Digital display type tree trunk strain detection device shaped like Chinese character'ji '

Abstract

The utility model discloses an n-shaped digital display type tree trunk strain detection device. The device comprises an n-shaped block, a resistance strain gauge, a strain acquisition module, a strain display module and a self-tapping screw. The self-tapping screw is connected with the n-shaped block and the trunk to be detected; the n-shaped block is a strain conversion element in an n-shaped design and is used for converting bending deformation of the tree trunk into bending deformation of the top of the n-shaped block; the resistance strain gauge detects the bending deformation of the outer side surface of the top of the n-shaped block; the strain acquisition module acquires the resistance value variation of the resistance strain gauge and converts the resistance value variation into a trunk strain value; and the strain display module is used for displaying the tree trunk strain value. The tree trunk strain detection device integrates structural design and data acquisition, conversion and display, can display tree trunk strain values in real time, facilitates field data acquisition and analysis, has the obvious advantages of convenience, real time and visualization, and provides reliable data support for tree health management and tree safety assessment work.

Description

Technical Field

[0001] The utility model relates to the technical field of non-destructive testing of forest trees, in particular to a digital display type tree trunk strain detection device. Background Art

[0002] Trees play a vital role in absorbing carbon dioxide, preventing soil erosion, beautifying the environment, and mitigating global warming. However, under extreme weather conditions such as storms, trees are prone to damage, such as trunk breakage and uprooting. This poses a serious threat not only to the trees themselves but also to surrounding buildings, transportation facilities, and human life and property. Therefore, tree safety assessments are crucial.

[0003] Trunk strain is a crucial parameter for assessing tree safety. The trunk is the tree's supporting structure, connecting to the roots downward and supporting the crown upward. Trunk strain refers to the deformation per unit length of the trunk during bending. By measuring trunk strain, it is possible to analyze the stress distribution and deformation patterns of trees under wind loads, snow loads, or other environmental stresses, thereby determining whether the tree is at potential risk of fracture or collapse. Accurate trunk strain monitoring is of great significance to tree health management and tree safety assessment, and also provides key data support for research on tree mechanical properties.

[0004] Existing methods for measuring tree trunk strain include the direct-attachment strain gauge method and the grating scale strain sensor method. The direct-attachment strain gauge method requires removing the bark down to the wood of the trunk, and then attaching the strain gauge to the surface of the wood. However, this method is more cumbersome when removing the bark and is difficult to control the depth of bark removal. It also requires a computer to collect and display strain data. Regarding the grating scale strain sensor method, the price of the grating scale strain sensor is relatively high, and the grating scale strain sensor generally also requires a computer to collect and display strain data. Therefore, it is necessary to provide a new technical solution to solve the problem that the trunk strain detection device is difficult to install and cannot directly display strain data. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a digital display type tree trunk strain detection device.

[0006] The utility model provides an "X"-shaped digital display tree trunk strain detection device, comprising: an "X"-shaped block, a resistance strain gauge, a strain acquisition module, a strain display module and a self-tapping screw; the self-tapping screw connects the "X"-shaped block and the tree trunk to be measured; the "X"-shaped block is an "X"-shaped strain conversion element with a U-shaped groove in the middle, comprising a top, an upper waist, a lower waist, an upper foot, a lower foot and a gasket; the gasket ensures that the "X"-shaped block fits tightly against the surface of the tree trunk, and when the trunk is bent and deformed, the upper waist, the upper foot and the lower waist, the lower foot generate relative displacement, converting the bending deformation of the trunk into the bending deformation of the top; the resistance strain gauge detects the bending deformation amount of the outer side surface of the top of the "X"-shaped block; the strain acquisition module acquires the resistance value change of the resistance strain gauge and converts it into the trunk strain value; the strain display module is used for displaying the trunk strain value.

[0007] By adopting the above-mentioned implementation method, the trunk strain detection device of the utility model combines structural design, data collection, conversion and display into one, which can display the trunk strain value in real time, facilitate on-site data collection and analysis, and has the obvious advantages of convenience, real-time and visualization, providing reliable data support for tree health management and tree safety assessment.

