一种电容传感器检测定位扬声器接线端子的方法

A Capacitive Sensor Detects the Speaker Terminals Positioning Method

基于平面电容传感器原理,提出一种应用于扬声器接线端子定位检测系统的新型电容传感器,可以有效检测定位扬声器接线端子。介绍了这种电容传感器的设计,描述了电容传感器用于检测扬声器接线端子的基本方法;并给出了相应的电路模型。根据扬声器接线端子的外形特点来确定电容传感器的最优设计。实验结果表明:电容传感器对扬声器接线端子区域较敏感,电容-频率变换振荡器输出频率为51 k Hz左右的波形,相对频率差约5 k Hz。通过检测振荡器的频率变化,运用自学习均值滤波频率采集算法可实现扬声器接线端子的非接触检测定位。

Based on planar capacitive sensor principle, a new capacitive sensor applied to the speaker terminals location detection system can effectively detect the positioning speaker terminals was proposed. An overview of this capacitive sensor design, basic methods capacitive sensor for detecting speaker terminals was described, and the corresponding circuit model was determined the optimal design of capacitive sensor according to the speaker termi- nals of shape characteristics. The results show that ： the speaker terminals capacitive sensor more sensitive area, ca- pacitance-frequency conversion oscillator output frequency is around 51 kHz waveform, the relative frequency differ- ence of about 5 kHz, by detecting changes in the oscillator frequency, using self-learning mean filter frequency ac- quisition algorithm speaker terminals can achieve a non-contact detection and location.