Data Acquisition System Submitted by: Harneet Singh Sushant Kumar Guide: Mr. Vinod Khera.

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Presentation transcript:

Data Acquisition System Submitted by: Harneet Singh Sushant Kumar Guide: Mr. Vinod Khera

Objective To sample real world data, process it and display on a LCD This Data Acquisition System works as a microcontroller-based digital thermometer for measuring the temperature. Displays fever if the temperature is more than 37 degrees.

Introduction Data Acquisition is the sampling of real world data Data that can be stored and processed DAQ includes appropriate sensors that convert any measurement parameter

START OF THE PROGRAM DECLARE VARIABLES, SET LCD PARAMETERS. SET PORTSFOR I/O INITIALIZE THE LCD AND DISPLAY LOGO.WAIT 60 SECONDS TO STABILISE INITIALISE DS18S21 READ DATA FROM DS18S21 AND CONVERT TO DISPLAY FORMAT IS TEMPERAT- URE > 37 DISPLAY FEVER ALONG WITH PRESENT TEMPERATURE DISPLAY NORMAL ALONG WITH PRESENT TEMPERATURE

Advantage of PIC16F84 What sets a microcontroller apart from other processors are special circuits to deal with the needs of real time applications.

PIC FEATURES Harvard architecture Improves bandwidth over traditional von Neumann architecture The PIC16FXX has a 13-bit program counter capable of addressing an 8K x 14 program memory space Watchdog timer RISC instruction set SOIC package

PIC16F84 Microcontroller

Pin Diagram

Dallas DS18S21

Pin configuration

DALLAS DS18S21 Direct-to-digital temperature sensor The output of the temperature sensor has 9-bit resolution The DS18S21 can function as a standalone thermostat with user-programmable trip-points or as 8-bit temperature sensor with a 1-Wire digital interface

DALLAS 18S21 operating temperature range of –55°C to +125°C Accurate to ±1°C over a range of 0°C to +85°C

Future Scope It can be programmed to work as a temperature alarm This system can be integrated with a notification service This will make this system a networked embedded system. The notification could be through (SMS)/

Conclusion The features make the Data Acquisition System a system of choice and a system of future, having unlimited scope for development and expansion

References Datasheet of PIC16F8X 6. Datasheet of DS18S21