KR100970107B1 - Muscular power measuring device and measurement method thereof - Google Patents

Abstract

The present invention relates to a muscular strength measuring apparatus, and more particularly, to a muscular strength measuring apparatus for measuring the force applied through the finger using a strain gauge and a measuring method thereof. As a means for achieving this, a muscle strength measurement block protruding so that one side of the body is deformable to an object; Seating surface formed by at least two ends in the body and deformed by the force of the object; Characterized in that formed, including; measuring sensor is installed on the seat surface to measure the muscle strength of the object. According to the present invention, it is possible to accurately measure the muscle strength of the human, it can be applied to the robot industry or medical prosthetic and prosthetic to have a movement similar to the human precise movement. In addition, the strength of the robot or medical prosthesis can be measured to adjust the strength. In addition, it is possible to treat the patient safely and objectively by measuring the strength of the finger force to an accurate value, such as when a doctor pulls a patient's skin with a finger to diagnose.

Strength measurement, strain gauge, Wheatstone bridge

Description

Muscular power measuring device and measurement method

The present invention relates to a muscular strength measuring apparatus, and more particularly, to a muscular strength measuring apparatus for measuring the force applied through the finger using a strain gauge and a measuring method thereof.

Every year, the number of people with disabilities caused by diseases and accidents is increasing, and the rehabilitation and normal social rehabilitation of these people with disabilities are emerging as a big social problem. Therefore, a lot of research has been done on rehabilitation equipment and orthoses, and one of them is an artificial number worn by a handicapped person without a hand or an arm.

In order to use the artificial tree like a real human arm or hand, it is necessary to accurately measure the strength of the actual force of the real hand and apply it to the artificial tree. However, it was difficult to measure the exact amount of human force.

Accurate measurements of these forces are not necessarily limited to the application of the prosthetic hand. If the muscle strength of the mechanical devices, such as artificial robots, which take the place of human beings, cannot be accurately measured, there is a limit in implementing fine movements.

In addition, even when doctors or oriental medical doctors use the fingers to treat patients, accurate data on finger strength did not exist, and thus, accurate and stable medical care was not achieved.

The present invention is to solve the above problems, an object of the present invention is to measure the strength of the force to pick up the object by using the finger muscle strength measuring apparatus that can be applied to the artificial hand or the finger of the robot and its measuring method To provide.

In addition, another object of the present invention to provide a muscle strength measuring device and a method for measuring the strength of the finger force to objectively perform the medical treatment of the oriental doctor.

As a means for achieving the above object,

Muscle strength measurement block protruding so that one side of the body is elastically deformable to the object; A seat surface formed of at least two ends inside the body and elastically deformed by the force of the object; It is installed on the seat surface, a measuring sensor for measuring the muscle strength of the object based on the amount of elastic deformation; characterized in that it comprises a formed.

In addition, the muscle strength measurement block, the first acupressure portion protruding on one side of the body; And a second acupressure part protruding from one side of the body to be spaced apart from the first acupressure part.

In addition, the first and second acupressure part is characterized in that one side is connected inside the body.

In addition, the seat surface is characterized by consisting of the upper seat and the lower seat facing each other in parallel.

In addition, the seat surface is characterized in that at least two measuring grooves are formed on the surface opposite to the surface on which the measuring sensor is installed.

In addition, the measuring groove is characterized in that formed in the width direction of the body.

In addition, the measuring sensor is characterized by a strain gauge.

In addition, the strain gauge is characterized in that the first and second compression strain gauge and the first and second tensile strain gauge.

In addition, the strain gauge is characterized in that one compression strain gauge and one tension strain gauge are installed on the upper seat and the lower seat.

In addition, the strain gauge is characterized in that each is installed in a position corresponding to the measuring groove in the seat surface.

In addition, the strain gauge is characterized in that it is installed so as to be formed in the longitudinal direction of the body while being perpendicular to the direction of the acting force.

The strain gauges are also connected in the form of Wheatstone bridges.

In addition, the Wheatstone bridge is formed by connecting the first compression strain gauge and the second compression strain gauge face each other, and the first tensile strain gauge and the second tensile strain gauge are connected to face each other.

The Wheatstone Bridge also features an input connected to the power supply and an output connected to the instrument.

In addition, the object is characterized in that any one of the human finger, artificial finger or robot finger.

In addition, the muscle strength measuring device is characterized in that formed of aluminum.

In addition, a method for measuring muscle strength using the muscle strength measuring apparatus, the method comprising: applying power to the muscle strength measuring apparatus; Strain is generated in the strain gauge while the muscle strength measurement block is deformed by the object; Measuring a potential difference through a measuring instrument connected with the Wheatstone bridge to change the resistance of the generated strain; It is characterized by consisting of; obtaining the muscle strength by using the measured potential difference.

