CN106647865A - Intelligent temperature control device - Google Patents
Intelligent temperature control device Download PDFInfo
- Publication number
- CN106647865A CN106647865A CN201710107723.5A CN201710107723A CN106647865A CN 106647865 A CN106647865 A CN 106647865A CN 201710107723 A CN201710107723 A CN 201710107723A CN 106647865 A CN106647865 A CN 106647865A
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- CN
- China
- Prior art keywords
- temperature
- circuit
- signal
- control
- intelligent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
Abstract
The invention provides an intelligent temperature control device. The device comprises: a thermocouple sensor (1) converts the acquired temperature signal into a voltage signal and sends the voltage signal to a cold-end compensation circuit (2), the signal is amplified by an amplifying circuit (3) and then sent to an A/D conversion interface of a controller STM32 (4), the analog voltage signal is converted into a digital signal, the digital signal is calculated by a chip algorithm to obtain a real-time temperature, the temperature value is transmitted to an LCD display screen (5) for displaying by an SPI bus of the controller STM32 (4), simultaneously, the controller STM32 (4) carries out PID adjustment according to the difference between the real-time temperature and the temperature set by a user, and a relay closure PWM pulse is obtained via a relay control circuit (6) to change the control on a heating circuit (7), thereby realizing intelligent control on the temperature. New attempts are made to thermocouple type selection and cold-end compensation methods, and the temperature is detected and controlled by using an embedded real-time operating system u-Cos-II, so that the temperature control system is more intelligent.
Description
Technical field
The present invention relates to temperature automatic control field, more particularly to a kind of intelligent attemperating unit.
Background technology
In the production fields such as industry manufacture, refrigeration and daily life, as the key factor of current environment
One of temperature be widely used as reference factor to use by people, for ensureing the normal operation of work in every, so with temperature
The temperature control system designed based on degree parameter by extensive design and use, believe by the thermometer collecting temperature of traditional sense
Breath, not only acquisition precision is low, poor real, and the labor intensity of operator is high, is unfavorable for being widely popularized；Sometimes at some
In specific occasion, because environmental factorss will cause data acquisition difficult, at this moment the wasting of resources is easily caused using traditional method,
And poor operability, precision is low, the carrying out of work is limited to varying degrees and is developed, so, to high accuracy, it is low into
Originally, the demand of the good temperature control system of real-time constantly increases, and the research and development of the electronic product related to temperature control become
Focus.
In productive life, especially in the field of the essential industrys such as oil, chemical industry, metallurgy, electric power, temperature is surveyed
Amount and the application for controlling are very extensive, and the control of temperature can directly influence the quality of product, such as in metal smelting
During, temperature conditionss can be more accurately controlled, according to statistics, about 15% metal can be saved, power consumption will be reduced
17%, labour force consumes will reduce about 18%, and it is considerable thus temperature to be measured and is monitored in every field
One step, and have many industries to be at work to need a large amount of firing equipments that these are monitored to temperature, for example need
The heating furnace of heat treatment, crucible furnace is wanted to be used to melt metal, also some heating reaction furnaces etc., these equipment have very to temperature
High requirement, so temperature just becomes important controlled parameter and temperature control system is accelerated in Industry Control, then
Development speed.
With the development of information intelligence industry, every field is increasingly stricter to temperature controlled requirement, increasingly
Height, then accelerates the development of temperature controller, and intelligent temperature controller is increasingly welcome by everybody, and application is more and more extensive, due to
ARM microprocessor performs that speed is fast and various advantages, so the intelligent temperature controller development based on ARM is swift and violent.
The content of the invention
Present invention aims to deficiency of the prior art, it is proposed that a kind of intelligent attemperating unit, the device
New trial is all done on thermocouple type selecting, Method of Cold Terminal Compensation, and has used embedded real-time operating system u-Cos-
II carries out temperature inspection and control so that temperature control system is more intelligent.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：A kind of intelligent attemperating unit, its feature
It is：
Preferably, described thermocouple sensor is K-type thermocouple；
Preferably, described cold junction compensation circuit is electric bridge auto compensatng circuit；
Preferably, described controller STM32 is with STM32F103VET6 microcontrollers as core.
Advantages of the present invention and good effect are.
（1）The K-type thermocouple adopted in apparatus of the present invention linearity for traditional thermocouple is relatively good, thermoelectricity
Than larger, remolding sensitivity is higher, and stability is relatively good with uniformity for kinetic potential, and antioxygenic property is strong, and this causes this device than tradition
Temperature signal more accurately can be converted to voltage signal by device.
