CN206683789U - A kind of multi-channel temperature measurement circuit - Google Patents
A kind of multi-channel temperature measurement circuit Download PDFInfo
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- CN206683789U CN206683789U CN201720390651.5U CN201720390651U CN206683789U CN 206683789 U CN206683789 U CN 206683789U CN 201720390651 U CN201720390651 U CN 201720390651U CN 206683789 U CN206683789 U CN 206683789U
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Abstract
The utility model belongs to field of circuit technology, there is provided a kind of multi-channel temperature measurement circuit.In the utility model, multi-channel temperature measurement circuit includes N number of temperature detecting module, gating module and amplification module；Each temperature detecting module is detected by the temperature-sensitive element with negative temperature coefficient to temperature, and temperature signal is converted into after voltage signal output to gating module, the low voltage signal that gating module selects to have minimum voltage value in N number of voltage signal is exported to amplification module, amplification module is amplified to low voltage signal and exported to ppu processing, it is achieved that detection and processing to maximum temperature value.The multi-channel temperature measurement circuit is detected using temperature-sensitive element to temperature, simple in construction, cost is low, solve the problems, such as present in the existing multi-channel temperature measurement circuit using temperature sensor it is complicated, cost is high and reliability is low.
Description
Technical field
The utility model belongs to field of circuit technology, more particularly to a kind of multi-channel temperature measurement circuit.
Background technology
Temperature detection is mostly carried out to part using temperature sensor in existing temperature sensing circuit, but uses temperature
The temperature sensing circuit of degree sensor has the shortcomings that circuit structure is complicated, cost is high, if desired enters trip temperature to multiple parts
Detection, then the circuit structure of multi-channel temperature measurement circuit is increasingly complex, cost is higher, and reliability is low.Therefore, existing use
The problem of complicated, cost is high and reliability is low be present in the multi-channel temperature measurement circuit of temperature sensor.
Utility model content
The purpose of this utility model is to provide a kind of multi-channel temperature measurement circuit, it is intended to solves existing using temperature biography
The problem of complicated, cost is high and reliability is low present in the multi-channel temperature measurement circuit of sensor.
The utility model is achieved in that a kind of multi-channel temperature measurement circuit, and the multi-channel temperature measurement circuit includes N
Individual temperature detecting module, gating module and amplification module, wherein, N is the positive integer more than 1.
N number of output end of N number of temperature detecting module is connected with N number of input of the gating module respectively, institute
The output end for stating gating module is connected with the input of the amplification module, the output end and external treatment of the amplification module
The input of device is connected.
Each temperature detecting module is detected by the temperature-sensitive element with negative temperature coefficient to temperature, and by temperature
To the gating module, the gating module selects to have in N number of voltage signal for output after degree signal is converted to voltage signal
The low voltage signal for having minimum voltage value exports to the amplification module, the amplification module and the low voltage signal is put
Big and output to ppu is handled.
In the utility model, multi-channel temperature measurement circuit includes N number of temperature detecting module, gating module and amplification mould
Block；Each temperature detecting module is detected by the temperature-sensitive element with negative temperature coefficient to temperature, and temperature signal is turned
To gating module, gating module selects the low-voltage in N number of voltage signal with minimum voltage value for output after being changed to voltage signal
To amplification module, amplification module is amplified and exported to ppu processing, therefore in fact signal output to low voltage signal
The detection and processing to maximum temperature value are showed.The multi-channel temperature measurement circuit is detected using temperature-sensitive element to temperature, knot
Structure is simple, cost is low, solve present in the existing multi-channel temperature measurement circuit using temperature sensor it is complicated, into
The problem of this height and low reliability.
Brief description of the drawings
Fig. 1 is the structural representation for the multi-channel temperature measurement circuit that the utility model embodiment provides；
Fig. 2 is the circuit diagram for the multi-channel temperature measurement circuit that another embodiment of the utility model provides.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Fig. 1 shows the structure for the multi-channel temperature measurement circuit that the utility model embodiment provides, for convenience of description, only
The part related to the utility model embodiment is shown, details are as follows：
Multi-channel temperature measurement circuit includes N number of temperature detecting module 100, gating module 200 and amplification module 300, wherein,
N is the positive integer more than 1.
N number of output end of N number of temperature detecting module 100 is connected with N number of input of gating module 200 respectively, gating
The output end of module 200 is connected with the input of amplification module 300, the output end of amplification module 300 and ppu
Input is connected.
