CN111035401B

CN111035401B - Upper limb strength testing device and using method thereof

Info

Publication number: CN111035401B
Application number: CN201911395538.6A
Authority: CN
Inventors: 孙怡宁; 吴忆东; 周旭; 杨先军; 李冕; 姚志明; 马祖长; 高理升; 张晓翟; 王涛
Original assignee: Hefei Institutes of Physical Science of CAS
Current assignee: Hefei Institutes of Physical Science of CAS
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2022-11-04
Anticipated expiration: 2039-12-30
Also published as: CN111035401A

Abstract

The invention discloses an upper limb strength testing device and a using method thereof, and belongs to the technical field of health promotion. The upper limb strength testing device and the using method thereof are based on the isometric muscle strength measuring principle, adopt a double-fixed-hinge support beam type structure, and position, adjust and support the human body through a bracket and a seat, so that a testee can apply thrust and tension to a force measuring device in a set mode; by detecting the output signals of the force transducers arranged at the two hinged supports, the normal push-pull force acting on the holding handle and the position of the acting point can be calculated, and the test and the evaluation of the upper limb strength level are realized. The invention has the advantages of simple structure, convenient use, low cost, good safety, high reliability and the like, and is convenient to apply in related fields.

Description

Upper limb strength testing device and using method thereof

Technical Field

The invention belongs to the technical field of health promotion, relates to an upper limb strength testing device and a using method thereof, and particularly relates to an upper limb equal-length strength testing device and a using method thereof.

Background

The human upper limb skeletal-muscular system is very complex, and the daily upper limb activities of the human body are realized by the upper limb skeletal system under the action of the upper limb muscular system. Quantitative assessment of the human upper limb strength level has certain requirements in the fields of rehabilitation medicine assessment, sports human body science research and the like. At present, the commonly used human body strength evaluation principles can be roughly divided into isometric measurement, isotonic measurement, isokinetic measurement and indirect measurement. The isometric measurement has good repeatability, high safety and low requirement on measurement conditions, and is convenient to realize in the design of the device, so that the measurement principle is widely applied to the field of human strength measurement.

Chinese utility model patent application No. ZL201610318893.3 discloses an upper limbs muscle strength tester, which measures the upper limbs strength level of a test person by measuring the force of the test person pulling the pull ring connected to one end of the pull rope through a tension sensor. The device can adapt to the demand of measuring different height crowds and measuring different upper limbs position through the fixed pulley height of adjustment guide stay cord, however, the experimenter measures the posture at will, and the experimenter health probably takes place to rock in the measurement process, can't avoid the compensation of other positions of health in the measurement process, and these factors all can influence measuring result's degree of accuracy and repeatability.

An intelligent force measuring chair with an adjustable backrest is disclosed in the Chinese utility model patent with the application number of ZL201821698288.4, and the tested person is positioned and supported through a manual and electric adjusting mechanism, so that different tested persons can complete the test under the specified posture, and the measuring accuracy and repeatability are improved. However, this device can only measure the elbow flexion force in one posture, and the measurement mode is single, and may not be enough to fully reflect the upper limb strength level of the subject.

In the US invention patent No. US 8603012B2, a measurement device for comparing the strength levels of muscles on both sides of a human body is disclosed, which positions and supports a human subject through a back cushion on a frame, and evaluates the strength level of the corresponding part of the human subject by measuring the contact force applied to the measurement arms of the device by the head and the limbs of the human subject in various standard measurement postures. Meanwhile, the difference of the strength levels of the bilateral limbs of the testee is evaluated by comparing the measurement results. However, the measuring arm of the device can only measure the force in the direction perpendicular to the measuring arm, and the force parallel to the measuring arm cannot be measured, so that the limb must exert force in the direction perpendicular to the measuring arm to accurately measure, and the measurement posture is difficult to position. The measured force is related to the front and back positions of the measuring arm measuring head along the limb, and the accurate positioning of the position is ensured to ensure the accuracy and repeatability of the measurement.

In view of the defects of the testing device, the invention discloses an upper limb strength testing device and a using method thereof, which realize strength testing in the modes of pushing, pulling, pressing, supporting and the like of the upper limbs on one side and the upper limbs on two sides, and have the advantages of simple structure, convenience in use, low cost, good safety, high reliability and the like.

