For the development of biped robot and artificial limb as well as for the rehabilitation of patients whose legs are injured or have difficulty in movement, a gait phase online identification and calculation of centre of pressure (CoP) system is researched. In previous researches, the force sensitive resistors were fit inside of the shoes, which were called sole sensors. However according to our own experiments, this is not effective method for the identification of the gait phase because there is a relative movement between the foot and shoe if the shoes aren't adequately adapted to the feet. In our research the force sensors are installed on exsole instead of on the insole, which cause the readings to accurately correspond with the physical information of human. 4 pieces of force sensitive resistors, one piece of position sensor and a fibre sensor that is for the measuring of the bend of the legs are used. The 5 normal gait phases such as stance, stance-kneebend, heel-off, swing-bend, swing-extend heel-strike and 4 irregularities such as stance-external-tip over, stance-internal-tip over, forward tipping over, etc. can be identified with a combination's of sensors. CoP can be also calculated in real-time. The identification is independent from the order of the walking. The reliability of the results is 100% attainable. The first gait phase is also identifiable. Additionally, whether human walks fast or quite slowly doesn't influence to the identification result. The system self-calibration is carried out at the beginning of running. It is therefore ensured that the system measurement is 100% identical in relation to the walking of people
[1]
R. Marcus,et al.
Mechanobiology of femoral neck structure during adolescence.
,
2000,
Journal of rehabilitation research and development.
[2]
D S Childress,et al.
Two-dimensional representation of three-dimensional pelvic motion during human walking: an example of how projections can be misleading.
,
1996,
Journal of biomechanics.
[3]
S. Delp,et al.
The influence of muscles on knee flexion during the swing phase of gait.
,
1996,
Journal of biomechanics.
[4]
S. Gard,et al.
The influence of stance-phase knee flexion on the vertical displacement of the trunk during normal walking.
,
1999,
Archives of physical medicine and rehabilitation.
[5]
I P Pappas,et al.
Stability criterion for controlling standing in able-bodied subjects.
,
2000,
Journal of biomechanics.
[6]
M.R. Popovic,et al.
A reliable gait phase detection system
,
2001,
IEEE Transactions on Neural Systems and Rehabilitation Engineering.
[7]
Manfred Morari,et al.
Grasping and walking neuroprostheses for stroke and spinal cord injured subjects
,
1999,
Proceedings of the 1999 American Control Conference (Cat. No. 99CH36251).