CN2103801U - Safety intelligence thermometer for roving inspection and display - Google Patents
Safety intelligence thermometer for roving inspection and display Download PDFInfo
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- CN2103801U CN2103801U CN 91222183 CN91222183U CN2103801U CN 2103801 U CN2103801 U CN 2103801U CN 91222183 CN91222183 CN 91222183 CN 91222183 U CN91222183 U CN 91222183U CN 2103801 U CN2103801 U CN 2103801U
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Abstract
The utility model relates to a safety intelligent thermometer for roving inspection and display belonging to the technical field of meters for automation. The utility model is composed of signal acquisition units 1-1 to 1-8, a power converter unit 1-9, a main control unit 1-10, and a keyboard display unit 1-11. The signal acquisition units comprise an electronic switch switchover part 2-1, an intelligent simulation digital conversion part 2-2, an isolation limiting power part 2-3 and an isolation communicating part 2-4. The utility model has the advantages that the precision can reach 0.1 grade, the safety intelligent thermometer for roving inspection and display has a programmable function, the safety intelligent thermometer for roving inspection and display can be automatically inspected and corrected, and the safety intelligent thermometer for roving inspection and display can be communicated with a supervisory computer. The safety intelligent thermometer for roving inspection and display also has the advantages of low cost, high reliability, convenient use, etc.
Description
The utility model belongs to the automation instrument technology field, relates to a kind of Sefe antiexplosion type multi-point temp and detects and the warning intelligence instrument.
At present, domestic also do not have to be used for the thermal resistance in explosion hazard place and a multi-point temp roving inspection and display table that thermopair directly is used, being to adopt a multi-point temp to patrol and examine table in the practical application now, is 20 points as the temperature patrol inspection point, must cooperate with 20 single-point temperature safety barriers; Or cooperate with a single-point temperature indicator with an one-point safety spark-type temperature transmitter, form some system for detecting temperature.If 140 temperature survey points are arranged, just need to cooperate 140 of temperature safety barriers with 7 of 20 temperature patrol inspection instrument, just can finish 140 temperature essential safety and detect; If cooperate the single-point temperature indicator with the intrinsically safe type temperature transmitter, just can finish 140 essential safety temperature surveys with regard to handy 140 intrinsically safe type temperature transmitters and 140 single-point temperature indicators.
The purpose of this utility model has solved exactly and has been used for the needed instrument of explosion hazard place multipoint temperature measuring alarm indication.Can thermopair and thermal resistance direct and the explosion hazard place be used, finish the essential safety intelligent temperature and patrol and examine the newspaper measuring system.
Be described in detail principle of work of the present utility model below in conjunction with accompanying drawing.
Fig. 1 is an essential safety intelligent temperature roving inspection and display theory diagram, constitute by 11 element circuits, wherein 1--1 to 1--8 is eight identical thermopairs and thermal resistance signal collecting unit, 1--9 is the power supply converter unit, 1--10 is a main control unit, and 1--11 is the display keyboard unit, and Fig. 2 is thermopair and thermal resistance signal collecting unit theory diagram, be made of 4 parts, wherein 2--1 is the sub-electronic switch switching part of resistance current-limiting type level Four; 2--2 is an artificial intelligence digital conversion part, and 2--3 isolates limit energy power pack, and 2--4 isolates communication part.The utility model course of work is to realize like this, input signal thermopair (employing two-wire system), thermal resistance (employing three-wire system) the sub-electronic switch switching part of resistance current-limiting type level Four 2--1 direct and among the signal gathering unit 1--1 to 1--8 is connected, through artificial intelligence digital conversion part 2--2 conversion, Rt and Et signal changed into convert to again after the 0--2VDC DC voltage and the direct corresponding digital quantity of input signal, and send this signal to main control unit 1--10 by isolating communication part 2--4, this element transmits order again and carries out controls such as channel gain for signal gathering unit 1--1 to 1--8, go forward side by side and send display keyboard unit 1--11 to show the actual temperature measured value after operational data such as line nonlinearity correction is handled, and off-limit alarm function and alarm set point output are provided, and teletransmission communication data output.
Each thermopair and thermal resistance signal collecting unit have 12 input points, input signal be can set with the programmed settings method at every and any one thermopair and thermoelectric resistance body calibration number are, every roving inspection and display can be adorned 1 to 8 block signal collecting unit, that is: 1--1 to 1--8, thereby also just can be input as 12 points, at 24 until maximum 96 instrument, so just guaranteed with thermopair and thermoelectric resistance body directly cooperate form the essential safety multi-point temp patrol and examine report achievement can realization.
In each thermopair and thermoelectric resistance body signal gathering unit, the sub-electronic switch switching part of strip resistance current-limiting type level Four 2--1 is arranged, as shown in Figure 3, its principle of work is that Ril, Rvt are current-limiting resistance, and be connected with simulation electronic change-over switch 3--1 to 3--6, finish 12 input points are switched, Ilai and Ilbi are the constant current source input, and Vtao and Vtbo are output voltage.
