CN87208972U - Intelligent multi-channel temperature measurer - Google Patents
Intelligent multi-channel temperature measurer Download PDFInfo
- Publication number
- CN87208972U CN87208972U CN 87208972 CN87208972U CN87208972U CN 87208972 U CN87208972 U CN 87208972U CN 87208972 CN87208972 CN 87208972 CN 87208972 U CN87208972 U CN 87208972U CN 87208972 U CN87208972 U CN 87208972U
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- temperature measurer
- resistance
- circuit
- utility
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Abstract
The utility model discloses an automatic temperature measurer which adopts the compensating circuit of the transferring conductor resistor and a plurality of sampling switching circuits to directly measure the thermal resistor of a temperature measuring element. The automatic temperature measurer also matches with a chip microcomputer, and the systems of the display, the alarm, the printing, etc., to control the measuring process. The functions of the measurement, the computation, the alarm and the timing printing are realized. The automatic temperature measurer can directly match with the temperature measuring elements such as the platinum resistor, the thermocouple, etc. The measuring range is-20 DEG C to 150 DEG C. The utility model has the advantages of compact structure, simple operation, convenient field installation, convenient adjustment and convenient maintenance, and is applied to the power plant and any other industrial field.
Description
The utility model belongs to a kind of automatic measuring instrument, can directly connect temperature elements such as platinum resistance, thermopair and P-N knot and carry out temperature survey.
The monitoring of temperature is the important means that guarantees the normal operation of commercial unit.Temperature as the generating plant electricity generator stator coil is the key parameters of generator operation, needs accurately to measure and can in time report to the police when temperature is out-of-limit.And present domestic most power plant adopt resistance ratios meter or intumescent thermometer, and poor reliability can't be keeped in repair.Some power plant adopt the digital temperature survey monitor of 40 on SXB-40 type.This instrument is transistorized digital instrument, and topmost shortcoming is that 40 of this instrument patrol that to survey be to realize by 40 dry-reed relays adhesive successively.The dry-reed relay life-span is limited, often breaks down, and this instrument is not printed the tabulation function in addition, does not have communication interface, use, inconvenient maintenance.Some equipment advanced persons' power plant adopts microcomputer to temperature patrol inspection, generally all needs temperature transmitter, and each road is provided with one, and adds amplifier, circuit burden, and be difficult to accomplish that the enlargement factor on each road is strict equal.Investment is big, is difficult for promoting.
Task of the present utility model is that development is a kind of reliable, uses simply, and easy to maintenance, cost Di ， And can finish the multichannel temperature measurement instrument of multiple function.
Solution of the present utility model is, it is by transfer wire compensating resistance circuit, multi-channel sampling switch circuit, computer main frame panel, show and alarm control circuit, mini-printer, compositions such as D.C. regulated power supply, and be assembled in the cabinet, the multi-channel sampling switch circuit design has the constant current source resistance R, multiway analog switch, operational amplifier, electric voltage/frequency converter etc.Like this, instrument has adopted multi-channel electronic switch to replace dry-reed relay, does not need temperature transmitter, can directly obtain the pressure drop of temperature element thermal resistance, realizes functions such as control, calculating, demonstration, printing warning by microcomputer.
Embodiment and principle of work below in conjunction with this instrument of description of drawings.
Fig. 1 is the utility model circuit block diagram
Fig. 2 is a multi-channel sampling switch circuit structure schematic diagram
Fig. 3 is the utility model external structure front view
Fig. 4 is the utility model external structure rear view
Referring to Fig. 1, RT
1To RT
40Be the resistance of 40 road resistance thermometer clements, (1) is transfer wire compensating resistance circuit, wherein RX
1To RX
40Be compensating resistance, each road transmission line can be fitted on identical resistance, do unified compensation by computing machine again, form the measuring error that integral body is brought with the resistance value of avoiding transfer wire to have certain resistance value and resistance thermometer clement.(2) be the multi-channel sampling switch circuit, (3) are computer main frame panel, and it adopts 8 single chip microcomputer 8039 chips, and (4) are demonstration, keyboard and alarm control circuit, and (5) are mini-printer, and (6) are D.C. regulated power supply, and it is made up of the standard regulator block.
Referring to Fig. 2, the multi-channel sampling switch circuit comprises constant current source resistance R, R
1To R
40Be 40 constant current resistance, (7) are multiway analog switch, and (8) are operational amplifier, and (9) are the voltage/frequency transducer, and (10) are photoelectric isolating device, and (11) are code translator, and it adopts address decoder.
Among Fig. 3, Fig. 4, mini-printer (5) is housed on the front panel of this instrument, shows charactron (12), button (13), power switch (14) is equipped with input end (15) on the rear panel, communication interface (16), warning output terminal (17), supply hub (18), fuse (19).
