CN2729804Y

CN2729804Y - Virtual strain test instrument

Info

Publication number: CN2729804Y
Application number: CN 200420061581
Authority: CN
Inventors: 秦树人
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-30
Filing date: 2004-09-30
Publication date: 2005-09-28
Anticipated expiration: 2014-09-30

Abstract

The utility model relates to a virtual strain test instrument, comprising a strain gauge L and a computer system, wherein, resistor signals exported by the strain gauge are converted into voltage signals via a bridge circuit and then are exported, the utility model is characterized in that the signal output terminal of the bridge circuit is connected with a strain signal opsonize module IC1, is carried to a data collection card IC2 based on the PCI bus to carry on an A/D switch after treatment of amplification and filtering and then communicates with a computer via the PCI bus and a PCI bus expanding groove in the computer. The utility model has the following advantages: it can carry on simultaneous measurement according to multiple points and multiple parameters, improving the development efficiency, the propagation is flexible, it can carry on the on-line analysis and off-line analysis, easily finishing the acquisition, display, storage and playback of data and corresponding analysis process, and the data-handling capacity is strong, so it can edit, store and print data, being convenient to look for and analyse; the modus of processing signals is of diversification, the develop and maintenance cost is low, and the operation is easy; it is convenient to carry along and carry on the field test.

Description

Subjunctive mood strain testing instrument

Technical field

The utility model relates to test and field of analytic instrument, subjunctive mood strain testing instrument particularly, more particularly, relate to a kind of data collecting card, carry out the subjunctive mood strain testing instrument of communication by pci bus expansion slot in the computing machine and computing machine based on pci bus.

Background technology

Strain measurement is the important means of physical construction and problems of mechanical strength of analyzing and researching, to guaranteeing the plant equipment safe operation, realizing that aspect such as detection and automatic control all has important effect automatically.Traditional strain measuring instrument is based on strainmeter, and it is made up of measuring bridge, amplifier, phase-sensitive detector (PSD), low-pass filter, stabilized voltage supply and oscillator etc., if show and record data, is equipped with indicating instrument, oscillograph and registering instrument etc. again.Mainly have the following disadvantages: (1) constitutes such test macro needs multiple devices, must strictly mate between the equipment, so the type selecting of equipment, debugging and use are cumbersome.When multimetering, must be equipped with multiple spot preset tandem-driving bogie to solve the problem of multiple spot switching and zero balance, testing efficiency is low.(2) can only carry out strain measurement, can't carry out the conversion of stress and other parameter, so instrumental function is single, sealing is fixing, is difficult for expansion, is difficult to satisfy the various requirement of the diversity of strain measurement content to the strain measuring instrument proposition.(3) can not do further to analyze and handle to measurement data,, therefore can't obtain more deep information as statistical study, Eigenvalue Analysis etc.Measurement result can not graphically show, can not store and print, can not off-line analysis.(4) instrument interface is more stiff, and graphical degree is low, and quantity of information is little; Development and maintenance expense height costs an arm and a leg, and the technology innovation cycle is long, interconnected limited autonomous device, and also inconvenience is carried.

Summary of the invention

The utility model purpose is to provide a kind of subjunctive mood strain testing instrument, overcome the deficiency of existing strain gauge means, after the signal that sensor acquisition is arrived is handled through the strain signal conditioning module, enter data collecting card based on pci bus, then the data after the conversion are passed through pci bus expansion slot and computing machine communication in the computing machine, utilize the powerful calculation function and the high resolution display of computing machine, carry out operations such as graphic presentation, analysis.And the application of management of coupled computer software modularity and computer interconnected network, can develop multiple assistant analysis and diagnostic function.

The technical solution adopted in the utility model is such: promptly a kind of subjunctive mood strain testing instrument comprises that strain takes into account computer system; Wherein the resistance signal of strainometer output is converted to voltage signal output by bridge diagram, it is characterized in that, the signal output part of described bridge diagram connects the strain signal conditioning module, carry out the A/D conversion through the data collecting card that is sent to after amplification, the Filtering Processing based on pci bus again, then by pci bus expansion slot and computing machine communication in the computing machine, computing machine is handled the signal that receives, and figure and analysis result are presented on the display.

Subjunctive mood strain testing instrument of the present utility model can solve several problems that conventional hardware strain testing instrument can't or be difficult to realize: the demonstration of (1) hyperchannel ess-strain real-time graph; (2) storage of strain acquirement data and playback; (3) any time ess-strain value measurement; (4) the automatic warning of many reference amounts measured value ultralimit; (5) printout of waveform and statistical characteristics; (6) amplification of waveform and cursor tracking reading; (7) can carry out the conversion of stress, moment of torsion and moment of flexure automatically.

