Vehicle-mounted satellite positioning system testing method suitable for finished vehicle offline detection

Abstract

The invention relates to the technical field of vehicle-mounted satellite positioning production line detection, and discloses a vehicle-mounted satellite positioning system testing method suitable for finished vehicle offline detection, which comprises the following steps of: 1, isolating interference of external satellite signals through a signal shielding system; 2, transmitting a satellite analog signal to a signal shielding system, transmitting the satellite analog signal to a first antenna unit at a vehicle end, and moving the signal shielding system to a position above a vehicle roof; 3, controlling a signal shielding system through a control system, configuring, starting and stopping a signal source, obtaining vehicle end data, analyzing test data, and outputting a result; according to the invention, the whole station does not need to be contained in a closed shielding chamber, and only a shielding cover above the station needs to be used for shielding, so that the site requirement is more flexible, interference with other equipment is avoided, and a satellite positioning performance test can be smoothly implemented on the premise that a vehicle is limited by various conditions on the whole vehicle off-line detection station; compared with a shielding room, the signal shielding system uses less shielding materials and is low in maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted satellite positioning production line detection, and in particular to a vehicle-mounted satellite positioning system testing method suitable for vehicle off-line detection. Background Art

[0002] With the promotion and development of intelligent network technology, the positioning capability of vehicles has gradually become one of the key indicators of intelligent networked vehicles, and it is the basis for the realization of functions such as V2X and high-level unmanned driving. Therefore, for intelligent networked models, satellite positioning testing is an indispensable test link in the mass production and offline process. The current detection and positioning system is usually carried out in a shielded room to isolate the interference of external satellite signals. However, there are a series of problems in deploying a shielded room to accommodate the whole vehicle on the production line. For example, it is difficult to implement, and the subsequent maintenance is cumbersome. It is also necessary to leave enough safe space for adjacent workstations. It cannot be applied to the production line detection link. For this reason, a vehicle-mounted satellite positioning system test method suitable for the offline detection of the whole vehicle is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a vehicle-mounted satellite positioning system testing method suitable for off-line inspection of whole vehicles, so as to solve the problems proposed in the above background technology that a shielded room accommodating whole vehicles is deployed on the production line, such as the difficulty in implementation, the cumbersome maintenance in the later stage, and the need to leave enough safety space for adjacent workstations, which makes it difficult to apply to the production line inspection link.

[0004] To achieve the above object, the present invention provides the following technical solution: a vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing, comprising the following steps:

[0005] Step 1: Use a signal shielding system to isolate interference from external satellite signals;

[0006] Step 2: The signal shielding system is moved above the roof of the vehicle by transmitting a satellite analog signal to the signal shielding system and transmitting the signal to the first antenna unit at the vehicle end;

[0007] Step 3: Control the signal shielding system through the control system, configure and start and stop the signal source, obtain vehicle-side data, test data analysis, and output the results.

[0008] Preferably, in the above step 1, the signal shielding system includes a shielding cover module, a second antenna unit and a mobile module, the second antenna unit is arranged inside the shielding cover module, and the mobile module is arranged on the top of the shielding cover module.

[0009] Preferably, the shielding cover module is used to install the second antenna unit and the mobile module;

[0010] The second antenna unit is used to transmit the simulated satellite radio frequency signal generated by the signal source to the first antenna unit at the vehicle end;

[0011] The moving module is used to move the shielding cover module to above the vehicle roof.

[0012] Preferably, in the above step 2, the second antenna unit in the shielding cover module is connected to the test signal source, the simulated satellite RF signal generated by the signal source is transmitted to the first antenna unit on the vehicle side, and the shielding cover module is moved to the top of the vehicle by the moving module.

[0013] Preferably, in the above step three, the control system controls the signal source to send out a satellite simulation signal, controls the satellite receiver on the vehicle to clear the real satellite signal, and re-searches the satellite and receives the satellite simulator signal, then analyzes the vehicle-side positioning data and outputs the result.

[0014] Preferably, in the above step three, the control system includes a PLC unit, an industrial computer and a test unit.

[0015] Preferably, the above-mentioned PLC unit is used to control the moving module to drive the shielding cover module to move to the position of the first antenna unit on the roof, return the shielding cover module to the default position after the test is completed, detect whether the vehicle is at the work station, emergency stop, reset, alarm, and control the status of the three-color light during system operation.

[0016] Preferably, the PLC unit and the test unit are used to obtain the vehicle model, start / stop the test, and trigger the signal shielding system to move to the antenna position above the corresponding vehicle roof;

[0017] Configure the parameters of the test signal source in real time and control the start and stop of the signal source;

[0018] Interact with the vehicle and the instrument, analyze and compare the acquired vehicle data with the standard data of the instrument, and output the results;

[0019] Record the test process and the data generated during the test for easy traceability;

[0020] Monitor the entire test process and handle various abnormal situations, including abnormalities reported by instruments, vehicles and PLC controllers;

[0021] Count the number of tests, the number of successes / failures;

[0022] Display the test status and test progress;

[0023] System parameter setting and saving;

[0024] System attribute information display;

[0025] Generate local test reports and upload final results to the cloud system.

