance matching module 2, a first switch 2, a second switch 2 and a first voltage acquisition module 2, and the first voltage acquisition module 2 includes a first voltage transformer 2 and a first signal conditioning module 2 connected thereto; the fourth acquisition circuit includes a second impedance matching module 2, a fourth impedance matching module 2, a third switch 2, a fourth switch 2 and a second voltage acquisition module 2, and the second voltage acquisition module 2 includes a second voltage transformer 2 and a second signal conditioning module 2 connected thereto.

[0074] The fifth acquisition circuit includes a fifth switch, a fifth impedance matching module, a third voltage transformer and a third signal conditioning module connected in sequence, and the sixth acquisition circuit includes a sixth switch, a sixth impedance matching module, a fourth voltage transformer and a fourth signal conditioning module connected in sequence, the input end of the fifth impedance matching module is connected to the self-test power supply, the output end of the third signal conditioning module is connected to the first processor, the input end of the sixth impedance matching module is connected to the self-test power supply, and the output end of the fourth signal conditioning module is connected to the second processor.

[0075] Among them, since the self-test power supply outputs an AC signal of 110V, 50Hz, the input impedance of the fifth impedance matching module and the sixth impedance matching module should be 30k ohms. Figure 6 In the figure, S4 is used to represent the first switch 1, S3 is used to represent the second switch 1, S9 is used to represent the third switch 1, and S8 is used to represent the fourth switch 1; S6 is used to represent the first switch 3, S5 is used to represent the second switch 2, S11 is used to represent the third switch 2, S10 is used to represent the fourth switch 2, S1 is used to represent the fifth switch, and S7 is used to represent the sixth switch. S3 and S4 are a group, S5 and S6 are a group, S8 and S9 are a group, and S10 and S11 are a group, forming a mutually exclusive relationship. At any time point, only one is in a closed state and the other is in an open state. Taking the group of S3 and S4 as an example, S3 is in a closed state under normal conditions, and the first track power supply is connected to the system to determine the track state. When self-checking, S3 is disconnected and S4 is closed, and the self-checking power supply is connected to the system to realize self-checking of the entire system circuit.

[0076] The voltage transformer is used to convert the external high voltage signal into a low voltage signal that can be processed by the internal functional module, and realize the isolation between the internal and the external. The voltage transformer of the present invention can use a 5mA voltage transformer, that is, the maximum value of the external voltage signal is converted into a 5mA current signal through the corresponding impedance matching module, input to the voltage transformer, and the output end of the voltage transformer also outputs a 5mA current signal.

[0077] The above-mentioned signal conditioning module is used to convert the signal output by the voltage transformer into a signal suitable for the range of the synchronous acquisition module, and the synchronous acquisition module is a synchronous acquisition analog-to-digital conversion module. Here, since the impedance matching module, voltage transformer, etc. at the front end process the different signals input by the front end into the same signal, all signal conditioning modules are the same.

[0078] The above-mentioned synchronous acquisition module is used to convert analog signals into digital signals. For the 25Hz phase-sensitive track circuit and the 50Hz phase-sensitive track circuit, because the phase difference between the first track power supply and the self-test power supply needs to be calculated, it is necessary to ensure that the analog signals are collected simultaneously, so a synchronous acquisition analog-to-digital conversion module is used here. The use of two synchronous acquisition analog-to-digital conversion modules means that each synchronous acquisition analog-to-digital conversion module works independently and sends the data value to the specified target processor.

[0079] The processor is used for data collection, processing, external output of track circuit status judgment and result output of the entire track circuit receiver; two processing modules are used, indicating that the track circuit receiver is two-out-of-two, and there is data communication between the two processors.

