The detection method of the movement state of the instrument pointer
A motion state and meter pointer technology, applied in the field of meter pointer motion state detection, can solve problems such as lack of guidance and inability to objectively reflect the pointer motion state, and achieve the effect of ensuring accuracy
Active Publication Date: 2016-05-25
QINGDAO DONGTIAN INTELLIGENT TECH CO LTD
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Problems solved by technology
[0005] Although the above-mentioned patents use computer and image recognition technology to replace manual detection and judgment, they can only make a judgment on whether the pointer finally points to the qualified range of detection, and cannot objectively reflect the motion state of the pointer in the smooth motion stage. Therefore, such methods only It is a detection method that statically indicates the pass rate, and lacks guidance in implementation
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Embodiment 1
[0050] Example 1, such as figure 1 As shown, the hardware device implementing the present invention includes a computer, a camera, a car dashboard and a signal simulation generator. After receiving the computer instruction, the signal simulation generator will simulate the signal output of the relevant sensor, send the analog signal to the instrument panel, and prompt the instrument pointer to make a corresponding action. The camera records the movement process of the pointer through continuous shooting, and transmits the obtained images to the computer. The computer uses a certain image processing method to identify the pointer, and judges the movement state of the pointer by analyzing the change of the speed of the pointer.
[0051] Such as Figure 2 to Figure 7 As shown, the speedometer is taken as an example to illustrate the specific implementation steps:
[0052] 1. Use the signal simulation generator to output the lower limit position signal of the pointer, and at th...
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The invention relates to an instrument pointer movement state detection method, aiming at solving the problems existing in the prior art, realizing the automatic speed measurement of a pointer through an image visual identification technology by means of computer data acquisition and image processing, judging the operation stability of the pointer by analyzing the situation of speed fluctuation of the pointer at a stable operation stage and realizing the detection of the point movement state. Specifically, on the basis of identifying the pointer in an instrument image and recording the gravity center W changing process of the pointer from a lower limit position to an upper limit position, the rotating center point O of the pointer and the azimuth angle of each point gravity center W and the transient rotating speed Vi of the pointer at the stable operation stage are calculated; whether the movement state of the instrument pointer is abnormal or not is evaluated by judging whether the transient speed Vi exceeds an allowable range or not.
Description
technical field [0001] The detection method of the movement state of the instrument pointer of the invention relates to the performance detection of various types of parameter values such as automobile dashboards. Background technique [0002] The dynamic characteristics of the vehicle instrument reflect the operation performance of the instrument pointer under the actual operating conditions, which mainly includes the sensitivity, anti-interference ability, and smooth operation of the instrument. The dynamic characteristics of the automobile instrument reflect the operation performance of the instrument pointer under the actual operating conditions of the automobile, and the smoothness of the pointer movement is an important indicator reflecting the dynamic characteristics. There are many factors that affect the smoothness of pointer operation. If the position and direction of the pressing needle are not grasped during the process of assembling the pointer, the needle sh...
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IPC IPC(8): G01D18/00
Inventor 马勇男车秀玉吕清宝王晓波
Owner QINGDAO DONGTIAN INTELLIGENT TECH CO LTD