A Fuzzy Temperature Control System for Pressure-Sensitive Paint Measurement

2012 ◽  
Vol 241-244 ◽  
pp. 129-134
Author(s):  
Jian Guo Mao ◽  
Hui Yu Zhang ◽  
Guang Min Lu ◽  
Jian Kang Xu
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Current Source ◽  
Constant Current ◽  
Temperature Control System ◽  
System Control ◽  
Pressure Sensitive Paint ◽  
Constant Current Source ◽  
Semiconductor Chip ◽  
Pressure Sensitive

This template explains a design of a fuzzy temperature control system for the pressure-sensitive paint. According to the relationship between temperature difference and the current of semiconductor chip, the fuzzy system control theory, control the volume of the domain, control rules design, and design a constant current source circuit to control the current through the chip, and finally make experimental verification of the system. The system hardware uses C8051F040 MCU, temperature chip DS18B20, keyboard chip CH451.

Design of DFB Laser Drive and Temperature Control Circuit in TDLAS Gas Concentration Detection

2020 ◽  
Author(s):  
Haoqing Yang ◽  
Xiongzhu Bu ◽  
Yihan Cao ◽  
Yang Song
Keyword(s):  
Temperature Control ◽  
Detection System ◽  
Current Source ◽  
Sine Wave ◽  
Control Circuit ◽  
Constant Current ◽  
Temperature Control System ◽  
Constant Current Source ◽  
Dfb Laser ◽  
On Chip

Abstract In order to satisfy the requirements of TDLAS gas measurement, the DFB laser drive and temperature control system is designed with taking STM32F103RCT6 as the main control chip, including sine wave and sawtooth signal generation circuit, temperature acquisition circuit and temperature control circuit, etc. The sine wave and the sawtooth wave signal are respectively generated by using the DDS chip and the STM32 on-chip DAC, and the two are superimposed to control the constant current source to drive the laser. At the same time, the internal temperature of the laser is collected and controlled. The DFB laser with a center wavelength of 1653.7 nm is used to verify the CH4. The experiment proves that the system can generate stable laser driving signals and achieve precise temperature control. The temperature control accuracy can reach ±0.013 °C. The design satisfies the requirements of TDLAS gas detection system for laser driving and temperature control.

PID Parameter Setting Based on Fuzzy Control Algorithm and its Application in the Temperature Control System of Airplane

2012 ◽  
Vol 588-589 ◽  
pp. 1503-1506
Author(s):  
Fang Ding ◽  
Tao Ma
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Temperature Control ◽  
Control Algorithm ◽  
Control Method ◽  
Fuzzy Controller ◽  
Temperature Control System ◽  
System Control ◽  
Control Effect ◽  
Fuzzy Control Algorithm

This Temperature control system of aircraft cabin is a complex system with nonlinear, time-varying, model inaccurate and work environment uncertain. According to the system control requirements, the fuzzy controller with the characteristic of fast response speed, good stability and strong resistance to interference is used in the study. The system error is adjusted constantly by using fuzzy control algorithm and simulation study is conducted in the software Matlab. The results are showed that control effect of control method used in this study is better than the traditional PID control method, and dynamic performance, steady state accuracy and robustness of system is effectively improved.

The Control of Constant Current Source in Electrostatic Precipitators Based on Microcontroller

2014 ◽  
Vol 910 ◽  
pp. 340-343
Author(s):  
Zi Sheng Zhang ◽  
Xiao Dong Shi ◽  
Li Fang Liu ◽  
Zhan You Wang ◽  
Deng Yuan Song
Keyword(s):  
Control System ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Current Source ◽  
Control Process ◽  
Pulse Signal ◽  
Constant Current ◽  
Single Chip ◽  
Constant Current Source ◽  
Electrostatic Precipitators

In order to improve the efficiency of electrostatic precipitators, a control system of constant current source based on Single Chip Microcomputer (SCM) is designed. In the control process, we use the pulse signal from microcontroller P1 port as digital signals of the switch. By changing the number of contact closure control, we achieve steady flow output of different magnitude. By using closed-loop feedback control, we achieve constant monitoring of dust concentration and ensure it compliance with outlet concentration of national requirements. The results show that microcontroller control system has a strong anti-interference, high accuracy, ease of programming, etc. Used in the electrostatic precipitator, collection efficiency can be further improved.