[0080] The track circuit receiver provided by the embodiment of the present invention can realize closed-loop self-test of the entire acquisition circuit, which can greatly improve the safety of track circuit detection. The local power supply of the phase-sensitive track circuit is used as the self-test power supply. Through the impedance matching module and the switch switching, when the circuit is self-tested, the self-test power supply is connected to the corresponding acquisition circuit to realize self-test; when the track state is judged, the track power supply is connected to the corresponding acquisition circuit to realize the judgment of the track state, which simplifies the circuit design. When used for 25Hz and 50Hz phase-sensitive track circuits, no additional self-test power supply is required. When used for AC continuous track circuits, an additional external power supply needs to be introduced as a self-test power supply, but the phase-sensitive track circuit is consistent with the AC continuous track circuit, thereby simplifying the circuit design and unifying the use methods of various track circuit receivers, which is beneficial to engineering applications and daily maintenance.

[0081] The track circuit detection method provided by the embodiment of the present invention comprises the following steps: A first voltage signal sent by a first voltage acquisition module and a second voltage signal sent by a second voltage acquisition module are received, wherein the first voltage signal is obtained after the first impedance matching module converts the voltage signal of the self-test power supply, and the second voltage signal is obtained after the second impedance matching module converts the voltage signal of the self-test power supply.

[0082] Based on the first voltage signal and the second voltage signal, a self-check is performed on the track circuit.

[0083] In the track circuit detection method provided by the embodiment of the present invention, the track circuit receiver used collects the voltage signal of the self-test power supply through different first impedance matching modules and second impedance matching modules, and then performs self-test on the track circuit based on the collected first voltage signal and second voltage signal. The settings of the first impedance matching module and the second impedance matching module are independent of the type of track circuit, and therefore can be adapted to different types of track circuits, thereby improving the versatility of the track circuit receiver.

[0084] In one embodiment, the self-checking of the track circuit based on the first voltage signal and the second voltage signal can be implemented in the following manner: When it is determined that the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal is a second preset value, and when it is determined that the difference between the phase of the first voltage signal and the phase of the second voltage signal is a first preset value, it is determined that the first track power supply self-test has passed; the second preset value is the ratio of the second preset impedance value to the first preset impedance value, the second preset impedance value is the sum of the impedance value of the second impedance matching module and the impedance value of the fourth impedance matching module, and the first preset impedance value is the sum of the impedance value of the first impedance matching module and the impedance value of the third impedance matching module; the first preset value is the difference between the phase of the voltage output by the first impedance matching module and the phase of the voltage output by the second impedance matching module.

[0085] In one embodiment, the track circuit detection method further includes the following steps: When the self-test power supply works normally, the first switch and the third switch are controlled to be closed, and the second switch and the fourth switch are controlled to be opened.

[0086] In one embodiment, the track circuit detection method further includes the following steps: When the first track power supply passes the self-test, controlling the second switch and the fourth switch to be closed, and controlling the first switch and the third switch to be opened; In the case where the track circuit includes an AC continuous track circuit, the track state is determined based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal; the third voltage signal is obtained after the third impedance matching module converts the voltage signal of the first track power supply, and the fourth voltage signal is obtained after the fourth impedance matching module converts the voltage signal of the first track power supply; Where the track circuit comprises a phase sensitive track circuit, the track state is determined based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, and the phase of the third voltage signal and the phase of the fourth voltage signal.

[0087] Figure 7FIG. 1 is a flow chart of a detection method for an AC continuous track circuit provided by an embodiment of the present invention. Figure 7 As shown, the first processor and the second processor simultaneously collect the voltage signal of the self-test power supply through the fifth collection circuit and the sixth collection circuit respectively. When it is determined that the amplitude and frequency of the voltage signal of the self-test power supply collected by the first processor are different from the amplitude and frequency of the voltage signal of the self-test power supply collected by the second processor in at least one item, it is determined that the collection circuit for collecting the voltage signal of the self-test power supply is abnormal, and an alarm signal is output; when it is determined that the amplitude and frequency of the voltage signal of the self-test power supply collected by the first processor are the same as the amplitude and frequency of the voltage signal of the self-test power supply collected by the second processor, it is determined that the collection circuit for collecting the voltage signal of the self-test power supply is normal; at this time, the control switch is switched to the self-test position, and the first processor and the second processor simultaneously collect the voltage signal of the self-test power supply through the first collection circuit and the second collection circuit respectively, determine the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal, the difference between the phase of the second voltage signal and the phase of the first voltage signal, and the frequency of the first voltage signal and the frequency of the second voltage signal, determine whether the self-test is passed based on the amplitude ratio, the phase difference and the frequency, and output an alarm signal when the self-test fails.

