Dam settlement and bridge building health monitoring

   The FBG tunnel crustal settlement monitoring system for dam settlement and bridge building health monitoring connects the FBG static level and FBG slit meter with the FBG sensor analyzer through armored optical cable. The FBG sensor analyzer receives the optical signal with measurement information sent by the optical fiber sensor and demodulates it to the measurement value to realize the settlement The on-line measurement of fracture condition forms the historical measurement curve. When the settlement, fracture is too high or the rising trend is abnormal, the alarm will be given, and the settlement, fracture value and historical alarm value of each monitoring point will be saved, so as to provide scientific and accurate data support for the change of crustal settlement.

Advantages of the system:

1、All optical type, no power supply on site;

2、Not affected by electromagnetic interference and nuclear radiation;

3、Not affected by electromagnetic interference and nuclear radiation;

4、Not affected by electromagnetic interference and nuclear radiation;

5、It can be used in the environment of high temperature, high humidity and chemical erosion for a long time;

6、 Absolute measurement, no zero drift, light source attenuation and line loss do not affect the measurement accuracy, no need for field calibration;

7、The safety level of the monitored equipment shall not be reduced, and the sensor and transmission optical fiber shall be insulated, high voltage resistant, anti creepage and flame retardant;

8、Long distance transmission, the distance can be several kilometers to dozens of kilometers, easy to network;

9、Fast installation and easy maintenance.

Technical features:

1、High precision 

2、High reliability 

3、Fast measurement speed  

4、1-64 channel capacity can be expanded smoothly 

5、Compatible with similar FBG sensors of domestic and foreign manufacturers

Performance index:

Number of channels                              1/4/6/8/16/32/64channels (customized according to customer requirements)

Capacity temperature of each channel: 1-40; strain: 1-18; displacement: 1-12; pressure: 1-12

Wavelength spacing                               0.4nm minimum

sampling frequency                           Synchronous measurement speed is 1-100hz

Outline size                           430mm×350mm×88mm    

Temperature                           Resolution: 0.1 ℃; measurement accuracy: ± 0.5 ℃

Strain                           Resolution: ＜ 0.1% F.S.; measurement accuracy: ＜ 0.3% F.S

Displacement                           Resolution: ＜ 0.1% F.S.; measurement accuracy ＜ 0.3% F.S

working voltage                                 220V±10%，50Hz

Maximum power consumption                             Typical value: 30W; maximum value: 40W

data interface                              Support 100M Ethernet port and RS485

Output working environment / working humidity                 -No condensation at 10~55 ℃ /0~80%RH

Storage environment / storage humidity                     -No condensation at 20-80 ℃ / 0-95% RH

Wavelength range                                    1525~1565nm