CN107131829B - Dimension tolerance detection device and dimension tolerance detection method - Google Patents
Dimension tolerance detection device and dimension tolerance detection method Download PDFInfo
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- CN107131829B CN107131829B CN201710446955.3A CN201710446955A CN107131829B CN 107131829 B CN107131829 B CN 107131829B CN 201710446955 A CN201710446955 A CN 201710446955A CN 107131829 B CN107131829 B CN 107131829B
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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
- 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
- G01B11/2433—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring outlines by shadow casting
Abstract
The invention discloses a dimensional tolerance detection device and a dimensional tolerance detection method. The size tolerance detection device comprises a planar light generator, a planar light receiver, a transparent substrate, a positioner and a computer loaded with a detection program; due to the use of a planar light generator, a more accurate projection can be obtained. When the dimension tolerance detection method is used for detection, by setting the mode that the part abuts against the positioning part of the L-shaped part, each coordinate area can be distinguished to call a detection tool program under a determined plane coordinate system, so that the accurate measurement of the dimension to be detected is realized, meanwhile, the pixel projection drawing can be processed very quickly and simply, and the faster detection is realized.
Description
Technical Field
The invention relates to the field of product detection, in particular to a dimensional tolerance detection device and a dimensional tolerance detection method.
Background
The existing sheet metal-shaped parts are mainly used for sheet metal, and the size and tolerance requirements of the sheet metal-shaped parts are mainly plane size requirements. Of course, in the industry, there are other situations where it is desirable to detect the planar dimensions of a part. In the prior art, when sheet metal parts are fed, the sizes and the tolerances of the parts are mainly detected through a vernier caliper, a micrometer and the like, the labor efficiency is low, the detection accuracy is low, and particularly the detection accuracy is lower when large-size products are faced. If some size detection methods for detecting three-dimensional products, such as a probe method, are adopted, the detection efficiency is also low, and the detection time is long.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a dimensional tolerance detection device and a dimensional tolerance detection method, which improve the labor efficiency and the detection precision, reduce the detection time and further realize the accurate detection of large-size products.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dimensional tolerance detection device, comprising: the device comprises a planar light generator, a planar light receiver, a transparent substrate, a positioner and a computer loaded with a detection program; the planar light generator is arranged opposite to the planar light receiver, and a transparent substrate is arranged in the middle of the planar light generator; the transparent substrate is vertical to the light emitted by the planar light generator; the transparent substrate is provided with at least two mutually vertical outer side edges; the positioner comprises an L-shaped substrate positioning part and an L-shaped part positioning part which are fixedly connected with each other; the L-shaped substrate positioning part is provided with a substrate X-axis positioning inner side edge and a substrate Y-axis positioning inner side edge which are vertical to each other and are used for respectively abutting against two outer side edges of the transparent substrate which are vertical to each other; the L-shaped part positioning part is provided with a part X-axis positioning inner side edge and a part Y-axis positioning inner side edge which are vertical to each other and used for supporting the outer edge surface of the part; the computer with the detection program is used for processing the image received by the planar light receiver and forming the part outline, and is also used for measuring the part outline, comparing the measured part outline with the manually set size and tolerance and outputting a comparison result.
Further, the device also comprises a bottom platform, a vertical rod and a plane light generator support frame; the planar light receiver is horizontally arranged on the bottom platform, and the transparent substrate is arranged above the planar light receiver; the plane light generator support frame is used for supporting the plane light generator to enable the plane light generator to be horizontally downward; the vertical rod is fixedly connected with the base platform and is used for driving the planar light generator support frame to drive the planar light generator to slide up and down.
Furthermore, the device also comprises a light shield and an elastic sealing ring; the light shield is fixedly connected to the lower end of the planar light generator; the elastic sealing ring is arranged on the bottom table and surrounds the planar light receiver; the planar light generator is driven to descend along the vertical rod, and the light shield is abutted to the elastic sealing ring.
In another embodiment, the device further comprises a supporting unit and a driving unit; the supporting unit is fixedly connected with the planar light generator and the planar light receiver; the light generated by the planar light generator is vertical to the horizontal plane; the driving unit is used for driving the supporting unit and driving the planar light generator and the planar light receiver on the supporting unit to move in parallel relative to the transparent substrate.
And the prompting alarm is controlled by the computer loaded with the detection program and gives out a prompt or an alarm when the detection result is unqualified.