[0088] When the self-test passes, the control switch is connected to the first track power supply, and the first processor and the second processor simultaneously collect the voltage signal of the first track power supply through the first acquisition circuit and the second acquisition circuit respectively, determine the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, and the frequency of the third voltage signal and the frequency of the fourth voltage signal obtained, and determine the track state based on the analysis of the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, and the frequency of the third voltage signal and the frequency of the fourth voltage signal.

[0089] Figure 8 FIG. 1 is a flow chart of a detection method for a phase-sensitive track circuit provided by an embodiment of the present invention. Figure 8As shown, the first processor and the second processor simultaneously collect the voltage signal of the self-test power supply through the fifth collection circuit and the sixth collection circuit respectively. When it is determined that the amplitude and frequency of the voltage signal of the self-test power supply collected by the first processor are different from the amplitude and frequency of the voltage signal of the self-test power supply collected by the second processor in at least one item, it is determined that the collection circuit for collecting the voltage signal of the self-test power supply is abnormal, and an alarm signal is output; when it is determined that the amplitude and frequency of the voltage signal of the self-test power supply collected by the first processor are the same as the amplitude and frequency of the voltage signal of the self-test power supply collected by the second processor, it is determined that the collection circuit for collecting the voltage signal of the self-test power supply is normal; at this time, the control switch is switched to the self-test position, and the first processor and the second processor simultaneously collect the voltage signal of the self-test power supply through the first collection circuit and the second collection circuit respectively, determine the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal, the difference between the phase of the second voltage signal and the phase of the first voltage signal, and the frequency of the first voltage signal and the frequency of the second voltage signal, determine whether the self-test is passed based on the amplitude ratio, the phase difference and the frequency, and output an alarm signal when the self-test fails.

[0090] When the self-test passes, the control switch is connected to the first track power supply, and the first processor and the second processor simultaneously collect the voltage signal of the first track power supply through the first acquisition circuit and the second acquisition circuit respectively, determine the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, the phase of the third voltage signal and the phase of the fourth voltage signal, the frequency of the third voltage signal and the frequency of the fourth voltage signal, and the phase difference between the phase of the voltage signal of the first track power supply and the voltage signal of the self-test power supply, and determine the track state based on the analysis of the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, the phase of the third voltage signal and the phase of the fourth voltage signal, the frequency of the third voltage signal and the frequency of the fourth voltage signal, and the phase difference.

[0091] The detection device for the track circuit provided by the present invention is described below. The detection device for the track circuit described below and the detection method for the track circuit described above can be referred to each other.

[0092] Fig. 9 is a schematic diagram of the structure of a detection device for a track circuit provided by an embodiment of the present invention, such as Fig. 9 As shown, the track circuit detection device 900 includes a receiving unit 901 and a self-test unit 902; wherein: The receiving unit 901 is used to receive a first voltage signal sent by the first voltage acquisition module and a second voltage signal sent by the second voltage acquisition module, wherein the first voltage signal is obtained by converting the voltage signal of the self-test power supply by the first impedance matching module, and the second voltage signal is obtained by converting the voltage signal of the self-test power supply by the second impedance matching module; The self-checking unit 902 is used to perform a self-check on the track circuit based on the first voltage signal and the second voltage signal.

