CN108606799A - A kind of sitting posture suitable for computer user measures and alarm set - Google Patents

Abstract

The invention discloses a sitting posture measurement and reminding device suitable for computer users, which comprises a posture detection unit, a parameter setting and alarm unit, and a communication module linking the two units. The core function of the posture detection unit is to collect human posture data through the inertial sensor group, the microprocessor solves the human posture information in real time, and judges the rationality of the human sitting posture according to the set posture alarm threshold; the main function of the parameter setting and alarm unit is to receive The analysis results are displayed on the computer screen, and the setting of working parameters such as attitude alarm threshold, alarm delay time, alarm mode, and sedentary reminder time is completed; the communication module realizes data transmission between two units. The attitude detection unit is fixed at the Dazhui acupoint of the human body during use, and the parameter setting and alarm unit is mainly an application software installed on the computer end, which completes the functions of display reminder and parameter setting module.

Description

A sitting posture measuring and reminding device suitable for computer users

technical field

The invention relates to a device for measuring posture parameters and reminding unreasonable sitting postures of people who have been sitting in front of computers for a long time, and belongs to the field of human posture correction.

Background technique

It has been proved by medicine that sedentary for a long time, combined with unreasonable sitting posture, is prone to lumbar muscle fatigue, damages the health of the spine, and eventually leads to lumbar disc herniation, lumbar spinal stenosis and other diseases. Therefore, for urban white-collar workers and online gamers who work in front of computers for a long time, it is very important to keep a good sitting posture on the computer and relax and rest at appropriate intervals.

The methods of human posture detection usually include: 1. Multi-view synthesis in a fixed field of view. Generally, two or more camera lenses capture human body images from different angles, and then reconstruct them according to the spatial relationship to obtain human posture information; 2. Use Ultrasonic, infrared and other ranging methods measure a point on the body and the position from the specified measurement point, and estimate the attitude; 3. Use the attitude sensor to directly measure the change data of the human body attitude, and calculate the attitude information.

In the domestic patent 94226378.2, the inventor disclosed an electronic posture correction device composed of horizontal switches, music modules and other components, which realized the reminder of the user's sitting posture exceeding the limit in the front and rear directions, but the posture information could not be obtained in real time. In recent years, with the development of micro-sensor technology and smart wearable devices, human posture and motion detection technology has also been successfully applied to the field of smart wearable devices. In the patent 200910028156.X, the inventor disclosed a miniature multifunctional intelligent device that uses an acceleration sensor to detect human body posture, which can realize posture detection in various situations such as relatively stationary, walking or riding. U.S. wearable device manufacturer Lumo Bodytech uses similar technology to launch a smart posture correction device, which can set the correct sitting, standing and walking posture with the help of ergonomic principles, and prompts correction through slight vibration. There are also similar products in China. This type of product is mainly used for the application of mobile terminals such as mobile phones. For people who use computers for a long time, especially when they are highly concentrated, they are not very targeted and the effect is not ideal.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a kind of sitting posture measurement and reminding device suitable for computer users, which utilizes the micro inertial sensor group to collect posture data, cooperates with the microprocessor to analyze the human sitting posture; If the user's sitting posture is unreasonable or sedentary overtime, the user can be reminded more intuitively by means of floating display on the computer screen, realizing bad sitting posture and sedentary overtime reminder, and helping computer users develop good sitting posture and work and rest habits.

Technical scheme: in order to achieve the above object, the technical scheme adopted in the present invention is:

A sitting posture measurement and reminder device suitable for computer users, including a posture detection unit and a parameter setting and alarm unit; Posture information, by comparing the posture information of the human body with the preset alarm threshold, it is judged whether the sitting posture of the human body is reasonable; if it is unreasonable, an alarm is issued through the parameter setting and the alarm unit.

Preferably, the posture detection unit fits an elliptical vertebral body according to the posture measurement reference point determined when the posture of the upper body of the human body is correct, the threshold of the forward lean of the upper body of the human body and the threshold of the roll of the upper body of the human body. Range, the boundary of the elliptical cone is the alarm threshold; if it is detected that the inertial sensor is within the reasonable range of the human sitting posture, it is considered that the human sitting posture is reasonable.

