Defence Technology Academic Journal

Development of Smart Camera Network Platform using Pineapple Program for the CCTV System of Provincial Police Region 4

Jetsada Kumphong — 2025-02-04

This study aims to develop a CCTV system based on geographic information. The design and development of the computer program aligns with the usage requirements and data analysis by comparing the efficiency of the program with other programs. The results showed that the Pineapple program, the smart camera network platform of the Provincial Police Region 4 is a computer program that is utilized for the purpose of showing the locations of closed circuit cameras that have been installed in various locations on a variety of geometrical information maps. These maps include Google Map, Bing Map, and others. The following characteristics are possessed by the program: 1) It displays details and an unlimited number of spots and positions of closed circuit cameras that have been registered with the system. 2) It displays the video clips recorded by all cameras in the system simultaneously at real time and flashback; 3) It downloads video files from all cameras at the time that is set; and 4) It is compatible with all brands of closed circuit cameras

Development of Electronic Fuzing System Prototype for Kamikaze Unmanned Aerial Vehicle

Phulkjika Sooksirimuch — 2025-02-04

Fuze systems are integral components of numerous weapon systems, including artillery
shells, rockets, missiles, and nuclear warheads, enhancing target engagement effectiveness.
The current trend involves the development of armed kamikaze UAVs for both offensive and
defensive applications. These UAVs can be deployed in swarms for second-wave attacks, targeting
fleeing enemy forces, striking troop concentrations, or intercepting incoming missiles and aircraft.
This necessitates a thorough investigation into the operational mechanisms of electronic fuze
systems within the context of kamikaze UAV integration. This research focuses on the design
and development of an effective and safe electronic fuze system for seamless integration with
kamikaze UAVs. The study involves compiling existing knowledge and developing a design that
ensures efficient and reliable operation. The resulting design of the electronic fuze circuit adheres
to MIL-STD-1316 military standards. It comprises two independent, concurrently operating systems,
with key components including a safe & arming circuit, a storage system, a sensing system, and
a detonation system. The fuze system employs a two-stage arming sequence. The initial stage
involves monitoring acceleration data following the kamikaze UAV's takeoff. Once predetermined
parameters and durations are met, the first safety mechanism is disengaged. Upon the UAV's
approach to the target within a specified range, the remaining safety mechanisms are released,
activating the fuze. Upon target impact, the explosive charge is immediately detonated. Based
on this operational analysis, an electronic board has been designed to simulate the arrangement
of real-world electronic components. This prototype serves as a foundation for further research
and development efforts.

Export Assessment Guidelines of Thai Security Products to Foreign Countries

Bodin Suntud — 2024-12-04

This research aims to investigate and analyze strategic factors influencing the export of Thailand's security products to foreign markets. It compiles a comprehensive database detailing the opportunities and demands of potential target countries for importing these products and provides guidelines and recommendations for relevant agencies. Employing a qualitative research method, this study introduces nine strategic factors influencing arms export decisions. These factors were applied to a thorough analysis of nine countries, offering a framework for assessing the strategic ramifications of arms export decisions. The study is structured into three main sections. The first section provides an overview of strategic environments, including economic, political, technological ownership, social factors, and international relations. The second section analyzes the strategic environments and opportunities influencing export potential, considering the specific needs and industry base of target countries. The third section presents a summary table of prioritization and recommendations of defense products suitable for the target countries. The research indicates that the Philippines are the best-prepared and most suitable export destination among Southeast Asian nations to export, while Myanmar and Cambodia are difficult destinations and are the least prepared and suitable choices. This document serves as a valuable database for agencies involved in defense industry exports, providing strategic decisions and actions related to the export of defense products. It focuses on countries with established diplomatic relations with Thailand and a moderate to low level of domestic defense industrial development, especially in Southeast Asia, aiming to enhance export potential and international cooperation in the defense sector.

Research and Design of Multi-purposed 4x4 Wheeled Armored Vehicle

Krit Threepopnartkul — 2024-10-31

The research and design of the 4x4 multi-purpose wheeled armored vehicle
focused on developing a vehicle to the needs of the Army using a systematic engineering
approach. The project began with the collection of user requirements, followed by design and
analysis of vehicle dynamics and protection performance. Upon meeting the specified criteria,
subsystems were designed, developed, and assembled into a complete vehicle. Verification
involved specialized field tests and functional evaluations to ensure the vehicle met defined
operational standards. The results confirmed that the 4x4 multi-purpose wheeled armored
vehicle fulfilled mission requirements, exhibiting modern and efficient performance. It proved
to be well-suited for rugged terrains, equipped with user-friendly features, smooth suspension,
capable of transporting personnel and achieving desired speeds as specified by the users.

Research and Development of Chatbot in National Defense Information

Chanatip Chuenmanus — 2025-01-09

A chatbot is a type of Artificial Intelligence (AI) that falls within the field of Natural Language Processing (NLP). It is a machine learning technology that enables computers to interpret, manage, and understand human language. Organizations today have large amounts of data from various communication channels such as emails, text messages, social media news feeds, videos, audio, and more. They use NLP software to automatically process this data. The purpose is to experiment with chatbot systems for a defense journal so that they can provide knowledge and answer questions for external individuals regarding defense technology. The accuracy of the chatbot system in answering questions is found to be between 80-100%, indicating that it performs very well with the data available in the defense journal.

