CN210019347U - Forearm length measurement system - Google Patents
Forearm length measurement system Download PDFInfo
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- CN210019347U CN210019347U CN201920613075.5U CN201920613075U CN210019347U CN 210019347 U CN210019347 U CN 210019347U CN 201920613075 U CN201920613075 U CN 201920613075U CN 210019347 U CN210019347 U CN 210019347U
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- 210000000245 forearm Anatomy 0.000 title claims abstract description 35
- 238000005259 measurement Methods 0.000 title claims abstract description 24
- 210000000707 wrist Anatomy 0.000 claims abstract description 112
- 238000003384 imaging method Methods 0.000 claims abstract description 45
- 210000002310 elbow joint Anatomy 0.000 claims abstract description 37
- 238000004364 calculation method Methods 0.000 claims abstract description 13
- 238000010191 image analysis Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 3
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- 238000004458 analytical method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 206010040925 Skin striae Diseases 0.000 description 4
- 210000002221 olecranon process Anatomy 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000000623 ulna Anatomy 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000013135 deep learning Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000000877 morphologic effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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- 210000003462 vein Anatomy 0.000 description 1
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model provides a forearm length measurement system, this system includes: the device comprises a base, a support, a pressure sensing device arranged on the base, an imaging device arranged on the support, a computing device, a correction scale and a wrist base, wherein the computing device, the correction scale and the wrist base are respectively connected with the imaging device and the pressure sensing device; the wrist of the testee is placed on the wrist base, and the calibration scale and the wrist of the testee form a preset corresponding relation, so that the imaging device can shoot and obtain shot images of the wrist striations and the calibration scale of the testee; the imaging device sends the shot image to the computing device; the pressure sensing device sends the position point of the elbow joint obtained by measurement to the computing device; the calculating device receives the shot image sent by the imaging device and the position point of the elbow joint sent by the pressure sensing device, and the forearm length is obtained through calculation. The system achieves the purposes of convenience, low cost and small size in forearm length measurement.
Description
Technical Field
The utility model relates to a measure technical field, especially relate to a forearm length measurement system.
Background
The forearm length is one of important parameters for human body measurement, the standard measurement method is the straight line distance from a radius point to a radius apophysis point, and the straight line distance is usually measured by a round bar square gauge by a professional.
With the development of the technology, a non-contact human body measurement technology without manual participation appears, which is based on modern optics and integrates scientific technologies such as optoelectronics, computer imaging, information processing, computer vision and the like, and by completing scanning of the whole body of a measured person and then taking the image information of the measured person as reference information, relevant information needing to be measured, such as forearm length information, is extracted or estimated from the reference information.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a forearm length measurement system.
In order to achieve the above object, the utility model provides a following technical scheme:
a forearm length measurement system, the system comprising:
the device comprises a base, a support, a pressure sensing device arranged on the base, an imaging device arranged on the support, a computing device, a correcting scale and a wrist base, wherein the computing device, the correcting scale and the wrist base are respectively connected with the imaging equipment and the pressure sensing device;
the wrist of the testee is placed on the wrist base, and the calibration scale and the wrist of the testee are in a preset corresponding relation, so that the imaging device can shoot and obtain shot images of the transverse striations and the calibration scale of the wrist of the testee; the imaging device sends the shot image to the computing device;
the pressure sensing device sends the position point of the elbow joint obtained by measurement to the computing device;
and the computing device receives the shot image sent by the imaging device and the position point of the elbow joint sent by the pressure sensing device, and calculates to obtain the length of the forearm.
Optionally, the wrist base comprises a height adjustment device, wherein an angle between the arm of the subject and the measurement plane is greater than 15 degrees by the height adjustment device.
Optionally, the system further comprises:
a fixing device, wherein the fixing position of the imaging device on the bracket is adjusted by the fixing device.
Optionally, the system further comprises:
and the reference position point component is positioned in the shooting range of the imaging device and has a preset position relation with the wrist of the measured person, so that the reference position point component can be a reference point of the transverse striation of the wrist.
