Calibration system and method for time and distance parameters of automobile satellite navigation tester
A technology of satellite navigation and calibration system, applied in satellite radio beacon positioning systems, radio wave measurement systems, instruments, etc., can solve the problems of low calibration accuracy, large uncertainty, and asynchronous start and end time.
Active Publication Date: 2021-10-26
武汉达安科技有限公司
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Problems solved by technology
The above-mentioned calibration method has limitations in the venue, the uncertainty introduced by human factors is large, the start and end of time are not synchronized, the start and end positions of the vehicle have large errors, and the calibration accuracy is not high.
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[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] figure 1 Among them, the present invention includes a satellite navigation signal simulator 2, a car satellite navigation tester 5 to be tested, a multi-channel synchronous trigger device 4, a clock synchronization board 3, and a control computer 1;
[0035] Satellite navigation signal simulator 2 is used for generating radio frequency navigation signal;
[0036] The car satellite navigation tester 5 to be schooled receives the radio frequency navigation signal that the satellite navigation signal simulator 2 sends, and generates corresponding navigation information;
[0037] The clock synchronization board 3 input port is connected with the clock output port of the satellite navigation signal simulator 2, and receives the pps signal from the satellite navigation signal simulator 2 output, and is used to synchronize its own cl...
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The invention relates to a calibration system and method for time and distance parameters of an automobile satellite navigation tester. The calibration system includes a satellite navigation signal simulator, an automobile satellite navigation tester to be tested, a clock synchronization board, a multi-channel synchronization trigger device, and a control computer ; The input terminal of the clock synchronization board is connected with the clock output port of the satellite navigation signal simulator to receive the pps signal output from the satellite navigation signal simulator, and the output terminal is connected to multiple input ports of the multi-channel synchronous trigger device in parallel, and the multi-channel synchronous trigger A plurality of output ends of the device are connected in parallel to the trigger interfaces of a plurality of automotive satellite navigation testers to be schooled; the output ends of the control computer are connected to the input end of the satellite navigation signal simulator and the input end of the clock synchronization board, and the pulse is transmitted by the multi-channel synchronous trigger device. The signal is converted into a contact signal to control the triggering start / stop of the car satellite navigation tester corresponding to the school; improve the accuracy of the time and distance calibration of the car navigation tester.
Description
technical field [0001] The invention relates to the technical field of calibration of an automobile satellite navigation tester, in particular to a calibration system and method for a time parameter and a distance parameter of an automobile satellite navigation tester. Background technique [0002] The car satellite navigation tester is widely used in the vehicle performance test, which can measure the speed parameter, time parameter, distance parameter and positioning position of the vehicle. In order to ensure the accuracy of the above parameter data measurement, the speed parameter of the car satellite navigation tester , time parameter, distance parameter, positioning position for calibration. The traditional distance calibration method is to mark the starting and ending line with a distance of 100 meters on a specific site, and the driver drives the vehicle to mark the distance, record the distance traveled by the car satellite navigation tester, and make a difference f...
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IPC IPC(8): G01S19/23
CPCG01S19/235
Inventor 周荣华刘茹李昕涂远扬叶仁根
Owner 武汉达安科技有限公司