A test method for rail transit on-board signal equipment

Abstract

The application provides a kind of test method of rail transit vehicle-mounted signal equipment, the test method specifically is: judging operation content based on simulation test operation;Matching operation content with test item, determine the current test interface according to the test item matched and operation content;According to the physical limit condition of equipment, the simulation test operation is converted into the transmission data type corresponding to the current test interface, and the test instruction is obtained;According to the test instruction, the rail transit vehicle-mounted signal equipment is tested.The application can determine the specific test interface by judging the operation content of simulation test operation, and then convert the simulation test operation into the test instruction associated with the real equipment based on the test interface under the physical limit condition of equipment, to test the rail transit vehicle-mounted signal equipment, which can better fit the real interface on site, strengthen the relevance between test instruction and real equipment, and improve the accuracy and reliability of test.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a testing method for rail transit vehicle-mounted signaling equipment. Background Technology

[0002] Vehicle-on-board (VOBC) signaling equipment, a crucial component of the CBTC system, is responsible for receiving and processing instructions from base stations and controlling vehicle operation. It plays a vital role in ensuring safe train operation. Therefore, it is essential to test VOBC equipment to guarantee the safe and stable operation of urban rail transit. Currently, there are two main testing methods for VOBC equipment. One method involves directly using real equipment, connecting actual speedometers and other VOBC interface devices, and creating corresponding input interfaces through the movement of actual vehicles or simulated trains. The second method uses pure software to simulate the relevant interfaces, with software attaching the corresponding input and output channels. However, if a purely software-based approach is used, the input test signals of the VOBC equipment are entirely computer-simulated, resulting in low correlation with the actual equipment, low fidelity of the output test signals, and unreliable test results. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies where testing of rail transit vehicle-mounted signaling equipment using purely software-simulated interfaces results in computer-simulated test signals with low correlation to the real equipment, low fidelity, and unreliable test results. This invention provides a testing method for rail transit vehicle-mounted signaling equipment. By judging the operation content of the simulated test, the specific test interface is determined. Then, under the physical constraints of the equipment, the simulated test operation is converted into test instructions associated with the real equipment based on the test interface to test the rail transit vehicle-mounted signaling equipment. This solves the problem that existing software-based testing of rail transit vehicle-mounted signaling equipment results in test signals that are entirely computer-simulated and have low correlation with the real equipment. It better fits the real interface in the field, strengthens the correlation between test instructions and the real equipment, and improves the accuracy and reliability of the test.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A testing method for onboard signaling equipment in rail transit vehicles, comprising,

[0006] On the host computer testing device, simulated test operations are performed on the simulated vehicle, and the simulated test operations are sent to the lower computer testing device.

[0007] The lower-level testing device converts the simulated test operations into corresponding test commands and forwards the test commands to the rail transit vehicle-mounted signaling equipment;

[0008] The onboard signaling equipment of the rail transit vehicle outputs equipment control information according to the received test command, and feeds back the equipment control information to the lower-level test device;

[0009] The lower-level testing device forwards the equipment control information to the upper-level testing device, which verifies the equipment control information and obtains the test results of the rail transit vehicle-mounted signaling equipment based on the verification results.

[0010] Furthermore, the test items include vehicle traction control testing, speed testing, transponder testing, and vehicle interface testing.

[0011] Furthermore, the step of determining the current test interface based on the matched test items and operation content, converting the simulated test operation into the transmission data type corresponding to the current test interface, and obtaining test instructions includes,

[0012] The matched test item is vehicle traction control test. The operation is Cc key insertion operation. It is determined that the current test interface is a relay interface. The received Cc key code is converted into the corresponding relay output value. The converted relay output value is used as the test command.

[0013] Furthermore, the step of determining the current test interface based on the matched test items and operation content, converting the simulated test operation into the transmission data type corresponding to the current test interface, and obtaining test instructions also includes,

[0014] When the matched test item is speed test, the operation is to determine whether the current test interface is the speedometer interface or the radar interface when the train speed is sent, and to perform frequency conversion based on the received train speed. The converted frequency and preset pulse output are then used as test commands.

[0015] Furthermore, the step of determining the current test interface based on the matched test items and operation content, converting the simulated test operation into the transmission data type corresponding to the current test interface, and obtaining test instructions also includes,

[0016] When the matched test item is a transponder test, and the operation involves transmitting transponder data, the current test interface is determined to be the transponder receiving interface. Based on the transmitted transponder data, the corresponding beacon data of the transponder is determined, and the transponder's beacon data is used as the test command.

[0017] Furthermore, the step of determining the beacon data corresponding to the transponder based on the transmitted transponder data and using the transponder's beacon data as a test command also includes determining whether the transponder corresponding to the transmitted transponder data is detected in the current cycle based on the position of the transponder on the current simulated vehicle's corresponding station map. If the corresponding transponder is detected in the current cycle, the beacon data corresponding to the transponder is used as a test command.