[0008] According to the utility model, a digital display trunk strain detection device in the shape of a figure "J" is provided. The top, upper waist, lower waist, upper foot and lower foot of the figure "J" block are named according to the installation position and geometric characteristics. The thickness of the figure "J" block is 10 mm. The top of the figure "J" block is fixedly connected to the resistance strain gauge, the upper waist is fixedly connected to the strain display module, and the lower waist is fixedly connected to the strain acquisition module. The upper foot and the lower foot are both provided with countersunk holes, which are clearance-matched with the self-tapping screws. The gasket has a certain height to compensate for the deviation caused by the uneven surface of the trunk to ensure that the figure "J" block is closely fitted to the surface of the trunk. When the trunk is bent and deformed, the U-shaped groove of the figure "J" block ensures that the upper waist, the upper foot and the lower waist, the lower foot produce relative displacement, and the trunk strain is converted into the bending deformation amount of the top.

[0009] According to the X-shaped digital display tree trunk strain detection device provided by the utility model, the self-tapping screw has an interference fit with the tree trunk and a clearance fit with the upper foot and the lower foot. The self-tapping screw accurately transmits the displacement caused by the bending deformation of the tree trunk to the upper foot and the lower foot of the X-shaped block.

[0010] According to the X-shaped digital display tree trunk strain detection device provided by the utility model, the resistance strain gauge is fixedly connected to the middle position of the top, and bending deformation of the top will cause the resistance value of the resistance strain gauge to change; the resistance value change of the resistance strain gauge is collected by the strain collection module.

[0011] According to a digital-display trunk strain detection device provided by the present invention, the strain acquisition module is fixedly connected to the surface of the lower waist portion, and is used to acquire the resistance change of the resistance strain gauge and convert the resistance change into a trunk strain value; the strain acquisition module is electrically connected to the resistance strain gauge and the strain display module; the strain acquisition module internally includes a Wheatstone bridge, an amplifier, an ADC, a microprocessor, a switch, and a memory; the strain acquisition module converts the resistance change of the resistance strain gauge into a voltage through the Wheatstone bridge, the voltage is amplified by the amplifier, and then the amplified voltage signal is converted into a digital signal through the ADC, and finally the acquired digital signal is converted into a trunk strain value through the microprocessor, the switch is used to start or end the detection task, and the memory is used to store the acquired trunk strain data; the trunk strain value obtained by the strain acquisition module is displayed on the display of the strain display module.

[0012] After the trunk generates trunk strain under the action of wind, the trunk strain is converted by the several-shaped blocks into the bending deformation of the top; the bending deformation of the top will cause the resistance value of the resistance strain gauge to change; the resistance value change of the resistance strain gauge can be converted into the trunk strain value by the strain acquisition module; the trunk strain value obtained by the strain acquisition module can be displayed on the display of the strain display module.

[0013] The utility model also provides an installation instruction of an X-shaped digital display tree trunk strain detection device, including: the tree trunk strain detection device is installed vertically on the tree trunk to be tested at a height of 1m from the ground. When the trunk is bent and deformed under the action of wind, the tree trunk strain detection device displays the trunk strain value in real time for on-site data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a structural diagram of a digital display type tree trunk strain detection device provided by the utility model;

[0016] Figure 2 This is a working principle diagram of the circuit system of a digital display tree trunk strain detection device provided by the utility model;

[0017] Figure 3This is a schematic diagram of the installation position of a digital display tree trunk strain detection device provided by the utility model on the surface of a tree trunk;

[0018] Figure 1 1. Block; 2. Self-tapping screws; 3. Strain acquisition module; 4. Resistance strain gauge; 5. Strain display module. 1-1. Upper leg; 1-2. Upper waist; 1-3. Lower waist; 1-4. Lower leg; 1-5. Gasket; 1-6. Top. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The following combination Figure 1 The utility model describes a digital display type tree trunk strain detection device.

