JPS60108033A - Walking route system for automatic measurement of foot bottom contact state and time factor due to switch system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes a switch method to determine the sole contact state during walking (three parameters: step length, lateral width, and toe opening angle) and its time factor (double-leg support period, left and right unilateral legs). The present invention relates to a walking path system that can automatically measure and record two types of parameters related to support time.

Some of the above five parameters related to the plantar contact state during walking or its time factor have conventionally been measured using footprints, pidoscopes, foot impression measuring devices, instrumented shoes, etc. These methods require manual intervention to collect and record data, making it difficult to analyze, evaluate, and evaluate gait in the areas of rehabilitation and orthopedics.
This caused a great deal of trouble in walking training.

In view of this current situation, the present invention provides a simple and highly practical walking path system that can automatically measure and record all of the above five types of parameters. A walking path system according to the present invention (hereinafter referred to as the present system) includes a walking path in which conducting wires are arranged in a grid, an electronic circuit device, a computer, and a program for calculating parameters. The configuration of this system will be described below with reference to FIGS. 1 to 5.

As shown in Figure 1, the walking path consists of (1) base plate (veneer board), (2) insole mat (5mm thick sponge).
, (3) Overlay sheet (1.5mm thick urethane rubber) 3
(2) Holes with a diameter of 5 mm are machined at 1 cm intervals vertically and horizontally in the (2) insole mat, and (4)
(5) Bare conductors (Single wire diameter 0.3 mm Suzumetsuki, 10 bundled wires) are arranged so as to be orthogonal to each other, (4
) (5) form a contact switch at the intersection. This walking path is formed of blocks of a predetermined length, and by arranging a plurality of blocks, the total length of the walking path can be extended as desired.

FIG. 2 shows the principle of detecting the point where the sole of the foot touches the ground using grid-like wiring within the walking road surface.

Now, Xm~Xn, Yj~Yk shown in Figure 2 (5)
If the switch in the black circle in the range is in the on state, (
1) When a 5V voltage is applied to the (2) contact by the changeover switch, only the terminal voltage between Yj and Yk becomes 5V, and the other Y terminal voltages become 0V.Similarly, when a 5V voltage is applied to the (3) contact, Only the voltage at the Xm to Xn terminals becomes 5V. Therefore, by switching the sweep direction of the multiplexer using (4) the switch synchronously with (1) the changeover switch, the on/off state of the switch at the relevant grid point can be detected.

Figure 3 shows the complete electronic circuit diagram of this system. In FIG. 3, block (1) surrounded by a dashed line shows a multiplexer driving section and a grid point switch signal detecting section, and block (2) shows a controller section. (2) The controller section further includes a demultiplexer circuit (3) surrounded by a broken line, an oscillation circuit and a frequency dividing circuit (4), and a waveform shaping flip-flop circuit (5). (6) The start switch starts the circuit device,
(7) A stop switch, which stops the circuit device, is placed at the end of the walking path. By the electronic circuit of FIG. 3, the switching period of switches (1) and (4) shown in FIG. 2 is set to 0.1 seconds. Note that in this system, the signal transmitted to the DI/DO port of the computer is called an address signal.

Based on the above address signal, five types of parameters including the sole contact state and the time factor are calculated by the program shown below. In Fig. 2, a foot shape like (6) is detected by the rectangular shape indicated by the black circle in (5), and the opposite foot is detected at the same time as the Xm line as shown in Fig. 2 (7). If you step on the button, the rectangle in (5) will be enlarged to the area shown by the white circle in (8) and detected. This system solves this problem using the following programming method.

In FIG. 4, F1 and Fv represent the sole length and width of the foot, respectively, and these values are measured in advance from a one-legged standing position on the walking road surface.

Here, for every 0.1 second switch switching cycle, D=(
Calculate W = (right end coordinate of X) - (left end coordinate of X), and satisfy the following conditions: D≦F1 and W≦2Fw (2) In some cases, it is determined to be in the single leg support phase. By counting the switch switching cycles when the condition of equation (2) is satisfied, the single leg support time is measured in units of 0.1 seconds. Further, the time for supporting both legs is increased by counting when the condition of equation (2) is not satisfied.

Note that the plantar contact during walking changes in states such as heel contact, return contact, and heel separation, and these fragmentary contact states are superimposed to form a foot print, so this system Now, as shown in Figure 5, all rectangles (1) to (5) detected every 0.1 seconds are superimposed (6
) and replace it with the footprint. From now on, the fifth
The computer calculates (7) stride length and (8) lateral width shown in the figure. As for the toe opening angle, as a result of basic experiments, F1, Fv in Figure 4, D■ in Figure 5,
Based on W■, θ=81.502tan-1{(W■-Wf
)/D■}+6.842 (3).

By implementing this system as described above, it has become possible to continuously and automatically measure the plantar contact state and its time factor, which was previously considered difficult. Furthermore, this system does not impose any additional restraints on the subjects, requires only a few operations from the experimenter, and can continue to collect data over the entire length of the walking path, so it is possible to repeat the walk several times. It has the advantage of being able to secure the necessary and sufficient amount of data.

This invention is original and has no examples in the prior art, and will greatly contribute to the fields of gait analysis, gait evaluation, and gait training.

[Brief explanation of drawings]

Figure 1 Structure of the walking path (1) Base plate (2) Insole mat (3) Overlay sheet (4) Bare conductor (5) Bare conductor Figure 2 Grid wiring diagram within the walking path (1) Changeover switch (2) Contact (3) Contact (4)
Multiplexer selector switch (5) Rectangular foot shape
(6) Actual foot shape (7) Opposite foot shape (8) Enlarged rectangular foot shape Figure 3 Electronic circuit diagram (1) Drive section and detection section (2) Controller section
(3) Demultiplexer section (4) Oscillation and frequency division circuit
(5) Flip-flop circuit for waveform shaping (6) Start switch (7) Switch switch Fig. 4 Sole contact sequence diagram Fig. 5 Explanatory diagram showing how to arrange footprint rectangles (1) to (5) Every 0.1 seconds (6) Footprint rectangle corresponding to the footprint (7)
Stride length (8) Lateral opening width “Patent applicant Shunji Hirokawa”

Claims (1)

[Claims] By arranging conductor wires in a grid pattern and forming switches at intersections, a walking path consisting of a switch matrix with 1 cm vertical and horizontal intervals was constructed, and after detecting the coordinates of the rectangular sole contact position by scanning the terminal voltage, Using a computer software program, all of the plantar contact conditions during walking (three types: stride length, lateral width, and toe opening angle) and their time factors (two types: double-leg support time, left and right single-leg support period) can be calculated. An automatic measurement system that enables simultaneous measurement and recording.