A specific confirmation method of the attitude warning threshold is as follows:

(1) Determine the position of the attitude measurement point and the correct upper body posture using the computer: attach the inertial sensor to the Dazhui point on the back of the human body (adhesive stickers, clamping, etc. are used to install it on the skin or on clothes that are more compliant with the skin) ), when the posture of the upper body of the human body is correct, determine the position of the inertial sensor at this time as the reference point for posture measurement;

(2) Determine the forward lean threshold: when the upper body posture of the human body is correct, lean the upper body of the human body forward to the maximum reasonable range, and the maximum angle at which the inertial sensor tilts forward relative to the vertical direction is the forward lean threshold;

(3) Determine the roll threshold: when the upper body posture of the human body is correct, the upper body of the human body is tilted to the maximum reasonable range, and the maximum angle at which the inertial sensor tilts sideways relative to the vertical direction is the roll threshold;

(4) Determine the attitude alarm threshold: take the vertical line where the attitude measurement reference point is located as the central axis, take the center of the nucleus pulposus of the human lumbar disc as the vertex, and fit the elliptical vertebral body with the forward tilt threshold and rollover threshold. The internal area of the body is the reasonable range of human sitting posture, and the boundary of the elliptical cone is the alarm threshold; the long axis direction of the elliptical vertebral body is the direction of left and right inclination, and the short axis direction is the direction of forward and backward inclination.

Another specific method for confirming the attitude warning threshold is as follows:

(1) Determine the position of the attitude measurement point and the correct upper body posture using the computer: install the inertial sensor close to the Dazhui point on the back of the human body. When the upper body posture of the human body is correct, determine the position of the inertial sensor at this time as the attitude measurement reference point;

(2) Determine the anteversion threshold: take the center of the nucleus pulposus of the human lumbar intervertebral disc as the vertex, and the inertial sensor is inclined 15-25° to the front side relative to the vertical direction, and this inclination angle is used as the anteversion threshold;

(3) Determine the roll threshold: take the center of the nucleus pulposus of the human lumbar disc as the vertex, and the inertial sensor is tilted 10-15° to the front side relative to the vertical direction, and this tilt angle is used as the roll threshold;

(4) Determine the attitude alarm threshold: take the vertical line where the attitude measurement reference point is located as the central axis, take the center of the nucleus pulposus of the human lumbar disc as the vertex, and fit the elliptical vertebral body with the forward tilt threshold and rollover threshold. The internal area of the body is the reasonable range of human sitting posture, and the boundary of the elliptical cone is the alarm threshold; the long axis direction of the elliptical vertebral body is the direction of left and right inclination, and the short axis direction is the direction of forward and backward inclination.

Another specific confirmation method of the attitude warning threshold is as follows:

(1) Determine the position of the attitude measurement point and the correct upper body posture using the computer: install the inertial sensor close to the Dazhui point on the back of the human body. When the upper body posture of the human body is correct, determine the position of the inertial sensor at this time as the attitude measurement reference point;

(2) Determine the forward leaning threshold: When the upper body posture of the human body is correct, adjust the height of the desktop until the hands are flush with the keyboard; when the elbows are bent upwards until they are vertically supported on the desktop, and the jaw is supported by fists with both hands, the inertial sensor is relatively vertical. The angle of leaning forward is the forward leaning threshold;

(3) Determine the roll threshold: When the upper body posture of the human body is correct, adjust the height of the desktop until the hand is flush with the keyboard; when one elbow is bent upwards until it is vertically supported on the desktop, and the lower jaw is supported by a fist with one hand, the inertial sensor is relatively vertical The angle at which the direction is tilted to the side is the roll threshold;

(4) Determine the attitude alarm threshold: take the vertical line where the attitude measurement reference point is located as the central axis, take the center of the nucleus pulposus of the human lumbar disc as the vertex, and fit the elliptical vertebral body with the forward tilt threshold and rollover threshold. The internal area of the body is the reasonable range of human sitting posture, and the boundary of the elliptical cone is the alarm threshold; the long axis direction of the elliptical vertebral body is the direction of left and right inclination, and the short axis direction is the direction of forward and backward inclination.

For the confirmation of the above posture alarm threshold, we can use image technology for auxiliary confirmation. Specifically, it also includes an image acquisition unit. Auxiliary judgment on whether the human body movement is correct or not.

Preferably, the parameter setting and warning is a sound alarm or a screen warning window in the form of a floating window.

Preferably, the posture detection unit is connected to the USB interface of the computer via bluetooth.

Beneficial effects: the sitting posture measuring and reminding device suitable for computer users provided by the present invention has the following advantages compared with the prior art: 1. The reasonable range of posture and the design method of the alarm threshold can realize all-round spatial monitoring Continuous judgment, combined with the determined position of the attitude measurement point, greatly improves the effectiveness and accuracy of the alarm; 2. Using the hardware combination of the inertial sensor and the microprocessor, the attitude calculation and analysis can be completed independently in the attitude detection unit, avoiding the The existing technology relies heavily on the defect of mobile terminal computing ability, which also reduces the communication burden of the two units and improves the flexibility of device use; 3. The display and alarm in the form of a floating window are realized on the computer monitor, which is more in line with the habits of computer users .

