Sensor Position Transformation for Global Facility Coordinates
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Solution Overview
Problem
Existing methods for determining the position of objects in process and factory automation systems, such as radar systems, only provide distance and angular positions relative to the sensor, making it difficult for service personnel to accurately locate objects without knowing the sensor's orientation, especially in multi-sensor environments.
Innovation Solution
A method that sets a local sensor coordinate system and a global target coordinate system, determines transformation parameters, and transforms the object's position from local to global coordinates, allowing the position to be communicated remotely and independently of the sensor's orientation, enabling accurate object location without requiring knowledge of the sensor's orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors determine position relative to the sensor itself using local coordinate systems, then measurement precision is maintained, but ease of operation deteriorates because service personnel cannot locate objects without knowing sensor orientation
Solution Approach 1:
A coordinate transformation system acts as an intermediary between the sensor's local coordinate system and the facility's global coordinate system. The computing unit transforms position data from sensor-relative coordinates to facility-relative coordinates, allowing service personnel to locate objects using the global coordinate system without needing to know sensor orientation, while the sensor maintains its precise local measurement capability
Solution Approach 2:
The position information is copied and represented in two coordinate systems simultaneously - the original sensor-relative coordinates and the transformed facility-relative coordinates. This allows the same position data to be used both for precise measurement and for easy service personnel operation
2Adaptability or versatility
If multiple sensors are deployed in a facility, then monitoring coverage is improved, but device complexity increases making position interpretation difficult
Solution Approach 1:
The coordinate transformation system provides a universal reference frame (global facility coordinate system) that all sensors can use. Each sensor transforms its local measurements to this common global system, allowing multiple sensors to operate independently while their data can be easily integrated and interpreted in a unified coordinate framework, reducing the complexity of multi-sensor environments
3Measurement precision
If sensor orientation information is required for object location, then measurement precision is maintained, but loss of information occurs because this information is not communicated to service personnel
Solution Approach 1:
The coordinate transformation system serves as an intermediary that processes sensor orientation information internally during the transformation calculation, then outputs only the necessary facility-relative position information. The orientation data is used but not transmitted, eliminating information loss while maintaining measurement precision
Data Source
AI summary
A method for determining a position of an object by a sensor, including setting a local sensor coordinate system, setting a global target coordinate system, determining transformation parameters for transforming coordinates in the local sensor coordinate system to coordinates in the global target coordinate system, capturing the position of the object in local coordinates, transforming the position of the object to coordinates in the global target coordinate system.