KR102164648B1 - Hydraulic cylinder motion detection device - Google Patents

Abstract

Disclosed is a hydraulic cylinder operation sensing apparatus provided to obtain the operation of a hydraulic cylinder in a hydraulic cylinder control system for confirming and controlling the position of a piston during the operation of the hydraulic cylinder. According to an embodiment of the present invention, the hydraulic cylinder operation sensing apparatus includes: an outer cover formed into a cylindrical shape incorporating a cylinder in order to protect the outer part of the piston and the cylinder constituting the hydraulic cylinder. The outer cover, in which a plurality of through holes are formed on a side and a plurality of protruding parts are formed on an inner surface with the same axis as the center axis of the outer cover, includes: a plurality of vertical fixing members inserted into the through holes to fix the cylinder by coming in contact with the outer part of the cylinder; and a plurality of horizontal fixing members formed to surround the cylinder so as to fix the cylinder by coming in contact with the outer part of the cylinder and the inner surface of the outer cover. The horizontal fixing members are formed into a cylindrical shape having a hollow inside, include a fixing groove of a predetermined depth formed one round on the lateral surface, and are combined with the protruding parts formed on the inner surface of the outer cover to fix a gap between the cylinder and the outer cover.

Description

Hydraulic cylinder motion detection device

The present invention relates to a hydraulic cylinder motion detection device, and more particularly, in a hydraulic cylinder control system for checking and controlling the position of a piston during an operation of a hydraulic cylinder, a hydraulic cylinder operation provided to obtain the operation of the hydraulic cylinder It relates to a sensing device.

In general, when a cylinder is used, a sensor for detecting the operating position is installed before and after the cylinder to detect the movement of the cylinder before and after, and the operating position of the detected cylinder by connecting a display device such as an LED with the sensor. Is notified to the user, or a data line connected to the sensor is input through the input contact point of the controller so that the user can grasp the operating position of the cylinder.

However, when a cylinder is installed in a part inside the facility where it is difficult to inspect the cylinder, even if an abnormality occurs in the operation of the cylinder, the current state of the cylinder is not accurately known, and the cylinder must be disassembled for inspection.

In order to prevent this, a control system can be provided that can maintain a constant state of the cylinder simply by checking the position of the piston during the operation of the cylinder and controlling it from the outside. For this purpose, even if various sensors are provided to measure the state of the cylinder, the sensor measures noise information due to environmental factors due to the operation of the cylinder or vibration of external machinery, so it is necessary to measure the state of the cylinder. Therefore, there is a problem in which errors may occur.

Unexamined Patent Publication No. 10-2006-0116106

The present invention was conceived to solve the above problems, and an object of the present invention is to obtain piston operation information, and at the same time, by acquiring the operation information of the cylinder together to confirm pure piston operation information and position information, It is to provide a hydraulic cylinder motion detection device to enable precise control.

Another object of the present invention is to reduce the maintenance cost and time of the device by using a sensing device that is easily detachable, and a hydraulic cylinder that can be applied to various working environments by attaching the sensing device in various ways according to the installation conditions of the hydraulic cylinder. It is to provide a motion detection device.

The subject of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A hydraulic cylinder motion detection apparatus according to an embodiment of the present invention for solving the above problem is to obtain operation information of the hydraulic cylinder in a hydraulic cylinder control system for controlling the position and control of the piston when the hydraulic cylinder is operated. A hydraulic cylinder motion detection device provided, comprising: a cylinder constituting the hydraulic cylinder and an outer shell formed in a cylindrical shape including the cylinder to protect the exterior of the piston, wherein the outer shell includes a plurality of through holes on a side surface. A plurality of vertical fixing members having a plurality of protrusions formed on an inner surface thereof and having the same axis as the central axis of the outer shell, and being inserted into the through hole to contact the outside of the cylinder to fix the cylinder; And a plurality of horizontal fixing members formed to surround the cylinder so as to fix the cylinder in contact with the inner surface of the outer shell and the outside of the cylinder, wherein the horizontal fixing member is formed in a hollow cylindrical shape, and a side surface A fixing groove having a predetermined depth for one rotation is provided, and is formed to fix between the shell and the cylinder by engaging with the protrusion formed on the inner surface of the shell.

