KR20150122528A - Using a hydraulic linear actuator control system - Google Patents

Using a hydraulic linear actuator control system Download PDF

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Publication number
KR20150122528A
KR20150122528A KR1020140048908A KR20140048908A KR20150122528A KR 20150122528 A KR20150122528 A KR 20150122528A KR 1020140048908 A KR1020140048908 A KR 1020140048908A KR 20140048908 A KR20140048908 A KR 20140048908A KR 20150122528 A KR20150122528 A KR 20150122528A
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South Korea
Prior art keywords
piston
fluid
cylinder
actuator
pressure
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KR1020140048908A
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Korean (ko)
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정양근
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신라정보기술(주)
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Priority to KR1020140048908A priority Critical patent/KR20150122528A/en
Publication of KR20150122528A publication Critical patent/KR20150122528A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

The present invention relates to a hydraulic linear actuator control apparatus comprising: a cylinder having a fluid path; a piston moving forward inside the cylinder; an actuator including a piston rod combined with the piston; a hydraulic pump for supplying a fluid to the fluid path separated by the piston; a driving motor for driving the hydraulic pump; a location sensor for sensing the location of the piston; a pressure sensor for sensing the pressure of the fluid; and a control part for controlling the driving motor by receiving information obtained by the location sensor and the pressure sensor. The present invention has an effect of correctly and quickly obtaining information on an actuator.

Description

유압작동식 리니어 엑츄에이터 제어장치{USING A HYDRAULIC LINEAR ACTUATOR CONTROL SYSTEM}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydraulic actuating linear actuator control device,

본 발명은 유압작동식 리니어 엑츄에이터 제어장치에 관한 것이다.The present invention relates to a hydraulic actuating linear actuator control device.

유압작동식 리니어 엑츄에이터는 선형적으로 피스톤을 이동시켜 엑츄에이터를 구동한다. 이러한 엑츄에이터는 실린더 내의 피스톤에 위치센서가 부착되어 있으며, 위치센서를 통해 피스톤의 위치를 감지하여 그 정보가 제어부에 공급된다. 피스톤의 위치는 실린더 내의 유체가 흐르면 위치센서의 기어가 회전하고, 기어가 소정각도로 회전할 때마다 그 각도가 위치센서에 검출되어 제어부로 전송된다. 이러한 위치센서의 정보를 통해 제어부는 피스톤의 작동을 제어한다.A hydraulic actuating linear actuator linearly moves the piston to drive the actuator. In such an actuator, a position sensor is attached to the piston in the cylinder, and the position of the piston is sensed through the position sensor, and the information is supplied to the control unit. When the fluid in the cylinder flows, the gear of the position sensor rotates and the angle of the piston is detected by the position sensor and transmitted to the control unit whenever the gear rotates at a predetermined angle. Through the information of the position sensor, the control unit controls the operation of the piston.

하지만 이와 같은 종래의 위치센서를 구비한 엑츄에이터를 사용할 경우 엑츄에이터를 제어하기 위한 정보를 위치센서에서만 얻어야하기 때문에 정보 획득이 느리며 정보가 정확하지 못하는 문제점이 있다.However, when such an actuator having a position sensor is used, information for controlling the actuator must be obtained only from the position sensor, so that information acquisition is slow and information is not accurate.

따라서 본 발명의 목적은 엑츄에이터의 정보를 정확하고 빠르게 획득가능한 유압작동식 리니어 엑츄에이터 제어장치를 제공하는 것이다.SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a hydraulic actuating linear actuator control device capable of accurately and quickly obtaining information of an actuator.

