CN108613728B - Human body data measuring device and method - Google Patents
Human body data measuring device and method Download PDFInfo
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- CN108613728B CN108613728B CN201810763847.3A CN201810763847A CN108613728B CN 108613728 B CN108613728 B CN 108613728B CN 201810763847 A CN201810763847 A CN 201810763847A CN 108613728 B CN108613728 B CN 108613728B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 78
- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 238000005303 weighing Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 15
- 210000004709 eyebrow Anatomy 0.000 claims description 28
- 238000005259 measurement Methods 0.000 claims description 25
- 230000001360 synchronised effect Effects 0.000 claims description 20
- 210000003128 head Anatomy 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000001815 facial effect Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 238000013528 artificial neural network Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/44—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons
- G01G19/50—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons having additional measuring devices, e.g. for height
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1072—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring distances on the body, e.g. measuring length, height or thickness
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- Health & Medical Sciences (AREA)
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- Oral & Maxillofacial Surgery (AREA)
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- Animal Behavior & Ethology (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a human body data measuring device and a method, wherein the device comprises a base and a bracket component; at least one weighing sensor for acquiring weight information is arranged below the cover plate of the base; the bracket component comprises a main bracket, a guide rail, a sliding block and a camera module; the guide rail is fixed on the main support, and a driving mechanism and a transmission mechanism are arranged on the main support; the driving mechanism is used for driving the transmission mechanism to run under the control of the camera module; the transmission mechanism is used for driving the sliding block to move on the guide rail when the transmission mechanism operates; the camera module is used for acquiring the position information of the camera module from the cover plate and the face image of the corresponding detected person in real time in the moving process of the camera module, and generating the height information of the detected person by utilizing a preset height model according to the position information and the face image. The invention does not need to arrange things at the head top position of the tested person, thereby effectively reducing the whole height of the measuring device and simultaneously reducing the whole weight.
Description
Technical Field
The present invention relates to the field of human body data measurement technology, and in particular, to a human body data measurement device and method.
Background
Along with the continuous development of social economy, the health concept gradually goes deep into the mind, and people pay more and more attention to the body data. The existing measuring devices for measuring height and weight are generally divided into two types, namely a mechanical measuring instrument and an ultrasonic measuring instrument. The mechanical measuring instrument is contacted with the head top of the measured person through a pressing block, a weight gauge is arranged under the foot, and then the distance between the head top of the measured person and the reference surface is obtained by reading on a vertical scale. The ultrasonic measuring instrument has little difference with the mechanical measuring instrument in weight measurement, and the height measurement is realized by using an ultrasonic ranging module arranged on the top of the measuring target head. Above-mentioned two kinds of measuring device all need set up the thing in the overhead position of survey personnel, make its support be "7" type structure, lead to measuring device structure height, heavy, use inconvenient.
Disclosure of Invention
The invention provides a human body data measuring device and a method, which mainly aim to solve the problems of high and heavy structure and inconvenient use of the existing measuring device.
In order to solve the technical problems, the invention adopts the following technical scheme:
a human body data measuring device comprises a base and a bracket component arranged on the base;
At least one weighing sensor for acquiring weight information is arranged below the cover plate of the base;
The bracket component comprises a main bracket, a guide rail, a sliding block and a camera module, wherein the guide rail, the sliding block and the camera module are arranged perpendicular to the base;
The guide rail is fixed on the main support, and a driving mechanism and a transmission mechanism are arranged on the main support;
The driving mechanism is connected with the camera module and used for driving the transmission mechanism to operate under the control of the camera module;
The transmission mechanism is connected with the sliding block and used for driving the sliding block to move on the guide rail when the transmission mechanism operates;
the camera module is connected with the weighing sensor and is used for acquiring the position information of the camera module from the cover plate and the face image of the corresponding person to be detected in real time in the moving process of the camera module, and generating the height information of the person to be detected by utilizing a preset height model according to the position information and the face image.
