CN112617818B - Sitting posture assessment method, device, computer equipment and storage medium - Google Patents
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Abstract
The embodiment of the invention discloses a sitting posture assessment method, a sitting posture assessment device, computer equipment and a storage medium. The method comprises the following steps: acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through pressure sensors in a cushion, wherein the pressure sensors are distributed in the cushion in an array mode; acquiring a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate; a plane perpendicular to the seat cushion and parallel to the leg direction of the user is made through the first three-dimensional coordinates to be used as a first plane; taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct. The embodiment of the invention realizes simple and noninductive evaluation of the spine bending degree and sitting posture of the user.
Description
Technical Field
The present invention relates to the field of sensors, and in particular, to a sitting posture assessment method, a sitting posture assessment device, a computer device, and a storage medium.
Background
With the change of the working modes of modern humans, sitting work for a long time is a form of work that is being adopted in more and more works, such as drivers driving various vehicles and white collars working in offices, and the like.
When sitting time is longer and longer, the more important is that the sitting position is correct, the human body balance can be influenced by the incorrect sitting position, and then diseases such as the deformation of the spine can be caused, the bending of the spine causes certain compression on the spine and the lumbar muscle, and the deformation of the spine and the strain of the lumbar muscle can be formed for a long time. Therefore, the real-time monitoring and evaluation of the sitting postures become the current demands of most people, so that the users know the sitting postures of the users.
How to monitor the spine bending degree in the sitting process of the user is a technical problem to be solved.
Disclosure of Invention
Based on this, it is necessary to provide a sitting posture evaluation method, a sitting posture evaluation device, a computer device and a storage medium for solving the above problems.
In a first aspect, an embodiment of the present invention provides a sitting posture assessment method, the method including:
acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through pressure sensors in a cushion, wherein the pressure sensors are distributed in the cushion in an array mode;
acquiring a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
a plane perpendicular to the seat cushion and parallel to the leg direction of the user is made through the first three-dimensional coordinates to be used as a first plane;
taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct.
In a second aspect, an embodiment of the present invention provides a sitting posture assessment apparatus, the apparatus comprising:
the data acquisition module is used for acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of the user in the sitting process of the user through pressure sensors in a cushion, and the pressure sensors are distributed in the cushion in an array mode;
the coordinate acquisition module is used for acquiring the three-dimensional coordinate of the point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
the plane acquisition module is used for taking a plane which is perpendicular to the seat cushion and parallel to the leg direction of the user through the first three-dimensional coordinate as a first plane;
the line pressing acquisition module is used for taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
and the user evaluation module is used for evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct.
In a third aspect, an embodiment of the present invention provides a computer device including a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of:
acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through pressure sensors in a cushion, wherein the pressure sensors are distributed in the cushion in an array mode;
acquiring a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
a plane perpendicular to the seat cushion and parallel to the leg direction of the user is made through the first three-dimensional coordinates to be used as a first plane;
taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through pressure sensors in a cushion, wherein the pressure sensors are distributed in the cushion in an array mode;
acquiring a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
a plane perpendicular to the seat cushion and parallel to the leg direction of the user is made through the first three-dimensional coordinates to be used as a first plane;
taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct.
According to the embodiment of the invention, the three-dimensional pressure distribution map data corresponding to the current sitting posture of the user in the sitting process of the user is obtained through the pressure sensor in the cushion, the spine bending degree of the user in the sitting process of the current sitting posture is estimated according to the three-dimensional pressure distribution map data, so that whether the current sitting posture of the user is correct or not is estimated, the user can monitor the spine bending degree and judge whether the sitting posture is correct or not only by sitting on the cushion without other operations, the problem that the user needs to actively judge whether the sitting posture is correct or not is solved, and the effects of simply and noninductively estimating the spine bending degree of the user and the sitting posture of the user are realized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a flow chart of a sitting posture assessment method in one embodiment;
FIG. 2 is a block diagram of a seat cushion in one embodiment;
FIG. 3 is a first pressure map made from three-dimensional pressure profile data in one embodiment;
FIG. 4 is a first pressure diagram of a user sitting upright in one embodiment;
FIG. 5 is a first pressure diagram of a user bending sitting position in one embodiment;
FIG. 6 is a flowchart showing a step S150 of a sitting posture assessment method according to another embodiment;
FIG. 7 is a first pressure line graph in another embodiment;
FIG. 8 is a flowchart showing a step S220 of a sitting posture assessment method according to another embodiment;
FIG. 9 is a flowchart showing a step S220 of a sitting posture assessment method according to another embodiment;
FIG. 10 is a block diagram of a sitting posture assessment apparatus in one embodiment;
FIG. 11 is a block diagram of a computer device in one embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In one embodiment, as shown in FIG. 1, a sitting posture assessment method is provided. The method can be applied to a terminal or a server, and the embodiment is applied to terminal illustration. The sitting posture assessment method specifically comprises the following steps:
s110, acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of the user in the sitting process of the user through a pressure sensor in the cushion.
