Human body scale four-corner measurement value deviation automatic testing machine

Abstract

The utility model provides a human body scale four-corner measurement value deviation automatic testing machine. The human body scale four-corner measurement value deviation automatic testing machine comprises a rack, a conveying belt, a centering device and a weight loading device. The conveying belt is used for automatically conveying a to-be-tested human body scale into a test area; the centering device accurately controls the movement of a first positioning plate, a second positioning plate, an X-axis positioning rod and a Y-axis positioning rod, so as to achieve the centering and positioning of the human body scale. The weight loading device accurately controls the weights to load the weights with different weights on the four corners of the human body scale through the cooperative work of the second X-axis driving assembly and the second Y-axis driving assembly, detects the weight output value of the human body scale in real time, and compares the weight output value with the actual weight of the weights, thereby accurately measuring the deviation of the measured values of the four corners of the human body scale. The device has the advantages of high test precision, fast test speed, simple operation and the like, can automatically, accurately and efficiently detect the deviation of the four-corner measured values of the human body scale, and meets the test requirements of different models of human body scales.

Description

Technical Field

[0001] This utility model relates to the field of body scale testing technology, and in particular to an automatic testing machine for the deviation of the four corner measurement values ​​of a body scale. Background Technology

[0002] The deviation of the four corner measurements is one of the important indicators for evaluating the quality of a body scale. It reflects whether the measurements at the four corners are consistent when the scale is bearing weight. If the deviation of the four corner measurements is too large, it will directly affect the accuracy and stability of the body scale. The current method for automatically measuring the four corner deviation of body scales is as follows: the device is equipped with four weights, which are arranged around the four sides, corresponding to the upper left, lower left, upper right, and lower right corners of the body scale. During testing, the device places the four weights one by one, and the machine vision system detects the readings on the body scale's display screen to obtain the deviation of the four corner measurements. When the product needs to be changed, since the contact area between the bottom of the weights and the body scale is large, and the external dimensions of different body scale models do not change much, the spacing between the weights is generally not changed. However, in reality, the loading position is different, the lever arm changes, and the loading force will also be different, which will introduce a certain amount of measurement error. When calculating the loading value, this type of device multiplies the weight of the weight by the local gravitational acceleration to obtain the loading force. Although the weight is calibrated every once in a while, the force applied each time is not the same due to the friction between the weight and the device, which can lead to measurement errors.

[0003] Chinese patent publication CN210242970U discloses a weight-pressing machine that uses a conveying mechanism to raise and lower a set of weights, a positioning device to position a body scale, and a control module to control the entire testing process. However, this weight-pressing machine mainly focuses on testing the overall load-bearing capacity of the body scale, and is not accurate or efficient enough in detecting the deviation of the measurement values ​​at the four corners of the body scale.

[0004] Therefore, it is particularly important to develop a testing machine that can automatically, accurately, and efficiently detect the deviation of the measurement values ​​at the four corners of a body scale. Utility Model Content

[0005] The present invention aims to provide a novel automatic testing machine for the deviation of the four corner measurements of a body scale, in order to solve the problems of cumbersome operation, low testing efficiency and inaccurate test results of existing weight machines when testing the deviation of the four corner measurements of a body scale.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An automatic testing machine for the deviation of the four corner measurement values ​​of a body scale includes a frame 100. The frame 100 is equipped with a conveyor belt 1 for automatically feeding the body scale to be tested into the testing area, a centering and positioning device 2 for centering and positioning the body scale, and a weight loading device 3 for loading weights of different weights at the four corners of the body scale. The weight loading device 3 includes at least a weight 310, and the bottom of the weight 310 is connected to a test sensor 320 that is in contact with the surface of the body scale when the weight is loaded and is used to detect the weight output value of the body scale after the weight is loaded.