[0026] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0027] 1. The present invention does not need to use a closed shielding room to contain the entire workstation. It only needs to use a shielding cover above the workstation for shielding. The site requirements are more flexible, avoiding interference with other equipment, and the implementation is also simpler. It can enable the vehicle to smoothly implement satellite positioning performance testing under the premise of being restricted by various conditions at the vehicle off-line inspection station.

[0028] 2. Compared with the shielding room, the signal shielding system of the present invention uses less shielding material and has lower maintenance cost.

[0029] 3. The shielding cover module of the present invention is directly above the vehicle-end antenna but does not contact it, which not only protects the vehicle from damage but also can utilize the characteristics of the receiver to accurately test the positioning and timing effects; and the setting of the shielding cover module and the mobile module allows the shielding cover module to adapt to the installation positions of different antennas of different vehicle models and meet the needs of mixed-line production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the signal shielding system of the present invention;

[0032] Figure 2 It is a schematic diagram of the test system of the present invention;

[0033] Figure 3 It is a schematic diagram of the shielding area of ​​the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the testing method of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0037] Example

[0038] In the existing technology, there are a series of problems when deploying a shielded room to accommodate the entire vehicle on the production line. For example, it is difficult to implement, and the subsequent maintenance is cumbersome. It also requires leaving enough safe space for adjacent workstations, which makes it unsuitable for the production line inspection link.

[0039] See also Figure 1-4 The present invention provides a technical solution: a vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing, comprising the following steps:

[0040] Step 1: Use a signal shielding system to isolate interference from external satellite signals;

[0041] Step 2: The signal shielding system is moved above the roof of the vehicle by transmitting a satellite analog signal to the signal shielding system and transmitting the signal to the first antenna unit at the vehicle end;

[0042] Step 3: Control the signal shielding system through the control system, configure and start and stop the signal source, obtain vehicle-side data, test data analysis, and output the results.

[0043] In step 1, the signal shielding system includes a shielding cover module, a second antenna unit and a moving module, wherein the second antenna unit is arranged inside the shielding cover module, and the moving module is arranged on the top of the shielding cover module.

[0044] A shielding cover module for mounting the second antenna unit and the mobile module;

[0045] The second antenna unit is used to transmit the simulated satellite radio frequency signal generated by the signal source to the first antenna unit at the vehicle end;

[0046] The moving module is used to move the shielding cover module above the vehicle roof.

[0047] In step two, the second antenna unit in the shielding cover module is connected to the test signal source, the simulated satellite radio frequency signal generated by the signal source is transmitted to the first antenna unit at the vehicle end, and the shielding cover module is moved to the top of the vehicle through the moving module.

[0048] In step three, the control system controls the signal source to send out a satellite simulation signal, controls the satellite receiver on the vehicle to clear the real satellite signal, and re-searches the satellite and receives the satellite simulator signal, then analyzes the vehicle-side positioning data and outputs the result.

[0049] In step three, the control system includes a PLC unit, an industrial computer and a test unit.

[0050] The PLC unit is used to control the moving module to drive the shielding cover module to move to the position of the first antenna unit on the roof, return the shielding cover module to the default position after the test is completed, detect whether the vehicle is at the work station, emergency stop, reset, alarm, and control the status of the three-color light during system operation.

[0051] PLC unit and test unit, used to obtain vehicle model, start / stop test, trigger signal shielding system to move to the antenna upper position above the corresponding vehicle roof;

[0052] Configure the parameters of the test signal source in real time and control the start and stop of the signal source;

[0053] Interact with the vehicle and the instrument, analyze and compare the acquired vehicle data with the standard data of the instrument, and output the results;

[0054] Record the test process and the data generated during the test for easy traceability;

[0055] Monitor the entire test process and handle various abnormal situations, including abnormalities reported by instruments, vehicles and PLC controllers;

[0056] Count the number of tests, the number of successes / failures;

[0057] Display the test status and test progress;

[0058] System parameter setting and saving, such as parameters of the vehicle to be tested, test scenario, and log storage;

[0059] Display of system attribute information, such as version number and vendor name;

[0060] Generate local test reports and upload final results to the cloud system.

[0061] The signal muting system is moved into place:

[0062] The user clicks "Start Test" on the UI, and the control system obtains information from the vehicle and notifies the signal shielding system;

[0063] The shielding cover module is moved to a position just above the first antenna unit at the vehicle end so that the shielding cover module can provide Figure 3 The shielding effectiveness is as shown in Table 1, and it does not come into contact with the vehicle and does not damage the vehicle. As shown in Table 1:

[0064]

[0065] Satellite simulator on:

[0066] The control system test signal source is put into operation to transmit a satellite radio frequency signal that meets the test requirements;

[0067] At this time, the shielding cover module of this station has three kinds of navigation satellite RF signals (Table 2), the test signal of this station (S1), the external satellite signal (S2), and the test signal of the neighboring station (S3).

