CN108387182B - Aperture measuring device and measuring equipment - Google Patents
Aperture measuring device and measuring equipment Download PDFInfo
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- CN108387182B CN108387182B CN201810476420.5A CN201810476420A CN108387182B CN 108387182 B CN108387182 B CN 108387182B CN 201810476420 A CN201810476420 A CN 201810476420A CN 108387182 B CN108387182 B CN 108387182B
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- 238000005259 measurement Methods 0.000 claims abstract description 29
- 230000011664 signaling Effects 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003708 edge detection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
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- 238000009776 industrial production Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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Classifications
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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
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses an aperture measuring device and measuring equipment, and relates to the technical field of machine vision. The aperture measuring device comprises a frame, a first light source, an industrial personal computer, an image collector and an image processor. The first light source is fixedly arranged on the frame and is connected with the industrial personal computer, the first light source can irradiate a workpiece, the image collector is fixedly arranged on the frame and is connected with the industrial personal computer, the image collector is used for collecting a picture to be detected of the workpiece and sending the picture to be detected to the industrial personal computer, and the industrial personal computer is connected with the image processor. Compared with the prior art, the aperture measuring device provided by the invention has the advantages that the first light source arranged on the frame, the image collector and the image processor which are respectively connected with the industrial personal computer are adopted, so that the diameter of each hole on a workpiece can be accurately measured by utilizing machine vision, the measurement is convenient, the measurement efficiency is high, the measurement result is accurate, and the practicability is strong.
Description
Technical Field
The invention relates to the technical field of machine vision, in particular to an aperture measuring device and measuring equipment.
Background
In recent years, the development of the machine vision technology is extremely rapid, the application range is relatively wide, and the development prospect is optimistic. Many of the techniques used in machine vision technology are derived from the computer science, which has been in widespread use today for over 20 years from the beginning, during which the scope and functionality of the application of machine vision technology has been perfected due to the continual development of science and the ever-increasing standard requirements of industrial automation. Machine vision is a very active research area, and machine vision technology has also been studied specifically for measurement, but for production measurement of industrial parts, the specification requirements and the measurement accuracy are strict, not only higher measurement speed and accuracy are required, but also non-contact measurement, i.e. on-line measurement, is required, and the accuracy of measurement is ensured, and the disciplines related to the measurement are very wide.
At present, the traditional part measurement is based on contact measurement, and has low efficiency and low precision, and particularly for some multi-hole machined parts, the difficulty of measuring and detecting the aperture of holes is greater, and for some equipment with high measurement precision, the measurement environment is required to be higher and the price is higher.
In view of this, it is important to design and manufacture an aperture measuring device and a measuring apparatus with accurate and efficient measurement, especially in industrial production.
Disclosure of Invention
The invention aims to provide the aperture measuring device which has a simple structure, can accurately measure the diameter of each hole on a workpiece, and is convenient to measure, high in measuring efficiency, accurate in measuring result and high in practicability.
The invention further aims to provide the measuring equipment which is simple in structure, capable of accurately measuring the diameter of each hole on the workpiece, convenient to measure, high in measuring efficiency, accurate in measuring result, high in practicality and high in cost performance.
The invention is realized by adopting the following technical scheme.
The utility model provides an aperture measuring device for measure the diameter of hole on the work piece, aperture measuring device includes frame, first light source, industrial computer, image acquisition ware and image processor, the frame is used for placing the work piece, first light source fixed mounting is in the frame, and be connected with the industrial computer, first light source can shine the work piece, image acquisition ware fixed mounting is in the frame, and be connected with the industrial computer, image acquisition ware is used for gathering the picture that awaits measuring of work piece, and send the picture that awaits measuring to the industrial computer, the industrial computer is connected with image processor, image processor is used for receiving the picture that awaits measuring, and measure the diameter of hole on the work piece according to the picture that awaits measuring.
Further, the frame includes support frame and base station, and the support frame is connected with the base station, and image acquisition device fixed mounting is on the support frame, and first light source is installed on the base station, and corresponds with image acquisition device's position, and the base station is used for placing the work piece.