Each temperature detecting module 100 is detected by the temperature-sensitive element with negative temperature coefficient to temperature, and by temperature
To gating module 200, gating module 200 is selected in N number of voltage signal with minimum for output after degree signal is converted to voltage signal
The low voltage signal of magnitude of voltage is exported to amplification module 300, and amplification module 300 is amplified to low voltage signal and exported to outer
Portion's processor processing.
Specifically, because temperature-sensitive element has negative temperature coefficient, therefore temperature is higher, the resistance of temperature-sensitive element is smaller.Temperature
The voltage signal that temperature detecting module 100 corresponding to degree highest temperature-sensitive element changes output has minimum voltage value, selects
Logical module 200 exports the voltage signal with minimum voltage value to amplification module 300, after the amplified enhanced processing of module 300
The processor exported to outside is handled, i.e., processor is handled maximum temperature value.
As the embodiment of the utility model one, as shown in Fig. 2 each temperature detecting module 100 includes thermistor RT, electricity
Hold C, first resistor R1 and second resistance R2.
Thermistor RTFirst end, electric capacity C first end, the first of first resistor R1 first end and second resistance R2
End meets the output end to form temperature detecting module 100, thermistor R altogetherTThe second end, electric capacity C the second end and second resistance
With being connected to power supply altogether, first resistor R1 the second end is connected with power supply VCC at R2 the second end.
As the embodiment of the utility model one, as shown in Fig. 2 gating module 200 includes N number of selecting unit 201 and the 3rd
Resistance R3.
N number of input of N number of selecting unit 201 be gating module 200 N number of input, N number of selecting unit 201 it is N number of
Output end and 3rd resistor R3 first end connect the output end to form gating module 200,3rd resistor R3 the second end and electricity altogether
Source VCC is connected.
As the embodiment of the utility model one, as shown in Fig. 2 each selecting unit 201 includes the 4th resistance R4, the 5th electricity
Hinder R5, the first amplifier A1 and diode D；
4th resistance R4 first end is the input of selecting unit 201, the first amplifier A1 in-phase input end, anti-phase
The second end with the 4th resistance R4, the 5th resistance R5 first end and diode D negative electrode are connected respectively for input and output end
Connect, the 5th resistance R5 the second end connects the output end to form selecting unit 201 altogether with diode D anode.
Specifically, two diode D in two neighboring selecting unit 201 can be realized using a device, can use
Model BAW56LT1G device is realized.
As the embodiment of the utility model one, as shown in Fig. 2 amplification module 300 includes the second amplifier A2, the 6th resistance
R6, the 7th resistance R7 and the 8th resistance R8.
Second amplifier A2 in-phase input end be amplification module 300 input, the second amplifier A2 anti-phase input
End and output end are connected with the 6th resistance R6 first end and the 7th resistance R7 first end respectively, and the second of the 6th resistance R6
The first end at end, the 7th resistance R7 the second end and the 8th resistance R8 connects the output end to form amplification module 300, the 8th resistance altogether
R8 the second end is connected with power supply.
Specifically, above-mentioned power supply VCC output voltage is 3V.
The operation principle of multi-channel temperature measurement circuit is illustrated below in conjunction with Fig. 2：
Thermistor RTWith negative temperature characteristic, temperature is higher, and resistance is smaller, and therefore, temperature is higher, temperature detecting module
The magnitude of voltage of 100 outputs is also minimum.The voltage signal that each temperature detecting module 100 exports is inputted to each selecting unit 201
Input, because the output end of each selecting unit 201 connects altogether, in power supply VCC, 3rd resistor R3 and diode D effect
Under, only the voltage signal with minimum voltage value can be exported in the output end of gating module 200, and the voltage signal is inputted to putting
Big module 300, output to ppu is handled after amplified module 300 is amplified.
