CN-121997292-A - Method and system for optimizing hardness of seat cushion of old people

CN121997292ACN 121997292 ACN121997292 ACN 121997292ACN-121997292-A

Abstract

The invention provides an optimization method and system for softness and hardness of a seat cushion of an old person, wherein the method comprises the steps of collecting lower limb myoelectricity data and cushion body pressure distribution data of the old person in an STS motion process, carrying out root mean square and median frequency analysis on the myoelectricity data, extracting a maximum pressure value, an average contact area and a maximum contact area from the body pressure distribution data, importing the processed myoelectricity data and the body pressure distribution data into statistical analysis software to carry out correlation analysis and secondary linear regression analysis, and selecting target hardness of a cushion material according to analysis results to design the seat cushion of the old person. According to the scheme, through the surface myoelectricity test and the body pressure distribution test, when the old people use cushions with different hardness, the sitting comfort condition of the old people and the fatigue and stress level condition of lower limb muscles of STS are tested, subjective feeling of a subject is combined for analysis, and then the cushion with ideal hardness is designed.

Inventors

LI XUELIAN
ZHU JINGTAO

Assignees

浙江理工大学

Dates

Publication Date: 20260508
Application Date: 20260108

Claims (10)

1. The method for optimizing the hardness of the seat cushion of the old is characterized by comprising the following steps of: S1, collecting lower limb myoelectricity data and cushion body pressure distribution data of the old in the STS movement process; S2, carrying out root mean square and median frequency analysis on the myoelectricity data; s3, extracting a maximum pressure value, an average contact area and a maximum contact area from the body pressure distribution data; S4, performing correlation analysis and secondary linear regression analysis on the processed myoelectricity data and body pressure distribution data; s5, selecting target hardness of the cushion material according to the analysis result, and designing the seat cushion of the old.
2. The method for optimizing the softness and hardness of a seat cushion for an elderly person according to claim 1, wherein the step of s1, after collecting the myoelectric data of the lower limbs and the cushion body pressure distribution data of the elderly person during the STS exercise, comprises, after each time of collecting the data, letting the subject perform subjective evaluation.
3. The method for optimizing the softness and hardness of a seat cushion for an elderly person according to claim 1, wherein in the step of s1, collecting lower limb myoelectricity data and cushion body pressure distribution data of the elderly person during STS exercise, the lower limb myoelectricity data includes myoelectric signals of biceps femoris and rectus femoris.
4. The method for optimizing the softness and hardness of an old person seat cushion according to claim 1, wherein the step of s2 performing root mean square and median frequency analysis on the myoelectric data includes: performing time domain analysis on the myoelectricity data, and calculating to obtain a myoelectricity integral value and a root mean square value; and carrying out frequency domain analysis on the myoelectricity data, and calculating to obtain the median frequency and the average power frequency.
5. The method for optimizing the softness and hardness of a seat cushion for an elderly person according to claim 1, wherein in the step of acquiring lower limb myoelectricity data and cushion body pressure distribution data of the elderly person during STS movement, the cushion body pressure distribution data is acquired by a body pressure distribution measurement system and is used for calculating pressure and area parameters of a contact area of the cushion and a human body.
6. The method for optimizing the softness and hardness of an old seat cushion according to claim 1, wherein in the step of s4 performing a correlation analysis and a quadratic linear regression analysis on the processed myoelectric data and body pressure distribution data, the correlation analysis is used for determining the correlation between the softness and hardness of the cushion and subjective evaluation and objective indexes, respectively, and the quadratic linear regression analysis is used for establishing a model between the softness and hardness of the cushion and muscle mechanical response.
7. The method for optimizing the hardness of an aged seat cushion according to claim 1, wherein S5, in the step of designing the aged seat cushion by selecting cushion materials with related hardness according to the analysis result, the hardness of the cushion materials is 60D-70D according to the analysis result.
8. The seat for the elderly is characterized in that the seat cushion is made of a material with the hardness of 60D-70D, and the hardness of the cushion material is determined by the optimization method according to any one of claims 1 to 7.
9. An optimization system for the softness of an older seat cushion for performing the optimization method of any one of claims 1-7, characterized in that the optimization system comprises: The data acquisition module is used for acquiring lower limb myoelectricity data and cushion body pressure distribution data of the old in the STS movement process; The data analysis module is used for carrying out root mean square and median frequency analysis on the myoelectricity data, extracting a maximum pressure value, an average contact area and a maximum contact area from the body pressure distribution data, and carrying out correlation analysis and secondary linear regression analysis on the processed myoelectricity data and the body pressure distribution data; And the hardness generation module is used for generating the target hardness of the cushion material according to the analysis result.
10. A storage medium storing a computer program comprising computer program instructions which, when executed by a computer device, perform the optimization method of any one of claims 1-7.

