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Arrival angle estimator-based light source position estimation system and estimation method

A light source position and estimator technology, applied to radio wave measurement systems, direction/deviation determination electromagnetic systems, instruments, etc., can solve time-consuming and labor-intensive problems, and achieve the effect of low cost and fast speed

Pending Publication Date: 2021-06-08
SOUTHEAST UNIV
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Problems solved by technology

But this method needs to aim the light of the laser rangefinder at the target, and when the number of targets to be measured is large, this method will become time-consuming and laborious

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  • Arrival angle estimator-based light source position estimation system and estimation method
  • Arrival angle estimator-based light source position estimation system and estimation method
  • Arrival angle estimator-based light source position estimation system and estimation method

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Embodiment Construction

[0031] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.

[0032] The light source position estimation system based on the angle-of-arrival estimator of the present invention uses K angle-of-arrival estimators to determine the incident direction of the optical signal. , photomultiplier tube array, such as figure 1 , figure 2 shown. figure 1 vector v in k Indicates the normal vector of the kth photodiode (PD), r represents the direction of the light source, figure 2 where L represents the light source, O' represents the center of the lens, x'y' is the plane where the lens is located, z' is the direction of the normal vector of the lens, Q is the projection of L on the x'y' plane, θ' is the incident direction angle, and P is The imaging point of the light source on the sensor array, O c is the projection point of the lens center on the sensor array, T is the paral...

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Abstract

The invention discloses a light source positioning method based on a plurality of arrival angle estimators. The light source positioning method comprises the steps of receiving a light source signal, designing the structure of the arrival angle estimators and processing the received signal. Each arrival angle estimator is composed of a plurality of photodiodes with different normal directions, the incoming direction of light can be estimated by using the difference of light signals received by the different photodiodes, and a certain target is positioned by receiving signals of a plurality of light sources with known positions in a traditional light positioning scheme. However, the known hypothesis of the light source position is not established in some cases. Therefore, in the indoor scene, the light source can be quickly positioned by using the angle-of-arrival estimator mentioned above. The method can form effective complementation with a traditional light positioning scheme, and compared with a traditional position measurement method such as a laser range finder, the scheme is simple and efficient.

Description

technical field [0001] The invention relates to the technical field of wireless optical positioning, in particular to a positioning system using an angle of arrival estimation method. Background technique [0002] The traditional wireless light positioning algorithm assumes that the coordinates of the light source are known, and then locates by the measured value of the receiver and the coordinates of the light source. The light source positions are stored in a light source position database. However, in the actual environment, the coordinates of the light source are usually difficult to obtain, or the acquisition cost is very high. This is because the position of the light source is usually high and it is not easy to measure; and the building where the light source is located may be deformed due to changes in temperature and humidity and aging of materials, resulting in uncertainty in the position coordinates of the light source. Therefore, it is necessary to regularly up...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16G01S3/784
CPCG01S5/16G01S3/784
Inventor 朱秉诚张可涵张在琛
Owner SOUTHEAST UNIV
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