CN106774492A - A kind of small-sized quick high accuracy constant temperature system based on TEC - Google Patents
A kind of small-sized quick high accuracy constant temperature system based on TEC Download PDFInfo
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- CN106774492A CN106774492A CN201611093723.6A CN201611093723A CN106774492A CN 106774492 A CN106774492 A CN 106774492A CN 201611093723 A CN201611093723 A CN 201611093723A CN 106774492 A CN106774492 A CN 106774492A
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- temperature
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- constant temperature
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- 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
- G05D23/1917—Control of temperature characterised by the use of electric means using digital means
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Abstract
The invention discloses a kind of small-sized quick high accuracy constant temperature system based on TEC, by temperature control unit, embedded controller, temperature collecting cell and insulating box are constituted；The embedded controller is by exporting information transmission that PWM ripples will be detected to temperature control unit, the temperature information that the temperature collecting cell will be embedded on the semiconductor heating cooling piece inside insulating box is collected, the two directions' inputing port of the embedded controller is also connected by RS232 communication modules with PC, and by the webserver and mobile terminal communication.Embedded controller controls H-bridge circuit to run by exporting heating signal or cooling signals, to maintain constant temperature, using new heating Refrigeration Technique, with small volume, fast response time, high accuracy, without refrigerant, be easily achieved heating refrigeration conversion the features such as, it is had a wide range of applications in terms of microminiature constant temperature system.
Description
Technical field
The present invention relates to constant temperature system technical field, specially a kind of small-sized quick high accuracy constant temperature system based on TEC.
Background technology
Temperature is important parameter in industrial production and experimental study, and temperature control and the accuracy for detecting directly affect product
The performance of product or the accuracy of experimental result.Semiconductor devices thermo-resistance measurement such as based on electrical parameter method and thermal transient method of testing
In, for the High Accuracy Constant Temperature environment that device under test provides quick response is the important prerequisite that obtains accurate thermal resistance value, but at present
High-precision temperature survey cannot industrially be realized, although high-precision temperature survey can be realized in the lab, but grasped
The process of work can be subject to very many interference, it is impossible to extensive operation, be less useful for, in factory process temperature survey, not only going out
Existing required precision does not reach standard, operates also more complicated.
The content of the invention
For problem above, the invention provides a kind of small-sized quick high accuracy constant temperature system based on TEC, using new
Heating Refrigeration Technique, with small volume, fast response time, high accuracy, without refrigerant, be easily achieved heating refrigeration conversion etc. spy
Point, makes it be had a wide range of applications in terms of microminiature constant temperature system, in can effectively solving the problems, such as background technology.
To achieve the above object, the present invention provides following technical scheme：A kind of small-sized quick high accuracy constant temperature based on TEC
System, by temperature control unit, embedded controller, temperature collecting cell and insulating box are constituted；The embedded controller leads to
The output information transmission that will detect of PWM ripples is crossed to temperature control unit, and constant temperature is set by controlling temperature control unit
Temperature inside case；
The temperature information that the temperature collecting cell will be embedded on the semiconductor heating cooling piece inside insulating box is collected,
And information of voltage is sent to the data terminal of embedded controller using parallel acquisition circuit, and the surface temperature value that will be collected
Voltage signal is converted to, it is inclined with desired temperature to calculate the voltage signal corresponding temperature measured value using embedded controller
Difference；
The two directions' inputing port of the embedded controller is also connected by RS232 communication modules with PC, and by network
Server and mobile terminal communication；
The temperature control unit includes H-bridge circuit and constant-current source circuit, and H-bridge circuit is used to control TEC to heat refrigeration switching, embedding
Enter formula controller and control H-bridge circuit to run by exporting heating signal or cooling signals, to maintain constant temperature.
Used as a kind of preferred technical scheme of the present invention, the embedded controller is using STM32F103RBT6 series
Process chip, and external reset circuit, outer clock circuit, key circuit and communication serial port module composition are simple embedded
Minimum system.
Used as a kind of preferred technical scheme of the present invention, the semiconductor heating cooling piece is using maximum temperature difference up to 60 degree
TEC1-12706 series process chip, and heat cooling pieces with 4 groups of semiconductors and be laid in insulating box lower section.
Used as a kind of preferred technical scheme of the present invention, the H-bridge circuit is made up of two parts：Heating signal HOT and system
Cold signal COLD controls H-bridge circuit, and is connected with the G poles of FET MOSFET in the input of H-bridge circuit.
Used as a kind of preferred technical scheme of the present invention, the temperature collecting cell uses K-type thermocouple and temperature acquisition
The thermometric that chip is combined, the temperature acquisition chip uses the process chip of MAV6675 series, in temperature acquisition chip
Portion also obeys SPI communications protocol, can be connected with the data terminal of embedded controller by control line.
