Lightning stroke risk early warning and eliminating method and system for ancient wood structure building

Abstract

The invention discloses a lightning stroke risk early warning and elimination method and system for a wood structure historic building, relates to the technical field of constructional engineering and lightning protection, focuses on protection and maintenance of the wood structure historic building, and particularly in the aspect of lightning protection. Judging the lightning stroke risk of the ancient wood structure building; and based on the judgment result, carrying out risk early warning and carrying out drying treatment on the wood structure historic building, so that the surface humidity of the wood structure historic building is reduced to a safety range of a humidity threshold value. The relative humidity of the surface of the wood structure ancient building is accurately measured, the resistance wire heating technology is used for keeping wood dry, the conductivity of the wood is reduced, and therefore early warning and elimination of the lightning stroke risk are effectively achieved.

Description

Technical Field

[0001] The present invention relates to the fields of construction engineering and lightning protection technology. Specifically, it relates to a lightning strike risk warning and elimination method and system for ancient wooden structures in ancient architecture. Background Art

[0002] As precious historical and cultural heritages, ancient buildings are threatened in many aspects, among which lightning disasters are one of the main natural disasters. Lightning can directly strike a building, causing physical damage, or affect electronic devices inside the building through electromagnetic pulses. For ancient wooden structures in ancient architecture, due to the flammability of wood, once struck by lightning, the consequences may be more serious. Therefore, how to effectively prevent or reduce the damage of lightning to ancient wooden structures in ancient architecture has become an important research direction.

[0003] The existing lightning protection measures for ancient wooden structures in ancient architecture mainly rely on the combination of metal lightning arresters, down conductors, and grounding grids to protect the wooden structure by guiding the current to flow into the ground through metal materials. However, experiments show that the electrical conductivity of wooden structures in a humid environment increases significantly during rainy weather, and the lightning strike risk increases greatly. Therefore, there are still lightning strike hazards during thunderstorms relying solely on traditional metal lightning protection devices. Summary of the Invention

[0004] To solve the above problems, the purpose of the present invention is to provide a lightning strike risk warning and elimination technology for ancient wooden structures in ancient architecture, aiming to accurately measure the relative humidity on the surface of ancient wooden structures in ancient architecture, and use the resistance wire heating technology to maintain the dryness of the wood, reduce its electrical conductivity, and thus effectively achieve the warning and elimination of lightning strike risks.

[0005] To achieve the above technical purpose, the present application provides a lightning strike risk warning and elimination method for ancient wooden structures in ancient architecture, including the following steps:

[0006] Collect the humidity of the wood of the ancient building and the humidity of the external environment, and judge the lightning strike risk of the ancient wooden structure in ancient architecture according to the set humidity threshold;

[0007] Based on the judgment result, conduct risk warning and dry the ancient wooden structure in ancient architecture to reduce the surface humidity of the ancient wooden structure in ancient architecture to the safe range of the humidity threshold.

[0008] Preferably, when judging the lightning strike risk of the ancient wooden structure in ancient architecture, predict the surface humidity of the ancient wooden structure in ancient architecture based on the humidity of the external environment, and judge the lightning strike risk of the ancient wooden structure in ancient architecture by collecting the humidity of the wood of the ancient building and according to the humidity threshold.

[0009] Preferably, when setting the humidity threshold, obtain the humidity threshold by analyzing the lightning strike risks of the ancient wooden structure in ancient architecture at different humidities.

[0010] Preferably, when drying a wooden structure ancient building, a metal brush is used for drying the wooden structure ancient building. The metal brush is installed on a robotic arm. When not in use, the metal wires are arranged in parallel at equal intervals, and the metal wires at adjacent points are respectively connected to the positive and negative poles of the power supply. Since no pair of metal wires is connected, the entire circuit is in an open state, and the metal brush does not generate heat. When the robotic arm controls the metal brush to approach and contact the wooden structure building body, due to the mismatch between the arc of its bottom plate and the surface arc of the wooden components of the ancient building, the metal brush is subjected to a tangential extrusion force that attenuates from the middle to both sides. The metal wires of the metal brush bend along the contact surface and come into contact, the heating circuit is turned on, and the heat generated by the metal brush is conducted to the building body, promoting the evaporation of moisture on its surface.

[0011] Preferably, when drying a wooden structure ancient building, according to the change of the humidity of the wood of the ancient building, the heating power is adjusted by controlling the distance between the bottom plate of the brush and the building body.

