High-precision measuring tool

Abstract

The utility model discloses a high-precision measuring tool, which comprises a fixed seat, a weight sensor, an industrial camera, an infrared sensor, a moving device and a laser sensor, the fixing seat comprises a base, a placing table and a supporting stand column; the weight sensor is arranged on the placing table; the two industrial cameras are arranged on the supporting stand column and are sequentially arranged in the first direction of the horizontal plane. The two infrared sensors are arranged on the base through the moving device and are sequentially arranged in the second direction of the horizontal plane, the first direction is perpendicular to the second direction, and the moving device is used for enabling the two infrared sensors to move in the first direction, the second direction and the vertical plane direction of the horizontal plane; the two laser sensors are arranged on the base through the moving device and are sequentially arranged in the second direction of the horizontal plane. The measurement process is simple in operation, convenient and fast, fixed-point and fixed-position non-contact high-precision measurement in the artificial board water absorption thickness swelling rate measurement process is achieved, and the precision and accuracy of a measurement result are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring the water absorption thickness swelling rate of wood-based panels, in particular to a high-precision measuring tooling. Background Technique

[0002] In recent years, as the requirements of industry laboratories for the reliability of test or calibration results have become higher and higher, in most cases, in addition to obtaining the test or calibration results, it is also required to know the measurement uncertainty of the test or calibration results. In this regard, the standard ISO / IEC 17025:2017 "General Requirements for the Competence of Testing and Calibration Laboratories" also puts forward higher requirements for the evaluation and application of the measurement uncertainty of test results.

[0003] 1. As one of the important physical performance indicators for evaluating the waterproof and moisture-proof properties of wood-based panels, the water absorption thickness swelling rate is determined by the ratio of the increase in the thickness of the wood-based panel specimen after water absorption to the thickness before water absorption. The test method is carried out according to the provisions of Method 1 for Measuring the Water Absorption Thickness Swelling Rate in GB / T 17657-2022 "Test Methods for Physical and Chemical Properties of Wood-based Panels and Decorated Wood-based Panels"; density and density deviation, as physical indicators for evaluating the hot pressing uniformity of the board, are determined by the ratio of the mass of the specimen to the volume, and the test method is carried out according to the provisions of Density Measurement in GB / T 17657-2022 "Test Methods for Physical and Chemical Properties of Wood-based Panels and Decorated Wood-based Panels".

[0004] 2. In the test method, it is required to select a micrometer with a graduation value of 0.01 mm as the thickness measurement tool according to the thickness of the specimen, use the intersection point of the diagonal of the specimen as the thickness measurement point, slowly clamp the measurement surface of the micrometer on the specimen, and apply a pressure of 0.02 MPa to 0.05 MPa to make the specimen in close contact with the measurement surface for measuring the thickness of the specimen.

[0005] 3. At present, the determination of the water absorption thickness swelling rate and density of wood-based panels in the industry's testing institutions still uses traditional mechanical operations for measurement. Due to the differences in test operations among testers, which are related to factors such as their testing experience, usage habits of measuring tools, basic technical knowledge, and skills training, combined with the uncertainty of the measuring instrument itself and the uncertainty superposition introduced by the measurement principle error, multiple repeated measurement processes, and data correction processing in the measurement method, the measured observed values will also change. In terms of the evaluation and application of measurement uncertainty, this measurement method increases the range of uncertainty and the deviation between the test result and the true value for wood-based panels with extremely small water absorption thickness swelling changes, with extremely low accuracy and is prone to misjudgment of the results. There is an urgent need to develop and manufacture higher-precision measurement auxiliary equipment.