A piston motion measuring unit formed to be coupled to the piston, and obtaining piston motion information obtained by measuring the position of the piston; And a cylinder motion measurement unit configured to be coupled to the cylinder to obtain cylinder motion information measuring the motion of the cylinder, wherein the piston motion measurement unit generates an electromagnetic wave to measure the motion of the piston or A piston motion measurement module formed to include a plurality of electromagnetic wave measurement members or a plurality of first acceleration measurement members to measure the first acceleration; And a piston coupling module provided to couple the piston motion measuring module to the piston, wherein the piston motion measuring module uses the emission and acquisition time of the electromagnetic wave when the electromagnetic wave measuring member is included. Thus, the piston operation information is obtained, and when the first acceleration measurement member is included, the piston operation information is obtained by using a change time of the piston acceleration as the first acceleration, and the piston coupling module It is formed of one magnetic member or a plurality of first insertion members, the first magnetic member is formed to be coupled with the piston using magnetic force, and the first insertion member is inserted into a perforation of a predetermined depth formed in the piston Is formed to be coupled to the piston using frictional force, and the electromagnetic wave measuring member is coupled to the front surface of the piston using the piston coupling module to emit and acquire the electromagnetic wave in a direction facing the front surface of the piston. The first acceleration measurement member is formed to measure an electromagnetic wave, and the first acceleration measurement member is coupled to a front surface or a side surface of the piston using the piston coupling module to measure the first acceleration generated in the forward and backward motion of the piston, and the The cylinder motion measurement unit includes: a cylinder motion measurement module formed to include a plurality of second acceleration measurement members to measure a second acceleration to measure a motion of the cylinder or to measure a shake; And a cylinder coupling module provided to couple the cylinder motion measurement module to the cylinder, wherein the cylinder motion measurement module is provided inside or outside the cylinder, and the cylinder acceleration as the second acceleration By measuring the change in, the cylinder operation information is obtained, and the cylinder coupling module is formed of any one of a plurality of second magnetic members, a plurality of adhesive members, or a plurality of second insertion members, and the second magnetic member is , The second insertion member is formed to be coupled to the cylinder using magnetic force, and the second insertion member is inserted into a perforation of a predetermined depth formed in the cylinder to be coupled to the cylinder using frictional force, and the adhesive member is the cylinder Is bonded using Velcro formed on the outside of the cylinder, the cylinder motion measurement module is coupled using the second insertion member when coupled to the inside of the cylinder, and when coupled to the outside of the cylinder, the second Noise is generated by processing the piston motion information and the cylinder motion information, which are coupled using any one of a magnetic member, the adhesive member, or the second insertion member, and obtained from the piston motion measuring unit and the cylinder motion measuring unit, respectively. A noise processing unit for acquiring the position of the piston in the removed hydraulic cylinder; further comprising, the noise processing unit is formed outside the cylinder, and receives power from the outside to measure the piston motion and the It may be formed to be electrically connected to the piston motion measurement unit and the cylinder motion measurement unit to supply the power to the cylinder motion measurement unit.

A first power supply terminal electrically connected to the noise processing unit and formed in the cylinder; And a second power supply terminal formed outside the piston to be electrically connected to the first power supply terminal, wherein the first power supply terminal and the second power supply terminal have a predetermined length, and the second power supply terminal It may further include an auxiliary capacitor for storing the power obtained while the first power supply terminal and the second power supply terminal are electrically connected.

According to an embodiment of the present invention, by acquiring piston motion information and acquiring cylinder motion information at the same time, it is possible to perform precise control of the piston by confirming pure piston motion information and position information.

In addition, the present invention can reduce the maintenance cost and time of the device by using a sensing device that is easily detachable.

