Indoor Positioning Light Beam Emission System
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Solution Overview
Problem
Existing indoor laser positioning systems face limitations in expanding positioning space due to laser overlapping areas, which lead to inaccurate positioning.
Innovation Solution
A positioning light beam emission system with multiple devices emitting light beams at different sweeping cycles and angular velocities, ensuring non-perpendicular rotation axes and time-divided modes to avoid overlapping, allowing for expanded coverage without exceeding adjacent spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a base station structure is simply multiplexed and expanded to enlarge positioning space, then the positioning space can be expanded, but laser overlapping areas occur leading to inaccurate positioning
Solution Approach 1:
The patent implements periodic action by setting different sweeping cycles for different positioning light beam emission devices. Each device emits laser beams in periodic sweeping motions with predetermined cycles, ensuring that adjacent devices operate at different time periods. This temporal separation prevents laser beam overlap while maintaining continuous coverage of the expanded positioning space, thus preserving positioning accuracy.
Solution Approach 2:
The patent applies dynamics by making the sweeping rotation axes non-perpendicular to the extending directions of the linear cross sections of the laser beams. This dynamic angular configuration allows the laser beams to sweep through different spatial paths, preventing overlapping with beams from adjacent devices even when the positioning space is expanded. The dynamic sweeping pattern ensures comprehensive coverage without interference.
2Reliability
If laser sweeping is used to cover positioning space, then positioning can be performed, but the sweeping area is limited restricting space expansion
Solution Approach 1:
The patent applies segmentation by dividing the positioning space into multiple sub-spaces, each covered by a dedicated positioning light beam emission device. Each device independently performs laser sweeping within its assigned sub-space with predetermined angular velocities and sweeping cycles. This segmentation allows the overall positioning space to be expanded while each individual device maintains reliable positioning capability within its coverage area.
Solution Approach 2:
The patent utilizes another dimension by introducing temporal dimension through different sweeping cycles and time periods for adjacent devices. In addition to spatial segmentation, devices operate at different times, creating a four-dimensional coverage (three spatial dimensions plus time). This allows expansion of positioning space beyond the limited sweeping area of a single device while maintaining positioning reliability through coordinated multi-device operation.
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
Enables the expansion of positioning space while preventing laser overlapping, maintaining high accuracy and avoiding interference, thus enhancing indoor positioning capabilities.
Implementation Method 1
each of the positioning light beam emission devices being used for emitting, in a sweeping manner, a positioning light beam toward the positioning sub-space in which it is located, with a predetermined sweeping cycle and at a predetermined angular velocity, the positioning light beam having a linear cross section and rotating about a sweeping rotation axis
Data Source
AI summary
The invention discloses a positioning light beam emission system, a method and an indoor positioning system. A positioning space includes a plurality of positioning sub-spaces. A plurality of positioning light beam emission devices are fixed at predetermined positions in the plurality of positioning sub-spaces, respectively, and the positioning light beam emission devices are used for sweeping positioning light beams toward the respective positioning sub-spaces in which they are located with a predetermined sweeping cycle and at a predetermined angular velocity. The positioning light beam has a linear cross section and is rotated about a sweeping rotation axis, and the sweeping rotation axis is not perpendicular to an extending direction of the linear cross section.