In this embodiment, the terminal may be a computer device, or may be a mobile device of a user, such as a mobile phone, a tablet computer, or the like, and the terminal is an exemplary cushion, and the cushion may be a cushion that is detachable alone or may be a cushion that is integrated with the seat, where the pressure sensors are distributed in an array form in the cushion, and referring to fig. 2, the cushion 100 includes pressure sensors 200 distributed in an array form, the array precision of which is 8×8, and when the user sits on the cushion 100, the pressure sensors 200 on the cushion 100 sense pressure values and form a left hip pressure range 310 representing a left hip position, a left leg pressure range 320 representing a right hip position, and a right leg pressure range 420 representing a right hip position, and a right hip pressure range 410 representing a right leg position, and a coordinate system of the pressure sensor is further set in fig. 2, and according to the established rectangular coordinate system and the position of the user, the values of the right hip and the right hip are larger than the values of the left and the left leg in the X-axis and the Y-axis, the values of the right hip and the right leg and the left leg are larger than the values of the left and right leg, and the Z-axis and the three-dimensional pressure distribution map is generated, and the values of the pressure sensor are larger than the values are larger in the three-dimensional coordinate system.
The three-dimensional pressure distribution map data may be represented as two-dimensional pressure distribution map data in which the pressure values of the pressure sensors are represented in different colors and different shades of colors.
In one embodiment, since noise interference is mostly present in the acquired three-dimensional pressure profile data, and is embodied as gaussian noise, for example, a small pressure value occurs in a region where the pressure value is large, in order to eliminate gaussian noise generated or mixed in the three-dimensional pressure profile data during the digitizing process, small-window gaussian filtering processing may be further performed on the three-dimensional pressure profile data, that is, weighted average is performed on the three-dimensional pressure profile data, so as to eliminate gaussian noise interference, that is, before step S120 may be further performed: and carrying out Gaussian filtering processing on the three-dimensional pressure distribution map data. Specifically, acquiring original three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through a pressure sensor in a cushion; generating two-dimensional pressure distribution map data according to the original three-dimensional pressure distribution map data; performing Gaussian filtering processing on the two-dimensional pressure distribution map data; the processed two-dimensional pressure profile data is converted into three-dimensional pressure profile data.
Specifically, a gaussian template (mask, gaussian kernel) may be first obtained, then, each pixel in the two-dimensional pressure distribution map data, that is, the pixel value corresponding to each coordinate point, is scanned by using the gaussian template, the pixel value of the center point of the gaussian template is replaced by the weighted average gray value of the pixel in the neighborhood determined by the gaussian template, and finally, the above steps are repeatedly performed on each coordinate point of the two-dimensional pressure distribution map data, thereby completing the gaussian filtering process. The coordinates of a certain central point in the two-dimensional pressure distribution diagram are (x, y), the coordinates of 8 points closest to the coordinates of the central point in the three-dimensional pressure distribution diagram data, namely (x+1, y), (x-1, y), (x, y-1), (x+1, y-1), (x-1, y+1) and (x-1, y-1), are obtained, namely, the sum of 9 product results is taken as a gaussian filter value of the central coordinate point after the product of the pixel values of the 9 coordinate points and the gaussian template is correspondingly made, the coordinates corresponding to the 9 coordinate points are respectively substituted into a two-dimensional gaussian formula, so that the 9 coordinates are respectively converted into 9 coefficients, the sum of weights of the 9 coefficients is 1, the obtained coefficients of the 9 coordinate points are respectively, the gaussian filter value of the 9 coordinate points is taken as the gaussian filter value of the central coordinate point, the pixel values of the central coordinate point are replaced by the gaussian filter value, the color change is more gentle, and the color change of the two-dimensional pressure distribution diagram data of the three-dimensional user can be reflected more accurately, and the three-dimensional pressure distribution diagram data can be reflected more accurately. Preferably, since the curvature change of the spine has a small influence on the seat cushion, the array accuracy of the pressure sensor is 32×32 in order to catch these small changes.
