Moving object detection device using ultrasonic sensor, method thereof, and warning system using the same

A warning system of a vehicle, the warning system comprising:

• a moving object detection device configured to:
• divide a sensing distance of an ultrasonic sensor into a plurality of regions;
• when an intensity of a reflected signal of the plurality of reflected signals exceeds a predetermined threshold in a region of the plurality of regions, detect a region of the plurality of regions as a region of interest (ROI);
• and
• detect a moving object based on changes in the ROI;
• a display device configured to output a warning message or image;
• a warning device configured to output various warning sounds;
• and
• a control device configured to:
• when the moving object detection device detects a stationary object, output, with the display device, the warning message or image;
• and
• when the moving object detection device detects a moving object, warn, with the display device and the warning device, a driver.