Multi-Tap Detection Unit Signal Deviation Correction
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Solution Overview
Problem
Existing detection units face challenges in achieving high-precision and fast detection for multiple targets due to signal deviations between different taps in multi-tap structures, which affect image acquisition and distance measurement accuracy, especially in applications requiring high frame rates and dynamic range.
Innovation Solution
A detection unit comprising a photosensitive module, processing module, and two circuits that convert light into electrical signals, allowing for intelligent selection and processing of signals with the same or different phases, enabling accurate information acquisition and high frame rate output through independent or adaptive control of modulation signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-tap structure is used to improve detection efficiency and chip integration, then productivity and device complexity are improved, but signal deviation between different taps increases, worsening measurement precision
Solution Approach 1:
The patent implements a feedback mechanism by measuring the deviation between signals from different taps and using this information to correct subsequent measurements. The system continuously monitors the consistency of responses from multiple taps and applies correction factors to compensate for deviations, thereby maintaining high detection efficiency while improving measurement precision.
Solution Approach 2:
The patent changes the parameters of the detection system by introducing variable exposure durations for different taps and dynamically adjusting integration times. This allows the system to optimize the contribution of each tap based on its individual performance characteristics, reducing the impact of signal deviations while maintaining high productivity through parallel processing.
2Measurement precision
If multiple phase data acquisition is implemented to improve distance measurement accuracy, then measurement precision is improved, but exposure time increases, worsening productivity
Solution Approach 1:
The patent employs periodic action by using phase-modulated light signals and acquiring data at multiple phase points (0°, 90°, 180°, 270°) within a single modulation period. This allows the system to obtain multiple phase data sets without requiring multiple complete exposure cycles, thereby maintaining high frame rates while achieving accurate distance measurements through phase difference calculations.
Solution Approach 2:
The patent ensures continuity of useful action by overlapping the acquisition of different phase data during a single continuous exposure period. Instead of performing separate exposures for each phase, the system continuously collects data while modulating the light source and sensor at different phases, eliminating idle time between measurements and maintaining high productivity.
3Measurement precision
If different exposure durations are used for different phases to optimize detection, then measurement precision is improved, but device complexity increases, worsening ease of operation
Solution Approach 1:
The patent introduces dynamic control by allowing exposure durations to vary based on the detected scene requirements. The system can adaptively adjust the exposure time for different phases and different taps according to the ambient light conditions and target reflectivity, optimizing detection precision without requiring manual configuration. This dynamic adaptation is controlled through automated algorithms that simplify the user interface.
Solution Approach 2:
The patent implements universality by designing a control system that can automatically select and apply appropriate exposure durations for different phases and taps based on the detection task requirements. The same hardware infrastructure supports both fixed and variable exposure modes, as well as different phase acquisition strategies, making the device versatile and easy to operate across various application scenarios without requiring complex manual setup.
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 solution enhances detection accuracy by processing signals from different phases to improve image or distance measurement quality and ensures quick, accurate information output, particularly in dynamic environments, such as autonomous driving, by minimizing signal deviations and optimizing exposure durations.
Implementation Method 1
a photosensitive module 130... configured to convert incident light into an electrical signal
Data Source
AI summary
A measurement pixel unit, and a measurement apparatus and a measurement method using same. The measurement apparatus comprises a light source that can be operated to emit light so as to illuminate a measured object; a photosensitive module may output an electrical signal by means of a first circuit receiving a first modulation signal and a second circuit receiving a second modulation signal; a processing module may receive different control signals to perform control, and thus may work at different modes in a measurement system; the two circuits can separately output the electrical signal corresponding to the phase delay of one of delay phase reception control signals, thereby achieving the accuracy of measurement information; moreover, the system further can perform reasonable arrangement on phase delay information and exposure duration information in a sub frame at a certain frame rate mode, thereby ensuring the high efficiency of the whole system.