CN107796994B - Portable European standard transponder antenna test platform applied to vehicle section site - Google Patents

Abstract

The invention relates to a portable European standard transponder antenna test platform applied to a vehicle section field, which is used for testing multiple performance indexes of a European standard transponder antenna installed and used in the field, and comprises a European standard transponder antenna test control cage, a transponder beacon mobile platform and upper computer application test equipment; the European standard transponder antenna test control cage is connected with a tested antenna, a beacon corresponding to the tested antenna is installed on a transponder beacon moving platform, the transponder beacon moving platform is fixed on a vehicle section steel rail, and the upper computer uses test equipment to carry out data communication with the European standard transponder antenna test control cage. Compared with the prior art, the invention has the advantages of convenient carrying, simple installation, no need of motor cars and the like.

Description

A portable European standard transponder antenna test platform for use in vehicle depots

Technical Field

The invention relates to the field of railway communication signal equipment maintenance, and in particular to a portable European standard transponder antenna test platform used at a vehicle depot site.

Background Art

The European standard transponder antenna is an important part of railway communication signals and an important vehicle-to-ground communication device in the ATP system. As a train-mounted device, the European standard transponder antenna uses wireless electromagnetic induction technology to achieve energy transfer and data communication with ground beacons in a non-contact manner.

The European standard transponder antenna provides radio frequency energy to the ground transponder beacon through the communication A4 interface. The vehicle-mounted transponder antenna activates the ground transponder beacon in a specific area by sending a fixed-frequency power carrier downward. After the ground beacon is activated, the message data stored in the beacon is cyclically sent to the vehicle-mounted transponder antenna in FSK modulation through the A1 interface until the activation energy inside the ground beacon disappears.

The European standard transponder antenna activates the ground transponder beacon in a certain area through energy carrier mode, so the carrier energy it emits needs to meet certain threshold requirements. After the ground transponder beacon is activated, it will cyclically send fixed message information to the vehicle-mounted European standard transponder antenna. The vehicle-mounted European standard transponder antenna needs to successfully receive the beacon message and upload it to the vehicle-mounted signal system for processing. At the same time, when passing the beacon, the European standard transponder antenna should be able to safely and accurately generate the beacon center point positioning signal and send it to the vehicle-mounted system.

In order to test and verify the above performance parameters, the present invention proposes an implementation scheme for a European standard transponder antenna test platform that can be used on-site in a vehicle depot. Relying on the design requirements of the transponder antenna and the requirements for on-site testing and maintenance, a portable European standard transponder antenna test platform implementation device is developed. This antenna test platform is convenient and easy to carry. It does not require a driver to use it. Only two maintenance personnel are required to cooperate with 1-2 installation tools to complete the assembly and testing. At the same time, the design of this test platform meets the height change requirements of 150mm to 350mm, and judges and confirms the antenna's transmission energy threshold, the accuracy and consistency of the received transponder beacon FSK message data, and the safety of the generation of the positioning signal, and the final test data and report are fed back and stored on the host computer via wireless WIFI.

After searching, the Chinese patent publication number CN206441011U discloses a motion control system for antenna testing, including a test platform, a drive mechanism rail arranged on the test platform, and a drive shaft arranged on the test platform, the drive shaft is linked with the drive motor, and a limit mechanism is provided on the drive mechanism rail, and the limit mechanism includes an inductive proximity switch, a pad for fixing the inductive proximity switch, and an inductive column arranged on the drive mechanism rail. When testing the performance of the base station antenna, the inductive proximity switch cooperates with the inductive column to limit the test range of the probe, reduce the situation where the probe slides out of the radiation field of the base station antenna, and improve the efficiency and accuracy of the antenna test; when testing different base station antennas, the position of the inductive column can be adjusted so that the inductive column meets the test of the base station antenna. However, this antenna test system is aimed at base station antennas, which improves the situation where the accuracy of the object under test is insufficient when testing base station antennas, and cannot meet the measurement requirements of the present invention.

Summary of the invention

The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a portable European standard transponder antenna test platform for use in vehicle depot sites.

