نوع مقاله : یادداشت فنی
نویسندگان
1 دانشکده ی برق و کامپیوتر - دانشگاه حکیم سبزواری
2 گروه برق، واحد مشهد، دانشگاه آزاد اسلامی نیشابور، مشهد، ایران
3 گروه برق ، واحد مشهد، دانشگاه آزاد اسلامی نیشابور، مشهد، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Many approaches are used to monitor landslides. The detection techniques vary depending on the distance between the area of interest (AOI) and receiving devices.In this paper, a technique for predicting and monitoring the landslides in steep areas in the foothills or mountain range, using wireless sensor networks, was introduced, analyzed and simulated. The proposed landslide monitoring system relies on placing an array of wireless sensor nodes as transmitters array, especially in the steep areas, and receiving and analyzing the signals received from the array by two synchronous wireless receiver nodes.In fact, the proposed system for monitoring the phenomenon ``landslide'' measures the changes of the phase difference between the two wireless sync receiver nodes, before and after the occurrence of landslides. In addition to the acceptable accuracy and reliability of the proposed monitoring system taken into consideration, it also has acceptable qualification for monitoring the slope foothills in limited areas under critical conditions.In this study, No \u{fb01}eld test was tried, but there is a complete simulation example to illustrate the technique using an array of six transmitters and two receivers. The accuracy of the results is carefully reviewed and placed on evaluation.In this paper, an inexpensive and low noise displacement change detection technique based on the phase difference between two coherently demodulated receiving signals is presented. It measures the phase difference of the range between the transmitter (or target) in the AOI and two wireless sync receiver nodes. The area of interest (AOI) refers to the surface area of a sloped hillside, and the receiving devices are at some distance away from the foothill. The transmitter array is either hardwired or programmed to transmit signals in a coordinated sequence. The two receivers are set apart at small distances and demodulate the receiving signals independently, yet coherently. It can detect the early landslide for small, but critical areas, with ranges up to 250 m when popular IEEE 802.11n family devices are used.
کلیدواژه‌ها [English]
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