A display device integrating a plurality of electromagnetic devices

Abstract

The utility model provides a kind of demonstration device of integrated multiple electromagnetic equipment, including ground, guardrail, the edge of the top surface of the ground is fixedly connected with a circle guardrail, the top of the ground is fixedly connected with static induction device, the static induction device includes static electricity generating device, insulating platform and grounding system, the audience area of the static induction device is from platform edge ≥2 meters, operator is from equipment ≥0.7 meter;The top of the ground is fixedly connected with Jacob ladder device.The utility model has the advantages of: accurate realization electromagnetic phenomenon visual and interactivity;Realized the visualization of electromagnetic phenomenon;Meanwhile, part of device, such as music Tesla device supports mobile phone / computer connection to carry out audio input, enhances the interactivity with audience, provides immersive scientific experience for audience;Build multilevel risk prevention and control system to ensure safety: from personnel safety protection and equipment reliability protection two aspects to build perfect risk prevention and control system.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic display equipment, especially a display device integrating multiple electromagnetic devices. BACKGROUND

[0002] The electromagnetic grand stage is a comprehensive technical system integrating the principle of electromagnetism and stage art, and its core is to create a shocking visual and auditory effect through high-voltage discharge, magnetic field regulation and other means. High-voltage electromagnetic phenomena (such as electrostatic induction, gas discharge, electromagnetic shielding, etc.) are important content in physics, and are widely used in scientific research, industry and popular science education fields. Science and technology museums, museums and other places often display such phenomena to the public to convey scientific principles and improve scientific literacy. Traditional electromagnetic demonstration devices are usually presented in the form of independent exhibits, such as "rage" electrostatic generators, Jacob's ladder, Faraday cages, Tesla coils and surface discharge devices. These devices have certain display effects, but still have the following problems: First, the safety is insufficient. High-voltage equipment is prone to electric arc, ozone and electromagnetic radiation during operation, which poses the risk of electric shock, fire, etc. The existing exhibits often lack a systematic safety protection system, such as lack of effective isolation, non-standard grounding, lack of emergency mechanism, etc., which makes it difficult to ensure the safety of both operators and audiences, especially in crowded public places.

[0003] Second, the display form is single and the experience is poor. Most devices are independent in function, lack of linkage and overall narrative, and the display process is mainly static or manual operation, making it difficult to achieve automation and immersive experience. For example, the traditional Tesla coil only demonstrates discharge, but lacks coordination with sound, light and other multimedia, which weakens the appeal and interactivity.

[0004] Third, the reliability is low and the maintenance cost is high. High-voltage equipment is sensitive to working environment (such as temperature and humidity), and the existing exhibits lack perfect overcurrent and overvoltage protection, heat dissipation and electromagnetic compatibility design, resulting in high failure rate and short service life. At the same time, the scattered arrangement of devices also increases the complexity of operation management and maintenance.

[0005] Fourth, the artistry and scientificity of modern exhibition are not fully considered. Many exhibits only focus on function implementation, ignoring visual performance and spatial experience, such as unreasonable planning of viewing angle, light layout and sound effect coordination, making it difficult to create an attractive and memorable display environment. Therefore, a display device integrating multiple electromagnetic devices is proposed to solve the above problems. INVENTION CONTENT

[0006] The utility model aims to solve at least one of the technical defects.

[0007] Therefore, one purpose of the utility model is to provide a display device integrating multiple electromagnetic devices to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0008] In order to achieve the above-mentioned purpose, the utility model provides a display device integrating multiple electromagnetic devices, which comprises a platform and a guardrail, a ring of guardrails is fixedly connected to the edge of the top surface of the platform, a static electricity induction device is fixedly connected to the top of the platform, the static electricity induction device comprises a static electricity generating device, an insulating platform and a grounding system, the audience area of the static electricity induction device is greater than or equal to 2 meters away from the edge of the platform, and the operator is greater than or equal to 0.7 meters away from the device; A Jacob's ladder device is fixedly connected to the top of the platform, the Jacob's ladder device comprises a high-voltage power supply, an electrode system and a cooling system, a 1.5-meter-high insulating baffle is arranged around the Jacob's ladder device, and the safety distance for the audience to watch is greater than or equal to 2 meters; A Faraday cage device is fixedly connected to the top of the platform, the Faraday cage device comprises an external discharge device and a grounding system; A music Tesla device is fixedly connected to the top of the platform, the music Tesla device comprises a coil structure, a driving system and an audio processing structure, a five-meter acrylic protective barrier or metal mesh isolation is arranged around the music Tesla device; A surface discharge demonstration device is fixedly connected to the top of the platform, the surface discharge demonstration device comprises an insulating material, an electrode system and a high-voltage power supply.

