Light Fixture Calibration Feedback for Accurate Beam Positioning
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Solution Overview
Problem
Existing light fixtures face inaccuracies in movement control due to deviations between reference and actual stroke values, leading to errors in beam positioning, primarily caused by mechanical tolerances and calibration differences.
Innovation Solution
The light fixture incorporates calibration data that are made available to the control device, allowing it to correct and update movement commands based on actual stroke values, using bidirectional communication protocols and position sensors to ensure accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reference stroke values from manufacturer data are used for control, then the control device can operate with nominal data, but the actual beam position deviates due to mechanical tolerances and calibration differences
Solution Approach 1:
The system implements feedback by having the light fixture transmit its actual calibration data (measured stroke values and zero positions) back to the control device. The control device then uses this feedback information to adjust its control commands, creating a closed-loop system that compensates for manufacturing variations and ensures accurate beam positioning.
Solution Approach 2:
The system changes the control parameters dynamically by switching from fixed reference stroke values to adaptive parameters based on actual calibration data. The control device modifies its internal stroke values and zero position parameters according to the specific characteristics of each light fixture, allowing precise control despite manufacturing tolerances.
2Measurement precision
If calibration data are stored in the light fixture and transmitted to the control device, then positioning accuracy is improved, but the device complexity increases due to bidirectional communication requirements
Solution Approach 1:
The calibration data are pre-measured and stored in the light fixture's memory during manufacturing or initial setup. This preliminary action eliminates the need for complex real-time calibration procedures, as the fixture already contains its characteristic data ready for transmission to the control device, simplifying the overall system operation.
Solution Approach 2:
The communication interface acts as an intermediary that handles the bidirectional data exchange between the light fixture and control device. This intermediary layer manages the transmission of calibration data and control commands, abstracting the complexity of the interaction and making the system easier to control despite the enhanced communication capabilities.
Data Source
Figure 1
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Figure 3
AI summary
A control method of a light fixture (1), wherein the light fixture (1) comprises: a housing (2), extending along a longitudinal axis (Z) and comprising a light source (4); actuators (15), configured to cause movements of the housing (2); a control unit (10), configured to control the actuators (15); a memory module (20), connected to the control unit (10); and an interface (25, 40). The control method comprises: storing, in the memory module (20), calibration data (D) of the movements of the housing (2); and making the calibration data (D) available to the outside of the light fixture (1) through the interface (25, 40).