Object detector for mobile robot

The utility model discloses an object detector for mobile robot, which comprises an ultrasonic transceiving sensor, an analog signal conditioning circuit, a central control unit and a power drive circuit, wherein the ultrasonic transceiving sensor is used for transmitting ultrasonic wave and detecting the return signals, and converting the returned signals into analog signals if the return signals exist; the analog signal conditioning circuit is used for conducting amplification, wave filtration, peak extraction and reshaping on the analog signals; the central control unit is used for conducting digital wave filtration on the signals conditioned by the analog signal conditioning circuit, calculating the distance between the mobile robot and the object in front, comparing the obtained value with a set value and giving an alarm if the obtained value is less than the set value; and the power drive circuit is used for driving the ultrasonic transceiving sensor to emit ultrasonic wave with corresponding length. The object detector for mobile robot can effectively detect the object and the distance between the object and the robot, and covers the area needing to be detected, wherein the robot walks on the area.