（2）The electric bridge Auto-Compensation-Method that apparatus of the present invention are adopted, the uneven potential for producing that make use of electric bridge plays benefit
Repay thermocouple because the temperature of cold end change and caused thermoelectrical potential changing value effect, thermocouple and imbalance electricity
The polarities of potentials that bridge is produced plays a part of Cold-junction compensation conversely, cancel out each other.
（3）The present invention has sensitivity high!Stability is strong and the simple advantage of apparatus structure.
Description of the drawings
Fig. 1 is a kind of structured flowchart of intelligent attemperating unit monitoring device of the present invention.
Fig. 2 is thermocouple bridge compensation circuit of the present invention.
Fig. 3 is amplifying circuit of the present invention.
Fig. 4 is control circuit of the present invention.
Fig. 5 is global procedures flow chart of the present invention.
Fig. 6 is control circuit flow chart of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail with specific embodiment.
As shown in figure 1, the device includes thermocouple sensor（1）, cold junction compensation circuit（2）, signal amplification circuit（3）、
Controller STM32（4）, LCD display（5）, control relay circuit（6）, heater circuit（7）；
Thermocouple sensor（1）The temperature signal of collection is converted to into voltage signal, and then voltage signal cold end is sent into into and is mended
Repay circuit（2）, then by signal amplification circuit（3）Controller STM32 is sent into after signal is amplified（4）A/D translation interfaces, will
The voltage signal of simulation is converted to the manageable digital signal of chip, and the digital signal is calculated in chip internal through algorithm
Afterwards, real time temperature now is obtained, using controller STM32（4）Spi bus send temperature value to LCD display（5）It is aobvious
Show, while controller STM32（4）PID regulations are carried out according to the difference of real time temperature and user's design temperature, by relay control
Circuit processed（6）The pwm pulse of relay closure is obtained to change to heater circuit（7）Control, so as to realize the intelligence to temperature
Can control.
Electric bridge penalty method is exactly that the uneven potential for producing that make use of electric bridge goes compensation, and thermocouple is because of cold junction temperature
Change and the changing value of caused thermoelectrical potential, as shown in Figure 2.
Compensator bridge is made up of tetra- bridge arms of resistance R1, R2, R3, Rcu and bridge regulated power supply, and R1, R2, R3 are by manganese
Copper wire coiling, temperature-coefficient of electrical resistance very little, Rcu is that, by copper wire coiling, its resistance is raised with temperature and increased, by compensator bridge
In being connected on thermocouple temperature measurement loop, under state of temperatures of the resistance Rcu with the cold end of thermocouple is in.
In the amplifier of invention device design, as shown in figure 3, R1, R2, R3, R4, R5, R6 are the fixations for being given
Value, the Rf in circuit belongs to variable resistance, and by adjusting the value for changing variable resistance Rf voltage gain can be just changed, and reaches certainly
Oneself wants the multiple for amplifying.Two input signals v1 and v2 are input into from the in-phase end of two amplifiers of A1, A2, are existed empty short
With empty disconnected phenomenon, so that the electric current into circuit becomes 0, input resistance i.e. Ri → ∞, so this amplifier is big
Family is widely used in industry-by-industry field.
The course of work of control circuit, as shown in figure 4, STM32F103VET6 chips outfan export pwm pulse, three
After pole pipe conducting, electromagnetic relay adhesive, heater circuit heating, when temperature is heated to the temperature value for setting, audion shut-off,
Cause electromagnetic relay to disconnect, heater circuit quits work, heater circuit is controlled by the closure of relay, when the temperature of collection
When degree is less than the temperature for setting, make heater circuit work with dutycycle according to the frequency that PID adjusts pwm pulse, allow temperature to reach
Setting value, when the set temperature is reached, adjust appropriate pwm pulse frequency makes heater circuit in temperature constant state with dutycycle,
When heater circuit work heating is not needed, can disable intervalometer, not export pwm pulse, and relay does not also just work.
