WIRIS Agro
Workswell WIRIS Agro R is the first device of its kind. Designed to map water stress across large areas, it has a critical role to play in the field of precision agriculture. The device facilitates the determination of the water stress value in a given stand of plants. This information may then be used to determine yield maps, optimize irrigation, and control water management remedies. In addition, the camera offers an LWIR band sensor with radiometric measurement and 10x optical zoom RGB camera with full HD (1920 x 1080 px) resolution for biomass cover index evaluation.
Crop Drought - Actual and Real Value
In 1981, the crop water stress index (CWSI) was developed as a normalized index to quantify water stress without interference from other environmental parameters affecting plant stress, such as temperature. In the dry season, precision farmers want to know the actual effect of drought on their crops. However, this can be difficult to measure. For example, crops may respond differently to drought if they have access to groundwater, and each plant has a different root system. These factors make it hard to tell how much a particular crop might be suffering during a given drought. That’s where the Workswell WIRIS Agro comes in. This thermal camera makes real-time measurements of the actual effects of drought on a crop.
Main WIRIS Agro R Applications
Although there are many uses, we can divide the main WIRIS Agro R functions into these four categories:
> Water status monitoring
Water stress is the plant's response to deficiencies in the water supply during the growing season, regardless of whether the crops are irrigated or not. To enhance monitoring, the AGRO creates special color maps, "Crop" and "CropStep."
> Irrigation management
This facilitates irrigation system optimization in terms of determining optimal locations for soil sensors, and in terms of structural optimization. The special color maps, "Water" and "WaterStep," are available for this use.
> Phenotyping
Plant varieties respond differently to the amount of water available to them. The WIRIS Agro R will help you determine how often the plants of a given species are in water stress, compared to plants of other species.
> Biomass Cover Index
For real-time calculation of the field's plant cover.
Specifications
WIRIS Agro key features description
CWSI onboard processingEvaluation of Crop Water Stress Index (CWSI) onboard in real-time
Operating onboard systemCWSI OS for full real-time data streaming and evalution during the flight
– operating system ensures the full access to all camera functions
– easy camera control via S.Bus, CAN bus, MavLink, RJ-45 or Trigger
Biomass cover index in %Real-time percentage calculation of the mass of the vegetation in RGB
WIRIS Agro specification
Sensor resolution640 x 512 pixels
Real-time CWSI evaluationWorkswell patented WIRIS Agro technology based on crop water stress index (normalized to value from 0 to 1) brings information about the crop stress and crop water management on large areas. The information can then be used to determine yield maps, manage irrigation or implement water management related remedies.
FPA active sensor size1.088 x 0.8705 cm
Type of sensorLWIR band sensor
CWSI evaluation range0 – 100% (100% means very stressed)
Temperature sensitivity0.03 °C (30 mK)
Field of view of the lens45°
Color maps4 color maps for CWSI and Water management evaluation
CWSI range settingsAutomatic or manual
CWSI digital zoom1 – 14x continuous
Software CorePlayerYes, included in the package 2 licenses
3D mapping SW compatibilityAgrisoft and Pix4D
10x Optical zoom digital visual camera
Resolution1 920 x 1 080 pixels (Full HD),
1/3” sensor,
Auto white balance,
Wide dynamic range,
Backlight compensation,
Exposure and Gamma control
Optical zoom10x optical zoom with vibration compensation
View angleUltra zoom 6.9° – extra wide 58.2°, focal 33.0 mm – 3.3 mm
Biomass cover indexCalculation of the index in real-time with Threshold function
FocusAutofocus with Direct Focus Zoom synchronization
Memory and data recording
Memory Internal high-speed SSD 128 GB for image and video recording
External slot for Micro SD card & USB 2.0 for USB stick for taking images
Image and video formatsCWSI JPEG images and Digital camera Full HD JPEG images
Digital camera h.264 encode video HD recording
Full-frame CWSI video recording (raw data recording)
GPS geo-tagging (image & video)
GPS tagging (image & video)MavLink or External GPS or DJI A3 controllers compatible via CAN bus
Interfaces & real-time remote control
10-pin digital portS.Bus
CAN bus (compatible with DJI M600 and A3 controllers)
MavLink
External GPS connectivity
External trigger
Ethernet (RJ-45) portVideo streaming and camera control (optional on request only)
Micro USB 2.0 portMass storage
Camera control and video streaming (optional on request only)
USB 2.0 portKeyboard connection for in-house WIRIS camera control
Remote control systemCWSI OS ensures real-time control of all camera functions during the flight
Remote control optionsS.BUS protocol
CAN bus for real-time control on DJI M600 and GPS geo-tagging
RJ-45 for wireless uplink installation (video streaming and camera control)
Protective filter on lensFilter protects the lens against external damage during the flight
Camera functionsMeasurement functions:
– online CWSI evaluation including 4 different color maps
– spot CWSI evaluation (Centre) with temperature information
– biomass index evaluation in percentage in real-time
Periodic capturing:
– capturing CWSI image, CWSI video and Visible image simultaneously
Camera modes visualizationPicture-in-Picture, Full Screen RGB with segmentation, Dual-screen
Micro HDMI video output1 280 x 720 pixels (720p), Aspect ratio 16:9, Micro HDMI video output
Software & SDK
Desktop softwareAdvanced Workswell CorePlayer for offline CWSI data analysis
Power supply, weight & dimensions
Input supply voltage9 – 36 VDC, Coaxial 2 x 6.4 mm, outer shell – GND
Power dissipation (avg.)12 W
Weight< 430 grams
Dimensions (L x W x H)83 mm x 85 mm x 68 mm
Mounting2 x 1/4-20 UNC thread (1x bottom side, 1x upper side)
Housing materialDurable aluminium body for long-time measurement stability
Environmental
Operating temperature range-10 °C to +50 °C
Storage temperature range-30 °C to +60 °C
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