CN106959122B - High-precision calibration device and calibration method for level bar - Google Patents
High-precision calibration device and calibration method for level bar Download PDFInfo
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- CN106959122B CN106959122B CN201710313220.3A CN201710313220A CN106959122B CN 106959122 B CN106959122 B CN 106959122B CN 201710313220 A CN201710313220 A CN 201710313220A CN 106959122 B CN106959122 B CN 106959122B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000000903 blocking effect Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
- G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
- G01C9/34—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble of the tubular type, i.e. for indicating the level in one direction only
Abstract
The invention discloses a high-precision calibrating device for a level, which comprises a base, wherein a leveling supporting leg is arranged at the bottom of the base, a stepping motor and a rotating shaft support are fixed on the base, a rotating shaft of the stepping motor is positioned in the rotating shaft support and is rotationally connected with the rotating shaft support, a calibrating platform is fixed at the front end of the rotating shaft, a horizontal column for leveling is arranged on the calibrating platform, a horizontal chute is arranged on the calibrating platform, a left stop seat and a right stop seat are glidingly connected in the horizontal chute, and standard line graduations for calibrating indication errors of a level line ruler are arranged on the base; the leveling rule zero error calibration method and the leveling rule graduation value bit error calibration method are carried out by using the device. The horizontal scales with different lengths and different specifications are calibrated through the left and right movement of the left gear seat and the right gear seat, so that the practicability is higher; therefore, the high-precision calibration device and the calibration method for the level bar are simple to operate, high in calibration efficiency and capable of achieving quick batch calibration.
Description
Technical Field
The invention belongs to the technical field of level calibration, and particularly relates to a high-precision level calibration device and a high-precision level calibration method.
Background
The level gauge is a measuring instrument which uses the principle of liquid level and uses the bubble to directly display angular displacement to measure the deviation degree of the measured surface relative to horizontal position, vertical position and inclined position. The state promulgates a 'JJF 1085-2002 level calibration standard' in 2002, and makes calibration regulations on the flatness of the working surface of the level, the indication error, zero error, graduation value error and the like of the line ruler, so as to ensure the quality of the level in the manufacturing and using processes.
At present, the calibration of each parameter of the level mainly adopts an adjustable flat plate, a special plane parallel column, a special 45-degree angle square, a special calibration table, a gauge block and a dial indicator, and is manually operated, so that the operation is complicated, the operation error is large, and the calibration is particularly inconvenient in the batch calibration process. The Chinese patent with publication number 103528597A discloses a leveling rule calibrating method and a leveling rule calibrating device, wherein an optical dividing head and a clamp are adopted as a calibrator, and calibration of zero errors and dividing value errors of horizontal position bubbles, vertical position bubbles and 45-degree position bubbles of the leveling rule can be completed through one-time clamping, so that the leveling rule has certain progress, but the operation steps are complicated, and the precision of the optical dividing head and the clamp is not high enough. The Chinese patent with the bulletin number of 205642396U discloses a high-precision level calibrating device based on sine theorem, which integrates the precision calibration work of a horizontal position, a 90-degree position and a 45-degree position, a line ruler indication value and an indexing value on one set of equipment, but the service time of a positioning rod and a positioning plate is prolonged, errors exist, the practicability of the device is reduced, the device can only calibrate a level with a fixed length, and the operation steps of the positioning rod and the positioning plate are complex to operate back and forth in the calibration process.
Disclosure of Invention
The aim of the invention is to provide a high-precision calibration device and a calibration method for a level bar, which have simple operation steps and compact structure, for solving the problems in the prior art; the technical scheme adopted by the invention for solving the problems is as follows: the high-precision calibration device for the level ruler comprises a base, wherein a leveling supporting leg is arranged at the bottom of the base, and is characterized in that a stepping motor and a rotating shaft support are fixed on the base, a rotating shaft of the stepping motor is positioned in the rotating shaft support and is rotationally connected with the rotating shaft support, a calibration platform is fixed at the front end of the rotating shaft, a horizontal column for leveling is arranged on the calibration platform, a horizontal chute is arranged on the calibration platform, a left blocking seat and a right blocking seat are slidably connected in the horizontal chute, and standard line marks for calibrating indication value errors of the line ruler of the level ruler are arranged on the base and are arranged in the left-right direction and in front of the horizontal chute; the base is fixedly provided with a high-precision angle sensor for detecting the rotation angle of the rotating shaft, and the high-precision angle sensor and the stepping motor form a closed-loop control mechanism so that the calibration platform forms a plurality of standard dip angles.