Description

Method and system for optimizing hardness of seat cushion of old people Technical Field The invention belongs to the technical field of artificial intelligence, and particularly relates to a method and a system for optimizing hardness of a seat cushion of an old person. Background With the advent of the aging society, the self-care ability of the aged became an important factor for family happiness. It is known from literature studies that the self-care ability of the elderly is closely related to STS (sit-to-stand), which is not separable from the elderly's seat, and in the current study, the influence of the softness and hardness of the seat cushion on STS is rarely studied, and a great deal of study has been already conducted in the comfort study. With the increase of age, the physiological functions of people slowly decline, the functions of muscles, bones and limbs obviously decline, and especially the strength of lower limbs and joints obviously decline, and the sitting ability obviously declines. The reduced muscle strength of the lower limbs and the declined function of the lower limbs can seriously affect the sitting and standing conversion capability of the old. In daily life, the action from sitting on a chair to standing up is indispensable, and an average of 60 times per day is performed about 3 times per hour. Although the sitting and standing process is short, the sitting and standing process is an extremely important task, and the sitting and standing process is a self-care embodiment for the old. Secondly, the sitting and standing exercise can be used for lower limb rehabilitation training, can also evaluate the muscle strength of the lower limb and the degree of weakness of the lower limb, and is a highly reliable tool. Sit-to-stand conversion is a necessary condition to maintain independence in daily life. Such as eating, going to the toilet, dressing, walking and other daily actions. If the ability declines, the elderly may not be able to autonomously complete simple activities, relying on others to take care. The mobility of the old people is reduced due to the incapacitation of the old people, and the old people can not sit smoothly, so that the old people can reduce going out, social contact or participate in activities, and the physical function degradation is accelerated. The sitting-standing conversion problem of the aged is concerned to prevent falling and complications, and the aged with weak sitting-standing conversion ability is easy to lose balance when getting up or sitting down, so that falling is caused. It is counted that about 30% of the fall of the elderly over 65 years old occurs during sitting transitions, and falls are one of the main causes of fracture, disability and even death in the elderly. If the movement is reduced due to difficulty in sitting and standing, muscular atrophy, joint stiffness, pressure sores, deep vein thrombosis and other complications may occur. The sitting-standing conversion also reflects the overall health condition of the elderly. It is an index of muscular strength and coordination that sitting-standing conversion requires lower limb muscular strength (such as quadriceps femoris, gluteus), core stability and balance ability, and its decline often indicates sarcopenia, arthritis or neurological diseases (such as parkinson's disease). The number of times the "30 second sit-stand test" (30 SCHAIRSTANDTEST) was completed may indirectly reflect cardiopulmonary endurance, and a decrease in the number of times may indicate a decrease in cardiopulmonary function. Therefore, how to analyze the influence of the softness and hardness of the seat cushion on the STS of the elderly to optimize the seat cushion is a direction of urgent study. Disclosure of Invention The invention mainly aims to provide an optimization method and system for the hardness of an aged seat cushion, and aims to analyze the influence of the hardness of the seat cushion on the STS of the aged so as to optimize the seat cushion. In order to achieve the above purpose, the invention provides an optimization method of hardness of a seat cushion of an old person, comprising the following steps: Collecting lower limb myoelectricity data and cushion body pressure distribution data of the old in the STS exercise process; Performing root mean square and median frequency analysis on the myoelectric data; Extracting a maximum pressure value, an average contact area and a maximum contact area from the body pressure distribution data; Performing correlation analysis and secondary linear regression analysis on the processed myoelectricity data and body pressure distribution data; And selecting cushion materials with related hardness according to the analysis result, and designing the seat cushion for the old. Optionally, after the step of collecting the myoelectricity data of the lower limbs and the cushion body pressure distribution data of the old people in the STS exercise process, the ste