JP2997764B2 - Non-destructive inspection equipment for tree decay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nondestructive inspection device for tree decay.

[0002]

2. Description of the Related Art Trees, especially trees planted on roads, fall down due to typhoons and cause accidents due to large trees and aging. In order to prevent this, it is necessary to investigate the health of trees.
By the way, as a cause of the tree falling down as mentioned above,
(1) Defective growth of the root system due to poor planting base, and reduced root supporting strength due to root system cutting due to surrounding construction, etc. (2) Trees are eroded by wood rot fungi and sponge inside, Cavitation and loss of support strength.

Among these causes, regarding the cause (1), the support strength of the tree can be grasped to some extent by investigating the vitality of the tree and the like, but the cause cannot be accurately grasped. Regarding, even if the wood decay is progressing, it is difficult to show it in the tree shape and the vitality of the branches and leaves, and the growth of the above-ground part is often good.
It is difficult to diagnose by the appearance unless there is a clear symptom such as the decay of the trunk or the hollow can be seen in the trunk of the tree, or the occurrence of fungi fruiting bodies (mushrooms) at the root or the trunk. There is a problem.

[0004]

In order to solve such a problem, a method of diagnosing the presence or absence of decay and the amount of decay usually by measuring the transmission speed of the vibration wave at the root and the trunk and the penetration resistance of the wood. Has been adopted. However, such an inspection method has problems that the tree is damaged in the inspection process, the amount of decay cannot be accurately grasped, and the inspection work is not easy.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the various conventional inspection methods as described above, and to accurately grasp the amount of decay without damaging trees during the inspection process. Another object of the present invention is to provide a non-destructive inspection device for tree decay that can be easily inspected.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a nondestructive inspection system for tree decay, which measures the radiation source and the amount of radiation transmitted from the radiation source through the tree. And a radiation detecting means to be arranged, at the same time, the outer periphery of the tree to be inspected is disposed so as to be able to move in parallel at positions facing each other with the tree to be inspected interposed therebetween. The amount of transmitted radiation is measured, and the distance between the radiation source and the radiation detecting means obtained by this measurement, the type of tree, and the measured value for each type of wood are used as reference values, and the radiation measured by the radiation source and the radiation detecting means is used as a reference value. Means for inputting measured values in the inspection tree, data conversion of these reference values and measured values of the tree to be inspected, measurement data of the tree to be inspected input from the data conversion means,
Data processing means for determining the degree of decay of the inspected tree by comparing the measured data with the healthy tree is provided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention shown in FIGS. 1 and 2 is a so-called simple inspection method for linearly inspecting the degree of decay of a tree. A radiation source 3, a radiation detecting means 4, and a tree decay determining means 4 are shown. When inspecting the decay state inside the tree 1 in such a case, prior to the inspection, the radiation source 2 and the radiation detecting means 3 of the same kind of healthy tree as the tree 1 to be inspected face each other with the tree 1 interposed therebetween. It is fixed at a position, and the transmission amount of the radiation emitted from the radiation source 2 is measured by the radiation detection means 3, and the distance (the trunk width) between the radiation source 2 and the radiation detection means 3, the tree species, and the woody (density) Etc.) are set in the tree rot determining means 4 as a reference value.

Thereafter, as shown in FIG. 1, the radiation source 2 and the radiation detecting means 3 are fixed to the tree 1 in the same manner as described above, and the amount of radiation transmitted from the radiation source 2 is measured by the radiation detecting means 3 as shown in FIG. The measured value is input to the tree decay determining means 4 and is compared with a reference value set therein to determine the degree of tree decay of the tree 1 to be inspected linearly.

The second embodiment of the present invention shown in FIGS. 3 and 4 is a so-called precision inspection method for inspecting the degree of decay of a tree two-dimensionally. The data converting means 6 is connected to a data processing means 7 such as a personal computer.
When inspecting the decay state inside the tree 1 in such a case, prior to the inspection, a radiation source 2 and a radiation detection means 3 are used for a healthy tree of the same kind as the tree 1 to be inspected.
Are simultaneously moved in parallel on the outer circumference of the tree 1, and the amount of transmission of radiation from the radiation source 2 is measured by the radiation detecting means 3 in the same manner as in the first embodiment. The distance between them (the trunk width) and the measured value for each tree species and wood type (density, etc.) are input to the data processing means 7 via the data conversion means 6 and set.

After that, as shown in FIG. 3, the radiation source 2 and the radiation detecting means 3 are simultaneously moved on the outer periphery of the tree 1 in the same manner as in the first embodiment, as shown in FIG. The amount of transmission of radiation from the radiation source 2 is measured by the radiation detection means 3, and the measured value is input to the data processing means 7 via the data conversion means 6 and compared with a reference value set therein. Thus, the degree of tree decay of the tree 1 to be inspected is determined two-dimensionally.

[0011]

According to the present invention, as described above, in a nondestructive inspection apparatus for tree decay, a radiation source and radiation detection means for measuring the amount of radiation transmitted from the radiation source through the tree are provided. At the same time, the perimeter of the tree to be inspected is placed so as to be able to move in parallel at positions facing each other across the tree to be inspected. The distance between the radiation source and the radiation detection means obtained by this measurement, the type of tree, and the measured value for each type of wood are used as reference values, and the measured values for the inspected tree are input. And data processing means for comparing the measured tree measurement data inputted from the data conversion means with the healthy tree measurement data to determine the degree of tree decay of the tree to be inspected. And transmits the radiation to a healthy tree of the same species as the tree under inspection, measures the amount of transmission of this radiation, uses the measured value as a reference value, transmits the radiation to the tree under inspection, and determines the amount of transmission of this radiation. Since the measured value is compared with the reference value to determine the degree of tree decay of the inspected tree, it is possible to accurately grasp the amount of decay without damaging the tree during the inspection process. In addition, there is an effect that inspection work is easy.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the first embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 in FIG.

FIG. 3 is a front view showing an embodiment of a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line 4-4 of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tree 2 Radiation source 3 Radiation detection means 4 Tree decay determination means 6 Data conversion means 7 Data processing means

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-52-128190 (JP, A) JP-A-59-151943 (JP, A) JP-A-2-88950 (JP, A) 169802 (JP, U) Japanese Utility Model Showa 62-1157 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 23/02-23/18

Claims (1)

(57) [Claims] 1. A radiation source and a radiation detecting means for measuring the amount of radiation of radiation emitted from the radiation source through a tree are provided so as to be able to simultaneously translate the outer periphery of the tree to be inspected at a position opposed to the tree to be inspected. Arrange and measure the tree to be inspected measured by the radiation detection means, the amount of radiation transmission of the same kind of healthy trees, the distance between the radiation source and the radiation detection means obtained by this measurement, tree species, Means for inputting the measured values of the inspected tree measured by the radiation source and the radiation detecting means with the measured value of each wood as a reference value, and converting the reference value and the measured value of the inspected tree into data; Data processing means for comparing the measured tree measurement data input from the conversion means with the healthy tree measurement data to determine the degree of tree decay of the tested tree is provided. Non-destructive inspection equipment for tree decay.