Non-contact body type measuring device

Abstract

The utility model discloses a non-contact body type measuring device, which comprises a bottom plate, a support column, a top plate, a rotating pair, a moving pair and a distance measuring sensor, the bottom plate is connected with a top plate through supporting columns, and a rotating pair and a moving pair are installed on the top of the top plate. The distance measuring sensor is installed on a vertically-arranged moving pair and moves up and down. According to the utility model, a single distance sensor is used for detection, and external contour data of a to-be-detected body can be obtained in a non-contact manner. The acquisition device has the characteristics of simple mechanical structure and large amount of information of acquired data, and after the acquired data is simply processed, a three-dimensional external contour point cloud data matrix reflecting a to-be-measured body or size data between to-be-measured feature points can be accurately and meticulously obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of human body measurement, and in particular relates to a non-contact body shape measuring device. Background Art

[0002] The apparel industry sometimes needs to design personalized, comfortable clothing based on the customer's body data. In addition, the selection of athletes also requires obtaining the candidate's body data. All of these require accurate data collection or measurement of the overall or local contours or dimensions of the human body.

[0003] However, current methods for collecting contour data in these fields, particularly human contours, mostly rely on direct measurement with a tape measure or simple image acquisition followed by a 3D reconstruction algorithm to generate contour data. While these methods are fast, they collect small amounts of data, making them insufficient for accurately and meticulously recreating the true external contours of the object being measured. Utility Model Content

[0004] To overcome the aforementioned problems of the prior art, the present invention aims to provide a non-contact body shape measurement device that utilizes a single distance sensor to non-contactly acquire the external contour data of an object. This acquisition device features a simple mechanical structure and a large amount of collected data. After simple processing, the collected data can be accurately and meticulously obtained into a point cloud data matrix reflecting the three-dimensional external contour of the object or the dimensional data between the measured feature points.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A non-contact body shape measuring device includes a base plate 1, a support 2, a top plate 3, a rotating pair 4, a moving pair 5, and a distance sensor 6;

[0007] The bottom plate 1 is connected to the top plate 3 through the support 2, and the top of the top plate 3 is equipped with a rotating pair 4 and a moving pair 5;

[0008] The distance measuring sensor 6 is mounted on the vertically arranged moving pair 5 and moves up and down.

[0009] The rotating pair 4 includes a servo motor 7, which is mounted on the surface of the top plate 3. The servo motor 7 is connected to the upper end of the rotating shaft B9 through a coupling A8, and the lower end of the rotating shaft B9 is connected to the synchronous wheel B12. Two vertical seat bearings 10 are set on the rotating shaft B9 between the coupling A8 and the synchronous wheel B12; the vertical seat bearings 10 of the rotating shaft B9 are fixed to the side surface of the fixed plate 11 of the rotating shaft B by bolts; the synchronous wheel B12 is horizontally connected to the synchronous wheel A15 through a synchronous belt 14, and the synchronous wheel A15 is connected to the rotating shaft A17 through a center hole. A positioning and fastening ring C18 is installed on the top of the rotating shaft A17, and the top of the positioning and fastening ring C18 is close to the rotating plate 20. The rotating shaft A17 is supported by two flange-mounted bearings 19, and the flange-mounted bearings 19 are respectively fixed on the lower surface of the top plate 3 and the upper surface of the bottom plate 1. The top of the rotating shaft A17 is connected to the rotating plate 20, and the transmission is carried out by setting a key 21 on the top of the rotating shaft A17. A zero screw 22 is set at the bottom of the edge of the rotating plate 20, which is used in conjunction with a magnetic contact switch sensor 23. The magnetic contact switch sensor 23 is installed on the upper surface of the top plate 3.

[0010] The moving pair 5 includes a long strip plate 24 installed on the upper surface of the top plate 3, a linear module slide 25 is arranged along the surface of the long strip plate 24, a coupling 26 and a servo motor B27 are arranged on the top of the long strip plate 24, three photoelectric switches 28 are installed on the long strip plate 24, one is installed on the upper side and two are installed on the lower side, and a distance sensor mounting plate 31 and a positioning piece 30 are arranged on the linear module slide 25.

