CN2743811Y - Isolated platinum resistance temp transmitter - Google Patents
Isolated platinum resistance temp transmitter Download PDFInfo
- Publication number
- CN2743811Y CN2743811Y CN 200420069804 CN200420069804U CN2743811Y CN 2743811 Y CN2743811 Y CN 2743811Y CN 200420069804 CN200420069804 CN 200420069804 CN 200420069804 U CN200420069804 U CN 200420069804U CN 2743811 Y CN2743811 Y CN 2743811Y
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- CN
- China
- Prior art keywords
- platinum resistance
- pin
- circuit
- isolated
- temperature transmitter
- 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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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model discloses a temperature checking device, in particular to a temperature checking device making use of the platinum resistance to check the temperature. The isolated platinum resistance temperature transmitter is composed of a casing and a control wire board. The control wire board is provided with an integrated circuit XTR105 as a platinum resistance signal processing circuit. The ISO122 isolated amplifier is used to isolate the signal. The power conversion circuit uses the DCP010515DP circuit to realize the double-power. The isolated platinum resistance temperature transmitter also can be used as other sensor such as the pressure sensor and the thermocouple signal adjusting circuit. The isolated platinum resistance temperature transmitter has good practicability.
Description
Technical field:
The utility model relates to a kind of detected temperatures device, especially utilizes platinum resistance detected temperatures device.
Background technology:
Platinum resistance is widely used in industry and medicine and hygiene fields as the detected temperatures element, and it is wide that it has the temperature range of measurement, good linearity, and characteristics such as low price are specially adapted to electromechanical integration.Yet the platinum resistance temperature-detecting device of Shi Yonging in the market, normally constitute by amplifier and resistor network on housing and the control circuit board, though cost is lower, but the input signal and the output signal that adopt are one, in use be easy to string and advance undesired signal, make and be easy to generate error when measuring, sometimes even damage detecting instrument equipment, its reason is that line construction complexity, antijamming capability are relatively poor, has a stronger antijamming capability platinum resistance temperature transmitter so market in urgent need is a kind of.
Summary of the invention:
The purpose of this utility model provides the platinum resistance temperature transmitter of the stronger isolation of a kind of antijamming capability, it adopts isolated amplifier that the input signal of power supply is isolated, thereby guarantee that input signal and output signal reach isolation, reach antijamming capability with it, make the influence that is not subjected to field condition when measuring temperature, measure accurate.
The utility model is achieved through the following technical solutions:
Isolating the platinum resistance temperature transmitter is made up of housing, control circuit board, control circuit board is provided with integrated circuit XTR105 as the platinum resistance signal processing circuit, adopt the ISO122 isolated amplifier that signal is isolated, power converting circuit adopts the DCP010515DP circuit; Its pin of integrated circuit XTR105 1 is connected to R
3, W
1, 14 pin meet Pt, and 12 pin meet R
L, R
1, C
1, R
2Be input filtering, 7 pin pass through R
6Ground connection, 10 pin meet power supply+15V, and 8,9,10 pin insert triode BD237; Adopt the ISO122 isolated amplifier, its input is by R
6Sampling, 1 pin is+15V that 2 pin are-15V; The DCP010515DP power converting circuit that adopts, 7085+15V is converted into the power supply of 5V as DCP010515DP, TC7662A handle+15V becomes-and 15V is output as for ISO122 level provides power supply signal, DCP010515DP ± and the elementary power supply signal that provides of ISO122 is provided 15V.
Description of drawings:
The platinum resistance temperature transmitter circuit diagram of the utility model accompanying drawing for isolating.