상기한 목적은, 유체통로가 형성된 실린더와, 상기 실린더 내에서 선행이동하는 피스톤과, 상기 피스톤에 결합된 피스톤로드를 포함하는 엑츄에이터와; 상기 피스톤에 의해 격리된 상기 유체통로에 유체를 공급하는 유압펌프와; 상기 유압펌프를 구동하는 구동모터와; 상기 피스톤의 위치를 감지하는 위치센서와; 상기 유체의 압력을 감지하는 압력센서와; 상기 위치센서 및 상기 압력센서를 통해 획득한 정보를 전송받아 상기 구동모터를 제어하는 제어부를 포함하는 것을 특징으로 하는 유압작동식 리니어 엑츄에이터 제어장치에 의해 달성된다.The above-mentioned object is achieved by an actuator comprising: a cylinder having a fluid passage formed therein; a piston moving in advance in the cylinder; and an actuator including a piston rod coupled to the piston; A hydraulic pump for supplying fluid to the fluid passage isolated by the piston; A drive motor for driving the hydraulic pump; A position sensor for sensing a position of the piston; A pressure sensor for sensing a pressure of the fluid; And a control unit receiving the information obtained through the position sensor and the pressure sensor and controlling the driving motor.

상술한 본 발명의 구성에 따르면 복수의 센서를 이용하여 엑츄에이터의 정보를 정확하고 빠르게 획득가능한 효과를 제공한다.According to the configuration of the present invention described above, it is possible to accurately and quickly acquire the information of the actuator using a plurality of sensors.

도 1은 본 발명에 따른 유압작동식 리니어 엑츄에이터 제어장치의 도면이다.1 is a diagram of a hydraulic actuating linear actuator control apparatus according to the present invention.

이하 도면을 참고하여 본 발명의 유압작동식 리니어 엑츄에이터 제어장치를 상세히 설명한다.Hereinafter, a hydraulic actuating linear actuator control apparatus according to the present invention will be described in detail with reference to the drawings.

공작기계 등에 설치되는 엑츄에이터(10)는 실린더(11)와, 실린더(11) 내부에 설치된 피스톤(13)과, 피스톤(13)에 결합된 선형의 피스톤로드(15)를 포함한다. 실린더(11)의 내부에는 유체(1)가 존재하는 유체통로(17)가 형성되어 있으며, 유체통(17)로 내에는 피스톤(13)이 설치되어 있다. 유체통로(17) 내의 유체(1)가 부족할 경우 유체통로(17)와 연결된 유체탱크(20)에 저장된 유체(1)를 실린더(11)에 공급가능하다.An actuator 10 installed in a machine tool or the like includes a cylinder 11, a piston 13 provided inside the cylinder 11, and a linear piston rod 15 coupled to the piston 13. A fluid passage 17 in which the fluid 1 is present is formed in the cylinder 11 and a piston 13 is provided in the fluid passage 17. It is possible to supply the fluid 11 stored in the fluid tank 20 connected to the fluid passage 17 to the cylinder 11 when the fluid 1 in the fluid passage 17 is short.

피스톤(13)에 의해 유체통로(17)는 제1통로(17a) 및 제2통로(17b)로 구분된다. 제1통로(17a) 및 제2통로(17b)는 각각 유압펌프(30)에 연결되어 있으며 유압펌프(30)에 의해 각 통로(17a, 17b) 내의 유체(1) 압력이 조절된다. 이와 같은 제1통로(17a) 및 제2통로(17b) 내의 압력은 압력센서(40)를 통해 확인할 수 있다. 압력센서(40)는 제1통로(17a) 및 제2통로(17b)의 유체(1) 압력을 감지하는 센서로 실린더(11)에 설치되어 있다. 경우에 따라서 압력센서(40)는 유압펌프(30)에 설치될 수도 있다.The fluid passage 17 is divided by the piston 13 into a first passage 17a and a second passage 17b. The first passage 17a and the second passage 17b are connected to the hydraulic pump 30 and the pressure of the fluid 1 in each of the passages 17a and 17b is regulated by the hydraulic pump 30. [ The pressure in the first passage 17a and the second passage 17b can be confirmed through the pressure sensor 40. [ The pressure sensor 40 is installed in the cylinder 11 as a sensor for sensing the pressure of the fluid 1 in the first passage 17a and the second passage 17b. The pressure sensor 40 may be installed in the hydraulic pump 30 as occasion demands.