Optionally, the system further comprises:
and the illuminating device is arranged on the bracket and is used for supplementing shooting light rays for the imaging device.
Optionally, the computing device comprises:
an image analysis unit, a data calculation device and a storage unit.
Optionally, the pressure sensing device comprises an array type pressure sensing device or a continuous type pressure sensing device.
Compared with the prior art, the utility model provides a forearm length measuring system, this system includes base, support, set up pressure sensing device on the said base, set up the image device on the said support, respectively with the said image device and the said pressure sensing device connected calculating device, correction scale and wrist base; the position point of the elbow joint is obtained based on the pressure sensing device, the shot image of the wrist transverse striation and the correction scale of the measured person is obtained based on the imaging device, and then the image is identified and the forearm length is obtained through calculation. The system has a simple structure, does not need professional staff to measure, is convenient to use, and has low cost, thereby meeting the requirement of forearm measurement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a forearm length measuring system according to an embodiment of the present invention;
fig. 2 is a schematic view of wrist cross grain image processing according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In an embodiment of the present invention, a forearm length measurement system is provided, see fig. 1, the system comprising:
the device comprises a base 1, a support 2, a pressure sensing device 3 arranged on the base 1, an imaging device 4 arranged on the support 2, a computing device 5 respectively connected with the imaging device 4 and the pressure sensing device 3, a correction scale 6 and a wrist base 7;
the elbow joint of the testee is contacted with the pressure sensing device 3, the wrist of the testee is placed on the wrist base 7, and the calibration scale 6 and the wrist of the testee form a preset corresponding relation, so that the imaging device 4 can shoot and obtain shot images of the wrist striations and the calibration scale of the testee; the imaging device 4 transmits the captured image to the computing device 5;
the pressure sensing device 3 sends the position points of the elbow joint obtained by measurement to the computing device 5;
the calculation means 5 receives the captured image transmitted from the imaging means 4 and the position point of the elbow joint transmitted from the pressure sensing means 3, and calculates the forearm length.
Wherein, the reference dimension of wrist band in the image that the sign is used for calculating to shoot of correcting, need imaging device can shoot a picture to correction scale, wrist band, reference position point, and the wrist and other system structure of measurand can not shelter from the correction scale to avoid the influence to shoot it.
The most critical point in measuring the forearm length is to acquire the elbow joint position and the wrist striation position of the measured person and then calculate the forearm length by the position information. The position point of the elbow joint is measured by a pressure sensing device. Specifically, due to the influence of the arm structure and the clothes of the measured person, when the arm is horizontally placed in the measuring process, the ulna backbone part firstly contacts the measuring plane, so that the arm and the measuring plane need to form a certain angle, the ulna backbone part is lifted, and the good contact between the elbow ulna olecranon part and the pressure measuring plane is ensured. In order to realize the angle between the arm and the measuring plane, the wrist base 7 is utilized in the measuring system, namely, the wrist base 7 is placed below the wrist of the measured person, the wrist base 7 comprises a height adjusting device, and the height of the wrist base can be adjusted through the height adjusting device, so that the angle between the arm of the measured person and the measuring plane meets the preset requirement, and in order to enable the transverse striations of the wrist of the measured person to be fully shot by an imaging device, the angle is generally selected to be an angle larger than 15 degrees.
Then obtain measurand person's elbow pressure information through pressure perception device 3 measurement, can utilize pressure perception device 3 to carry out the analysis to elbow pressure information, mainly including getting rid of the interference of information such as clothing, the position of the biggest point of extraction pressure is as the mark point of elbow position promptly elbow joint's position point, when pressure perception device does not possess the analysis function, pressure perception device can send elbow pressure information to computing device, carry out the analysis to elbow pressure information through computing device and obtain elbow joint's position point, when pressure perception device sends elbow pressure information or elbow joint's position point's relevant information to computing device, just need pressure perception device to have the communication interface that carries out the communication with computing device, can also be wired connection mode for wireless connection mode.
