CN87101789A - Portable laser measuring instrument for tunneling cross-section - Google Patents
Portable laser measuring instrument for tunneling cross-section Download PDFInfo
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- CN87101789A CN87101789A CN87101789.XA CN87101789A CN87101789A CN 87101789 A CN87101789 A CN 87101789A CN 87101789 A CN87101789 A CN 87101789A CN 87101789 A CN87101789 A CN 87101789A
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Abstract
A kind of with laser measurement buildings or cave profile section, the particularly instrument of railway tunnel section.It has adopted tuning fork slit oscillator, adopted three grades of optical disc step-by-step countings and reset circuit in kinematic train in angle-measuring equipment, simplified device, makes the volume and weight of instrument reach portable requirement.Reduced the complete machine expense, easy and simple to handle, measuring accuracy reached ± and 2.5%.Measuring the pole coordinate parameter that to obtain section simultaneously through MICROCOMPUTER PROCESSING immediately, maximum clear height and clear span, numerical value such as section net area.
Description
The present invention relates to a kind of with laser measurement buildings or cave profile section, the particularly instrument of railway tunnel section.
To the tunnel in the construction carry out timely, quick and accurate section to detect be quality control in the current constructing tunnel, reduce cost, the important step of pick up speed.Particularly the shotcrete lining section has become the key issue of using this new technology to its shape and the control survey of thickness.Various countries have developed dissimilar portable tunnel cross-section measurement instrument in succession for this reason, as the clear 52-7267 of the Japanese Patent Application Laid-Open photogrammeter of convex annular lens-ring to light source, need just can obtain the section parameter through series of processes such as photography, flushing, error correction, interpretation drawing and calculating, the rig-site utilization operation is numerous and diverse; France S, B, S tunnel contour measuring instrument and JIS JRS 78358-2C-12 ARI projection modified form tunnel cross-section measurement instrument, adopt He-Ne laser instrument and incandescence to make light source respectively, metrology operation need be through artificial pointwise focusing, read-record, calculate and draw, just can obtain desired parameters, use complexity, measuring speed is slow; The AMT tunnel cross-section automatic measuring instrument of Switzerland An Beige (Amberg) measuring technique company development has adopted triangle intersection principle to measure section, and And is equipped with desk-top computer control system survey amount And and carries out data processing, has realized the section survey robotization.Measuring principle according to triangulation, when angle surpassed certain value, the subtle change of angle measurement was responsive to the tangent value reaction of angle measurement, for this reason, the baseline design length of above-mentioned measurement mechanical reaches 1.5m, make main frame bulky, complete machine weight surpasses 100 kilograms, and desk-top computer must enter the operation area with main frame, complicated operation, and humidity, temperature, the dust atmosphere of measurement zone all had certain requirement, hundreds of watts of complete machine power consumptions must Alternating Current Power Supply.
The purpose of this invention is to provide a kind of light, quick, high-precision cross-section measurement instrument.At the problem that above-mentioned instruments exists, fixing less base length is taked three grades of angle measurement servo tracking head and angle measurements to reset and is improved the precision of angle measurement and receiving trap with the device of door.
Invention is achieved in that a kind of generating laser 2 that comprises, the laser pick-off angle measurement, laser scanning controller 6, system controlled by computer and data handling system 31, complete machine level and steering gear, the laser measuring instrument for tunneling cross-section of systems such as power supply, laser beam projects to the target hot spot C process that is measured on the object and receives camera lens 3, focus on the back and on tuning fork oscillator 57, produce laser image point 80, tuning fork oscillator 57 and slit sheet 79 produce continuous oscillation Z waveform under the effect of slit oscillator circuit 59 and oscillator coil 56, constantly laser image point 80 is hindered and cut, make photomultiplier 58 output alternating signal J, Z and J waveform are delivered to phase-sensitive detector (PSD) 74 and are compared after prime amplifier 60 amplifies, output direct current tracking level is through direct current amplifier 73, servo power amplifier 72 rear drive servomotors 42; It drives angle measurement reversible counting optical disc 37 and constitutes one-level photelectric receiver 61, the angle measurement driven wheel 44 that is installed on the servomotor 42 is paid 46 connection angle measurement final stage gears 45 by the angle measurement speed change intermediate gear, constitute the secondary photelectric receiver, the final stage worm sector is paid 19,20 and is constituted three grades of photelectric receivers 63, formation is installed on the kinematic train, can improve the three grades of optical disc step-by-step countings and the resetting means of precision.
