CN112729883A

CN112729883A - Dummy for testing sitting posture pressure comfort

Info

Publication number: CN112729883A
Application number: CN202011504310.9A
Authority: CN
Inventors: 呼慧敏; 梅志光; 冉令华; 张欣; 赵朝义; 罗玲; 王瑞; 吴海媚
Original assignee: China National Institute of Standardization
Current assignee: China National Institute of Standardization
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-30
Also published as: WO2022126911A1

Abstract

The invention provides a dummy for sitting posture pressure comfort test, which comprises: the head is fixedly connected with the trunk, the trunk is connected with the thighs through the hip joints, the thighs are connected with the calves through the knee joints, the big arm is connected with the trunk through the shoulder joints, and the big arm is connected with the small arm through the elbow joints; the head, the big arm, the small arm, the trunk, the thigh and the shank respectively comprise an epidermal layer, a supporting layer and an inner layer from outside to inside; the trunk and the thighs are respectively provided with a plurality of pressure sensors; the trunk is internally provided with a first gravity center adjusting mechanism; the head, the big arm, the small arm, the thigh and the shank are internally provided with a second gravity center adjusting mechanism. The dummy can be used as a standard test tool for comfort test of seating products, can calculate the structural dimension parameters and the human body posture parameters of the seat in a comfortable sitting posture, and can measure structural ergonomics and human-computer interaction pressure parameters such as the height, the depth, the hardness and the body pressure distribution of the seat surface in a comfortable sitting condition.

Description

Dummy for testing sitting posture pressure comfort

Technical Field

The invention belongs to the technical field of ergonomic experimental tests, and particularly relates to a dummy for testing sitting posture pressure comfort.

Background

In ergonomic testing experiments or studies, a large number of human experiments are usually required, and it is not desirable to directly test with real persons for health and safety reasons. The dummy is used for carrying out the ergonomic test, so that the influence of individual difference on an experimental result can be eliminated, the problems of repeated selection of experimenters and the like can be effectively solved, the experimental period is shortened, the experimental cost is reduced, and the dummy has high accuracy and good repeatability. However, at present, no high-simulation physical structure model which meets the Chinese adult human body physical sign size, weight data, mass distribution and body surface skin deformation exists in the domestic market. There is a need for a device that has physical, mass, and mechanical characteristics of a real person and is capable of performing body pressure distribution tests in a sitting position.

With the development of technology and the improvement of living standard of people, people put forward higher requirements on humanized design and comfortable experience of products. Particularly, for seating furniture products closely related to work and life of people, people have more and more demands on sitting pressure comfort such as the influence on support, touch pressure feeling and fitting performance, how to scientifically, standardly and effectively evaluate the pressure comfort, and enable evaluation results to have better consistency and reproducibility are always key technical bottleneck problems of the pressure comfort evaluation of seating furniture and related support products, and the main reason of the problem is that objective, accurate and consistent pressure load cannot be realized. Because the human body is a complex physiological system, the sitting posture pressure comfort result depends on the degree of the load in the pressure test, the physiological structure of the human body, the mass distribution characteristics of the human body, the posture of the human body, the skin compression deformation and the like, which are consistent with the real human body.

At present, because no human body dummy model for sitting posture pressure comfort evaluation exists in China, real person test is often adopted in related fields during evaluation, and because of large individual difference among real persons, all organizations cannot load people uniformly during detection, the evaluation results of all organizations have large difference in the same product. Some related mechanisms adopt a pressure weight form, but because the pressure weight can not simulate the physiological structure, the mass distribution and the posture condition of a real person, the test result has larger difference with the result in actual use.

The size, structure, characteristics, working principle and the like of the dummy for different purposes are very different. Thermal environment test dummy developed and produced in large quantities at home and abroad meets the geometric characteristics of human body, mechanical characteristics are not considered, and collision dummy needs to meet the geometric characteristics of human body, corresponding biomechanics and other characteristics. The garment pressure comfort test dummy mainly needs to meet the corresponding human body geometric characteristics, skin characteristics and the like. For a sitting posture pressure comfort test dummy, the geometrical characteristics, the mass center characteristics, the skin mechanical characteristics and the like of corresponding people need to be met, and a large amount of development and production of related products are not seen at home and abroad at present. Therefore, there is a need to develop a manikin for evaluating the stress comfort, which provides a standard and accurate standard stress load for the science, justice and consistency of the evaluation result of the sitting stress comfort.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a high-simulation physical structure model which can meet the size and weight data of body signs of adults in China for comfort test, and aims to provide a dummy for sitting posture pressure comfort test.

