Imaging Sensor Configuration for Digital Pulse Recognition
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Solution Overview
Problem
Existing indoor positioning systems face challenges in accuracy due to the limitations of GPS in indoor environments and the unpredictability of radio wave propagation in complex indoor settings, necessitating a more reliable and accurate method for locating mobile devices within buildings.
Innovation Solution
A light-based positioning system using modulated LED light sources that transmit identification codes through visible light, allowing mobile devices equipped with image sensors to determine their position by capturing and demodulating the digital pulse recognition signals, thereby improving positioning accuracy and enabling the delivery of relevant content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS is used for positioning, then outdoor positioning accuracy is maintained, but indoor positioning accuracy deteriorates due to signal blockage
Solution Approach 1:
The patent introduces light sources as intermediary objects that emit optical signals for positioning. These light sources act as mediators between the positioning system and mobile devices, enabling indoor positioning where GPS signals are blocked. The light sources transmit identification codes that mobile devices can capture and use to determine position, thus resolving the contradiction between maintaining positioning availability and achieving indoor accuracy.
2Area of stationary object
If radio wave propagation is used for indoor positioning, then positioning coverage is achieved, but accuracy deteriorates due to unpredictable propagation in complex indoor settings
Solution Approach 1:
The patent replaces radio wave-based positioning with light-based positioning. Optical signals from light sources are used instead of radio waves, providing more predictable and accurate positioning in indoor environments. The light-based system uses direct line-of-sight propagation characteristics to achieve higher accuracy while maintaining coverage, substituting the problematic radio wave mechanism with a more reliable optical mechanism.
3Measurement precision
If light-based positioning with modulated LED sources is used, then positioning accuracy improves to centimeter level, but device complexity increases due to image sensor configuration requirements
Solution Approach 1:
The patent modifies the operating parameters of existing image sensors to enable light-based positioning. By adjusting exposure time, gain, and other sensor parameters, the system achieves centimeter-level positioning accuracy using standard mobile device cameras. This parameter adjustment approach allows high precision without requiring completely new hardware, thus managing complexity while achieving the desired accuracy improvement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides precise indoor positioning with high accuracy, down to a few centimeters in three dimensions, and facilitates the delivery of location-specific content to mobile devices, enhancing location-aware computing and augmented reality applications.
Implementation Method 1
an imaging sensor to capture successive images of the light source
Data Source
AI summary
In one aspect, the present disclosure relates to a method for configuring one or more imaging sensors of an imaging device to capture digital images for digital pulse recognition demodulation. In some embodiments, the method includes initializing one or more imaging sensors of the imaging device, determining a subset of the one or more imaging sensors to configure, setting a configuration for each of the one or more imaging sensors of the subset by defining a region of interest as a metering area for each of the one or more imaging sensors of the subset and automatically adjusting a setting for each of the one or more imaging sensors of the subset, and adjusting input parameters of a demodulation function based on a device profile of the imaging device. In some embodiments, the adjusted setting is locked to prevent further adjustment of the adjusted setting.