Preferably, the left baffle seat comprises a horizontal section and a L-shaped base of a vertical section, a through hole arranged along the vertical direction is arranged on the horizontal section, a screw rod is arranged in the through hole, the bottom end of the screw rod is connected with a sliding block, and the sliding block is positioned in the horizontal sliding groove and is in sliding connection with the horizontal sliding groove; the screw is provided with a nut for fixing the base; the right baffle seat and the left baffle seat are bilaterally symmetrical.
Preferably, the horizontal sliding groove is a dovetail groove, and the sliding block is a dovetail sliding bar matched with the horizontal sliding groove.
Preferably, the rotating shaft is located at the middle position of the calibration platform.
The zero error calibration method of the leveling rule by using the leveling rule high-precision calibration device comprises the following steps:
firstly, placing a level on a calibration platform, then aligning a zero scale value of a level line ruler with one scale value of a standard line ruler, and moving a left blocking seat and a right blocking seat to clamp and fix the level ruler so as to calibrate the error of the level ruler line ruler;
finally, the rotation angle of the rotating shaft of the stepping motor is precisely controlled through the closed-loop control mechanism, so that the calibration platform is positioned at different standard inclination angles, and the horizontal position zero error calibration, the 45-degree position zero error calibration or the 90-degree position zero error calibration is performed according to the standard inclination angles of the calibration platform.
Preferably, the horizontal position zero error calibration specifically includes the following steps:
the rotating angle of the rotating shaft of the stepping motor is accurately controlled through a closed-loop control mechanism until the bubble in the horizontal column on the calibration platform is stabilized at the central position, and then the reading a of one end of the bubble in the horizontal column on the level bar is read 1 The method comprises the steps of carrying out a first treatment on the surface of the Releasing the left baffle seat and the right baffle seat to horizontally adjust the level bar by 180 degrees, fixing the level bar in the same way, and recording the reading a at the other end of the level bubble according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
Preferably, the 45 ° position zero error calibration specifically includes the following steps:
the rotating angle of the rotating shaft of the stepping motor is accurately controlled through the closed-loop control mechanism until the level bubble in the horizontal column on the calibration platform is stabilized at the central position, the rotating shaft of the stepping motor is controlled to continuously rotate 45 degrees on the basis, and then the reading b of one end of the level bubble in the inclined column on the level is read 1 The method comprises the steps of carrying out a first treatment on the surface of the Releasing the left baffle seat and the right baffle seat to horizontally adjust the level bar by 180 degrees, fixing the level bar in the same way, and recording the reading b at the other end of the level bubble according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
Preferably, the 90 ° position zero error calibration specifically includes the following steps:
by closed loopThe control mechanism precisely controls the rotation angle of the rotating shaft of the stepping motor until the level bubble in the horizontal column on the calibration platform is stabilized at the central position, the rotating shaft of the stepping motor is controlled to continuously rotate by 90 degrees on the basis, and then the reading c of one end of the level bubble in the vertical column on the level bar is read 1 The method comprises the steps of carrying out a first treatment on the surface of the Releasing the left baffle seat and the right baffle seat to horizontally adjust the level bar by 180 degrees, fixing the level bar in the same way, and recording the reading c at the other end of the level bubble according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
The level scale indexing value position error calibration method by using the level scale high-precision calibration device comprises the following steps:
placing the level on a calibration platform, moving a left baffle seat and a right baffle seat to fix the level, accurately controlling the rotation angle of a rotating shaft of a stepping motor through a closed-loop control mechanism to enable a quasi-bubble in a horizontal column on the level to be aligned with a left or right starting line, accurately controlling the rotation angle of the rotating shaft of the stepping motor through the closed-loop control mechanism, changing the inclination angle of the calibration platform each time when the variable is the nominal indexing value of the level, and reading d at one end of the level after the quasi-bubble in the horizontal column is stable 1 ,d 2 ,d 3 ,…，d n ；
The other side of the horizontal column level bubble is calibrated in the same way, and finally the formula delta b=1- (b) i -b i-1 ) Calculating an index value error, wherein: Δb is the index value error of the level, in cells; b i ,b i-1 Is the reading of the level in cells.