In order to achieve the above purpose, the invention adopts the following technical scheme.

A dummy for sitting compression comfort testing, comprising:

the head is fixedly connected with the trunk, the trunk is connected with the thighs through the hip joints, the thighs are connected with the calves through the knee joints, the big arm is connected with the trunk through the shoulder joints, and the big arm is connected with the small arm through the elbow joints;

the head, the big arm, the small arm, the trunk, the thigh and the shank respectively comprise an epidermal layer, a supporting layer and an inner layer from outside to inside;

the trunk and the thighs are respectively provided with a plurality of pressure sensors;

the trunk is internally provided with a first gravity center adjusting mechanism;

the head, the big arm, the small arm, the thigh and the shank are internally provided with a second gravity center adjusting mechanism.

Preferably, the skin layer is a silica gel layer; the supporting layer is a glass fiber reinforced plastic layer;

the inner layer is a connecting layer and provides support for the gravity center adjusting mechanism and the joint connection.

Preferably, the hip, knee, shoulder and elbow joints comprise:

the joint comprises a joint shaft, a shaft sleeve, a partition plate, a locking nut and a friction plate;

the joint shaft and the shaft sleeve are respectively connected with the connected limbs through bolts; the clapboard is an annular rigid part and is arranged between the connected limbs for adjusting the assembly gap; the friction plate provides rotary damping for the joint to ensure that the connected limbs can keep the adjusted position; the locking nut is matched with the joint shaft through threads.

Preferably, the pressure sensors are flexible thin-sheet type pressure sensors, and comprise two polyester films, and conductors and semiconductors are laid on the inner surfaces of the two polyester films.

Preferably, the plurality of pressure sensors are arranged in an array.

Preferably, a memory sponge and a contact block are arranged below the epidermis layers of the trunk and the thighs, a pressure sensor groove is formed in the memory sponge, the pressure sensor is arranged in the pressure sensor groove, and the contact block is located in the adjacent area of the pressure sensor groove, so that a certain gap is kept between the contact block and the pressure sensor when the thighs are not pressed.

Preferably, memory sponges are arranged under the epidermis layers of the trunk and the thighs, and the sensor supports are embedded in the memory sponges;

each of the plurality of pressure sensors is mounted in a sensor mount.

Preferably, the first gravity center adjusting mechanism comprises a transverse lead screw and a longitudinal lead screw which are vertically arranged; the transverse screw rod and the longitudinal screw rod are respectively provided with a balancing weight in a penetrating way.

Preferably, the first gravity center adjusting mechanism comprises a Z-direction gravity center adjusting mechanism, a Y-direction gravity center adjusting mechanism and an X-direction gravity center adjusting mechanism; the X direction, the Y direction and the Z direction are mutually vertical;

the Z-direction gravity center adjusting mechanism consists of a Z-direction guide rod, a gear shaft and a Z-direction balancing weight; one end of the Z-direction guide rod is provided with a thread and is connected with the trunk, and the two ends of the gear shaft are connected with the trunk; the end of the Z-direction balancing weight is provided with teeth meshed with the gear shaft, and the inside of the Z-direction balancing weight is provided with a light hole for the Z-direction guide rod 31 to pass through;

the X-direction gravity center adjusting mechanism consists of an X-direction balancing weight, an X-direction guide rod and an X-direction screw rod; a hole for the X guide rod to pass through and a threaded hole matched with the X-direction screw rod are formed in the X-direction balancing weight; the X-direction guide rod and the X-direction screw rod are respectively connected with the trunk;

the Y-direction gravity center adjusting mechanism consists of a Y-direction guide rod, a Y-direction screw rod and a Y-direction balancing weight; a hole for the Y guide rod to pass through and a threaded hole matched with the Y-direction screw rod are formed in the Y-direction balancing weight; the Y-direction guide rod and the Y-direction screw rod are respectively connected with the trunk.

Preferably, the second gravity center adjusting mechanism comprises a balancing weight and a sliding rod; the lead screw is provided with a balancing weight in a penetrating way.