[0009] Preferably, in the static electricity induction device, the static electricity generating device is composed of a metal ball shell, a conductive conveyor belt, an electric spraying needle, a current collecting needle and an insulating support, and is matched with an insulating platform, the insulating platform is an acrylic platform with a diameter of 1.2 meters and a thickness of greater than or equal to 8mm, the surface resistance is greater than 10 12 Ω, and the grounding system is connected to an independent grounding electrode by a 4mm 2 copper cable with multiple strands, and the grounding resistance is less than 4Ω.

[0010] The technical scheme has the following advantages: the electromagnetic stage is an interactive platform integrating scientific demonstration and artistic performance, and the wonderful characteristics of high-voltage electromagnetic phenomena are displayed through five classic electromagnetic experimental devices (angry hair, Jacob's ladder, Faraday cage, music Tesla coil and surface discharge). Based on international and domestic standards such as IEC 61180 and GB 26860, the design concept of "safety isolation + precise control + artistic presentation" is adopted to realize the visualization display and interactive experience of electromagnetic phenomena. The stage design has a platform opening width of 16-18 meters and a depth of 12-15 meters, the viewing distance of the audience area is controlled within 30 meters, and the balance between the viewing effect and the safety distance is ensured.

[0011] Preferably, in the Jacob's Ladder device, the high-voltage power supply is a step-up transformer with an input of AC 220V / AC 380V and an output of 0-150kV / 30mA, and a rated capacity of 450VA, and the electrode system is a conical structure with a wide top and a narrow bottom, made of stainless steel, with a bottom spacing of 5mm and a top spacing of 30cm, and the cooling system is forced air cooling with a wind volume of 0.5m³ / min or more.

[0012] Preferably, in the Faraday cage device, the cage body is designed as a spherical structure with a size of 2m x 2m x 2.5m, and a φ1mm stainless steel mesh with a mesh size of 5mm x 5mm or less is used, and in the Faraday cage device 4, the external discharge device is a Tesla coil tip discharge, and the grounding system adopts a 4mm² flat copper cable multi-point grounding with a grounding resistance of less than 4Ω.

[0013] Preferably, in the music Tesla device, the coil structure is as follows: the secondary coil is 0.5mm enameled wire wound 2000 turns on a 200cm diameter PVC cylinder, the primary coil is 14mm red copper pipe wound 6 turns, and the resonance capacitor is 0.44μF / 6000V; the driving system is a CM600DY-24NF type IGBT module with a rated current of 600A and a voltage of 1200V; the input interface for audio processing is a 3.5mm audio interface supporting mobile phone / computer connection, and the power amplification module for audio processing is an LM386 operational amplifier composed of an audio amplification circuit.

[0014] Preferably, in the surface discharge demonstration device, the insulating material is an ultra-white tempered glass cylinder with a size of 20cm in diameter and 150cm in height, and the surface is smooth without protrusions, the electrode system is a rod-plate type electrode structure with a copper electrode diameter of 10mm and a spacing of 20cm, and the high-voltage power supply is a high-voltage transformer with a voltage of 0-50kV continuously adjustable.

[0015] The technical solution realizes the artistic presentation of electromagnetic phenomena through precise parameter design, perfect safety system and scientific operation and maintenance mechanism. The scheme strictly follows the standards of IEC 61180, GB 26860, etc., and controls the risk at the lowest level while ensuring the demonstration effect. Through this system, the audience can intuitively experience the charm of electromagnetism, realizing the perfect combination of science popularization and artistic experience.

[0016] In actual operation, it is recommended to conduct a comprehensive system test once every quarter, and dynamically adjust the operating parameters according to the environmental humidity (controlled at 40%-60%) and temperature (<35℃) to ensure long-term stable operation of the equipment.

[0017] This patent is a technical innovation based on the direction of science and technology museum exhibition, aiming to provide visitors with clearer and more lasting immersive experience effects and artistic space, so that visitors can feel the tranquility of the space and experience scientific principles after stepping into it. The exhibit is in automatic demonstration mode: no operation is required, and the device can directly demonstrate the effect.

[0018] The technical key points and points to be protected of the electromagnetic grand stage are closely related to the safe display and artistic presentation of high-voltage electromagnetic phenomena. The following is a systematic analysis from the two dimensions of technical implementation and risk control: Technical key points: accurate realization of visualization and interactivity of electromagnetic phenomena, high-frequency and high-voltage energy control technology; Jacob's ladder: adopts a tapered electrode structure with a wide top and a narrow bottom (5mm at the bottom and 30cm at the top), combined with a 15kV high-voltage power supply to realize self-sustaining arc rising. Its core lies in the dynamic balance of the thermal buoyancy and electromagnetic force after air ionization.