Being provided with two row's phase differential on the angle measurement reversible counting optical disc 37 in pulse-counting system is 90 ° photoelectricity hole a
2, a
3With reset hole a
1, one-level photelectric receiver 61 sends A
1, A
2, A
3Pulse, A wherein
2, A
3Pulse enters microcomputer 31 countings by angle measurement pulse orientation identification circuit 68.A certain ad-hoc location in complete machine angle measurement scope is provided with the multiple positional number mechanism of three grades of photoelectricity, photoelectricity receives camera lens 3 each period run and just sends one to microcomputer 31 to this position and put rapid pulse accurately and dash, and the angle measurement pulse is just counted in the basic enterprising horizontal pulse that this puts several angles.Finely tune with the sixteen bit scale-of-two that is provided with on the microcomputer 31 load switch 90 that resets, maintenance is also checked and is reset to ad-hoc location.
Three grades of driving-chains of transmission adopted, wherein the angle measurement speed change intermediate gear pays 46, and angle measurement final stage gear 45 is an involute cylindrical gear, final stage is a precision sector worm gear pairs 19,20, adopt the Pyatyi worm gear, on worm gear 20, establish one group of return difference tension spring 22 that disappears, control driving-chain final stage swing angle error delta
0;
Three grades of photoelectricity reset circuits that are installed in the pulsed reset device on the kinematic train comprise that one-level photelectric receiver 61 receives, by the reset hole a on the reversible counting optical disc 37
1The reset pulse A of output
1By the reset pulse B of the b unthreaded hole in the secondary photelectric receiver 62 output, the reset pulse C by the output of the blocking unthreaded hole c in three grades of photelectric receivers 63 resets and door 67 places converge at three grades, exports a specific reset pulse, enter microcomputer 31, directly control reseting precision by reseting pulse width;
Laser transmitting system adopts miniwatt He-Ne laser tube, directly place the scanning axocoel, the laser tube optical axis position is adjusted with active screw and passive addendum cone in two ends, and the laser signal of reception carries out the balance of signal by automatic gain amplifier 69 behind prime amplifier 60, make emissive power differ 10
2-10
3Received signal doubly is through automatic gain amplifier 69 backs equal energy reliable reception, in order to increase the antijamming capability of background stray light to external world, in receiving camera lens 3, be provided with interference filter 55, in angle measurement servo tracking 21, increased laser signal automatic search circuit 76, in case camera lens misalignment target hot spot C, automatic search circuit 76 can order servomotor power amplifiers 72 makes the control of servomotor 42 separating signals and makes angle measurement servo tracking 21 make the pitching searching moving, in order to improve the overshoot oscillatory occurences of angle measurement servo tracking 21 in tracking servo, angle measurement feedback speed measuring motor 43 is set, it is coaxial with angle measurement servomotor 42, microcomputer 31 is monitored by 71 pairs of servo level vibrations of level converter, automatically control the most accurate angle measurement sampling location and time.
Laser scanning system is by scanning transmission worm gear pairs 33,48, members such as stepper drive motors 32 and secondary light electricity reseting disk 34 and 49 are formed, the return difference structure that disappears that worm gear 48 is made up of main pair sheet connects stepper drive motors 32 and scans worm screw 33, stepper drive motors 32 and microcomputer 31 connections with shaft joint.
The laser scanning resetting system comprises: output reset pulse D, E that secondary resets in the optical disc 65,66 reset and door 70 places converge in two-stage, export a reset pulse and enter microcomputer 31.
Steering gear is by generating laser support 10, laser beam right angle emission that pentaprism displacement axle 85, pentaprism retainer spring 84, pentaprism fixed mount and pentaprism 54 constitute and level emission steering gear, laser beam right angle emission when doing section survey, making verification laser beam right alignment, the horizontal emission of lasering beam of employing when front and back are looked point and rough grade measurement of the level.
Output system comprises that scan angle shows 14, and measuring distance shows 15, printer 7.
Anti-jamming circuit comprises that the oscillator frequency is asynchronous with the alterating and direct current source frequency in the phase-sensitive detector (PSD) 74, and bandpass filter is set, and makes the signal with the phase sensitive detection frequency-independent can not enter servo-drive system.
The present invention has following characteristics:
(1) complete machine comprises 33 kilograms of power supply, tripod general assembly (TW)s, and three people can finish whole operations.