The wrist striation position is obtained through measurement and calculation of the imaging device 4 and the calculating device 5, and as a human body generally has 2-3 wrist striations and different forms, when accurate position information of the wrist striations is obtained, a shot image obtained through measurement of the imaging device 4 needs to be processed, wherein the shot image comprises a wrist image of a measured person and an image of a correction scale 6, a preset reference point needs to be set, the preset reference point can be embodied through a reference position point component, the reference position point component is located in a shooting range of the imaging device and has a preset position relation with the wrist of the measured person, and therefore the reference position point component can be a reference point of the wrist striations. The reference point may also be a point of a known location of the image, such as the center point of the image.
Referring to fig. 2, a schematic diagram of processing a wrist band image according to an embodiment is provided, in which a picture is first coordinate-positioned, and the picture is taken as a Y axis along an arm direction and taken as an X axis perpendicular to the arm direction. Then, processing the image after coordinate positioning to obtain image information of a first wrist transverse stripe close to the wrist defense line, fitting a straight line K vertical to the arm direction (Y axis) through coordinates of each point of the first wrist transverse stripe, taking the straight line K as a marking line of the first wrist transverse stripe, simultaneously obtaining a line segment of the straight line K crossing the wrist through image processing, and taking a middle point of the line segment as a marking point of the wrist, namely a position point or position information of the wrist transverse stripe. In fig. 2, reference numeral 10 denotes a first wrist cross-grain, 20 denotes a straight line K, and 30 denotes a wrist mark point.
Specifically, the computing unit extracts morphological features in the wrist striation image, preprocesses the image, including removing image noise and image format conversion, and combines large data deep learning tools such as a CaffeNet model and a TensorFlow model through image processing algorithms such as threshold segmentation, edge extraction and morphology to realize wrist striation recognition, feature point recognition and ruler correction recognition. And then, obtaining various parameters such as the scale information of the wrist transverse striation position point, the reference position point and the correction scale. And calculating a correction scale through a calculation method of the wrist transverse striation position and the characteristic points. And then, obtaining various parameters such as the scale information of the wrist transverse striation position point, the reference position point and the correction scale. Calculating the distance or the number of pixels of the unit length of the correction scale on the image and the distance or the number of pixels of the wrist cross grain to the reference position point on the image through the calculation of the wrist cross grain position and the feature point calculation; and obtaining the specific position of the transverse striation according to the proportional relation of the two. And finally, acquiring the accurate position of the wrist through the position information of the transverse striation of the wrist for calculating the length of the forearm.
The computing device thus comprises: the device comprises an image analysis unit, a data calculation device and a storage unit, wherein the image analysis unit is used for recognizing and analyzing images, the data calculation device is used for calculating data, such as forearm length, and the storage unit is used for storing wrist striation images or relevant data.
In another embodiment of the present application, the system further comprises:
a fixing device, wherein the fixing position of the imaging device on the bracket is adjusted by the fixing device. I.e. the imaging device can be adjusted to the appropriate shooting position by means of the fixing device.
In another embodiment of the present application, the system further comprises:
and the illuminating device is arranged on the bracket and is used for supplementing shooting light rays for the imaging device.
The lighting device can be a shadowless lamp or an incandescent lamp or a low-pressure mercury lamp or an LED lamp, and the lighting optical fiber emitted by the lighting device is polychromatic light or monochromatic light.
The pressure sensing device is placed below the elbow joint of a measured person and used for detecting the pressure of the elbow joint and calculating the position point of the elbow joint, and the pressure sensing device comprises an array type pressure sensing device or a continuous type pressure sensing device. That is, the pressure sensing device may be a pressure sensor array, or other pressure sensing device capable of obtaining position information and associated signal conditioning, collecting and analyzing module.
It should be noted that the wrist base is used for supporting the wrist, and the arm and the measuring table are at a certain angle, so that the olecranon of the ulna is ensured to be in good contact with the measuring plane, and the transverse striation of the wrist is fully exposed.
