Test system for digital track circuit system and digital control equipment of station

Abstract

The invention provides a station digital track circuit system and a test system of digital control equipment. The test system of the digital control equipment comprises an upper computer and an auxiliary test unit, the upper computer is connected to the digital control equipment through the auxiliary test unit, the upper computer is matched with the auxiliary test unit to realize the function test of the electrical indexes of the digital control equipment, and the function test of the electrical indexes of the digital control equipment comprises at least one of a voltage test, a frequency test, a threshold test and a response test. According to the test system of the digital control equipment provided by the invention, the function test of the electrical indexes of the digital control equipment can be realized, so that the safety and reliability of a station digital track circuit system using the equipment can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of power electronics, and in particular to a test system for a digital track circuit system and digital control equipment of a station. Background Art

[0002] The station digital track circuit system is based on the actual situation of the 25Hz track circuit superimposed on the ZPW-2000 electronic coding of my country's conventional railways and the integrated ZPW-2000 track circuit of high-speed railways. It is a new type of track circuit system developed through system intensification, structural miniaturization and equipment digitization. It is suitable for conventional and high-speed railway stations, and meets both communication and relay coding and status output modes.

[0003] The digital control device is the core device of the station's digital track circuit system, and is used to realize the key functions of the station's digital track circuit system. Among them, the digital control board of the digital control device is mainly used to realize the sending and receiving functions. Among them, the digital control board receives the coding conditions issued by the control device, and can generate high-precision and high-stability frequency-shift signals with 8 carrier frequencies and 18 low frequencies, and self-detect the generated frequency-shift signals. It can also drive the direction switching relays in the redundant switching board according to the direction information forwarded by the communication interface board; in addition, the digital control board can also demodulate the two receiving end frequency-shift signals at the same time. When any receiving end outputs the occupied status, the external total track relay is activated and the total track occupancy status information is uploaded to the communication interface board through the CAND / E bus.

[0004] In this regard, the inventors have found through research that in order to ensure the safety and reliability of the station's digital track circuit system, it is necessary to test the digital control equipment before putting it into use. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a testing system for a station digital track circuit system and a digital control device, which can realize functional testing of electrical indicators of the digital control device, thereby ensuring the safety and reliability of the station digital track circuit system using the device.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of the present invention discloses a test system for a digital control device, comprising: a host computer and an auxiliary test unit;

[0008] The host computer is connected to the digital control device through the auxiliary test unit. The host computer cooperates with the auxiliary test unit to implement functional testing of the electrical indicators of the digital control device. The functional testing of the electrical indicators of the digital control device includes: at least one of voltage testing, frequency testing, threshold testing, and response testing.

[0009] Optionally, the test system of the digital control device described above further includes: a power supply unit, wherein the power supply unit is provided with a power supply voltage monitoring meter for supplying power to the auxiliary test unit and / or the host computer.

[0010] Optionally, in the above-mentioned test system for digital control equipment, the auxiliary test unit includes: an operation control unit, a DC measurement unit, an AC measurement unit, a communication unit, a signal generator unit, a time measurement unit and a relay array unit;

[0011] The operation control unit is used to control at least one action of the DC measurement unit, the AC measurement unit, the communication unit, the signal generator unit, the time measurement unit and the relay array unit according to the instructions sent by the host computer, so as to realize the functional test of the electrical indicators of the digital control device and feed back the test results to the host computer.

[0012] Optionally, in the above-mentioned test system for the digital control device, the DC measurement unit includes: a first operational amplifier circuit, a first AD converter, a first voltage reference circuit and a first digital isolator;

[0013] The input end of the first operational amplifier circuit serves as the input end of the DC measurement unit and is respectively connected to the terminal of the device under test, the track relay and the alarm relay;

[0014] The output end of the first operational amplifier circuit is connected to the first input end of the first AD converter, the output end of the first voltage reference circuit is connected to the second input end of the first AD converter, the output end of the first AD converter is connected to the input end of the first digital isolator, and the output end of the first digital isolator serves as the output end of the DC measurement unit and is connected to the operation control unit.

