The vibrating wire crack gauge converts the opening and closing displacement of the crack into the tension change of the steel string, and then maps it into a vibration frequency signal, achieving long-term measurement of millimeter-wide cracks. Anti-interference monitoring.

It belongs to the reduction of vibrating wire tension; Conversely, when the crack closes, the tension increases.

This sensor is widely used in civil engineering for monitoring the minute opening and closing deformations of structural surfaces or joints.

Infrastructure: DAMS, Bridges, tunnels, concrete buildings, roads and factories.

Geotechnical engineering: Monitoring of tensioning joints within rocks and soil, as well as monitoring of slope deformation and foundation settlement in mountains.

Other fields: Safety monitoring of metro tunnel structures, impact assessment of earthquakes on geotechnical engineering, etc.

Key points for installation and usage

To ensure accurate measurement, installation must follow the specifications:

Installation method: It can be installed by welding or anchoring. When welding, it is necessary to ensure that the surface of the steel is flat and clean. When anchoring, expansion screws need to be implanted and tightened.

Cable layout: Instrument cables must not be laid together with AC cables and should be kept as far away as possible from electrical interference sources such as engines and transformers.

Data reading: After installation, connect the reading instrument and record the initial frequency value. If the variation of multiple test data is within 1Hz, it can be considered that the data is stable.