scholarly journals Design of Intelligent Home Security Alarm System under STC89C51 Single Chip Microcomputer

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Ruizheng Wang ◽  
Xuan Liu ◽  
Xinhao Huang

in order to improve the security of home residence, this paper studies and designs an intelligent home security alarm system, using STC89C51 single chip microcomputer as the main controller of the security system, and real-time monitoring by controlling the human pyroelectric infrared sensor and smoke sensor in the case of strangers invading the security range and showing signs of fire. Once the abnormal situation is found, the intelligent home security alarm system will start the acousto-optic alarm prompted by the LED lamp and pass through the information processing system of the GSM module. Send an abnormal text message to the user of the security system at the first time face, and finally realize the purpose of modern intelligent home security alarm.

2013 ◽  
Vol 336-338 ◽  
pp. 2443-2446 ◽  
Author(s):  
Gui Shu Xia

In order to improve the security of home, an intelligent home security alarm system based on Micro-programmed Control Unit (MCU) has been designed in this paper, which can monitor the doors and windows, and communicate with intrusion alarm system by using GSM. Practical measured results indicate that this system can complete the function of home security alarm, which has a strong practical popularize value.In order to improve the security of home, an intelligent home security system based on MCU has been designed in this paper, which realizes en-mg checking, password storage, sound/short message warning service and real-time monitoring through GSM network. The hardware and software designs are illustrated in the paper. Finally, the test is carried out and the results indicate that the functions of system have achieved the design goal.


2021 ◽  
Vol 2113 (1) ◽  
pp. 012057
Author(s):  
Yang Wang ◽  
Lichun Han ◽  
Yonghui Zhao ◽  
Yuquan Xue ◽  
Liming Wang

Abstract With the rapid development of society and economy, various laboratories have become more complete in number and equipment, but subsequent laboratory accidents frequently occur. Therefore, it is imperative to construct a laboratory safety management system to ensure the safety of laboratory personnel and complete equipment. This article intends to design a smoke alarm, which mainly includes measuring the sensitivity of the smoke sensor to the concentration of smoke in the air, and the linear change of the sensor converting the corresponding analog signal into a digital signal. By designing the fan speed to be controlled by the change of smoke density, the speed of the motor is adjusted. And the alarm module can sound an alarm when the smoke concentration is certain, and at the same time, it can automatically cancel the alarm when the smoke concentration decreases. Finally, a simulation experiment is designed to simulate the effect of the sound alarm of the smoke alarm disperser on the dispersal of smoke under different working environments.


This paper presents an enhanced methodology in implementing and designing a security system for door locking purpose based on fingerprint, GSM technology, monitoring camera, alarm system and password system. This security system will provide enough security by limiting unauthorized people access and taking a record of those who pass through it. Sometimes unauthorized people or burglars try to break the door for evil intentions at a time when no one is available at a targeted place, so this paper introduces some security solutions for that problem and they are the main contribution of our paper. We introduce an alarm system to alert the people at the surroundings, GSM module that’s used to send an SMS message to the registered user’s (responsible person) and a web camera that’s used to take a video for a person who tries to break the lock, password keypad that’s used after fingerprint sensing to provide extra security. Definitely the registered users are the only persons who can access the lock, and the door closes after five seconds from the opening time. The method used to implement this experiment involves the use of a fingerprint scanner R305 that’s interfaced with Arduino microcontroller-ATMEGA328P to control the locking and unlocking process of a door. During all the opening and closing processes, the16x2 Liquid Crystal Display (LCD) displays some commands which can be used to instruct the users like, place your finger on the sensor, the door is opened, the door is closed, the message is sent, please enter the password etc. If an unregistered user tries to access the door using their fingerprints, automatically his/her access is denied. The proposed door lock security system is can be used at homes, offices, banks, hospitals, and in other governmental and private sectors. Our proposed system was tested in real-time and has shown competitive results compared to other projects using RFI and password.


2013 ◽  
Vol 648 ◽  
pp. 281-284
Author(s):  
Juan He ◽  
Shuai Kang

The intelligent telephone alarm system is designed with a single chip microcomputer as the core of system,and the intelligent system is controlled by AT89C51. A telephone network is used as transmission of voice digital information in the system. The telephone alarm is composed of a single-chip microcomputer control, sensor and signal input circuit, and DTMF send and receive circuit, voice controlling and receiving circuit, alarm telephone circuit. According to the different sensor output signal, it can send out different alarm information to realize remote monitoring function.


2014 ◽  
Vol 701-702 ◽  
pp. 1205-1209
Author(s):  
Shi Xue Gu

In this paper, a multi-purpose alarm system for dormitory based on control conducted by AVR single-chip microcomputer is designed and produced, which aims at potential safety risks existing in dormitories of colleges and universities at present. This system uses multiple sensors to realize detection of human body, smoke, access of people and valuables, after which signal will be processed and AVR single-chip microcomputer will then be used to realize automatic control. Host computer receives information from slave computer and then realize long-distance and real-time monitoring. Test result indicates that this system functions well and can realize security of student dormitories if applied, which can raise audible and visual alarm in case of abnormal situation and realize cancel of alarm through entering password on a keyboard.


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