CN104048876A - Multi-channel stress and strain data acquisition system and multi-channel stress and strain data method for unidirectional micro stretcher - Google Patents
Multi-channel stress and strain data acquisition system and multi-channel stress and strain data method for unidirectional micro stretcher Download PDFInfo
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- CN104048876A CN104048876A CN201410284228.8A CN201410284228A CN104048876A CN 104048876 A CN104048876 A CN 104048876A CN 201410284228 A CN201410284228 A CN 201410284228A CN 104048876 A CN104048876 A CN 104048876A
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Abstract
The invention relates to a multi-channel stress and strain data acquisition system and a multi-channel stress and strain data acquisition method for a unidirectional micro stretcher. A data acquisition card is provided with two acquisition ports; a displacement sensor is assembled with a pull rod sliding part; an acquired displacement signal is amplified through a signal amplifier and is sent to one of the acquisition ports of the data acquisition card for analog-digital conversion; a pressure signal acquired by a pressure sensor is amplified through the signal amplifier and then is sent to the other acquisition port of the data acquisition card for the analog-digital conversion; data acquired by the data acquisition card is sent to a computer to processed; the computer outputs a pulse signal to drive the unidirectional micro stretcher to stretch through a motion control card and a direct-current stepping motor in sequence; a signal conditioning board block performs denoising and smoothing on the acquired data; the processed data are bound and sent into an XY waveform chart. In the whole process, the computer controls the data acquisition, the motion of the stretcher, and the data processing, so that the data acquisition efficiency and the data acquisition precision are improved; the multi-channel stress and strain data acquisition system has the characteristics of convenience, simplicity and understandability.
Description
Technical field
The present invention relates to a kind of data acquisition system (DAS), particularly a kind of unidirectional miniature drawing machine hyperchannel stress-strain data acquisition system and acquisition method.
Background technology
The Mechanics Performance Testing of metal material is exactly the unilateral stretching by sheet stock, obtain the mechanical performance index of material, especially pass judgment on the parameter index of materials plastic forming, thereby analysis of metallic materials is in different deformation conditions and the plastic yield performance under mode of texturing.
Material mechanical performance test has very important significance to sheet material forming assessment tool.At present, the data acquisition of one-way stretcher mainly relies on mechanical hook-up to obtain, and data processing relies on artificial treatment.Like this, data acquisition not only real-time is poor, and accuracy is not high; Data processing relies on artificial treatment subjective error large, and efficiency is low.In a word, the data acquisition of existing one-way stretcher is larger with the error that processing causes the test result of the mechanical property of materials, cannot meet the accuracy requirement of shaping.
Summary of the invention
The present invention be directed to the error existing in one-way stretcher data acquisition and processing procedure large, efficiency is low, cannot meet the problem of accuracy requirement, a kind of unidirectional miniature drawing machine hyperchannel stress-strain data acquisition system and acquisition method have been proposed, realize the intellectuality of unidirectional miniature drawing machine multi-channel data acquisition, improved the efficiency of data acquisition and the precision of accuracy and Data Processing in Experiment result.
Technical scheme of the present invention is: a kind of unidirectional miniature drawing machine hyperchannel stress-strain data acquisition system, comprises miniature one-way stretcher, DC stepper motor, computing machine, data collecting card, motion control card, pressure transducer and signal amplifier, linear displacement transducer and signal amplifier; Computer export pulse signal, is driven and is connected with DC stepper motor by motion control card, and DC stepper motor band actuating miniature one-way stretcher stretches; Data acquisition is installed in the PIC socket of computing machine, and data acquisition is arranged with two and gathers port; Displacement transducer and pull bar slipper fit together, and collection displacement signal is delivered to collection port of data collecting card and carried out analog to digital conversion after signal amplifier amplifies; Pressure transducer, together with the assembling of pull bar fixed part, gathers pressure signal and after signal amplifier amplifies, send another collection port of data collecting card to carry out analog to digital conversion; Data collecting card image data send computing machine to process.
Described unidirectional miniature drawing machine hyperchannel stress-strain data acquisition method, specifically comprises the steps:
1) system is carried out initialization, two port zero clearings of data collecting card, thus data reset all, and input relevant parameter, wherein input parameter is expanded material length and width, thick;
2) one-way stretcher starts, and by computer programming, provides pulse signal, is connected, and then realizes motor driving by motion control card with motor driver, starts expanded material;
3) data collecting card send computing machine by real-time displacement and pressure signal, and in computing machine, signal condition plate carries out denoising to image data, smoothing processing, the XY waveform chart of then the data binding after processing being made a gift to someone;
4) data of handling well are sent into XY waveform icon, produced in real time waveform, show, and store.
Beneficial effect of the present invention is: the unidirectional miniature drawing machine hyperchannel stress-strain data acquisition system of the present invention and acquisition method, overall process adopts Computercontrolled data acquisition, drawing machine motion, data handling procedure, has realized the intellectuality of unidirectional miniature drawing machine multi-channel data acquisition, has realized real-time data acquisition, the efficiency of data acquisition and the precision of accuracy and Data Processing in Experiment result have been improved, can intuitively reflect experimental result, it is convenient to have, the feature being easily understood.
Accompanying drawing explanation
Fig. 1 is the unidirectional miniature drawing machine hyperchannel stress-strain data acquisition system structural representation of the present invention.
