CN112033303B - Device for measuring roundness and straightness of deep hole - Google Patents
Device for measuring roundness and straightness of deep hole Download PDFInfo
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- CN112033303B CN112033303B CN202011072284.7A CN202011072284A CN112033303B CN 112033303 B CN112033303 B CN 112033303B CN 202011072284 A CN202011072284 A CN 202011072284A CN 112033303 B CN112033303 B CN 112033303B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2408—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring roundness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention relates to a device for measuring the roundness and the straightness of a deep hole, which comprises a fixed cylinder, a connecting shaft, a laser displacement sensor, a two-dimensional position sensitive sensor, an inclination angle sensor, a driving motor and a motor supporting block, wherein the axis position of the fixed cylinder is provided with a first through hole; the driving motor is fixedly connected to the motor supporting block in the first through hole; the device solves the problem of low measurement precision of a measuring device in the prior art, keeps the measuring device coaxial with a deep hole part, reduces vibration interference in the measuring process, and further improves the measurement precision of the roundness and the straightness of the deep hole.
Description
Technical Field
The invention relates to the technical field of deep hole detection, in particular to a device for measuring the roundness and the straightness of a deep hole.
Background
Machine manufacturing generally refers to internal bores having a length to diameter ratio in excess of 10 as deep bores. The deep hole machining is complex and special, except for special requirements on a cutter and a machining mode, the deep hole parts often have the phenomena of poor hole axis linearity, poor inner surface machining quality and the like due to the problems of difficult observation of the states of a machining part and the cutter, difficult chip removal, difficult cooling liquid conveying and the like, so the linearity and the roundness of the deep hole parts are very important to the quality of products.
Chinese patent document CN110160462A discloses a method for detecting roundness and straightness in the boring process of a large-sized deep-hole part, which comprises the steps of firstly constructing a system for detecting roundness and straightness of the large-sized deep-hole part, dividing laser emitted by a laser displacement sensor into two beams of light through a reflecting prism, returning one beam of light to the laser displacement sensor along an original optical path, irradiating the other beam of light on a position sensitive detector through a spectroscope, transmitting acquired information to a data acquisition card by the laser displacement sensor and the position sensitive detector in real time, and finally evaluating the detected roundness and straightness errors in an error evaluation module through the processing of a data storage module and a preprocessing module. In the method, the roundness and straightness evaluation system is fixed on the cutter bar, and in the operation process of the cutter bar, the end part is suspended, so that vibration can be generated in the rotation process of the cutter bar, the measurement result is influenced, and the measurement precision is reduced.
Chinese patent document CN110160464A discloses a device for measuring the cylindricity of an inner hole and a use method thereof, when the device for measuring the cylindricity of the inner hole is used for detecting the inner hole of a workpiece to be measured, a first detection rod, a second detection rod and a third detection rod are used for detecting different measuring sections to obtain measurement values and calculate the roundness error of the inner hole to be measured on the measuring sections, the straightness error of the central line of the inner hole to be measured is calculated according to the measurement values of the first detection rod, the second detection rod, the third detection rod and an inclination angle sensor at each measuring section, and the cylindricity error of the inner hole to be measured can be calculated according to the roundness error on each measuring section and the straightness error of the central line of the inner hole to be measured. In the device, a detection rod is fixed in a suspension manner in a hole to be measured, and when the hole depth is larger, the corresponding detection rod needs to be lengthened, and the longer the detection rod is, the more serious the detection rod shakes in the measurement process, so that the measurement result is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention discloses a device for measuring the roundness and the straightness of a deep hole, which solves the problem of low measurement precision of the measuring device in the prior art, keeps the measuring device coaxial with a deep hole part, reduces vibration interference in the measuring process and further improves the measurement precision of the roundness and the straightness of the deep hole.
The roundness measurement principle is that a laser displacement sensor is used for measuring the section of a certain deep hole, and the relative coordinate of the profile of the measured section under a relative coordinate system can be obtained. After coordinate transformation, the actual coordinate in the absolute coordinate system can be converted to obtain the actual coordinate of the measured section profile. The roundness error can be obtained by a conventional roundness estimation method such as a minimum area method and a least square circle method.
