Unmanned aerial vehicle (uav) inspection of a few points need to keep in mind

Solar photovoltaic (pv), a hot spot is now the most common problem, photovoltaic power station by uavs infrared thermal imaging device to hot spot inspection work, photovoltaic power station can save manpower cost, make inspection work efficiency greatly.

uav infrared hot spot detection mainly adopts the principle of thermal imaging, infrared thermal imager is invisible infrared energy coming from an object into a visible thermal image. Thermal image above different colors represent the different temperature of the object to be tested.

in normal circumstances, each cell of the uniform temperature distribution, thermal image color and uniform distribution, if there is a component of individual cells in the abnormal high temperature, will show the color difference, means that the battery problems, has been changed from normal state to load electric consumption, affect the conversion efficiency of the component.

photovoltaic power plant operations to the safe operation of the demand is higher and higher, in the process of using unmanned aerial vehicle (uav) for inspection, early for unmanned aerial vehicle (uav) in the use of photovoltaic power station is not perfect enough, highlights some problems to be solved.

the country released in August 2018 the world's first technical specification for the photovoltaic power station using unmanned aerial vehicle (uav) system test, lays the foundation for the application of the unmanned aerial vehicle (uav) in the photovoltaic industry. Specification according to the forms and application characteristics of photovoltaic power station, from safety, electromagnetic compatibility and flight performance of three main aspects, the components of unmanned aerial vehicle (uav) system, electrical safety, mechanical safety, protection, electromagnetic compatibility, data transmission capacity, flight parameters, functional testing, such as flight test project reached more than 70, including more than 30 of flight testing projects.

the weather is an important factor affecting the quality of unmanned aerial vehicle (uav) flight, including high irradiance is the necessary condition to obtain high-resolution images, as the sun radiation intensity is different, hot spot effect is obvious, morning, noon and afternoon would be a big temperature difference. Inspection of photovoltaic modules in sunny weather, is the best time to such as the Spring Festival, summer and early autumn, the season of irradiation is relatively strong, the temperature of the components is relatively high, so the phenomenon of hot spots is easy.

according to many years experience in renewable energy laboratory, unmanned aerial vehicle (uav) hot spot inspection recommend the ideal time is morning in the summer, there is no wind, irradiance for not less than 600 W/m2.

summer sunshine for a long time, if not in flight could capture the images of the ideal, also can fly again. In addition to operate as far as possible in the case of no wind, if may encounter in the process of flying to the wind, rain, etc. , will not only affect the orbit accuracy, also affects the detection power station picture effect, even may affect the flight safety of uav.

uav drivers must understand the impact of weather condition for unmanned aerial vehicle (uav), in accordance with the requirements of the variety of the light intensity of the day, choose the light strong period for unmanned aerial vehicle (uav) inspection time. Try to avoid flying in harsh conditions, put an end to accident due to weather conditions.

photovoltaic power station in the inspection plan, first of all must carry on the inspection early preparation, staff should consult the existing data of on-site investigation, determine to inspection the size of the photovoltaic power station, combined with the perspective of infrared thermal imager and resolution to determine the unmanned aerial vehicle (uav) flight altitude and infrared thermal imager single shooting area the size of the infrared image, thus planning, calculation and formulation of unmanned aerial vehicle (uav) flight path and hover photo position.

the inspection route in the photovoltaic power station are usually & other; S” Type and & other Z” Need to type, but the actual situation based on the analysis of the characteristics of power station, according to the array and topography distribution characteristics of targeted planning implementation.

drones checking flight height and decided to work the camera's field of view camera Angle, the imaging resolution of a torn solar panel from the influence of view area covered and panels, determines the efficiency and quality of the inspection work.

higher altitude increases, sloping field Angle can improve the field covers solar panels rows, but reduces the imaging resolution and fault judging quality of solar panels. Above the solar panels are flying high resolution imaging, can be directly determine the GPS coordinates of the fault points, high positioning accuracy, facilitate subsequent automatic identification and localization, but the inspection efficiency is low, suitable for high precision fine checking homework.

unmanned aerial vehicle (uav) for all the parts that consumes the largest part or batteries, lithium batteries, are now mostly used for carrying high resolution visible light and infrared thermal imaging camera, so will appear in the actual situation of life is short, so should pay attention to the usage of electricity, so as not to damage the machine.

in addition to avoid errors caused by charging failure, fire, still need to pay attention to when used in low temperature and high altitude & other; Warm & throughout; And & other Warm up & throughout; Work, improve the service life of the battery.

system of unmanned aerial vehicle (uav) as a highly integrated flight, except in the correct way of handling and use, also need for routine maintenance and inspection.

in the daily inspection of photovoltaic power station, although not required under the environment of rain, but still can't avoid work met the situation of the sudden rain, considering that as part of photovoltaic power station is built on the surface of the water, after use drivers need to dry immediately without electricity for unmanned aerial vehicle (uav), to determine the moisture.

in addition to consider the rain moisture, also need to consider the dust effect, especially used in photovoltaic power station in the desert of inspection of unmanned aerial vehicle (uav), should clean up as soon as possible after use, reduce dust for electronic components, especially the influence of the electrical equipment.