Screen center detection device and detection method thereof

Abstract

The screen gravity center detection device of the present application mainly comprises a detection box, a correction plate and a detection frame, and the detection method is to place a weight on a plurality of correction positioning points of the correction plate in sequence to perform the first correction of the device accuracy, then remove the correction plate and replace it with a positioning plate of the detection frame, and display a support mode on the display to perform the second correction of the device accuracy; after the second correction is completed, a correction screen is removed and a to-be-tested screen is horizontally arranged, a horizontal measurement key is clicked to display and record the value of a first gravity center point of the to-be-tested screen; then the to-be-tested screen is rotated by 90 degrees, a vertical measurement key is clicked to display and record the value of a second gravity center point of the to-be-tested screen, and the gravity center of the to-be-tested screen is calculated and displayed on the display.

Description

Technical Field

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

[0002] The center of gravity is the center of gravity acting on an object. In aerospace, electronics, machinery, and vehicle industries, the position of the center of gravity is often a parameter that needs to be precisely located, especially when support is required. 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 could 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 involves suspending the object from different positions using suspension lines, and the center of gravity is determined by the intersection of two suspension lines. For three-dimensional objects, the center of gravity is the intersection of three suspension lines. However, when applying the suspension line method to detect the center of gravity of three-dimensional objects, especially geometrically irregular shapes, the process is cumbersome and the accuracy is relatively low. Therefore, it is not suitable for measuring the center of gravity of objects with different shapes.

[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 a crucial factor affecting the screen's support and stability, but it has long been neglected, 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 different from the prior art and to improve the above-mentioned shortcomings, the inventors, through years of experience and continuous research and development, have produced this invention.

[0006] To achieve the aforementioned objectives, the screen center of gravity detection device of this invention includes a detection box, a calibration plate, and a detection frame. The detection box has a top surface with a positioning groove. Multiple pressure sensors are distributed on the bottom surface of the positioning groove, and these sensors are connected to a display for transmitting and displaying at least one detection value. The calibration plate is accommodated and positioned within the positioning groove. A central positioning point is located on the surface of the calibration plate, and multiple calibration positioning points are distributed around the central positioning point for placing a weight at each point. The detection frame has a positioning plate for replacing the calibration plate and accommodating and positioning it within the positioning groove. A vertical member is located on the top surface of the positioning plate, and a connecting member is located at the top of the vertical member. The connecting member connects and replaces a calibration screen and a screen to be tested.

[0007] During 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.

[0008] During implementation, four pressure sensors are distributed on the bottom surface of the positioning groove, and the four pressure sensors are located on the inner side of the four first corners respectively.

[0009] During implementation, four calibration positioning points are distributed around the central positioning point of the calibration plate. The four calibration positioning points are located at the four second corners of a virtual quadrilateral, and the four calibration positioning points are equidistant from the central positioning point.

[0010] During implementation, the central positioning point and any one of the four correction positioning points are circular in shape.

[0011] During implementation, the front end of the calibration screen has a flat part, and the midpoint of the flat part is located directly above the center of the center positioning point.

[0012] The detection method of the screen center of gravity detection device of the present invention includes the following steps: A. Placing weights sequentially on multiple 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. 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.

[0013] During implementation, the weights are cylindrical, and the center positioning point of the calibration plate is circular. Before step A, a load cell detection step is also included. After selecting a calibration mode on the display and clicking the zeroing button, the weights are placed inside the circle of the center positioning point to display the weight error value of the weights, thereby determining whether multiple pressure sensors are normal.

[0014] During implementation, the weights are 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. Select a calibration mode on the display, click the zeroing button, and then place the weights inside the circle of the center positioning point for detection. Then, fill the instantaneous value displayed on the display into the center offset value field to offset the instantaneous value. After re-displaying another instantaneous value of the center point of the weights, determine whether the detection box is normal.