(2) the beamhouse operation work of a section of measurement only needs 10～12 minutes, and easy and simple to handle, data are directly perceived.
(3) can be applied to the measurement of tunnel, underground works, electrifing railway contacting net construction location etc., and the non-cpntact measurement of other cave profile and equipment location.
(4) measuring object can be carbonaceous shale, coal seam, and very low country rock or the lining cutting of other reflecting rates.
Fig. 1: laser measuring instrument for tunneling cross-section measuring principle figure
Fig. 2: Laser emission, scanning, kinematic train synoptic diagram
Fig. 3: unitary construction front view (FV)
Fig. 4: mechanizing circuit schematic diagram
Fig. 5: laser angular measurement step-by-step counting and reset circuit schematic diagram
Fig. 6: tuning fork slit oscillator photoelectricity reception work synoptic diagram
Fig. 7: laser beam emitting device work synoptic diagram
Now further narrate the present invention in conjunction with the accompanying drawings.
Referring to Fig. 1: at the right-angle triangle ABC of measured tunnel cross-section
nIn, b=AB is the apparatus measures base length, it is parallel with tunnel axis DY, AC
nBe generating laser 2 emitted laser bundles, C
nBe the hot spot point of laser beam irradiation to the object.Because the optical axis of laser pick-off 3 is tracking aiming C accurately
nPoint, angle-measuring equipment also can accurately be measured ABC
nThe α angle, through r
n=bt
gRadius r is obtained in the computing of α
nValue.
With ABC
nThe vertical ， And in plane is with AC
nFor the XZ plane of common edge is the tunnel survey plane, the intersection of plane and tunnel wall is range line profile, or claims laser scanning optical track line.The present invention adopts discontinuous pole coordinate parameter mensuration to obtain the polar coordinate measurement parameter of section, as getting scan angle theta at regular intervals
1, θ
2θ
n, measure corresponding r
1, r
2R
nCalculate the tunnel cross-section area that measures with the sectorial area formula.
1-plumb bob 4-fuselage 5-tripod.
Referring to Fig. 2: laser transmitting system is by laser tube 51, Laser emission axial adjustment ring stand 29, and generating laser 2, transmitter rack 10, laser tube power supply 36 compositions such as grade, above-mentioned parts all are positioned on the main shaft 47.The Laser emission axle is initiatively adjusted screw rod 53 and passive adjustment swivel nut 30 threaded engagement of Laser emission axle, microcomputer 31 and control and the digital display circuit board of LED are placed in fuselage main shaft 47 both sides, stepper drive motors 32 driven sweep worm screws 33, the laser scanning resetting means comprises the scan angle first order optical disc 34 that resets, the scan angle second level optical disc 49 that resets, they connect bundle 50 by clockwork spring shape main shaft lead and are connected on the fuselage main shaft 47.Realize getting at regular intervals scan angle theta by scanning angle measurement swivel mount 35
1, θ
2θ
nFunction, the angle measurement tracking means comprises tracking servo circuit plate 38, circuit board seal closure 39, angle measurement follower head transverse axis 40, kinematic train comprises driving cog wheel cover 41, angle measurement servomotor 42, angle measurement feedback speed measuring motor 43, angle measurement driven wheel 44, angle measurement final stage gear 45, angle measurement speed change intermediate gear pay 46.
Referring to Fig. 3: unitary construction front view (FV), generating laser 2, laser pick-off camera lens 3, tripod 5, controller 6, printer 7, fuselage front pole-bracket 8, generating laser protect frame 9, generating laser support 10, fuselage framework 11, fuselage handle 12, panel carrying handle 13, the digital display window 14 in laser scanning angle, the digital display window of measurement radius 15, two bit scan angles are given and are put dial 16, and angle measurement tracking mode luminotron shows 17, the angle measurement sound and light alarm 18 that transfinites, angle measurement precise worm 19, angle measurement precision sector worm gear 20, laser tracking head 21, the worm gear return difference extension spring 22 that disappears, fuselage air level 23, band corner scale base 24, fuselage back pole-bracket 25, fuselage vertical shaft drag knob 26, power of alterating and direct current case 27, level is adjusted seat 28, fuselage vertical shaft 54.Plumb bob 1
Referring to Fig. 4: mechanizing circuit schematic diagram: 6328A ° interference filter, tuning fork oscillator drive coil 56, tuning fork oscillator 57, photomultiplier 58, slit oscillator circuit 59, prime amplifier 60, the angle measurement reversible counting one-level photelectric receiver 61 that resets, the angle measurement secondary photelectric receiver 62 that resets, three grades of photelectric receivers 63 that reset of angle measurement, worm sector photoelectricity resets and cuts mating plate 64, the scan angle one-level photelectric receiver 65 that resets, the scan angle secondary photelectric receiver 66 that resets, angle measurement resets and door 67 for three grades, angle measurement pulse orientation identification circuit 68, automatic gain reference mark 69, the scanning secondary resets and door 70, level converter 71, servomotor power amplifier 72, servo direct current amplifier 73, servo phase-sensitive detector (PSD) 74, laser signal AC amplifier 75, laser signal automatic search circuit 76,90 ° of reflections of laser pentaprism 77.