[0008] Preferably, the centering and positioning device 2 includes: a support base 21 mounted on the frame 100; the support base 21 has a longitudinal guide rail 211 on its top surface and a transverse guide rail 212 on its bottom surface, and a first positioning plate 22 is slidably connected to the longitudinal guide rail 211, and a second positioning plate 23 is slidably connected to the transverse guide rail 212; the support base 21 has a Y-axis positioning drive assembly 24 connected to its front side to drive the first positioning plate 22 to slide along the longitudinal guide rail 211, and an X-axis positioning drive assembly 25 connected to its right side to drive the second positioning plate 23 to slide along the transverse guide rail 212.

[0009] Preferably, the support base 21 has a first auxiliary guide rail 213 longitudinally arranged near the four corners of its bottom surface, and the first auxiliary guide rail 213 is slidably connected to a Y-axis positioning rod 26 that moves along its longitudinal direction; the support base 21 has a second auxiliary guide rail 214 transversely arranged near the four corners of its top surface, and the second auxiliary guide rail 214 is slidably connected to an X-axis positioning rod 27 that moves along its transverse direction; a first transmission structure for driving the X-axis positioning rod 27 to retract inward and expand outward in the longitudinal direction is provided between the Y-axis positioning drive assembly 24 and the X-axis positioning rod 27; a second transmission structure for driving the Y-axis positioning rod 26 to retract inward and expand outward in the longitudinal direction is provided between the X-axis positioning drive assembly 25 and the Y-axis positioning rod 26.

[0010] Preferably, the first transmission structure includes: a first pulley 271 connected to the X-axis positioning rod 27, and a first groove 221 provided near the corner of the first positioning plate 22, extending obliquely outward from front to back; the second transmission structure includes: a second pulley 261 connected to the Y-axis positioning rod 26, and a second groove 231 provided near the corner of the second positioning plate 23, extending obliquely from left to right towards the center of the second positioning plate 23.

[0011] Preferably, the first transmission structure includes: a first pulley 271 connected to the X-axis positioning rod 27, and a first groove 221 that extends obliquely outward from front to back and is located near the corner of the first positioning plate 22; the second transmission structure includes: a second pulley 261 connected to the Y-axis positioning rod 26, and a second groove 231 that extends obliquely inward from left to right and is located near the corner of the second positioning plate 23.

[0012] Preferably, the support base 21 is also provided with a positioning sensor 28 for detecting whether the body scale is in position.

[0013] Preferably, the X-axis positioning rod 27 is connected to a positioning wheel 291 capable of lifting and lowering, and a lifting cylinder 292 that drives the positioning wheel 291 to lift and lower.

[0014] Preferably, the weight loading device 3 includes a bracket 31 mounted on the frame 100 and located above the centering and positioning device 2. The bracket 31 is connected to a first support plate 32. A second X-axis drive assembly 33 is horizontally mounted on the first support plate 32. A second support plate 34 is connected above the second X-axis drive assembly 33. The second support plate 34 is connected to a third support plate 36 via a second Y-axis drive assembly 35. The third support plate 36 is provided with four weight drive assemblies 37, which are respectively used to drive the weights 310 downward to load weights onto the four corners of the body scale. Each weight drive assembly 37 is connected to one weight 310.

[0015] Preferably, each second support plate 34 is connected to an L-shaped vertical mounting base 38, the vertical mounting base 38 is provided with a vertical guide rail 39, and each weight 310 is connected to a slider 40 that moves along the corresponding vertical guide rail 39.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The automatic testing machine for the four-corner measurement deviation of the human body scale of this utility model uses a weight loading device to precisely control the weight loading device, load weights of different weights at the four corners of the human body scale, and add a test sensor at the bottom of the weights to directly measure the pressure of the weights on the human body scale. By comparing the output of the weight test sensor and the human body scale sensor, the four-corner deviation of the human body scale can be calculated more accurately, avoiding measurement errors caused by fixed weight spacing and inconsistent loading force, and improving the accuracy of the test.

[0018] 2. By adding a guide rail and slider combination to the weight position, this utility model ensures that the weight is loaded at the same position every time, providing a strong guarantee for the repeatability of the data collection.

