CN203323920U - Intelligent verification system for pressure-type thermometer - Google Patents
Intelligent verification system for pressure-type thermometer Download PDFInfo
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- CN203323920U CN203323920U CN2013202363706U CN201320236370U CN203323920U CN 203323920 U CN203323920 U CN 203323920U CN 2013202363706 U CN2013202363706 U CN 2013202363706U CN 201320236370 U CN201320236370 U CN 201320236370U CN 203323920 U CN203323920 U CN 203323920U
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Abstract
Disclosed is an intelligent verification system for a pressure-type thermometer, and the verification system comprises a mechanical part, a control part, a constant-temperature oil groove, and a camera, wherein the mechanical part comprises a basis platform, a mechanical arm, and a transmission mechanism, and the control part comprises a main control computer, a motion control unit, an operating unit, a data station unit, and a data collecting card. An automatic verification process of the intelligent verification system comprises steps of: automatically searching a meter, automatically setting the meter, reading configuration information, automatically detecting, automatically analyzing and processing, and the like. The intelligent verification system can be used for intelligently verifying a plurality of pressure-type thermometers at the same time, and, meanwhile, can be used for a thermal simulation test of a winding thermometer. During verification, manual intervention is not required, so as to improve work efficiency of verification, save manpower, and protect the physical and mental health of a tester from being damaged.
Description
Technical field
The utility model relates to the automatic Verification of the transformer temperature measuring equipment of electric system, is the pressure-type thermometer Intelligent calibration system specifically.
Background technology
In electric system; pressure-type thermometer is called again temperature controller; not only for the temperature of measuring transformer; also relation the functions such as transformer cooler self-starting, strong oily circulating transformer refrigeratory full cut-off protection, the high warning of temperature, and its operational reliability and measuring accuracy are directly connected to the safety and stablization of electric system.The operational reliability of pressure-type thermometer, measuring accuracy and its calibration operation have close ties.At present, the calibrating of pressure-type thermometer generally adopts total man's work calibration method, and verification process is loaded down with trivial details, workload is large, the safety responsibility weight, needs 2 professional's non-stop runs within 8 hours, just can complete the calibration operation of separate unit pressure-type thermometer.Along with the electrical network high speed development, transformer station's quantity sharply increases in recent years, and the quantity of pressure-type thermometer also is geometric growth, causes the contradiction of the in short supply and workload of personnel between large.Simultaneously, traditional calibration method exists owing to manually estimating and reads and can't guarantee the problem of data precision larger gauging error may occur, affects measuring accuracy.In addition, in checking procedure, when temperature is elevated to 100-150 ℃, verification medium (transformer oil) can volatilize a large amount of harmful carcinogenic gas, and the physical and mental health of testing crew is caused to very big harm.Therefore, traditional pressure-type thermometer calibration method can't meet current need of work.
China utility model new patent ZL201220355017.5 has announced the full-automatic verification system of a kind of pressure-type thermometer, and a kind of full-automatic calibrating scheme of pressure-type thermometer is provided.But this system can not be examined and determine many pressure-type thermometers simultaneously, calibration operation efficiency is not high; And in verification process, the step that electric contact is examined and determine and the change number of delivering letters is examined and determine is still needed to manual intervention, intelligent degree still remains to be improved.
The utility model content
The purpose of this utility model is to provide a kind of pressure-type thermometer Intelligent calibration system, and this system can be carried out the intellectuality calibrating to many pressure-type thermometers simultaneously, can also carry out thermal modeling test to winding temperature gage simultaneously.Do not need to carry out manual intervention in verification process, to improve calibration operation efficiency, save manpower, avoid the physical and mental health of testing crew is caused damage.
The technical solution of the utility model is as follows: a kind of pressure-type thermometer Intelligent calibration system comprises mechanical part, control section, thermostatic oil bath and camera.
