Device for detecting thickness of sheet

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By using a smart camera and light source in a dark room box to convert slight height changes into horizontal displacement, combined with the conveying system, the deformation and damage of soft materials by contact measurement is solved, and accurate non-contact measurement and continuous detection of sheet thickness are achieved , reducing quality risks.

CN222353107UActive Publication Date: 2025-01-14HUAQING COLLEGE OF XIAN UNIV OF ARCHITECTURE & TECH

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Patent Information

Application Number: CN202421271480.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-04
Publication Date: 2025-01-14
Estimated Expiration: 2034-06-04

AI Technical Summary

Technical Problem

In the prior art, contact measurements are prone to deformation and damage to soft or brittle materials, resulting in inaccurate measurements or quality risks, and lack of continuous inspection and sorting of each product.

Method used

A device including a dark room box, a smart camera and a light source is designed to measure thickness by using spot displacement through a non-contact manner, and combine it with a conveying system to achieve continuous measurement to ensure measurement accuracy and material safety.

Benefits of technology

Non-contact measurement of flexible or vulnerable materials is achieved, which ensures measurement accuracy and material integrity, reduces quality risks, and supports continuous inspection and sorting of each product.

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Abstract

The utility model discloses a device for detecting the thickness of a sheet, belongs to the technical field of measurement, and adopts an intelligent camera and a light source to convert tiny height change which is not easy to measure into amplified horizontal displacement change which is easy to measure. The non-contact measurement of the flexible or vulnerable measured material is realized, the measurement precision is ensured, and the measured material is not damaged. A conveying system is adopted for cooperation, continuous measurement can be achieved, an intelligent camera is adopted for obtaining a measurement result, data precision is guaranteed, whether the materials are qualified or not is judged according to the measurement result, qualified products are guided to be released, and defective products are removed, and the problems that in contact measurement in the prior art, due to deformation of the measured materials, measurement is inaccurate, and measurement accuracy is high are solved. The technical problem that the measured material is damaged due to the pressure during contact measurement is solved, continuous work of the conveying system can further realize continuous measurement of each product in the production process, and potential quality risks are reduced.

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Description

Technical Field

[0001] The utility model belongs to the technical field of measurement, and in particular relates to a device for detecting the thickness of a thin sheet. Background Art

[0002] In industrial production, each material needs to be measured and can only be assembled into the product after passing the measurement. For materials with high hardness such as metals and ceramics, an economical and reliable contact measurement system can be used for measurement.

[0003] In the existing technology, for soft or brittle materials such as rubber, polymers, and powder pressed products, contact measurement may cause inaccurate measurement due to deformation of the measured material, or damage the measured material due to pressure during contact measurement. The common practice in the industry is to conduct batch sampling or regular sampling of materials. The production process does not measure, test, and sort each product, which poses a potential quality risk. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the prior art and provide a device for detecting the thickness of a thin sheet to solve the technical problems in the prior art that contact measurement may cause inaccurate measurement due to deformation of the measured material, or damage the measured material due to pressure during contact measurement.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for detecting the thickness of a thin sheet comprises a darkroom box, a conveying system is arranged below the darkroom box, a tooling fixture for fixing the material to be tested is arranged on the conveying system, a smart camera is arranged on the top of the darkroom box, and a light source is arranged on the inner wall of the darkroom box.

[0007] Preferably, an inlet and an outlet are respectively provided on two opposite side walls of the darkroom box for inputting or outputting the material to be tested into or out of the darkroom box.

[0008] Preferably, the conveying system comprises a driving wheel, a driven wheel and a conveyor belt, the conveyor belt is arranged on the driving wheel and the driven wheel, and the driving wheel is connected to the motor.

[0009] Preferably, the fixture is a fixed tray, the bottom of which is fixed on the conveying system, and the material to be tested is arranged in the fixed tray and moves with the fixed tray.

[0010] Preferably, the material to be tested is one or more fragile thin sheets of material.

[0011] Preferably, the light source is a light source with an “I”-shaped light spot.

[0012] Preferably, the light source is installed at an angle such that the angle between the output light and the conveying system is 15°-60°.

[0013] Preferably, during measurement, the fixture supporting the material to be measured is located directly below the smart camera.

[0014] Preferably, during measurement, the camera field of view of the smart camera is perpendicular to the upper surface of the material to be measured.