The straightness measurement principle is that a least square method is utilized to fit relative coordinates of a measurement interface profile to obtain a fitting circle, the circle center of the fitting circle is regarded as the circle center of the measured deep hole section, the coordinate of the circle center of the section under a relative coordinate system can be obtained, and the coordinate is converted into an actual coordinate in an absolute coordinate system. On the basis of determining the actual coordinates of the circle centers of the sections of the deep holes, the circle centers of the sections of the deep holes are sequentially connected, and the obtained curve is regarded as the actual axis of the deep hole. And after the actual axis of the deep hole is obtained, fitting a cylindrical surface which has the minimum diameter and can cover the actual axis, wherein the diameter of the cylindrical surface is the straightness of the measured deep hole.
The specific technical scheme disclosed by the invention is as follows: a device for measuring the roundness and the straightness of a deep hole comprises a fixed cylinder, a connecting shaft, a laser displacement sensor, a two-dimensional position sensitive sensor, an inclination angle sensor, a driving motor and a motor supporting block, wherein a first through hole is formed in the axis position of the fixed cylinder; the two-dimensional position sensitive sensor and the inclination angle sensor are fixed on the motor supporting block and are positioned outside the first through hole; the driving motor is positioned in the first through hole and fixedly connected to the motor supporting block; the connecting axle is located the tip of first through-hole, just connecting axle one end is connected driving motor's drive shaft, connecting axle other end fixedly connected with mounting bracket, fixed connection on the mounting bracket laser displacement sensor.
Furthermore, a speed reducer is arranged between the connecting shaft and the driving motor, an input shaft of the speed reducer is fixedly connected with a driving shaft of the driving motor, and an output shaft of the speed reducer is fixedly connected with the connecting shaft.
Further, a bearing mechanism is arranged on the connecting shaft and comprises a bearing, a bearing fixing sleeve, an end cover and a bearing locking nut, and the bearing fixing sleeve is fixedly connected in the first through hole; the bearing is located inside the bearing fixing sleeve, the bearing locking nut is in threaded connection with the connecting shaft, the end cover is fixedly connected with the end portion of the fixing sleeve, and the bearing is fixed on the connecting shaft through the bearing locking nut and the end cover.
Furthermore, a proximity switch is arranged on the end face, close to the connecting shaft, of the fixed cylinder, a positioning sheet is fixedly connected to the mounting frame, and the proximity switch outputs an electric signal when the positioning sheet rotates for a circle along the axis of the fixed cylinder.
Furthermore, a plurality of groups of supporting and running mechanisms are uniformly arranged on the outer surface of the fixed cylinder along the circumferential direction, and the axis extension lines of the supporting and running mechanisms are intersected with the axis of the fixed cylinder.
Further, the supporting and traveling mechanism comprises a spring, a universal ball, a supporting outer cylinder, a first gasket and a second gasket, a fixing blind hole is formed in the supporting outer cylinder, and a second through hole is formed in the bottom of the fixing blind hole; the first gasket is positioned at the bottom of the fixed blind hole, the second gasket is positioned at the opening of the fixed blind hole, and the second gasket is in threaded connection with the fixed blind hole; the spring is positioned between the first gasket and the second gasket in the fixed blind hole, one end of the spring is fixedly connected with the first gasket, and the other end of the spring is fixedly connected with the second gasket; the universal ball comprises a ball body and a fixed seat, the ball body is embedded into one end of the fixed seat and can rotate in any direction, and the other end of the fixed seat penetrates through the second through hole to be fixedly connected with the first gasket.
Furthermore, the axis of the first through hole is superposed with the axis of a driving shaft on the driving motor, the axis of an input/output shaft on the speed reducer and the axis of the connecting shaft.
The device further comprises a laser emitter, wherein the laser emitter is positioned on one side, close to the two-dimensional position sensitive sensor, of the fixed cylinder and used for providing a light source for the two-dimensional position sensitive sensor.
Compared with the prior art, the invention has the following advantages:
1) the measuring device integrates the laser displacement sensor, the two-dimensional position sensitive detector and the inclination angle sensor, can simultaneously measure the roundness and the straightness of the deep-hole part in one measuring process, has high measuring efficiency, and can further improve the accuracy of a measuring result and improve the measuring precision through a plurality of sensors.
2) The measuring device is internally provided with the bearing mechanism and the supporting travelling mechanism, the connecting shaft is coaxially fixed through the bearing mechanism, so that the connecting shaft is prevented from shaking, the measuring device and the deep-hole part are kept coaxial through the supporting travelling mechanism, the moving resistance of the measuring device is small in the moving process, the vibration in the moving process is reduced, and the measuring precision is improved.
