Fan Fall Detection Using Gravity Sensor for Timely Power Shutdown
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Solution Overview
Problem
Existing fan protection systems lack sensitivity in detecting when a fan falls, leading to potential security issues due to continued operation and delayed user notification, as they often rely on pressure contacts that may fail to trigger alarms timely.
Innovation Solution
A method and system utilizing a gravity sensor to monitor the fan's coordinate data, determining if it has deviated from a standing state by analyzing horizontal coordinate changes over time, raising an alarm, and sending notifications to a user's mobile terminal to disable the fan and prevent continued operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a pressure contact is used to detect fan fall, then the structure is simple, but the detection sensitivity is low and may fail to trigger timely
Solution Approach 1:
The patent replaces the mechanical pressure contact system with an electronic gravity sensor system. The gravity sensor detects changes in gravitational force direction when the fan falls, converting a mechanical detection problem into an electronic sensing problem. This substitution significantly improves detection sensitivity while maintaining acceptable system complexity through integrated sensor modules.
Solution Approach 2:
The patent changes the detection parameter from pressure magnitude (pressure contact) to gravitational force direction and magnitude (gravity sensor). By monitoring changes in gravitational parameters, the system can detect fan falls more sensitively and accurately, triggering protective actions before serious hazards occur.
2Measurement precision
If a gravity sensor is used to detect fan fall, then the detection sensitivity is high, but the device complexity increases
Solution Approach 1:
The gravity sensor serves multiple functions: detecting fan falls, determining fall direction, and triggering protective actions. By making the sensor multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in overall system complexity while maintaining high detection sensitivity.
Solution Approach 2:
The gravity sensor automatically detects fall conditions and triggers protective actions without requiring complex external control systems. The sensor integrates detection and signaling functions, allowing the system to self-monitor and self-protect, which minimizes the complexity increase despite enhanced detection capabilities.
3Device complexity
If pressure contact is used, then the system is simple, but user notification is delayed and security issues may occur
Solution Approach 1:
The gravity sensor detects fan falls earlier in the process compared to pressure contacts, enabling preliminary protective actions before the fan fully collapses or causes hazards. This early detection allows the system to cut power and notify users before security issues arise, improving reliability without excessive complexity.
Solution Approach 2:
The system implements feedback by continuously monitoring gravity sensor data and immediately responding to fall detections. This real-time feedback mechanism ensures rapid user notification and protective action, enhancing security reliability while maintaining system simplicity through direct sensor-to-controller connections.
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
Enhances sensitivity in detecting fan falls, ensuring timely power shutdown and user notification, thereby preventing security issues and allowing real-time monitoring of the fan's state.
Implementation Method 1
a gravity sensor, in which the coordinate data of the fan is acquired by the gravity sensor
Data Source
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Figure 3
Figure 4~5
AI summary
The present disclosure provides a method and a system for protecting an electrical device and an electrical device. The method includes: acquiring (S10) coordinate data of the electrical device; and determining (S20) whether the coordinate data is beyond a scope of a preset state of the electrical device, and disabling the electrical device if the coordinate data is beyond the scope of the preset state. Correspondingly, the system (500) includes: an acquiring module (51) and a control module (52), an acquiring module (51) configured to acquire coordinate data of the electrical device; and the control module (52) configured to determine whether the coordinate data is beyond a scope of a preset state of the electrical device, and to disable the electrical device if the coordinate data is beyond the scope of the preset state.