In addition, the present invention can be applied to various working environments by attaching the sensing device in various ways according to the installation condition of the hydraulic cylinder.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present invention.

1 is a view showing an external appearance of a hydraulic cylinder motion detection apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the hydraulic cylinder motion detection device of FIG. 1 taken along an AB plane.
3 is an enlarged view of a piston motion measuring unit in a hydraulic cylinder motion sensing device according to an embodiment of the present invention.
4 is an enlarged view of a cylinder motion measurement unit of a hydraulic cylinder motion detection apparatus according to an embodiment of the present invention.
FIG. 5 is a diagram schematically illustrating a structure for supplying power between a cylinder motion measurement unit and a piston motion measurement unit in a hydraulic cylinder motion detection apparatus according to an embodiment of the present invention.
6 is a cross-sectional view of a hydraulic cylinder motion detection apparatus according to an embodiment of the present invention in which an outer skin is coupled to a hydraulic cylinder in parallel with a central axis.
7 is a top view and (b) a side perspective view of (a) the outer shell of the hydraulic cylinder motion detection apparatus according to an embodiment of the present invention.
8 is a (a) perspective view and (b) a side view of a horizontal fixing member according to an embodiment of the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described in this specification may be variously modified. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the accompanying drawings are only intended to facilitate understanding of various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it is to be understood as including all equivalents or substitutes included in the spirit and scope of the invention.

Terms including ordinal numbers such as first and second may be used to describe various elements, but these elements are not limited by the above-described terms. The above-described terms are used only for the purpose of distinguishing one component from other components.

In the present specification, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance. When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Meanwhile, a "module" or "unit" for a component used in the present specification performs at least one function or operation. In addition, the "module" or "unit" may perform a function or operation by hardware, software, or a combination of hardware and software. In addition, a plurality of "modules" or a plurality of "units" excluding "module" or "unit" to be performed in specific hardware or performed by at least one processor may be integrated into at least one module. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In addition, in describing the present invention, when 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 abbreviated or omitted.

1 is a diagram showing an external appearance of a hydraulic cylinder motion detection apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the hydraulic cylinder motion detection apparatus of FIG. 1 cut along an AB plane, and FIG. 3 is an implementation of the present invention. It is an enlarged view of a piston motion measurement part of the hydraulic cylinder motion detection apparatus according to an example, FIG. 4 is an enlarged view of a cylinder motion measurement part of the hydraulic cylinder motion detection apparatus according to an embodiment of the present invention, and FIG. 5 is an embodiment of the present invention. A schematic diagram showing a structure for supplying power between the cylinder motion measurement unit and the piston motion measurement unit among the hydraulic cylinder motion detection apparatuses according to the present invention, and FIG. 6 is a diagram showing the outer shell of the hydraulic cylinder motion detection apparatus according to an embodiment of the present invention. The combined state is a cross-sectional view cut parallel to the central axis, and FIG. 7 is a top view and (b) a side perspective view of a hydraulic cylinder motion detection device according to an embodiment of the present invention, and FIG. 8 is an embodiment of the present invention. (A) a perspective view and (b) a side view of the horizontal fixing member according to.

Hereinafter, the hydraulic cylinder motion detection apparatus of the present invention will be described in detail with reference to FIGS. 1 to 8.

1 is a view showing an external appearance of a hydraulic cylinder motion detection apparatus according to an embodiment of the present invention.

The hydraulic cylinder motion detection device 130 of the present invention may be used as a part of a hydraulic cylinder control system for checking and controlling the position of the piston 110 when the hydraulic cylinder is operated, in which case the operation information of the hydraulic cylinder is obtained. Can be installed for

Referring to FIG. 1, the hydraulic cylinder motion detection device 130 may be formed such that the piston 110 is coupled to a general hydraulic cylinder 100 reciprocating the inside of the cylinder 120.

Referring to FIG. 2, which is a cross-sectional view taken along the AB surface of FIG. 1 in order to examine the present invention in more detail, the hydraulic cylinder motion detection device 130 according to an embodiment of the present invention includes a piston motion formed on the piston 110. It is formed to include a measurement unit 210 and a cylinder motion measurement unit 220 formed in the cylinder 120.

