Design of Automated Distillation Analyzer Based on STM32

2011 ◽  
Vol 383-390 ◽  
pp. 1215-1218
Author(s):  
Wen Gang Chen ◽  
Xiao Jie Song ◽  
Wei Liu
Keyword(s):  
Temperature Control ◽  
Control Method ◽  
Control Unit ◽  
Test Accuracy ◽  
Thermoelectric Cooler ◽  
Control Performance ◽  
Accurate Temperature ◽  
Wireless Module ◽  
And Control ◽  
Accurate Temperature Control

Aiming to solve the problems of inaccuracy in temperature control and the slow reaction in condensing system in the automated distillation analyzer, an approach which combining electrical fan and thermoelectric cooler was put forward, using STM32 as the control unit; accurate temperature control during the distillation process was realized, data collection and processing can be completed by the control unit, and the wireless module can accomplish communication and control the analyzer under the instructions of computer. With this temperature control method, the automation and test accuracy of distillation analyzer can be enhanced, thus ensuring better ratio of performance-to-price and control performance.

Design of Automated Distillation Analyzer Based on STM32

2012 ◽  
Vol 433-440 ◽  
pp. 2607-2610
Author(s):  
Wen Gang Chen ◽  
Xiao Jie Song ◽  
Wei Liu
Keyword(s):  
Temperature Control ◽  
Control Method ◽  
Control Unit ◽  
Test Accuracy ◽  
Thermoelectric Cooler ◽  
Control Performance ◽  
Accurate Temperature ◽  
Wireless Module ◽  
And Control ◽  
Accurate Temperature Control

Aiming to solve the problems of inaccuracy in temperature control and the slow reaction in condensing system in the automated distillation analyzer, an approach which combining electrical fan and thermoelectric cooler was put forward, using STM32 as the control unit; accurate temperature control during the distillation process was realized, data collection and processing can be completed by the control unit, and the wireless module can accomplish communication and control the analyzer under the instructions of computer. With this temperature control method, the automation and test accuracy of distillation analyzer can be enhanced, thus ensuring better ratio of performance-to-price and control performance.

Active and accurate temperature control of terahertz functional devices via micro-hotplate system

2021 ◽  
Author(s):  
Yuting Zhang ◽  
yuan xiao hao ◽  
Wei Huang ◽  
Wentao Zhang ◽  
Jiaqi Wang
Keyword(s):  
Active Control ◽  
Temperature Control ◽  
Control Method ◽  
Control Process ◽  
Metamaterial Absorber ◽  
Temperature Control System ◽  
Heating And Cooling ◽  
Accurate Temperature ◽  
Silicon Based ◽  
Accurate Temperature Control

Abstract Based on the problem that the intensity of excitation source is not easy to regulate by the traditional active control method, this paper presents an accurate temperature control system based on micro-hotplate for the first time. This system realizes the active control of terahertz metamaterial functional devices, and implements various functions by using the proposed accurate temperature control process. The temperature control characteristics of micro-hotplate are introduced into the design of terahertz functional devices by taking a vanadium dioxide (VO₂ ) metamaterial absorber as an example. In this design, a silicon-based micro-hotplate is used to heat the metamaterial absorber. According to the phase transition characteristics of VO₂ , the alteration of temperature leads to conductivity change, so as to realize the active control of the absorber. At the same time, this paper also analyzes the heating and cooling time of the micro-hotplate. The simulation results show that, by using the micro-hotplate to heat the metamaterial functional devices, the temperature adjustment speed is reasonably high and the controllable performance is excellent. The test results shows that the surface temperature can be controlled between 40 ℃ and 80 ℃ , and the temperature difference of the working area can be kept within 1℃ . The temperature control of the micro-hotplate is accurately controlled, resulting in the great performance of the metamaterial functional devices.

The Method of Improving Precision of Micro Injection Molding Machine Temperature Control

2013 ◽  
Vol 372 ◽  
pp. 354-359
Author(s):  
Sheng De Tang ◽  
Hong Xu ◽  
Da Ming Wu ◽  
Ya Jun Zhang
Keyword(s):  
Injection Molding ◽  
Temperature Control ◽  
Control Method ◽  
Polymer Melt ◽  
Molding Machine ◽  
Micro Injection Molding ◽  
Injection Molding Machine ◽  
Mathematical Algorithm ◽  
Accurate Temperature ◽  
Accurate Temperature Control

the temperature control accuracy of polymer melt is the main factor affecting quality precision of final products. In this paper, we study the method of improving the precision of temperature control based on control system of micro injection molding machine. In order to avoid big overshoot in the traditional PID control, we use gradual approximation control method based on gradual approximation mathematical algorithm to realize fast and accurate temperature control of the micro injection molding machine. Experiment results show that effective combination of the traditional PID and gradual approximation method can realize accurate temperature control of micro injection molding machine, and precision of temperature control can be improved up to±0.5°C.

scholarly journals Development of Accurate Temperature Control in Hot Strip Mill

1995 ◽  
Vol 81 (3) ◽  
pp. 191-196
Author(s):  
Takashi ODA ◽  
Yoshitaka KONDO ◽  
Seiji KONISHI ◽  
Hironori MURAKAMI ◽  
Masayoshi SUEHIRO ◽  
...  
Keyword(s):  
Temperature Control ◽  
Hot Strip Mill ◽  
Hot Strip ◽  
Accurate Temperature ◽  
Accurate Temperature Control

A Fast and Accurate Temperature-Control System Using Smart Temperature Sensors.

1998 ◽  
pp. 247-254
Author(s):  
Paul R. van der Meer ◽  
Gerard C. M. Meijer ◽  
Michiel J. Vellekoop ◽  
Harry M. M. Kerkvliet ◽  
Ton J. J. van den Boom
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Temperature Sensors ◽  
Temperature Control System ◽  
Accurate Temperature ◽  
Accurate Temperature Control

scholarly journals A System for Accurate Temperature Control of Small Fluid Baths

1979 ◽  
Vol 22 (87) ◽  
pp. 389-391
Author(s):  
V. I. Morgan
Keyword(s):  
Temperature Control ◽  
Electrical Heating ◽  
Temperature Controller ◽  
Accurate Temperature ◽  
Accurate Temperature Control

AbstractA temperature controller is described which uses a thermistor sensor and electrical heating to maintain the temperature of a small bath of fluid to within a few millidegrees.

Thermal Analysis of a Microfluidic Preconcentrator for Portable Micro Gas Analysis Systems

2009 ◽  
Author(s):  
Z. Jay Cao ◽  
Aaron J. Knobloch ◽  
Wei-Cheng Tian ◽  
Stacey J. Kennerly ◽  
Nannan Chen ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Gas Chromatography ◽  
Power Consumption ◽  
Temperature Control ◽  
Metal Organic Framework ◽  
Gas Analysis ◽  
Design Changes ◽  
Accurate Temperature ◽  
Metal Organic ◽  
Accurate Temperature Control

Two key challenges to portable gas chromatography are reducing preconcentrator power consumption and accurate temperature control of adsorbent. This paper presents the results of thermal modeling performed to optimize a microfabricated preconcentrator based on a silicon microhotplate and utilizing Metal Organic Framework (MOF) adsorbents. From this modeling, two design changes are presented that reduce the power consumption by 1.5 W and reduce temperature variation across the microhotplate by 50%.

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