CN205880705U - Temperature control system - Google Patents
Temperature control system Download PDFInfo
- Publication number
- CN205880705U CN205880705U CN201620630674.4U CN201620630674U CN205880705U CN 205880705 U CN205880705 U CN 205880705U CN 201620630674 U CN201620630674 U CN 201620630674U CN 205880705 U CN205880705 U CN 205880705U
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- China
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- resistance
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- electric capacity
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Abstract
The utility model discloses a temperature control system, put U1 including fortune, chip U2, resistance R1, diode D1, electric capacity C1, triode VT1 and thermistor RT, chip U2 pin 8 is connected respectively to chip U2 pin 4, resistance R6, power VCC, U1 pin 5 is put to fortune, resistance R2 and resistance R7, output vo and resistance R11 are connected respectively to chip U2 pin 3, chip U2 pin 7 is connected respectively to chip U2 pin 6, the electric capacity C2 and the resistance R6 other end, the electric capacity C2 other end is connected respectively to chip U2 pin 1, diode D1 is anodal, triode VT1 projecting pole, resistance R5, electric capacity C1, resistance R1 and resistance R3 and ground connection. The utility model discloses an use chip NE555 and the fortune to put LM324, control output vo's that can be accurate output pulse width is fit for various temperature control's system, and circuit structure is simple, and the electronic component of use is cheap, especially adapted using widely.
Description
Technical field
This utility model relates to a kind of control system, specifically a kind of temperature control system.
Background technology
Along with the development of science and technology, the application of sensor is more and more extensive, traditional temperature sensor, light sensor etc.
All it is employed for every field, greatly facilitates the life of people, and along with the intelligentized miniature of modern control system, as
Volume and the cost of what control temperature control system become the research direction in industry.
Utility model content
The purpose of this utility model is to provide the temperature control system of a kind of low cost, to solve in above-mentioned background technology
The problem proposed.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of temperature control system, including amplifier U1, chip U2, resistance R1, diode D1, electric capacity C1, audion VT1 and
Critesistor RT, described chip U2 pin 4 connects chip U2 pin 8, resistance R6, power supply VCC, amplifier U1 pin 5, resistance respectively
R2 and resistance R7, chip U2 pin 3 connects output end vo and resistance R11 respectively, and chip U2 pin 6 connects chip U2 pin respectively
7, electric capacity C2 and the resistance R6 other end, chip U2 pin 1 connects the electric capacity C2 other end, diode D1 positive pole, audion VT1 respectively
Emitter stage, resistance R5, electric capacity C1, resistance R1 and resistance R3 ground connection, chip U2 pin 2 connects diode D1 negative pole and electricity respectively
Resistance R10, the resistance R10 other end connects amplifier U1 pin 1, and amplifier U1 pin 2 connects resistance R8, and the resistance R8 other end connects respectively
The resistance R2 other end, the resistance R3 other end and critesistor RT, the critesistor RT other end connects the resistance R1 other end, described fortune
Putting U1 pin 3 and connect resistance R9, the resistance R9 other end connects the resistance R5 other end and resistance R4 respectively, and the resistance R4 other end is respectively
Connecting triode VT1 colelctor electrode, the electric capacity C1 other end and the resistance R7 other end, described amplifier U1 model is LM324.
As this utility model further scheme: described chip U2 model is NE555.
