A screen center of gravity detection device and detection method thereof

Abstract

The screen center of gravity detection device of the present invention mainly includes a detection box, a calibration plate and a detection frame, and its detection method is to first place a weight on a plurality of calibration positioning points of the calibration plate in sequence to perform a first calibration of the device accuracy, then remove the calibration plate and replace it with a positioning plate of the detection frame, and at the same time display a bracket mode on the display to perform a second calibration of the device accuracy; after the second calibration is completed, remove a calibration screen and horizontally set a screen to be tested, click a horizontal measurement key to display and record the value of a first center of gravity point of the screen to be tested; then rotate the screen to be tested

Description

[Technical Field]

[0001] This invention relates to a screen center of gravity detection device and method, particularly to a device that can simply, quickly and accurately detect the center of gravity position of the screen. [Previous Technology]

[0002] The center of gravity is the center of gravity of an object. In aerospace, electronics, machinery, vehicles and other fields, the position of the center of gravity is often a parameter that needs to be accurately located, especially when there is a need for support. Accurately obtaining the position of the center of gravity can not only provide good support and stability, but also prevent the generation of rotational torque due to misalignment of the center of gravity, which can lead to tilting or damage to the machine parts.

[0003] The suspension line method is a traditional method for detecting the center of gravity. For planar objects, it mainly involves suspending the object from different positions using suspension lines, and obtaining the center of gravity of the object through the intersection of two suspension lines. For three-dimensional objects, the intersection of three suspension lines is the center of gravity of the object. However, when applying the suspension line method to detect the center of gravity of three-dimensional objects, especially geometrically irregular objects, the operation process is cumbersome and the accuracy is low. Therefore, it is not suitable for measuring the center of gravity of objects of all shapes and sizes.

[0004] Patent documents such as CN111999776B "A Center of Gravity Detection Device" and CN214096484U "A Helmet Center of Gravity and Moment of Inertia Testing Device" provide different detection methods for missile heads and helmets of different shapes to detect the center of gravity separately. However, for screens commonly used in electronic devices, the detection of their center of gravity is an important factor affecting the screen's support and stability, but it has not received due attention for a long time, especially due to the lack of objective and effective testing and research methods, which is an urgent problem to be solved. [Summary of the Invention]

[0005] In view of this, in order to provide a structure that is different from conventional technology and to improve the above-mentioned shortcomings, the inventors have accumulated many years of experience and continuous research and development, resulting in this invention.

[0006] One objective of this invention is to provide a screen center of gravity detection device and method, which can solve the problems of existing electronic screens lacking an effective center of gravity detection method and the cumbersome operation and low accuracy of using the traditional suspension method to measure the center of gravity position. By providing a positioning groove on the top surface of a detection box and distributing a plurality of pressure sensors to accommodate and position a calibration plate or a positioning plate of a detection frame, after the first and second calibrations to confirm the accuracy of the device, the center of gravity of the screen under test is calculated by detecting the center of gravity value of the screen under test horizontally and after rotating the screen under test by 90 degrees, and the result is displayed on the display. This allows for simple, fast and accurate detection of the screen's center of gravity position, thereby providing a reference for screen design and manufacturing, achieving effective support and stability, and extending the service life of the components.

[0007] To achieve the above-mentioned objective, the screen center of gravity detection device of the present invention includes a detection box, a calibration plate, and a detection frame. The detection box has a top surface with a positioning groove. A plurality of pressure sensors are distributed on the bottom surface of the positioning groove. The plurality of pressure sensors are connected to a display for transmitting and displaying at least one detection value. The calibration plate is accommodated and positioned in the positioning groove. The calibration plate has a central positioning point on its surface. A plurality of calibration positioning points are distributed around the central positioning point for placing a weight. The detection frame has a positioning plate for replacing the calibration plate to accommodate and position in the positioning groove. The top surface of the positioning plate has an upright member. The top of the upright member has a connector for connecting and replacing a calibration screen and a screen to be tested.

[0008] In implementation, the top surface is square, and the periphery of the top surface has four side plates and four first corners. The four side plates surround to form a positioning groove. The correction plate and the positioning plate have the same shape as the positioning groove, and are respectively accommodated and positioned in the positioning groove.

[0009] During implementation, four pressure sensors are distributed on the bottom surface of the positioning groove, and the four pressure sensors are located inside the four first corners respectively.

