The BR-A shockwave cannon is a bird-deterrent device that employs high sound pressure and air-field control technology. It consists of a barrel, a combustion system, a power supply system, a positioning system, and a control system. A throttling valve and solenoid valves inject a precisely measured amount of compressed fuel gas into the barrel, where it mixes dynamically with the ambient air. An electronic ignition unit, controlled by a time relay, regulates the frequency of combustion and detonation. The resulting high-pressure gas passes through a turbulence-generating device, creating a nonlinear shock wave airflow that establishes a turbulent air field extending approximately 2,000 meters and generating sound pressures exceeding 200 dB. Birds are rapidly driven away by the induced turbulent airflow and the intense sound pressure, thereby achieving effective bird deterrence. The BR-A shockwave cannon offers several advantages, including high sound pressure, low operating costs, convenient adjustability, and excellent deterrent performance.

　　1. Main Structure

　　1) Gun barrel structure

　　The cannon body is entirely fabricated from 5-mm-thick 304 stainless steel. The barrel features a cylindrical design with a flared muzzle, and its interior is equipped with a matching bifurcated turbulence structure and gas-guiding grooves. At the opposite end of the barrel is an air inlet fitted with several baffle plates that can be opened to allow airflow or closed to block it. This configuration effectively generates a nonlinear shock wave from the high-pressure combustion gases, thereby expanding the effective range of the bird-repelling effect.

　　2) Combustion System

　　It mainly comprises a premix chamber and fuel delivery pipes, oxidizer gas pipes, and an electronic ignition device connected to its side wall. The premix chamber is connected to the gun barrel’s air inlet; a throttling valve and a solenoid valve are used to inject a precisely controlled amount of compressed fuel gas into the premix chamber, where it is pre-mixed with dynamic oxidizing gas (air). An time relay then controls the electronic ignition device, thereby regulating the frequency of combustion and detonation.

　　3) Power Supply System

　　This shockwave cannon is equipped with a 30 W monocrystalline silicon solar panel and a charge controller, and comes standard with a 105 Ah battery. During the day, the electricity generated by the solar panel charges the battery, eliminating the need for external power and ensuring reliable year-round outdoor operation.

　　4) Positioning System

　　The mobile base and retractable support frame combine to form a height-adjustable, rotatable gimbal, enabling 360° horizontal rotation and 60° vertical tilt. Equipped with four castor wheels, the unit is easy to move and can be locked in any position once relocated. The device can also be mounted on pickup trucks of comparable class, such as the Jiangxi Isuzu, Nissan Navara, and JMC Troller, further enhancing its portability and expanding its bird-repelling coverage.

　　5) Control System

　　The system includes a master control module that employs a 32-bit microprocessor to programmatically control electrical connections for devices such as the ignition system, fuel control valve, and oxidizer control valve. Based on this control system, the shock-wave cannon can operate in either automatic or manual mode. In automatic mode, users set predefined parameters—such as fuel flow rate, oxidizer flow rate, ignition timing, and ignition interval—to precisely control the cannon’s firing schedule, inter-firing intervals, and total number of shots. In manual mode, users can adjust these parameters in real time and initiate firing via a handheld remote control.

　　2. Performance Metrics

　　1) Airflow pressure

　　By controlling the fuel-to-oxidizer molar ratio and optimizing the internal and external structure of the barrel, an outlet gas flow pressure of 20–50 atmospheres is achieved.

　　2) Transmission Mode

　　Can be fired singly or in unlimited bursts.

　　3) Transmission Frequency

　　With a firing interval of 1 second, 2 seconds, 3 seconds, or 4 seconds, the firing success rate is ≥95% when wind force is at or below Level 6.

　　4) Effective Communication Distance

　　>2,000 meters.

　　5) Shock wave velocity

　　>1800 meters per second.

　　6) Thunder Sound Pressure Level

　　1. The muzzle blast sound level ≥ 200 dB.

　　7) Fuel Consumption

　　A gas distribution cabinet is used, with liquefied petroleum gas or ethylene as the fuel source. When a 5 kg cylinder of liquefied petroleum gas or ethylene is fully charged, it can continuously fire ≥800 shots under normal conditions, with each shot consuming 2 g of gas.

　　8) Power Supply Method

　　Crystalline silicon solar panels, with panel tilt adjustable according to latitude.

　　Equipped with a 12V 105Ah maintenance-free battery, which is charged by crystalline silicon solar panels, ensuring operation for up to 30 consecutive overcast or rainy days.

　　9) Control Module

　　Integrated control cabinet: the service life of internal control components under operation shall be no less than 800,000 cycles, with an operating temperature of

　　-40℃ to 85℃.

　　The handheld remote control has a transmission range of approximately 2 kilometers, a transmit power of about 2 watts, and operates on the unlicensed 2.4 GHz frequency band, ensuring no interference with normal airport communications.

　　10) Rainproof Design

　　The ignition system, fuel gas cylinders, oxidizer generator, and electrical control system are all housed in their respective independent rainproof enclosures, which are further equipped with a comprehensive rainproof cover for the shockwave cannon.

