CN114509090B - Error correction device and method for inclinometer for coal mine - Google Patents
Error correction device and method for inclinometer for coal mine Download PDFInfo
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- CN114509090B CN114509090B CN202111580994.5A CN202111580994A CN114509090B CN 114509090 B CN114509090 B CN 114509090B CN 202111580994 A CN202111580994 A CN 202111580994A CN 114509090 B CN114509090 B CN 114509090B
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- 239000003245 coal Substances 0.000 title claims abstract description 25
- 238000012937 correction Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 24
- 239000000523 sample Substances 0.000 claims abstract description 105
- 230000005291 magnetic effect Effects 0.000 claims abstract description 43
- 239000011159 matrix material Substances 0.000 claims description 22
- 230000001133 acceleration Effects 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000013598 vector Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005358 geomagnetic field Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/02—Magnetic compasses
- G01C17/28—Electromagnetic compasses
- G01C17/32—Electron compasses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The application discloses an error correction device of an inclinometer for a coal mine, which comprises a base and a non-magnetic rotary table arranged on the base, wherein the non-magnetic rotary table comprises a bracket and a coaxial plate connected with the bracket, and the coaxial plate is used for arranging a standard probe tube and a probe tube to be calibrated; the coaxial plate can pitch and roll on the bracket. After the probe tube to be calibrated is calibrated by adopting the application, the azimuth angle error can be controlled within +/-1.5 degrees, and the inclination angle and the facing angle error can be controlled within 0.2 degrees. Therefore, the application can effectively correct errors of the probe to be calibrated, and solves the problems of poor timeliness and increased cost caused by the fact that the calibration equipment is limited and can not be recalibrated on the coal mine site.
Description
Technical Field
The application relates to the technical field of inclinometers while drilling in coal mines, in particular to an error correction device and method for an inclinometer for coal mines.
Background
In coal mine safety production, a drilling method is generally adopted to realize exploration of hidden disaster-causing factors such as a downhole old goaf, a gas enrichment zone and the like, and how to judge whether an actual track of a drilling hole is drilled according to a designed track is a key in the drilling method, so that the exploration effect is greatly influenced. The mining inclinometer is used as a measuring device, is widely applied to the field of underground drilling measurement of coal mines, and achieves a good effect. Because of the special use environment of the underground coal mine, most of the current mining borehole inclinometers adopt a triaxial geomagnetic field sensor and a triaxial acceleration sensor to determine the posture of the inclinometers in the borehole. However, when the inclinometer is installed and used, the inclinometer is affected by various errors such as soft and hard ferromagnetic interference errors, installation errors, sensitivity errors, quadrature errors and the like, and the errors can cause larger deviation between measured data and real data, so that the measuring effect is affected. Therefore, the inclinometer needs to carry out compensation correction on the errors before being used so as to reduce the influence of the errors on the measurement result.
The current error compensation method for the inclinometer mainly aims at the electronic compass in the inclinometer to compensate, and the adopted methods comprise least square fitting, ellipse fake trying and the like, but the methods need a non-magnetic turntable with higher precision to provide a space standard position for calibration. Usually before the inclinometer leaves the factory, can accomplish the demarcation work on laboratory high accuracy does not have magnetic turntable, and the no magnetic turntable 0 azimuth line that uses needs to be unanimous with local geomagnetic north bit line, and local geomagnetic north bit line needs to confirm with the help of high accuracy measurement geomagnetic field measuring device. However, after the inclinometer probe tube is used for a period of time in the coal mine, the measurement error is increased due to the drift of the internal sensor and the residual magnetization intensity generated by an external magnetic field, and the inclinometer probe tube needs to be recalibrated. This will typically require the return of the probe to the manufacturer and recalibration on the laboratory nonmagnetic turret, but this will result in delays in the operation of the coal mine site, reduced efficiency and increased costs.
Disclosure of Invention
Aiming at the defects of the prior art, the application aims to provide an error correction device and method for a coal mine inclinometer, which solve the problem of poor timeliness caused by the fact that a high-precision non-magnetic turntable cannot be used in a coal mine site in the prior art.
