Handheld Multispectral Imaging With Gimbal Stabilization For Crop Sensing
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Solution Overview
Problem
Existing handheld spectral imaging devices for crop growth monitoring face challenges in real-time registration and fusion of image and spectrum information due to view field differences and manual operation errors, leading to inaccurate crop growth characteristic interpretation.
Innovation Solution
A handheld snapshot multispectral imaging device with a three-axis gimbal and laser ranging sensor for precise angle and height control, combined with pixel-level coated filters and a detector, to collect and process crop image and spectrum information in four bands and channels, enabling real-time display of crop growth characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple lenses+multiple filters+multiple detectors optical-mechanical structure is used, then crop image and spectrum information can be collected, but instrument volume becomes large and data processing becomes complex
Solution Approach 1:
The patent combines multiple lenses, filters, and detectors into a single integrated spectral imaging sensor. The sensor uses a single lens with multiple spectral bands captured through a dispersive element, merging the functions of multiple separate components into one unified device that collects both crop image and spectrum information simultaneously
Solution Approach 2:
The spectral imaging sensor serves multiple functions: it captures spatial image information, spectral reflectance data, and geometric information from a single device. The sensor array detects multiple spectral bands (blue, green, red, red-edge) simultaneously while maintaining spatial resolution, eliminating the need for separate imaging and spectroscopy systems
2Quantity of substance
If handheld spectral imaging equipment with multiple bands is used, then rich data volume is obtained, but view field difference between lenses causes registration and fusion difficulty
Solution Approach 1:
The sensor array is segmented into multiple spectral bands (blue, green, red, red-edge) with each band detected by dedicated pixels. This segmentation allows each spectral channel to be captured simultaneously with consistent spatial geometry, eliminating view field differences that would occur with separate lenses for each band
Solution Approach 2:
The patent uses a dispersive element to split the incoming light into spectral components that are detected by corresponding pixels in the sensor array. This creates a direct optical copy of the spectral distribution across spatial positions, ensuring that image and spectrum information are captured with identical geometry and can be registered without complex fusion algorithms
3Ease of operation
If manual operation is used for positioning, then device portability is maintained, but monitoring height and angle accuracy deteriorates
Solution Approach 1:
The device incorporates a three-axis gimbal that automatically maintains optimal monitoring angle and height through active stabilization. The gimbal sensor system continuously monitors device orientation and adjusts positioning to compensate for manual operation variations, enabling the device to self-correct positioning errors while remaining portable
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 device achieves accurate collection, processing, and real-time display of crop growth multi-characteristic information, overcoming complexity and ensuring precise monitoring through reduced optical-mechanical structure and enhanced data integration.
Implementation Method 1
pixel level coated filters with central bands at 644 nm, 716 nm, 737 nm, and 813 nm
Implementation Method 2
imaging objective lens with focal length of 12 mm and field of view of 67°
Implementation Method 3
ranging sensor with measurement range of 4 to 400 cm and measurement accuracy of ±20 mm
Implementation Method 4
stability maintenance gimbal with pitch angle adjustment from −60° to +60°
Data Source
AI summary
A handheld snapshot multispectral imaging crop growth sensing device, including an imaging objective lens, a spectral imaging module, a main control module, a power supply module, a stability maintenance gimbal, a Red-Green-Blue (RGB) imaging module, a ranging sensor, a handheld rod, a control display, and a housing. The imaging objective lens is arranged below the housing. The spectral imaging module is arranged above the imaging objective lens. The main control module is arranged above the spectral imaging module. The stability maintenance gimbal is arranged above the housing. The stability maintenance gimbal is connected to the handheld rod. The RGB imaging module and the ranging sensor are arranged below the housing. The control display is fastened to the handheld rod. The power supply module supplies power to various modules.