As an implementation manner, the camera module comprises a displacement sensor, a processor and a camera;
the displacement sensor and the camera are arranged on the same horizontal plane and used for collecting the position information from the center point of the camera to the base;
the processor is respectively connected with the weighing sensor, the displacement sensor and the camera, and is used for controlling the camera to acquire face images of a person to be detected in real time and acquiring height information by utilizing a preset height model according to the position information and the face images; and controls the operation of the drive mechanism.
As an implementation manner, the camera module further comprises a range finder;
the range finder is arranged beside the camera, connected with the processor, and used for generating a shooting control signal when an object appears in a preset distance and transmitting the shooting control signal to the processor.
As an implementation manner, the camera module further comprises a display module;
The display module is connected with the processor and used for displaying weight information, height information and face images under the control of the processor.
As one embodiment, the bracket assembly further comprises a bracket;
the camera module is arranged on the sliding block through the bracket.
As one embodiment, the driving mechanism includes a motor and a motor controller;
the motor is arranged in the main bracket;
And the motor controller is respectively connected with the motor and the camera module and is used for enabling the motor to run under the control of the camera module.
As an embodiment, the transmission mechanism includes a synchronous pulley, a synchronous belt, and a wheel disc;
the synchronous pulleys and the wheel discs are respectively arranged at two ends of the guide rail, and the synchronous pulleys are connected with the driving mechanism;
the synchronous belt is arranged on the synchronous belt wheel and the wheel disc and fixedly connected with the sliding block.
Correspondingly, the invention also provides a measuring method using the human body data measuring device, which comprises the following steps of;
Before measurement, a person to be measured stands on the base and faces the direction of the camera module;
During measurement, the weight information acquired by the weighing sensor is transmitted to the camera module, and the camera module controls the driving mechanism to drive the transmission mechanism to operate, so that a sliding block connected with the transmission mechanism moves upwards on the guide rail; in the moving process of the camera module, acquiring the position information of the camera module from the cover plate and the face image of the corresponding detected person in real time through the camera module; and generating the height information of the detected person by utilizing a preset height model according to the position information and the face image.
As an implementation manner, in the moving process of the camera module, the camera module acquires the position information of the camera module from the cover plate and the face image of the corresponding person to be detected in real time; generating the height information of the person to be detected by utilizing a preset height model according to the position information and the face image, wherein the method comprises the following steps;
When the camera module moves to be aligned with the nose end point of the person to be tested, acquiring nose end position information of the camera module from the cover plate and nose end face images of the corresponding person to be tested;
When the camera module moves to be aligned with the position of the eyebrow point of the person to be tested, obtaining information of the position of the camera module away from the cover plate and an eyebrow face image of the corresponding person to be tested;
and estimating the nose position information, the nose face image, the eyebrow position information and the eyebrow face image by using a preset height model to obtain the height information of the tested person.
As an embodiment, the method further comprises the following steps;
Judging whether an object appears in a preset distance according to an induction signal acquired by the range finder in the preset distance in the moving process of the camera module; when an object appears in a preset distance, judging whether a face image exists or not according to the image information acquired by the camera module; when the face image exists, the height of the camera module is adjusted to obtain the face image at the corresponding position.
Compared with the prior art, the technical scheme has the following advantages:
According to the human body data measuring device and method provided by the invention, the weighing sensor arranged below the base is used for measuring the weight information of the measured person, the driving mechanism is controlled by the image pickup module to drive the transmission mechanism to operate, so that the sliding block moves on the guide rail vertical to the base, the image pickup module arranged on the sliding block also moves to acquire the position information and the face image of the corresponding measured person, and finally the height information of the measured person is generated by utilizing the height model preset in the image pickup module. According to the invention, the head top position of the person to be measured is not required to be provided with things, so that the overall height of the measuring device is effectively reduced, and the overall weight is reduced; the weight can be measured and the face image can be obtained simultaneously when the height is measured.
