How To Learn ultrasonic distance transducer

The basic working principle of ultrasonic ranging transducer has mang aspects.the transmitting probe emits ultrasonic waves, which is propagating in the medium, and then distance transducer for detect object returns to the receiving probe through the medium after obstructing reflections, measuring the time required for the ultrasonic wave from transmitting to receiving, and then measuring the speed of sound in the medium. The ultrasonic sensor distance measurement is to meet obstacle can be calculated. According to the working mode of the probe used, it can be divided into spontaneous self-single probe mode and one-shot and double-receiver mode. According to experience, the single-probe of self-recovery mode is the preferred method. 

(1) The formula for calculating the distance in the single probe that is measuring distance in the air is relatively simple, and some corrections are required in the formula for the dual probe mode; (2) There are many probes, and there are many land occupations. The number of accessories such as connectors and cables ae used to increase, and the possibility of failure increases accordingly. In some special cases, it has to use the dual probe method.

There are many reasons: (1) When the 80Khz ultrasonic transducer distance for liquid level is very long, in order to increase the transmission power, special forms of high-power ultrasonic transmission transducers are required. However, the reception sensitivity of underwater ultrasonic distance sensor is generally low, and even cannot be used for receiving. Do not use another transducer as the receiving device; (2) In the case of the same probe is acting as the transmitter and receiver at the same time, the aftershock has a greater impact on the echo; (3) The double probe has a feature that the blind area is small . Therefore, when actually is selecting the ultrasonic sensor for parking sensor, it should be determined according to different applications, measurement accuracy, and measurement range.