Artificial lightning-based termite positioning method for structural member

Abstract

A termite positioning method for a structural member based on artificial lightning comprises the following steps that (1) a small artificial lightning instrument and a decibel instrument are installed on a positioning trolley, and a spray point of the small artificial lightning instrument is perpendicular to the surface of the structural member; (2) starting the small-sized artificial lightning instrument and the decibel instrument, starting to discharge the discharge needle, and starting to display a discharge loudness decibel measurement value by the decibel instrument; and (3) the positioning trolley runs along the surface of the structural member, and when it is found that the shape of a discharge arc is changed into a trunk shape from a branch shape, the trunk is perpendicular to the surface of the structural member, and the decibel value of discharge loudness is reduced by not less than 12%, it is determined that termites exist in the structural member at the position. The method is scientific in design route, wide in application range and high in practicability.

Description

Technical Field

[0001] The invention relates to a method for locating termites in a structural component based on artificial lightning. Background Art

[0002] Termites are highly social insects that feed on wood and other organic materials, posing a serious threat to buildings. The main building materials that termites can corrode are: (1) Wood. Termites are most destructive to wood. They use the cellulose in wood as their main food source. By gnawing on the inside of the wood, they gradually weaken the structure of the wood, causing the wood and the building to lose their original strength and stability. (2) Steel and concrete. Although termites mainly feed on wood, they can also cause damage to building materials such as steel and concrete. Acidic substances such as formic acid secreted by termites can corrode steel and concrete, further exacerbating the damage to buildings. (3) Wires and pipes. Termites also pose a threat to infrastructure such as wires and pipes. They will chew on the insulation of wires, exposing the wires and increasing the risk of short circuits and fires. At the same time, termites will also corrode water pipes and drainage pipes, causing problems such as leaks and blockages. (4) Other organic materials. Termites may cause damage to other organic materials used in buildings. For example, wooden components used in interior decoration provide good food conditions for termites. Therefore, in order to protect the building structure and maintain the safety of the house, it is very necessary to carry out termite control on the building.

[0003] Termites are smart animals. Many structural components may appear intact on the surface, but the inside has been eaten away by termites. Therefore, the first step in termite control is to locate the termites and determine whether there are termites in the area.

[0004] At present, there are mainly the following termite detection technologies: (1) Video technology. Drill a hole in the structural component and insert an endoscope. Observation. The disadvantages of this method are: it is necessary to drill holes on the surface of the structural components continuously, which will damage the normal structural components. It is not possible to achieve targeted results and the workload is large. (2) Acoustic wave detection technology. The sound waves generated by termite activities are used to determine whether termites exist. The disadvantages of this method are: the accuracy is easily affected by environmental conditions, such as the vibration of structural components, background noise, material density, etc., which may lead to misjudgment or missed detection. (3) Microwave detection technology. Microwaves are emitted to penetrate the object being detected and the reflected microwaves are received at the same time. Due to the microwave Doppler effect, when there are termites in the object being detected, there is a slight difference between the emitted microwaves and the reflected microwaves, so the instrument responds. The disadvantages of this method are: the accuracy is easily affected by environmental conditions, such as hand shaking, wind, or human movement causing vibration of structural components, which will cause the instrument to respond, leading to misjudgment or missed detection. (4) Infrared thermal imaging technology. The termite activity environment must have a certain humidity, and the temperature of the area is usually different from the surrounding environment. In addition, termites will also generate a certain amount of heat when they swallow and digest. The presence of termites can be inferred through infrared thermal imaging. The shortcomings of this method are: there are many influencing factors, it is impossible to accurately locate, it can only be used as a preliminary judgment method, and other methods are often needed for verification. (5) Characteristic gas detection technology. Termite activities usually release carbon dioxide and midane. The sampling probe drills into the interior of the structural component to extract gas samples, and uses special instruments to detect the gas concentration, and then infers whether termites exist. The shortcomings of this method are: the probe needs to drill into the interior of the structural component, causing damage to the normal structural component, and it is impossible to achieve a targeted result. The workload is large, and this technology is rarely used.

