CN101441152B - Material tester based on USB data acquisition system - Google Patents
Material tester based on USB data acquisition system Download PDFInfo
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- CN101441152B CN101441152B CN2008102075613A CN200810207561A CN101441152B CN 101441152 B CN101441152 B CN 101441152B CN 2008102075613 A CN2008102075613 A CN 2008102075613A CN 200810207561 A CN200810207561 A CN 200810207561A CN 101441152 B CN101441152 B CN 101441152B
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Abstract
The invention discloses a material testing machine based on an USB data acquisition system, which comprises a mechanical part, a data acquisition system, an USB communication system and a host computer system, wherein the mechanical part is connected with the data acquisition system through a motor controller, a force sensor, and a displacement sensor; the data acquisition system is connected with the USB communication system through an USB interface, while the USB communication system is connected with the host computer system through an USB interface; the data acquisition system is a load acquisition system and a displacement acquisition system. The invention has the advantages of applying intuitiveness and user-friendly interface of the data acquisition card testing system, simultaneously improving cost performance and reliability of the system, enhancing competitiveness of products, improving acquisition precision of high-force material testing machine, can be applicable for high-precision material testing machine based on the USB data acquisition system.
Description
[technical field]
The present invention relates to the Material Testing Machine field, specifically, is a kind of Material Testing Machine based on the usb data acquisition system.
[background technology]
In the Material Testing Machine field, adopt based on pci bus, isa bus or RS-232 universal serial bus pattern mostly at present as data acquisition based on PC or industrial computer material testing machine observe and control system.Though pci bus has higher transmission speed (132Mbps), and support that " plug and play " function, its shortcoming are the plug troubles, and expansion slot limited (being generally 5～6), obviously there is same problem in isa bus.Though the RS-232 universal serial bus links simple, but its transmission speed slow (56Kbps), and the serial ports number of main frame is also limited, thereby the general method of passing through the data collecting plate card collection exists following shortcoming at present: trouble is installed, be subject to the interference of environment in the cabinet and cause the distortion of image data, be subject to the restriction of computer slot quantity and address, interrupt resources, poor expandability.
USB (universal serial bus) (Universal Serial Bus, be called for short USB) be nineteen ninety-five Compaq, Microsoft, IBM, companies such as DEC are in order to solve the deficiency of conventional bus, and a kind of novel standard for serial communication of releasing, this bus interface has easy for installation, high bandwidth, advantages such as easy expansion, become the development trend of modern data transmission gradually, make full use of the above-mentioned advantage of usb bus based on the data acquisition system (DAS) of USB, solved the defective of traditional data acquisition system effectively, the standard of USB can require to provide different selections at the different ratios of performance to price, satisfying different systems and parts and corresponding different function, thereby bring great convenience to use.
The inventor had once developed computermatic material testing system for the permanent space in Guangdong Instr Ltd., this tester has adopted the data collecting card that grinds magnificent PCI1716, have 16 AD conversions, 16 tunnel analog inputs, 2 tunnel simulation outputs, 1 external counter, 16 road digital quantity I/O, sampling rate can reach 250ksps, though the installation data capture card is convenient to data acquisition and analysis in PC, shorten the construction cycle, data sampling speed height, but also there is shortcoming: trouble is installed, cost an arm and a leg, be subjected to computer slot quantity, the address, the restriction of interrupt resources, poor expandability simultaneously in the strong test site of some electromagnetic interference (EMI), can't be made electromagnetic screen to it under a lot of situations specially, thereby cause the data distortion gathered, interference free performance is relatively poor.Obvious this data acquisition system (DAS) can't satisfy the demand of different user and various application scenarios, and therefore, the inventor develops a kind of precision height, fast, easy to use, the reliable and stable material testing machine observe and control instrument of new generation of speed on the basis of this work.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, a kind of Material Testing Machine based on the usb data acquisition system is provided.
