CN109655016B - On-site part angle measuring device and method - Google Patents
On-site part angle measuring device and method Download PDFInfo
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- CN109655016B CN109655016B CN201910116773.9A CN201910116773A CN109655016B CN 109655016 B CN109655016 B CN 109655016B CN 201910116773 A CN201910116773 A CN 201910116773A CN 109655016 B CN109655016 B CN 109655016B
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- cylindrical structure
- magnetic base
- measuring device
- field part
- part angle
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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
Abstract
The invention discloses a field part angle measuring device and a method, wherein the field part angle measuring device comprises: a magnetic base; the cylindrical structure is vertically arranged on the magnetic base and is connected with the magnetic base into an integral structure; and a light hole is formed in the position, close to the connecting part of the tubular structure and the magnetic base, of the lower end of the tubular structure, and penetrates through the tubular structure. The field part angle measuring device is easy to identify and adjust the angle deviation by increasing the axial distance, so that the verticality deviation between the optical axis of the shooting equipment and the shot object is ensured to be in a small range, the error is ensured to be in an acceptable range when the picture obtained by the shooting equipment measures the relevant angle through software, and the field part angle measurement is facilitated.
Description
Technical Field
The invention relates to the technical field of mechanical installation and maintenance, in particular to a field part angle measuring device and method.
Background
In some mechanical transmissions, the mounting angle between the parts is required to comply with certain requirements. In particular, in the engine gear train, the installation angle between the transmission gears has strict requirements.
In assembly and maintenance work, the angle of the part is often required to be confirmed, in general operation, whether the angle of the part is correct or not is usually judged by comparing the angle with the characteristic part of the peripheral part, the method has low effect and poor accuracy, and tools such as protractors cannot be measured because the part is not a plane part and has different sizes.
At present, digital cameras and mobile phones are widely applied, and the precision of image sensors used by the digital cameras and the mobile phones is high. The angle data of the part can be conveniently obtained by using a digital camera or a mobile phone to shoot a picture of mechanical equipment and then measuring the picture through software. However, this method has a problem in that, when the optical axis of the photographing apparatus is not perpendicular to the subject, a deviation occurs between the measured angle value and the actual value, which is difficult for the photographer to recognize. Fig. 1 shows the results of the observation of the same part with a vertical observer, a rotation of 0.2 ° and a rotation of 10 °, and the data obtained by the angular measurement using software. As can be seen from fig. 1, when the part is deflected by 10 °, the measured angle value deviates by 0.865 °, whereas when the part is deflected by 0.2 °, this deviation value is 0.02 °, so that, in order to increase the measurement accuracy, it is necessary to ensure that the optical axis of the camera is as perpendicular as possible to the object to be photographed, in addition to the accuracy of the camera itself.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a field part angle measuring device and method, which can be used for conveniently measuring the field part angle.
To achieve the above object, the present invention provides an on-site part angle measuring apparatus, including: a magnetic base; the cylindrical structure is vertically arranged on the magnetic base and is connected with the magnetic base into an integral structure; and a light hole is formed in the position, close to the connecting part of the tubular structure and the magnetic base, of the lower end of the tubular structure, and penetrates through the tubular structure.
In a preferred embodiment, the cross-shaped wires are arranged in the upper end surface inner hole and the lower end surface inner hole of the cylindrical structure.
In a preferred embodiment, the cross-wires in the bore of the upper end face and the cross-wires in the bore of the lower end face are aligned.
In a preferred embodiment, the diameter of the light-transmitting hole is smaller than the diameter of the cylindrical structure.
In a preferred embodiment, the cylindrical structure is vertically arranged at the center of the magnetic base.