[0011] The rotating pair 4 includes a swivel plate 20, and the moving pair 5 includes a linear module slide 25. The central rotating axis of the swivel plate 20 of the rotating pair 4 and the moving axis of the moving slider of the linear module slide 25 of the moving pair 5 are parallel to each other. The movements of the two are independent of each other and do not affect each other. The mounting plate 31 of the ranging sensor 6 is fixed on the moving slider of the linear module slide 25.

[0012] The linear module slide 25 converts the motor rotation into linear motion of the moving slider. The positioning piece 30 is a thin aluminum alloy sheet with an N-shaped cross-section, which is fixed to the side of the moving slider of the linear module slide 25. The distance sensor mounting plate 31 has an L-shaped cross-section and is fixed on the top of the moving slider of the linear module slide 25.

[0013] The photoelectric switch 28 is mounted on the long plate 24 via a photoelectric switch fixing plate 29. The bottom plate 1 is a circular thick metal plate, and three pillars 2 arranged in an equilateral triangle are fastened to the bottom plate 1 at its edge by screw threads.

[0014] The flanged seat bearing 19 on the upper side of the revolving pair 4 is also bolted to the lower surface of the top plate 3. The top plate 3 has a circular hole in its center through which the rotating shaft A17 extends upward, supporting and connecting the slewing plate 20. A threaded hole in the top plate 3 is used to secure the angular zero-position magnetic contact switch sensor 23 of the slewing plate 20. The slewing plate 20 is a disc-shaped structure, and to increase its rigidity, transverse ribs are welded to its lower surface in both the horizontal and vertical directions.

[0015] The cross-section of the fixing plate 11 is close to an L-shape, the upper surface of which is fixed to the lower surface of the top plate 3 by bolts, and the side surface of which is fixed to two vertical seated bearings 10 supporting the rotating shaft B9 by bolts.

[0016] Beneficial effects of the utility model:

[0017] The present invention can be used to generate point cloud data for overall and local surface measurements of the outer contours of human bodies and objects, and can also be used to measure the distances between several characteristic points on human bodies and objects. When measuring the overall and local contours, a slider carrying a distance-measuring sensor is first manually and electrically moved up and down to determine the scanning range. Then, the slider is automatically and electrically moved and the turntable is slowly rotated to scan the body layer by layer, thereby obtaining point cloud data for each layer of the outer contour. Based on the point cloud data, relevant geometric parameters of the human body or object are obtained, which can be used for refined clothing design or precise selection of athlete qualifications, or for generating surfaces based on the point cloud data for replica mold design. When measuring characteristic points on human bodies and objects, servo motor B is driven to move the slider carrying the distance-measuring sensor up and down, and servo motor A is driven to slowly rotate the turntable. The coordinates of several characteristic points on the human body or object can be measured, and through simple calculations, relevant geometric parameters of the human body or object, such as height, chest circumference, waist circumference, and leg length, can be obtained for use in clothing design or athlete selection.

[0018] Because both the moving pair and the rotary pair are driven by precision servo motors, the single-pulse travel distance of the moving pair and the single-pulse rotation angle of the rotary pair can be set using the servo driver parameters. Since the servo's positioning accuracy depends on the resolution of the encoder on the servo motor, for example, a 2500-line incremental encoder can achieve a positioning accuracy of ±0.036 degrees after quadruple frequency processing, with no error accumulation. Therefore, using this device to measure the human body or object can generate massive amounts of contour point cloud data, and after simple processing, a precise and delicate contour surface can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall schematic diagram of a non-contact body shape measurement device.

[0020] Figure 2 This is a partial structural diagram of the rotating pair of a non-contact body shape measurement device.

[0021] Figure 3 This is a partial structural diagram of the moving pair of a non-contact body shape measurement device. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below with reference to the accompanying drawings.