[0093] Based on any of the above embodiments, the self-checking unit 902 is specifically used for: When it is determined that the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal is a second preset value, and when it is determined that the difference between the phase of the first voltage signal and the phase of the second voltage signal is a first preset value, it is determined that the first track power supply self-test has passed; the second preset value is the ratio of the second preset impedance value to the first preset impedance value, the second preset impedance value is the sum of the impedance value of the second impedance matching module and the impedance value of the fourth impedance matching module, and the first preset impedance value is the sum of the impedance value of the first impedance matching module and the impedance value of the third impedance matching module; the first preset value is the difference between the phase of the voltage output by the first impedance matching module and the phase of the voltage output by the second impedance matching module.

[0094] Based on any of the above embodiments, the track circuit detection device 900 further includes: The first control unit is used to control the first switch and the third switch to be closed, and control the second switch and the fourth switch to be opened when the self-test power supply works normally.

[0095] Based on any of the above embodiments, the track circuit detection device 900 further includes: a second control unit, configured to control the second switch and the fourth switch to be closed, and control the first switch and the third switch to be opened, when the first track power supply self-test passes; a first determining unit, configured to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal when the track circuit includes an AC continuous track circuit; the third voltage signal is obtained by converting the voltage signal of the first track power supply by the third impedance matching module, and the fourth voltage signal is obtained by converting the voltage signal of the first track power supply by the fourth impedance matching module; The second determination unit is used to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, and the phase of the third voltage signal and the phase of the fourth voltage signal when the track circuit includes a phase-sensitive track circuit.

[0096] Fig.10 is a schematic diagram of the physical structure of a track circuit receiver provided by an embodiment of the present invention, such as Fig.10As shown, the track circuit receiver may include: a processor 1010, a communication interface 1020, a memory 1030 and a communication bus 1040, wherein the processor 1010, the communication interface 1020 and the memory 1030 communicate with each other through the communication bus 1040. The processor 1010 may call the logic instructions in the memory 1030 to execute the detection method of the track circuit, the method comprising: receiving a first voltage signal sent by a first voltage acquisition module and a second voltage signal sent by a second voltage acquisition module, the first voltage signal being obtained by converting the voltage signal of the self-test power supply by the first impedance matching module, and the second voltage signal being obtained by converting the voltage signal of the self-test power supply by the second impedance matching module; Based on the first voltage signal and the second voltage signal, a self-check is performed on the track circuit.

[0097] In addition, the logic instructions in the above-mentioned memory 1030 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, 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, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0098] On the other hand, the present invention further provides a computer program product, the computer program product includes a computer program, the computer program can be stored in a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute the track circuit detection method provided by the above methods, the method comprising: receiving a first voltage signal sent by a first voltage acquisition module and a second voltage signal sent by a second voltage acquisition module, the first voltage signal is obtained by converting the voltage signal of the self-test power supply by the first impedance matching module, and the second voltage signal is obtained by converting the voltage signal of the self-test power supply by the second impedance matching module; Based on the first voltage signal and the second voltage signal, a self-check is performed on the track circuit.

[0099] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the detection method of the track circuit provided by the above methods is implemented, the method comprising: receiving a first voltage signal sent by a first voltage acquisition module and a second voltage signal sent by a second voltage acquisition module, the first voltage signal being obtained by converting a voltage signal of a self-test power supply by a first impedance matching module, and the second voltage signal being obtained by converting a voltage signal of the self-test power supply by a second impedance matching module; Based on the first voltage signal and the second voltage signal, a self-check is performed on the track circuit.

[0100] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0101] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A track circuit receiver, characterized in that: The invention comprises a first processor, a second processor, a first acquisition circuit and a second acquisition circuit; the first acquisition circuit comprises a first impedance matching module and a first voltage acquisition module, the second acquisition circuit comprises a second impedance matching module and a second voltage acquisition module, the input end of the first impedance matching module and the input end of the second impedance matching module are both connected to a self-test power supply, the output end of the first impedance matching module is connected to the first processor through the first voltage acquisition module, and the output end of the second impedance matching module is connected to the second processor through the second voltage acquisition module; The first impedance matching module is different from the second impedance matching module; The first impedance matching module is used to convert the voltage signal of the self-test power supply, and send the first voltage signal obtained after the conversion to the first processor through the first voltage acquisition module; The second impedance matching module is used to convert the voltage signal of the self-test power supply, and send the second voltage signal obtained after the conversion to the second processor through the second voltage acquisition module; A target processor is used to perform self-inspection on the track circuit based on the first voltage signal and the second voltage signal, and the target processor includes the first processor or the second processor.