[0015] In practice, step A also includes a four-quadrant detection step. After the center origin detection step, the weights are placed sequentially within the circles of the four calibration positioning points on the calibration plate. The instantaneous values ​​are displayed by floating to determine whether there is an abnormality. If an abnormal value is found, the process returns to the center origin detection step to reset the offset value of the weight's center point.

[0016] During implementation, after the calibration plate, upright parts, connectors and calibration screen display an instantaneous value on the monitor, if an abnormal value occurs, return to the center origin detection step and the four quadrant detection step for recalibration.

[0017] During implementation, the weights are cylindrical, the center positioning point of the calibration plate is circular, and the front end of the calibration screen has a flat part with the midpoint of the flat part 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. After clicking the zeroing button, the calibration screen is then installed to perform a second calibration of the device's accuracy.

[0018] The beneficial effects of this invention are as follows: One objective of this invention is to provide a screen center of gravity detection device and its detection 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 line method to measure the center of gravity position. This invention utilizes a structure with a positioning groove on the top surface of a detection box and multiple pressure sensors distributed thereon 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 horizontal screen and the center of gravity value of the screen after rotating it 90 degrees. The result is then displayed on the monitor. This simple, fast, and accurate detection of the screen's center of gravity position provides a reference for screen design and manufacturing, achieving effective support and stability, and extending the service life of the components. Attached Figure Description

[0019] Figure 1 This is an exploded view of the components of the screen center of gravity detection device of the present invention when the calibration plate and the detection box are separated.

[0020] Figure 2 This is a three-dimensional view of the calibration plate of the screen center of gravity detection device of the present invention mounted on the detection box.

[0021] Figure 3 This is an exploded view of the components of the screen center of gravity detection device of the present invention when the detection frame and the detection box are separated.

[0022] Figure 4 This is a three-dimensional view of the screen center of gravity detection device of the present invention mounted on the detection box.

[0023] Figure 5 This is a top view of the screen center of gravity detection device of the present invention mounted on the detection box.

[0024] Figure 6 This is a schematic diagram illustrating the usage state of the screen under test in the present invention when it is horizontally set for measurement.

[0025] Figure 7 This is a schematic diagram showing the usage state of the screen under test when it is vertically set for measurement according to the present invention.

[0026] Figure 8 This is a data graph output by the screen under test after the center of gravity measurement according to the present invention.

[0027] Explanation of reference numerals in the attached figures: 1: Screen center of gravity detection device 2: Testing box 21: Top face 211: Side 212: Positioning groove 213: First side 214: Pressure sensor 22: Monitor 3: Calibration plate 31: Center Positioning Point 32: Correction positioning point 33: Virtual Quadrilateral 34: Second angle 4: Testing frame 41: Positioning plate 42: Upright component 43: Connector 431: Locking component 9: Weights 91: Calibrate the screen 911: Planar Section 92: Screen to be tested M: Midpoint. Detailed Implementation

[0028] To further understand the present invention, preferred embodiments are described below, along with accompanying drawings and reference numerals, to explain in detail the specific composition of the present invention and the effects it achieves: 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. Multiple pressure sensors are distributed on the bottom surface of the positioning groove. The multiple 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 and multiple 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, and the top of the upright member has a connector. The connector is first connected to a calibration screen for calibration, and then replaced with a screen to be tested for center of gravity detection.

[0029] Please see Figures 1-7As shown, this is a preferred embodiment 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, designed to be placed flat on a rigid table. In practice, the detection box 2 contains a level to ensure that the angle at which the detection box 2 is placed flat is between 0 degrees and ±0.2 degrees, thus ensuring accurate positioning. The upper end 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, which together form a positioning groove 212. The four corners of the four side plates 211 respectively form four first corners 213. The bottom surface of the positioning groove 212 is provided with four pressure sensors 214, which are located inside the four first corners 213. The four pressure sensors 214 are connected to a display 22 so that after each pressure sensor 214 performs detection, the detection values ​​or values ​​calculated by a processor are transmitted and displayed on the display 22.

