Optical Surface Actuation for Scanning and Self-Cleaning
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Solution Overview
Problem
Existing beam-based optical detection systems, such as those used for smoke detection, face issues with size, weight, reliability, maintenance costs, and power consumption due to mechanical actuators, and require manual cleaning of optical surfaces which is time-consuming and expensive.
Innovation Solution
A detection system employing a solid state flexible actuator coupled to an optical surface, capable of rotating the surface for scanning and cleaning at higher frequencies than traditional electromechanical actuators, using an electroactive polymer that deflects in response to voltage, reducing the need for manual maintenance and lowering operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a mechanical actuator system is used to rotate the optical surface, then the optical surface can be directed to scan an area, but the size and weight of the sensor increase
Solution Approach 1:
The patent replaces traditional mechanical actuators with a voice coil actuator that uses electromagnetic fields to rotate the optical surface. This substitution eliminates complex mechanical components such as motors, gears, and bearings, thereby significantly reducing the size and weight of the sensor while maintaining the scanning capability.
Solution Approach 2:
The patent extracts and removes unnecessary mechanical components from the actuation system, keeping only the essential voice coil actuator and optical surface assembly. This extraction of non-essential mechanical parts reduces overall system weight and complexity while preserving the core scanning function.
2Speed
If a mechanical actuator system is used to rotate the optical surface, then the optical surface can be directed to scan an area, but the reliability of the system decreases
Solution Approach 1:
The patent replaces mechanical actuators with an electromagnetic voice coil actuator that has no physical contact or moving mechanical parts. This eliminates wear, friction, and mechanical failure modes, thereby significantly improving system reliability while maintaining the scanning function.
Solution Approach 2:
The voice coil actuator is designed to be maintenance-free with no moving parts that require lubrication or adjustment. The system serves itself by using electromagnetic fields directly to achieve rotation without mechanical intermediaries that could fail or require maintenance.
3Speed
If a mechanical actuator system is used to rotate the optical surface, then the optical surface can be directed to scan an area, but the maintenance costs increase
Solution Approach 1:
The patent replaces mechanical actuators with a voice coil actuator that has no moving mechanical parts requiring maintenance. This substitution eliminates the need for lubrication, adjustment, and repair of mechanical components, thereby significantly reducing maintenance costs while preserving scanning capability.
Solution Approach 2:
The actuation system is designed to be maintenance-free, with the voice coil actuator requiring no service intervals or repairs. The system effectively serves itself by using electromagnetic fields without mechanical wear components that would require human intervention or cost money to maintain.
4Speed
If a mechanical actuator system is used to rotate the optical surface, then the optical surface can be directed to scan an area, but the power consumption increases
Solution Approach 1:
The patent replaces power-hungry mechanical actuators with a voice coil actuator that uses electromagnetic fields for actuation. This substitution significantly reduces power consumption by eliminating the need to drive mechanical motors, gears, and other high-power mechanical components while maintaining scanning capability.
5Object-affected harmful factors
If manual cleaning is performed on optical surfaces, then debris can be removed, but the process is time-consuming and expensive
Solution Approach 1:
The patent employs ultrasonic vibration applied to the optical surface to automatically remove debris and contaminants. This vibration-based cleaning mechanism continuously prevents buildup without requiring manual intervention, thereby eliminating time loss and high costs associated with manual cleaning while effectively removing harmful debris.
Solution Approach 2:
The optical surface cleaning is performed automatically through ultrasonic vibration integrated into the sensor system. The system cleans itself without requiring external manual intervention, thereby eliminating the time and cost associated with human-operated cleaning processes while maintaining optical surface purity.
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 improved reliability, reduced size and weight, lower power consumption, and automatic debris removal, enhancing accuracy and reducing maintenance needs while maintaining effective light pulse detection.
Implementation Method 1
The solid state flexible actuator comprises a solid state flexible polymer deformable in response to application of a voltage to the solid state flexible polymer
Implementation Method 2
The solid state flexible actuator agitates the optical surface at a frequency between about 1 Hz and 1 kHz
Data Source
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AI summary
A scanner of an optical detection system includes a housing, an optical surface coupled to the housing, and an actuator coupled to the optical surface. The optical surface is movable to direct light into an area being scanned and to receive a reflected light pulse from the area being scanned. The actuator is operable to agitate the optical surface to remove debris from the optical surface.