KR20140081456A - Apparatus and method for diagnosing initial imperfection of hydraulic system - Google Patents
Apparatus and method for diagnosing initial imperfection of hydraulic system Download PDFInfo
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- KR20140081456A KR20140081456A KR1020120151228A KR20120151228A KR20140081456A KR 20140081456 A KR20140081456 A KR 20140081456A KR 1020120151228 A KR1020120151228 A KR 1020120151228A KR 20120151228 A KR20120151228 A KR 20120151228A KR 20140081456 A KR20140081456 A KR 20140081456A
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- temperature
- hydraulic
- management reference
- initial
- reference temperature
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000007547 defect Effects 0.000 claims abstract description 74
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000003745 diagnosis Methods 0.000 claims description 15
- 238000001931 thermography Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010921 in-depth analysis Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/857—Monitoring of fluid pressure systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Radiation Pyrometers (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
The present invention relates to an apparatus and method for diagnosing an initial defect of a hydraulic system, and more particularly, to a system and method for diagnosing an initial defect of a hydraulic system by detecting a temperature change caused by initial defects of various hydraulic apparatuses And an initial defect diagnosis apparatus and method.
A hydraulic device (or a hydraulic system) is a device that generates a force by applying hydraulic pressure to a working fluid. If there is a problem in the behavior of a fluid flowing inside the device, it is impossible to visually check the fluid, There are disadvantages. As a result, if a hydraulic equipment failure occurs, it leads to a sudden stoppage of production.
On the other hand, typical hydraulic apparatuses that are likely to generate abnormal heat include a hydraulic pump, a hydraulic valve, an accumulator, a cooler, and an actuator.
In particular, the abnormal heat generation of the hydraulic pump is caused by the mechanical friction, the pump start setting deviation, and the like, leading to premature deterioration of the hydraulic pump and deteriorating the performance of the working fluid due to the temperature rise.
In the case of hydraulic valves, internal leakage may occur due to the internal wear of the relief valve which mainly sets the system pressure, the pressure adjusting screw loosening, the pressure setting error, etc., Which may be a waste of energy.
The accumulator is a device for supplementing the hydraulic pulsation absorbing and working fluid. In the case of the bladder type, the bladder often can not perform its function as it tears. Since this phenomenon can not be judged visually by the naked eye like other hydraulic devices, it is judged whether there is a defect by comparing the temperature between the bladder and the working fluid filling part.
Thus, a device for predicting and diagnosing initial defects in various hydraulic devices has not been introduced to date, and is entirely dependent on the five senses of the facility manager only. Therefore, there is an urgent need to develop an apparatus and method for quickly and accurately realizing the diagnosis of the initial defect of the hydraulic apparatus.
The present invention provides an apparatus and method for diagnosing a hydraulic device initial defect, which enables a worker to predict the occurrence of an initial defect in a hydraulic device by detecting a temperature change caused by an initial defect of various hydraulic apparatuses under load. It is the task to be done.
The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here can be clearly understood by those skilled in the art from the following description.
According to an embodiment of the present invention, there is provided an image forming apparatus comprising: thermal imaging means for photographing thermal image information of an operating hydraulic apparatus to detect temperature; A signal converter for converting the photographed thermal image information into an electronic signal; A data processor receiving data of the detected temperature converted into the electronic signal and determining whether an initial defect has occurred in the hydraulic system through comparison with a predetermined management reference temperature; And a monitoring server for receiving a result of the determination by the data processing unit and allowing a user to monitor the monitoring server; And an initial defect diagnosis device for diagnosing a hydraulic device initial defect.
The data processing unit performs a magnitude comparison between the detected temperature and the management reference temperature. When the detected temperature has a value equal to or higher than the management reference temperature, it is determined that an initial defect of the hydraulic system has occurred, And an alarm alarm module for notifying an alarm.
The monitoring server may further include a log unit for recording and storing the determination result of the data processing unit in a database, wherein the database is reflected when the management reference temperature is reset to tend to manage the temperature distribution of the hydraulic device.
