CN201237611Y - Multifunctional high-precision resistor signal generator - Google Patents
Multifunctional high-precision resistor signal generator Download PDFInfo
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- CN201237611Y CN201237611Y CNU2008200671928U CN200820067192U CN201237611Y CN 201237611 Y CN201237611 Y CN 201237611Y CN U2008200671928 U CNU2008200671928 U CN U2008200671928U CN 200820067192 U CN200820067192 U CN 200820067192U CN 201237611 Y CN201237611 Y CN 201237611Y
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Abstract
The utility model relates to a multi-functional high-precision resistance signal generator, comprising a shell body (1), wherein, a main circuit board (2) is arranged inside the shell body (1), and a C8051F340 single chip, a drive circuit, a relay and high-precision resistor network, an I / V switching circuit, a USB interface, an LCD display module, a keypad interface and a power supply circuit are arranged on the main circuit board (2). The utility model has the advantages that the precision is high; the output resistance is in a range of 0.00 to 655.35 Omega and the accuracy is up to 0.01Omega; arbitrary values can be output or setting values can be automatically output; and the greatest error of the output resistance is not more than 0 .01 Omega in the whole range of the output resistance.
Description
Technical field
The utility model relates to the technology of instrument and meter field, specifically a kind of multifunction high-precision resistance signal generator.
Background technology
Traditional rotation resistance box adopts the combination that realizes different resistance in the precision resistance case by relay or rotary switch etc., but its volume is big, adjusting is loaded down with trivial details, if use relay, because of being connected in series the relay contact resistance accuracy is descended again; Use digital regulation resistance,, then sealed in switch conduction resistance, and, make accuracy be difficult for guaranteeing because its temperature stability is poor if adopt by switching the resistance that semiconductor resistor obtains requiring; If adopt by the driven by servomotor potentiometer, realize that resistance is adjustable, then must adopt the scrambler and the analog to digital converter of high resolution, make cost too high.If adopt operational amplifier and digital to analog converter etc. to constitute one-port network, obtain programmable linear resistance, can obtain the very resistance of pin-point accuracy, but often precision is less.
The error of existing market product hand-held resistance signal source ZY2005 increases along with reading and becomes big gradually, and function is limited.
" method of control and compensation ' The programmable standard hesistance generator ' error " function singleness of number of patent application 200410021628.6, precision is low, and its absolute error is for being not more than 0.2 Ω.
The utility model content
The purpose of this utility model is that a kind of precision height of design, output resistance scope are 0.00～655.35 Ω, precision reaches 0.01 Ω, can arbitrary value output or export setting value automatically, the output resistance maximum error is no more than the multifunction high-precision resistance signal generator of 0.01 Ω.
The utility model multifunction high-precision resistance signal generator comprises: single-chip microcomputer, driving circuit and relay that the C8051F340 model is housed on main circuit board 2, the main circuit board 2 and precision resister network, I/V change-over circuit, USB interface, LCD display module, keyboard interface, power circuit are equipped with in housing 1, housing 1 inside.
The 1-8 pin of the driver U2 of driving circuit links to each other respectively with the 30-37 pin of single-chip microcomputer, and the 1-8 pin of driver U3 links to each other respectively with the 22-29 pin of single-chip microcomputer.The LCD display module respectively with single- chip microcomputer 1,2, the 38-48 pin links to each other.7,8,9,12 pin of USB interface and single-chip microcomputer link to each other respectively.The I/V change-over circuit links to each other with single-chip microcomputer 5 pin.Keyboard interface be single-chip microcomputer 6, the 15-21 pin.Driver U8, the U9 of driving circuit and relay link to each other respectively with 16 relays in the precision resister network.
Driving circuit comprises: four driver U2, U3, U8, U9, and model is ULN2803; Four light are every chip, and model is TLP521-4; And a plurality of resistance and light emitting diode.Concrete annexation is undertaken by the connected mode of circuit theory diagrams.
Relay and precision resister network comprise: the relay of 16 precision resisters and 16 little contact resistances, concrete annexation is undertaken by the connected mode of circuit theory diagrams.
The I/V change-over circuit comprises: resistance R 1-R6, and capacitor C 6-C9, concrete annexation is undertaken by the connected mode of circuit theory diagrams.
The LCD display module is a HS12864A graphic dot matrix Liquid Crystal Module.
Power circuit comprises: resistance R 31-R35, capacitor C 12-C22, U10 (AS1117/3v), U11 (AS1117/5v).