Used as a kind of preferred technical scheme of the present invention, the reset circuit is mainly using the Low level effective of reset signal
Mode be controlled, the outer clock circuit according to the rising edge of clock or when there is reset signal just effectively.
Compared with prior art, the beneficial effects of the invention are as follows：This is based on the small-sized quick high accuracy constant temperature system of TEC,
With STM32F103RBT6 as microcontroller, microcontroller is connected with PC machines by serial ports RS232, transmission temperature
Degree setting value and temperature measured value, and temperature collection circuit collection TEC surface temperature values are converted to voltage signal, microcontroller meter
The deviation of the voltage signal corresponding temperature measured value and desired temperature is calculated, the PWM exported using Digital PID Algorithm real-time adjustment
Value, i.e. adjustment flow through the current value of constant-current source circuit, thermostatic control are finally realized, using new heating Refrigeration Technique, with body
Product small, fast response time, high accuracy, without refrigerant, be easily achieved heating refrigeration conversion the features such as, make it in microminiature constant temperature system
System aspect has a wide range of applications.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is cross-sectional view of the present invention；
Fig. 3 is temperature acquisition chip interface schematic diagram of the present invention；
Fig. 4 is temperature-control circuit of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment：
Fig. 1 to Fig. 4 is referred to, the present invention provides a kind of technical scheme：A kind of small-sized quick high accuracy constant temperature system based on TEC
System, by temperature control unit, embedded controller, temperature collecting cell and insulating box are constituted；The embedded controller passes through
The information transmission that output PWM ripples will be detected sets insulating box to temperature control unit by controlling temperature control unit
Internal temperature；
The temperature information that the temperature collecting cell will be embedded on the semiconductor heating cooling piece inside insulating box is collected,
And information of voltage is sent to the data terminal of embedded controller using parallel acquisition circuit, and the surface temperature value that will be collected
Voltage signal is converted to, it is inclined with desired temperature to calculate the voltage signal corresponding temperature measured value using embedded controller
Difference, the semiconductor heating cooling piece uses maximum temperature difference up to the process chip of 60 degree of TEC1-12706 series, and uses 4 groups
Semiconductor heating cooling piece is laid in insulating box lower section.
The embedded controller uses the process chip of STM32F103RBT6 series, and when external reset circuit, outside
Clock circuit, key circuit and communication serial port module constitute simple Embedded Minimum System, the embedded controller it is double
Also it is connected with PC by RS232 communication modules to input port, and by the webserver and mobile terminal communication, it is described
Reset circuit is mainly controlled by the way of the Low level effective of reset signal, and the outer clock circuit is according to clock
Rising edge or when there is reset signal just effectively.
The temperature control unit includes H-bridge circuit and constant-current source circuit, and H-bridge circuit is used to control TEC heating refrigeration to cut
Change, embedded controller controls H-bridge circuit to run by exporting heating signal or cooling signals, to maintain constant temperature, the temperature
The thermometric that degree collecting unit is combined using K-type thermocouple and temperature acquisition chip, the temperature acquisition chip uses MAV6675
The process chip of series, SPI communications protocol is also obeyed in the inside of temperature acquisition chip, can be by control line and embedded control
The data terminal of device processed is connected, and the H-bridge circuit is made up of two parts：Heating signal HOT and cooling signals COLD control H bridge electricity
Road, and be connected with the G poles of FET MOSFET in the input of H-bridge circuit.
Operation principle of the invention：This is based on the small-sized quick high accuracy constant temperature system of TEC, is with STM32F103RBT6
, with PC machines be connected microcontroller by serial ports RS232 by microcontroller, and transmission desired temperature is surveyed with temperature
Value, and temperature collection circuit collection TEC surface temperature values are converted to voltage signal, microcontroller calculates voltage signal correspondence temperature
Degree measured value and the deviation of desired temperature, constant current is flowed through using the PWM value of Digital PID Algorithm real-time adjustment output, i.e. adjustment
The current value of source circuit, finally realizes thermostatic control, using new heating Refrigeration Technique, with small volume, fast response time, height
Precision, without refrigerant, be easily achieved heating refrigeration conversion the features such as, make its in terms of microminiature constant temperature system have widely should
With.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of small-sized quick high accuracy constant temperature system based on TEC, it is characterised in that by temperature control unit, embedded control
Device processed, temperature collecting cell and insulating box are constituted；The embedded controller is by exporting the information transmission that PWM ripples will be detected
To temperature control unit, and the temperature inside insulating box is set by controlling temperature control unit；
The temperature information that the temperature collecting cell will be embedded on the semiconductor heating cooling piece inside insulating box is collected,
And information of voltage is sent to the data terminal of embedded controller using parallel acquisition circuit, and the surface temperature value that will be collected
Voltage signal is converted to, it is inclined with desired temperature to calculate the voltage signal corresponding temperature measured value using embedded controller
Difference；
The two directions' inputing port of the embedded controller is also connected by RS232 communication modules with PC, and by network
Server and mobile terminal communication；
The temperature control unit includes H-bridge circuit and constant-current source circuit, and H-bridge circuit is used to control TEC to heat refrigeration switching, embedding
Enter formula controller and control H-bridge circuit to run by exporting heating signal or cooling signals, to maintain constant temperature.