The controller is controlled by the computer loaded with the detection program and gives an alarm or controls the driving unit to stop running when the detection result is unqualified.
Furthermore, after the alarm is sent out when the detection result is unqualified, if the controller does not receive other instructions of the computer within the time set by people, the controller controls the driving unit to stop running.
A method for detecting dimensional tolerance, using the above device, comprising the steps of: step 1: inputting the size to be measured and the tolerance value of the part into a computer detection program; and 2, step: setting a mode that a part abuts against a positioning part of an L-shaped part of the positioner, wherein the intersection point of a straight line of the inner side edge of the X-axis positioning of the part of the positioning part of the L-shaped part of the positioner and a straight line of the inner side edge of the Y-axis positioning of the part is defined as the origin of a plane coordinate system; and step 3: determining a detection tool program called by each coordinate area in a plane coordinate system in a detection program according to the size to be detected of the part; and 4, step 4: respectively abutting the inner side edge of the substrate X-axis positioning and the inner side edge of the substrate Y-axis positioning of the L-shaped substrate positioning part of the positioner against two mutually vertical outer side edges of the transparent substrate; and 5: placing the part on a transparent substrate and abutting against the inner side edge of the X-axis positioning of the part and the inner side edge of the Y-axis positioning of the part of the L-shaped part positioning part of the positioner according to the abutting mode determined in the step (2); step 6: removing the positioner; and 7: controlling the planar light generator to emit light; and 8: the planar light receiver receives the image and transmits the image to a computer detection program; and step 9: processing the received image by a computer detection program to form a part outline, and calculating and storing coordinates of all pixel points on the outline on the plane coordinate system according to the position of the origin of the plane coordinate system determined in the step 2; step 10: calling a corresponding detection tool program for detection in the coordinate area determined in the step 3 by the computer detection program to form an actual measurement size; step 11: and (3) comparing the actually measured size with the size to be measured and the tolerance value input in the step (1) by the computer detection program, and outputting a comparison result.
Further, the detection tool program comprises a distance detection tool program; the distance detection tool program comprises the following steps: step 3.11: providing an interface for a user to set a first coordinate area, a second coordinate area, a detection direction and a detection number; the detection direction can be selected from a connecting line parallel to the X-axis direction or the Y-axis direction or between any two pixel coordinates; step 3.12: selecting any point on the contour line in the first coordinate area as a first pixel point; step 3.13: the first pixel point makes a straight line parallel to the detection direction and is crossed with a contour line in the second coordinate area to the second pixel point; step 3.14: calculating the pixel distance between the first pixel point coordinate and the second pixel point coordinate, converting the pixel distance into a length unit distance, namely the measured distance, and storing the measured distance; step 3.15: and repeating the steps 3.12 to 3.14 until the number of the measured distances reaches the set detection number.
Further, the detection tool program comprises an arc segment radius detection tool program; the arc segment radius detection tool program comprises the following steps: step 3.21: providing an interface for a user to set a third coordinate area and the detection number; step 3.22: selecting any three points on the contour line in the third coordinate area; step 3.23: obtaining a pixel coordinate equidistant to the three-point coordinate as a third pixel point; step 3.24: selecting any point on the contour line in the third coordinate area as a fourth pixel point; step 3.25: calculating the pixel distance between the coordinates of the third pixel point and the coordinates of the fourth pixel point, converting the pixel distance into a length unit distance, namely the radius of the actually measured arc section, and storing the distance; step 3.26: and (5) repeating the steps from 3.22 to 3.25 until the number of the measured arc section radiuses reaches the set detection number.
Further, the detection tool comprises an aperture detection tool; the aperture detection tool program comprises the following steps: step 3.31: providing an interface for a user to set a fourth coordinate area and the detection number; step 3.32: selecting any three points on the contour line in the fourth coordinate area; step 3.33: obtaining pixel coordinates equidistant to the three-point coordinates as a fifth pixel point; step 3.34: selecting any point on the contour line in the fourth coordinate area as a sixth pixel point; step 3.35: making a straight line between the fifth pixel point and the sixth pixel point and intersecting the contour line in the fourth coordinate area with the other pixel point, wherein the intersection point is a seventh pixel point; step 3.36: calculating the pixel distance between the coordinates of the sixth pixel point and the coordinates of the seventh pixel point, converting the pixel distance into a length unit distance, namely the actual measurement aperture, and storing the actual measurement aperture; step 3.37: and repeating the steps 3.32 to 3.36 until the number of the measured apertures reaches the set detection number.
