Ultrasonic tightness test system for motor vehicle using ultrasound generator

摘要

The system includes an ultrasonic transmitter (100), a first current supply and a charging condition detector (130), which indicates a full charge of an auxiliary current supply, charged up by the first current supply (110). A ultrasonic oscillator (160) is excited to oscillation by the supplied power. The generator generates waves with the signal supplied by the oscillator. A receiver system (300) with a receiver (310) receives signals transmitted by the transmitter system. A signal detector (340) detects the signals using the receiver system, and produces a Zener voltage. A control unit (385) controls signals detected by the detector. An intermediate storage briefly stores the passing signals of the control unit. An A-D converter converts analogue data of the Zener voltage to digital data. A second current supply (450) takes power from a cigarette lighting socket. A keyboard input unit (400) determines the operating mode of the control unit. A sound generator (380) depending on the signal of the control unit, produces sound signals. A liquid crystal indicator (480) indicates the determined ultrasonic signals.