Multimodal Sensing Positioning via Reference Map Grids

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing personnel positioning systems in high-risk production environments face challenges with precision and real-time accuracy due to interference from large structures, high energy consumption, and infrastructure costs, as well as delays in determining suitable positioning techniques.

Innovation Solution

A multimodal sensing positioning system that uses environment reference maps and indicator vectors to selectively activate positioning techniques, separating environment modeling from real-time positioning, and employing PDR positioning errors independently of landmarks to reduce energy consumption and infrastructure needs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multimodal positioning techniques are used to improve positioning precision, then positioning accuracy is improved, but energy consumption increases

Engineering Contradiction:

Improvepositioning precisionVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system pre-calculates and stores positioning technique indicator vectors for different grid areas during an environment modeling phase, so that during real-time positioning, the terminal can directly query and activate pre-selected techniques without performing complex real-time analysis, thereby reducing energy consumption while maintaining positioning precision

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the positioning techniques activated at different locations by querying the reference map based on current grid area, allowing the terminal to use only the necessary positioning techniques for each specific environment, thus optimizing energy consumption while preserving positioning accuracy

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If real-time environmental sensing is performed to determine suitable positioning techniques, then positioning adaptability is improved, but positioning delay increases

Engineering Contradiction:

Improvepositioning technique selectionVSAvoidpositioning delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system performs environment modeling and determines positioning technique indicator vectors in advance for all grid areas, storing them in a reference map. During real-time positioning, the terminal only needs to query the pre-computed reference map based on its current grid location, eliminating time-consuming real-time environmental sensing while maintaining adaptability to different positioning environments

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The positioning area is divided into multiple grid areas, each with pre-determined positioning technique indicator vectors. This segmentation allows the system to pre-compute positioning strategies for each grid area independently, enabling fast lookup during real-time positioning without requiring comprehensive real-time environmental analysis

Inventive Principle:

Principle #1Segmentation

3Reliability

If all signal receiving units are kept working to ensure positioning availability, then positioning reliability is improved, but energy consumption increases

Engineering Contradiction:

Improvepositioning availabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically activates only the positioning techniques indicated by the reference map for the current grid area, rather than keeping all signal receiving units working continuously. This dynamic activation strategy ensures positioning reliability by using appropriate techniques for each environment while significantly reducing energy consumption by keeping unnecessary units in standby mode

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The positioning terminal autonomously determines which positioning techniques to activate by querying the reference map based on its current grid location, without requiring external control. This self-service mechanism ensures that the terminal always uses the most appropriate positioning techniques for its environment while minimizing energy consumption by activating only necessary functions

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11783258B2Multimodal sensing positioning model oriented to high-risk production environment and system thereof

Publication Date: 2023.10.10 HUAZHONG UNIV OF SCI & TECH

AI summary

The present invention relates to a multimodal sensing positioning system orientated to a high-risk production environment, the positioning system comprising: at least one positioning terminal, configured to be worn by a to-be-positioned subject and use at least one positioning technique to conduct multimodal sensing positioning so as to identify a current location information of the subject in the high-risk production environment; and a monitoring terminal, communicating with the positioning terminal so as to remotely monitor the current location of the subject. The present invention improves positioning precision while ensuring realtimeness of multimodal positioning.