[0010] During implementation, four correction positioning points are distributed around the center positioning point of the correction plate. The four correction positioning points are located on the four second corners of a virtual quadrilateral, and the four correction positioning points are equidistant from the center positioning point.

[0011] In implementation, the central positioning point and any one of the four correction positioning points are circular in shape.

[0012] In practice, the front end of the calibration screen has a flat portion, and the midpoint of the flat portion is located directly above the center of the center positioning point.

[0013] The detection method of the screen center of gravity detection device of the present invention includes the following steps: A. Placing weights sequentially on a plurality of calibration positioning points of the calibration plate to perform the first calibration of the device accuracy; B. After the first calibration is completed, removing the calibration plate and replacing it with a positioning plate, connecting the calibration screen with a connector, and displaying a support mode on the display to perform the second calibration of the device accuracy; C. After the second calibration is completed, removing the calibration screen and connecting it to the screen under test, setting the screen under test horizontally, and then clicking a horizontal measurement button on the display to display and record the value of a first center of gravity point of the screen under test; and D. After rotating the screen under test by 90 degrees, clicking a vertical measurement button on the display to display and record the value of a second center of gravity point of the screen under test, and calculating the center of gravity of the screen under test based on the values ​​of the first and second center of gravity points, and displaying it on the display.

[0014] During implementation, the weight is cylindrical and the center positioning point of the calibration plate is circular. Before step A, a load cell detection step is included, which involves selecting a calibration mode on the display, clicking the zeroing button, and then placing the weight inside the circle of the center positioning point to display the weight error value of the weight, thereby determining whether the multiple pressure sensors are normal.

[0015] During implementation, the weight is cylindrical, and the center positioning point of the calibration plate and any one of the four calibration positioning points are circular. Step A includes a center origin detection step, which involves selecting a calibration mode on the display, clicking the zeroing button, and then placing the weight inside the circle of the center positioning point for detection. Afterward, the instantaneous value displayed on the display is entered into a center offset value field to offset the instantaneous value. After the instantaneous value of the center point of the weight is re-displayed, it is determined whether the detection box is normal.

[0016] In practice, step A further includes a four-quadrant detection step, which is after the center origin detection step. The weights are placed in the circles of the four calibration positioning points of the calibration plate in sequence. The real-time values ​​are displayed by floating to determine whether there is an abnormality. When an abnormal value is found, the system returns to the center origin detection step to reset the offset value of the center point of the weights.

[0017] During implementation, after the calibration plate, upright component, connector and calibration screen display one of the real-time values ​​on the display, if an abnormal value occurs, return to the center origin detection step and the four quadrant detection step for recalibration.

[0018] During implementation, the weight is cylindrical, the center positioning point of the calibration plate is circular, and the front end of the calibration screen has a flat part, the middle point of the flat part is located directly above the center of the center positioning point; in step B, the calibration plate, the upright part and the connecting part are positioned first, and after clicking the zeroing button, the calibration screen is installed to perform a second calibration of the device accuracy.

[0019] To further understand the present invention, preferred embodiments are described below in conjunction with drawings and reference numerals to illustrate the specific composition and effects of the present invention in detail:

Implementation Method

[0020] The screen center of gravity detection device of the present invention mainly includes a detection box, a calibration plate, and a detection frame. The detection box has a top surface with a positioning groove. A plurality of pressure sensors are distributed on the bottom surface of the positioning groove. The plurality of pressure sensors are connected to a display to transmit and display at least one detection value. The calibration plate is first accommodated and positioned in the positioning groove. The calibration plate has a central positioning point on its surface. A plurality of calibration positioning points are distributed around the central positioning point for placing a weight to calibrate the accuracy of the device. The detection frame has a positioning plate for replacing the calibration plate and accommodating and positioning it in the positioning groove. The top surface of the positioning plate has an upright member. The top of the upright member has a connector. The connector is first connected to a calibration screen for calibration, and then a screen to be tested is replaced to detect the center of gravity.

[0021] Please refer to Figures 1 to 7, which are preferred embodiments of the screen center of gravity detection device 1 of the present invention, mainly including a detection box 2, a calibration plate 3, and a detection frame 4. The detection box 2 is a cuboid, which is placed flat on a rigid table. In practice, the detection box 2 has a level inside, so that the angle at which the detection box 2 is placed flat can be between 0 degrees and 0.2 degrees to ensure accurate positioning. The upper part of the detection box 2 has a square top surface 21. The periphery of the top surface 21 is surrounded by four side plates 211. The four side plates 211 together form a positioning groove 212. The four corners of the four side plates 211 respectively form four first corners 213. Four pressure sensors 214 are distributed on the bottom surface of the positioning groove 212. The four pressure sensors 214 are located inside the four first corners 213 respectively. The four pressure sensors 214 are connected to a display 22 so that after each pressure sensor 214 performs detection, the detection value or the value calculated by a processor is transmitted and displayed on the display 22.

