CN111426334A - Method and device for realizing high-precision horizontal reference leveling of working table top - Google Patents
Method and device for realizing high-precision horizontal reference leveling of working table top Download PDFInfo
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- CN111426334A CN111426334A CN202010216485.3A CN202010216485A CN111426334A CN 111426334 A CN111426334 A CN 111426334A CN 202010216485 A CN202010216485 A CN 202010216485A CN 111426334 A CN111426334 A CN 111426334A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 23
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 79
- 229910052753 mercury Inorganic materials 0.000 claims description 78
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000012937 correction Methods 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 4
- 230000007123 defense Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 229920002545 silicone oil Polymers 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005486 microgravity Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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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
- G01C25/005—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a leveling method and a leveling device for realizing high-precision horizontal reference of a working table top. The CCD double-shaft photoelectric autocollimator is arranged on the cloud deck, the photoelectric autocollimator converts an optical signal of angle deflection into an electric signal through an internal CCD device, and a display in the CCD double-shaft photoelectric autocollimator processes the signal of the CCD device in the CCD double-shaft photoelectric autocollimator and transmits a measured value to the CCD light tube electric cabinet. The invention has the advantages of effective and reliable positioning, accurate and continuous adjustment of table load, high measurement accuracy, direct satisfaction of the horizontal reference of various accelerometer reference mirrors, and the like, can meet the accurate correction of the horizontal reference of various departments such as national defense, metering, scientific research institutions, enterprise production and the like before the measurement system test, and the correction accuracy can reach +/-0.5' in a measuring range.
Description
Technical Field
The invention relates to a leveling device, in particular to a method for realizing high-precision leveling of a worktable top by using a horizontal reference before optical measurement and a leveling device thereof.
Background
In scientific research production units such as national defense, metering, scientific research institutions and enterprises, the accuracy of a tested piece is directly influenced by the level of a test platform, and the high-precision level adjustment of the test platform is particularly important.
The accelerometer, as an inertial sensor, plays an important role in the fields of inertial navigation, deep space exploration, space microgravity environment measurement and the like, and is widely applied due to the characteristics of simple structure, convenience in processing, high reliability and the like. The accelerometer is usually packaged in an instrument box, a coordinate system is established by taking a reference mirror arranged on an outer shell of the instrument box as a reference, and the geometric relation of an input shaft of the accelerometer relative to the coordinate system of the reference mirror can be obtained by calibrating the misalignment angle of the accelerometer through a four-point rolling test, so that the direction corresponding to the input shaft of the accelerometer can be known if the reference mirror is positioned in actual use. However, when considering the installation error in the four-point rolling test, the pointing direction of the normal line of the reference mirror at the initial moment can seriously affect the misalignment angle of the accelerometer, so that the horizontal adjustment of the reference mirror at the initial moment is very important in order to accurately measure the misalignment angle of the accelerometer.
The common method for adjusting the level of the reference mirror of the accelerometer assembly comprises the following steps: the theodolite is utilized for collimation, namely, the normal line of the mirror surface of the cubic mirror is used as an azimuth reference, the theodolite is used for collimating the mirror surface of the cubic mirror, the position of the base of the cubic mirror and the pointing direction of the sighting axis are adjusted, the sighting axis of the theodolite is coincided with the normal line of the mirror surface of the cubic mirror, the optical auto-collimation of the mirror surface of the cubic mirror can be realized, and the horizontal adjustment of the reference mirror can be realized through the angle values of the horizontal angle and the vertical angle of the theodolite. The existing horizontal adjustment method of the reference mirror adopts human eye aiming, and has the defects of low measurement precision, inconvenient actual operation and the like. Even if the level gauge is used as a horizontal reference, the method for carrying out collimation measurement by using the photoelectric autocollimator can solve the defects of low human eye collimation precision, inconvenient actual operation and the like to a certain extent, but the method needs to carry out reference conversion for many times and is still inconvenient to use.
Disclosure of Invention
The invention aims to provide a method for realizing high-precision horizontal reference leveling of a working table top, which can effectively and reliably position, accurately and continuously adjust the table top load and has high measurement precision.
The second purpose of the invention is to provide a leveling device which can effectively and reliably position, is convenient to use and can directly meet the accurate correction of the horizontal reference of various accelerometer reference mirrors.