According to the present invention, it is possible to accurately measure the muscle strength of the human, it can be applied to the robot industry or medical prosthetic and prosthetic to have a movement similar to the human precise movement.

In addition, the strength of the robot or medical prosthesis can be measured to adjust the strength.

In addition, it is possible to treat the patient safely and objectively by measuring the strength of the finger force to an accurate value, such as when a doctor pulls a patient's skin with a finger to diagnose.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to components of each drawing, the same reference numerals are used for the same components as much as possible even if they are shown in different drawings.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

(Configuration of strength measuring device)

1 is a perspective view of a muscle strength measuring apparatus according to the present invention. As shown in FIG. 1, the muscular strength measuring apparatus 100 includes a muscular strength measuring block 130 protruding from one side of the body 110 to be elastically deformable to the object 200; A seat surface 160 formed in at least two stages inside the body 110 and elastically deformed by a force of the object 200; It is installed on the seat surface 160, a measurement sensor for measuring the muscle force of the object 200 based on the amount of elastic deformation; and formed.

The strength measurement block 130 may include: a first acupressure part 132 protruding from one side of the body 110 formed of aluminum; It is spaced apart from the first acupressure portion 132, the second acupressure portion 134 protruding on one side of the body 110; consists of. In this case, the first acupressure part 132 and the second acupressure part 134 are connected inside the body 110.

The seating surface 160 includes an upper seating surface 160a and a lower seating surface 160b facing in parallel with each other. At this time, the seat surface 160 has at least two measuring grooves 180 are formed in the width direction of the body 110 on the surface opposite to the surface on which the measuring sensor is installed. The measuring groove 180 is formed with a gentle curvature so that the stress does not concentrate only in one part but acts uniformly.

Strain gauge 150 is used as the measurement sensor, strain gauge 150 is composed of the first, second compression strain gauges (151a, 151b) and the first, second tensile strain gauges (153a, 153b).

The strain gage 150 to be described below includes the first and second compression strain gages 151a and 151b and the first and second tensile strain gages 153a and 153b. In addition, the compressive strain gauges are shown including the first and second compression strain gauges 151a and 151b, and the tensile strain gauges are shown including the first and second tensile strain gauges 153a and 153b.

Hereinafter, a method of installing the strain gauge 150 on the upper seat surface 160a and the lower seat surface 160b of the muscle strength measuring apparatus 100 will be described.

2 is a flowchart illustrating a process of installing a measurement sensor in the muscle strength measuring apparatus according to the present invention. As shown in FIG. 2, the method of installing the strain gauge 150 on the seat surface 160 includes: forming a seat surface 160 inside the body 110 and preparing a measurement sensor (S10); Attaching a measurement sensor to the upper seat surface 160a and the lower seat surface 160b (S20); Clamping the measuring sensor attached to the seat surface 160 (S30); And curing the measuring sensor bonded to the seat surface 160 (S40).

The upper seat surface 160a and the lower seat surface 160b are configured to face each other in parallel in the body 110 of the muscle strength measuring apparatus 100. In this case, first and second measurement grooves 180a and 180b are formed in the upper seat surface 160a, and third and fourth measurement grooves 180c and 180d are formed in the lower seat surface 160b, respectively. In addition, each measuring groove 180 is formed in the width direction of the body (110). The sensitivity and capacity of the muscle strength measuring apparatus 100 are determined by the thickness of the seat surface 160 at the position where the strain gauge 150 is attached.

Four strain gauges 150 are installed on the seat surface 160 at positions corresponding to the respective measuring grooves 180. That is, the first compression strain gauge 151a and the second tensile strain gauge 153b are respectively installed in the lower seat surface 160b corresponding to the first measurement groove 180a and the second measurement groove 180b. In addition, a first tension strain gauge 153a and a second compression strain gauge 151b are installed in the upper seat surface 160a corresponding to the third measurement groove 180c and the fourth measurement groove 180d, respectively.

The strain gauge 150 is installed to be formed in the longitudinal direction of the body 110 while being perpendicular to the direction of the force acting by the object 200. That is, the acting directions of the first and second compression strain gauges 151a and 151b and the first and second tension strain gauges 153a and 153b are all provided in the same manner. In addition, the upper seating surface (160a) and the lower seating surface (160b) is installed so that each includes a compression strain gauge and one tensile strain gauge.

Each strain gauge 150 installed in the seat surface 160 is bonded with an adhesive.

The bonded strain gage 150 and the seat surface 160 are clamped by applying pressure to the clamping forceps. At this time, the clamping is made of a pressure of 3 ~ 3.5 kgf / ㎠.

After the clamping step, the seat surface 160 and the strain gauge 150 undergo a first curing process and a second curing process.