Compared with the prior art, the invention has the following beneficial effects:

the density, the appearance characteristic and the mass distribution characteristic of the dummy provided by the invention conform to the appearance characteristic and the physical size data of a human body of a Chinese adult male P50, the moving joint can adjust the sitting posture and the lying posture, the dummy has a humanized shape and biomechanical response similar to a human body in the aspect of pressure comfort test, a gravity center adjusting mechanism is arranged in the dummy, the dummy can be matched with the gravity center position of a real human body, and the contact surface can be reasonably deformed; and the center of gravity can be adjusted outside the dummy, and the problem that the center of gravity is inconvenient to adjust after the dummy is assembled is solved. The error ranges of the body pressure distribution result and the body pressure distribution result (human-computer interaction pressure contact area, peak pressure, average pressure and pressure gradient) tested by a real person are controlled within 10 percent. Meanwhile, according to the comfort evaluation model provided by the invention, based on the test result, the evaluation result of the pressure comfort can be directly given. The dummy can be used as a standard test tool for comfort test of seating products such as seats at home and abroad, and has the functions of measuring the typical position height and other dimensions, and storing and displaying the test result.

Drawings

FIG. 1 is a schematic view of a dummy assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of a connection between a head and a trunk of a dummy according to an embodiment of the present invention;

FIG. 3 is a schematic view of a connection between a trunk and a thigh according to an embodiment of the present invention;

FIG. 4 is a schematic view of a connection between a thigh and a shank according to an embodiment of the present invention;

FIG. 5 is a schematic view of the connection between the trunk and the large arms according to the embodiment of the present invention;

FIG. 6 is a schematic view of a connection between a large arm and a small arm according to an embodiment of the present invention;

FIG. 7 is a schematic view of a joint structure according to an embodiment of the present invention;

FIG. 8 is a schematic view of an internal center of gravity adjustment mechanism according to an embodiment of the present invention;

FIG. 9 is a schematic view of a three-dimensional center of gravity adjustment mechanism according to an embodiment of the present invention;

FIG. 10 is a schematic view of an adjustment mode of a three-dimensional center of gravity adjustment mechanism according to an embodiment of the present invention;

FIG. 11 is a partial schematic view of a three-dimensional center of gravity adjustment mechanism according to an embodiment of the present invention;

FIG. 12 is a schematic illustration of an assembly for a dummy according to an embodiment of the present invention;

FIG. 13 is a schematic view of a skin structure according to an embodiment of the present invention;

FIG. 14 is a diagram of a pressure sensor arrangement according to an embodiment of the present invention;

FIG. 15 is a cross-sectional block diagram of two alternative pressure sensors according to embodiments of the present invention;

fig. 16 is a schematic view of a height dimension measurement of an exemplary position according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

The main parts assembly diagram of the dummy for the sitting position pressure comfort test is shown in figure 1. Mainly comprises a head 1, a big arm 2, a small arm 3, a trunk 4, thighs 5, crus 6, joints and the like. The joints comprise hip joints, knee joints, shoulder joints and elbow joints; the head 1, upper arm 2, lower arm 3, torso 4, thighs 5, lower legs 6 are also referred to hereinafter collectively as limbs.

As shown in fig. 2, the head 1 and the trunk 4 of the dummy are connected by screws.

In an alternative embodiment, the head and the trunk of the dummy can be connected by a lock.

Trunk and thigh connections are shown in fig. 3: the trunk is connected to the thighs via the hip joints.

The thigh to calf connection is shown in fig. 4: the thigh is connected with the shank through the knee joint.

The trunk is connected with the big arm as shown in fig. 5: the big arm is connected with the trunk through a shoulder joint.

The connection of the big arm and the small arm is shown in figure 6: the big arm is connected with the small arm through an elbow joint.

The hip joint, knee joint, shoulder joint, elbow joint and other joints are all designed in the same structure as shown in fig. 7, and comprise: the joint shaft 21, the shaft sleeve 22, the partition plate 23, the lock nut 24, and the friction plate 25 are used to connect the first connected member 26 and the second connected member 27.

The joint shaft 21 and the shaft sleeve 22 are respectively connected with the first connected piece 26 and the second connected piece 27 through bolts, the friction plates provide damping for the joint, and the size of the damping can be adjusted by adjusting the locking nut.