In order to solve the technical problems, the application adopts the following technical scheme: the error correction device of the inclinometer for the coal mine comprises a base and a non-magnetic rotary table arranged on the base, wherein the non-magnetic rotary table comprises a bracket and a coaxial plate connected with the bracket, and the coaxial plate is used for arranging a standard probe tube and a probe tube to be calibrated;
the coaxial plate can pitch, roll or pitch and roll on the bracket.
The application also has the following technical characteristics:
the bracket is of a T-shaped structure and comprises a first bracket rod and a second bracket rod which is vertically connected with the first bracket rod, and one end of the first bracket rod is connected with the middle part of the second bracket rod;
the first bracket rod is connected with the base through a bracket connecting rod, and the coaxial plate is connected with one end of the second bracket rod;
the first bracket rod can rotate along the axis of the first bracket rod, and the coaxial plate can rotate along the axis of the second bracket rod.
The coaxial plate is provided with a plurality of grooves parallel to the second bracket rod, the coaxial plate is also provided with a probe tube fastening screw and a probe tube fixing clamp, and the grooves, the probe tube fastening screw and the probe tube fixing clamp are used for fixing a standard probe tube and a probe tube to be calibrated;
the coaxial plate is sleeved with the second bracket rod, and the position is fixed through the coaxial plate fastening screw.
The first bracket rod is sleeved with a bracket sleeve, the bracket sleeve is fixedly connected with the bracket connecting rod, and the first bracket rod can rotate in the bracket sleeve.
One end of the bracket sleeve is provided with a bracket rotating handle, and the other end of the bracket sleeve is provided with an inclination angle dial;
the bracket sleeve is provided with a bracket fastening screw which is used for fixing the relative position of the first bracket rod;
the other end of the first bracket rod connected with the second bracket rod is provided with a counterweight, and the other end of the second bracket rod connected with the coaxial plate is also provided with a counterweight.
The coaxial plate is provided with a coaxial plate rotating handle, and the second bracket rod is also provided with an angle-facing dial.
The base is provided with a base horizontal adjusting screw.
An error correction method of an inclinometer for a coal mine is carried out by adopting the device.
The method comprises the following steps:
step 1, adjusting a base horizontal adjusting screw on a base by using a horizontal ruler, adjusting the base to be horizontal, fixing a standard probe and a probe to be calibrated in a groove on a coaxial plate by using a probe fastening screw and a probe fixing clamp respectively, connecting the standard probe and the probe to be calibrated with a computer through a communication cable, opening calibration software, and reading probe data in a static state;
step 2, loosening a probe fastening screw on the probe to be calibrated, and rotating the probe to be calibrated to enable the initial facing angle gamma of the probe to be calibrated 0 Initial facing angle gamma with standard probe 1 The same;
step 3, rotating the nonmagnetic rotary table according to the given position, and recording the triaxial magnetic sensor components H of the standard probe 3 and the probe 4 to be calibrated at each position 1 ＝[H x1 ,H y1 ,H z1 ]，H 0 ＝[H x0 ,H y0 ,H z0 ]Triaxial acceleration sensor component G 1 ＝[G x1 ,G y1 ,G z1 ]，G 0 ＝[G x0 ,G y0 ,G z0 ]；
The rotation position of the nonmagnetic turntable is given as follows:
at the position ofIn the range, the inclination angle alpha of the rotary calibration table is M times altogether, the face angle gamma is rotated for N times under each inclination angle position, N groups of triaxial data are collected, and M.N groups of data are collected altogether;
step 4, fitting the acquired data of the magnetic sensor and the acceleration sensor of the standard probe tube and the probe tube to be calibrated to obtain a magnetic sensor calibration matrix and an acceleration sensor calibration matrix;
taking a magnetic sensor as an example, the magnetic sensor of the standard probe 3 is used for collecting data H 1 ＝[H x1 ,H y1 ,H z1 ]As the triaxial magnetic component theoretical value of the probe 4 to be calibrated, and modeling the error of the probe to be calibrated, the formula is as follows:
H 1 ＝K h ·H 0 +B h (1)
h in 1 Data vectors are acquired for the triaxial magnetic sensor of the standard probe 3, H 0 Data vectors, K, are acquired for the triaxial magnetic sensor of the probe 4 to be calibrated h A 3×3 calibration coefficient matrix, B h Is normalA number matrix. The coefficient matrix K can be solved by the least square method h Sum constant matrix B h Is a solution to the optimization of (3).
