WO2018199377A1 - Automatic guidance system for correct sitting posture - Google Patents

Abstract

The present invention relates to an automatic guidance system for correct sitting posture, the system guiding correct sitting posture by automatically analyzing the sitting posture of a seated person using a chair or a cushion, and comprising: a seat package embedded in a chair or a cushion and having a pressure sensor array in which a plurality of pressure sensors are arranged in a line in the right and left directions; and a portable electronic device, which extracts a transverse center of contour (COC) through the outermost point at which a pressure value is measured from the plurality of pressure sensors, calculates, on the basis of pressure values measured by the plurality of pressure sensors, a transverse center of mass (COM) so as to extract a transverse posture variation vector having the transverse center of contour as a starting point and having the transverse center of mass as an ending point, and executes a warning or a program for correct posture guidance if the absolute size of the transverse posture variation vector is greater than a predetermined set value. Therefore, an accurate posture diagnosis can be made so as to be suitable for the sitting posture of a seated person.

Description

Correct sitting posture automatic guidance system

The present invention relates to a correct sitting posture automatic guidance system for automatically analyzing a sitting posture of a seated person using a chair or a cushion to derive the correct sitting posture.

Prior arts belonging to the same technical field as the present invention include Patent Application No. 2014-0045020 'Sitting position analysis system and method', Patent Application No. 2014-0148418 'Seat position measuring device, Seating posture analysis system and method', patent Patent Application No. 10-2015-0051169 discloses a number of inventions, including a seat-based data analysis system for improving self-regulation ability.

In particular, the invention having a concept similar to the present invention has been disclosed in Patent Application No. 10-2014-0037867 'posture correction method, posture management device and posture correction system using the same'.

However, since the prior art including the invention disclosed in the above patents does not provide a method for accurately and efficiently determining the sitting position of a seated occupant using a chair or a cushion, there is room for making a wrong diagnosis by incorrectly determining the sitting position. There was a problem that it was impossible to propose a proper customized calibration method.

Accordingly, it is an object of the present invention to provide a correct seat posture automatic guidance system of an improved form to accurately and efficiently understand the seated posture of the seated occupant.

In order to achieve the above object, the present invention provides a correct sitting posture automatic induction system, a pressure sensor array (array) that is embedded in a chair or a cushion, a plurality of pressure sensors are arranged in a row in the horizontal direction, and the plurality of A seat package having a package side control unit for calculating a pressure value measured from the pressure sensor; And receiving the pressure value from the package side controller in a wired or wireless manner, and a transverse seating range and a transverse seating contour center made by the seater through the outermost point where the pressure value is measured among the plurality of pressure sensors. Of Contour, COC) and calculates the center of mass (COM) made by the seated occupant based on the magnitude of the pressure value measured from the plurality of pressure sensors and the position of each pressure sensor. Extracting a transverse posture disparity vector having the transverse sitting contour center as a starting point and the transverse center of gravity as an end point, and inducing correct posture when the absolute magnitude of the transverse posture disparity vector is larger than a predetermined value. A terminal side controller for executing a warning to the program; A storage unit for providing the terminal with the warning or program for the correct posture derivation; It provides a correct sitting posture automatic guidance system comprising a portable electronic device having an output unit for outputting the warning or program by the control unit.

Here, the terminal-side control unit may be configured to execute a warning or a program for deriving the correct posture when the lateral posture variation vector lasts for a predetermined time within a predetermined error range.

The correct sitting posture automatic guidance system may further include a server configured to store a warning or program for correct posture guidance and wirelessly transmit the program to the portable electronic device.

On the other hand, in order to achieve the above object, the present invention, in the correct sitting posture automatic guidance system, the pressure sensor array and a plurality of pressure sensors are arranged in a chair or a cushion, arranged in a row in the left and right directions, the plurality of pressures A seat package including a package side control unit for calculating a pressure value measured from a sensor, and an alarm unit for correct posture induction operated by an external input; And receiving the pressure value from the package side controller in a wired or wireless manner, and extracting a transverse seating range and a transverse seating contour center made by the seater through the outermost point where the pressure value is measured among the plurality of pressure sensors. And calculating the transverse center of gravity made by the seated occupant based on the magnitude of the pressure value measured from the plurality of pressure sensors and the position of each pressure sensor, and setting the transverse seating contour center as the starting point. And a terminal side controller configured to extract a lateral posture shift vector having a directional weight center as an end point, and to operate the alarm unit by wire or wireless when an absolute magnitude of the lateral posture shift vector is larger than a predetermined value. It provides a correct sitting posture automatic guidance system comprising a portable electronic device.