The joint shaft 21 and the shaft sleeve 22 are respectively connected with a first connected piece 26 and a second connected piece 27 (namely connected limbs) at the joint through screws; the distance between the connected pieces (limbs) is adjusted through the partition 23; the spacer 23 is a ring-shaped rigid member, and is installed between the first attached member 26 and the second attached member 27 (i.e., between the attached limbs) to adjust the fitting gap. The friction plate 25 joint provides rotational damping to ensure that the attached limb can maintain an adjusted position. The nut 24 is matched with the joint shaft 21 through threads, the friction plate 25 can be compressed after being screwed, the damping size can be adjusted according to the screwing degree of the nut 24, and meanwhile, the nut is provided with a small step for limiting the shaft sleeve 22 to ensure that limbs connected with the shaft sleeve 22 are not separated from limbs connected with the joint shaft 21.

When the joint structure is particularly applied to hip joints, knee joints, shoulder joints and elbow joints, the first connected piece and the second connected piece are respectively the installation and connection parts of a trunk and thighs, thighs and calves, the trunk and a big arm. Particularly, the installation linking positions of the trunk and the thighs, the thighs and the shanks, the trunk and the big arms, and the big arms and the small arms are set to be mutually attached shapes, so that the corresponding joints can be conveniently installed.

The internal center of gravity adjusting mechanism 7 is shown in fig. 8. The gravity center adjusting mechanism 7 is designed for each part of the dummy to finely adjust the gravity center, so that the gravity center and the quality of the human body are the same as those of a real person.

In an alternative embodiment, the center of gravity adjusting mechanism installed inside the trunk 4 may be of a modular structure, including a T-shaped frame made of aluminum alloy material, and a transverse screw and a longitudinal screw fixedly installed on the frame and installed perpendicular to each other; the transverse screw rod and the longitudinal screw rod are respectively provided with a sliding block in a penetrating way and are used as balancing weights. The transverse lead screw and the longitudinal lead screw are rotated to drive the sliding block to realize displacement, so that the gravity center of the dummy or the dummy part is adjusted. The gravity center adjusting mechanism arranged on other parts except the trunk such as the head 1, the big arm 2, the small arm 3, the thigh 5, the shank 6 and the like can be composed of only a lead screw and a slide block, and the slide block is driven to move by rotating the lead screw, so that the gravity center adjustment in one direction is realized.

As a further preferred embodiment, the rotation of the transverse lead screw and/or the longitudinal lead screw is driven and controlled by an optional stepping motor, so that the position of the slide block can be accurately controlled, and the accurate adjustment of the gravity center is further realized. The necessary motor control circuit and power module belong to the prior art and are not described in detail.

In another alternative embodiment, the gravity center adjusting mechanism is provided with a three-dimensional gravity center adjusting mechanism so as to adjust the gravity center of the dummy in the three directions of XYZ, and the structure is as shown in fig. 9, and comprises a Z-direction gravity center adjusting mechanism, a Y-direction gravity center adjusting mechanism and an X-direction gravity center adjusting mechanism; the X direction, the Y direction and the Z direction are mutually vertical.

The Z-direction gravity center adjusting mechanism is composed of a Z-direction guide rod 31, a gear shaft 32 and a Z-direction balancing weight 33. The connection mode is as follows: one end of the Z-guide 31 is threaded to engage with a threaded hole in the inner frame. The gear shaft 32 is connected at both ends to the trunk support layer. The Z-direction weight 33 has teeth at its end and meshes with the gear shaft 32, and has a light hole inside for the Z-direction guide rod 31 to pass through.

And the Z-direction counterweight block is adjusted through the Z-direction guide rod, the gear shaft and the Z-direction counterweight block in the Z direction. The hexagonal groove in opening at the tip of gear shaft, the position that trunk one side, alignment gear shaft 32 opened hexagonal groove one end is opened there is the through-hole to use allen key 40 externally to rotate, drive Z simultaneously and reciprocate to the balancing weight, realize that the focus adjusts from top to bottom (Z direction promptly).

The X-direction gravity center adjusting mechanism is composed of an X-direction weight 34, an X-direction guide rod 35, and an X-direction lead screw 36. Two holes are formed in the X-direction balancing weight 34, one hole is a unthreaded hole for the X guide rod 35 to penetrate through, and the other hole is a threaded hole matched with the X-direction screw rod 36. The X-direction guide rod 35 and the X-direction screw rod 36 are respectively connected with the trunk supporting layer.