Further, the detection tool program comprises a pitch detection tool program; the pitch detection tool program comprises the following steps: step 3.41: providing an interface for a user to set a fifth coordinate area, a sixth coordinate area and the measurement quantity; step 3.42: selecting any three points on the contour line in the fifth coordinate area; step 3.43: solving pixel coordinates equidistant from the three-point coordinates to be an eighth pixel point; step 3.44: selecting any three points on the contour line in the sixth coordinate area; step 3.45: obtaining a pixel coordinate equidistant to the three-point coordinate as a ninth pixel point; step 3.46: calculating the pixel distance between the coordinates of the eighth pixel point and the coordinates of the ninth pixel point, converting the pixel distance into a length unit distance, namely the actual measurement hole distance, and storing the actual measurement hole distance; step 3.47: and repeating the steps 3.42 to 3.46 until the number of the measured hole distances reaches the set detection number.
Further, the computer detection program compares the measured dimension with the measured dimension and the tolerance value input in step 1 in the following manner: comparing the actual measurement size with the corresponding size to be measured and the tolerance value, wherein if the actual measurement size completely accords with the size to be measured and the tolerance value, the comparison result of the size to be measured is qualified; if all the comparison results of the sizes to be measured are qualified, the parts to be measured are qualified; and if any measured dimension does not accord with the measured dimension and the tolerance value, the part to be measured is unqualified.
Further, the method also comprises the step 12: and after the computer detection program detects that the part to be detected is unqualified, the dimensional tolerance detection device sends out a prompt alarm or controls the production line to stop running.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. with the planar light generator, the planar light generator generates a light beam perpendicular to a light emitting plane, and thus a more precise projection can be obtained compared to a point light source. If a laser is used as the light source of the planar light generator, extremely accurate projections can be produced.
2. The positioner is used for determining the coordinate origin and standardizing the placement position of the part on the transparent substrate by taking the transparent substrate as a reference, so that the processing of the part projection is more convenient and quicker, and the introduction of more complex models and calculation is avoided.
3. The vertical rod and the plane light generator support frame are arranged, so that the plane light generator can slide conveniently, and higher projection accuracy is ensured.
4. And the light shield is adopted, so that the influence of external light on the projection precision is avoided.
5. The driving unit drives the planar light generator and the planar light receiver to move in parallel relative to the transparent substrate, so that large-size parts can be scanned and detected.
6. During detection, by means of the mode that the part is arranged to abut against the positioning part of the L-shaped part, each coordinate area can be distinguished under a determined plane coordinate system so as to call a detection tool program.
7. The detection tool program is called in each coordinate area to realize accurate measurement of the size to be measured, so that the pixel projection drawing can be processed very quickly and simply, and faster detection is realized.
8. The distance detection tool performs detection in the set coordinate area, so that the distance detection method is simplified, and the detection efficiency is improved.
9. The arc radius detection tool program, the aperture detection tool program and the pitch detection tool program effectively determine the circle center through a three-point centering method.
10. Through setting up the suggestion alarm, can send the suggestion or report to the police when the testing result is unqualified. So as to control the dimensional tolerance of the parts in time and manage the quality of the parts.
