CN2352942Y - Flame-proof temperature instrument with on-site display and remote transmission - Google Patents
Flame-proof temperature instrument with on-site display and remote transmission Download PDFInfo
- Publication number
- CN2352942Y CN2352942Y CN 97241538 CN97241538U CN2352942Y CN 2352942 Y CN2352942 Y CN 2352942Y CN 97241538 CN97241538 CN 97241538 CN 97241538 U CN97241538 U CN 97241538U CN 2352942 Y CN2352942 Y CN 2352942Y
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- CN
- China
- Prior art keywords
- teletransmission
- sensor
- instrument
- spot
- flame proof
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 230000005540 biological transmission Effects 0.000 title abstract 3
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 4
- 238000004880 explosion Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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Abstract
The utility model relates to a flame proof temperature instrument of on-the-spot demonstration and teletransmission, this instrument have an explosion-proof shell, are equipped with the circuit in the shell and always adorn the board, and liquid crystal LED shows, and the terminal box terminal system realizes the sensing through two sensors Rt1 and Rt2 output heat-sensitive electric signal that are equipped with on the casing, and the function of transmission demonstration, teletransmission integration. The real-site display mode is completed by a sensor Rt1 through amplifier linear compensation and A/D conversion digital display; the remote transmission is realized by the sensor Rt2, and a measuring signal is transmitted to the instrument control room through a cable of the binding post.
Description
The utility model belongs to the instrumentation table field, especially for the instrument of measuring temperature.
In technique known, normally used temperature instrumentation is pointer flame proof measurement instrument, and the structure of this instrument is to utilize magnet and coil to drive pointer to carry out the deflection indication, so test error is big, and sensitivity is low, and antidetonation not, and can not teletransmission.
The purpose of this utility model be overcome the deficiency of prior art and provide a kind of can on-the-spot displays temperature, can export the flame proof thermometric instrument that thermistor signal is carried out teletransmission when advancing again.
Realize that the scheme that the purpose of this utility model is taked is: this instrument has an explosion-resistant enclosure, and circuit general assembly plate is housed in the housing, and is provided with liquid crystal LED display part, and sidepiece is provided with terminal box, and lower part of frame is equipped with two sensor Rt1 and Rt2.
Realize that the on-the-spot measurement temperature that shows is by sensor Rt1 temperature value measured to be converted to corresponding resistance signal, by bridge circuit difference mode signal is sent in the amplifier and to be amplified, and, demonstrate concrete temperature value by the A/D conversion from the LED digitizing tablet at last through linear compensation.Realize that teletransmission is by sensor Rt2 the cable of measuring-signal by binding post to be transmitted in the pulpit.
Realize the circuit square frame implementation of on-the-spot demonstration and teletransmission: sensor Rt1 → amplifier → linear compensation → A/D conversion → numeral shows that sensor Rt1----------------------→ teletransmission is to the metering house
This instrument in the utility model has realized the sensing change is sent owing to adopted such scheme, shows and the incorporate function of teletransmission.Owing to adopted bridge circuit and linear compensation circuit, reduced measuring error, improve sensitivity, and adopted the explosion-proof instrument housing of ZL104, improved explosion-proof performance.
Utilize accompanying drawing to further describe embodiment of the present utility model below.
Fig. 1 is the utility model structural representation;
Fig. 2 is the sectional view of A-A among Fig. 1;
Fig. 3 is Fig. 1 terminal box internal wiring terminal synoptic diagram;
Fig. 4 is the electrical schematic diagram of circuit general assembly plate.
Referring to Fig. 1, this instrument has a housing 1, and shell is stopped on 1 and by screw 3 is installed sensor Rt1 and Rt2 is housed, and is embedded in the same sensor protection pipe.The sidepiece of housing 1 is equipped with terminal box 4, is provided with 4 binding posts 5 in the box, and the panel of housing 1 is provided with the LED numeral and shows that label 6 is the circuit mouths that are used for binding post teletransmission cable.
Referring to Fig. 2, housing 1 is divided into up and down two parts, by trip bolt 10 two parts is fixed together, and circuit general assembly plate 7 is equipped with in the bottom in the housing, and cloche 9 and packing washer 8 are equipped with routinely in top on the panel that numeral shows.
Referring to Fig. 3, be the mode of connection of terminal box internal wiring terminal, A, B binding post connect power supply, and the CD binding post connects the teletransmission cable.
Referring to Fig. 4, it is circuit general assembly plate electrical schematic diagram, A, B connect power supply among the figure, form bridge circuit by sensor Rt1 and resistance and receive temperature reception measured temperature, this value is converted to difference mode signal, enters into integrated amplifier IC and carry out the signal amplification, realized linear compensation simultaneously, convert digital signal to by A/D then, LED shows by liquid crystal.
C among the figure, D are the modes of connection that sensor Rt2 realizes teletransmission.
Claims (3)
1, a kind of on-the-spot teletransmission and flame proof thermometric instrument of showing has an explosion-resistant enclosure, it is characterized in that: circuit dress plate [7] is housed in the housing 1, and is provided with liquid crystal LED and shows that [2] sidepiece is provided with terminal box [4], lower part of frame is equipped with two sensor Rt.
2, a kind of on-the-spot teletransmission and flame proof thermometric instrument of showing as claimed in claim 1, it is characterized in that: the on-the-spot demonstration is by sensor Rt1 temperature value measured to be converted to corresponding resistance signal, by bridge-type differential mode is doubly sent in the amplifier and to be amplified, and, demonstrate concrete temperature value by the A/D conversion from the LED digitizing tablet at last through linear compensation; Realize that teletransmission is by Rt2 the cable of measuring-signal by binding post to be transmitted in the pulpit.
3, a kind of on-the-spot demonstration as claimed in claim 1 or 2 passes and the flame proof thermometric instrument, it is characterized in that: be provided with 4 binding post A, B, C, D in the terminal box [4].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97241538 CN2352942Y (en) | 1997-11-26 | 1997-11-26 | Flame-proof temperature instrument with on-site display and remote transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97241538 CN2352942Y (en) | 1997-11-26 | 1997-11-26 | Flame-proof temperature instrument with on-site display and remote transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2352942Y true CN2352942Y (en) | 1999-12-08 |
Family
ID=33950981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97241538 Expired - Fee Related CN2352942Y (en) | 1997-11-26 | 1997-11-26 | Flame-proof temperature instrument with on-site display and remote transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2352942Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496392A (en) * | 2011-12-01 | 2012-06-13 | 刘立文 | Explosion-proof instrument shell |
-
1997
- 1997-11-26 CN CN 97241538 patent/CN2352942Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496392A (en) * | 2011-12-01 | 2012-06-13 | 刘立文 | Explosion-proof instrument shell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |