KR20090044655A

KR20090044655A - Sensor for measuring angular displacement using optical fiber and method for manufacturing the same

Info

Publication number: KR20090044655A
Application number: KR1020070110849A
Authority: KR
Inventors: 유재호; 황진상
Original assignee: 유재호
Priority date: 2007-11-01
Filing date: 2007-11-01
Publication date: 2009-05-07

Abstract

In the angle measuring sensor and the manufacturing method of the angle measuring sensor using an optical fiber, the angle measuring sensor is connected to the rotatable portion of the first light receiving portion, the light receiving portion is carried on one side of the light receiving unit is rotatable so that the light receiving portion can be rotated And a third cover assembled with the second cover and the first and second covers. The first cover is fixed and covered by fitting the light emitting unit, and a first groove is formed to connect a first reference to a side for measuring an angle, and transmits and receives electrical signals to the light emitting unit and the light receiving unit. The lead portion is formed, and the second cover has a first hole is formed so that the connecting shaft formed on one side of the light receiving portion is rotatable, the space is formed as much as the area of the light receiving unit rotates, The light emitting unit includes a light emitting unit for generating light, a light emitting unit optical fiber including a light emitting surface formed at a second end of the light emitting unit and the first end of the light emitting unit, and a light emitting supporting unit supporting the light emitting unit and the light emitting unit optical fiber. The light emitting member may include a light receiver and a light emitter groove through which a line that transmits and receives an electrical signal to the light emitter may pass. Thus, miniaturization, mass productivity and durability of the angle measuring sensor using the optical fiber can be improved.

Description

Angle sensor using optical fiber and manufacturing method thereof {SENSOR FOR MEASURING ANGULAR DISPLACEMENT USING OPTICAL FIBER AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to an angle measuring sensor using an optical fiber, and more particularly, to an angle measuring sensor using a miniaturized optical fiber which can be manufactured at a low cost and has improved durability.

The movement of the human body is defined as the change of displacement in time or space of the human body by the applied force. In rehabilitation therapy, it is important to indicate the angle in the theory of motion transfer for precise examination when performing joint motion. In general, an angle sensor for displaying an angle is called a tilt sensor, and the tilt sensor measures an angle at which the human body is tilted with respect to the ground. Therefore, it is difficult to measure the angle of each joint.

Meanwhile, a sensor for measuring the angle of the joint has also been developed. The sensor for measuring the angle of the joint includes an angle sensor and a probe, and may measure elbow, knee, and hip joints. However, since the probe operates mechanically, wear of the probe occurs when used repeatedly. Therefore, the joint measuring sensor including the probe has a problem that the precision decreases when used for a long time. In addition, since the production of the probe to a small size is limited, it is difficult to miniaturize the joint measuring sensor including the probe.

In addition, the angle sensor using the optical fiber should have a circuit portion for supplying power to the light emitting portion representing one side to measure the angle, the circuit portion of the light receiving portion of the second reference plane side to measure the angle corresponding to the one side is divided separately It is supposed to fall from utility and usability.

The technical problem of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an angle measuring sensor using a mass production and miniaturized optical fiber with reduced manufacturing cost and improved durability.

In addition, by applying the operation principle of "angle measurement sensor using optical fiber and its manufacturing method" of the international patent application No. 2006-003875 filed by one of the inventors of the present invention to provide an angle sensor that implements mass production and miniaturization will be.

In addition, another object of the present invention is to control the circuit portion that is disposed on the light emitting portion and the light receiving portion in a double, either at the light emitting portion or the light receiving side can be collectively controlled to reduce the manufacturing cost and improve the mass production angle using the miniaturized optical fiber It is to provide a method for manufacturing a measuring sensor.

In order to achieve the above object of the present invention, the angle measuring sensor includes a first cover on which the light emitting part is supported, a second cover and a first cover on which one side of the light receiving part is rotatably connected so that the light receiving part is supported and the light receiving part can be rotated. And a third cover assembled with the second cover.

The first cover is fixed and covered by fitting the light emitting unit, and a first groove is formed to connect a first reference to a side for measuring an angle, and transmits and receives electrical signals to the light emitting unit and the light receiving unit. The lead part which can be formed is formed.

The second cover has a first hole formed so that the connecting shaft formed on one side of the light receiving unit can be rotatable, and a space corresponding to an area in which the light receiving unit rotates is formed.

The light emitting unit includes a light emitting unit for generating light, a light emitting unit optical fiber including a light emitting surface formed at a second end of the light emitting unit and the first end of the light emitting unit, and a light emitting supporting unit supporting the light emitting unit and the light emitting unit optical fiber. The light emitting member may include a light receiver and a light emitter groove through which a line that transmits and receives an electrical signal to the light emitter may pass.