The first object of the present invention is achieved by:
a method for realizing high-precision horizontal reference leveling of a working table top is characterized by comprising the following steps: the method comprises the following specific steps:
A. the CCD light tube electric box is fixed at the upper end of the rocker arm, the right end of the rocker arm is arranged on the tripod head, the position can be adjusted left and right, and the CCD double-shaft photoelectric autocollimator is fixed on the tripod head;
B. the light pipe bracket and the locking knob on the rocker arm are loosened, the vertical height adjustment of the rocker arm can be realized, the locking nut between the holder and the track of the rocker arm is loosened, the holder slides leftwards and rightwards, the holder is enabled to reach a proper image finding position, and then the locking nut is tightened to realize the height fixation of the rocker arm and the locking of the holder;
C. loosening the locking nuts between the upper and lower lifting rods and the horizontal adjusting rod, moving up and down to lock the horizontal adjusting rod to a reasonable position; the horizontal adjusting rod and the mercury pool vessel mounting bracket can both horizontally contract and are fixed after the position is aligned;
D. a CCD double-shaft photoelectric autocollimator is arranged on the holder and is positioned at a proper height and position, and a horizontal adjusting rod is also adjusted to ensure that the mercury cell assembly is positioned at a proper height and position;
E. placing an optical reference mirror on an object to be measured, and adjusting a CCD double-shaft photoelectric autocollimator and a mercury pool assembly to enable the pipe diameter circle center of a front-end light pipe in the CCD double-shaft photoelectric autocollimator, the center of the mercury pool and the object to be measured to be basically in a straight line in the vertical direction;
F. the CCD double-shaft photoelectric autocollimator is electrified, the light pipe generates a beam of downward light, the downward light is reflected by a mercury surface in the mercury pool assembly and returns to the light pipe, the pitching and left-right deflection knobs of the holder are adjusted, the CCD double-shaft photoelectric autocollimator is accurately aligned, the reflected light reaches the position that the value of a rear end display in the CCD double-shaft photoelectric autocollimator is close to an absolute position (0, 0), namely emergent light and incident light are superposed, and the light pipe of the CCD double-shaft photoelectric autocollimator is kept in a static state;
G. and then moving away from the mercury pool component, emitting light rays emitted by the light pipe into the optical reference mirror on the object to be measured below, and finally adjusting the object to be measured to ensure that the light rays returning to the light pipe are returned to the position of the display to be close to the absolute position (0, 0) again, and finishing the high-precision horizontal reference leveling of the working table surface of the object to be measured.
The second object of the invention is achieved by:
a leveling device for realizing high-precision horizontal reference of a working table comprises a rocker arm, a mercury pool vessel mounting bracket, a light pipe bracket and a heightening platform, wherein the heightening platform is arranged on the ground; the left middle part of rocking arm is established on the pivot, and mercury pool household utensils installing support comprises oscilaltion pole, leveling rod and support base, and subaerial is arranged in to the support base, and the right-hand member movable mounting of horizontally adjusting rod is in the upper end of vertical oscilaltion pole, and the characteristic is: the device comprises a rocker arm, a light pipe mounting plate, a light pipe seat, a holder, a CCD double-shaft photoelectric autocollimator, a holder, a mercury pool assembly and a CCD light pipe electric cabinet, wherein the holder is arranged at the right end of the rocker arm; the left end of the horizontal adjusting rod is provided with a mercury pool assembly located under the CCD double-shaft photoelectric auto-collimator, an object to be detected is arranged under the mercury pool assembly, and an optical reference mirror located under the mercury pool assembly is arranged on the object to be detected.
The optical reference mirror is used for reflecting incident light of the optical CCD double-shaft photoelectric autocollimator, and the parallelism of the upper surface and the lower surface of the optical reference mirror is within 0.001 mm.
The mercury pool component comprises mercury and silicon oil, a sealing ring, a protection window and a mercury pool device, wherein the mercury and the silicon oil are filled in the mercury pool device with an upward opening, and the protection window is covered on the opening of the mercury pool device through the sealing ring to form a sealed mercury pool.
And a locking nut is arranged between the holder and the rocker arm, and the holder and the rocker arm can be adjusted left and right by loosening the locking nut.