[0022] The calibration plate 3 is a square plate. The calibration plate 3 and the positioning groove 212 have the same shape, so as to accommodate and position the calibration plate 3 in the positioning groove 212. The calibration plate 3 has a circular central positioning point 31 on its surface. Four calibration positioning points 32 are distributed around the central positioning point 31. The four calibration positioning points 32 are circular in shape, and the size of the circular shape of each calibration positioning point 32 is the same as that of the central positioning point 31, for placing a weight 9. In addition, the center of the four calibration positioning points 32 is located on the four second corners 34 of a virtual quadrilateral 33, and the center of each calibration positioning point 32 is equidistant from the center of the central positioning point 31.

[0023] The testing frame 4 includes a positioning plate 41, an upright member 42, and a connecting member 43. The positioning plate 41 is a square flat plate with the same shape as the calibration plate 3, so as to replace the calibration plate 3 and be accommodated and positioned in the positioning groove 212 of the testing box 2. The upright member 42 is a rod-shaped column. The bottom end of the upright member 42 is connected to the center of the top surface of the positioning plate 41, and the top end of the upright member 42 is connected to an upright plate. The upright plate serves as the connecting member 43. The plate surface of the connecting member 43 has four locking members 431 with square corners, so that after locking a calibration screen 91 or a screen to be tested 92, the calibration screen 91 or the screen to be tested 92 can be set in a horizontal direction, or the screen to be tested 92 can be set in an upright direction after being rotated 90 degrees. Additionally, the front end of the calibration screen 91 has a flat portion 911. After the connector 43 locks the calibration screen 91, the midpoint M of the flat portion 911 corresponds to the center position of the center positioning point 31 of the calibration plate 3 and is located directly above the center positioning point 31.

[0024] Based on the structure of the screen center of gravity detection device 1 described above, as shown in Figures 2, 4, 6, 7 and 8, the method of using the screen center of gravity detection device 1 of the present invention mainly includes the following steps: A. Place the weights 9 sequentially on a plurality of calibration positioning points 32 of the calibration plate 3 to perform the first calibration of the device accuracy; B. After the first calibration is completed, remove the calibration plate 3 and replace it with the positioning plate 41, connect the calibration screen 91 with the connector 43, and display a bracket mode on the display 22 to perform the second calibration of the device accuracy; C. After the second calibration is completed, remove the calibration screen 91 and connect the screen under test 92. Set the screen under test 92 in a horizontal orientation, and then click one of the horizontal measurement buttons on the monitor 22 to display and record the value of the first center of gravity (X, Z1) of the screen under test 92; and D. After rotating the screen under test 92 by 90 degrees, click one of the vertical measurement buttons on the monitor 22 to display and record the value of the second center of gravity (Y, Z2) of the screen under test 92. At the same time, calculate the center of gravity of the screen under test based on the values ​​of the first and second center of gravity and display it on the monitor.

[0025] In step A, the weight 9 is cylindrical, and its outer diameter is the same as the circle shape and size of the center positioning point 31 and each calibration positioning point 32; the weight of the weight 9 is 0.5 kg. Before step A, there is a load cell detection step, which involves selecting a calibration mode on the screen 92 to be tested, clicking the zeroing button, and then placing the weight 9 inside the circle of the center positioning point 31 to display the weight error value of the weight 9, thereby determining whether the plurality of pressure sensors 214 are normal. If the weight error value exceeds 0.02 kg, the pressure sensor 214 is suspected of being damaged and needs to be returned to the factory for repair.

[0026] In step A, the first calibration of the device accuracy mainly includes a center origin detection step and a four-quadrant detection step. The center origin detection step is operated in calibration mode. After clicking the zeroing button, the weight 9 is placed inside the circle of the center positioning point 31 for detection. At this time, an instantaneous value (Bx, Bz) will be displayed on the screen 92 under test. Then, the data of the instantaneous value (Bx, Bz) is filled into the center offset value field to offset the instantaneous value (Bx, Bz) so that the display of the instantaneous value (Bx, Bz) is close to 0. For example, assuming the initial instantaneous value is (-3.95mm, -0.2mm), then (+3.95mm, +0.2mm) is entered in the center offset value field. After the instantaneous values ​​(Bx, Bz) of the center point of the re-floating display weight 9 are displayed, it can be determined whether the detection box 2 is normal. For example, if the value of the center point exceeds the range of ±0.2mm, it is an abnormal state.