Drawings
FIG. 1 is a structural diagram of a device for measuring roundness and straightness of a deep hole according to an embodiment of the present invention;
FIG. 2 is a structural view of a support traveling mechanism in the embodiment of the present invention;
FIG. 3 is a schematic view showing the arrangement of the supporting and traveling mechanism along the circumferential direction of the fixed cylinder in the embodiment of the present invention;
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, and it should be understood that the embodiments described herein are merely for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.
It should be understood that the orientations of "upper", "lower", "inner" and "outer" in the present invention are described based on the orientations of "upper", "lower", "inner" and "outer" in the drawings, which are for convenience of description and do not limit the structure of the present invention.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Example (b):
with reference to fig. 1-3, the device for measuring roundness and straightness of a deep hole disclosed in this embodiment includes a fixed cylinder 13 having a first through hole at an axis position, a connecting shaft 2, a laser displacement sensor 1, a two-dimensional position sensitive sensor 7, an inclination sensor 8, a driving motor 6, and a motor support block 11, wherein the first through hole is internally and fixedly connected with one end of the motor support block 11 through a connecting bolt 12, and the other end of the motor support block 11 extends out of the first through hole; the two-dimensional position sensitive sensor 7 and the tilt angle sensor 8 are fixed on the motor supporting block 11, and the two-dimensional position sensitive sensor 7 and the tilt angle sensor 8 are both positioned outside the first through hole; the driving motor 6 is positioned in the first through hole, and the driving motor 6 is fixedly connected to the motor supporting block 11; connecting axle 2 is located the tip of first through-hole, just 2 one end of connecting axle is connected with reduction gear 5, the input shaft of reduction gear 5 and driving motor 6's drive shaft fixed connection, the output shaft and the 2 fixed connection of connecting axle of reduction gear 5, the 2 other end fixedly connected with mounting bracket 18 of connecting axle, fixed connection on the mounting bracket 18 laser displacement sensor 1.
The connecting shaft 2 is used for connecting the laser displacement sensor 1 and the speed reducer 5, transmitting the torque of the driving motor 6 to the laser displacement sensor 1 and driving the laser displacement sensor 1 to measure one circle of the inner surface of the deep-hole part; and on the other hand, the device is used for positioning the position of the laser displacement sensor 1, so that the rotating motion axis of the laser displacement sensor 1 is superposed with and fixed to the whole axis of the measuring device in the invention, and the influence on the measuring result caused by the axial micro-vibration generated by the rotation of the measuring device in the measuring process is avoided.
The connecting shaft 2 is provided with a bearing mechanism, the bearing mechanism comprises a bearing 3, a bearing fixing sleeve 15, an end cover and a bearing locking nut 14, and the bearing fixing sleeve 15 is fixedly connected in the first through hole; the bearing 3 is located inside the bearing fixing sleeve 15, the bearing locking nut 14 is in threaded connection with the connecting shaft 2, the end cover is fixedly connected with the end part of the fixing cylinder 13, and the bearing 3 is fixed on the connecting shaft 2 through the bearing locking nut 14 and the end cover. In the embodiment, the bearing 3 preferably adopts two angular contact ball bearings, and the back-to-back mounting mode reduces axial movement and increases radial and axial support angle rigidity, so that the deformation resistance of the connecting shaft is improved, and the influence of the deformation of the connecting shaft on the measurement result is effectively avoided. Meanwhile, the bearing 3, the bearing fixing sleeve 15, the end cover and the bearing locking nut 14 are matched to ensure that the axis of the connecting shaft 2 coincides with the axis of the fixing sleeve 13, and the connecting shaft 2 does not axially move, so that the measuring precision is further ensured.
