Object detection system, object detection method and object detection device

An object detection method comprising:

• setting, as a top of a wave transmission order, one of distance measurement sensors provided at different positions from each other in a vehicle, a detection range of the one of the distance measurement sensors covering a region where an object is located, the object having been detected through preliminary detection when power supply to the vehicle is started;
• repeating cyclic wave transmission control on the distance measurement sensors to emit ultrasonic waves sequentially in the wave transmission order;
• and
• determining an object as a detection target object when any one of the distance measurement sensors has detected the object a predetermined number of times.

An object detection device comprising:

• a hardware processor connected to a memory configured to function as:
• a wave transmission control circuit serving to
• set one of distance measurement sensors as a top of a wave transmission order, a detection range of the one of the distance measurement sensors covering a region where an object is located, the object having been detected through preliminary detection when power supply to the vehicle is started, and
• repeat a cyclic wave transmission control on the distance measurement sensors to emit ultrasonic waves sequentially in the wave transmission order;
• and
• a determination circuit serving to determine an object as a detection target object when any one of the distance measurement sensors has detected the object a predetermined number of times,
• wherein the distance measurement sensors are provided at different positions from each other in the vehicle, the distance measurement sensors each including a wave transmitter to emit ultrasonic waves and a wave receiver to receive reflected ultrasonic waves reflected at an object.