[0027] After the center origin detection is correct, the four-quadrant detection step is then performed. This involves placing the weights 9 sequentially within the circles of the four calibration positioning points 32 on the calibration plate 3, and displaying their instantaneous values ​​(Bx, Bz) by floating. The values ​​displayed by each instantaneous value (Bx, Bz) are then used to determine if there is any abnormality in the detection box 2. For example, the coordinate positions of the four calibration positioning points 32 in the four quadrants are (±120mm, ±70mm). If any coordinate shows an abnormal value, such as an error value not within ±1.5mm, it is determined to be an abnormal state, and it is necessary to return to the center origin detection step, reset the center point offset value, and then repeat the four-quadrant detection step.

[0028] In step B, the material of the calibration screen 91 is transparent acrylic and the material is uniform. After the calibration plate 3 is removed and replaced with the positioning plate 41 of the test frame 4, a support mode is displayed on the display 22. After clicking the zeroing button, the calibration screen 91 is locked in place by the connector 43, so that the calibration screen 91 is set in a horizontal direction. At the same time, the support mode offset value (Px, Pz) is set so that Px < ±0.5mm and Pz = 8.5mm ± 0.5mm, so as to perform a second calibration of the device accuracy. If the measurement error exceeds ±0.5mm, the center point offset value of the weight 9 needs to be reset again. In addition, during the test, the display 22 will display an instantaneous value (Px, Pz). If an abnormal value appears, for example, the measurement value exceeds the range of ±2mm, it is determined to be an abnormal state, and it is necessary to return to the center origin test step and the four quadrant test step for recalibration.

[0029] In step D, after the detection box 2 obtains and records the values ​​of the first horizontal center of gravity and the second vertical center of gravity of the screen under test 92, the processor will calculate the center of gravity of the screen under test 92 based on the two data and the torque balance principle, and output the result on the display 22, as shown in Figure 8.

[0030] In summary, according to the above-disclosed content, the calibration plate of the present invention is positioned in the positioning groove of the testing box. A weight is then placed on one of the central positioning points and four calibration positioning points of the calibration plate to perform the first accuracy calibration of the testing box. By replacing the testing frame and positioning its positioning plate in the positioning groove of the testing box, and simultaneously connecting the calibration screen, the second accuracy calibration of the device can be performed. After confirming that the testing box is functioning normally, the values ​​of the first horizontal center of gravity and the second vertical center of gravity of the screen under test are obtained and recorded. Then, the processor performs calculations to determine the center of gravity of the screen under test, which is then displayed on the monitor. Its operation is simple, and it can accurately detect the center of gravity position of the screen. This not only provides a reference for screen design and manufacturing to achieve effective support and stability, extend the service life of components, but also enables rapid quality control inspection to improve efficiency and save labor costs. Therefore, the present invention has significant industrial value, and a patent application is hereby filed in accordance with the law.

[0031] Although the present invention discloses preferred embodiments to achieve the above objectives, it is not intended to limit the structural features of the present invention. Anyone skilled in the art should know that any easily conceivable variations or modifications are possible under the technical spirit of the present invention and are covered by the patent application scope of the present invention. [Simplified Explanation of the Diagram]

[0032] [Figure 1] is an exploded view of the components of the screen center of gravity detection device of the present invention when the calibration plate is separated from the detection box. [Figure 2] is a three-dimensional view of the screen center of gravity detection device of the present invention mounted on the detection box. [Figure 3] is an exploded view of the components of the screen center of gravity detection device of the present invention when the detection frame is separated from the detection box. [Figure 4] is a three-dimensional view of the screen center of gravity detection device of the present invention mounted on the detection box. [Figure 5] is a top view of the screen center of gravity detection device of the present invention mounted on the detection box. [Figure 6] is a schematic diagram of the usage state when the screen under test is horizontally set for measurement. [Figure 7] is a schematic diagram of the usage state when the screen under test is vertically set for measurement. [Figure 8] is a data graph output by the screen under test after center of gravity measurement.

