A flange can also be a plate or ring to form
a rim at the end of a pipe when fastened to the pipe. A blind flange is a plate
for covering or closing the end of a pipe. A flange joint is a connection of
pipes, where the connecting pieces have flanges by which the parts are bolted
together.
Although the word flange generally refers to
the actual raised rim or lip of a fitting, many flanged plumbing fittings are
themselves known as 'flanges':
There are many
different flange standards to be found worldwide. To allow easy functionality
and interchangeability, these are designed to have standardised dimensions.
Common world standards include ASA/ASME (USA), PN/DIN (European), BS10
(British/Australian), and JIS/KS (Japanese/Korean). In the USA, ANSI stopped
publishing B16.5 in 1996, and the standard is ASME B16.5
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At present, Shanghai Bo Lei Intelligent Technology Co., Ltd. (hereinafter referred to as Bo Lei) uses the “M600†to carry out three-dimensional modeling projects for single-family villas and intensive construction sites with five-lens HD cameras. 
Single villa
Bo Lei engineers used the "M600" to carry out a full-scale wrap-around shooting of the Songjiang Villa with a five-lens high-definition camera. After the Bo Lei engineers made multiple transitions to complete the collection of model materials.
Before processing in the industry, refine the collected materials, eliminate the waste film caused by overexposure or other reasons, and retain useful photos as the final material for 3D modeling. 
The material is imported into the background processing software PIX4D for 3D reconstruction, and finally the overall model of the waters of the villa and its surrounding trees is obtained. 
Intensive construction site
Bo Lei engineers use the "M600", equipped with a five-lens HD camera to collect data according to the route planned by the ground station. Before the internal processing, the photos that meet the requirements are removed, and the modeling material is finally obtained. The material is imported into the post-processing software PIX4D, and the three-dimensional modeling process is performed to finally obtain a three-dimensional model of the plant. 
significance
This kind of tilting photography technology based on drones comprehensively perceives complex scenes in a wide range, high precision and high definition, and generates 3D data results with efficient data acquisition equipment and professional data processing flow, which can directly reflect the ground objects. The appearance, position, height and other attributes provide guarantee for real effects and accuracy of surveying level.
In order to adapt urban development to the needs of rapid economic development, the role of urban planning is increasingly evident. The tilt-based three-dimensional photography technology based on drones has obvious advantages in spatial data acquisition, and has become the most widely used surveying and mapping method in the construction of digital cities. It subverts the limitations of previous images that can only be shot from vertical scales. Equipped with multiple sensors on the same flight platform, it can capture images with multiple degrees of measurement, and can only truly reflect the ground conditions, and by using advanced positioning technology, embedding precise geographic information, enriching image information, and users. Introduce a true visual world that fits the human eye.
September 03, 2021