Drawings
Fig. 1 is an exploded view of a human body data measurement device according to a first embodiment of the present invention;
Fig. 2 is a flow chart of a method for measuring human body data according to a second embodiment of the present invention;
Fig. 3 is a schematic view of feature points of a face image.
In the figure: 11. a cover plate; 12. a weighing sensor; 21. a main support; 22. a guide rail; 23. a slide block; 24. a camera module; 241. a range finder; 31. a motor; 41. a synchronous pulley; 42. a synchronous belt; 43. a wheel disc; 5. and a bracket.
Detailed Description
The foregoing and other features and advantages of the invention will be apparent from the following, more particular, description of the invention, as illustrated in the accompanying drawings, in which embodiments described are merely some, but not all embodiments of the invention.
Referring to fig. 1, a human body data measurement device according to an embodiment of the present invention includes a base and a bracket assembly disposed on the base; at least one weighing sensor 12 for acquiring weight information is arranged below the cover plate 11 of the base; the bracket assembly comprises a main bracket 21, a guide rail 22, a sliding block 23 and a camera module 24, wherein the guide rail 22 is arranged perpendicular to the base, and the camera module 24 is arranged on the sliding block 23; the guide rail 22 is fixed on the main bracket 21, and a driving mechanism and a transmission mechanism are arranged on the main bracket 21; the driving mechanism is connected with the camera module 24 and is used for driving the transmission mechanism to operate under the control of the camera module 24; the transmission mechanism is connected with the slide block 23 and is used for driving the slide block 23 to move on the guide rail 22 when the transmission mechanism operates; the camera module 24 is connected with the weighing sensor 12, and is configured to obtain, in real time, position information of the camera module 24 from the cover plate 11 and a face image of a corresponding person to be measured in a moving process of the camera module 24, and generate height information of the person to be measured by using a preset height model according to the position information and the face image.
It should be noted that, the cover plate 11 of the base is a place where the person to be measured stands, and the person to be measured needs to take off shoes and stand on the cover plate 11 to perform measurement. The height measurement is also a zero reference, that is, in the moving process of the camera module 24, the position information of the camera module 24 from the cover plate 11 is the position information of the camera module 24 from the upper surface of the cover plate 11, and can be understood as the height of the center point of the camera module 24 from the upper surface of the cover plate 11. And the load cell 12 provided below the cover plate 11 may be 1 or more. In the present embodiment, the number of the weighing sensors 12 is 4, and the weighing sensors are distributed in a quadrilateral manner. The load cell 12 may be of the type MT1241-100. The person to be measured is not easy to shake when standing on the cover plate 11, so that the weight information acquired by the weighing sensor 12 is more accurate.
The drive mechanism and the transmission mechanism may be mounted on the main support 21 such that the drive mechanism and the transmission mechanism are compactly engaged, avoiding additional engagement mechanisms. The driving mechanism may be a hydraulic driving mechanism, a pneumatic driving mechanism, and a motor 31 driving mechanism, which is not limited. The transmission mechanism is matched with the driving mechanisms, and the sliding block 23 is driven by the driving mechanisms to move on the guide rail 22. For example, the transmission mechanism is a conveyor belt. In other embodiments, the drive mechanism may be mounted in the base or external. When the drive mechanism is implemented as a hydraulic pump in combination with a hydraulic valve, then the hydraulic pump is typically external.