Similarly, the coefficient matrix K of the acceleration sensor can be obtained g And B g 。
Step 5, writing the calculated calibration matrix of the magnetic sensor and the calibration matrix of the acceleration sensor into a memory in the probe tube 4 to be calibrated for storage, and calculating the inclination angle, azimuth angle and facing angle after calibration through formulas (1) - (3);
compared with the prior art, the application has the following technical effects:
the device provided by the application effectively solves the problems of poor timeliness and increased cost caused by the fact that calibration equipment is limited and recalibration cannot be carried out on site after the conventional inclinometer for the coal mine leaves a factory.
And (II) the method can effectively correct the error of the probe tube to be calibrated, is simple, and saves manpower and material resources.
Drawings
Fig. 1 is a schematic diagram of the structure of the present application.
Fig. 2 is a schematic structural diagram of the present application in a specific application.
FIG. 3 is a flow chart of a method for error correction of inclinometers.
Fig. 4 is a graph of data alignment before and after correction of a certain axis of a three-axis magnetic sensor.
Fig. 5 is a corrected azimuth error curve.
Fig. 6 is a corrected face angle error curve.
Fig. 7 is a corrected caster error curve.
Meaning of the individual reference numerals in the drawings: 1-base, 2-non-magnetic turntable, 3-bracket, 4-coaxial plate, 5-first bracket rod, 6-second bracket rod, 7-bracket connecting rod, 8-groove, 9-probe fastening screw, 10-probe fixing clamp, 11-coaxial plate fastening screw, 12-bracket sleeve, 13-bracket rotating handle, 14-inclination angle dial, 15-bracket fastening screw, 16-counterweight, 17-coaxial plate rotating handle, 18-facing angle dial, 19-base horizontal adjusting screw, 20-communication cable, 21-computer, 22-standard probe, 23-probe to be calibrated,
the following examples illustrate the application in further detail.
Detailed Description
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present application fall within the protection scope of the present application.
The terms "upper," "lower," "front," "rear," "top," "bottom," and the like are used herein to refer to an orientation or positional relationship for ease of description and simplicity of description only, and are not intended to indicate or imply that the devices or elements being referred to must be oriented, configured and operated in a particular orientation, with "inner," "outer" referring to the inner and outer sides of the corresponding component profiles, and the above terms are not to be construed as limiting the application.
In the present application, unless otherwise indicated, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.
All parts of the application, unless otherwise specified, are known in the art.
Example 1:
according to the technical scheme, as shown in fig. 1-7, the error correction device of the inclinometer for the coal mine comprises a base 1 and a non-magnetic rotary table 2 arranged on the base 1, wherein the non-magnetic rotary table 2 comprises a bracket 3 and a coaxial plate 4 connected with the bracket 3, and the coaxial plate 4 is used for arranging a standard probe tube and a probe tube to be calibrated;
the coaxial plate 4 can be pitched, rolled or both on the stand 3.
The pitching means that the coaxial plate 4 rotates by taking the first bracket rod 5 as an axis, and the rolling means that the coaxial plate 4 rotates by taking the second bracket rod 6 as an axis.
As one preferable example of the present embodiment:
the bracket 3 is of a T-shaped structure and comprises a first bracket rod 5 and a second bracket rod 6 which is vertically connected with the first bracket rod 5, and one end of the first bracket rod 5 is connected with the middle part of the second bracket rod 6;
the first bracket rod 5 is connected with the base 1 through a bracket connecting rod 7, and the coaxial plate 4 is connected with one end of the second bracket rod 6;
the first bracket rod 5 can rotate along the axis of the first bracket rod, and the coaxial plate 4 can rotate along the axis of the second bracket rod 6.