[0012] Preferably, when adjusting the heating power, according to the degree of contact between the metal brush and the building, the relationship between the extrusion force, current and the heating situation of the metal brush is obtained, and according to the extrusion force, the distance between the bottom plate of the brush and the building body is controlled.

[0013] Preferably, when drying a wooden structure ancient building, the metal brush is made of nickel-chromium alloy.

[0014] The present invention discloses a lightning strike risk warning and elimination system for a wooden structure ancient building, including:

[0015] A data acquisition and processing module for collecting the humidity of the wood of the ancient building and the humidity of the external environment, and judging the lightning strike risk of the wooden structure ancient building according to the set humidity threshold;

[0016] A risk warning and elimination module for carrying out risk warning and drying the wooden structure ancient building based on the judgment result, so that the surface humidity of the wooden structure ancient building is reduced to a safe range of the humidity threshold.

[0017] Preferably, the data acquisition and processing module is further used for predicting the surface humidity of the wooden structure ancient building based on the humidity of the external environment, collecting the humidity of the wood of the ancient building, and judging the lightning strike risk of the wooden structure ancient building according to the humidity threshold, wherein the humidity threshold is obtained by analyzing the lightning strike risk of the wooden structure ancient building at different humidities.

[0018] Preferably, the risk warning and elimination module is further configured to dry the ancient wooden structure buildings by controlling the metal brush. The metal brush is installed on the robotic arm. When not in use, the metal wires are arranged in parallel at equal intervals, and the metal wires at adjacent points are respectively connected to the positive and negative poles of the power supply. Since no pair of metal wires are connected, the entire circuit is in an open state, and the metal brush does not generate heat. When the robotic arm controls the metal brush to approach and contact the ancient wooden structure building, due to the mismatch between the arc of its bottom plate and the surface arc of the ancient wooden components of the building, the metal brush is subjected to a tangential extrusion force that decays from the middle to both sides. The metal wires of the metal brush bend along the contact surface and come into contact, the heating circuit is turned on, and the heat generated by the metal brush is conducted to the building body, promoting the evaporation of moisture on its surface.

[0019] The present invention discloses the following technical effects:

[0020] (1) In a humid thunderstorm environment, wood is prone to absorb moisture and form a conductive channel. The resistance wire heating system keeps the wood dry, reduces its conductivity, reduces the risk of lightning strike conduction, and improves the lightning resistance performance of ancient buildings.

[0021] (2) The humidity sensors are hidden in parts such as the roof, walls, and foundation. Compared with the existing lightning arrester - down conductor - grounding grid structure, it is more compact in volume, more convenient to install, and more concealed in position. It can avoid affecting the original appearance of ancient buildings.

[0022] (3) The adopted metal brush structure can enable full heat exchange between the heating conductor and the building body, avoid local overheating and causing coking of the wooden structure; the metal brush structure is simple and has a low manufacturing cost; the material used for the brush has good ductility and will not produce scratches on the building body; the closer the contact, the greater the heating power, realizing smooth regulation of the heating power, and having higher flexibility compared to the gear adjustment mode of general electrical appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of the lightning risk warning and elimination system for ancient wooden structure buildings of the present invention;

[0025] Figure 2 is an operation flow chart of each module of the lightning risk warning and elimination system for ancient wooden structure buildings of the present invention;

[0026] Figure 3 is a schematic diagram of the heating brush of the present invention;

[0027] Figure 4 This is the electrical wiring diagram of the heating brush described in the present invention. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part rather than all of the embodiments of the present application. Components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0029] As Figures 1-4 shown, the present invention provides a lightning strike risk warning and elimination method for ancient wooden-structure buildings, including the following steps:

[0030] Collect the humidity of the ancient building wood and the external environment humidity, and judge the lightning strike risk of the ancient wooden-structure building according to the set humidity threshold;

[0031] Based on the judgment result, conduct risk warning and dry the ancient wooden-structure building to reduce the surface humidity of the ancient wooden-structure building to the safe range of the humidity threshold.

[0032] Further preferably, for the lightning strike risk warning and elimination method for ancient wooden-structure buildings provided by the present invention, when judging the lightning strike risk of the ancient wooden-structure building, based on the external environment humidity, predict the surface humidity of the ancient wooden-structure building, and judge the lightning strike risk of the ancient wooden-structure building by collecting the humidity of the ancient building wood and according to the humidity threshold.