The piston motion measurement unit 210 is coupled to the piston 110 and is formed to obtain piston motion information for measuring the motion and position of the piston.

To this end, the piston motion measurement unit 210 may be formed to include a piston motion measurement module 311 and a piston coupling module 313 as shown in FIG. 3.

Referring to FIG. 3, the piston motion measuring unit 210 is partially spaced apart and shown to be coupled with the piston 110, but this is exaggerated for the purpose of explanation, and is actually spaced apart so as not to cause problems in the operation of the hydraulic cylinder. It is obvious that the parts are combined so that they do not exist.

The piston motion measurement module 311 is provided to obtain piston motion information by measuring the motion of the piston 110. At this time, the piston motion measurement module 311 may measure the movement of the piston 110 using an electromagnetic wave, or may measure the movement of the piston 110 using the acceleration of the piston 110.

The piston motion measurement module 311 may be formed to include an electromagnetic wave measurement member 311A in order to measure the movement of the piston 110 using electromagnetic waves.

At least one electromagnetic wave measuring member 311A may be coupled to one surface of the piston 110. The electromagnetic wave measuring member 311A is preferably coupled to the front surface of the piston 110 as shown in FIG. 3 to emit an electromagnetic wave in the direction C viewed from the front of the piston 110, and the return electromagnetic wave (D ) Can be formed to obtain.

The electromagnetic wave measuring member 311A emits electromagnetic waves in the C direction, acquires the electromagnetic waves reflected and returns in the D direction, and then measures the time taken until the electromagnetic waves are reflected and returned to the cylinder 120 of the piston 110 You can check your current location inside.

The electromagnetic wave measuring member 311A may measure the electromagnetic wave repeatedly at regular time intervals according to the user's setting to obtain the position of the piston 110 discontinuously, or continuously measure the electromagnetic wave to obtain the position of the piston 110 Can also be acquired continuously.

At this time, in order to continuously obtain the position of the piston 110, the electromagnetic wave measuring member 311A may match the emitted electromagnetic wave and the reflected electromagnetic wave by changing the wavelength of the emitted electromagnetic wave and transmitting it.

A plurality of electromagnetic wave measuring members 311A may be formed, and when a plurality of electromagnetic wave measuring members 311A are formed, the average of the time taken by each electromagnetic wave measuring member 311A may be used as piston operation information.

In addition, the piston motion measurement module 311 may be formed to include first acceleration measuring members 311B and 311C to measure the motion of the piston 110 using acceleration.

The first acceleration measuring members 311B and 311C may be coupled to a side surface of the piston 110 to measure a first acceleration generated by the movement of the piston 110. The first acceleration measuring members 311B and 311C are when the piston 110 starts to move into the cylinder 120, when the piston 110 stops inside the cylinder 120, the piston 110 is the cylinder 120 ) When starting to move to the outside, and when the piston 110 stops outside the cylinder 120 can be classified as the first acceleration measurement result.

Referring to FIG. 3, when the piston 110 first starts to move into the cylinder 120 in FIG. 3, the first acceleration acts in the C direction. Accordingly, the first acceleration measuring members 311B and 311C may determine that the piston 110 has started to move at the moment when the first acceleration in the C direction starts to act.

Next, when the piston 110 stops inside the cylinder 120, the first acceleration acts in the D direction for deceleration of the piston 110. Accordingly, the first acceleration measuring members 311B and 311C may determine that the piston 110 has stopped moving at the moment when the first acceleration in the D direction becomes 0.

When the piston 110 moves outside the cylinder 120, the opposite is true, and the first acceleration measuring members 311B and 311C measure the first acceleration to obtain piston operation information.

