CN108032926A - Paddy field mud foot depth survey remote operated vehicle - Google Patents
Paddy field mud foot depth survey remote operated vehicle Download PDFInfo
- Publication number
- CN108032926A CN108032926A CN201711294616.4A CN201711294616A CN108032926A CN 108032926 A CN108032926 A CN 108032926A CN 201711294616 A CN201711294616 A CN 201711294616A CN 108032926 A CN108032926 A CN 108032926A
- Authority
- CN
- China
- Prior art keywords
- chassis
- paddy field
- mud
- control
- control panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 37
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 241000209094 Oryza Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009328 dry farming Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011326 mechanical measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D63/00—Motor vehicles or trailers not otherwise provided for
- B62D63/02—Motor vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D63/00—Motor vehicles or trailers not otherwise provided for
- B62D63/02—Motor vehicles
- B62D63/04—Component parts or accessories
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/26—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring depth
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a kind of paddy field mud foot depth survey remote operated vehicle, solves the problems such as existing paddy field mud foot depth survey is time-consuming and laborious, precision is poor.Technical solution includes the driving chassis with lithium battery module, the display on driving chassis and control assembly, enters mud component and measurement assembly, and the driving chassis is four-wheel drive chassis；The display control component, which includes the control panel being fixed on warehouse and the display control screen being connected with the control panel, Big Dipper positioning antenna, Beidou positioning module and wireless communication antenna, the measurement assembly, includes displacement sensor right angle setting on the supporting plate.The present invention can substitute that artificial, time saving and energy saving, precision is high, good reliability, multiple spot continuously and quickly measuring, rapid data transmission, obstacle detouring can be achieved and anti-to be absorbed in performance strong completely.
Description
Technical field
The present invention relates to agricultural mechanical field, and in particular to a kind of paddy field mud foot depth survey remote operated vehicle.
Background technology
Rice Production occupies highly important status in China's grain-production.Just have in the traditional Rice Production in China
Intensive cultivation is carefully harrowed, and only field etc. requires very little water, and cultivated whole requirement of the modern mechanic rice transplanting equally to rice terrace is very high.In China south
Typical paddy field environment (dry farming paddy field, summer paddy field ploughing, land reclaimed from a lake, waterlogged plot) the four kinds of mud foot depth in four kinds of side are not quite similar, different mud feet
Depth is to water field ploughing process important.
China there is no the mud foot depth measurement method and measuring apparatus of standard at present, and traditional mud foot depth survey is people
Estimating depth after work measurement, not only time-consuming and laborious, inefficiency but also precision is low, poor reliability, unanimously cannot accurately provide
Mud foot depth data, also can not quickly measure real-time Transmission digitalized data.Can then be existed using simply improved mechanical measurement
Obstacle detouring and it is anti-fall into difficult, measuring speed is slow, measurement when plug resistance is big, the problems such as data transfer is inconvenient, which needs
To solve as early as possible.
The content of the invention
The purpose of the present invention is to solve above-mentioned technical problem, there is provided one kind can substitute artificial, time saving and energy saving, smart completely
Degree height, good reliability, can be achieved multiple spot continuously and quickly measuring, rapid data transmission, obstacle detouring and prevent being absorbed in the strong paddy field mud of performance
Foot depth survey remote operated vehicle.
Paddy field mud foot depth survey remote operated vehicle, including the driving chassis with lithium battery module, arranged on driving chassis on
Display and control assembly, enter mud component and measurement assembly, the driving chassis is four-wheel drive chassis；The display control group
Part includes the control panel being fixed on warehouse and the display control screen being connected with the control panel, Big Dipper positioning antenna, the Big Dipper
Locating module and wireless communication antenna；It is described enter mud component include be vertically mounted on driving chassis on support plate, the support
The upper end of plate is equipped with pressurization motor and the gear reducer being connected with pressurization motor, and the output terminal of the gear reducer connects vertical pressurization
Screw rod, it is described pressurization screw rod on be threaded with pressurizing nut, the pressurizing nut is connected through entering muddy and slippery bar with entering mud plate, described
The bottom surface for entering mud plate is equipped with pressure sensor；The measurement assembly includes displacement sensor right angle setting on the supporting plate, institute
The sliding block of displacement sensors through connecting rod with it is described enter muddy and slippery bar be connected；The control panel also respectively with four-wheel drive chassis
Chassis control module, pressurization motor, displacement sensor and pressure sensor connection；The lithium battery module passes through the chassis
Plate provides electric energy to control module in order to control.