11. Through setting up the controller, realize sending out the police dispatch newspaper or control drive unit shut down when the testing result is unqualified, under the support element is the partly condition of production line, can realize examining entirely to the product to in time stop the production line operation when the testing result is unqualified, avoid appearing the waste product.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a first embodiment of a dimensional tolerance inspection apparatus;
FIG. 2 is a schematic view of another embodiment of the tolerance detecting device;
FIG. 3 is a top view of the positioner;
FIG. 4 is a front view of the positioner;
FIG. 5 is a partial view taken from the direction A of FIG. 1;
FIG. 6 is a schematic diagram of part coordinate zone division;
FIG. 7 is a schematic diagram of an image received by a planar light receiver;
FIG. 8 is a schematic diagram of a distance detection tool routine detection method;
FIG. 9 is a schematic view of the arc segment radius detection utility and the aperture detection utility detection method;
FIG. 10 is a schematic view of a program inspection method for pitch detection tools;
FIG. 11 is a schematic top view of a second embodiment of a tolerance detecting device
FIG. 12 is a schematic front view of a second embodiment of a tolerance detecting device
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 5, a first embodiment of the device for detecting dimensional tolerance includes a planar light generator 1, a planar light generator support frame 2, a connecting fastener 3, a vertical rod 4, a bottom platform 5, a transparent substrate 6, a planar light receiver 7, a locator 8, a light shield 10, an elastic sealing ring 11, a computer loaded with a detection program, and a prompt alarm. Wherein, the plane light receiver 7 is horizontally arranged on the bottom platform 5, and the transparent substrate 6 is arranged above the plane light receiver 7; the plane light generator support frame 2 supports the plane light generator 1 and enables the plane light generator to be opposite to the plane light receiver horizontally and downwards; the vertical rod 5 is fixedly connected with the base platform 5 and is used for driving the planar light generator 1 to slide up and down by the planar light generator support frame 2. The connecting fastener 3 is used for fastening the vertical rod 5 and the planar light generator support frame 2. The transparent substrate 6 is parallel to the planar light receiver 7 and perpendicular to the light generated by the planar light generator 1.
The planar light generator 1 generates a light beam perpendicular to the light emitting plane, and the light beam perpendicular to the light emitting plane can be generated by the planar light conversion module by using the laser light generated by the laser light generator as a light source. By using a planar light generator, a more accurate projection can be obtained.
The transparent substrate 6 is provided with two mutually perpendicular outer side edges, and the positioner 8 comprises an L-shaped substrate positioning part 81 and an L-shaped part positioning part 82 which are fixedly connected with each other; the L-shaped substrate positioning portion 81 is provided with a substrate X-axis positioning inner side 811 and a substrate Y-axis positioning inner side 812 which are perpendicular to each other, for abutting against two outer sides of the transparent substrate which are perpendicular to each other, respectively. The L-shaped part positioning portion 82 is provided with a part X axis positioning inner side 821 and a part Y axis positioning inner side 822 perpendicular to each other for abutting against an outer edge surface of the part 9. The component 9 is placed on the transparent substrate 6. The positioner 8 is used for determining the origin of coordinates by taking the transparent substrate 6 as a reference, and standardizing the placing positions of the parts 9 on the transparent substrate 6, so that the processing of the part projection is more convenient and faster, and the introduction of more complex models and calculation is avoided.
The light shield 10 is fixedly connected to the lower end of the planar light generator 1; an elastic sealing ring 11 is arranged on the bottom platform 5 and surrounds the periphery of the plane light receiver 7. After the part 9 is placed in place, take away locator 8, unscrew connecting fastener 3, make planar light generator support frame 2 and planar light generator along pole setting 4 decline, until lens hood 10 and elastic sealing ring 11 butt, reach sealed effect. By adopting the light shield 10, the influence of external light on the projection precision is avoided.
And the computer loaded with the detection program is used for processing the image received by the planar light receiver and forming the part outline, and is also used for measuring the part outline, comparing the measured part outline with the manually set size and tolerance and outputting a comparison result.
The prompting alarm is controlled by the computer loaded with the detection program, and gives out a prompt or an alarm when the detection result is unqualified. Through setting up the suggestion alarm, can send suggestion or report to the police when the testing result is unqualified. So as to control the dimensional tolerance of the parts in time and manage the quality of the parts.
Fig. 6 to 10 show an embodiment of a method for detecting a dimensional tolerance using the dimensional tolerance detecting apparatus according to the first embodiment. The method comprises the following steps:
step 1: inputting the size to be measured and the tolerance value of the part into a computer detection program. In this embodiment, the dimension and tolerance values of the distance L, the dimension tolerance value of the arc radius R, the dimension tolerance value of the aperture D, and the dimension tolerance value of the pitch V are obtained.
