Turn button control-adjustment method and system of vehicle-mounted encoder

Abstract

The invention provides a turn button control-adjustment method and system of a vehicle-mounted encoder. The potentials of a phase-A port and a phase-B port of an encoder circuit are collected every first preset time, and whether the collected potentials change in the first preset time is determined; if the potentials change, whether the phase-A port and a phase-B port output effective waveforms is determined, and if yes, the turning direction and adjustment amount of the turn button of the encoder are determined according to the effective waveforms, and a control and adjustment circuit implements corresponding adjustment. Thus, waveforms generated by jittering of a vehicle are prevented from interfering the turning and adjustment of the turn button of the encoder, and the vehicle-mounted encoder can realize accurate control and adjustment.

Description

technical field [0001] The invention relates to the field of vehicle navigation multimedia products, in particular to a method and system for controlling and adjusting a vehicle encoder knob. Background technique [0002] The encoder is a commonly used control button for car navigation multimedia products. Users can adjust the volume, radio channel, etc. through the encoder button on the panel. [0003] The encoders commonly used in car navigation multimedia products are contact mechanical (incremental), and some jitter signals will be generated during manufacturing and use. The jitter during the manufacturing process includes: burrs produced by metal punching; unevenness and overflow of glue at the lap joint when the hardware is implanted in plastic. During use, there will be some miscellaneous debris due to the friction between the contact brush and the metal contact sheet and plastic, which will cause the jitter signal, making the output waveform of the product different...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method and system for controlling and adjusting the knob of the on-board encoder to solve the problem that the on-board encoder may fail when it encounters vibration in the prior art. Waveform signal, resulting in the defect that after the encoder knob is rotated, the volume of the car navigation multimedia product cannot meet the needs of the user

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