The invention has the beneficial effects that: the closed-loop control mechanism formed by the high-precision angle sensor and the stepping motor is matched with the horizontal column on the calibration platform, so that the calibration platform can be controlled to form a plurality of standard dip angles, the calibration precision is improved, and the calibration precision is improved, so that the calibration of the indication value error of the line ruler of the level ruler, the zero error calibration of the horizontal position of the level ruler, the zero error calibration of the position of 45 degrees or the calibration of the zero error of the position of 90 degrees and the calibration of the indexing value error are avoided, the random error caused by manual operation is avoided, and the calibration precision and the calibration accuracy are improved; on the other hand, the left and right movement of the left baffle seat and the right baffle seat realizes the calibration of the level bars with different lengths and different specifications, and the practicability is higher; therefore, the high-precision calibration device and the calibration method for the level bar are simple to operate, high in calibration efficiency and capable of achieving quick batch calibration.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a first view of the usage status of the present invention;
FIG. 5 is a second state diagram of the present invention;
FIG. 6 is a third view of the usage status of the present invention;
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, a high-precision calibration device for a level ruler comprises a base 6, wherein a leveling supporting leg 7 is arranged at the bottom of the base 6, a stepping motor 1 and a rotating shaft support 3 are fixed on the base 6, a rotating shaft 2 of the stepping motor 1 is positioned in the rotating shaft support 3 and is rotationally connected with the rotating shaft support 3, a calibration platform 5 is fixed at the front end of the rotating shaft 2, the rotating shaft 2 is positioned in the middle of the calibration platform 5, a horizontal column 9 for leveling is arranged on the calibration platform 5, a horizontal chute 4 is arranged on the calibration platform 5, the horizontal chute 4 is a dovetail groove, a left baffle seat 8 and a right baffle seat are connected in the horizontal chute 4 in a sliding manner, a standard line scale 17 for calibrating the indication error of a level ruler line scale 18 is arranged on the base 6, and the standard line scale 17 is arranged in the left-right direction and is positioned in front of the horizontal chute 4; a high-precision angle sensor for detecting the rotation angle of the rotating shaft 2 is fixed on the base 6, and forms a closed-loop control mechanism with the stepping motor 1 to enable the calibration platform 5 to form a plurality of standard inclination angles.
The left baffle seat 8 comprises a horizontal section and a vertical section, wherein the horizontal section is provided with a through hole arranged along the vertical direction, a screw rod 11 is arranged in the through hole, the bottom end of the screw rod 11 is connected with a sliding block, the sliding block is a dovetail sliding strip matched with the horizontal sliding groove 4, and the sliding block is positioned in the horizontal sliding groove 4 and is in sliding connection with the horizontal sliding groove 4; the screw 11 is provided with a nut 12 for fixing the base 10; the right blocking seat and the left blocking seat are bilaterally symmetrical and are not repeated.
A level zero error calibration method using the calibration device comprises the following steps:
firstly, placing the level 14 on a calibration platform 5, then aligning the zero scale value of the level line ruler 18 with one scale value of the standard line ruler 17, and moving the left baffle seat 8 and the right baffle seat to clamp and fix the level 14 so as to calibrate the indication error of the level line ruler 18;
the rotating angle of the rotating shaft 2 of the stepping motor is precisely controlled through the closed-loop control mechanism, so that the calibration platform 5 is located at different standard inclination angles, then a horizontal 14 ruler is placed on the calibration platform 5, the left baffle seat 8 and the right baffle seat are moved to clamp and fix the horizontal ruler 14, and finally, the horizontal position zero error calibration, the 45-degree position zero error calibration or the 90-degree position zero error calibration are carried out according to the standard inclination angles of the calibration platform 5.