The invention also provides a method for measuring the angle of the field part by adopting the device for measuring the angle of the field part, which comprises the following steps: adsorbing the field part angle measuring device to a part to be measured through a magnetic base; keeping the optical axis of the shooting equipment aligned with the axis of the cylindrical structure of the field part angle measuring device; observing the coaxiality of the profiles of the inner hole of the upper end face and the inner hole of the lower end face of the tubular structure to judge whether the optical axis of the shooting equipment is vertical to the part to be measured; when the part to be detected is observed to be perpendicular to the optical axis of the shooting equipment, shooting the part to be detected to obtain a picture to be detected; and measuring the corresponding angle in the picture to be measured through software.
The invention also provides a method for measuring the angle of the field part by adopting the device for measuring the angle of the field part, which comprises the following steps: adsorbing the field part angle measuring device to a part to be measured through a magnetic base; keeping the optical axis of the shooting equipment aligned with the axis of the cylindrical structure of the field part angle measuring device; observing the alignment condition of the cross wires in the inner holes of the upper end surface and the lower end surface of the tubular structure to judge whether the optical axis of the shooting equipment is vertical to the part to be measured; when the part to be detected is observed to be perpendicular to the optical axis of the shooting equipment, shooting the part to be detected to obtain a picture to be detected; and measuring the corresponding angle in the picture to be measured through software.
Compared with the prior art, the field part angle measuring device and method provided by the invention have the following advantages: the field part angle measuring device amplifies the tiny angle (verticality) deviation by increasing the axial distance, and is easy to identify and adjust, so that the verticality deviation between the optical axis of the shooting equipment and the shot object is ensured to be in a small range, the error is ensured to be in an acceptable range when the picture obtained by the shooting equipment measures the relevant angle through software, and the field part angle measurement is convenient. The device of the invention is provided with a lighting structure and is easy to observe. Meanwhile, data acquisition (photographing) and measurement (software measurement) are separated, so that remote diagnosis is facilitated.
Drawings
Fig. 1A, 1B, and 1C are schematic diagrams of observation results of the same part when the part is perpendicular to the optical axis of the photographing apparatus, rotated by 0.2 ° and rotated by 10 °, and data results obtained by angle measurement using software, respectively.
Fig. 2 is a schematic perspective view of an on-site part angle measuring apparatus according to an embodiment of the present invention.
FIG. 3 is a front view of a field part angle measurement device according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view of the field part angle measurement device of FIG. 3 taken along the direction E-E.
FIG. 5A is a top view of the field part angle measurement device taken perpendicular to the plane of the part being measured.
FIG. 5B is a top view of the in situ part angle measurement device at 0.2 deg. inclination to the plane of the part being measured.
FIG. 6 is a flow chart of a method for on-site part angle measurement according to an embodiment of the present invention.
FIG. 7 is a flow chart of a method for on-site part angle measurement according to another embodiment of the present invention.
FIG. 8 is a graphical representation of the test results of the field part angle measurement method of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Example 1:
the field part angle measuring apparatus according to a preferred embodiment of the present invention includes: the magnetic base is vertically arranged on the cylindrical structure, and the cylindrical structure is connected with the magnetic base into an integral structure; wherein, the lower extreme of tubular structure is provided with the light trap near the position of tubular structure and the connecting portion of magnetism base 1, and the light trap runs through the tubular structure.
In the above scheme, the diameter of the light transmission hole is smaller than that of the cylindrical structure. The tubular structure is vertically arranged at the central position of the magnetic base.
Example 2:
as shown in fig. 2 to 4, the field part angle measuring apparatus according to the preferred embodiment of the present invention includes: magnetic base 1 and tubular structure 2, tubular structure 2 vertically sets up on magnetic base 1 to be connected as an organic whole structure with magnetic base 1. Preferably, the cylindrical structure 2 is vertically arranged at the center position of the magnetic base 1. Wherein, the lower extreme of tubular structure 2 is provided with light trap 3 near the position of tubular structure 2 with the connecting portion of magnetic base 1, and light trap 3 runs through tubular structure 2, and the diameter of light trap 3 is less than the diameter of tubular structure 2. The cross wires 4 are arranged in the inner holes of the upper end face and the lower end face of the tubular structure 2.