2. a kind of small-sized quick high accuracy constant temperature system based on TEC according to claim 1, it is characterised in that described
Embedded controller is using STM32F103RBT6 serial process chip, and external reset circuit, outer clock circuit, button
Circuit and communication serial port module constitute simple Embedded Minimum System.
3. a kind of small-sized quick high accuracy constant temperature system based on TEC according to claim 1, it is characterised in that described
Semiconductor heating cooling piece using maximum temperature difference up to 60 degree of TEC1-12706 serial process chip, and with 4 groups of semiconductors
Heating cooling piece is laid in insulating box lower section.
4. a kind of small-sized quick high accuracy constant temperature system based on TEC according to claim 1, it is characterised in that described
The thermometric that temperature collecting cell is combined using K-type thermocouple and temperature acquisition chip, the temperature acquisition chip is used
MAV6675 series process chip, also obey SPI communications protocol in the inside of temperature acquisition chip, can by control line with
The data terminal of embedded controller is connected.
5. a kind of small-sized quick high accuracy constant temperature system based on TEC according to claim 1, it is characterised in that the H
Bridge circuit is made up of two parts：Heating signal HOT and cooling signals COLD control H-bridge circuit, and H-bridge circuit input with
The G poles of FET MOSFET are connected.
6. a kind of small-sized quick high accuracy constant temperature system based on TEC according to claim 1, it is characterised in that described
Reset circuit is mainly controlled by the way of the Low level effective of reset signal, and the outer clock circuit is according to clock
Rising edge or when there is reset signal just effectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611093723.6A CN106774492A (en) | 2016-12-02 | 2016-12-02 | A kind of small-sized quick high accuracy constant temperature system based on TEC |
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| CN201611093723.6A CN106774492A (en) | 2016-12-02 | 2016-12-02 | A kind of small-sized quick high accuracy constant temperature system based on TEC |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168413A (en) * | 2017-06-14 | 2017-09-15 | 中国农业科学院兰州畜牧与兽药研究所 | Apply the thermostatic control system in full-automatic food safely and fast detector |
| CN107491111A (en) * | 2017-08-16 | 2017-12-19 | 中国船舶工业系统工程研究院 | A kind of temperature control equipment and method based on TEC |
| CN108508819A (en) * | 2018-06-29 | 2018-09-07 | 公安部第研究所 | A kind of thermal cycler TT＆C system based on embedded technology |
| CN110674007A (en) * | 2019-09-05 | 2020-01-10 | 浪潮电子信息产业股份有限公司 | Server heat dissipation system, method and device and whole cabinet server |
| WO2020240528A1 (en) * | 2019-05-28 | 2020-12-03 | Man & Machine, Inc. | Method and apparatus to ruggedize a mobile device for public safety or mobile use |
| CN114647265A (en) * | 2021-12-21 | 2022-06-21 | 北京元景科技有限公司 | High-precision temperature control system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168413A (en) * | 2017-06-14 | 2017-09-15 | 中国农业科学院兰州畜牧与兽药研究所 | Apply the thermostatic control system in full-automatic food safely and fast detector |
| CN107491111A (en) * | 2017-08-16 | 2017-12-19 | 中国船舶工业系统工程研究院 | A kind of temperature control equipment and method based on TEC |
| CN108508819A (en) * | 2018-06-29 | 2018-09-07 | 公安部第研究所 | A kind of thermal cycler TT＆C system based on embedded technology |
| WO2020240528A1 (en) * | 2019-05-28 | 2020-12-03 | Man & Machine, Inc. | Method and apparatus to ruggedize a mobile device for public safety or mobile use |
| CN110674007A (en) * | 2019-09-05 | 2020-01-10 | 浪潮电子信息产业股份有限公司 | Server heat dissipation system, method and device and whole cabinet server |
| CN114647265A (en) * | 2021-12-21 | 2022-06-21 | 北京元景科技有限公司 | High-precision temperature control system |
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Application publication date: 20170531 |