[0006] 4. Although the positions of the thickness measurement points and the range of the applied measurement pressure intensity are specified in the standard test methods, due to the anisotropy of the wood unit materials themselves, the water absorption and swelling changes of the wood units after soaking in water cause displacement deviations in the positions of the front and rear measurement points during actual measurement, resulting in inaccurate measurement point positions. Second, because the wood units are softened after water absorption and swelling, there is an interaction between elasticity and plasticity. The pressures applied during the two measurements before and after soaking are at the critical values within the required range of the measuring instrument. After swelling, the measurement and detection personnel need to apply a greater pressure to feel the close contact of the measurement surface, but in fact, the contact surface of the test piece has been compressed and deformed, resulting in a large deviation between the result and the true value.

[0007] In summary, the existing technical methods mainly have the following deficiencies:

[0008] 1. The sample preparation process before testing is cumbersome. It is necessary to draw diagonal lines on each sample block to find the approximate positions of the thickness measurement points, and there are large displacement deviations, and the positions are inaccurate.

[0009] 2. The superposition of the uncertainty of the measuring instrument itself and the uncertainty introduced by multiple measurements of a single sample block results in large errors and low accuracy of the detection results.

[0010] 3. The measurement operation process is a contact measurement. The pressure and touch feeling applied for "tight contact between the test piece and the measurement surface" vary from person to person. If the pressure is too large, the contact surface will be compressed relative to the actual expansion. If the pressure is too small, the contact is not sufficient, and it is easy for the measurement and detection personnel to have measurement fatigue due to single and repeated measurements. Utility Model Content

[0011] Therefore, it is necessary to provide a high-precision measurement tooling to solve the problems that when measuring the water absorption thickness swelling rate of wood-based panels, it is necessary to draw diagonal lines on each sample block to find the approximate positions of the thickness measurement points, and there are large displacement deviations, the positions are inaccurate, the detection results have large errors, and the accuracy is low.

[0012] To achieve the above object, the present utility model provides a high-precision measurement tooling, including a fixed seat, a weight sensor, an industrial camera, an infrared sensor, a moving device, and a laser sensor;

[0013] The fixed seat includes a base, a placement table, and a support column. The placement table and the support column are provided on the base;

[0014] The weight sensor is provided on the placement table;

[0015] Two industrial cameras are provided on the support column and arranged in sequence along the first direction of the horizontal plane;

[0016] The two infrared sensors are arranged on the base through the mobile device and are arranged in sequence along the second direction of the horizontal plane. The first direction is perpendicular to the second direction. The mobile device is used to move the two infrared sensors along the first direction, the second direction of the horizontal plane, and the vertical plane direction;

[0017] The two laser sensors are arranged on the base through the mobile device and are arranged in sequence along the second direction of the horizontal plane.

[0018] Furthermore, the mobile device includes a first linear movement mechanism, two second linear movement mechanisms, and two third linear movement mechanisms;

[0019] The first linear movement mechanism is arranged on the base and extends along the second direction, and is used to move the third linear movement mechanism and the second linear movement mechanism along the second direction of the horizontal plane. The support column straddles above the first linear movement mechanism;

[0020] The two third linear movement mechanisms are arranged on the first linear movement mechanism. The third linear movement mechanism extends along the vertical plane and is used to move the second linear movement mechanism along the vertical plane;

[0021] Each of the third linear movement mechanisms is provided with a second linear movement mechanism and a laser sensor. The second linear movement mechanism extends along the first direction and is used to move the infrared sensor and the laser sensor along the first direction of the horizontal plane.

[0022] Furthermore, the first linear movement mechanism, the second linear movement mechanism, and the third linear movement mechanism are all screw-nut mechanisms.

[0023] Furthermore, the screw-nut mechanism has a screw rod, and a knob is arranged on the screw rod to adjust the rotation of the screw rod through the knob.

[0024] Furthermore, it further includes four feet. The base is rectangular, and the four feet are arranged on the bottom surface of the base and are located at the four corners of the base.

[0025] Furthermore, it further includes a controller and a display. The weight sensor, the industrial camera, the infrared sensor, the laser sensor, and the display are respectively connected to the controller. The controller displays the information detected by the weight sensor, the industrial camera, the infrared sensor, and the laser sensor through the display.