[0023] A non-contact body shape measuring device, as shown in the following Figure 1-Figure 3 As shown, the revolving pair 4 is primarily used to rotate the circular rotating plate carrying people or objects about its central axis. It consists of a servo motor A7, a coupling A8, a rotating shaft B9, two vertical bearing units 10, a fixed plate 11 for rotating shaft B, a synchronous pulley B12, a retaining ring B13, a timing belt 14, a synchronous pulley A15, a retaining ring A16, a rotating shaft A17, a retaining ring C18, a flanged bearing unit 19, a rotating plate 20, a key 21, a zero screw 22, and a magnetic contact switch sensor 23. Servo motor A7 is a servo motor with an encoder. Its shaft drives the revolving pair 4, precisely controlling the speed and angular displacement of the main axis of the revolving pair 4, namely, rotating shaft A17. A coupling securely connects the servo motor A7 shaft and rotating shaft B9, enabling their joint rotation. Two vertical bearing units 10 support the rotating shaft B9, reducing friction during its movement and ensuring its rotational accuracy. The inner diameter of the bearings and the rotating shaft B9 form an interference fit. The vertical bearing units 10 are fixed to the fixing plate 11 of the rotating shaft B9 by bolts.

[0024] The lower end of rotating shaft B9 is inserted into the axial hole of the small-diameter synchronous pulley B12 with an interference fit. The lower end is secured by a locating and fastening ring B13 to prevent longitudinal movement. Synchronous pulley B12 transmits and reduces rotational motion to the larger-diameter synchronous pulley A15 via a timing belt 14. The lower end of rotating shaft A17 is inserted into the axial hole of synchronous pulley A15 with an interference fit. The lower end is secured by a locating and fastening ring A16 to prevent longitudinal movement. The upper and lower ends of rotating shaft A17 are supported by two flanged bearings 19 fixed to the bottom and top plates, respectively. The upper end of rotating shaft A17 extends through the center hole of the top plate and inserts into the center hole of the slewing plate 20. The two are connected by a key 21 and secured by a fastening ring C18 to prevent downward movement of rotating shaft A17. The upper layer of the slewing plate 20 is a circular structure, while the lower layer is composed of two vertically arranged long strips. These two layers are welded together to form a single unit, enhancing the rigidity of the slewing plate 20. Driven by the slewing pair 4, the slewing plate 20 rotates. The zero screw 22 is threadedly connected to the slewing plate 20. The magnetic contact switch sensor 23 is fixed to the top plate through a threaded through-hole in the top plate. The magnetic contact switch sensor 23 and the zero screw 22 are used to locate the zero angle of the slewing plate 20.

[0025] The moving pair is primarily used to enable the distance sensor 6 to move linearly along the height direction and, in conjunction with the rotational motion of the rotating plate 20, to detect, scan, or measure the distances of the outer contours of people and objects at different heights. It consists of a long plate 24, a linear module slide 25, a coupling B26, a servo motor B27, three photoelectric switches 28, a photoelectric switch fixing plate 29, a positioning plate 30, and a distance sensor mounting plate 31. The lower end of the long plate 24 is bolted to the top plate, while its inner side is bolted to the slide's aluminum alloy base. The linear module slide 25 is a standard mechanical component capable of providing linear motion. It converts the motor's rotation into the linear motion of the moving slide. It consists of a base, a moving slide, a lead screw, a motor connecting plate, and two end screw support sleeves. The servo motor B27 is bolted to the motor connecting plate of the linear module slide 25, and its rotating shaft is connected to the rotating shaft of the linear module slide 25's ball screw via a coupling B. Three identical brackets are screwed onto the side of the slide base. Each bracket is secured with a photoelectric switch 28. One photoelectric switch 28 is used to control the upper limit of the slider's movement, one is used to control the lower limit of the slider's movement, and one is used to control the zero position. A positioning plate 30 is also screwed onto the side of the slider of the linear module slide 25. This positioning plate 30 moves within the U-shaped groove of the photoelectric switch 28 to generate a limit or zero position signal. A distance sensor mounting plate 31 is screwed onto the top of the slider of the linear module slide 25 to secure the distance sensor 6.

[0026] The distance sensor 6 is fixed to the slider of the linear module slide 25 via a photoelectric switch fixing plate 29. It determines the detection height as the slider moves linearly. The distance sensor 6, which can be a laser distance sensor 6 or an ultrasonic distance sensor 6, converts the distance between the sensor and the detection reflection point into a DC voltage proportional to the distance. After analog-to-digital conversion, the data is provided to the controller of the body shape measurement device for post-processing to generate point cloud data.