Comprise in the controller 6 that measuring scanning key 86, point surveys key 87, just sweeping key 88, contrary key 89, reset key 90, a house point key 91, the speed key 92 swept.
Referring to Fig. 5, Fig. 6, photomultiplier high-voltage power supply 78, tuning fork oscillator slit sheet 79, laser focusing image point 80, slit 81, lens jacket 82.
Referring to Fig. 7: pentaprism fixed mount 83, pentaprism retainer spring 84, pentaprism displacement axle 85.
Now narrate the key technical indexes of the present invention and process of measurement in conjunction with specific embodiments:
Measure radius R=1.5 meter～9.5 meters, 30 °～330 ° of angle measurement scopes,
Polar coordinate scanner angular region: θ=30 °～330 ° of baseline b length=60cm,
Measuring error: △ R≤± 2.5 ‰
△e≤±0.01°
Measurement data acquisition density: 1 °～99 ° integer degree give arbitrarily and putting
Measuring speed: average one group of data/15 second
Measure operation function: full-automatic, can manually give up a little or mend point.
Data output pattern:
(1) LED is digital shows: scan angle
Measuring distance
(2) figure punch: scan angle
Measuring distance
Area S
Maximum left side width
Maximum right side width
Maximum section width
Maximum profile height.
Power supply kind: (1) alternating current 220V stabilized voltage supply double as charge power supply of battery
(2) rechargeable type Ni-Cr battery case
Three grades of driving-chains of transmission adopted, its ratio of gear is respectively 4.8,6.25,400, overall ratio i=12,000
Angle measurement reversible counting dish in measurement count and the resetting system rotates and sends 30 pulses a week, suitable 0.001 ° (3.6 "), scanning θ
nFrom θ
1=30 ° to θ
n=330 °, can give arbitrarily at 1 °～99 ° and put measuring point angular interval △ θ, the maximum measuring points of section are 301.The variable range of worm sector 20 is decided to be 68 °～87 °, only locates to export a reset pulse that resolution is suitable with count pulse about 68 °, so angle measurement counting reset position is at 68 °.Stepper motor 32 adopts three-phase two to clap, and the step angle is 3 ° a micromachine, and scan angle angle measurement counting is directly taken from the driving pulse of stepper motor.The principle of work of reset pulse and angle measurement pulsion phase are together.
The complete machine operation steps is:
(1) open Laser Power Devices switch and Laser emission skull,
(2) open complete machine power switch and lens cap, dial and to decide scan angle and give and put spacing value, press section precision needs, can be in 1 °～99 ° scopes on instrument panel, give and putting with two decimal system dial arbitrary integer degree.
(3) press reset key 90 on the controller 6, make microcomputer initialization And automatically from 180 ° of positions to 30 ° of scanning directions, as desire to add fast scan speed, by the contrary key 89 of sweeping, the angle measurement tracking lens comes and goes the search laser spots in 68 °～87 ° scopes, finds promptly to enter essence behind the luminous point and take aim at tracking mode, after 30 ° of the instrument arrival starting points, scanning corner LED demonstration " 30.00 " is awaited orders.
When (4) scan angle places the optional position,,, can make laser beam, scanning be stopped by stop key 86 to 330 ° of scanning directions by just sweeping key 88 by reset key 90, against sweeping key 89, when key 87 is swept in survey, all can making laser beam against returning to 30 °.
(5) sweep key 87 by survey, instrument can scan automatically, follows the tracks of, essence is retouched measurement, LED shows, prints pole coordinate parameter, and turn back automatically 180 °, the Yin And of Daing show cross-sectional area S, section maximum height H, section breadth extreme B.