[0026] Furthermore, the controller is connected to an operation panel, and the operation panel is arranged on the support column.

[0027] The above technical solution has the following beneficial effects:

[0028] 1. The measurement process is simple, convenient, fast, and can solve the non-contact high-precision measurement of fixed-point positioning during the determination of the water absorption thickness swelling rate of wood-based panels. It can more directly measure and calculate index parameters such as the basic size, water absorption thickness swelling rate, density, and density deviation of samples, and at the same time improve the accuracy and precision of the measurement results.

[0029] 2. It can not only optimize the test method, optimize the cumbersome sample processing steps such as scribing and fixed-point marking before soaking, reduce the measurement differences before and after, or errors introduced by factors such as multiple repeated measurements and fatigue operations, improve the accuracy of the detection results, but also save the time, financial resources, and material resources required for personnel skills training.

[0030] 3. Eliminate the test fatigue of the inspectors and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a perspective view of the measuring tooling in this embodiment;

[0032] Figure 2 It is a schematic structural diagram of the laser sensor in this embodiment;

[0033] Figure 3 It is a schematic structural diagram of the operation panel in this embodiment;

[0034] Figure 4 It is a top view of the measuring tooling in this embodiment;

[0035] Figure 5 It is a side view of the measuring tooling in this embodiment;

[0036] Figure 6 It is a perspective view of the moving device in this embodiment;

[0037] Figure 7 It is a schematic diagram of the laser cross spot in this embodiment;

[0038] Figure 8 It is a schematic diagram of the center coordinates of the four quadrants of the measurement position in this embodiment;

[0039] Figure 9 It is a schematic diagram of the relative position between the center of the four quadrants and the centroid of the spot in this embodiment;

[0040] Figure 10 It is a schematic diagram of the spot coincidence correction in this embodiment;

[0041] Figure 11 It is that in this embodiment, the industrial camera collects images of the sample from different angles.

[0042] Description of the reference numerals in the drawings:

[0043] 1. Fixed base;

[0044] 11. Base; 12. Placing table; 13. Support column; 14. Foot pad;

[0045] 2. Weight sensor;

[0046] 3. Industrial camera;

[0047] 4. Infrared sensor;

[0048] 5. Moving device;

[0049] 51. First linear moving mechanism;

[0050] 52. Second linear moving mechanism; 521. Second support plate;

[0051] 53. Third linear moving mechanism; 531. Third support plate;

[0052] 54. Lead screw;

[0053] 55. Slide table;

[0054] 56. Linear slide rail;

[0055] 57. Knob;

[0056] 6. Laser sensor;

[0057] 7. Sample;

[0058] 8. Operation panel. Detailed implementation manners

[0059] To describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following is a detailed description in combination with specific embodiments and with reference to the accompanying drawings.

[0060] Please refer to Figures 1 to 6 , Figure 8 , in this embodiment, a high-precision measurement tooling includes a fixed base 1, a weight sensor 2, an industrial camera 3, an infrared sensor 4, a moving device 5 and a laser sensor 6;

[0061] The fixed base 1 includes a base 11, a placing table 12 and a support column 13, and the placing table 12 and the support column 13 are provided on the base 11;

[0062] The weight sensor 2 is arranged on the placing table 12 and is used to detect the weight of the sample;

[0063] Two industrial cameras 3 are arranged on the support column 13 and are arranged in sequence along the first direction (such as Figure 4 the arrow X shown in

[0064] Two infrared sensors 4 are arranged on the base 11 through a moving device 5 and are arranged in sequence along the second direction of the horizontal plane (as indicated by the arrow Y in Figure 4 ), the first direction is perpendicular to the second direction, and the moving device 5 is used to move the two infrared sensors 4 in the first direction, the second direction of the horizontal plane, and the vertical plane direction;

[0065] Two laser sensors 6 are arranged on the base 11 through a moving device 5 and are arranged in sequence along the second direction of the horizontal plane. The two laser sensors 6 are used to detect the length of the sample 7 in the second direction ( Figures 1 to 5 the length shown is the thickness of the sample 7), and the structure is as Figure 8 shown.