[0030] The calibration plate 3 is a square flat plate with the same shape as the positioning groove 212, so as to accommodate and position the calibration plate 3 within the positioning groove 212. The surface of the calibration plate 3 has a circular central positioning point 31, and four calibration positioning points 32 are distributed around the central positioning point 31. The four calibration positioning points 32 are circular, 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 centers of the four calibration positioning points 32 are 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.

[0031] 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, replacing the calibration plate 3 and being 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 a vertical plate, which serves as the connecting member 43. The connecting member 43 has four locking members 431 arranged at the corners of a square, 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. In addition, the front end of the calibration screen 91 has a flat part 911. After the connector 43 is locked to the calibration screen 91, the middle point M of the flat part 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.

[0032] Based on the structure of the screen center of gravity detection device 1 described above, as follows Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, 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 the multiple calibration positioning points 32 of the calibration plate 3 to perform the first calibration of the device's 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, aligning the screen under test 92 horizontally. Then, press a horizontal measurement button on the display 22 to display and record the values ​​(X, Z1) of a first centroid point of the screen under test 92; and D. After rotating the screen 92 under test by 90 degrees, click a vertical measurement button on the display 22 to display and record the value (Y, Z2) of a second center of gravity of the screen 92 under test. 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 display.

[0033] In step A, the weight 9 is cylindrical, with an outer diameter identical in size to the circles of the central positioning point 31 and each calibration positioning point 32; the weight 9 weighs 0.5 kg. Before step A, a load cell detection step is included. First, a calibration mode is selected on the display 92, then the zeroing button is clicked. Next, the weight 9 is placed within the circle of the central positioning point 31 to display the weight error value of the weight 9. This allows for the determination of whether the multiple pressure sensors 214 are functioning correctly. 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.

[0034] 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 within the circle of the center positioning point 31 for detection. At this time, an instantaneous value (Bx, Bz) will be displayed on the display 92. 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), (+3.95mm, +0.2mm) is entered in the center offset value field. After the instantaneous value (Bx, Bz) of the center point of the weight 9 is re-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.

[0035] After the center origin detection is correct, the four-quadrant detection step is performed next. Weights 9 are placed sequentially within the circles of the four calibration positioning points 32 on the calibration plate 3, and their instantaneous values ​​(Bx, Bz) are displayed. The values ​​displayed for each instantaneous value (Bx, Bz) are then used to determine if the detection box 2 has any abnormalities. 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 outside ±1.5mm, it is considered an abnormal state, and the process must return to the center origin detection step. After resetting the center point offset value, the four-quadrant detection step is repeated.

[0036] In step B, the calibration screen 91 is made of transparent acrylic with uniform material. After removing the calibration plate 3 and replacing it with the positioning plate 41 of the testing frame 4, a support mode is displayed on the monitor 22. After clicking the zeroing button, the calibration screen 91 is locked in place with the connector 43, so that the calibration screen 91 is set in a horizontal direction. At the same time, the support mode offset values ​​(Px, Pz) are set so that Px < ±0.5mm and Pz = 8.5mm ± 0.5mm for 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. In addition, during the test, an instantaneous value (Px, Pz) will be displayed floating on the monitor 22. If an abnormal value occurs, such as the measured value exceeding ±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.

[0037] 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 92 under test, the processor calculates the center of gravity of the screen 92 under test based on the two sets of data using the principle of torque balance, and outputs the result on the display 22. Figure 8 As shown.

[0038] In summary, based on the above disclosure, the calibration plate of this invention is positioned within the positioning groove of the testing box. With a weight placed on the center positioning point and four calibration positioning points of the calibration plate, the first accuracy calibration of the testing box can be performed. By replacing the testing frame and positioning its positioning plate within 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 the testing box is functioning correctly, 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 of the screen. This not only provides a reference for screen design and manufacturing to achieve effective support and stability, extending the service life of components, but also enables rapid quality control inspection, improving efficiency and saving labor costs. Therefore, this invention has significant industrial value.

