CN104613870A - Device for measuring position of metal bar in transparent material based on image recognition principle - Google Patents

Abstract

The invention relates to a device for measuring the position of a metal rod in a transparent material based on the principle of image recognition. The measuring device can inspect components of a concrete steel bar detector based on the principle of electromagnetic induction. The development of this measurement device is divided into the operating system part and the auxiliary system part. The development process of the operating system part is as follows: a) Operating platform bracket: VIS shock-isolated optical platform bracket is used to ensure the level of the table; b) Optical flat panel: it is made of aluminum alloy; c) Grating scale: it is measured by non-contact grating system, with an accuracy of up to 1 μm; d) slide rail: adopts a popular electronically controlled translation stage; e) connecting plate: used to connect the loading plate and grating ruler reading head of a popular electronically controlled translation stage, and at the same time as a new loading platform; f) fixed test component standard parts: according to the size of the test component, design M6 threaded holes at both ends of the connecting plate, and use nuts to fix the components on the new stage; h) Parallel light source: use LED light source. Auxiliary system part: The auxiliary system mainly includes stereo microscope, industrial camera, image processing software and computer.

Description

A device for measuring the position of metal rods in transparent materials based on the principle of image recognition

technical field

The invention belongs to the field of measurement, in particular to a device for measuring the position of a metal rod in a transparent material based on the principle of image recognition.

Background technique

At present, the transportation industry has not established an inspection method for concrete steel bar detectors, and the quality of the measurement results of such instruments cannot be guaranteed. The measuring device is an essential part of the test method. According to the industrial metrology management layout, local professional metrology stations use concrete steel bar detectors to inspect components to test the measurement results of concrete steel bar detectors. A metal rod position measuring device in a transparent material based on the principle of image recognition is used to test a concrete steel bar detector test component based on the principle of electromagnetic induction.

Contents of the invention

In order to solve the above problems, the present invention provides a device for measuring the position of a metal rod in a transparent material based on the principle of image recognition. The test accuracy is high and the verification/calibration method is simple, which can solve the problem of value transfer and traceability of the test components of the concrete steel bar detector.

A device for measuring the position of a metal rod in a transparent material based on the principle of image recognition provides an effective and reliable method for the inspection of a concrete steel bar detector inspection component based on the principle of electromagnetic induction. It is characterized in that it adopts the testing device of "stereo microscope magnification-industrial camera imaging-image processing software recognition-grating scale data collection". The components of the device are shock-isolated optical platform support (1), optical flat plate (2), grating ruler (3), grating ruler reading head (4), grating ruler fixing part (5), fixed inspection component standard part (6 ), connection plate (7), stereo microscope (8), industrial camera (9), parallel light source (10), slide rail (11), industrial camera data cable (12), grating scale reading table data cable (13) , grating ruler reading table (14) and computer and image processing software (15).

Among them, the vibration-isolation optical platform bracket (1) adopts the VIS vibration-isolation optical platform bracket, with a height of 100mm and an adjustable range of +30mm to -10mm. It is used to carry the operating platform, and the height is adjustable to ensure that the table is horizontal and vertical.

The optical plate (2) is made of aluminum alloy, the design length, width and thickness are 450mm×300mm×13mm, the surface is anodized, the platform roughness is 0.8～1.6μm, and the platform flatness is 0.02～0.05mm/ ^m2 . It is used as an operation platform and guaranteed flat surface.

The slide rail (11) adopts a popular electric control translation platform with a moving range of 100mm, which can ensure that the moving direction of the object is constant.

The grating ruler fixing part (5) is made of aluminum alloy, the surface is anodized, the roughness of the platform is 0.8-1.6μm, and the flatness of the platform is 0.02-0.05mm/ ^m2 , and it is used to fix the grating ruler (3) to the slide rail (11) side.

The connecting plate (7) is made of aluminum alloy, the surface is anodized, the roughness of the platform is 0.8-1.6 μm, the flatness of the platform is 0.02-0.05mm/ ^m2 , and it is used to connect the reading head of the grating scale (4) and the slide rail (11). object stage, as a new stage at the same time.

The parallel light source (10) adopts an LED light source, and the parallel light can ensure that the light is vertically irradiated on the inspection component of the concrete steel bar detector based on the principle of electromagnetic induction, without refraction and diffraction, and accurate measurement.

The fabrication process of the measuring device is as follows:

a) Put the optical plate (2) on the VIS shock-isolation optical platform support (1), adjust the support, observe the air bubbles, and make the optical plate level;

b) Fix the slide rail (11) on the optical plate (2) with M6 screws, then attach the grating ruler (3) to the side of the slide rail (11) and fix it on the slide rail with the grating ruler fixing piece (5) and M6 screws (11) on the side;

c) Fix the grating ruler reading head (4) on the side of the slide rail (11) stage, and then connect the grating ruler reading head (4) to the grating ruler reading meter (14) with the grating ruler reading meter data cable (13) ;

d) Connect the stage of the slide rail to the connecting plate (7) with M6 screws;

e) Put the parallel light source (10) on the optical flat panel (2) and under the output of the connecting plate (7);

f) Put the operating system part under the auxiliary system part, and the auxiliary system is composed of a stereo microscope (8), an industrial camera (9) and a computer and image processing software (15).