The storage unit may further include a display unit configured to periodically store the lateral posture variation vector by the terminal side controller, and to display the stored posture variation vector in time series by the terminal side controller. It may be.

In addition, the correct sitting posture induction system, the lateral posture shift vector is periodically received and stored wirelessly by the terminal side control, and transmits the stored lateral posture shift vector to the portable electronic device or the The server may further include a server for wirelessly inquiring according to a request of the portable electronic device.

The portable electronic device may further include a display unit configured to display at least information on the transverse posture shift vector among information on the transverse contour center, the transverse weight center, and the transverse posture shift vector extracted by the terminal side controller. It may also include.

As described above, according to the correct sitting posture automatic induction system according to the present invention, the sitting posture of the seated person can be analyzed more accurately and efficiently by a pressure sensor array built into the chair or the cushion. Therefore, it is possible to make accurate posture diagnosis in accordance with the seated position of the seated person, and to suggest a proper customized correction method for the seated position.

1 is a perspective view of a pressure sensor array that is one component of a correct sitting posture automatic guidance system according to an embodiment of the present invention;

Figure 2 is a plan view showing a state in which the pressure sensor array of Figure 1 is built into the chair,

3A to 3C are plan views illustrating an example of sitting on the pressure sensor array of FIG. 2;

Figure 4 is a block diagram of a correct sitting posture automatic guidance system according to an embodiment of the present invention,

5 is a flowchart illustrating a method of driving the correct sitting posture automatic guidance system of FIG.

6 and 7 are front views exemplarily showing display screens of a portable electronic device which is one component of the correct sitting posture automatic guidance system shown in FIG. 4;

8 is a rear view showing an example of seating to be measured;

9 is a schematic view for explaining the arrangement of the pressure sensor and the posture analysis according to the comparative example with the present invention,

10 is a schematic diagram illustrating a case where the arrangement of the pressure sensor and the embodiment of the present invention are the same, but the posture analysis is different;

11 is a schematic view for explaining the arrangement of the pressure sensor and the posture analysis according to the embodiment of the present invention,

12A and 12B are front views illustrating examples in which a seating range is displayed on a display screen of a portable electronic device that is one component of the correct sitting posture automatic guidance system illustrated in FIG. 4;

13A to 13D illustrate examples in which a transverse sitting contour center, a transverse center of gravity, and a transverse posture shift vector are displayed on a display screen of a portable electronic device that is one component of the correct sitting posture automatic guidance system illustrated in FIG. 4. One front view.

The correct sitting posture automatic guidance system according to an embodiment of the present invention includes a pressure sensor array 10 as shown in FIG. The pressure sensor array 10 is embedded in the chair 1 or cushion as shown in FIG. 2 and used to measure the pressure distribution of the seated person's sitting position.

The pressure sensor array 10 has a structure necessary to efficiently and accurately measure the pressure distribution according to the seated position of the seated occupant, and in particular, as a result of the repeated and in-depth test performed by the inventor of the present invention, as shown in FIGS. 1 and 2. The main band 12 is used for analyzing a structure consisting of a front band 11, a main band 12, and a rear band 13, in particular, a sitting posture based on a transverse direction of a seated person. It was found that taking the structure of a plurality of pressure sensors 12a closely arranged in the left and right directions in the

That is, the main band 12 is a decisive factor in determining the center of contour (Center Of Contour, COC) and transverse center of mass (COM) of the seated to be described later and the other bands (11, 13) The pressure sensor 12a is placed longer and denser than). In the present embodiment, it can be seen that a total of 15 pressure sensors constituting the main band 12.

Unlike the main band 12, the pressure sensors 11a and 13a constituting the front front band 11 and the rear rear band 13 place more weight on the presence or absence of the sensing itself than the strength of the sensing signal.

