fa موقعیت‌یابی سه‌بُعدی یک هدف ناشناخته با استفاده از دو حس‌گر نامتجانس مقالات پردازش داده‌های رقمی Paper پژوهشي Research <div style="text-align: justify;"><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">در شبکه</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">های حس‌گرغیر‌همگن، برای موقعیت</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">یابی هدف از چندین نوع گیرنده استفاده می</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">شود و هر گیرنده می</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">تواند کمیت متفاوتی از هدف را اندازه</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">گیری کند. استفاده از چندین کمیت اندازه</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">گیری‌شده از یک هدف باعث می</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">‌شود که تخمین موقعیت آن با سادگی و دقت بیشتری انجام شود. در اینجا، موقعیت</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">یابی هدف در یک فضای سه‌بُعدی با استفاده از یک شبکه غیر‌همگن شامل یک حس‌گر همه‌جهته و یک حس‌گر برداری مورد نظر است. الگوریتم موجود برای چنین شبکه</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ای، به موقعیت نسبی هدف و حس‌گرها وابسته بوده و در پنجاه درصد موارد نمی‌تواند جوابی برای فاصله هدف ارایه کند. در الگوریتم پیشنهادی در این مقاله برای به‌دست‌آوردن یک تخمین بدون ابهام از فاصله هدف در هندسه مورد نظر، تنها از توان</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">های اندازه</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">گیری‌شده در دو حس‌گر استفاده می</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">‌شود. در این راستا، ابتدا یک تحلیل تئوری از مسأله انجام گرفته و سپس به‌منظور یافتن فاصله هدف یک الگوریتم جست</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">وجوی ساده و مؤثر مبتنی بر روش ریشه</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">یابی تصنیف پیشنهاد می</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">‌شود</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">. در الگوریتم ارایه‌شده، دست‌یابی به یک تخمین یکتا از فاصله هدف مستقل از موقعیت مکانی آن تضمین می</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">‌شود. شبیه</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">سازی</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">های انجام‌شده، سرعت و دقت الگوریتم ارایه‌شده و همچنین مقاوم‌بودن آن در برابر تغییرات فاصله هدف و موقعیت</span></span></span></strong><span style="color:black;"><span style="font-family:B Nazanin;">&shy;</span></span><strong><span style="color:black;"><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">های مختلف دو حس‌گر را اثبات می‌کند.</span></span></span></strong></div> <div style="text-align: justify;"><strong>Heterogeneous wireless sensor networks consist of some different types of sensor nodes deployed in a particular area. Different sensor types can measure different quantity of a source and using the combination of different measurement techniques, the minimum number of necessary sensors is reduced in localization problems. In this paper, we focus on the single source localization in a heterogeneous sensor network containing two types of passive anchor-nodes: Omni<s>-</s>directional and vector sensors. An omni-directional sensor can simply measure the received signal strength (RSS) without any additional hardware. In other side, an acoustic vector sensor (AVS) consists of a velocity-sensor triad and an optional acoustic pressure-sensor, all spatially collocated in a point-like geometry. The velocity-sensor triad has an intrinsic ability in direction finding process. Moreover, despite its directivity, a velocity-sensor triad can isotropically measure the received signal strength and has a potential to be used in RSS-based ranging methods.</strong><br> <strong>Employing a heterogeneous sensor-pair consisting of one vector and one omni<s>-</s>directional sensor, this study tries to obtain unambiguity estimation for the location of an unknown source in a three-dimensional (3D) space. Using a velocity-sensor triad as an AVS, it is possible to determine the direction of arrival (DOA) of the source without any restriction on the spectrum of the emitted signal. However, the range estimation is a challenging problem when the target is closer to the omnidirectional sensor than the vector sensor. The existence method proposed for such configuration suffers from a fundamental limitation, namely the localization coverage. Indeed, this algorithm cannot provide an estimate for the target range in 50 percent of target locations due to its dependency to the relative sensor-target geometry. </strong><br> <strong>In general, our proposed method for the considered problem can be summarized as follows: Initially, we assume that the target&#39;s DOA is estimated using the velocity-sensor triad&rsquo;s data. Then, considering the estimated DOA and employing the RSS measured by two sensors, we propose a computationally efficient algorithm for uniquely estimation of the target range. To this end, the ratio of RSS measured by two sensors is defined and, then, shown that this power ratio can be expressed as a monotonic function of the target range. Finally, the bisection search method is proposed to find an estimate for the target range. Since the proposed algorithm is based on bisection search method, a solution for the range of the target independent of its location is guaranteed. Moreover, a set of future aspects and trends is identified that might be interesting for future research in this area. Having a low computational complexity, the proposed method can enhance the coverage area mostly two times of that explored by the existence method. The simulated data confirms the speed and accuracy of developed algorithm and shows its robustness against various target ranges and different sensor spacing.</strong></div> شبکه غیر همگن, موقعیت‌یابی بدون ابهام, حس‌گر برداری, شدت سیگنال دریافتی, الگوریتم تصنیف Heterogeneous network, Unambiguous localization, Vector sensor, RSS, Bisection algorithm 147 158 http://jsdp.rcisp.ac.ir/browse.php?a_code=A-10-1509-1&slc_lang=fa&sid=1 Vali kavoosi ولی کاوسی kavoosi@miau.ac.ir 10031947532846008802 10031947532846008802 No Islamic Azad University, Marvdasht branch دانشگاه آزاد اسلامی، واحد مرودشت mohammad javad Dehghani محمد جواد دهقانی dehghani@sutech.ac.ir 10031947532846008803 10031947532846008803 Yes Shiraz University of Technology دانشگاه صنعتی شیراز و مرکزمنطقه‌ای اطلاع‌رسانی علوم وفنآوری، شیراز Reza Javidan رضا جاویدان reza.Javidan@gmail.com 10031947532846008804 10031947532846008804 No Shiraz University of Technology دانشکده مهندسی کامپیوتر و فناوری اطلاعات، دانشگاه صنعتی شیراز