Wireless Gas Detector Essay
DESIGNING WIRELESS GAS DETECTION AND MONITORING SYSTEMS Prof Dr Dogan Ibrahim of the Near East University in Cyprus describes the basic principles of gas sensors and shows how a wireless gas sensor system can be designed INTRODUCTION Gas detector systems are mainly used to sense the presence of gas leak in an area and then take some action, such as automatically shut down the source of the gas, or sound an alarm to inform the people in the area where the gas leak is occurring. Common gas detectors used at homes sense potentially hazardous gas leaks such as the carbon monoxide and then sound an alarm to alert the people at home that hazardous gas has been detected so that doors and windows can be opened, the source of the gas can be shut if possible, and people are alerted early enough so that they can leave the area. There are many life threating toxic …show more content…
The system described here is multi-node and is therefore suitable for use in places like caravan sites, holiday homes, students’ halls of residence, old peoples’ homes, university campus, and other places where groups of people live and large number of detectors may be required. The block diagram of the designed system is shown in Figure 2. The system consists of two parts: gas detection stations, and gas monitoring station. A gas detection station consists of a semiconductor gas sensor, a microcontroller that receives signals from the gas sensor and activates a suitable transmitter module to send a message to the monitoring station together with the unique ID of the station to alert that gas leakage has been detected at the specified station. Appropriate action is then taken at the monitoring station such as sounding an alarm and attending the requesting station for help. In this design up to 16 stations can be used in the system with their unique IDs selected with switches and ranging from 0 to
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