LASER SECURITY SYSTEM

Mr. P Muralikrishnan¹, pmuralikrishnanece@krce.ac.in

Faculty, Department of ECE, K. Ramakrishnan College of Engineering

Kiruthika D², Akila M³, Harina M D⁴, Kanishka V D K⁵,

²kiruthikamoorthi31@gmail.com, ³akilamanimaran02@gmail.com, ⁴harinadhanarajmd@gmail.com, ⁵kanishkadineshkumar8@gmail.com, Student’s, Department of ECE, K. Ramakrishnan College of Engineering

Abstract: - The need for strong and dependable security systems has never been greater, resulting in the development and deployment of a Laser-Based Security System (LBSS). This system is based on laser technology principles, featuring a series of laser emitters and detectors positioned around the boundary of the protected area. When an unauthorized person disrupts the laser beam, this interruption activates an alarm or alert system, indicating unauthorized entry. Notable characteristics of the LBSS include adaptability, expandability, and high precision. Laser security alarm systems play a crucial role in maintaining safety and protection across residential, commercial, and industrial spaces. These systems utilize laser diodes and photodetectors to form an invisible barrier, sounding an alarm in the event of any intrusion attempt or breach. The incorporation of IoT facilitates remote surveillance and control through internet-connected devices, increasing the efficiency and responsiveness of security measures. Immediate notifications and data evaluation enhance safety, protect lives and property, and enable users to act swiftly, thus improving the overall security framework. In this security initiative, laser light is utilized for safeguarding purposes, with the transmitting side consisting of dry cell batteries and a toggle switch. The receiving end features a focusing LDR sensor that detects the laser beam, linked to the main driver circuit, which comprises two components: the signal of interrupted ray and the alarm circuit. The alarm will sound continuously until the off button is pressed, offering two modes of operation: a preset timer or manual reset.

Keywords: Laser-Based Security System (LBSS), Intrusion Detection, IoT Integration, Real- Time Monitoring, Alarm System, Low Power Consumption, Remote Accessibility

I. INTRODUCTION

Laser security systems are a cost-effective and easy-to-install solution for robbery and burglary cases. They are particularly useful in highly confidential areas where only authorized individuals can enter. Laser light is visible at the source and incident point only, making it visible only at the incident point. When the laser beam is disrupted, the main entry of the secure area automatically shuts, confining the individual inside. Laser security alarm systems improve safety by detecting unauthorized access or infringements. They utilize laser diodes alongside photo detectors to form an invisible barrier that activates an alarm when interrupted.

Integration with the Internet of Things (IoT) enables remote supervision and control of laser security systems, offering live data and notifications on smartphones or other internet-enabled devices. The information gathered from these systems can be analyzed to recognize trends and enhance security measures over time. Utilizing IoT in laser security alarm systems marks a significant leap in security technology, delivering a dependable, effective, and scalable solution for monitoring and managing security violations, safeguarding lives and property while promoting a more secure environment.

It is a low-cost system with low power consumption. In today's digital world, security is the most important factor, and the laser-based security system can help overcome this problem by making the intruder unaware of the system being installed in entry positions like doors or windows.

II. LITERATURE REVIEW

In recent times, Yash Pathak (2024) proposed laser security alarm system enhances security by integrating breach detection, real-time monitoring, and automated responses through a microcontroller like the Arduino Nano. It utilizes laser diodes and photodetectors to form an invisible barrier that identifies unauthorized access. When a breach is detected, the system triggers alarms, lights, or sends notifications through GSM.

Sujan Banerjee, Priyanka Dutta, Sudip Kr. Bid (2024) developed security project utilizing laser technology involves a transmitter and receiver system. It detects interruptions in the laser ray to trigger an alarm, designed for low cost and high performance. Sudarshan B, Harshitha S, Janhavi K P (2021) developed a laser-based security system that utilizes an ESP32 CAM to capture intruder photos when a laser beam is interrupted by an LDR sensor. Notifications and captured images are sent to a Wi-Fi connected device through the Blynk Application. This system allows users to monitor and take additional photos remotely, ensuring security regardless of the device's status.

Priya Kumari, Akella Vandana, Ankita Kumari (2023) Smart home technology integrates devices through networking for improved living quality. The project aims to create an affordable smart home automation system for securing and monitoring appliances. It outlines goals for a smart home energy management system, detailing definitions, applications, and component manufacturing. Dr. Sachin Sambhaji Patil (2024) proposes a modern security infrastructure that requires the integration of intrusion detection systems (IDS) to safeguard sensitive areas.

III. MATERIALS AND METHODS

The project on Fault Detection in Transmission Lines utilizing a Relay Module, Thermistor Sensor, and Transformer aims to explore the electrical elements and methods employed for identifying faults in transmission lines. A relay module functions as an electrical device for switching and managing electrical circuits, whereas a thermistor sensor monitors temperature during fault occurrences. The transformer is an electrical device that facilitates the transfer of electrical energy from one circuit to another through the process of electromagnetic induction.

The laser transmitter emits a continuous laser beam, typically in the infrared spectrum, with the receiver positioned to detect the laser beam emitted by the transmitter. The alarm unit activates the alarm when the laser beam is interrupted. The system is powered by electricity or batteries and uses a laser transmitter to emit a narrow and focused laser beam, typically in the infrared spectrum. The laser beam is colorless and travels from one to the other without interference.