And S120, acquiring the three-dimensional coordinate of the point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate.
And S130, using the first three-dimensional coordinates as a plane which is perpendicular to the cushion and parallel to the leg direction of the user, and taking the plane as a first plane.
And S140, taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing.
And S150, evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct.
In this embodiment, two larger pressure points are generated on the seat cushion due to the presence of the ischium of the user, only the pressure point with the largest pressure value can be taken for analysis, in the three-dimensional pressure distribution map data, the coordinate of the point with the largest pressure value is obtained as the first three-dimensional coordinate, the plane perpendicular to the seat cushion and parallel to the leg direction of the user is made as the first plane through the first three-dimensional coordinate, and referring to fig. 3, namely, the plane perpendicular to the X axis (not shown in the figure) and the Y axis and parallel to the Y axis is made as the first plane 20 through the first three-dimensional coordinate 40, when the leg direction and the Y axis direction of the user are not parallel, the intersecting line of the first plane 20 and the three-dimensional pressure distribution map data 10 is made as the first pressing line 30 after the first plane 20 is obtained through the first three-dimensional coordinate 40. Referring to fig. 4 and 5 together, fig. 4 is a first pressure diagram of an upright sitting posture of a user, fig. 5 is a first pressure diagram of a curved sitting posture of a user, the coordinate axis of the first pressure diagram is the same as the coordinate axis of three-dimensional pressure distribution diagram data, when the back of the user is curved and sitting, the ischium position moves close to the legs along with the curve of the spine, so that the coordinate of the maximum pressure point generated by the buttocks, namely, the first three-dimensional coordinate, moves a small distance along the X axis of the first pressure diagram toward the origin direction of the coordinate, so that the first pressure diagram is more curved and rises more slowly, and accordingly, the spine bending degree of the user, namely, the spine bending degree of the user can be estimated according to the pressure change on the first pressure diagram. In addition, the three-dimensional pressure data distribution diagram is subjected to Gaussian filtering, so that the obtained first pressing line is flatter and more accurate, and the evaluation result when the user sits on the spine bending degree in the current sitting posture is evaluated according to the pressure change on the first pressing line.
According to the embodiment of the invention, the three-dimensional pressure distribution map data corresponding to the current sitting posture of the user in the sitting process of the user is obtained through the pressure sensor in the cushion, the spine bending degree of the user in the sitting process of the current sitting posture is estimated according to the three-dimensional pressure distribution map data, so that whether the current sitting posture of the user is correct or not is estimated, the user can monitor the spine bending degree and judge whether the sitting posture is correct or not only by sitting on the cushion without other operations, the problem that the user needs to actively judge whether the sitting posture is correct or not is solved, and the effects of simply and noninductively estimating the spine bending degree of the user and the sitting posture of the user are realized.
As shown in fig. 6, in an embodiment, step S150 in the sitting posture assessment method may specifically include:
and S210, determining a second pressing line according to the first three-dimensional coordinates and the first pressing line, wherein the second pressing line is a line segment on the first pressing line in the direction from the legs to the buttocks of the user by taking the first three-dimensional coordinates as a starting point.
S220, evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the second pressure line.
In this embodiment, referring to fig. 7, in the first pressing line, the first three-dimensional coordinate may divide the first pressing line into two line segments l 1 And l 2 Wherein the line segment ending in the first three-dimensional coordinate is l 1 Taking the first three-dimensional coordinate as a starting point, taking a line segment from the leg of the user to the hip direction of the user as l 2 Selecting l 2 As the second line, i.e. a line segment in the first line drawing from the small to the large with the first three-dimensional coordinate as the starting point in the X-axis direction is the second line l 2 . In the Y-axis direction, the values of the Y-axis of the left hip and the right hip are larger than the values of the left leg and the right leg, so that the second pressing line is the pressing line of the buttocks of the user acting on the seat cushion, the pressure of the buttocks of the user on the seat cushion is larger due to the existence of ischium, and the pressing line of the buttocks acting on the seat cushion can better reflect the bending and vertical changes of the spine of the user, therefore, the spine bending degree of the user can be more accurately estimated according to the pressure change condition on the second pressing line, and the sitting posture of the user can be more accurately estimated.
