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Adaptive scanning subgrade settlement remote monitoring device and method

A remote monitoring and self-adaptive technology, applied in measuring devices, surveying and navigation, measuring instruments, etc., can solve the problems of small dynamic range of photoelectric devices, difficulty in eliminating stray light, and low measurement efficiency, so as to avoid external background stray light interference, easy establishment of a unified measurement reference, and reduced equipment cost

Inactive Publication Date: 2011-08-31
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above existing technologies generally have the following three main disadvantages: first, relying on manual measurement or recording, the measurement efficiency is low, and the detection accuracy is low; second, when selecting the reference point, stability and low cost cannot be achieved at the same time; third, the measurement cannot be remotely monitored. , nor can automatic measurement
[0006] The intensity of the light source cannot be adjusted, and the dynamic range of the photoelectric device is small, so it is difficult to eliminate stray light, which restricts the scope of application of the device

Method used

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  • Adaptive scanning subgrade settlement remote monitoring device and method
  • Adaptive scanning subgrade settlement remote monitoring device and method
  • Adaptive scanning subgrade settlement remote monitoring device and method

Examples

Experimental program
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Embodiment 1

[0045] Such as figure 1 As shown, an adaptive scanning subgrade settlement remote monitoring device includes: light source, position measurement unit, settlement detection pile and fixed observation pile.

[0046] The subgrade settlement measurement unit includes: a light source 1, a position measurement unit 2, an electric rotary table 3, a settlement detection pile and a fixed observation pile 5.

[0047] The light source 1 is installed on the settlement detection pile, and the settlement detection pile is buried at the point to be measured; there are two or more points to be measured, and a settlement detection pile is buried at each point to be measured, and a light source is installed on each settlement detection pile 1. The electric rotary table 3 is installed on the fixed observation pile 5, and the fixed observation pile 5 is installed outside the settlement deformation area of ​​the subgrade, where no settlement occurs; the position measurement unit 2 is installed on ...

Embodiment 2

[0065] The difference between the composition of the self-adaptive scanning subgrade settlement remote monitoring device of this embodiment and the first embodiment is that the light source unit 102 of this embodiment is composed of a super bright monochromatic light emitting diode 121 and a fixed plate 105, as shown in Figure 3 As shown in (b), there are two holes with a diameter of 1mm on the fixed plate; the ultra-bright monochrome light-emitting diode and the two holes form an isosceles triangle with a base of 20mm and a height of 40mm.

[0066] The method for automatically measuring the longitudinal displacement of the rail in this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0068] The difference between the composition of the self-adaptive scanning subgrade settlement remote monitoring device of this embodiment and the first embodiment is that the light source unit 102 of this embodiment includes a first semiconductor laser 131 with a pigtail, an optical fiber beam splitter 133, a fixed plate 105, as shown in Figure 3 (c); the control end of the semiconductor laser 131 of the first band pigtail is connected with the control unit 102, the output pigtail 132 of the semiconductor laser 131 of the first band pigtail and the fiber beam splitter 133 The input end is connected, and the two output ends of the optical fiber beam splitter 133 are respectively connected with one end of the first output optical fiber 134 and the second output optical fiber 135, and the other ends of the first output optical fiber 134 and the second output optical fiber 135 are respectively fixed on the fixing plate In two holes 20mm apart on 105.

[0069] The method for auto...

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Abstract

The invention relates to an adaptive scanning subgrade settlement remote monitoring device and an adaptive scanning subgrade settlement remote monitoring method, which belong to the field of optical and geometrical position measurement. The device comprises a settlement monitoring pile, light sources (1), a fixed observation pile (5), a position measurement unit (2) and an electric rotating stage(3). In the method, a plurality of light sources comprising a first point light source (103) and a second point light source (104) are adopted; and the method comprises the following steps: imaging the first and second point light sources at the position measurement unit; calculating imaging magnification according to a distance between image points; calculating subgrade settlement according to the imaging magnification and the displacement of the image points; and measuring the subgrade settlement of a plurality of points to be measured in a way that the electric rotating stage 3 drives the light source position measurement unit to rotate and be orderly aligned with the light sources. The device and the method accurately measure the imaging magnification, improve measurement accuracy, can perform measurement for 24 hours per day because the light intensity of the light sources is adjustable, and reduce equipment cost because one detector can measure a plurality of targets and a uniform reference is established.

Description

technical field [0001] The invention belongs to the technical field of optical measurement and geometric position measurement, and relates to an adaptive scanning roadbed settlement remote monitoring device and method. Background technique [0002] Subgrade settlement measurement plays an important role in track safety detection and monitoring. At present, the observation devices used to measure road subgrade settlement mainly include water cup settlement instruments, settlement plate measuring devices, profile settlement instruments, PVC pipe settlement instruments, and magnetic ring settlement instruments. The above existing technologies generally have the following three main disadvantages: first, relying on manual measurement or recording, the measurement efficiency is low, and the detection accuracy is low; second, when selecting the reference point, stability and low cost cannot be achieved at the same time; third, the measurement cannot be remotely monitored. , and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C15/00
Inventor 冯其波杨婧张斌
Owner BEIJING JIAOTONG UNIV