2. The track circuit receiver according to claim 1, characterized in that: The first impedance matching module includes a first capacitor, a first resistor, and a second resistor. The first end of the first capacitor and the first end of the first resistor are both connected to the self-test power supply, the second end of the first capacitor is connected to the first voltage acquisition module through the second resistor, and the second end of the first resistor is connected to the first voltage acquisition module.

3. The track circuit receiver according to claim 2, characterized in that: The second impedance matching module includes a second capacitor, a third resistor and a fourth resistor, the first end of the third resistor and the first end of the fourth resistor are both connected to the self-test power supply, the second end of the third resistor is respectively connected to the first end of the second capacitor and the second voltage acquisition module, and the second end of the fourth resistor is respectively connected to the second end of the second capacitor and the second voltage acquisition module; the difference between the phase of the voltage output by the first impedance matching module and the phase of the voltage output by the second impedance matching module is a first preset value.

4. The track circuit receiver according to claim 3, characterized in that: The first acquisition circuit further includes a third impedance matching module, and the second acquisition circuit includes a fourth impedance matching module, wherein the input end of the third impedance matching module is respectively connected to the first track power supply and the output end of the first impedance matching module, and the output end of the third impedance matching module is connected to the first voltage acquisition module; the input end of the fourth impedance matching module is respectively connected to the first track power supply and the output end of the second impedance matching module, and the output end of the fourth impedance matching module is connected to the second voltage acquisition module; The sum of the impedance value of the first impedance matching module and the impedance value of the third impedance matching module is a first preset impedance value, and the sum of the impedance value of the second impedance matching module and the impedance value of the fourth impedance matching module is a second preset impedance value.

5. The track circuit receiver according to claim 4, characterized in that: The target processor is specifically used to determine that the first rail power supply self-test has passed when it is determined that the ratio of the amplitude of the first voltage signal to the amplitude of the second voltage signal is a second preset value, and when it is determined that the difference between the phase of the first voltage signal and the phase of the second voltage signal is the first preset value; the second preset value is the ratio of the second preset impedance value to the first preset impedance value.

6. The track circuit receiver according to claim 4, characterized in that: The first acquisition circuit further includes a first switch and a second switch, and the second acquisition circuit further includes a third switch and a fourth switch, the output end of the first impedance matching module is connected to the input end of the third impedance matching module through the first switch, and the first track power supply is connected to the input end of the third impedance matching module through the second switch; the output end of the second impedance matching module is connected to the input end of the fourth impedance matching module through the third switch, and the first track power supply is connected to the input end of the fourth impedance matching module through the fourth switch; The target processor is further configured to control the first switch and the third switch to be closed, and control the second switch and the fourth switch to be opened, when the acquisition circuit for acquiring the voltage signal of the self-test power supply works normally.

7. The track circuit receiver according to claim 6, characterized in that: The target processor is further configured to control the second switch and the fourth switch to be closed, and control the first switch and the third switch to be opened, when the first track power supply self-test passes; The third impedance matching module is used to convert the voltage signal of the first track power supply, and send the third voltage signal obtained after the conversion to the first processor through the first voltage acquisition module; The fourth impedance matching module is used to convert the voltage signal of the first track power supply, and send the fourth voltage signal obtained after the conversion to the second processor through the second voltage acquisition module; The target processor is further configured to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal when the track circuit includes an AC continuous track circuit; The target processor is further used to determine the track state based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, the phase of the third voltage signal and the phase of the fourth voltage signal, and the phase of the voltage signal of the first track power supply and the phase of the voltage signal of the self-test power supply when the track circuit includes a phase-sensitive track circuit.