According to the embodiment of the invention, the second press line which can reflect the bending and vertical changes of the user vertebra is selected from the first press lines to evaluate the bending degree of the user vertebra, so that the accuracy of sitting posture evaluation of the user is greatly improved.
As shown in fig. 8, in an embodiment, step S220 in the sitting posture assessment method may specifically include:
s310, calculating the maximum value of the pressure variation and the fluctuation amplitude of the pressure variation rate between the adjacent pressure sensors according to the second pressing line.
S320, evaluating the spine bending degree of the user sitting in the current sitting posture according to the maximum value of the pressure change quantity and the fluctuation amplitude of the pressure change rate.
In this embodiment, after the second wire is obtained, specifically, the maximum value of the pressure variation and the fluctuation width of the pressure variation rate between the adjacent pressure sensors may be calculated according to the second wire, where the maximum value of the pressure variation between the adjacent pressure sensors reflects the influence condition of the ischium of the user on the pressure variation on the second wire, and the fluctuation width of the pressure variation rate of the second wire is calculated, so that the spine bending degree of the user may be estimated according to the maximum value of the pressure variation and the fluctuation width of the pressure variation rate, where the larger the maximum value of the pressure variation and the smaller the fluctuation width of the pressure variation rate are, the more the second wire is bent, the slower the rise is, and the spine of the user is bent, so that the spine bending degree of the user may be estimated more accurately, and the sitting posture of the user may be estimated more accurately.
As shown in fig. 9, in an embodiment, step S220 in the sitting posture assessment method may specifically include:
s410, obtaining the difference value between the maximum value of the second derivative of the second line and the maximum value and the minimum value in the first derivative of the second line.
S420, calculating the ratio of the maximum value of the second derivative of the second line to the difference value of the maximum value and the minimum value in the first derivative of the second line as a first ratio.
In this embodiment, the pressure change amount may be represented by calculating a second derivative of the second wire, a maximum value of the pressure change amount is a maximum value of the second derivative of the second wire, and the fluctuation range of the pressure change rate may be represented by calculating a difference between a maximum value and a minimum value in a first derivative of the second wire, further, a ratio of the maximum value of the second derivative of the second wire and the difference between the maximum value and the minimum value in the first derivative of the second wire may be calculated as a first ratio, the degree of curvature of the user's spine may be estimated according to the first ratio, the first ratio may become larger from small as the user's spine stands up to curvature, and the first ratio may well reflect the degree of influence on the curvature of the second wire of the buttocks due to displacement of the small segment occurring due to the curvature of the ischium with the spine.
S430, judging whether the first ratio is larger than a first threshold value.
And S440, if the first ratio is larger than a first threshold value, determining that the spine bending degree of the user sitting in the current sitting posture is too high, and generating a prompt that the current sitting posture of the user is incorrect.
In this embodiment, the seat cushion further includes a wireless communication module, after the first ratio is obtained, it is determined whether the first ratio is greater than a first threshold, if the first ratio is greater than the first threshold, it may be determined that the degree of curvature of the spine when the user sits in the current sitting posture is too high, and a prompt indicating that the current sitting posture of the user is incorrect is generated to the mobile phone or other mobile terminals of the user through the wireless communication module.
Preferably, the cushion can also acquire the first ratio in real time according to a preset time interval or when the first ratio is changed, set a bending degree grade corresponding to the first ratio, convert the first ratio into a corresponding bending degree grade and send the corresponding bending degree grade to a mobile terminal of a user, and the user can check the bending degree grade of the user in a sitting time period in real time, so that the user knows sitting habit of the user and feeds back to provide corresponding help advice.
According to the embodiment of the invention, through further optimization processing of the first line pressing, cushion and three-dimensional pressure distribution map data, more representative line segments and parameters are selected for evaluation, so that the spine bending degree of a user can be evaluated more accurately, and the sitting posture of the user can be evaluated more accurately.
As shown in fig. 10, in one embodiment, a sitting posture assessment apparatus is provided, where the sitting posture assessment apparatus provided in this embodiment may perform the sitting posture assessment method provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method. The sitting posture assessment device comprises a data acquisition module 100, a coordinate acquisition module 200, a plane acquisition module 300, a line pressing acquisition module 400 and a user assessment module 500.
