An automatic detection platform for input / output boards of computer interlocking systems

Abstract

The present invention relates to an automatic detection platform for input / output boards of a computer interlocking system, comprising an upper computer and a lower system connected to each other, wherein the lower system comprises a switching unit, a protocol conversion unit and a signal conversion unit respectively connected to a controller, wherein the controller is connected to the upper computer via the protocol conversion unit, wherein the controller is respectively connected to an input / output interface via the switching unit and the signal conversion unit, wherein the input / output interface is connected to an input board to be tested or an output board to be tested, wherein the input board to be tested or the output board to be tested is connected to the upper computer via the protocol conversion unit, wherein the switching unit identifies the type of the board to be tested and selects the test contents of different types of boards. Compared with the prior art, the automatic test of the input board to be tested or the output board to be tested can be realized, thereby improving the efficiency and accuracy of the test, and at the same time, a large number of connections are simplified, making the detection platform more reliable and easy to maintain.

Description

Technical Field

[0001] The invention relates to the field of station interlocking, and in particular to an automatic detection platform for input / output boards of a computer interlocking system. Background Art

[0002] Railway stations basically control the operation of trains and trains by establishing routes. The route is composed of relevant turnouts and track sections, and is a specific route indicated and protected by signals. The establishment of the route must check the relationship between signals, turnouts and track sections, and meet the corresponding conditions. Once established, it must be "locked" to avoid damaging the route due to misoperation or other factors and endangering driving safety. Interlocking is to ensure the correct relationship between signals, turnouts and routes through technical methods. Interlocking equipment is an essential core basic equipment for railway stations to ensure the normal and safe operation of trains and trains.

[0003] The computer interlocking system realizes interlocking by controlling relays. The structure of a typical computer interlocking system includes human-computer interaction layer, main control layer, execution layer, interface layer and field equipment layer. The main control layer includes the main logic unit, and the execution layer includes the input board and output board. The input board and output board are components used by the computer interlocking system to drive and collect relay contact information. The input board is represented by FIMI and the output board is represented by FIMO. The input board includes 32 independent input channels for collecting the status of station signals, switches and approaches; the output board includes 16 independent output channels for driving the relay coil to operate the signal machine and switch to ensure driving safety. The detection platform is an important tool for testing whether the various functions of the input board and the output board meet the operation requirements and ensure normal operation during their life cycle.

[0004] The existing product testing platform uses a test cage and an independent condition box plus a large number of wires to make a test cable for connection. There are the following problems: 1. The condition box requires manual operation to adjust and measure the voltage, which has low timeliness and insufficient accuracy. 2. The upper computer based on the DOS system cannot realize automated testing. 3. The measurement results and test reports need to be filled in manually, which cannot meet the requirements of automated recording and storage, and is not convenient for later traceability and management.

[0005] The Chinese invention patent CN103885439B specification discloses an automated test platform for FIMI and FIMO single disks, which is connected to the board under test, and the board under test includes a FIMI single disk and a FIMO single disk. The automated test platform includes a test fixture, a power supply module, a host computer module, and an interface module. The test fixture is connected to the board under test, the power supply module, and the interface module, respectively, and the power supply module and the host computer module are both connected to the interface module. This invention cannot identify the type of board under test and automatically switch to the corresponding mode. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide an automatic detection platform for the input / output board of a computer interlocking system.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] An automatic detection platform for input / output boards of a computer interlocking system comprises a host computer and a lower system connected to each other, wherein the lower system comprises a switching unit, a protocol conversion unit and a signal conversion unit respectively connected to a controller, the controller is connected to the host computer via the protocol conversion unit, the controller is respectively connected to an input / output interface via the switching unit and the signal conversion unit, the input / output interface is connected to an input board to be tested or an output board to be tested, and the output board to be tested or the input board to be tested is connected to the host computer via the protocol conversion unit.

[0009] The lower system further comprises a power supply unit, which is respectively connected to the controller, the signal conversion unit, the protocol conversion unit and the switching unit.

[0010] The signal conversion unit includes an AD conversion subunit and a DA conversion subunit. The AD conversion subunit converts the analog signal output by the output board to be tested into a digital signal and transmits it to the controller. The DA conversion subunit converts the analog signal output by the controller into a digital signal and transmits it to the input board to be tested.

[0011] The AD conversion subunit includes a voltage stabilizer, an operational amplifier and an AD chip connected in sequence, the DA conversion subunit includes an operational amplifier and a DA chip connected to each other, the AD chip is connected to the input board to be tested, and the DA chip is connected to the output board to be tested.

[0012] The protocol conversion unit comprises a CAN interface circuit and a 5650 protocol conversion circuit. The controller is connected to the host computer via the CAN interface circuit, and the input board to be tested or the output board to be tested is connected to the host computer via the 5650 protocol conversion circuit.

[0013] The switching unit comprises an identification circuit and a chip selection relay array circuit which are connected to each other. The identification circuit identifies the type of the board to be tested, and the chip selection relay array circuit realizes the selection of the test channel.