[0015] Optionally, in the above-mentioned test system for digital control equipment, the AC measurement module includes: a second operational amplifier circuit, a second AD converter, a second voltage reference circuit and a second digital isolator;

[0016] The input end of the second operational amplifier circuit is used as the input end of the AC measurement unit and is connected to the terminal of the device under test;

[0017] The output end of the second operational amplifier circuit is connected to the first input end of the second AD converter, the output end of the second voltage reference circuit is connected to the second input end of the second AD converter, the output end of the second AD converter is connected to the input end of the second digital isolator, and the output end of the second digital isolator serves as the output end of the AC measurement unit and is connected to the operation control unit.

[0018] Optionally, in the above-mentioned test system for digital control equipment, the communication unit comprises: a first communication subunit and a second communication subunit;

[0019] The first communication subunit is connected to the terminals of the device under test and the operation control unit respectively, and the second communication subunit is connected to the relay array unit and the operation control unit respectively.

[0020] Optionally, in the above-mentioned test system for digital control equipment, the signal generator unit includes: a third digital isolator, a DA converter, a third voltage reference circuit, a third operational amplifier circuit and a low-pass filter unit;

[0021] The input end of the third digital isolator serves as the input end of the signal generator unit and is connected to the main control operation unit; the output end of the third digital isolator is connected to the first input end of the DA converter, the output end of the third voltage reference circuit is connected to the second input end of the DA converter, the output end of the DA converter is connected to the input end of the low-pass filter unit through the third operational amplifier circuit, and the output end of the low-pass filter unit serves as the output end of the signal generator unit.

[0022] Optionally, in the above-mentioned test system of the digital control device, the time measurement unit includes: a main control operation unit, and the main control operation unit is connected to the track relay and the alarm relay respectively.

[0023] Optionally, in the above-mentioned test system for digital control equipment, the relay array unit comprises: a relay unit, a fourth digital isolator, a relay driver, a CPU unit and a communication subunit;

[0024] The input end of the communication subunit is connected to the operation control unit as the input end of the relay array unit; the output end of the relay unit is connected to the terminal of the device under test as the output end of the relay array unit.

[0025] The second aspect of the present invention discloses a station digital track circuit system, wherein the digital control device in the station digital track circuit system can be subjected to electrical index function testing by a testing system for any digital control device disclosed in the first aspect.

[0026] The test system for digital control equipment provided based on the above-mentioned embodiment of the present invention includes: a host computer and an auxiliary test unit; the host computer is connected to the digital control equipment through the auxiliary test unit, and the host computer cooperates with the auxiliary test unit to realize functional testing of electrical indicators of the digital control equipment. The functional testing of electrical indicators of the digital control equipment includes: at least one of voltage testing, frequency testing, threshold testing, and response testing. That is, the test system for digital control equipment provided by the present application can realize functional testing of electrical indicators of digital control equipment, thereby ensuring the safety and reliability of the digital track circuit system of the station using the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 A structural schematic diagram of a test system for a digital control device provided in this application;

[0029] Figure 2 A schematic diagram of the structure of an auxiliary test unit provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a DC measurement unit provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of an AC measurement unit provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the structure of a communication unit provided in an embodiment of the present application;

[0033] Figure 6 A schematic diagram of the structure of a signal generator unit provided in an embodiment of the present application;

[0034] Figure 7 A schematic diagram of the structure of a time measurement unit provided in an embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure of a relay array unit provided in an embodiment of the present application;

[0036] Fig. 9 A schematic diagram of the structure of another digital control device testing system provided in an embodiment of the present application;

[0037] Fig.10 A schematic diagram of the structure of a power supply unit provided in an embodiment of the present application;

[0038] Fig.11 A schematic diagram of the structure of another digital control device testing system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0040] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0041] First of all, it should be noted that the digital control equipment in the station digital track circuit system is a new equipment developed for actual application needs. Currently, there is no corresponding testing system for this type of equipment. In this regard, an embodiment of the present invention provides a testing system for the station digital track circuit system and digital control equipment, which can realize functional testing of the electrical indicators of the digital control equipment, thereby ensuring the safety and reliability of the station digital track circuit system using the equipment.