Mechanical part comprises basic platform, mechanical arm and gear train; Basic platform comprise vertically be fixed on base 1 for hanging up the plane hanger 2 of constant-pressure formula thermometer to be checked more than; Mechanical arm comprises girder X3, is fixed in brace summer Y1, the Y2 of girder X3 and is fixed on line slide rail X1, the X2 on brace summer Y1, Y2, and line slide rail X1, X2 are level and are parallel to the plane that hangs up of plane hanger 2; Mechanical arm is by being fixed on slide block Z12 on brace summer Y1, Y2 and being connected on plane hanger 2 through sliding guide Z1, Z2, Z3, the Z4 of slide block Z12; Gear train comprises transverse movement servomotor X11, X21 and slip The Cloud Terrace S1, the S2 be arranged on line slide rail X1, X2, also comprise move up and down servomotor Z01 and ball screw Z0, transverse movement servomotor X11, X21 are connected to slip The Cloud Terrace S1, S2 by Timing Belt, the servomotor Z01 that moves up and down is connected to ball screw Z0 by shaft coupling, and ball screw nut is fixed on girder X3 by web joint Z02.
Control section comprises main control computer, motion control unit, operating unit, data station unit and an above data collecting card, motion control unit is connected to the control end of main control computer and transverse movement servomotor X11, X21 and the servomotor Z01 that moves up and down, operating unit is connected to main control computer, the data station unit is connected to main control computer, each data collecting card one end is connected to the data station unit, and the other end is connected to a pressure-type thermometer to be detected.Wherein, being constructed as follows of motion control unit: comprise Servo Control Board and motion control card, Servo Control Board is connected to motion control card by photo-coupler, and motion control card is connected to main control computer; Servo Control Board also is connected to the control end of transverse movement servomotor X11, X21 and the servomotor Z01 that moves up and down by photo-coupler.Also comprise the second electronic hand wheel, the second electronic hand wheel is connected to described motion control card by photo-coupler, and is connected to described operating unit.
The control end of thermostatic oil bath is connected to the data station unit, and the temperature-sensitive bag of constant-pressure formula thermometer to be checked is placed in thermostatic oil bath.
Camera is fixed on slip The Cloud Terrace S1, S2 and is connected to main control computer, and cam lens is over against constant-pressure formula thermometer to be checked.
For winding temperature gage is carried out to thermal modeling test, also be provided with current source, the control end of current source is connected to the data station unit.
The automatic Verification process of above-mentioned Intelligent calibration system is as follows:
Step 1, automatic seeking table: the dollying head, automatically on identification and Judge plane hanger, whether each epi-position position hangs and remains detected pressures formula thermometer, and records the epi-position state;
Step 3, read configuration information: reading out data from configuration file arranges the range of this calibrating, basic calibration points, the type of selected remote transfer signal;
Step 4, detection automatically:
Sending controling instruction is to thermostatic oil bath, and the minimum temperature that oil sump temperature is set from range is warming up to the maximum temperature that range is set gradually; Between temperature raising period, gather and record every detection data, specifically have: Real-time Collection and the temperature value that records thermostatic oil bath; The dollying head, gather the dial plate image of pressure-type thermometer to be detected on each epi-position successively, and identification and record pointer are indicated automatically; By capture card Real-time Collection remote transfer signal value record; Real-time Collection and record the contact working value;
Sending controling instruction is to thermostatic oil bath, and the maximum temperature that oil sump temperature is set from range is cooled to the minimum temperature that range is set gradually; Between cooldown period, gather and record every detection data, specifically have: Real-time Collection and the temperature value that records thermostatic oil bath; The dollying head, gather the dial plate image of pressure-type thermometer to be detected on each epi-position successively, and identification and record pointer are indicated automatically; By capture card Real-time Collection remote transfer signal value record; Real-time Collection and record the contact working value;
Step 5, data analysis are processed: analyze data, for each pressure-type thermometer, fill in fundamental error table, the contact table of adjusting, draw temperature rise curve figure, the generation probation redport.
