FTDM-4F Laser Tunnel Profiler
、仪器概述 I. Instrument Overview
75% 的国土是山地或重丘，为缩短里程，保护环境，节约土地，在我国的山地基础设施建设中尤其重视隧道方案。 China is a mountainous country, and 75% of its land is mountainous or heavy hills. In order to reduce mileage, protect the environment, and save land, special attention is paid to the tunnel scheme in the construction of mountain infrastructure in China. Excavation is a key process in the construction period and cost of the tunnel. Over-excavation not only increases the cost of the project due to the increase in the amount of slag and lining, but also directly affects the stability of the surrounding rock due to the problem of stress concentration caused by local over-excavation. Under-excavation directly affects the thickness of the lining and creates hidden dangers to project quality and safety. Various data show that over-excavation control has an important impact on the reliability and economic benefits of the tunnel structure.
The laser tunnel section detector uses non-cooperative target laser ranging technology and precise angle measurement technology. It combines polar coordinate measurement methods with computer technology and cooperates with professional graphics processing software to quickly obtain the internal contour curve of the enclosed space of the tunnel and display over-underage in real time. The digging value can measure the convergence and excavation earth and stone volume at the same time. It has the function of indicating blastholes. It can quickly issue test results and reports without post processing. It is a very practical engineering measurement tool.
1.Fast detection of tunnel excavation section
2.Internal contour detection of long-span buildings
3. Acceptance inspection of slope protection retaining wall
4. Monitoring of excavation section of dam bottom and ditch
5. Static bridge deflection detection
6. Mine boundary detection
7. Construction inspection, completion acceptance inspection and excavation volume inspection
Third, the instrument features
1. True high-speed and accurate detection, no post-processing required, can directly output reports
2. High-precision angle control to ensure accurate measurement results
3. Real mass storage for unlimited use
4. Integrated design, compact and lightweight, simple and convenient operation
5. Use a dedicated controller to display the results visually
、技术指标 Fourth , technical indicators
1. Instrument functions: current, front and rear section detection, blasthole indication, earthwork calculation, surrounding rock convergence detection
2. Distance before measurement: 2-5R (optimal distance)
3. Display mode: Real-time display of over-undercut
4. Control method: dedicated controller or UMPC
5. Detection radius: 0.05-80 meters
6. Ranging accuracy: 1 mm
7. Angle measurement accuracy: 6 (2) seconds
8. Angle measurement range: 30 ～ 330 degrees
9. Detection speed: 90 seconds / section (51 points)
10. Storage capacity: 10 million sections
Technical Parameters of Tunnel Profiler
°（360秒）；测量精度：±1mm；检测半径：0.3M～60M。 The main parameters of cross-section instruments of other manufacturers on the market: the corner accuracy is mostly ± 0.1 ° (360 seconds); the measurement accuracy is ± 1mm; the detection radius is 0.3M ～ 60M.
米时，测量点的位置误差= ± 10米xsin0.1= ± 17.5mm，当仪器与隧道壁距离60米时，测量点的位置误差= ± 60米xsin0.1= ± 104.7mm，由于隧道壁是凸凹不平的，且表面通常是圆弧型，当测量点的位置误差为±104.7mm ，也就是位置误差209.4mm。 When the distance between the instrument and the tunnel wall is 10 meters, the position error of the measurement point = ± 10 meters xsin0.1 = ± 17.5mm; when the distance between the instrument and the tunnel wall is 60 meters, the position error of the measurement points = ± 60 meters xsin0.1 = ± 104.7mm, because the tunnel wall is uneven, and the surface is usually circular, when the position error of the measurement point is ± 104.7mm , that is, the position error is 209.4mm . Such a position error, distance measurement accuracy ± 1mm is meaningless, and the surrounding rock convergence is also meaningless. ° 肯定是不能满足测量要求的。 Therefore, the instrument's rotation angle control error: ± 0.1 ° must not meet the measurement requirements.
秒、6秒和9秒的。 The angle measurement accuracy of our laser tunnel section detector is usually 2 seconds, 6 seconds and 9 seconds. At 10 meters, the position error is 0.096mm at 2 seconds, the position error is 0.29mm at 6 seconds, and the position error is 0.44mm at 9 seconds. In this way, the angular accuracy and distance accuracy are matched, and the accuracy of the total station is equivalent, which can meet the measurement Claim.