The guide rail 22 is arranged on the main bracket 21 and is perpendicular to the horizontal plane of the cover plate 11 of the base; the slide 23 is matched with the guide rail 22, so that the slide 23 moves on the guide rail 22 under the drive of the transmission mechanism. The camera module 24 mounted on the slider 23 naturally also moves with the movement of the slider 23. During movement, the camera module 24 may acquire location information and corresponding face images in real time. In this embodiment, the driving mechanism can directly raise the slider 23 from the lowest position to the highest position, and then realize a back and forth movement from the highest position to the lowest position. And calculating the height information of the detected person by acquiring the position information and the corresponding face image in real time. The height information of the person to be measured may be calculated by calculating only the position information acquired for a specific number of positions and the corresponding face image. In the latter case, the drive signals for the camera module 24 to drive the drive mechanism are also different. The latter needs to have an adjusted drive signal. Specifically, the camera module 24 receives the weight information of the weighing sensor 12 to generate an initial driving signal, and the driving mechanism drives the transmission mechanism to operate according to the initial driving signal, so that the camera module 24 moves upwards. When the face image is acquired in the camera module 24, the adjustment driving signal is generated by analyzing the face image, so that the camera of the camera module 24 is adjusted to a specific position under the control of the adjustment driving signal. Such as the camera center point of the camera module 24 being aligned with the chin point, lip contour point, nose end point, eye contour point, eyebrow contour point, or head apex of the person under test. And generating the height information of the tested person by using a preset height model according to the face images and the corresponding position information acquired at the specific positions. Thereby reducing the amount of computation of the image pickup module 24. Therefore, all detection and acquisition components are arranged in the chassis or the main support 21, the situation that things are required to be arranged at the head top position of a measured person like a measuring device in the prior art is avoided, the overall height of the measuring device is effectively reduced, and meanwhile, the overall weight is reduced.
The bracket assembly comprises a bracket 5, and in order to enable the camera module 24 to be installed at a preset position on the sliding block 23, the bracket 5 is fixedly connected to the sliding block 23, and then the camera module 24 is clamped on the bracket 5. The bracket 5 is provided with elastic claws, so that the camera module 24 is convenient to assemble and disassemble. And the position of the camera module 24 is easy to adjust, so that the camera of the camera module 24 is vertical to the horizontal plane of the cover plate 11, and the quality of the face image acquired by the camera module 24 is reduced.
According to the human body data measuring device provided by the invention, the weight information of the measured person is measured by using the weighing sensor 12 arranged below the base, the driving mechanism is controlled by the image pickup module 24 to drive the transmission mechanism to operate, so that the sliding block 23 moves on the guide rail 22 vertical to the base, the image pickup module 24 arranged on the sliding block 23 also moves to acquire the position information and the face image of the corresponding measured person, and finally the height information of the measured person is generated by using the preset height model in the image pickup module 24. According to the invention, the head top position of the person to be measured is not required to be provided with things, so that the overall height of the measuring device is effectively reduced, and the overall weight is reduced; the weight can be measured and the face image can be obtained simultaneously when the height is measured.
The following details the components:
The camera module 24 comprises a displacement sensor, a processor, a camera, a range finder 241 and a display module; the displacement sensor and the camera are arranged on the same horizontal plane and used for collecting the position information from the center point of the camera to the base; the processor is respectively connected with the weighing sensor 12, the displacement sensor and the camera, and is used for controlling the camera to acquire face images of a person to be detected in real time and acquiring height information by utilizing a preset height model according to the position information and the face images; and controls the operation of the drive mechanism. The range finder 241 is disposed beside the camera and connected to the processor, and is configured to generate a shooting control signal when an object appears within a preset distance, and transmit the shooting control signal to the processor. And the display module is connected with the processor and used for displaying weight information, height information and face images under the control of the processor.
The displacement sensor, the processor, the camera, the rangefinder 241 and the display module are all integrated in the housing of the camera module 24, and the whole camera module 24 can be fixed by being clamped with the housing. The processor is a center for data processing, and a preset height model is built in the processor. The displacement sensor can be of a type PME12-F-50-B, and can accurately measure the position information from the center point of the camera to the base. The range finder 241 is an existing instrument, when an object appears in a preset distance of the range finder 241, a shooting control signal is generated, the processor can control the camera to acquire an image according to the shooting control signal, and analyze whether a face image exists in the acquired image, and if the face image exists, the processor records corresponding position information. The display module displays the finally obtained weight information, height information and face image to a user for watching, so that the user can know the obtained weight information, height information and face image information by one-time measurement. And the face image can be used as a classification standard to store the data measured by each user. In other embodiments, the camera module 24 further includes a voice prompt module, connected to the processor, for voice prompting the user for standing and broadcasting the test data under the control of the processor.