[0068] Table 2

[0069]

[0070] Cold start of the vehicle:

[0071] After the signal shielding system is moved into place and the satellite simulator is turned on, the system controls the vehicle to enter the cold start state;

[0072] According to the working principle of satellite positioning, cold start can clear the ephemeris and almanac cached in the vehicle's satellite positioning receiver and restart the satellite search. At this time, the receiver will prioritize searching for satellite signals with better angles and signal strength for positioning calculations;

[0073] Using this principle, after the signal shielding system is moved into place and the satellite simulator is turned on, the vehicle satellite positioning receiver will lock the test signal (S1) of this station for positioning calculation.

[0074] The control system obtains vehicle data:

[0075] The system obtains the timing and positioning information from the vehicle through communication.

[0076] Compare the vehicle data with the test signal source data and output the test conclusion:

[0077] Compare the data from the vehicle computer with the data from the test signal source, calculate the test results, and output the results to the user.

[0078] In summary, the present invention does not need to use a closed shielding room to contain the entire workstation, but only needs to use a shielding cover above the workstation for shielding. The site requirements are more flexible, avoiding interference with other equipment, and the implementation is simpler. It can enable the vehicle to smoothly implement satellite positioning performance testing under the premise of being restricted by various conditions at the vehicle offline inspection station; compared with the shielding room, this signal shielding system uses less shielding material and has low maintenance costs; the shielding cover module is directly above the vehicle-end antenna but does not contact it, which not only protects the vehicle from damage, but also can use the characteristics of the receiver to accurately test the positioning and timing effects; and the setting of the shielding cover module and the mobile module, the shielding cover module adapts to the installation positions of different antennas of different vehicle models, and can meet the needs of mixed-line production.

[0079] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing, characterized in that: The following steps are involved: Step 1: Use a signal shielding system to isolate interference from external satellite signals; Step 2: The signal shielding system is moved above the roof of the vehicle by transmitting a satellite analog signal to the signal shielding system and transmitting the signal to the first antenna unit at the vehicle end; Step 3: Control the signal shielding system through the control system, configure and start and stop the signal source, obtain vehicle-side data, test data analysis, and output the results.

2. The vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing according to claim 1, characterized in that: In step 1, the signal shielding system includes a shielding cover module, a second antenna unit and a moving module, wherein the second antenna unit is arranged inside the shielding cover module, and the moving module is arranged on the top of the shielding cover module.

3. The vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing according to claim 2, characterized in that: The shielding cover module is used to install the second antenna unit and the mobile module; The second antenna unit is used to transmit the simulated satellite radio frequency signal generated by the signal source to the first antenna unit at the vehicle end; The moving module is used to move the shielding cover module to above the vehicle roof.

4. The vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing according to claim 1, characterized in that: In step two, the second antenna unit in the shielding cover module is connected to the test signal source, the simulated satellite radio frequency signal generated by the signal source is transmitted to the first antenna unit at the vehicle end, and the shielding cover module is moved to the top of the vehicle through the moving module.

5. The vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing according to claim 1, characterized in that: In step three, the control system controls the signal source to send out a satellite simulation signal, controls the satellite receiver on the vehicle to clear the real satellite signal, and re-searches the satellite and receives the satellite simulator signal, then analyzes the vehicle-side positioning data and outputs the result.

6. The vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing according to claim 1, characterized in that: In step three, the control system includes a PLC unit, an industrial computer and a test unit.

7. A vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing according to claim 6, characterized in that: The PLC unit is used to control the moving module to drive the shielding cover module to move to the position of the first antenna unit on the roof, return the shielding cover module to the default position after the test is completed, detect whether the vehicle is at the work station, emergency stop, reset, alarm, and control the status of the three-color light during system operation.

8. The vehicle-mounted satellite positioning system testing method suitable for vehicle off-line testing according to claim 6, characterized in that: The PLC unit and the test unit are used to obtain the vehicle model, start / stop the test, and trigger the signal shielding system to move to the antenna upper position above the corresponding vehicle roof; Configure the parameters of the test signal source in real time and control the start and stop of the signal source; Interact with the vehicle and the instrument, analyze and compare the acquired vehicle data with the standard data of the instrument, and output the results; Record the test process and the data generated during the test for easy traceability; Monitor the entire test process and handle various abnormal situations, including abnormalities reported by instruments, vehicles and PLC controllers; Count the number of tests, the number of successes / failures; Display the test status and test progress; System parameter setting and saving; System attribute information display; Generate local test reports and upload final results to the cloud system.

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