This subject introduces a kind of nc dc voltage stabilizer， the power supply， by simulation showed circuit， control circuit and digital-to-analog circuit， amplifying circuit four parts， mainly is a set of singlechip intelligent dc power Accurate analog power is to provide power， digital chip， amplifiers， microcontroller is the voltage required by A/D sampling data output voltage， and comparison， if there is A deviation is the limit， adjust output signal output and closure， alarm， The working process of the working status， manostat by SCM outputs drive LED display， Display circuit used to display the size of the output voltage of While the digital technology and the simulation analysis of the concept of technical This topic is a kind of based on singlechip intelligent high-precision dc power supply of simple design， this power can use digital adjustment， the closed-loop real-time monitoring， high precision， and the output of both double overload protection and alarm functions， applicable to all have high accuracy requirements of the It compared with traditional manostat with easy operation， high stability of power and its output voltage size using digital display
Abstract Non-electrical signal to the sensor signals into the circuit a total follow-up measurement and analysis， measurement and control system is an indispensable component， it is the nature of various non-electrical signal conversion and signal mutual In the monitoring and control system， the quality and characteristics of the sensor affect the performance of the entire Temperature measurement in the area of negative temperature coefficient (NTC) thermistor in its response has been fast and wide measurement range， the advantages of cheap occupy certain market However， different series of thermistor resistance difference between the thermistor and the same series of individual differences seriously affect the actual use of the Subject to the single-chip microcomputer as the core design of AVR NTC temperature characteristics tester， in the design of high-precision temperature sensor PT100 thermal resistance of the heating environment in which real-time accurate measurement， the use of constant current source circuit as a sensor drive circuit， through the TLC2543 to be the temperature of high-speed data At the same time bridge the use of constant current source of the resistance of the thermistor measured the output signal through the bridge with the PGA-type △ ∑ A / D converter AD7705 is converted to digital From these single-chip temperature， the corresponding value recorded and the data sent through the serial port to the PC， in this way to measure the temperature characteristics of Key words: SCM; PT100; constant current source bridge; resistance measurement
Principles of Automatic Control allows the controlled object run scheduled the law no one directly involved in the Based on this idea， the automation of the system of the present design to maximize the realization by the sensor to control the In order to achieve the control of freedom pendulum-based tablet， the establishment of the tablet control system based on freedom This paper first analyzes to control rotation angle of the plate with free swing corner relations derived relation analysis given program on the control unit and feedback The control portion of the system as the core STC12C5A60S2 microcontroller (MCU)， the use of auxiliary chip stepper motor control (step motor) sensor data collected from the pendulum rod rotation and swing angle measured by high-precision angle sensor by stepper motor control tablet do the appropriate feedback to adjust the swing of the cycle， then prepared on the basis of existing devices control software debugging on a device， the final analysis of the accuracy of the system and the actual Keywords: SCM; freedom pendulum; tablet control; angle sensor; stepper motor 望采纳赞同 谢谢
Principle of automatic control can make the controlled object in no one directly involved in the case according to the scheduled law Based on this thought， this design realize the maximum system automation， through the sensor to control In order to realize the free pendulum based on the plate control， established based on free pendulum's flat control This paper firstly analyzes plate control Angle with the free pendulum Angle relationship， deduced relation， again to control unit， feedback unit carries on the analysis comparison given System control part to STC12C5A60S2 microcontroller as the core， USES from pendulum bar on the sensors to collect data to assist single-chip microcomputer control stepping motor rotation， realize the high precision of Angle sensor measure the swing Angle by stepping motor control plate in the periodic oscillation in the corresponding feedback adjustment， then on the basis of the existing devices formulate control software， on the equipment debugging， and finally to the precision of the system analysis and practical
Non-electrical signal to the sensor signals into the circuit a total follow-up measurement and analysis， measurement and control system is an indispensable component， it is the nature of various non-electrical signal conversion and signal mutual In the monitoring and control system， the quality and characteristics of the sensor affect the performance of the entire Temperature measurement in the area of negative temperature coefficient (NTC) thermistor in its response has been fast and wide measurement range， the advantages of cheap occupy certain market However， different series of thermistor resistance difference between the thermistor and the same series of individual differences seriously affect the actual use of the Subject to the single-chip microcomputer as the core design of AVR NTC temperature characteristics tester， in the design of high-precision temperature sensor PT100 thermal resistance of the heating environment in which real-time accurate measurement， the use of constant current source circuit as a sensor drive circuit， through the TLC2543 to be the temperature of high-speed data At the same time bridge the use of constant current source of the resistance of the thermistor measured the output signal through the bridge with the PGA-type △ ∑ A / D converter AD7705 is converted to digital From these single-chip temperature， the corresponding value recorded and the data sent through the serial port to the PC， in this way to measure the temperature characteristics of thermistor
有难度呀！！摘要：自动控制原理可以使被控对象在没有人直接参与的情况下按预定的规律运行。基于此思想，本设计最大限度的实现系统的自动化，通过传感器来对系统进行控制。为了实现对基于自由摆的平板的控制，建立基于自由摆的平板控制系统。本文首先分析平板的控制转角与自由摆转角的关系，推导出关系式，再对控制单元、反馈单元进行分析比较给出方案。Abstract:The principle of automatic control is that the controlled object can operate according to the predetermined pattern without direct manual Based on this concept， this design maximizes the realization of the system’s automation through the use of sensors to control the A relevant control system is set up to achieve the control of the free swing Firstly， this paper analyzes the relationship between the controlled rotation angle and the free swing rotation angle to deduce a relational expression， then by analyzing and comparing the control unit and feedback unit， a design scheme is 系统的控制部分以STC12C5A60S2单片机(MCU)为核心，利用从摆杆上的传感器采集的数据来辅助单片机控制步进电机(step motor)的转动，实现由高精度的角度传感器测量出摆动角度后由步进电机控制的平板在周期摆动中做相应反馈调整，然后在现有器件的基础上编制出控制软件，在设备上进行调试，最后对系统的精度进行分析并进行实际测量。STC12C5A60S2 MCU is the core of the system’s controlling parts; it helps the turning of the step motor which is controlled by MCU with the data collected from the sensor on the lever， and after the high precision angle sensor has measured the swing angle， as well as the step motor plate has made corresponding adjustment in the cycle swings， a control software based on the existing device is programmed and debugging is conducted on the equipment; finally an analysis is conducted on the precision of the system and actual measurement is carried 关键词：单片机；自由摆；平板控制；角度传感器；步进电机Key words: MCU; free swing; plate control; angle sensor; step motor 评论补充：如果翻译软件能达到这种顺畅水平，研发者将暴富了！ 【英语牛人团】