[0019] Music Tesla coil: achieves about 78kHz high-frequency oscillation through double-resonant solid-state design (DRSSTC), uses Mitsubishi IGBT modules (600A / 1200V) to drive the primary coil, and combines 0.22μF resonant capacitor to achieve ≤10kW power output. Audio modulation is transmitted through optical fiber to ensure that the arc discharge frequency is synchronized with the music signal.

[0020] Faraday cage: uses stainless steel mesh (mesh ≤5mm) to build a 2m×2m×2.5m sphere, and controls the grounding resistance to be <2Ω through multi-point grounding (4mm² copper cable). The key lies in the conductive sealing treatment of the stainless steel mesh to ensure that the electric field strength in the cage is <1V / m when the music Tesla coil discharges.

[0021] Electromagnetic compatibility architecture: uses a hybrid grounding system — high-frequency devices (Tesla coil) use multi-point grounding (4mm² copper cable), low-frequency devices (Rage Against the Machine, Jacob's ladder, and surface discharge) use single-point grounding (4mm² copper cable), the distance between the independent grounding pole of the Faraday cage and the main grounding net is ≥5 meters, ensuring that the potential difference between each system is <50mV.

[0022] Surface discharge device: through an ultra-white tempered glass cylinder with a diameter of 20cm and a height of 150cm, the surface is smooth without protruding design, changing the electric field distribution, making the discharge path under 30kV high voltage present a controllable branching shape. The technical difficulty lies in the accurate matching of electrode spacing and material surface resistivity (>10¹²Ω) to avoid arc breakdown of the material body.

[0023] The "Hair-Stirring System" utilizes the air discharge mode of a 15kV electrostatic generator. Through the synergy of an insulating platform (surface resistance > 10¹²Ω) and an independent grounding system (resistance < 4Ω), it ensures that the hair stands up at an angle > 80° when the human body is charged, while controlling the leakage current to < 10μA.

[0024] Desired Protection Points: Constructing a multi-layered risk prevention and control system: Personnel safety protection Physical isolation and distance control: A 10mm thick acrylic barrier is installed in the red warning zone (1.5 meters around the equipment), the yellow warning zone (2-5 meters) is isolated by ground markings and guardrails, and the green safety zone (≥5 meters) ensures that the electromagnetic radiation intensity of the audience area and high-voltage equipment is <10V / m.

[0025] Operators must wear 30kV-resistant insulating gloves and 15kV-resistant insulating boots, and maintain a distance of ≥0.7 meters from the equipment during operation.

[0026] Emergency Response Mechanism: An emergency stop button is installed on the side of the stage, forming a closed loop. Pressing the button will cut off all high-voltage power within 0.1 seconds. An ozone concentration monitoring system (threshold > 0.1 ppm) and an exhaust system are in place, with forced ventilation for 3 minutes after each demonstration to ensure air quality in the audience area meets standards.

[0027] Equipment reliability protection: Overcurrent and overvoltage protection: The high-voltage power supply is equipped with a zinc oxide surge arrester (response time <10ms), the surface discharge device is set with a 50mA overcurrent protection threshold, and the music Tesla coil uses a fast fuse (50ms fuse).

[0028] When the temperature of the secondary winding of the Tesla coil exceeds 60°C, the system is triggered to shut down via an NTC thermistor. At the same time, the withstand voltage of the primary circuit capacitor (900V) is 1.5 times the rated operating voltage.

[0029] Electromagnetic interference suppression: Control cables use twisted-pair shielded cables (with the shielding layer grounded at one end), high-voltage cables are laid in metal conduits (shielding effectiveness > 60dB), and the audio system uses infrared wireless transmission to avoid signal coupling. A Faraday cage is used, with the cage body equipotentially bonded to prevent internal electric field distortion.

[0030] Temperature and humidity control: The ambient temperature in the equipment room is controlled between 15-35℃, and the humidity is 40-60% RH. The surface discharge device is equipped with 60℃ overheat protection, and the Tesla coil cavity adopts auxiliary heat dissipation to ensure that the temperature rise is <25℃ during continuous operation.

[0031] Redundancy of grounding system: The main grounding grid uses 50×50×5mm galvanized angle steel (buried at a depth of 2.5 meters), the distance between the independent grounding electrode of the Faraday cage and the main grid is ≥5 meters, and the grounding resistance is tested regularly (once a month) to ensure that all grounding electrodes are <4Ω.

[0032] High-frequency equipment uses multi-point grounding (25mm² copper cable), while low-frequency equipment uses single-point grounding (10mm² copper cable) to avoid common-mode interference caused by ground potential difference.

[0033] By precisely controlling the aforementioned key technical points and constructing a multi-layered protection system, the electromagnetic grand stage not only achieves the artistic display of electromagnetic phenomena but also minimizes the risk of electric shock to personnel (probability < 10⁻⁻⁴). 6 The annual equipment failure rate (MTBF > 10,000 hours) and electromagnetic interference (conducted disturbance < -40dBμV) are controlled at an industry-leading level, providing a safe and reliable technical paradigm for science education and cultural performances.

[0034] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: This integrated electromagnetic device precisely visualizes and interacts with electromagnetic phenomena. By integrating five classic electromagnetic experimental devices—an electrostatic induction device, a Jacob's ladder device, a Faraday cage device, a music Tesla device, and a surface discharge demonstration device—it presents high-voltage electromagnetic phenomena to the audience in an intuitive and dynamic way. For example, the electrostatic induction device allows viewers to witness the amazing phenomenon of hair standing on end when the human body is charged; the Jacob's ladder device demonstrates the self-sustaining ascent of an electric arc; and the music Tesla device synchronizes the arc discharge frequency with a music signal, thus visualizing electromagnetic phenomena. Furthermore, some devices, such as the music Tesla device, support audio input via mobile phone / computer connection, enhancing interactivity and providing an immersive scientific experience.

[0035] A multi-layered risk prevention and control system was constructed to ensure safety: a comprehensive risk prevention and control system was built from two aspects: personnel safety protection and equipment reliability protection. Regarding personnel safety protection, physical isolation and distance control were used to divide the area into red alert zones, yellow warning zones, and green safety zones, with different safety distances and isolation measures set; operators were equipped with professional protective equipment and maintained safe operating distances. For emergency response, an emergency stop button was installed, and an ozone concentration monitoring and ventilation system was provided. Regarding equipment reliability protection, multiple measures were adopted, including overcurrent and overvoltage protection, temperature protection, electromagnetic interference suppression, temperature and humidity control, and redundant grounding systems. These measures kept the risk of electric shock, equipment damage rate, and electromagnetic interference at an industry-leading level, ensuring the long-term stable and safe operation of the display device.

[0036] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0038] In the diagram: 1-Guardrail, 2-Electrostatic induction device, 3-Jacob's ladder device, 4-Faraday cage device, 5-Musical Tesla device, 6-Surface discharge demonstration device, 7-Platform. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] like Figure 1 As shown, this integrated display device for multiple electromagnetic devices includes a platform 7 and a guardrail 1. A guardrail 1 is fixedly connected to the edge of the top surface of the platform 7. An electrostatic induction device 2 is fixedly connected to the top of the platform 7. The electrostatic induction device 2 includes an electrostatic generator, an insulating platform and a grounding system. The distance between the audience area of ​​the electrostatic induction device 2 and the edge of the platform is ≥2 meters, and the distance between the operator and the device is ≥0.7 meters. The top of the platform 7 is fixedly connected to the Jacob Ladder device 3, which includes a high-voltage power supply, an electrode system and a cooling system. The Jacob Ladder device 3 is surrounded by a 1.5-meter-high insulating baffle, and the safe viewing distance for the audience is ≥2 meters. The top of the platform 7 is fixedly connected to a Faraday cage device 4, which includes an external discharge device and a grounding system. The top of the platform 7 is fixedly connected to a music Tesla device 5, which includes a coil structure, a drive system and an audio processing structure. An acrylic protective barrier or metal mesh is set up around the music Tesla device 5 within five meters. The top of the platform 7 is fixedly connected to the surface discharge demonstration device 6, which includes insulating material, electrode system and high voltage power supply.