[0042] See also Figure 1 The test system of the digital control device mainly includes: a host computer (101 in the figure) and an auxiliary test unit (102 in the figure).

[0043] Among them, the host computer is connected to the digital control device through an auxiliary test unit. The host computer cooperates with the auxiliary test unit to realize the functional test of the electrical indicators of the digital control device. The functional test of the electrical indicators of the digital control device includes: at least one of voltage test, frequency test, threshold test and response test.

[0044] In actual applications, the host computer can be used to send test instructions and display test results.

[0045] In some embodiments, Figure 2As shown, the auxiliary test unit may include: an operation control unit (1021 in the figure), a DC measurement unit (1022 in the figure), an AC measurement unit (1023 in the figure), a communication unit (1024 in the figure), a signal generator unit (1025 in the figure), a time measurement unit (1026 in the figure) and a relay array unit (1027 in the figure).

[0046] Among them, the operation control unit is used to control at least one action of the DC measurement unit, the AC measurement unit, the communication unit, the signal generator unit, the time measurement unit and the relay array unit according to the instructions sent by the host computer, so as to realize the functional test of the electrical indicators of the digital control device and feed back the test results to the host computer.

[0047] like Figure 3 As shown, in some embodiments, the DC measurement unit may include: a first operational amplifier circuit (201 in the figure), a first AD converter (202 in the figure), a first voltage reference circuit (203 in the figure) and a first digital isolator (204 in the figure).

[0048] Among them, the input end of the first operational amplifier circuit serves as the input end of the DC measurement unit, and is respectively connected to the terminal of the device under test, the track relay and the alarm relay; the output end of the first operational amplifier circuit is connected to the first input end of the first AD converter, the output end of the first voltage reference circuit is connected to the second input end of the first AD converter, the output end of the first AD converter is connected to the input end of the first digital isolator, and the output end of the first digital isolator serves as the output end of the DC measurement unit and is connected to the operation control unit.

[0049] It should be noted that in actual applications, the DC measurement unit can be used to test the power supply, alarm relay, track relay and working current of the device under test, where the device under test can be a digital control device.

[0050] like Figure 4 As shown, in some embodiments, the AC measurement unit may include: a second operational amplifier circuit (301 in the figure), a second AD converter (302 in the figure), a second voltage reference circuit (303 in the figure) and a second digital isolator (304 in the figure).

[0051] Among them, the input end of the second operational amplifier circuit serves as the input end of the AC measurement unit and is connected to the terminal of the device under test; the output end of the second operational amplifier circuit is connected to the first input end of the second AD converter, the output end of the second voltage reference circuit is connected to the second input end of the second AD converter, the output end of the second AD converter is connected to the input end of the second digital isolator, and the output end of the second digital isolator serves as the output end of the AC measurement unit and is connected to the operation control unit.

[0052] It should be noted that in actual applications, the AC measurement unit can be divided into two parts according to the functions, one is the sending part and the other is the receiving and collecting part. Among them, the sending part can be used to test the output voltage, carrier frequency, low frequency, up and down frequency conversion and waveform distortion at different levels; the receiving and collecting part can detect the signal voltage and frequency output by the signal generator unit.

[0053] like Figure 5 As shown, in some embodiments, the communication unit may include: a first communication subunit (401 in the figure) and a second communication subunit (402 in the figure).

[0054] The first communication subunit is respectively connected to the terminals of the device under test and the operation control unit, and the second communication subunit is respectively connected to the relay array unit and the operation control unit.

[0055] Specifically, the communication mode of the first communication subunit can be CAN communication, and the communication mode of the second communication subunit can be 485 communication; of course, it is not limited to this, and can also be determined according to the specific application environment and user needs. This application does not limit it and it is within the protection scope of this application.

[0056] It should be noted that the terminal of the device under test connected to the first communication subunit may be a monitoring information terminal of the device under test. The connection between the first communication subunit and the second communication subunit and each device or unit may be through an interface circuit and a digital isolator.

[0057] It should also be noted that in practice, the first communication subunit can support two communication channels, interact with device information through two CAN communications, send synchronization frames and coded frames, and receive monitoring information uploaded by the device. The monitoring information includes analog and digital quantities. The second communication subunit can support one communication channel, which can be switched by controlling the relay array unit through one 485 communication channel.

