Distance measuring apparatus and distance measuring method

A distance measuring apparatus, comprising:

• a global positioning system (GPS) module configured to generate a pulse signal;
• an ultrasound transceiver module configured to generate and transmit a first ultrasound signal and receive a second ultrasound signal transmitted from an object;
• and
• a control module electrically coupled to the GPS module and the ultrasound transceiver module,
• wherein when the control module receives the pulse signal, the control module controls the ultrasound transceiver module to generate and transmit the first ultrasound signal, and determines whether the ultrasound transceiver module receives the second ultrasound signal within a first interval,
• wherein when the ultrasound transceiver module receives the second ultrasound signal within the first interval, the control module determines a distance between the distance measuring apparatus and the object according to a time difference between receiving the second ultrasound signal and transmitting the first ultrasound signal.