The calibrating of pressure-type thermometer mainly comprises basic calibration points, remote transfer signal value and the calibrating of contact working value.For basic calibration points, adopting image recognition technology automatically to identify the dial needle indication, by Real-time Collection electric current or resistance signal, is to adopt the method for Real-time Collection contact state realize calibrating for the contact working value for the remote transfer signal value.At first hang up the constant-pressure formula thermometer to be checked more than at basic platform, main control computer is according to trace routine, sending steering order slowly heats up or cooling thermostatic oil bath, during this period, main control computer is controlled gear train by motion control unit, the driving mechanical arm The Cloud Terrace transverse shifting that moves up and down and slide, make to be fixed on the dial plate image of the camera automatic pressure acquisition formula thermometer on the slip The Cloud Terrace.After the dial plate image is input to main control computer, utilize image recognition technology, automatically identify the dial needle indication.Main control computer is controlled the data station unit simultaneously and is gathered current signal in pressure-type thermometer make and break contact working value, remote transfer signal or resistance signal etc. by data collecting card.For carrying out data analysis relatively, the data station unit also needs the temperature of Real-time Collection thermostatic oil bath.For the thermal modeling test of winding type thermometer, the data station unit also gathers current source data.The data analysis of main control computer to collecting, realize the automatic Verification of pressure-type thermometer.
The technique effect that the utility model is obtained is: realized many pressure-type thermometers are carried out to unattended intelligent verification simultaneously, greatly improved work efficiency, saved manpower.Former artificial calibrating needs a pressure-type thermometer of two testing crew continuous firings ability calibrating in 8 hours, adopts the utility model, only needs can examine and determine many pressure-type thermometers in 4 hours.Testing crew only need hang pressure-type thermometer to be detected, connects required circuit, starts calibrating procedure and gets final product.Do not need manual intervention in verification process, the injury of having avoided gas that the calibrating Medium Oil volatilizees when high temperature to cause the testing crew physical and mental health.The application image recognition technology is identified dial needle indication automatically, has also avoided the Traditional Man calibrating to read and can't guarantee the problem of data precision to have improved measuring accuracy owing to manually estimating.The utility model can also carry out thermal modeling test to winding temperature gage, has increased actual range of application.
The accompanying drawing explanation
Fig. 1 is system construction drawing.
The structural representation that Fig. 2 is basic platform.
The structural representation that Fig. 3 is mechanical arm and gear train.
The schematic diagram that Fig. 4 is control section.
Fig. 5 is the automatic Verification process flow diagram.
Fig. 6 is the fundamental error table of system output.
Fig. 7 is the contact of the system output table of adjusting.
Fig. 8 is the temperature rise curve figure that system is drawn.
Embodiment
Basic platform as shown in Figure 2, adopts pyramid structure, and this structure has the advantages such as stability is strong, reliable firmly, flexible adjustment.In order to guarantee the rigidity requirement, material adopts aluminium section bar, the high-strength aluminum alloy that the trade mark is 6063.The basic platform single face can hang simultaneously, 4 temperature controllers of verification, about 1520mm; The average height of the design considerations testing crew of height according to the 1600mm design, need to raise mechanical arm to avoid breaking camera while temperature controller being installed, therefore height overall is 2000mm simultaneously; Width design is determined according to the diameter of inner cabling and balance bob, is 1000mm.Basic platform adopts Open architecture up and down, facilitates the equipment coolings such as driver, forceful electric power and weak current part.The aluminium alloy material of assembling plane hanger adopts the dovetail groove design, easy to assembly, flexible adjustment, be convenient to fastening, combination in conjunction with the secondary structure part, facilitate installation, the application of dissimilar equipment, compare traditional hanger have install firm, assembling and dissembling speed is fast, the advantages such as secondary connection security height, can meet the installation requirement of dissimilar thermometer.