[0015] Preferably, the smart camera is also connected to a host computer for automatically detecting the position of the light spot.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The present application discloses a device for detecting the thickness of a thin sheet, which uses a smart camera and a light source to convert tiny height changes that are difficult to measure into magnified horizontal displacement changes that are easy to measure. It realizes non-contact measurement of flexible or fragile materials to be measured, ensures measurement accuracy, and does not damage the materials to be measured. With the cooperation of a conveying system, continuous and uninterrupted measurement can be achieved, and a smart camera is used to obtain measurement results to ensure data accuracy. The qualification of the material is determined based on the measurement results, and qualified products are released and defective products are rejected. This solves the technical problems in the prior art that contact measurement may cause inaccurate measurement due to deformation of the measured material, or damage to the measured material due to pressure during contact measurement. The continuous operation of the conveying system can realize continuous measurement of each product in the production process, reducing potential quality risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the change of the light spot position of the measured materials with different thicknesses according to the utility model;

[0021] Figure 3 It is a side view of the darkroom box of the utility model.

[0022] Among them: 1-darkroom box; 2-conveying system; 3-tooling fixture; 4-material to be tested; 5-light source; 6-smart camera; 7-standard thickness spot; 8-low thickness spot; 9-high thickness spot. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] The utility model is further described in detail below with reference to the accompanying drawings:

[0030] See also Figure 1 The present application discloses a device for detecting the thickness of a thin sheet, comprising a darkroom box 1, a conveying system 2 is arranged below the darkroom box 1, a fixture 3 for fixing a material to be tested 4 is arranged on the conveying system 2, a smart camera 6 is arranged at the top of the darkroom box 1, and a light source 5 is arranged on the inner wall of the darkroom box 1; the smart camera 6 and the light source 5 are used to convert a small height change that is difficult to measure into an enlarged horizontal displacement change that is easy to measure. The non-contact measurement of the flexible or fragile material 4 to be tested is realized, the measurement accuracy is guaranteed, and the material to be tested is not damaged. The conveying system 2 is used to cooperate to realize continuous and uninterrupted measurement, and the smart camera 6 is used to obtain the measurement results to ensure data accuracy. The material is determined to be qualified or not according to the measurement results, and the qualified products are released and the defective products are eliminated. The technical problem that the contact measurement in the prior art may cause inaccurate measurement due to the deformation of the material to be tested, or the pressure during the contact measurement may cause damage to the material to be tested. The continuous operation of the conveying system can realize continuous measurement of each product in the production process, reducing potential quality risks.

[0031] In some embodiments, a device for detecting the thickness of a thin sheet is provided with a conveying system 2 for conveying the material to be measured 4 into a darkroom box 1 for measurement, or conveying the material to be measured 4 to the next process after the measurement is completed. A darkroom box 1 is provided above the conveying system 2 to provide a darkroom environment for the entire measuring device to prevent interference from external visible light. A fixture 3 is fixed on the conveying system 2 and moves with the conveying system 2. Its main function is to place and position the material to prevent excessive deviation in the positioning position of the material. One or more pieces of fragile thin sheet materials are placed in front of the entrance outside the darkroom box; a light source 5 with a "one"-shaped light spot is installed in the darkroom box to provide a light source for the measurement system, irradiating the surface of the material to be measured 4 to form a "one"-shaped light spot. The installation angle is 15°-60° with the angle between the conveyor belt and the conveyor belt, so that thin sheets of different thicknesses have enough light spot displacements. An intelligent camera 6 is vertically installed above the fixture 3, and the camera field of view is perpendicular to the upper surface of the material 4 to be tested. It is used to detect the position of the "I"-shaped light spot and display the detection result. The thickness of the material 4 to be tested can be determined based on the detection result displayed by the intelligent camera 6.

[0032] In some embodiments, see Figure 3 The two opposite side walls of the darkroom box 1 are respectively provided with an inlet and an outlet for inputting or outputting the material 4 to be tested into or out of the darkroom box 1, which is conducive to achieving measurement continuity.

[0033] In some embodiments, the conveying system 2 includes a driving wheel, a driven wheel and a conveyor belt. The conveyor belt is arranged on the driving wheel and the driven wheel. The driving wheel is connected to the motor to drive the motor driving wheel to rotate, and then drive the conveyor belt to move, which is conducive to continuously sending the material 4 to be tested into or out of the darkroom box 1 to achieve continuity of measurement.

[0034] In some embodiments, the fixture 3 is a fixed tray, the bottom of which is fixed on the conveying system 2, and the material 4 to be tested is arranged in the fixed tray and moves with the fixed tray. The fixed tray fixes and supports the material 4 to be tested without damaging the material 4 to be tested.

[0035] In some embodiments, the material to be tested 4 is one or more pieces of fragile thin sheets of material.

[0036] In some embodiments, the light source 5 is a light source with an "I"-shaped light spot, which cooperates with the smart camera 6 to convert the difficult-to-measure height change into an amplified and easily-measured horizontal displacement change, thereby realizing non-contact measurement of flexible or fragile materials.

[0037] In some embodiments, the light source 5 is installed at an angle of 15°-60° between the output light and the conveying system 2, so that there are enough light spot displacements for sheets of different thicknesses.