[0014] The host computer is equipped with Windows operating system.

[0015] The platform also includes a database server, which is connected to the host computer.

[0016] The controller, the switching unit, the protocol conversion unit and the signal conversion unit are integrated inside the cage, and the input / output interface is located on the cage.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The lower system is controlled by the upper computer and includes a switching unit controlled by the upper computer. It can identify the type of board to be tested and complete the automated testing of the input board to be tested or the output board to be tested, thereby improving the efficiency and accuracy of the test. At the same time, it simplifies a large number of connections, making the detection platform more reliable and easy to maintain.

[0019] (2) The Windows-based host computer can automatically obtain the measurement results and generate a test report.

[0020] (3) The database server is connected to the host computer and can automatically store the test results, which is convenient for future traceability and prepares for future digital informationization.

[0021] (4) Highly integrated: All tests on two single disks can be completed through one input / output interface, without the need to make corresponding matching modules separately.

[0022] (5) Reliability and easy maintenance: The detection platform adopts a standard integrated cage design, avoiding the use of a large number of wires and test modules, making the system more reliable and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 is a circuit diagram of a switching unit of the present invention;

[0025] Figure 3 This is a circuit diagram of the protocol conversion unit of the present invention. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Example

[0028] like Figure 1As shown, this embodiment provides an input / output board automatic detection platform for a computer interlocking system, the platform includes: a host computer and a database server connected to the host computer, the host computer is connected to a lower system, the lower system includes a controller, a switching unit, a signal conversion unit, an input / output interface, a power supply unit and a protocol conversion unit, the signal conversion unit includes an AD conversion subunit and a DA conversion subunit, and the controller is an MCU controller; as shown Figure 3 As shown, the protocol conversion unit includes a CAN interface circuit and a 5650 protocol conversion circuit, and the input / output interface includes a set of test slots of 64-core test terminals and 32-core communication terminals, which serve as an interface between the input board to be tested or the output board to be tested and the detection platform. The host computer is connected to the controller through the protocol conversion unit, and the controller is connected to the input / output interface through the switching unit, the AD conversion subunit, and the DA conversion subunit. The input / output interface is connected to the input board to be tested or the output board to be tested, and the power supply unit provides power to each unit inside the platform.

[0029] The host computer is based on the Windows operating system and provides a graphical human-computer interaction interface to intuitively present and control the entire test process and results, and can automatically generate a test report. The controller includes an embedded ARM control chip and supporting circuits. The ARM chip reads the host computer instructions through the CAN interface circuit, controls the test content and test process of the lower system, obtains test data and the state information of the object under test, and transmits them to the host computer. Figure 2As shown, the switching unit is composed of an identification circuit and a chip selection relay array circuit. When the input board to be tested or the output board to be tested is inserted into the test slot and powered on, the identification circuit determines the type of the board to be tested by whether a -24VDC is collected and fed back to the MCU. If -24VDC is collected, it is an output board (FIMO), otherwise it is an input board (FIMI). At the same time, the MCU controls the chip selection chip to drive the relay to switch to the test environment that matches the board to be tested, so as to realize the selection of various channels of the input board to be tested or the output board to be tested and different types of test contents. The AD conversion subunit includes a voltage regulator, an operational amplifier and an AD chip. The AD chip is connected to the output board to be tested, and converts the analog voltage value of the output board to be tested into a digital signal and returns it to the MCU. The DA conversion subunit includes an operational amplifier and a DA chip. The DA chip is connected to the input board to be tested, and is controlled by the MCU to convert 24VDC into a continuously adjustable voltage of 0-12VDC, which is used to provide the collection bit voltage to the input board to be tested. The power supply unit converts 220V AC voltage into 5V and 24V DC voltage for use by the platform's internal MCU, AD conversion subunit, DA conversion subunit, etc. and the board to be tested. The CAN interface circuit of the protocol conversion unit serves as a channel for the host computer and the MCU controller to transmit instructions and data. The 5650 protocol conversion circuit is used to convert the encrypted instructions inside the board to be tested so that it can communicate with the host computer through the CAN communication protocol. The database server is set up in the enterprise intranet and provides access through Ethernet for test data storage, test record retrieval, etc.

[0030] Working principle: The tester installs the board to be tested into the test slot of the 64-core test terminal of the input / output board automatic detection platform. After the system is powered on, the host computer test program runs. The tester can calibrate the voltage of the AD conversion subunit and the DA conversion subunit on the login interface, and then choose to enter the input board or output board test page. The platform can automatically identify the type of board to be tested through the identification circuit to prevent misdetection.