Step 2: setting a mode that a part abuts against a positioning part of an L-shaped part of the positioner, wherein the intersection point of a straight line of the inner side edge of the X-axis positioning of the part of the positioning part of the L-shaped part of the positioner and a straight line of the inner side edge of the Y-axis positioning of the part is defined as the origin of a plane coordinate system;
and step 3: and determining a detection tool program called by each coordinate area in the plane coordinate system in the detection program according to the size to be detected of the part. In this embodiment, the detection tool routine for dividing and calling the coordinate region is shown in fig. 6. Setting a distance detection tool program called for the first coordinate area 21 and the second coordinate area 22, and setting the detection direction to be parallel to the X axis and the detection number to be 2; setting a program for calling an arc section radius detection tool for the third coordinate area 23, wherein the detection number is 1; setting a program for calling an aperture detection tool for the fourth coordinate area 24, wherein the detection number is 1; it is set that the pitch detection utility is invoked for the fifth coordinate area (overlapping with the fourth coordinate area 24) and the sixth coordinate area 25, and the number of detections is 1. The setting method can be input by numerical values or divided manually by drawing frames;
and 4, step 4: respectively abutting the inner side edge of the substrate X-axis positioning of the L-shaped substrate positioning part of the positioner and the inner side edge of the substrate Y-axis positioning against two mutually vertical outer side edges of the transparent substrate;
and 5: placing the part on a transparent substrate and abutting against the inner side edge of the X-axis positioning of the part and the inner side edge of the Y-axis positioning of the part of the L-shaped part positioning part of the positioner according to the abutting mode determined in the step 2;
step 6: removing the positioner;
and 7: controlling the planar light generator to emit light;
and 8: after receiving the image shown in fig. 7, the planar light receiver transmits the image to a computer detection program;
and step 9: and (3) processing the received image by a computer detection program to form a part outline, and calculating and storing coordinates of all pixel points on the outline on the plane coordinate system according to the position of the origin of the plane coordinate system determined in the step (2). The method for determining the contour of the part can be a black pixel point at a black-white junction.
Step 10: calling a corresponding detection tool program for detection in the coordinate area determined in the step 3 by the computer detection program to form an actual measurement size; in the present embodiment, the following substeps are included:
(1) Calling the distance detection utility for the first and second coordinate regions 21, 22 (see fig. 6 and 8):
step 3.12: selecting any point P1 on the contour line in the first coordinate area 21 as a first pixel point;
step 3.13: the first pixel point P1 is parallel to the X axis and intersects with the contour line in the second coordinate area 22 with the second pixel point P11;
step 3.14: calculating the pixel distance between the coordinates of the first pixel point P1 and the coordinates of the second pixel point P11, converting the pixel distance into a length unit distance L1, namely the measured distance, and storing the measured distance;
step 3.15: repeating step 3.12 to step 3.14:
step 3.12: selecting another arbitrary point P2 on the contour line in the first coordinate area 21 as a first pixel point;
step 3.13: the first pixel point P2 is parallel to the X axis and intersects with the contour line in the second coordinate area 22 with the second pixel point P22;
step 3.14: calculating the pixel distance between the coordinate of the first pixel point P2 and the coordinate of the second pixel point P22, converting the pixel distance into a length unit distance L2, namely the measured distance, and storing the measured distance;
step 3.15: the number of detections reaches 2 and the subroutine ends.
(2) The arc segment radius detection utility is invoked on the third coordinate area 23 (see fig. 6 and 9):
step 3.22: selecting any three points T1, T2 and T3 on the contour line in the third coordinate area 23;
step 3.23: obtaining a pixel coordinate equidistant to the three-point coordinate as a third pixel point T0;
step 3.24: selecting any point T4 on the contour line in the third coordinate area 23 as a fourth pixel point;
step 3.25: calculating the pixel distance between the coordinate of the third pixel point T0 and the coordinate of the fourth pixel point T4, converting the pixel distance into a length unit distance R1, namely the radius of the actually measured arc section, and storing the radius;
step 3.26: the number of detections reaches 1 and the subroutine ends.
(3) The aperture detection utility is invoked on the fourth coordinate area 24 (see fig. 6 and 9):
step 3.32: selecting any three points S1, S2 and S3 on the contour line in the fourth coordinate area 24;
step 3.33: solving a pixel coordinate equidistant to the three-point coordinate as a fifth pixel point S0;
step 3.34: selecting any point S4 on the contour line in the fourth coordinate area 24 as a sixth pixel point;
step 3.35: a fifth pixel point S0 and a sixth pixel point S4 are linearly intersected with another pixel point S5 in an outline line in a fourth coordinate area 24, and the intersection point S5 is a seventh pixel point;
step 3.36: calculating the pixel distance between the coordinates of the sixth pixel point S4 and the coordinates of the seventh pixel point S5, converting the pixel distance into a length unit distance, namely the actual measurement aperture and storing the actual measurement aperture;
step 3.37: the number of detections reaches 1 and the subroutine ends.