As shown in Figure 3, the action form of mechanical arm is cartesian co-ordinate type for mechanical arm and gear train, can on three mutually perpendicular directions, do the linear telescopic motion, and the motion of three directions of mechanical arm is independently, and calculating and control ratio are more convenient.Mechanical arm adopts gantry structure, facilitates the installation of thermometer to be convenient to camera simultaneously and focuses.The width foundation of mechanical arm is the focal length of camera.The number of degrees of freedom, of native system is 3, is respectively three independent, direction along X1, X2, Z0, along the side-to-side movement of slide rail X1 and X2 and moving up and down along ball screw Z0.Respectively there are 4 thermometers on the worktable two sides, and the servomotor on X1, X2 slide rail is connected respectively to mobile The Cloud Terrace S1, S2 with Timing Belt, drives camera and carries out transversal scanning, every 5 seconds run-downs.When the fitting temperature timing need to move to top by mechanical arm, after assembling, move down mechanical arm and stop to the home position of thermometer card.Gear train is converted into the straight line elevating movement of vertical direction and the left and right translation motion of horizontal direction by the uniform velocity unidirectional gyration of servomotor.The straight line elevating movement of vertical direction adopts ball leading screw driving, and rectilinear motion is changed in the motion of screw mandrel turning handle rotation, and for the hi-Fix apart from shorter, motor only is connected with shaft coupling with ball screw, very close to each other.Adopt ball screw to mainly contain following consideration: 1, high-precision assurance, Intelligent calibration system is high to accuracy requirement, reach 0.2 grade, higher than the precision of desk checking, the ball screw assembly, that system adopts is to produce with the plant equipment of the highest level in the world of Japan's manufacture is coherent far away.2, the assurance of micro-feeding, the ball screw assembly, that native system adopts, owing to being to utilize ball moving, can guarantee to realize accurate micro-feeding.
As Fig. 4, main control computer consists of industrial control mainboard.Motion control unit MCU mainly comprises motion control card and Servo Control Board, wherein motion control card adopts DMC1380, DMC1380 is the pci bus pulsed motion control card that aims at Design of Motion Control Chip, can carry out a position motion control for three AC servo motor of native system.The DMC1380 card includes pulse and direction interface, and its position command can be exported by single channel pulse (pulse+direction) or two-way pulse (CW+CCW pulse) mode, can be that the differential type output circuit can be also the monofocal output circuit.Native system is selected two-way mode, differential type output circuit.In addition, except universal input output signal interface, DMC1380 also comprises the special signal interfaces such as initial point, spacing, deceleration, has plug and play, characteristics such as simple and easy, reliable and stable, the low price of programming, and meets the control requirement of native system.Operating unit OPU mainly comprises man-machine interaction panel and the second electronic hand wheel, the data interaction of common realization and main control computer and motion control unit.Data station cells D SU is responsible for the collection of general data, comprises the data of three parts: 1, pressure-type thermometer make and break contact working value, also comprise current signal or the resistance signal of remote transfer signal value, and these data are by the data collecting card collection; 2, the real time temperature of thermostatic oil bath; 3, the current value of current source.Camera is connected to industrial control mainboard by USB interface, is directly carried out collection and the processing of image by industrial control mainboard.
Power supply is the power that the assurance system runs well, and native system is respectively thermostatic oil bath FLUKE-7320, control section, current source by the first transformer 220V voltage is provided; Provide the 24V working power for pressure-type thermometer simultaneously.The second transformer is isolating transformer, and for three motors provide 220V voltage, using isolating transformer is for the harmonic wave in better electric insulation filtering simultaneously voltage etc., for motor provides more stable voltage.
As shown in Figure 5, concrete verification process is:
Hang up the constant-pressure formula thermometer to be checked more than at basic platform, under the control of program, at first carry out the automatic seeking table, control gear train by motion control unit, the driving mechanical arm The Cloud Terrace transverse shifting that moves up and down and slide, make to be fixed on each epi-position on the camera automatic search plane hanger on the slip The Cloud Terrace, and image is passed to main control computer, judge on each epi-position and whether hung pressure-type thermometer to be detected, record the epi-position state.
Next carries out automatic his-and-hers watches, to control gear train by motion control unit equally, the driving mechanical arm The Cloud Terrace transverse shifting that moves up and down and slide, the camera that makes to be fixed on the slip The Cloud Terrace is registered to the dial plate center that has hung pressure-type thermometer to be detected successively, records coordinate position.