The end face, close to the connecting shaft, of the fixed cylinder 13 is provided with a proximity switch 16, a positioning piece 17 is fixedly connected to the mounting frame 18, the proximity switch 16 outputs an electric signal every time the positioning piece 17 rotates for a circle along the axis of the fixed cylinder, and the electric signal can participate in controlling the start and stop of the driving motor 6. Because the measuring device is internally provided with a plurality of data lines and power lines, the line winding can be avoided by adopting a mode of alternating forward and reverse rotation of the driving motor, but because assembly gaps exist when the driving motor 6, the speed reducer 5, the connecting shaft 2 and other parts in the measuring device are installed in a matched mode, when the laser displacement sensor 1 rotates forwards and reversely in one cycle, reverse gaps exist in the forward and reverse rotation directions of the driving motor 6, namely the assembly gaps need to be eliminated firstly when the driving motor 6 rotates actually, the laser displacement sensor 1 can be driven to rotate, in order to ensure that the laser displacement sensor 1 can accurately measure the profile of the section of the deep hole, the actual rotation angle of the laser displacement sensor 1 is recorded and positioned by adopting the positioning sheet 17 and the proximity switch 16, and the influence of the reverse gaps is eliminated.
The outer surface of the fixed cylinder 13 is uniformly provided with a plurality of supporting travelling mechanisms 4 along the circumferential direction, and the axis extension lines of the supporting travelling mechanisms 4 are intersected with the axis of the fixed cylinder 13. In this embodiment, the fixed cylinder 13 is provided with two sets of supporting traveling mechanisms 4 along the axial direction, and three supporting traveling mechanisms 4 are arranged at intervals of 120 degrees along the circumferential direction of the fixed cylinder 13.
The supporting travelling mechanism 4 comprises a spring 44, a universal ball 41, a supporting outer cylinder 42, a first gasket 43 and a second gasket 45, a fixed blind hole is formed in the supporting outer cylinder 42, and a second through hole is formed in the bottom of the fixed blind hole; the first gasket 43 is positioned at the bottom of the fixed blind hole, the second gasket 45 is positioned at the opening of the fixed blind hole, and the second gasket 45 is in threaded connection with the fixed blind hole; the spring 44 is positioned between the first gasket 43 and the second gasket 45 in the fixing blind hole, one end of the spring 44 is fixedly connected with the first gasket 43, and the other end of the spring 44 is fixedly connected with the second gasket 45; the universal ball 41 comprises a ball body and a fixed seat, the ball body is embedded in one end of the fixed seat and can rotate in any direction, and the other end of the fixed seat penetrates through the second through hole to be fixedly connected with the first gasket 43. In the using process, the universal ball 41 and the first gasket 43 can slide along the supporting outer cylinder 42, meanwhile, in the moving process of the measuring device along the axis of the deep hole, the whole axis of the measuring device is kept coaxial with the axis of the deep hole through the plurality of supporting travelling mechanisms 4, the deviation value between the axis of the measuring device and the circle center of the section of the deep hole is reduced, the universal ball is in rolling contact with the inner surface of the deep hole, the moving resistance of the measuring device is reduced, meanwhile, the spring can reduce the vibration of the measuring device in the moving process, and the measuring precision is improved.
The axis of the first through hole is superposed with the axis of a driving shaft on the driving motor 6, the axis of an input/output shaft on the speed reducer 5 and the axis of the connecting shaft 2.
The device also comprises a laser emitter 10, wherein the laser emitter 10 is positioned on one side of the fixed cylinder 13 close to the two-dimensional position sensitive sensor 7, and during the test process, the measuring device moves, while the position of the laser emitter 10 is kept fixed. When the laser irradiates a certain point on the photosensitive surface of the two-dimensional position sensitive sensor 7, the transverse electric field makes the light generate carriers to form a current flowing to the electrodes at the two ends. When the position of the two-dimensional position sensitive sensor 7 changes, light spots on the two-dimensional position sensitive sensor 7 move between the two poles, output current signals of output poles at the two ends also change accordingly, the position coordinates of the light spot positions can be calculated according to the numerical values of the current signals, and therefore the position of the two-dimensional position sensitive sensor 7 in the space is obtained, and the position of the two-dimensional position sensitive sensor 7 and a measuring device is fixed, so that the space position of the measuring device is indirectly obtained.
In order to facilitate the traction of the measuring device in this embodiment, a connecting rope 19 and a fixed pulley 20 are arranged on the side surface of the laser displacement sensor, and the connecting rope 19 and the fixed pulley 20 are located on the axis extension line of the measuring device.
The laser displacement sensor 1 is used for scanning the section profile of the inner surface of the deep hole and reflecting and measuring coordinate data of the section profile; the two-dimensional position sensitive sensor 7 receives laser emitted by the laser emitter outside the deep hole and reflects the actual spatial position of the measuring device on the axis; the tilt angle sensor 8 calculates the attitude of the tilt angle sensor in the space by using the angular momentum conservation principle of the built-in gyroscope, and further reflects the actual spatial attitude of the measuring device. The computer is used for acquiring parameters of the two-dimensional position sensitive sensor and the tilt angle sensor, so that the spatial pose of the measuring device can be deduced.