Further, the support frame is the U-shaped, and the support frame includes first bracing piece, connecting rod and second bracing piece, and the one end and the base station of first bracing piece are connected, and the other end passes through the connecting rod to be connected with the second bracing piece, and the second bracing piece is connected with the base station, and image acquisition device fixed mounting is on the connecting rod.
Further, the aperture measuring device further comprises an inductor and a trigger, the inductor is arranged on the frame and connected with the trigger, the inductor is used for sending a control signal to the trigger when detecting that the workpiece is placed at a preset position, the trigger is connected with the image collector, and the trigger is used for receiving the control signal and controlling the image collector to collect the picture to be measured.
Further, the sensor and the trigger are correlation sensors.
Further, the aperture measuring device further comprises a second light source, the second light source is arranged on the frame and is arranged at intervals with the image collector, and the second light source is used for improving the contrast ratio of the surface features of the workpiece.
Further, the second light source is annular, and the second light source is arranged between the image collector and the first light source, and the position of the second light source corresponds to the position of the first light source.
Further, the first light source is a white light source, and the second light source is an infrared light source.
Further, the image collector is an industrial camera.
The utility model provides a measuring equipment for measure the diameter of hole on the work piece, measuring equipment includes aperture measuring device and removes the frame, aperture measuring device includes the frame, first light source, the industrial computer, image acquisition unit and image processor, rack-mount is on removing the frame, the frame is used for placing the work piece, first light source fixed mounting is in the frame, and be connected with the industrial computer, first light source can shine the work piece, image acquisition unit fixed mounting is in the frame, and be connected with the industrial computer, image acquisition unit is used for gathering the picture that awaits measuring of work piece, and send the picture that awaits measuring to the industrial computer, the industrial computer is connected with image processor, image processor is used for receiving the picture that awaits measuring, and measure the diameter of hole on the work piece according to the picture that awaits measuring.
The aperture measuring device and the measuring equipment provided by the invention have the following beneficial effects:
The invention provides an aperture measuring device, wherein a rack is used for placing a workpiece, a first light source is fixedly arranged on the rack and connected with an industrial personal computer, the first light source can irradiate the workpiece, an image collector is fixedly arranged on the rack and connected with the industrial personal computer, the image collector is used for collecting a picture to be measured of the workpiece and sending the picture to be measured to the industrial personal computer, the industrial personal computer is connected with an image processor, and the image processor is used for receiving the picture to be measured and measuring the diameter of a hole on the workpiece according to the picture to be measured. Compared with the prior art, the aperture measuring device provided by the invention has the advantages that the first light source arranged on the frame, the image collector and the image processor which are respectively connected with the industrial personal computer are adopted, so that the diameter of each hole on a workpiece can be accurately measured by utilizing machine vision, the measurement is convenient, the measurement efficiency is high, the measurement result is accurate, and the practicability is strong.
The measuring equipment provided by the invention comprises the aperture measuring device, is simple in structure, can accurately measure the diameter of each hole on the workpiece by utilizing machine vision, and is convenient to measure, high in measuring efficiency, accurate in measuring result, high in practicality and high in cost performance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a measuring apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of an aperture measurement device according to an embodiment of the present invention;
FIG. 3 is a block diagram showing the construction of an aperture measuring apparatus according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of another view angle of the aperture measurement device according to the embodiment of the present invention.
Icon: 10-measuring equipment; 100-aperture measuring means; 110-a frame; 111-supporting frames; 112-base station; 113-a first support bar; 114-connecting rods; 115-a second support bar; 120-a first light source; 130-an industrial personal computer; 140-an image collector; 150-an image processor; 160-an inductor; 170-a trigger; 180-a second light source; 200-moving the rack.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "inner", "outer", "upper", "lower", "horizontal", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. Features of the embodiments described below may be combined with each other without conflict.