In the first curing process, the temperature is raised from 20 ° C. to 175 ° C. for 30 minutes and then cured by maintaining the state at a temperature of 175 ° C. for 1 hour.

In addition, in the secondary curing process, after raising the temperature from 20 ° C. to 195 ° C. for 30 minutes, curing is maintained at 195 ° C. for 2 hours.

3 is a Wheatstone bridge circuit constructed using a strain gauge according to the present invention. As shown in FIG. 3, the first and second compression strain gauges 151a and 151b and the first and second tensile strain gauges 153a and 153b installed through the above process are connected in the form of Wheatstone bridge. do.

Wheatstone bridge is a differential amplifier circuit for measuring the potential difference from a pair of contacts by applying power to a pair of contacts. That is, the muscle strength can be measured using this potential difference.

When connecting the four strain gauges 150 in the form of a Wheatstone bridge, the first compression strain gauge 151a and the second compression strain gauge 151b are connected to face each other, thereby compressing the force applied to the seat surface 160. This changes the resistance value. In addition, the first tensile strain gage 153a and the second tensile strain gage 153b are connected to each other so that the resistance value is changed by the tensile force of the force applied to the seat surface 160.

Four Wheatstones (A, B, C, D) are formed in the Wheatstone Bridge, a pair of opposing contacts is connected to the power supply 300, the other pair of contacts are connected to the meter 350 do.

That is, the contact point (A) where the first compression strain gauge 151a and the first tension strain gauge 153a meet, and the contact point (C) where the second tension strain gauge 153b and the second compression strain gauge 151b meet. The power supply 300 is connected. In addition, the measuring device at the contact point (B) where the first compression strain gauge 151a and the second tensile strain gauge 153b meet and the contact point (D) where the first tension strain gauge 153a and the second compression strain gauge 151b meet. 350 is connected. That is, the contact point A and the contact point C are connected to the power supply 300 to receive power, and the contact point B and the contact point D are connected to the meter 350 to measure the potential difference. .

In addition, the object 200 represents any one of a human finger, a robot finger, or a finger of a prosthesis. In the present invention, a human finger is used as the object 200.

(Measuring strength method)

Hereinafter, a method of measuring muscle strength using the present invention muscle strength measuring apparatus 100 will be described.

Figure 4 is a side view showing the measurement of the muscle strength of the object using the muscle strength measuring apparatus according to the present invention, Figure 5 is a flow chart showing a method of measuring muscle strength using the muscle strength measuring apparatus. As shown in Figure 4 and 5, the muscle strength measuring method using the muscle strength measuring apparatus 100 includes the step of applying power to the muscle strength measuring apparatus 100 (S100); A step of generating strain in the strain gauge 150 while the muscle force measurement block 130 is deformed by the object 200 (S200); Measuring a potential difference through the measuring unit 350 connected to the Wheatstone bridge to change the resistance of the generated strain (S300); Obtaining muscle strength using the measured potential difference (S400); consists of.

First, in order to measure muscle strength, power is applied to the muscular strength measuring apparatus 100 to operate the muscular strength measuring apparatus 100. That is, by applying power to the Wheatstone bridge, it is possible to measure the force applied to the muscle strength measurement block 130. In general, connect 5 ~ 10 Vdc to the (+) input terminal and 0 Vdc to the (-) input terminal. (S100)

The muscle strength measurement block 130 of the activated muscle strength measurement apparatus 100 is picked up by two fingers, which are objects 200. For example, the thumb presses the second acupressure part 134 downward, and the second finger applies the force by holding the first acupressure part 132. At this time, the first acupressure part 132 and the second acupressure part 134 are bent by the force applied from the finger, and the gap therebetween is narrowed.

That is, due to the bending of the muscle strength measurement block 130, the seat surface 160 is also deformed while inclined in the direction in which the muscle strength measurement block 130 is formed. On the other hand, due to the deformation of the seat surface 160, strain, that is, strain occurs in the strain gauge 150 installed in the seat surface 160. At this time, since the force applied from the object 200 is concentrated in each of the measuring grooves 180, deformation of the strain gauge 150 occurs well, thereby outputting a large signal, thereby making it possible to reliably measure the potential difference. (S200)

The force applied to the muscle force measurement block 130 is caused by a change in resistance due to the compressive force in the first and second compression strain gauges 151a and 151b and the tensile force in the first and second tension strain gauges 153a and 153b.

The resistance change in the strain gauge 150 is generated by the Wheatstone Bridge as a potential difference, which is measured through the meter 350 connected to the Wheatstone Bridge. The potential difference through the instrument can be measured up to 30 N (S300).

That is, the measured potential difference is a measure of the difference between the force applied by the two fingers, it is possible to express the muscle strength of the finger numerically through the muscle strength measuring apparatus (100) (S400).