The working principle of the measuring device is as follows: firstly, selecting a plurality of measuring sections on a deep-hole part, enabling a measuring device to stably move in the deep-hole part, stopping the device when the measuring device reaches one measuring section, driving a laser displacement sensor to scan the profile of the deep-hole section by a driving motor, obtaining the relative coordinates of the profile of the measuring section, and simultaneously recording the actual pose of the measuring device by a two-dimensional position sensitive sensor and an inclination angle sensor. And after the measurement of the section profile is finished, carrying out coordinate transformation on the acquired data by using a computer according to the actual poses recorded by the two-dimensional position sensitive sensor and the tilt sensor to obtain the actual coordinates of the measuring point in an absolute coordinate system.
The coordinate transformation method comprises the following steps:
firstly, a relative coordinate system o '-x' y 'z' is established by taking the center of a two-dimensional sensitive sensor in a measuring device as an original point, then, a deep hole part is fixedly connected with the ground in an initial measuring state, the measuring device is positioned in a deep hole but does not perform measurement, an absolute coordinate system o-xyz is established by taking the center of the two-dimensional sensitive sensor in the state as the original point, and then, the relative coordinate system is superposed with the absolute coordinate system.
When the measuring device is positioned on the measuring section, the tilt sensor obtains the Euler angle of the measuring device, and the rotation sequence is set as z-y-x, namely the tilt sensor firstly rotates around the z axis by a certain angle relative to a coordinate system o ' -x ' y ' z
Then the angle theta is rotated around the y-axis and finally the angle psi is rotated around the x-axis to obtain the final coordinate system. Its transformation matrix can be expressed as:
wherein the content of the first and second substances,
The displacement variation of the measuring device obtained by the two-dimensional position sensitive sensor is (a, b), the moving distance along the axial direction is c, and the horizontal distance between the center of the photosensitive surface of the two-dimensional position sensitive sensor and the laser emission hole on the laser displacement sensor is l. And (3) setting the relative coordinates of a measuring point on the cross section profile measured by the laser displacement sensor as (x ', y ', z '), and setting the actual coordinates of the measuring point corresponding to the absolute coordinate system o-xyz as (x, y, z). Since the relative coordinates (x ', y ', z ') of the measuring point can be measured directly by the laser displacement sensor, the absolute coordinates (x, y, z) of the measuring point can be determined from the transformation matrix:
in the roundness measuring process, the contour coordinate points of one circle of the section of the deep hole are measured by the method, and the roundness of the deep hole is obtained by a minimum area method, a least square circle method or other roundness evaluation methods. For example, least squares rounding: and taking the circle center of the circle with the smallest square sum of the distances from each measuring point to the circumference on the section profile of the deep hole as the circle center, and taking the radius difference of two concentric circles wrapping the section profile of the deep hole as the roundness of the deep hole part.
