Width measuring system

Abstract

The utility model relates to the technical field of precision measurement, in particular to a width measurement system, which comprises an illumination module, a width measurement module and a width measurement module, the imaging module is used for acquiring an image of the to-be-measured object; the image acquisition module is used for acquiring and converting the analog signal output by the imaging module; the image processing and width measuring module is used for analyzing and calculating the digital image data output by the image acquisition module to obtain width data of the object to be measured; the data storage module is used for storing calculation data of the image processing and width measuring module; the display module is in communication connection with the data storage module and is used for displaying the calculation result; the driving module is used for supporting the to-be-measured object and driving the to-be-measured object to move from the putting-in station to the measuring station; and the control execution module is in communication connection with the image processing and width measuring module and is used for controlling the movement of the to-be-measured object driving module according to the calculation result of the image processing and width measuring module.

Description

Technical Field

[0001] The present application relates to the field of precision measurement technology, and in particular to a width measurement system. Background Art

[0002] In industrial production, the dimensions of industrial parts need to be accurately measured, where the width between straight lines is an important parameter. The following problems are often encountered:

[0003] High-precision requirements: In some application scenarios, the width between straight lines needs to be measured with high precision. Traditional measurement methods may not meet this requirement, so a more accurate measurement solution needs to be found.

[0004] Non-contact measurement requirements: In some special scenarios, it is necessary to measure the width between straight lines, but traditional measurement methods require physical contact and are not suitable for certain objects or environments. Therefore, a non-contact measurement solution is needed.

[0005] There are some related technologies of industrial vision systems and measurement methods, but they have the following defects and disadvantages:

[0006] Traditional ruler or caliper measurement: This method requires physical contact with the object, cannot achieve non-contact measurement, and has limited accuracy. In addition, for objects with complex shapes, rulers or calipers may not be able to adapt to measurement needs.

[0007] Method based on traditional manual measurement: The width between straight lines of parts is manually measured by traditional instruments. Compared with this technology, the disadvantages are inaccurate measurement, low efficiency, possible subjective errors and time-consuming problems. It is not suitable for large-scale measurement tasks and automated production lines. Summary of the invention

[0008] The embodiment of the present application provides a width measurement system that can solve the above-mentioned technical problems.

[0009] The width measurement system provided in the embodiment of the present application includes:

[0010] The lighting module is used to provide a lighting source for the object to be tested.

[0011] The imaging module includes a lens and a camera, which is used to obtain an image of the object to be measured.

[0012] The image acquisition module is communicatively connected to the imaging module and is used to acquire and convert the analog signal output by the imaging module to obtain digital image data.

[0013] The image processing and width measurement module is communicatively connected to the image acquisition module and is used to analyze and calculate the digital image data output by the image acquisition module to obtain the width data of the object to be measured.

[0014] The data storage module is communicatively connected to the image processing and width measurement module and is used to store the calculated data of the image processing and width measurement module.

[0015] A display module is communicatively connected to the data storage module and is used to display the calculation results.

[0016] The drive module is used to support the object to be measured and drive the object to be measured to move from the placement station to the measurement station.

[0017] The control execution module is communicatively connected to the image processing and width measurement module, and is used to control the movement of the drive module of the object to be measured according to the calculation results of the image processing and width measurement module.

[0018] According to the aforementioned embodiment of the present application, the driving module includes a driving member, a transmission mechanism and a clamping mechanism.

[0019] The clamping mechanism is used to clamp the object to be measured.

[0020] The transmission mechanism includes a transmission chain and a mobile base connected to the transmission chain, and the clamping mechanism is fixed on the mobile base.

[0021] The driving member cooperates with the transmission chain to drive the transmission chain to drive the mobile base to move.

[0022] According to any of the aforementioned embodiments of the present application, the driving module further includes a grating ruler.

[0023] The extension direction of the grating ruler is the same as the moving direction of the moving base, and is used to measure the moving distance of the moving base.

[0024] According to any of the aforementioned embodiments of the present application, the clamping mechanism includes a V-shaped positioning block and a rotary clamping cylinder, and the V-shaped positioning block and the rotary clamping cylinder are both fixed on a mobile base.

[0025] The V-shaped positioning block is used to place the object to be measured, and the rotary clamping cylinder is used to clamp the object to be measured placed on the V-shaped positioning block.

[0026] According to any of the aforementioned embodiments of the present application, the width measurement system further includes a gate-shaped support frame, which includes a first support leg, a second support leg, and a crossbeam connecting the first support leg and the second support leg, and the crossbeam is located above the measuring station.

[0027] The lighting module and the image acquisition module are both arranged on the crossbeam.