Briefly explaining one example, the first acceleration measurement members 311B and 311C are, when the piston 110 moves in the C direction and stops, the time at which the first acceleration in the C direction is measured, the first acceleration in the C direction. Acquire the time when the acceleration measurement ends, the time at which the first acceleration in the D direction is measured, and the time at which the measurement of the first acceleration in the D direction ends, and use the obtained time and the magnitude of the first acceleration to perform a constant acceleration motion. The distance traveled by the piston can also be used as piston motion information by applying it to the formula and the acceleration motion formula.

On the other hand, the piston motion measurement module 311 according to an embodiment of the present invention may use a piston coupling module 313 to couple with the piston 110, and the piston coupling module 313 is a first insertion member It may be formed of (313A, 313B) or a first magnetic member (313C).

The first insertion members 313A and 313B are inserted into the piston 110 and are formed to couple the piston motion measurement modules 311A and 311B with the piston 110 using frictional force. The first insertion members 313A and 313B are inserted into a perforation formed in the piston 110 to a predetermined depth, and may be formed in the form of a male screw, for example.

Further, the first magnetic member 313C is formed to couple the piston motion measurement module 311C with the piston 110 by using magnetic force on the piston 110. The difference between these members may be selectively utilized so as not to interfere with the operation of the hydraulic cylinder 100, and it is possible to ensure ease of repair and installation with a structure that is easily detachable.

That is, in the example of FIG. 3, in the case of the electromagnetic wave measuring member 311A installed on the front surface of the piston 110 among the piston motion measurement modules 311, it is preferable that the front surface of the piston 110 is installed flat. The first acceleration measuring members 313B and 313C may be coupled to the front surface of the piston 110 using the first insertion member 313A, and the first acceleration measuring members 313B and 313C coupled to the side surfaces of the piston 110 are hydraulic cylinders ( Since the position does not interfere with the operation of the 100), the first insertion member 313B or the first magnetic member 313C may be selectively used.

Meanwhile, the cylinder motion measurement unit 220 is formed to obtain cylinder motion information obtained by measuring the motion of the cylinder 120 by being coupled to the cylinder 120. This is to remove noise included in the measurement result by the above-described piston motion measurement unit 210 due to movement of the hydraulic cylinder 100 itself or external vibration.

To this end, the cylinder motion measurement unit 220 may be selectively formed inside or outside the cylinder 120 as shown in FIG. 2, and as shown in FIG. 4, the cylinder motion measurement module 411 and the cylinder It may be formed to include a coupling module 413.

Referring to FIG. 4, the cylinder motion measurement module 411 is provided to obtain cylinder motion information by measuring the motion of the cylinder 411. At this time, the cylinder motion measurement module 311 may be formed as a second acceleration measurement member to measure irregular external vibrations and motions generated during the operation of the hydraulic cylinder 100.

The second acceleration measurement member 411 is formed to measure the movement of the cylinder 120 and may measure a second acceleration generated by the movement of the cylinder 120. Since movement caused by noise generally acts irregularly, acceleration is generated with irregular directions and intensity. The second acceleration measuring member 411 may acquire the irregular second acceleration generated in three dimensions as the cylinder motion information.

On the other hand, the cylinder motion measurement module 411 according to an embodiment of the present invention may use a cylinder coupling module 413 to couple with the cylinder 120, and the cylinder coupling module 413 is a second insertion member ( 413A), the second magnetic member 413B may be formed of a bonding member 413C.

The second insertion member 413A is inserted into the cylinder 120 as shown in FIG. 4A and is formed to couple the cylinder motion measurement module 411 with the cylinder 120 using frictional force. The second insertion member 413A is inserted into a perforation formed in the cylinder 120 to a predetermined depth, and may be formed in the form of a male screw, for example.

The second magnetic member 413B is formed to couple the cylinder motion measurement module 411 to the cylinder 120 using magnetic force as shown in FIG. 4B, and the adhesive member 413C is as shown in FIG. 4C. Likewise, it is formed to adhere the cylinder motion measurement module 411 to the cylinder 120 and may be preferably formed in a Velcro shape.