The light exit surface may be formed by cutting inclined toward the opposite side to the side where the light receiving portion rotates a lot. The light generated by the light emitter is totally reflected when passing through the light emitting part optical fiber, and is emitted only to the emission surface.

The light receiving unit is installed to face the light exit surface directly on the basis of the connection axis to fix the photosensor and the photosensor for measuring the amount of light emitted from the light exit surface, the connection axis is formed to form the photo sensor based on the connection axis It includes a light-receiving supporting portion to enable the rotational movement. In addition, when there is a distance between the photo sensor and the light exit surface, a light receiving unit optical fiber may be disposed between the photosensor and the light exit surface.

The connecting shaft connects the light receiving unit, the second cover, and the third cover.

In addition, the connecting shaft is formed with a second groove for connecting the second reference to the reference to the second side for measuring the angle.

The light exit surface may include an inclined surface cut to form a predetermined angle in the direction of the light receiver. The angle at which the first inclined surface is cut may range from 20 degrees to 35 degrees.

The angle measuring sensor may further include a third cover attached to the first and second cover parts to seal the light emitting part and the light receiving part.

The first cover may be formed with a first groove connecting the first reference to the first side for measuring the angle.

The light receiving unit may be provided with a second groove connecting a second standard reference to the second side for measuring the angle.

The first reference may be a wireless communication module for wirelessly transmitting a signal output from the angle sensor.

According to another aspect of the present invention, there is provided a method of manufacturing an angle measuring sensor, the method comprising: attaching a light emitter to a light emitting support part; Inserting, fixing the light emitting support part and forming a light exit surface at a predetermined angle to manufacture the light emitting part, placing the light emitting part in the first cover, and allowing the light receiving part to rotate in the first hole formed in the second cover. Fixing, and fixing and sealing the first cover and the second cover.

According to the present invention as described above, since the angle measuring sensor includes an optical fiber, a light emitting body and a photo sensor, it is possible to manufacture a simple structure, and the manufacturing cost is reduced.

In addition, when the light emitted from the light emitter is emitted from the exit surface, by measuring the rotation angle of the shaft using the amount of light detected by the photo sensor, durability and size can be improved compared to the mechanical angle measuring sensor.

Furthermore, the light emitting unit and the light receiving unit may be modularized, and the electrical interlocking method of the light emitting unit and the light receiving unit may be biased in one direction, thereby increasing the variety of miniaturization and utilization of the sensor unit. In addition, it is possible to improve the mass productivity of the light exit surface processing to improve the mass productivity of the sensor.

The present invention can be applied to a joint angle measuring sensor of a rehabilitation device and a robot, a sensor for a sports posture correcting device, a yoga model, a virtual reality application motion sensor, and an unrestrained motion sensor. It is possible to implement a low cost by satisfying the miniaturization and mass production, thereby increasing the utilization.

Hereinafter, an angle sensor using an optical fiber according to an embodiment of the present invention with reference to the accompanying drawings will be described in detail. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structures are shown in an enlarged scale than actual for clarity of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is an exploded perspective view showing an angle measuring sensor according to an embodiment of the present invention, Figure 2 is a perspective view showing the combined angle measuring sensor of Figure 1,

3 is a cross-sectional view of the measuring sensor of FIG. 2, and FIG. 4 is a cross-sectional view illustrating a state in which the measuring sensor of FIG. 3 is rotated by a predetermined angle with respect to the rotation axis.

1 to 4, the angle sensor using the optical fiber according to the exemplary embodiment of the present invention includes a first cover 100 and a light receiving unit 210 on which the light emitting unit 110 is supported, and a light receiving unit 210. One side of the light receiving unit 210 to be rotated so as to be rotatable about the connecting shaft 214 and the third cover 300 assembled with the first and second covers 100 and 200. ).

The first cover 100 fixes and covers the light emitting unit 110 by fitting, and connects and fixes the first reference ruler 400 based on one side for measuring an angle to the first groove 101. ) Is formed, and the lead unit 102 for transmitting and receiving electrical signals to the light emitting unit 110 and the light receiving unit 210 is formed. In addition, a light emitting unit groove 115 through which a line through which an electrical signal passes may be formed in the light receiving unit and the light emitting unit.

The second cover 200 has a first hole 301 is formed so that the connecting shaft 214 formed on one side of the light receiving unit 210 is rotatable, and as much as the area of the light receiving unit 210 rotates. A space is formed.