(6) in measuring scanning process, augment as need and to give the measuring point of putting beyond the angle, can sweep key 87 by survey, can outside giving the value of putting, increase the polar coordinates measuring point.When run in the measuring process signal too a little less than, found range closely or far away excessively, the angle measurement camera lens, will send optoacoustic and report to the police when still can not find laser signal through omnidistance collection the once, And increases automatically and sweeps 1 °, to skip this measuring point, so circulation is carried out and is ended up to aiming symbol.
(7) for the measuring point of augmenting is located accurately, before scanning arrival was augmented a little, by speed key 92 speed changing function keys, scanning can be carried out by reduction of speed, again by the speed key, scanned and promptly recovered conventional speeds behind the benefit point.As desire to cast out to give and put measuring point, can press house point key 91.
Claims (17)
1, a kind of portable laser measuring instrument for tunneling cross-section comprises laser transmitting system, receiving system, and scanning system, microcomputer, systems such as power supply, feature of the present invention is:
A, laser beam project to the target hot spot C, the process that are measured on the object and receive camera lens 3, focus on the back and on tuning fork oscillator 57, produce laser image point 80, tuning fork oscillator 57 and slit sheet 79 produce continuous oscillation Z waveform under the effect of slit oscillator circuit 59 and oscillator coil 56, constantly laser image point 80 is hindered and cut, make photomultiplier 58 output alternating signal J, Z and J waveform are delivered to phase-sensitive detector (PSD) 74 and are compared after prime amplifier 60 amplifies, output direct current tracking level is through direct current amplifier 73, servo power amplifier 72 rear drive servomotors 42;
B, servomotor 42 drive angle measurement reversible counting optical disc 37 and constitute one-level photelectric receiver 61, the angle measurement driven wheel 44 that is installed on the servomotor 42 is paid 46 connection angle measurement final stage gears 45 by the angle measurement speed change intermediate gear, constitute secondary photelectric receiver 62, the final stage worm sector pays 19, worm gear 20 constitutes three grades of photelectric receivers 63, formation is installed on the kinematic train, can improve the three grades of optical disc step-by-step countings and the resetting means of precision;
2, by the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: be provided with two row's phase differential on the angle measurement reversible counting optical disc 37 in pulse-counting system and be 90 ° photoelectricity hole a
2, a
3With reset hole a
1, one-level photelectric receiver 61 sends A
1, A
2, A
3Pulse, A wherein
2, A
3Pulse enters microcomputer 31 countings by angle measurement pulse orientation identification circuit 68;
3, press the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: three grades of driving-chains of transmission adopted, watch in the angle measurement wherein that speed gear pays 46, angle measurement final stage gear 45 is involute cylindrical gear, final stage is a precision sector worm gear pairs 19,20, adopt the Pyatyi worm gear, on worm gear, establish one group of return difference tension spring 22 that disappears, control driving-chain final stage swing angle error delta
0;
4, press the portable laser measuring instrument for tunneling cross-section of claim 1 or 2, it is characterized in that: a certain ad-hoc location in complete machine angle measurement scope is provided with the multiple positional number mechanism of three grades of photoelectricity, photoelectricity receives camera lens 3 and whenever runs to this position and just send one to microcomputer 31 and put rapid pulse accurately and dash, and the angle measurement pulse is just counted in the basic enterprising horizontal pulse that this puts several angles;
5, press the portable laser measuring instrument for tunneling cross-section of claim 1 or 4; It is characterized in that: three grades of photoelectricity reset circuits in the pulsed reset device comprise that one-level photelectric receiver 61 receives, by the reset hole a on the reversible counting optical disc 37
1The reset pulse A of output
1; Reset pulse B by the b unthreaded hole output in the two aurora electricity receiver 62, reset pulse C by the blocking unthreaded hole c in three grades of photelectric receivers 63 output resets and door 67 places converge at three grades, export a specific reset pulse, enter microcomputer 31, directly control reseting precision by reseting pulse width;
6, by the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that:, in receiving camera lens 3, be provided with interference filter 55 in order to increase the antijamming capability of background stray light to external world;
7, press the portable laser measuring instrument for tunneling cross-section of claim 1 or 5, it is characterized in that: in angle measurement servo tracking 21, increased laser signal automatic search circuit 76, in case camera lens is failed the hot spot that aims at the mark, automatic search circuit 76 can order servomotor power amplifiers 72 makes the control of servomotor 42 separating signals and makes angle measurement servo tracking 21 make the pitching searching moving;