The objective of the invention is to be achieved through the following technical solutions:
A kind of Material Testing Machine based on the usb data acquisition system, comprise mechanical part, data acquisition system (DAS), usb communication system and master system, wherein, mechanical part is by electric machine controller, and force transducer and displacement transducer are connected with data acquisition system (DAS); Data acquisition system (DAS) links to each other with the usb communication system by USB interface, and the usb communication system is connected with master system by USB interface; It is characterized in that described data acquisition system (DAS) is load acquisition system and displacement acquisition system;
Described load acquisition system comprises force transducer, signal condition, analog multichannel switch, programmable gain amplifier and A/D converter; Wherein, force transducer will collect voltage signal and link to each other with signal condition, signal condition is directed to voltage signal on the programmable gain amplifier by analog multichannel switch, the voltage signal that will obtain amplifying links to each other with A/D converter again, will link to each other with single-chip microcomputer by serial line interface through the result of A/D converter conversion;
Described displacement acquisition system comprises grating encoder, declares to interface circuit and interface circuit; Displacement signal converts pulse signal to by grating encoder, and pulse signal links to each other with single-chip microcomputer by declaring to interface circuit, and pulse signal links to each other with single-chip microcomputer by interface circuit;
Described A/D converter is 24 oversampling analog-to-digital converter converters;
Described single-chip microcomputer, the single-chip microcomputer that is 51 kernels is as master controller;
Described mechanical part comprises motor, variator, steering gear, leading screw, worktable and anchor clamps; Motor links to each other with leading screw with steering gear by variator, and worktable is provided with screw and links to each other with leading screw, and the middle part of worktable is provided with anchor clamps;
Described usb communication system, wherein, the chip that USB interface adopts is selected from a kind of of independent USB interface chip or integration USB interface chips, is preferably independent USB interface chip;
Described master system, comprise PC, printer and host computer testing software, wherein, the host computer testing software is installed on the PC, the main functions such as the communication of USB host computer, curve display analysis, data processing, report printing, pilot relay that realize, the user directly carries out the sequence of operations of material test by host computer testing software interface.
The good effect of a kind of Material Testing Machine based on the usb data acquisition system of the present invention is:
(1) between single-chip microcomputer and PC, adds the USB interface chip, make single-chip microcomputer and PC can realize data communication, single-chip microcomputer and A/D chip are responsible for data acquisition and processing (DAP), the PC application program is to adopting to such an extent that data are analyzed and shown, can reach the intuitive and the friendly interface of application data capture card test macro like this, can improve simultaneously the cost performance and the reliability of system again, strengthen competitiveness of product;
(2) adopt USB interface to improve its data rate, accuracy rate and ease of use, the next single-chip microcomputer adopts 24 ADS1256 as A/D converter, can improve the acquisition precision of Material Testing Machine power value, be adapted to the high precision material testing machine observe and control system and gather acquisition system based on usb data.
[description of drawings]
Fig. 1 general structure synoptic diagram of the present invention;
The hardware configuration synoptic diagram of Fig. 2 data acquisition system (DAS).
[embodiment]
The present invention below is provided a kind of embodiment of the Material Testing Machine based on the usb data acquisition system.
Embodiment 1
See also Fig. 1, a kind of Material Testing Machine based on the usb data acquisition system comprises mechanical part, data acquisition system (DAS), usb communication system and master system, wherein, mechanical part is by electric machine controller, and force transducer and displacement transducer are connected with data acquisition system (DAS); Data acquisition system (DAS) links to each other with the usb communication system by USB interface, and the usb communication system is connected with master system by USB interface; Described data acquisition system (DAS) comprises load acquisition system and displacement acquisition system;
See also Fig. 2, described load acquisition system, comprise force transducer, signal condition, analog multichannel switch, programmable gain amplifier, A/D converter and single-chip microcomputer, wherein, force transducer collects voltage signal, processing and conversion by signal condition, under the guiding of analog multichannel switch the voltage signal of handling well being directed to programmable gain amplifier amplifies, and then the voltage signal that amplifies carried out analog to digital conversion, at last transformation result is sent to single-chip microcomputer by serial line interface and carry out data processing and communication; Signal conditioning circuit is mainly finished the differential analog signal of sensor output is nursed one's health and changed, and makes it and can be accepted by the AD chip, carries out digital-to-analog conversion, and single-chip microcomputer is the central control unit of system, and the data acquisition usb communication is subjected to Single-chip Controlling fully;
Described displacement acquisition system, comprise grating encoder, declare to interface circuit, interface circuit and single-chip microcomputer, wherein, displacement signal converts pulse signal to by grating encoder, differentiate the direction of displacement on the one hand by phase identifying circuit, and direction signal is sent to single-chip microcomputer, and the pulse signal that will adopt conversion by interface circuit is connected on the single-chip microcomputer on the other hand, and displacement signal is counted collection;
Described A/D converter is 24 oversampling analog-to-digital converter converters;
Described single-chip microcomputer, the single-chip microcomputer that is 51 kernels is as master controller;
Described mechanical part comprises motor, variator, steering gear, leading screw, worktable, anchor clamps, and motor links to each other with leading screw with steering gear by variator, and worktable is provided with screw and links to each other with leading screw, and the middle part of worktable is provided with anchor clamps; Wherein, motor drives leading screw by variator and steering gear and rotates, there is screw to cooperate on the worktable with leading screw, leading screw can only rotate, can not move up and down, driving worktable when screw mandrel rotates moves up and down, so just the rotation of machine shaft is changed into moving up and down of worktable, one end of S type force transducer is fixed on machine top platform, last anchor clamps are connected in the other end of force transducer, and lower clamp is housed on the worktable, after last lower clamp is clamped test specimen, can worktable be moved up and down starter motor, at this moment just begin to stretch or the compression measured material;
Described usb communication system, wherein, described USB interface chip is selected from a kind of of independent USB interface chip or integration USB interface chips, is preferably independent USB interface chip;
Described master system, comprise PC, printer and host computer testing software, wherein, the host computer testing software is installed on the PC, the main functions such as the communication of USB host computer, curve display analysis, data processing, report printing, pilot relay that realize, the user directly carries out the sequence of operations of material test by host computer testing software interface.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered within the scope of protection of the present invention.