유압펌프(30)를 이용하여 유체(1)의 압력을 조절하면 유체통로(17) 내의 피스톤(13)의 위치가 압력에 의해 조절된다. 이와 같은 피스톤(13)의 위치는 실린더(11)에 설치된 위치센서(50)를 통해 확인할 수 있다.When the pressure of the fluid 1 is adjusted by using the hydraulic pump 30, the position of the piston 13 in the fluid passage 17 is controlled by the pressure. The position of the piston 13 can be confirmed by the position sensor 50 provided in the cylinder 11. [

압력센서(40)와 위치센서(50)를 통해 얻은 실린더(11)의 정보는 제어부(60)로 전송된다. 사용자는 실린더(11)를 제어하기 위해 원하는 실린더(11)의 작동 속도, 압력 및 위치 등과 같은 정보를 입력한다. 따라서 제어부(60)는 사용자가 입력한 정보와 압력센서(40) 및 위치센서(50)를 통해 얻은 엑츄에이터(10)의 정보를 이용하여 연산과정을 수행한다.The information of the cylinder 11 obtained through the pressure sensor 40 and the position sensor 50 is transmitted to the controller 60. The user inputs information such as the operating speed, pressure and position of the desired cylinder 11 to control the cylinder 11. [ Accordingly, the control unit 60 performs an operation process using the information input by the user and the information of the actuator 10 obtained through the pressure sensor 40 and the position sensor 50.

연산과정을 수행한 제어부(60)는 서보엠프(70)로 신호를 전달한다. 서보엠프(70)는 구동모터(80)와 결합되어 있으며, 제어부(60)에 의해 계산된 구동모터(80)의 회전 위치 정보를 받아 구동모터(80)의 회전 위치를 조절하는 역할을 한다. The control unit 60, which has performed the calculation process, transmits a signal to the servo amplifier 70. The servo amplifier 70 is coupled to the driving motor 80 and receives rotational position information of the driving motor 80 calculated by the controller 60 to adjust the rotational position of the driving motor 80.

구동모터(80)는 유압펌프(30)와 연결되어 있으며 유압펌프(30)를 구동시키는 역할을 한다. 또한 구동모터(80)는 전원을 공급하는 전원공급기(90)와 연결되어 있다. 여기서 구동모터(80)는 회전 위치 조절이 가능한 서보모터인 것이 바람직하다.The drive motor 80 is connected to the hydraulic pump 30 and serves to drive the hydraulic pump 30. The drive motor 80 is connected to a power supply 90 for supplying power. Here, the drive motor 80 is preferably a servomotor capable of adjusting the rotational position.

이와 같은 본 발명의 엑츄에이터 제어장치는 실린더(11) 내의 유체(1) 압력과 피스톤(13)의 동작을 통해 실린더(11)의 작동을 감지하는 압력센서(40) 및 위치센서(50)가 실린더(11)에 장착되어 있다. 압력센서(40) 및 위치센서(50)는 엑츄에이터(10)의 정보를 제어부(60)로 전송하게 되고, 사용자가 입력한 정보와 전송된 엑츄에이터(10)의 정보를 이용하여 제어부(60)는 피스톤(13)의 동작을 제어하기 위해 연산과정을 수행한다. 연산과정을 통해 얻은 정보는 서보엠프(70)로 전달되고 서보엠프(70)는 구동모터(80)의 회전 위치를 제어하게 된다. 구동모터(80)의 회전 위치를 통해 유압펌프(30)의 구동이 제어되며 이를 통해 엑츄에이터(10)의 동작이 제어된다. 이와 같은 제어과정들은 엑츄에이터(10)가 구동하는 동안 반복적으로 수행된다.The actuator control apparatus of the present invention is provided with a pressure sensor 40 and a position sensor 50 for sensing the operation of the cylinder 11 through the operation of the piston 13 and the pressure of the fluid 1 in the cylinder 11, (Not shown). The pressure sensor 40 and the position sensor 50 transmit the information of the actuator 10 to the controller 60. Using the information input by the user and the information of the actuator 10 transmitted from the controller 60, And performs an arithmetic operation to control the operation of the piston 13. The information obtained through the calculation process is transmitted to the servo amplifier 70, and the servo amplifier 70 controls the rotation position of the drive motor 80. The driving of the hydraulic pump 30 is controlled through the rotational position of the driving motor 80 and the operation of the actuator 10 is controlled through the control. Such control processes are repeatedly performed while the actuator 10 is being driven.