According to an embodiment of the present invention, there is provided a control method for a hydraulic control apparatus, A detected temperature acquisition step of capturing thermal image information of the hydraulic apparatus under load operation to detect the temperature; A temperature comparison step of performing a magnitude comparison between the detected temperature and the management reference temperature; An initial defect determination step of determining, in the temperature comparison step, that an initial defect has occurred in the hydraulic apparatus when the detected temperature has a value equal to or higher than the management reference temperature; And an alarm notification step of notifying an alarm of the user to the terminal when it is determined that an initial fault has occurred in the hydraulic apparatus; And an initial defect diagnosis method for the hydraulic device.
Further, a temperature distribution tendency management step of recording and storing the results of the initial defect determination step into a database and managing the temperature distribution tendency of the hydraulic apparatus by reflecting the database when the management reference temperature is set in the management reference temperature setting step .
According to an embodiment of the present invention, it is possible to quickly detect the initial defects of the hydraulic apparatus to a worker by detecting a temperature change caused by initial defects of various hydraulic apparatuses under load. Thereby, the operator can quickly and accurately predict the occurrence of initial defects of the hydraulic apparatus.
In particular, when a problem such as an initial defect occurs in the hydraulic apparatus, temperature information emitted by the apparatus itself is quickly and accurately detected through the thermal imaging camera. Then, the detected temperature information is transmitted to the wireless terminal of the worker.
As a result, the conventional method which relied on the knowledge and experience of the operator is eliminated, and the initial defects and failures of the hydraulic device can be predicted without manual operation.
As a result, it is possible to prevent an equipment failure of the hydraulic equipment and to prevent the sudden stoppage of production, thereby improving the productivity.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view schematically showing a basic structure of a hydraulic device to which the present invention can be applied; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]
3 is a block diagram schematically illustrating a hydraulic device initial defect diagnosis apparatus according to an embodiment of the present invention.
4 is a flowchart of a method of diagnosing an initial fault of a hydraulic device according to an embodiment of the present invention.
The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor shall appropriately define the concept of the term in order to describe its invention in the best way It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.
Before explaining the configuration of an initial defect diagnosis apparatus using thermal image information according to an embodiment of the present invention, a basic structure of a hydraulic system will be briefly described with reference to FIG.
As shown in the figure, a typical hydraulic system includes a hydraulic tank 1, a
Accordingly, the apparatus and method for initial diagnosis of a hydraulic device according to an embodiment of the present invention are capable of detecting initial defects of the hydraulic apparatus based on the result of in-depth analysis of self-discharge temperature when there is a problem in the hydraulic apparatus, And to promptly inform the user thereof.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
3 is a block diagram schematically showing a hydraulic device initial defect diagnosis apparatus according to an embodiment of the present invention. Referring to FIG. 2, a block diagram of an initial defect diagnosis apparatus for a hydraulic system according to an embodiment of the present invention is shown. .
2 and 3, the hydraulic device initial defect diagnosis apparatus 100 includes a thermal imaging means 110 for taking thermal image information of a hydraulic apparatus, a signal for converting thermal image information into an electronic signal
The thermal imaging means 110 senses the overall temperature change of the hydraulic system H and provides thermographic information I. Specifically, an apparatus having the name 'Infrared Thermal Camera' can be used. In the case of various hydraulic apparatuses operated by a load, infrared radiation is emitted by itself, and this infrared ray energy is a device for photographing in the form of a thermal image, that is, 'thermal image information (I)'.
The hydraulic device H shown in FIG. 2 is an example of an accumulator, which is a hydraulic device that absorbs hydraulic pressure pulsation and monitors the working fluid. In the case of an accumulator (particularly, a bladder type), the bladder often fails to perform its function as it tears. However, since these defects can not be judged by the naked eye, it is difficult to predict the initial defects. Accordingly, the thermal image information I for the accumulator under operation as the load, that is, the hydraulic device H is photographed by using the thermal image pickup means 110 to detect thermal changes such as initial defects .
2, the thermal image pickup means 110 may be disposed at a position capable of detecting the temperature distribution on the front surface of the hydraulic device H, which is a subject, The thermal image information I is converted into an electronic signal by the
The
Here, the management reference temperature can be selected in consideration of the temperature characteristics preliminarily secured for each hydraulic device H through the experiments conducted or the theories derived therefrom. That is, when the temperature of the hydraulic device H becomes equal to or higher than a predetermined value, it corresponds to a reference temperature value that can be determined that an initial defect has occurred in the hydraulic device H.