Here, FIGS. 4B and 4C show a form in which the second magnetic member and the adhesive member of the present invention are in contact with a narrow area and a large area to explain that they can be coupled to the cylinder 120 in various forms. The second magnetic member of the present invention is not necessarily selectively coupled to only a small area, and the adhesive member is not necessarily coupled to a wide shape.

At this time, when the cylinder motion measurement module 411 is formed to be coupled to the inside of the cylinder 120, the cylinder motion measurement module 411 is formed to be coupled to the cylinder 120 using the second insertion member 413A. The second magnetic member 413B and the adhesive member 413C are preferably not used. This is because when the piston 110 reciprocates within the hydraulic cylinder 100, the presence of a protruding portion interferes with the operation of the hydraulic cylinder 100.

However, although not shown in the drawings of the present invention, in the case of using the second magnetic member and the adhesive member in a form that creates a perforation inside the cylinder and does not protrude into the generated perforation, it does not interfere with the operation of the hydraulic cylinder. It can be sufficiently included in the present invention.

In addition, when the cylinder motion measurement module 411 is formed to be coupled to the outside of the cylinder 120, since it does not interfere with the operation of the piston 110 inside the cylinder 120, various types of cylinder coupling members 413 Can be used.

Meanwhile, the hydraulic cylinder motion detection apparatus 130 according to an embodiment of the present invention may further include a noise processing unit (not shown) outside the cylinder 120. The noise processing unit is connected to the piston operation measurement unit 210 and the cylinder operation measurement unit 230 through wired or wireless communication, and obtains piston operation information and cylinder operation information from each.

The noise processing unit performs processing to exclude cylinder motion information from the obtained piston motion information, and can generate motion processing information from which noise is removed as a result of the processing, and to external users through wired or wireless communication using a communication member. Operation processing information can also be provided.

In addition, the noise processing unit may be formed to receive electric power from the outside and supply electric power to the piston motion measurement unit 210 and the cylinder motion measurement unit 230.

Here, the cylinder motion measuring unit 230 can be easily electrically connected to the noise processing unit through a simple circuit, but since the piston motion measuring unit 210 is installed on the piston 110, there is a problem that it is difficult to be electrically connected easily. .

Therefore, in order to solve this, referring to FIG. 5, the hydraulic cylinder motion detection device 130 of the present invention includes a first power supply terminal 510 formed in the cylinder 120 and the piston 110. It may further include an auxiliary capacitor connected to the second power supply terminal 520 and the second power supply terminal 520 formed outside through an electric circuit and installed.

5, a first power supply terminal 510 is formed on the inner surface of the cylinder 120 to have a predetermined length. The first power supply terminal 510 has a circuit connected to the noise processing unit in order to receive power from an external noise processing unit.

Meanwhile, the second power supply terminal 520 formed on the piston 110 is formed to have a predetermined length and is formed on the side of the piston 110 so as to contact the first power supply terminal 510.

In FIG. 5, the distance at which the piston 110 reciprocates may be within the length of the first power supply terminal 510 (E) or other than the length of the first power supply terminal 510 (F).

If the reciprocating motion of the piston 110 is performed only within a certain length of the first power supply terminal 510, the second power supply terminal 520 always contacts the first power supply terminal, thereby receiving power from the noise processing unit. It can be supplied constantly.

However, as soon as the piston 110 exceeds the length of the first power supply terminal 510, the contact is stopped, and the power supply is stopped at the same time, and the supply of power to the piston motion measurement unit 210 is also stopped. .

Accordingly, in an embodiment of the present invention, in order to solve this problem, the auxiliary capacitor 530 is further provided on the side of the piston 110 and a circuit is configured to be electrically connected to the second power supply terminal 520. Through this, extra power always exists in the auxiliary capacitor 530, and when the power is cut off at the moment when the piston 110 deviates from the E path to the F path, the piston motion measurement unit 210 in the auxiliary capacitor 530 naturally ), it is possible to prevent the supply of power to the piston motion measurement unit 210 from being stopped.

