Heat Design of Multi-Functional Structure of Electronic Equipment with Material Properties in Control System

2012 ◽  
Vol 625 ◽  
pp. 159-166
Author(s):  
Jun Hui Wu ◽  
Quan Zhou ◽  
Qiang Zhou ◽  
Jie Chen ◽  
Hui Ping Si ◽  
...  
Keyword(s):  
Control System ◽  
Control Unit ◽  
Cooling Capacity ◽  
Thermal Design ◽  
Electronic Equipment ◽  
Functional Structure ◽  
Maximum Temperature ◽  
Thermal Coupling ◽  
Unit Structure ◽  
Fin Spacing

In this paper, the multifunctional structure was designed in electronic equipment of the control system, reducing the weight in the housings of the electronic equipment, wire and cable. The functions of thermal design and dynamic design and protection design were completed by using structure. The qualitative analysis of the center control unit structure model was done. Thermal analysis and the thermal design of the multifunctional electronic equipment structure were finished on the basis of the thermal design principles and attention of the matters. The cooling capacity was increased by fin structure with the cold plate. The modeling analyses of the same multi- functional structure with different fin spacing and height were completed in Icepak. The curves of the maximum temperature for the multi-functional structures corresponding to a group of fin height were got. The high-power MCM chip was placed in the middle of the multifunctional structure, and the remaining low-power chips were distributed around, which can reduce the thermal coupling of the chip, reducing the overall temperature of the multi-functional structure effectively, which has certain theoretical significance to the design of today’s electronic devices.

Chimney Effect on Natural Air Cooling of Electronic Equipment Under Inclination

2004 ◽  
Vol 126 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Yoji Kitamura ◽  
Masaru Ishizuka
Keyword(s):  
Thermal Behavior ◽  
Energy Savings ◽  
Acoustic Noise ◽  
Cooling Capacity ◽  
Low Noise ◽  
Thermal Design ◽  
Electronic Equipment ◽  
Air Cooling ◽  
Cooling Mode ◽  
Chimney Effect

With the rapid increase of the power dissipation density in modern electronic equipment, the cooling design of electronic equipment becomes increasingly important. For widely used forced-convection air-cooled systems, the reliability of and the acoustic noise of the fan present serious concerns as the air velocity is increased to enhance the cooling capacity. Thus, the interest in natural-convection air cooling is growing to take advantage of low noise and energy savings inherent in that cooling mode. One method of promoting the capacity of natural air cooling is to incline the electronics casing, thereby, induce draft air by what is called the chimney effect. However, the effect of inclination on thermal behavior and cooling capacity has not yet been fully understood due to the involvement of many parameters in driving the draft air. This paper presents the results of experimental and numerical studies on the effect of casing inclination on the temperature rise across the casing. The numerical simulation was implemented to find out the thermal behavior inside a thin electronic casing. The simulation results are in good agreement with the experiment data. A thermal design guide is obtained regarding how the cooling effect is improved by increasing the inclination angle.

A Study on the Effect of Inclination on Thermal Behaviors of Natural Convection Inside Thin Electronic Equipment Casing

2003 ◽  
Author(s):  
Masaru Ishizuka ◽  
Yoji Kitamura
Keyword(s):  
Natural Convection ◽  
Thermal Behavior ◽  
Acoustic Noise ◽  
Cooling Capacity ◽  
Low Noise ◽  
Thermal Design ◽  
Electronic Equipment ◽  
Air Cooling ◽  
Cooling Mode ◽  
Cooling Design

With rapid increase of the power dissipation density in modern electronic equipment, the cooling design of electronic equipment becomes increasingly important. For widely used forced-convection air-cooled systems, the reliability of and the acoustic noise of the fan present serious concerns as the air velocity is increased to enhance the cooling capacity. Thus, the interest in natural convection air-cooling is growing to take advantages of low noise and energy saving inherent in that cooling mode. One method of promoting the capacity of natural air-cooling is to incline the electronics casing, thereby, induce draft air by what is called the chimney effect. However, the effect of inclination on the thermal behavior and the cooling capacity has not yet been fully understood due to the involvement of many parameters in driving the draft air. This paper presents the results of experimental and numerical studies on the effect of casing inclination on the temperature rise across the casing. The numerical simulation was carried out to find the thermal behavior inside a thin electronic casing. The simulation results are in good agreement with the experimental data. A thermal design guide is obtained regarding how the cooling effect is improved by increasing the inclination angle.

