Technical of drone solar inspection

In recent years, with the completion of large-scale photovoltaic power plants, many tens of thousands of photovoltaic cells will fail during operation. At this time,  drone solar inspections are required. So what are the large-scale photovoltaic modules and external operation steps? Let me introduce you.

1. Use small drones to quickly establish orthophotos of inspection areas.
Use the function of selecting points on the aircraft map of the ground station to control the drone to fly along the edge of the field and perform fixed-point work. Plan the boundary of the exit station, that is, the boundary graphics required for aerial surveys. First, collect accurate geographic information of the region to provide the most basic ground information for subsequent UAV flight editing flights.

After completing the enclosure work, the ground station will automatically establish an aerial survey area to collect orthophotos. After editing the route parameters, confirm that the aircraft status (power, SD card capacity, mission completion actions, etc.) satisfies the collection requirements, and then the automatic flight mission can be executed.

In the process of collecting orthophotos, it is necessary to always pay attention to the remaining power of the drone and return to the flight in time. The photovoltaic panel equipment is densely distributed. At this time, the crash may cause relatively large losses. At the same time, the drone can automatically collect the orthographic image, and can use the GIS modeling software for the returned original photo.
Bentley (Smart3D), PIX4D, PhotoScan, etc., produce orthophoto results. At the same time of establishing the orthophoto, reasonably plan the time point and make a 5cm ground resolution real scene model for historical image data preservation and real scene data analysis, so as to be one of the basis for the later construction of the power station.

2. Refined inspection of UAV thermal infrared camera.
The use of wide-angle lenses is not recommended in the process of solar inspection. Practice shows that wide-angle lenses are risky when flying aircraft with too low altitude. Due to the camera resolution, too high a flying altitude may cause missed inspection defects. It is recommended that the infrared camera PTZ use a 13~19mm lens for fine inspection of photovoltaic panels.
After the thermal infrared pan/tilt camera and the visible light camera, the outdoor photovoltaic power generation panels are inspected, and some common causes of heating, such as sheet damage, shadow occlusion, surface fouling, and other hot spots, are identified and marked. The hot spot image can be clearly observed under the infrared image, and then switch to the visible light device to observe the faulty device close, and use the camera's own time stamp to record the detailed positioning information and shooting time.

In the post-processing of the finished photos, the original gray-scale infrared images can be enhanced with false colors through Flir Tools. Clearer marking and identification, while issuing related reports. Through image comparison and analysis, technicians found that some hot spots were caused by panel damage.

3. Geographical location management of photovoltaic panel defects. The pictures taken by the UAV's mid-thermal infrared camera and visible light camera contain POS information. Import the POS information into the orthophoto, and you can see where the defect picture was taken. Through image comparison, it can quickly and accurately determine which photovoltaic panels and components have faults and defects. It is convenient for the operation and maintenance personnel of the power station to replace faulty parts in time according to the actual operation and maintenance situation, and ensure the safe and stable operation of the parts.

The above is the content of the inspection of photovoltaic drones for everyone. The related applications and operation steps have also been introduced to you a lot. I hope to help you.

Industrial Drone for solar inspection

Wheelbase: 1000MM?? Height: 500MM
Frame Weight: 3.5KGS
Supply voltage: 6S
Motor: U8 KV150
Propeller: 28 inch propeller
Battery: 1 units 16000 mAh 22.2V?
Payload: 1-5KGS
Endurance: 50 minutes(without payload)

Industrial Drone frame

10X Optical Zoom Thermal Camera for solar instection

0X Optical Zoom Thermal Camera 320×240 IR with 3-axis Gimbal for multi-rotor UAV

10X Optical Zoom Thermal Camera TFIP10T3 is a zoom dual-light integrated system that integrates a 10x optical zoom camera, a thermal imager, a wireless image data transmission module, and a high-precision professional three-axis stabilization gimbal. The gimbal uses a high-precision encoder FOC control scheme with stable High-performance, small size, light weight, and strong features; visible light camera uses a low-illumination SENSOR with 4 million effective pixels; thermal imaging uses a 320×240 resolution detector with a baffle design. The system supports local TF storage, dual-channel simultaneous recording, pseudo-color switching, and temperature measurement. The ground station supports mouse control and multiple picture-in-picture modes. The sky side only needs power supply and connects the antenna. Note: The product includes ground receiving terminal and ground station software.

Voltage  3S or 6S(DC12V-26V)
Power Dynamic 12W
Characteristics Roll -45°~ +135°
Pitch -120~+120°
Yaw -150°~+150°
Pitch & Roll Accuracy ±0.02°
Yaw accuracy ±0.03°
One-button back to center One-button back to original position
Adjustable Gimbal Control speed Support angle and speed control

When the gimbal rotates, speed adaptation is performed based on the current speed mode and the multiple of the visible light camera.

TF Card Support 16G to 128G class10 TF card
Control method Support UART control and SBUS control
  Features HDMI picture-in-picture switching, pseudo color switching, temperature measurement
White light camera

Machine parameters

CMOS size 1/3 inch 4MP CMOS sensor
optical zoom 10x high-definition optical zoom lens, f=4.9 to 49mm
Focus time Real-time fast focusing function, focusing time <1S
Video output HDMI 1080P 60FPS, video stream local TF storage
Field of view (FOV) D : WIDE 66.6º±5% TELE 7.2º±5%

H : WIDE 53.2º±5% TELE 5.3º±5%

V : WIDE 39.8º±5%   TELE 4.2º±5%

Support mode 1080P 60fps
Thermal Imaging Resolution 320*240 pixel
Cell spacing 12μm
Types of Uncooled focal plane microbolometer
Wavelength range 8~14μm
Thermal sensitivity (NETD) ≤65mk@30℃
Contrast, brightness Adjustable
Angle of view 6.5mm lens, angle: 34.4 x 25.8
Measurement function Center point, highest temperature and lowest temperature display temperature function;
Overall size 108mm*150mm*180mm
working environment -10℃ to +45℃ / 20% to 80% RH