In order to enable the drive mechanism to be provided directly on the main support 21, the drive mechanism includes a motor 31 and a motor controller; the motor 31 is installed in the main frame 21; the motor controller is connected to the motor 31 and the camera module 24, respectively, for operating the motor 31 under the control of the camera module 24. The motor 31 includes, but is not limited to, a servo motor 31, a stepping motor 31, a torque motor 31, and a switched reluctance motor 31; depending on the type of motor 31 employed, a corresponding motor controller is employed. The motor 31 runs under the control of the motor 31, and the accuracy and timeliness of the adjustment of the camera module 24 are ensured.
In the present embodiment, the transmission mechanism includes a timing pulley 41, a timing belt 42, and a sheave 43; the synchronous pulley 41 and the wheel disc 43 are respectively arranged at two ends of the guide rail 22, and the synchronous pulley 41 is connected with the driving mechanism; the timing belt 42 is provided on the timing pulley 41 and the sheave 43, and is fixedly connected to the slider 23. The transmission mechanism can be arranged beside the guide rail 22, and when the synchronous belt 42 rotates, the sliding block 23 fixedly connected with the synchronous belt 42 moves on the guide rail 22 under the drive of the synchronous belt 42. The rotation amount of the driving mechanism motor 31 is directly proportional to the movement amount of the slider 23. Accurate adjustment of the camera module 24 position is achieved.
In this embodiment, the complete working process of the measuring device may be as follows. When the measuring device is in a stopped state, the slider 23 is in the lowest limit position. When the person to be measured stands on the cover plate 11, the measuring device starts to work, and the weighing sensor 12 sends data of weight information to the processor of the camera module 24 in real time. When the weight information exceeds a certain value (such as 10 kg), the voice prompt module prompts the user to keep upright and face the camera module 24; the processor controls the driving mechanism to control the synchronous belt 42 to rotate, so that the sliding block 23 moves upwards. The range finder 241 senses whether an object exists in a certain range (such as within 30 cm) in front; if so, the camera module 24 detects in real time whether a face is present. If no face exists, the slider 23 continues to move up to the highest limit position, then the slider 23 is moved down, whether the face exists or not is detected, and if no face exists, the slider 23 continues to move down to the lowest limit position. If the existence of the human face is detected, the processor controls the vertical height of the camera module 24 through the matching of the driving mechanism and the transmission mechanism to adjust the sliding block 23, so that the center height position of the shot human face image is the nose end point and the eyebrow center point of the human face characteristic point, and the height model is called to obtain the height information. And displaying and storing the weight information, the height information and the face image of the tested person.
Based on the same inventive concept, the embodiment of the invention also provides a human body data measurement method, the implementation of the method can be realized by referring to the process of the system, the method is realized according to the measurement device, and the repetition is not redundant.
Fig. 2 is a schematic flow chart of a method for measuring human body data according to a second embodiment of the present invention, which includes the following steps;
S100, before measurement, a person to be measured stands on the base and faces the direction of the camera module;
S200, during measurement, weight information acquired by a weighing sensor is transmitted to a camera module, and a driving mechanism is controlled by the camera module to drive a transmission mechanism to operate, so that a sliding block connected with the transmission mechanism moves upwards on a guide rail; in the moving process of the camera module, acquiring the position information of the camera module from the cover plate and the face image of the corresponding detected person in real time through the camera module; and generating the height information of the detected person by using a preset height model according to the position information and the face image.