8, by the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: the laser signal of reception carries out the balance of signal by automatic gain amplifier 69 behind prime amplifier 60, make emissive power differ 10
2～10
3Received signal doubly all can reliably absorb through behind the automatic gain amplifier 69;
9, by the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: in order to improve the overshoot oscillatory occurences of angle measurement servo tracking 21 in tracking servo, angle measurement feedback speed measuring motor 43 is set, it is coaxial with angle measurement servomotor 42; Microcomputer 31 is monitored by 71 pairs of servo level vibrations of level converter, automatically control the most accurate angle measurement sampling location and time;
10, press the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: laser scanning system is by scanning transmission worm gear pairs 33,48, members such as stepper drive motors 32 and secondary light electricity reseting disk 34 and 49 are formed, the return difference structure that disappears that worm gear 48 is made up of main pair sheet, connect stepper drive motors 32 and scanning transmission worm gear pairs 33 with shaft joint, stepper drive motors 32 connects with microcomputer 31;
11, press the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: the laser scanning resetting system comprises: output reset pulse D, E that secondary resets in the optical disc 65,66 reset and door 70 places converge at secondary, export a reset pulse and enter microcomputer 31;
12, by the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: laser transmitting system adopts miniwatt He-Ne laser tube, directly places the scanning axocoel, and two ends are with initiatively screw and passive addendum cone are adjusted the laser tube optical axis position;
13, press the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: emission of laser beam right angle and level emission steering gear that steering gear is made of generating laser support 10, pentaprism displacement axle 85, pentaprism retainer spring 84, pentaprism fixed mount and pentaprism 54, laser beam right angle emission when doing section survey, make verification laser beam right alignment, the horizontal emission of lasering beam of employing when front and back are looked point and low precision measurement of the level;
14, by claim 1 or 10 portable laser measuring instrument for tunneling cross-section, it is characterized in that: adopt the sixteen bit scale-of-two that is provided with on the microcomputer 31 load switch 90 angle fine setting that resets that resets, so that maintenance and check angle measurement and be reset to ad-hoc location;
15, by the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: output system comprises that scan angle shows 14, and measuring distance shows 15, prints 7 compositions such as grade; Two dial 16 are that spacing value is adopted at artificial input scan angle;
16, by the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: controller 6 by measure stop key 86, survey sweep key 87, just sweep key 80, the contrary key 89, microcomputer reset key 90, a house point key 91, speed key 92 swept formed also and directly is connected with microcomputer 31;
17, press the portable laser measuring instrument for tunneling cross-section of claim 1, it is characterized in that: anti-jamming circuit is asynchronous with the alterating and direct current source frequency by oscillator frequency in the phase-sensitive detector (PSD) 74, and bandpass filter is set, make the signal with the phase sensitive detection frequency-independent can not enter servo-drive system;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101789.XA CN1005362B (en) | 1987-03-12 | 1987-03-12 | Portable laser measuring instrument for tunneling cross-section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101789.XA CN1005362B (en) | 1987-03-12 | 1987-03-12 | Portable laser measuring instrument for tunneling cross-section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87101789A true CN87101789A (en) | 1987-09-09 |
| CN1005362B CN1005362B (en) | 1989-10-04 |
Family
ID=4813630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87101789.XA Expired CN1005362B (en) | 1987-03-12 | 1987-03-12 | Portable laser measuring instrument for tunneling cross-section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005362B (en) |
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- 1987-03-12 CN CN87101789.XA patent/CN1005362B/en not_active Expired
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| CN104613887B (en) * | 2015-01-23 | 2017-04-19 | 山东大学 | Tunnel section sedimentation and convergence analytical instrument and measuring method |
| CN104613887A (en) * | 2015-01-23 | 2015-05-13 | 山东大学 | Tunnel section sedimentation and convergence analytical instrument and measuring method |
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| CN105136115B (en) * | 2015-10-08 | 2017-06-16 | 北京中力智研物联科技有限公司 | A kind of method and apparatus of automatic measurement tunnel cross-section deformation |
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| CN117516641A (en) * | 2024-01-05 | 2024-02-06 | 山东中云电科信息技术有限公司 | Channel section flow measurement equipment |
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