　　3. Instructions for Use

　　1) Venue and Environmental Requirements

　　A. The area requiring bird control must be open on all sides and free of flammable materials.

　　B. No foreign objects are permitted to enter the shockwave gun barrel.

　　C. High-purity liquefied petroleum gas or ethylene must be used as the combustion/explosion medium (free of impurities, oil residues, etc.); otherwise, the solenoid valve will need to be replaced frequently.

　　D. No personnel are permitted to stand near the muzzle to prevent personal injury.

　　2) Usage Steps

　　A. Secure the sonic cannon in place or mount it on a pickup truck for deployment in areas where bird control is required, ensuring that the surrounding area is clear of flammable materials. When used in a fixed position, firmly anchor the cannon’s four legs using expansion bolts installed in ground stakes or concrete bases. When transporting the unit, secure the muzzle and the cannon base to the bed of the pickup truck with a tow rope.

　　B. Place the fuel gas cylinder inside the explosion-proof enclosure. When in use, drive all four support legs into the soil, level the enclosure properly, and ensure it is securely fastened. When transporting the unit, position the explosion-proof enclosure at the rear bed of a pickup truck and secure it firmly.

　　C. Use high-pressure metal gas pipelines to convey fuel gas and oxidizer gas, connecting one end to the fuel inlet or oxidizer inlet of the shock-wave cannon and the other end to the pressure-reducing valve of the fuel-gas cylinder or the outlet nozzle of the oxidizer-generator, and secure the connections with pipe clamps. Open the cylinder valves and inspect the entire pipeline for leaks. A concentrated soap-solution brush test may be used for leak detection; open flames are prohibited.

　　D. Turn on the power switch and, with no gas flow, press the manual button or operate the remote control to verify that the shock-wave cannon’s ignition system is functioning properly. Then open the fuel-gas cylinder and the oxidizer-generator, and adjust the outlet pressure of the pressure-reducing valve (increasing or decreasing it), as well as the opening degrees of the shut-off valves in the fuel and oxidizer pipelines, until the loudest detonation sound is produced.

　　Introduction to the Bird-Repelling Shockwave Cannon

　　The bird-deterrent sonic cannon primarily consists of a cannon barrel, a rotatable and elevatable pan-tilt unit, an ignition system, a combustion chamber, an electrical control system, an oxidizer generator, and a remote control, as detailed below:

　　(1) Gun barrel

　　The gun barrel is integrally formed from 5-mm-thick stainless steel and incorporates an internal shock-wave turbulence generator, which converts the explosive gas flow into a shock wave to disrupt the forward airfield.

　　(2) Rotating and Elevating Pan-Tilt Unit

　　The rotary elevation gimbal enables 360° horizontal rotation and 60° vertical elevation adjustment of the gun barrel, allowing precise targeting—wherever the bird is, aim directly at it—ensuring the bird is always under the menacing gaze of the muzzle.

　　(3) Combustion Chamber

　　The combustion chamber is constructed from 15-mm-thick stainless steel to ensure safety, and is equipped with two ignition devices that extend deep into the chamber to mitigate high-pressure hazards. The igniters utilize dual iridium-plated needle-type spark plugs, with nickel-plated housings and sealing gaskets; the spark plug tips are made of ceramic insulators, providing excellent insulation, heat dissipation, impact resistance, and mechanical strength. A wiring nut at the base of the insulator facilitates connection to the ignition coil.

　　(4) Electrical Control System

　　The electrical control system, which comprises drivers, voltage converters, wireless transmitters, and circuit control units, is the core component of the bird-deterrent shockwave cannon. It can be connected to a computer to adjust the cannon’s firing parameters, allowing for tailored settings based on specific bird activity levels. This enables precise control over the amount of combustible gas used, optimizing gas utilization and enhancing overall efficiency.

　　(5) Combustion-supporting gas generator

　　The combustion-supporting gas generator is a variable-frequency fan, with the following parameters:

　　(6) Shut-off valve

　　Pilot-diaphragm solenoid valve, with the following specifications:

　　(7) Remote control

　　The remote control uses a standard 9V battery, and a single remote can operate multiple shockwave cannons with no limit on the number. Under normal conditions, the battery in one remote can last 5–6 months, with a maximum operating range of up to 100 meters. Operation is simple and extremely convenient.

　　2) Notice of Acceptance for Invention Patent

　　1) Test Report

　　4) Experimental Evaluation Report

　　7.2.3 Gas Cylinder Explosion-Proof Enclosure

　　The explosion-proof cabinet for gas cylinders contains combustible gas cylinders, pressure regulators, flashback arrestors, explosion-proof gas hoses, alarms, and other components.

　　The explosion-proof enclosure is equipped with an automatic combustible-gas detector. When a gas leak occurs, the detector immediately triggers an alarm, the audible alarm sounds, and the overhead ventilation fan automatically starts up at high efficiency to exhaust the gas outdoors via the ductwork.