[0021] like Figure 1 As shown, an embodiment of the utility model is a digital display type trunk strain detection device of an X-shaped structure, comprising: a X-shaped block (1), a resistance strain gauge (4), a strain acquisition module (3), a strain display module (5) and a self-tapping screw (2); the self-tapping screw (2) connects the X-shaped block (1) and the trunk to be measured; the X-shaped block (1) is an X-shaped strain conversion element with a U-shaped groove in the middle, comprising a top (1-6), an upper waist (1-2), a lower waist (1-3), an upper foot (1-1), a lower foot (1-4) and a gasket (1-5); the gasket (1-5) ensures that the X-shaped structure The block (1) is tightly fitted to the surface of the tree trunk. When the tree trunk is bent and deformed, the upper waist (1-2), the upper foot (1-1), the lower waist (1-3), and the lower foot (1-4) generate relative displacement, converting the bending deformation of the tree trunk into the bending deformation of the top (1-6); the resistance strain gauge (4) detects the bending deformation amount of the outer surface of the top (1-6) of the block (1); the strain acquisition module (3) acquires the resistance value change of the resistance strain gauge (4) and converts it into the trunk strain value; the strain display module (5) is used to display the trunk strain value.

[0022] Specifically, the top (1-6), upper waist (1-2), lower waist (1-3), upper foot (1-1), and lower foot (1-4) of the block (1) are named according to the installation position and geometric features. The thickness of the block (1) is 10 mm. The top (1-6) of the block (1) is fixedly connected to the resistance strain gauge (4), the upper waist (1-2) is fixedly connected to the strain display module (5), the lower waist (1-3) is fixedly connected to the strain acquisition module (3), the upper foot (1-1) and the The lower foot parts (1-4) are all provided with countersunk holes and are clearance-matched with the self-tapping screws (2); the gaskets (1-5) have a certain height to compensate for the deviation caused by the unevenness of the trunk surface, so as to ensure that the several-shaped blocks (1) are closely fitted with the trunk surface; when the trunk is bent and deformed, the U-shaped grooves of the several-shaped blocks (1) ensure that the upper waist part (1-2), the upper foot part (1-1) and the lower waist part (1-3), and the lower foot part (1-4) produce relative displacement, thereby converting the trunk strain into the bending deformation of the top part (1-6).

[0023] Furthermore, the self-tapping screw (2) forms an interference fit with the tree trunk and a clearance fit with the upper foot (1-1) and the lower foot (1-4), and the self-tapping screw (2) accurately transmits the displacement generated by the bending deformation of the tree trunk to the upper foot (1-1) and the lower foot (1-4) of the block (1).

[0024] Furthermore, the resistance strain gauge (4) is fixedly connected to the middle position of the top portion (1-6), and bending deformation of the top portion (1-6) causes the resistance value of the resistance strain gauge (4) to change; and the resistance value change of the resistance strain gauge (4) is collected by the strain collection module (3).

[0025] Furthermore, the strain acquisition module (3) is fixedly connected to the surface of the lower waist (1-3) to acquire the resistance change of the resistance strain gauge (4) and convert the resistance change into a trunk strain value; the strain acquisition module (3) is electrically connected to the resistance strain gauge (4) and the strain display module (5); the strain acquisition module (3) internally includes a Wheatstone bridge, an amplifier, an ADC, a microprocessor, a switch, and a memory; the strain acquisition module (3) converts the resistance change of the resistance strain gauge (4) into a voltage through the Wheatstone bridge, the voltage is amplified by the amplifier, and then the amplified voltage signal is converted into a digital signal through the ADC, and finally the collected digital signal is converted into a trunk strain value through the microprocessor, the switch is used to start or end the detection task, and the memory is used to store the collected trunk strain data; the trunk strain value obtained by the strain acquisition module (3) is displayed on the display of the strain display module (5).

[0026] After a trunk strain is generated under the action of wind, the trunk strain is converted by the several-shaped blocks (1) into the bending deformation of the top portion (1-6); the bending deformation of the top portion (1-6) causes the resistance value of the resistance strain gauge (4) to change; the resistance value change of the resistance strain gauge (4) can be converted by the strain acquisition module (3) into a trunk strain value; and the trunk strain value obtained by the strain acquisition module (3) can be displayed on a display of the strain display module (5).