Claims

1. A screen center of gravity detection device, comprising: A testing box having a top surface with a positioning groove, the bottom surface of which is provided with a plurality of pressure sensors connected to a display for transmitting and displaying at least one test value; a calibration plate for being accommodated and positioned within the positioning groove, the calibration plate having a central positioning point on its surface and a plurality of calibration positioning points distributed around the central positioning point for placing a weight; and a testing frame having a positioning plate for replacing the calibration plate to be accommodated and positioned within the positioning groove, the top surface of the positioning plate having an upright member, the top of which has a connector for locking and replacing a calibration screen and a screen to be tested.

2. The screen center of gravity detection device as claimed in claim 1, wherein the top surface is square, and the periphery of the top surface has four side plates and four first corners, the four side plates surrounding to form the positioning groove; the correction plate and the positioning plate have the same shape as the positioning groove, and are respectively accommodated and positioned in the positioning groove.

3. The screen center of gravity detection device as claimed in claim 2, wherein four pressure sensors are distributed on the bottom surface of the positioning groove, and the four pressure sensors are respectively located inside the four first corners.

4. The screen center of gravity detection device as claimed in claim 1, wherein four calibration positioning points are distributed around the center positioning point of the calibration plate, the four calibration positioning points are respectively located on the four second corners of a virtual quadrilateral, and the four calibration positioning points are equidistant from the center positioning point.

5. The screen center of gravity detection device as described in claim 4, wherein the center positioning point and any one of the four correction positioning points are circular in shape.

6. The screen center of gravity detection device as claimed in claim 5, wherein the front end of the calibration screen has a flat portion, the midpoint of which is located directly above the center of the center positioning point.

7. A testing method for a screen center of gravity detection device according to any one of claims 1 to 6, comprising the following steps: A. sequentially placing the weight on the plurality of calibration positioning points of the calibration plate to perform a first calibration of the device accuracy; B. after the first calibration is completed, removing the calibration plate and replacing it with the positioning plate, connecting the calibration screen with the connector, and simultaneously displaying a support mode on the display to perform a second calibration of the device accuracy; C. after the second calibration is completed, removing the calibration screen and connecting it to the screen under test, setting the screen under test horizontally, and then clicking a horizontal measurement button on the display to display and record the value of a first center of gravity point of the screen under test; and D. after rotating the screen under test by 90 degrees, clicking a vertical measurement button on the display to display and record the value of a second center of gravity point of the screen under test, and simultaneously calculating the center of gravity of the screen under test based on the values ​​of the first center of gravity point and the second center of gravity point, and displaying it on the display.

8. The detection method of the screen center of gravity detection device as described in claim 7, wherein the weight is cylindrical and the center positioning point of the calibration plate is circular; before step A, a load cell detection step is further included, which involves selecting a calibration mode on the display, clicking the zeroing button, and then placing the weight inside the circle of the center positioning point to display the weight error value of the weight, thereby determining whether the plurality of pressure sensors are normal.

9. The detection method of the screen center of gravity detection device as described in claim 7, wherein the weight is cylindrical, and the center positioning point of the calibration plate and any one of the four calibration positioning points are circular; step A includes a center origin detection step, which involves selecting a calibration mode on the display, clicking the zeroing button, placing the weight inside the circle of the center positioning point for detection, then filling a center offset value field with an instantaneous value displayed on the display to offset the instantaneous value, and after re-displaying another instantaneous value of the center point of the weight, determining whether the detection box is normal.

10. The detection method of the screen center of gravity detection device as described in claim 9, wherein, Step A further includes a four-quadrant detection step, which is to place the weight sequentially within the circles of the four calibration positioning points of the calibration plate after the center origin detection step. The real-time values ​​are displayed by floating to determine whether there is an abnormality. If an abnormal value is found, the system returns to the center origin detection step to reset the offset value of the center point of the weight.

11. The detection method of the screen center of gravity detection device as described in claim 10, wherein after the calibration plate, the upright member, the connector and the calibration screen display an instantaneous value on the display, if an abnormal value occurs, the system returns to the center origin detection step and the four-quadrant detection step for recalibration.

12. The detection method of the screen center of gravity detection device as described in claim 7, wherein the weight is cylindrical, the center positioning point of the calibration plate is circular, the front end of the calibration screen has a flat portion, and the midpoint of the flat portion is located directly above the center of the center positioning point; in step B, the calibration plate, the upright member and the connecting member are first positioned, the zeroing button is clicked, and then the calibration screen is installed to perform a second calibration of the device accuracy.

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