Description of drawings

Fig. 1 is a block diagram of the present invention;

Fig. 2 is a structural block diagram of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, a sitting posture measuring and reminding device suitable for computer users includes a posture detection unit, a parameter setting and alarm unit, and a communication module for these two units. The core function of the posture detection unit is to collect human posture data through the inertial sensor group, the microprocessor solves the human posture information in real time, and judges the rationality of the human sitting posture according to the set posture alarm threshold; the main function of the parameter setting and alarm unit is to complete the posture Alarm threshold, alarm delay time, alarm mode, sedentary reminder time and other working parameters are set, and the received analysis results are displayed on the computer screen; the communication module realizes data transmission between two units. The attitude detection unit is fixed at the Dazhui acupoint of the human body during use, and the parameter setting and alarm unit is mainly an application software installed on the computer end to complete the functions of display reminder and parameter setting. At the same time, in order to reasonably set the attitude warning threshold, we also combined with ergonomic principles to give a method to determine the attitude warning threshold, so as to realize continuous detection in all directions in space.

In this case, the posture detection unit is an independent hardware system installed at the Dazhui point on the back of the human body to realize the functions of real-time collection of human body posture data, posture calculation, and comparison and judgment with preset alarm thresholds. The alarm and parameter setting unit is set on the computer side and is an application program installed on the computer side. Its main functions include: 1. Display the received information on the computer screen in the form of a floating window, and complete the corresponding response according to the posture analysis results. Alarm function; 2. Set working parameters such as attitude alarm threshold, alarm delay time, alarm mode, sedentary reminder time; 3. According to needs, cooperate with the state detection unit to complete the initialization of the attitude alarm threshold.

The core hardware of the attitude detection unit includes a six-axis inertial measurement sensor and a microprocessor, the six-axis inertial measurement sensor is used to collect human body attitude data; the microprocessor is used as the main control center of the unit for attitude calculation and analysis and judgment , the logic control of this unit, etc.; Bluetooth I realizes the short-distance wireless communication with the computer, and completes the data interaction with the computer terminal. The parameter setting and alarm unit works on the computer side, including Bluetooth II paired with Bluetooth I, an application software installed on the computer and a floating window on the display, which are used to realize posture result display, bad posture warning, sedentary reminder, And the parameter setting of the device and other functions. Considering the wearability, the components in the attitude detection unit all adopt low power consumption devices.

This case also provides a method for determining the attitude warning threshold based on ergonomic principles. First, determine the position of the attitude measurement reference point and the correct upper body posture using the computer: install the inertial sensor on the Dazhui point on the back of the human body. obtained from this reference point. The correct human sitting posture for using the computer is: the upper body takes the waist as the axis, the chest is kept upright to keep the neck upright, the head is supported, and the distance between the chest and the table is kept 15-20cm, the shoulders are naturally drooping, and the upper arms are naturally close to the body , bend the elbow to 90°, place the forearm on the table, and place the hand flush with the keyboard. Secondly, determine the reasonable ranges of forward leaning and lateral leaning respectively. Based on the above-mentioned correct human body posture, the reasonable range of body leaning forward is as follows: the elbows are naturally stretched forward, placed on the table in front, and the hands are clenched fists resting on the chin; the reasonable range of body roll is as follows: one elbow is naturally stretched forward, placed on the On the table in front, the forearm is vertical to the table, and the fist is naturally resting on the cheek. Thirdly, on the horizontal plane of the measurement point, based on the aforementioned forward tilt and left and right side tilt measurement data, an elliptical vertebral body is fitted. If it exceeds the range of the elliptical vertebral body, it can be considered as an unreasonable sitting posture and an alarm is required.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (8)

