CN113346964A - Outdoor LEU test system and implementation method - Google Patents
Outdoor LEU test system and implementation method Download PDFInfo
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- CN113346964A CN113346964A CN202110760199.8A CN202110760199A CN113346964A CN 113346964 A CN113346964 A CN 113346964A CN 202110760199 A CN202110760199 A CN 202110760199A CN 113346964 A CN113346964 A CN 113346964A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/59—Responders; Transponders
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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Abstract
The invention discloses an outdoor LEU test system and an implementation method, comprising an industrial control computer, an LEU communication interface unit, a photoelectric conversion module, a responder reading and writing tool, an active responder, a controllable power supply and a switching recovery relay, wherein a data port of the industrial control computer is connected to the photoelectric conversion module through the LEU communication interface unit, and the photoelectric conversion module is connected with an S interface of a tested outdoor LEU; meanwhile, the industrial control computer is connected with a reading and writing tool of the transponder, and the reading and writing tool of the transponder reads the message sent by the active transponder in a wireless mode; the active responder is connected with a C interface of the tested outdoor LEU, and the tested outdoor LEU is connected with a simulation load. The invention simulates the real working state of the outdoor LEU, realizes the test of the function and performance of the outdoor LEU, improves the test efficiency and the measurement accuracy, reduces the labor intensity and ensures the test consistency and accuracy.
Description
Technical Field
The invention relates to a railway signal equipment detection application technology, in particular to an outdoor LEU test system and an implementation method.
Background
An outdoor LEU (line Electronic Unit) is an important component of ground equipment of a transponder transmission system, can periodically receive transmission messages from external equipment (ground train control centers and the like) through a serial communication interface, converts the transmission messages into message information, converts the message information into a C interface signal after circuit signal processing, and sends the C interface signal to transponder equipment, so that the remote transmission problem is solved. After the outdoor LEU is used for a period of time on site, the function test of each module needs to be carried out regularly.
At present, testing of each module in the outdoor LEU is completed manually, efficiency is low, testing errors are large, labor intensity is high, testing range is single, and the mode cannot simultaneously realize function and performance testing of the outdoor LEU in production and research and development processes.
Disclosure of Invention
Aiming at the defects that the testing of each module in the outdoor LEU in the prior art is low in efficiency and large in error, and the function and performance testing of the outdoor LEU in the production and research and development processes cannot be simultaneously realized, the invention aims to solve the technical problem of providing an outdoor LEU testing system and an outdoor LEU testing method, wherein the outdoor LEU testing system and the outdoor LEU testing method can be used for testing the outdoor LEU and also can be used for testing the function and performance of the outdoor LEU in the production and research and development processes.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides an outdoor LEU test system, which comprises an industrial control computer, an LEU communication interface unit, a photoelectric conversion module, a responder reading and writing tool, an active responder, a controllable power supply and a switching recovery relay, wherein a data port of the industrial control computer is connected to the photoelectric conversion module through the LEU communication interface unit, and the photoelectric conversion module is connected with an S interface of an outdoor LEU to be tested; meanwhile, the industrial control computer is connected with a reading and writing tool of the transponder, and the reading and writing tool of the transponder reads the message sent by the active transponder in a wireless mode; the active responder is connected with a C interface of the tested outdoor LEU, and the tested outdoor LEU is connected with an analog load.
The analog load is connected with the C interface of the outdoor LEU to be tested, the analog load is respectively connected with the oscilloscope and the frequency spectrograph, and signals output by the oscilloscope and the frequency spectrograph are respectively connected to the network communication port of the industrial control computer.
The invention also has a switching recovery relay, one group of contacts of the switching recovery relay is connected with the switching state end of the tested outdoor LEU, and the other group of contacts of the switching recovery relay is connected back to the I/O input port of the industrial control computer.
The transponder reading and writing tool comprises a core control module, an energy sending module, a message receiving module and a message demodulating and decoding module, wherein the core control module receives a command sent by an industrial control computer and outputs a control instruction to the energy sending module, the energy sending module sends energy to a transponder, the message receiving module receives a message sent by the transponder and transmits the message to the message demodulating and decoding module, and the message demodulating and decoding module sends the analyzed message back to the industrial control computer through the core control module.