In the process of measuring the straightness, firstly, the method is utilized to respectively measure and obtain coordinate points of a plurality of deep hole section profiles, each deep hole section profile is respectively used for fitting a circle by a least square method, the circle center of the fitted circle is used as the circle center of the current deep hole section profile, after the absolute coordinate of the circle center of each deep hole interface profile is obtained through coordinate conversion, the circle centers of the deep hole section profiles are sequentially connected, the obtained curve is the actual axis of the deep hole part, a cylindrical surface which is the smallest in diameter and can cover the actual axis is obtained through fitting the actual axis, and the cylindrical surface is the straightness of the measured deep hole part.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (5)
1. A device for measuring the roundness and the straightness of a deep hole is characterized by comprising a fixed cylinder, a connecting shaft, a laser displacement sensor, a two-dimensional position sensitive sensor, an inclination angle sensor, a driving motor and a motor supporting block, wherein a first through hole is formed in the axis position of the fixed cylinder; the two-dimensional position sensitive sensor and the inclination angle sensor are fixed on the motor supporting block and are positioned outside the first through hole; the driving motor is positioned in the first through hole and fixedly connected to the motor supporting block; the connecting shaft is positioned at the end part of the first through hole, one end of the connecting shaft is connected with a driving shaft of the driving motor, the other end of the connecting shaft is fixedly connected with an installation frame, the laser displacement sensor is fixedly connected onto the installation frame, the two-dimensional position sensitive sensor can receive laser emitted by the laser emitter outside the deep hole, and a gyroscope is arranged in the tilt angle sensor; a speed reducer is arranged between the connecting shaft and the driving motor, an input shaft of the speed reducer is fixedly connected with a driving shaft of the driving motor, and an output shaft of the speed reducer is fixedly connected with the connecting shaft; the connecting shaft is provided with a bearing mechanism, the bearing mechanism comprises a bearing, a bearing fixing sleeve, an end cover and a bearing locking nut, and the bearing fixing sleeve is fixedly connected in the first through hole; the bearing is positioned in the bearing fixing sleeve, the bearing locking nut is in threaded connection with the connecting shaft, the end cover is fixedly connected with the end part of the fixing sleeve, and the bearing is fixed on the connecting shaft through the bearing locking nut and the end cover; the end face of the fixed cylinder close to the connecting shaft is provided with a proximity switch, the mounting frame is fixedly connected with a positioning sheet, the positioning sheet rotates for a circle along the axis of the fixed cylinder, the proximity switch outputs an electric signal, and the driving motor rotates forward and backward alternately.
2. The measuring device according to claim 1, wherein a plurality of groups of supporting and traveling mechanisms are uniformly arranged on the outer surface of the fixed cylinder along the circumferential direction, and the extension lines of the axes of the supporting and traveling mechanisms intersect with the axis of the fixed cylinder.
3. The measuring device according to claim 2, wherein the supporting and traveling mechanism comprises a spring, a universal ball, a supporting outer cylinder, a first gasket and a second gasket, a fixed blind hole is formed in the supporting outer cylinder, and a second through hole is formed in the bottom of the fixed blind hole; the first gasket is positioned at the bottom of the fixed blind hole, the second gasket is positioned at the opening of the fixed blind hole, and the second gasket is in threaded connection with the fixed blind hole; the spring is positioned between the first gasket and the second gasket in the fixed blind hole, one end of the spring is fixedly connected with the first gasket, and the other end of the spring is fixedly connected with the second gasket; the universal ball comprises a ball body and a fixed seat, the ball body is embedded into one end of the fixed seat and can rotate in any direction, and the other end of the fixed seat penetrates through the second through hole to be fixedly connected with the first gasket.
4. The measuring device according to claim 3, wherein the axis of the first through hole coincides with the axis of the driving shaft on the driving motor, the axis of the input/output shaft on the speed reducer, and the axis of the connecting shaft.
5. The measuring device of claim 4, further comprising a laser emitter located on a side of the stationary barrel adjacent to the two-dimensional position sensitive sensor.
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| CN112747689B (en) * | 2020-12-25 | 2022-02-18 | 北京理工大学 | Roundness and straightness error measuring system for deep hole parts |
| CN113447004B (en) * | 2021-06-25 | 2023-03-14 | 中国人民解放军63653部队 | Pipeline measuring device |
| CN113751749A (en) * | 2021-09-02 | 2021-12-07 | 上海外高桥造船有限公司 | Boring pin machining device and method for long and straight segmented inner hole |
| CN114061530B (en) * | 2021-11-17 | 2023-04-14 | 大连理工大学 | Deep hole straightness measuring device and method |
| CN114459388B (en) * | 2022-01-18 | 2023-05-30 | 重庆理工大学 | Single-laser double-PSD deep hole straightness detection device and method |
| CN117249762B (en) * | 2023-11-13 | 2024-03-12 | 山西一建集团有限公司 | Window opening size deviation construction detection device |
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| CN104165603A (en) * | 2014-07-24 | 2014-11-26 | 中北大学 | Single-laser single-PSD wireless deep hole straightness detection device |
| US20160282122A1 (en) * | 2015-03-27 | 2016-09-29 | Water Resources Facilties & Maintenace Co., Ltd. | Pipe mapping probe apparatus for searching pipe route position |
| CN107917677A (en) * | 2017-11-07 | 2018-04-17 | 中北大学 | Deep hole circularity real-time detection apparatus |
| CN208635722U (en) * | 2018-08-24 | 2019-03-22 | 广州博研智能科技有限公司 | A kind of automatic rotation detection device of bolt |
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