[0018] Furthermore, the step of determining the current test interface based on the matched test items and operation content, converting the simulated test operation into the transmission data type corresponding to the current test interface, and obtaining test instructions also includes:

[0019] When the test item is matched to vehicle interface test and the operation content is vehicle protocol message transmission, the current test interface is determined to be a vehicle interface. Based on the period number and CRC calculation, the received vehicle protocol message is modified and the modified vehicle protocol message is used as the test command.

[0020] Furthermore, before performing the operation content judgment based on the simulation test operation, the process also includes selecting a test item and obtaining the operation content of the test item, performing keyword recognition on the operation content of the test item, matching test tags according to the keyword recognition results, selecting the corresponding interface according to the test tags, establishing a connection with the rail transit vehicle signal equipment through the selected corresponding interface, and setting the simulation test operation according to the selected test item.

[0021] The beneficial effects of this invention are:

[0022] By judging the operation content of the simulated test, the specific test interface is determined. Then, under the physical constraints of the equipment, the simulated test operation is converted into test instructions associated with the real equipment based on the test interface to test the on-board signaling equipment of rail transit. This can better fit the real interface on site, strengthen the correlation between test instructions and real equipment, and improve the accuracy and reliability of the test. Attached Figure Description

[0023] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example:

[0026] A test method for onboard signaling equipment in rail transit, such as Figure 1 As shown, including,

[0027] The operation content is determined based on simulated test operations;

[0028] Match the operation content with the test project, and determine the current test interface based on the matched test project and operation content;

[0029] Based on the physical limitations of the equipment, the simulated test operation is converted into the data type corresponding to the current test interface, and the test instructions are obtained.

[0030] Test the onboard signaling equipment of the rail transit vehicle according to the test instructions.

[0031] The on-board signaling equipment for rail transit in this embodiment is a VOBC cabinet.

[0032] This embodiment specifically constructs a complete testing environment for rail transit vehicle-mounted signaling equipment through a testing method involving a host computer testing device, a slave computer testing device, and the rail transit vehicle-mounted signaling equipment. The closed-loop testing process formed by the host computer testing device, the slave computer testing device, and the rail transit vehicle-mounted signaling equipment includes:

[0033] On the host computer testing device, simulated test operations are performed on the simulated vehicle, and the simulated test operations are sent to the lower computer testing device.

[0034] The lower-level testing device converts the simulated test operations into corresponding test commands and forwards the test commands to the rail transit vehicle-mounted signaling equipment;

[0035] The onboard signaling equipment of the rail transit vehicle outputs equipment control information according to the received test command, and feeds back the equipment control information to the lower-level test device;

[0036] The lower-level testing device forwards the equipment control information to the upper-level testing device, which verifies the equipment control information and obtains the test results of the rail transit vehicle-mounted signaling equipment based on the verification results.

[0037] The host computer testing device is equipped with stream control software that can interact with the user and has a graphical interface. It can generate corresponding simulated test operations according to the user's needs and send them to the slave computer testing device. It can also receive status values ​​from the slave computer testing device and display them on the interface.

[0038] The lower-level testing device is equipped with real equipment interfaces, including relays, speedometers, radars, vehicle protocols, and transponders. After converting simulated test operations into corresponding test commands, it can control the real equipment interfaces such as relays to output corresponding data to the rail transit vehicle signal equipment according to the test commands, thereby better matching the real interfaces on site and improving the accuracy and reliability of the test.

[0039] As a core component of the current testing environment for onboard signaling equipment in rail transit, the lower-level test device has two main functions. First, it connects to the upper-level test device, receiving control commands and feeding back its own status to the software on the upper-level test device for display. Second, it connects to the VOBC cabinet of the actual equipment, generating relay and bus-type outputs. These bus-type outputs include data from interfaces such as speedometers, vehicle protocols, and transponders. The lower-level test device sends these relay and bus-type outputs to the VOBC cabinet and can also receive relay inputs from the VOBC cabinet.

[0040] The host computer testing device can perform two functions. The first is to display the station map and vehicle position. The host computer testing device can display the current position of the simulated train based on the station map data and the current position of the simulated train, so that the testers can know the current location of the simulated train. The simulated train on the station map will also move according to the current speed.

[0041] The second part is the user interface, which simulates the driver's cab design. Based on the VOBC relay interface, the user interface defines many buttons and checkboxes, such as the Cc key, confirmation button, steering controller, and door modes. Specific simulated test operations can be determined based on these buttons and checkboxes. Additionally, a driver control gear is provided, allowing test personnel to control the train's traction and braking in relevant modes to perform corresponding tests.