As shown in fig. 4, the calibration of the horizontal position zero error specifically includes the following steps:
the rotating angle of the rotating shaft 2 of the stepping motor is precisely controlled through a closed-loop control mechanism until the bubble in the horizontal column 9 on the calibration platform 5 is stabilized at the central position, then the level bar 14 is placed on the calibration platform 5, the left blocking seat 8 and the right blocking seat are moved to fix the level bar 14, and the reading a of one end of the bubble in the horizontal column 15 on the level bar 14 is read 1 Then the left baffle seat 8 and the right baffle seat are released to horizontally adjust the level bar by 180 degrees, the level bar 14 is fixed in the same way, and the reading a of the other end of the level bubble is recorded according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
As shown in fig. 5, the 45 ° position zero error calibration specifically includes the following steps:
the rotation angle of the rotating shaft 2 of the stepping motor is precisely controlled by a closed-loop control mechanism until the level bubble in the horizontal column 9 on the calibration platform 5 is stableIn the center position, the rotating shaft 2 of the stepping motor is controlled to rotate for 45 degrees continuously on the basis, then the level bar 14 is placed on the calibration platform 5, the left blocking seat 8 and the right blocking seat are moved to fix the level bar 14, and the reading b of one end of the level bubble in the inclined column 16 on the level bar 14 is read 1 Then the left baffle seat 8 and the right baffle seat are released to horizontally adjust the level bar by 180 degrees, the level bar 14 is fixed in the same way, and the reading b at the other end of the level bubble is recorded according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
As shown in fig. 6, the calibration of the 90 ° position zero error specifically includes the following steps:
the rotating angle of the rotating shaft 2 of the stepping motor is precisely controlled through a closed-loop control mechanism until the bubble in the horizontal column 9 on the calibration platform 5 is stabilized at the central position, then the rotating shaft 2 of the stepping motor is controlled to continuously rotate 90 DEG on the basis, then the level bar 14 is placed on the calibration platform 5, the left blocking seat 8 and the right blocking seat are moved to fix the level bar 14, and the reading c of one end of the bubble in the vertical column 13 on the level bar 24 is read 1 Then the left baffle seat 8 and the right baffle seat are released to horizontally adjust the level bar by 180 degrees, the level bar 14 is fixed in the same way, and the reading c at the other end of the level bubble is recorded according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
The level scale indexing value position error calibration method by using the calibration device comprises the following steps:
placing the level 14 on the calibration platform 5, moving the left baffle seat 8 and the right baffle seat to fix the level 14, accurately controlling the rotation angle of the rotating shaft 2 of the stepping motor through a closed-loop control mechanism to enable the bubble in the horizontal column 15 on the level 14 to be aligned with the left or right starting line, accurately controlling the rotation angle of the rotating shaft 2 of the stepping motor through the closed-loop control mechanism, wherein each time the variable is the nominal indexing value of the level 41, changing the inclination angle of the calibration platform 5, and reading d at one end of the bubble after the bubble in the horizontal column 15 is stable 1 ,d 2 ,d 3 ,…，d n ；
To be the same asThe sample method aligns the other side of the vial in the horizontal column 15 and finally calculates the equation Δb=1- (b) i -b i-1 ) Calculating an index value error, wherein: Δb is the index error of level 14 in cells; b i ,b i-1 Is a reading of level 41 in cells.
The closed-loop control mechanism formed by the high-precision angle sensor and the stepping motor 1 is matched with the horizontal column 9 on the calibration platform 5, so that the calibration platform 5 can be controlled to form a plurality of standard dip angles, and the calibration precision and accuracy are improved by calibrating the indication value error of the line ruler of the level ruler, the zero error of the horizontal position of the level ruler 14, the zero error of the position of 45 degrees or the zero error of the position of 90 degrees and the calibration of the graduation value error; on the other hand, the horizontal scales 14 with different lengths and different specifications are calibrated through the left and right movement of the left baffle seat 8 and the right baffle seat, so that the practicability is higher; therefore, the high-precision calibration device and the calibration method for the level bar are simple to operate, high in calibration efficiency and capable of achieving quick batch calibration.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The zero error calibration method of the level rule by using the high-precision calibration device of the level rule is characterized by comprising the following steps of:
firstly, placing a level on a calibration platform, then aligning a zero scale value of a level line ruler with one scale value of a standard line ruler, and moving a left blocking seat and a right blocking seat to clamp and fix the level ruler so as to calibrate the error of the level ruler line ruler;
finally, the rotation angle of the rotating shaft of the stepping motor is precisely controlled through the closed-loop control mechanism, so that the calibration platform is positioned at different standard inclination angles, and horizontal position zero error calibration, 45-degree position zero error calibration or 90-degree position zero error calibration is performed according to the standard inclination angles of the calibration platform;
the high-precision calibration device for the level ruler comprises a base, wherein a leveling supporting leg is arranged at the bottom of the base, a stepping motor and a rotating shaft support are fixed on the base, a rotating shaft of the stepping motor is positioned in the rotating shaft support and is rotationally connected with the rotating shaft support, a calibration platform is fixed at the front end of the rotating shaft, a horizontal column for leveling is arranged on the calibration platform, a horizontal chute is arranged on the calibration platform, a left blocking seat and a right blocking seat are slidably connected in the horizontal chute, a standard line scale for calibrating the indication value error of the line ruler of the level ruler is arranged on the base, and the standard line scale is arranged in the left-right direction and is positioned in front of the horizontal chute; the high-precision angle sensor for detecting the rotation angle of the rotating shaft is fixed on the base, and the high-precision angle sensor and the stepping motor form a closed-loop control mechanism so that the calibration platform forms a plurality of standard dip angles;
the left baffle seat comprises a horizontal section and a vertical section, wherein the horizontal section is provided with a through hole arranged along the vertical direction, a screw rod is arranged in the through hole, the bottom end of the screw rod is connected with a sliding block, and the sliding block is positioned in the horizontal sliding groove and is in sliding connection with the horizontal sliding groove; the screw is provided with a nut for fixing the base; the right baffle seat and the left baffle seat are bilaterally symmetrical;
the sliding block is a dovetail sliding bar matched with the horizontal sliding groove; the rotating shaft is positioned at the middle position of the calibration platform.