The invention also provides an implementation method of the outdoor LEU test system, which comprises the following steps:
1) the industrial control computer is provided with upper computer software which simulates S interface communication, and the communication information is converted into an S interface communication protocol which accords with the LEU communication and an optical fiber communication physical channel which is suitable for remote transmission through an LEU communication interface unit and a photoelectric conversion module, and the communication interface of an outdoor LEU 11 to be tested outside the room is tested;
2) the industrial control computer controls the reading and writing tool of the transponder to read the message information of the active transponder, and compares the read message data with the sent data, so as to realize the detection of the communication data channel and the physical channel and the detection of the output signal of the tested outdoor LEU.
3) The simulation load is connected with the outdoor LEU to be tested through the C interface, various open-short circuit working states of the outdoor LEU are tested through the simulation load, and meanwhile the performance of the C interface of the LEU equipment is tested through the simulation load in cooperation with the oscilloscope and the frequency spectrometer equipment.
The method also comprises a step 4) of controlling the controllable power supply through the industrial control computer, and switching the final output of the two LEU devices installed inside the outdoor LEU to realize the automatic test of the two LEU devices; and reading the state of the switching recovery relay through an industrial control computer, and carrying out switching supervision on whether switching is carried out.
In step 2), the industrial control computer controls the transponder reading and writing tool to read the message information of the active transponder, which specifically comprises the following steps: the industrial control computer sends a command to a core control module in the reading and writing tool of the responder through a USB interface, the energy sending module sends 27MHz energy to activate the responder, the message receiving module receives a message sent by the responder, the message demodulating and decoding module analyzes the message of the responder, and the core control module sends the analyzed message back to the industrial control computer through the USB interface.
The invention has the following beneficial effects and advantages:
1. compared with the prior art, the invention simulates the real working state of the outdoor LEU, can simultaneously realize the function and performance test of the outdoor LEU in the production and research and development processes, improves the test efficiency and the measurement accuracy, and reduces the labor intensity.
2. The invention uses the test method that the upper computer of the industrial computer reads the instrument and meter for the test of the performance of the C interface, thus ensuring the consistency and accuracy of the test; the controllable power supply is controlled by the upper computer of the industrial computer, so that automatic testing of two LEUs inside the outdoor LEU is automatically switched, and whether switching is realized or not is supervised by reading the state of the switching recovery relay.
3. The invention adopts a self-made transponder reading and writing tool, can realize the control of the message reading and writing tool through the upper computer software of the industrial computer, and the message reading and writing tool can set the frequency and the times of reading the message according to the requirement and can analyze and store the content of the read message.
Drawings
FIG. 1 is a block diagram of an outdoor LEU test system of the present invention;
FIG. 2 is a block diagram of the structure of the reading and writing tool of the responder in the system of the present invention.
Detailed Description
The invention is further elucidated with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an outdoor LEU test system, which includes an industrial control computer 1, an LEU communication interface unit 2, a photoelectric conversion module 3, a transponder reading/writing tool 4, an active transponder 5, a controllable power supply 6, and a switching recovery relay 7, wherein a data port (USB port) of the industrial control computer 1 is connected to the photoelectric conversion module 3 through the LEU communication interface unit 2, and the photoelectric conversion module 3 is connected to an S interface of an outdoor LEU 11 to be tested; meanwhile, the industrial control computer 1 is connected with a reading and writing tool 4 of the transponder, the reading and writing tool 4 of the transponder is in wireless communication connection with the active transponder 5, and the reading and writing tool of the transponder reads the message sent by the active transponder in a wireless mode; the active transponder 5 is connected with a C interface of the tested outdoor LEU 11, and the tested outdoor LEU 11 is connected with an analog load 10.
The analog load 10 is connected with a C interface of the tested outdoor LEU 11, the analog load 10 is respectively connected with the oscilloscope 8 and the spectrometer 9, and signals output by the oscilloscope 8 and the spectrometer 9 are respectively connected to a network communication port of the industrial control computer 1.
The invention also has a switching recovery relay 7, one group of contacts of the switching recovery relay 7 is connected with the switching state end of the tested outdoor LEU 11, and the other group of contacts of the switching recovery relay 7 is connected back to the I/O input port of the industrial control computer.
As shown in fig. 2, the reading and writing tool of the transponder includes a core control module, an energy sending module, a message receiving module and a message demodulating and decoding module, wherein the core control module receives a command sent by the industrial control computer and outputs a control command to the energy sending module, the energy sending module sends energy to the transponder, the message receiving module receives a message sent by the transponder and transmits the message to the message demodulating and decoding module, and the message demodulating and decoding module sends the analyzed message back to the industrial control computer through the core control module.
