Key Technology Research On Driving Circuit Of Transducer For Water Depth Monitoring In Channel

With the shipping industry's rapid development, port access to passenger and freight volume is on a rapid growth, and the security requirements of channel port is increasing, how to ensure an adequate shipping channel depth becomes to be a key problem. The traditional measurement method is implemented with sonar, ruler, and other measuring devices in various locations, which are placed on a large volume of the ship. This scheme has been widely used, but when measured in its flight path, it takes resources, impact of transport, and do not have real-time, so the measurement data will not see a high value after a period of time. In order to solve this problem, we propose a new measurement method.This subject stems from a water deep monitoring project, which requires a system to monitor channel water depth real-timely, and the measured depth data would be transmitted to the monitoring center to deal. System is mainly composed of three parts, namely the transmitting and receiving sonar unit, the data processing unit and the monitoring centre. And this subject is the first part, that is, the design of the transducer driving circuit.In transducer transmitting circuit, through the analysis of transducer and the principle of functional. Driving circuit was designed which controlled by a microcontroller, and the width of the ultrasonic pulse is adjustable. According to the function of the system needs, it include power supplying circuit, power monitoring, GPS synchronization units, the MCU control circuit, power control circuit, signal generation circuit and matching circuit parts. Voltage adjustment circuit in the pulse control circuit gives up the traditional forms of power modules, the use of capacitive charge makes this part of the circuit to extend the service life.In the receiving end, the signal passes through amplifier, filter, and AGC goes to the next part. The use of integrated filtering chip simplifies the designing of the circuit and reduces the inherent error of the device, and the automatic gain control circuit provides the appropriate signal range. After these processing, signal sends to the data-processing module for data analysis.