Disclosure of Invention

In order to accurately and conveniently evaluate the overall level of the upper limb strength of the human body, the invention provides positioning and supporting for the testee in a sitting posture state, and the upper limb strength level of the testee is obtained by measuring the acting force of the single hand of the testee on the grips in the states of different included angles of the big arm and the small arm in the modes of pushing, pulling, supporting, pressing and the like.

In order to realize the functions, the invention provides an upper limb strength testing device which mainly comprises a force measuring component, a back support, a chest support, a seat and a bracket, wherein:

the force measuring assembly mainly comprises two grips, a force measuring beam, two fixed hinged supports, two pull pressure sensors and an installation bottom plate; the two handles are arranged at two ends of the force measuring beam, the force measuring beam is respectively connected to the two tension and pressure sensors by two fixed hinged supports in a plane, and the tension and pressure sensors are fastened on the mounting base plate;

the back support and the chest support consist of front and rear telescopic rods and rod tail end limiting plates; the back support is arranged on the backrest of the seat, and the force measuring component, the chest support and the bracket are assembled and then fixed in front of the seat.

Furthermore, the force measuring beam is a plane bending rod piece and is supported by two fixed hinged supports in the plane, the force measuring assembly is divided into three sections by the fulcrums of the fixed hinged supports, and a subject holds the pushing and pulling force applied by the handle and vertical to the rod piece and is detected by two pulling pressure sensors; the magnitude and the position of the acting force of the testee can be calculated by pulling the distance between the magnitude of the output signal of the pressure sensor and the fulcrum.

Furthermore, by changing the fastening mode, the force measuring assembly is horizontally or vertically fastened on the bracket through the mounting base plate, so that the test of four acting forces of pushing, pulling, pressing and supporting the grip by the testee is realized.

Further, an upper limb strength testing device using method, before measurement, a subject sits on a seat, the sitting posture and the height of the force measuring component are adjusted, so that two arms and a handle are in a set angle, telescopic rods for back support and chest support are adjusted, a trunk is clamped front and back, and the sitting posture is fixed; during measurement, a test subject pushes/pulls/presses/holds the grip with one hand and pushes/pulls/presses/holds with two hands according to the requirements of a test flow, and the acting force of the test subject on the grip is acted on the pull pressure sensor through the force measuring beam and the fixed hinge support; the output signals of the two pull pressure sensors are detected, and then the acting force and the position of the acting point can be calculated.

Compared with the prior art, the invention has the advantages that:

(1) The invention ensures that the measuring posture of the subject is fixed through the chest and back support, prevents compensation of other parts of the body in the measuring process, and effectively improves the accuracy and repeatability of the measuring result.

(2) The invention can realize the force test of the single-side upper limb and the double-side upper limb in various modes such as pushing, pulling, pressing, supporting and the like so as to comprehensively reflect the upper limb force level of the tested person.

(3) The invention adopts the fixed hinge support structure, can simultaneously measure the forces of upper limbs on both sides, eliminates the influence of the action position of the handle, and has simple and convenient use and high test efficiency.

Drawings

FIG. 1 is a schematic diagram of the upper limb strength test of the present invention;

FIG. 2 is a schematic view of a force measuring assembly according to the present invention;

FIG. 3 is a schematic view of the force measurement principle of the present invention;

fig. 4 is a schematic top view of an embodiment of the present invention.

Wherein: the device comprises a force measuring component 1, a back support 2, a chest support 3, a seat 4, a bracket 5, two grips 1-1, a force measuring beam 1-2, two fixed hinged supports 1-3, two tension and pressure sensors 1-4 and an installation bottom plate 1-5.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in figure 1, the upper limb strength testing device and the use method thereof are characterized in that the testing device mainly comprises a force measuring component 1, a back support 2, a chest support 3, a seat 4 and a bracket 5. Wherein, the seat 4 and the bracket 5 are fixed on a supporting surface, the back support 2 is arranged on the backrest of the seat 4, and the force measuring component 1 and the chest support 3 are arranged on the bracket.

The force measuring assembly 1 can be vertically adjusted in height, or horizontally or vertically fastened to the bracket 5 by changing the fastening mode, and is used for setting the strength measuring posture and angle of the testee;

the back support 2 and the chest support 3 can be adjusted in position up and down and also can stretch back and forth, and are used for fixing the trunk of a testee and ensuring the repeatability of the strength testing process.

