CN204085726U - A kind of temperature sensing circuit structure - Google Patents
A kind of temperature sensing circuit structure Download PDFInfo
- Publication number
- CN204085726U CN204085726U CN201420409841.3U CN201420409841U CN204085726U CN 204085726 U CN204085726 U CN 204085726U CN 201420409841 U CN201420409841 U CN 201420409841U CN 204085726 U CN204085726 U CN 204085726U
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- Prior art keywords
- voltage comparator
- resistance
- diode
- pressure element
- power transformation
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Abstract
The utility model discloses a kind of without the need to using monolithic processor controlled temperature sensing circuit structure.A kind of temperature sensing circuit structure, comprises and is series at the first sectional pressure element between inlet highway positive pole and negative pole and the second sectional pressure element; At least one warm power transformation hinders and hinders bleeder circuit supporting one by one with warm power transformation, this bleeder circuit comprises and hinders the equal divider resistance of number, the diode equal with divider resistance number and a shared resistance with warm power transformation, this shared resistance by corresponding diode and each divider resistance equal in parallel after become resistant series with temperature again; A voltage comparator and a positive-feedback circuit, the electrode input end of this voltage comparator is connected between the first sectional pressure element and the second sectional pressure element; The negative input of voltage comparator is connected between shared resistance and diode; The output terminal of voltage comparator is as signal output part; Described positive-feedback circuit is connected between the output terminal of voltage comparator and electrode input end.
Description
Technical field
The utility model relates to a kind of temperature sensing circuit structure.
Background technology
Current existing temperature-detecting device adopts a kind of resistance and temperature to become resistant series dividing potential drop, single-chip microcomputer is sent to by the voltage gathering warm power transformation resistance two ends, carry out output low level or high level after signal transacting by single-chip microcomputer again, thus detect the temperature of object under test.This circuit structure is simple, and driving force is weak, and due to single-chip microcomputer event cost will be used higher.
Utility model content
Technical problem to be solved in the utility model is: provide that a kind of cost is lower, testing circuit structure without the need to using Single-chip Controlling just can detect object under test temperature.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of temperature sensing circuit structure, comprises and is series at the first sectional pressure element between inlet highway positive pole and negative pole and the second sectional pressure element; At least one warm power transformation hinders and hinders bleeder circuit supporting one by one with warm power transformation, this warm power transformation resistance is installed on outside each battery core of lithium battery, this bleeder circuit comprises and hinders the equal divider resistance of number, the diode equal with divider resistance number and a shared resistance with warm power transformation, this shared resistance by corresponding diode and each divider resistance equal in parallel after become resistant series with temperature again; A voltage comparator and a positive-feedback circuit, the electrode input end of this voltage comparator is connected between the first sectional pressure element and the second sectional pressure element; The negative input of voltage comparator is connected between shared resistance and diode; The output terminal of voltage comparator is as signal output part; Described positive-feedback circuit is connected between the output terminal of voltage comparator and electrode input end.
As the preferred scheme of one, described positive-feedback circuit comprises a diode and resistance, and this diode and resistance are connected mutually, and the positive pole of diode is connected with the output terminal of voltage comparator, and this resistance is connected with the electrode input end of voltage comparator.
As the preferred scheme of one, electrode input end and the inlet highway negative pole of the negative input of described voltage comparator and inlet highway negative pole, voltage comparator are equipped with filtering circuit.
After have employed technique scheme, effect of the present utility model is: this temperature sensing circuit structure is when warm power transformation resistance is normal, and the negative input of voltage comparator is higher than the voltage of electrode input end, and thus output terminal is output low level; And when ambient temperature raises; the voltage of temperature power transformation resistance reduces; the negative input of voltage comparator is lower than the voltage of electrode input end; thus output terminal exports high level, and like this, this temperature sensing circuit structure controls without the need to singlechip feedbsck; driving force is stronger; cost is lower, this temperature sensing circuit structure can with external drive circuit with the use of, reach the object of temperature protection.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the temperature protection lag loop figure of the utility model embodiment;
Fig. 2 is the circuit diagram of the utility model embodiment;
Embodiment
Below by specific embodiment, the utility model is described in further detail.
As shown in Figure 2, a kind of temperature sensing circuit structure, comprises and is series at the first sectional pressure element between inlet highway positive pole and negative pole and the second sectional pressure element, the resistance R7 that this first sectional pressure element and the second sectional pressure element are selected and resistance R9, at least one warm power transformation hinders and hinders bleeder circuit supporting one by one with warm power transformation, three warm power transformation resistance RT1 are adopted in the present embodiment, RT2 and RT3, this temperature sensing circuit may be used on lithium battery, thus each temperature power transformation resistance can be installed on outside each battery core of lithium battery, the temperature during work of monitoring lithium battery, this bleeder circuit comprises and hinders the equal divider resistance R4 of number with warm power transformation, R5, R6, wherein, it is corresponding that R4 and warm power transformation hinder RT1, R5 and RT2 is corresponding, R6 and RT3 is corresponding, the diode equal with divider resistance number and a shared resistance R1, this shared resistance by corresponding diode and each divider resistance equal in parallel after become resistant series with temperature again, specifically can be divided into: share resistance R1 and connected with RT1 again with after R4 parallel connection by diode D2, share resistance R1 and connected with RT2 again with after R5 parallel connection by diode D3, share resistance R1 and connected with RT3 again with after R6 parallel connection by diode D4, a voltage comparator and a positive-feedback circuit, the electrode input end of this voltage comparator is connected between the first sectional pressure element and the second sectional pressure element, the negative input of voltage comparator is connected between shared resistance and diode, the output terminal of voltage comparator is as signal output part, described positive-feedback circuit is connected between the output terminal of voltage comparator and electrode input end, and as shown in Figure 2, the feeder ear of voltage comparator connects inlet highway positive pole, and earth terminal connects inlet highway negative pole.Described positive-feedback circuit comprises a diode and resistance, and this diode and resistance are connected mutually, and the positive pole of diode is connected with the output terminal of voltage comparator, and this resistance is connected with the electrode input end of voltage comparator.Electrode input end and the inlet highway negative pole of the negative input of described voltage comparator and inlet highway negative pole, voltage comparator are equipped with filtering circuit.