[0042] Example 1: In the electrostatic induction device 2, the electrostatic generator consists of a metal spherical shell, a conductive conveyor belt, an electric injection needle, a collecting needle, and an insulating support, along with an insulating platform. The insulating platform is an acrylic platform with a diameter of 1.2 meters, a thickness ≥8mm, and a surface resistance >10¹²Ω. The grounding system uses a 4mm² multi-strand copper cable connected to an independent grounding electrode, with a grounding resistance <4Ω. In the Jacob's Ladder device 3, the high-voltage power supply is a step-up transformer with an input of AC220V / AC380V and an output of 0-150kV / 30mA, a rated capacity of 450VA. The electrode system is a tapered structure that is wider at the top and narrower at the bottom, made of stainless steel, with a bottom spacing of 5mm and a top spacing of 30cm. The cooling system is forced air cooling with an airflow ≥0.5m³ / min. The Faraday cage device 4 has a 2m×2m×2.5m spherical structure with a φ1mm stainless steel mesh and a mesh size of ≤5mm×5mm. In Faraday cage device 4, the external discharge device is a Tesla coil tip discharge, and the grounding system uses 4mm² flat copper cable with multiple grounding points, resulting in a grounding resistance of <4Ω. The music Tesla device 5 has the following coil structure: secondary coil: 0.5mm enameled wire wound 2000 turns on a 200cm diameter PVC tube; primary coil: 14mm copper tube wound 6 turns; resonant capacitor: 0.44μF / 6000V; drive system: CM600DY-24NF IGBT module, rated current 600A, voltage 1200V; audio processing input interface: 3.5mm audio interface, supporting mobile phone / computer connection; audio processing power amplification module: LM386 operational amplifier forming the audio amplification circuit. In the surface discharge demonstration device 6, the insulating material is an ultra-white tempered glass tube with a diameter of 20cm and a height of 150cm. The surface is smooth and without protrusions. The electrode system is a rod-plate electrode structure with copper electrodes of 10mm in diameter and spaced 20cm apart. The high-voltage power supply is a high-voltage transformer with a voltage that can be continuously adjusted from 0 to 50kV.

[0043] Example 2: The Electromagnetic Grand Stage is an interactive platform integrating scientific demonstration and artistic expression. It showcases the amazing properties of high-voltage electromagnetic phenomena through five classic electromagnetic experimental devices (Hair Blossom, Jacob's Ladder, Faraday Cage, Musical Tesla Coil, and Surface Discharge). This design is based on international and domestic standards such as IEC 61180 and GB 26860, employing a design concept of "safety isolation + precise control + artistic presentation" to achieve a visual display and interactive experience of electromagnetic phenomena. The stage design features a proscenium width of 16-18 meters and a depth of 12-15 meters, with the audience viewing distance controlled within 30 meters to ensure a balance between viewing effect and safety distance.

[0044] This technical solution, through precise parameter design, a comprehensive safety system, and a scientific operation and maintenance mechanism, achieves an artistic presentation of electromagnetic phenomena. The solution strictly adheres to standards such as IEC 61180 and GB 26860, ensuring effective demonstrations while minimizing risks. Through this system, audiences can directly experience the charm of electromagnetism, achieving a perfect blend of science popularization and artistic experience.

[0045] In actual operation, it is recommended to conduct a comprehensive system test every quarter, and dynamically adjust the operating parameters according to the ambient humidity (controlled at 40%-60%) and temperature (<35℃) to ensure long-term stable operation of the equipment.

[0046] This patent represents a technological innovation based on the exhibition design of science museums. Its aim is to provide visitors with a clearer and more lasting immersive experience and artistic space, allowing them to feel the tranquility of the space and personally experience scientific principles. The exhibits operate in an automatic demonstration mode: no operation is required; visitors can directly view the dynamic demonstration effects of the device.

[0047] The key technologies and protection points of the electromagnetic stage are closely related to the safe display and artistic presentation of high-voltage electromagnetic phenomena. The following is a systematic analysis from two dimensions: technical implementation and risk prevention. Key technical points: Precise visualization and interactivity of electromagnetic phenomena, high-frequency high-voltage energy control technology; Jacob's Ladder: It employs a conical electrode structure that is wider at the top and narrower at the bottom (5mm spacing at the bottom / 30cm at the top), combined with a 15kV high-voltage power supply to achieve self-sustaining arc ascent. Its core lies in utilizing the dynamic balance between the thermal buoyancy of air ionization and electromagnetic force.

[0048] Music Tesla Coil: Achieves approximately 78kHz high-frequency oscillation through a dual-resonant solid-state design (DRSSTC), using a Mitsubishi IGBT module (600A / 1200V) to drive the primary coil, combined with a 0.22μF resonant capacitor to achieve ≤10kW power output. Audio modulation is transmitted via optical fiber to ensure that the arc discharge frequency is synchronized with the music signal.

[0049] Faraday cage: A 2m×2m×2.5m sphere is constructed using stainless steel mesh (mesh size ≤5mm), and the grounding resistance is controlled to <2Ω through multi-point grounding (4mm² copper cable). The key lies in the conductive sealing treatment of the stainless steel mesh, ensuring that the electric field strength inside the cage is <1V / m when the music Tesla coil discharges.

