CN201421375Y - Novel intelligent temperature transducer - Google Patents
Novel intelligent temperature transducer Download PDFInfo
- Publication number
- CN201421375Y CN201421375Y CN2009200996233U CN200920099623U CN201421375Y CN 201421375 Y CN201421375 Y CN 201421375Y CN 2009200996233 U CN2009200996233 U CN 2009200996233U CN 200920099623 U CN200920099623 U CN 200920099623U CN 201421375 Y CN201421375 Y CN 201421375Y
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- circuit
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- output terminal
- input end
- intelligent temperature
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- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The utility model discloses a novel intelligent temperature transducer, which mainly solves the problems of poor zero point stability, troublesome non-linear compensation and low accuracy in the priortemperature transducer. The intelligent temperature transducer is characterized in that the transducer comprises a cold junction compensator (2), a multi-channel switcher (3), a magnifying sampling holder (4), an analog-to-digital converter (5), a control circuit (6), a two-way digital-to-analog converter (7) and a voltage and current converter circuit (8). The novel intelligent temperature transducer has the characteristics of good zero point stability, convenient non-linear compensation and high accuracy.
Description
Technical field:
The utility model relates to the required temperature transmitter of electronic measuring instrument field temperature survey, especially a kind of novel intelligent temperature transmitter.
Background technology:
Temperature transmitter is used widely in a lot of fields.But zero stability is poor because reasons in structure exists, nonlinear compensation bothers and the low problem of precision, influences result of use.
The utility model content:
Existing temperature transmitter zero stability is poor in order to solve, nonlinear compensation bothers and the low problem of precision, the utility model provides a kind of novel intelligent temperature transmitter, and this a kind of novel intelligent temperature transmitter has that zero stability is good, nonlinear compensation is convenient and the high characteristics of precision.
The technical solution of the utility model is: this a kind of novel intelligent temperature transmitter comprises cabinet and microcomputer circuit, is made up of junction compensator, multi-channel switcher, amplification sampling holder, analog to digital converter, control circuit, two-way digital to analog converter, voltage current transformating circuit;
Above-mentioned microcomputer circuit is connected with display and keyboard by parallel interface;
Above-mentioned junction compensator is as operational amplifier, and one of them input end connects two thermocouple output signals, another input end grounding, and output terminal links to each other with the signal input part of multi-channel switcher;
The output terminal of above-mentioned multi-channel switcher is connected with amplification sampling holder circuit, amplifying the sampling holder output terminal links to each other with the analog to digital converter input end, the analog to digital converter output terminal links to each other with microcomputer circuit data general line, two-way digital to analog converter input end links to each other with microcomputer circuit data general line, two-way digital to analog converter output terminal links to each other with the voltage current transformating circuit input end, the control circuit input end links to each other with the microcomputer circuit output terminal, and the control circuit output terminal links to each other with multi-channel switcher multiple tracks selecting side.
The utlity model has following beneficial effect: this a kind of novel intelligent temperature transmitter is owing to take such scheme, owing to utilized microcomputer circuit 1, thereby the measured value of display digit amount intuitively.Because of adopting curve-fitting method, improve the nonlinear compensation precision, can finish the change of two-way temperature signal simultaneously and send.Because of adopting junction compensator 2, overcome the unsettled shortcoming of analog instrument zero.This a kind of novel intelligent temperature transmitter has that zero stability is good thus, nonlinear compensation is convenient and the high characteristics of precision.
Description of drawings:
1-microcomputer circuit among the figure, the 2-junction compensator, the 3-multi-channel switcher, 4-amplifies sampling holder, 5-analog to digital converter, 6-control circuit, 7-two-way digital to analog converter, 8-voltage current transformating circuit.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
Shown in accompanying drawing, this a kind of novel intelligent temperature transmitter comprises cabinet and microcomputer circuit 1, is made up of junction compensator 2, multi-channel switcher 3, amplification sampling holder 4, analog to digital converter 5, control circuit 6, two-way digital to analog converter 7, voltage current transformating circuit 8; Junction compensator 2 adopts AD7502, amplifies sampling holder 4 and is made up of AD524 amplifier, LM208 amplifier, the AD582 sampling holder of series connection successively, and analog to digital converter 5 adopts AD574A.