[0058] like Figure 6 As shown, in some embodiments, the signal generator unit may include: a third digital isolator (501 in the figure), a DA converter (502 in the figure), a third voltage reference circuit (503 in the figure), a third operational amplifier circuit (504 in the figure) and a low-pass filtering unit (505 in the figure).

[0059] Among them, the input end of the third digital isolator serves as the input end of the signal generator unit and is connected to the main control operation unit; the output end of the third digital isolator is connected to the first input end of the DA converter, the output end of the third voltage reference circuit is connected to the second input end of the DA converter, the output end of the DA converter is connected to the input end of the low-pass filter unit through the third operational amplifier circuit, and the output end of the low-pass filter unit serves as the output end of the signal generator unit.

[0060] In practical applications, the signal generator simulation unit can simulate the input 2FSK (Frequency-shift keying) signal required for equipment testing with 2 voltages in the range of 0V to 7V.

[0061] It should be noted that the main control operation unit is mainly a logic conversion unit in the time measurement unit, which is used to read the relay state at a fixed time. The operation control unit is used to control other units in each auxiliary test unit to realize the interaction between other units in each auxiliary test unit and the host computer.

[0062] like Figure 7 As shown, in some embodiments, the time measurement unit may include: a main control operation unit (601 in the figure), and the main control operation unit is connected to the track relay and the alarm relay respectively.

[0063] In practical applications, the main control unit can be used to read the status of the track relay and the alarm relay regularly, so as to test their suction and drop time. Specifically, the alarm relay and the track relay can be tested by timing the status of the alarm relay and the track relay.

[0064] like Figure 8 As shown, in some embodiments, the relay array unit may include: a relay unit (701 in the figure), a fourth digital isolator (702 in the figure), a relay driver (703 in the figure), a CPU unit (704 in the figure) and a communication subunit (705 in the figure).

[0065] The input end of the communication subunit is connected to the operation control unit as the input end of the relay array unit; the output end of the relay unit is connected to the terminal of the device under test as the output end of the relay array unit.

[0066] In practical applications, relay switching in the relay array unit can be controlled according to test requirements, thereby establishing different scenario control conditions. Among them, the terminal selection of the device under test and the on-off between different terminals are generally different in different test environments.

[0067] It should be noted that the communication method supported by the communication unit may be 485 communication; of course, it is not limited thereto, and may also be determined depending on the specific application environment and user needs. This application does not limit this, and all are within the protection scope of this application.

[0068] Optionally, in some embodiments, Fig. 9 As shown, the test system of the digital control device may further include: a power supply unit (103 in the figure), wherein the power supply unit is provided with a power supply voltage monitoring meter for supplying power to the auxiliary test unit and / or the host computer.

[0069] Among them, the power supply voltage monitoring table PID dynamically adjusts and controls the different voltage values ​​required by the DC power supply output device to complete the power supply of various functional units, relays and digital control devices. The specific structure of the power supply can be as follows Fig.10 shown.

[0070] It should be noted that the power supply unit can be arranged outside the auxiliary test unit, or can be integrated into the auxiliary test unit (ie Fig.11 As shown), it can be determined according to the application environment and user needs, and is within the protection scope of this application.

[0071] In actual applications, the voltage test may include at least one of the alarm relay pickup voltage, the track relay pickup voltage, the output voltage of the digital control device, the output voltage of the digital control device and the track relay pickup voltage; of course, it is not limited to this, and can also be determined according to the specific application environment and user needs, all within the protection scope of this application.

[0072] The frequency test may include at least one of the low frequency of the digital control device under various carrier frequency conditions and the carrier frequency under all low frequency conditions; of course, it is not limited to this, and can also be determined according to the specific application environment and user needs, all within the scope of protection of this application.

[0073] The threshold test may include at least one of the track relay pickup threshold, the track relay drop threshold, the digital control device pickup threshold and the digital control device drop threshold; of course, it is not limited to this, and can also be determined according to the specific application environment and user needs, all within the protection scope of this application.