[0050] Electromagnetic compatibility architecture: A hybrid grounding system is adopted—high-frequency equipment (Tesla coil) uses multi-point grounding (4mm² copper cable), while low-frequency equipment (Furious Crash, Jacob's Ladder, Surface Discharge) uses single-point grounding (4mm² copper cable). The distance between the independent grounding electrode of the Faraday cage and the main grounding grid is ≥5 meters to ensure that the potential difference between each system is <50mV.

[0051] Surface discharge device: Using an ultra-white tempered glass tube, 20cm in diameter and 150cm in height, with a smooth, non-protruding surface, it alters the electric field distribution, causing the discharge path under 30kV high voltage to exhibit a controllable branching pattern. The technical challenge lies in the precise matching of the electrode spacing with the material's surface resistivity (>10¹²Ω) to prevent arc breakdown of the material.

[0052] The "Hair-Stirring System" utilizes the air discharge mode of a 15kV electrostatic generator. Through the synergy of an insulating platform (surface resistance > 10¹²Ω) and an independent grounding system (resistance < 4Ω), it ensures that the hair stands up at an angle > 80° when the human body is charged, while controlling the leakage current to < 10μA.

[0053] Points to be protected: Constructing a multi-layered risk prevention and control system; Personnel safety protection: Physical isolation and distance control: A 10mm thick acrylic barrier is installed in the red warning zone (1.5 meters around the equipment), the yellow warning zone (2-5 meters) is isolated by ground markings and guardrails, and the green safety zone (≥5 meters) ensures that the electromagnetic radiation intensity of the audience area and high-voltage equipment is <10V / m.

[0054] Operators must wear 30kV-resistant insulating gloves and 15kV-resistant insulating boots, and maintain a distance of ≥0.7 meters from the equipment during operation.

[0055] Emergency Response Mechanism: An emergency stop button is installed on the side of the stage, forming a closed loop. Pressing the button will cut off all high-voltage power within 0.1 seconds. An ozone concentration monitoring system (threshold > 0.1 ppm) and an exhaust system are in place, with forced ventilation for 3 minutes after each demonstration to ensure air quality in the audience area meets standards.

[0056] Equipment reliability protection: Overcurrent and overvoltage protection: The high-voltage power supply is equipped with a zinc oxide surge arrester (response time <10ms), the surface discharge device is set with a 50mA overcurrent protection threshold, and the music Tesla coil uses a fast fuse (50ms fuse).

[0057] When the temperature of the secondary winding of the Tesla coil exceeds 60°C, the system is triggered to shut down via an NTC thermistor. At the same time, the withstand voltage of the primary circuit capacitor (900V) is 1.5 times the rated operating voltage.

[0058] Electromagnetic interference suppression: Control cables use twisted-pair shielded cables (with the shielding layer grounded at one end), high-voltage cables are laid in metal conduits (shielding effectiveness > 60dB), and the audio system uses infrared wireless transmission to avoid signal coupling. A Faraday cage is used, with the cage body equipotentially bonded to prevent internal electric field distortion.

[0059] Temperature and humidity control: The ambient temperature in the equipment room is controlled between 15-35℃, and the humidity is 40-60% RH. The surface discharge device is equipped with 60℃ overheat protection, and the Tesla coil cavity adopts auxiliary heat dissipation to ensure that the temperature rise is <25℃ during continuous operation.

[0060] Redundancy of grounding system: The main grounding grid uses 50×50×5mm galvanized angle steel (buried at a depth of 2.5 meters), the distance between the independent grounding electrode of the Faraday cage and the main grid is ≥5 meters, and the grounding resistance is tested regularly (once a month) to ensure that all grounding electrodes are <4Ω.

[0061] High-frequency equipment uses multi-point grounding (25mm² copper cable), while low-frequency equipment uses single-point grounding (10mm² copper cable) to avoid common-mode interference caused by ground potential difference.

[0062] By precisely controlling the aforementioned key technical points and constructing a multi-layered protection system, the electromagnetic grand stage not only achieves the artistic display of electromagnetic phenomena but also minimizes the risk of electric shock to personnel (probability < 10⁻⁻⁴). 6 The annual equipment failure rate (MTBF > 10,000 hours) and electromagnetic interference (conducted disturbance < -40dBμV) are controlled at an industry-leading level, providing a safe and reliable technical paradigm for science education and cultural performances.

