Lighting Sensor Calibration via Chronological Coordination
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Solution Overview
Problem
Existing methods for calibrating lighting devices and optical sensors struggle to accurately calibrate over long distances and fail to account for the interaction between the two components, leading to difficulties in maintaining precise measurements and adhering to legal requirements, especially in varying environmental conditions.
Innovation Solution
A method where the control of the lighting device and optical sensor are chronologically coordinated, allowing for a series of recordings to determine the actual distance of a calibration marker, enabling precise calibration of the visible distance region and accounting for ageing effects, with the option to adjust the lighting intensity based on photon measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If calibration is performed using a small number of distance measurements, then calibration time is reduced, but measurement precision may be compromised
Solution Approach 1:
The patent applies preliminary action by pre-defining the visible distance region boundaries before calibration occurs. The control device is configured with predetermined near and far borders of the visible distance region, allowing calibration to focus only on verifying these pre-established boundaries rather than determining them from scratch. This reduces calibration time while maintaining precision through the use of pre-calibrated reference values.
Solution Approach 2:
The patent uses calibration markers as intermediaries to transfer known distance information to the lighting device and optical sensor system. These markers with predetermined positions and dimensions serve as reference objects that mediate between the physical environment and the measurement system, enabling accurate calibration with minimal measurements by providing known geometric relationships.
2Measurement precision
If the dimension of the calibration environment matches the operational environment, then calibration accuracy is improved, but calibration complexity and resource requirements increase
Solution Approach 1:
The patent extracts the essential calibration information from the complex operational environment by using calibration markers with predetermined, known dimensions and positions. Instead of requiring the entire operational environment to be replicated, the system extracts only the necessary geometric references (marker positions, sizes, and relationships) to perform accurate calibration. This simplifies the calibration setup while maintaining accuracy.
Solution Approach 2:
The calibration markers serve multiple functions: they provide distance references, position references, orientation references, and scaling references all in a single component. This multi-functionality allows the calibration system to handle various calibration requirements (distance measurement, positioning, scaling) using a universal calibration object, reducing the need for multiple specialized calibration tools and simplifying the overall calibration process.
3Measurement precision
If chronological coordination between lighting device and optical sensor is implemented, then measurement precision is improved, but control system complexity increases
Solution Approach 1:
The patent implements periodic action through synchronized pulsed operation of the lighting device and optical sensor. The lighting device emits light pulses at regular intervals, and the optical sensor is activated chronologically coordinated with these pulses to capture reflections only during specific time windows. This periodic synchronization ensures that only light from the intended distance range is measured, improving precision by eliminating interference from other distance regions while using simple on/off timing control.
Solution Approach 2:
The system uses feedback from the optical sensor measurements to adjust and refine the chronological coordination between lighting and sensing. By measuring the actual time of flight of light pulses and comparing it with expected values, the system can optimize the timing synchronization to maximize measurement precision. This feedback mechanism allows the control system to adapt to variations in the optical path while maintaining simple periodic control.
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
This method enhances the measurement precision of lighting devices and optical sensors, allows for early detection of component failures, and ensures accurate distance measurements by coordinating the control of lighting devices and optical sensors, thus meeting legal requirements and compensating for environmental changes.
Implementation Method 1
light pulses are emitted by means of the lighting device. These emitted light pulses are compared with a reference light pulse
Data Source
AI summary
A method for calibrating a lighting device and an optical sensor includes a control of the lighting device and the optical sensor are chronologically coordinated with each other. A visible distance region is assigned to the coordinated control. A series of recordings in chronological sequence are recorded with the optical sensor via the coordinated control when lit by the lighting device. In a recording that is chronologically first in the series, in which a calibration marker that has a pre-determined dimension is recognized, an actual distance of the calibration marker is determined using the pre-determined dimension. The coordinated control and/or the visible distance region are evaluated and/or changed on a basis of a far border of the visible distance region and the actual distance.