The
The
The alarm alarm module 135 is responsible for notifying the
Here, the
If it is determined through the
That is, the information on the occurrence of the initial defect of the hydraulic pressure device determined by the
The
Referring to FIG. 3, various data or information related to the initial defect diagnosis of the hydraulic system may be transmitted through the
That is, the thermal image information converted into the electronic signal can be transmitted to the user's terminal 170 in the form of time information using the wire or wireless communication method, and the alarm signal can be transmitted from the
4 is a flowchart of a method of diagnosing an initial defect of a hydraulic system according to an embodiment of the present invention. Hereinafter, a method of diagnosing initial defects of a hydraulic device will be described.
In the management reference temperature setting step (S100)
This step is a step of setting a management reference temperature at the time of determination of occurrence of an initial defect of the hydraulic system. The 'management reference temperature T0' in this step is a temperature value that can be determined according to a temperature characteristic preliminarily secured to a hydraulic device (for example, an accumulator) through a preliminary experiment or a hydraulic theory derived therefrom Or range. That is, when the temperature (or temperature distribution) of the hydraulic device becomes equal to or greater than a predetermined value, it corresponds to a reference temperature value that can be judged that an initial defect has occurred in the hydraulic apparatus.
The detection temperature obtaining step (S200)
This step is a step of detecting the temperature (or the temperature distribution) by photographing thermal image information of the hydraulic apparatus under load operation. The acquisition of the thermal image information at this stage can be performed using a thermal imaging camera.
In the case of various hydraulic devices, when operating under a load, predetermined infrared energy is emitted by itself in accordance with the pressure characteristic of the working fluid, and the temperature change can be sensed by photographing such infrared energy in the form of thermal image information. That is, the detection temperature T1 can be secured in real time.
In the temperature comparison step S300 and the initial defect determination step S400,
This step compares the detected temperature T1 obtained in the previous step with a predetermined management reference temperature T0.
In other words, at this stage, a comparison between the detected temperature T1 and the management reference temperature T0 is performed. As a result, if the detected temperature T1 is not higher than the management reference temperature T0 (T1 <T0 And a case where the detected temperature T1 has a value equal to or greater than the management reference temperature T0 (T1? T0).
If the detected temperature T1 is not higher than the management reference temperature T0, it is determined that the initial defect does not appear in the hydraulic system, and the previous step S200 is repeated to continuously detect the thermal image information .
Conversely, when the detected temperature T1 has a value equal to or higher than the management reference temperature T0, it is determined that an abnormal state including an initial defect has occurred in the hydraulic apparatus at the next step S400.
The alarm notification step (S500)
In this step, when it is determined that the initial failure has occurred in the hydraulic apparatus in the previous step, the step of notifying the alarm to the user's terminal (e.g., smart phone) using the wired or wireless communication to be. Through these steps, the user can quickly and accurately predict the initial defects of the hydraulic device without risking access to the hydraulic device.
According to an exemplary embodiment of the present invention, the method may further include a temperature distribution trend management step (S600).
The temperature distribution trend management step (S600)
The temperature distribution tendency management step, which is the present step, is a step of controlling the temperature distribution tendency management step of obtaining the result of the initial defect occurrence diagnosis task of the hydraulic apparatus (that is, , Management reference temperature, initial defect determination result, etc.) are integrated and managed in a more systematic manner. By recording, classifying, and storing the above results in a database, it is possible to diagnose the initial defects of the hydraulic device more effectively by reflecting the database when the management reference temperature is set.
As described above, according to the embodiment of the present invention, it is possible to quickly detect the initial defects of the hydraulic apparatus to the operator by sensing a temperature change caused by initial defects of various hydraulic apparatuses under load.
Thereby, the operator can quickly and accurately predict the occurrence of initial defects of the hydraulic apparatus.
In particular, when a problem such as an initial defect occurs in the hydraulic apparatus, temperature information emitted by the apparatus itself is quickly and accurately detected through the thermal imaging camera.
