Light Fixture Redundancy Micro-Controller Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing stage light fixtures with laser lighting pose a risk to human eyes and camera devices due to high-power light beams, and existing safety measures like angle sensors and light barriers are prone to interference and failure, especially when the control system is damaged.
Innovation Solution
A light fixture with redundancy protection that includes a safety protection unit, an original micro-control unit, and a redundancy micro-control unit, both connected to a controller and an angle detector, allowing the system to adjust the light beam direction and intercept the beam if it's not aligned correctly, even if the original micro-control unit is damaged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single micro-control unit is used to control the light beam direction, then the device complexity is reduced, but the reliability decreases because the system cannot operate safely when the control unit is damaged
Solution Approach 1:
The control system is segmented into two independent micro-control units: an original micro-control unit for normal operation and a redundancy micro-control unit for safety protection. This segmentation allows the system to maintain safety functionality even when one unit fails, resolving the contradiction between reliability and complexity by dividing the control function into distinct operational and protective segments.
Solution Approach 2:
Different parts of the control system are assigned different functional qualities: the original micro-control unit handles normal light beam control tasks, while the redundancy micro-control unit is specifically designed for safety monitoring and protection. This local differentiation of functional quality enables each unit to optimize its performance for its specific purpose while maintaining overall system reliability.
2Measurement precision
If angle sensors are used to detect light beam position, then the measurement precision is improved, but the reliability worsens because the sensors are prone to electromagnetic interference and signal disruption
Solution Approach 1:
The system implements a feedback mechanism where the redundancy micro-control unit continuously receives angle detector signals and compares the detected light beam position with the intended position from control signals. This feedback loop enables real-time detection of position deviations and triggers safety protection actions when discrepancies are found, improving reliability by verifying measurement accuracy through continuous monitoring.
Solution Approach 2:
The redundancy micro-control unit acts as an intermediary between the angle detector and the safety protection unit. It receives and processes the detector signals, performs comparison operations, and only triggers protection actions when verification fails. This intermediary layer filters out false alarms from electromagnetic interference while maintaining sensitivity to genuine safety threats.
3Reliability
If the light barrier is controlled by a single controller, then the ease of operation is improved, but the reliability decreases because the laser cannot be blocked in time when the controller is damaged
Solution Approach 1:
The redundancy micro-control unit is pre-configured with safety protection logic and is ready to immediately take control of the light barrier when needed. The unit continuously monitors system state and can instantly trigger emergency blocking actions without waiting for the original controller's response, implementing preliminary preparation for emergency scenarios that ensures rapid response capability.
Solution Approach 2:
The control architecture transitions from a static single-controller design to a dynamic dual-unit system where the redundancy micro-control unit remains in standby mode during normal operation but can dynamically activate to take over control functions. This dynamic capability allows the system to adapt its control structure based on operational needs, maintaining simplicity during normal use while ensuring reliability during emergencies.
Data Source
AI summary
A light fixture with redundancy protection includes a light head with a light source inside, a driving mechanism for driving the light head to change the projection direction, an angle detector for detecting the projection direction of the light head, and an original micro-control unit and a redundancy micro-control unit both being coupled to a controller. The original micro-control unit serves to receive an angle control signal from the controller and forward same to the driving mechanism, the redundancy micro-control unit serves to receive the angle control signal from the original micro-control unit or the controller, and both the original micro-control unit and the redundancy micro-control unit are coupled to the angle detector. A safety protection unit coupled to the controller is further included which is for conducting safety protection actions according to a feedback signal from the original micro-control unit or from the redundancy micro-control unit.