A plurality of grooves 8 parallel to the second bracket rod 6 are arranged on the coaxial plate 4, a probe tube fastening screw 9 and a probe tube fixing clamp 10 are also arranged on the coaxial plate 4, and the grooves 8, the probe tube fastening screw 9 and the probe tube fixing clamp 10 are used for fixing a standard probe tube and a probe tube to be calibrated together;
the coaxial plate 4 is sleeved with the second bracket rod 6, and the position is fixed through a coaxial plate fastening screw 11.
The first bracket rod 5 is sleeved with a bracket sleeve 12, the bracket sleeve 12 is fixedly connected with the bracket connecting rod 7, and the first bracket rod 5 can rotate in the bracket sleeve 12.
One end of the bracket sleeve 12 is provided with a bracket rotating handle 13, and the other end of the bracket sleeve 12 is provided with an inclination dial 14; after the bracket fastening screw 15 is loosened, the bracket rotating handle 13 is rotated, so that the bracket 3 can axially rotate 360 degrees around the bracket sleeve 12, the inclination angle of the coaxial plate 4 is changed, and the rotation angle of the inclination angle can be read through the inclination angle dial 14.
The bracket sleeve 12 is provided with a bracket fastening screw 15, and the bracket fastening screw 15 is used for fixing the relative position of the first bracket rod 5;
the other end of the first bracket rod 5 connected with the second bracket rod 6 is provided with a counterweight 16, and the other end of the second bracket rod 6 connected with the coaxial plate 4 is also provided with the counterweight 16. The counterweight 16 may be attached to a counterweight corresponding to the weight of the symmetrical ends to balance the ends. The balance weight can be adjusted along with the weight change of the symmetrical end, so that the bracket is kept from toppling.
The coaxial plate 4 is provided with a coaxial plate rotating handle 17, and the second bracket rod 6 is also provided with an angle-facing dial 18. After the coaxial plate fastening screw 11 is loosened, the coaxial plate rotating handle 17 is rotated, so that the coaxial plate 4 can axially rotate 360 degrees around the second bracket rod 6, and the facing angle of the coaxial plate 4 is changed, and the facing angle rotation angle can be read through the facing angle dial 18.
The base 1 is provided with a base horizontal adjusting screw 19.
The flow of the error correction method of the inclinometer provided by the application is shown in figure 2, and the working method comprises the following steps: the calibrated standard probe tube 22 and the probe tube 23 to be calibrated are respectively arranged on the coaxial plate 4, the coaxial plate 4 is arbitrarily rotated for a plurality of positions, and simultaneously data of triaxial magnetic sensors and acceleration sensors of the two probe tubes are acquired. After the data acquisition is completed, calculating error correction coefficients of the triaxial magnetic sensor data and the triaxial acceleration sensor data of the probe to be calibrated through a least square fitting algorithm, and downloading the coefficients into the probe to be calibrated for storage.
An error correction method of an inclinometer for a coal mine is carried out by adopting the device.