[0038] In some embodiments, a device for detecting the thickness of a thin sheet mainly includes six parts: a darkroom box 1, a conveying system 2, a fixture 3, a material to be measured 4, a light source 5 and a smart camera 6. The darkroom box 1 provides a darkroom environment for the entire measuring device to prevent interference from external visible light; the conveying system 2 is used to convey the material to be measured 4 into the darkroom box 1 for measurement, or to convey the material to be measured 4 to the next process after the measurement is completed; the fixture 3 is placed on the conveying system 2 and moves with the conveying system 2. Its main function is to place and position the fixed material to prevent the material positioning position from deviating too much. Large; the material to be measured 4 is one or more fragile thin sheets; the light source 5 provides a light source for the measuring system, irradiating the surface of the material to be measured 4 to form a "straight" light spot; the smart camera 6 is used to detect the position of the light spot, and the smart camera 6 is also connected to the host computer and transmits the detection results to the control system of the host computer; the control system controls the entry and exit, start and stop, and photo taking actions of the entire measuring system, communicates with the smart camera, obtains the camera result calculation, makes a judgment, controls the subsequent equipment to pass qualified materials, or removes unqualified materials, and transmits the measurement data to the manufacturing execution system (MES). Through the application of the thin sheet thickness measuring device provided by the utility model, the automatic full inspection of materials and the traceability of measurement data can be completed.

[0039] [Example]

[0040] like Figure 1As shown, a device for detecting the thickness of a sheet includes a darkroom box 1, a conveying system 2, a fixture 3, a material to be measured 4, a light source 5, and an intelligent camera 6. The fixture 3, the material to be measured 4, the light source 5, and the intelligent camera 6 are installed inside the darkroom box 1.

[0041] Furthermore, the angle between the light source 5 and the plane of the conveying system 2 is between 15° and 60°, so that sheets of different thicknesses can have enough light spot displacements.

[0042] Furthermore, the light source 5 irradiates the material 4 to be tested, forming a “I”-shaped light spot.

[0043] For the tested materials 4 of different thicknesses, the position of the “I”-shaped light spot will change significantly.

[0044] Set the light and dark position tool of the smart camera 6 to obtain the change point from light to dark or from dark to light, and then you can get the coordinate point position.

[0045] when Figure 1 When the thickness of the material 4 is appropriate, the Figure 2 The standard thickness spot 7 in Figure 1 When the thickness of the material 4 is too low, the Figure 2 The thickness of the spot is too low 8; when Figure 1 When the thickness of the material 4 is too high, the Figure 2 The thickness in the spot 9 is too high.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for detecting the thickness of a sheet, characterized in that: It includes a darkroom box (1). A conveying system (2) is arranged below the darkroom box (1). A tooling fixture (3) for fixing the material to be measured (4) is arranged on the conveying system (2). An intelligent camera (6) is arranged at the top inside the darkroom box (1), and a light source (5) is arranged on the inner side wall of the darkroom box (1).

2. A device for detecting the thickness of a sheet according to claim 1, characterized in that: On two opposite side walls of the darkroom box (1), an inlet and an outlet are respectively provided for the material to be measured (4) to enter or exit the darkroom box (1).

3. The device for detecting the thickness of a sheet according to claim 1, characterized in that: The conveying system (2) includes a driving wheel, a driven wheel and a conveyor belt. The conveyor belt is arranged on the driving wheel and the driven wheel, and the driving wheel is connected to a motor.

4. The device for detecting the thickness of a sheet according to claim 1, characterized in that: The tooling fixture (3) is a fixed supporting tray. The bottom of the fixed supporting tray is fixed on the conveying system (2). The material to be measured (4) is arranged in the fixed supporting tray and moves along with the fixed supporting tray.

5. The device for detecting the thickness of a sheet according to claim 1, characterized in that: The material to be measured (4) is one or more fragile thin sheet materials.

6. The device for detecting the thickness of a sheet according to claim 1, characterized in that: The light source (5) is a light source with a "one"-shaped light spot.

7. The device for detecting the thickness of a sheet according to claim 1, characterized in that: The installation angle of the light source (5) is such that the angle between the output light and the conveying system (2) is 15° - 60°.

8. The device for detecting the thickness of a sheet according to claim 1, characterized in that: During measurement, the tooling fixture (3) supports the material to be measured (4) directly below the intelligent camera (6).

9. The device for detecting the thickness of a sheet according to claim 1, characterized in that: During measurement, the camera field of view of the intelligent camera (6) is perpendicular to the upper surface of the material to be measured (4).

10. The device for detecting the thickness of a sheet according to claim 1, characterized in that: The intelligent camera (6) is also connected to a host computer for automatically detecting the position of the light spot.