[0019] 3. This utility model, through the design of a centering and positioning device and its pulley and groove structure, enables product centering and positioning using only two drive components. No adjustments are required during model changes, allowing for rapid completion of the testing process, improving testing efficiency, and reducing labor costs. Furthermore, both the centering and positioning device and the weight loading device can be adjusted according to the size and model of the scale being tested to adapt to the testing needs of different scale models. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the centering and positioning device of this utility model, viewed from above.

[0022] Figure 3 This is a three-dimensional structural diagram of the centering and positioning device of this utility model, viewed from above and with some parts of the structure hidden.

[0023] Figure 4 This is a three-dimensional structural diagram of the centering and positioning device of this utility model, viewed from below.

[0024] Figure 5 This is a three-dimensional structural diagram of the centering and positioning device of this utility model, viewed from below and with some parts of the structure hidden.

[0025] Figure 6 This is a three-dimensional structural diagram of the weight loading device of this utility model;

[0026] Figure 7 This is a partial structural schematic diagram of the weight loading device of this utility model;

[0027] Figure 8 This utility model Figure 7 Enlarged diagram of point A. Detailed Implementation

[0028] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 8 As shown in the figure, the present invention provides an automatic testing machine for measuring the deviation of the four corners of a body scale. This embodiment provides an automatic testing machine for measuring the deviation of the four corners of a body scale, which is used to automatically test the measurement deviation of the body scale when different weights are loaded at the four corners.

[0030] The automatic testing machine of this case includes a frame 100, and a conveyor belt 1, a centering and positioning device 2, and a weight loading device 3 mounted on the frame 100. The frame 100 is used to support and fix all the components of the testing machine. The conveyor belt 1 is arranged laterally and is used to automatically feed the body scale 200 to be tested into the testing area. The conveyor belt 1 can be set to cyclical motion for continuous testing. The centering and positioning device 2 is used to center and position the body scale, ensuring that the body scale is accurately located in the center of the testing area during testing.

[0031] Specifically, the centering and positioning device 2 is used to load weights of different weights at the four corners of the body scale to test its measurement deviation. The centering and positioning device 2 includes a support base 21 mounted on the frame 100. The support base 21 is provided with a longitudinal guide rail 211 and a transverse guide rail 212, and a first positioning plate 22 and a second positioning plate 23 are slidably connected to the longitudinal guide rail 211 and the transverse guide rail 212, respectively. A Y-axis positioning drive assembly 24 is connected to the front side of the support base 21 to drive the first positioning plate 22 to slide along the longitudinal guide rail 211; an X-axis positioning drive assembly 25 is provided on the right side of the support base 21 to drive the second positioning plate 23 to slide along the transverse guide rail 212. In addition, a first auxiliary guide rail 213 is provided near the four corners of the bottom surface of the support base 21, and a Y-axis positioning rod 26 is slidably connected to it; a second auxiliary guide rail 214 is provided near the four corners of the top surface, and an X-axis positioning rod 27 is slidably connected to it. A first transmission structure is provided between the Y-axis positioning drive assembly 24 and the X-axis positioning rod 27, and a second transmission structure is provided between the X-axis positioning drive assembly 25 and the Y-axis positioning rod 26. These structures drive the X-axis positioning rod 27 and the Y-axis positioning rod 26 to retract inward and expand outward, thereby achieving centering positioning of the body scale. The first and second transmission structures respectively include a first pulley 271 and a second pulley 261 connected to the X-axis positioning rod 27 and the Y-axis positioning rod 26, and a first groove 221 and a second groove 231 provided on the first positioning plate 22 and the second positioning plate 23. A positioning sensor 28 is also provided on the support base 21 to detect whether the body scale is in position. A positioning wheel 291 and a lifting cylinder 292 are connected to the X-axis positioning rod 27. The positioning wheel 291 can be raised and lowered under the drive of the lifting cylinder 292 to provide additional support and positioning during body scale centering. The X-axis positioning drive assembly and the Y-axis positioning drive assembly can be linear motor modules or cylinders, etc.