The method for realizing the high-precision horizontal reference leveling of the working table top is remarkably characterized in that two liquids of mercury and silicone oil are used as horizontal reference reflecting surfaces, the mercury is a liquid metal, after the mercury is put into a mercury tank vessel, the mercury has high specific gravity and high tension, the mercury is a natural horizontal reference under the action of gravity, particularly, after the mercury is kept still for a moment, the surface of the mercury can form a horizontal reference reflecting surface similar to a mirror surface, and the mercury forms a reflecting mirror; the layer of silicone oil on top of the mercury increases the reflectivity of the light. The mercury horizontal reference surface does not need to be adjusted and is not influenced by the ground.
The method for realizing the high-precision horizontal reference leveling of the working table top adopts the CCD double-shaft photoelectric autocollimator and the mercury pool component, and can provide a horizontal reference before optical measurement. The CCD double-shaft photoelectric autocollimator is arranged on the cloud deck, the photoelectric autocollimator converts an optical signal of angle deflection into an electric signal through an internal CCD device, and a display in the CCD double-shaft photoelectric autocollimator collects, processes, displays and stores the signal of the CCD device in the CCD double-shaft photoelectric autocollimator and transmits a measured value to the CCD light tube electric cabinet through an RS232 interface.
Therefore, the invention has the following advantages:
1. the cradle head is used for positioning, so that the working table surface of the object to be measured can be accurately adjusted;
2. a sealed mercury pool is used as a horizontal reference;
3. the measurement precision of the prepared CCD double-shaft photoelectric autocollimator can reach 0.5 ', the effective resolution reaches 0.01', the measurement range is large, the precision is high, and the effective measurement distance is long;
4. by means of all azimuth adjusting mechanisms of the mercury pool vessel mounting bracket, the holder, the rocker arm, the light pipe bracket and the elevating platform, the height adjustment and 360-degree direction rotation of the light pipe in the CCD double-shaft photoelectric autocollimator, the height adjustment of the mercury pool serving as a horizontal standard, 360-degree direction rotation and horizontal shrinkage functions can be realized, and effective positioning can be realized;
5. the high-precision horizontal reference leveling method is simple and easy to implement, has low requirements on parts and machining precision, and is low in cost.
The invention can meet the accurate correction of the horizontal reference of various departments such as national defense, metering, scientific research institutions, enterprise production and the like before the measurement system test, and the correction accuracy can reach +/-0.5' in the range of measurement.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a mercury cell assembly.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the following examples and drawings.
A method for realizing high-precision horizontal reference leveling of a working table top comprises the following specific steps:
A. the CCD light tube electric box 201 is fixed at the upper end of the rocker arm 103 by the stabilizing padding high platform 101 and the light tube bracket 102, the right end of the rocker arm 103 is arranged on the cloud platform 104, the position can be adjusted left and right, and the CCD double-shaft photoelectric autocollimator 202 is fixed on the cloud platform 104;
B. the light pipe bracket 102 and the locking knob 106 on the rocker arm 103 are loosened, the vertical height adjustment of the rocker arm 103 can be realized, the locking nut 108 between the track of the holder 104 and the track of the rocker arm 103 (the inner part is provided with the holder 104) is loosened, the holder 104 slides leftwards and rightwards, the holder 104 is enabled to be in a proper image finding position, and then the locking nut 108 is screwed down to realize the height fixation of the rocker arm 103 and the locking of the holder 104;
C. loosening a locking nut 404 between the upper and lower lifting rods 402 and the horizontal adjusting rod 401, moving up and down to lock the horizontal adjusting rod 401 to a reasonable position; the horizontal adjusting rod 401 and the mercury pool vessel mounting bracket 4 can both horizontally contract and are fixed after the position is aligned;
D. the cloud deck 104 is provided with the CCD double-shaft photoelectric autocollimator 202, the CCD double-shaft photoelectric autocollimator 202 is in a proper height and position, and the horizontal adjusting rod 401 is also adjusted to enable the mercury pool assembly 3 to be in a proper height and position;
E. placing an optical reference mirror 501 on an object to be measured 5, and adjusting the CCD double-shaft photoelectric autocollimator 202 and the mercury pool assembly 3 to ensure that the pipe diameter circle center of a front end light pipe in the CCD double-shaft photoelectric autocollimator 202, the center of the mercury pool 304 and the object to be measured 5 are basically in a straight line in the vertical direction;
F. the CCD double-shaft photoelectric autocollimator 202 is electrified, the light pipe generates a beam of downward light, the downward light is reflected by a mercury surface in the mercury pool assembly 3 and returns to the light pipe, the pitching and left-right deflection knobs of the holder 104 are adjusted, the CCD double-shaft photoelectric autocollimator 202 is accurately aligned, the reflected light reaches the condition that the value of a rear-end display in the CCD double-shaft photoelectric autocollimator 202 is near the absolute position (0, 0), namely emergent light and incident light are superposed, and the light pipe of the CCD double-shaft photoelectric autocollimator is kept in a static state;
G. and then moving away from the mercury pool component 3, emitting light rays emitted by the light pipe into the optical reference mirror 501 on the object to be measured 5 below, and finally adjusting the object to be measured 5, so that the light rays returning to the light pipe are returned to the position close to the absolute position (0, 0) of the display again, and the high-precision horizontal reference leveling of the working table top of the object to be measured 5 is finished.
