Microcomputer-based Data Acquisition System for the Measurements of Temperature and Weight in Food Processing

마이크로 컴퓨터를 이용한 식품가공(食品加工) 공정중(工程中)의 온도및 무게 측정용(測定用) Analog-digital 변환(變換)및 접속(接續) 시스템의 제작(製作)

  • Choi, Boo-Dol (Department of Food Science and Technology, College of Agriculture, Seoul National University) ;
  • Chun, Jae-Kun (Department of Food Science and Technology, College of Agriculture, Seoul National University)
  • 최부돌 (서울대학교 농과대학 식품공학과) ;
  • 전재근 (서울대학교 농과대학 식품공학과)
  • Published : 1987.04.01

Abstract

To develop a microcomputer-based data acquisition system for measurement of variables such as temperature and weight in food process, a low-cost data acquisition system was developed using an Apple II microcomputer. The system consisted of a microcomputer, a temperature sensor made of pt-100, a strain gauge load cell for weighing, a preamplifier for signal conditionings and an interface device. Interface device was built with programmable interface chip MC 6821, tristate buffer 74244 and analog-to-digital converter ADC 0809. The analog signals of temperature and weight were serially acquisited upon the program. The BASIC language was used for operating the data acquisition and data handling programs. The system successfully measured the variables such as temperature and weight with various sampling intervals in food dehydration process.

Keywords