Claims (6)
1. the Material Testing Machine based on the usb data acquisition system comprises mechanical part, data acquisition system (DAS), usb communication system and master system, it is characterized in that,
Described data acquisition system (DAS) comprises load acquisition system and displacement acquisition system;
Described load acquisition system, comprise force transducer, signal condition, analog multichannel switch, programmable gain amplifier, the single-chip microcomputer of A/D converter and 51 kernels, wherein, force transducer collects voltage signal, processing and conversion by signal condition, under the guiding of analog multichannel switch the voltage signal of handling well being directed to programmable gain amplifier amplifies, and then the voltage signal that amplifies carried out analog to digital conversion, at last transformation result is sent to single-chip microcomputer by serial line interface and carry out data processing and communication;
Described displacement acquisition system, comprise grating encoder, declare to interface circuit, interface circuit and single-chip microcomputer, wherein, displacement signal converts pulse signal to by grating encoder, differentiate the direction of displacement on the one hand by phase identifying circuit, and direction signal is sent to single-chip microcomputer, and the pulse signal that will adopt conversion by interface circuit is connected on the single-chip microcomputer on the other hand, and displacement signal is counted collection;
Described master system comprises PC, printer and host computer testing software, and the host computer testing software is installed on the PC;
Mechanical part is by electric machine controller, and force transducer and displacement transducer are connected with data acquisition system (DAS); Data acquisition system (DAS) links to each other with the usb communication system by USB interface as master controller with the single-chip microcomputer of 51 kernels, and the usb communication system is connected with master system by USB interface.
2. a kind of Material Testing Machine based on the usb data acquisition system according to claim 1 is characterized in that described load acquisition system comprises force transducer, signal condition, analog multichannel switch, programmable gain amplifier and 24 A/D converters; Wherein, force transducer will collect voltage signal and link to each other with signal condition, signal condition is directed to voltage signal on the programmable gain amplifier by analog multichannel switch, the voltage signal that will obtain amplifying links to each other with A/D converter again, will link to each other with single-chip microcomputer by serial line interface through the result of A/D converter conversion.
3. a kind of Material Testing Machine based on the usb data acquisition system according to claim 1 is characterized in that, described displacement acquisition system comprises grating encoder, declares to interface circuit and interface circuit; Displacement signal converts pulse signal to by grating encoder, and pulse signal links to each other with single-chip microcomputer by declaring to interface circuit, and pulse signal links to each other with single-chip microcomputer by interface circuit.
4. a kind of Material Testing Machine based on the usb data acquisition system according to claim 1 is characterized in that described mechanical part comprises motor, variator, steering gear, leading screw, worktable and anchor clamps; Motor links to each other with leading screw with steering gear by variator, and worktable is provided with screw and links to each other with leading screw, and the middle part of worktable is provided with anchor clamps.
5. a kind of Material Testing Machine based on the usb data acquisition system according to claim 1 is characterized in that, in described usb communication system, the chip that USB interface adopts is selected from a kind of of independent USB interface chip or integration USB interface chips.
6. a kind of Material Testing Machine based on the usb data acquisition system according to claim 5 is characterized in that described USB interface chip is preferably independent USB interface chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102075613A CN101441152B (en) | 2008-12-23 | 2008-12-23 | Material tester based on USB data acquisition system |
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| CN2008102075613A CN101441152B (en) | 2008-12-23 | 2008-12-23 | Material tester based on USB data acquisition system |
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| CN101441152A CN101441152A (en) | 2009-05-27 |
| CN101441152B true CN101441152B (en) | 2011-11-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102297803A (en) * | 2010-06-22 | 2011-12-28 | 鸿富锦精密工业（深圳）有限公司 | Material testing system and method |
| CN102735965B (en) * | 2012-06-12 | 2015-06-17 | 合肥市航嘉电子技术有限公司 | Full-automatic efficient product function testing device |
| CN102809505B (en) * | 2012-07-30 | 2015-05-13 | 西安交通大学 | Experimental device and method for measuring mechanical property of special material in macroscale |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766767A (en) * | 2005-08-13 | 2006-05-03 | 深圳市新三思材料检测有限公司 | Tester measure and control device based on DSP and measure and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1766767A (en) * | 2005-08-13 | 2006-05-03 | 深圳市新三思材料检测有限公司 | Tester measure and control device based on DSP and measure and control method thereof |
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