[0066] The above technical solution has the following beneficial effects:

[0067] 1. The measurement process is simple, convenient, and fast. It solves the non-contact high-precision measurement of fixed-point positioning in the determination of the water absorption thickness swelling rate of wood-based panels, and more directly measures and calculates index parameters such as the basic size, water absorption thickness swelling rate, density, and density deviation of the sample, while improving the accuracy and precision of the measurement results.

[0068] 2. It can not only optimize the test method, optimize the cumbersome sample processing steps such as scribing and fixing points before soaking and impregnation, reduce the measurement differences before and after, or the errors introduced by factors such as multiple repeated measurements and fatigue operations, improve the accuracy of the detection results, but also save the time, financial resources, and material resources required for personnel skill training.

[0069] 3. Eliminate the test fatigue of the testers and improve work efficiency.

[0070] Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 . In this embodiment, the moving device 5 includes a first linear moving mechanism 51, two second linear moving mechanisms 52, and two third linear moving mechanisms 53; the first linear moving mechanism 51 is arranged on the base 11 and extends along the second direction, and is used to move the third linear moving mechanism and the second linear moving mechanism along the second direction of the horizontal plane. The support column 13 spans above the first linear moving mechanism 51; two third linear moving mechanisms 53 are arranged on the first linear moving mechanism, and the third linear moving mechanism 53 extends along the vertical plane and is used to move the second linear moving mechanism along the vertical plane; each third linear moving mechanism 53 is provided with a second linear moving mechanism 52, and the second linear moving mechanism 52 extends along the first direction and is used to move the infrared sensor 4 and the laser sensor 6 along the first direction of the horizontal plane.

[0071] In some embodiments, the moving device 5 may be a plurality of mechanical arms, and the infrared sensor 4 is driven to move by the plurality of mechanical arms.

[0072] Please refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , in this embodiment, the first linear motion mechanism 51, the second linear motion mechanism 52, and the third linear motion mechanism 53 are all screw-nut mechanisms. The screw-nut mechanism can convert rotational motion into linear motion with high transmission accuracy.

[0073] Please refer to Figure 1 、 Figures 4 to 6 , specifically, the screw nut mechanism includes a screw 54, a stopper, a nut, a slide 55 and a linear slide 56. The screw is arranged on the stopper, and the screw 54 can rotate on the stopper through a bearing. The screw 54 is threadedly connected to the nut, and the nut is arranged on the slide 55. The slide 55 is slidably connected to the linear slide 56. The screw 54 can be driven to rotate by electric or manual means. The electric means is to connect the screw 54 to a motor transmission and drive the screw 54 to rotate by the motor. The manual means is to provide a knob 57 on the screw 54 and adjust the rotation of the screw 54 by the knob 57. Preferably, the screws 54 of the first linear motion mechanism 51, the second linear motion mechanism 52 and the third linear motion mechanism 53 are all provided with knobs 57, so that the position of the infrared sensor 4 can be manually and accurately adjusted.

[0074] Still Read Figure 1 、 Figures 4 to 6 , specifically, when the first linear motion mechanism 51, the second linear motion mechanism 52, and the third linear motion mechanism 53 are all screw-nut mechanisms, the stopper and the linear slide rail 56 of the first linear motion mechanism 51 can be arranged on the base 11 through the first support plate, the stopper and the linear slide rail 56 of the third linear motion mechanism 53 can be arranged on the slide 55 of the first linear motion mechanism 51 through the third support plate 531, the stopper and the linear slide rail 56 of the second linear motion mechanism 52 can be arranged on the slide 55 of the third linear motion mechanism 53 through the second support plate 521, and the infrared sensor 4 is arranged on the slide 55 of the second linear motion mechanism.