　　The explosion-proof enclosure has a fixed volume of 22 gallons and can accommodate a 40-liter gas cylinder; custom sizes are available to suit specific cylinders.

　　7.2.4 Backup Power

　　To facilitate commissioning and training, ensure the vehicle’s range in subsequent operations, and extend the operational duration of the shockwave cannon, one power supply unit is provided with the following specifications:

　　7.3 Performance and Features

　　The performance and features of the bird-deterrent sonic cannon vehicle are as follows:

　　1. Excellent maneuverability: once bird activity is detected, the system can immediately deploy to deter birds, delivering remarkable results.

　　2. Wide bird-deterrence coverage, extending up to 500,000 square meters, capable of deterring birds across the entire airport;

　　3. Adjustable parameters: The firing parameters of the shockwave cannon can be adjusted via a custom software system on a computer, allowing control over sound pressure level and wave intensity.

　　4. Remote control transmission eliminates the discomfort caused by intense sound waves to operators, enabling safe, remote bird deterrence.

　　5. Targeted firing: The rotating elevation platform enables the gun barrel to be aimed at areas with a high concentration of birds, allowing for directional emission of shock waves to precisely deter avian activity.

　　6. Made of high-strength stainless steel, ensuring the shockwave cannon is safe and reliable;

　　7. Low air consumption for actuation, resulting in lower costs and easy maintenance;

　　8. The shock waves generated by random air disturbances reduce birds’ adaptability, unlike conventional acoustic bird-scaring devices that rely on sound, which can easily lead to habituation in birds.

　　9. Multiple sonic cannons can be linked and coordinated, with real-time, remote bird deterrence achieved via video transmission, thereby expanding the effective coverage area of the sonic cannons.

　　7.4 Product Quality Level

　　Verification has confirmed that the bird-deterrent shockwave cannon vehicle manufactured by our company complies with national regulatory requirements and meets the technical specifications outlined in the tender. This shockwave cannon is capable of emitting both intense sound waves and a measurable shockwave, thereby disrupting the airfield environment within the targeted bird-deterrence zone to achieve contact-based bird control while ensuring the safety of avian species. The dual impact of acoustic stimulation and airflow disturbance effectively startles birds, prompting them to flee and thus achieving the intended bird-deterrence effect. Moreover, because the shockwaves emitted by this device generate random, disruptive airflows, birds are less likely to develop habituation, resulting in pronounced efficacy across a wide range of avian species. All components of this product are fabricated from high-grade, high-strength steel, ensuring reliability, durability, and ease of operation.

　　This product incorporates original, patented technology for which an invention patent has been filed, and its technical level is internationally leading.

　 　8. Standards and methods for product manufacturing, installation, and acceptance

　　8.1 Product Manufacturing

　　This product is entirely designed and manufactured by our company. It is custom-built in accordance with the customer’s relevant standards and technical specifications, and is available in a wide range of colors and configurations to meet the requirements of diverse application scenarios. The raw materials are primarily selected for their environmental friendliness and resource efficiency, ensuring both safety and optimal performance. We prioritize domestic brands for components wherever possible, thereby strongly supporting the development of China-made equipment manufacturing. To prevent counterfeit products, we employ specialized manufacturing techniques, utilize non-standard, custom-designed parts, and re-engineer production processes, all of which help maintain the integrity and seamless integration of the entire system.

　　After the product is completed and delivered to the customer for use, we can also make modifications or upgrades based on issues encountered during actual operation, ensuring ease of use and optimal performance.

　　8.2 Product Installation

　　1. Equipment installation shall be carried out in strict accordance with the relevant construction codes and the methods, procedures, and requirements specified in the accompanying technical documentation.

　　2. Preparatory Work for Equipment Installation Projects

　　① Prior to installation, all relevant responsible personnel and construction supervisors shall first familiarize themselves with the construction drawings, codes, and related technical documents. On this basis, they shall participate in the drawing review meeting and keep detailed records; following the meeting, they shall conduct a technical briefing for the construction teams.

　　② Prior to equipment installation, the package shall be opened for inspection. A comprehensive visual inspection of the equipment shall be conducted, and all components shall be counted to verify that none are damaged or missing. The verification results shall be documented, and it shall also be confirmed that all accompanying documentation is complete.

　　③ Upon unpacking the equipment, all relevant parties must be present simultaneously and sign the inspection record. Following unpacking, the equipment’s components must be carefully protected and properly stored.

　　3. Equipment Installation and Positioning: The handling and installation of equipment shall comply with the following provisions.

　　① Before installation, place shims under the equipment to ensure it is properly supported and to prevent deformation and moisture damage.

　　② For installations involving units with a base, the load application points must not cause torsional distortion or deformation of the unit base.

　　③ The contact areas between the equipment base and the equipment shall be padded with soft materials to prevent damage to the equipment, its frame, piping, instruments, accessories, and other components, as well as to protect the paint from abrasion.