[0005] In summary, various existing methods for locating termites in structural components have shortcomings, so it is necessary to invent new technologies. Summary of the invention

[0006] The invention proposes a method for locating termites in a structural component based on artificial lightning, which has reasonable design, accurate positioning, and is practical and convenient. The method can solve the shortcomings of various current methods.

[0007] The technical solution adopted by the present invention is: a method for locating termites in a structural component based on artificial lightning, comprising the following steps: (1) a small artificial lightning meter and a decibel meter are installed on a positioning vehicle, and the discharge needle of the small artificial lightning meter is perpendicular to the surface of the structural component; (2) the small artificial lightning meter and the decibel meter are started, the discharge needle begins to discharge, and the decibel meter begins to display the discharge loudness decibel measurement value; (3) the positioning vehicle runs along the surface of the structural component, and when it is found that the shape of the discharge arc changes from a twig shape to a trunk shape, and the trunk is perpendicular to the surface of the structural component, and the discharge loudness decibel value decreases by no less than 12%, it is determined that termites exist inside the structural component at this position.

[0008] Furthermore, the positioning trolley in step (1) is provided with a plane mirror and an observation hole; the plane mirror is arranged below the positioning trolley, perpendicular to the surface of the structural component, the distance between the plane mirror and the surface of the structural component is smaller than the distance between the discharge needle tip and the surface of the structural component, and the mirror surface faces the observation hole; the observation hole is arranged behind the positioning trolley, and the shape of the discharge arc between the discharge needle tip and the surface of the structural component can be seen by observing the plane mirror through the observation hole.

[0009] Furthermore, the small artificial lightning device in step (1) is made using the Tesla coil principle and is equipped with a discharge needle tip discharge, adjustable power, adjustable discharge frequency, adjustable distance between the discharge needle tip and the surface of the structural member, the discharge arc cannot ignite the structural member, and the discharge arc length is greater than the distance from the discharge needle tip to the termite.

[0010] Furthermore, the decibel value in step (3) is the average value of five consecutive decibel measurements, and the range of the five consecutive decibel measurements is no greater than 12 dB.

[0011] The beneficial effects of the present invention are as follows: (1) the discharge arc of a small artificial lightning device can penetrate structural components, the electrical conductivity of termites is greater than that of structural components, and the lightning energy absorbed by termites is much higher than that of structural components, so that the shape of the discharge arc can be easily changed from twigs to trunks, and the discharge loudness is reduced, and the design route is scientific; (2) it is a non-destructive testing method, which can penetrate a variety of structural components (such as wood, concrete, plastic pipes, etc.), has low attenuation, low requirements on environmental conditions, and a wide range of applications; (3) it does not require expensive testing equipment, and the required instruments and accessories are easy to purchase and process, which is of great promotion value; (4) it solves various shortcomings of existing methods and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of the present invention.

[0013] Figure 2 It is a front elevation schematic diagram of the present invention.

[0014] Figure 3 It is a schematic diagram of the discharge arc branches of the present invention.

[0015] Figure 4 It is a schematic diagram of the main trunk of the discharge arc of the present invention.

[0016] Figure 5 It is a picture of the small artificial lightning instrument of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all possible alternatives, improvements and equivalents within the scope of the claims.

[0018] Reference Figure 1-4 A method for locating termites in a structural component based on artificial lightning comprises the following steps: (1) a positioning vehicle 1 is equipped with a small artificial lightning meter 3 and a decibel meter 2, and a discharge needle 7 of the small artificial lightning meter 3 is perpendicular to the surface of a structural component 6; (2) the small artificial lightning meter 3 and the decibel meter 2 are started, the discharge needle 7 starts to discharge, and the decibel meter 2 starts to display the discharge loudness decibel measurement value; (3) the positioning vehicle 1 moves along the surface of the structural component 6, and when it is found that the shape of the discharge arc 9 changes from a twig shape to a trunk shape, and the trunk is perpendicular to the surface of the structural component, and the discharge loudness decibel value decreases by no less than 12%, it is determined that termites exist inside the structural component 6 at this position.