(4) The pitch detection utility is invoked for the fifth coordinate area (coinciding with the fourth coordinate area 24) and the sixth coordinate area 25 (see fig. 6 and 10):
step 3.42: selecting any three points on the contour line in the fifth coordinate region (coinciding with the fourth coordinate region 24);
step 3.43: solving a pixel coordinate equidistant from the three-point coordinates to be an eighth pixel point S0;
step 3.44: selecting any three points on the contour line in the sixth coordinate area 25;
step 3.45: solving a pixel coordinate equidistant to the three-point coordinate to be a ninth pixel point U0;
step 3.46: calculating the pixel distance between the S0 coordinate of the eighth pixel point and the U0 coordinate of the ninth pixel point, converting the pixel distance into a length unit distance V1, namely the actual measurement pitch is obtained and stored;
step 3.47: the number of detections reaches 1 and the subroutine ends.
Step 11: comparing the actual measurement size with the size to be measured and the tolerance value input in the step 1 by a computer detection program, wherein if the actual measurement size completely accords with the size to be measured and the tolerance value, the comparison result of the size to be measured is qualified; if all the rain comparison results of the ruler to be tested are qualified, the part to be tested is qualified; and if any one measured size does not accord with the measured size and the tolerance value, the measured part is unqualified.
Step 12: and after the computer detection program detects that the part to be detected is unqualified, the dimensional tolerance detection device sends out prompt alarm or controls the production line to stop running.
From the above, in the detection, by means of the manner of setting the part against the positioning part of the L-shaped part, the coordinate areas can be distinguished to call the detection tool program under the determined plane coordinate system. The detection tool program is called in each coordinate area to realize accurate measurement of the size to be measured, so that the pixel projection drawing can be processed very quickly and simply, and faster detection is realized. The distance detection tool performs detection in the set coordinate area, so that the distance detection method is simplified, and the detection efficiency is improved. The arc radius detection tool program, the aperture detection tool program and the pitch detection tool program effectively determine the circle center through a three-point centering method.
A second embodiment of the dimensional tolerance detection apparatus according to the present invention is shown in fig. 11 and 12. In the second embodiment, the dimensional tolerance detecting device includes a planar light generator 1, a planar light receiver 7, a transparent substrate 6, a positioner 8, a support unit 12, a driving unit 13, a computer loaded with a detection program, and a controller.
The supporting unit 12 is fixedly connected with the planar light generator 1 and the planar light receiver 7, and light rays emitted by the planar light generator 1 are vertical to a horizontal plane; the driving unit 13 is driven by a screw in this embodiment, and is used for driving the supporting unit 12 and driving the planar light generator 1 and the planar light receiver 2 thereon to move parallel with respect to the transparent substrate 6. The controller is controlled by the computer loaded with the detection program, and gives an alarm when the detection result is unqualified, and controls the driving unit to stop running if other instructions of the computer are not received within the time set by people after the alarm is given. Other aspects of the present embodiment are the same as those of the first embodiment. In this embodiment, the planar light generator 1 and the planar light receiver 7 are driven by the driving unit 13 to move in parallel with respect to the transparent substrate 6, so that the large-sized parts 9 can be scanned and detected. Through setting up the controller, realize sending out the police dispatch newspaper or control drive unit shut down when the testing result is unqualified, under the support element is the partly condition of production line, can realize examining entirely to the product to in time stop the production line operation when the testing result is unqualified, avoid appearing the waste product.
The above description describes the preferred embodiments of the present invention, but it should be understood that the present invention is not limited to the above embodiments, and should not be considered as excluding other embodiments. Modifications made by those skilled in the art in light of the teachings of this disclosure, which are well known or are within the skill and knowledge of the art, are also to be considered as within the scope of this invention.
Claims (14)
1. A dimensional tolerance detecting device, comprising: the device comprises a planar light generator, a planar light receiver, a transparent substrate, a positioner and a computer loaded with a detection program;
the planar light generator is arranged opposite to the planar light receiver, and a transparent substrate is arranged in the middle of the planar light generator; the transparent substrate is vertical to the light emitted by the planar light generator;
the transparent substrate is provided with at least two mutually vertical outer side edges;
the positioner comprises an L-shaped substrate positioning part and an L-shaped part positioning part which are fixedly connected with each other; the L-shaped substrate positioning part is provided with a substrate X-axis positioning inner side edge and a substrate Y-axis positioning inner side edge which are vertical to each other and are used for respectively abutting against two mutually vertical outer side edges of the transparent substrate; the L-shaped part positioning part is provided with a part X-axis positioning inner side edge and a part Y-axis positioning inner side edge which are vertical to each other and used for supporting the outer edge surface of the part;
the computer with the detection program is used for processing the image received by the planar light receiver and forming the part outline, and is also used for measuring the part outline, comparing the measured part outline with the manually set size and tolerance and outputting a comparison result.