[0075] Please refer to Figure 1 , in this embodiment, the high-precision measuring tool also includes four feet 14, the base 11 is rectangular, and the four feet 14 are arranged on the bottom surface of the base 11 and at the four corners of the base 11. The feet 14 can buffer the force when the parts move, so that the base 11 is better leveled and the measurement results are not greatly affected.

[0076] In this embodiment, the high-precision measurement tooling further includes a controller and a display. The weight sensor 2, industrial camera 3, infrared sensor 4, laser sensor 6, and display are respectively connected to the controller, and the controller displays the information detected by the weight sensor 2, industrial camera 3, infrared sensor 4, and laser sensor 6 through the display.

[0077] Please refer to Figure 3 , in this embodiment, an operation panel 8 is provided on the support column 13. The operation panel 8 is connected to the controller, and instructions for the operation of the measurement tooling can be input through the operation panel to perform the measurement work.

[0078] In this embodiment, the function of the infrared sensor 4 is to perform coincidence correction on the spot at the measurement point position. The infrared sensor 4, laser sensor 6, laser positioning indicator, and the corresponding processor can be integrated in a laser thickness gauge.

[0079] Please refer to Figure 1 , in this embodiment, the measurement tooling is cast from a metal material. The base 11 and the support column 13 are both designed integrally with high-precision cast iron to ensure the stability of the tooling equipment and system.

[0080] The working principle of this application is as follows:

[0081] 1. The measurement tooling uses the industrial camera to simulate the human eyes to collect images of the sample from different angles through the optical imaging principle. The structure is as Figure 11 shown. The collected image signal is sent to the controller, and the controller transmits the information signal of the thickness measurement point of the sample to the laser sensor. After receiving the measurement point signal, the laser sensor immediately measures the thickness of the point and sends it to the controller in the form of a digital signal. The controller directly displays and calculates the relevant test values through the display.

[0082] 2. The weight sensor is fixed on the placement table to measure the weight of the measured sample.

[0083] 3. By using the first linear moving mechanism, the second linear moving mechanism, the third linear moving mechanism, and the laser positioning indicator, the measurement position required for the measured sample can be quickly located. The first linear moving mechanism can adjust the distance between the infrared sensor and the reference surface of the sample; the positioning and measurement accuracy are high, the measurement data can be analyzed and processed by the SPC system of the processor, the operation is convenient, which can improve the work efficiency, save floor space, and can be directly used for the measurement of the basic dimensions and weight of the board, and supplemented by the determination of items such as density, density deviation, and water absorption thickness swelling rate.

[0084] 4. Before measurement, place the sample vertically and correctly at the center of the placement table. After setting and selecting according to the required measurement items, the industrial camera can perform image scanning and collection. After being processed by the controller into relevant coordinate data information, the two-dimensional coordinate position of the thickness measurement point is confirmed, and then this position information is transmitted to the laser positioning indicator. After receiving the site information instruction, the laser positioning indicator automatically measures and focuses the cursor for position correction of the thickness point, so that the cross cursor at the center of the laser emission coincides with the center of the specimen thickness measurement point. The structure is as shown in Figure 7 , Figure 8 , Figure 9 and Figure 10 . During operation, the first laser sensor emits a beam of laser to irradiate the surface of the sample. The diffuse reflection light of the surface light spot returns to the CCD chip inside the first laser sensor. By analyzing and calculating the position of the light spot on the CCD chip by the controller, the actual distance A from the first laser sensor to the sample surface can be obtained; similarly, the actual distance B from the second laser sensor to the other surface of the sample can be obtained. Subtracting the distances from the two laser sensors to the two side surfaces of the sample from the distance T between the two laser sensors can obtain the thickness t of the sample. The thickness t of the sample = T - A - B, as shown in Figure 2 . After that, it can be displayed, read out, stored, or printed in digital form.