2. The method for calibrating zero errors of a level bar according to claim 1, wherein the calibrating zero errors of the level bar specifically comprises the following steps:
the rotating angle of the rotating shaft of the stepping motor is accurately controlled through a closed-loop control mechanism until the bubble in the horizontal column on the calibration platform is stabilized at the central position, and then the water feeding of the level bar is readReading a of one end of quasi-bubble in flat column 1 The method comprises the steps of carrying out a first treatment on the surface of the Releasing the left baffle seat and the right baffle seat to horizontally adjust the level bar by 180 degrees, fixing the level bar in the same way, and recording the reading a at the other end of the level bubble according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
3. The method for calibrating zero errors of a level according to claim 1, wherein the calibrating zero errors of 45 ° positions comprises the following steps:
the rotating angle of the rotating shaft of the stepping motor is accurately controlled through the closed-loop control mechanism until the level bubble in the horizontal column on the calibration platform is stabilized at the central position, the rotating shaft of the stepping motor is controlled to continuously rotate 45 degrees on the basis, and then the reading b of one end of the level bubble in the inclined column on the level is read 1 The method comprises the steps of carrying out a first treatment on the surface of the Releasing the left baffle seat and the right baffle seat to horizontally adjust the level bar by 180 degrees, fixing the level bar in the same way, and recording the reading b at the other end of the level bubble according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
4. The method for calibrating zero errors of a level according to claim 1, wherein the calibrating zero errors of the 90 ° position specifically comprises the following steps:
the rotating angle of the rotating shaft of the stepping motor is accurately controlled through the closed-loop control mechanism until the level bubble in the horizontal column on the calibration platform is stabilized at the central position, the rotating shaft of the stepping motor is controlled to continuously rotate by 90 degrees on the basis, and then the reading c of one end of the level bubble in the vertical column on the level is read 1 The method comprises the steps of carrying out a first treatment on the surface of the Releasing the left baffle seat and the right baffle seat to horizontally adjust the level bar by 180 degrees, fixing the level bar in the same way, and recording the reading c at the other end of the level bubble according to one side of the first reading 2 Half of the difference value of the two readings is the zero error of the horizontal position.
5. A level indexing value position error calibration method using the level high precision calibration apparatus according to claim 1, comprising the steps of:
placing the level on a calibration platform, moving a left baffle seat and a right baffle seat to fix the level, accurately controlling the rotation angle of a rotating shaft of a stepping motor through a closed-loop control mechanism to enable a quasi-bubble in a horizontal column on the level to be aligned with a left or right starting line, accurately controlling the rotation angle of the rotating shaft of the stepping motor through the closed-loop control mechanism, changing the rotation angle each time to be the nominal indexing value of the level, changing the inclination angle of the calibration platform each time, and reading d at one end of the level after the quasi-bubble in the horizontal column is stable 1 ,d 2 ,d 3 ,…，d n ；
The other side of the horizontal column level bubble is calibrated in the same way, and finally the formula delta b=1- (b) i -b i-1 ) Calculating an index value error, wherein: Δb is the index value error of the level, in cells; b i ,b i-1 Is the reading of the level in cells.
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| CN107462263B (en) * | 2017-08-30 | 2023-06-27 | 东莞欧达电子有限公司 | Test structure of level bubble assembly |
| CN108051575B (en) * | 2017-11-03 | 2020-02-14 | 无锡艾科瑞思产品设计与研究有限公司 | Biological detection instrument |
| CN108489516B (en) * | 2018-06-26 | 2023-08-11 | 郑州市质量技术监督检验测试中心 | Integrated calibration device and method for image type laser graticule |
| CN110926294B (en) * | 2019-11-15 | 2022-05-20 | 安徽普源分离机械制造有限公司 | Height gauge calibrating device |
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