Description of drawings

Fig. 1 is a device for measuring the position of a metal rod in a transparent material based on the principle of image recognition according to the present invention.

Fig. 2 is a front view of the device for measuring the position of a metal rod in a transparent material based on the principle of image recognition according to the present invention.

Fig. 3 is a rear view of the device for measuring the position of a metal rod in a transparent material based on the principle of image recognition according to the present invention.

In the figure: 1. Shock-isolated optical platform bracket 2. Optical flat plate 3. Grating ruler 4. Grating ruler reading head 5. Grating ruler fixing part 6. Fixed inspection component standard part 7. Connecting plate 8. Stereo microscope 9. Industrial camera 10. Parallel light source 11. Slide rail 12. Industrial camera data line 13. Grating scale reading table data line 14. Grating scale reading table 15. Computer and image processing software

Detailed ways

Place the inspection component of the concrete steel bar detector based on the principle of electromagnetic induction on the connecting plate (7) of the metal rod position measurement device in the transparent material based on the principle of image recognition, fix it with the standard part (6) of the fixed inspection component, and open the stereoscopic Microscope (8), industrial camera (9), parallel light source (10), grating ruler reading table (14), computer and image processing software (15), find the test boundary according to the steps of selecting the objective lens and adjusting the magnification of the eyepiece, and use The test boundary is clear, then move the slide rail (11) so that the imaged measurement boundary in the image processing software coincides with the cursor, then start counting with the grating ruler reading table (14), continue to move the slide rail (11) to another test boundary and stop immediately Move the slide rail (11) and read the data.

Claims (10)

1. one kind based on metal bar position-measurement device in the transparent material of image recognition principle, being a kind of method for measuring a kind of concrete reinforcement detection instrument based on electromagnetic induction principle inspection component, it is characterized in that: adopt " stereomicroscope amplifies---industrial camera imaging---image processing software identification---grating scale image data " and measurement mechanism.

2. according to claim 1 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that, the component that this device adopts and instrument comprise: shock insulation optical table support (1), optical flat (2), grating scale (3), grating ruler reading head (4), grating scale fixture (5), fixed inspection component standard part (6), web joint (7), stereomicroscope (8), industrial camera (9), source of parallel light (10), slide rail (11), industrial camera data line (12), grating scale read table data line (13), grating scale read table (14) and computer and image processing software (15).

3. according to claim 2 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that: shock insulation optical table support (1) adopts VIS shock insulation optical table support, height 100mm, adjustable extent+30mm ~-10mm, for carrying operating platform, height adjustable, ensures that table-surface level is with vertical.

4. according to claim 2 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that: optical flat (2) adopts aluminum alloy material, design length and width are thick is 450mm × 300mm × 13mm, surface anodization, platform roughness 0.8 ~ 1.6 μm, platform plane degree 0.02 ~ 0.05mm/m ², for doing operating platform and ensureing surfacing.

5. according to claim 2 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that: slide rail (11) adopts popular electronic control translation stage, moving range 100mm, can ensure that the direction of motion of object is constant.

6. according to claim 2 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that: grating scale fixture (5) adopts aluminum alloy material, surface anodization, platform roughness 0.8 ~ 1.6 μm, platform plane degree 0.02 ~ 0.05mm/m ², make grating scale be fixed on slide rail side.

7. according to claim 2 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that: when grating scale read table (14) resolution is adjusted to 5 μm, grating scale (3) precision is 1 μm.

8. according to claim 2 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that: web joint (7) adopts aluminum alloy material, surface anodization, platform roughness 0.8 ~ 1.6 μm, platform plane degree 0.02 ~ 0.05mm/m ², for connecting grating ruler reading head and slide rail objective table, simultaneously as new objective table.

9. according to claim 2 a kind of based on metal bar position-measurement device in the transparent material of image recognition principle, it is characterized in that, source of parallel light (10) adopts LED light source, light ray parallel can ensure that light vertically impinges upon on concrete reinforcement detection instrument inspection component, without refraction and diffraction, measure precisely.

10. the manufacturing process based on metal bar position-measurement device in the transparent material of image recognition principle as described in any one of claim 1-9, is characterized in that manufacturing process is as follows:

A) optical flat (2) is placed on VIS shock insulation optical table support (1), adjusting pole, observes bubble, make optical flat level;

B) slide rail (11) M6 screw is fixed on optical flat (2), then grating scale (3) is close to slide rail (11) side grating scale fixture (5) and M6 screw is fixed on slide rail (11) side;

C) grating ruler reading head (4) is fixed on slide rail (11) objective table side, then grating ruler reading head (4) is connected with grating scale read table (14) grating scale read table data line (13);

D) objective table of slide rail M6 screw is connected with web joint (7);

E) source of parallel light (10) is put on optical flat (2) and the below of paying at web joint (7);

F), under operating system part being put into backup system part, backup system is made up of stereomicroscope (8), industrial camera (9) and computer and image processing software (15).