Specifically, the data acquisition module 100 is configured to acquire three-dimensional pressure distribution map data corresponding to a current sitting posture of a user in a sitting process of the user through pressure sensors in a cushion, where the pressure sensors are distributed in an array form in the cushion; the coordinate acquisition module 200 is configured to acquire, as a first three-dimensional coordinate, a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data; the plane acquisition module 300 is configured to make a plane perpendicular to the seat cushion and parallel to the leg direction of the user through the first three-dimensional coordinate as a first plane; the line pressing acquisition module 400 is configured to use an intersection line where the first plane intersects the three-dimensional pressure distribution map data as a first line pressing; the user evaluation module 500 is configured to evaluate a degree of curvature of a vertebra of a user sitting in the current sitting posture according to a pressure change on the first pressure line, so as to evaluate whether the current sitting posture of the user is correct.
In an embodiment, the user evaluation module 500 is specifically configured to determine, according to the first three-dimensional coordinate and the first pressing line, a second pressing line, where the second pressing line is a line segment on the first pressing line in a direction from the leg to the hip of the user, starting from the first three-dimensional coordinate; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the second pressure line.
In an embodiment, the user evaluation module 500 is specifically further configured to calculate a maximum value of the pressure variation between adjacent pressure sensors and a fluctuation range of the pressure variation rate according to the second pressing line; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the maximum value of the pressure change quantity and the fluctuation amplitude of the pressure change rate.
In one embodiment, the user evaluation module 500 is specifically further configured to: and obtaining the difference value between the maximum value of the second derivative of the second line and the maximum value and the minimum value in the first derivative of the second line.
In an embodiment, the user evaluation module 500 is specifically further configured to calculate, as the first ratio, a ratio of a maximum value of the second derivative of the second line to a difference value between a maximum value and a minimum value of the first derivative of the second line; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the first ratio.
In an embodiment, the user evaluation module 500 is specifically further configured to determine whether the first ratio is greater than a first threshold; and if the first ratio is larger than a first threshold value, determining that the spine bending degree of the user sitting in the current sitting posture is too high, and generating a prompt that the current sitting posture of the user is incorrect.
In one embodiment, the coordinate acquisition module 200 is specifically configured to perform gaussian filtering on the three-dimensional pressure distribution map data. And acquiring coordinates of a point with the maximum pressure in the corrected three-dimensional pressure distribution map data as a first three-dimensional coordinate.
Figure 11 illustrates an internal structural view of the seat cushion in one embodiment. As shown in fig. 11, the cushion includes a processor, a memory, a network interface, and pressure sensors distributed in an array, connected by a system bus. The memory includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the seat cushion stores an operating system and may also store a computer program which, when executed by the processor, causes the processor to implement a sitting posture assessment method. The internal memory may also have stored therein a computer program which, when executed by the processor, causes the processor to perform a sitting posture assessment method. It will be appreciated by those skilled in the art that the structure shown in fig. 11 is merely a block diagram of a portion of the structure associated with the present application and is not intended to limit the seat cushion to which the present application is applied, and that a particular seat cushion may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is presented comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of:
acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through pressure sensors in a cushion, wherein the pressure sensors are distributed in the cushion in an array mode;
acquiring a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
a plane perpendicular to the seat cushion and parallel to the leg direction of the user is made through the first three-dimensional coordinates to be used as a first plane;
taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct.
In one embodiment, said estimating the degree of curvature of the spine of the user sitting in said current sitting position based on the pressure change on said first pressure line comprises: determining a second pressing line according to the first three-dimensional coordinate and the first pressing line, wherein the second pressing line is a line segment on the first pressing line in the direction from the legs to the buttocks of the user by taking the first three-dimensional coordinate as a starting point; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the second pressure line.
In one embodiment, the estimating the degree of curvature of the spine when the user sits in the current sitting posture according to the pressure change on the second pressure line includes: calculating the maximum value of the pressure variation and the fluctuation amplitude of the pressure variation rate between the adjacent pressure sensors according to the second pressing line; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the maximum value of the pressure change quantity and the fluctuation amplitude of the pressure change rate.
In one embodiment, the calculating the maximum value of the pressure variation and the fluctuation amplitude of the pressure variation rate between the adjacent pressure sensors according to the second pressing line includes: and obtaining the difference value between the maximum value of the second derivative of the second line and the maximum value and the minimum value in the first derivative of the second line.