Examples
Referring to fig. 1, an embodiment of the present invention provides a measuring apparatus 10 for measuring a diameter of a hole in a workpiece. The device has the advantages of simple structure, capability of accurately measuring the diameter of each hole on the workpiece, convenience in measurement, high measurement efficiency, accurate measurement result, strong practicality and high cost performance. The measuring apparatus 10 includes an aperture measuring device 100 and a movable frame 200. The aperture measuring device 100 is mounted on the moving frame 200, the moving frame 200 supports the aperture measuring device 100 and can drive the aperture measuring device 100 to move, so that the aperture measuring device 100 is convenient to transport, and the aperture measuring device 100 is used for measuring the diameter of a hole on a workpiece. In this embodiment, a plurality of holes are disposed on the measured workpiece, wherein holes with the same diameter and holes with different diameters are disposed, if a contact measurement method is adopted, multiple contact measurements are required, the measurement efficiency is low, and the measurement accuracy is low.
Referring to fig. 2 and 3 in combination, the aperture measuring device 100 includes a frame 110, a first light source 120, an industrial personal computer 130, an image collector 140, an image processor 150, a sensor 160, a trigger 170, and a second light source 180. The frame 110 is mounted on the moving frame 200, and the moving frame 200 supports the frame 110 and can drive the frame 110 to move, so that the transportation is facilitated. The frame 110 is used for placing a workpiece and facilitating measurement of the workpiece. The first light source 120 is fixedly installed on the frame 110 and connected with the industrial personal computer 130, and the industrial personal computer 130 can control the first light source 120 to be turned on or turned off. The first light source 120 is capable of illuminating the workpiece to exclude the effects of ambient light factors. The second light source 180 is installed on the frame 110 and is spaced from the image collector 140, the second light source 180 is used for improving the contrast of the surface features of the workpiece, the second light source 180 is connected with the industrial personal computer 130, and the industrial personal computer 130 can control the second light source 180 to be turned on or off. The image collector 140 is fixedly installed on the frame 110 and connected with the industrial personal computer 130, and the image collector 140 is used for collecting a picture to be measured of the workpiece and sending the picture to be measured to the industrial personal computer 130. The industrial personal computer 130 is connected with the image processor 150, the industrial personal computer 130 can send the picture to be measured to the image processor 150, and the image processor 150 is used for receiving the picture to be measured and measuring the diameter of the hole on the workpiece according to the picture to be measured. The sensor 160 is mounted on the frame 110 and connected to the trigger 170, and the sensor 160 is configured to send a control signal to the trigger 170 when detecting that the workpiece is placed at a preset position. The trigger 170 is connected to the image collector 140, and the trigger 170 is configured to receive the control signal and control the image collector 140 to collect the image to be measured.
When the diameter of the hole on the workpiece needs to be measured, the first light source 120 and the second light source 180 are turned on by the industrial personal computer 130, then the workpiece is placed at a preset position corresponding to the positions of the first light source 120 and the second light source 180, after the sensor 160 detects that the workpiece is placed at the preset position, the image collector 140 is controlled by the trigger 170 to photograph the workpiece, a picture to be measured is collected and sent to the industrial personal computer 130, the picture to be measured is analyzed and processed by the industrial personal computer 130 by the image processor 150, the diameter of the hole on the workpiece is obtained, and the diameter data is sent to the industrial personal computer 130 for a user to read.
It should be noted that, the image processor 150 is utilized to analyze the image to be measured, so that not only the diameter of the holes on the workpiece can be obtained, but also the central coordinate values of the holes can be obtained at the same time, and the user can calculate the distance between the holes according to the central coordinate values of the holes, so that the method is practical and efficient.
It should be noted that, after the image processor 150 receives the image to be detected, the edge detection of the contour of the workpiece is performed by the 3X3 mask edge detection of the Laplace edge detection operator and the calculation of the CNN edge contour similarity, then the influence of the environmental noise on the feature information can be directly ignored by the similarity analysis of the contour edge, so as to obtain a relatively complete contour, and the blank contour inside the workpiece is the contour of the hole, and then the calculation of each contour is performed by matrix transformation so as to obtain the diameter of the hole and the central coordinate value of the hole.
