CN2578816Y - Creep deformation measuring and automatic data collecting device - Google Patents
Creep deformation measuring and automatic data collecting device Download PDFInfo
- Publication number
- CN2578816Y CN2578816Y CN 02273979 CN02273979U CN2578816Y CN 2578816 Y CN2578816 Y CN 2578816Y CN 02273979 CN02273979 CN 02273979 CN 02273979 U CN02273979 U CN 02273979U CN 2578816 Y CN2578816 Y CN 2578816Y
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- creep
- differential transformer
- deformation
- prime amplifier
- automatic data
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Abstract
The utility model relates to a creep deformation measuring and automatic data collecting device, which belongs to the technical field of performance test of metal material. The utility model is composed of an extensometer, a differential-transformer sensor, a preamplifier, a two-way power supply, an interface, a displacement monitor, a computer, a printer, and a CRT display device. The differential-transformer sensor is connected with the input end of the preamplifier; the output end of the preamplifier is connected with a signal shielding cable which is connected with an A/D shifting plate which is connected with the computer through a PCI interface of the computer. The utility model changes manual recording mode of deformation date of creep test sample in creep experiments, realizes creep deformation measuring and automatic data collection which controlled by computers, increases the precision and work efficiency of creep experiments, and enhances the reliability of test data.
Description
Affiliated technical field
The utility model belongs to the metal material technical field of performance test, particularly is used for the deformation of creep measurement and the automatic data collection device of metal material creep test.
Background technology
Metal material mechanical property at high temperature is a research and a very important part of evaluation metal material performance.This wherein the high temperature creep property of metal material be a very important index, the research of metal material croop property all has very important and practical meanings to the gas turbine of working, high-temperature and pressure pipeline, internal combustion engine, boiler, nuclear reactor etc. under the condition of high temperature.The deformation of creep measurement of metal material and data acquisition are two key technical problems in the creep test, and for a long time, testing laboratory uses clock gauge or differential transformer type displacement meter to measure the deformation of creep.In the creep test process, the obtaining of deformation of creep data is even in the process of 100 hours even longer time long run test, also will rely on fully and manually read and record on time.And manually can't record before test initial stage and sample fracture.Because people's physical efficiency and laboratory technician are to the existence of the factors such as sense of responsibility of work, artificial error will inevitably be produced, produce false deformation of creep data, because the existence of these untrue deformation of creep data, a part of irregular point will occur when the deformation of creep curve of metals plotted material, this in addition measuring method does not meet among the HB5151-96 " metallic high temperature tensile test method " and measures the regulation that should be furnished with graphic meter about the deformation of creep.
Summary of the invention
Measure to rely at the metal material deformation of creep in the prior art and manually to read and to write down, can not measure automatically and the problem of image data, the utility model provide a kind of simple in structure, data are reliable, measuring accuracy is high, be easy to the deformation of creep measurement and the automatic data collection device of Installation and Debugging and maintenance.
The utility model is made up of extensometer, differential transformer transducer, prime amplifier, double loop power supply, interface, displacement monitor, computing machine, printer, CRT monitor.With the differential transformer transducer clamping in special-purpose extensometer bottom, the protruding garden part close-coupled of the gauge length up and down of the top of extensometer and creep sample, the mobile of extensometer iron core will react the distortion of creep sample really like this, one end ground connection of differential transformer transducer secondary coil, the other end links to each other with CBW type prime amplifier signal input part, the 0.8V of CBW type prime amplifier, 3KHz oscillation source connect the primary coil of differential transformer transducer, the other end ground connection of primary coil.WDS-1 type double loop power supply provides ± the 12V DC voltage CBW type prime amplifier, the output termination twin-core signal shielding cable of CBW type prime amplifier, one end ground connection of twin-core signal shielding cable, CH1～the CH16 of another termination PS-2120A/D change-over panel D type socket, by the PS-2120A/D change-over panel analog signal conversion is become digital signal, PS-2120A/D mould/number conversion plate joins by computer PCI interface and computing machine.The signal that is transferred to computer interface by differential transformer transducer can be multichannel, adds up to 16 the tunnel, and promptly 16 road creep sample deformation signals are through shielded cable and the input of A/D change-over panel input end.