Compared with prior art, the beneficial effects of the utility model are: this utility model is by using chip NE555 and fortune
Putting LM324, it is possible to the output pulse width of control output end Vo accurately, be suitable for various temperature controlled systems, circuit structure is simple,
The electronic component used is cheap, is especially suitable for promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of temperature control system.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Referring to Fig. 1, in this utility model embodiment, a kind of temperature control system, including amplifier U1, chip U2, resistance
R1, diode D1, electric capacity C1, audion VT1 and critesistor RT, chip U2 pin 4 connects chip U2 pin 8, resistance respectively
R6, power supply VCC, amplifier U1 pin 5, resistance R2 and resistance R7, chip U2 pin 3 connects output end vo and resistance R11, core respectively
Sheet U2 pin 6 connects chip U2 pin 7, electric capacity C2 and the resistance R6 other end respectively, and it is another that chip U2 pin 1 connects electric capacity C2 respectively
One end, diode D1 positive pole, audion VT1 emitter stage, resistance R5, electric capacity C1, resistance R1 and resistance R3 ground connection, chip U2 draws
Foot 2 connects diode D1 negative pole and resistance R10 respectively, and the resistance R10 other end connects amplifier U1 pin 1, and amplifier U1 pin 2 connects
Resistance R8, the resistance R8 other end connects the resistance R2 other end, the resistance R3 other end and critesistor RT respectively, and critesistor RT is another
One end connect the resistance R1 other end, amplifier U1 pin 3 connects resistance R9, the resistance R9 other end connect respectively the resistance R5 other end and
Resistance R4, the resistance R4 other end connecting triode VT1 colelctor electrode, the electric capacity C1 other end and the resistance R7 other end, amplifier U1 respectively
Model is LM324.
Chip U2 model is NE555.
Operation principle of the present utility model is: refer to Fig. 1, and circuit is by critesistor RT, amplifier U1 and monostable time delay electricity
Roads etc. form, and amplifier U1 is connected into voltage comparator, and the homophase termination of amplifier U1 includes the electricity of the critesistor of negative temperature coefficient
Resistance bridge, end of oppisite phase connecting resistance R7 and the charge circuit of electric capacity C1, when the temperature increases, A point current potential declines, when being brought down below C1
On charging voltage time, the output of amplifier U1 transmits low level, makes chip U2 set, chip U2 pin 3 transmit high level, with
Time, audion VT1 turns on, and the electric charge on electric capacity C1 is discharged rapidly by audion VT1, and the high level time of chip U2 output is i.e.
Low level time t2 for t1=1.1R6*C2, chip U2 output is determined by ambient temperature, and ambient temperature is the highest, and t2 is the least, temperature
Degree and time are inversely proportional to.
Claims (2)
1. a temperature control system, including amplifier U1, chip U2, resistance R1, diode D1, electric capacity C1, audion VT1 and heat
Quick resistance RT, it is characterised in that described chip U2 pin 4 connects chip U2 pin 8, resistance R6, power supply VCC, amplifier U1 respectively
Pin 5, resistance R2 and resistance R7, chip U2 pin 3 connects output end vo and resistance R11 respectively, and chip U2 pin 6 connects respectively
Chip U2 pin 7, electric capacity C2 and the resistance R6 other end, chip U2 pin 1 is just connecting the electric capacity C2 other end, diode D1 respectively
Pole, audion VT1 emitter stage, resistance R5, electric capacity C1, resistance R1 and resistance R3 ground connection, chip U2 pin 2 connects two poles respectively
Pipe D1 negative pole and resistance R10, the resistance R10 other end connects amplifier U1 pin 1, and amplifier U1 pin 2 connects resistance R8, and resistance R8 is another
One end connects the resistance R2 other end, the resistance R3 other end and critesistor RT respectively, and the critesistor RT other end connects resistance R1
The other end, described amplifier U1 pin 3 connects resistance R9, and the resistance R9 other end connects the resistance R5 other end and resistance R4 respectively, electricity
The resistance R4 other end connecting triode VT1 colelctor electrode, the electric capacity C1 other end and the resistance R7 other end respectively, described amplifier U1 model is
LM324。
Temperature control system the most according to claim 1, it is characterised in that described chip U2 model is NE555.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620630674.4U CN205880705U (en) | 2016-06-24 | 2016-06-24 | Temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620630674.4U CN205880705U (en) | 2016-06-24 | 2016-06-24 | Temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205880705U true CN205880705U (en) | 2017-01-11 |
Family
ID=57691801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620630674.4U Expired - Fee Related CN205880705U (en) | 2016-06-24 | 2016-06-24 | Temperature control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205880705U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726704A (en) * | 2018-05-24 | 2018-11-02 | 曹会鹃 | A kind of multi-filtering environmental protection water purifier |
-
2016
- 2016-06-24 CN CN201620630674.4U patent/CN205880705U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726704A (en) * | 2018-05-24 | 2018-11-02 | 曹会鹃 | A kind of multi-filtering environmental protection water purifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20170111 Termination date: 20170624 |