In the processor, a preset height model is required. The model may be obtained by learning sample data. The feature point labeling of a large number of face front image sample data is shown in fig. 3, and the feature points comprise: chin point a, lip contour point, nose point C, eye contour point, eyebrow contour point, vertex point F, etc.; and the center of the lip contour point is taken as a lip center point B, the center points of the two eye contour points are taken as two eye center points D, and the center points of the two eyebrow contour points are taken as an eyebrow point E. For each facial front image sample data, the distances from the lip center point B, the nose end point C, the two-eye center point D, the eyebrow center point E and the head vertex F to the chin point A are respectively calculated and respectively marked as D 1、d2、d3、d4、d5. A metric value for removing the scaling scale of the image is obtained by calculation according to d1′＝d1/d3、d2′＝d2/d3、d3′＝d3/d3＝1、d4′＝d4/d3、d5′＝d5/d3,, namely data { d 1′,d2′,1,d4′,d5' } is obtained from each face frontal image. From the large amount of sample data, a functional expression of d 5 ' relative to d 1′,d2′,1,d4 ', i.e., d 5′＝f(d1′,d2′,1,d4 '), is established; solving the d 5' functional expression may employ multiple nonlinear regression, multi-layer neural networks, and the like.
The height information of the measured person is obtained through calculation according to the position information and the face image by utilizing a height model preset in the camera module, and the object is not required to be arranged at the head top position of the measured person, so that the whole height of the measuring device is effectively reduced, and meanwhile, the whole weight is reduced; the weight can be measured and the face image can be obtained simultaneously when the height is measured.
Further, the step S200 includes the following steps;
s210, when the camera module moves to be aligned with the nose end point of the person to be tested, acquiring nose end position information of the camera module from the cover plate and a nose end face image of the corresponding person to be tested;
s220, when the camera module moves to be aligned with the position of the eyebrow point of the person to be tested, obtaining information of the position of the camera module away from the cover plate and an eyebrow face image of the corresponding person to be tested;
s230, estimating nose position information, nose face images, eyebrow position information and eyebrow face images by using a preset height model to obtain the height information of the detected person.
When the camera module moves to be aligned with the nose end point of the tested person, the nose end position information of the camera module, which is away from the cover plate, and the nose end face image of the corresponding tested person are acquired. At this time, the vertical height value (y 1) of the camera and the coordinate values of the following face feature points in the height direction in the nose face image are recorded, and are respectively marked as follows; chin point (p_y 1), lip center point (p_y 2), nose end point (p_y 3), both eyes center point (p_y 4), and eyebrow point (p_y 5); the nose position information is here (y 1).
The calculation results in metric values that remove the scale of the image, d1′＝(p_y2-p_y1)/(p_y4-p_y1)、d2′＝(p_y3-p_y1)/(p_y4-p_y1)、d3′＝(p_y4-p_y1)/(p_y4-p_y1)＝1 and d 4′＝(p_y5-p_y1)/(p_y4-p_y1). And from the functional expression of d 5 ' relative to d 1′,d2′,1,d4 ', d 5′＝f(d1′,d2′,1,d4 '), calculating d 5 ' which is the distance from the head vertex to the chin point independent of the image scale, and (d 5′-d2 '), i.e., the distance from the head vertex to the nose point independent of the image scale.
When the camera module moves to be aligned with the position of the eyebrow point of the person to be measured, obtaining the information of the position of the eyebrow point of the camera module, which is away from the cover plate, and the corresponding image of the face of the eyebrow point of the person to be measured; at this time, recording the vertical height value (y 2) of the camera; i.e. the eyebrow position information is (y 2). And shooting and storing the human body image. The characteristic points marked on the eyebrow face image are the same as those marked on the nose face image. Let s 1＝(p_y5-p_y3)/(p_y4-p_y1) and let y 3＝(d5′-d2′)×(y2-y1)/s1, y 3 is the physical distance from the nose end point to the vertex in the height direction, and (y 1+y3) is the height of the human body. Thereby obtaining accurate height information of the tested personnel.
