CN200965642Y - DC temperature control circuit - Google Patents
DC temperature control circuit Download PDFInfo
- Publication number
- CN200965642Y CN200965642Y CN 200620010483 CN200620010483U CN200965642Y CN 200965642 Y CN200965642 Y CN 200965642Y CN 200620010483 CN200620010483 CN 200620010483 CN 200620010483 U CN200620010483 U CN 200620010483U CN 200965642 Y CN200965642 Y CN 200965642Y
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- resistance
- circuit
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- triode
- comparer
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Abstract
The utility model discloses a DC temperature control circuit comprising a temperature measuring bridge circuit, a comparator, an integral circuit and a magnifying and driving circuit. The output end of the temperature bridge circuit is connected with the input end of the comparator, the output end of which is electrically connected with the input end of the magnifying and driving circuit and the input end of the integral circuit is electrically connected with the comparator and the output end of the integral circuit is electrically connected with the temperature measuring bridge circuit. The temperature measuring bridge circuit measures changeable temperature to turn the change of temperature into electric signals which is then output to the comparator to be processed. The comparator outputs the processed signals to the magnifying and driving circuit to be magnified to drive the work of a heating element and the integral circuit progresses integral control to the temperature deviation. By using fewer components and being easily got in the market, the utility model has the advantages of simple structure, noninterference outward, and high precision temperature control, so the DC temperature control circuit has high practical value.
Description
Technical field
The utility model relates to a kind of direct current temperature control circuit, belongs to electronic technology field.
Background technology
In known temperature-adjusting circuit, adopt exchanges temperature control more, even if use the direct current temperature control, also is to adopt pulsating direct current, and direct current is carried out frequency modulation or amplitude modulation, and sort circuit is not only complicated, and quite big to controlled device and external interference.
The utility model content
The purpose of this utility model provides a kind of direct current temperature control circuit simple in structure, that externally noiseless, temperature-controlled precision is high.
For achieving the above object, the technical scheme that the utility model adopted is: the direct current temperature control circuit, it is characterized in that: described temperature control circuit comprises the thermometric bridge circuit, comparer, integrating circuit, amplification driving circuit, the output terminal of described thermometric bridge circuit is electrically connected with the input end of comparer, the output terminal of described comparer is electrically connected with the input end of amplification driving circuit, the input end of described integrating circuit is electrically connected with comparer, the output terminal of described integrating circuit is electrically connected with the thermometric bridge circuit, described thermometric bridge measurement variation of temperature, change variation of temperature into electric signal, exporting comparer to handles, signal after comparer will be handled exports amplification driving circuit to and amplifies, drive the work of heating element, described integrating circuit carries out integration control to the deviation of temperature.
Below be the improvement of technical solutions of the utility model:
Described thermometric bridge circuit is by resistance R 1, R2, R4, R5 and thermistor R3 form, ground connection after resistance R 1 is connected with thermistor R3, resistance R 2 and resistance R 4, R5 series connection back ground connection, resistance R 1, another termination voltage reference of R2, described comparer is by operational amplifier U1, resistance R 6, R7, capacitor C 2, C3, C5 forms, described integrating circuit is by resistance R 11, capacitor C 1, C4 forms, described amplification driving circuit is by triode Q1, Q2, resistance R 9～R12 forms, 7 pin of described operational amplifier U1 connect power supply, and through capacitor C 2 ground connection, 4 pin connect negative supply, and through capacitor C 5 ground connection, 2 pin are input end, 6 pin connect the base stage of triode Q1 through resistance R 8,2 pin connect the contact of resistance R 1 and thermistor R3,3 pin connect the contact of resistance R 2 and resistance R 4,1 pin, be connected with the resistance R 6 of capacitor C 3 and series connection between 8 pin, R7, resistance R 6, the contact of R7 is connected with 4 pin, the collector of triode Q1 connects power supply through resistance R 9, emitter connects the base stage of triode Q2 and through resistance R 10 ground connection, the emitter of triode Q2 is through resistance R 12 ground connection, the capacitor C 1 of described integrating circuit, C4, resistance R 11 is connected successively, 2 pin of another termination operational amplifier U1 of capacitor C 1, resistance R 11 connects the collector of triode Q2, is connected with heating element between the collector of described triode Q2 and the power supply.