The light emitter 110 includes a light emitter 111 for generating light, a light emitter optical fiber 112 including a light exit surface 113 formed at a second end of the light emitter 111 and the first end of the light emitter 111, and The light emitting unit 111 and the light emitting unit includes a light emitting unit 114 for supporting the optical fiber 112. The light emitting unit 114 may include a light emitting unit groove 115 through which a light receiver 212 and a line that transmits and receives electrical signals to the light emitter 111 may pass.

The light exit surface 113 is advantageous if the light receiving portion 210 is formed to be inclined to the opposite side to the side that rotates a lot. That is, the light exit surface 113 may include an inclined surface cut to form a predetermined angle toward the light receiving unit 210. The angle at which the first inclined surface is cut may range from 20 degrees to 35 degrees. The light generated by the light emitter 111 is totally reflected when passing through the light emitting part optical fiber 112, and is emitted only to the light exit surface 113.

The light receiving unit 210 is installed to face the light exit surface 113 directly on the basis of the connecting shaft 214 to measure the light amount emitted from the light exit surface 113 and the light receiver (212) The light receiving member 213 may be fixed to the connection shaft 214 and the light receiving member 212 may be rotated based on the connection shaft 214. In addition, when there is a distance between the light receiver 212 and the light exit surface 113, a light receiving unit optical fiber 211 may be disposed between the light receiver and the light exit surface 113. The light receiver 212 for measuring the amount of light emitted from the light exit surface 113 may be a photo sensor. In addition, the connection shaft 214 connects the light receiving unit 210, the second cover 200, and the third cover 300. The roles of the cover may block the external light so that the light receiving unit detects only the light emitted from the light emitting unit purely, thereby increasing the accuracy of the measurement and at the same time improving the durability.

In addition, the connecting shaft 214 is formed with a second groove 215 connecting the second reference ruler 500 with respect to the second side for measuring the angle.

The angle measuring sensor may further include a third cover 300 attached to the first and second covers 100 and 200 to seal the light emitting unit 110 and the light receiving unit 210.

Thus, the amount of light emitted from the light exit surface 113 can be selectively absorbed to detect the amount of light. Therefore, when the light receiving unit 210 is rotated based on the connecting shaft 214, the amount of light is changed according to the rotation angle, and thus the angle can be simply calculated. The distance between the light exit surface 113 and the light receiver 212 when the straight line is 5mm is also possible, if the distance is far away can be solved by arranging the light receiving unit optical fiber 211. The separation distance is preferably determined in consideration of the diameter of the optical fiber 110, the amount of light generated from the light emitting body 111, the resolution of the light receiving body 212, the size of the angle measuring sensor and the like.

In this case, the factor affecting the accuracy in the manufacturing process of the angle sensor using the optical fiber is that the angle measuring sensor from mass production should emit the same amount of light at the same angle and receive the same amount of light. At this time, it is the light exit surface 113 that affects a lot. In mass production, the exit surface is cut at exactly the same slope, and the key point is that the cut slope is correctly mounted without being eccentric to the light emitting portion. The manufacturing method of the angle measuring sensor for mass production process, the step of attaching the light emitting member 111 to the light emitting member 114, one end is adjacent to the light emitting member 111 attached to the light emitting member 114. Inserting an optical fiber into the light emitting supporting part, fixing the light emitting supporting part 114 to a jig and forming a light emitting surface 113 at a predetermined angle to manufacture the light emitting part 110, the light emitting part 110. ) Is positioned on the first cover 100, fixing the light receiving unit 210 to rotate in the first hole 301 formed in the second cover, the first cover 100 and the first 2, the light emitting unit 110 is fixed to the first cover 100 by fixing and sealing the cover 200, so that the light output surface 113 having a predetermined inclined surface can be mass-produced and uniform The inclined surface having an angle can be assembled so as not to be eccentric to the light-emitting supporting portion.

In addition, it is obvious that the same effect can be obtained even if the position of the light emitting unit 110 and the fixing and rotating roles of the light receiving unit 210 are reversed as described above.

5 is a perspective view illustrating a case worn on the joint of the angle measuring sensor of FIG. 2, and FIG. 6 is a perspective view showing a state in which a wireless communication module is mounted on the angle measuring sensor of FIG. 2. 5 is for attaching the first reference member 400 and the second reference ruler 500 to the first groove 101 and the second groove 215 of the angle sensor using the optical fiber and to measure the knee joint angle of the person It shows the case worn.

Here, since the angle sensor itself using the optical fiber is small, it is necessary to accurately grasp two target reference axes for easily measuring the angle. In this case, the reference having a linear component is the light emitting unit 110 axis or the light emitting unit 110. ) And the light receiving unit 210 which rotates relatively, and may be attached to each reference.

That is, the light receiving unit 210 is formed with a second groove 215 connecting the second reference ruler 500 with reference to the second side for measuring the angle, the second reference ruler 500 Is measured by combining the first reference unit 400 and the first groove 101 and the lead unit 102 formed in the first cover 100, the first reference unit 400 as shown in FIG. Can embed the wireless communication module function.