[0074] The response test may include at least one of the track relay pickup time, the track relay drop time, the track relay state response, and the digital control device frequency shift signal response; of course, it is not limited to this, and can also be determined according to the specific application environment and user needs, all within the protection scope of this application.

[0075] Combined with the test system of the above digital control equipment, the test process in actual application can be specifically as follows:

[0076] According to the definition of external terminals of digital control equipment, the corresponding frequency configuration terminal is selected through the relay array unit to set the carrier low frequency: under the conditions of output first-level level, low frequency 20.2Hz, and carrier frequency 2001.4Hz, the alarm relay pickup voltage value is tested by the DC measurement unit.

[0077] The carrier frequency and low frequency conditions of the digital control device are changed, and the low frequency value of the digital control device under all carrier frequency conditions and the carrier frequency value under all low frequency conditions are tested by the AC measurement unit.

[0078] The low frequency of 20.2Hz and the carrier frequency of 1701.4Hz were selected, and the output voltage values ​​under different power level conditions were tested by the AC measurement unit; among them, the level selection of the power level adjustment can be realized by controlling the digital control device terminals through the relay array unit.

[0079] Select the first-level level, low frequency of 20.2Hz, and carrier frequency of 2001.4Hz. When channel 1 is closed and channel 2 is normal; channel 1 is normal and channel 2 is closed; channel 1 and channel 2 are closed at the same time, test the alarm relay voltage value when it is set as the main transmission; test the output carrier frequency and low frequency value, output voltage value, and alarm relay voltage value when it is set as the standby transmission.

[0080] Adjust the signal generator unit to gradually reduce the input signal voltage of the equipment. When the track relay falls, test the input signal amplitude, and the test value is the drop threshold. Change the external conditions to control the carrier frequency and low frequency of the equipment, and test the equipment's drop threshold for all carrier frequencies and all low-frequency signals.

[0081] Adjust the signal generator unit so that the input signal voltage of the equipment is the reliable working value of the equipment, turn on the switch, and when the track relay is attracted, the stopwatch reading is the attraction delay time; turn off the switch, and when the track relay falls, the stopwatch reading is the fall delay time.

[0082] Set the carrier frequency type to 1701.4Hz and low frequency to 10.3Hz, the default carrier frequency of the equipment track is set to 1701.4Hz, the equipment is in normal working condition, and the main and parallel track relays are energized; when channel 1 is closed and channel 2 is normal, channel 1 is normal and channel 2 is closed, and channel 1 and channel 2 are closed at the same time, the main and parallel track relays should remain energized; or, set the carrier frequency type to 1701.4Hz and low frequency to 10.3Hz, the default carrier frequency of the equipment track is set to 1700Hz, the equipment is in normal working condition, and the main and parallel track relays are energized; when channel 1 is closed and channel 2 is normal, channel 1 is normal and channel 2 is closed, and channel 1 and channel 2 are closed at the same time, the main and parallel track relays should remain energized.

[0083] Adjust the signal generator unit to output a frequency-shifted signal within the working value range of the corresponding acquisition position, read the frequency-shifted signal output by the acquisition digital control device, and verify the acquisition value test result.

[0084] In summary, the test system of the digital control device can realize the functional test of the electrical indicators of the digital control device, and the test process is an automated test, which saves time and manpower.

[0085] The test system for digital control equipment provided in the present embodiment includes: a host computer and an auxiliary test unit; the host computer is connected to the digital control equipment through the auxiliary test unit, and the host computer cooperates with the auxiliary test unit to realize functional testing of electrical indicators of the digital control equipment. The functional testing of electrical indicators of the digital control equipment includes: at least one of voltage testing, frequency testing, threshold testing, and response testing. That is, the test system for digital control equipment provided in the present application can realize functional testing of electrical indicators of digital control equipment, thereby ensuring the safety and reliability of the digital track circuit system of the station using the equipment.

[0086] Optionally, based on the test system for the digital control device provided above, another embodiment of the present application further provides a station digital track circuit system, and the digital control device in the station digital track circuit system can be subjected to electrical index function testing by the test system for the digital control device described in any of the above embodiments.

[0087] It should be noted that, for relevant descriptions on the test system of the digital control device, please refer to the above embodiments, which will not be repeated here; for relevant descriptions on the test system of the digital control device, please refer to the prior art, which will not be repeated in this application.