2. A dimensional tolerance detecting apparatus according to claim 1, wherein: the device also comprises a bottom platform, a vertical rod and a plane light generator support frame;
the planar light receiver is horizontally arranged on the bottom platform, and the transparent substrate is arranged above the planar light receiver;
the planar light generator support frame is used for supporting the planar light generator to enable the planar light generator to be horizontally downward;
the vertical rod is fixedly connected with the base platform and is used for driving the planar light generator support frame to drive the planar light generator to slide up and down.
3. A dimensional tolerance sensing device according to claim 2, wherein: the light shield also comprises a light shield and an elastic sealing ring;
the light shield is fixedly connected to the lower end of the planar light generator;
the elastic sealing ring is arranged on the bottom table and surrounds the planar light receiver;
the planar light generator is driven to descend along the vertical rod, and the light shield is abutted to the elastic sealing ring.
4. A dimensional tolerance sensing device according to claim 1, wherein: the device also comprises a supporting unit and a driving unit;
the supporting unit is fixedly connected with the planar light generator and the planar light receiver;
the light generated by the planar light generator is vertical to the horizontal plane;
the driving unit is used for driving the supporting unit and driving the planar light generator and the planar light receiver on the supporting unit to move in parallel relative to the transparent substrate.
5. A dimensional tolerance detecting apparatus according to claim 1, wherein: the device also comprises a prompt alarm which is controlled by the computer loaded with the detection program and gives out a prompt or an alarm when the detection result is unqualified.
6. The apparatus as claimed in claim 4, further comprising a controller, wherein the controller is controlled by the computer loaded with the detection program, and issues an alarm or controls the driving unit to stop operating when the detection result is not qualified.
7. The apparatus as claimed in claim 6, wherein the controller controls the driving unit to stop the operation if the controller does not receive any other command from the computer within a time set by a human after the controller issues an alarm when the detection result is not qualified.
8. A method of detecting a dimensional tolerance using a dimensional tolerance detecting apparatus according to any one of claims 1 to 6, comprising the steps of:
step 1: inputting the size to be measured and the tolerance value of the part into a computer detection program;
step 2: setting a mode that a part abuts against a positioning part of an L-shaped part of the positioner, wherein the intersection point of a straight line of the inner side edge of the X-axis positioning of the part of the positioning part of the L-shaped part of the positioner and a straight line of the inner side edge of the Y-axis positioning of the part defines the origin of a plane coordinate system;
and step 3: determining a detection tool program called by each coordinate area in a plane coordinate system in a detection program according to the size to be detected of the part;
and 4, step 4: respectively abutting the inner side edge of the substrate X-axis positioning and the inner side edge of the substrate Y-axis positioning of the L-shaped substrate positioning part of the positioner against two mutually vertical outer side edges of the transparent substrate;
and 5: placing the part on a transparent substrate and abutting against the inner side edge of the X-axis positioning of the part and the inner side edge of the Y-axis positioning of the part of the L-shaped part positioning part of the positioner according to the abutting mode determined in the step (2);
and 6: removing the positioner;
and 7: controlling the planar light generator to emit light;
and 8: the planar light receiver receives the image and transmits the image to a computer detection program;
and step 9: processing the received image by a computer detection program to form a part outline, and calculating and storing coordinates of all pixel points on the outline on the plane coordinate system according to the position of the origin of the plane coordinate system determined in the step 2;
step 10: calling a corresponding detection tool program for detection in the coordinate area determined in the step 3 by the computer detection program to form an actual measurement size;
step 11: and (3) comparing the actually measured size with the size to be measured and the tolerance value input in the step (1) by the computer detection program, and outputting a comparison result.