By using the apparatus and method described above, it is possible to measure and express numerically the muscle strength of not only a human finger but also a finger or a robot. This is reflected in the design and design of robots and prostheses, so that muscle strength similar to the actual human body can be realized.

In addition, by adjusting the length of the muscle strength measurement block 130 of the present invention muscle strength measurement apparatus 100 it is possible to measure the muscle strength using several fingers.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will include such modifications and variations as long as they fall within the spirit of the invention.

1 is a perspective view of a muscle strength measuring apparatus according to the present invention.

2 is a flowchart illustrating a process of installing a measurement sensor in the muscle strength measuring apparatus according to the present invention.

3 is a Wheatstone bridge circuit constructed using strain gauges in accordance with the present invention.

Figure 4 is a side view showing the measurement of the muscle strength of the object using the muscle strength measuring apparatus according to the present invention.

5 is a flowchart showing a method of measuring muscle strength using a muscle strength measuring apparatus.

Explanation of symbols on main parts of drawing

100: muscle strength measuring device 110: body

130: muscle strength measurement block 132: first acupressure unit

134: second acupressure unit 150: strain gauge

151a: first compression strain gauge 151b: second compression strain gauge

153a: First tensile strain gauge 153b: Second tensile strain gauge

160: seat 160a: upper seat

160b: Lower seat 180: Measuring groove

180a: first measuring groove 180b: second measuring groove

180c: third measuring groove 180d: fourth measuring groove

200: object 300: power supply

350: measuring instrument

Claims (17)

A muscle force measuring block 130 protruding from one side of the body 110 to be elastically deformable to the object 200; A seating surface formed of at least two stages inside the body 110 and elastically deformed by the force of the object 200, and comprising a seating surface having an upper seating surface 160a and a lower seating surface 160b facing each other in parallel. 160; The measuring sensor is installed on the seat surface 160 and measures the muscle force of the object 200 based on the amount of elastic deformation is a strain gauge 150, the strain gauge 150 is the first, second compression strain gauge (151a) 151b) and the first and second tensile strain gauges (153a, 153b); muscle strength measuring apparatus comprising a. The method of claim 1, The muscle strength measurement block 130, A first acupressure part 132 protruding from one side of the body 110; And a second acupressure part (134) protruding from one side of the body (110) to be spaced apart from the first acupressure part (132). 3. The method of claim 2, The first and second acupressure unit (132, 134) is a strength measurement device, characterized in that one side is connected in the interior of the body (110). delete The method of claim 1. The seat surface 160 is a strength measurement device, characterized in that at least two measuring grooves 180 are formed on the surface opposite to the surface on which the measurement sensor is installed. The method of claim 5, The measuring groove 180 is a muscle strength measuring apparatus, characterized in that formed in the width direction of the body (110). delete delete The method of claim 1, The strain gauge (150) is a muscle strength measuring device characterized in that the compression strain gauge and the tension strain gauge is installed on each of the upper seat surface (160a) and the lower seat surface (160b). The method of claim 5, The strain gauge 150 is a muscle strength measuring apparatus, characterized in that installed in the position corresponding to the measuring groove 180 on the seat surface 160, respectively. The method of claim 10, The strain gauge 150 is a muscle strength measuring device, characterized in that it is installed so as to be formed in the longitudinal direction of the body 110 and the working direction perpendicular to the direction of the acting force. The method of claim 11, The strain gauge 150 is a strength measurement device, characterized in that connected in the form of Wheatstone bridge. The method of claim 12, The Wheatstone bridge is connected to the first compression strain gauge 151a and the second compression strain gauge 151b so as to face each other, and the first tensile strain gauge 153a and the second tensile strain gauge 153b are connected to each other. Muscle strength measuring device, characterized in that the connection is formed facing. The method of claim 13, The Wheatstone bridge is a strength measurement device, characterized in that the input terminal is connected to the power supply device 300, the output terminal is connected to the measuring instrument (350). The method of claim 1, The object 200 is a muscle strength measuring device, characterized in that any one of a human finger, artificial finger or robot finger. The method of claim 1, The strength measurement apparatus is a strength measurement apparatus, characterized in that formed of aluminum. The method for measuring muscle force using the muscle strength measuring apparatus 100 according to any one of claims 1 to 3, 5 or 6, 9 to 16, Applying power to the muscle strength measuring apparatus (100) (S100); A step of generating strain in the strain gauge 150 while the muscle force measurement block 130 is deformed by the object 200 (S200); Measuring a potential difference through the measuring unit 350 connected to the Wheatstone bridge to change the resistance of the generated strain (S300); And a step of obtaining muscle strength using the measured potential difference (S400).

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