A leveling device for realizing high-precision horizontal reference of a working table comprises a rocker arm 103, a mercury reservoir vessel mounting bracket 5, a light pipe bracket 102 and a heightening table 101, wherein the heightening table 101 is arranged on the ground, the lower end of the light pipe bracket 102 is fixed on the heightening table 101, a rotating shaft 105 with a locking knob 106 is arranged on the light pipe bracket 102, and the lifting height of a cloud deck 104 can be adjusted by loosening the locking knob 106 on the side wall of the light pipe bracket 102; the left middle part of rocking arm 103 is established on pivot 105, and mercury cell household utensils installing support 4 comprises oscilaltion pole 402, leveling rod 401 and support base 403, and subaerial is arranged in to support base 403, and the right-hand member movable mounting of leveling rod 401 is in the upper end of vertical oscilaltion pole 401, and the characteristic is: the device comprises a rocker arm 103, a CCD double-shaft photoelectric autocollimator 202, a holder 104, a mercury pool component 3 and a CCD light tube electric cabinet 201, wherein the holder 104 is arranged at the right end of the rocker arm 103, the upper end of the CCD double-shaft photoelectric autocollimator 202 is arranged on a table surface 107 of the holder 104, the lower end of the CCD double-shaft photoelectric autocollimator 202 extends downwards out of the holder 104, and the CCD double-shaft photoelectric autocollimator 202 and the holder 104 are respectively connected with the CCD light tube electric cabinet 201 arranged on the rocker arm 103 through wires; the left end of the horizontal adjusting rod 401 is provided with a mercury pool component 3 which is positioned right below the CCD double-shaft photoelectric auto-collimator 202, an object to be measured 5 is arranged below the mercury pool component 3, and an optical reference mirror 501 which is positioned right below the mercury pool component 3 is arranged above the object to be measured 5.
The optical reference mirror 501 is used for reflecting incident light of the optical CCD biaxial photoelectric autocollimator 202, and the parallelism of the upper and lower surfaces of the optical reference mirror 501 is within 0.001 mm.
The mercury reservoir unit 3 includes silicone oil 301 and mercury 302, a seal ring 303, a mercury reservoir cover 305, a lens 306, and a mercury reservoir 304, the silicone oil 301 and the mercury 302 are contained in the mercury reservoir 304 having an upward opening, the lens 306 is attached to the mercury reservoir cover 305, and the mercury reservoir cover 305 covers the opening of the mercury reservoir 304 through the seal ring 302 to form a sealed mercury reservoir.
A lock nut 108 is arranged between the pan-tilt 104 and the rocker arm 103, and the pan-tilt 104 and the rocker arm 103 can be adjusted left and right by loosening the lock nut 108.
