Hazard management system and hazard sensor unit
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Solution Overview
Problem
Construction workers on site are exposed to various hazards, such as dust, which are not accurately measured under laboratory conditions and are influenced by localized conditions, making it difficult to implement effective protective measures.
Innovation Solution
A hazard management system comprising a hazard sensor unit, control unit, and construction equipment that detects hazards, evaluates measured values, and controls the equipment to mitigate exposure, including switching on/off or adjusting operating power, and provides user alerts through visual or acoustic signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dust emission is measured under laboratory conditions in isolation, then measurement simplicity is improved, but measurement precision deteriorates because it does not reflect real construction site conditions with multiple equipment and localized boundary conditions
Solution Approach 1:
A portable hazard sensor unit is introduced as an intermediary measurement device that can be positioned at the construction worker's location to directly measure the actual dust exposure in real construction site conditions, rather than using isolated laboratory measurements. The sensor unit includes a housing with air inlet openings and a dust sensor that measures dust concentration in the worker's breathing zone.
Solution Approach 2:
The patent replaces complex controlled laboratory measurement systems with a portable electronic sensor unit that uses optical or other sensing mechanisms to directly detect dust concentrations in real-world construction environments. This substitution enables accurate measurement of actual worker exposure without requiring controlled laboratory conditions.
2Measurement precision
If hazard sensor units are deployed at construction worker locations to measure actual exposure, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The hazard management system is segmented into independent portable sensor units that can be individually deployed at each worker's location. Each sensor unit is a self-contained device with its own housing, air inlet openings, dust sensor, and processing unit, allowing distributed measurement without requiring a centralized complex system infrastructure.
Solution Approach 2:
The hazard sensor unit is designed to autonomously measure dust concentrations, process the measurement data, evaluate hazard levels, and provide warnings without requiring constant external control or complex supporting infrastructure. The unit independently determines when hazard limit values are exceeded and activates warning signals.
3Reliability
If real-time hazard detection and control is implemented, then worker protection is improved, but loss of time in processing and responding to hazards increases
Solution Approach 1:
The control unit is pre-programmed with hazard limit values and evaluation criteria. When a sensor unit measures dust concentration, the control unit immediately compares the measurement against stored limit values and automatically determines whether a hazard exists, eliminating delays associated with manual evaluation. The system is prepared in advance to quickly process and respond to hazard conditions.
Solution Approach 2:
The system implements real-time feedback through immediate warning signals (visual and/or acoustic) when hazard limit values are exceeded. This closed-loop feedback enables instant worker awareness and prompt protective action, minimizing the time between hazard occurrence and protective response while maintaining high reliability of worker protection.
Data Source
AI summary
A hazard management system for a construction site is provided, including a hazard sensor unit, a control unit, and a piece of construction equipment, wherein the hazard sensor unit is configured to determine at least one hazard measured value of the construction site for at least one hazard, wherein the control unit is configured to evaluate the hazard measured value, and wherein the control unit is configured to control the construction equipment to switch the construction equipment on and/or off and/or to set a working parameter, and/or to provide a user of the hazard management system with a control signal for controlling the construction equipment. A hazard sensor unit is also provided.