Further, compared with the embodiment, the human body data measurement method provided by the third embodiment of the invention is different in that the method further comprises the following steps; judging whether an object appears in a preset distance according to an induction signal acquired by the range finder in the preset distance in the moving process of the camera module; when an object appears in a preset distance, judging whether a face image exists or not according to the image information acquired by the camera module; when the face image exists, the height of the camera module is adjusted to obtain the face image at the corresponding position. Therefore, the calculated amount of the face image is reduced, and the calculated result of the height information of the detected person is not influenced.
Although the present invention has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and technical matters disclosed above without departing from the spirit and scope of the present invention, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present invention are within the scope of the technical matters of the present invention.
Claims (10)
1. The human body data measuring device is characterized by comprising a base and a bracket component arranged on the base;
At least one weighing sensor for acquiring weight information is arranged below the cover plate of the base;
The bracket component comprises a main bracket, a guide rail, a sliding block and a camera module, wherein the guide rail, the sliding block and the camera module are arranged perpendicular to the base;
The guide rail is fixed on the main support, and a driving mechanism and a transmission mechanism are arranged on the main support;
The driving mechanism is connected with the camera module and used for driving the transmission mechanism to operate under the control of the camera module;
The transmission mechanism is connected with the sliding block and used for driving the sliding block to move on the guide rail when the transmission mechanism operates;
the camera module is connected with the weighing sensor and used for acquiring the position information of the camera module from the cover plate and the face image of the corresponding person to be detected in real time in the moving process of the camera module, and generating the height information of the person to be detected by utilizing a preset height model according to the position information and the face image;
Before measurement, a person to be measured stands on the base and faces the direction of the camera module;
During measurement, the weight information acquired by the weighing sensor is transmitted to the camera module, and the camera module controls the driving mechanism to drive the transmission mechanism to operate, so that a sliding block connected with the transmission mechanism moves upwards on the guide rail; in the moving process of the camera module, acquiring the position information of the camera module from the cover plate and the face image of the corresponding detected person in real time through the camera module; generating the height information of the person to be detected by utilizing a preset height model according to the position information and the face image;
When the camera module moves to be aligned with the nose end point of the person to be tested, acquiring nose end position information of the camera module from the cover plate and a nose end face image of the corresponding person to be tested; at this time, the vertical height value (y 1) of the camera and the coordinate values of the following face feature points in the height direction in the nose face image are recorded, and are respectively marked as follows; chin point (p_y 1), lip center point (p_y 2), nose end point (p_y 3), both eyes center point (p_y 4), and eyebrow point (p_y 5); the nose position information is (y 1);
The calculation results in metric values that remove the scale of the image, d1'＝(p_y2-p_y1)/(p_y4-p_y1)、d2'＝(p_y3-p_y1)/(p_y4-p_y1)、d3'＝(p_y4-p_y1)/(p_y4-p_y1)＝1 and d 4'＝(p_y5-p_y1)/(p_y4-p_y1). And from the functional expression of d 5 ' relative to d 1',d2',1,d4 ', d 5'＝f(d1',d2',1,d4 '), calculating d 5 ' which is the distance from the head vertex to the chin point independent of the image scale, and (d 5'-d2 '), i.e., the distance from the head vertex to the nose point independent of the image scale; when the camera module moves to be aligned with the position of the eyebrow point of the person to be measured, obtaining the information of the position of the eyebrow point of the camera module, which is away from the cover plate, and the corresponding image of the face of the eyebrow point of the person to be measured; at this time, the vertical height value of the camera is recorded (y 2), that is, the information of the position of the eyebrow is (y 2); shooting and storing human body images, wherein the marked characteristic points on the eyebrow facial images are the same as those of the nose facial images; let s 1＝(p_y5-p_y3)/(p_y4-p_y1) and let y 3＝(d5'-d2')×(y2-y1)/s1, then y 3 is the physical distance from the nose end point to the top of the head in the height direction, and (y 1+y3) is the height of the human body, so as to obtain accurate height information of the tested person.
