Pressure distribution of crown measuring instrument TYFB-A-Global supplier

1010, 10th Floor, Building 2, No.1 Courtyard, Liangshuihe Road, Chengnan Street, Changping District, Beijing

Seat body pressure distribution measurement system

(Seat cushion)+Cushion)

TYFB-A

technique

art

square

case

book

Beijing Guance Jingdian Instrument Equipment Co., Ltd

Guance Company has won unanimous recognition from a large number of users for its exquisite products, superb technology, excellent quality, and meticulous service.

Guance Company guarantees that all products supplied have undergone standardized production, strict testing, and inspection before leaving the factory, with good performance.

Looking forward to working with you, Shunsong Shangqi!

Guance Company independently develops sponge professional testing instruments for classification

Serial number	Equipment name	Equipment model	Test indicators	notes
1	Sponge indentation hardness testing machine	PMYX-2000A	Compression hardness value	Microcomputer control, supporting programmable experiments
2	Sponge fully automatic fixed load impact testing machine	PMPL-2000A	Fatigue resistance	Touch screen - automatic adjustment of force value
3	Sponge Automatic Ball Drop Rebound Tester	PMLQ-500	Resilience	Touch screen control- Support manual and electric ball release
4	Sponge density tester	PMMD-A	density	Digital direct reading
5	Slow rebound foam recovery time tester	PMFY-A	Recovery time	Touch Screen
6	Sponge compression deformation device	YSBX-1	deformation	Equipped with heating device
7	Sponge tensile tear strength testing machine	DLD-1KN	Stretching and tearing	Digital display, microcomputer
8	Sponge Foam Cutting Machine - Experimental Type	GCPQ-100	sampling	Cutting with knife, maximum cutting thickness 400mm
9	Sponge foam cutting table	PMQG-1	sampling	Electric wire cutting
10	Sponge compression stress-strain characteristic tester	PMYL-A	Compressive stress	Microcomputer control
11	Rigid foam plastics friability tester	PMYS-A	fragility	Touch Screen
12	Rigid foam plastic compression and shear strength tester	PMYJ-A	Compression and cutting	digital display
13	Rigid foam plastic water absorption tester	PMXS-A	Water absorption rate	digital display
14	Sponge air permeability tester	PMTQ-A	permeability	Touch Screen
15	Sponge energy impact testing machine	CLC-C	Impact energy and absorbed energy	Microcomputer control
16	Automobile seat body pressure distribution measurement system	TYFB-A	Pressure and body pressure distribution	Microcomputer control
17	Sofa/mattress body pressure distribution measurement system	TYFB-B	Pressure and body pressure distribution	Microcomputer control
18	Mobile body pressure distribution measurement demonstration system (Suitable for storefronts/used for demonstrations/promoting sales)	TYFB-C	Pressure and body pressure distribution	Microcomputer control
19	Combustion Characteristics Tester for Automotive Interior Materials	QCRS-I	Flame retardancy	Digital display type

Seat body pressure distribution measurement system (cushion)+Cushion)

TYFB-A

general outline Description:

Seat comfort is an important evaluation indicator for car seats, including static comfort and dynamic comfort. The so-called comfort refers to the subjective feeling of the human body, which is caused by both physiological and psychological factors.

Static comfort refers to the position, geometric shape, structural design, etc. of the seat that should enable the human body to have a verified sitting posture and good tactile sensation in a certain working environment.

Dynamic comfort requires the seat to still have a good static feeling while the driver completes the driving task.

The backrest angle of the car seat is 108°

The angle when reading is 101°--104°

The basic requirements for seat comfort can be listed as follows:

1. Minimize the fatigue level of drivers and passengers;

2. Can withstand significant pressure, safe and reliable;

3. Beautiful and elegant, with good thermal comfort, good moisture permeability, good breathability, and good tactile sensation;

4. Having good anthropometric characteristics, that is, adapting to drivers and passengers of different body shapes and sizes;

The pressure distribution between the human body and the seat is called the body pressure distribution in sitting posture. The distribution of body pressure in sitting posture is the main factor in evaluating comfort. From a physiological perspective, the muscles around the ischium of the human buttocks can withstand significant pressure, while the muscles below the thighs contain relatively large nerves and blood vessels, which cannot withstand prolonged pressure. Otherwise, discomfort such as paralysis and soreness may occur, which can affect nerve conduction.

The result of general theoretical analysis is that the reasonable distribution of sitting pressure in the human body is not uniform, but should gradually decrease smoothly from around the ischium to the edge.

