Detection and Prediction of Internal Damage in the Ancient Timber Structure Based on Optimal Combined Model

Table 1

Parameters of test specimens.

Working condition	Damaged proportion	Simulation type	Tree species	Radius (mm)	Height (mm)	Moisture content (%)	Detected height (mm)
1	1/16	Hollow	Poplar (specimen 1)	115.4	100	9.4	50
2	1/8
3	1/4
4	1/32	Hollow	Elm (specimen 2)	111.5	100	8.7	50
5	1/16
6	1/8
7	1/4
8	1/2
9	1/32	Insect attacks	Poplar (specimen 3)	172.3	100	9.7	50
10	1/16
11	1/8
12	1/4
13	1/2
14	1/32	Insect attacks	Elm (specimen 4)	114.6	100	8.9	50
15	1/16
16	1/8
17	1/4
18	1/2