The front band 11, the main band 12 and the rear band 13 all extend in the horizontal direction and are arranged next to each other. In particular, the main band 12 is disposed between the front band 11 and the rear band 13. Slightly behind the center, ie closer to the rear band 13.

The pressure sensor array 10 having the above-described configuration may take a seating position as shown in FIGS. 3A to 3C when the seated person is seated on the chair 1 in a state of being embedded in the chair 1 of FIG. 2. have.

FIG. 3A shows the seating shape S1 when the seated person is seated in the correct posture, and the remaining sensors 12a-except for the left and right end sensors 12a-1 and 12a-15 of the main band 12. 2 to 12a-14) the sensing signal is generated.

A terminal-side control unit (20 of FIG. 4) to be described later calculates a transverse seating range and a transverse seating contour center (COC) made by the seater based on the presence or absence of the sensing signals. In FIG. 3A, since there are no sensing signals in the sensors 12a-1 and 12a-15 at the left and right ends, and the sensing signals are present in the remaining sensors 12a-2 to 12a-14, the horizontal seating contour center (COC) at this time Becomes the center (COC1) of the transverse seating range defined by the sensor 12a-2 and the sensor 12a-14 which are the left and right outermost sensors in which the sensing signal exists.

That is, the method of calculating the transverse contour center (COC) is as follows.

[Equation 1]

COC = (coordinate of the sensor on the far left of the pressure detected sensor + coordinate of the sensor on the far right of the pressure detected sensor) / 2

In addition, since the terminal-side control unit 20 can obtain the strength of the signal sensed by each of the sensors 12a-2 to 12a-14, that is, the magnitude of the pressure, the strength of these pressures and each corresponding sensor. Based on the positions of (12a-2 to 12a-14) it is possible to calculate the center of mass of the seated person (Center Of Mass, COM, COM1 in Figure 3a).

That is, the method of calculating the transverse center of gravity (COM) is as shown in [Equation 2].

[Equation 2]

Here, X is the center of gravity (COM), x is the horizontal coordinate of each pressure sensor cell, m is the pressure value.

In this case, when the transverse seating contour center (COC) coincides with the transverse weight center (COM), it may be determined that the seated person is sitting in a correct posture, as shown in FIG. 3A. COC1) can be judged as not a correct posture because the center or transverse center of gravity (COM1) is spaced to one side, meaning that the seated person is inclined to one side of the body. In this case, the controller 20 may be implemented to send a guide message leading to the correct posture.

Referring to the seating shape S2 of FIG. 3B, a sensing signal is generated from a total of 12 sensors from the left end sensor 12a-1 to the sensor 12a-12 of the main band 12, and the remaining three ends No signal is generated in the sensors 12a-13 to 12a-15. Therefore, in this case, the transverse seating contour center COC2 becomes the center of the sensor 12a-1 and the sensor 12a-12 at the left end, and the sensors 12a-1 to 12a-12 in which the sensing signal is present. The horizontal center of gravity (COM2) is determined by the position of) and the pressure distribution being sensed. In FIG. 3B, the lateral sitting contour center COC2 and the lateral center of gravity COM2 coincide with each other, and the control unit 20 determines that the seated person is sitting in a correct posture. However, if necessary, the control unit 20 may be implemented to send a guide message to move to the center of the chair to sit.

In the case of the seating shape S3 of FIG. 3C, a sensing signal is generated at the intermediate sensors 12a-4 to 12a-12 of the main band 12, and has a contour center COC3 at the intermediate point thereof, and has a center of gravity ( COM3) also corresponds to the contour center COC3, so that the controller 20 may make a determination with the correct posture.

However, in this case, since the sensing signal does not occur in any of the sensors 13a constituting the rear band 13, the control unit 20 determines that the seated person does not maintain a correct seating posture in the front and rear directions, and thus sits in the front and rear directions. It may also be implemented to send a message to sit in the correct posture with respect to position, ie in the case of FIG. 3C.

Similarly, in the case of the sensors 11a constituting the front band 11, a sensing signal is generated in the three sensors on the left side, for example, when a seated person crosses one leg. If the sensing signal does not occur, it may be determined that the correct seating posture has not been maintained, and the message may be sent to sit in the correct posture.

