Detection of noise-induced ultrasonic sensor blindness

• Main Authors: SUCHY TOMAS, HUSTAVA MAREK
• Format: Patent
• Language: Chinese; English
• Published: 31.07.2020
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

Detection of noise-induced ultrasonic sensor blindness. Piezoelectric sensor controllers may facilitate detection and identification of various potential fault states including noise-induced sensor blindness. In one illustrative embodiment, a sensor controller includes: a transmitter to drive a piezoelectric element during actuation intervals to generate acoustic bursts; a receiver to sense a response of the piezoelectric element to echoes of each acoustic burst, the receiver including a front-end amplifier; a processing circuit coupled to the transmitter and to the receiver, the processing circuit operable to apply echo-detection processing to said response; and a blindness detector to detect saturation of the front-end amplifier during or prior to the measurement intervals. 本发明题为"噪声引起的超声波传感器盲区的检测"。压电传感器控制器可以促进对各种潜在故障状态的检测和识别，包括噪声引起的传感器的盲区。在一个示例性实施方案中，一种传感器控制器包括：发射器，该发射器在致动间隔期间驱动压电元件以产生声脉冲串；接收器，该接收器感测压电元件对每个声脉冲串的回波的响应，该接收器包括前端放大器；处理电路，该处理电路耦接到发射器和接收器，该处理电路可操作为对所述响应施加回波检测处理；以及盲区检测器，该盲区检测器在测量间隔期间或之前检测前端放大器的饱和。