The bottom surface on the four-wheel drive chassis is additionally provided with infrared distance sensor, the infrared distance sensor and the control
Making sheet connects.
Institute's displacement sensors are magnetostrictive displacement sensor.
Be provided with through hole on the four-wheel drive chassis, it is described enter mud component the muddy and slippery bar that enters be located in through hole.
It is the guide groove being oriented into muddy and slippery bar that the support plate hypomere, which is equipped with,.
The display and control assembly further include the attitude transducer being connected with control panel.
For problem present in background technology, inventor is considered as remote operated vehicle to substitute manually, and the remote control is small
Car uses four-wheel drive chassis, so as to walk and flexibly turn in muddy ground well, obstacle detouring and anti-to be absorbed in performance good.Using entering
Mud component and measurement assembly coordinate, and enter mud component and provide driving force using pressurization motor, pressurization is applied a force upon by gear reducer
On screw rod, active force downward vertically is transformed into by the cooperation of pressurize screw rod and the spiral shell nurse that pressurizes, is acted on through entering muddy and slippery bar
Enter mud plate, this significant effect simple in structure, lower pressure is quick, accurate and effective, and not only can effectively replace manually pushes, and also solves
Determined by parts self gravitation push existing for inefficiency, reliability is poor the problem of.It is described enter mud plate bottom surface be equipped with
Pressure sensor is used to detect lower pressure resistance, when measuring pressure and increasing to setting value, then is judged to bottoming out, control panel can control
Pressurization motor is stopped, while reads the measured value of displacement sensor.The measurement assembly uses displacement sensor, this area
Technical staff can select suitable displacement sensor as needed, this is the prior art, its concrete structure is not described further.It is preferred that adopt
With magnetostrictive displacement sensor, which is sliding matching structure of the sliding block in measurement bar, utilizes magnetostrictive displacement
Principle measures shift value, its sliding block can be connected by connecting rod with entering muddy and slippery bar, and the position of muddy and slippery bar is entered so as to synchro measure
Shifting value, the data measured are read rapidly by control panel.
Be additionally provided with infrared distance sensor in the bottom surface on the four-wheel drive chassis, the infrared distance sensor with it is described
Control panel connects.Before measurements, by infrared sensor measure four-wheel drive undersurface of bottom disc terrain clearance, then control into
Muddy and slippery plate keeps concordant with the bottom surface on four-wheel drive chassis and is used as initial displacement data, and the shift value obtained after measurement subtracts
The terrain clearance on four-wheel drive chassis, is paddy field mud foot depth.
Institute's displacement sensors can reasonably select as needed, particularly preferably magnetostrictive displacement sensor.Enter mud
The displacement of slide bar can be reached on the sliding block of magnetostrictive displacement sensor by connecting rod, form sliding block and magnetostrictive displacement passes
Relative displacement between the measurement bar of sensor, so as to produce displacement measurement, using magnetostrictive displacement sensor good reliability,
Precision is high.
Through hole is opened up on the four-wheel drive chassis, makes to enter vertical direction work of the muddy and slippery bar along through hole into mud component
Make, improve component stability in use, reduce external interference, be conducive to keep preferably entering mud posture into mud component；Further lead to
It is to be oriented into muddy and slippery bar to cross guide groove, improves the stability for entering mud posture into muddy and slippery bar；Attitude transducer is monitored into mud in real time
Slide bar enters mud posture.
The data-signal of each sensor such as pressure sensor, displacement sensor, infrared distance sensor and attitude transducer
It is sent into control panel and is stored, calculated and judged, and can be shown in control display screen, control panel is also with entering mud component
The chassis control module on pressurization motor and four-wheel drive chassis communicate and output control signal.