[0031] Input board test: The host computer sends a collection call instruction to the 5650 protocol conversion circuit through the CAN interface circuit, and the 5650 protocol conversion circuit sends the converted instruction to the input board to be tested through the test slot of the 32-core communication terminal. The input board to be tested collects the acquisition status of each channel and the alarm information and sends it back to the host computer. At the same time, the host computer sends a voltage adjustment instruction (including continuous voltage adjustment, fixed voltage or custom) to the MCU controller through the CAN interface circuit. The MCU controls the DA conversion subunit to achieve voltage adjustment and returns the current voltage adjustment value to the host computer via the CAN interface circuit. In addition, the MCU controls the switching unit to select the test channel to form a specific input condition (single acquisition, full acquisition or custom). For the logic 0 test, the DA conversion subunit is automatically adjusted from -5V to 0V, and the host computer takes the feedback of the input board to be tested, which is 0 for the last time and there is no "error acquisition abnormal" alarm, and takes this as the boundary 0 voltage; for the logic 1 test, the DA conversion subunit is automatically adjusted from 0V to -10V, and the host computer takes the feedback of the input board to be tested, which is 1 for the last time and there is no "error acquisition abnormal" alarm, and takes this as the boundary 1 voltage. Finally, the host computer determines whether the test results of each channel meet the requirements according to the preset range.

[0032] Output board test: The host computer sends a drive test instruction to the 5650 protocol conversion circuit through the CAN interface circuit. The 5650 protocol conversion circuit is responsible for converting the test instruction and sending it to the output board to be tested through the test slot of the 32-core communication terminal (including single drive, full drive, cycle or custom). The output board to be tested collects the drive status of each channel and the alarm information and sends it back to the host computer. At the same time, the host computer sends a voltage acquisition instruction to the MCU controller through the CAN interface circuit. The MCU controls the AD conversion subunit to complete the acquisition of the voltage of each channel of the output board to be tested, and realizes the switching of the output board no-load and load tests by controlling the switching unit. The host computer records the no-load and load voltages of each channel. If the voltage value of a channel is less than 20V or its no-load voltage is less than the load voltage, the output of the channel is judged to be faulty. In addition, the mixed power test of the output board to be tested is implemented under the single drive instruction. The MCU controls the switching unit to insert a 10V DC into the channel to be tested. If the output board to be tested returns an error message, the mixed power test passes.

[0033] Testers can choose custom test or automatic test. If automatic test is selected, the host computer will send the compiled test command package, and the MCU will receive the command and control the platform to perform alignment test on each channel of the object under test. After the test is completed, the test report will be automatically generated and the data will be saved to the local and server databases at the same time. The required test records can be found by logging into the database server.

[0034] Improvements of this embodiment:

[0035] 1. By adopting an automated control process, the efficiency and accuracy of the test are improved, and a large number of connections are simplified, making the detection platform more reliable and easy to maintain.

[0036] 2. The host computer is based on the Windows operating system, which makes its operability and the control and management of the test process more convenient and meets the needs of automated production.

[0037] 3. A dedicated server is set up to store the test results, which is convenient for future traceability and preparation for future digitalization and informatization.

Claims

1. An automatic detection platform for input / output boards of a computer interlocking system, comprising an interconnected upper computer and a lower system, characterized in that: The lower system includes a switching unit, a protocol conversion unit and a signal conversion unit respectively connected to the controller, the controller is connected to the host computer through the protocol conversion unit, the controller is connected to the input / output interface through the switching unit and the signal conversion unit respectively, the input / output interface is connected to the input board to be tested or the output board to be tested, the input board to be tested or the output board to be tested is connected to the host computer through the protocol conversion unit, and the switching unit identifies the type of the board to be tested and selects the test content of different types of boards; The lower system further includes a power supply unit, which is respectively connected to the controller, the signal conversion unit, the protocol conversion unit and the switching unit; The signal conversion unit includes an AD conversion subunit and a DA conversion subunit. The AD conversion subunit converts the analog signal output by the output board to be tested into a digital signal and transmits it to the controller. The DA conversion subunit converts the analog signal output by the controller into a digital signal and transmits it to the input board to be tested. The AD conversion subunit includes a voltage stabilizer, an operational amplifier and an AD chip connected in sequence, the DA conversion subunit includes an operational amplifier and a DA chip connected to each other, the AD chip is connected to the input board to be tested, and the DA chip is connected to the output board to be tested; The protocol conversion unit includes a CAN interface circuit and a 5650 protocol conversion circuit, the controller is connected to the host computer via the CAN interface circuit, and the input board to be tested or the output board to be tested is connected to the host computer via the 5650 protocol conversion circuit; The switching unit comprises an identification circuit and a chip selection relay array circuit which are connected to each other. The identification circuit identifies the type of the board to be tested, and the chip selection relay array circuit realizes the selection of the test channel.

2. The automatic detection platform for input / output boards of a computer interlocking system according to claim 1, characterized in that: The host computer is equipped with Windows operating system.

3. The automatic detection platform for input / output boards of a computer interlocking system according to claim 1, characterized in that: It also includes a database server, which is connected to the host computer.

4. The automatic detection platform for input / output boards of a computer interlocking system according to claim 1, characterized in that: The controller, the switching unit, the protocol conversion unit and the signal conversion unit are integrated inside the cage, and the input / output interface is located on the cage.

Images