The operational process of multifunction high-precision resistance signal generator is: low-power scm C8051F340 is according to keypad information, the resistance error that combining environmental temperature signal and outlet line produce, utilization software compensation algorithm, by driver relay and precision resister network are controlled, the resistance that output requires, and by the corresponding information of the real-time demonstration of LCD.When being used for verification, also can receive current signal from metering circuit or instrument, the ADC module by I/V change-over circuit and single-chip microcomputer enters single-chip microcomputer and processs and displays.With after host computer is connected, can on man-machine interface, carry out various parameter settings by the USB mouth, and on temperature-electric current coordinate diagram, show each checkpoint in real time.
The multifunction high-precision resistance signal generator is realized following function:
1, can be by output of keyboard to set up arbitrary value or the output of self-timing definite value.
2, can select present existing platinum resistance type, or 100 point correspondences of self-defined temperature and resistance value, be convenient to check meter in batches.
3, temperature and resistance value show with screen, exempt from the kilsyth basalt of checking the mark.
4, can calculate the theoretical current value, and compare, calculate and the display error value with the actual current value that collects.
Though carried out optimal design and compensation on the hardware, after the contact resistance of a plurality of relays or the series connection of a plurality of precision resister, cumulative errors still may exceed 0.01 Ω.In order in 0.00～655.35 Ω gamut, to make maximum error, further compensate by software algorithm less than 0.01 Ω.
If after computing machine is connected, developed operation interface, whole system operation carried out centralized control based on LabVIEW.The man-machine interface of system is as shown in drawings: can set arbitrary value output or the output of self-timing definite value in the operation; Can select present existing platinum resistance type, or 100 point correspondences of self-defined temperature and resistance value, on temperature-electric current coordinate diagram, show in real time, be convenient to check meter in batches; Temperature and resistance value show with screen exempts from the kilsyth basalt of checking the mark; Can calculate the theoretical current value, and compare, calculate and the display error value with the actual current value that collects.
The advantage of the utility model multifunction high-precision resistance signal generator is: precision height, output resistance scope are 0.00～655.35 Ω, precision reaches 0.01 Ω, can export or export automatically setting value by arbitrary value, in whole resistance output area, the output resistance maximum error is no more than 0.01 Ω.Have low-power consumption, characteristics such as easy to carry, also have button setting, verification automatically, data storage, with various functions such as computing machine communication and LCD demonstration.This signal source both had been suitable for the measurement in the working site, and partial data is kept in the single-chip microcomputer, can carry out communication by USB interface and computing machine again, conveniently in based on the interface of LabVIEW intuitively thermal resistance etc. was carried out verification.
Description of drawings
Fig. 1 is the outside drawing of precision resister signal generator;
Fig. 2 is the circuit block diagram of precision resister signal generator;
Fig. 3 is the circuit theory diagrams of precision resister signal generator;
Fig. 4 is precision resister signal generator used operation interface when linking to each other with PC;
Embodiment
According to Fig. 1-shown in Figure 4, the utility model multifunction high-precision resistance signal generator comprises: single-chip microcomputer, driving circuit and relay that the C8051F340 model is housed on main circuit board 2, the main circuit board 2 and precision resister network, I/V change-over circuit, USB interface, LCD display module, keyboard interface, power circuit are equipped with in housing 1, housing 1 inside.
The 1-8 pin of driver U2 links to each other respectively with the 30-37 pin of single-chip microcomputer, and the 1-8 pin of driver U3 links to each other respectively with the 22-29 pin of single-chip microcomputer.The LCD display module respectively with single- chip microcomputer 1,2, the 38-48 pin links to each other.7,8,9,12 pin of USB interface and single-chip microcomputer link to each other respectively.The I/V change-over circuit links to each other with single-chip microcomputer 5 pin.Keyboard interface be single-chip microcomputer 6, the 15-21 pin.Driver U8, the U9 of driving circuit and relay link to each other respectively with 16 relays in the precision resister network.
Driving circuit comprises: four driver U2, U3, U8, U9, and model is ULN2803; Four light are every chip, and signal is TLP521-4; And a plurality of resistance and light emitting diode, concrete annexation is undertaken by the connected mode of circuit theory diagrams.
Relay and precision resister network comprise: the relay of 16 precision resisters and 16 little contact resistances.Concrete annexation is undertaken by the connected mode of circuit theory diagrams.16 precision resisters are 0.01,0.02,0.04,0.08,0.16,0.32,0.64,1.28,2.56,5.12,10.24,20.48,40.96,81.92,163.84,327.68, unit: Ω, error is not more than 0.01%).
The I/V change-over circuit comprises: resistance R 1-R6, and capacitor C 6-C9, concrete annexation is undertaken by the connected mode of circuit theory diagrams.
The LCD display module is a HS12864A graphic dot matrix Liquid Crystal Module.
