Positioning Device FLOAT Solution Calculation Without Posture Info

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The determination of initial integer value bias in relative positioning using carrier phase differences is time-consuming, which delays the positioning process.

Innovation Solution

A positioning device with processing circuitry calculates a FLOAT solution of a particular position using carrier phase differences between multiple antennas without requiring posture information on the first station, allowing for the determination of an integer value bias, thereby accelerating the relative positioning process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional relative positioning methods using multiple reference station antennas and mobile station antennas are used, then positioning accuracy is improved, but the determination of initial integer value bias becomes time-consuming

Engineering Contradiction:

Improvepositioning accuracyVSAvoidtime for determining initial integer value bias

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by calculating the FLOAT solution first, without requiring posture information, before determining the initial integer value bias. This preliminary calculation provides an initial estimate that accelerates the subsequent bias determination process, resolving the time-consuming issue while maintaining positioning accuracy through the two-stage approach of FLOAT solution followed by integer bias resolution

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If posture information on the first station is required for calculating FLOAT solution, then positioning accuracy is improved, but the complexity of the positioning process increases

Engineering Contradiction:

ImproveFLOAT solution accuracyVSAvoidpositioning process complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the positioning process into distinct stages: first calculating the FLOAT solution without posture information to obtain an initial position estimate, then separately determining the initial integer value bias using the FLOAT solution as input. This segmentation allows each stage to be optimized independently, reducing overall process complexity while maintaining accuracy through the sequential application of each segment's results

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11366235B2Positioning device, positioning system, positioning method and positioning program

Publication Date: 2022.06.21 FURUNO ELECTRIC CO LTD

AI summary

The determination of an integer value bias may be performed at high speed. A positioning device, may include a FLOAT solution calculating part and an integer value bias determining part. The FLOAT solution calculating part may use carrier phase differences between carrier phases obtained by a plurality of antennas of a first station and a carrier phase obtained by one or more antennas of a second station provided separately from the first station to calculate a FLOAT solution of a particular position that is a relative position with respect to the second station, without using posture information on the first station. The integer value bias determining part may determine an integer value bias of the carrier phase difference, using the FLOAT solution of the particular position and the posture information on the first station.