[0085] 5. When used to assist in measuring the water absorption thickness swelling rate of the board, this measurement tooling can omit the processing step of scribing the diagonal of the sample to find the thickness measurement point; similarly, when measuring density, the sample size measurement, weight measurement, and other sample processing processes are also omitted, greatly shortening the time for pre-sample processing. Secondly, the optical sensing technology measurement can reach micron-level accuracy, far higher than the accuracy requirements of existing methods, and the test results are more accurate and conform to the actual swelling change situation.

[0086] 6. This measurement tooling can achieve project testing in the "one-to-many" mode, that is, in addition to being used to assist in measuring density and water absorption swelling rate, it can also be used for other projects related to size and weight, improving the utilization of resource allocation, saving the occupied space for placing measurement instruments, and reducing the outsourcing calibration costs of multiple measurement instruments.

[0087] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, elements defined by the statement "comprising..." or "including..." do not preclude the existence of additional elements in the process, method, article or terminal device comprising the said elements. In addition, in this text, "greater than", "less than", "exceeding", etc. are understood not to include the present number; "above", "below", "within", etc. are understood to include the present number.

[0088] Although the above-described embodiments have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the above are only the embodiments of the present utility model, and do not limit the patent protection scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A high-precision measuring tool, characterized in that: Including fixed base, weight sensor, industrial camera, infrared sensor, mobile device, laser sensor; The fixing seat comprises a base, a placing platform and a supporting column, and the placing platform and the supporting column are arranged on the base; The weight sensor is arranged on the placement table; The two industrial cameras are arranged on the supporting column and are arranged in sequence along a first direction of a horizontal plane; The two infrared sensors are arranged on the base through the moving device and are arranged in sequence along the second direction of the horizontal plane, the first direction is perpendicular to the second direction, and the moving device is used to move the two infrared sensors along the first direction and the second direction of the horizontal plane and the vertical direction; The two laser sensors are arranged on the base through the moving device and are arranged in sequence along the second direction of the horizontal plane.

2. The high-precision measuring tool according to claim 1, characterized in that: The moving device includes a first linear moving mechanism, two second linear moving mechanisms and two third linear moving mechanisms; The first linear motion mechanism is arranged on the base and extends along the second direction, and is used to make the third linear motion mechanism and the second linear motion mechanism move along the second direction of the horizontal plane, and the support column spans above the first linear motion mechanism; The two third linear motion mechanisms are arranged on the first linear motion mechanism, and the third linear motion mechanisms extend along the vertical plane, and are used to make the second linear motion mechanism move along the vertical plane; Each of the third linear motion mechanisms is provided with a second linear motion mechanism and a laser sensor. The second linear motion mechanism extends along the first direction and is used to move the infrared sensor and the laser sensor along the first direction of the horizontal plane.

3. The high-precision measuring tool according to claim 2, characterized in that: The first linear motion mechanism, the second linear motion mechanism, and the third linear motion mechanism are all screw-nut mechanisms.

4. The high-precision measuring tool according to claim 3 is characterized in that: The screw-nut mechanism comprises a screw rod, and a knob is arranged on the screw rod, and the rotation of the screw rod is adjusted by the knob.

5. The high-precision measuring tool according to claim 1, characterized in that: It also includes four pads. The base is rectangular. The four pads are arranged on the bottom surface of the base and are located at the four corners of the base.

6. The high-precision measuring tool according to claim 1, characterized in that: It also includes a controller and a display. The weight sensor, the industrial camera, the infrared sensor, the laser sensor, and the display are respectively connected to the controller. The controller displays the information detected by the weight sensor, the industrial camera, the infrared sensor, and the laser sensor through the display.

7. The high-precision measuring tool according to claim 6, characterized in that: The controller is connected to an operation panel, and the support column is provided with the operation panel.

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