When sitting, the weight of the thighs and upper body must be supported by the seat surface. According to anatomy, the human ischium is thick and robust, and can withstand greater pressure compared to the surrounding muscles. The bottom of the thigh has a large number of blood vessels and nervous systems, and excessive pressure can affect blood circulation and nerve conduction, leading to discomfort. So the pressure on the seat cushion should be designed according to the principle that different parts of the buttocks bear different pressures, that is, the pressure at the ischium is the highest, gradually decreases towards the periphery, and reaches a low value at the thigh. In order to reduce pressure on the lower part of the buttocks, a soft cushion should generally be designed on the seat surface, with a softness that allows the ischium to support about 60% of the weight of the human body. The backrest body pressure is mainly distributed at the scapula and lumbar vertebrae. The two support positions are usually referred to as "lumbar support" and "shoulder support". The position of the "lumbar support" is approximately between the 3rd and 4th nodes of the lumbar spine, and the position of the shoulder support is approximately between the 5th and 6th nodes of the thoracic spine. When designing the seat back, it is necessary to fully consider the "two-point support" effect of these two points. Among them, 'lumbar support' is more important than 'shoulder support'

1、 Product Usage:

Suitable for measuring seat body pressure distribution, used to display the body pressure distribution status and related parameters related to comfort

2、 Product composition:

1. Body pressure distribution software analysis system

2. Body pressure distribution measurement sensor

3. Body pressure distribution data acquisition system

3、 Measure sensor parameters:

1. Sensor size: 460 mm * 620 mm

2. Sensing area size: 400 mm * 400 mm

3. Number of sensing areas: 2288

4. Thickness: 0.2 mm

5. Pressure range: 100KG

6. Measurement accuracy: ± 10% FS before calibration, ± 5% FS after calibration

7. Working environment: Temperature range of -9 ℃ to 60 ℃

4、 Data collection system:

1. Working environment: Temperature range of -9 ℃ to 60 ℃.

2. The data collector is connected to a data processor (computer) through a USB interface.

3. The data collector is powered through a computer USB interface.

4. Sampling frequency 0-100Hz.

5、 Body pressure distribution software analysis system:

1. It has the function of real-time operation recording of the main parameters of the testing system (pressure, area, time).

2. Capable of displaying graphical or curved relationships between pressure and area, pressure and time.

3. Capable of recording dynamic changes in pressure, with a recording time of approximately 10 hours

4. It has the function of recording and rewinding observations, as well as measuring image display, and supports single or frame by frame animation playback analysis.

5. The stress test results can be exported in both image and Excel formats.

6. Capable of simultaneously measuring, observing, and comparing two or more measurement results, displaying the center of force and its movement trajectory.

7. Can independently reflect the pressure value and contact area of a specific area

8. ASCLL file output

9. Users can set their own numerical units

10. At the same time, 13 sets of data can be analyzed, providing a more comprehensive and three-dimensional analysis of seat body pressure distribution data

11. Index and characterization of body pressure distribution

Index and characterization of body pressure distribution

Serial number	Body pressure index	characterization
1	Maximum pressure Pm	The cushion is soft and hard, and the harder the cushion, the greater the Pm
2	Maximum pressure Pv	Characterize the stiffness and surface shape of the seat cushion
3	Maximum pressure gradient Gm	Reflect the stiffness and material distribution of the seat cushion
4	Average pressure gradient Gv	Reflect whether the distribution of cushion materials is reasonable and the magnitude of stiffness
5	Asymmetric coefficient Cu	Reflect whether the sitting posture is reasonable and the symmetry of the seat
6	Longitudinal pressure distribution curve PL	The pressure on the buttocks and legs, as well as the trend of pressure changes, comprehensively reflect the geometric and physical characteristics of the seat cushion stiffness, shape, and height above the ground
7	Longitudinal moment distribution curve	Reflect the ability of the seat to maintain human balance
8	Lateral stability coefficient S	The ability of the seat cushion to restore its balance position when tilting occurs
9	Static SPD%	Ability to characterize the distribution of body pressure generated by seat cushions
10	GC、GT	Characterization of pressure change rate in the ischial tuberosity area
11	Dynamic DSPD%	Characterize the ability of the seat cushion to maintain a uniform distribution of body pressure over a period of time
12	Pcrms	The ability of the seat cushion to alleviate vibration frequency under instantaneous obvious vibration
13	aPcrm	The ability of seat cushions to alleviate vibration under long-term vibration conditions

6、 Random configuration:

1. Thin film sensors: two sets

2. Software installation USB drive: one

3. Data collector: two sets per set

4. User manual: one set

Screenshot of data collection

2D display image

Three dimensional pressure distribution map

Screenshot of Fault Display

Physical picture (cushion+seat cushion)

Physical Image - Data Collector

Physical picture - packaging box