In the utility model, multi-channel temperature measurement circuit includes N number of temperature detecting module, gating module and amplification mould
Block；Each temperature detecting module is detected by the temperature-sensitive element with negative temperature coefficient to temperature, and temperature signal is turned
To gating module, gating module selects the low-voltage in N number of voltage signal with minimum voltage value for output after being changed to voltage signal
To amplification module, amplification module is amplified and exported to ppu processing, therefore in fact signal output to low voltage signal
The detection and processing to maximum temperature value are showed.The multi-channel temperature measurement circuit is detected using temperature-sensitive element to temperature, knot
Structure is simple, cost is low, solve present in the existing multi-channel temperature measurement circuit using temperature sensor it is complicated, into
The problem of this height and low reliability.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of multi-channel temperature measurement circuit, it is characterised in that the multi-channel temperature measurement circuit includes N number of temperature detection mould
Block, gating module and amplification module, wherein, N is the positive integer more than 1；
N number of output end of N number of temperature detecting module is connected with N number of input of the gating module respectively, the choosing
The output end of logical module is connected with the input of the amplification module, the output end of the amplification module and ppu
Input is connected；
Each temperature detecting module is detected by the temperature-sensitive element with negative temperature coefficient to temperature, and temperature is believed
To the gating module, the gating module selects to have most in N number of voltage signal for output after number being converted to voltage signal
The low voltage signal of low voltage value exports to the amplification module, the amplification module and the low voltage signal is amplified simultaneously
Output to ppu is handled.
2. multi-channel temperature measurement circuit as claimed in claim 1, it is characterised in that each temperature detecting module includes heat
Quick resistance, electric capacity, first resistor and second resistance；
The first end of the thermistor, the first end of the electric capacity, the first end of the first resistor and the second resistance
First end connect the output end to form the temperature detecting module, the second end of the thermistor, the second of the electric capacity altogether
With being connected to power supply altogether, the second end of the first resistor is connected with power supply for end and the second end of the second resistance.
3. multi-channel temperature measurement circuit as claimed in claim 2, it is characterised in that it is single that the gating module includes N number of selection
Member and 3rd resistor；
N number of input of N number of selecting unit be the gating module N number of input, N number of selecting unit it is N number of
The first end of output end and the 3rd resistor connects the output end to form the gating module, the second end of the 3rd resistor altogether
It is connected with the power supply.
4. multi-channel temperature measurement circuit as claimed in claim 3, it is characterised in that each selecting unit includes the 4th electricity
Resistance, the 5th resistance, the first amplifier and diode；
The first end of 4th resistance is the input of the selecting unit, the in-phase input end of first amplifier, anti-
Phase input and output end the second end with the 4th resistance, the first end of the 5th resistance and the diode respectively
Negative electrode is connected, and the second end of the 5th resistance connects the output to form the selecting unit altogether with the anode of the diode
End.
5. multi-channel temperature measurement circuit as claimed in claim 2, it is characterised in that the amplification module includes the second amplification
Device, the 6th resistance, the 7th resistance and the 8th resistance；
The in-phase input end of second amplifier be the amplification module input, the anti-phase input of second amplifier
End and output end are connected with the first end of the 6th resistance and the first end of the 7th resistance respectively, the 6th resistance
The second end, the second end of the 7th resistance and the first end of the 8th resistance connect the output to form the amplification module altogether
End, the second end of the 8th resistance is connected with the power supply.
6. multi-channel temperature measurement circuit as claimed in claim 2, it is characterised in that the output voltage of the power supply is 3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720390651.5U CN206683789U (en) | 2017-04-13 | 2017-04-13 | A kind of multi-channel temperature measurement circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720390651.5U CN206683789U (en) | 2017-04-13 | 2017-04-13 | A kind of multi-channel temperature measurement circuit |
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| CN206683789U true CN206683789U (en) | 2017-11-28 |
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| CN201720390651.5U Active CN206683789U (en) | 2017-04-13 | 2017-04-13 | A kind of multi-channel temperature measurement circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357782A (en) * | 2018-12-21 | 2019-02-19 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| CN109357783A (en) * | 2018-12-21 | 2019-02-19 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| CN109374151A (en) * | 2018-12-21 | 2019-02-22 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| WO2024076025A1 (en) * | 2022-10-07 | 2024-04-11 | 주식회사 필드큐어 | Maximum temperature measurement device |
-
2017
- 2017-04-13 CN CN201720390651.5U patent/CN206683789U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357782A (en) * | 2018-12-21 | 2019-02-19 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| CN109357783A (en) * | 2018-12-21 | 2019-02-19 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| CN109374151A (en) * | 2018-12-21 | 2019-02-22 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| WO2024076025A1 (en) * | 2022-10-07 | 2024-04-11 | 주식회사 필드큐어 | Maximum temperature measurement device |
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