The X-direction balancing weight, the X-direction guide rod and the X-direction screw rod are used for adjusting in the X direction. An inner hexagonal groove is formed in the end portion of the X-shaped screw rod, a through hole is formed in the position, aligned with the hexagonal groove, of the trunk, so that the trunk can rotate outside through an inner hexagonal wrench, meanwhile, the balancing weight is in threaded fit with the screw rod, the screw rod rotates to drive the balancing weight to move in the X direction, and the gravity center left-right adjusting effect is achieved.

The Y-direction gravity center adjusting mechanism consists of a Y-direction guide rod 37, a Y-direction screw rod 38 and a Y-direction balancing weight 39. Two holes are formed in the Y-direction balancing weight 39, one hole is a smooth hole for the Y guide rod 37 to penetrate through, and the other hole is a threaded hole matched with the Y-direction screw rod 38. The Y-direction guide rod 37 and the Y-direction screw rod 38 are respectively connected with the trunk supporting layer.

And the Y-direction counterweight block is adjusted through a Y-direction guide rod, a Y-direction screw rod and the Y-direction counterweight block in the Y direction. An inner hexagonal groove is formed in the end portion of the Y-shaped screw rod, a through hole is formed in the position, aligned with the hexagonal groove, of the trunk, so that the trunk can rotate outside through an inner hexagonal wrench, meanwhile, the balancing weight is in threaded fit with the screw rod, the screw rod rotates to drive the balancing weight to move in the Y direction, and the gravity center front-back adjusting effect is achieved.

The adjustment mode is as shown in fig. 10, when X is adjusted to focus adjustment mechanism, through inserting spanner 40 inside the truck, open the through-hole that corresponds on the truck, X is to opening interior hexagonal groove at lead screw both ends, there is interior hexagonal boss on the spanner, X is to balancing weight and lead screw threaded connection, spanner and X are to the lead screw cooperation back, the spanner drives the lead screw clockwise or anticlockwise rotation, adjust about the balancing weight, X has the mating holes to the balancing weight on to, can guarantee balancing weight directional motion and do not take place the rotation.

Y is when adjusting to focus adjustment mechanism, through inserting spanner 40 inside the truck, open the through-hole that corresponds on the truck, Y is opened interior hexagonal groove to the lead screw both ends, has interior hexagonal boss on the spanner, Y is to balancing weight and lead screw threaded connection, spanner and Y are to the lead screw cooperation back, and the spanner drives the lead screw clockwise or anticlockwise rotation, adjusts and controls about the balancing weight, and Y has the mating holes to the balancing weight on to, can guarantee balancing weight directional motion and do not take place the rotation.

When the Z-direction gravity center adjusting mechanism is adjusted, the two end parts of the gear shaft are provided with inner hexagonal grooves, and the wrench 40 is matched with the gear shaft to drive the gear shaft to rotate clockwise or anticlockwise, so that the structure is shown in fig. 11. The Z-direction balancing weight end is provided with end face teeth matched with the gear shaft, the balancing weight is provided with a guide hole matched with the guide rod, and the rotation of the gear shaft drives the Z-direction balancing weight to move up and down along the Z-direction guide rod, so that the purpose of adjusting the gravity center to move up and down is achieved.

Due to the design process of the dummy, other limbs except the trunk are provided with the unidirectional gravity center adjusting mechanisms, and the XYZ gravity center adjusting mechanism in the trunk plays a role in correcting the total gravity center of the body.

Damping supporting seats 41 are arranged at two ends of the screw rod and two ends of the gear shaft, so that the screw rod and the gear shaft can be fixed, the screw rod and the gear shaft can not rotate after being adjusted by a wrench, and the gravity center position after being adjusted is fixed.

The dummy assembly effect for achieving the external center of gravity adjusting function is shown in fig. 12.

The skin structure is shown in fig. 13 and is divided into three layers, and the epidermal layer 8 is a silica gel layer and can be reasonably deformed according to the design of human skin; the supporting layer 9 is a glass fiber reinforced plastic layer, has small density and high strength and plays a supporting role; the inner layer 10 is a connecting layer that provides support for the center of gravity adjustment mechanism and articulation. The human skin is composed of epidermis and dermis, and because the dermis contains a large amount of elastic fibers and collagen fibers, the skin has certain elasticity and toughness, and the epidermis layer of the skin structure has similar elasticity and toughness.