Embodiment:
Below in conjunction with the accompanying drawing illustrated embodiment the utility model is described in further detail:
Pt is a platinum resistance among the figure, and the circuit diagram of the platinum resistance temperature transmitter of isolation is made of three parts.Signal processing wherein: the two-wire current transducer integrated circuit XTR105 of monolithic 4～20mA that its adopts is as the platinum resistance signal processing circuit, it has, and whole bridge excitation, instrument amplify, linearization, the current output circuit that is used for high resistance strain type sensor necessity, its pin one pin meets R
3, 14 pin meet platinum resistance Pt, and for bridge circuit provides the constant current power supply, 13 pin, 2 pin are input end, and 12 pin connect R
LLine transfer, W
1Withered, W
2Transfer full scale, R
1, C
1, R
2Be input filtering, 7 pin pass through R
6Ground connection, 10 pin meet power supply+15V, and 8,9,10 pin insert triode BD237 output 4～20mA electric current.Power unit in addition: 7805 handle+15V are converted into the power supply of 5V as DCP010515DP, and TC7662A handle+15V becomes-15V, and level provides power supply signal for ISO122 time.Isolated part is arranged again: the isolated amplifier that the utility model is selected for use is the ISO122 of BB company, and the input of ISO122 is by R
6Sampling, 1 pin is+15V that 2 pin are-15V that 7 pin are output terminal.Supply voltage wider range of ISO122 (± 4.5～± 18V); good linearity, non-linear maximum has only 0.05%, and nominal gain is 1; promptly there is not the transmitting function of amplification; power consumption was bigger when its shortcoming was static state, and was dual power supply, so power converting circuit can only be used dual power supply; the utility model has been realized power supply input, output isolation fully; ground wire separates fully, and isolation performance is fine, has thermal cut-out and overload protection function.It has improved the antijamming capability of platinum resistance temperature transmitter, has also protected control system not to be subjected to on-the-spot influence.
Product of the present utility model includes circuit board, housing, and foregoing circuit built-up circuit plate is placed in the housing and constitutes the whole effect that can realize temperature transmitter with sensing element and display unit.
Circuit of the present utility model also can be used as other sensor, as the signal condition of products such as pressure transducer, thermopair, has good practicability.
Claims (4)
1, the platinum resistance temperature transmitter of Ge Liing is made up of housing, control circuit board, it is characterized in that control circuit board is provided with integrated circuit XTR105 as the platinum resistance signal processing circuit, adopt the ISO122 isolated amplifier that signal is isolated, power converting circuit adopts the DCP010515DP circuit.
2,, it is characterized in that the pin one pin of described integrated circuit XTR105 is connected to R according to the platinum resistance temperature transmitter of the described isolation of claim 1
3, W
1, 14 pin meet Pt, and 12 pin connect R
L, R
1, C
1, R
2Be input filtering, 7 pin pass through R
6Ground connection, 10 pin meet power supply+15V, and 8,9,10 pin insert triode BD237.
3, according to the platinum resistance temperature transmitter of the described isolation of claim 1, it is characterized in that the input of described ISO122 isolated amplifier is taken a sample by R6,1 pin is+15V that 2 pin are-15V.
4, according to the platinum resistance temperature transmitter of the described isolation of claim 1, it is characterized in that adopting the DCP010515DP power converting circuit, 7085+15V is converted into the power supply of 5V as DCP010515DP, TC7662A handle+15V becomes-and 15V is output as for ISO122 level provides power supply signal, DCP010515DP ± and the elementary power supply signal that provides of ISO122 is provided 15V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069804 CN2743811Y (en) | 2004-07-16 | 2004-07-16 | Isolated platinum resistance temp transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069804 CN2743811Y (en) | 2004-07-16 | 2004-07-16 | Isolated platinum resistance temp transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2743811Y true CN2743811Y (en) | 2005-11-30 |
Family
ID=35633829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420069804 Expired - Fee Related CN2743811Y (en) | 2004-07-16 | 2004-07-16 | Isolated platinum resistance temp transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2743811Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957243B (en) * | 2009-07-14 | 2012-07-25 | 中国科学院空间科学与应用研究中心 | High-precision temperature measuring device and method |
| CN104990637A (en) * | 2015-07-30 | 2015-10-21 | 安徽中杰信息科技有限公司 | Hazardous chemical temperature acquisition circuit with linear compensation function |
-
2004
- 2004-07-16 CN CN 200420069804 patent/CN2743811Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957243B (en) * | 2009-07-14 | 2012-07-25 | 中国科学院空间科学与应用研究中心 | High-precision temperature measuring device and method |
| CN104990637A (en) * | 2015-07-30 | 2015-10-21 | 安徽中杰信息科技有限公司 | Hazardous chemical temperature acquisition circuit with linear compensation function |
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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 |