It is noted that, the sensor 160 and the trigger 170 are two opposite-emitting sensors, the light beam emitted from the emitting end of the opposite-emitting sensor is received by the receiving end of the opposite-emitting sensor, the opposite-emitting sensor outputs a high level, and the light beam emitted from the emitting end of the opposite-emitting sensor is not received by the receiving end of the opposite-emitting sensor, the opposite-emitting sensor outputs a low level. In this embodiment, when a workpiece is placed at a preset position, a light beam emitted by the emitting end of the sensor 160 is blocked by the workpiece, the receiving end of the sensor 160 cannot receive the light beam, the sensor 160 outputs a low level to the trigger 170, the low level is a control signal, after the trigger 170 receives the control signal, the emitting end of the trigger 170 emits the light beam, the receiving end of the trigger 170 receives the light beam, at this time, the trigger 170 outputs a high level to the image collector 140, and the image collector 140 starts after sensing the high level, photographs the workpiece, and collects a picture to be measured.
The frame 110 includes a support 111 and a base 112. The support 111 is connected with the base 112, and the base 112 is installed on the movable frame 200, and the movable frame 200 supports the base 112 to can drive the base 112 to move, be convenient for transport. The image collector 140 is fixedly installed on the supporting frame 111 and is arranged at intervals with the base 112, so that a photo can be conveniently taken. The first light source 120 is mounted on the base 112, and corresponds to a position of the image collector 140, and the base 112 is used for placing a workpiece.
Referring to fig. 4, in the present embodiment, the supporting frame 111 is U-shaped, and the supporting frame 111 includes a first supporting rod 113, a connecting rod 114 and a second supporting rod 115. One end of the first support rod 113 is connected to the base 112, the other end is connected to the second support rod 115 through a connecting rod 114, and the second support rod 115 is connected to the base 112. The image collector 140 is fixedly installed on the connection rod 114 to photograph the workpiece. Specifically, the image collector 140 is mounted at the middle of the connection rod 114, and the first light source 120 is mounted at the middle of the base 112.
In this embodiment, the second light source 180 is annular, the second light source 180 is disposed between the image capturing device 140 and the first light source 120, the position of the second light source 180 corresponds to the position of the first light source 120, and the image capturing device 140 captures a workpiece located on the first light source 120. Specifically, the first light source 120 is a white light source, the second light source 180 is an infrared light source, and the image collector 140 is an industrial camera.
In the process of collecting the picture to be measured, the workpiece is placed on the base 112 and corresponds to the position of the first light source 120, the light emitted by the first light source 120 irradiates the outside through the hole on the workpiece, the image collector 140 shoots the workpiece to form the picture to be measured, and the position of the bright light in the picture to be measured is the position of the hole on the workpiece.
According to the aperture measuring device 100 provided by the embodiment of the invention, the frame 110 is used for placing a workpiece, the first light source 120 is fixedly arranged on the frame 110 and is connected with the industrial personal computer 130, the first light source 120 can irradiate the workpiece, the image collector 140 is fixedly arranged on the frame 110 and is connected with the industrial personal computer 130, the image collector 140 is used for collecting a picture to be measured of the workpiece and transmitting the picture to be measured to the industrial personal computer 130, the industrial personal computer 130 is connected with the image processor 150, and the image processor 150 is used for receiving the picture to be measured and measuring the diameter of a hole on the workpiece according to the picture to be measured. Compared with the prior art, the aperture measuring device 100 provided by the invention adopts the first light source 120 arranged on the frame 110, and the image collector 140 and the image processor 150 respectively connected with the industrial personal computer 130, so that the diameter of each hole on a workpiece can be accurately measured by utilizing machine vision, the measuring is convenient, the measuring efficiency is high, the measuring result is accurate, the practicability is strong, the measuring equipment 10 is stable and efficient, and the user experience is good.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The aperture measuring device is used for measuring the diameter of a hole on a workpiece and is characterized by comprising a frame, a first light source, an industrial personal computer, an image collector and an image processor, wherein the frame is used for placing the workpiece, the first light source is fixedly arranged on the frame and is connected with the industrial personal computer, the first light source can irradiate the workpiece, the image collector is fixedly arranged on the frame and is connected with the industrial personal computer, the image collector is used for collecting a picture to be measured of the workpiece and sending the picture to be measured to the industrial personal computer, the industrial personal computer is connected with the image processor, and the image processor is used for receiving the picture to be measured and measuring the diameter of the hole on the workpiece according to the picture to be measured;