Embodiment
Unidirectional miniature drawing machine hyperchannel stress-strain data acquisition system structural representation as shown in Figure 1, comprise miniature one-way stretcher, DC stepper motor, computing machine, data collecting card, motion control card, pressure transducer and signal amplifier, linear displacement transducer and signal amplifier.Computer export pulse signal, is driven and is connected with DC stepper motor by motion control card, and DC stepper motor band actuating miniature one-way stretcher stretches; Computing machine carries out data acquisition and the processing of unilateral stretching process, and data acquisition is installed in the PIC socket of computing machine, and data acquisition is arranged with two and gathers port, and sensor signal is gathered and digital-to-analog conversion; Displacement transducer and pull bar slipper fit together, and gather displacement signal and send data collecting card to carry out analog to digital conversion after signal amplifier amplifies; Pressure transducer, together with the assembling of pull bar fixed part, gathers pressure signal and send data collecting card to carry out analog to digital conversion after signal amplifier amplifies.
Whole system running software comprises system initialization, data acquisition, and data processing, waveform shows four parts.
1) start-up routine, system is carried out initialization, two port zero clearings of data collecting card, thus data reset all, and input relevant parameter, wherein input parameter is that material is long, wide, thick;
2) one-way stretcher starts, and by computer programming, provides pulse signal, is connected, and then realizes motor driving by motion control card with motor driver, starts expanded material;
3) signal condition plate in computing machine, the displacement that data collecting card is sent here and pressure data carry out denoising, smoothing processing, the XY waveform chart of then the data binding after processing being made a gift to someone;
4) oscillogram shows, the data of handling well are sent into XY waveform icon, produces in real time waveform, and stores.
Claims (2)
1. a unidirectional miniature drawing machine hyperchannel stress-strain data acquisition system, it is characterized in that, comprise miniature one-way stretcher, DC stepper motor, computing machine, data collecting card, motion control card, pressure transducer and signal amplifier, linear displacement transducer and signal amplifier; Computer export pulse signal, is driven and is connected with DC stepper motor by motion control card, and DC stepper motor band actuating miniature one-way stretcher stretches; Data acquisition is installed in the PIC socket of computing machine, and data acquisition is arranged with two and gathers port; Displacement transducer and pull bar slipper fit together, and collection displacement signal is delivered to collection port of data collecting card and carried out analog to digital conversion after signal amplifier amplifies; Pressure transducer, together with the assembling of pull bar fixed part, gathers pressure signal and after signal amplifier amplifies, send another collection port of data collecting card to carry out analog to digital conversion; Data collecting card image data send computing machine to process.
2. the acquisition method of system described in claim 1, is characterized in that, specifically comprises the steps:
1) system is carried out initialization, two port zero clearings of data collecting card, thus data reset all, and input relevant parameter, wherein input parameter is expanded material length and width, thick;
2) one-way stretcher starts, and by computer programming, provides pulse signal, is connected, and then realizes motor driving by motion control card with motor driver, starts expanded material;
3) data collecting card send computing machine by real-time displacement and pressure signal, and in computing machine, signal condition plate carries out denoising to image data, smoothing processing, the XY waveform chart of then the data binding after processing being made a gift to someone;
4) data of handling well are sent into XY waveform icon, produced in real time waveform, show, and store.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410284228.8A CN104048876A (en) | 2014-06-24 | 2014-06-24 | Multi-channel stress and strain data acquisition system and multi-channel stress and strain data method for unidirectional micro stretcher |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410284228.8A CN104048876A (en) | 2014-06-24 | 2014-06-24 | Multi-channel stress and strain data acquisition system and multi-channel stress and strain data method for unidirectional micro stretcher |
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| CN104048876A true CN104048876A (en) | 2014-09-17 |
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| CN201410284228.8A Pending CN104048876A (en) | 2014-06-24 | 2014-06-24 | Multi-channel stress and strain data acquisition system and multi-channel stress and strain data method for unidirectional micro stretcher |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490061A (en) * | 2018-03-29 | 2019-03-19 | 中国科学院金属研究所 | The device and test method of environment fatigue experiment are carried out under a kind of waveform control condition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601517A (en) * | 2004-10-27 | 2005-03-30 | 西北工业大学 | Data acquisition processing system of one-way stretcher |
| CN103575593A (en) * | 2013-11-08 | 2014-02-12 | 上海交通大学 | In-situ uniaxial tension observation device for mesoscale metal material |
| CN103604704A (en) * | 2013-12-05 | 2014-02-26 | 长春工业大学 | Small stretch bending device |
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2014
- 2014-06-24 CN CN201410284228.8A patent/CN104048876A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601517A (en) * | 2004-10-27 | 2005-03-30 | 西北工业大学 | Data acquisition processing system of one-way stretcher |
| CN103575593A (en) * | 2013-11-08 | 2014-02-12 | 上海交通大学 | In-situ uniaxial tension observation device for mesoscale metal material |
| CN103604704A (en) * | 2013-12-05 | 2014-02-26 | 长春工业大学 | Small stretch bending device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490061A (en) * | 2018-03-29 | 2019-03-19 | 中国科学院金属研究所 | The device and test method of environment fatigue experiment are carried out under a kind of waveform control condition |
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Application publication date: 20140917 |
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