Principle of work of the present utility model is: as shown in Figure 2,
The resistance value of NTC when the value (rt1, rt2, rt3) calculated according to equation 2 is temperature protection.And then the resistance table to provide according to supplier or Beta value choose corresponding temperature power transformation resistance.Under normal operating conditions, U1
(-)be greater than U1
(+), voltage comparator U1 output low level.The temperature becoming resistance detection when any one temperature raises, and the temperature that such as RT1 detects raises, and the voltage Vrt1 at so warm power transformation resistance RT1 two ends reduces, and causes U1
(-)the voltage (Vrt1+Vd2) of end reduces, and when reaching temperature protection point Vot, U1
(-)be less than U1
(+), U1 exports high level.Owing to being provided with positive-feedback circuit in circuit, voltage comparator, when U1 exports high level, makes U1 by positive feedback
(+)voltage raise, so when temperature will drop to the certain value of below temperature protection point (temperature return point Vlt), U1
(-)again U1 could be greater than
(+), U1 output low level, circuit recovers normal work.
Temperature return point Vlt can by arranging positive feedback resistor R2 to set, and computing formula is shown in that 3, Fig. 1 illustrates temperature protection lag loop figure.
Claims (3)
1. a temperature sensing circuit structure, is characterized in that: comprise and be series at the first sectional pressure element between inlet highway positive pole and negative pole and the second sectional pressure element; At least one warm power transformation hinders and hinders bleeder circuit supporting one by one with warm power transformation, this warm power transformation resistance is installed on the surface of object under test, this bleeder circuit comprises and hinders the equal divider resistance of number, the diode equal with divider resistance number and a shared resistance with warm power transformation, this shared resistance by corresponding diode and each divider resistance equal in parallel after become resistant series with temperature again; A voltage comparator and a positive-feedback circuit, the electrode input end of this voltage comparator is connected between the first sectional pressure element and the second sectional pressure element; The negative input of voltage comparator is connected between shared resistance and diode; The output terminal of voltage comparator is as signal output part; Described positive-feedback circuit is connected between the output terminal of voltage comparator and electrode input end.
2. a kind of temperature sensing circuit structure as claimed in claim 1, it is characterized in that: described positive-feedback circuit comprises a diode and resistance, this diode and resistance are connected mutually, the positive pole of diode is connected with the output terminal of voltage comparator, and this resistance is connected with the electrode input end of voltage comparator.
3. a kind of temperature sensing circuit structure as claimed in claim 2, is characterized in that: electrode input end and the inlet highway negative pole of the negative input of described voltage comparator and inlet highway negative pole, voltage comparator are equipped with filtering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420409841.3U CN204085726U (en) | 2014-01-06 | 2014-07-24 | A kind of temperature sensing circuit structure |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420005328.8 | 2014-01-06 | ||
| CN201420005328 | 2014-01-06 | ||
| CN201420409841.3U CN204085726U (en) | 2014-01-06 | 2014-07-24 | A kind of temperature sensing circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204085726U true CN204085726U (en) | 2015-01-07 |
Family
ID=52178428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420409841.3U Expired - Fee Related CN204085726U (en) | 2014-01-06 | 2014-07-24 | A kind of temperature sensing circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204085726U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728670A (en) * | 2017-10-24 | 2018-02-23 | 上海辛格林纳新时达电机有限公司 | Condensation prevention system and the cold frequency converter of water/liquid |
| CN107769675A (en) * | 2017-10-18 | 2018-03-06 | 天津市三源电力设备制造有限公司 | A kind of discharging circuit of direct current generator |
| CN107806938A (en) * | 2017-09-29 | 2018-03-16 | 中国科学院广州能源研究所 | A kind of micro internal combustion engine is from accumulation of heat ignition temperature measuring method and device |
-
2014
- 2014-07-24 CN CN201420409841.3U patent/CN204085726U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806938A (en) * | 2017-09-29 | 2018-03-16 | 中国科学院广州能源研究所 | A kind of micro internal combustion engine is from accumulation of heat ignition temperature measuring method and device |
| CN107769675A (en) * | 2017-10-18 | 2018-03-06 | 天津市三源电力设备制造有限公司 | A kind of discharging circuit of direct current generator |
| CN107728670A (en) * | 2017-10-24 | 2018-02-23 | 上海辛格林纳新时达电机有限公司 | Condensation prevention system and the cold frequency converter of water/liquid |
| CN107728670B (en) * | 2017-10-24 | 2023-01-06 | 上海辛格林纳新时达电机有限公司 | Condensation prevention system and water/liquid cooling frequency converter |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20200724 |