Telemonitoring Temperature and Humidity at Bio-energy Process using Smart Phones
Abstract: Bio-energy from
biogas can be produced through anaerobic digestion of either organic solid waste
or wastewater. Energy production process in the digester is however sometimes
hard to be monitored due to manual measurement, otherwise it needs a high
technology requiring a high cost budget. This paper presents a low cost
technology to monitor the process by using Android based smart phones which can
easily be integrated in human daily activity. A program was built by using
Eclipse in order to give send/receive command to/from the hardware and display
the measurement data on the registered smart phones. The measurement controller
was put at the anaerobic digester to record temperature and Relative Humidity
(RH) data to memory card and to transmit the data to smart phones. In the
experiment with 20 data samples, mean errors were repectively -0.317 oC, 0.932
oC, and 1,378 % for temperature sensor LM35, and temperature and RH sensor
using SHT11. Mean squared error for LM35 was 0.373 oC and for SHT11 was 1.117
oC and 2.629 % for temperature and RH respectively. The system has been also implemented
in the real anaerobic digester. Electrical energy consumption was 0.623 Wh with
30 minutes cycle time and one minute sampling time.
Author: Seno D Panjaitan
Journal Code: jptkomputergg160283