[0027] The base plate 1 is a circular thick metal plate, which serves as the counterweight base of the measuring device. Three pillars 2 arranged in an equilateral triangle are fastened to it at the edge by threads, and the flanged seat bearing 19 below the rotating shaft A17 is also fixed to the upper surface of the base plate 1 by bolts.

[0028] The pillars 2 are cylindrical metal rods, three in total, used as supports for the top plate 3 and a series of devices mounted on the top plate 3. The lower end of each pillar 2 is fastened to the bottom plate 1 by a thread, and the upper end is also fastened to the top plate 3 by a threaded nut.

[0029] The top plate 3 is a circular metal plate. The servo motor 7 of the rotating pair 4 is bolted to its upper surface, and the long strip plate 24 of the fixed moving pair 5 is also bolted to its upper surface. The fixed plate 11 of the rotating shaft B9 is also bolted to its lower surface, and the vertical bearing 10 of the rotating shaft B9 is bolted to the side surface of the fixed plate 11 of the rotating shaft B.

[0030] The flanged bearing 19 above the rotating shaft A17 is also bolted to the lower surface of the top plate 3. The top plate 3 has a circular hole in its center through which the rotating shaft A17 extends upward, supporting the slewing plate 20. A threaded hole in the top plate 3 is used to secure the angular zero-position magnetic contact switch sensor 23 of the slewing plate 20. The slewing plate 20 is a disc-shaped structure, and to increase its rigidity, transverse ribs are welded to its lower surface in both the horizontal and vertical directions.

[0031] The cross-section of the fixing plate 11 is close to an L-shape, the upper surface of which is fixed to the lower surface of the top plate 3 by bolts, and the side surface of which is fixed to two vertical seated bearings 10 supporting the rotating shaft B9 by bolts.

[0032] The present invention obtains the distance between feature points on the contour, such as height, shoulder width, leg length, etc., through simple calculation processing. If the center point of the upper surface of the rotating plate 20 is defined as the coordinate origin, the distance between the center point of the sensor emission window and the central axis of the rotating plate 20 is D. If at a certain position during distance measurement, the height direction distance between the sensor and the rotating plate 20 is H, the rotation angle of the rotating plate 20 relative to the zero position is θ, and the distance between the center point of the sensor emission window and the projection point of the human body or object is d, then the three-dimensional rectangular coordinates x, y, z of the projection point are D-dcosθ, D-dsinθ, H. If the three-dimensional rectangular coordinates of the two points after measurement are x1, y1, z1 and x2, y2, z2 respectively, then the distance between the two points is: ((x1-x2) 2 +(y1-y2) 2 +(z1-z2) 2 ) 0.5 .

[0033] The utility model can also calculate the length of contour lines such as chest circumference, waist circumference, hip circumference, etc. by integral operation. For example, a human cross section, the cross section height coordinate is z0, and the three-dimensional rectangular coordinate set of each contour point generated along the rotation direction is {x 0， y0, z0, x1, y1, z0, x2, y2, z0,···,x n-1 ,y n-1 ,z0,x n ,y n , z0}, then the total length of the contour is ∑((x i -x i-1 ) 2 +(y i -y i-1 )2 ) 0.5 The value of ,i ranges from 1 to n. The spacing between these feature points and the length of the cross-section contour line are very valuable reference data for clothing design and athlete selection.

[0034] The utility model is mainly used in the field of body measurement for clothing design and athlete selection, and can also be used in the field of imitation of handicrafts, antiques or cultural relics.

Claims

1. A non-contact body shape measuring device, characterized in that: It includes a base plate (1), a support (2), a top plate (3), a rotating pair (4), a moving pair (5), and a distance sensor (6); The bottom plate (1) is connected to the top plate (3) via a support (2), and a rotating pair (4) and a moving pair (5) are installed on the top of the top plate (3); The distance measuring sensor (6) is mounted on a vertically arranged moving pair (5) and moves up and down.