Beneficial effect: the utility model adopts said structure, and have the following advantages: the components and parts of use are fewer, obtains than being easier on the market, have simple in structure, function admirable, cheap characteristics, externally noiseless, temperature-controlled precision is high, so the utlity model has higher use value.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing 1 is the block diagram of the utility model embodiment;
Accompanying drawing 2 is the circuit theory diagrams of the utility model embodiment.
Embodiment
Embodiment, as shown in Figure 1, the direct current temperature control circuit, described temperature control circuit comprises the thermometric bridge circuit, comparer, integrating circuit, amplification driving circuit, the output terminal of described thermometric bridge circuit is electrically connected with the input end of comparer, the output terminal of described comparer is electrically connected with the input end of amplification driving circuit, the input end of described integrating circuit is electrically connected with comparer, the output terminal of described integrating circuit is electrically connected with the thermometric bridge circuit, described thermometric bridge measurement variation of temperature, change variation of temperature into electric signal, exporting comparer to handles, signal after comparer will be handled exports amplification driving circuit to and amplifies, and drives the work of heating element, and described integrating circuit carries out integration control to the deviation of temperature.
As shown in Figure 2, described thermometric bridge circuit is by resistance R 1, R2, R4, R5 and thermistor R3 form, ground connection after resistance R 1 is connected with thermistor R3, resistance R 2 and resistance R 4, R5 series connection back ground connection, resistance R 1, another termination voltage reference of R2, described comparer is by operational amplifier U1, resistance R 6, R7, capacitor C 2, C3, C5 forms, the model of operational amplifier U1 is 0P07, described integrating circuit is by resistance R 11, capacitor C 1, C4 forms, described amplification driving circuit is by triode Q1, Q2, resistance R 9～R12 forms, triode Q1, the model of triode Q2 is 9013,7 pin of described operational amplifier U1 connect power supply, and through capacitor C 2 ground connection, 4 pin connect negative supply, and through capacitor C 5 ground connection, 2 pin are input end, 6 pin connect the base stage of triode Q1 through resistance R 8,2 pin connect the contact of resistance R 1 and thermistor R3,3 pin connect the contact of resistance R 2 and resistance R 4,1 pin, be connected with the resistance R 6 of capacitor C 3 and series connection between 8 pin, R7, resistance R 6, the contact of R7 is connected with 4 pin, the collector of triode Q1 connects power supply through resistance R 9, emitter connects the base stage of triode Q2 and through resistance R 10 ground connection, the emitter of triode Q2 is through resistance R 12 ground connection, the capacitor C 1 of described integrating circuit, C4, resistance R 11 is connected successively, 2 pin of another termination operational amplifier U1 of capacitor C 1, resistance R 11 connects the collector of triode Q2, is connected with heating element JR between the collector of described triode Q2 and the power supply.
Claims (2)
1, the direct current temperature control circuit, it is characterized in that: described temperature control circuit comprises the thermometric bridge circuit, comparer, integrating circuit, amplification driving circuit, the output terminal of described thermometric bridge circuit is electrically connected with the input end of comparer, the output terminal of described comparer is electrically connected with the input end of amplification driving circuit, the input end of described integrating circuit is electrically connected with comparer, the output terminal of described integrating circuit is electrically connected with the thermometric bridge circuit, described thermometric bridge measurement variation of temperature, change variation of temperature into electric signal, exporting comparer to handles, signal after comparer will be handled exports amplification driving circuit to and amplifies, drive the work of heating element, described integrating circuit carries out integration control to the deviation of temperature.