As shown in FIG. 2, the force measuring assembly 1 mainly comprises two grips 1-1, a force measuring beam 1-2, two fixed hinged supports 1-3, two tension and pressure sensors 1-4 and an installation base plate 1-5, and is of a bilaterally symmetrical structure. The two handles 1-1 are arranged at two ends of a force measuring beam 1-2, the force measuring beam 1-2 is respectively connected to two tension and pressure sensors 1-4 through two fixed hinged supports 1-3 in a plane, and the tension and pressure sensors 1-4 are fastened on an installation base plate 1-5;

the center of the force measuring beam 1-2 is provided with a flat key groove, and the side surface of the flat key groove is provided with two through holes for penetration. The fixed hinge support 1-3 is composed of a threaded rod, a pin shaft, a cotter pin and the like. The head of the threaded rod is connected to the through hole of the force measuring beam 1-2 through a pin shaft and is fixed through a cotter pin; the threaded end is connected into the tension and pressure sensor 1-4 and is pre-tightened. The pulling pressure sensor 1-4 is fixed on the installation bottom plate 1-5. The fixed hinged supports 1-3 only limit the displacement at the supporting point and do not limit the deflection at the supporting point.

As shown in fig. 3, the equivalent principle of the upper limb strength measuring device of the present invention is described. Wherein, the actual effort F of the experimenter to the handle, two pull pressure sensor measured values are F1, F2 respectively, and the distance L1 between two sensors is known, then there is:

F＝F1+F2(I)

calculating the moment of the left hinge pivot: f L = F2L 1 (II)

(I) And (II) can calculate the actual acting force F and the position L of the acting point.

Fig. 4 is a top view of an embodiment of the upper limb strength measuring device according to the present invention. The way in which the force measuring assembly 1 is adjusted up and down in height and the way in which it is fastened to the bracket 5 is explained.

It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. An upper limbs strength testing arrangement which characterized in that: testing arrangement mainly comprises dynamometry subassembly (1), back support (2), chest support (3), seat (4), support (5), wherein:

the force measuring assembly (1) mainly comprises two handles (1-1), a force measuring beam (1-2), two fixed hinge supports (1-3), two pull pressure sensors (1-4) and an installation base plate (1-5); the two handles (1-1) are arranged at two ends of the force measuring beam (1-2), the force measuring beam (1-2) is respectively connected to the two tension and pressure sensors (1-4) through two fixed hinge supports (1-3) in a plane, and the tension and pressure sensors (1-4) are fastened on the mounting base plate (1-5);

the back support (2) consists of a rear telescopic rod and a rod tail end limiting plate, and the chest support (3) consists of a front telescopic rod and a rod tail end limiting plate; the back support (2) is arranged on the backrest of the seat, and the force measuring component (1), the chest support (3) and the bracket (5) are assembled and then fixed in front of the seat (4);

the force measuring beam (1-2) is a plane bending rod piece and is supported by two fixed hinged supports (1-3) in a plane, the force measuring component is divided into three sections by fulcrums of the fixed hinged supports (1-3), and a subject pushes and pulls the rod piece perpendicularly applied to the handle (1-1) and is detected by two pull pressure sensors (1-4); the magnitude of the acting force of the testee and the distance between the fulcrums can be calculated by pulling the magnitude of the output signal of the pressure sensor (1-4);

by changing the fastening mode, the force measuring assembly (1) is horizontally or vertically fastened on the bracket (5) through the mounting bottom plate (1-5), so that the test of four acting forces of pushing, pulling, pressing and supporting the handle (1-1) by a test subject is realized.

2. A method of using the upper limb strength test apparatus according to claim 1, wherein: before measurement, a subject sits on a seat (4), the height of the sitting posture and force measuring assembly (1) is adjusted, so that two arms and a grip (1-1) are in a set angle, telescopic rods of a back support (2) and a chest support (3) are adjusted, a trunk is clamped in front and back, and the sitting posture is fixed; during measurement, a test subject pushes/pulls/presses/holds in the palm of the grip (1-1) with one hand and pushes/pulls/presses/holds in the palm with two hands according to the requirements of a test flow, and the acting force of the test subject on the grip is acted on the pull pressure sensor (1-4) through the force measuring beam (1-2) and the fixed hinge support (1-3); the output signals of the two pull pressure sensors (1-4) are detected, and then the acting force and the position of the acting point can be calculated.