Design of a dam osmotic pressure monitoring system based on vibrating string sensor is presented for the harsh operation circumstance

high reliability requirements of osmotic pressure automatic monitoring system.The hardware part of this system use LPC2368FBD as main controller

which integrates functions such as data collection

data storage

data display and power management.The working principle and characteristic of vibrating string sensor are elaborated.The structure and design thought of hardware and software for dam osmotic pressure automatic monitoring system is introduced.The design principles and implementation process of data acquisition circuit is analyzed in detail.The system sample machine is test and operated for trial in the lab.The system has following characters:the frequency’s measurement precision is ±1 %.The function to prevent lightening and electromagnetic disturbance of signal and power source is strong.It has LCD function that can display the collected datas.It has the characteristics of small size

low cost and adapts for field harsh circumstance very well.