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

A portable European standard transponder antenna test platform applied to a vehicle depot site is used to test multiple performance indicators of the European standard transponder antenna installed and used on site. The platform comprises a European standard transponder antenna test control cage, a transponder beacon mobile platform and a host computer application test device; the European standard transponder antenna test control cage is connected to the antenna under test, the beacon corresponding to the antenna under test is installed on the transponder beacon mobile platform, the transponder beacon mobile platform is fixed on the rails of the vehicle depot, and the host computer application test device performs data communication with the European standard transponder antenna test control cage.

Preferably, the European standard transponder antenna test control cage comprises: a European standard transponder antenna interface module, a European standard transponder antenna logic demodulation module, a European standard transponder antenna data processing module, a WIFI wireless data transmission module and a power supply module.

The European standard transponder antenna interface module is respectively connected to the antenna under test and the European standard transponder antenna logic demodulation module through the aviation electrical connection interface, the European standard transponder antenna logic demodulation module is respectively connected to the European standard transponder antenna interface module and the European standard transponder antenna data processing module, the European standard transponder antenna data processing module is connected to the host computer application test equipment through the WIFI wireless data transmission module, and the power supply module connects each module and provides power supplies with different powers and different voltages.

Preferably, the wiring of the European standard transponder antenna interface module is a twisted pair with an external shielded cable; the European standard transponder antenna interface module provides power wiring with an output of no less than 50W for the antenna under test.

Preferably, the European standard transponder antenna logic demodulation module collects the antenna transmission energy threshold self-test signal, the transmission data accuracy verification signal, the FSK beacon message signal and the center point positioning signal transmitted by the European standard transponder antenna interface module through the internal FPGA chip, and demodulates and processes the signal and stores it in a set register to be read and processed by the European standard transponder antenna data processing module;

The European standard transponder antenna data processing module obtains the latest data in the antenna logic demodulation module setting register by reading the instructions on the host computer application test device, and sends it to the WIFI wireless data transmission module in a set data format for subsequent data wireless transmission after processing;

The WIFI wireless data transmission module converts the data in real time when receiving the data sent by the European standard transponder antenna data processing module and sends the data to the host computer application test equipment through the WIFI frame data format.

Preferably, the European standard transponder antenna data processing module is equipped with a wired RS232 interface. When data cannot be transmitted via wireless WIFI, the host computer application test equipment can receive data via the wired interface.

Preferably, the transmission distance of the WIFI wireless data transmission module is not less than 10 meters.

Preferably, the transponder beacon mobile platform comprises a height adjustment rod, a horizontal movement support rod and a beacon guide vehicle;

The beacon is placed on a beacon guide vehicle, which is installed on a horizontally movable support rod. The horizontally movable support rod is connected to a height adjustment rod, which is installed on a rail in a vehicle section. Through the horizontally movable support rod and the height adjustment rod, the beacon can form a relative movement in the horizontal and vertical directions with the antenna to be measured.

Preferably, wheels are provided on both sides of the beacon guide vehicle, and the wheels are placed on a horizontally movable support rod. The beacon is moved in the horizontal direction relative to the antenna to be measured by manually pushing the beacon guide vehicle to slide on the horizontally movable support rod.

Preferably, both ends of the horizontally movable support rod are provided with card slots, and the middle position of the height adjustment rod is provided with two vertical guide columns, and the guide columns are provided with a plurality of grooves, and the card slots match the grooves. By lifting the horizontally movable support rod to a set height and locking it in the corresponding groove, the beacon can complete the vertical movement relative to the antenna under test.

Preferably, the horizontal movable support rod and the height adjustment rod are connected by a bendable connecting mechanical part. When testing is required, the horizontal movable support rod and the height adjustment rod are unfolded, and the fixing screws are screwed on the bendable connecting mechanical part. When the test is completed, the height adjustment rod and the horizontal movable support rod can be folded and placed by removing the fixing screws.

The beacon guide vehicle is equipped with a pullable tape measure, and the height difference between the beacon and the antenna to be measured can be measured by pulling up the tape measure;

The length of the height adjustment rod is 1435 mm, and the length of the horizontal movable support rod is 1500 mm.

