Method and system for testing residual vibration and sensitivity of ultrasonic sensor
A test system and test method technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as large manpower and inaccurate results, and achieve the effects of ensuring product quality, facilitating process operations, and improving test accuracy.
Active Publication Date: 2018-06-29
清华大学苏州汽车研究院(吴江) +1
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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 a system for testing residual vibration and sensitivity of an ultrasonic sensor. The system comprises: a sensor jig, for fixing an ultrasonic sensor; a sensor ECU box, connected with the ultrasonic sensor to control wave transmitting and receiving of the ultrasonic sensor; a USB data acquisition card, for sampling transmitted and received waves of the ultrasonic sensor andtransmitting sampled data to an upper computer through a USB data line; and an upper computer, provided with residual vibration and sensitivity testing software which provides a man-machine interaction interface, and is used for displaying the sampled data in an oscillogram mode, calculating a residual vibration time and an echo voltage of the ultrasonic sensor, and respectively testing the residual vibration time and echo voltage of the ultrasonic sensor, wherein if the residual vibration time and echo voltage tests pass, the residual vibration and sensitivity testing results of the ultrasonic sensor pass, and a judgment result of each sensor is displayed. The testing system can carry out systematic batch testing, is convenient for process operation and greatly improves the testing 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)