RU31945U1 - Device for measuring the power parameters of the brush - Google Patents

Abstract

A device for measuring the power parameters of the brush, including the support and elastic elements with strain gauges fixed on it, combined in a bridge circuit connected to the measuring system, characterized in that the support element is made in the form of two semi-cylindrical traverses, the diameter of which can be changed by applying and removing interchangeable plates made in the form of hollow wooden half-cylinders, strain gages on an elastic element are taken out of the space between the working half-planes and combined into two bridges e circuit.

Description

DEVICE FOR MEASURING POWER BRUSH PARAMETERS

The invention relates to medicine, namely, to devices for diagnostics and can be used for functional research of the power characteristics of the hand in traumatology, orthopedics, surgery, neurology, sports medicine, in the process of rehabilitation, for professional selection, research in the physiology of work, sports, and examinations of working capacity , aerospace medicine.

The device is designed to measure the power parameters of a person’s hand.

There are various devices for measuring the power parameters of a human hand: A.C.J421688846 Lobzin B.C., Zhulev N.M., Pustozerov V.G. "A device for measuring muscle A.S. No. 1222244 Zemlyakov V.V. et al. "Reversible dynamometer; A.S.№1715363 Yastrebtsev I.B. "Manual dynamometer; A.C.J42122244 Zemlyakov V.V. et al. "Reversible dynamometer; A.C.JVb 1426540 Sigal M.A., Korablev V.G., Tolmachev K.V. Device for measuring muscle strength and endurance; Edwards G. Isometric force measuring device, Palo Alto, Calif., Assignor to Greenleaf Medical Systems ins. Ser. N, 581452.

/ cp // - 9 /

OBJECT - DEVICE

A 61 V 5/22

However, the use in medical practice is limited only to the registration of maximum force. There is no way to study the power parameters of the brush in the temporal aspect. The use of strain gauges allowed to overcome this drawback, but the latter have low frequencies of natural oscillations and therefore significant errors are possible when registering rapidly changing forces.

Closest to the proposed technical solution is the "Dynamometer carpal strain gauge. Authors: Veshutkin V.D., Smirnov G.V., Radau Yu.V., Danilov V.I. Patent No. 2118508, 1996 This device was chosen by us for the prototype.

The dynamometer consists of an elastic element made in the form of two flat beams, having 1; their thickening at the ends and in the middle. End thickenings are used to connect two beams with screws, and medium thickenings are used to attach handles. The elastic element is glued with strain gages and combined into a bridge measuring circuit. A measuring system consisting of an amplifier and a measuring device is connected to the half-bridge circuit using a cable.

Significant disadvantages of the known device are:

1. limitation of functionality when determining dynamometric indicators of the state of the brush;

2. uneven compression force by the brush of the force meter;

.

3. the impossibility of counting the total and differential signals, the first of which carries information about the strength, the second - about the uneven compression of the brush.

The aim of the invention is to expand the functionality of dynamometric studies, increasing their accuracy. This result is achieved by the fact that the design of the device contains a support element made in the form of two semi-cylindrical metal traverses, the diameter of which can be changed by applying and removing removable wooden plates, in the form of half-cylinders, the strain gages on the elastic element are located on two force sensors, moved out of space between the working half-planes and combined in two bridge schemes. Thereby expanding the functionality of the power meter by counting two signals: - total, carrying; its information about the compression force of the brush; -difference, nesush; his information about the unevenness of compression of the brush; -the ability to study the power parameters of the brush in a temporary aspect.

A device for measuring the power parameters of the brush (Fig. 1) consists of a base 1, consisting of two semi-cylindrical traverses, on which replaceable pads are fixed with the aid of a contact tape 2. Base 1 is mechanically connected to force sensors 3 and 4 made in the form of rings with glued strain gauge elements the outputs are connected to the inputs of the amplifiers 5 and 6, respectively, "the zero outputs of the amplifiers are connected to each other and to the resistors 7 and 8, respectively, as well as to the resistor 9, which in turn is connected to the common chke between the resistors 7 and 8. The general control and automation of load tests, statistical analysis, calculation parameters static muscle force and to make decisions on the results of tests carried out using standard digital-analog converters (10), the computer (11).

This device allows you to increase accuracy with dynamometric studies and conduct functional diagnostics, assess damage to the hand and determine the effectiveness of therapeutic measures.

The device allows you to record and analyze the following indicators of static muscle effort:

1. maximum muscle effort;

2. maximum muscle endurance;

3.resistance to static load;

4. Reproduction of a given muscle effort.

When using the proposed "Device for measuring the power parameters of the brush provides the following positive effects:

1. the device provides an objective assessment of the functional state of the muscles of the hand in dynamics;

2. The use of the proposed device is possible in any conditions of inpatient and outpatient services of practical medicine.

When the device is operating, fingers and palm act on the base 1 through interchangeable pads 2. The base 1 is mechanically connected to force sensors 3 and 4, whose signals are amplified to the required value with the help of amplifiers 5 and 6 and fed to a circuit consisting of resistors 7, 8 and 9, with the help of which two types of signals are counted:

-total, carrying information about the compression force removed from the resistor 9;

-difference, carrying information about the unevenness of the compression force removed from resistors 7 and 8.

Using a standard digital analog converter (10), the signal is sent to a computer (11), where a statistical analysis is carried out, and calculation of static muscle effort.

The proposed device was used in 100 patients with diseases and consequences of injuries of the hand, which significantly improved the diagnosis, reduced the number of diagnostic errors by 12.3% and optimized recovery treatment. The ability to register a device with rapidly changing force parameters in a temporal aspect, documenting research data is of paramount importance in assessing the functional state of the hand in this group of patients.

Claims (1)

A device for measuring the power parameters of the brush, including the support and elastic elements with strain gauges fixed on it, combined in a bridge circuit connected to the measuring system, characterized in that the support element is made in the form of two semi-cylindrical traverses, the diameter of which can be changed by applying and removing interchangeable plates made in the form of hollow wooden half-cylinders, strain gages on an elastic element are taken out of the space between the working half-planes and combined into two bridges e circuit.