Broadband Environmental Surveillance Network
3. Performance Testing and Evaluation
n order to evaluate the electrical properties of the constructed environmental surveillance system, several experimental investigations and testing were performed. These include the testing of designed antenna system, electronic instrumentation circuits, the data transmission quality through the hybrid transmission media i.e. optical fiber cable and wireless link and many others. Figure shows antenna system performance, both for the simulated model and the fabricated one. The antenna is a monopole wire antenna intended to apply in the frequency operation band lied from about Mz up to Mz. t is clearly seen that the constructed antenna allow the wide bandwidth for the data transmission from the sensor array module and transmitter to the central monitoring unit. The available impedance bandwidth of approximately larger than Mz is possible to be achieved in the practical situation, even though the numerical computation shown a relatively big different performance in terms of the impedance bandwidth provided approximately Mz . The experimental testing to evaluate the data transmission quality through the hybrid transmission media i.e. optical fiber cable and wireless link and to study the electrical properties of the constructed environmental surveillance system have been performed for several times. owever, in this conference manuscript the results of the experiment to assess the quality of TS environmental data transmission over the wireless link will be dominantly discussed and only little part presenting the whole a a b Measured Simulated Frequency MHz Frequency MHz testing transmission over the optical fiber cable. Table tabulates several testing results to characterize the performance of TS datainformation transmission via . Mz frequency band communication link. The experiment was set‐up in such a way to study of how the actual sensed data collected through the environmental sensors array module could be transmitted from various distances or different locations along the highway network. Table Transmitting data using FM Creator . Mz transmitter on the situation no vehicles in the nearby location Distance km Time Transmitted Data Received Data Receiver Vout V Air Quality Category K RH T o C CO PPM K RH T o C CO PPM : 8 8 . Good : 8 8 . Good : 8 8 . Good : . Good : 8 . Good : 8 8 . Good : 8 8 .8 Good : 8 8 .8 Good : 8 8 .8 Good : 8 8 . Good : 8 8 . Good : 8 . Good : 8 8 8 . 8 Good : 8 8 . 8 Good : 8 8 . 8 Good It is obviously known based on the above table that the whole constructed environmental surveillance system has performed in the very accurate manner during the mobile testing measured from several locations. The communication range between the local sensor array transceiver module and the centre monitoring and processing unit located at Universitas Hasanuddin campus, Tamalanrea Makassar is no more than 5 Km. Outside the area the communication quality was very poor and in the crucial condition it was disconnected. The measured ITS data described in Table I could be further processed for the purpose of analytical assessment regarding the data transmission characteristic in several parts of the entire ITS network and the results are plotted in Figures 3, 4, 5, 6 and 7.Parts
» Broadband Environmental Surveillance Network
» Performance Testing and Evaluation
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