SU1472828A1 - Method of determining optimum inner shape footwear - Google Patents

Abstract

The invention relates to light industry and can be used to design a rational inner shape of a shoe, in particular, a rational bottom of a shoe. The purpose of the invention is to improve the accuracy of determination by creating conditions for pressure equalization with respect to the trace of a shoe. This goal is achieved in that, according to the method for determining the inner shape of the shoe, which consists in placing sensors in the bottom parts of the shoe, the sensors position the pressure changes around the perimeters of the cross-sections of the pressure block and in the areas of greatest intensity. displacements (pressures) of the foot during loading and according to the obtained values, adjust the inner shape of the shoe / footprint /, and the sensors are placed in the openings of the main insoles and shoe soles provided that the measuring surface of the sensors and the inner surface of the main insole match. The placement of the sensors is also carried out according to a theoretical optimal pattern or computer. 3 il.

Description

The invention relates to light industry and can be used in the design of a rational inner shape of a shoe, in particular a rational bottom of a shoe.

The purpose of the invention is to improve the accuracy and expand the measurement range by determining the vertical movement of the foot during loading.

This goal is achieved by the method of determining the inner shape of the shoe, which consists in determining the nature of the change in the pressure of the foot on the support, on which the areas of the greatest intensity of change in pressure are found,

the change is carried out additionally at the points of the greatest intensity of pressure changes, and the adjustment of the inner shape of the shoe is carried out by profiling the insole in accordance with the pressure value to equalize it.

FIG. Figure 1 shows a scheme for obtaining optimal measurement points (sensor placement); in fig. 2 shows the layout of sensors and a single measuring cell; in FIG. 3. Calibration graphs for adjusting movement values and obtaining foot pressure on the support.

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To determine the optimal placement of sensors to improve the accuracy of measurement, it is necessary to post a pressure distribution (or displacement) curve according to preliminary experience obtained by uniformly placing the sensors. The curve is described by the function f (x), where y is the pressure value, ax-length on the track pad across the cross section. The error of experience is f - 0.03 MPa} it is obvious that if you take readings through 0.03 MPa, the measurements will give the greatest accuracy. We divide the function f (x) into elements

tary areas fjCx), 1g (x) ..., which can be described by regular elementary curves or straight lines. Having set d y cG 20 0.03 MPa, we find the values of Dx.,, Nd xy, ..., and x - the distance between the measurement dates.

Sensors 1 are placed and fixed in holes 2, drilled in the sole 3 and the main insole 4, as well as in a steel plate 5 on which the semi-pair of shoes 6 is fixed (Fig. 2). The shoes are fixed on the table with the help of lacing 7. The sensors are placed according to the obtained theoretical dependence and along the main cross-sections of the pad. The diameter of the hole is 4 mm, since the diameter of the sensor probe is 3 mm. A total of 64 holes are drilled. To determine the movement, a sensor 1 is used, the slider 8 of which is connected to the conductive element 9 and the device 10 to take readings (digital voltmeter).

The determination of the displacements p for each point is carried out as follows: when a load on the sole 3 and the main insole 4 occurs, the probe of sensor 1 begins to move. The magnitude of its displacement is equal to the vertical displacement under loading. The terminals of sensor 1 are connected to a digital voltmeter 10, which is removed

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The sensor readings, then the signals about the magnitude of the readings are transmitted to a recording device (not shown). The determination of pressure is carried out according to a calibration schedule.

On the slider 8 of the sensor 1, when moving along the conductive element 9, the potential changes, the value of which can be measured with a digital I voltmeter 10.

The circuit of one sensor is shown in FIG. 2. To measure the movement across the entire surface of the insole, the circuit shown in FIG. 3, consisting of 64 (2) sensors.

The obtained calibration curves make it possible, after measuring the vertical displacements of the perforated sole sections (412), to proceed to the vertical displacement of the non-perforated sole (41,) and to determine the pressure of the foot on the support.

Claims (1)

Thus, the proposed method allows to increase the accuracy of measurements of the foot pressure on the support and to expand the measurement range. Invention Formula The method for determining the optimal inner shape of the shoe, which consists in measuring the pressure of the foot along the cross-sectional lines of the footprint and then adjusting the inner shape of the shoe, is characterized in that, in order to improve the accuracy of determination by creating conditions for pressure equalization, determine the nature of the pressure change of the foot on the support, on which the areas of the greatest intensity of the pressure change are found, the measurement is carried out additionally at the points of the greatest intensity of measurement The pressure is applied, and the adjustment of the inner shape of the shoe is carried out by profiling the insole in accordance with the pressure value for its adjustment. about HH Dx2 Dx3 i x (e / w) UL; e (mm} 3 lefMffd)