In an alternative embodiment, the sensors may be placed in the thigh and torso part areas, as shown in fig. 14. The sensor matrix is arranged in a deformation area to ensure pressure measurement in the area. In this embodiment, the sensor is a single-point flexible sheet type pressure sensor. The flexible film type pressure sensor consists of two very thin polyester films, and conductors and semiconductors are laid on the inner surfaces of the two thin polyester films. When external force acts on the sensing point, the resistance value of the sensing point can be changed regularly along with the external force, when the pressure is zero, the resistance value is the largest, and the larger the pressure is, the smaller the resistance value is. By placing different densities of sensor points in different places, different spatial resolutions can be achieved. Different sensor areas and spatial resolutions can meet various measurement requirements. The layout area and arrangement of the sensors can also be determined according to the requirements of ergonomic testing, for example, the density of the sensors arranged on the back and the thighs of the trunk is different, so that the density of the sensors on the back of the trunk is higher, and therefore, the spatial resolution is sufficient when back pressure data of different angles are acquired in the process of completing the pressure test of the seat back.

In an alternative embodiment, a cross-sectional view of the pressure sensor is shown in FIG. 15A. The pressure sensor comprises a pressure sensor groove 11, a memory sponge 12, a contact block 13 and a flexible pressure sensor 14. A pressure sensor groove 11 is formed in the memory sponge 12, the flexible pressure sensor 14 is installed in the pressure sensor groove 11, and a contact block 13 is installed in the area adjacent to the pressure sensor groove 11, so that a certain gap is kept between the contact block 13 and the flexible pressure sensor 14 in a natural state when the contact block is not pressed. When the external skin of the dummy is stressed, the simulation skin and the memory sponge deform and drive the pressure sensor to move; when the contact block 13 is touched, the pressure sensor is pressed to generate a signal because the contact block 13 is stationary.

In another alternative embodiment, a cross-sectional view of the pressure sensor is shown in FIG. 15B. A sensor holder 18 is embedded in the memory sponge 12 below the epidermis layer 8 of the simulated skin, and the flexible pressure sensor 14 is installed in the sensor holder 18. When the external skin of the dummy is stressed, the simulated skin and the memory sponge deform, and the thin film sensor in the sensor bracket generates a signal after being extruded. The position of a measured point can be effectively controlled through the sensor bracket, and the pressure points are guaranteed to be uniformly distributed.

In another alternative embodiment, the pressure sensor may be embedded inside the epidermis layer of the simulated skin. In the installation mode, the sensor layer is embedded in the epidermal layer and adopts a three-layer structure of 'laminated film-flexible pressure sensor-plastic film', so that the density of the sensor array can be increased, and the skin compression state can be reflected more truly. In this configuration, a metal strain gauge may also be used instead of the flexible pressure sensor to simplify the structure.

Typical position height dimension measurements are shown below in fig. 16. In the using process of the dummy, the equidistant ground distance of the seat is measured, the laser ranging probe is independently arranged on the seat outside to measure the height, and the data is transmitted to the computer. In order to solve the problem of installation positions, the installation tool can be designed according to different requirements, and the equipment is guaranteed to be used quickly and conveniently.

The operator twists each joint, thereby makes the dummy adjust the gesture, and the joint has certain damping, can make the gesture keep, and each joint has the nut of adjusting the damping size simultaneously, makes the regulation more convenient.

The invention can provide comfort related detection data, judge the comfort of the environment and ensure the accuracy of the measurement data by adopting a high-simulation physical structure model designed according to the size and weight data of the body signs of the Chinese adults.

The invention has simple structure, convenient operation and safe use, can add different sensors for later period and can simulate more complete data parameters.

Example two

The test procedure was as follows:

1) the dummy is taken out of the storage box and placed on the soft pad, so that the silica gel skin is prevented from being scratched by a sharp object.

2) The joint nut is adjusted to enable all parts of the body to rotate and keep as far as possible, and the nut is not suitable for being tightened.

3) The mounting part is placed, the posture of the dummy is adjusted and finely adjusted, and the tightness degree of the nut is adjusted according to requirements.