In the scheme, the cross-shaped wire 4 in the inner hole of the upper end face and the cross-shaped wire 4 in the inner hole of the lower end face are arranged in an aligned mode. Preferably, the height of the cylindrical structure 2 is 8-10 times its diameter.
Example 3:
as shown in fig. 6, the present invention also provides a method for measuring an angle of a part on site, comprising the following steps: step 601: adsorbing the field part angle measuring device to a part to be measured through a magnetic base; step 602: keeping the optical axis of the shooting equipment aligned with the axis of the cylindrical structure of the field part angle measuring device; step 603: observing the coaxiality of the profiles of the inner hole of the upper end face and the inner hole of the lower end face of the tubular structure to judge whether the optical axis of the shooting equipment is vertical to the part to be measured; step 604: when the part to be detected is observed to be perpendicular to the optical axis of the shooting equipment, shooting the part to be detected to obtain a picture to be detected; and step 605: the corresponding angle in the picture to be measured is measured by the software.
Example 4:
as shown in fig. 7, the present invention also provides a method for measuring an angle of a part on site, comprising the following steps: step 701: adsorbing the field part angle measuring device to a part to be measured through a magnetic base; step 702: keeping the optical axis of the shooting equipment aligned with the axis of the cylindrical structure of the field part angle measuring device; step 703: observing the alignment condition of the cross wires in the inner holes of the upper end surface and the lower end surface of the tubular structure to judge whether the optical axis of the shooting equipment is vertical to the part to be measured; step 704: when the part to be detected is observed to be perpendicular to the optical axis of the shooting equipment, shooting the part to be detected to obtain a picture to be detected; and step 705: the corresponding angle in the picture to be measured is measured by the software.
Because the cross wires (the coaxial line of the profiles of the inner holes of the upper end face and the lower end face) in the inner holes of the upper end face and the lower end face of the tubular structure are far away from each other in the axial direction, when the measured plane is not perpendicular to the optical axis of the shooting device, the deviation is amplified. As shown in fig. 5A and 5B, even if the optical axis of the camera is tilted by 0.2 ° from the device, a significant deviation of the cross-hair (or misalignment of the upper and lower end face apertures) is observed, while the light-transmitting apertures ensure that the cross-hair at the bottom (or the lower end face aperture profile) is easily observed.
The device can ensure that the perpendicularity of the optical axis of the shooting equipment and the shot object is in a small range, thereby ensuring that the error is in an acceptable range when the picture obtained by the shooting equipment measures the relevant angle through software. Fig. 8 shows an example of the angle in the photograph measured by the software (picpick for example) as 80.86 ° for a true angle of 80.865 °.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. An on-site part angle measuring device, comprising:
the magnetic base can be directly adsorbed to a part to be tested during testing; and
the cylindrical structure is vertically arranged on the magnetic base and is connected with the magnetic base into an integral structure, wherein the height of the cylindrical structure is 8-10 times of the diameter of the cylindrical structure;
a light-transmitting hole is formed in the position, close to the connecting part of the cylindrical structure and the magnetic base, of the lower end of the cylindrical structure, and penetrates through the cylindrical structure; the cross wires are arranged in the upper end face inner hole and the lower end face inner hole of the tubular structure, and the cross wires in the upper end face inner hole and the cross wires in the lower end face inner hole are arranged in an aligned mode.
2. The field part angle measurement device of claim 1, wherein the light-transmissive hole has a diameter that is smaller than a diameter of the cylindrical structure.
3. The field part angle measurement device of claim 1, wherein the cylindrical structure is vertically disposed at a central location of the magnetic base.