[0033] Further preferably, for the lightning strike risk warning and elimination method for ancient wooden-structure buildings provided by the present invention, when setting the humidity threshold, obtain the humidity threshold by analyzing the lightning strike risk of the ancient wooden-structure building at different humidities.

[0034] Further preferably, for a lightning strike risk warning and elimination method for ancient wooden structures, when drying the ancient wooden structures, the ancient wooden structures are dried by a metal brush. The metal brush is installed on a robotic arm. When not in use, the metal wires are arranged in parallel at equal intervals, and the metal wires at adjacent points are respectively connected to the positive and negative poles of a power supply. Since no pair of metal wires are in contact, the entire circuit is in an open state, and the metal brush does not generate heat. When the robotic arm controls the metal brush to approach and contact the ancient wooden building body, due to the mismatch between the arc of its bottom plate and the surface arc of the ancient wooden components of the building, the metal brush is subjected to a tangential extrusion force that attenuates from the middle to both sides. The metal wires of the metal brush bend along the contact surface and come into contact, turning on the heating circuit. The heat generated by the metal brush is conducted to the building body, promoting the evaporation of moisture on its surface.

[0035] Further preferably, for a lightning strike risk warning and elimination method for ancient wooden structures, when drying the ancient wooden structures, according to the change of the humidity of the ancient wooden structures, the heating power is adjusted by controlling the distance between the bottom plate of the brush and the building body.

[0036] Further preferably, for a lightning strike risk warning and elimination method for ancient wooden structures, when adjusting the heating power, according to the degree of contact between the metal brush and the building, the relationship between the extrusion force, current and the heating condition of the metal brush is obtained, and according to the extrusion force, the distance between the bottom plate of the brush and the building body is controlled.

[0037] Further preferably, for a lightning strike risk warning and elimination method for ancient wooden structures, when drying the ancient wooden structures, the metal brush is made of nickel-chromium alloy.

[0038] The present invention discloses a lightning strike risk warning and elimination system for ancient wooden structures, including:

[0039] A data acquisition and processing module for collecting the humidity of the ancient wooden structures and the external environmental humidity, and judging the lightning strike risk of the ancient wooden structures according to the set humidity threshold;

[0040] A risk warning and elimination module for carrying out risk warning and drying the ancient wooden structures based on the judgment result, so that the surface humidity of the ancient wooden structures is reduced to a safe range of the humidity threshold.

[0041] Further preferably, the data acquisition and processing module of a lightning strike risk warning and elimination system disclosed by the present invention is further used to predict the surface humidity of the ancient wooden structures based on the external environmental humidity, judge the lightning strike risk of the ancient wooden structures by collecting the humidity of the ancient wooden structures and according to the humidity threshold, and obtain the humidity threshold by analyzing the lightning strike risk of the ancient wooden structures at different humidities.

[0042] Further preferably, the risk warning and elimination module of a lightning strike risk warning and elimination system for ancient wooden buildings disclosed by the present invention is further configured to dry the ancient wooden buildings by controlling a metal brush. The metal brush is installed on a robotic arm. When not in use, the metal wires are arranged in parallel at equal intervals, and the metal wires at adjacent points are respectively connected to the positive and negative poles of a power supply. Since no pair of metal wires are connected, the entire circuit is in an open state and the metal brush does not generate heat. When the robotic arm controls the metal brush to approach and contact the ancient wooden building body, due to the mismatch between the arc of its bottom plate and the surface arc of the ancient wooden components of the building, the metal brush is subjected to a tangential extrusion force that attenuates from the middle to both sides. The metal wires of the metal brush bend along the contact surface and come into contact, turning on the heating circuit. The heat generated by the metal brush is conducted to the building body, promoting the evaporation of moisture on its surface.

[0043] Embodiment: The present invention provides a comprehensive and feasible lightning monitoring and risk elimination technology for ancient wooden buildings. Without adding traditional metal lightning protection devices, a humidity sensor, a microcomputer, and a resistance wire heating system are introduced. By setting lightning strike risk analysis programs and action programs for these devices, the defects of traditional metal lightning protection devices in rainy scenarios are overcome, and the damage to the original style of the building is reduced. At the same time, the resistance wire heating technology is used to maintain the wood at a lower moisture content state, reducing its electrical conductivity, thereby reducing the possibility of lightning current passing through the wood and solving the problem of lightning strikes on ancient wooden buildings from the source. The specific contents are as follows:

[0044] As Figure 1 shown, in this technology, it is specifically composed of three core parts: a humidity sensor module, a microcomputer module, and a resistance wire heating module.