2. The anthropometric data measurement device of claim 1, wherein the camera module comprises a displacement sensor, a processor, and a camera;
the displacement sensor and the camera are arranged on the same horizontal plane and used for collecting the position information from the center point of the camera to the base;
the processor is respectively connected with the weighing sensor, the displacement sensor and the camera, and is used for controlling the camera to acquire face images of a person to be detected in real time and acquiring height information by utilizing a preset height model according to the position information and the face images; and controls the operation of the drive mechanism.
3. The anthropometric data measurement device of claim 2, wherein the camera module further comprises a range finder;
the range finder is arranged beside the camera, connected with the processor, and used for generating a shooting control signal when an object appears in a preset distance and transmitting the shooting control signal to the processor.
4. The anthropometric data measurement device of claim 2, wherein the camera module further comprises a display module;
The display module is connected with the processor and used for displaying weight information, height information and face images under the control of the processor.
5. The body data measurement device of claim 1, wherein the bracket assembly further comprises a bracket;
the camera module is arranged on the sliding block through the bracket.
6. The body data measurement device of claim 1, wherein the drive mechanism comprises a motor and a motor controller;
the motor is arranged in the main bracket;
And the motor controller is respectively connected with the motor and the camera module and is used for enabling the motor to run under the control of the camera module.
7. The body data measurement device of claim 1, wherein the transmission mechanism comprises a synchronous pulley, a synchronous belt, and a wheel disc;
the synchronous pulleys and the wheel discs are respectively arranged at two ends of the guide rail, and the synchronous pulleys are connected with the driving mechanism;
the synchronous belt is arranged on the synchronous belt wheel and the wheel disc and fixedly connected with the sliding block.
8. A measurement method using the human body data measurement device according to any one of claims 1 to 7, characterized by comprising the steps of;
Before measurement, a person to be measured stands on the base and faces the direction of the camera module;
During measurement, the weight information acquired by the weighing sensor is transmitted to the camera module, and the camera module controls the driving mechanism to drive the transmission mechanism to operate, so that a sliding block connected with the transmission mechanism moves upwards on the guide rail; in the moving process of the camera module, acquiring the position information of the camera module from the cover plate and the face image of the corresponding detected person in real time through the camera module; and generating the height information of the detected person by utilizing a preset height model according to the position information and the face image.
9. The method of claim 8, wherein the camera module obtains the position information of the camera module from the cover plate and the face image of the corresponding person to be measured in real time during the movement of the camera module; generating the height information of the person to be detected by utilizing a preset height model according to the position information and the face image, wherein the method comprises the following steps;
When the camera module moves to be aligned with the nose end point of the person to be tested, acquiring nose end position information of the camera module from the cover plate and nose end face images of the corresponding person to be tested;
When the camera module moves to be aligned with the position of the eyebrow point of the person to be tested, obtaining information of the position of the camera module away from the cover plate and an eyebrow face image of the corresponding person to be tested;
and estimating the nose position information, the nose face image, the eyebrow position information and the eyebrow face image by using a preset height model to obtain the height information of the tested person.
10. The method of claim 8, further comprising the steps of;
Judging whether an object appears in a preset distance according to an induction signal acquired by the range finder in the preset distance in the moving process of the camera module; when an object appears in a preset distance, judging whether a face image exists or not according to the image information acquired by the camera module; when the face image exists, the height of the camera module is adjusted to obtain the face image at the corresponding position.
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| CN109838662B (en) * | 2019-01-30 | 2020-11-17 | 陈俊龙 | Three-dimensional face image recognition device |
| CN111012353A (en) * | 2019-12-06 | 2020-04-17 | 西南交通大学 | Height detection method based on face key point recognition |
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