9. A method of checking dimensional tolerances as claimed in claim 8, wherein: the detection tool program comprises a distance detection tool program; the distance detection tool program comprises the following steps:
step 3.11: providing an interface for a user to set a first coordinate area, a second coordinate area, a detection direction and a detection number; the detection direction is selected from a connecting line parallel to the X-axis direction or the Y-axis direction or between any two pixel coordinates;
step 3.12: selecting any point on the contour line in the first coordinate area as a first pixel point;
step 3.13: the first pixel point makes a straight line parallel to the detection direction and intersects with a contour line in the second coordinate area at the second pixel point;
step 3.14: calculating the pixel distance between the first pixel point coordinate and the second pixel point coordinate, converting the pixel distance into a length unit distance, namely the measured distance, and storing the measured distance;
step 3.15: and (5) repeating the steps from 3.12 to 3.14 until the number of the measured distances reaches the set detection number.
10. A method of detecting dimensional tolerances as claimed in claim 8, wherein: the detection tool program comprises an arc section radius detection tool program; the arc segment radius detection tool program comprises the following steps:
step 3.21: providing an interface for a user to set a third coordinate area and the detection number;
step 3.22: selecting any three points on the contour line in the third coordinate area;
step 3.23: obtaining a pixel coordinate equidistant to the three-point coordinate as a third pixel point;
step 3.24: selecting any point on the contour line in the third coordinate region as a fourth pixel point;
step 3.25: calculating the pixel distance between the coordinates of the third pixel point and the coordinates of the fourth pixel point, converting the pixel distance into a length unit distance, namely the radius of the actually measured arc section, and storing the distance;
step 3.26: and (5) repeating the steps from 3.22 to 3.25 until the number of the actually measured arc section radiuses reaches the set detection number.
11. A method of checking dimensional tolerances as claimed in claim 8, wherein: the detection tool program comprises an aperture detection tool program; the aperture detection tool program comprises the following steps:
step 3.31: providing an interface for a user to set a fourth coordinate area and the detection number;
step 3.32: selecting any three points on the contour line in the fourth coordinate area;
step 3.33: obtaining a pixel coordinate equidistant to the three-point coordinate as a fifth pixel point;
step 3.34: selecting any point on the contour line in the fourth coordinate area as a sixth pixel point;
step 3.35: making a straight line between the fifth pixel point and the sixth pixel point and intersecting a contour line in the fourth coordinate area with the other pixel point, wherein the intersection point is a seventh pixel point;
step 3.36: calculating the pixel distance between the coordinates of the sixth pixel point and the coordinates of the seventh pixel point, converting the pixel distance into a length unit distance, namely the actual measurement aperture and storing the actual measurement aperture;
step 3.37: and repeating the steps 3.32 to 3.36 until the number of the measured apertures reaches the set detection number.
12. A method of detecting dimensional tolerances as claimed in claim 8, wherein: the detection tool program comprises a pitch detection tool program; the pitch detection tool program comprises the following steps:
step 3.41: providing an interface for a user to set a fifth coordinate area, a sixth coordinate area and the measurement quantity;
step 3.42: selecting any three points on the contour line in the fifth coordinate area;
step 3.43: solving pixel coordinates equidistant from the three-point coordinates to be an eighth pixel point;
step 3.44: selecting any three points on the contour line in the sixth coordinate area;
step 3.45: obtaining a pixel coordinate equidistant to the three-point coordinate as a ninth pixel point;
step 3.46: calculating the pixel distance between the coordinates of the eighth pixel point and the coordinates of the ninth pixel point, converting the pixel distance into a length unit distance, namely the actual measurement hole distance, and storing the actual measurement hole distance;
step 3.47: and repeating the steps 3.42 to 3.46 until the number of the measured hole distances reaches the set detection number.
13. A method of detecting dimensional tolerances as claimed in claim 8, wherein: the computer test program compares the measured dimensions with the measured dimensions and tolerance values input in step 1 in the following manner: comparing the actual measurement size with the corresponding size to be measured and the tolerance value, wherein if the actual measurement size completely accords with the size to be measured and the tolerance value, the comparison result of the size to be measured is qualified; if all the comparison results of the sizes to be measured are qualified, the parts to be measured are qualified; and if any measured dimension does not accord with the measured dimension and the tolerance value, the part to be measured is unqualified.
14. A method of checking dimensional tolerances as claimed in claim 12, wherein: further comprising the step 12: and after the computer detection program detects that the part to be detected is unqualified, the dimensional tolerance detection device sends out prompt alarm or controls the production line to stop running.
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