[0063] The working principle of this utility model is as follows: Electrostatic Induction Device 2: The electrostatic generator consists of a metal spherical shell, a conductive conveyor belt, an electric injection needle, a collecting needle, and an insulating support, paired with an acrylic insulating platform with a diameter of 1.2 meters, a thickness of ≥8mm, and a surface resistance >10¹²Ω. The electrostatic generator produces static electricity. Utilizing the synergistic effect of the insulating platform and an independent grounding system (using 4mm² multi-strand copper cables connected to an independent grounding electrode, with a grounding resistance <4Ω), when a viewer stands on the insulating platform and touches the electrostatic generator, their body becomes charged, causing their hair to stand on end. The leakage current is controlled to <10μA to ensure safety, achieving the demonstration of the "hair standing on end" phenomenon.

[0064] Jacob's Ladder Installation 3: Employs a stainless steel electrode system with a tapered structure (5mm spacing at the bottom, 30cm spacing at the top). The high-voltage power supply is a step-up transformer (input AC220V / AC380V, output 0-150kV / 30mA, rated capacity 450VA). The cooling system is forced air cooling (airflow ≥0.5m³ / min). High voltage is applied between the electrodes, causing the air at the bottom to break down and form an electric arc. Utilizing the dynamic balance between the thermal buoyancy of the ionized air and electromagnetic force, the arc sustains its ascent to the top, demonstrating the Jacob's Ladder phenomenon. A 1.5-meter-high insulating barrier is installed around the installation, ensuring a safe viewing distance of ≥2 meters for the audience.

[0065] Faraday Cage Device 4: The cage is designed as a 2m×2m×2.5m spherical structure, using φ1mm stainless steel mesh (mesh size ≤5mm×5mm). The external discharge device is a Tesla coil tip discharge, and the grounding system uses 4mm² flat copper cable for multi-point grounding, with a grounding resistance <4Ω. When there is an external electric field or discharge, the conductive sealing treatment of the stainless steel mesh distributes the charge on the outer surface of the cage. Through multi-point grounding, the charge is conducted to the ground, ensuring that the electric field strength inside the cage is <1V / m, thus ensuring the safety of personnel inside the cage.

[0066] Music Tesla Device 5: In its coil structure, the secondary coil is wound 2000 turns of 0.5mm enameled wire onto a 200cm diameter PVC tube, while the primary coil is wound 6 turns of 14mm copper tubing. The resonant capacitor is 0.44μF / 6000V. The drive system is a CM600DY-24NF IGBT module (rated current 600A, voltage 1200V). The audio processing input interface is a 3.5mm audio jack, supporting mobile phone / computer connection. The power amplification module is an LM386 operational amplifier forming the audio amplification circuit. A high-frequency oscillation of approximately 78kHz is achieved through a dual-resonant solid-state design (DRSSTC). The Mitsubishi IGBT module drives the primary coil, and combined with the resonant capacitor, achieves a power output of ≤10kW. Audio modulation is transmitted via optical fiber, synchronizing the arc discharge frequency with the music signal, realizing an interactive display of music and arc discharge. An acrylic protective barrier or metal mesh is installed within a five-meter radius to ensure safety.

[0067] Surface discharge demonstration device 6: A smooth, non-protruding ultra-white tempered glass cylinder with a diameter of 20cm and a height of 150cm is used as the insulating material. The electrode system is a rod-plate electrode structure (copper electrodes, 10mm in diameter, spaced 20cm apart). The high-voltage power supply is a high-voltage transformer (voltage continuously adjustable from 0 to 50kV). By precisely matching the electrode spacing with the material surface resistivity (>10¹²Ω), the electric field distribution is changed, causing the discharge path under 30kV high voltage to exhibit a controllable branching shape, thus demonstrating the surface discharge phenomenon.

[0068] Compared with the prior art, the present invention has the following advantages: This integrated electromagnetic device precisely visualizes and interacts with electromagnetic phenomena. By integrating five classic electromagnetic experimental devices—the electrostatic induction device 2, the Jacob's Ladder device 3, the Faraday Cage device 4, the Music Tesla device 5, and the surface discharge demonstration device 6—it presents high-voltage electromagnetic phenomena to the audience in an intuitive and dynamic way. For example, the electrostatic induction device 2 allows viewers to witness the amazing phenomenon of hair standing on end when the human body is charged; the Jacob's Ladder device 3 demonstrates the self-sustaining ascent of an electric arc; and the Music Tesla device 5 synchronizes the arc discharge frequency with a music signal, thus visualizing electromagnetic phenomena. Simultaneously, some devices, such as the Music Tesla device 5, support audio input via mobile phone / computer connection, enhancing interactivity and providing an immersive scientific experience for the audience.

