Method and system for testing residual vibration and sensitivity of ultrasonic sensor
A test method and test system technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of inaccurate results and large manpower, and achieve the effects of ensuring product quality, facilitating process operations, and saving manpower
Active Publication Date: 2021-10-08
清华大学苏州汽车研究院(吴江) +1
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Problems solved by technology
However, this test system cannot perform batch tests, requires a lot of manpower, and only uses time or voltage waveforms to test and judge, and the results obtained are often inaccurate
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[0033] The preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0034] Such as figure 1 As shown, the ultrasonic sensor residual vibration and sensitivity testing system in the present invention includes a sensor fixture, a sensor ECU box, a USB data acquisition card, residual vibration and sensitivity testing software and a code scanning gun.
[0035] 1. Sensor aftershock and sensitivity adjustment jig, as shown in the attached picture figure 1 As shown, it is used to install the ultrasonic sensor for aftershock and sensitivity adjustment test;
[0036] 2. The sensor ECU box is connected with the aftershock and sensitivity adjustment fixture of the sensor, and is actually connected with the ultrasonic sensor to control the wave sending and receiving of the sensor;
[0037] 3. The USB data acquisition card is used to sample the sending and receiving waves of the ultrasonic sensor, and transmit the sam...
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The invention discloses an ultrasonic sensor residual vibration and sensitivity test system, comprising: a sensor fixture for fixing the ultrasonic sensor; a sensor ECU box connected to the ultrasonic sensor to control the wave sending and receiving of the ultrasonic sensor; a USB data acquisition card, It is used to sample the sending and receiving waves of the ultrasonic sensor, and transmit the sampled data to the host computer through the USB data cable; the host computer is installed with residual vibration and sensitivity test software, and the residual vibration and sensitivity test software provides a human-computer interaction interface. To display the collected data in the form of a waveform diagram, calculate the after-vibration time and echo voltage of the ultrasonic sensor, and test the after-vibration time and echo voltage of the ultrasonic sensor respectively. If the after-vibration time and echo voltage test are both If the test is passed, the aftershock and sensitivity test results of the ultrasonic sensor are passed, and the judgment results of each sensor are displayed. The test system can carry out systematic batch tests, which is convenient for process operation and greatly improves the test accuracy.
Description
technical field [0001] The invention belongs to the technical field of ultrasonic sensor testing, in particular to an ultrasonic sensor residual vibration and sensitivity testing method and system. Background technique [0002] With the continuous development of the automobile industry, various vehicle-mounted terminals emerge in an endless stream. The ranging function is one of the basic functions of each terminal device. Ultrasonic has strong penetrating power, small attenuation, and strong reflection ability, and is not sensitive to light, color, and electromagnetic fields. It is not easily affected by bad weather, the principle of ranging is simple, the accuracy of ranging is high, and the cost is low. Its application range is also expanding. [0003] The two performance indicators of aftershock and sensitivity are mutually restrictive. All processes that reduce aftershock will lead to a decrease in sensitivity; and all processes that increase sensitivity will increase a...
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IPC IPC(8): G01S7/52
CPCG01S7/52
Inventor 郁宏吕英超戴一凡
Owner 清华大学苏州汽车研究院(吴江)