Table 1 Core parameters of the device components
From: An automated method for stem diameter measurement based on laser module and deep learning
Module | Core parameters | Values |
|---|---|---|
Image sensor | Image size | 1920 × 1080 pixels |
Focal length | 6.00 mm | |
Image sensor type | CMOS | |
Vertical field of View | 60\(^\circ\) | |
Infrared filter | 980 nm Narrow Band | |
Price | $ 32.83 | |
Laser module | Wavelength | 980 nm |
Spot size | 3.00–30.00 mm | |
Output power | 300 mw | |
Angle of divergence | 1.05\(^\circ\) | |
Working distance | 0.05-30.00 m | |
Price | $ 27.07 | |
Development board | CPU | H2 Quad-core Cortex-A7 H.265/HEVC 1080P |
GPU | Mali400MP2 GPU @600MHz | |
Memory(SDRAM) | 512MB DDR3 | |
Power supply | 5V 3A | |
Price | $ 22.21 | |
Stepper motor | Actual rated input voltage | 3 V–5 V |
Speed | 15 RPM | |
Motor size | 16.0 mm * 12.0 mm * 9.9 mm | |
Price | $ 0.50 | |
GPS receiver | Voltage | 5 V |
Size | 48.0 mm * 35.0 mm * 13.5 mm | |
Receiving mode | GPS,BeiDou | |
Price | $ 3.50 | |
Touch screen | Resolution | 320*480 DOTS |
Interface | HDMI | |
Price | $ 8.26 | |
Acrylic sheet | Thickness | 2 mm |
Width | 300 mm | |
Length | 200 mm | |
Price | $ 0.56 | |
Battery | Capacity | 3000 mA |
Voltage | 5 V | |
Price | $ 9.07 |