Power circuit comprises: resistance R 31-R35, capacitor C 12-C22, U10 (AS1117/3v), U11 (AS1117/5v).
Claims (4)
1, a kind of multifunction high-precision resistance signal generator, comprise: housing (1), main circuit board (2) is equipped with in housing (1) inside, it is characterized in that: single-chip microcomputer, driving circuit and the relay of C8051F340 model and precision resister network, I/V change-over circuit, USB interface, LCD display module, keyboard interface are housed on the main circuit board (2); The 1-8 pin of the driver U2 of driving circuit links to each other respectively with the 30-37 pin of single-chip microcomputer, and the 1-8 pin of driver U3 links to each other respectively with the 22-29 pin of single-chip microcomputer; The LCD display module respectively with single-chip microcomputer 1,2, the 38-48 pin links to each other; 7,8,9,12 pin of USB interface and single-chip microcomputer link to each other respectively; The I/V change-over circuit links to each other with single-chip microcomputer 5 pin; Keyboard interface be single-chip microcomputer 6, the 15-21 pin; Driver U8, the U9 of driving circuit and relay link to each other respectively with 16 relays in the precision resister network.
2, multifunction high-precision resistance signal generator according to claim 1, it is characterized in that: driving circuit comprises: four driver U2, U3, U8, U9, model is ULN2803; Four light are every chip, and model is TLP521-4; And a plurality of resistance and light emitting diode.
3, multifunction high-precision resistance signal generator according to claim 1 is characterized in that: relay and precision resister network comprise: the relay of 16 precision resisters and 16 little contact resistances.
4, multifunction high-precision resistance signal generator according to claim 1, it is characterized in that: the I/V change-over circuit comprises: resistance R 1-R6, capacitor C 6-C9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200671928U CN201237611Y (en) | 2008-05-14 | 2008-05-14 | Multifunctional high-precision resistor signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200671928U CN201237611Y (en) | 2008-05-14 | 2008-05-14 | Multifunctional high-precision resistor signal generator |
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| Publication Number | Publication Date |
|---|---|
| CN201237611Y true CN201237611Y (en) | 2009-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200671928U Expired - Fee Related CN201237611Y (en) | 2008-05-14 | 2008-05-14 | Multifunctional high-precision resistor signal generator |
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| Country | Link |
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| CN (1) | CN201237611Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749605A (en) * | 2012-07-10 | 2012-10-24 | 哈尔滨工程大学 | Numerical control resistance box |
| CN103995158A (en) * | 2013-02-17 | 2014-08-20 | 上海安科瑞电气股份有限公司 | Signal generator for fault locating of medical isolation power supply system |
| CN104635592A (en) * | 2015-02-12 | 2015-05-20 | 安徽江淮汽车股份有限公司 | Resistance output instrument, testing system and method for outputting different resistance values |
| CN105023677A (en) * | 2015-08-06 | 2015-11-04 | 哈尔滨工业大学 | High-precision adjustable synthesized resistor and automatic test system and method based on same |
| CN105741992A (en) * | 2016-05-06 | 2016-07-06 | 洛阳银杏科技有限公司 | High-precision passive resistance generator for compensating hardware error influence |
-
2008
- 2008-05-14 CN CNU2008200671928U patent/CN201237611Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749605A (en) * | 2012-07-10 | 2012-10-24 | 哈尔滨工程大学 | Numerical control resistance box |
| CN102749605B (en) * | 2012-07-10 | 2014-08-20 | 哈尔滨工程大学 | Numerical control resistance box |
| CN103995158A (en) * | 2013-02-17 | 2014-08-20 | 上海安科瑞电气股份有限公司 | Signal generator for fault locating of medical isolation power supply system |
| CN103995158B (en) * | 2013-02-17 | 2016-10-05 | 安科瑞电气股份有限公司 | A kind of medical treatment insulating power supply system failure signal for positioning generator |
| CN104635592A (en) * | 2015-02-12 | 2015-05-20 | 安徽江淮汽车股份有限公司 | Resistance output instrument, testing system and method for outputting different resistance values |
| CN105023677A (en) * | 2015-08-06 | 2015-11-04 | 哈尔滨工业大学 | High-precision adjustable synthesized resistor and automatic test system and method based on same |
| CN105023677B (en) * | 2015-08-06 | 2017-11-03 | 哈尔滨工业大学 | High accuracy is adjustable combined resistance, Auto-Test System and method based on the combined resistance |
| CN105741992A (en) * | 2016-05-06 | 2016-07-06 | 洛阳银杏科技有限公司 | High-precision passive resistance generator for compensating hardware error influence |
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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: 20090513 Termination date: 20100514 |