Views:4 Author:Site Editor Publish Time: 2017-11-03 Origin:Site
The Latest Trend In Ultrasonic Transducers
Ultrasonic distance sensor transducer sends output electrical signal immediately receiving the mechanical echo signal, amplitude of the electrical signal changes by the time. Then electrical signal is the threshold of triggering time ,so the triggering time of electrical circuit is late about 2 cycles than received signal, an error of the acoustic wavelength will be generated within the single-way test distance, that is, ΔL = cT (5), T is the cycle of ultrasonic, Therefore, ultrasonic transducers frequency is the greater,the cycle is the smaller, test accuracy of the sensor is the high. However,when is in the selection of ultrasonic echo sounder depth transducer, which should also consider the ultrasonic transducer for heat flowmeter, the frequency is the greater, the damping factors are bigger in the propagation process,which will affect its effective test distance.
Each ultrasonic probe separately tests the distance between the probe and the road surface ,and uploads the control box which processes the data according to a predetermined algorithm to obtain the average distance between each ultrasonic probe and the road surface. By comparing the deviation between the real-time average distance and the set reference distance, a correction signal is generated to control the rising, falling or holding state of the leveling cylinder, so that the deviation between the real-time average distance and the set reference distance is within the set dead zone.