CN112344858A - Workpiece double-face same-position synchronous detection method and device - Google Patents
Workpiece double-face same-position synchronous detection method and device Download PDFInfo
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- CN112344858A CN112344858A CN202011319168.0A CN202011319168A CN112344858A CN 112344858 A CN112344858 A CN 112344858A CN 202011319168 A CN202011319168 A CN 202011319168A CN 112344858 A CN112344858 A CN 112344858A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a workpiece double-face homothetic synchronous detection method and a device, wherein a combined lens containing a coaxial optical module is arranged below a camera, the camera is connected with the combined lens containing the coaxial optical module, the workpiece is fixed on a workpiece clamp supporting plate structure, two sides of the workpiece clamp supporting plate structure are provided with a reflector bracket structure in a mirror image mode, the reflector bracket comprises a reflector bracket bottom plate structure, an inclined surface and two inclined rib plate structures, a reflector is connected on the inclined surface in an adhesive mode, the reflector bracket bottom plate structure with adjustable position is arranged below the inclined rib plate structure, a measuring supporting platform structure is arranged below the reflector bracket bottom plate structure, the position of the reflector bracket bottom plate structure relative to the measuring supporting platform structure is adjusted through a long countersunk hole, the precision positioning is realized by means of the stepping motor, the symmetry is ensured by the reflector bracket bottom plate and the workpiece clamp, and the image comparison analysis is facilitated.
Description
Technical Field
The invention belongs to the technical field of instrument detection devices, and particularly relates to a workpiece double-face same-position synchronous detection method and device.
Background
At present, the positioning relation between double-sided characteristics of plate parts and disc parts is detected manually mainly by mechanical measuring tools such as calipers, detection columns and the like, the operation is very inconvenient, and particularly, the disc parts have larger measurement errors due to lack of straight measurement standards. Taking a drilling process as an example, perpendicularity detection (drilling deviation detection) of a through hole is one example, and usually, a detection column is inserted into a part hole to detect the position degree of the part hole, so that the perpendicularity of the detection column cannot be guaranteed during operation, and the detection column is easily damaged. The method is a common method for detecting the position degree of a single-sided hole, and the detection method of the perpendicularity or positioning errors of the through hole on the precision part on the front side and the back side cannot be used. For parts such as eccentric bearings, double-sided workpieces and the like, which have different local characteristics on both sides and have high requirements for positioning among the local characteristics, an ideal precise detection means is not yet provided at present.
Through the research on the spot, find that position degree detects special use in the machining enterprise and examines a lot of quantity and variety, and is with high costs and damage easily and cause the consumption big. There are also few studies or patents in literature research aimed at such applications. The utility model CN201820461715.0 is a representative potential image measurement technology, and is characterized in that two cameras are symmetrically arranged to take pictures respectively, and spatial position deviation is easy to occur when the two cameras are used, for example, the symmetry and the coaxiality of the spatial positions of the two cameras cannot be ensured; the synchronism of the photographing time of the two cameras is poor, and the longer the photographing interval of the two cameras is, the more possible noise and workpiece jitter and displacement are introduced; the consistency of the images is poor, and particularly, crosstalk occurs when the two sides of the workpiece are photographed, so a method and a device for synchronously detecting the two sides of the workpiece in an in-situ manner need to be designed to solve the above problems.
Disclosure of Invention
The invention aims to provide a method and a device for synchronously detecting double sides of workpieces in a same position aiming at the technical problems in the prior art, and the specific technical scheme is as follows:
the invention provides a workpiece double-face homothetic synchronous detection device, which comprises a camera, wherein a combined lens containing a coaxial optical module is arranged below the camera, the camera is connected with the combined lens containing the coaxial optical module, light emitted by a direct-current cold light source is introduced into the coaxial optical module through a light guide optical fiber to realize coaxial polishing, a workpiece is clamped and fixed on a workpiece clamp supporting plate structure through a workpiece clamp with adjustable position, a workpiece clamp supporting plate is fixedly connected with a lead screw moving slide block of a stepping motor in a bolt mode, two sides of the workpiece clamp supporting plate structure are provided with a reflector bracket structure in a mirror image mode, the reflector bracket comprises a reflector bracket bottom plate structure, an inclined plane and two inclined rib plate structures, a reflector is connected on the inclined plane in an adhesive mode, the position-adjustable reflector bracket bottom plate structure is arranged below the inclined rib plate structure, the lower part of the reflector bracket bottom plate structure is provided with a measuring support platform structure, the reflector bracket bottom plate structure is adjusted through a long-strip counter sink and corresponds to the position on the measuring support platform structure, and the detecting support platform structure is used for supporting the whole detecting device and providing a flat surface.