[0042] Furthermore, all the above-mentioned simulation test operations involving relay code positions, such as controller operations and speed values, will be transmitted to the lower-level testing device as part of the code stream control. The lower-level testing device will return the corresponding current value, displacement, and other input relay code position information, and the upper-level testing device will display the received information on the interface.

[0043] Before performing the simulation test operation to determine the operation content, the process also includes selecting a test item through the host computer test device and obtaining the operation content of the test item, performing keyword recognition on the operation content of the test item, matching test tags according to the keyword recognition results, and sending the test tags to the slave computer test device. The slave computer test device can select the corresponding interface according to the test tag, thereby establishing a connection with the rail transit vehicle-mounted signal equipment through the selected corresponding interface. After the connection is established, the host computer test device sets up the simulation test operation according to the selected test item.

[0044] Because different items in VOBC testing, and due to different vehicle manufacturers, may have different formats and forms of interfaces such as relays and speedometers, the appropriate test interface can be determined based on the operation content of the test item. This allows for the selection of corresponding tags for different items, thereby automatically combining and matching relevant interfaces, ensuring the universality of the test. For newly emerging vehicle interfaces, expansion can be carried out relatively easily, and subsequent combinations can be made freely based on tags, improving the flexibility and usability of the test.

[0045] The lower-level testing device converts simulated test operations into corresponding test instructions. This includes the upper-level testing device determining the operation content based on the simulated test operation, matching the operation content with the test items, determining the current test interface based on the matched test items and operation content, converting the simulated test operation into the transmission data type corresponding to the current test interface, and obtaining the test instructions.

[0046] The test items include vehicle traction control testing, speed testing, transponder testing, and vehicle interface testing.

[0047] Because different test items correspond to different equipment interfaces, the data types they output are also different. For example, when the operation content is the insertion of a Cc key, the host computer will light up the Cc key code point through the PCI slot and corresponding output board on the industrial control computer, thereby transmitting the Cc key code point to the lower-level test device. After receiving the Cc key code point, the lower-level test device can determine, based on its data type and operation content, that it needs to transmit the information to the rail transit vehicle signal equipment through the relay interface.

[0048] The process includes determining the current test interface based on the matched test items and operation content, converting the simulated test operation into the transmission data type corresponding to the current test interface, and obtaining test instructions, including...

[0049] The matched test item is vehicle traction control test. The operation is Cc key insertion operation. When it is determined that the current test interface is a relay interface, the lower computer converts the received Cc key code into the corresponding relay output value and uses the converted relay output value as the test command.

[0050] When the matched test item is speed testing, the operation involves determining whether the current test interface is a speedometer interface or a radar interface when the train speed is received. The lower-level testing device then performs frequency conversion based on the received train speed and outputs the converted frequency and a preset pulse as the test command. The preset pulse output is the pulse output of the lower-level testing device itself.

[0051] The matched test item is a speed test. The operation involves determining whether the current test interface is a speedometer interface or a radar interface when the train speed is issued. It also includes the lower-level test device calculating the cumulative pulse value of the cycle according to its own cycle and periodically feeding back the calculated cumulative pulse value of the cycle to the upper-level test device. The upper-level test device can determine the position and displacement of the simulated train in each cycle based on the difference in the cumulative pulse value of the cycle fed back by the lower-level test device between adjacent cycles.

[0052] When the test item is speed testing, there may be two test contents: speedometer testing and radar testing. Both can be performed simultaneously or separately according to the user's selection. The specific operation content can be determined by the buttons and checkboxes on the graphical interface, and a corresponding operation content identifier is sent when the train speed is issued, so that the lower-level testing device can distinguish between them.

[0053] When the speed test is performed, the driver's controller gear of the simulated vehicle needs to be set first. The driver's controller gear is -10 to 10, corresponding to forces from -100% to +100%. Taking gear 5 as an example, the traction force should be 50% of the maximum traction force. The host computer test device will then check the internal train's logic state. When both EB and FSB are false and traction is enabled, the traction force is used, and acceleration is calculated using a = f / m. Here, f also includes considerations of gradient force and friction. The gradient force is calculated directly based on the gradient, and the formula for friction is:

[0054] f=1.66+0.0075*v+0.000155*v*v,

[0055] Here, v represents speed in km / h. The host computer test device obtains the train speed of the simulated vehicle at this time through acceleration calculation and sends the train speed down to the slave computer test device.

[0056] If a speedometer test is deemed necessary, the lower-level testing device, upon receiving the train speed, converts the speed into a frequency using data such as the wheel diameter of the simulated vehicle stored within it. The formula for calculating the frequency corresponding to the speedometer test is: f = speed * number of teeth / (π * wheel diameter). The frequency and the lower-level testing device's own pulse output are then transmitted to the rail transit vehicle's onboard signaling equipment via the speedometer interface.

