Can You Really Find ultrasonic distance transducer (on the Web)

              Can You Really Find ultrasonic distance transducer (on the Web)

Different thicknesses of glass combines the thickness of the ultrasonic distance transducer for parameter adjustment and measurement accuracy testing. Using digital display vernier caliper (resolution 0.01mm) to measure each glass 10 times, it is removing maximum 1mm  to take the average value as the thickness of the glass, as the parameters are debugging .it is the inspection of glass thickness measurement. accuracy test of 75khz ultrasonic range finder is different glass combinations.

Principle method and evaluation of utrasonic water depth is depth measurement.output a voltage value of ultrasonic sensor is collected and stored by the data collector according to the measurement distance, it is the distance from the sensor surface can be calculated. In this paper, ultrasonic distance sensor is used to measure the distance between the front and back of the glass. The difference is the glass thickness value. Similarly, the distance between the front and the back of the water tank is measured. The difference between the two is the water depth measurement value.

The main parameters are affecting the measurement sensor which is measurement time of long range ultrasonic distance transducer, sampling interval, range, and data filtering. The data filtering is the process of input suppression (the closest value is filtering or stability filtering) on the raw sensor measurement values , and then it is averaging (sliding average or box average). The sampling interval determines the sampling rate and is limited by the range. The value ranges from 5ms to 2.78h. The closest value is filtered to retain the closest value among the M measurement values, which affects the output response time. The M value of 2MHz ultrasonic sensor is 2 to 999. Stability is filtered as at least X of the first Y measurements are within ±6.25% of the current measurement.

Ultrasonic sensors are used to continuously lay the bottoms of six different thickness glass combinations under each parameter setting.Measuring 2 min is selecting coefficient of variation as a measure of the stability of the sensor measurement to reflect the degree of variation of the observed values, the smaller is the CV value, the more stable is the measured value. Where the CV of ultrasonic fuel tank sensor is the coefficient of variation; SD is the standard deviation; MN is the average value.