[0028] According to any of the foregoing embodiments of the present application, the positions of the lighting module and the image acquisition module on the crossbeam are adjustable.

[0029] According to any of the aforementioned embodiments of the present application, the lighting module and the image acquisition module can rotate around the axis of the beam, and can also move along the extension direction of the beam.

[0030] According to any of the aforementioned embodiments of the present application, a first lighting installation component and a second lighting installation component are provided on the crossbeam, the first installation component is used to install the lighting module, and the second installation component is used to install the image acquisition module, and the first installation component and the second installation component have the same structure.

[0031] The first mounting assembly or the second mounting assembly comprises a first mounting ring and a second mounting ring. The first mounting ring is sleeved on the crossbeam and can slide along the crossbeam. The second mounting ring is sleeved on the outer periphery of the first mounting ring and can rotate relative to the first mounting ring.

[0032] The control execution module in the embodiment of the present application can realize fully automatic operation control according to the calculation results of the image processing and width measurement module, thereby improving the intelligence and automation level of the width measurement system; compared with the traditional method which requires manual measurement, the width measurement system in the embodiment of the present application realizes more accurate measurement of the width of the object to be measured, and has higher accuracy and reliability; the image acquisition module can collect and convert the video analog signal output by the camera into digital image data in real time, thereby improving the efficiency and accuracy of image processing; the data storage module can effectively store the processed data, which is convenient for subsequent analysis and query, and ensures the traceability and manageability of the data; the display module can output and display the processed data and features of interest in an intuitive manner, thereby providing a convenient data display and result presentation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a width measurement system according to an embodiment of the present application;

[0034] Figure 2 This is a schematic structural diagram of a driving module in a width measurement system according to an embodiment of the present application;

[0035] Figure 3 is a schematic structural diagram of a clamping mechanism in a width measurement system according to an embodiment of the present application;

[0036] Figure 4 is a schematic structural diagram of a door-shaped support frame in a width measurement system according to an embodiment of the present application;

[0037] Figure 5 It is a structural schematic diagram of the first installation component / the second installation component in the width measurement system of one embodiment of the present application. Implementation

[0038] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0039] See also Figure 1 An embodiment of the present application provides a width measurement system 100, including an illumination module 110, an imaging module 120, an image acquisition module 130, an image processing and width measurement module 140, a data storage module 150, a display module 160, a driving module 170 and a control execution module 180.

[0040] The lighting module 110 is used to provide a lighting source for the object to be tested. The lighting module 110 is an auxiliary imaging device that provides pre-lighting conditions for image acquisition and adjusts the lighting brightness. The purpose of the lighting unit is to provide generalized lighting for the object to be tested, illuminate the object to be tested, and highlight the contrast between the features to be tested of the object to be tested and the surrounding environment.

[0041] The imaging module 120 includes a lens and a camera, and is used to obtain an image of the object to be measured. The lens focuses the light reflected or blocked by the object to be measured on the target surface of the camera's image sensor to achieve light beam transformation, thereby obtaining a clear and distinctive image of the object to be measured. In the embodiment of the present application, the imaging module 120 uses a high-precision camera, which can capture clear images with extremely high resolution.

[0042] The image acquisition module 130 is communicatively connected to the imaging module 120, and is used to acquire and convert the analog signal output by the imaging module 120 to obtain digital image data. In the embodiment of the present application, the image acquisition module 130 is integrated on a high-precision camera, providing an interface between the image acquisition device (camera) and the image processing device (computer) in the machine vision system, and real-time acquisition and conversion of the video analog signal output by the camera. The high-precision camera can transmit the digitized image data to the image processing and width measurement module 140 at high speed through a bus at a high sampling rate and high resolution, and through a high-speed interface with a PC.

[0043] The image processing and width measurement module 140 is communicatively connected to the image acquisition module 130 , and is used to analyze and calculate the digital image data output by the image acquisition module 130 to obtain the width data of the object to be measured.

[0044] The data storage module 150 is communicatively connected to the image processing and width measurement module 140, and is used to store the calculated data of the image processing and width measurement module 140. For example, it can be a method based on pixel distance, which calculates the width between straight lines by the distance between pixel points; it can also be a method based on contour extraction, which calculates the width between straight lines by extracting the contour around the straight line, which has the advantage of being applicable to the measurement of straight lines of irregular shapes with high accuracy; it can also be a method based on template matching, which calculates the width between straight lines by matching the features of the straight line with a predefined template, which has the advantage of being applicable to the measurement of straight lines of complex scenes and shapes with high accuracy; or it can be a method based on edge detection, which measures the width between straight lines by detecting the edges of the straight line and calculating the distance between the edges, which has the advantage of being applicable to the measurement of straight lines of various shapes and angles.