Meanwhile, signals received from the plurality of pressure sensors 12a constituting the seating shapes S1 to S3 as illustrated in FIGS. 3A to 3C for a predetermined time, for example, the main band 12, are within a predetermined error range. In the case of lasting more than 1 hour in the terminal side control unit 20 may be implemented to send a message recommending a break or a message introducing a stretching program.

The pressure sensor array 10 as described above, as shown in Figure 4, the microcomputer 30 for generating a sensing signal, the seat package (2) together with the communication unit 40 for wireless transmission (Fig. 2) 1) can be embedded on the side.

The terminal-side control unit 20 is a portable electronic device such as a smart phone together with a wireless transmitter / receiver unit 50 for wirelessly receiving a sensing signal and a storage unit 60 storing various messages and stretching programs as described above. It can be built in (3).

FIG. 5 illustrates a procedure executed by the terminal-side control unit 20 as described above. When the seated person sits on the chair 1 in which the pressure sensor array 10 is embedded, the main band 12 is first. From the sensing signal received from the transverse sitting contour center (COC) of the sitting shape is calculated (S10), and then the transverse direction in the sitting shape based on the strength of the signal detected by each sensor, that is, the strength and position of the pressure. Calculate the center of gravity (COM) (S20).

The lateral posture shift vector V having the calculated lateral sitting contour center COC as the starting point and the lateral center of gravity COM as the end point is extracted, and the absolute of the lateral posture shift vector V is extracted. If the size is larger than the predetermined set value C, it is determined as an incorrect posture, and a guide for inducing the correct posture is notified in the form of a message (S40). For example, when the transverse center of gravity COM is located to the left of the transverse seating contour center COC, as shown in FIG. 6, the display unit 71 is a kind of output unit (80 of FIG. 4). Output a message via. Alternatively, at the same time, an alarm may be output through a speaker (not shown) which is a type of the output unit 70.

As shown in FIG. 4, the alarm may be output through the alarm unit 80, which may be additionally provided at the seat package 2 side. That is, the control signal generated by the terminal side control unit 20 is such that the alarm unit 80 is operated through the seat package 2 side control unit 30 wirelessly through the wireless transmission / reception unit 50. This allows the seated person to take a correct posture by sensing vibration and / or warning sounds.

On the other hand, when the calculated transverse posture disparity vector (V) is less than the set value (C) after a predetermined time (ex. 1 hour) elapsed, it is judged to be a long time sitting and guides such as stretching in the form of a message. Notify (S50). For example, as shown in FIG. 7, a guide message for notifying of a long seating fact is sent, and then a message asking whether to execute a program for stretching is sent.

Thus, when the seated person needs the guidance of the stretching program, the stretching program stored in the storage unit 60 is executed by clicking the corresponding 'button' and coaching the seated person's stretching.

Meanwhile, in FIG. 4, the storage unit 60 has been described as already stored in the seated portable electronic device 3. However, the present invention is not limited to this case, and if necessary, the storage unit 60 may be stored in a separate server 4. A warning message and a program for deriving a posture may be stored and wirelessly transmitted according to a request from the portable electronic device 3.

In addition, the terminal-side control unit 20 periodically stores, for example, the lateral posture shift vector V calculated as described above, in the storage unit 60 every hour, and according to the user's selection. 20 may be displayed in time series on the display unit 71 of FIG. 6.

In addition, the lateral posture shift vector V may be received and stored by the terminal side controller 20 to the server 4 through the wireless transceiver 50. In this case, the server 4 may wirelessly transmit the stored transverse posture disparity vector V according to a request of the portable electronic device 3 or inquire wirelessly at the request of the portable electronic device 3. You can also

On the other hand, in the case of having the pressure sensor array 12a of the main band 12 as described above, if the number of sensors arranged in the transverse direction is small, the seated person does not sit exactly on the cushion Even sitting around 1cm ~ 2cm may cause errors in the perception of the posture. For example, if the seated person is sitting in a chair but is sitting on the left side and is inclined to the right (see FIG. 8), the seated person may be incorrectly determined to be tilted to the left. However, when extracting the transverse disparity vector (V) based on the transverse seating contour center (COC) as in the present invention, even if the user is slightly biased to one side on the sensor, the seated person can be correctly recognized to the left or to the right. have.