Claims (5)
1. A method for realizing high-precision horizontal reference leveling of a working table top is characterized by comprising the following steps: the method comprises the following specific steps:
A. the CCD light tube electric box is fixed at the upper end of the rocker arm, the right end of the rocker arm is arranged on the tripod head, the position can be adjusted left and right, and the CCD double-shaft photoelectric autocollimator is fixed on the tripod head;
B. the light pipe bracket and the locking knob on the rocker arm are loosened, the vertical height adjustment of the rocker arm can be realized, the locking nut between the holder and the track of the rocker arm is loosened, the holder slides leftwards and rightwards, the holder is enabled to reach a proper image finding position, and then the locking nut is tightened to realize the height fixation of the rocker arm and the locking of the holder;
C. loosening the locking nuts between the upper and lower lifting rods and the horizontal adjusting rod, moving up and down to lock the horizontal adjusting rod to a reasonable position; the horizontal adjusting rod and the mercury pool vessel mounting bracket can both horizontally contract and are fixed after the position is aligned;
D. a CCD double-shaft photoelectric autocollimator is arranged on the holder and is positioned at a proper height and position, and a horizontal adjusting rod is also adjusted to ensure that the mercury cell assembly is positioned at a proper height and position;
E. placing an optical reference mirror on an object to be measured, and adjusting a CCD double-shaft photoelectric autocollimator and a mercury pool assembly to enable the pipe diameter circle center of a front-end light pipe in the CCD double-shaft photoelectric autocollimator, the center of the mercury pool and the object to be measured to be basically in a straight line in the vertical direction;
F. the CCD double-shaft photoelectric autocollimator is electrified, the light pipe generates a beam of downward light, the downward light is reflected by a mercury surface in the mercury pool assembly and returns to the light pipe, the pitching and left-right deflection knobs of the holder are adjusted, the CCD double-shaft photoelectric autocollimator is accurately aligned, the reflected light reaches the position that the value of a rear end display in the CCD double-shaft photoelectric autocollimator is close to an absolute position (0, 0), namely emergent light and incident light are superposed, and the light pipe of the CCD double-shaft photoelectric autocollimator is kept in a static state;
G. and then moving away from the mercury pool component, emitting light rays emitted by the light pipe into the optical reference mirror on the object to be measured below, and finally adjusting the object to be measured to ensure that the light rays returning to the light pipe are returned to the position of the display to be close to the absolute position (0, 0) again, and finishing the high-precision horizontal reference leveling of the working table surface of the object to be measured.
2. A leveling device for realizing high-precision horizontal reference of a working table comprises a rocker arm, a mercury pool vessel mounting bracket, a light pipe bracket and a heightening platform, wherein the heightening platform is arranged on the ground; the left middle part of rocking arm is established on the pivot, and mercury pool household utensils installing support comprises oscilaltion pole, leveling rod and support base, and subaerial is arranged in to the support base, and the right-hand member movable mounting of horizontally adjusting rod is in the upper end of vertical oscilaltion pole, its characterized in that: the device comprises a rocker arm, a light pipe mounting plate, a light pipe seat, a holder, a CCD double-shaft photoelectric autocollimator, a holder, a mercury pool assembly and a CCD light pipe electric cabinet, wherein the holder is arranged at the right end of the rocker arm; the left end of the horizontal adjusting rod is provided with a mercury pool assembly located under the CCD double-shaft photoelectric auto-collimator, an object to be detected is arranged under the mercury pool assembly, and an optical reference mirror located under the mercury pool assembly is arranged on the object to be detected.
3. The device for realizing high-precision horizontal reference leveling of the working table top as claimed in claim 2, wherein: the optical reference mirror is used for reflecting incident light of the optical CCD double-shaft photoelectric autocollimator, and the parallelism of the upper surface and the lower surface of the optical reference mirror is within 0.001 mm.
4. The device for realizing high-precision horizontal reference leveling of the working table top as claimed in claim 2, wherein: the mercury pool component comprises mercury and silicon oil, a sealing ring, a protection window and a mercury pool device, wherein the mercury and the silicon oil are filled in the mercury pool device with an upward opening, and the protection window is covered on the opening of the mercury pool device through the sealing ring to form a sealed mercury pool.
5. The device for realizing high-precision horizontal reference leveling of the working table top as claimed in claim 2, wherein: and a locking nut is arranged between the holder and the rocker arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010216485.3A CN111426334A (en) | 2020-03-25 | 2020-03-25 | Method and device for realizing high-precision horizontal reference leveling of working table top |
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| CN202010216485.3A CN111426334A (en) | 2020-03-25 | 2020-03-25 | Method and device for realizing high-precision horizontal reference leveling of working table top |
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| CN108253949A (en) * | 2017-12-30 | 2018-07-06 | 西安邮电大学 | A kind of high level Super High squareness measurement controller |
| CN108871299A (en) * | 2018-06-28 | 2018-11-23 | 中国船舶重工集团公司第七0七研究所 | A kind of plumb datum reflector apparatus |
| CN109540098A (en) * | 2018-11-22 | 2019-03-29 | 北京航天计量测试技术研究所 | A kind of non-contacting inertial platform levelness measuring device and method |
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Application publication date: 20200717 |