In addition, be the method control transformation precision that adopts control ICL7135 clock frequency in having the artificial intelligence digital conversion part 2--2 of gamut self-correcting function.
The utility model advantage is: can realize every some input signal calibration by the program of working out in advance; Patrol and examine the selection of the selection of counting, type of alarm and alarming value etc. at most.To have precision be 0.1 grade to this logging simultaneously, has programmable functions, has self check self-correcting function, has and the upper machine communication function, and essential safe type also has characteristics such as cost is low, and reliability is high and easy to use.
Fig. 1 is a Sefe antiexplosion intelligent temperature roving inspection and display functional-block diagram.
Fig. 2 is thermopair and thermal resistance signal collecting unit functional-block diagram.
Fig. 3 is resistance current-limiting type quadrapole electronic switch transfer principle figure.
Fig. 4 is artificial intelligence digital conversion partial circuit figure.
Fig. 5 can the power pack circuit diagram for isolating limit.
Fig. 6 is for isolating the communication part circuit diagram.
Wherein: 1--1 to 1--8 is that thermopair and thermal resistance signal collecting unit, 1--9 power supply converter unit, 1--10 main control unit, 1--11 display keyboard unit, the sub-electronic switch switching part of 2--1 resistance current-limiting type level Four, 2--2 are that artificial intelligence digital conversion part, 2--3 are that isolation limit energy power pack, 3--1 to 3--6 are current-limiting resistance for simulation switching electronic switch, Rit and Rvt.
Embodiment: assemble by the element model of marking among Fig. 1 to Fig. 6 circuit and each figure, the input pre-set program can be realized that the essential safety intelligent temperature is patrolled and examined and patrol the energy of reporting achievement.
Claims (4)
1, a kind of Sefe antiexplosion intelligent temperature roving inspection and display, form by power supply converter unit 1--9, main control unit 1--10, display keyboard unit 1--11 etc., it is characterized in that: input signal thermopair, thermal resistance directly are connected with the sub-electronic switch switching part of resistance current-limiting type level Four 2--1 among the signal gathering unit 1--1 to 1--8, pass through artificial intelligence digital conversion part 2--2 conversion.Become the 0--2VDC DC voltage to convert to again and the direct corresponding digital quantity of input signal with the Et conversion of signals Rt, and send this signal to main control unit 1--10 by isolating communication part 2--4, this element transmits order again and carries out controls such as channel gain for signal gathering unit 1--1 to 1--8, go forward side by side and send display keyboard unit 1--11 to show the actual temperature measured value after operational data such as line nonlinearity correction is handled, and off-limit alarm function and alarm set point output are provided, and teletransmission communication data output.
2, roving inspection and display according to claim 1, it is characterized in that: each thermopair and thermal resistance signal collecting unit have 12 input points, can set input signal with the programmed settings method at every and be any one thermopair and thermoelectric resistance body calibration number, it is 1--1 to 1--8 that every roving inspection and display can be adorned 1 to 8 block signal collecting unit.
3, according to claim 1 and 2 described roving inspection and displays, it is characterized in that: the sub-electronic switch switching part of strip resistance current-limiting type level Four 2--1 is arranged in each signal gathering unit, wherein current-limiting resistance is connected with simulant electronic switch 3--1 to 3--6, finishes 12 input points are switched.
4, according to claim 1 and 2 described roving inspection and displays, it is characterized in that having among the artificial intelligence digital conversion part 2--2 of gamut self-correcting function, adopt the method control transformation precision of control ICL7135 clock frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222183 CN2103801U (en) | 1991-09-13 | 1991-09-13 | Safety intelligence thermometer for roving inspection and display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222183 CN2103801U (en) | 1991-09-13 | 1991-09-13 | Safety intelligence thermometer for roving inspection and display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2103801U true CN2103801U (en) | 1992-05-06 |
Family
ID=4929084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91222183 Granted CN2103801U (en) | 1991-09-13 | 1991-09-13 | Safety intelligence thermometer for roving inspection and display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2103801U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402997C (en) * | 2006-08-10 | 2008-07-16 | 中华人民共和国天津出入境检验检疫局 | Detection system of fuel gas burner safety use environment temperature |
| CN100456005C (en) * | 2004-03-31 | 2009-01-28 | 西铁城控股株式会社 | Electronic clinical thermometer |
-
1991
- 1991-09-13 CN CN 91222183 patent/CN2103801U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456005C (en) * | 2004-03-31 | 2009-01-28 | 西铁城控股株式会社 | Electronic clinical thermometer |
| CN100402997C (en) * | 2006-08-10 | 2008-07-16 | 中华人民共和国天津出入境检验检疫局 | Detection system of fuel gas burner safety use environment temperature |
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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 |