DEVELOPMENT OF COMPUTERIZED MONITORING AND CONTROL SYSTEM OF THE MOBILE ROBOT’S POSITIONING ON LARGE FERROMAGNETIC SURFACES BASED ON INTELLIGENT TECHNIQUES. AUTOMATION OF THE MONITORING AND CONTROL PROCESSES OF MOBILE ROBOT FOR PROCESSING OF LARGE INCLINED SURFACES

2019 ◽  
pp. 41-48
Author(s):  
Yan Guojun ◽  
Oleksiy Kozlov ◽  
Oleksandr Gerasin ◽  
Galyna Kondratenko
Keyword(s):  
Control System ◽  
Mobile Robot ◽  
Functional Structure ◽  
Monitoring And Control ◽  
Technological Parameters ◽  
Monitoring And Control System ◽  
Inclined Surfaces ◽  
Computerized Monitoring ◽  
And Control ◽  
Tracked Mobile Robot

The article renders the special features of the design of a tracked mobile robot (MR) for moving over inclined ferromagnetic surfaces while performing specified technological operations. There is conducted a synthesis of the functional structure and selective technological parameters (such as control coordinates) of the computerized monitoring and control system (CMCS) intended for use with this MR. Application of the CMCS with the proposed functional structure allows substantially increasing the accuracy of the MR monitoring and control, which in turn provides for a considerable enhancement in the quality and economic efficiency of the operations on processing of large ferromagnetic surfaces.

DEVELOPMENT OF AN INTELLIGENT MACHINE FOR SORTING ANIMALS ACCORDING TO SPECIFIED CRITERIA

2020 ◽  
Vol 4 (41) ◽  
pp. 83-87
Author(s):  
ALEKSEY SEDOV ◽  
Keyword(s):  
Control System ◽  
Control Unit ◽  
Research Purpose ◽  
Identification System ◽  
Intelligent Machine ◽  
Modbus Protocol ◽  
Automatic Sorting ◽  
Animal Identification ◽  
Software Modules ◽  
Control And Management

The Federal scientific Agroengineering center VIM has developed technical tools, algorithms and software for the intelligent automatic control system for milking animals “Stimul” on the “Herringbone” milking unit in three versions. The created system does not include automatic selection gates for effective management of zootechnical and veterinary services of animals. (Research purpose) The research purpose is in developing an intelligent machine for automatic sorting of animals for servicing and managing the herd according to specified characteristics. (Materials and methods) The article presents the development of control and management systems in dairy farming based on the conceptual principles of digital transformation. The digital control system is based on a multifunctional panel controller. The created control unit has a port for connecting to the RS 485 network and provides support for network functions via the Modbus Protocol. The programming of the control unit has been made in the SMLogix tool environment, which supports the FBD function block language. (Results and discussion) The article presents an intelligent machine for automatic sorting of animal flows for servicing and managing the herd according to specified characteristics with the unification of hardware, software modules and interface. The article describes the necessary parameters for the automatic remote animal identification system, the basic component of the control system of an intelligent machine for sorting animals according to specified characteristics. (Conclusions) The machine allows to automatically identify, sort and send animals to the specified areas for individual service.

scholarly journals Evaporative Cooling Options for Building Air-Conditioning: A Comprehensive Study for Climatic Conditions of Multan (Pakistan)

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3061 ◽  
Author(s):  
Shazia Noor ◽  
Hadeed Ashraf ◽  
Muhammad Sultan ◽  
Zahid Mahmood Khan
Keyword(s):  
Thermal Comfort ◽  
Co2 Emissions ◽  
Air Conditioning ◽  
Evaporative Cooling ◽  
Cooling Capacity ◽  
Climatic Conditions ◽  
Maximum Temperature ◽  
Human Thermal Comfort ◽  
Work Input ◽  
System Configurations

