Ultrasonic detector

AN ULTRASONIC DETECTOR IS PRESENT, INCLUDING AN ULTRASONIC SOUND GENERATOR (54) AND AN ULTRASONIC SOUND RECEIVER, EACH OF WHICH CONTAINS A SUBSTRATE (58) WITH AT LEAST TWO ISOLATED AREAS (64, 66) OF A LAYER (60) OF AN ELECTRICALLY CONDUCTIVE MATERIAL LOCATED ON THE SAME. A PIEZOELECTRIC CHIP (72) IS ELECTRICALLY IN CONTACT WITH THE PRIMARY AREA (64) OF THE CONDUCTIVE LAYER (60) AND A CONDUCTOR MEMBER (74) EXTENDS BETWEEN THE CHIP (72) AND THE SECOND AREA (66) OF THE LAYER CONDUCTOR (60). AN ELECTRICAL SIGNAL THAT HAS A FREQUENCY EQUAL TO THE RESONANCE FREQUENCY OF THE CHIP (72) MAY BE APPLIED BETWEEN THE FIRST AND SECOND AREAS (64, 66) TO CAUSE AN ULTRASONIC SOUND, THEREFORE THE ULTRASONIC SOUND RECEIVED BY THE CHIP (72) IT CAN BE ELECTRICALLY DETECTED BY MEASURING THE ELECTRICAL SIGNAL PRODUCED BETWEEN THE FIRST AND SECOND AREAS (64, 66).