[0045] The display module 160 is communicatively connected to the data storage module 150 and is used to display the calculation results. The display module 160 mainly includes a display and a front-end display software. According to the user's instructions, the data or features of interest extracted by the image processing and width measurement module 140 can be output and displayed on a display screen or other graphical interface, such as size, defect legend, etc.

[0046] The driving module 170 is used to support the object to be measured and drive the object to be measured to move from the placement station to the measurement station. When the object to be measured needs to be measured, the object to be measured is placed in the placement station, the driving module 170 drives the object to be measured to move to the measurement station, the lighting module 110 provides lighting to the object to be measured, and the imaging module 120 obtains an image of the object to be measured.

[0047] The control execution module 180 is communicatively connected to the image processing and width measurement module 140 , and is used to control the movement of the object driving module 170 according to the calculation result of the image processing and width measurement module 140 .

[0048] In the embodiment of the present application, the control execution module 180 can realize fully automatic operation control according to the calculation results of the image processing and width measurement module 140, thereby improving the intelligence and automation level of the width measurement system 100; compared with the traditional method which requires manual measurement, the width measurement system 100 of the embodiment of the present application realizes more accurate measurement of the width of the object to be measured, and has higher accuracy and reliability; the image acquisition module 130 can collect and convert the video analog signal output by the camera into digital image data in real time, thereby improving the efficiency and accuracy of image processing; the data storage module 150 can effectively store the processed data, which is convenient for subsequent analysis and query, and ensures the traceability and manageability of the data; the display module 160 can output and display the processed data and features of interest in an intuitive manner, thereby providing a convenient data display and result presentation method.

[0049] In some embodiments, see Figure 2 The driving module 170 includes a driving member 171, a transmission mechanism and a clamping mechanism 173. The clamping mechanism 173 is used to clamp the object to be measured. When measurement is required, the object to be measured is clamped on the clamping mechanism 173; the transmission mechanism includes a transmission chain 1721 and a mobile base 1722 connected to the transmission chain 1721. The clamping mechanism 173 is fixed on the mobile base 1722. The movement of the transmission chain 1721 can drive the mobile base 1722 to move; the driving member 171 is in transmission cooperation with the transmission chain 1721, and is used to drive the transmission chain 1721 to drive the mobile base 1722 to move. The driving member 171 has a sprocket 1711 that cooperates with the transmission chain 1721. The rotation of the sprocket 1711 can drive the transmission chain 1721 to move.

[0050] In some embodiments, in order to enable the mobile base 1722 to move along a predetermined route, the driving module 170 also includes a guide rail 174, and the mobile base 1722 slides with the guide rail 174; a long strip-shaped groove is provided in the middle of the guide rail 174 and along the extension direction of the guide rail 174, and the transmission chain 1721 is embedded in the groove.

[0051] In some embodiments, in order to determine the moving distance of the mobile base 1722, the driving module 170 further includes a grating ruler, the extension direction of which is the same as the moving direction of the mobile base 1722, and is used to measure the moving distance of the mobile base 1722. By reading the position data of the mobile base 1722 before and after the movement relative to the grating ruler, the moving distance of the mobile base 1722 can be calculated.

[0052] In some embodiments, the clamping mechanism 173 includes a V-shaped positioning block 1731 and a rotating clamping cylinder 1732; the V-shaped positioning block 1731 and the rotating clamping cylinder 1732 are both fixed on the mobile base 1722; the V-shaped positioning block 1731 has a V-shaped groove, and when measurement is required, the object to be measured is placed in the V-shaped groove, and the rotating clamping cylinder 1732 is used to clamp the object to be measured placed on the V-shaped positioning block 1731. In this way, the object to be measured can be fixed to avoid affecting the measurement accuracy due to the movement of the object to be measured.

[0053] In some embodiments, in order to facilitate the fixing of the lighting module 110 and the image acquisition module 130, the width measurement system 100 further includes a gate-shaped support frame 190, the gate-shaped support frame 190 includes a first support leg 191, a second support leg 192, and a crossbeam 193 connecting the first support leg 191 and the second support leg 192, the crossbeam 193 is located above the measurement station, and the lighting module 110 and the image acquisition module 130 are both arranged on the crossbeam 193. When measurement is required, the driving module 170 is used to transport the object to be measured to the measurement station below the scale, the lighting module 110 provides a lighting source, and the image acquisition module 130 obtains image information of the object to be measured.

