Isolation Switch on State of Non-Contact Automatic Detection Method

A non-contact automatic detection method based on a laser displacement sensor is adopted to improve the effect of automatic detection of the isolation switch's closing state. Enhancing the laser displacement sensor's resolution to its maximum potential involves optimizing its optical parameters and refining its accuracy in displacement measurement. The isolation switch contour curve is collected through the laser displacement sensor with optimized optical parameters, and the isolation switch contour curve sampling point set is obtained. Using the least square method, the elliptic equation of the sampling point of the isolation switch contour curve is fitted, and the angle between the conductive arm and the horizontal direction is calculated. When the angle of the conductive arm is within the specified interval, the reasonable switch closing is determined to be in place, and the non-contact automatic detection of the isolation switch closing state is completed. The results obtained from the experiment indicate that the angle of the front and back conductive arms calculated by this method is about $0.4^{\circ}$ and $0.5^{\circ}$, respectively, which is lower than the specified interval of the angle. The results indicate that this result helps realize the non-contact automatic detection of the isolation switch.