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The Research on Automatic Heating System

Author: ZhangWenBin
Tutor: YaoYunPing
School: Lanzhou University of Technology
Course: Measuring Technology and Instruments
Keywords: MC9S12NE64 Metering heating CD4046 phase-locked loop In phase with difference frequency Fuzzy Adaptive PID
CLC: TU832
Type: Master's thesis
Year: 2011
Downloads: 84
Quote: 0
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Abstract

By comparing home and abroad heating development and related policies , our heating problem has three aspects : first billing methods unreasonable ; the second households adjust means backward ; the third resource utilization is low , serious waste . Based on the above three issues , the design of the measurement of heat meters , constant pressure heating and Ethernet-based data acquisition system . The intelligent heat metering and temperature regulation based on the MCS-8051 system is designed according to the principles of the heat metering . Digital temperature detection DS18B20 sensor to achieve single-chip temperature measurement , flow detection was designed based on the frequency difference method ultrasonic flow detector , heat measurement and thermal fees calculated and microcontroller connection , in order to achieve the charge on a calorie . The temperature adjustment section , by comparing the room temperature and set value , to adjust the degree of opening of the regulating valve , and to meet the needs of users heating . Indoor and outdoor thermal load changes , and user self- regulation and other factors and will therefore produce water imbalance design drag three frequency of water supply , inverter / power frequency power switching , there are many problems , the paper design phase synchronous switching CD4046 - based difference frequency circuit. At the same time to achieve the main chip / inverter switching -frequency design optocoupler switch automatically adjust the pump turned on or off according to the water supply pressure . The constant pressure water supply is a non-linear , higher order lag system using fuzzy adaptive PID control algorithm combining classical PID control with state-of-the-art expert system , to achieve the best control of the system . Take into account the safety and reliability and economy , this paper designed two control chip that master chip MC9S12NE64 and chip MCS -8051 from the control between the asynchronous serial communication interface converter uses RS - 485 to meet the communication requirements. MC9S12NE64 using Ethernet connection methods and management center , calorimetry charges . Designed to meet the chip to run and monitor capable of supporting the chip peripheral circuits , including power circuit design , external clock circuit , watchdog circuits , network interface circuits , pipe network hydraulic detection circuit and the ability to achieve real-time display of the LCD display circuit .

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CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Heating
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