This study provides comprehensive details of evaporative cooling options for building air-conditioning (AC) in Multan (Pakistan). Standalone evaporative cooling and standalone vapor compression AC (VCAC) systems are commonly used in Pakistan. Therefore, seven AC system configurations comprising of direct evaporative cooling (DEC), indirect evaporative cooling (IEC), VCAC, and their possible combinations, are explored for the climatic conditions of Multan. The study aims to explore the optimum AC system configuration for the building AC from the viewpoints of cooling capacity, system performance, energy consumption, and CO2 emissions. A simulation model was designed in DesignBuilder and simulated using EnergyPlus in order to optimize the applicability of the proposed systems. The standalone VCAC and hybrid IEC-VCAC & IEC-DEC-VCAC system configurations could achieve the desired human thermal comfort. The standalone DEC resulted in a maximum COP of 4.5, whereas, it was 2.1 in case of the hybrid IEC-DEC-VCAC system. The hybrid IEC-DEC-VCAC system achieved maximum temperature gradient (21 °C) and relatively less CO2 emissions as compared to standalone VCAC. In addition, it provided maximum cooling capacity (184 kW for work input of 100 kW), which is 85% higher than the standalone DEC system. Furthermore, it achieved neutral to slightly cool human thermal comfort i.e., 0 to −1 predicted mean vote and 30% of predicted percentage dissatisfied. Thus, the study concludes the hybrid IEC-DEC-VCAC as an optimum configuration for building AC in Multan.

Design of Bus Air-Conditioning Control System Based on PIC18F458

2013 ◽  
Vol 774-776 ◽  
pp. 407-410
Author(s):  
Qiu Hua Miao ◽  
Zhi Guang Guan
Keyword(s):  
Control System ◽  
Air Quality ◽  
Air Conditioning ◽  
Control Unit ◽  
Analog Signal ◽  
Conditioning Control

In this paper, a kind of efficient air-conditioning control system is proposed. PIC18F458 is adopted as main control unit of the system , which collects all kinds of analog singles such as temperature, humidity and so on, then convert them to digital by the A/D itself. After disposing and calculating each analog signal the system drives corresponding actuator to work to adjust temperature, humidity and cleanness of the air in bus, making passengers satisfied with air quality in bus.

scholarly journals Maintenance service technology and analysis of operation results of electronic equipment of AC electric locomotives on the railways of the Eastern operational area

2019 ◽  
Vol 78 (3) ◽  
pp. 169-176
Author(s):  
S. A. Boginskiy ◽  
V. V. Semchenko ◽  
N. G. Shabalin
Keyword(s):  
Control System ◽  
Electronic Equipment ◽  
Technical Diagnostics ◽  
Electric Locomotive ◽  
Microprocessor Control ◽  
Maintenance And Repair ◽  
Functional Scheme ◽  
Maintenance Service ◽  
Microprocessor Control System ◽  
Microprocessor Technology

The article presents the relevance of the topic associated with the introduction of technical diagnostics tools and the service system of electronic equipment for AC electric locomotives. Results of operating a microprocessor control system and diagnostics of AC electric locomotives on the Eastern operational area are presented in the form of failure statistics of elements of microprocessor technology. Structure of the technological process of servicing AC electric locomotives on the railways of the Eastern operational area is shown. Authors revealed features of building a system of locomotive maintenance points (LMP), which carry out repair and maintenance of electronic equipment for AC electric locomotives of various series. Functional scheme of the system for servicing electronic equipment for AC electric locomotives has been developed. Bench and technological equipment of the service area for the maintenance of electronic equipment is shown. The article describes development of an automated workplace (AWP) for optimization and repair of a microprocessor control system (MCS) for an electric locomotive, which was not previously in the locomotive sector. Examples of performing technological processes of repairing cassettes of MCS using AWP are given. The following conclusions were made: 1. Statistics of MCS failures and malfunctions of their cells on AC electric locomotives at the Eastern operational area for the period from 2016 to 2018 (LMP of station Tayshet and Karymskaya) shows that the number of failures of MCS decreased by 30 % and the number of malfunctioning MCS cells, received for repair, decreased by 45 %. 2. Automated workplaces created in the JSC “DTsV of the Krasnoyarskaya Railway” for optimizing and repairing the local government of AC electric locomotive made it possible to optimize repairs and create an automated process for the maintenance and repair of electronic equipment for electric locomotives. 3. Developed by specialists of the JSC “DTsV of the Krasnoyarskaya Railway” together with the employees of the LLC “Lokotech-Service” technological model of full service maintenance and repair of electronic equipment for AC electric locomotives on the railways of the Eastern operational area was implemented and well proved itself in the work of the LMP.