A Study and Initial Design of Automatic Small Firearm

Niwat Jaikam — 2025-02-04

The purpose of this study is to research and develop a gas piston automatic rifle to understand the design that can be further developed in the future. This is achieved by using theory alongside the motion simulation of the Emtan M4A1 rifle as a starting point for determining variables for design and studying the relationship between the motion distance of the piston rod, firing rate, spring constant, force in the piston rod, and the size of the gas port. The study found that the motion distance of the piston rod has a nonlinear effect on other variables over a wide stroke range, but it can be approximated linearly over a shorter stroke range. To ensure that the rifle meets the initial requirements with a firing rate of 950 rounds per minute, the suitable piston rod length should be between 1.3 to 1.5 inches according to the desired design specifications. The results from this analysis have been used for preliminary design and motion simulation, showing that the obtained values are consistent with theory, although there are still discrepancies that need to be addressed and further developed.

The Improvement Mechanical Properties of Pressure Tube by Induction Hardening Process

Suradet Chalermboon — 2025-02-04

The aim of this study was to explore the impact of induction hardening on the microstructure and mechanical properties of AISI 4130 steel improvement strength of pressure tube application. The primary objective is to enhance the strength of the tube ends, which are susceptible to failure due to excessive loads during service. However, due to the shape limitations of the pressure tube, traditional electric furnace hardening methods cannot be used to increase its strength. Therefore, there is a need to study induction hardening methods that can apply localized heat treatment. The investigation commenced use of finite element analysis to predict the result of the process. In experiments the samples were heated with a 15 kHz medium frequency induction hardening process, followed by water quenching. Subsequently, the samples underwent metallographic preparation, microstructural analysis, hardness testing and tensile testing. The findings revealed that the microstructure of Hardening Zone, HZ exhibited lath martensite and retained austenite in their microstructures. The average as-rolled was mechanical properties measured at 284.65 HV for hardness and ultimate and yield strength 749.39 MPa, 685.17 MPa respectively for tensile properties. In contrast, Hardening Zone, HZ containing lath martensite, experienced an approximately two-fold increase in mechanical properties compared to the as-rolled state. The finite element analysis results are closely align with experimental findings. Conclusion, induction hardening proved to be an effective heat treatment method for enhancing the mechanical properties of the AISI 4130 steel, as evidenced by the observed changes in microstructure and mechanical properties. The above method can be applied to improve the mechanical properties of pressure tube to application more responsive to usage. Furthermore, it confirms the usefulness of finite element methods in the design process.

3D Numerical Simulation of the Effect of Shaped Charge Liner Thickness on Penetration into a Steel Target

Tassanee Tubchareon — 2025-02-04

The explosion of a high-explosive charge in a shaped charge warhead rapidly converts the explosive material into gaseous products with extremely high pressure through a chemical reaction. This high pressure can damage the shaped charge warhead's structure, causing natural fragmentation of the casing and collapse of the liner, which leads to the formation of a jet. Generally, experimental testing of shaped charge detonation processes is more expensive and dangerous than computer simulations. This work presents three-dimensional (3D) numerical simulations of shaped charges based on the Smoothed Particle Hydrodynamics (SPH) method. The effect of liner thickness on jet formation and penetration depth into a steel target was investigated. The charge had a diameter of 36 mm (CD), and the stand-off distance was set to 3CD. The copper liners had uniform wall thicknesses of 0.5, 1.0, and 2.3 mm, based on the explosive-to-copper weight ratio, with a cone angle of 45°. The results showed that pressure increased after detonation and reached the liner within 4 microseconds. The maximum jet velocities observed were 10,780, 9,070, and 6,520 m/s for liner thicknesses of 0.5, 1.0, and 2.3 mm, respectively. Increasing the liner's thickness resulted in a decrease in the maximum jet tip velocity and jet length. Additionally, the slug size increased with liner thickness. Regarding the penetration performance of the shaped charge, all liner thicknesses successfully penetrated a 10 mm thick steel target. The effect of increasing the target thickness was also investigated. The liner thicknesses of 0.5, 1.0, and 2.3 mm were able to penetrate steel targets up to 7 mm, 10 mm, and 50 mm, respectively. The results demonstrated that the ability to penetrate the target increased with liner thickness due to the increased momentum balance and kinetic energy. However, as liner thickness increased, the borehole size decreased.

The The Improvement of High-temperature Silane Modified Phenolic Resins for Rocket Nozzle Insulation

Chatchaphon Sae-ngow — 2025-02-04

In this research, composite materials were studied and developed for application in the
aerospace industry. This project aims to develop thermal insulation materials for rocket motor nozzles.
Solid rocket motors are designed to withstand the high temperatures produced by combustion.
Thermal insulation materials based on phenolic composite materials have the properties of heat
resistance, ablation resistance at temperatures up to 3000๐
C, and good decomposition resistance,
which are the most commonly used. The properties of silane-modified phenolic resin (PR-S) were
studied in this study to improve ablation resistance, and the types and main chemical components
of the modified phenolic resin have been investigated using Fourier transform infrared spectroscopy
(FTIR) and hot compression molding techniques, respectively, to assess the ablation properties of
these composite materials. Standard experimental methods were employed to determine the
mechanical properties, radiographic tests, and static tests of the phenolic composite materials. According
to the FTIR analysis based on ASTM E1252-98, the energy absorption of polysiloxane (Si-O-Si) and silane
Si-O-C bonds was 1184.19 cm-1, which indicates the modification of silane in phenolic resins. Results
showed that the modified PR-S composites significantly increased ablation resistance based on ASTM
E285-08 test using oxyacetylene gas as a high temperature source. Modified phenolic resin materials
still possessed sufficient mechanical properties to meet the standard requirements. The radiographic
test results confirm the uniformity of the extruded insulation, and the static test results confirm the
ability of the modified phenolic composite materials to withstand the heat load generated by rocket
operation, with a confidence level of not less than 90%. Thus, the results of this research can be used
to confirm the potential for domestic production of parts and thereby to achieve true self-reliance.