Title: Design and implementation of controlled atmosphere chambers for cherry conservation
Authors: Eduardo Pires , Jaime Cavalheiro , José Cunha , Paulo Oliveira
Abstract: Controlled atmosphere storage is a technology that reduces the metabolic reactions of fruits and, when properly applied, helps to maintain their freshness and quality. This work describes the development and implementation of a system used to regulate four atmosphere controlled chambers for conservation of cherries, variety Saco. The data acquisition and control system uses a personal computer and a data acquisition card connected to sensors and actuators installed in the chambers. The software was developed using LabVIEW version 8.5 from National Instruments. The software has friendly interface to input and/or access data, such as: set the sampling interval and setpoints, among other variables. The user can specify different set-points for temperature and gas concentrations as programmable events along time. The actuating signals for cooling and gas concentration control are computed using incremental PID algorithms.
Publication date: 2012-07-16
Online entry date: 2013-05-08
Conference: CONTROLO’2012
Publication pdf: Click for full publication