The subjunctive mood strain testing instrument that the utility model provides is compared with the conventional hardware strain measuring instrument, overcome the above-mentioned deficiency of conventional hardware strain gauge, have following advantage: (1) can be measured by multiple spot simultaneously, its software function with one by one independently program module realized, improved development efficiency, by the function expansion, can also measure different kinds of parameters such as moment of torsion and power; (2) make full use of existing technical resource, the application software feature richness of system, conversion so have the not available flexible expansion of traditional strainmeter, no longer is subjected to function that the restriction of traditional strain measuring instrument of (being provided by producer fully) is provided flexibly; (3) adopt software automatic zero adjustment function, eliminate the error that the imbalance of initial electric bridge is brought, need not any manual adjustments, make the preliminary work before the test reduce to minimum, save the balancing step, improved testing efficiency; (4) can carry out online and off-line analysis, and the integrated aspect of data acquisition and processing strides forward major step, easily finished data acquisition, demonstration, storage and playback, and corresponding analyzing and processing, data-handling capacity is strong, can edit, storage and print data, is convenient to search and analyze; (5) can take multiple signal processing method,, improve the data processed result precision as digital Filtering Processing, statistical study, signal frequency-domain analysis etc.; (6) can carry out the influence of tension gauge factor, conductor resistance to image data, item such as non-linear carries out the accurate stress computational analysis, the formation data file after revising again; (7) development and maintenance expense is low, and the technology innovation cycle is short, and price is low, reusable is strong with reconfigurable property, and the user definition instrumental function is open, flexible, can keep synchronized development with computer technology; (8) the man-machine interface close friend is simple to operate, is easy to carry, and can carry out field test easily.

Description of drawings

Accompanying drawing is a structured flowchart block diagram of the present utility model.

Referring to accompanying drawing, the L1～Ln among the figure is that strainometer, IC1--strain signal conditioning module, IC2 are the data collecting card based on pci bus.

Specific embodiments

Referring to accompanying drawing, subjunctive mood strain testing instrument comprises strainometer L1-Ln and computer system, described strainometer is selected the electrical measurement BA120-3AA of Air China type paper tinsel formula uniaxial strain gage for use, the YE293300A type electric bridge box that the signal that described strainometer collects is at first produced by connection energy electronics corporation, convert voltage signal to, passing through strain signal conditioning module (selecting the DH3841 type strain amplifier of eastern magnificent test company for use) then handles, the data collecting card that the signal of strain signal conditioning module output is sent to based on pci bus carries out the A/D conversion, and described data collecting card based on pci bus carries out communication by pci bus expansion slot in the computing machine and computing machine.Computing machine is handled the signal that receives, and figure and analysis result are presented on the display.The CY7C09449 chip that described data collecting card based on pci bus can adopt CYPRESS company to produce.It is that data acquisition processing system carries out the bridge that data exchange with computing machine, has the interface with pci bus and multiple general purpose microprocessor.

Principle of work of the present utility model is referring to as Fig. 1, n strainometer of subjunctive mood strain testing instrument with the signal that collects send into to strain signal amplify, the strain signal conditioning module of Filtering Processing, to the data collecting card that strain signal carries out the A/D conversion based on pci bus, wherein the data collecting card based on pci bus carries out communication by pci bus expansion slot in the computing machine and computing machine.

Computer software module of the present utility model partly works in the Windows operating system platform of Microsoft, adopts the programming of Visual C++ programming language, can work under the operating system platform of Windows 98/2000/XP and later release.As the computer software module part that cooperates with the utility model hardware, allow it to break away from hardware components independent operating of the present utility model.By the network savvy of computing machine, can carry out remote detection and analysis.

The software module that cooperates with subjunctive mood strain testing instrument of the present utility model mainly comprises:

(1) data communication module, its bottom uses the port drivers of Windows standard, by advanced language programming, realizes based on the data collecting card of pci bus and the communication between the computing machine;

(2) signal waveform representation module is used for signal waveform is shown in graphoscope, and can show any time measured value;

(3) analytic function module realizes the analytic function to measured signal, as time-domain analysis and frequency-domain analysis, also can carry out processing such as digital noise reduction and digital filtering;

(3) printer output module is used for signal waveform, analysis result and statistics are outputed to printer.As standard output, this software is supported the printer of all Windows standards;

(4) signal hard-disc storage module, after computing machine received signal by pci expansion slot, if the user has selected keeping records, then subjunctive mood strain testing instrument can be preserved data automatically in real time.

(5) network savvy is used ICP/IP protocol, under hardware device is supported, by the internet, can realize remote detection and analytic function.

Claims

1, a kind of subjunctive mood strain testing instrument comprises strainometer (L) and computing machine; Wherein the resistance signal of strainometer output is converted to voltage signal output by bridge diagram, it is characterized in that, the signal output part of described bridge diagram connects strain signal conditioning module (IC1), carry out the A/D conversion through the data collecting card (IC2) that is sent to after amplification, the Filtering Processing based on pci bus, then by pci bus expansion slot and computing machine communication in its pci bus and the computing machine.