The invention is further improved in that: and a vibration isolation structure or a height-adjustable damping anchor is arranged below the measuring support platform.
The invention is further improved in that: and a light filtering film or a front light filter (used for avoiding strong metal reflection and reducing the influence of reflection on the surface of a workpiece) is adhered to the imaging target surface of the camera.
The invention is further improved in that: the position-adjustable reflector bracket is used for supporting the reflector, the reflecting surfaces of the two reflectors which are arranged in a left mirror image and a right mirror image form an included angle of 45 degrees with the vertical line, the reflecting surfaces are inclined upwards, and the reflector can be adhered to the inclined surface in use.
The invention is further improved in that: the use method of the workpiece double-face same-position synchronous detection device comprises the following steps:
1) the stepping motor rotates to drive the lead screw to rotate, and further drives the lead screw to move the sliding block to and fro below the camera, namely a measuring station and a workpiece taking and placing station, so that the arrangement has the advantages that 1) the reflector is prevented from being touched and polluted; 2) the positioning precision of the stepping motor can reach micron level, so that each workpiece can be ensured to be at the same position during detection, and the standard workpiece (without defect) image and the workpiece image to be detected can be conveniently compared and analyzed; 3) the front and back sides of the same workpiece are conveniently compared and analyzed, the measurement is more stable, the bottom surface of the workpiece clamp with the adjustable position is fixedly connected with a screw rod moving slide block of a stepping motor through a bolt, a back plate of a stepping motor module and a measurement support platform are connected with a stepping motor module through a bolt mode and used for conveying the workpiece clamp and the workpiece to a measurement station (an imaging position below a camera) and a workpiece taking station, and the measurement station is specifically arranged at the central positions of a left reflector and a right reflector which are arranged in a mirror image mode; the workpiece taking station is specifically the position where the reflector is prevented from being touched. The function of conveying and positioning the workpiece is realized, the bottom surface of the workpiece clamp with adjustable position is fixedly connected with a screw rod moving slide block of a stepping motor through a bolt, a back plate of a stepping motor module and a measuring support table are connected with a stepping motor module through a bolt mode and used for conveying the workpiece clamp and the workpiece to a measuring station and a workpiece taking station, the measuring station is arranged below a camera, and is specifically arranged at the central position of a left reflector and a right reflector which are arranged in a mirror image mode, the automatic detection device has the advantages that manual misoperation and reflector pollution are avoided, the accurate positioning is guaranteed, the workpiece imaging at each time is guaranteed to be at the same position, the repeatability and the stability of detection are guaranteed, the accurate positioning is realized by means of the stepping motor, the measurement of different workpieces is guaranteed to be at the same pose, the position of the workpiece clamp is adjustable, the symmetry of the workpiece clamp is guaranteed, and the subsequent image comparison analysis is facilitated.
2) The motion and the positioning of a stepping motor are realized by transmitting pulses through upper computer software, and the triggering of image acquisition and image analysis detection is realized, the acquired image comprises a left part and a right part (or an upper part and a lower part depending on the arrangement position of a camera) which correspond to two side surfaces of a workpiece, the relative position relation of each component is designed and determined, and the position of the workpiece clamp is adjustable, so that the workpiece clamp can be used for fine adjustment to ensure the whole symmetry, the convenience of image analysis is ensured, the position of the workpiece clamp is adjustable, the workpiece clamp plays a role in clamping and fixing the workpiece, and the workpiece clamp can be fine adjusted to ensure that the workpiece is coplanar with the symmetrical center plane of a reflector when the workpiece is vertically placed.
The invention has two reflectors which are arranged symmetrically face to face at an angle of 45 degrees with the horizontal plane, the workpiece is measured at the symmetrical line position, object rays on two side surfaces of the workpiece horizontally reach the surface of the reflector, and the object rays are reflected by the reflectors and upwards enter a lens to reach the imaging target surface of the camera for imaging. According to the plane mirror imaging principle, a camera shoots a virtual image of an object, namely, the virtual image is shot under the working condition that the side surface of a workpiece is horizontally placed. Therefore, the two parts of the acquired image correspond to the side surfaces shot when the two side surfaces of the workpiece are horizontally placed, and the shooting is equivalent to the shooting perpendicular to the side surfaces of the workpiece.
