Development Of Dam Osmotic Pressure Automatic Monitoring System Based On Vibrating String Sensor

Osmotic pressure monitoring is one of the items in dam safety monitoring. The automatic monitoring system of dam safety has been developed quickly since 1970. But for the adverse operation circumstances, high reliability requirements of osmotic pressure automatic monitoring system, it still has some problems in the automatic monitoring system of dam safety. Therefore, a new dam osmotic pressure automatic monitoring system based on vibrating string sensor is developed.The work principle and character of vibrating string sensor are elaborated in this paper. The design thought and realization method of hardware, software structure and data communication for dam osmotic pressure automatic monitoring system is put forward. Intelligent dam osmotic pressure automatic monitoring system with single chip as core is developed. The system sample has been tested and operated for trial in the lab. The system has following characters: 1 Frequency and temperature signal is collected and treated in same channel, and the real 16-channel has been realized. .2 Collection unit has LCD function that can display collected signal for the convenience of maintenance and inspection. 3 The accuracy grade of frequency collection is improved, the function modular to prevent lightning and electromagnetic disturbance of signal and power source is added. It has the characters of small size, low cost and good adapting for adverse circumstance. Test and trial operation results show that the hardware and software of this system has strong versatility and stability, and performance index conforms to design requirements.