The industrial control computer 1 is sequentially connected with an LEU communication interface unit 2 and a photoelectric conversion module 3; meanwhile, the industrial control computer 1 is also connected with a transponder reading and writing tool 4 and an active transponder 5. The oscilloscope 8 and the spectrometer 9 are both connected with an analog load 10, and the analog load 10 is connected with an outdoor LEU 11 to be tested. And the switching recovery relay 7 is connected with an outdoor LEU 11 to be tested.
The industrial control computer 1 is provided with upper computer software, and the upper computer software realizes simulation of S interface communication.
The transponder read-write tool in the system is independently developed and suitable for the system, and the core control module, the energy sending module, the message receiving module and the message demodulating and decoding module are all realized by adopting the existing hardware circuit structure. The responder read-write tool is provided with a wired USB port and can be connected with an industrial control computer through the USB port, and the responder read-write tool controls and reads the message information of the active responder according to the control command sent by the industrial control computer and sends the message information to the industrial control computer.
The industrial control computer sends a command to the core control module through the USB interface, the energy sending module sends 27MHz energy to activate the transponder, the message receiving module receives a message sent by the transponder, the message demodulating and decoding module analyzes the transponder message, and the core control module sends the analyzed message back to the industrial control computer through the USB interface.
The invention also provides an implementation method of the outdoor LEU test system, which comprises the following steps:
1) the industrial control computer 1 is provided with upper computer software which simulates S interface communication, and the communication information is converted into an S interface communication protocol which accords with the LEU communication and an optical fiber communication physical channel which is suitable for remote transmission through the LEU communication interface unit 2 and the photoelectric conversion module 3, and a communication interface of an outdoor LEU 11 to be tested outside a test room is tested;
2) the industrial control computer 1 controls the transponder reading and writing tool 4 to read the message information of the active transponder 5, compares the read message data with the sent data, and realizes the detection of a communication data channel and a physical channel and the detection of the output signal of the tested outdoor LEU 11.
3) The simulation load is connected with the outdoor LEU 11 to be tested through the C interface, various open-short circuit working states of the outdoor LEU are tested through the simulation load, and meanwhile the performance of the C interface of the LEU equipment is tested through the simulation load in cooperation with the oscilloscope and the frequency spectrometer equipment.
The invention also comprises a step 4) of controlling the controllable power supply 6 through the industrial control computer 1 to switch the final output of two or more outdoor LEU devices, so as to realize the automatic test of the two or more LEU devices; the state of the switching recovery relay 7 is read by the industrial control computer 1, and whether switching is carried out or not is monitored.
The invention can complete the main control work of the test through an industrial control computer, including the simulation of an outdoor LEU communication S interface, the reading analysis and the message comparison of the active responder message; the oscilloscope and the frequency spectrograph measure various performance indexes of the C interface of the outdoor LEU; and driving auxiliary peripherals such as a mining relay and a module load to complete other functional tests of the outdoor LEU.
The transponder reading and writing tool in the method is independently developed and suitable for the system, and the equipment comprises a core control module, an energy sending module, a message receiving module and a message demodulating and decoding module. The industrial control computer sends a command to the core control module through the USB interface, the energy sending module sends 27MHz energy to activate the transponder, the message receiving module receives a message sent by the transponder, the message demodulating and decoding module analyzes the transponder message, and the core control module sends the analyzed message back to the industrial control computer through the USB interface.
In the method, the upper computer software of the industrial computer is independently developed and is suitable for the system, and the core control is realized through the software.
In this embodiment, the controllable power supply is controlled to realize alternate testing of two indoor LEUs inside the outdoor LEU, and the state of the switching recovery relay is read by the industrial control computer to detect whether the LEU under the expected control is working. When the identified control is LEU equipment expected to need testing, S interface communication is simulated through upper computer software, signals are sent to an LEU communication interface unit and a photoelectric conversion module, communication information is converted into an S interface communication protocol conforming to LEU communication and an optical fiber communication physical channel adapting to remote transmission, the communication interface of an outdoor LEU to be tested outside a room is tested, at the moment, the upper computer software of the industrial control computer controls a transponder reading and writing tool to read message information of an active transponder and compares the read message data with the sent data, detection of a communication data channel and the physical channel is achieved, and detection of output signals of the outdoor LEU to be tested is achieved.
The C interface of the outdoor LEU is connected with different analog loads to test various open-short circuit working states of the outdoor LEU. And simultaneously, the performance of the C interface of the LEU equipment is tested by using the analog load in cooperation with an oscilloscope and a spectrometer. And reading data information of the oscilloscope and the spectrometer equipment by the upper computer software of the industrial control computer, and analyzing test data so as to obtain the performance index of the C interface and display the performance index.