4) Ergonomics tests were performed with a dummy. And adjusting the height displacement of the seat surface of the seat, and testing the height body pressure of the seat surface. And adjusting the depth of the seat surface of the seat, and carrying out depth body pressure test. And adjusting the hardness of the seat, and testing the seat surface hardness and hardness body pressure. And adjusting the hardness and the angle of the backrest to perform backrest body pressure test. After the power supply is turned on and is kept still for 5 minutes, pressure test data acquisition is carried out, and real-time data or average data in a certain period of time can be acquired. And automatically storing after the acquisition is finished.

5) After the experiment is finished, each joint of the dummy is reset, and the adjusting nut is screwed down. Wiping the dummy skin with sterilized alcohol, and packaging.

The dummy provided by the invention is equipment which has the appearance characteristics, the mass distribution characteristics and the mechanical characteristics of a real person and can perform body pressure distribution test in a sitting posture. To judge within what index range a more comfortable feeling can be obtained, thereby obtaining the most suitable data range. The experimental test method is scientific, reasonable and effective, and provides a certain scientific basis for sitting posture comfort evaluation. The dummy provided by the invention can be used as a standard test tool for comfort test of seating products such as seats and the like, and has the function of measuring the typical position height and other dimensions. The method can calculate the structural size parameters and the human body posture parameters of the seat in a comfortable sitting posture, and can measure the structural ergonomics parameters such as the height, the depth, the hardness and the like of the seat surface in the comfortable sitting posture. The most comfortable seat surface height and hardness can be measured by matching different seat surface heights, depths and hardness in combination with a pressure distribution measuring system. And obtaining an ergonomic design parameter standard through the height data and the deformation degree displayed by the dummy.

Claims

1. A dummy for sitting compression comfort testing, comprising: head, big arm, forearm, truck, thigh, shank, hip joint, knee joint, shoulder joint and elbow joint, head and truck link firmly, and the truck passes through hip joint and links to each other with the thigh, and the thigh passes through the knee joint and links to each other with the shank, and big arm passes through the shoulder joint to be connected with the truck, and big arm passes through elbow joint and is connected its characterized in that with the forearm:

2. The dummy of claim 1, wherein:

the surface layer is a silica gel layer; the supporting layer is a glass fiber reinforced plastic layer;

3. The dummy of claim 1, wherein:

the hip joint, knee joint, shoulder joint and elbow joint include:

4. The dummy of claim 1, wherein:

the pressure sensors are flexible sheet type pressure sensors and comprise two polyester films, and conductors and semiconductors are laid on the inner surfaces of the two polyester films.

5. The dummy of claim 4, wherein:

the pressure sensors are arranged in an array.

6. The dummy of claim 1, wherein:

set up memory sponge and contact piece under the epidermis layer of truck and thigh, be provided with the pressure sensor groove in the memory sponge, pressure sensor installs in the pressure sensor groove, and the contact piece is located the neighborhood in pressure sensor groove, makes contact piece and pressure sensor keep certain clearance when the thigh is not compressed.

7. The dummy of claim 1, wherein:

memory sponges are arranged under the epidermis layers of the trunk and the thighs, and sensor supports are embedded in the memory sponges;

each of the plurality of pressure sensors is mounted in a sensor mount.

8. The dummy of claim 1, wherein:

the first gravity center adjusting mechanism comprises a transverse screw rod and a longitudinal screw rod which are vertically arranged; the transverse screw rod and the longitudinal screw rod are respectively provided with a balancing weight in a penetrating way.

9. The dummy of claim 1, wherein:

the first gravity center adjusting mechanism comprises a Z-direction gravity center adjusting mechanism, a Y-direction gravity center adjusting mechanism and an X-direction gravity center adjusting mechanism; the X direction, the Y direction and the Z direction are mutually vertical;

the Z-direction gravity center adjusting mechanism consists of a Z-direction guide rod, a gear shaft and a Z-direction balancing weight; one end of the Z-direction guide rod is provided with a thread and is connected with the trunk, and the two ends of the gear shaft are connected with the trunk; the end part of the Z-direction balancing weight is provided with teeth meshed with the gear shaft, and the inside of the Z-direction balancing weight is provided with a unthreaded hole for the Z-direction guide rod to pass through;

10. The dummy of claim 1, wherein:

the second gravity center adjusting mechanism comprises a balancing weight and a sliding rod; the lead screw is provided with a balancing weight in a penetrating way.