Design of CO2 Heat Pump Water Temperature Control System Based on C8051F500 SCM and Electronic Expansion Valve

2012 ◽  
Vol 490-495 ◽  
pp. 3197-3201
Author(s):  
Ji You Fei ◽  
Kai Gao ◽  
Ran Deng ◽  
Xue Fei Yang
Keyword(s):  
Water Temperature ◽  
Heat Pump ◽  
Current Source ◽  
Constant Current ◽  
Temperature Control System ◽  
Constant Current Source ◽  
Temperature Detection ◽  
Detection Circuit ◽  
Valve Drive ◽  
Expansion Valve

The paper has designed the controlling circuit of CO2 heat pump water based on C8051F500 SCM and electronic expansion valve. The controlling circuit is composed of a temperature detection circuit and a electronic expansion valve drive As the temperature detection circuit uses a constant current source design, it would not be influenced by ambient temperature and can work in different temperature environment. This detection circuit’s temperature range is -50 °C - +135 °C. Electronic expansion valve drive circuit has added a photoelectric coupling isolation circuit to enhance its anti-interference capability. The system can adjust the size of the opening of electronic expansion valve according to water temperature. The opening adjustment can reach 480 steps; and the adjust speed is 2 steps per second.

Pulsed Driver Control System for High-Power LED

2014 ◽  
Vol 536-537 ◽  
pp. 1178-1182
Author(s):  
Xian Guang Fan ◽  
Zhen Bang Hu ◽  
Ying Jie Xu ◽  
Xiu Fen Wang ◽  
Xin Wang ◽  
...  
Keyword(s):  
Control System ◽  
High Power ◽  
Current Source ◽  
Pulse Signal ◽  
Current Control ◽  
Constant Current ◽  
Pulsed Current ◽  
Constant Current Source ◽  
Control Center ◽  
High Power Led

Pulsed current source is used to drive high-power LED in thermal analysis and testing. A new scheme to design the high-power LED pulsed current source, which integrates FPGA device, with highly quality single-chip microcomputer C8051F as the control center, is introduced. In order to obtain the LED automatic current control, the negative feedback is used in the LED pulsed driver. The pulsed current source consists of constant-current source and couple output interface controlled by square pulse signal, which ensures the stability of pulsed current, rise time and fall time. It is convenient to adjust the pulse current amplitude, pulse width, pulse cycle and sampling gate independently. Results show that the current stability of the driver control system can obtain 0.01%.

A Research on Information Collection Method for High-Precision Temperature Based on PLC Control

2014 ◽  
Vol 529 ◽  
pp. 148-152 ◽  
Author(s):  
Jin Sheng Li
Keyword(s):  
Control System ◽  
High Precision ◽  
Temperature Control ◽  
Temperature Control System ◽  
Information Collection ◽  
System Control ◽  
Pid Algorithm ◽  
Plc Control ◽  
Precision Temperature ◽  
Neural Network Algorithm

For the traditional PID algorithm, it is difficult to give a precise mathematical model which makes parameters setting of PLC temperature control system difficult. At the same time there are some defects in the system control, resulting in low system security, reliability and control quality. In order to solve the problems of the traditional algorithms, this paper proposes an information collection algorithm for temperature denoising based on high-precision PLC control, which is a combination of the PID algorithm, fuzzy control algorithms and neural network algorithm. Experiments show that the algorithm is effective to achieve the parameters self-tuning of PID, increase the accuracy of the temperature control, and are practical in the PLC temperature control system.

