Safety System Using Radio Transponders for Human-Object Classification
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Solution Overview
Problem
Current safety systems cannot reliably distinguish between humans and objects, leading to unnecessary shutdowns and reduced productivity in machines, as they lack the capability to classify objects beyond basic physical features, which is crucial for situation-specific control and risk management.
Innovation Solution
A safety system combining a radio location system with a spatially resolving sensor, where radio transponders provide position and classification data, allowing for accurate identification and validation of persons or objects, enabling more specific safety functions and optimizing machine operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple detection function of existing safety sensors is used to reliably safeguard hazard areas, then safety reliability is improved, but productivity deteriorates due to unnecessary shutdowns
Solution Approach 1:
The detection function is segmented into two independent parts: a simple presence detection function for safety monitoring and a classification function for object identification. The simple detection function continues to provide reliable safety monitoring, while the classification function analyzes object types to determine whether shutdowns are necessary, thereby maintaining safety reliability while reducing unnecessary productivity loss
Solution Approach 2:
A classification unit is introduced as an intermediary between the simple detection function and the machine control system. This intermediary analyzes the detected objects to distinguish between hazardous and non-hazardous items, allowing the system to maintain safety reliability through continuous monitoring while avoiding unnecessary shutdowns by filtering out non-critical detections
2Measurement precision
If image data are used for object classification to enable safe distinction of humans and objects, then classification accuracy is improved, but device complexity and cost deteriorate
Solution Approach 1:
The complex image processing system is replaced with a radio location system that uses electromagnetic waves to detect and classify objects. The radio transponders attached to objects provide identification information through simple radio communication, substituting the need for complex image capture and processing hardware while achieving accurate classification
Solution Approach 2:
Instead of using complex image data that requires substantial processing, the system uses simplified radio transponder signals that contain encoded object identification information. These radio signals serve as a simplified copy or representation of object identity, enabling accurate classification without the complexity of image processing systems
3Measurement precision
If image data are used for object classification to enable safe distinction of humans and objects, then classification accuracy is improved, but latency time deteriorates
Solution Approach 1:
The time-consuming image processing system is replaced with a radio location system that transmits and receives signals in milliseconds. The radio transponders provide immediate identification information through electromagnetic communication, eliminating the substantial latency associated with capturing, transmitting, and processing image data while maintaining classification accuracy
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 enables safe and efficient classification of humans and objects, allowing for tailored safety functions, reducing risk without impairing productivity, and providing real-time, accurate position and behavioral pattern prediction, thus enhancing industrial safety and machine performance.
Implementation Method 1
The radio location system (4) enables the classification of persons or objects in a favorable and simple manner. In accordance with the invention, an evaluation can take place at higher semantic levels.
Implementation Method 2
position data and contour data of the person or object can be determined by means of the spatially resolving sensor (7)
Implementation Method 3
the control and evaluation unit (3) is configured to compare the position data of the radio location system (4) and the position data of the sensor (7) and to form tested position data on an agreement
Implementation Method 4
the control and evaluation unit (3) is configured to compare the classification data of the radio station (5) with the contour data of the spatially resolving sensor (7) and to check for plausibility
Data Source
AI summary
A safety system for localizing a person or object has a control and evaluation unit, at least one radio location system, and at least one spatially resolving sensor for the position determination of the person or object. The radio location system has arranged radio stations, wherein at least one radio transponder is arranged at the person or object. Position data and classification data of the person or object can be determined by means of the radio location system. The position data and the classification data can be transmitted from the radio station to the control and evaluation unit and position data and contour data of the person or object can be determined by means of the spatially resolving sensor. The control and evaluation unit is configured to compare the position data of the radio location system and the position data of the spatially resolving sensor.