The four-wheel on the four-wheel drive chassis has individual motor and retarder driving, improves obstacle detouring and prevents being absorbed in performance.It is logical
Wireless receiving remote control command is crossed, moves to measurement position；Antenna record measurement is positioned by Beidou positioning module and the Big Dipper
Position and movement locus.All motors and all control panels can ensure field by rechargeable lithium battary module for power supply
The requirement of data acquisition mobility.Data by being wirelessly transmitted back to work station, monitor on work station at the same time and database software can
Real time monitoring measuring apparatus operating status simultaneously preserves return data, easy to subsequent treatment.All devices in robot pass through
Lithium battery module power supply on four-wheel drive chassis.
The present invention has obstacle detouring and prevents being absorbed in strong performance, easy to operate, simple and reliable for structure, high certainty of measurement, measurement speed
Degree is fast, labor intensity is low, can real-time radio passback, preserve and the advantages that analysis data.
Brief description of the drawings
Fig. 1 is structural assembly figure of the present invention；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is chassis structure schematic diagram of the present invention；
Fig. 4 is chassis structure bottom view of the present invention；
Fig. 5 is control principle drawing of the present invention.
Wherein, 1- magnetostrictive displacement sensors, 2- show and control assembly, 3- enter mud component, 4- four-wheel drives chassis,
5- infrared distance sensors, 6- electronics storehouse, 7- measurement bars, 8- sliding blocks, 9- connecting rods, 10- lithium battery modules, 11- guide grooves,
12- gear reducers, 13- pressurizations motor, 14- enter mud plate, 15- support plates, 16- pressurizations screw rod, 17- pressurizing nuts, the positioning of the 18- Big Dippeves
Antenna, 19- wireless communication antennas, 20- pressure sensors, 21- control panels, 22- display controls screen, 23- attitude transducers, 24-
Beidou positioning module, 25- enter muddy and slippery bar, 26- chassis controls module, 27- through holes.
Embodiment
Explanation is further explained to the present invention below in conjunction with the accompanying drawings：
With reference to Fig. 1, the present invention by paddy field mud foot depth survey remote operated vehicle by magnetostrictive displacement sensor 1, display and
Control assembly 2, enter mud component 3, four-wheel drive chassis 4 is formed.
Referring to Fig. 2, enter mud component 3 by pressurization motor 13, gear reducer 12 (preferably turbine worm reducer), pressurization screw rod
16th, pressurizing nut 17, support plate 15, guide groove 11, enter muddy and slippery bar 25, enter mud plate 14 and pressure sensor 20 forms.The branch
Fagging 15 is vertically mounted at the through hole 27 on four-wheel drive chassis 4, and the pressurization motor 13 and gear reducer 12 are driven by strong, and
It is fixed on the upper end of the support plate 15.The upper end of pressurization screw rod 16 is connected with the output terminal of gear reducer 12, is set with adds thereon
Press nut 17, the pressurizing nut 17 is welded on into muddy and slippery 27 upper end of bar, it is described enter muddy and slippery bar 27 lower end set into mud plate 14, institute
The bottom surface stated into mud plate 14 sets pressure sensor 20, it is described enter mud plate 14 and pressure sensor 20 use stainless steel, institute
State 15 hypomere of support plate be additionally provided with for enter muddy and slippery bar 17 linear movement guide guide groove 11.
The magnetostrictive displacement sensor 1 is purchased in market, including at least electronics storehouse 6, measurement bar 7 and sliding block 8.Electronics storehouse 6
7 upper end of measurement bar is fixed on, sliding block 8 is permanent magnet, when can be moved in measurement bar 7, utilizes magnetostrictive displacement principle, measurement
Electronics storehouse 6 exports absolute displacement signal.The sliding block 8 is by connecting rod 9 and enters muddy and slippery 17 gun iron link of bar.
Display and control assembly 2 are also installed on four-wheel drive chassis 4, it is by Big Dipper positioning antenna 18, wireless communication antenna
19th, control panel 21, display control screen 22, attitude transducer 23 and Beidou positioning module 24 are formed.Four-wheel drive chassis 4 passes through line
Cable is communicated and powered with control panel 21.The control panel 21 passes through cable and magnetostrictive displacement sensor 1 and pressurization motor 13
Connecting communication and power supply.The control panel 21 also positions antenna 18, wireless communication antenna 19, north with display control screen 22, the Big Dipper
Bucket locating module 24, pressure sensor 20 and attitude transducer 23 are connected with infrared distance sensor 5 by cable, are realized logical
News and power supply.
