1.The introduction of instrument

QY-II Inclinometer is a high-quality sensor with independent intellectual property rights jointly developed by the Institute of Engineering Mechanics, China Earthquake Administration,and Hebei Zhenchuang Electronic Technology Co., Ltd. The instrument has the characteristics of high precision, easy to use, fast, low requirements on environmental conditions and strong anti-interference ability. This sensor can be used in conjunction with the G01NET series collector produced by our company, and can also be used in conjunction with other collectors that collect voltage signals.

This series of inclinometer is mainly used to measure the inclination value of the bridge under static load , and through , the deflection value Y of the bridge can be obtained.

Static deflection measurement: load measurement

Before loading, measure the output voltage V01 of the inclinometer; after the bridge is loaded, measure the output voltage V02 of the inclinometer, and measure the output voltage V03 of the inclinometer again after unloading. When V01≈V03, the inclination angle generated after the bridge is loaded is:

q= V02   - V01 (Angular minutes)

Sq

When calculating the deflection by the inclinometer, the angle minutes should be converted to diameter. 1 arc minute = 2.909×10-4 diameter. After the inclination angle of each point of the bridge is measured, the deflection of the bridge can be calculated through the software

Dynamic deflection measurement:

When the dynamic load (heavy vehicle, etc.) passes through the bridge, the output voltage of each measuring point inclinometer is collected and stored by the data acquisition system, and then the dynamic deflection measurement software can be used to obtain the dynamic deflection.

Figure 1 QY-II type inclinometer

Figure 2 Schematic diagram of QY-II inclinometer

2.The main technology parameter

The technical parameters of QY-II inclinometer are shown in the table below：

Table 1 Technical parameters of QY-II inclinometer

3.The range of application

Mainly used to measure the relative inclination of structures, the static and dynamic deflection of bridges and buildings.

4.Product features

1)Using capacitive sensing and passive servo technology

2)High resolution

3)High sensitivity