[0032] Specifically, the weight loading device 3 includes a bracket 31 mounted on the frame 100 and located above the centering and positioning device 2. A first support plate 32 is connected to the bracket 31, and a second X-axis drive assembly 33 is horizontally mounted on the first support plate 32. A second support plate 34 is connected above the second X-axis drive assembly 33, and the second support plate 34 is connected to a third support plate 36 via a second Y-axis drive assembly 35. Four weight drive assemblies 37 are provided on the third support plate 36, and each weight drive assembly 37 is connected to a weight 310. A test sensor 320 is mounted on the bottom of the weight 310 via a connector. This test sensor 320 is used not only to detect the weight output value of the body scale after the weight is loaded, but can also be a pressure sensor to verify the accuracy of the body scale. Each second support plate 34 is connected to an L-shaped vertical mounting base 38, which is equipped with a vertical guide rail 39. Each weight 310 is connected to a slider 40 that moves along the corresponding vertical guide rail 39 to ensure smooth and accurate movement during loading and unloading. In addition to the weight loading device 3, a probe and a device for driving the probe downwards can be added during testing. The probe is used to detect the resistance of the body scale to verify its impedance. The device for driving the probe downwards can achieve precise pressing and lifting of the probe using a motor or cylinder.

[0033] When the weights are loaded, the second X-axis drive assembly 33 and the second Y-axis drive assembly 35 work together to drive the third support plate 36 to move in the X and Y axes, and with the precise control of the weight drive assembly 37, the weights 310 can be accurately loaded onto the four corners of the body scale. At the same time, the test sensor 320 detects the weight output value of the body scale in real time and compares it with the actual weight of the weights.

[0034] The working principle of the automatic testing machine in this case is as follows:

[0035] The operator selects the product model to be processed on the PC, and the host computer software sends the external dimensions of the body scale and the position information of the solder pads to the automatic testing machine.

[0036] The body scale to be tested automatically flows into the centering and positioning device 2 on the conveyor belt 1 and is detected by the positioning sensor 28 of the centering and positioning device 2. At this time, the conveyor belt 1 stops, and the Y-axis positioning drive assembly 24 and the X-axis positioning drive assembly 25 drive the first positioning plate 22 and the second positioning plate 23 to move, respectively. At the same time, the first transmission structure and the second transmission structure drive the X-axis positioning rod 27 and the Y-axis positioning rod 26 to retract inward, so that the body scale completes the centering and positioning. The positioning sensor 28 detects whether the body scale is in position. If it is in position, the subsequent testing process is started.

[0037] The weight driving component 37 of the weight loading device 3 is activated, driving the weight 310 and the test sensor 320 to move to the four corners of the scale and loading weights of different weights respectively. During the loading process, the weight driving component of the device is activated, driving the weight to move along the X and Y axes, so that the weight 310 is moved to the correct position.

[0038] After all weights are loaded, the pre-compression process is completed. Simultaneously, an additional probe and a device to drive the probe downwards are used to detect the resistance of the body scale, checking if the current impedance is within acceptable limits. If it is not within acceptable limits, the scale is rejected; if it is within acceptable limits, the testing continues.

[0039] Unload some weights and switch the device to strain gauge bridge mode. Record the output of the currently loaded weights and compare it with the output of the 320 sensor and the body scale. Then, unload and load other weights in sequence to complete the test data recording for four weights.

[0040] After the test is completed, all weights are unloaded and the centering and positioning device is released. Conveyor belt 1 starts, transporting the tested body scale to the next device and the next body scale to be tested to the centering and positioning device 2, thus starting the test of the next body scale.

[0041] As can be seen from the above embodiments, the automatic testing machine for the four-corner measurement deviation of the body scale of the present invention can automatically test the measurement deviation when different weights are loaded at the four corners of the body scale, and has the advantages of high testing accuracy, fast testing speed, and simple operation. At the same time, the centering positioning device and the weight loading device of the testing machine are reasonably designed to ensure the stability and accuracy of the test.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A human body scale four corner measurement value deviation automatic testing machine, comprising a rack (100), characterized in that, The rack (100) is provided with a conveying belt (1) for automatically feeding a body scale to be tested into a test area, a centering positioning device (2) for centering and positioning the body scale, and a weight loading device (3) for loading different weights on the four corners of the body scale.

