Proximity switch and method of adjusting sensitivity therefor

摘要

A vehicle proximity switch and method are provided having sensitivity control. The switch includes a proximity sensor, such as a capacitive sensor, installed in a vehicle and providing a sense activation field. Control circuitry processes the activation field to sense user activation of the switch by comparing the activation field to a threshold. The threshold is adjusted down when a substantially stable sensor signal is detected below the threshold for a minimum time period, and the threshold is adjusted up when a sensor signal greater than the threshold by a predetermined value is detected.

主权项

1. A proximity switch having sensitivity control comprising:
a proximity sensor providing a sense activation field and generating a signal; and control circuitry detecting activation of the proximity switch based on the signal compared to a threshold and adjusting the threshold to control sensitivity, wherein the threshold is decreased when the signal is less than the threshold for a minimum time period, and is increased when a peak value of the signal exceeds the threshold by a predetermined value.