- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 Ubiquitous Positioning, Indoor Navigation and Location-Based Services (UPINLBS) - Wuhan (2018.3.22-2018.3.23)] 2018 Ubiquitous Positioning, Indoor Navigation and Location-Based Services (UPINLBS) - Image Processing Based Indoor Localization System for Assisting Visually Impaired People
摘要： Indoor localization or indoor positioning system is a known as a process of detecting position of any object or people inside a building or room by different sensory data collected from different devices using different techniques such as radio waves, magnetic fields, acoustic signals or other procedures. However, lacking of a standard localization system is still a very big concern. Solution of this issue can be very beneficial for people in many cases but it can be especially very beneficial for the visually impaired people. In this paper, an image processing based indoor localization system has been developed using OpenCV and Python by following color detection technique to detect position of the user with maximum accuracy and then location of user is determined by analyzing that location matrix. Location accuracy depends on the size of the matrix and successful identification of target color. Firebase real time database was added to the system which made real time operations between server and the user end device easier. To justify the proposed model, successful experiments were conducted in indoor environments as well and correct result was achieved each time by detecting accurate locations. This will be very advantageous to observe the fully or partially sightless people and guide them towards their destination and also to inspect them for their security purpose.
关键词： Color Segmentation,Indoor localization,Image Processing,Indoor positioning system,Wireless communication,Connected object detection
更新于2025-09-23 15:23:52
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[IEEE 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) - Osaka, Japan (2019.10.15-2019.10.18)] 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) - An AC-Powered Smart LED Bulb for 3D Indoor Localization Using VLC
摘要： This paper demonstrates a smart LED bulb for indoor localization based on visible light communication (VLC) techniques, which is directly supplied with an AC power. It consists of two building blocks: a power management block and a control block. The power management block generates (30V and 5V) DC power supply for the LEDs and the control block, respectively, from the AC power. The control block modulates the light intensity of the LEDs via an NMOS switch to transmit pre-defined localization data patterns. Finally, the transmitted VLC signal is detected with a mobile phone camera.
关键词： Smart LED Bulb,AC Power Supply,Indoor Localization,VLC
更新于2025-09-23 15:21:01
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[IEEE IEEE INFOCOM 2018 - IEEE Conference on Computer Communications - Honolulu, HI, USA (2018.4.16-2018.4.19)] IEEE INFOCOM 2018 - IEEE Conference on Computer Communications - RETRO: Retroreflector Based Visible Light Indoor Localization for Real-time Tracking of IoT Devices
摘要： Indoor localization is very important to enable Internet-of-things (IoT) applications. Visible light communication (VLC)-based indoor localization approaches enjoy many advantages, such as utilization of existing ubiquitous lighting infrastructure, high location and orientation accuracy, and no interruption to RF-based devices. However, existing VLC-based localization methods lack a real-time backward channel from the device to landmarks and necessitate computation at the device, which make them unsuitable for real-time tracking of small IoT devices. In this paper, we propose and prototype a retroreflector-based visible light localization system (RETRO), that establishes an almost zero-delay backward channel using a retroreflector to reflect light back to its source. RETRO localizes passive IoT devices without requiring computation and heavy sensing (e.g., camera) at the devices. Multiple photodiodes landmarks) are mounted on any single unmodified light source to sense the retroreflected optical signal (i.e., location signature). We theoretically derive a closed-form expression for the reflected optical power related to the location and orientation of the retroreflector, and validate the theory by experiments. The characterization of received optical power is applied to a received signal strength indicator and trilateration based localization algorithm. Extensive experiments demonstrate centimeter-level location accuracy and single-digit angular error.
关键词： Indoor localization,visible light,retroreflector
更新于2025-09-23 15:21:01
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Injection Dependent Lifetime Spectroscopy for Two-Level Defects in Silicon
摘要： In this letter, a new single-anchor indoor localization concept employing electronically steerable parasitic array radiator (ESPAR) antenna has been proposed. The new concept uses a simple ?ngerprinting algorithm adopted to work with directional main beam and narrow minimum radiation patterns of ESPAR antenna that scans 360 area around the base station, while the signal strength received from a mobile terminal is being recorded for each con?guration. The letter describes the antenna design and necessary ?ngerprinting algorithm expansion and shows measurements of the proof-of-concept prototype performed within the experimental setup. Localization results obtained from indoor measurements indicate that the proposed concept can provide better results than the similar approach based on a switched-beam antenna introduced by Giorgetti et al. (IEEE Commun. Lett., vol. 13, no. 1, pp. 58–60, Jan. 2009).
关键词： switched-beam antenna,Electronically steerable parasitic array radiator (ESPAR) antenna,indoor localization,?ngerprinting,smart antenna,wireless positioning system
更新于2025-09-23 15:19:57
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[IEEE 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Palermo (2018.9.10-2018.9.13)] 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Hybrid Observer for Indoor Localization with Random Time-of-Arrival Measurments
摘要： In this work an indoor position estimation algorithm will be proposed. The position will be measured by means of a sensor network composed by fixed beacons placed on the indoor environment and a mobile beacon mounted on the object to be tracked. The mobile beacon communicates with all the fixed beacons by means of ultra wide-band signals, and the distance between them is computed by means of time of flight techniques. Moreover, inertial measurements will be used when the position measurements are not available. Two main problems will be considered in the proposed architecture: the fact that the beacons work with a lower update rate than the IMU, and that the mobile beacon can comunicate with only one fixed beacon at a time. Experimental results will be shown in order to validate the effectiveness of the proposed technique.