2. The automatic test machine for four corner measurement deviation of a body scale according to claim 1, wherein The centering positioning device (2) comprises a support seat (21) mounted on the rack (100), the support seat (21) is provided with a longitudinal guide rail (211) on the top surface and a transverse guide rail (212) on the bottom surface, and is slidably connected with a first positioning plate (22) through the longitudinal guide rail (211) and a second positioning plate (23) through the transverse guide rail (212); the support seat (21) is connected with a Y-axis positioning drive assembly (24) on the front side for driving the first positioning plate (22) to slide along the longitudinal guide rail (211), and is provided with an X-axis positioning drive assembly (25) on the right side for driving the second positioning plate (23) to slide along the transverse guide rail (212).

3. The body weight scale four corner measurement value deviation automatic testing machine according to claim 2, characterized in that, The support seat (21) is longitudinally provided with a first auxiliary guide rail (213) near the four corners on the bottom surface, the first auxiliary guide rail (213) is slidably connected with a Y-axis positioning rod (26) moving along the longitudinal direction; the support seat (21) is transversely provided with a second auxiliary guide rail (214) near the four corners on the top surface, the second auxiliary guide rail (214) is slidably connected with an X-axis positioning rod (27) moving along the transverse direction; a first transmission structure is arranged between the Y-axis positioning drive assembly (24) and the X-axis positioning rod (27) for driving the X-axis positioning rod (27) to shrink inward and expand outward in the longitudinal direction; a second transmission structure is arranged between the X-axis positioning drive assembly (25) and the Y-axis positioning rod (26) for driving the Y-axis positioning rod (26) to shrink inward and expand outward in the longitudinal direction.

4. The body weight scale four corner measurement value deviation automatic testing machine according to claim 3, characterized in that, The first transmission structure comprises a first pulley (271) connected to the X-axis positioning rod (27) and a first sliding groove (221) extending obliquely from front to back and outward at a position near the corner of the first positioning plate (22); the second transmission structure comprises a second pulley (261) connected to the Y-axis positioning rod (26) and a second sliding groove (231) extending obliquely from left to right and towards the center of the second positioning plate (23) at a position near the corner of the second positioning plate (23).

5. The body weight scale four corner measurement value deviation automatic testing machine according to claim 3, characterized in that, The first transmission structure comprises a first pulley (271) connected to the X-axis positioning rod (27) and a first sliding groove (221) extending obliquely from front to back and outward at a position near the corner of the first positioning plate (22); the second transmission structure comprises a second pulley (261) connected to the Y-axis positioning rod (26) and a second sliding groove (231) extending obliquely from left to right and inward at a position near the corner of the second positioning plate (23).

6. The automatic test machine for the four corner measurements deviation of a body scale according to claim 2 or 3 or 4, wherein, The support base (21) is further provided with a position sensor (28) for detecting whether the body scale is in place.

7. The body weight scale four corner measurement value deviation automatic testing machine according to claim 5, characterized in that, The X-axis positioning rod (27) is connected with a positioning wheel (291) capable of lifting movement, and a jacking cylinder (292) for driving the positioning wheel (291) to lift.

8. The automatic test machine for four corner measurement deviation of a body scale according to claim 1, wherein The weight loading device (3) comprises a support (31) erected on the rack (100) and located above the centering positioning device (2), the support (31) is connected with a first support plate (32), the first support plate (32) is transversely provided with a second X-axis driving assembly (33), the second X-axis driving assembly (33) is connected with a second support plate (34) above, the second support plate (34) is connected with a third support plate (36) through a second Y-axis driving assembly (35), the third support plate (36) is provided with four weight driving assemblies (37) respectively for driving the weights (310) to load weight downward to four corners of the body scale, and each weight driving assembly (37) is connected with one weight (310).

9. The body weight scale quadrantal measurement deviation automatic testing machine according to claim 8, characterized in that, Each second support plate (34) is connected with an L-shaped vertical mounting seat (38), the vertical mounting seat (38) is provided with a vertical guide rail (39), and each weight (310) is connected with a sliding block (40) moving along the corresponding vertical guide rail (39).

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