Then read configuration information, main control computer is read the configuration information of this detection from configuration file, comprises the type of range, basic calibration points and remote transfer signal etc.
Enter afterwards detection-phase.Advanced active line detects, and by main control computer, issues instructions to thermostatic oil bath, and the minimum temperature that oil sump temperature is set from range is warmed up to the maximum temperature that range sets gradually.In the oil groove temperature-rise period, motion control unit is controlled gear train, every 5 seconds, is the dollying head, press the coordinate position of precedence record, is registered to successively the dial plate of all pressure-type thermometers to be detected, the dial plate image of collection pressure-type thermometer.For seeking the epi-position that does not hang pressure-type thermometer be recorded in the table process, skip and do not gather.After the dial plate image collected is input to main control computer, utilize image recognition technology, the dial needle indication is identified and recorded to main control computer automatically.In the oil groove temperature-rise period, data station unit Real-time Collection and record the temperature of oil groove, and by the capture card Real-time Collection with record the remote transfer signal value, Real-time Collection and record the contact working value.Then carry out the flyback detection, by main control computer, issue instructions to thermostatic oil bath, the maximum temperature that oil sump temperature is set from range cools to the minimum temperature that range sets gradually.Between the flyback detection period, gather and every data of record and trace detection period between the same.
Finally carry out analysis and the processing of data, for each pressure-type thermometer, fill in fundamental error table, the contact table of adjusting, draw temperature rise curve figure, generate probation redport.
Calibrating for winding temperature gage, Intelligent calibration system can also carry out thermal modeling test in completing the process of above-mentioned calibrating simultaneously, concrete grammar is: main control computer calculates specified mutual inductor CT electric current according to specified transformer capacity, electric pressure, then tables look-up and draw the heating current of specified copper oil temperature under poor according to built-in temperature rise curve.Thereby specified mutual inductor CT electric current is exported in automatic control electric stream source, after the adaptation of winding temperature controller, exports heating current, and the analogue copper oil temperature is poor.
Systematic technical indicator is as follows:
1, basic specification:
The maximum temperature controller of verification simultaneously quantity: 8,2 models (install on minute two sides);
Temperature controller mounting means: at right angle setting;
Thermostatic oil bath quantity: 2(standard configuration model FLUKE-7320);
Temperature controller remote transfer signal measuring accuracy: 0.2%;
The temperature controller remote transfer signal is measured non-linear :≤0.2%;
The temperature controller make and break contact sampling time: 500ms;
Temperature controller dial pointer position minimum resolution: 0.5o.
2, rating of machine:
Complete machine weight: 460kg (not containing thermostatic oil bath);
Complete machine size: 2100 * 1000 * 2150 mm (length * wide * height);
Mechanical arm stroke: X1, X2 axle 1350mm; Z axis 450mm;
Mechanical arm bears a heavy burden :≤1.5kg;
Camera translational speed: X-axis 300mm/s (max); Z axis 200mm/s (max).
3, electrical specification:
Operating voltage: three-phase AC380V/50Hz;
Maximum consumption power: 3KW.
