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To solve the disadvantage of high cost and low efficiency in the traditional three-way crack detection methods, a three-dimensional crack change detection method based on binocular vision was proposed. Three-dimensional equivalent model of crack change was established, and the calculation of crack changes was equivalent to the calculation of changes between targets. Three-dimensional reconstruction of cracks was carried out through feature point code matching, spatial coordinate system transformation, three-dimensional coordinate calculation, and the three-dimensional situation of the fracture change was obtained. To verify the accuracy of the method, a unidirectional displacement test was carried out. The results show that the maximum measurement error of the opening and dislocation of the crack is within 0.2 mm, and the maximum measurement absolute error of settlement of the crack is within 0.3 mm, which meets the requirements for crack detection in technical specification for earth-rockfill dam safety monitoring.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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