In one embodiment, the estimating the degree of curvature of the spine when the user sits in the current sitting posture according to the maximum value of the pressure change amount and the fluctuation range of the pressure change rate includes: calculating the ratio of the maximum value of the second derivative of the second line to the difference value of the maximum value and the minimum value in the first derivative of the second line as a first ratio; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the first ratio.
In one embodiment, said evaluating whether the current sitting position of the user is correct comprises: judging whether the first ratio is larger than a first threshold value or not; and if the first ratio is larger than a first threshold value, determining that the spine bending degree of the user sitting in the current sitting posture is too high, and generating a prompt that the current sitting posture of the user is incorrect.
In one embodiment, the acquiring the three-dimensional coordinates of the point with the maximum pressure in the three-dimensional pressure distribution map data includes, as the first three-dimensional coordinates: and carrying out Gaussian filtering processing on the three-dimensional pressure distribution map data. And acquiring coordinates of a point with the maximum pressure in the corrected three-dimensional pressure distribution map data as a first three-dimensional coordinate.
In one embodiment, a computer-readable storage medium is provided, storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through pressure sensors in a cushion, wherein the pressure sensors are distributed in the cushion in an array mode;
acquiring a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
a plane perpendicular to the seat cushion and parallel to the leg direction of the user is made through the first three-dimensional coordinates to be used as a first plane;
taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct.
In one embodiment, said estimating the degree of curvature of the spine of the user sitting in said current sitting position based on the pressure change on said first pressure line comprises: determining a second pressing line according to the first three-dimensional coordinate and the first pressing line, wherein the second pressing line is a line segment on the first pressing line in the direction from the legs to the buttocks of the user by taking the first three-dimensional coordinate as a starting point; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the pressure change on the second pressure line.
In one embodiment, the estimating the degree of curvature of the spine when the user sits in the current sitting posture according to the pressure change on the second pressure line includes: calculating the maximum value of the pressure variation and the fluctuation amplitude of the pressure variation rate between the adjacent pressure sensors according to the second pressing line; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the maximum value of the pressure change quantity and the fluctuation amplitude of the pressure change rate.
In one embodiment, the calculating the maximum value of the pressure variation and the fluctuation amplitude of the pressure variation rate between the adjacent pressure sensors according to the second pressing line includes: and obtaining the difference value between the maximum value of the second derivative of the second line and the maximum value and the minimum value in the first derivative of the second line.
In one embodiment, the estimating the degree of curvature of the spine when the user sits in the current sitting posture according to the maximum value of the pressure change amount and the fluctuation range of the pressure change rate includes: calculating the ratio of the maximum value of the second derivative of the second line to the difference value of the maximum value and the minimum value in the first derivative of the second line as a first ratio; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the first ratio.
In one embodiment, said evaluating whether the current sitting position of the user is correct comprises: judging whether the first ratio is larger than a first threshold value or not; and if the first ratio is larger than a first threshold value, determining that the spine bending degree of the user sitting in the current sitting posture is too high, and generating a prompt that the current sitting posture of the user is incorrect.
In one embodiment, the acquiring the three-dimensional coordinates of the point with the maximum pressure in the three-dimensional pressure distribution map data includes, as the first three-dimensional coordinates: and carrying out Gaussian filtering processing on the three-dimensional pressure distribution map data. And acquiring coordinates of a point with the maximum pressure in the corrected three-dimensional pressure distribution map data as a first three-dimensional coordinate.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto. Please input the implementation content section.
Claims (8)
1. A method of sitting posture assessment, the method comprising:
acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of a user in the sitting process of the user through pressure sensors in a cushion, wherein the pressure sensors are distributed in the cushion in an array mode;
acquiring a three-dimensional coordinate of a point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
a plane perpendicular to the seat cushion and parallel to the leg direction of the user is made through the first three-dimensional coordinates to be used as a first plane;
taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
evaluating the degree of spine bending of a user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct;
the estimating the degree of curvature of the spine of the user while sitting in the current sitting position based on the pressure change on the first pressure line includes: determining a second pressing line according to the first three-dimensional coordinate and the first pressing line, wherein the second pressing line is a line segment on the first pressing line in the direction from the legs to the buttocks of the user by taking the first three-dimensional coordinate as a starting point; evaluating a degree of spine curvature of a user seated in the current sitting position according to the pressure change on the second pressure line;
the estimating the degree of curvature of the spine of the user sitting in the current sitting position according to the pressure change on the second pressure line comprises: calculating the maximum value of the pressure variation and the fluctuation amplitude of the pressure variation rate between the adjacent pressure sensors according to the second pressing line; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the maximum value of the pressure change quantity and the fluctuation amplitude of the pressure change rate.