The utility model provides a forearm measuring system, which comprises a base, a bracket, a pressure sensing device arranged on the base, an imaging device arranged on the bracket, a calculating device, a correcting scale and a wrist base, wherein the calculating device, the correcting scale and the wrist base are respectively connected with the imaging device and the pressure sensing device; the position point of the elbow joint is obtained based on the pressure sensing device, the shot image of the wrist transverse striation and the correction scale of the measured person is obtained based on the imaging device, and then the image is identified and the forearm length is obtained through calculation. The system has a simple structure, does not need professional staff to measure, is convenient to use, and has low cost, thereby meeting the requirement of forearm measurement.
In another embodiment of the present application, there is also provided a forearm length measurement method applied to the forearm length measurement system described in any one of the above, the method including:
s101, acquiring elbow joint pressure positions of a measured person, and determining position information of the elbow joint of the measured person according to the elbow joint pressure positions;
s102, acquiring shot images of wrist striations and a correction scale of the measured person, and analyzing the shot images to obtain the distance between the wrist striations and a preset reference point;
s103, calculating to obtain position information of the wrist striation based on the distance between the wrist striation and a preset reference point;
and S104, calculating and obtaining the forearm length of the testee based on the position information of the elbow joint of the testee and the position information of the transverse crease of the wrist.
On the basis of the above embodiment, the acquiring of the shot images of the wrist striation and the calibration scale of the testee and the obtaining of the distance between the wrist striation and the preset reference point through the analysis of the shot images includes:
acquiring shot images of transverse striations and a correction scale of the wrist of the measured person;
carrying out coordinate positioning on the shot image to obtain a coordinate image; wherein, the direction along the arm of the tested person is used as Y axis, and the direction vertical to the arm is used as X axis;
acquiring coordinates of each point of a first wrist transverse striation at a preset position based on the coordinate image, and fitting the coordinates of each point of the first wrist transverse striation to obtain a fitting straight line;
acquiring a line segment of the fitted straight line crossing the wrist, and determining the middle point of the line segment as a mark point;
and calculating to obtain the distance between the mark point and a preset reference point.
On the basis of the above embodiment, the calculating and obtaining the position information of the wrist striation based on the distance between the wrist striation and the preset reference point includes:
calculating a first distance per unit length of the correction scale on the captured image;
and calculating to obtain the position information of the wrist striation according to the proportional relation between the first distance and the distance between the wrist striation and a preset reference point.
For example, the elbow ulna olecranon is in good contact with the tabletop due to the presence of the wrist mount that allows the arm to be angled with respect to the measurement platform. The pressure sensing device is used for detecting the pressure of the elbow joint of a human body, and then the position of the elbow joint is determined through the elbow joint pressure position, because the pressure is different due to different stress points and the presented pressure is different, and the specific position of the elbow joint can be determined through analyzing the pressure. Simultaneously through imaging device to wrist striae, reference position mark, formation of image of shooing such as correction scale, carry out the analysis to image information, obtain parameters such as striae, reference position point and correction scale, wherein, the reference dimension of wrist striae in the image that the correction sign is used for calculating to shoot needs imaging device can shoot correction scale, wrist striae, reference position point in a picture, and the person's wrist and other system architecture under test can not shelter from the correction scale to avoid the influence to shoot it. The distance from the wrist striation to the known reference point is obtained by calculating the distance or the number of pixels of the unit length of the correction scale on the image and the distance or the number of pixels of the wrist striation to the reference position point on the image according to the proportional relation of the two, so that the accurate position of the wrist striation is calculated and obtained; and acquiring the accurate position of the wrist through the position information of the transverse veins of the wrist. And finally, calculating and determining the length of the forearm according to the elbow joint and wrist positions, the angle between the arm and the test platform and other information.
As another example, the wrist band is aligned to a known fixed position to obtain the exact position of the wrist, and the forearm length is then calculated from the information about the elbow joint and wrist position, and the angle of the arm to the test platform.
