CN207231657U - A kind of temperature collection circuit with multi-protocols output - Google Patents
A kind of temperature collection circuit with multi-protocols output Download PDFInfo
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- CN207231657U CN207231657U CN201721204189.1U CN201721204189U CN207231657U CN 207231657 U CN207231657 U CN 207231657U CN 201721204189 U CN201721204189 U CN 201721204189U CN 207231657 U CN207231657 U CN 207231657U
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Abstract
The utility model discloses a kind of temperature collection circuit with multi-protocols output, and in particular to temperature collection circuit technical field.The temperature collection circuit with multi-protocols output, including sequentially connected signal acquisition circuit, first signal conditioning circuit and secondary signal modulate circuit, the output terminal output voltage signal of secondary signal modulate circuit, voltage-frequency conversion circuit and analog to digital conversion circuit are connected with secondary signal modulate circuit, the square-wave signal that voltage-frequency conversion circuit output varies with temperature, analog to digital conversion circuit connects microcontroller, TTL serial signals are exported on microcontroller, D/A conversion chips and single supply electrical level transferring chip are connected with microcontroller, controllable current signal is exported on D/A conversion chips, 232 signals are exported in single supply electrical level transferring chip.It is different to which overcome the sensor output protocol that all kinds of temperature monitoring systems need, uses the deficiency of inconvenience.
Description
Technical field
It the utility model is related to temperature collection circuit technical field, and in particular to a kind of temperature with multi-protocols output is adopted
Collector.
Background technology
This kind of product category environmental sensitivity product such as special medical articles for use, seafood products, dairy products, reaches consumer
Before in hand, production, storage, transportation environment temperature must be in a rational scope, and the monitoring to this kind of environment has ten
Divide important meaning.In recent years, often report such product due to transport, storage environment not in the various network medias, TV
The suitable report for causing quality problems to cause heavy economic losses.The core devices of monitoring temperature are sensors, all kinds of temperature prisons
The sensor output protocol that control system needs is different, uses inconvenience.
Utility model content
The purpose of this utility model is to be directed to above-mentioned deficiency, it is proposed that one kind has a variety of outputs, easy to be integrated into temperature
The temperature collection circuit with multi-protocols output in monitoring system.
The utility model specifically adopts the following technical scheme that：
A kind of temperature collection circuit with multi-protocols output, including sequentially connected signal acquisition circuit, the first signal
Modulate circuit and secondary signal modulate circuit, the output terminal output voltage signal of secondary signal modulate circuit, secondary signal conditioning
Voltage-frequency conversion circuit and analog to digital conversion circuit, the square-wave signal that voltage-frequency conversion circuit output varies with temperature, mould are connected with circuit
Number conversion circuits connection microcontrollers, TTL serial signals are exported on microcontroller, be connected with microcontroller D/A conversion chips and
Single supply electrical level transferring chip, controllable current signal is exported on D/A conversion chips, 232 are exported in single supply electrical level transferring chip
Signal.
Preferably, the signal acquisition circuit includes thermistor and the resistance of series connection with it partial pressure, the electricity for partial pressure of connecting
The resistance value of resistance is 300 Ω.
Preferably, first signal conditioning circuit and secondary signal modulate circuit are inverse proportion amplifying circuit, and first
Signal conditioning circuit, which includes the first adjustment resistance and resistance R3, secondary signal modulate circuit, includes second adjustment resistance and resistance
R4, the first signal conditioning circuit determines amplification factor by the adjustment resistance of resistance R3 and first, and signal is reverse, secondary signal tune
Manage electricity routing resistance R4 and second adjustment resistance is reverse by signal again.
Preferably, the voltage-frequency conversion circuit uses 555 voltage-frequency conversion circuits.
Preferably, the microcontroller uses AT89C51.
The utility model has the advantages that：The temperature collection circuit with multi-protocols output being capable of output voltage
5 signal outputs such as signal, controllable current signal, the square-wave signal varied with temperature, TTL serial signals, 232 signals, wherein,
The exportable standard modbus communication signals of TTL serial signals, voltage signal, controllable current signal, the square wave letter varied with temperature
Number can relation proportional to temperature signal, can very easily be converted by AD, measurement frequency etc. is called by other circuits；Due to
The circuit has a variety of outputs, can very easily be integrated into monitoring temperature engineering.Overcome all kinds of temperature monitoring systems
The different deficiency of the sensor output protocol that needs, it is convenient to be easy to use.
Brief description of the drawings
Fig. 1 is the structure diagram of the temperature collection circuit with multi-protocols output；
Fig. 2 is the circuit diagram of the temperature collection circuit with multi-protocols output.
Embodiment
Specific embodiment of the present utility model is described further with specific embodiment below in conjunction with the accompanying drawings：
As Figure 1-Figure 2, a kind of temperature collection circuit with multi-protocols output, including sequentially connected signal acquisition
Circuit, the first signal conditioning circuit and secondary signal modulate circuit, the output terminal output voltage signal of secondary signal modulate circuit,
Voltage-frequency conversion circuit and analog to digital conversion circuit are connected with secondary signal modulate circuit, voltage-frequency conversion circuit output varies with temperature
Square-wave signal, analog to digital conversion circuit connect microcontroller, TTL serial signals are exported on microcontroller, D/A is connected with microcontroller
Conversion chip and single supply electrical level transferring chip, controllable current signal, single supply electrical level transferring chip are exported on D/A conversion chips
232 signals of upper output.