Meanwhile, the hydraulic cylinder motion detection device 130 according to an embodiment of the present invention may be formed to further include a cylindrical outer shell 610 containing the hydraulic cylinder 100 as shown in the cross-sectional view of FIG. 6. have.

The outer shell 610 is formed in a cylindrical shape with an empty inside, the hydraulic cylinder 100 is inserted therein, and various fixing members are included to fix the hydraulic cylinder 100 to minimize noise.

A plurality of through-holes 620 may be formed on the side surface of the shell 610. The plurality of through holes 620 is formed as a passage into which the vertical fixing member 621 can be inserted, and the vertical fixing member 621 passes through the through hole 620 so that the cylinder 120 and the lower surface are in contact with each other. The cylinder 120 can be firmly fixed to the shell 610. To this end, the plurality of through-holes 620 may be preferably formed to be spaced apart at the same angle so that an equal force can act on the same circumference with respect to the central axis of the outer shell 610.

That is, if three through-holes 620 exist on the same circumference, each through-hole 620 is formed to form 120 degrees, and if four through-holes 620 exist, each through-hole 620 The angle between) may be formed at 90 degrees.

In addition, since the vertical fixing member 621 has a thread formed on the outside and is inserted so as to mesh with the thread inside the through hole 620, the possibility of being separated due to strong vibration can be reduced.

On the other hand, Figure 7 briefly shows the inner shape of the shell according to an embodiment of the present invention. Figure 7a is a cross-sectional plan view of the outer skin perpendicular to the central axis, Figure 7b is a side perspective view of the outer shell.

7A and 7B illustrate a state in which the protrusion 710 is formed on the inner surface of the outer shell 610. A plurality of protrusions 710 are formed on the inner surface of the outer shell 610. The protrusion 710 is preferably formed in a ring shape by protruding a circumference having the same axis as the central axis of the outer shell 610 to the same height.

To explain more easily, the protrusion 710 is formed in a donut shape on the inner surface of the outer shell 610, and the outer surface of the donut may be said to be in contact with the outer shell 610. Therefore, a plurality of ring-shaped protrusions 710 formed perpendicular to the central axis are present on the inner surface of the outer shell 610, which is the outer shell 610 and the cylinder 120 using a horizontal fixing member 800 to be described later. It is formed to make the bond of

8 is a (a) perspective view and (b) a side view of a horizontal fixing member according to an embodiment of the present invention. The horizontal fixing member 800 according to the exemplary embodiment of the present invention is formed in a cylindrical shape with an empty inside, and has a groove with a predetermined width and depth in a circumference in a direction perpendicular to the central axis to form a shape similar to a skein.

These grooves are formed to couple with the protrusions 710 formed on the inner surface of the shell 610 described above. The cylinder 120 according to an embodiment of the present invention is formed to penetrate the empty interior of the horizontal fixing member 800, and the horizontal fixing member 800 has an inner surface in contact with the cylinder 120 and at the same time By coupling the groove of the protrusion 710, the cylinder 120 and the outer shell 610 may be more rigidly fixed horizontally.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications are possible by those skilled in the art of course, and these modifications should not be individually understood from the technical idea or perspective of the present invention.

100. Hydraulic cylinder
110. Piston
120. Cylinder
130. Hydraulic cylinder motion detection device
210. Piston motion measurement unit
220. Cylinder motion measurement unit
311. Piston motion measurement module
311A. Electromagnetic wave measurement member
311B, 311C. First acceleration measurement member
313. Piston coupling module
313A, 313B. First insertion member
313C. No first magnetic force
411. Cylinder motion measurement module/second acceleration measurement member
413. Cylinder combination module
413A. 2nd insertion member
413B. Absence of second magnetic force
413C. Adhesive member
510. First power supply terminal
520. Second power supply terminal
530. Auxiliary Capacitor
610. Sheath
620. Through hole
621. Vertical fixing member
710: protrusion
800: horizontal fixing member

Claims (2)

