Ultrasonic distance sensor and method of measuring location of object using ultrasonic distance sensor

A method of measuring a location of an object by using an ultrasonic distance sensor, the ultrasonic distance sensor comprising a signal generator, a gating switch, a transmitter, a receiver, and a signal processor, the method comprising:

• generating, by using the signal generator, a continuous ultrasonic signal array that is frequency modulated;
• performing, by using the gating switch, time gating to allow part of ultrasonic signals in the continuous ultrasonic signal array to pass through the gating switch;
• emitting, by using the transmitter, ultrasonic signals, which are allowed to pass through the gating switch, toward an object;
• receiving, by using the receiver, an echo signal reflected from the object;
• and
• measuring, by using the signal processor, a location of the object by using the echo signal.

A device comprising:

• an ultrasonic distance sensor configured to measure a location of an object;
• and
• a processor configured to perform an operation of the device by using the measured location of the object,
• wherein the ultrasonic distance sensor comprises:
• a signal generator configured to generate a continuous ultrasonic signal array that is frequency modulated;
• a gating switch configured to perform time gating to allow part of ultrasonic signals in the continuous ultrasonic signal array to pass through the gating switch;
• a transmitter configured to emit ultrasonic signals, having passed through the gating switch, toward the object;
• a receiver configured to receive an echo signal reflected from the object;
• and
• a signal processor configured to measure the location of the object by using the echo signal.