传统地表裂缝监测一般直接测量裂缝两侧的综合位移,无法得出各方向裂缝位移值,为此,提出一种数字式远程地表裂缝的三维测量方法及系统.现场采用电阻型拉杆式位移传感器与两个角度传感器获得地表裂缝的综合位移、下挫角度、侧移角度,微处理器基于三角函数分解计算得出地表裂缝的三维位移值,通过GSM/GPRS方式发送给目标服务器.该方法克服传统地表裂缝位移测量只能得出综合分量的缺陷,实现裂缝位移精细化三维测量,可测量位移最大行程1 m、分辨率0.1 mm,采用5～24 V直流电压供电,便于对滑坡、地裂缝等灾害的裂缝发育情况进行定性定量分析.%The traditional surface crack monitoring technique usually measures the integrated displacement directly on both sides of cracks, which is unable to get the crack displacement value in all directions. Therefore, a digital remote surface crack 3D measurement method and system was proposed. Resistance type rod displacement sensor and two angle sensors were adopted at site and to obtain the comprehensive displacement, drop angle and later angle of surface cracks, and the microprocessor calculated the 3D displacement of the surface crack according to the trigonometric function, which was sent to the target server by means of GSM/GPRS. This method has overcome the defect of traditional surface crack monitoring technique that can only acquire the integrated component and achieved the goal of accurate 3D measuring of crack displacement. With the 5 V to 24 V DC power supply, the equipment can measure the maximum displacement of 1 m with the resolution of 0.1 mm, which is convenient to quantitatively and qualitatively analyze the development of cracks for landslides and ground fissures.
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