working principle：

The tested structure undergoes deformation under stress, which drives the strain gauge to deform and changes the tension of the internal steel string, thereby altering its vibration frequency. By exciting and measuring the vibration frequency of the steel string through an electromagnetic induction coil, the micro strain of the strain gauge is obtained by calculating the frequency change .

structural composition：

Composed of strain gauges, installation fixtures, signal transmission cables, and some also equipped with temperature sensors .

feature：

● High sensitivity and high precision: able to accurately capture small strain changes inside the structure.

● Good linearity and stability: Accurate and reliable measurement results .

● Sensitive to concentrated loads: able to quickly provide feedback on structural status .

● Strong adaptability: Made of all stainless steel structure, it has good durability and can work in harsh environments such as underwater, high temperature, high humidity, etc .

● Support multifunctional measurement: temperature detection function can be added to synchronously monitor strain and temperature, and supporting accessories can also be installed to achieve multi-dimensional monitoring .

● Easy to install and maintain: compact design, easy to operate, diverse installation methods, can be welded, bolted or glued, and usually does not require frequent calibration .

● Capable of remote monitoring: can be paired with sensor collectors to achieve remote data transmission and real-time monitoring .

Application scenarios：

Widely used in fields such as bridges, tunnels, rail transit, water conservancy engineering, and buildings, such as monitoring the strain of bridges under vehicle loads, the stability of tunnel surrounding rock, and the deformation of dam bodies .

Installation method：

● Long term observation installation: First, install the paired fixtures and test bars. The bottom surfaces of the two fixtures are on the same plane and the center hole distance is the instrument gauge distance. Drill holes at the marked points of the measured structure, fix the fixture group containing the test bars with expansion bolts, and then insert the surface strain gauge from one end of the fixture so that its end face is flush with the outer edge of the fixture .

● Temporary measurement installation: Level and roughen the installation site of the measured structure, and apply paint in the middle of the bottom of the fixtureABGlue, apply along all sides502Apply quick drying adhesive to the tested area, press firmly until the adhesive is firm, and then install the strain gauge.

Recommended products and models:

BLT-900Vibrating wire surface strain gauge

BLT-10FType vibrating wire surface strain gauge

BLT-05Spot welding strain gauge