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

1. The independent design has realized the portable test platform for the vehicle-mounted European standard transponder antenna by the on-site maintenance personnel of the vehicle depot. This scheme proposes a system structure solution based on track-mounted mechanical parts + fixed beacon + control cage + host computer test interface, which is simple and practical.

2. Based on the proposed system structure, the FPGA logic program for data decoding of the European standard transponder antenna in the control cage and the CPU program for data control were independently designed.

3. Based on the proposed system structure, the WIFI data analysis program in the host computer test interface and the test data judgment and storage program of the antenna function under test were independently designed.

4. Based on the proposed system structure, the on-rail mechanical structure was independently designed, which is easy to install, practical and simple.

5. The present invention innovatively designs part of the European standard transponder antenna interface module, the European standard transponder antenna logic demodulation module, the European standard transponder antenna data processing module and the wireless WIFI data transmission hardware implementation circuit.

6. The present invention provides a high-efficiency and high-availability rail transit in-operation transponder antenna testing solution, which realizes the basic function test of the antenna within the range of 150mm to 350mm from the lower surface of the antenna to the upper surface of the beacon without moving the vehicle, and provides a new field testing solution for domestic research and development and field operation testing of transponder antennas, enriching the innovation in the professional testing field.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a basic structural diagram of a test platform of the present invention;

FIG2 is a schematic diagram of the structure of a transponder beacon mobile platform of the present invention;

FIG3 is a schematic diagram of the structure of the connecting mechanical parts between the horizontally movable support rod and the height adjustment rod of the present invention;

FIG4 is a control flow chart of a transponder antenna test control cage according to the present invention;

FIG5 is a control flow chart of the host computer application test equipment of the present invention.

Among them, 1 is the rail of the vehicle section, 2 is the height adjustment rod, 3 is the horizontal moving support rod, and 4 is the beacon guide car.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

As shown in FIG1 , a portable European standard transponder antenna test platform applied to a vehicle depot site is used to test multiple performance indicators of the European standard transponder antenna installed and used on site. The platform includes a European standard transponder antenna test control cage, a transponder beacon mobile platform and a host computer application test device; the European standard transponder antenna test control cage is connected to the antenna under test, the beacon corresponding to the antenna under test is installed on the transponder beacon mobile platform, the transponder beacon mobile platform is fixed on the depot rail 1, and the host computer application test device performs data communication with the control cage.

The European standard transponder antenna test control cage comprises: a European standard transponder antenna interface module, a European standard transponder antenna logic demodulation module, a European standard transponder antenna data processing module, a WIFI wireless data transmission module and a power supply module.

The European standard transponder antenna interface module is connected to the antenna under test and the European standard transponder antenna logic demodulation module through an aviation electrical connection interface, the European standard transponder antenna logic demodulation module is connected to the European standard transponder antenna interface module and the European standard transponder antenna data processing module, the European standard transponder antenna data processing module is connected to the host computer application test equipment through a WIFI wireless data transmission module, and the power supply module connects each module and provides power supplies with different powers and different voltages.

The wiring of the European standard transponder antenna interface module is a twisted pair with an external shielded cable.

The European standard transponder antenna interface module provides power wiring with an output of no less than 50W for the antenna under test.

The European standard transponder antenna logic demodulation module acquires the energy threshold self-test signal of the antenna to be tested, the transmission data accuracy verification signal, the FSK beacon message signal and the center point positioning signal transmitted by the interface module through the internal FPGA chip, and demodulates and processes the relevant signals and stores them in specific registers to be read and processed by the European standard transponder antenna data processing module.

The European standard transponder antenna data processing module obtains the latest data in the specific register of the antenna logic demodulation module by reading the host computer application test equipment instruction, and sends it to the WIFI wireless data transmission module in a specific data format for subsequent data wireless transmission after processing.

The European standard transponder antenna data processing module is equipped with a wired RS232 interface. When data cannot be transmitted via wireless WIFI, the host computer application test equipment can receive data via the wired interface.

The WIFI wireless data transmission module converts the data in real time when receiving the data sent by the European standard transponder antenna data processing module and sends the data to the host computer application test equipment through the WIFI frame data format.