Signal acquisition circuit includes thermistor and the resistance of series connection with it partial pressure, and the resistance value of the resistance for partial pressure of connecting is
300Ω。
First signal conditioning circuit and secondary signal modulate circuit are inverse proportion amplifying circuit, the first signal conditioning circuit
Including the first adjustment resistance RV2 and resistance R3, secondary signal modulate circuit includes second adjustment resistance RV3 and resistance R4, and first
Signal conditioning circuit determines amplification factor by the adjustment of resistance R3 and first resistance RV2, and signal is reverse, secondary signal conditioning electricity
Routing resistance R4 and second adjustment resistance RV3 are reverse by signal again.
Voltage-frequency conversion circuit uses 555 voltage-frequency conversion circuits, and microcontroller uses AT89C51.
The temperature collection circuit with multi-protocols output can output voltage signal, controllable current signal, become with temperature
5 signal outputs such as the square-wave signal of change, TTL serial signals, 232 signals, can very easily be called by other circuits.Circuit
Connected with certain value resistance partial pressure by thermistor, changed into by the first signal conditioning circuit, secondary signal modulate circuit
Suitable voltage, which can be used as input signal, while the voltage can be converted to temperature value by voltage-frequency conversion circuit
The square-wave signal output of change, meanwhile, which enters microcontroller by analog to digital conversion circuit (AD), and microcontroller controls the letter
Number controllable current signal, TTL serial signals and 232 signal outputs are converted into, can be very square since the circuit has a variety of outputs
Being integrated into monitoring temperature engineering just.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model, also should
Belong to the scope of protection of the utility model.
Claims (5)
1. it is a kind of with multi-protocols output temperature collection circuit, it is characterised in that including sequentially connected signal acquisition circuit,
First signal conditioning circuit and secondary signal modulate circuit, the output terminal output voltage signal of secondary signal modulate circuit, second
Voltage-frequency conversion circuit and analog to digital conversion circuit, the square wave that voltage-frequency conversion circuit output varies with temperature are connected with signal conditioning circuit
Signal, analog to digital conversion circuit connect microcontroller, TTL serial signals are exported on microcontroller, and D/A conversions are connected with microcontroller
Chip and single supply electrical level transferring chip, export controllable current signal on D/A conversion chips, defeated in single supply electrical level transferring chip
Go out 232 signals.
2. a kind of temperature collection circuit with multi-protocols output as claimed in claim 1, it is characterised in that the signal is adopted
Collector includes thermistor and the resistance of series connection with it partial pressure, and the resistance value of the resistance for partial pressure of connecting is 300 Ω.
A kind of 3. temperature collection circuit with multi-protocols output as claimed in claim 1, it is characterised in that first letter
Number modulate circuit is inverse proportion amplifying circuit with secondary signal modulate circuit, and the first signal conditioning circuit includes the first adjustment electricity
Resistance and resistance R3, secondary signal modulate circuit include second adjustment resistance and resistance R4, and the first signal conditioning circuit is by resistance R3
Amplification factor is determined with the first adjustment resistance, and signal is reverse, and secondary signal modulate circuit is by resistance R4 and second adjustment electricity
Resistance is reverse by signal again.
4. a kind of temperature collection circuit with multi-protocols output as claimed in claim 1, it is characterised in that the voltage-frequency turns
Change circuit and use 555 voltage-frequency conversion circuits.
A kind of 5. temperature collection circuit with multi-protocols output as claimed in claim 1, it is characterised in that the microcontroller
Device uses AT89C51.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721204189.1U CN207231657U (en) | 2017-09-20 | 2017-09-20 | A kind of temperature collection circuit with multi-protocols output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721204189.1U CN207231657U (en) | 2017-09-20 | 2017-09-20 | A kind of temperature collection circuit with multi-protocols output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207231657U true CN207231657U (en) | 2018-04-13 |
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ID=61863026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721204189.1U Expired - Fee Related CN207231657U (en) | 2017-09-20 | 2017-09-20 | A kind of temperature collection circuit with multi-protocols output |
Country Status (1)
| Country | Link |
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| CN (1) | CN207231657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828170A (en) * | 2018-04-26 | 2018-11-16 | 中国石油大学(华东) | A kind of sea-farming dissolved oxygen concentration acquisition device and method with multi-protocols output |
-
2017
- 2017-09-20 CN CN201721204189.1U patent/CN207231657U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828170A (en) * | 2018-04-26 | 2018-11-16 | 中国石油大学(华东) | A kind of sea-farming dissolved oxygen concentration acquisition device and method with multi-protocols output |
| CN108828170B (en) * | 2018-04-26 | 2021-05-28 | 青岛黄海学院 | Mariculture dissolved oxygen concentration acquisition device and method with multi-protocol output |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180413 Termination date: 20180920 |