8. The track circuit receiver according to any one of claims 1 to 7, characterized in that: It also includes a third acquisition circuit and a fourth acquisition circuit. The third acquisition circuit has the same structure as the first acquisition circuit, and the fourth acquisition circuit has the same structure as the second acquisition circuit. The input end of the third acquisition circuit and the input end of the fourth acquisition circuit are both connected to the second track power supply, the output end of the third acquisition circuit is connected to the first processor, and the output end of the fourth acquisition circuit is connected to the second processor.

9. The track circuit receiver according to any one of claims 1 to 7, characterized in that: When the track circuit includes an AC continuous track circuit, the self-test power supply is an external power supply; when the track circuit includes a phase-sensitive track circuit, the self-test power supply is a local power supply of the phase-sensitive track circuit.

10. A method for detecting a track circuit, characterized in that: Applied to the track circuit receiver according to any one of claims 1 to 9, the method comprising: Receive a first voltage signal sent by a first voltage acquisition module and a second voltage signal sent by a second voltage acquisition module, wherein the first voltage signal is obtained by converting the voltage signal of the self-test power supply by the first impedance matching module, and the second voltage signal is obtained by converting the voltage signal of the self-test power supply by the second impedance matching module; Based on the first voltage signal and the second voltage signal, a self-check is performed on the track circuit.

11. The method for detecting a track circuit according to claim 10, characterized in that: The self-checking of the track circuit based on the first voltage signal and the second voltage signal includes: When it is determined that the ratio of the amplitude of the second voltage signal to the amplitude of the first voltage signal is a second preset value, and when it is determined that the difference between the phase of the first voltage signal and the phase of the second voltage signal is a first preset value, it is determined that the first rail power supply self-test has passed; the second preset value is the ratio of the second preset impedance value to the first preset impedance value, the second preset impedance value is the sum of the impedance value of the second impedance matching module and the impedance value of the fourth impedance matching module, and the first preset impedance value is the sum of the impedance value of the first impedance matching module and the impedance value of the third impedance matching module; the first preset value is the difference between the phase of the voltage output by the first impedance matching module and the phase of the voltage output by the second impedance matching module.

12. The method for detecting a track circuit according to claim 10, characterized in that: The method further comprises: When the self-test power supply works normally, the first switch and the third switch are controlled to be closed, and the second switch and the fourth switch are controlled to be opened.

13. The method for detecting a track circuit according to claim 12, characterized in that: The method further comprises: When the first track power supply passes the self-test, controlling the second switch and the fourth switch to be closed, and controlling the first switch and the third switch to be opened; In the case where the track circuit includes an AC continuous track circuit, the track state is determined based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal; the third voltage signal is obtained after the third impedance matching module converts the voltage signal of the first track power supply, and the fourth voltage signal is obtained after the fourth impedance matching module converts the voltage signal of the first track power supply; Where the track circuit comprises a phase sensitive track circuit, the track state is determined based on the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, and the phase of the third voltage signal and the phase of the fourth voltage signal.

14. A detection device for a track circuit, characterized in that: include: A receiving unit, used to receive a first voltage signal sent by the first voltage acquisition module and a second voltage signal sent by the second voltage acquisition module, wherein the first voltage signal is obtained by converting the voltage signal of the self-test power supply by the first impedance matching module, and the second voltage signal is obtained by converting the voltage signal of the self-test power supply by the second impedance matching module; A self-check unit is used to perform a self-check on the track circuit based on the first voltage signal and the second voltage signal.

15. A track circuit receiver, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the track circuit detection method according to any one of claims 10 to 13 is implemented.

16. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the track circuit detection method according to any one of claims 10 to 13 is implemented.

17. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the track circuit detection method according to any one of claims 10 to 13 is implemented.

Images