The transmission distance of the WIFI wireless data transmission module is not less than 10 meters.

Transponder beacon mobile platform part:

The transponder beacon mobile platform is fixed on the rails of the vehicle depot to ensure the horizontality of the beacon guide car during its movement. The beacon is placed on the beacon guide car, and the relative movement between the beacon and the antenna to be tested is completed by manual thrust. After completing a certain height test, the next test can be carried out by lifting the horizontal moving support rod to the corresponding groove of the next required height and locking it. A pullable tape measure is installed under the trolley. Pulling up the tape measure can accurately measure the relative height difference between the beacon and the antenna to be tested. The overall design diagram of the transponder beacon mobile platform is shown in Figure 2.

The transponder beacon mobile platform specifically includes a height adjustment rod 2, a horizontally movable support rod 3 and a beacon guide vehicle 4. The beacon is placed on the beacon guide vehicle 4, which is mounted on the horizontally movable support rod 3. The horizontally movable support rod 3 is connected to the height adjustment rod 2, which is mounted on the rail 1 of the vehicle depot. Through the horizontally movable support rod 3 and the height adjustment rod 2, the beacon can form a relative movement with the antenna under test in the horizontal and vertical directions. Wheels are provided on both sides of the beacon guide vehicle 4, which are placed on the horizontally movable support rod 3. The horizontal movement of the beacon relative to the antenna under test is completed by pushing the beacon guide vehicle 4 to slide on the horizontally movable support rod 3.

Both ends of the horizontally movable support rod 3 are provided with card slots, and the middle position of the height adjustment rod 2 is provided with two vertical guide columns, and the guide columns are provided with a plurality of grooves, and the card slots match the grooves. By lifting the horizontally movable support rod 3 to a required height and locking it in the corresponding groove, the movement of the beacon in the vertical direction relative to the antenna under test can be completed.

The horizontally movable support rod 3 and the height adjustment rod 2 are connected by a bendable connecting mechanical part. When testing is required, the horizontally movable support rod 3 and the height adjustment rod 2 are unfolded, and the fixing screws are screwed on the connecting mechanical part; when the test is completed, the height adjustment rod 2 and the horizontally movable support rod 3 can be folded and placed by removing the fixing screws.

The beacon guide vehicle 4 is provided with a pullable tape measure, and the height difference between the beacon and the antenna to be measured can be measured by pulling up the tape measure.

The length dimension information of the height adjustment rod mechanical parts is 1435mm, and the length dimension information of the horizontal moving support rod mechanical parts is 1500mm. Since the height adjustment rod mechanical parts and the horizontal moving support rod mechanical parts are long, it is not easy to place them in an aviation box when they are idle. Therefore, the height adjustment rod mechanical parts and the horizontal moving support rod mechanical parts are designed with a middle connecting mechanical parts structure as shown in Figure 3. The height adjustment rod mechanical parts and the horizontal moving support rod mechanical parts can be folded and placed in half by removing the fixing screws, which effectively ensures the convenience of placing the height adjustment rod mechanical parts and the horizontal moving support rod mechanical parts.

Upper computer application test interface part:

The host computer application test interface mainly completes data communication with the control cage through WIFI wireless data communication, and saves each test result in the form of fixed text on the host computer.

The control flow chart of the control cage is shown in Figure 4.

The upper computer data acquisition control process is shown in Figure 5.

The present invention provides a high-efficiency and high-availability rail transit in-service transponder antenna testing solution. It realizes the basic function test of the antenna within the range of 150mm to 350mm from the lower surface of the antenna to the upper surface of the beacon without moving the vehicle. It provides a new field test solution for domestic research and development and field operation testing of transponder antennas, enriching the innovation in the professional testing field.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims (4)