With reference to Fig. 3, the four-wheel drive chassis 4 is automatically controlled 4 wheel driven, and chassis control module 34 controls four-wheel four corresponding
Motor makes corresponding actions by specified requirement, its concrete structure is the prior art, is not described further, can using four-wheel drive chassis 4
To greatly improve trolley obstacle detouring and prevent being absorbed in performance.Referring to Fig. 4, the bottom surface on four-wheel drive chassis 4 is additionally provided with infrared Distance-sensing
Device 5, for measuring liftoff spacing；Lithium battery module 10 is installed on four-wheel drive chassis 4, and chassis control module 26 passes through cable
The electric energy that lithium battery module 10 provides is obtained, and detects cell operating status；Chassis control module 26 exports electric energy by cable
With four motors of control signal to four-wheel, control panel 21 is communicated by cable and infrared distance sensor 49 and provides electricity for it
Energy；Chassis control module 26 is also communicated and powered with control panel 21 by cable.
Operation principle：
Control panel 21 sends control signal and controls small garage to chassis control module 34 by wireless receiving telecommand
Walk, realize distant empty purpose.When row is to measurement point, remote operated vehicle stops moving ahead, and infrared distance sensor 5 measures the road clearance
Data send control panel 21 to；The control pressurization motor 13 of control panel 21 works, and drives pressurization screw rod 16 to rotate through retarder 14, makes
Pressurizing nut 17 is moved down along pressurization screw rod 16 is axial, until entering, 14 bottom surface of mud plate is concordant with four-wheel drive chassis 4, and control panel 21 is remembered
The record displacement data that magnetostrictive displacement sensor 1 transmits at this time is as initial displacement data；The control pressurization motor of control panel 21
13 work drives into 14 times immigration mud of mud plate up to touching paddy field substrate into muddy and slippery bar 25, enters the pressure sensor of 14 bottom surface of mud plate
After 20 monitoring pressure values reach setting value, signal sends control panel 21 to, and control panel 21 records magnetostrictive displacement sensing at this time
The displacement data that device 1 transmits, the mud foot depth data of the measurement point can be obtained by calculating；Detection completion rear control plate 21 is controlled
System pressurization motor 13 inverts, and the pressurized nut 17 of pressurization screw rod 16, enter muddy and slippery bar 25 and drive to move in mud plate 14 and four-wheel drives
The concordant height in dynamic chassis 4, prepares for measurement next time.Attitude transducer 23 monitors in real time enters mud posture into muddy and slippery bar, and will
Data are transmitted to control panel 21 and are recorded and analyzed judgement.Control panel 21 comes with wireless communication module, all data of reception
Data communication can be carried out by wireless communication antenna 19 and work station.
Claims (6)
1. a kind of paddy field mud foot depth survey remote operated vehicle, including the driving chassis with lithium battery module, arranged on driving chassis
On display and control assembly, enter mud component and measurement assembly, it is characterised in that the driving chassis is four-wheel drive chassis；
The display control component includes the control panel being fixed on warehouse and the display control screen being connected with the control panel, north
Bucket positioning antenna, Beidou positioning module and wireless communication antenna；It is described enter mud component include be vertically mounted on driving chassis on
Support plate, the upper end of the support plate are equipped with pressurization motor and the gear reducer being connected with pressurization motor, the output of the gear reducer
End connects vertical pressurization screw rod, is threaded with pressurizing nut on the pressurization screw rod, the pressurizing nut is through entering muddy and slippery bar
Be connected with entering mud plate, it is described enter mud plate bottom surface be equipped with pressure sensor；The measurement assembly includes being vertically mounted on support plate
On displacement sensor, the sliding blocks of institute's displacement sensors through connecting rod with it is described enter muddy and slippery bar be connected；The control panel also divides
Chassis control module, pressurization motor, displacement sensor and pressure sensor not with four-wheel drive chassis are connected；The lithium electricity
By the chassis control module, plate provides electric energy to pond module in order to control.
2. paddy field mud foot depth survey remote operated vehicle as claimed in claim 1, it is characterised in that the four-wheel drive chassis
Bottom surface is additionally provided with infrared distance sensor, and the infrared distance sensor is connected with the control panel.