The wireless communication module includes a control unit 420, a power supply unit 410, and a communication unit 430. The control unit 420 controls power input to the light emitter 111 and is detected by the light receiver 212. By receiving and analyzing the amount of light to calculate the angle and transmit it to the outside in real time through the communication unit 430 it is possible to easily grasp the operation of bending the leg in real time.

Although the foregoing detailed description of the invention has been individually described with reference to preferred embodiments of the invention, those skilled in the art or having ordinary skill in the art will have the invention described in the following claims. It will be understood that various modifications and changes can be made in the present invention without departing from the spirit and scope of the invention.

According to the present invention, the circuit portion related to the light emitting portion and the light receiving portion can be configured only on one side of the light emitting portion or the light receiving portion representing one surface to measure the angle, so that the efficiency and utility of the sensor are increased, and the sensor for measuring the joint angle of the rehabilitation device and the robot It can be easily applied as a sensor for sports posture corrector, yoga, model, virtual reality application motion sensor and unrestricted motion sensor.

1 is an exploded perspective view showing an angle measuring sensor according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating the angle measuring sensor of FIG. 1 in combination.

3 is a cross-sectional view of the measuring sensor of FIG. 2.

4 is a cross-sectional view illustrating a state in which the measuring sensor of FIG. 3 is rotated by a predetermined angle with respect to the rotation axis.

5 is a perspective view illustrating an example of wearing on the joint of the angle measuring sensor of FIG. 2.

6 is a perspective view illustrating a state in which a wireless communication module is mounted on the angle measuring sensor of FIG. 2.

100: first cover 101: first groove

102: lead portion 110: light emitting portion 110

111 light emitter 112 light emitting unit 110 optical fiber

113: light exit surface 114: light emitting portion

115: light emitting portion groove 200: second cover

210: light receiver 211: light receiver

212: light receiving member 213: light receiving portion

214: connecting shaft 215: second groove

300: third cover 301: first hole

400: first reference element 410: power unit

420: control unit 430: communication unit

500: second standard

Claims

In the angle measuring sensor for measuring the angle using an optical fiber,

A light emitting unit including a light emitting unit configured to support an optical fiber including a light emitter for generating light and a light emitting surface formed at a first end and a second end for receiving light from the light emitter;

A light receiving unit disposed to correspond to the light emitting surface of the light emitting unit and configured to include a light receiving member receiving the emitted light and a light receiving supporting unit fixing the light receiving body;

A cover supporting the light emitting portion and the light receiving portion;

One of the light emitting unit and the light receiving unit is fixed to the cover and the other end is fixed to the cover so that the rotation is possible, the angle measuring sensor, characterized in that it has a connecting shaft capable of rotating movement corresponding to the other fixed .

The angle measuring sensor according to claim 1, wherein the connection shaft further has a structure capable of connecting a reference ruler that grasps an angle measuring target reference plane.

The angle measuring sensor of claim 1, wherein the light exit surface comprises a first inclined surface cut to form a predetermined angle in a first direction in which the light receiving unit rotates.

The angle measuring sensor of claim 1, wherein the cover is configured to seal the light emitting part and the light receiving part.

The angle measuring sensor of claim 4, wherein the second cover has a space corresponding to an area in which the light receiving unit rotates.

The angle measuring sensor of claim 1, wherein the light emitting portion and the portion electrically connected to the light receiving portion are biased on one surface of an object to measure an angle.

The angle measuring sensor of claim 1, wherein the light exit surface protrudes from the light emitting portion.

The angle measuring sensor of claim 1, wherein the light receiving unit further comprises a light receiving unit optical fiber.

According to claim 1, It is connected to the light receiving body and the light emitting body to control the power supply to the light emitting body receives the amount of light input from the light receiving body to analyze the angle to calculate the angle and transmit the measured data to the outside through the communication module Angle measuring sensor, characterized in that.

Attaching a light emitter to a light emitting support part, and inserting an optical fiber into the light emitting support part such that an end thereof is adjacent to a light emitter attached to the light emitting support part;

Manufacturing a light emitting part by fixing a light emitting support part to a jig and cutting the protruding optical fiber at a predetermined angle to form a light exit surface;

Positioning the light emitting part on a cover;

Attaching a light receiver to the light receiver and positioning the light receiver in the cover;

Fixing one of the light emitting part or the light receiving part to the cover;

Fixing the other one of the light emitting part or the light receiving part, which is not fixed, to the cover so as to be rotatable;

And sealing the cover for supporting the light emitting part and the light receiving part.