After the test is finished, the other LEU of the two LEUs inside the outdoor LEU is tested by controlling the controllable power supply, and the state of the switching recovery relay is read by the industrial control computer to detect whether the LEU is under the expected control. The test work was performed as above.
The system and the method simulate the real working state of the outdoor LEU and realize the test of the function and the performance of the outdoor LEU.
Claims (7)
1. An outdoor LEU test system which characterized in that: the system comprises an industrial control computer, an LEU communication interface unit, a photoelectric conversion module, a responder reading and writing tool, an active responder, a controllable power supply and a switching recovery relay, wherein a data port of the industrial control computer is connected to the photoelectric conversion module through the LEU communication interface unit, and the photoelectric conversion module is connected with an S interface of a tested outdoor LEU; meanwhile, the industrial control computer is connected with a reading and writing tool of the transponder, and the reading and writing tool of the transponder reads the message sent by the active transponder in a wireless mode; the active responder is connected with a C interface of the tested outdoor LEU, and the tested outdoor LEU is connected with an analog load.
2. The outdoor LEU testing system of claim 1, wherein: the analog load is connected with the C interface of the outdoor LEU to be tested, the analog load is respectively connected with the oscilloscope and the frequency spectrograph, and signals output by the oscilloscope and the frequency spectrograph are respectively connected to the network communication port of the industrial control computer.
3. The outdoor LEU testing system of claim 1, wherein: and the switching recovery relay is also arranged, one group of contact points of the switching recovery relay is connected with the switching state end of the tested outdoor LEU, and the other group of contact points of the switching recovery relay is connected back to the I/O input port of the industrial control computer.
4. The outdoor LEU testing system of claim 1, wherein: the transponder reading and writing tool comprises a core control module, an energy sending module, a message receiving module and a message demodulating and decoding module, wherein the core control module receives a command sent by an industrial control computer and outputs a control instruction to the energy sending module, the energy sending module sends energy to a transponder, the message receiving module receives a message sent by the transponder and transmits the message to the message demodulating and decoding module, and the message demodulating and decoding module sends the analyzed message back to the industrial control computer through the core control module.
5. An implementation method of an outdoor LEU test system is characterized by comprising the following steps:
1) the industrial control computer is provided with upper computer software which simulates S interface communication, and the communication information is converted into an S interface communication protocol which accords with the LEU communication and an optical fiber communication physical channel which is suitable for remote transmission through an LEU communication interface unit and a photoelectric conversion module, and the communication interface of an outdoor LEU 11 to be tested outside the room is tested;
2) the industrial control computer controls the reading and writing tool of the transponder to read the message information of the active transponder, and compares the read message data with the sent data, so as to realize the detection of a communication data channel and a physical channel and simultaneously realize the detection of the output signal of the tested outdoor LEU;
3) the simulation load is connected with the outdoor LEU to be tested through the C interface, various open-short circuit working states of the outdoor LEU are tested through the simulation load, and meanwhile the performance of the C interface of the LEU equipment is tested through the simulation load in cooperation with the oscilloscope and the frequency spectrometer equipment.
6. The method of claim 5, wherein: step 4), controlling a controllable power supply through an industrial control computer, and switching the final output of two LEU devices installed inside the outdoor LEU to realize automatic testing of the two LEU devices; and reading the state of the switching recovery relay through an industrial control computer, and carrying out switching supervision on whether switching is carried out.
7. The method of claim 5, wherein: in step 2), the industrial control computer controls the transponder reading and writing tool to read the message information of the active transponder, which specifically comprises the following steps: the industrial control computer sends a command to a core control module in the reading and writing tool of the responder through a USB interface, the energy sending module sends 27MHz energy to activate the responder, the message receiving module receives a message sent by the responder, the message demodulating and decoding module analyzes the message of the responder, and the core control module sends the analyzed message back to the industrial control computer through the USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110760199.8A CN113346964A (en) | 2021-07-06 | 2021-07-06 | Outdoor LEU test system and implementation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110760199.8A CN113346964A (en) | 2021-07-06 | 2021-07-06 | Outdoor LEU test system and implementation method |
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| CN113346964A true CN113346964A (en) | 2021-09-03 |
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| CN202110760199.8A Pending CN113346964A (en) | 2021-07-06 | 2021-07-06 | Outdoor LEU test system and implementation method |
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2021
- 2021-07-06 CN CN202110760199.8A patent/CN113346964A/en active Pending
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