The method comprises the following steps:
step 1, adjusting a base horizontal adjusting screw 19 on a base 1 by using a level bar, adjusting the base 1 to be horizontal, fixing a standard probe and a probe to be calibrated in a groove 8 on a coaxial plate 4 by using a probe fastening screw 9 and a probe fixing clamp 10 respectively, connecting the standard probe and the probe to be calibrated with a computer through a communication cable, opening calibration software, and reading probe data in a static state;
step 2, loosening a probe fastening screw 9 on the probe to be calibrated, and rotating the probe to be calibrated to enable the initial facing angle gamma of the probe to be calibrated 0 Initial facing angle gamma with standard probe 1 The same;
step 3, rotating the nonmagnetic rotary table 2 according to the given position, and recording the triaxial magnetic sensor components H of the standard probe 3 and the probe 4 to be calibrated at each position 1 ＝[H x1 ,H y1 ,H z1 ]，H 0 ＝[H x0 ,H y0 ,H z0 ]Triaxial acceleration sensor component G 1 ＝[G x1 ,G y1 ,G z1 ]，G 0 ＝[G x0 ,G y0 ,G z0 ]；
The rotation position of the nonmagnetic turntable is given as follows:
at the position ofIn the range, the inclination angle alpha of the rotary calibration table is M times altogether, the face angle gamma is rotated for N times under each inclination angle position, N groups of triaxial data are collected, and M.N groups of data are collected altogether;
step 4, fitting the acquired data of the magnetic sensor and the acceleration sensor of the standard probe tube and the probe tube to be calibrated to obtain a magnetic sensor calibration matrix and an acceleration sensor calibration matrix;
taking a magnetic sensor as an example, the magnetic sensor of the standard probe 3 is used for collecting data H 1 ＝[H x1 ,H y1 ,H z1 ]As the triaxial magnetic component theoretical value of the probe 4 to be calibrated, and modeling the error of the probe to be calibrated, the formula is as follows:
H 1 ＝K h ·H 0 +B h (1)
h in 1 Data acquisition for a triaxial magnetic sensor of a standard probe 3Vector, H 0 Data vectors, K, are acquired for the triaxial magnetic sensor of the probe 4 to be calibrated h A 3×3 calibration coefficient matrix, B h Is a constant matrix. The coefficient matrix K can be solved by the least square method h Sum constant matrix B h Is a solution to the optimization of (3).
Similarly, the coefficient matrix K of the acceleration sensor can be obtained g And B g 。
Step 5, writing the calculated calibration matrix of the magnetic sensor and the calibration matrix of the acceleration sensor into a memory in the probe to be calibrated for storage, and calculating the inclination angle, the azimuth angle and the facing angle after calibration through formulas (1) - (3);
fig. 3 is a graph comparing data before and after calibration of a certain axis of the triaxial magnetic sensor, and fig. 4 to 6 are error curves between the inclination angle, the facing angle and the azimuth angle of the probe to be calibrated and a given theoretical angle. It can be seen that after the probe tube to be calibrated is calibrated by adopting the application, the azimuth angle error can be controlled within +/-1.5 degrees, and the inclination angle and the facing angle error can be controlled within 0.2 degrees. Therefore, the application can effectively correct errors of the probe to be calibrated, and solves the problems of poor timeliness and increased cost caused by the fact that the calibration equipment is limited and can not be recalibrated on the coal mine site.
While the application has been described with respect to the preferred embodiments, it is to be understood that the application is not limited thereto, but is intended to cover modifications and alternatives falling within the spirit and scope of the present application as disclosed by those skilled in the art without departing from the spirit and scope of the present application.
Claims (4)
1. The error correction method of the inclinometer for the coal mine is characterized by being realized by an error correction device of the inclinometer for the coal mine;
the method comprises the following steps:
step 1, adjusting a base horizontal adjusting screw (19) on a base (1) by using a horizontal ruler, adjusting the base (1) to be horizontal, fixing a standard probe and a probe to be calibrated in a groove (8) on a coaxial plate (4) by using a probe fastening screw (9) and a probe fixing clamp (10), connecting the standard probe and the probe to be calibrated with a computer through a communication cable, opening calibration software, and reading probe data in a static state;
step 2, loosening a probe fastening screw (9) on the probe to be calibrated, and rotating the probe to be calibrated to enable the initial facing angle gamma of the probe to be calibrated 0 Initial facing angle gamma with standard probe 1 The same;