8, when the seated person 5 is seated on the chair 6 but is inclined to the right while sitting on the left side, the transverse direction is illustrated as shown in FIG. 9. If there are only two pressure sensors 21 and 22, one each on the left and the right, the following phenomenon may occur (the red part in the drawing is the part where the hip is in contact, and the right side is slightly exaggerated Expressed).

That is, only the sensor 21 on the left side is recognized, and the seat 22 is not recognized or only a slight pressure may be sensed by the sensor 22 on the right side. According to this, the transverse posture disparity vector V of -6.0 is only extracted. It is the result of considering only the center line (C) of the seat without considering the seating position of the seated person.

In order to prevent this, according to the present invention, as shown in FIG. 10, if the pressure sensor 12a is closely disposed, even more accurate measurements will be made than the above case even if the reference is based on the center line C of the seat (FIG. At 10, a transverse posture disparity vector (V) of -1.0 was extracted).

However, even if the sensor recognizes well, if it does not recognize the left and right outermost contours, it may also calculate incorrect information. That is, even though the seated person is actually tilted to the right side, the controller may incorrectly calculate that it is tilted to the left side, or even recognize that the seated person is tilted to the right side, and thus may not recognize the degree and give a warning.

Therefore, in order to fully recognize the transverse seating posture, the transverse posture shift vector V should be calculated by recognizing not only the dense sensor 12a but also the left and right contours of the seating site. That is, in FIG. 11, since the three rightmost sensors do not recognize the pressure, the seated position may recognize the bias toward the left. Based on this, the contour can be extracted, and it can be seen that the reference point, which is the horizontal contour center (COC), moves to the left (specifically, the left end sensor 12a-1 and the 12th sensor 12a-12). Middle half of the point). Separately, the transverse center of gravity (COM) can be calculated based on the pressure value and the transverse displacement vector (V = + 0.5) connecting the transverse seating contour center (COC) and the transverse center of gravity (COM) can be calculated. have. That is, considering the seating position of the seated person, the seated person is sitting to the right side slightly.

On the other hand, the terminal-side control unit 20 is also displayed on the display unit 71 based on the coordinates of the sensor located on the leftmost side of the sensor that the pressure of the main band 12 is recognized and the sensor located on the rightmost side where the pressure is recognized. The seating range as shown in 12a can be indicated. The seating range may be displayed by switching to a method of displaying the left and right free space of the seated chair as shown in Figure 12b.

In addition, the transverse seating contour center (COC), the transverse center of gravity (COM) and the transverse posture shift vector extracted by the terminal-side control unit 20 are as shown in FIGS. 13A to 13D. It can also be displayed in).

In FIG. 13A, the transverse sitting contour center is represented by the center line 101, the transverse weight center is represented by the sitting image 102, and the transverse posture shift vector 103 is represented by numbers and arrows.

In FIG. 13B, the transverse sitting contour center is represented by a letter (coc) and a center line 104, the transverse center of gravity is represented by a letter (com) and an arrow 105, and the transverse posture shift vector 106 is represented by numbers and symbols. It can be seen.

In FIG. 13C, the transverse sitting contour center is the letter coc and the center line 107, the transverse center of gravity is the letter com and the coordinate point display 108, and the transverse posture shift vector 109 is the number and the sign. It can be seen that.

In FIG. 13D, the transverse sitting contour center is the letter coc and the center line 110 together with the seating range 110a, the transverse center of gravity is the letter com and the line and arrow 111, and the transverse posture shift vector. It can be seen that 112 is represented by a number and a sign.

" 표시의 횡방향 착석 윤곽중심(coc)으로부터의 방향과 거리를 통해 횡방향 자세 변이 벡터에 관한 정보를 디스플레이할 수도 있다.Meanwhile, as described above, the transverse seating contour center, the transverse center of gravity, and the transverse posture shift vector are displayed as they are in the present invention, but the present invention is not limited thereto. For example, Displaying information about the transverse posture shift vector by adjusting and displaying the inclined direction and the inclined angle of the character sitting on the chair in proportion to the direction and magnitude of the transverse posture shift vector. It can also depend on how. Similarly, as shown in FIG.

It is also possible to display information about the transverse posture disparity vector via the direction and distance from the transverse sitting contour center (coc) of the indication.