For another example, the pressure sensing device is used to detect the pressure of the elbow joint of the human body, and the pressure position of the elbow joint sensed by the pressure sensing device is used to determine the position of the elbow joint. Meanwhile, the imaging device is used for photographing and imaging the wrist striations, the reference position marks, the correction scales and the like, and an operator manually determines the positions of the wrist striations by obtaining images. And then, processing and calculating the position information determined manually to obtain the distance from the wrist striation to a known reference point, thereby calculating and obtaining the accurate position of the wrist striation. And finally, calculating and determining the length of the forearm according to the positions of the elbow joint and the wrist, the angle between the arm and the test platform and other information.
In the forearm length measuring system, the arm and the measuring platform form a certain angle, so that the olecranon of the elbow joint is in good contact with the table top. Then, the pressure of the elbow joint of the human body is detected by using the pressure sensing device, and the position point of the elbow joint is determined by the pressure sensing position of the pressure sensing device. Meanwhile, imaging equipment is used for photographing and imaging the wrist cross striations, the reference position marks, the correction scales and the like, image information is analyzed through the computing unit, parameters such as the wrist cross striations, the reference position points and the correction scales are obtained, and therefore accurate position points of the wrist are obtained through computing. And finally, calculating and determining the forearm length according to the position points of the elbow joint and the wrist and the angle between the arm and the test platform. The system can realize intelligent identification and automatic calculation, and has high accuracy. Can be used for measuring the length of the forearm of a human body, positioning the same body size in traditional Chinese medicine and the like. And the measuring method is simple and easy to apply.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A forearm length measurement system, the system comprising:
the device comprises a base, a support, a pressure sensing device arranged on the base, an imaging device arranged on the support, a computing device, a correcting scale and a wrist base, wherein the computing device, the correcting scale and the wrist base are respectively connected with the imaging device and the pressure sensing device;
the wrist of the testee is placed on the wrist base, and the calibration scale and the wrist of the testee are in a preset corresponding relation, so that the imaging device can shoot and obtain shot images of the transverse striations and the calibration scale of the wrist of the testee; the imaging device sends the shot image to the computing device;
the pressure sensing device sends the position point of the elbow joint obtained by measurement to the computing device;
and the computing device receives the shot image sent by the imaging device and the position point of the elbow joint sent by the pressure sensing device, and calculates to obtain the length of the forearm.
2. The system of claim 1, wherein the wrist mount comprises a height adjustment device, wherein an angle between the subject's arm and the measurement plane is greater than 15 degrees by the height adjustment device.
3. The system of claim 1, further comprising:
a fixing device, wherein the fixing position of the imaging device on the bracket is adjusted by the fixing device.
4. The system of claim 1, further comprising:
and the reference position point component is positioned in the shooting range of the imaging device and has a preset position relation with the wrist of the measured person, so that the reference position point component can be a reference point of the transverse striation of the wrist.
5. The system of claim 1, further comprising:
and the illuminating device is arranged on the bracket and is used for supplementing shooting light rays for the imaging device.
6. The system of claim 1, wherein the computing device comprises:
an image analysis unit, a data calculation device and a storage unit.
7. The system of claim 1, wherein the pressure sensing device comprises an array pressure sensing device or a continuous pressure sensing device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920613075.5U CN210019347U (en) | 2019-04-29 | 2019-04-29 | Forearm length measurement system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920613075.5U CN210019347U (en) | 2019-04-29 | 2019-04-29 | Forearm length measurement system |
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| CN210019347U true CN210019347U (en) | 2020-02-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109938738A (en) * | 2019-04-29 | 2019-06-28 | 博奥生物集团有限公司 | A kind of forearm measuring system and method |
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2019
- 2019-04-29 CN CN201920613075.5U patent/CN210019347U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109938738A (en) * | 2019-04-29 | 2019-06-28 | 博奥生物集团有限公司 | A kind of forearm measuring system and method |
| CN109938738B (en) * | 2019-04-29 | 2024-05-17 | 博奥生物集团有限公司 | Forearm length measurement system and method |
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