The utility model is by differential transformer transducer and CBW type prime amplifier, by the PS-2120A/D change-over panel creep sample mechanical displacement is passed to computing machine through the twin-core signal shielding cable, carries out data acquisition and processing (DAP) by computing machine.Therefore, for guaranteeing the accurate of measurement data, with the standard displacement meter deformation of creep measurement and automatic data collection device are calibrated, when the standard displacement meter provides the standard shift value, observe computing machine instant playback value, during if any error, modulate the calibration potentiometer knob of prime amplifier side, make the standard value of CRT displayed value conformance with standard displacement meter.
The utility model has fundamentally changed the manual record mode of creep sample deformation data in the creep test.Differential transformer transducer is out of shape situation really with the creep sample both sides, be transferred to computing machine by the twin-core signal shielding cable, computing machine will be gathered the creep sample distortion situation in a certain moment automatically according to the time interval of setting, and carry out instant playback, data processing, curve fitting, data backup, printing reports.Thereby improved the precision and the work efficiency of creep test greatly, strengthened the reliability of test figure.
Description of drawings
Fig. 1 is the utility model differential transformer transducer fundamental diagram,
Fig. 2 is the utility model prime amplifier functional-block diagram,
Fig. 3 is the utility model A/D change-over panel input socket, switch, bridge position figure,
Fig. 4 is the utility model function software workflow diagram,
Fig. 5 is the utility model electrical block diagram.
Embodiment
Consult Fig. 1, Fig. 2, differential transformer transducer is a kind of linear displacement transducer, and it is made up of a primary coil and two secondary coils.As Fig. 1, when the mechanical location of movable core was in twice level coils middle, the differential transformer transducer output voltage was zero.During by direction as shown move left and right iron core, the differential transformer transducer output voltage will increase, iron core-5mm to+differential transformer transducer output voltage and iron core displacement were linear dependence when the 5mm scope moved, as Fig. 2, utilize this relation to realize the linear conversion of mechanical quantity, thereby realize the electrical measuring method of mechanical quantity to electric weight.CBW type prime amplifier links to each other with differential transformer transducer, provide 0.8V to the differential transformer transducer primary coil, the 3KHz alternating voltage, oscillation source as the differential transformer transducer primary coil, two parallel connection of secondary windings of differential transformer transducer together, one end ground connection, the input socket of another termination CBW type prime amplifier, CBW type prime amplifier includes mechanical displacement to power conversion circuit, amplifying circuit, phase-sensitive rectifier circuit and active filter circuit.CBW type prime amplifier to the input signal of differential transformer transducer amplify, phase depending on rectification, active power filtering, the direction difference that moves by the differential transformer transducer iron core, output-5V～+ the 5V DC voltage, realized the linear conversion of mechanical displacement to electric weight.The entire circuit of CBW type prime amplifier is installed in the little square box, differential transformer transducer input socket and double loop power supply input socket (No. 4 pin of this socket do not connect signal output) are installed at the square box two ends, and signal output is the microphone socket output of installing by end face.In the side of square box the calibration adjustments hole is arranged, when calibrating, be used for regulating the linear error of its output signal with the standard displacement meter.
CBW type prime amplifier output-5V～+ voltage measurement signal of 5V, reach the computer interface place through the twin-core signal shielding cable, computer interface adopts PS-2120 type light to isolate the A/D change-over panel, be connected with the PCI jack with computing machine, this plate is the IBM-PC bus design, and total linear light isolation technology in the utilization, and the measured signal system is isolated with computer system, isolation voltage is 500 volts, is applicable to the collection of industry spot data.The resolution of this plate is 14, and input channel is 16 the tunnel, can monitor simultaneously the distortion situation of 8 creep samples simultaneously.Input impedance＞10M Ω, be 10 microseconds switching time, the composition error of this system (composition error=nominal value-measured value/full scale value * 100%)＜0.0366%.
Consult Fig. 3, wherein CZ1D type socket is the input end of CBW type prime amplifier signal, and K1 is that amplifier gain is selected, K2 is that I/O address is selected, KJ1, KJ2 are that analog quantity is imported single, double end selection, and KJ3 is that analog quantity is imported single, double polarity selection, and KJ4, KJ5 are used for 8253 work.