[0057] If radar testing is deemed necessary, the train speed must be converted into radar counts and frequencies, and this frequency must be transmitted to the rail transit vehicle's onboard signaling equipment via the radar interface. The radar technology uses the cumulative train displacement divided by 100. The formula for calculating the corresponding radar test frequency is: f = train speed * 3.6 * 69.444 / 1000.

[0058] When the test item is matched as a transponder test and the operation content is to transmit transponder data, the current test interface is determined to be the transponder receiving interface. The lower-level test device determines the beacon data corresponding to the transponder based on the transmitted transponder data and uses the transponder's beacon data as the test command.

[0059] The lower-level testing device determines the beacon data corresponding to the transponder based on the transmitted transponder data, and uses the transponder's beacon data as a test command. It also includes determining the detection status of the transponder corresponding to the transmitted transponder data in the current cycle based on the position of the transponder on the current simulated vehicle's corresponding station map. When the corresponding transponder is detected in the current cycle, the beacon data corresponding to the transponder is used as a test command.

[0060] When the test item is matched to vehicle interface test and the operation content is vehicle protocol message transmission, the current test interface is determined to be a vehicle interface. The lower-level test device modifies the received vehicle protocol message according to the period number and CRC calculation, and uses the modified vehicle protocol message as the test command.

[0061] The purpose of all the above lower-level testing devices in converting test commands is to simulate the feedback signals from the actual vehicle interface to the onboard signaling equipment of rail transit vehicles.

[0062] The host computer testing device verifies the equipment control information and obtains the test results of the rail transit vehicle-mounted signaling equipment based on the verification results. This includes the verification results showing that the rail transit vehicle-mounted signaling equipment has passed the test. The host computer testing device adjusts the simulated vehicle operating state according to the equipment control information and sets the parameters of the simulated test operation according to the adjusted simulated vehicle operating state when conducting the next test item.

[0063] Taking vehicle traction control testing as an example, if the equipment control information of the rail transit vehicle's onboard signaling equipment passes verification, then adjusting the simulated vehicle's operating state according to the equipment control information includes:

[0064] 1. If the received response is an EB mitigation, set the EB status inside the train to false; otherwise, keep the internal EB status true.

[0065] 2. If the received response is an FSB relief, set the FSB status inside the train to false; otherwise, keep the internal EB status true.

[0066] 3. If a traction enable code is received, set the traction-ready status inside the train to true; otherwise, set it to false.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A test method for a rail transit on-board signal device, characterized in that, The method comprises the following steps: determining operation content based on simulation test operation; matching operation content with test items, determining current test interface according to matched test items and operation content; converting simulation test operation into transmission data type corresponding to current test interface according to physical limitation condition of equipment, obtaining test instruction; testing rail transit vehicle-mounted signal equipment according to test instruction; the test items include vehicle traction control test, speed test, transponder test and vehicle interface test; determining current test interface according to matched test items and operation content, converting simulation test operation into transmission data type corresponding to current test interface according to physical limitation condition of equipment, obtaining test instruction, comprising: when matched test item is vehicle traction control test and operation content is Cc key insertion operation, determining current test interface as relay interface, converting received Cc key code bit into corresponding relay output value, taking converted relay output value as test instruction; further comprising: when matched test item is speed test and operation content is train speed issuing, determining current test interface as speedometer interface or radar interface, performing frequency conversion according to received train speed, taking converted frequency and preset pulse output as test instruction; further comprising: when matched test item is transponder test and operation content is transponder data transmission, determining current test interface as transponder receiving interface, determining beacon data corresponding to transponder according to transmitted transponder data, taking beacon data of transponder as test instruction; when matched test item is vehicle interface test and operation content is vehicle protocol message transmission, determining current test interface as vehicle interface, modifying received vehicle protocol message according to cycle number and crc calculation, taking modified vehicle protocol message as test instruction.

2. The test method of a rail transit vehicle-mounted signal device according to claim 1, characterized in that, determining beacon data corresponding to transponder according to transmitted transponder data, taking beacon data of transponder as test instruction, further comprising: determining whether corresponding transponder of transmitted transponder data is detected in current cycle according to position of transponder on station diagram corresponding to current simulation vehicle, taking beacon data corresponding to transponder as test instruction when corresponding transponder is detected in current cycle.

3. The test method of a rail transit vehicle-mounted signal device according to claim 1, characterized in that, before determining operation content based on simulation test operation, further comprising: selecting test item, obtaining operation content of test item, performing keyword recognition on operation content of test item, matching test label according to keyword recognition result, selecting corresponding interface according to test label, establishing connection with rail transit vehicle-mounted signal equipment through selected corresponding interface, setting simulation test operation according to selected test item.

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