Three-Dimensional Indoor Visible Light Positioning with a Tilt Receiver and a High Efficient LED-ID

Xu, Haixin; An, Futong; Wen, Shangsheng; Yan, Zihong; Guan, Weipeng

doi:10.3390/electronics10111265

Cited by 7 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the relationship between the LED power supply voltage and current is not linear. In addition, the supply current and voltage values determine the LED temperature and efficiency [7][8][9][10]. Therefore, it is very important to improve not only the LED light itself, but also its control, which influences the efficiency, color, temperature, frequency, etc.…”

Section: Introductionmentioning

confidence: 99%

Investigation of an LED Strip Controller Based on a PWM Driver and a PIC Series Microcontroller

Kavaliauskas,

Šajev,

Blažiūnas

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

This research paper investigates an LED strip lighting system, whose LED lighting controller was developed based on the PIC24FV32KA302 microcontroller and PCA9685 PWM driver. During the study, various parameters of the system were evaluated, including the response time from the length of commands, the dependence of the PWM signal characteristics on the logic values generated by the microcontroller, and the dependence of the LED light flux and power on the percentage of the PWM signal and the power of the power supply channels. The results of the study revealed that the reaction time depended on the length of the sent command, where as the logic values of the microcontroller were changed from 1000 to 4000, the size of the PWM signal changed from 25 to 100%. The use of the I2C communication protocol, which is a master–slave architecture and uses data and synchronization lines, was also found to affect response times. When the percentage of the PWM signal was changed from 10 to 100%, the light flux of the LED strip changed from 100 to 1000 lm. These results reflect the advantages of applying microcontrollers and PWM drivers to LED control systems, emphasizing their flexibility, efficiency, and precise light control.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation of an LED Strip Controller Based on a PWM Driver and a PIC Series Microcontroller

Kavaliauskas,

Šajev,

Blažiūnas

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…These methods assume that the receiver and transmitter are parallel to each other. However, the receiver is prone to tilt due to environmental disturbances, which reduces the accuracy of the positioning algorithm [8]. Therefore, many positioning algorithms for the tilted receiver have been studied.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Positioning Algorithm for Tilted Receiver Using RSS and TDOA with Gaussian Process

Zuo

Wang

et al. 2023

Photonics

View full text Add to dashboard Cite

In the visible light positioning (VLP) system, the received signal strength (RSS) algorithm has a better signal noise ratio performance than the time difference of arrival (TDOA) algorithm, while the RSS algorithm needs to work under the condition that the transmitter and receiver are strictly parallel. However, the receiver is prone to tilt due to environmental disturbances, which reduces the accuracy of the RSS algorithm. For the tilted receiver, the TDOA algorithm has a higher positioning accuracy than the RSS algorithm. In order to take full advantage of the two algorithms, we propose a hybrid positioning algorithm to locate the tilted receiver by using a Gaussian process (GP). The scheme separately uses RSS and the distance difference as the inputs of the GP model to estimate the position of the receiver. Then, according to the proposed positioning selection strategy, the more credible estimated position in our opinion is selected as the final estimated position. In addition, RSS information in the hybrid algorithm is extracted from the TDOA signal, which allows the hybrid algorithm to prevent an increase in the complexity of the VLP system. During the training and testing, RSS is normalized to meet the order-of-magnitude requirements of the GP model on the input data. Simulation results validate the hybrid algorithm based on a two-dimensional positioning system for the tilted receiver. When the standard deviations of the azimuth angle and elevation angle are 1°, the positioning accuracy of the hybrid algorithm is 53.7% higher than that of the RSS algorithm using an artificial neural network, and 49.9% higher than that of the RSS algorithm using a GP. The localization error under 1° standard deviations of azimuth and elevation angles is 20.2% lower than that under 20° standard deviations of the two angles.

show abstract

“…Positioning systems can use 2D [ 12 ] or 3D [ 13 ] models. The latter has a higher positioning accuracy but requires higher costs due to the hardware infrastructure.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Indoor Localization System for Human Activity Recognition (HAR) in Healthcare

Bibbò

Carotenuto

Corte

2022

Sensors

View full text Add to dashboard Cite

The number of older people needing healthcare is a growing global phenomenon. The assistance in long-term care comprises a complex of medical, nursing, rehabilitation, and social assistance services. The cost is substantial, but technology can help reduce spending by ensuring efficient health services and improving the quality of life. Advances in artificial intelligence, wireless communication systems, and nanotechnology allow the creation of intelligent home care systems avoiding hospitalization with evident cost containment. They are capable of ensuring functions of recognition of activities, monitoring of vital functions, and tracking. However, it is essential to also have information on location in order to be able to promptly intervene in case of unforeseen events or assist people in carrying out activities in order to avoid incorrect behavior. In addition, the automatic detection of physical activities performed by human subjects is identified as human activity recognition (HAR). This work presents an overview of the positioning system as part of an integrated HAR system. Lastly, this study contains each technology’s concepts, features, accuracy, advantages, and limitations. With this work, we want to highlight the relationship between HAR and the indoor positioning system (IPS), which is poorly documented in the literature.

show abstract

Three-Dimensional Indoor Visible Light Positioning with a Tilt Receiver and a High Efficient LED-ID

Cited by 7 publications

References 21 publications

Investigation of an LED Strip Controller Based on a PWM Driver and a PIC Series Microcontroller

Investigation of an LED Strip Controller Based on a PWM Driver and a PIC Series Microcontroller

Hybrid Positioning Algorithm for Tilted Receiver Using RSS and TDOA with Gaussian Process

An Overview of Indoor Localization System for Human Activity Recognition (HAR) in Healthcare

Contact Info

Product

Resources

About