Ultrasonic transducer ranging system with multiple working modes

Abstract

The invention relates to the ultrasonic transducer ranging technology, in particular to an ultrasonic transducer ranging system with multiple working modes, which comprises a transducer array module,a selector / switch module connected with the transducer array module, three working mode modules connected with the selector / switch module respectively, and a processor module, and a peripheral moduleconnected with the processor module; and the processor module is connected with the three working mode modules. According to the system, three working modes of a ToF mode, a single-frequency phase mode and a multi-frequency phase mode are combined through a selector / switch module and are integrated in one ultrasonic transducer ranging system, the disadvantages of the three different working modesare compensated by utilizing the advantages of the three different working modes, the ranging effective range is expanded, and meanwhile, the blind area limitation of the near-field minimum distance is eliminated, and the distance measuring range and precision of the ultrasonic transducer distance measuring system are improved.

Description

Technical field [0001] The invention belongs to the technical field of ultrasonic transducer distance measurement, and particularly relates to a multi-working mode ultrasonic transducer distance measurement system. Background technique [0002] Ultrasonic transducers are transducer elements that can be used to transmit and receive ultrasonic waves. When in the transmitting state, the electric energy is converted into the vibration of the transducer through electrostatic force or the inverse piezoelectric effect to radiate sound waves; when in the receiving state, the sound pressure acts on the surface of the transducer to make it vibrate, and the transducer then Convert vibrations into electrical signals. The existing ultrasonic ranging working modes are generally divided into three types: ToF (Time of Flight) mode, single-frequency phase mode and multi-frequency phase mode. ToF mode is the most commonly used ranging mode. It measures the time difference between ultrasonic tran...

AI Technical Summary

Problems solved by technology

Among them, the ToF mode is simple to operate, but the accuracy is low, and is limited by the minimum distance blind zone; the single-frequency phase mode has high accuracy, but the effective distance is short, and is limited by the maximum distance blind zone; The maximum distance is limited by the blind zone, but the effective distance range is expanded

[0003] In the traditional ultrasonic ranging system, since the resonance frequency of the ultrasonic transducer is constant, the transducer can only emit ultrasonic waves of one frequency, so the ranging system generally only adopts one of the working modes, and the range and accuracy of the ranging Tends to be poor, either limited by the blind zone at the minimum distance in the near field or the maximum distance in the far field

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