2, direct current temperature control circuit as claimed in claim 1, it is characterized in that: described thermometric bridge circuit is by resistance R 1, R2, R4, R5 and thermistor R3 form, ground connection after resistance R 1 is connected with thermistor R3, resistance R 2 and resistance R 4, R5 series connection back ground connection, resistance R 1, another termination voltage reference of R2, described comparer is by operational amplifier U1, resistance R 6, R7, capacitor C 2, C3, C5 forms, described integrating circuit is by resistance R 11, capacitor C 1, C4 forms, described amplification driving circuit is by triode Q1, Q2, resistance R 9～R12 forms, 7 pin of described operational amplifier U1 connect power supply, and through capacitor C 2 ground connection, 4 pin connect negative supply, and through capacitor C 5 ground connection, 2 pin are input end, 6 pin connect the base stage of triode Q1 through resistance R 8,2 pin connect the contact of resistance R 1 and thermistor R3,3 pin connect the contact of resistance R 2 and resistance R 4,1 pin, be connected with the resistance R 6 of capacitor C 3 and series connection between 8 pin, R7, resistance R 6, the contact of R7 is connected with 4 pin, the collector of triode Q1 connects power supply through resistance R 9, emitter connects the base stage of triode Q2 and through resistance R 10 ground connection, the emitter of triode Q2 is through resistance R 12 ground connection, the capacitor C 1 of described integrating circuit, C4, resistance R 11 is connected successively, 2 pin of another termination operational amplifier U1 of capacitor C 1, resistance R 11 connects the collector of triode Q2, is connected with heating element between the collector of described triode Q2 and the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620010483 CN200965642Y (en) | 2006-10-08 | 2006-10-08 | DC temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620010483 CN200965642Y (en) | 2006-10-08 | 2006-10-08 | DC temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200965642Y true CN200965642Y (en) | 2007-10-24 |
Family
ID=38869658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620010483 Expired - Fee Related CN200965642Y (en) | 2006-10-08 | 2006-10-08 | DC temperature control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200965642Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411382A (en) * | 2011-09-30 | 2012-04-11 | 中国兵器工业集团第二一四研究所苏州研发中心 | Temperature control circuit preventing temperature overshoot |
| CN103019274A (en) * | 2011-09-23 | 2013-04-03 | 南京熊猫汉达科技有限公司 | Electrical heating method and circuit of electronic device at low temperature |
| CN103905036A (en) * | 2014-03-26 | 2014-07-02 | 广东大普通信技术有限公司 | Temperature control circuit of constant-temperature crystal oscillator |
| CN106961750A (en) * | 2017-05-22 | 2017-07-18 | 蚌埠道生精密光电科技有限公司 | A kind of detection control apparatus of heat shrinkable tube heater |
| CN109860955A (en) * | 2019-01-31 | 2019-06-07 | 欣旺达电子股份有限公司 | Heater circuit and device |
-
2006
- 2006-10-08 CN CN 200620010483 patent/CN200965642Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103019274A (en) * | 2011-09-23 | 2013-04-03 | 南京熊猫汉达科技有限公司 | Electrical heating method and circuit of electronic device at low temperature |
| CN102411382A (en) * | 2011-09-30 | 2012-04-11 | 中国兵器工业集团第二一四研究所苏州研发中心 | Temperature control circuit preventing temperature overshoot |
| CN102411382B (en) * | 2011-09-30 | 2014-01-08 | 中国兵器工业集团第二一四研究所苏州研发中心 | Temperature control circuit preventing temperature overshoot |
| CN103905036A (en) * | 2014-03-26 | 2014-07-02 | 广东大普通信技术有限公司 | Temperature control circuit of constant-temperature crystal oscillator |
| CN103905036B (en) * | 2014-03-26 | 2017-02-08 | 广东大普通信技术有限公司 | Temperature control circuit of constant-temperature crystal oscillator |
| CN106961750A (en) * | 2017-05-22 | 2017-07-18 | 蚌埠道生精密光电科技有限公司 | A kind of detection control apparatus of heat shrinkable tube heater |
| CN109860955A (en) * | 2019-01-31 | 2019-06-07 | 欣旺达电子股份有限公司 | Heater circuit and device |
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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: 20071024 Termination date: 20101008 |