Claims (4)
1. a kind of intelligent attemperating unit, it is characterised in that the device includes thermocouple sensor（1）, cold junction compensation circuit
（2）, signal amplification circuit（3）, controller STM32（4）, LCD display（5）, control relay circuit（6）, heater circuit
（7）, thermocouple sensor（1）The temperature signal of collection is converted to into voltage signal, and then voltage signal cold end is sent into into and is mended
Repay circuit（2）, then by signal amplification circuit（3）Controller STM32 is sent into after signal is amplified（4）A/D translation interfaces, will
The voltage signal of simulation is converted to the manageable digital signal of chip, and the digital signal is calculated in chip internal through algorithm
Afterwards, real time temperature now is obtained, using controller STM32（4）Spi bus send temperature value to LCD display（5）It is aobvious
Show, while controller STM32（4）PID regulations are carried out according to the difference of real time temperature and user's design temperature, by relay control
Circuit processed（6）The pwm pulse of relay closure is obtained to change to heater circuit（7）Control, so as to realize the intelligence to temperature
Can control.
2. according to a kind of intelligent attemperating unit described in claim 1, it is characterised in that described thermocouple sensor
（1）For K-type thermocouple.
3. according to a kind of intelligent attemperating unit described in claim 1, it is characterised in that described cold junction compensation circuit
（2）For electric bridge auto compensatng circuit.
4. according to a kind of intelligent attemperating unit described in claim 1, it is characterised in that described controller STM32（4）
It is with STM32F103VET6 microcontrollers as core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710107723.5A CN106647865A (en) | 2017-02-27 | 2017-02-27 | Intelligent temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710107723.5A CN106647865A (en) | 2017-02-27 | 2017-02-27 | Intelligent temperature control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106647865A true CN106647865A (en) | 2017-05-10 |
Family
ID=58847268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710107723.5A Pending CN106647865A (en) | 2017-02-27 | 2017-02-27 | Intelligent temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106647865A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107277959A (en) * | 2017-06-27 | 2017-10-20 | 天津掌心众联科技有限公司 | A kind of electromagnetic heating system and method based on PID control |
| CN108088876A (en) * | 2017-12-29 | 2018-05-29 | 扬州大学 | It is a kind of can thermometric air-sensitive film test device and its application method |
| CN108334133A (en) * | 2018-03-28 | 2018-07-27 | 中国船舶重工集团公司第七O三研究所无锡分部 | A kind of gas turbine pulse temperature control device |
| CN112525371A (en) * | 2020-11-20 | 2021-03-19 | 华中科技大学 | Exhaust temperature acquisition system for vehicle |
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| US20050193957A1 (en) * | 2001-12-14 | 2005-09-08 | Shigeru Oshima | Animal breeding system and utilization of the system |
| US20080203178A1 (en) * | 2004-03-01 | 2008-08-28 | Neil John Barrett | Method and Apparatus for Environmental Control |
| CN201936207U (en) * | 2011-01-26 | 2011-08-17 | 成都锦华药业有限责任公司 | Temperature control system |
| CN203414189U (en) * | 2013-08-02 | 2014-01-29 | 杭州电子科技大学 | Household refuse plastic waste cracking reaction temperature detection circuit |
| CN105628236A (en) * | 2015-12-20 | 2016-06-01 | 苏州长风航空电子有限公司 | Thermocouple temperature signal acquisition method |
-
2017
- 2017-02-27 CN CN201710107723.5A patent/CN106647865A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050193957A1 (en) * | 2001-12-14 | 2005-09-08 | Shigeru Oshima | Animal breeding system and utilization of the system |
| US20080203178A1 (en) * | 2004-03-01 | 2008-08-28 | Neil John Barrett | Method and Apparatus for Environmental Control |
| CN201936207U (en) * | 2011-01-26 | 2011-08-17 | 成都锦华药业有限责任公司 | Temperature control system |
| CN203414189U (en) * | 2013-08-02 | 2014-01-29 | 杭州电子科技大学 | Household refuse plastic waste cracking reaction temperature detection circuit |
| CN105628236A (en) * | 2015-12-20 | 2016-06-01 | 苏州长风航空电子有限公司 | Thermocouple temperature signal acquisition method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107277959A (en) * | 2017-06-27 | 2017-10-20 | 天津掌心众联科技有限公司 | A kind of electromagnetic heating system and method based on PID control |
| CN108088876A (en) * | 2017-12-29 | 2018-05-29 | 扬州大学 | It is a kind of can thermometric air-sensitive film test device and its application method |
| CN108334133A (en) * | 2018-03-28 | 2018-07-27 | 中国船舶重工集团公司第七O三研究所无锡分部 | A kind of gas turbine pulse temperature control device |
| CN112525371A (en) * | 2020-11-20 | 2021-03-19 | 华中科技大学 | Exhaust temperature acquisition system for vehicle |
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