4. A method of performing field part angle measurement using the field part angle measurement device of any one of claims 1-3, the method comprising the steps of:
adsorbing the field part angle measuring device to a part to be measured through a magnetic base;
keeping the optical axis of the shooting equipment aligned with the axis of the cylindrical structure of the field part angle measuring device;
observing the alignment condition of the cross wires in the upper end surface inner hole and the lower end surface inner hole of the cylindrical structure to judge whether the optical axis of the shooting equipment is vertical to the part to be detected;
when the part to be detected is observed to be perpendicular to the optical axis of the shooting equipment, shooting the part to be detected to obtain a picture to be detected; and
and measuring the corresponding angle in the picture to be measured through software.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910116773.9A CN109655016B (en) | 2019-02-15 | 2019-02-15 | On-site part angle measuring device and method |
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| CN201910116773.9A CN109655016B (en) | 2019-02-15 | 2019-02-15 | On-site part angle measuring device and method |
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| CN109655016B true CN109655016B (en) | 2020-06-26 |
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| JPS63118606A (en) * | 1986-04-30 | 1988-05-23 | Nkk Corp | Measuring method for roll core |
| CN1542401A (en) * | 2003-05-13 | 2004-11-03 | 中国科学院长春光学精密机械与物理研 | Method for inspecting depth of parallelism for optic axis and mounting basal plane |
| CN1865889A (en) * | 2005-05-18 | 2006-11-22 | 中国科学院长春光学精密机械与物理研究所 | Method for detecting verticality of optical axis and mounting baseplane in optical system |
| KR20100071351A (en) * | 2008-12-19 | 2010-06-29 | 재단법인 포항산업과학연구원 | Method for measuring eccentricity of tube and device thereof |
| CN201569921U (en) * | 2009-12-30 | 2010-09-01 | 江苏技术师范学院 | Solar energy automatic-tracking device |
| CN202142537U (en) * | 2011-08-13 | 2012-02-08 | 吴忠举 | Device for automatically tracking and cleaning solar cell panel |
| CN103954434A (en) * | 2014-04-16 | 2014-07-30 | 青岛歌尔声学科技有限公司 | Optical axis calibration gauge, system and method |
| CN204346271U (en) * | 2015-01-07 | 2015-05-20 | 陕西重型汽车有限公司 | Welding screw measuring for verticality drift |
| CN209214556U (en) * | 2019-02-15 | 2019-08-06 | 广西玉柴机器股份有限公司 | A kind of scene part angle measuring device |
-
2019
- 2019-02-15 CN CN201910116773.9A patent/CN109655016B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61292507A (en) * | 1985-06-20 | 1986-12-23 | Omron Tateisi Electronics Co | Rotary deviation detector |
| JPS63118606A (en) * | 1986-04-30 | 1988-05-23 | Nkk Corp | Measuring method for roll core |
| CN1542401A (en) * | 2003-05-13 | 2004-11-03 | 中国科学院长春光学精密机械与物理研 | Method for inspecting depth of parallelism for optic axis and mounting basal plane |
| CN1865889A (en) * | 2005-05-18 | 2006-11-22 | 中国科学院长春光学精密机械与物理研究所 | Method for detecting verticality of optical axis and mounting baseplane in optical system |
| KR20100071351A (en) * | 2008-12-19 | 2010-06-29 | 재단법인 포항산업과학연구원 | Method for measuring eccentricity of tube and device thereof |
| CN201569921U (en) * | 2009-12-30 | 2010-09-01 | 江苏技术师范学院 | Solar energy automatic-tracking device |
| CN202142537U (en) * | 2011-08-13 | 2012-02-08 | 吴忠举 | Device for automatically tracking and cleaning solar cell panel |
| CN103954434A (en) * | 2014-04-16 | 2014-07-30 | 青岛歌尔声学科技有限公司 | Optical axis calibration gauge, system and method |
| CN204346271U (en) * | 2015-01-07 | 2015-05-20 | 陕西重型汽车有限公司 | Welding screw measuring for verticality drift |
| CN209214556U (en) * | 2019-02-15 | 2019-08-06 | 广西玉柴机器股份有限公司 | A kind of scene part angle measuring device |
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| CN109655016A (en) | 2019-04-19 |
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