the aperture measuring device further comprises an inductor and a trigger, wherein the inductor is arranged on the rack and is connected with the trigger, the inductor is used for sending a control signal to the trigger when detecting that the workpiece is placed at a preset position, the trigger is connected with the image collector, and the trigger is used for receiving the control signal and controlling the image collector to collect the picture to be measured;
The sensor and the trigger are two opposite-emission sensors, when the light beam emitted by the emitting end of the opposite-emission sensor is received by the receiving end of the opposite-emission sensor, the opposite-emission sensor outputs a high level, and when the light beam emitted by the emitting end of the opposite-emission sensor is not received by the receiving end of the opposite-emission sensor, the opposite-emission sensor outputs a low level; when a workpiece is placed at a preset position, a light beam emitted by the emitting end of the sensor is blocked by the workpiece, the receiving end of the sensor cannot receive the light beam, the sensor outputs a low level to the trigger, the low level is a control signal, after the trigger receives the control signal, the emitting end of the trigger emits the light beam, the receiving end of the trigger receives the light beam, at the moment, the trigger outputs a high level to the image collector, the image collector starts after sensing the high level, the workpiece is shot, and the picture to be detected is acquired;
The frame comprises a support frame and a base station, the support frame is connected with the base station, the image collector is fixedly arranged on the support frame, the first light source is arranged on the base station and corresponds to the position of the image collector, and the base station is used for placing the workpiece;
The support frame is the U-shaped, the support frame includes first bracing piece, connecting rod and second bracing piece, the one end of first bracing piece with the base station is connected, and the other end passes through the connecting rod with the second bracing piece is connected, the second bracing piece with the base station is connected, image acquisition device fixed mounting in on the connecting rod.
2. The aperture measuring device of claim 1, further comprising a second light source mounted to the housing and spaced from the image collector, the second light source for enhancing contrast of the workpiece surface features.
3. The aperture measuring device of claim 2, wherein the second light source is annular, the second light source is disposed between the image collector and the first light source, and a position of the second light source corresponds to a position of the first light source.
4. The aperture measuring device of claim 2, wherein the first light source is a white light source and the second light source is an infrared light source.
5. The aperture measurement device of claim 1, wherein the image collector is an industrial camera.
6. A measuring apparatus for measuring the diameter of a hole in a workpiece, comprising a mobile carriage on which the frame is mounted, and an aperture measuring device as claimed in any one of claims 1 to 5.
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| CN201810476420.5A CN108387182B (en) | 2018-05-17 | 2018-05-17 | Aperture measuring device and measuring equipment |
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| CN201810476420.5A CN108387182B (en) | 2018-05-17 | 2018-05-17 | Aperture measuring device and measuring equipment |
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| CN108387182B true CN108387182B (en) | 2024-06-14 |
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| CN208419904U (en) * | 2018-05-17 | 2019-01-22 | 广东省智能制造研究所 | A kind of aperture measurement device and measuring device |
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| CN105606153A (en) * | 2016-02-19 | 2016-05-25 | 珠海格力电器股份有限公司 | Detection trigger mechanism suitable for automatic detection machine and automatic detection machine with same |
| CN105890530B (en) * | 2016-06-24 | 2018-10-30 | 窦柏林 | A kind of identification of steel wire rope surface damage and diameter measurement asynchronous detection system |
| CN106091926B (en) * | 2016-07-06 | 2018-08-14 | 中国计量大学 | The detection device and method of the miniature workpiece inside groove size of the asynchronous exposure of multi-point source |
| CN107796825B (en) * | 2016-09-01 | 2021-01-05 | 宁波舜宇光电信息有限公司 | Device detection method |
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| CN206208201U (en) * | 2016-11-21 | 2017-05-31 | 漳州盈塑工业有限公司 | The automatic measurement mechanism of round piece |
| CN208419904U (en) * | 2018-05-17 | 2019-01-22 | 广东省智能制造研究所 | A kind of aperture measurement device and measuring device |
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