关键词： sampled measurements,indoor localization,Hybrid observer
更新于2025-09-19 17:15:36
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Optimization of Back Reflectors for Bifacial Photovoltaic Modules
摘要： In this letter, a new single-anchor indoor localization concept employing electronically steerable parasitic array radiator (ESPAR) antenna has been proposed. The new concept uses a simple ?ngerprinting algorithm adopted to work with directional main beam and narrow minimum radiation patterns of ESPAR antenna that scans 360 area around the base station, while the signal strength received from a mobile terminal is being recorded for each con?guration. The letter describes the antenna design and necessary ?ngerprinting algorithm expansion and shows measurements of the proof-of-concept prototype performed within the experimental setup. Localization results obtained from indoor measurements indicate that the proposed concept can provide better results than the similar approach based on a switched-beam antenna introduced by Giorgetti et al. (IEEE Commun. Lett., vol. 13, no. 1, pp. 58–60, Jan. 2009).
关键词： indoor localization,wireless positioning system,smart antenna,switched-beam antenna,?ngerprinting,Electronically steerable parasitic array radiator (ESPAR) antenna
更新于2025-09-19 17:13:59
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[IEEE 2019 Workshop on Recent Advances in Photonics (WRAP) - Guwahati, India (2019.12.13-2019.12.14)] 2019 Workshop on Recent Advances in Photonics (WRAP) - Visible Wavelength Photonic Integrated Circuit in Silicon Nitride Platform for On-Chip Sensing Applications
摘要： In this letter, a new single-anchor indoor localization concept employing electronically steerable parasitic array radiator (ESPAR) antenna has been proposed. The new concept uses a simple ?ngerprinting algorithm adopted to work with directional main beam and narrow minimum radiation patterns of ESPAR antenna that scans 360 area around the base station, while the signal strength received from a mobile terminal is being recorded for each con?guration. The letter describes the antenna design and necessary ?ngerprinting algorithm expansion and shows measurements of the proof-of-concept prototype performed within the experimental setup. Localization results obtained from indoor measurements indicate that the proposed concept can provide better results than the similar approach based on a switched-beam antenna introduced by Giorgetti et al. (IEEE Commun. Lett., vol. 13, no. 1, pp. 58–60, Jan. 2009).
关键词： indoor localization,wireless positioning system,smart antenna,switched-beam antenna,?ngerprinting,Electronically steerable parasitic array radiator (ESPAR) antenna
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) - Newark, NJ, USA (2019.11.11-2019.11.14)] 2019 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) - EyeLoc: Smartphone Vision Enabled Plug-n-play Indoor Localization in Large Shopping Malls
摘要： Indoor localization is an emerging demand in many large shopping malls. Existing indoor localization systems, however, require exhausted system bootstrap and calibration phases. The huge sunk cost usually hinders practical deployment of the indoor localization systems in large shopping malls. In contrast, we observe that ?oor-plan images of large shopping malls, which highlight the positions of many shops, are widely available in Google Maps, Gaode Maps, Baidu Maps etc. According to several observed shops, people can localize themselves (self-localization). However, due to the requirements of geometric sense and space transformation, not all people get used to this way. In this paper, we propose EyeLoc, which uses smartphone vision to enable accurate self-localization on ?oor-plan images. EyeLoc addresses several challenges which include developing ubiquitous smartphone vision system, ef?cient vision clue extraction and robust measurement error mitigation. We implement EyeLoc in Android and evaluate its performance in emulated environment and four large shopping malls. The 90-percentile errors of localization and heading direction are 4m and 20? in the two large shopping malls.
关键词： text detection/recognition,inertial measurement,smartphone vision system,Indoor localization
更新于2025-09-12 10:27:22
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[IEEE 2018 IEEE Seventh International Conference on Communications and Electronics (ICCE) - Hue (2018.7.18-2018.7.20)] 2018 IEEE Seventh International Conference on Communications and Electronics (ICCE) - Beamsteering Phased Array Antenna using a Full 360° and Programmable Continuous Phase Shifter for Indoor Localization
摘要： This paper presents a design of phased array antenna using a full 360o and programmable continuous phase shifter based on angle of arrival techniques of indoor localization. This antenna system allows to electrically steer main beam direction smoothly, so the number of beams is independent of the number of antenna elements as previous research, and resolution for indoor localization system is improved. Antenna elements are fed through parallel feed network including Wilkinson power dividers and full 360o, continuous phase shifters. Radiation patterns, experimented from -45o to 45o in an anechoic chamber, show that the main beam direction is quite close to the desired direction in simulation, and the side lobe level is less than main beam about 10dB.
关键词： wilkinson power divider,reflection type phase shifter,array antenna,Indoor localization,patch antenna
更新于2025-09-10 09:29:36
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[IEEE 2018 IEEE Intelligent Vehicles Symposium (IV) - Changshu (2018.6.26-2018.6.30)] 2018 IEEE Intelligent Vehicles Symposium (IV) - Vision-based Semantic Mapping and Localization for Autonomous Indoor Parking
摘要： In this paper, we proposed a novel and practical solution for the real-time indoor localization of autonomous driving in parking lots. High-level landmarks, the parking slots, are extracted and enriched with labels to avoid the aliasing of low-level visual features. We then proposed a robust method for detecting incorrect data associations between parking slots and further extended the optimization framework by dynamically eliminating suboptimal data associations. Visual fiducial markers are introduced to improve the overall precision. As a result, a semantic map of the parking lot can be established fully automatically and robustly. We experimented the performance of real-time localization based on the map using our autonomous driving platform TiEV, and the average accuracy of 0.3m track tracing can be achieved at a speed of 10kph.
关键词： parking slots,autonomous driving,indoor localization,visual fiducial markers,semantic mapping
更新于2025-09-10 09:29:36