[0045] Humidity sensor module: The TDK humidity sensor unit CHS series is adopted, including a humidity sensor device, a drive circuit, a linearized current, a temperature compensation circuit, and an output standardization circuit. It can monitor the subtle humidity changes of the ancient wooden building materials in real time and feedback humidity data to achieve rapid adjustment.

[0046] Resistance wire heating module: It is mainly composed of a Raspberry Pi MasterPi type trolley with a robotic arm and a metal brush with a certain arc, as Figure 3As shown in the figure. The metal brush is installed on the robotic arm, and its material is 0.1mm * 40mm Cr20Ni80 nickel-chromium alloy. When not in use, the metal wires are arranged in parallel at equal intervals, and the metal wires at adjacent points are respectively connected to the positive and negative poles of the power supply. At this time, since no pair of metal wires is in contact, the entire circuit is in an open state, and the metal brush does not generate heat. When the heating module receives the instruction issued by the microcomputer and the metal brush approaches and contacts the wooden structure building body, due to the mismatch between the arc of its bottom plate and the surface arc of the ancient building wooden components, the metal brush is subjected to a tangential extrusion force that attenuates from the middle to both sides. The metal wires of the metal brush bend along the contact surface and come into contact, the heating circuit is turned on, and the heat generated by the metal brush is conducted to the building body, promoting the evaporation of the moisture on its surface. The closer the brush contacts the building, the greater the extrusion force, the more pairs of contacts of the brush, the greater the current, and the more heat is generated. Therefore, controlling the distance between the bottom plate of the brush and the building body can smoothly adjust the power of the heating device. After the operation is completed, the brush is removed and the circuit is disconnected, and the metal wires return to parallel arrangement within the elastic limit.

[0047] Microcomputer module: Transmits real-time weather forecast, humidity and other monitoring data to the computer through 2G / 3G / 4G / 5G network. The microcomputer performs various intelligent algorithm analyses on the monitoring data and sends start / stop instructions to the resistance wire heating system.

[0048] The working mode designed by the present invention is as Figure 2 shown, and the specific process is as follows:

[0049] 1. Install TDK humidity sensor unit CHS series humidity sensors at high places such as wooden brackets and caissons to monitor the humidity of ancient building wood and the external environment humidity in real time. The humidity data is transmitted to the microcomputer through 2G / 3G / 4G / 5G network, and the humidity threshold is set at 15%.

[0050] 2. When the humidity sensor detects that the wood humidity exceeds 15%, the microcomputer performs various intelligent algorithm analyses and judgments and issues an instruction to start the resistance wire heating system.

[0051] 3. Evaporate the moisture on the wood surface through the heating brush controlled by the robotic arm, quickly raise the wood surface temperature, and keep it in a dry state. After the humidity drops below 15%, stop heating and enter the standby mode.

[0052] 4. If the wood humidity remains below 15% for 1 hour, turn off the heating system.

[0053] A lightning strike risk warning and elimination technology for ancient wooden structures proposed by the present invention adds a humidity sensor, a microcomputer, and a concealed resistance wire heating system on the basis of existing lightning protection technologies. This system can monitor the change of wood humidity in real time and download and analyze weather data online, so as to automatically activate the resistance wire heating system on rainy days to keep the wooden structure dry and reduce the lightning strike risk. The resistance wires are designed and installed on parts such as the roof, walls, and foundation. When the humidity exceeds the threshold, the system can quickly enable the heating function, reduce the moisture content of the wood, reduce conductivity, and enhance the lightning protection performance. At the same time, the layout of the resistance wires takes aesthetics into consideration to avoid affecting the appearance of ancient buildings. This method can not only reduce the lightning strike risk but also reduce the installation of metal lightning protection devices, thereby protecting the original appearance of the building.

[0054] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and the combination of processes and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks.