2. The non-contact body shape measuring device according to claim 1, characterized in that: The rotating pair (4) includes a servo motor (7), which is mounted on the surface of the top plate (3). The servo motor (7) is connected to the upper end of the rotating shaft B (9) through a coupling A (8), and the lower end of the rotating shaft B (9) is connected to the synchronous wheel B (12). Two vertical seat bearings (10) are provided on the rotating shaft B (9) between the coupling A (8) and the synchronous wheel B (12); the vertical seat bearings (10) of the rotating shaft B (9) are fixed to the side surface of the fixed plate (11) of the rotating shaft B by bolts; the synchronous wheel B (12) is horizontally connected to the synchronous wheel A (15) through a synchronous belt (14), and the synchronous wheel A (15) is connected to the rotating shaft A ( 17), a positioning fastening ring C (18) is installed on the top of the rotating shaft A (17), and the upper part of the positioning fastening ring C (18) is close to the rotating plate (20). The rotating shaft A (17) is supported by two flange-mounted bearings (19), and the flange-mounted bearings (19) are respectively fixed on the lower surface of the top plate (3) and the upper surface of the bottom plate (1). The top of the rotating shaft A (17) is connected to the rotating plate (20), and is driven by a key (21) set on the top of the rotating shaft A (17). A zero screw (22) is set below the edge of the rotating plate (20) and is used in conjunction with a magnetic contact switch sensor (23). The magnetic contact switch sensor (23) is installed on the upper surface of the top plate (3).

3. The non-contact body shape measuring device according to claim 2, characterized in that: The moving pair (5) comprises a long strip plate (24) mounted on the upper surface of the top plate (3), a linear module slide (25) arranged along the surface of the long strip plate (24), a coupling (26) and a servo motor B (27) arranged on the top of the long strip plate (24), three photoelectric switches (28) are mounted on the long strip plate (24), one of which is mounted on the upper side and two on the lower side, and a distance sensor mounting plate (31) and a positioning piece (30) are arranged on the linear module slide (25).

4. The non-contact body shape measuring device according to claim 3, characterized in that: The rotating pair (4) includes a rotary plate (20), and the moving pair (5) includes a linear module slide (25). The central rotation axis of the rotating plate (20) of the rotating pair (4) and the moving axis of the moving slider of the linear module slide (25) of the moving pair (5) are parallel to each other, and the movements of the two are independent of each other and do not affect each other. The mounting plate (31) of the distance measuring sensor (6) is fixed on the moving slider of the linear module slide (25).

5. The non-contact body shape measuring device according to claim 4, characterized in that: The linear module slide (25) converts the rotation of the motor into the linear motion of the moving slider. The positioning piece (30) is a thin aluminum alloy piece with an N-shaped cross-section and is fixed to the side of the moving slider of the linear module slide (25). The distance sensor mounting plate (31) has an L-shaped cross-section and is fixed on the upper surface of the moving slider of the linear module slide (25).

6. The non-contact body shape measuring device according to claim 3, characterized in that: The photoelectric switch (28) is mounted on the long plate (24) via a photoelectric switch fixing plate (29); the base plate (1) is a circular thick metal plate, and three pillars (2) arranged in an equilateral triangle are fastened to the base plate at the edge thereof via threads.

7. The non-contact body shape measuring device according to claim 2, characterized in that: The flanged seat bearing (19) above the rotating pair (4) is also fastened to the lower surface of the top plate (3) by bolts. There is a circular hole in the center of the top plate (3), and the rotating shaft A (17) extends upward through the hole to support and connect the rotating plate (20). There is a threaded hole on the top plate (3) for fixing the angle zero position magnetic contact switch sensor (23) of the rotating plate (20). The rotating plate (20) is a disc-shaped structure. In order to improve its rigidity, transverse ribs are welded on its lower surface in the horizontal and vertical directions.

8. The non-contact body shape measuring device according to claim 2, characterized in that: The cross-sectional shape of the fixing plate (11) is close to L-shaped, the upper surface is fixed to the lower surface of the top plate (3) by bolts, and the side surface is connected to the two vertical seat bearings (10) of the rotating shaft B (9) by bolts.

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