[0027] Corresponding to the above embodiment of a digital display tree trunk strain detection device, the present invention also provides an embodiment of the installation instructions of the digital display tree trunk strain detection device. The invention includes: the tree trunk strain detection device is installed vertically on the tree trunk to be tested at a height of 1m from the ground (such as Figure 3 As shown), when the trunk bends and deforms under the action of wind, the trunk strain detection device displays the trunk strain value in real time for on-site data collection.

[0028] In the embodiment of the present invention, the trunk strain detection device of the present invention combines structural design, data collection, conversion and display into one, can display the trunk strain value in real time, facilitates on-site data collection and analysis, has the obvious advantages of convenience, real-time and visualization, and provides reliable data support for tree health management and tree safety assessment.

[0029] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A digital display tree trunk strain detection device, characterized in that: include: Strain gauges, strain gauges, strain acquisition modules, strain display modules and self-tapping screws; The self-tapping screws connect the several-shaped blocks and the trunk to be tested; The shaped block is an "X"-shaped strain conversion element with a U-shaped groove in the middle, comprising a top, an upper waist, a lower waist, an upper foot, a lower foot, and a gasket; the gasket ensures that the shaped block fits tightly against the surface of the tree trunk. When the trunk bends and deforms, the upper waist, the upper foot, the lower waist, and the lower foot produce relative displacement, converting the bending deformation of the trunk into bending deformation of the top; The resistance strain gauge detects the bending deformation of the outer side surface of the top of the several-shaped blocks; The strain acquisition module acquires the resistance change of the resistance strain gauge and converts it into a trunk strain value; The strain display module is used to display the trunk strain value.

2. The X-shaped digital display tree trunk strain detection device according to claim 1 is characterized in that: The top of the several-shaped block is fixedly connected to the resistance strain gauge, the upper waist is fixedly connected to the strain display module, and the lower waist is fixedly connected to the strain acquisition module. The upper foot and the lower foot are both provided with countersunk holes, which are clearance-matched with the self-tapping screws. The gasket has a certain height to compensate for the deviation caused by the uneven surface of the trunk to ensure that the several-shaped block fits tightly with the surface of the trunk; when the trunk is bent and deformed, the U-shaped groove of the several-shaped block ensures that the upper waist, the upper foot and the lower waist, the lower foot produce relative displacement, thereby converting the trunk strain into the bending deformation of the top.

3. The X-shaped digital display tree trunk strain detection device according to claim 2 is characterized in that: The self-tapping screw forms an interference fit with the tree trunk and a clearance fit with the upper foot and the lower foot. The self-tapping screw accurately transfers the displacement caused by the bending deformation of the tree trunk to the upper foot and the lower foot of the block.

4. The X-shaped digital display tree trunk strain detection device according to claim 2, characterized in that: The resistance strain gauge is fixedly connected to the middle position of the top, and bending deformation of the top will cause the resistance value of the resistance strain gauge to change; the resistance value change of the resistance strain gauge is collected by the strain collection module.

5. The X-shaped digital display tree trunk strain detection device according to claim 2, characterized in that: The strain acquisition module is fixedly connected to the surface of the lower waist, and is used to collect the resistance change of the resistance strain gauge and convert the resistance change into the trunk strain value; the strain acquisition module is electrically connected to the resistance strain gauge and the strain display module; the strain acquisition module internally includes a Wheatstone bridge, an amplifier, an ADC, a microprocessor, a switch, and a memory; the strain acquisition module converts the resistance change of the resistance strain gauge into a voltage through the Wheatstone bridge, the voltage is amplified by the amplifier, and then the amplified voltage signal is converted into a digital signal through the ADC, and finally the collected digital signal is converted into a trunk strain value by the microprocessor, the switch is used to start or end the detection task, and the memory is used to store the collected trunk strain data; the trunk strain value obtained by the strain acquisition module is displayed on the display of the strain display module.

6. The X-shaped digital display tree trunk strain detection device according to any one of claims 1 to 5 is vertically installed on the tree trunk to be tested at a height of 1 meter from the ground. When the trunk is bent and deformed under the action of wind, the trunk strain detection device displays the trunk strain value in real time for on-site data collection.

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