AGV Localization Using Triangular Transponder Arrays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current radio signal-based localization systems for automated guided vehicles (AGVs) face challenges in providing accurate and reliable position information, often with inaccuracies between +/−2 meters and +/−20 cm, and require enhanced reliability and diagnostic coverage for safety tasks.
Innovation Solution
A safety system utilizing a radio location system with at least three radio stations and three spaced-apart radio transponders forming a triangular arrangement in space, allowing for precise position and orientation determination, with a control and evaluation unit comparing position data to ensure accuracy and reliability, and optionally using actuators to vary distances and directions for dynamic testing and error avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radio signal-based localization systems are used for AGV positioning, then position information can be obtained, but the accuracy is insufficient (between +/−2 meters and +/−20 cm)
Solution Approach 1:
The system divides the localization task into multiple independent measurements by using three or more radio transponders arranged in a triangular pattern on the AGV. Each transponder provides independent position data, and the control unit processes these segmented measurements to determine the overall position and orientation, thereby improving accuracy beyond what a single transponder could achieve.
Solution Approach 2:
The control and evaluation unit continuously receives position data from multiple radio stations, compares the measured positions with expected positions based on the triangular transponder arrangement, and uses this feedback to verify localization accuracy. The system checks whether the measured distances and positions are consistent with the known geometry of the transponder configuration, providing ongoing validation of localization reliability.
2Reliability
If a single radio transponder is used for localization, then the system is simple, but diagnostic coverage and error detection capability are insufficient
Solution Approach 1:
Each radio transponder in the triangular arrangement serves a specific local function of providing independent position data from a known location. The control unit processes each transponder's data individually, comparing expected versus actual positions to detect errors. This localized approach to quality control enables comprehensive diagnostic coverage while maintaining a relatively simple overall system architecture.
3Measurement precision
If three or more radio transponders are arranged in a triangular pattern, then position and orientation can be unambiguously determined, but the device complexity increases
Solution Approach 1:
The system transitions from one-dimensional linear transponder arrangements to a two-dimensional triangular configuration. This dimensional change enables the determination of both position and orientation (alignment) of the AGV, as the triangular pattern provides angular information that a linear arrangement cannot provide. The three non-collinear points define a plane and enable unambiguous orientation calculation.
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
This solution provides a stable, reliable, and precise position detection system for AGVs, enabling accurate alignment and quality checks, and can identify specific objects or persons based on unique transponder arrangements, enhancing safety and operational efficiency.
Implementation Method 1
triangulation on the basis of three or more stations such as was implemented with UWB, GPS and other technologies
Implementation Method 2
by navigation on the basis of a reaction from a detection of the time of flight, that provide a distance from the circumjacent objects
Data Source
AI summary
A safety system and a method for localizing at least one object having a control and evaluation unit have at least one radio location system. The radio location system has at least three arranged radio stations. Position data of the object can be determined by means of the radio location system and can be transmitted to the control and evaluation unit. At least three radio transponders are arranged at the object, each arranged spaced apart from one another and the three radio transponders form different points on a plane and unambiguously define the plane in space. The control and evaluation unit is configured to compare the position data of the radio transponders and to form checked position data of the object. The control and evaluation unit is configured to form orientation data of the object from the position data of the radio transponders.