Elevating Machine Safety System Field Detection
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Solution Overview
Problem
Existing safety systems for elevating machines are unreliable in detecting the proximity and direction of overhead electrical power lines due to distortion by the machine's structure and other conductors, leading to false alarms and operator distrust.
Innovation Solution
A safety system with multiple sensor assemblies mounted on different parts of the elevating machine, using electric and magnetic field sensors, and a data processor that analyzes sensor signals based on learned data to accurately determine the positional relationship with power lines, accounting for machine structure and external factors, and triggers alarms or restricts movement to prevent hazardous situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If electric field sensors are used to detect proximity to overhead power lines, then the ability to sense electrical hazards is improved, but the reliability of detection deteriorates due to field distortion by the machine structure and nearby conductors
Solution Approach 1:
The system divides the detection task into multiple independent sensor assemblies positioned at different locations on the elevating machine. Each sensor assembly independently measures the electric field, and the data processor combines these segmented measurements to determine the machine's positional relationship with power lines, thereby compensating for local field distortions.
Solution Approach 2:
The system transitions from single-point electric field magnitude detection to multi-dimensional spatial detection by positioning sensor assemblies at multiple locations (base, boom, platform) and analyzing the spatial distribution pattern of electric field vectors. This dimensional expansion allows the system to distinguish between field variations caused by machine structure and those caused by proximity to power lines.
2Reliability
If multiple sensor assemblies are deployed to improve detection accuracy, then the reliability of hazard detection is improved, but the device complexity increases
Solution Approach 1:
Each sensor assembly is designed as a universal, multi-functional unit capable of measuring electric field vectors in three orthogonal directions. These standardized sensor assemblies can be positioned at multiple locations and serve both as individual detection points and as components of the overall spatial detection system, reducing design complexity while maintaining reliability.
Solution Approach 2:
The system merges the functions of multiple sensor assemblies and their associated data processing into a unified detection system. The data processor integrates measurements from all sensor assemblies and applies a unified analysis method based on learned data patterns, simplifying the overall system architecture despite the presence of multiple sensors.
3Measurement precision
If the system accounts for machine structure and external factors in the analysis, then the measurement precision is improved, but the extent of automation required increases
Solution Approach 1:
The system performs preliminary action by pre-storing learned data that represents the characteristic electric field patterns associated with various machine configurations and external conditions. During operation, the data processor compares real-time sensor measurements against this pre-stored reference data, enabling precise positional determination without requiring complex real-time calculations that would demand excessive automation.
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
The system provides reliable detection of power line proximity and direction, reducing false alarms and ensuring operator safety by accurately determining the machine's position relative to power lines, thus preventing accidents and damage.
Implementation Method 1
sensing at least one field associated with an electric current or voltage
Implementation Method 2
sensing at least one field associated with an electric current or voltage
Data Source
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AI summary
A safety system is proved for an elevating machine having a base part and an elevating part. The safety system includes a plurality of sensor assemblies for sensing an electric or magnetic field, which are mounted on different parts of the elevating machine. A data processor is connected to receive sensor signals from the sensor assemblies. A memory stores data relating to numerous patterns of sensor signals associated with the interaction between the elevating machine and an electric or magnetic field. The data processor compares the received sensor signals with the stored data and identifies the positional relationship between the elevating machine and a source of the sensed field.