The Design and Implementation of Intelligent Street Lamp Control System

2012 ◽  
Vol 195-196 ◽  
pp. 1055-1059 ◽  
Author(s):  
Li Gong Cui ◽  
Yan Yan Cao ◽  
Mei Lin
Keyword(s):  
Control System ◽  
Current Source ◽  
Control Unit ◽  
Constant Current ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Constant Current Source ◽  
Keyboard Input ◽  
Street Lamp ◽  
Software And Hardware

Aiming at existed problems in traditional lamps and monitoring system, an intelligent street lamp control system based on AT89S52 as the control unit is put forward. It consists of keyboard input, clock testing and display circuit. The system uses constant current source to drive the lamps with dimming capabilities, and makes use of photoresistor to test the brightness of environment. It also alarms by the way of light and sound when the lamp fail to light. In this paper, we design software and hardware of the street lamp control system, and realize the design concept the method and the process of intelligent street lamp control system based on the single chip microcomputer.

Temperature Control System for Transformer Three-Phase 50 Hz 2500 kVA

2017 ◽  
Vol 3 (2) ◽  
pp. 88
Author(s):  
Suci Rahmatia ◽  
Marsah Zaysi Makhudzia
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Heat Loss ◽  
Temperature Control ◽  
Electrical Energy ◽  
Temperature Control System ◽  
Iron Core ◽  
Electrical Device ◽  
Optimal Control System ◽  
Three Phase

<p><em>Abstrak <strong>- </strong></em><strong>Transformator adalah peralatan listrik yang sangat vital dalam proses pembangkitan maupun transmisi energi listrik karena transformator dapat menaikkan atau menurunkan tegangan. Pada proses menaikkan dan menurunkan tegangan biasanya sering timbul panas akibat rugi – rugi tembaga pada inti besi dan kumparannya sehingga pada kondisi overload akan menimbulkan pemanasan yang berlebih dan dapat mempengaruhi kinerja transformator. Oleh karena itu dibuat sistem kontrol temperatur pada transformer yang dapat mengontrol temperatur di dalam transformator saat bekerja pada kondisi overload, sehigga transformatornya tidak terbakar. Dial thermometer digunakan sebagai alat yang mengontrol temperatur transformator pada sistem kontrol temperatur. Agar mendapatkan sistem kontrol yang optimal, maka setting temperatur pada dial thermometer di sesuaikan dengan temperatur maksimal tranformator dapat bekerja. Sehingga pada saat temperatur tertentu dial thermometer dapat memberikan sinyal untuk membunyikan alarm dan mengaktifkan kontrol kipas sehingga kipas dapat bekerja menurunkan temperatur transformator.<em></em></strong></p><p><strong><em> </em></strong></p><p><strong><em>Kata kunci - </em></strong><em>transformator, rugi – rugi tembaga, temperatur, sistem kontrol, dial thermometer<strong>.</strong></em></p><p><strong><em> </em></strong></p><p><em>Abstract <strong>- </strong></em><strong>A transformer is an electrical device that is vital in the generation and transmission of electrical energy because the transformer can raise (stepping up) or lower (stepping down) the voltage. In the process of raising and lowering the voltage is usually often caused heat loss of copper in iron core and coil so that the overload condition will cause excessive warming and can affect the performance of the transformer. Therefore, a temperature control system on the transformer can control the temperature inside the transformer while working under overload conditions, so the transformer is not burned. Dial thermometer is used as a device that controls the temperature of the transformer in the temperature control system. In order to obtain an optimal control system, the temperature setting on the dial thermometer adjusted to the maximum transformer temperature can work. So that when a certain temperature dial thermometer can provide a signal to sound the alarm and activate the fan control so that the fan can work down the transformer temperature.</strong></p><p><strong> </strong></p><p><strong><em>Keywords -  </em></strong><em>transformator, loss of copper, themperature, control system, dial thermometer<strong></strong></em></p>

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