Multi-Spectrum Detection Device Synchronization Circuit
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Solution Overview
Problem
Electromagnetic detection devices struggle to operate effectively in varied illumination conditions due to their configuration for precise dynamics in specific spectral bands, often functioning under unfavorable conditions.
Innovation Solution
The device comprises multiple photodetectors sensitive to different wavelengths, each with a reading circuit and reset circuit, synchronized by a synchronization signal generator and clock signal generator to modulate integration duration based on predefined patterns and threshold values, allowing for adaptable operation across various illumination conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple photodetectors are used for different spectral bands, then information capture capability is improved, but device complexity increases
Solution Approach 1:
The device segments the detection system into multiple photodetectors, each dedicated to a specific spectral band. Each photodetector has its own reading circuit with integration capacitor and reset circuit, allowing independent optimization for each spectral band while maintaining overall system functionality.
Solution Approach 2:
The synchronization circuit serves multiple functions: it generates synchronization signals for all photodetectors, counts clock signal patterns, compares counts against stored thresholds, and controls reset operations across multiple reading circuits. This multi-functional approach reduces overall device complexity despite having multiple photodetectors.
2Measurement precision
If precise illumination dynamics are configured for specific spectral bands, then detection precision is improved, but adaptability to varied illumination conditions deteriorates
Solution Approach 1:
The system dynamically adjusts the integration time of each photodetector based on real-time illumination conditions. The synchronization circuit counts clock signal patterns and compares against stored thresholds to determine when to initiate or stop data acquisition phases, allowing each spectral band to adapt its integration duration to current lighting conditions rather than using fixed precise dynamics configuration.
Solution Approach 2:
The system changes the integration time parameter for each photodetector based on illumination conditions. By storing threshold values in registers and comparing clock signal counts against these thresholds, the system can modify the integration duration parameter dynamically, enabling adaptation to varied illumination while maintaining detection precision through optimized integration times for each spectral band.
3Measurement precision
If integration time is extended to capture more signal, then signal quality is improved, but noise accumulation increases
Solution Approach 1:
The system uses periodic reset operations controlled by the synchronization circuit. After each integration phase, the reset circuit periodically discharges the integration capacitor, preventing noise accumulation from extended integration. This periodic action allows the system to use longer integration times for better signal quality while periodically removing accumulated noise through synchronized reset operations based on clock signal pattern counting.
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 configuration enables the detection device to operate effectively in diverse illumination conditions by modulating the integration duration of each photodetector within a frame, improving signal quality and reducing noise by optimizing data acquisition and reset phases.
Implementation Method 1
a first photodetector sensitive to a first wavelength... a first reading circuit provided with a first integration capacitor connected to the first photodetector so as to store the electrical charges emitted by the first photodetector
Implementation Method 2
a second photodetector sensitive to a second wavelength... a second reading circuit provided with a second integration capacitor connected to the second photodetector so as to store the electrical charges emitted by the second photodetector
Data Source
Figure 1
Figure 2a~2e
Figure 3a~3e
AI summary
The multispectral detection device comprises first and second photodetectors (1a, 1b) sensitive to two different wavelengths. The two photodetectors are connected to two integrating capacitors in two separate readout circuits. Two reset circuits (5a, 5b) are configured to initialize the two integrating capacitors (3a, 3b) separately. A first synchronization circuit (7a) is connected to the first readout circuit (2a) and to the synchronization and clock signal generators (8, 9).The first synchronization circuit (7a) is configured to o define the frame by detecting a rising edge of the synchronization signal (SYNC), o count the number of occurrences of a falling edge of the clock signal (CLK), o initiate or stop a data acquisition phase when the number of occurrences of falling edges is equal to a threshold value recorded in a register (10) of the first synchronization circuit (7a).