종래에는 엑츄에이터에 위치센서만 부착되어 있어 신호의 전달이 느리며, 위치센서의 신호에만 의존했기 때문에 엑츄에이터의 정보가 정확하지 않았다. 따라서 정확도를 요구하는 장비에는 종래의 발명이 적용되기 어려웠다.Conventionally, since only the position sensor is attached to the actuator, the signal transmission is slow, and the actuator information is inaccurate because it depends only on the signal of the position sensor. Therefore, the conventional invention has been difficult to apply to equipment that requires accuracy.

하지만 본 발명은 위치센서뿐(50)만 아니라 압력센서(40)를 함께 사용하여 정보의 정확도를 향상시킬 수 있으며, 신호의 전달 속도가 빨라진다.However, according to the present invention, not only the position sensor 50 but also the pressure sensor 40 can be used together to improve the accuracy of information, and the signal transmission speed is increased.

1: 유체 10: 엑츄에이터
11: 실린더 13: 피스톤
15: 피스톤로드 17: 유체통로
17a: 제1통로 17b: 제2통로
20: 유체탱크 30: 유압펌프
40: 압력센서 50: 위치센서
60: 제어부 70: 서보엠프
80: 구동모터 90: 전원공급기1: Fluid 10: Actuator
11: cylinder 13: piston
15: piston rod 17: fluid passage
17a: first passage 17b: second passage
20: Fluid tank 30: Hydraulic pump
40: pressure sensor 50: position sensor
60: Control section 70: Servo amplifier
80: drive motor 90: power supply

Claims (1)

유압작동식 리니어 엑츄에이터 제어장치에 있어서,
유체통로가 형성된 실린더와, 상기 실린더 내에서 선행이동하는 피스톤과, 상기 피스톤에 결합된 피스톤로드를 포함하는 엑츄에이터와;
상기 피스톤에 의해 격리된 상기 유체통로에 유체를 공급하는 유압펌프와;
상기 유압펌프를 구동하는 구동모터와;
상기 피스톤의 위치를 감지하는 위치센서와;
상기 유체의 압력을 감지하는 압력센서와;
상기 위치센서 및 상기 압력센서를 통해 획득한 정보를 전송받아 상기 구동모터를 제어하는 제어부를 포함하는 것을 특징으로 하는 유압작동식 리니어 엑츄에이터 제어장치.A hydraulic actuating linear actuator control apparatus comprising:
An actuator including a cylinder having a fluid passage formed therein, a piston moving in advance in the cylinder, and a piston rod coupled to the piston;
A hydraulic pump for supplying fluid to the fluid passage isolated by the piston;
A drive motor for driving the hydraulic pump;
A position sensor for sensing a position of the piston;
A pressure sensor for sensing a pressure of the fluid;
And a controller receiving the information obtained through the position sensor and the pressure sensor and controlling the drive motor.
KR1020140048908A 2014-04-23 2014-04-23 Using a hydraulic linear actuator control system KR20150122528A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180082228A (en) * 2017-01-10 2018-07-18 주식회사 에프알티 Smart actuator
KR20180082229A (en) * 2017-01-10 2018-07-18 주식회사 에프알티 Smart actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180082228A (en) * 2017-01-10 2018-07-18 주식회사 에프알티 Smart actuator
KR20180082229A (en) * 2017-01-10 2018-07-18 주식회사 에프알티 Smart actuator

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