Automatic calibration method of pointer type automobile meter

Abstract

The invention discloses an automatic calibration method of a pointer type automobile meter based on an HIS model and Hough conversion. Aiming at the characteristic of rich color information of the automobile meter and shadow phenomenon existing at the periphery of a target area when collecting images, an instrument panel image under an RGB model is converted into the HIS model so as to eliminate shadow influence; tone and saturation component are utilized as characteristic parameters to carry out image segmentation; Hough conversion is used for detecting targets; and finally, deflection anglescorresponding to zero calibration tail when the pointer points to major calibration tails are respectively calculated and compared with corresponding standard deflection angles, and if the result exceeds permissible error range, readjustment needs to be carried out. The automatic calibration method can effectively improve the calibration correction rate and efficiency of the pointer type automobile meter, and provides powerful means for automatic production of the automobile meter.

Description

technical field [0001] The invention relates to an automatic inspection technology of an automobile meter when leaving the factory, in particular to an automatic inspection method for a pointer type automobile meter based on an HSI model and a Hough transformation. Background technique [0002] In the production of mainstream pointer-type automotive meters, meter pointer calibration is a very repetitive task, which requires calibration personnel to calibrate each adjustment scale point of each meter head. During this period, the meter is often readjusted due to the difference in the accuracy of the scale between the calibration personnel and the previous meter adjustment workers. The rework rate due to human understanding factors is relatively high, which seriously affects the production efficiency. Moreover, once the calibrator relaxes a little during the work process, the previous meter adjustment errors will be missed. Many instrument manufacturers have missed inspection...

AI Technical Summary

Problems solved by technology

During this period, the meter is often readjusted due to the difference in the accuracy of the scale between the calibration personnel and the previous meter adjustment workers. The rework rate due to human understanding factors is relatively high, which seriously affects the production efficiency.

Moreover, once the calibrator is a little relaxed during the work process, the previous meter adjustment errors will be missed.

Many instrument manufacturers have missed inspections of a certain scale point (more than zero) on a certain meter head, resulting in a certain range of pointers on the vehicle not responding or inaccurate, resulting in batch returns

Under the background that manual production and calibration are still dominant at present, no matter how much emphasis is placed on the institutionalization of management, the above situation cannot be completely eradicated. This has become one of the important factors for the low quality of mass production of domestically produced automotive instruments

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