Measuring principle of the present utility model is: because resistance thermometer clement is embedded in the generator coil, each road transfer wire has different resistance values, by compensating resistance circuit (1), each road transmission line is fitted on identical resistance, the approximate constant current source that adopts stabilized voltage supply (6) and constant current source resistance R to form, convert thermal resistance signal to voltage signal, multiway analog switch (7) conducting successively under computing machine (3) management, measured value is delivered to electric voltage/frequency converter (9) through operational amplifier (8) be converted to frequency signal, deliver to computer main frame panel (3) through photoelectric isolating device (10) then and calculate corresponding temperature value, after treatment, may command shows.Keyboard, warning circuit (4) are realized function corresponding, deliver to mini-printer (5) and print.
Adopt this instrument to have the following advantages
1, replaces traditional dry-reed relay with contactless electronic analog swtich, improved the reliability of long-time running.
2, can replace transmitter, with power plant Central Control Room HPI, very strong local preprocessing function be arranged, reduce cost, save investment, obvious economic benefit is arranged.
3, compact conformation, processing ease, debugging and easy to maintenance, and have the expansion communication interface.
This instrument can detect multi way temperature, can directly connect the copper platinum resistance, and temperature-measuring range is at-20 ℃～150 ℃, and sample rate is 100 milliseconds/road, show and the warning precision be ±/℃.
Claims (2)
1, a kind of intelligent multichannel temperature measuring set is characterized in that; It is by transfer wire compensating resistance circuit (1), multi-channel sampling switch circuit (2), and computer main frame panel (3), display keyboard and alarm control circuit (4), mini-printer (5), D.C. regulated power supply (6) is formed, and is contained in the cabinet.
2, intelligent multichannel temperature measuring set according to claim 1, it is characterized in that multi-channel sampling switch circuit (2) includes the constant current source resistance R, multiway analog switch (7), operational amplifier (8), voltage/frequency transducer (9), photoelectric isolating device (10) and code translator (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208972 CN87208972U (en) | 1987-06-11 | 1987-06-11 | Intelligent multi-channel temperature measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208972 CN87208972U (en) | 1987-06-11 | 1987-06-11 | Intelligent multi-channel temperature measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87208972U true CN87208972U (en) | 1988-03-23 |
Family
ID=4824142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87208972 Withdrawn CN87208972U (en) | 1987-06-11 | 1987-06-11 | Intelligent multi-channel temperature measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87208972U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101565C (en) * | 1996-05-30 | 2003-02-12 | 中国石油化工集团公司抚顺石油化工研究院 | Double-circuit temp.-indicating controller |
| CN100383491C (en) * | 2004-12-29 | 2008-04-23 | 中国科学院空间科学与应用研究中心 | Temperature acquisition system in multiple channels suitable to examination of microgravity liquid |
| CN100416244C (en) * | 2003-12-27 | 2008-09-03 | 中国科学院近代物理研究所 | Preprocessing circuit for multiple temperature signals |
| CN101551279B (en) * | 2008-12-26 | 2011-06-08 | 深圳市合信自动化技术有限公司 | Multi-channel thermocouple signal acquisition and measurement device |
| CN105241566A (en) * | 2015-11-13 | 2016-01-13 | 哈尔滨东安发动机（集团）有限公司 | High-speed temperature measurement device |
| CN105651412A (en) * | 2016-02-03 | 2016-06-08 | 河南柴油机重工有限责任公司 | Measurement method and measurement circuit for PT1000 temperature sensor |
| CN111609946A (en) * | 2020-06-19 | 2020-09-01 | 北京卫星环境工程研究所 | High-integration multifunctional temperature measuring device for outfield test |
-
1987
- 1987-06-11 CN CN 87208972 patent/CN87208972U/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101565C (en) * | 1996-05-30 | 2003-02-12 | 中国石油化工集团公司抚顺石油化工研究院 | Double-circuit temp.-indicating controller |
| CN100416244C (en) * | 2003-12-27 | 2008-09-03 | 中国科学院近代物理研究所 | Preprocessing circuit for multiple temperature signals |
| CN100383491C (en) * | 2004-12-29 | 2008-04-23 | 中国科学院空间科学与应用研究中心 | Temperature acquisition system in multiple channels suitable to examination of microgravity liquid |
| CN101551279B (en) * | 2008-12-26 | 2011-06-08 | 深圳市合信自动化技术有限公司 | Multi-channel thermocouple signal acquisition and measurement device |
| CN105241566A (en) * | 2015-11-13 | 2016-01-13 | 哈尔滨东安发动机（集团）有限公司 | High-speed temperature measurement device |
| CN105651412A (en) * | 2016-02-03 | 2016-06-08 | 河南柴油机重工有限责任公司 | Measurement method and measurement circuit for PT1000 temperature sensor |
| CN105651412B (en) * | 2016-02-03 | 2018-09-11 | 河南柴油机重工有限责任公司 | A kind of measurement method and measuring circuit for PT1000 temperature sensors |
| CN111609946A (en) * | 2020-06-19 | 2020-09-01 | 北京卫星环境工程研究所 | High-integration multifunctional temperature measuring device for outfield test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |