Urban street tree root system detection method based on ground penetrating radar technology
A technology of ground penetrating radar and detection method, which can be applied to measurement devices, radio wave measurement systems, reflection/re-radiation of radio waves, etc. , the detection results are accurate, the effect of eliminating interference
Pending Publication Date: 2022-07-22
NANJING FORESTRY UNIV
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[0003] With the rapid advancement of urban construction, such as subway expansion, road renovation, tree transplanting, etc., the site conditions of street trees are also directly or indirectly affected. To explore the impact of road space conditions on root health, it is necessary to use ground-penetrating radar technology to detect underground thick roots of street trees, but there are some problems in the detection of street tree roots. The hard pavement layer of urban roads will weaken the reflection signal of the root system in the lower area , this reduction effect will increase with the increase of the thickness of the road hard pavement layer; the condition of the underground space of the road is complex, the medium is not uniform, and there are many signal interference factors, such as gravel layers, bricks, backfilled construction waste, pipelines, The steel mesh will generate waveforms, which will interfere with the interpretation of root signals
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[0036] The present invention will be further illustrated below in conjunction with specific examples, which are implemented on the premise of the technical solutions of the present invention. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention.
[0037] Taking the detection of Fatong ZSNL(E)161, Zhongshan South Road, Nanjing City as an example, the Fatong is located on the east side of the north section of Zhongshan South Road. Rice, growing weak. There is a damage to the trunk, the length of the damaged part accounts for 10% of the circumference of the tree, the density of branches and leaves is medium, there are mild diseases and insect pests, and some bare roots appear, and the bare root area is 0.04m2. The comprehensive health grade evaluation of the method is 3, that is, the sub-health state. The Fatong tree pool is 1.5 meters wide and is paved with cobblestones. The sidewalk wh...
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The invention discloses an urban street tree root system detection method based on a ground penetrating radar technology, and belongs to the technical field of tree root system detection, and the method comprises the following steps: employing a first ground penetrating radar to carry out the circular scanning of a street tree root system through employing a circular scanning method; performing thick root detection point positioning on the root system of the border tree by using first ground penetrating radar software after circular scanning to obtain the number and distribution position information of thick roots; a second ground penetrating radar is used for carrying out linear scanning on the border tree root system through a grid scanning method; after linear scanning, second ground penetrating radar software is utilized to instantly generate depth slices after on-site scanning is finished, and coarse root distribution of different depth levels is obtained; and comparing the coarse root distribution results of the first ground penetrating radar and the second ground penetrating radar to confirm the distribution of street tree root systems. According to the invention, two kinds of ground penetrating radars are used, so that the detection result is more accurate and more persuasive; interference generated by an underground reinforcing mesh and pipelines is eliminated, and the device is suitable for being used in a complex urban road environment.
Description
technical field [0001] The invention belongs to the technical field of tree root system detection, in particular to a method for detecting the root system of urban street trees based on ground penetrating radar technology. Background technique [0002] Ground penetrating radar is a geophysical detection method to study the propagation law of ultra-high frequency short-pulse electromagnetic waves in underground media. When waves propagate in the medium, they will be reflected at the interface of bad geological bodies, and the electromagnetic wave will produce amplitude and phase at the sudden change of the interface. , frequency changes. The ground-penetrating radar system (6PR for short) is composed of a control computer, a radar control unit and a radar antenna. According to the frequency of the radar antenna, the detection depth and the minimum detection root diameter are also different. Generally, it can detect trees 5mm. For the above thick roots, due to the difference ...
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IPC IPC(8): G01S13/88G01S13/87
CPCG01S13/88G01S13/87
Inventor 尤心意刘琦张焕朝王艮梅
Owner NANJING FORESTRY UNIV