In the hydraulic cylinder motion detection device provided to obtain operation information of the hydraulic cylinder in a hydraulic cylinder control system for controlling the position and control of the piston during operation of the hydraulic cylinder,
Includes; a cylinder constituting the hydraulic cylinder and a cylindrical shell containing the cylinder to protect the exterior of the piston;
The outer shell,
A plurality of through holes are formed on the side surfaces, and a plurality of protrusions having the same axis as the central axis of the outer shell are formed on the inner surface,
A plurality of vertical fixing members inserted into the through holes to contact the outside of the cylinder to fix the cylinder; And
Includes; a plurality of horizontal fixing members formed to surround the cylinder so as to fix the cylinder in contact with the inner surface of the shell and the outside of the cylinder,
The horizontal fixing member is formed in a cylindrical shape with an empty inside, has a fixing groove having a predetermined depth to rotate one side, and is formed to fix between the shell and the cylinder by combining with the protrusion formed on the inner surface of the shell. And
A piston motion measuring unit formed to be coupled to the piston, and obtaining piston motion information obtained by measuring the position of the piston; And
Further comprising a; cylinder motion measurement unit formed to be coupled to the cylinder to obtain cylinder motion information measuring the motion of the cylinder,
The piston motion measurement unit,
A piston motion measurement module formed to include a plurality of electromagnetic wave measurement members or a plurality of first acceleration measurement members to generate an electromagnetic wave to measure the movement of the piston or to measure a first acceleration; And
A piston coupling module provided to couple the piston motion measurement module to the piston; and
The piston motion measurement module,
In the case of including the electromagnetic wave measuring member, the piston operation information is obtained using the emission and acquisition time of the electromagnetic wave,
In the case of including the first acceleration measurement member, the piston operation information is obtained using a change time of the piston acceleration, which is the first acceleration,
The piston coupling module is formed of a plurality of first magnetic members or a plurality of first insertion members,
The first magnetic force member is formed to be coupled to the piston using magnetic force, and the first insertion member is inserted into a perforation of a predetermined depth formed in the piston to be coupled to the piston using frictional force,
The electromagnetic wave measuring member is coupled to a front surface of the piston using the piston coupling module to emit and acquire the electromagnetic wave in a direction facing the front surface of the piston to measure the electromagnetic wave,
The first acceleration measurement member is formed to measure the first acceleration generated in the front and rear motion of the piston by being coupled to the front or side of the piston using the piston coupling module,
The cylinder motion measurement unit,
A cylinder motion measurement module configured to include a plurality of second acceleration measurement members to measure a second acceleration to measure motion of the cylinder or to measure a shake; And
Is formed to include; a cylinder coupling module provided to couple the cylinder motion measurement module to the cylinder,
The cylinder motion measurement module, provided inside or outside the cylinder, measures a change in the cylinder acceleration, which is the second acceleration, to obtain the cylinder motion information,
The cylinder coupling module is formed of any one of a plurality of second magnetic members, a plurality of adhesive members, or a plurality of second insertion members,
The second magnetic member is formed to be coupled to the cylinder using magnetic force, and the second insertion member is inserted into a perforation of a predetermined depth formed in the cylinder to be coupled to the cylinder using frictional force, The adhesive member is adhered using Velcro formed on the outside of the cylinder,
The cylinder motion measurement module,
When coupled to the inside of the cylinder, it is coupled using the second insertion member, and when coupled to the outside of the cylinder, it is coupled using any one of the second magnetic member, the adhesive member, or the second insertion member Become,
A noise processing unit configured to process the piston operation information and the cylinder operation information respectively obtained by the piston operation measurement unit and the cylinder operation measurement unit to obtain a position of the piston in the hydraulic cylinder from which noise is removed; Includes,
The noise processing unit is formed outside the cylinder and is electrically connected to the piston motion measurement unit and the cylinder motion measurement unit to supply the power to the piston motion measurement unit and the cylinder motion measurement unit by receiving power from the outside. Hydraulic cylinder motion detection device formed to be. delete

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