Seepage flow and seepage pressure monitoring device

Abstract

The invention provides a seepage flow and seepage pressure monitoring device, which belongs to the technical field of the safety monitoring of the reservoir dam. The invention is characterized in that the upper end of a water level sensor is connected with a control box to form the reservoir dam seepage flow and seepage pressure monitoring device; the water level sensor consists of a twin-core cable which is externally coated with a waterproof dermic layer; the cross section of the twin-core cable is of a infinity shape; the control box consists of a signal acquisition unit, a microprocessor, a wireless communication module, a battery pack and a voltage conversion unit; the signal acquisition unit can convert water level information and environment temperature information into digital information; the microprocessor can correct and calculate the digital information; the wireless communication module can send out water level calculation information; and the voltage conversion unit can carry out boosting conversion on the voltage of the battery pack and carry out real-time monitoring on the electric quantity of the battery pack. During monitoring, the device is arranged in a piezometer tube inserted into the dam body of the reservoir dam to carry out monitoring.

Description

technical field [0001] The invention belongs to the technical field of reservoir dam safety monitoring, and in particular relates to a seepage and seepage pressure monitoring device of a reservoir dam. Background technique [0002] Safety monitoring of reservoir dams is a very important task. The seepage and seepage pressure of dams is one of the important indicators to measure the safety degree of reservoir engineering operation, which is generally realized by monitoring the water level. [0003] At present, there are many methods for monitoring the water level of reservoir dams at home and abroad, among which there is a floating ball measurement method, which has frequently moving mechanical parts, which is not conducive to accurate measurement of the water level, and has poor long-term stability; the patent No. ZL94203512.7 is disclosed A piezometric tube water level detector, mainly composed of mechanical components such as stepping motors, has low measurement accuracy a...

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Problems solved by technology

[0003] At present, there are many methods for monitoring the water level of reservoir dams at home and abroad, among which there is a floating ball measurement method, which has frequently moving mechanical parts, which is not conducive to accurate measurement of water level , poor long-term stability; the patent No. ZL94203512.7 discloses a piezometric tube water level detector, which is mainly composed of mechanical components such as stepping motors, and has low measurement accuracy and reliability; In the method of pressure measurement and water level measurement, the sensor containing the electronic device must be soaked in water for a long time, it is easy to enter water, condensation or damp, once the water enters, the sensor will completely fail; the patent No. ZL200710067265. A method of measuring water level using a distributed optical fiber temperature sensor. This method is costly. An ordinary reservoir dam needs dozens or even hundreds of piezometric tubes, which is difficult to popularize and use; using a coaxial capacitive sensor to measure water level The method is only applicable to the measurement of the water level in the water storage equipment, not applicable to the measurement of the water level of the reservoir dam; the patent No. ZL200920051119.6 discloses a wireless seepage pressure monitoring system of the reservoir dam, although the system is used Dam monitoring, but it has complex structure and high cost

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