step 3, rotating the nonmagnetic rotary table (2) according to the given position, and recording the triaxial magnetic sensor components H of the standard probe 3 and the probe 4 to be calibrated at each position 1 ＝[H x1 ,H y1 ,H z1 ]，H 0 ＝[H x0 ,H y0 ,H z0 ]Triaxial acceleration sensor component G 1 ＝[G x1 ,G y1 ,G z1 ]，G 0 ＝[G x0 ,G y0 ,G z0 ]；
The rotational position of the nonmagnetic turntable (2) is given as follows:
at the position ofIn the range, the inclination angle alpha of the rotary calibration table is M times altogether, the face angle gamma is rotated for N times under each inclination angle position, N groups of triaxial data are collected, and M.N groups of data are collected altogether;
step 4, fitting the acquired data of the magnetic sensor and the acceleration sensor of the standard probe tube and the probe tube to be calibrated to obtain a magnetic sensor calibration matrix and an acceleration sensor calibration matrix;
step 5, writing the calculated calibration matrix of the magnetic sensor and the calibration matrix of the acceleration sensor into a memory in the probe to be calibrated for storage, and calculating the inclination angle, the azimuth angle and the facing angle after calibration through formulas (1) - (3);
G x : the corrected acceleration sensor x-axis component;
G y : a corrected acceleration sensor y-axis component;
G z : correcting the z-axis component of the acceleration sensor;
H x : corrected magnetic sensor x-axis component;
H y : a corrected magnetic sensor y-axis component;
H z : a corrected magnetic sensor z-axis component;
the error correction device of the inclinometer for the coal mine comprises a base (1) and a non-magnetic rotary table (2) arranged on the base (1), wherein the non-magnetic rotary table (2) comprises a bracket (3) and a coaxial plate (4) connected with the bracket (3), and the coaxial plate (4) is used for arranging a standard probe tube and a probe tube to be calibrated;
the coaxial plate (4) is pitching, rolling or pitching and rolling on the bracket (3);
the bracket (3) is of a T-shaped structure and comprises a first bracket rod (5) and a second bracket rod (6) vertically connected with the first bracket rod (5), and one end of the first bracket rod (5) is connected with the middle part of the second bracket rod (6);
the first bracket rod (5) is connected with the base (1) through a bracket connecting rod (7), and the coaxial plate (4) is connected with one end of the second bracket rod (6);
the first bracket rod (5) can rotate along the axis of the first bracket rod, and the coaxial plate (4) can rotate along the axis of the second bracket rod (6);
a plurality of grooves (8) parallel to the second bracket rod (6) are arranged on the coaxial plate (4), a probe fastening screw (9) and a probe fixing clamp (10) are also arranged on the coaxial plate (4), and the grooves (8), the probe fastening screw (9) and the probe fixing clamp (10) are used for fixing a standard probe and a probe to be calibrated together;
the coaxial plate (4) is sleeved with the second bracket rod (6), and the position is fixed through a coaxial plate fastening screw (11);
the base (1) is provided with a base horizontal adjusting screw (19).
2. The error correction method of the inclinometer for the coal mine as claimed in claim 1, wherein the first bracket rod (5) is sleeved with a bracket sleeve (12), the bracket sleeve (12) is fixedly connected with the bracket connecting rod (7), and the first bracket rod (5) can rotate in the bracket sleeve (12).
3. The error correction method of the inclinometer for the coal mine according to claim 2, wherein one end of the bracket sleeve (12) is provided with a bracket rotating handle (13), and the other end of the bracket sleeve (12) is provided with an inclination dial (14);
the bracket sleeve (12) is provided with a bracket fastening screw (15), and the bracket fastening screw (15) is used for fixing the relative position of the first bracket rod (5);
the other end of the first bracket rod (5) connected with the second bracket rod (6) is provided with a counterweight (16), and the other end of the second bracket rod (6) connected with the coaxial plate (4) is also provided with the counterweight (16).
4. The error correction method of the inclinometer for the coal mine as claimed in claim 1, wherein the coaxial plate (4) is provided with a coaxial plate rotating handle (17), and the second bracket rod (6) is also provided with an angle-facing dial (18).
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| CN202111580994.5A CN114509090B (en) | 2021-12-22 | 2021-12-22 | Error correction device and method for inclinometer for coal mine |
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| CN202111580994.5A CN114509090B (en) | 2021-12-22 | 2021-12-22 | Error correction device and method for inclinometer for coal mine |
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