The invention has the beneficial effects that:
the invention can realize the detection and analysis of the relative position between the local characteristics on the two side surfaces of the plate type and disc type precision parts, solves the problem which puzzles the field of position degree detection for a long time, has simple and ingenious design, convenient operation and easy understanding and use, the invention is particularly suitable for detecting plates, discs and the like which need the relative positioning of two-sided structural features, such as the deflection detection of a processing hole and the relative position relation detection between the local structural features on the two sides of a disc part, adopts a reflector and designs a special light path system to ensure that the two sides of the part are imaged on the same camera target surface simultaneously, the hardware is further designed with the matching modules of feeding, clamping and the like, so that the operation is convenient, the visual angle conversion is further introduced in the aspect of software image processing, the influence of part clamping errors is greatly reduced, and convenient contrast observation and identification of positioning, the invention has the obvious advantages that the double-sided imaging is carried out on the same camera: 1) the spatial position deviation of the arrangement of the two cameras is avoided, and the symmetry and the coaxiality of the spatial positions are ensured; 2) poor synchronism of the photographing time of the two cameras is avoided; 3) the consistency of the images is guaranteed, and the design has strong practicability and wide market application prospect.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
description of the drawings: the device comprises a camera 1, a light filter 2, a light filter 3, a combined lens containing a coaxial light module, a workpiece 4, a workpiece 5, a workpiece clamp 6, a workpiece clamp support plate 7, a reflector support structure 8, a reflector support bottom plate structure 9, an inclined plane 10, an inclined rib plate structure 11, a reflector 12, a stepping motor linear module 13 and a measurement support platform.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
The embodiment provides a synchronous detection device for double-sided homothety of a workpiece, which comprises a camera 1, wherein a light filter film 2 or a front light filter is adhered on an imaging target surface of the camera 1 and used for avoiding strong metal reflection and reducing the influence of reflection on the surface of the workpiece, a combined lens 3 containing a coaxial light module is arranged below the camera 1, the camera 1 is connected with the combined lens 3 containing the coaxial light module, light emitted by a direct-current cold light source is introduced into the coaxial light module through a light guide optical fiber to realize coaxial light striking, the workpiece 4 is clamped and fixed on a workpiece clamp supporting plate structure 6 through a workpiece clamp 5 with adjustable position, the workpiece clamp supporting plate 6 is fixedly connected with a lead screw moving slide block of a stepping motor in a bolt mode, and reflector supporting structures 7 are arranged on two sides of the workpiece clamp supporting plate 6 in a mirror image mode, a stepping motor linear module 12 is arranged below the workpiece clamp supporting plate 6, and a measuring supporting table 13 is arranged below the stepping motor linear module 12 and the support bottom plate structures 8 on the two sides.
The reflector bracket 7 comprises a reflector bracket bottom plate structure 8, an inclined plane 9 and two inclined rib plate structures 10, a reflector 11 is connected to the inclined plane 9 in an adhesive mode, the adhesive mode can be achieved by glass glue or UV glue, the position of the reflector bracket 7 can be adjusted, the reflector 11 is used for supporting, two reflecting surfaces of the reflector 11 are arranged in a left mirror image mode and a right mirror image mode, a 45-degree included angle is formed between the reflecting surfaces of the reflector 11 and a vertical line, the reflecting surfaces are inclined upwards, and the reflector 11 can be used in an adhesive mode on the inclined plane 9. The below of inclined rib plate structure 10 is provided with position adjustable reflector bracket bottom plate structure 8, the below of reflector bracket bottom plate structure 8 is provided with measures a supporting bench structure 11, reflector bracket bottom plate structure 8 adjust through rectangular counter sink for measure the position on the supporting bench structure 11, it is used for supporting whole detection device to detect supporting bench structure 11, provides a planarization face, the below of measuring supporting bench 11 sets up vibration isolation structure or shock attenuation lower margin.
