In view of the application of ultrasonic sensor in the agricultural environment

the variability of environment will cause the transmission error

the sensor beam angle effect will lead to measurement error

in addition

a lot of mechanical vibrations will cause measurement error.A ranging test platform is designed.According to the working principle of ultrasonic sensors

the reason which causes measurement error is studied.The measurement errors caused by the measured surface and the sensor beam angle is focused on

the size of the error under different conditions is compared and the compensation error of the method is discussed.It provides a theoretical basis for improving the measurement precision of the detection system based on ultrasonic sensor.