[0069] A multi-layered risk prevention and control system was constructed to ensure safety: a comprehensive risk prevention and control system was built from two aspects: personnel safety protection and equipment reliability protection. Regarding personnel safety protection, physical isolation and distance control were used to divide the area into red alert zones, yellow warning zones, and green safety zones, with different safety distances and isolation measures set; operators were equipped with professional protective equipment and maintained safe operating distances. For emergency response, an emergency stop button was installed, and an ozone concentration monitoring and ventilation system was provided. Regarding equipment reliability protection, multiple measures were adopted, including overcurrent and overvoltage protection, temperature protection, electromagnetic interference suppression, temperature and humidity control, and redundant grounding systems. These measures kept the risk of electric shock, equipment damage rate, and electromagnetic interference at an industry-leading level, ensuring the long-term stable and safe operation of the display device.

Claims

1. A display device integrating multiple electromagnetic devices, characterized in that, Includes a platform (7) and a guardrail (1). A guardrail (1) is fixedly connected to the edge of the top surface of the platform (7). An electrostatic induction device (2) is fixedly connected to the top of the platform (7). The electrostatic induction device (2) includes an electrostatic generator, an insulating platform and a grounding system. The distance between the audience area of ​​the electrostatic induction device (2) and the edge of the platform is ≥2 meters, and the distance between the operator and the equipment is ≥0.7 meters. The top of the platform (7) is fixedly connected to the Jacob ladder device (3), which includes a high voltage power supply, an electrode system and a cooling system. The Jacob ladder device (3) is surrounded by a 1.5-meter-high insulating baffle, and the safe viewing distance for the audience is ≥2 meters. The top of the platform (7) is fixedly connected to a Faraday cage device (4), which includes an external discharge device and a grounding system. The top of the platform (7) is fixedly connected to a music Tesla device (5), which includes a coil structure, a drive system and an audio processing structure. An acrylic protective barrier or metal mesh is set up around the music Tesla device (5) within five meters. The top of the platform (7) is fixedly connected to a surface discharge demonstration device (6), which includes insulating material, an electrode system and a high-voltage power supply.

2. A display device integrating multiple electromagnetic devices as described in claim 1, characterized in that: In the electrostatic induction device (2), the electrostatic generator consists of a metal spherical shell, a conductive conveyor belt, an electric injection needle, a collecting needle, and an insulating support, and is equipped with an insulating platform. The insulating platform is an acrylic platform with a diameter of 1.2 meters, a thickness of ≥8 mm, and a surface resistance of >10¹²Ω. The grounding system uses a 4 mm² multi-strand copper cable connected to an independent grounding electrode, and the grounding resistance is <4Ω.

3. The display device integrating multiple electromagnetic devices as described in claim 2, characterized in that: In the Jacob ladder device (3), the high voltage power supply is a step-up transformer with input AC220V / AC380V and output 0-150kV / 30mA, rated capacity 450VA. The electrode system is a tapered structure with a wide top and narrow bottom, made of stainless steel, with a bottom spacing of 5mm and a top spacing of 30cm. The cooling system is forced air cooling with an air volume ≥0.5m³ / min.

4. The display device integrating multiple electromagnetic devices as described in claim 3, characterized in that: The cage of the Faraday cage device (4) is designed as a 2m×2m×2.5m spherical structure, using φ1mm stainless steel mesh with a mesh size ≤5mm×5mm. In the Faraday cage device (4), the external discharge device is a Tesla coil tip discharge, and the grounding system uses 4mm² flat copper cable for multi-point grounding with a grounding resistance <4Ω.

5. A display device integrating multiple electromagnetic devices as described in claim 4, characterized in that: The music Tesla device (5) has the following coil structure: secondary coil: 2000 turns of 0.5mm enameled wire wound on a 200cm diameter PVC tube; primary coil: 6 turns of 14mm copper tube wound; resonant capacitor: 0.44μF / 6000V; driving system: CM600DY-24NF type IGBT module, rated current 600A, voltage 1200V; audio processing input interface: 3.5mm audio interface, supporting mobile phone / computer connection; audio processing power amplification module: LM386 operational amplifier forming an audio amplification circuit.

6. The display device integrating multiple electromagnetic devices as described in claim 5, characterized in that: In the surface discharge demonstration device (6), the insulating material is an ultra-white tempered glass tube with a diameter of 20cm and a height of 150cm. The surface is smooth and without protrusions. The electrode system is a rod-plate electrode structure with copper electrodes of 10mm in diameter and 20cm in spacing. The high-voltage power supply is a high-voltage transformer with a voltage that can be continuously adjusted from 0 to 50kV.

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