CN203519187U - Remote temperature measurement circuit used for sewage processing - Google Patents
Remote temperature measurement circuit used for sewage processing Download PDFInfo
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- CN203519187U CN203519187U CN201320611893.4U CN201320611893U CN203519187U CN 203519187 U CN203519187 U CN 203519187U CN 201320611893 U CN201320611893 U CN 201320611893U CN 203519187 U CN203519187 U CN 203519187U
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Abstract
The utility model discloses a remote temperature measurement circuit used for sewage processing. The remote temperature measurement circuit comprises a digital temperature sensor, a temperature signal rectification circuit, and a temperature signal emitting circuit, wherein a first power supply input terminal of the remote temperature measurement circuit is connected with a first terminal of a first resistor, an emitting electrode of a transistor, and a power supply terminal of the digital temperature sensor; a grounding terminal of the digital temperature sensor is grounded; a signal output terminal of the digital temperature sensor is connected with a first terminal of a second resistor, a second terminal of the second resistor, a second terminal of the first resistor, and a base electrode of the transistor; a collecting electrode of the transistor is connected with a first terminal of the third resistor; a second terminal of the third resistor is connected with a temperature signal input terminal of the temperature signal emitting circuit. The remote temperature measurement circuit emits detected temperature signals through the temperature signal emitting circuit, so that works are allowed to monitor sewage processing remotely. The remote temperature measurement circuit has advantages of being simple in structure, being high in detection accuracy, and being stable in work state.
Description
Technical field
The utility model relates to a kind of temperature measurement circuit, relates in particular to a kind of long distance temperature measurement circuit for wastewater treatment.
Background technology
When carrying out wastewater treatment, often need sewage to heat or the processing of lowering the temperature, and the real-time detection of water temperature is seemed to particularly important.At present the detection of water temperature is generally adopted to close-ups mode, seldom have the use of long distance temperature measurement.
Utility model content
The purpose of this utility model provides a kind of long distance temperature measurement circuit for wastewater treatment with regard to being in order to address the above problem.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of long distance temperature measurement circuit for wastewater treatment, comprise digital temperature sensor, temperature signal rectification circuit and temperature signal radiating circuit, described temperature signal rectification circuit comprises the first resistance, the second resistance, the 3rd resistance and triode, the first power input of described long distance temperature measurement circuit respectively with the first end of described the first resistance, the emitter of described triode is connected with the power end of described digital temperature sensor, the earth terminal ground connection of described digital temperature sensor, the signal output part of described digital temperature sensor is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the second end of described the first resistance and the base stage of described triode respectively, the collector of described triode is connected with the first end of described the 3rd resistance, the second end of described the 3rd resistance is connected with the temperature signal input end of described temperature signal radiating circuit.
Particularly, described temperature signal radiating circuit comprises photoelectrical coupler and the 4th resistance, the light emitting diode positive pole of described photoelectrical coupler is connected with the second end of described the 3rd resistance, the light emitting diode minus earth of described photoelectrical coupler, the transistor collector of described photoelectrical coupler is connected with first signal output terminal with the first end of described the 4th resistance respectively, the second end of described the 4th resistance is connected with second source input end, and the transistor emitter of described photoelectrical coupler is connected with secondary signal output terminal.
The beneficial effects of the utility model are:
A kind of long distance temperature measurement circuit for wastewater treatment of the utility model, by temperature signal radiating circuit, the temperature signal detecting is launched, wastewater treatment staff can realize remote monitoring, and the utility model also has simple in structure, detects the advantage of degree of accuracy height and stable working state.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of long distance temperature measurement circuit for wastewater treatment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, a kind of long distance temperature measurement circuit for wastewater treatment of the utility model, comprise digital temperature sensor IC, temperature signal rectification circuit and temperature signal radiating circuit, temperature signal rectification circuit comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and triode VT, the first power input of long distance temperature measurement circuit respectively with the first end of the first resistance R 1, the emitter of triode VT is connected with the power end of digital temperature sensor IC, the earth terminal ground connection of digital temperature sensor IC, the signal output part of digital temperature sensor IC is connected with the first end of the second resistance R 2, the second end of the second resistance R 2 is connected with the base stage of triode VT with the second end of the first resistance R 1 respectively, the collector of triode VT is connected with the first end of the 3rd resistance R 3, the second end of the 3rd resistance R 3 is connected with the temperature signal input end of temperature signal radiating circuit.
Temperature signal radiating circuit comprises photoelectrical coupler OC and the 4th resistance R 4, the light emitting diode positive pole of photoelectrical coupler OC is connected with the second end of the 3rd resistance R 3, the light emitting diode minus earth of photoelectrical coupler OC, the transistor collector of photoelectrical coupler OC is connected with first signal output terminal with the first end of the 4th resistance R 4 respectively, the second end of the 4th resistance R 4 is connected with second source input end, and the transistor emitter of photoelectrical coupler OC is connected with secondary signal output terminal.
When carrying out remote temperature measurement, on transmission line, exist higher common mode voltage, the employing of photoelectrical coupler can be isolated signal output part.The first resistance R 1 in circuit plays metering function, prevents that the overcurrent of light emitting diode in photoelectrical coupler OC from damaging.Triode VT provides larger working current to photoelectrical coupler OC.Digital temperature sensor IC adopts the digital temperature sensor that model is TMP03, and when carrying out long distance temperature measurement, digital temperature sensor IC is much better than simulation output type temperature sensor.
Claims (2)
1. the long distance temperature measurement circuit for wastewater treatment, it is characterized in that: comprise digital temperature sensor, temperature signal rectification circuit and temperature signal radiating circuit, described temperature signal rectification circuit comprises the first resistance, the second resistance, the 3rd resistance and triode, the first power input of described long distance temperature measurement circuit respectively with the first end of described the first resistance, the emitter of described triode is connected with the power end of described digital temperature sensor, the earth terminal ground connection of described digital temperature sensor, the signal output part of described digital temperature sensor is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the second end of described the first resistance and the base stage of described triode respectively, the collector of described triode is connected with the first end of described the 3rd resistance, the second end of described the 3rd resistance is connected with the temperature signal input end of described temperature signal radiating circuit.
2. a kind of long distance temperature measurement circuit for wastewater treatment according to claim 1, it is characterized in that: described temperature signal radiating circuit comprises photoelectrical coupler and the 4th resistance, the light emitting diode positive pole of described photoelectrical coupler is connected with the second end of described the 3rd resistance, the light emitting diode minus earth of described photoelectrical coupler, the transistor collector of described photoelectrical coupler is connected with first signal output terminal with the first end of described the 4th resistance respectively, the second end of described the 4th resistance is connected with second source input end, the transistor emitter of described photoelectrical coupler is connected with secondary signal output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320611893.4U CN203519187U (en) | 2013-10-05 | 2013-10-05 | Remote temperature measurement circuit used for sewage processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320611893.4U CN203519187U (en) | 2013-10-05 | 2013-10-05 | Remote temperature measurement circuit used for sewage processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203519187U true CN203519187U (en) | 2014-04-02 |
Family
ID=50378105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320611893.4U Expired - Fee Related CN203519187U (en) | 2013-10-05 | 2013-10-05 | Remote temperature measurement circuit used for sewage processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203519187U (en) |
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2013
- 2013-10-05 CN CN201320611893.4U patent/CN203519187U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20141005 |
|
| EXPY | Termination of patent right or utility model |