1. A portable European standard transponder antenna test platform applied to a vehicle depot site, used to test multiple performance indicators of the European standard transponder antenna installed and used on site, characterized in that: the platform comprises a European standard transponder antenna test control cage, a transponder beacon mobile platform and a host computer application test device; the European standard transponder antenna test control cage is connected to the antenna under test, the beacon corresponding to the antenna under test is installed on the transponder beacon mobile platform, the transponder beacon mobile platform is fixed on the rails of the vehicle depot, and the host computer application test device performs data communication with the European standard transponder antenna test control cage; The European standard transponder antenna test control cage includes: a European standard transponder antenna interface module, a European standard transponder antenna logic demodulation module, a European standard transponder antenna data processing module, a WIFI wireless data transmission module and a power supply module; The European standard transponder antenna interface module is connected to the antenna under test and the European standard transponder antenna logic demodulation module respectively through the aviation electrical connection interface, the European standard transponder antenna logic demodulation module is connected to the European standard transponder antenna interface module and the European standard transponder antenna data processing module respectively, the European standard transponder antenna data processing module is connected to the upper computer application test equipment through the WIFI wireless data transmission module, and the power supply module is connected to each module and provides power supplies of different powers and different voltages for them; The European standard transponder antenna logic demodulation module collects the antenna transmission energy threshold self-test signal, the transmission data accuracy verification signal, the FSK beacon message signal and the center point positioning signal transmitted by the European standard transponder antenna interface module through the internal FPGA chip, and demodulates and processes the signal and stores it in the set register to be read and processed by the European standard transponder antenna data processing module; The European standard transponder antenna data processing module obtains the latest data in the antenna logic demodulation module setting register by reading the instructions on the host computer application test device, and sends it to the WIFI wireless data transmission module in a set data format for subsequent data wireless transmission after processing; The WIFI wireless data transmission module converts the data in real time when receiving the data sent by the European standard transponder antenna data processing module and sends the data to the host computer application test equipment in the WIFI frame data format; The transponder beacon mobile platform comprises a height adjustment rod, a horizontal movement support rod and a beacon guide vehicle; The beacon is placed on a beacon guide vehicle, which is mounted on a horizontally movable support rod, which is connected to a height adjustment rod, which is mounted on a rail in a vehicle depot. Through the horizontally movable support rod and the height adjustment rod, the beacon can form a relative movement with the antenna to be measured in the horizontal and vertical directions. The beacon guide vehicle is provided with wheels on both sides, and the wheels are placed on a horizontally movable support rod, and the beacon is moved in the horizontal direction relative to the antenna to be measured by pushing the beacon guide vehicle to slide on the horizontally movable support rod; The two ends of the horizontal movable support rod are provided with card slots, and the middle position of the height adjustment rod is provided with two vertical guide pillars, and the guide pillars are provided with a plurality of grooves, and the card slots match the grooves. By lifting the horizontal movable support rod to a set height and locking it in the corresponding groove, the beacon can be moved in the vertical direction relative to the antenna under test; The horizontal movable support rod and the height adjustment rod are connected by a bendable connecting mechanical part. When testing is required, the horizontal movable support rod and the height adjustment rod are unfolded, and the fixing screws are screwed on the bendable connecting mechanical part; when the test is completed, the height adjustment rod and the horizontal movable support rod can be folded and placed by removing the fixing screws; a pullable tape measure is installed on the beacon guide vehicle, and the height difference between the beacon and the antenna under test can be measured by pulling up the tape measure; the length of the height adjustment rod is 1435mm, and the length of the horizontal movable support rod is 1500mm; The test platform is designed to meet the requirements of height variation from 150mm to 350mm, and is capable of judging and confirming the antenna’s emission energy threshold, the accuracy and consistency of the transponder beacon FSK message data, and the security of the positioning signal generation. 2. According to claim 1, a portable European standard transponder antenna test platform used in a vehicle depot, characterized in that: the wiring of the European standard transponder antenna interface module is a twisted pair with an external shielded cable; the European standard transponder antenna interface module provides a power wiring with an output of not less than 50W for the antenna under test. 3. According to claim 1, a portable European standard transponder antenna test platform applied to the vehicle depot site is characterized in that: the European standard transponder antenna data processing module is equipped with a wired RS232 interface. When the data cannot be transmitted via wireless WIFI, the host computer application test equipment can receive data through the wired interface. 4. A portable European standard transponder antenna test platform for use at a vehicle depot site according to claim 1, characterized in that the transmission distance of the WIFI wireless data transmission module is not less than 10 meters.