[0054] In some embodiments, in order to adjust the lighting module 110 and the image acquisition module 130 so that the lighting module 110 and the image acquisition module 130 are located at an ideal position, the position of the lighting module 110 and the image acquisition module 130 on the crossbeam 193 is adjustable. Specifically, the lighting module 110 and the image acquisition module 130 can rotate around the axis of the crossbeam 193, or move along the extension direction of the crossbeam 193.

[0055] In some embodiments, a first lighting installation component 194 and a second lighting installation component 195 are provided on the crossbeam 193. The first lighting installation component 194 is used to install the lighting module 110, and the second lighting installation component 195 is used to install the image acquisition module 130. The first lighting installation component 194 and the second lighting installation component 195 have the same structure. The first lighting installation component 194 or the second lighting installation component 195 includes a first lighting ring C1 and a second lighting ring C2. The first lighting ring C1 is sleeved on the crossbeam 193 and can slide along the crossbeam 193. The second lighting ring C2 is sleeved on the outer periphery of the first lighting ring C1 and can rotate relative to the first lighting ring C1. In the embodiment of the present application, the inner hole shape of the first lighting ring C1 matches the cross-sectional shape of the crossbeam 193, and the outer peripheral surface is circular. The inner control shape of the second lighting ring C2 is a circle that matches the outer peripheral surface shape of the first lighting ring C1. The first mounting ring and the second mounting ring can be fixed relative to each other by screws. For example, a threaded hole is drilled on the side wall of the second mounting ring, and a screw is screwed into the threaded hole to tighten the first mounting ring, so that the first mounting ring and the second mounting ring can be fixed relative to each other. The lighting module 110 and the image acquisition module 130 can be fixed by snap-fitting.

Claims

1. A width measurement system, Features: include The lighting module is used to provide a lighting source for the object to be tested. The imaging module includes a lens and a camera, which is used to obtain an image of the object to be measured. An image acquisition module is communicatively connected to the imaging module and is used to acquire and convert the analog signal output by the imaging module to obtain digital image data. The image processing and width measurement module is communicatively connected to the image acquisition module and is used to analyze and calculate the digital image data output by the image acquisition module to obtain the width data of the object to be measured. a data storage module, which is communicatively connected to the image processing and width measurement module and is used to store the calculated data of the image processing and width measurement module; a display module, communicatively connected to the data storage module, for displaying the calculation results, The drive module is used to support the object to be measured and drive the object to be measured to move from the placement station to the measurement station. A control execution module is communicatively connected to the image processing and width measurement module, and is used to control the movement of the object to be measured driving module according to the calculation results of the image processing and width measurement module.

2. The width measurement system according to claim 1, Features: The driving module includes a driving member, a transmission mechanism and a clamping mechanism. The clamping mechanism is used to clamp the object to be measured. The transmission mechanism comprises a transmission chain and a movable base connected to the transmission chain, and the clamping mechanism is fixed on the movable base. The driving member cooperates with the transmission chain to drive the transmission chain to drive the mobile base to move.

3. The width measuring system according to claim 2, Features: The driving module also includes a grating ruler, The extension direction of the grating ruler is the same as the moving direction of the moving base, and is used to measure the moving distance of the moving base.

4. The width measuring system according to claim 2, Features: The clamping mechanism comprises a V-shaped positioning block and a rotating clamping cylinder, and the V-shaped positioning block and the rotating clamping cylinder are both fixed on the moving base. The V-shaped positioning block is used to place the object to be measured, and the rotary clamping cylinder is used to clamp the object to be measured placed on the V-shaped positioning block.

5. The width measurement system according to claim 1, Features: It also includes a gate-shaped support frame, which includes a first support leg, a second support leg and a crossbeam connecting the first support leg and the second support leg. The crossbeam is located above the measuring station, and the lighting module and the image acquisition module are both arranged on the crossbeam.

6. The width measuring system according to claim 5, Features: The positions of the lighting module and the image acquisition module on the crossbeam are adjustable.

7. The width measuring system according to claim 6, Features: The lighting module and the image acquisition module can rotate around the axis of the beam, and can also move along the extension direction of the beam.

8. The width measuring system according to claim 7, Features: The beam is provided with a first lighting installation component and a second lighting installation component, wherein the first installation component is used to install the lighting module, and the second installation component is used to install the image acquisition module, and the first installation component and the second installation component have the same structure. The first mounting assembly or the second mounting assembly includes a first mounting ring and a second mounting ring. The first mounting ring is sleeved on the crossbeam and can slide along the crossbeam. The second mounting ring is sleeved on the outer circumference of the first mounting ring and can rotate relative to the first mounting ring.

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