CN201583361U - Flash point apparatus temperature measuring device - Google Patents
Flash point apparatus temperature measuring device Download PDFInfo
- Publication number
- CN201583361U CN201583361U CN2009202820828U CN200920282082U CN201583361U CN 201583361 U CN201583361 U CN 201583361U CN 2009202820828 U CN2009202820828 U CN 2009202820828U CN 200920282082 U CN200920282082 U CN 200920282082U CN 201583361 U CN201583361 U CN 201583361U
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- signal
- temperature measuring
- module
- flash point
- sensor
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Abstract
A flash point apparatus temperature measuring device belongs to the temperature measuring equipment field and comprises a temperature sensor, a constant flow source module, a signal protection module and a signal amplification module; the output end of the constant flow source module is connected with the temperature sensor; the temperature measuring device is characterized in that: the temperature sensor adopts a three-wire thermal resistor, the output end of the three-wire thermal resistor is connected with the input end of the signal protection module, the output end of the signal protection module is connected with the input end of the signal amplification module. As the three-wire thermal resistor PT100 as the sensor for collecting temperature signals, the flash point apparatus temperature measuring device has long transmission distance, stable system, realizes accurate detection, strong anti-interference capacity and detects the measured temperatures in real time.
Description
Technical field
The utility model provides a kind of flash point tester temperature measuring equipment, belongs to the temperature measurement equipment field.
Background technology
In the petrochemical complex Development Analysis, often use the lightning instrument.Traditional flash point tester temperature measuring equipment adopts the two-wire system thermometric, and shortcoming is that transmission range is short, is disturbed easily in industry spot, and measuring accuracy is poor.
The utility model content
According to above deficiency of the prior art, problem to be solved in the utility model is: provide a kind of long transmission distance, strong interference immunity, the flash point tester temperature measuring equipment that measuring accuracy is high.
The technical scheme that its technical matters that solves the utility model adopts is: the flash point tester temperature measuring equipment; comprise temperature sensor, constant current source module, signal protection module and signal amplification module; the output terminal of constant current source module connects temperature sensor; it is characterized in that: temperature sensor is set adopts the three-wire system thermal resistance sensor; the output terminal of three-wire system thermal resistance sensor connects the input end of signal protection module, and the output terminal of signal protection module connects the input end of signal amplification module.
The constant current source module produces constant current source and gives the power supply of three-wire system thermal resistance sensor.The three-wire system thermal resistance sensor is measured temperature and is produced voltage signal, through the signal protection module signal is protected then, and after the signal amplification module amplifies the voltage of the temperature correspondence of measuring, the AD input pin that outputs to processor is handled.
As prioritization scheme, described three-wire system thermal resistance sensor is the PT100 thermal resistance sensor.
As prioritization scheme, described signal protection module comprises perfectly straight resistance alternating current road and signal pressure limiting circuit, and perfectly straight resistance alternating current road is arranged between PT100 thermal resistance sensor and the signal pressure limiting circuit, is electrically connected between perfectly straight resistance alternating current road and the signal pressure limiting circuit.
The beneficial effect that the utility model flash point tester temperature measuring equipment is had is: owing to adopt three-wire system thermal resistance sensor PT100 as the sensor acquisition temperature signal, long transmission distance, system stability, detect accurately, antijamming capability is strong, the temperature that detection that can be real-time is measured.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Wherein: L1-L3, inductance J1, interface R1, electric positive C1-C3, electric capacity U1, constant current source module U2, signal amplification module B1, B2, schottky diode.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
As shown in Figure 1, between three-wire system thermal resistance sensor, constant current source module, signal protection module and the signal amplification module by being electrically connected.The output terminal of three-wire system thermal resistance sensor connects the input end of signal protection module, and the output terminal of signal protection module connects the input end of signal amplification module.
The three-wire system thermal resistance sensor is the PT100 thermal resistance sensor.
As shown in Figure 2, the signal protection module comprises perfectly straight resistance alternating current road and signal pressure limiting circuit, and perfectly straight resistance alternating current road is arranged between PT100 thermal resistance sensor and the signal pressure limiting circuit, is electrically connected between perfectly straight resistance alternating current road and the signal pressure limiting circuit.The output terminal of signal protection module connects the input end of signal amplification module U2.
Perfectly straight resistance alternating current route inductance L 1-L3 forms, and inductance L 1-L3 is separately positioned on three lines of interface J1, and wherein two are provided with a signal pressure limiting circuit respectively.The signal pressure limiting circuit is by schottky diode module B1, B2, and capacitor C 1-C3 forms.
1 pin and 2 pin of the output terminal connecting interface J1 of constant current source module U1.Constant current source module U1 comprises regulator block, integrated package, and regulator block and integrated package are electrically connected, and regulator block adopts the TL341A model; Integrated package adopts the OPA2340UA model.
Signal amplification module U2 comprises integrated package and resistor capacitor circuit, and by being electrically connected, integrated package adopts the OPA2340UA model between integrated package and the resistor capacitor circuit.
Constant current source module, the signal amplification module mentioned in the utility model can adopt common prior art.
Principle of work and use:
Constant current source module U1 produces constant current source and gives the power supply of three-wire system thermal resistance sensor.The three-wire system thermal resistance sensor is measured temperature and is produced voltage signal; through the perfectly straight resistance alternating current road and the signal pressure limiting circuit of signal protection module signal is protected processing then; after signal amplification module U2 amplifies the voltage of the temperature correspondence of measuring, the AD input pin that outputs to processor is handled.
Claims (3)
1. flash point tester temperature measuring equipment; comprise temperature sensor, constant current source module, signal protection module and signal amplification module; the output terminal of constant current source module connects temperature sensor; it is characterized in that: temperature sensor is set adopts the three-wire system thermal resistance sensor; the output terminal of three-wire system thermal resistance sensor connects the input end of signal protection module, and the output terminal of signal protection module connects the input end of signal amplification module.
2. flash point tester temperature measuring equipment according to claim 1 is characterized in that: described three-wire system thermal resistance sensor is the PT100 thermal resistance sensor.
3. flash point tester temperature measuring equipment according to claim 1; it is characterized in that: described signal protection module comprises perfectly straight resistance alternating current road and signal pressure limiting circuit; perfectly straight resistance alternating current road is arranged between PT100 thermal resistance sensor and the signal pressure limiting circuit, is electrically connected between perfectly straight resistance alternating current road and the signal pressure limiting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202820828U CN201583361U (en) | 2009-11-25 | 2009-11-25 | Flash point apparatus temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202820828U CN201583361U (en) | 2009-11-25 | 2009-11-25 | Flash point apparatus temperature measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201583361U true CN201583361U (en) | 2010-09-15 |
Family
ID=42725364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202820828U Expired - Fee Related CN201583361U (en) | 2009-11-25 | 2009-11-25 | Flash point apparatus temperature measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201583361U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865941A (en) * | 2012-10-10 | 2013-01-09 | 成都阜特科技股份有限公司 | Method for collecting and determining temperature |
-
2009
- 2009-11-25 CN CN2009202820828U patent/CN201583361U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865941A (en) * | 2012-10-10 | 2013-01-09 | 成都阜特科技股份有限公司 | Method for collecting and determining temperature |
| CN102865941B (en) * | 2012-10-10 | 2014-04-16 | 成都阜特科技股份有限公司 | Method for collecting and determining temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20111125 |