The use method of the workpiece double-face same-position synchronous detection device comprises the following steps:
1) the stepping motor rotates to drive the lead screw to rotate, and further drives the lead screw to move the sliding block to and fro below the camera, namely a measuring station and a workpiece taking and placing station, so that the arrangement has the advantages that 1) the reflector is prevented from being touched and polluted; 2) the positioning precision of the stepping motor can reach micron level, so that each workpiece can be ensured to be at the same position during detection, and the standard workpiece (without defect) image and the workpiece image to be detected can be conveniently compared and analyzed; 3) the front and back sides of the same workpiece are conveniently compared and analyzed, the measurement is more stable, the bottom surface of the workpiece clamp with the adjustable position is fixedly connected with a screw rod moving slide block of a stepping motor through a bolt, a back plate of a stepping motor module and a measurement support platform are connected with a stepping motor module through a bolt mode and used for conveying the workpiece clamp and the workpiece to a measurement station (an imaging position below a camera) and a workpiece taking station, and the measurement station is specifically arranged at the central positions of a left reflector and a right reflector which are arranged in a mirror image mode; the workpiece taking station is specifically the position where the reflector is prevented from being touched. The function of conveying and positioning the workpiece is realized, the bottom surface of the workpiece clamp with adjustable position is fixedly connected with a screw rod moving slide block of a stepping motor through a bolt, a back plate of a stepping motor module and a measuring support table are connected with a stepping motor module through a bolt mode and used for conveying the workpiece clamp and the workpiece to a measuring station and a workpiece taking station, the measuring station is arranged below a camera, and is specifically arranged at the central position of a left reflector and a right reflector which are arranged in a mirror image mode, the automatic detection device has the advantages that manual misoperation and reflector pollution are avoided, the accurate positioning is guaranteed, the workpiece imaging at each time is guaranteed to be at the same position, the repeatability and the stability of detection are guaranteed, the accurate positioning is realized by means of the stepping motor, the measurement of different workpieces is guaranteed to be at the same pose, the position of the workpiece clamp is adjustable, the symmetry of the workpiece clamp is guaranteed, and the subsequent image comparison analysis is facilitated.
2) The motion and the positioning of a stepping motor are realized by transmitting pulses through upper computer software, and the triggering of image acquisition and image analysis detection is realized, the acquired image comprises a left part and a right part (or an upper part and a lower part depending on the arrangement position of a camera) which correspond to two side surfaces of a workpiece, the relative position relation of each component is designed and determined, and the position of the workpiece clamp is adjustable, so that the workpiece clamp can be used for fine adjustment to ensure the whole symmetry, the convenience of image analysis is ensured, the position of the workpiece clamp is adjustable, the workpiece clamp plays a role in clamping and fixing the workpiece, and the workpiece clamp can be fine adjusted to ensure that the workpiece is coplanar with the symmetrical center plane of a reflector when the workpiece is vertically placed.
The invention has two reflectors which are arranged symmetrically face to face at an angle of 45 degrees with the horizontal plane, the workpiece is measured at the symmetrical line position, object rays on two side surfaces of the workpiece horizontally reach the surface of the reflector, and the object rays are reflected by the reflectors and upwards enter a lens to reach the imaging target surface of the camera for imaging. According to the plane mirror imaging principle, a camera shoots a virtual image of an object, namely, the virtual image is shot under the working condition that the side surface of a workpiece is horizontally placed. Therefore, the two parts of the acquired image correspond to the side surfaces shot when the two side surfaces of the workpiece are horizontally placed, and the shooting is equivalent to the shooting perpendicular to the side surfaces of the workpiece.
The invention has the beneficial effects that:
the invention can realize the detection and analysis of the relative position between the local characteristics on the two side surfaces of the plate type and disc type precision parts, solves the problem which puzzles the field of position degree detection for a long time, has simple and ingenious design, convenient operation and easy understanding and use, the invention is particularly suitable for detecting plates, discs and the like which need the relative positioning of two-sided structural features, such as the deflection detection of a processing hole and the relative position relation detection between the local structural features on the two sides of a disc part, adopts a reflector and designs a special light path system to ensure that the two sides of the part are imaged on the same camera target surface simultaneously, the hardware is further designed with the matching modules of feeding, clamping and the like, so that the operation is convenient, the visual angle conversion is further introduced in the aspect of software image processing, the influence of part clamping errors is greatly reduced, and convenient contrast observation and identification of positioning, the invention has the obvious advantages that the double-sided imaging is carried out on the same camera: 1) the spatial position deviation of the arrangement of the two cameras is avoided, and the symmetry and the coaxiality of the spatial positions are ensured; 2) poor synchronism of the photographing time of the two cameras is avoided; 3) the consistency of the images is guaranteed, and the design has strong practicability and wide market application prospect.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent changes may be made in some of the features of the embodiments described above. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.
