Tilt Sensors for Monitoring Hydropower Stations and DAMS

 Tilt sensors can be used for hydropower station and dam monitoring.

The safety of hydropower DAMS not only directly affects the power plant's own benefits, but also closely related to the lives and property of downstream people, national economic development and ecological environment. With the development of electronic technology and the popularization and application of digital communication technology, it provides the guarantee for monitoring automation. At present, the dam monitoring automation of the national power system has been fully carried out, and it is developing in the direction of network and intelligence.

(1) Deformation monitoring

Dam deformation is an important monitoring project for hydropower DAMS. It can also be divided into horizontal displacement and vertical displacement 2 subterms. Most DAMS are equipped with horizontal and vertical displacement observation, usually one pair of measurement points per dam section. In recent years, more attention has been paid to the horizontal displacement observation of typical dam section. Generally, more than 3 measuring points are arranged along the dam height.

Dam deformation monitoring equipment can choose tension line, GPS, fixed inclinometer, ER-TS-3160VO tilt sensor, static level, etc.

(2) Seepage

Dam seepage is also one of the important monitoring projects of hydropower DAMS. It can also be divided into two sub-terms: osmotic pressure and osmotic flow. The observation facilities of concrete dam are located in the foundation corridor, and the lifting pressure is measured at one point for each dam section. The seepage flow measurement point is determined according to the water collection situation of the drainage ditch, and can generally measure the regional flow and the total amount. The seepage rate of earth-rock dam is observed at the seepage point at the toe of dam, and the seepage pressure measurement point is arranged under the dam body infiltration line or behind the toe plate according to the specific dam type. In addition, the slopes of the left and right banks of the dam have been set up to observe the water table in order to monitor the seepage around the dam. Seepage monitoring of dam mainly adopts osmometer as testing equipment.

(3) Vipassana items such as stress and strain

Dam stress and strain and other internal observation items are general observation items of hydropower DAMS. Only some critical observation points are included in automatic monitoring, and many middle and low DAMS have stopped measuring or sealed up such observation items. In the dam construction stage, the stress and strain internal observation items are widely used, and the commonly used monitoring equipment include embedded strain gauge and steel bar gauge.

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