3. paddy field mud foot depth survey remote operated vehicle as claimed in claim 1 or 2, it is characterised in that institute's displacement sensors
For magnetostrictive displacement sensor.
4. paddy field mud foot depth survey remote operated vehicle as claimed in claim 1, it is characterised in that on the four-wheel drive chassis
Be provided with through hole, it is described enter mud component the muddy and slippery bar that enters be located in through hole.
5. the paddy field mud foot depth survey remote operated vehicle as described in claim 1 or 4, it is characterised in that the support plate hypomere
Equipped with to enter the guide groove that muddy and slippery bar is oriented to.
6. the paddy field mud foot depth survey remote operated vehicle as described in claim 1 or 4, it is characterised in that the display and control
Component further includes the attitude transducer being connected with control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711294616.4A CN108032926B (en) | 2017-12-08 | 2017-12-08 | Remote control trolley for measuring depth of mud feet in paddy field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711294616.4A CN108032926B (en) | 2017-12-08 | 2017-12-08 | Remote control trolley for measuring depth of mud feet in paddy field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108032926A true CN108032926A (en) | 2018-05-15 |
| CN108032926B CN108032926B (en) | 2020-05-19 |
Family
ID=62101470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711294616.4A Expired - Fee Related CN108032926B (en) | 2017-12-08 | 2017-12-08 | Remote control trolley for measuring depth of mud feet in paddy field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108032926B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108955490A (en) * | 2018-08-17 | 2018-12-07 | 通微电气海安有限公司 | A kind of device of hand-held gaging hole depth |
| CN116793180A (en) * | 2023-08-29 | 2023-09-22 | 山西建筑工程集团有限公司 | Anti-collision wall deflection measuring device |
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| JP2008144385A (en) * | 2006-12-07 | 2008-06-26 | Maeda Corp | Apparatus and method for detecting height of placing of concrete |
| KR20130004679A (en) * | 2011-07-04 | 2013-01-14 | 현대중공업 주식회사 | Apparatus of measuring of subsea pipeline installation |
| CN205825895U (en) * | 2016-07-24 | 2016-12-21 | 山西省交通科学研究院 | A kind of quick measurement bridge pad comes to nothing the measuring instrument of degree |
| CN205940447U (en) * | 2016-08-03 | 2017-02-08 | 深圳蓄能发电有限公司 | Bore depth measuring instrument |
| RU2618487C1 (en) * | 2016-02-29 | 2017-05-03 | Публичное акционерное общество "Татнефть" им. В.Д. Шашина | Device for measuring depth of cable running in well |
| CN105021111B (en) * | 2014-07-18 | 2017-09-22 | 国家电网公司 | A kind of method of work for detecting convenient earthing bar buried depth detector |
-
2017
- 2017-12-08 CN CN201711294616.4A patent/CN108032926B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008144385A (en) * | 2006-12-07 | 2008-06-26 | Maeda Corp | Apparatus and method for detecting height of placing of concrete |
| KR20130004679A (en) * | 2011-07-04 | 2013-01-14 | 현대중공업 주식회사 | Apparatus of measuring of subsea pipeline installation |
| CN105021111B (en) * | 2014-07-18 | 2017-09-22 | 国家电网公司 | A kind of method of work for detecting convenient earthing bar buried depth detector |
| RU2618487C1 (en) * | 2016-02-29 | 2017-05-03 | Публичное акционерное общество "Татнефть" им. В.Д. Шашина | Device for measuring depth of cable running in well |
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| CN205940447U (en) * | 2016-08-03 | 2017-02-08 | 深圳蓄能发电有限公司 | Bore depth measuring instrument |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108955490A (en) * | 2018-08-17 | 2018-12-07 | 通微电气海安有限公司 | A kind of device of hand-held gaging hole depth |
| CN108955490B (en) * | 2018-08-17 | 2024-04-12 | 南京溥博渊泉环保科技有限公司 | Hand-held type hole depth measuring device |
| CN116793180A (en) * | 2023-08-29 | 2023-09-22 | 山西建筑工程集团有限公司 | Anti-collision wall deflection measuring device |
| CN116793180B (en) * | 2023-08-29 | 2023-10-31 | 山西建筑工程集团有限公司 | Anti-collision wall deflection measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108032926B (en) | 2020-05-19 |
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