Claims (5)
1. The utility model provides a two-sided apposition synchronous detection device of work piece which characterized in that: comprises a camera, a combined lens containing a coaxial optical module is arranged below the camera, the camera is connected with the combined lens containing the coaxial optical module, a workpiece is clamped and fixed on a workpiece clamp supporting plate structure through a workpiece clamp with an adjustable position, the workpiece clamp supporting plate is fixedly connected with a lead screw moving slide block of the stepping motor in a bolt mode, the two sides of the workpiece clamp supporting plate structure are provided with a reflector bracket structure in a mirror image mode, the reflector bracket comprises a reflector bracket bottom plate structure, an inclined plane and two inclined rib plate structures, the inclined plane is connected with a reflector in an adhesive way, the position-adjustable reflector bracket bottom plate structure is arranged below the inclined rib plate structure, and a measuring support platform structure is arranged below the reflector support bottom plate structure, and the reflector support bottom plate structure is adjusted to be opposite to the measuring support platform structure through a long countersunk hole.
2. The apparatus for synchronously inspecting double sides of workpieces as claimed in claim 1, wherein: the vibration isolation structure or the height-adjustable shock absorption anchor is arranged below the measuring support platform and made of elastic rubber.
3. The apparatus for synchronously inspecting double sides of workpieces as claimed in claim 1, wherein: and a filter film or a front filter is adhered to the imaging target surface of the camera.
4. The apparatus for synchronously inspecting double sides of workpieces as claimed in claim 1, wherein: the position-adjustable reflector bracket is used for supporting the reflectors and enabling the reflecting surfaces of the two reflectors arranged in a left mirror image mode and the reflecting surfaces of the two reflectors arranged in a right mirror image mode to form an included angle of 45 degrees with a vertical line.
5. A method of the workpiece double-face same-position synchronous detection device according to claim 1, characterized in that:
1) the stepping motor rotates to drive the lead screw to rotate, and further drives the lead screw to move the sliding block to and fro below the camera, namely a measuring station and a workpiece taking and placing station, so that the arrangement has the advantages that 1) the reflector is prevented from being touched and polluted; 2) the positioning precision of the stepping motor can reach micron level, so that each workpiece can be ensured to be at the same position during detection, and the standard workpiece (without defect) image and the workpiece image to be detected can be conveniently compared and analyzed; 3) the front and back sides of the same workpiece are conveniently compared and analyzed, the measurement is more stable, the bottom surface of the workpiece clamp with the adjustable position is fixedly connected with a screw rod moving slide block of a stepping motor through a bolt, a back plate of a stepping motor module and a measurement support platform are connected with a stepping motor module through a bolt mode and used for conveying the workpiece clamp and the workpiece to a measurement station (an imaging position below a camera) and a workpiece taking station, and the measurement station is specifically arranged at the central positions of a left reflector and a right reflector which are arranged in a mirror image mode; taking a workpiece station as a position for avoiding touching a reflector;
2) the motion and the positioning of the stepping motor and the triggering of image acquisition and image analysis detection are realized by transmitting pulses through upper computer software, and the acquired image comprises a left part and a right part (or an upper part and a lower part depending on the arrangement direction of a camera) which correspond to two side surfaces of the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319168.0A CN112344858A (en) | 2020-11-23 | 2020-11-23 | Workpiece double-face same-position synchronous detection method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319168.0A CN112344858A (en) | 2020-11-23 | 2020-11-23 | Workpiece double-face same-position synchronous detection method and device |
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| CN112344858A true CN112344858A (en) | 2021-02-09 |
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| CN202011319168.0A Pending CN112344858A (en) | 2020-11-23 | 2020-11-23 | Workpiece double-face same-position synchronous detection method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115540746A (en) * | 2022-01-06 | 2022-12-30 | 深圳荣耀智能机器有限公司 | Method for detecting position degree of side hole of structural part |
-
2020
- 2020-11-23 CN CN202011319168.0A patent/CN112344858A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115540746A (en) * | 2022-01-06 | 2022-12-30 | 深圳荣耀智能机器有限公司 | Method for detecting position degree of side hole of structural part |
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