A plantar force measurement device for lower limb power assist system

Abstract

The invention belongs to the technical field of machines, and provides a foot applied force measuring device for a lower limb assistance system, wherein the foot applied force measuring device is convenient to wear, does not impede normal walking and running of a user, and protects the joints of the users against injuries. According to the foot physiological structure of a human body, the freedom degree of the joints is similar to that of the joints of the feet of the human body, and the foot applied force measuring device can be in fit with movements of the human body. According to the foot applied force distribution, pressure sensors are distributed, and force transmission structures are arranged. The sensors convert pressure signals into electric signals, the electric signals are transmitted to a signal processing system through a cable, and gait information is obtained through calculation, and sent to the outer world through a bus. Therefore, the foot applied force measuring device has the better man-machine suitability, meets the requirement of the lower limb assistance system and a similar system for foot applied force measuring analysis and load bearing, integrates gait analysis functions, does not influence the gait movements of the user, protects the user against injuries of deformation movements, and is accurate in force measurement, reliable in bearing, and wide in application prospect in similar assistance systems.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a plantar force measuring device used in a lower limb assisting system. Background technique [0002] In equipment such as exoskeleton and rehabilitation training equipment for the disabled, it is necessary to monitor the force on the sole of the user. The existing plantar measurement system lacks the optimal design of sensor devices and mechanical structures, poor wearing comfort, loss of force measurement, and lack of protection; the sensing device itself does not have signal analysis and processing capabilities and communication functions. [0003] Such as figure 1 with figure 2 As shown, the characteristics of the existing two plantar force measuring devices are that the pressure sensor is directly exposed, and the user directly steps on it, which causes the contact area between the sensor and the user's sole to be too small, resulting in poor comfort for the...

AI Technical Summary

Problems solved by technology

The existing plantar measurement system lacks the optimal design of sensor devices and mechanical structures, poor wearing comfort, loss of force measurement, and lack of protection; the sensor device itself does not have signal analysis and processing capabilities and communication functions

[0003] like figure 1 and figure 2 As shown, the characteristics of the existing two plantar force measuring devices are that the pressure sensor is directly exposed, and the user directly steps on it, which causes the contact area between the sensor and the user's sole to be too small, resulting in poor comfort for the user; A part of the user's sole will be in contact with the bottom surface of the shoe body except the upper surface of the sensor, which will cause the loss of force measurement and easily cause damage to the force sensor

[0004] Existing plantar force measuring devices are divided into two parts, the front part of the sole and the middle rear part. figure 1 The plantar force measuring device shown is connected by flexible materials, figure 2 The plantar force measuring device shown is connected by a pin shaft, and the front and rear parts can rotate freely. During the movement of the wearer carrying heavy objects, there is a risk of damage to the plantar joints of the human body due to the large range of motion; and only the signals are tested. No collection and preliminary processing, no analysis of gait and other information, no communication function

figure 2 The plantar force measuring device is shown without the ankle joint and force-measuring structure; figure 1 The force transmission structure of the ankle joint of the plantar force measurement device does not take into account the degree of freedom of the ankle joint, which affects the wearing comfort

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