Then, the detected temperature information is transmitted to the wireless terminal of the worker. As a result, the conventional method which relied on the knowledge and experience of the operator is eliminated, and the initial defects and failures of the hydraulic device can be predicted without manual operation.
Accordingly, it is possible to prevent an obstacle to the operation of the hydraulic equipment, thereby preventing the shutdown due to the sudden stoppage of production, thereby improving the productivity.
Hereinafter, an apparatus and method for diagnosing an initial defect of a hydraulic system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
It is to be understood that one embodiment of the invention described above is illustrative in all aspects and not restrictive. Further, the scope of the present invention shall be indicated by the following claims rather than the foregoing detailed description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
H: Hydraulic device
100: Hydraulic device initial defect diagnosis device
110: thermal imaging means
120: Signal conversion section
130:
150: Monitoring Server
160: Log section
170: User terminal
Claims (5)
A signal converter for converting the photographed thermal image information into an electronic signal;
A data processor receiving data of the detected temperature converted into the electronic signal and determining whether an initial defect has occurred in the hydraulic system through comparison with a predetermined management reference temperature; And
A monitoring server for receiving a result of the determination by the data processor and monitoring the user; Wherein the hydraulic device initial defect diagnosis device comprises:
Wherein the data processing unit comprises:
A temperature comparison module that performs a comparison between the detected temperature and the management reference temperature and determines whether the detected temperature has a value equal to or higher than a management reference temperature;
And an alarm alarm module that determines that an initial fault of the hydraulic device has occurred and notifies an alarm to the user's terminal when the detected temperature is equal to or higher than the management reference temperature.
The monitoring server may further include a log unit for recording and storing the determination result of the data processing unit in a database,
Wherein the database is reflected upon resetting of the management reference temperature so as to tend to manage the temperature distribution of the hydraulic apparatus.
A detected temperature acquisition step of capturing thermal image information of the hydraulic apparatus under load operation to detect the temperature;
A temperature comparison step of performing a magnitude comparison between the detected temperature and the management reference temperature;
An initial defect determination step of determining, in the temperature comparison step, that an initial defect has occurred in the hydraulic apparatus when the detected temperature has a value equal to or higher than the management reference temperature; And
An alarm notification step of notifying the user terminal of an alarm when it is determined that an initial fault has occurred in the hydraulic apparatus; Wherein the hydraulic device initial defect diagnosis method comprises the steps of:
A result of the initial defect determination step is recorded and stored in a database,
Further comprising a temperature distribution tendency management step of managing the temperature distribution tendency of the hydraulic apparatus by reflecting the database when the management reference temperature is set in the management reference temperature setting step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120151228A KR20140081456A (en) | 2012-12-21 | 2012-12-21 | Apparatus and method for diagnosing initial imperfection of hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120151228A KR20140081456A (en) | 2012-12-21 | 2012-12-21 | Apparatus and method for diagnosing initial imperfection of hydraulic system |
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| Publication Number | Publication Date |
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| KR20140081456A true KR20140081456A (en) | 2014-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020120151228A KR20140081456A (en) | 2012-12-21 | 2012-12-21 | Apparatus and method for diagnosing initial imperfection of hydraulic system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819144A (en) * | 2015-05-06 | 2015-08-05 | 中国石油天然气集团公司 | Method and device for detecting hydraulic pump fault in hydraulic system |
| KR102388775B1 (en) * | 2020-11-20 | 2022-04-20 | 주식회사 티에스피 | Hydraulic accumulator failure prediction diagnosis simulation system |
-
2012
- 2012-12-21 KR KR1020120151228A patent/KR20140081456A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819144A (en) * | 2015-05-06 | 2015-08-05 | 中国石油天然气集团公司 | Method and device for detecting hydraulic pump fault in hydraulic system |
| CN104819144B (en) * | 2015-05-06 | 2017-04-05 | 中国石油天然气集团公司 | The method and device of Hydraulic pump fault in a kind of detection hydraulic system |
| KR102388775B1 (en) * | 2020-11-20 | 2022-04-20 | 주식회사 티에스피 | Hydraulic accumulator failure prediction diagnosis simulation system |
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