[0039] While the present invention discloses preferred embodiments to achieve the above objectives, these are not intended to limit the structural features of the invention. Anyone skilled in the art should understand that any easily conceived variations or modifications are possible within the spirit of the invention and are all covered by the claims of the present invention.

Claims

1. A screen center of gravity detection device, characterized in that, include: A detection box has a top surface with a positioning groove. Multiple pressure sensors are distributed on the bottom surface of the positioning groove. The multiple pressure sensors are connected to a display for transmitting and displaying at least one detection value. A calibration plate, which is accommodated and positioned within a positioning groove, has a central positioning point on its surface, and a plurality of calibration positioning points are distributed around the central positioning point for placing a weight at each point; and A testing frame has a positioning plate for replacing the calibration plate to be accommodated and positioned in the positioning groove. The top surface of the positioning plate has an upright member, and the top of the upright member has a connector for connecting and replacing a calibration screen and a screen to be tested.

2. The screen center of gravity detection device as described in claim 1, characterized in that, 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 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 described in claim 2, characterized in that, The bottom surface of the positioning groove is provided with four pressure sensors, which are located on the inner side of the four first corners respectively.

4. The screen center of gravity detection device as described in claim 1, characterized in that, The calibration plate has four calibration positioning points distributed around the central positioning point. The four calibration positioning points are located at the four second corners of a virtual quadrilateral, and the four calibration positioning points are equidistant from the central positioning point.

5. The screen center of gravity detection device as described in claim 4, characterized in that, The central positioning point and any one of the four correction positioning points are each in the shape of a circle.

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

7. A detection method for a screen center of gravity detection device as described in any one of claims 1 to 6, characterized in that, Includes the following steps: A. Place the weight sequentially on multiple calibration positioning points of the calibration plate to perform the first calibration of the device's accuracy; B. After the first calibration is completed, the calibration plate is removed and replaced with the positioning plate. The connector is connected to the calibration screen, and a support mode is displayed on the display to perform a second calibration of the device accuracy. C. After the second calibration is completed, remove the calibration screen and connect the screen under test, make the screen under test horizontal, and then click a horizontal measurement button on the monitor to display and record the value of the first centroid point of the screen under test. as well as D. After rotating the screen under test by 90 degrees, click a vertical measurement button on the monitor to display and record the value of a second center of gravity of the screen under test. At the same time, calculate the center of gravity of the screen under test based on the values ​​of the first center of gravity and the second center of gravity, and display it on the monitor.

8. The detection method of the screen center of gravity detection device as described in claim 7, characterized in that, The weight is cylindrical, and the center positioning point of the calibration plate is circular. Before step A, a load cell detection step is also included. A calibration mode is selected on the display. After clicking the zeroing button, the weight is placed 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.

9. The detection method of the screen center of gravity detection device as described in claim 7, characterized in that, 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. After selecting a calibration mode on the display and clicking the zeroing button, the weight is placed inside the circle of the center positioning point for detection. Then, an instantaneous value displayed on the display is entered into a center offset value field to offset the instantaneous value. After another instantaneous value of the center point of the weight is displayed again, it is determined whether the detection box is normal.

10. The detection method of the screen center of gravity detection device as described in claim 9, characterized in that, Step A also includes a four-quadrant detection step. After the center origin detection step, the weight is placed sequentially within the circles of the four calibration positioning points on the calibration plate. The instantaneous values ​​are displayed by floating to determine whether there is an abnormality. If an abnormal value is found, the process 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, characterized in that, After the calibration plate, the upright component, the connector, and the calibration screen display an instantaneous value on the monitor, 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, characterized in that, 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 which is located directly above the center of the circle of the center positioning point. In step B, the calibration plate, the upright member and the connecting member are positioned first, and after clicking the zeroing button, the calibration screen is installed to perform a second calibration of the device accuracy.

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