Claims (4)
1. a pressure-type thermometer Intelligent calibration system, is characterized in that, comprises mechanical part, control section, thermostatic oil bath and camera;
Described mechanical part comprises basic platform, mechanical arm and gear train; Basic platform comprise vertically be fixed on base (1) for hanging up the plane hanger (2) of constant-pressure formula thermometer to be checked more than; Mechanical arm comprises girder (X3), is fixed in the brace summer of girder (X3) (Y1, Y2) and is fixed on the line slide rail (X1, X2) on brace summer (Y1, Y2), and line slide rail (X1, X2) is level and is parallel to the plane that hangs up of plane hanger (2); Described mechanical arm is by being fixed on slide block (Z12) on brace summer (Y1, Y2) and being connected on described plane hanger (2) through the sliding guide (Z1, Z2, Z3, Z4) of slide block (Z12); Gear train comprises transverse movement servomotor (X11, X21) and the slip The Cloud Terrace (S1, S2) be arranged on line slide rail (X1, X2), also comprise the servomotor that moves up and down (Z01) and ball screw (Z0), transverse movement servomotor (X11, X21) is connected to slip The Cloud Terrace (S1, S2) by Timing Belt, the servomotor (Z01) that moves up and down is connected to ball screw (Z0) by shaft coupling, and ball screw nut is fixed on girder (X3) by web joint (Z02);
Described control section comprises main control computer, motion control unit, operating unit, data station unit and an above data collecting card, motion control unit is connected to the control end of main control computer and described transverse movement servomotor (X11, X21) and the servomotor that moves up and down (Z01), operating unit is connected to main control computer, the data station unit is connected to main control computer, each data collecting card one end is connected to the data station unit, and the other end is connected to a pressure-type thermometer to be detected;
The control end of described thermostatic oil bath is connected to described data station unit, and the temperature-sensitive bag of constant-pressure formula thermometer to be checked is placed in thermostatic oil bath;
Described camera is fixed on described slip The Cloud Terrace (S1, S2) and is connected to described main control computer, and cam lens is over against constant-pressure formula thermometer to be checked.
2. pressure-type thermometer Intelligent calibration system as claimed in claim 1, it is characterized in that, described motion control unit comprises Servo Control Board and motion control card, and Servo Control Board is connected to motion control card by photo-coupler, and motion control card is connected to main control computer; Servo Control Board also is connected to the control end of transverse movement servomotor (X11, X21) and the servomotor that moves up and down (Z01) by photo-coupler; Also comprise the second electronic hand wheel, the second electronic hand wheel is connected to described motion control card by photo-coupler, and is connected to described operating unit.
3. pressure-type thermometer Intelligent calibration system as claimed in claim 2, is characterized in that, described motion control card model is DMC1380, and the thermostatic oil bath model is FLUKE-7320.
4. pressure-type thermometer Intelligent calibration system as claimed in claim 1, is characterized in that, also comprises current source, and the control end of current source is connected to described data station unit.
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| CN2013202363706U CN203323920U (en) | 2013-05-03 | 2013-05-03 | Intelligent verification system for pressure-type thermometer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278263A (en) * | 2013-05-03 | 2013-09-04 | 国家电网公司 | Intelligent verification system of pressure type thermometers |
| CN106813807A (en) * | 2017-01-05 | 2017-06-09 | 中国科学院上海光学精密机械研究所 | The test device and method of testing of temperature sensor uniformity |
| CN109708780A (en) * | 2018-12-24 | 2019-05-03 | 长沙丰灼通讯科技有限公司 | A kind of high-precision fiducial temperature acquisition device and its method |
| CN111930104A (en) * | 2020-08-18 | 2020-11-13 | 云南电网有限责任公司德宏供电局 | Portable temperature controller checking system based on oil groove |
-
2013
- 2013-05-03 CN CN2013202363706U patent/CN203323920U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278263A (en) * | 2013-05-03 | 2013-09-04 | 国家电网公司 | Intelligent verification system of pressure type thermometers |
| CN103278263B (en) * | 2013-05-03 | 2016-12-28 | 国家电网公司 | Pressure-type thermometer Intelligent calibration system |
| CN106813807A (en) * | 2017-01-05 | 2017-06-09 | 中国科学院上海光学精密机械研究所 | The test device and method of testing of temperature sensor uniformity |
| CN109708780A (en) * | 2018-12-24 | 2019-05-03 | 长沙丰灼通讯科技有限公司 | A kind of high-precision fiducial temperature acquisition device and its method |
| CN109708780B (en) * | 2018-12-24 | 2020-09-29 | 长沙丰灼通讯科技有限公司 | High-precision reference temperature acquisition device and method thereof |
| CN111930104A (en) * | 2020-08-18 | 2020-11-13 | 云南电网有限责任公司德宏供电局 | Portable temperature controller checking system based on oil groove |
| CN111930104B (en) * | 2020-08-18 | 2023-02-03 | 云南电网有限责任公司德宏供电局 | Portable temperature controller checking system based on oil groove |
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