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
This text introduces a kind of according to list slice machine control system of bus report station machine speech the electric circuit design， system mainly according to Ling Yang 16 single slice of machine SPCE061 A， match with a LED keyboard to show module and SPR at the same time 4096 carry out the function of the bus speech report This system mainly with SPCE061 A for the corpus design but become， SPR 4096 is the storage mold of this system piece， can store a great deal of speech contents， and pass AD and DA to convert completion to save or send out， finally provide a speech information for the SPCE061 As， the LED keyboard shows the module as the control mold of this system piece， it has stronger maneuverability the system， and make the control of system in brief clear， very easily start， SPCE061 As integrate the contact of of each mold piece and handle the correspondence of of each mold piece， it become one the system whole， and attain a design The system mainly uses C language in order to weave distance language， this system has stability Gao， function diversification and characteristics with strong function， M in present hands over there is extensive application in the
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
This paper mainly introduces the circuit design for bus station notifying based on SCM control This system based on Lingyang's 16-bit SCM -SPCE061A， together with LED keyboard display module， SPR_4096 module， realising the function for station This system is designed with SPCE061A as its key part， Being its memory module， SPR 4096 can restore mass of voice content， meanwhile， it can finally provide SPCE061A the voice information which was restored or sent through ADC，DAC As the control module of this system， LED keyboard display module enables the system a stronger operability and gives a concise system control and friendly SPCE061A integrates the relation among different modules and processes their communication and forms these modules into a microcosm that meets the design Programmed in C language， this system have the advantages of high stability， multivariate functions and practicability， thus has been widely used among bus system
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
