Patent ID: 9678207
Date: 2017-06-13
CPC Classifications: G01S

Claim:
1. An object detection device comprising: a controller; a first sensor that receives a first control signal from the controller and transmits a first energy wave to a first region; and a second sensor that receives a second control signal from the controller and transmits a second energy wave to a second region partially overlapping with the first region, wherein the first sensor is configured to receive a reflected wave of the first energy wave, convert the reflected wave into a first self-signal, and transmit the first self-signal to the controller, and to receive a reflected wave of the second energy wave, convert the reflected wave into a first correspondence signal, and transmit the first correspondence signal to the controller, the second sensor is configured to receive the reflected wave of the second energy wave, convert the reflected wave into a second self-signal, and transmit the second self-signal to the controller, and to receive the reflected wave of the first energy wave, convert the reflected wave into a second correspondence signal, and transmit the second correspondence signal to the controller, the controller is configured to detect an object based on the first self-signal, the first correspondence signal, the second self-signal, and the second correspondence signal, and when the second correspondence signal is equal to or above a threshold, and the first self-signal is below the threshold, the controller determines that a foreign substance is adhered on the first sensor.