Above-mentioned microcomputer circuit 1 is connected with display and keyboard by parallel interface;
Above-mentioned junction compensator 2 is as operational amplifier, and one of them input end connects two thermocouple output signals, another input end grounding, and output terminal links to each other with the signal input part of multi-channel switcher 3;
The output terminal of above-mentioned multi-channel switcher 3 is connected with amplification sampling holder 4 circuit, amplifying sampling holder 4 output terminals links to each other with analog to digital converter 5 input ends, analog to digital converter 5 output terminals link to each other with microcomputer circuit 1 data general line, two-way digital to analog converter 7 input ends link to each other with microcomputer circuit 1 data general line, two-way digital to analog converter 7 output terminals link to each other with voltage current transformating circuit 8 input ends, control circuit 6 input ends link to each other with microcomputer circuit 1 output terminal, and control circuit 6 output terminals link to each other with multi-channel switcher 3 hyperchannel selecting sides.
Principle of work has been solidified the management application software that is used for calculation process and control in the ROM (read-only memory) in the microcomputer circuit 1, and has stored with the mode of curve fitting and set up the thermoelectric curve mathematic model of electric thermo-couple temperature.The temperature signal of two-way thermopair is after latch is selected one, the compensating signal of sending with junction compensator 2 enters multi-channel switcher 3 together, send in the amplification sampling holder that amplifies in the sampling holder 4 after two-stage amplifier in amplifying sampling holder 4 amplifies again and keep, the simulating signal of amplifying sampling holder 4 outputs is converted to ten binary digit signals through analog to digital converter, after this digital data carries out computing and processing by microprocessor in the microcomputer circuit 1, convert the two-way analog quantity to through 2 two-way digital to analog converters 7 respectively on the one hand, again by voltage current transformating circuit 8 output two-way 4-20 milliampere current signals, send display through parallel interface on the other hand, by the measured temperature of display display digit amount.Keyboard is used for the switching and the instrument panel operation of input channel.In sum, this a kind of novel intelligent temperature transmitter is owing to adopt microcomputer circuit 1, thereby the measured value of display digit amount intuitively.Because of adopting curve-fitting method, improve the nonlinear compensation precision, can finish the change of two-way temperature signal simultaneously and send.Because of adopting junction compensator 2, overcome the unsettled shortcoming of analog instrument zero.
Claims (1)
1, a kind of novel intelligent temperature transmitter, comprise cabinet and microcomputer circuit (1), junction compensator (2), multi-channel switcher (3), amplify sampling holder (4), analog to digital converter (5), control circuit (6), two-way digital to analog converter (7), voltage current transformating circuit (8), it is characterized in that:
Above-mentioned microcomputer circuit (1) is connected with display and keyboard by parallel interface;
Above-mentioned junction compensator (2) is as operational amplifier, and one of them input end connects two thermocouple output signals, another input end grounding, and output terminal links to each other with the signal input part of multi-channel switcher (3);
The output terminal of above-mentioned multi-channel switcher (3) is connected with amplification sampling holder (4) circuit, amplifying sampling holder (4) output terminal links to each other with analog to digital converter (5) input end, analog to digital converter (5) output terminal links to each other with microcomputer circuit (1) data general line, two-way digital to analog converter (7) input end links to each other with microcomputer circuit (1) data general line, two-way digital to analog converter (7) output terminal links to each other with voltage current transformating circuit (8) input end, control circuit (6) input end links to each other with microcomputer circuit (1) output terminal, and control circuit (6) output terminal links to each other with multi-channel switcher (3) multiple tracks selecting side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200996233U CN201421375Y (en) | 2009-04-20 | 2009-04-20 | Novel intelligent temperature transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200996233U CN201421375Y (en) | 2009-04-20 | 2009-04-20 | Novel intelligent temperature transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201421375Y true CN201421375Y (en) | 2010-03-10 |
Family
ID=41808035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200996233U Expired - Fee Related CN201421375Y (en) | 2009-04-20 | 2009-04-20 | Novel intelligent temperature transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201421375Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674307A (en) * | 2013-12-09 | 2014-03-26 | 杨烁 | Error calibration component and temperature transmitter with same |
| CN105509809A (en) * | 2015-12-20 | 2016-04-20 | 成都霍睦斯电气有限公司 | Temperature transmitter with detection function |
-
2009
- 2009-04-20 CN CN2009200996233U patent/CN201421375Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674307A (en) * | 2013-12-09 | 2014-03-26 | 杨烁 | Error calibration component and temperature transmitter with same |
| CN103674307B (en) * | 2013-12-09 | 2016-06-22 | 杨烁 | Calibrate for error element and the temperature transmitter with this element |
| CN105509809A (en) * | 2015-12-20 | 2016-04-20 | 成都霍睦斯电气有限公司 | Temperature transmitter with detection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Daqing Tianhong Technology Co., Ltd. Assignor: Feng Xiaoping Contract record no.: 2010230000022 Denomination of utility model: Novel intelligent temperature transducer Granted publication date: 20100310 License type: Exclusive License Record date: 20100521 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100310 Termination date: 20130420 |