1. a kind of sitting posture measurement and reminding device being applicable to computer user, it is characterized in that: comprise posture detection unit and parameter setting and alarm unit; Described posture detection unit is installed on human body end, collects human body posture data in real time by inertial sensor, Solve the human body posture information through the microprocessor, and judge whether the human body sitting posture is reasonable by comparing the human body posture information with the preset alarm threshold; if it is unreasonable, it will alarm through the parameter setting and alarm unit. 2. The sitting posture measuring and reminding device suitable for computer users according to claim 1, characterized in that: the posture detection unit determines the posture measurement reference point, the upper body forward leaning threshold and The upper body roll threshold of the human body is fitted to an elliptical vertebral body. The internal area of the elliptical vertebral body is the reasonable range of human sitting posture, and the boundary of the elliptical cone is the alarm threshold. If the inertial sensor is detected to be within the reasonable range of human sitting posture, it is considered that the human sitting posture is Reasonable. 3. The sitting posture measurement and reminding device applicable to computer users according to claim 1, wherein the posture warning threshold is confirmed by the following method: (1) Determine the position of the attitude measurement point and the correct upper body posture using the computer: install the inertial sensor close to the Dazhui point on the back of the human body. When the upper body posture of the human body is correct, determine the position of the inertial sensor at this time as the attitude measurement reference point; (2) Determine the forward lean threshold: when the upper body posture of the human body is correct, lean the upper body of the human body forward to the maximum reasonable range, and the maximum angle at which the inertial sensor tilts forward relative to the vertical direction is the forward lean threshold; (3) Determine the roll threshold: when the upper body posture of the human body is correct, the upper body of the human body is tilted to the maximum reasonable range, and the maximum angle at which the inertial sensor tilts sideways relative to the vertical direction is the roll threshold; (4) Determine the attitude alarm threshold: take the vertical line where the attitude measurement reference point is located as the central axis, take the center of the nucleus pulposus of the human lumbar disc as the vertex, and fit the elliptical vertebral body with the forward tilt threshold and rollover threshold. The internal area of the body is the reasonable range of human sitting posture, and the boundary of the elliptical cone is the alarm threshold; the long axis direction of the elliptical vertebral body is the direction of left and right inclination, and the short axis direction is the direction of forward and backward inclination. 4. The sitting posture measurement and reminder device suitable for computer users according to claim 1, wherein: the posture warning threshold is confirmed by the following method: (1) Determine the position of the attitude measurement point and the correct upper body posture using the computer: install the inertial sensor close to the Dazhui point on the back of the human body. When the upper body posture of the human body is correct, determine the position of the inertial sensor at this time as the attitude measurement reference point; (2) Determine the anteversion threshold: take the center of the nucleus pulposus of the human lumbar intervertebral disc as the vertex, and the inertial sensor is inclined 15-25° to the front side relative to the vertical direction, and this inclination angle is used as the anteversion threshold; (3) Determine the roll threshold: take the center of the nucleus pulposus of the human lumbar disc as the vertex, and the inertial sensor is tilted 10-15° to the front side relative to the vertical direction, and this tilt angle is used as the roll threshold; (4) Determine the attitude alarm threshold: take the vertical line where the attitude measurement reference point is located as the central axis, take the center of the nucleus pulposus of the human lumbar disc as the vertex, and fit the elliptical vertebral body with the forward tilt threshold and rollover threshold. The internal area of the body is the reasonable range of human sitting posture, and the boundary of the elliptical cone is the alarm threshold; the long axis direction of the elliptical vertebral body is the direction of left and right inclination, and the short axis direction is the direction of forward and backward inclination. 5. The sitting posture measurement and reminding device applicable to computer users according to claim 1, wherein: the posture warning threshold is confirmed by the following method: (1) Determine the position of the attitude measurement point and the correct upper body posture using the computer: install the inertial sensor close to the Dazhui point on the back of the human body. When the upper body posture of the human body is correct, determine the position of the inertial sensor at this time as the attitude measurement reference point; (2) Determine the forward leaning threshold: When the upper body posture of the human body is correct, adjust the height of the desktop until the hands are flush with the keyboard; when the elbows are bent upwards until they are vertically supported on the desktop, and the jaw is supported by fists with both hands, the inertial sensor is relatively vertical. The angle of leaning forward is the forward leaning threshold; (3) Determine the roll threshold: When the upper body posture of the human body is correct, adjust the height of the desktop until the hand is flush with the keyboard; when one elbow is bent upwards until it is vertically supported on the desktop, and the lower jaw is supported by a fist with one hand, the inertial sensor is relatively vertical The angle at which the direction is tilted to the side is the roll threshold; (4) Determine the attitude alarm threshold: take the vertical line where the attitude measurement reference point is located as the central axis, take the center of the nucleus pulposus of the human lumbar disc as the vertex, and fit the elliptical vertebral body with the forward tilt threshold and rollover threshold. The internal area of the body is the reasonable range of human sitting posture, and the boundary of the elliptical cone is the alarm threshold; the long axis direction of the elliptical vertebral body is the direction of left and right inclination, and the short axis direction is the direction of forward and backward inclination. 6. The sitting posture measuring and reminding device suitable for computer users according to claim 5, characterized in that: it also includes an image acquisition unit, the image acquisition unit detects the posture of the upper body of the human body, fists with both hands to support the lower jaw, and fists with one hand to support the lower jaw The image is collected, and the auxiliary judgment is made on whether the human body movement is correct or not. 7. The sitting posture measuring and reminding device suitable for computer users according to claim 1, characterized in that: the parameter setting and warning unit is a sound alarm or a screen warning window in the form of a floating window. 8. The sitting posture measuring and reminding device suitable for computer users according to claim 1, characterized in that: the posture detection unit is connected to the computer USB interface through bluetooth.