Hand Dorsum Vein Lock Recognition Under Outdoor Light
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Solution Overview
Problem
Existing intelligent locks face issues with fingerprint contamination, high power consumption, poor height compatibility, and outdoor light interference, making them inconvenient and insecure for users, especially the elderly and children.
Innovation Solution
An intelligent lock utilizing a hand dorsum vein recognition module that acquires images obliquely downward, employs narrow-band near-infrared wavelengths to resist outdoor light interference, and uses ergonomic design for easy user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fingerprint recognition is used for quick unlock, then ease of operation is improved, but reliability deteriorates due to contamination and security risks
Solution Approach 1:
The patent extracts the vein recognition function from the contaminated fingerprint surface by illuminating the finger with specific wavelengths of light (405nm-450nm) to make veins visible through the translucent finger, thereby separating the identification target (veins) from the contaminated surface (fingerprint ridges)
Solution Approach 2:
The patent changes the illumination parameter by using specific wavelength ranges (405nm-450nm for vein illumination, 630nm-680nm for palm print suppression) to enhance vein visibility while suppressing interfering signals, thereby improving recognition reliability under various lighting conditions
2Ease of operation
If face recognition module is used for unlock, then ease of operation is improved, but use of energy deteriorates due to high power consumption
Solution Approach 1:
The patent replaces the high-power face recognition module with a low-power vein recognition system that uses LED illumination at specific wavelengths (405nm-450nm) combined with optical filtering, achieving similar authentication functionality with significantly reduced power consumption
3Measurement precision
If face recognition or palm vein recognition is used, then recognition function is improved, but reliability deteriorates due to outdoor light interference
Solution Approach 1:
The patent changes the optical parameter by using specific wavelength ranges (405nm-450nm for vein illumination, 630nm-680nm for palm print suppression) combined with corresponding optical filters to enhance vein visibility while suppressing interfering signals from outdoor light, thereby improving recognition reliability in outdoor environments
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
The intelligent lock provides enhanced ease of use, improved recognition accuracy, and reduced power consumption by leveraging hand dorsum vein recognition, which is less prone to contamination and interference, thus enhancing user experience.
Implementation Method 1
the imaging unit is configured to acquire an image of a hand dorsum vein of a target subject... the light source emits light of a predetermined wavelength; preferably, the predetermined wavelength belongs to a near-infrared wavelength range
Implementation Method 2
the light source emits light of a predetermined wavelength; preferably, the predetermined wavelength belongs to a near-infrared wavelength range; more preferably, the light source is a light emitting diode
Data Source
AI summary
An intelligent lock and use method thereof is provided, where the intelligent lock includes a lock body, a main controller, a hand dorsum vein recognition module and a lock drive module; the main controller is connected to the hand dorsum vein recognition module and the lock drive module; the lock drive module is further connected to the lock body; the hand dorsum vein recognition module is configured to acquire an image of a hand dorsum vein of a target subject at a predetermined angle obliquely downward and recognize the image, so as to obtain target vein feature data; the main controller is configured to match the target vein feature data with recorded vein feature data to obtain a matching result; the matching result comprises successful match and failed match; the lock drive module is configured to drive the lock body to unlock in case of successful match.