[0055] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0056] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A lightning strike risk warning and elimination method for ancient wooden structures, characterized in that, It includes the following steps: Collect the humidity of ancient building wood and the external environment humidity, and judge the lightning strike risk of the ancient wooden structure building according to the set humidity threshold; Based on the judgment result, conduct risk early warning and dry the ancient wooden structure building to reduce the surface humidity of the ancient wooden structure building to the safe range of the humidity threshold.

2. The method for lightning strike risk early warning and elimination for ancient wooden structure buildings according to claim 1, wherein: When judging the lightning strike risk of the ancient wooden structure building, based on the external environment humidity, predict the surface humidity of the ancient wooden structure building, and judge the lightning strike risk of the ancient wooden structure building by collecting the humidity of the ancient building wood and according to the humidity threshold.

3. The method for lightning strike risk early warning and elimination for ancient wooden structure buildings according to claim 2, wherein: When setting the humidity threshold, obtain the humidity threshold by analyzing the lightning strike risk of the ancient wooden structure building at different humidities.

4. The method for lightning strike risk early warning and elimination for ancient wooden structure buildings according to claim 3, wherein: When drying the ancient wooden structure building, use a metal brush to dry the ancient wooden structure building. Among them, the metal brush is installed on the robotic arm. When not in use, the metal wires are arranged in parallel at equal intervals, and the metal wires at adjacent points are respectively connected to the positive and negative poles of the power supply. Since no pair of metal wires is connected, the entire circuit is in an open state and the metal brush does not generate heat. When the robotic arm controls the metal brush to approach and contact the ancient wooden structure building body, due to the mismatch between the arc of its bottom plate and the surface arc of the ancient building wooden components, the metal brush is subjected to a tangential extrusion force that decays from the middle to both sides. The metal wires of the metal brush bend along the contact surface and come into contact, the heating circuit is turned on, and the heat generated by the metal brush is conducted to the building body to promote the evaporation of the surface moisture.

5. The method for lightning strike risk early warning and elimination for ancient wooden structure buildings according to claim 4, wherein: When drying the ancient wooden structure building, adjust the heating power by controlling the distance between the brush bottom plate and the building body according to the change of the humidity of the ancient building wood.

6. The method for lightning strike risk early warning and elimination for ancient wooden structure buildings according to claim 5, wherein: When adjusting the heating power, obtain the relationship between the extrusion force, current and the heating condition of the metal brush according to the contact degree between the metal brush and the building, and control the distance between the brush bottom plate and the building body according to the extrusion force.

7. The method for lightning strike risk early warning and elimination for ancient wooden structure buildings according to claim 6, wherein: When drying the ancient wooden structure building, the metal brush is made of nickel-chromium alloy.

8. A lightning strike risk warning and elimination system for ancient wooden structures, characterized in that, It includes: A data collection and processing module, which is used to collect the humidity of ancient building wood and the external environment humidity, and judge the lightning strike risk of the ancient wooden structure building according to the set humidity threshold; A risk early warning and elimination module, which is used to conduct risk early warning and dry the ancient wooden structure building based on the judgment result to reduce the surface humidity of the ancient wooden structure building to the safe range of the humidity threshold.

9. A lightning strike risk warning and elimination system for ancient wooden structures according to claim 8, characterized in that: The data acquisition and processing module is further configured to predict the surface humidity of the ancient wooden structure based on the external environmental humidity, judge the lightning strike risk of the ancient wooden structure by collecting the humidity of the ancient building wood and according to the humidity threshold, wherein the humidity threshold is obtained by analyzing the lightning strike risk of the ancient wooden structure under different humidities.

10. A lightning strike risk warning and elimination system for ancient wooden structures according to claim 9, characterized in that: The risk warning and elimination module is further configured to dry the ancient wooden structure by controlling a metal brush, wherein the metal brush is installed on a robotic arm. When not in use, the metal wires are arranged in parallel at equal intervals, and the metal wires at adjacent points are respectively connected to the positive and negative poles of the power supply. Since no pair of metal wires are connected, the entire circuit is in an open state and the metal brush does not generate heat. When the robotic arm controls the metal brush to approach and contact the ancient wooden building body, due to the mismatch between the arc of its bottom plate and the surface arc of the ancient building wooden component, the metal brush is subjected to a tangential extrusion force that attenuates from the middle to both sides, and the metal wires of the metal brush bend along the contact surface and come into contact, turning on the heating circuit. The heat generated by the metal brush is conducted to the building body, promoting the evaporation of surface moisture.

Images