Temperature/Humidity Control System Based on Micro Controller Unit in the Room of Bikram's Yoga

2012 ◽  
Vol 529 ◽  
pp. 352-355
Author(s):  
Na Li ◽  
Yong Gang Tang ◽  
Gui Ying Wang
Keyword(s):  
Control System ◽  
Humidity Sensor ◽  
Control Unit ◽  
Data Display ◽  
Control Temperature ◽  
The Core ◽  
Wireless Transceiver ◽  
Remote System ◽  
And Control ◽  
Micro Controller Unit

This thesis has designed a temperature/humidity remote system which takes Micro controller Unit AT89S51 as the core control unit. The system consists of Micro controller Unit, SHT75 temperature/humidity sensor, Rok 101 007 wireless transceiver and PC data display modules. The system can detect and control temperature/humidity in the room of Bikram's yuga remotely to create an environment suitable for fitness in high temperature.

METHOD FOR IMPROVING THE ACCURACY OF MEASURING INPUT SIGNALS IN A MICROCONTROLLER CONTROL UNIT

2021 ◽  
pp. 82-86
Author(s):  
Р.Ю. Кузьменко ◽  
И.И. Таболин ◽  
А.О. Тищенко ◽  
А.Д. Данилов
Keyword(s):  
Total Error ◽  
Control Unit ◽  
Temperature Sensors ◽  
Temperature Error ◽  
Maximum Temperature ◽  
Practical Implementation ◽  
Analog To Digital Converter ◽  
Digital Converter ◽  
Analog To Digital ◽  
Software Compensation

Приводится методика программно-аппаратного способа компенсации теплового дрейфа напряжения, возникающего в измерительных каналах резистивных датчиков давления и температуры в блоке управления зарядно-разрядным устройством никель-водородной аккумуляторной батареи. Рассмотрена проблема повышения точности и надежности измерения контролируемых параметров для более точного управления режимами батареи в системе энергоснабжения при колебаниях температуры окружающей среды. Показана функциональная схема тракта преобразования аналогового сигнала в цифровую форму с использованием встроенного аналого-цифрового преобразователя микроконтроллера. Приведены экспериментальные данные исследований влияния температуры на точность измерения сигналов, а также графические иллюстрации максимальной приведенной погрешности 40 каналов измерения. Исследован разброс характеристик температурных датчиков, реализованных в кристаллах нескольких микроконтроллеров. На основании полученных данных выявлены узлы и элементы, вносящие максимальную температурную погрешность в каналы измерения датчиков давления и температуры аккумуляторной батареи. Разработана методика для программно-аппаратной компенсации температурной погрешности преобразования сигналов датчиков. Описаны алгоритм и условия практической реализации метода компенсации суммарной погрешности канала измерения с использованием аналого-цифрового преобразователя микроконтроллера. Проведена экспериментальная оценка примененного метода расчета в узле формирования телеметрии управления блока электроники, предназначенного для преобразования аналоговых сигналов с датчиков давления и температуры в цифровой код The article presents the method of hardware-software compensation of thermal voltage drift in the measuring channels of resistive pressure and temperature sensors in the control unit of the charging and discharging device of a nickel-hydrogen battery. We considered the problem of increasing the accuracy and reliability of the measurement of controlled parameters for more precise control of the operating modes of the batteries in the power supply system when the ambient temperature changes. We show the functional diagram of the path for converting an analog signal into a digital form using the built-in analog-to-digital converter of the microcontroller. We present experimental data on the influence of temperature on the accuracy of signal measurement, as well as graphic illustrations of the maximum reduced error of 40 measuring channels. We investigated the spread of the characteristics of temperature sensors implemented in the crystals of several microcontrollers. Based on the obtained data, we determined the nodes and elements that make up the maximum temperature error in the measurement channels of the pressure and temperature sensors of the battery. We developed a method of hardware-software compensation of the temperature error of the sensor signal conversion. Here we describe the algorithm and conditions of practical implementation of the method of compensation of the total error of the measuring channel using the analog-to-digital converter of the microcontroller. We carried out an experimental evaluation of the applied calculation method in the telemetry generation unit of the electronics unit designed to convert analog signals of pressure and temperature sensors into a digital code

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