[0088] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, 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 creative work.

[0089] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0090] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0091] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test system for digital control equipment, It is characterized in that include: Host computer and auxiliary test unit; The host computer is connected to the digital control device through the auxiliary test unit. The host computer cooperates with the auxiliary test unit to implement functional testing of the electrical indicators of the digital control device. The functional testing of the electrical indicators of the digital control device includes: at least one of voltage testing, frequency testing, threshold testing, and response testing.

2. The digital control device test system according to claim 1, It is characterized in that Also includes: A power supply unit, wherein the power supply unit is provided with a power supply voltage monitoring meter for supplying power to the auxiliary test unit and / or the host computer.

3. The digital control device test system according to claim 1, It is characterized in that The auxiliary test unit includes: an operation control unit, a DC measurement unit, an AC measurement unit, a communication unit, a signal generator unit, a time measurement unit and a relay array unit; The operation control unit is used to control at least one action of the DC measurement unit, the AC measurement unit, the communication unit, the signal generator unit, the time measurement unit and the relay array unit according to the instructions sent by the host computer, so as to realize the functional test of the electrical indicators of the digital control device and feed back the test results to the host computer.

4. The digital control device test system according to claim 3, It is characterized in that The DC measurement unit includes: a first operational amplifier circuit, a first AD converter, a first voltage reference circuit and a first digital isolator; The input end of the first operational amplifier circuit serves as the input end of the DC measurement unit and is respectively connected to the terminal of the device under test, the track relay and the alarm relay; The output end of the first operational amplifier circuit is connected to the first input end of the first AD converter, the output end of the first voltage reference circuit is connected to the second input end of the first AD converter, the output end of the first AD converter is connected to the input end of the first digital isolator, and the output end of the first digital isolator serves as the output end of the DC measurement unit and is connected to the operation control unit.

5. The test system for a digital control device according to claim 3, It is characterized in that The AC measurement module includes: a second operational amplifier circuit, a second AD converter, a second voltage reference circuit and a second digital isolator; The input end of the second operational amplifier circuit is used as the input end of the AC measurement unit and is connected to the terminal of the device under test; The output end of the second operational amplifier circuit is connected to the first input end of the second AD converter, the output end of the second voltage reference circuit is connected to the second input end of the second AD converter, the output end of the second AD converter is connected to the input end of the second digital isolator, and the output end of the second digital isolator serves as the output end of the AC measurement unit and is connected to the operation control unit.

6. The test system for a digital control device according to claim 3, It is characterized in that The communication unit comprises: a first communication subunit and a second communication subunit; The first communication subunit is connected to the terminals of the device under test and the operation control unit respectively, and the second communication subunit is connected to the relay array unit and the operation control unit respectively.

7. The test system for a digital control device according to claim 3, It is characterized in that The signal generator unit includes: a third digital isolator, a DA converter, a third voltage reference circuit, a third operational amplifier circuit and a low-pass filter unit; The input end of the third digital isolator serves as the input end of the signal generator unit and is connected to the main control operation unit; the output end of the third digital isolator is connected to the first input end of the DA converter, the output end of the third voltage reference circuit is connected to the second input end of the DA converter, the output end of the DA converter is connected to the input end of the low-pass filter unit through the third operational amplifier circuit, and the output end of the low-pass filter unit serves as the output end of the signal generator unit.

8. The test system for a digital control device according to claim 3, It is characterized in that The time measurement unit comprises: a main control operation unit, and the main control operation unit is connected to the track relay and the alarm relay respectively.

9. The test system for a digital control device according to claim 3, It is characterized in that The relay array unit comprises: a relay unit, a fourth digital isolator, a relay driver, a CPU unit and a communication subunit; The input end of the communication subunit is connected to the operation control unit as the input end of the relay array unit; the output end of the relay unit is connected to the terminal of the device under test as the output end of the relay array unit.

10. A digital track circuit system for a station, It is characterized in that The digital control equipment in the station digital track circuit system can be tested for electrical index functions by the testing system for the digital control equipment as described in any one of claims 1 to 9.

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