[0019] The step (1) of the present embodiment is to position the trolley 1, which is provided with a plane mirror 8 and an observation hole 4; the plane mirror 8 is arranged below the positioning trolley 1, perpendicular to the surface of the structural member 6, the plane mirror 8 is 20 mm away from the surface of the structural member 6, and the mirror surface faces the observation hole 4; the observation hole 4 is arranged behind the positioning trolley 1, and through the observation hole 4, by observing the plane mirror 8, the shape of the discharge arc 9 between the tip of the discharge needle 7 and the surface of the structural member 6 can be seen.

[0020] In step (1) of this embodiment, the structural member 6 is a wooden column.

[0021] The small artificial lightning device 3 in step (1) of this embodiment is made using the Tesla coil principle and is equipped with a discharge needle 7 tip discharge, power 0-120w, discharge frequency 5-50Hz, the distance between the discharge needle 7 tip and the surface of the structural member 6 is 25mm, the discharge arc 9 cannot ignite the wooden column, and the length of the discharge arc 9 is 0-150mm, which is greater than the distance from the discharge needle 7 tip to the termite 5.

[0022] The decibel value in step (3) of this embodiment is reduced by 14%. The calculation process is as follows: (1) The decibel value at the position where no termites exist inside the structural member 6 = (82+90+88+91+85) / 5 = 87dB, and the range of 5 consecutive decibel measurements = 91-82 = 9dB < 12dB; (2) The decibel value at the position where termites exist inside the structural member 6 = (73+81+70+77+74) / 5 = 75dB, and the range of 5 consecutive decibel measurements = 81-70 = 11dB < 12dB; (3) The decibel value reduction = (87-75) / 87 = 14%.

Claims

1. A method for locating termites in structural components based on artificial lightning, characterized in that: The method comprises the following steps: (1) installing a small artificial lightning meter and a decibel meter on a positioning vehicle, with the discharge needle of the small artificial lightning meter perpendicular to the surface of the structural member; (2) starting the small artificial lightning meter and the decibel meter, the discharge needle starts to discharge, and the decibel meter starts to display the discharge loudness decibel measurement value; (3) the positioning vehicle moves along the surface of the structural member, and when it is found that the shape of the discharge arc changes from a twig shape to a trunk shape, and the trunk is perpendicular to the surface of the structural member, and the discharge loudness decibel value decreases by no less than 12%, it is determined that termites exist inside the structural member at that location.

2. The method for locating termites in a structural member based on artificial lightning according to claim 1, characterized in that: The step (1) is to position the trolley, which is provided with a plane mirror and an observation hole; the plane mirror is arranged below the positioning trolley, perpendicular to the surface of the structural component, the distance between the plane mirror and the surface of the structural component is smaller than the distance between the discharge needle tip and the surface of the structural component, and the mirror surface faces the observation hole; the observation hole is arranged behind the positioning trolley, and the shape of the discharge arc between the discharge needle tip and the surface of the structural component can be seen by observing the plane mirror through the observation hole.

3. The method for locating termites in a structural member based on artificial lightning according to claim 1, characterized in that: The small artificial lightning device in step (1) is made using the Tesla coil principle and is equipped with a discharge needle tip discharge, adjustable power, adjustable discharge frequency, adjustable distance between the discharge needle tip and the surface of the structural member, the discharge arc cannot ignite the structural member, and the discharge arc length is greater than the distance from the discharge needle tip to the termite.

4. The method for locating termites in a structural member based on artificial lightning according to claim 1, characterized in that: The decibel value in step (3) is the average value of five consecutive decibel measurements, and the range of the five consecutive decibel measurements is no greater than 12 dB.

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