Pressure Sensor Layout Comparison for Foreign Object Detection
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Solution Overview
Problem
Existing industrial machinery safety systems do not effectively detect foreign objects in the vicinity before starting operations, which can lead to accidents or equipment damage.
Innovation Solution
A foreign object detecting device comprising a sheet-type pressure sensor, a sensor information processing unit, and a judgement unit that compares sensor information with basic layout information to identify and notify the presence of foreign objects, and optionally update the layout information and control machinery operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If industrial machinery operations are restricted when workers are present in dangerous areas, then worker safety is improved, but machinery productivity deteriorates
Solution Approach 1:
The system performs preliminary detection of workers in dangerous areas before machinery operations commence. The detection device identifies worker presence in advance, allowing the control device to prevent harmful operations before they occur, thus ensuring safety without unnecessarily restricting productivity when areas are clear
Solution Approach 2:
The system continuously monitors dangerous areas and provides real-time feedback to the control device. When workers are detected, the feedback triggers operation restrictions; when areas are clear, normal operations resume. This dynamic feedback mechanism balances safety requirements with productivity optimization
2Measurement precision
If foreign object detection is performed using traditional methods, then detection capability is limited, but system complexity increases
Solution Approach 1:
The pressure sensor serves multiple functions: it detects worker presence in dangerous areas, identifies foreign objects on workpieces, and provides data for both safety control and quality inspection. This multi-functional approach achieves comprehensive detection capability without increasing system complexity, as one sensor handles multiple detection tasks
Solution Approach 2:
The system merges foreign object detection functionality with the existing worker detection system. The same pressure sensor and control device used for safety monitoring are also employed to detect foreign objects by analyzing pressure distribution patterns, thereby achieving enhanced detection capability without adding separate complex detection systems
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
Ensures safety by accurately detecting foreign objects, preventing accidents and equipment damage by restricting or stopping machinery operations when foreign objects are present, and allowing for safe operation by updating layout information to include recognized objects.
Implementation Method 1
an input unit to which a detection signal is inputted from a sheet-type pressure sensor
Data Source
AI summary
A foreign object detecting device includes: an input unit to which a detection signal is inputted from a sheet-type pressure sensor; a sensor information processing unit configured to, based on the detection signal, generate sensor information indicating an area in a detection area of the pressure sensor to which a pressure is being applied; and a judgement unit configured to compare the sensor information and basic layout information indicating a predetermined area in the detection area to which a pressure is applied, to thereby judge whether a foreign object is present in the detection area.