Design and Implementation of Automatic Wheat Mower Based on Smart Sensor Fed by a Photovoltaic
Table 1
The main components specification and characteristics of the system studied.
System
Element
Technical specifications
Price (US$)
Photovoltaic system
Flexible solar panels
35 crystal cell, max. power 68 W, average daily output 272 Wh/d, open circuit voltage 22 V, current at maximum power 3.67 A, short circuit current 3.80 A, and system voltage 12 V, 800 646 2 mm, 5.4 kg
1025
Charge control unit
Current at maximum power 8 A, system voltage 12 V, consumption value 4 mA, and dimensions 80 100 32 mm
58
Carrier system
Carrier vehicle
2200 Kv brushless motor, max 25.2 V, ESC 25.2 V 120 A, Servo Motor (6 Volt 12 kg torque) (770 470 290 mm)
1490
Remote control
2.4 GHz, 4-channel S-FHSS Computer radio system
382
Storage system
Lithium polymer battery
12.6 V, 5100 mAh, 40°C, 56.61 Wh.
372 (2 pcs)
Charger
Input voltage: 11–18 V DC charge power: max. 50 W, discharge power: max. 5 W, charge current range: 0.1–5.0 A, discharge current range: 0.1–1.0 A, current drain for balancing LiPo: 300 mAh/cell, LiPo/LiIo/LiFe battery cell count: 1–6 series, dimension: 135 125 34 mm and weight: 800 g
93
Smart sensor system
Sensor
Light source: infrared (850 nm), laser class: 1 (EN 60825-1 (2007–10)), eye-safe, field of view: 270°, scanning frequency: 15 Hz, angular resolution: 1°, and operating range: 0.05 m4 m Max. range with 10% reflectivity: 2 m Operating voltage: 10 V DC28 V DC, power consumption: type 3 W, without output load
884
Connection module
USB interface, input voltage: 10 to 30 V DC, power consumption 1 W, and “touch and teach”
93
Mowing system
Cutting equipment
Cutting edge width 160 mm Operating voltage: 10.8 V, rotation speed 1100 rpm, Dimension 330 172 135 mm, 1.1 kg
