JPS61118012U

JPS61118012U -

Info

Publication number: JPS61118012U
Application number: JP166185U
Authority: JP
Priority date: 1985-01-10
Filing date: 1985-01-10
Publication date: 1986-07-25
Also published as: JPH044969Y2

Description

[Brief explanation of the drawing]

第１図はレーザー光源と受光板との関係を示し
た図、第２図は本考案に係る測定装置の受光板等
の構造を示した図で、イは平面図、ロは正面図、
第３図ないし第５図は本考案に係る測定装置の測
定原理および測定方法を示したもので、第３図は
マイクロメーターによる修正前、第４図は修正後
の状況を示したものであり、いずれもイはレーザ
ー光の輝度分布を示し、ロは光電変換素子の位置
を示す正面図、ハはその平面図、第５図は光電変
換素子と電圧計の配線図、第６図は本考案に係る
測定装置の別の実施例を示した図で、イは平面図
、ロは正面図、第７図は従来用いられているトン
ネル内空変位の算出方法を示した図、第８図は従
来提示されているトンネル内空変位測定方法にお
ける受光装置の概略を示した図である。１……レーザー光源、２……鏡またはプリズム
、３……レーザー光、４……各点、５……トンネ
ル、６……スポツト径、１１……受光板、受光装
置、１２……通孔、１３……光電変換素子、１９
……穴、２１……基板、２２……ブラケツト、２
３……板、２４……スライド棒、２５……ばね、
２６……マイクロメーター、２６Ａ……測定端、
２６Ｂ……ねじ部、２７……電圧計、３１……中
間板、３３……板、３４……スライド棒、３９…
…穴。 Fig. 1 is a diagram showing the relationship between the laser light source and the light receiving plate, and Fig. 2 is a diagram showing the structure of the light receiving plate, etc. of the measuring device according to the present invention, where A is a plan view, B is a front view,
Figures 3 to 5 show the measurement principle and measurement method of the measuring device according to the present invention. Figure 3 shows the situation before correction with a micrometer, and Figure 4 shows the situation after correction. In each case, A shows the brightness distribution of the laser beam, B shows the front view showing the position of the photoelectric conversion element, C shows the top view, Figure 5 shows the wiring diagram of the photoelectric conversion element and the voltmeter, and Figure 6 shows the main picture. FIG. 8 is a diagram showing another embodiment of the measuring device according to the invention, in which A is a plan view, B is a front view, FIG. 7 is a diagram showing a conventional method of calculating the displacement inside a tunnel, and FIG. 1 is a diagram schematically showing a light receiving device in a conventionally proposed method for measuring displacement inside a tunnel. 1...Laser light source, 2...Mirror or prism, 3...Laser light, 4...Each point, 5...Tunnel, 6...Spot diameter, 11...Light receiving plate, light receiving device, 12...Through hole , 13... photoelectric conversion element, 19
... Hole, 21 ... Board, 22 ... Bracket, 2
3...Plate, 24...Slide rod, 25...Spring,
26...micrometer, 26A...measuring end,
26B...Threaded part, 27...Voltmeter, 31...Intermediate plate, 33...Plate, 34...Slide rod, 39...
…hole.

Claims

[Scope of utility model registration request]

A laser light source is placed at a reference point in the tunnel and emits a laser beam in the direction of travel of the tunnel, a substrate is fixed at predetermined points at a plurality of measurement positions in the tunnel, and a spring and a micrometer are connected to the substrate. A through hole is provided in the center portion of the laser beam, and a through hole is provided in the central portion of the laser beam, and a through hole is provided outside the through hole in the one direction or the two directions that are orthogonal to each other. a light receiving plate having a photoelectric conversion element;
A tunnel space displacement measuring device consisting of a voltmeter connected to measure the difference in voltage generated by a pair of photoelectric conversion elements.