The Interruption Detector detects when an intruder or object crosses the path of the laser beam, interrupting it. The system can be set to trigger an alarm under various conditions, such as complete blocking, partial obstruction, or reflection off a surface. Once the laser receiver detects an interruption in the beam, it sends a signal to the alarm unit, which can produce an audible alarm, activate lights, or send a notification to a security system.

Fig 1: Block Diagram

Fig 2: circuit diagram

After the alarm is triggered, the system needs to be reset manually or automatically, typically ensuring that the laser beam path is clear again. Laser security systems are used in various applications, such as protecting valuable assets, securing perimeters, or monitoring high- security areas. Key advantages of laser security alarm systems include accuracy, reliability, and the ability to cover long distances with a single laser system. In this study, the literature review approach was utilized during the planning and design phases of the LDR light sensor, which was combined with software to control the security system based on LDR.

V. RESULT AND DISCUSSION

The laser security system using a 555 Timer IC was successfully built and worked as expected. When the laser beam hit the LDR, the circuit stayed stable, and the buzzer remained off. If the laser beam was interrupted, the LDR’s resistance increased, causing the 555 Timer to activate and sound the buzzer immediately. The circuit responded quickly, operating effectively in monostable mode. The detection range was about 2–3 meters, depending on factors like alignment and light intensity.

Proper alignment between the laser and LDR was vital for effectiveness, as even slight misalignments could decrease sensitivity. The system performed best in indoor settings, as strong external light could affect the LDR’s response. The timing components allowed for adjusting the alarm duration, offering flexibility in design. Overall, the system was low-cost, energy-efficient, and reliable, making it suitable for small-scale security and automation uses.

Fig 3: Result

The laser security system using a 555 Timer IC was built successfully and functioned as planned. The circuit remained stable with the laser beam hitting the LDR, keeping the buzzer off. If the laser beam was interrupted, the LDR’s resistance increased, activating the 555 Timer to sound the buzzer quickly.

Proper alignment of the laser and LDR was crucial for the system’s effectiveness. Even slight misalignments could reduce the sensitivity of the detection. The system worked best indoors, as strong external light could disrupt the LDR’s response.

The detection range of the system was between 2–3 meters, influenced by factors such as alignment and light intensity. The design also allowed for adjustments to the alarm duration, providing flexibility. Overall, the system was low-cost, energy-efficient, and reliable. It is suitable for small-scale security and automation purposes. The quick response time and effective operation in monostable mode added to its reliability.

CONCLUSION

The Laser Security System using 555 Timer IC detected interruptions in a laser beam and triggered an alarm. It successfully demonstrated a simple, reliable, and low-cost intrusion detection circuit. The 555 Timer IC showed versatility in timing and pulse generation for security. The system was energy-efficient, easy to assemble, and quick to respond. It allowed practical experience with optoelectronic sensors and can be expanded with more sensors. Future versions may include microcontrollers or wireless alerts, and sensitivity can be improved with better alignment. This project illustrates the effective use of basic electronic components in security systems.

REFERENCES

[1] Yash Pathak, Suraj Kumar, Aryan Raj, Yash Singh, Associate Professor Arun Patel "Laser Security Alarm System" Lakshmi Narain College of Technology, Bhopal, India (2024)

[2] Sujan Banerjee Lecturer, Priyanka Dutta, Sr. Lecturer, Sudip Kr. Bid,Sr. Lecturer "Low-Cost Laser Security System with Intrusion Detection and Alert Mechanism" Swami Vivekananda School of Diploma (2024)

[3] Dr. Sachin Sambhaji Patil "Intrusion Detection Laser Guard System For Security Purpose” (2024)

[4] Sudarshan B, Harshitha S, Janhavi K P "Laser Based Security System" Assistant Professor, Department of ECE, K.S Institute of Technology (2021)

[5] Priya Kumari, Akella Vandana, Ankita Kumari "Laser light security using IoT" Department of Physics and Computer Science, Dilbagh Educational Institute (2023)

[6] Raj, P. Gupta, and T. Singh, “Smart Laser Security System Using IoT,” International Journal of Combined Research and Development (IJCRD), pp. 1023-1027, 2020.

[7] S. K. Reddy, B. Srinivas, and M. Chandra, “Microcontroller Based Laser Security Alarm Using GSM Module,” Worldwide Journal of Electrical and Electronics Research, Vol. 5, Issue 1, pp: 195-200, January-March 2021.

[8] Hemane, Harshal, and Debarati Sen. "Laser based security system for home." LASER 5, no. 01 (2018).

[9] Hashim, H. M. B.., & Hussain, D. M. A. (2018)” Security System via LDR” Journal of Applied Engineering &Technology (JAET), 2(2), 20–30.

[10] A. Rai, M. Rai, N. Jogi, B. Rai, S. Rai and D. Rasaily, "Low-Cost Laser Light Security System in Smart Home," 2019 International Conference on Innovative Sustainable Computational Technologies (CISCT).

[11] Raviraj, K., and N. Phaneendra. "Laser security alarm system" IJRAR-International Journal of Research and Analytical Reviews (IJRAR) 7, no. 2 (2020): 629-632.