Single ultrasonic sensor detection system

Abstract

The invention discloses a single ultrasonic sensor detection system, which includes two ultrasonic probes, a power supply, a signal generator, a digital oscilloscope and a computer. The ultrasonic probe is packaged by a circuit system and an ultrasonic sensor. To receive the ultrasonic wave and obtain the time interval between the echo signal and the trigger signal, use the ultrasonic probe 1 as a reference probe to obtain the ultrasonic standard sound velocity in the current test environment, and use the ultrasonic probe 2 as the test probe to test the distance to be measured ;Use the computer to analyze the data to obtain the test distance. The invention utilizes the circuit system to realize the precise control of the emission and reception of ultrasonic waves by the single ultrasonic sensor, and accurately measures the transmission time of ultrasonic waves; uses the reference method to analyze the waveform data, reduces the measurement error caused by environmental factors, and has high sensitivity and accurate measurement. advantage.

Description

technical field [0001] The invention belongs to the field of sensors, and in particular relates to a single ultrasonic sensor detection system. Background technique [0002] Ultrasonic technology has many advantages such as low cost, fast speed, non-contact, non-destructive and so on. Therefore, ultrasonic testing technology is widely used in many indirect testing fields, such as engineering measurement, robotics, industrial automation, etc. However, the transmission and reflection of ultrasonic waves in multi-layer media is very complicated, and quantitative detection is difficult. At the same time, when ultrasonic waves are transmitted at different frequencies in the same medium, the energy attenuation characteristics of ultrasonic waves are also quite different. Generally, with the increase of ultrasonic transducer frequency, transmission distance, reflective surface absorptivity and radiation angle, the energy attenuation of ultrasonic waves increases rapidly. [0003...

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Problems solved by technology

[0005] Reference document: An ultrasonic ranging system and a method for controlling its ranging (201410124601.3), using two ultrasonic transducers as transmitters and receivers, which are composite probes, so the frequency of the two probes of the detection system is consistent Difficult to guarantee, thereby increasing the measurement error; and if the echo receiving port described in the patent does not receive the echo signal for a period of time, it is necessary to re-transmit the ultrasonic wave, which makes the real-time performance of the test system low

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