The setting of amplifier gain: the gain of instrumentation amplifier is set with 4 bit switch K1 of plate top.Amplifier is provided with different gains, and then the magnitude of voltage difference of full scale is 1 if gain, and full scale is 10V; When gain is 100, full scale is 100mV; Gain is 1000, and full scale is 10mV.When bipolarity, gain is 1, positive and negative full scale is divided into+5V ,-5V; Gain is 10, positive and negative full scale is+500mV ,-500mV; Gain is 100, positive and negative full scale is respectively+50mV ,-50mV; Gain is 1000, positive and negative full scale is+5mV ,-5mV.Four adjustment potentiometer W1 on the plate, W2, W3, W4, W3, W4 are used for adjusting and import zero point, and W1, W2 are used for adjusting positive and negative full scale value.When gain was 1, the input zero-signal was read the A/D conversion value repeatedly, and it is zero that adjusting W4 makes its A/D transformation result.When gain was 10,100,1000, zero point, adjustment should be regulated W3.
The setting of I/O address: this plate takies continuous 8 I/O address of main frame altogether, first address is set by K switch 2,1,2,3,4,5,6, the 7 difference corresponding address A3 of K2, A4, A5, A6, A7, A8, A9, K2 pushes the ON place, represent that this address is 0, otherwise be 1, K2 is set so just obtains a first address, the continuous variation of A0, A1, A2 has just formed one group of 8 continuous I/O address.
The resolution of deformation of creep measurement and automatic data collection device is 1 μ m, measurement range ± 5mm, relative error＜1%, (in ± 5mm scope, be a measurement point every 100 μ m, pointwise is examined and determine with the standard displacement meter, relative error=CRT instant playback value-standard displacement meter standard value/standard displacement meter standard value * 100%).
By (500～800 ℃ of test temperature scopes are examined in deformation of creep measurement and the test of automatic data collection device long period, accumulated time was above 1000 hours), illustrate that this deformation of creep measurement and automatic data collection device are reliable and stable to the collection of creep sample deformation measurement and data, can satisfy testing requirements fully.
Claims (3)
1, a kind of deformation of creep measurement and automatic data collection device, it is characterized in that by extensometer, differential transformer transducer, prime amplifier, double loop power supply, interface, displacement monitor, computing machine, printer, CRT monitor is formed, the differential transformer transducer clamping is in the extensometer bottom, extensometer top closely links to each other with creep sample, one end ground connection of differential transformer transducer secondary coil, the other end connects with the prime amplifier signal input part, the oscillation source of prime amplifier connects the primary coil of differential transformer transducer, the other end ground connection of primary coil, the output termination twin-core signal shielding cable of prime amplifier, one end ground connection of twin-core signal shielding cable, another termination A/D change-over panel, the A/D change-over panel joins by computer PCI interface and computing machine.
2, deformation of creep measurement according to claim 1 and automatic data collection device is characterized in that said prime amplifier includes mechanical displacement to power conversion circuit, amplifying circuit, phase-sensitive rectifier circuit and active filter circuit.
3, deformation of creep measurement according to claim 1 and automatic data collection device, the signal that it is characterized in that being transferred to by differential transformer transducer computer interface is multichannel, adds up to 16 the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02273979 CN2578816Y (en) | 2002-07-04 | 2002-07-04 | Creep deformation measuring and automatic data collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02273979 CN2578816Y (en) | 2002-07-04 | 2002-07-04 | Creep deformation measuring and automatic data collecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2578816Y true CN2578816Y (en) | 2003-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02273979 Expired - Fee Related CN2578816Y (en) | 2002-07-04 | 2002-07-04 | Creep deformation measuring and automatic data collecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2578816Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091182A (en) * | 2013-01-30 | 2013-05-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Biaxial-creep-instrument-based acquisition and measurement system |
| CN105445105A (en) * | 2015-12-24 | 2016-03-30 | 中国电力科学研究院 | Method for detecting creep resistance of aluminum alloy cable conductor |
-
2002
- 2002-07-04 CN CN 02273979 patent/CN2578816Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091182A (en) * | 2013-01-30 | 2013-05-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Biaxial-creep-instrument-based acquisition and measurement system |
| CN105445105A (en) * | 2015-12-24 | 2016-03-30 | 中国电力科学研究院 | Method for detecting creep resistance of aluminum alloy cable conductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031008 |