2. The method of claim 1, wherein calculating a maximum value of the pressure variation amount and a fluctuation amplitude of the pressure variation rate between adjacent pressure sensors from the second pressing line comprises:
and obtaining the difference value between the maximum value of the second derivative of the second line and the maximum value and the minimum value in the first derivative of the second line.
3. The method of claim 2, wherein said estimating the degree of curvature of the spine of the user while sitting in the current sitting position based on the maximum value of the amount of pressure change and the fluctuation range of the rate of pressure change comprises:
calculating the ratio of the maximum value of the second derivative of the second line to the difference value of the maximum value and the minimum value in the first derivative of the second line as a first ratio;
and evaluating the spine bending degree of the user sitting in the current sitting posture according to the first ratio.
4. A method according to claim 3, wherein said assessing whether the current sitting position of the user is correct comprises:
judging whether the first ratio is larger than a first threshold value or not;
and if the first ratio is larger than a first threshold value, determining that the spine bending degree of the user sitting in the current sitting posture is too high, and generating a prompt that the current sitting posture of the user is incorrect.
5. The method of claim 1, wherein the acquiring the three-dimensional coordinates of the point of maximum pressure in the three-dimensional pressure profile data, as the first three-dimensional coordinates, further comprises:
and carrying out Gaussian filtering processing on the three-dimensional pressure distribution map data.
6. A sitting posture assessment apparatus, the apparatus comprising:
the data acquisition module is used for acquiring three-dimensional pressure distribution map data corresponding to the current sitting posture of the user in the sitting process of the user through pressure sensors in a cushion, and the pressure sensors are distributed in the cushion in an array mode;
the coordinate acquisition module is used for acquiring the three-dimensional coordinate of the point with the maximum pressure in the three-dimensional pressure distribution map data as a first three-dimensional coordinate;
the plane acquisition module is used for taking a plane which is perpendicular to the seat cushion and parallel to the leg direction of the user through the first three-dimensional coordinate as a first plane;
the line pressing acquisition module is used for taking an intersection line of the first plane and the three-dimensional pressure distribution map data as a first line pressing;
the user evaluation module is used for evaluating the spine bending degree of a user sitting in the current sitting posture according to the pressure change on the first pressure line so as to evaluate whether the current sitting posture of the user is correct;
the user evaluation module is specifically configured to: determining a second pressing line according to the first three-dimensional coordinate and the first pressing line, wherein the second pressing line is a line segment on the first pressing line in the direction from the legs to the buttocks of the user by taking the first three-dimensional coordinate as a starting point; evaluating a degree of spine curvature of a user seated in the current sitting position according to the pressure change on the second pressure line;
the user evaluation module is further used for calculating the maximum value of the pressure variation and the fluctuation amplitude of the pressure variation rate between the adjacent pressure sensors according to the second pressing line; and evaluating the spine bending degree of the user sitting in the current sitting posture according to the maximum value of the pressure change quantity and the fluctuation amplitude of the pressure change rate.
7. A computer device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method of any of claims 1 to 5.
8. A computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the method of any one of claims 1 to 5.
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| EP1317198A1 (en) * | 2000-08-31 | 2003-06-11 | Myoung-Ho Cho | Sitting means having sensing device |
| JP2004085435A (en) * | 2002-08-28 | 2004-03-18 | Matsushita Electric Works Ltd | Apparatus for evaluating seated state and chair to which the same is mounted |
| CN106781320B (en) * | 2016-12-23 | 2023-06-30 | 孔祥华 | Writing gesture monitoring and reminding system |
| CN107945467A (en) * | 2017-12-20 | 2018-04-20 | 中国科学院合肥物质科学研究院 | A kind of Portable sitting monitoring and system for prompting based on buttocks Pressure Distribution |
| CN108814616B (en) * | 2018-04-12 | 2021-11-05 | 深圳和而泰数据资源与云技术有限公司 | Sitting posture identification method and intelligent seat |
| CN110897423A (en) * | 2019-12-03 | 2020-03-24 | 江南大学 | Intelligent cushion system and pressure detection method |
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