Further, by simply displaying the screen color of the display 71 stepwise in yellow, orange, and red according to the magnitude of the transverse posture shift vector, information about the transverse posture shift vector may be displayed.

Since the correct sitting posture automatic guidance system described above is only one embodiment to help understanding of the present invention, it is difficult to understand the scope of the present invention to the technical scope of the present invention.

The scope of the invention to the technical scope is defined by the claims and equivalents described below.

Claims (10)

In the correct sitting posture automatic guidance system, A seat package embedded in a chair or a cushion, the seat package including a pressure sensor array in which a plurality of pressure sensors are arranged in a left and right direction, and a package side controller configured to calculate pressure values measured by the pressure sensors; And Receiving the pressure value from the package side control unit by wire or wirelessly, and the transverse seating range and the transverse center of contour formed by the seated person through the outermost point of the pressure value of the plurality of pressure sensors (Center Of Contour) , COC) and calculates the center of mass (COM) of the seat based on the magnitude of the pressure value measured from the plurality of pressure sensors and the position of each pressure sensor, Extracting a transverse posture shift vector having the transverse contour center as the starting point and the transverse center of gravity as an end point, and a warning for correct posture induction when the absolute magnitude of the transverse posture shift vector is larger than a predetermined value. A terminal side controller for executing the program; A storage unit for providing the terminal with the warning or program for the correct posture derivation; And an output unit for outputting the warning or program by the controller. Correct sitting posture automatic guidance system comprising a. The method of claim 1, The terminal side control unit, And a warning or program for correct posture guidance if the lateral posture shift vector continues for a predetermined time within a predetermined error range. The method of claim 1, And a server for storing the warning or program for the correct posture guidance and wirelessly transmitting the program to the portable electronic device. The method of claim 1, The storage unit periodically stores the lateral posture shift vector by the terminal-side control unit, The portable electronic device, And a display unit in which the stored posture shift vector is displayed in time series by the terminal-side control unit. The method of claim 1, The lateral posture shift vector is periodically received and stored wirelessly by the terminal-side control unit, and the stored lateral posture shift vector is wirelessly transmitted to the portable electronic device or wirelessly inquired at the request of the portable electronic device. Correct sitting posture automatic guidance system, characterized in that it further comprises a server to enable. The method of claim 1, The portable electronic device, The display apparatus may further include a display unit configured to display at least the information about the transverse posture shift vector among the information about the transverse contour center, the transverse weight center, and the transverse posture shift vector extracted by the terminal control unit. Sitting posture automatic induction system. In the correct sitting posture automatic guidance system, A pressure sensor array built in a chair or a cushion, in which a plurality of pressure sensors are arranged in a row in a left-right direction, a package-side control unit for calculating pressure values measured from the plurality of pressure sensors, and a correct operation by an external input A seat package having an alarm unit for inducing posture; And Receiving the pressure value from the package side control unit by wire or wireless, extracting the transverse seating range and the transverse seating contour center made by the seater through the outermost point of the pressure value of the plurality of pressure sensors and Calculating a transverse center of gravity made by the seated occupant based on the magnitude of the pressure value measured from the plurality of pressure sensors and the position of each pressure sensor, and using the transverse contour center as the starting point. A terminal-side control unit which extracts a transverse posture shift vector having a center as an end point and operates the alarm unit in the wired or wireless manner when an absolute magnitude of the transverse posture shift vector is larger than a predetermined value; device Correct sitting posture automatic guidance system comprising a. The method of claim 7, wherein The storage unit periodically stores the lateral posture shift vector by the terminal-side control unit, The portable electronic device, And a display unit in which the stored posture shift vector is displayed in time series by the terminal-side control unit. The method of claim 7, wherein The lateral posture shift vector is periodically received and stored wirelessly by the terminal-side control unit, and the stored lateral posture shift vector is wirelessly transmitted to the portable electronic device or wirelessly inquired at the request of the portable electronic device. Correct sitting posture automatic guidance system, characterized in that it further comprises a server to enable. The method of claim 7, wherein The portable electronic device, The display apparatus may further include a display unit configured to display at least the information about the transverse posture shift vector among the information about the transverse contour center, the transverse weight center, and the transverse posture shift vector extracted by the terminal control unit. Sitting posture automatic induction system.

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