Design Of Alarm System Research Articles

Optimizing multivariate alarm systems: A study on joint false alarm rate, and joint missed alarm rate using linear programming technique

In modern complex industrial systems, multiple process variables interact with one another. The role of alarm systems in ensuring the safety of these systems is of utmost importance. Consequently, there is an increasing value placed on the assessment of the performance of multivariate alarm systems. As the dimensions of the system and the number of variables grow, designing optimal parameters for the multivariate alarm system using traditional approaches such as probability density function estimation becomes increasingly convoluted. In this paper, an approximate method is proposed for calculating two indices known as the Joint False Alarm Rate (JFAR) and Joint Missed Alarm Rate (JMAR), which are used to evaluate the performance of multivariate alarm systems. These indices are computed using the multivariate Markov chain method. The Markov chain is constructed by solving an optimal Linear Programming (LP) problem. Subsequently, joint indices are defined based on steady state estimations of a multivariate Markov chain. To validate the theoretical results obtained on the JFAR and JMAR and to demonstrate the proposed performance assessment and alarm system design procedures, numerical example and an industrial case study are provided.

Automatic device arrangement and wiring for fire alarm systems in metro stations: A case study

Fire alarm systems in metro stations play an important role in safeguarding lives and properties. The design process for these systems is complex and time-consuming due to the diversity of device types, wide distribution of device locations, and numerous compulsory design codes. This paper proposes an automatic design framework for fire alarm systems aimed at enhancing design efficiency. The framework includes five automated processes: information preprocessing, device arrangement, system loop generation, device wiring, and result generation. By converting the computer-aided design (CAD) results into building information models (BIM), building information and related professional device information are obtained, addressing the need for fire alarm system (FAS) design to integrate with multiple disciplines. The process can also automatically arrange FAS devices according to design specifications. Optimization algorithms, such as Ant Colony Algorithm and Prim Algorithm, are used to determine the device connection order and solve the problems of obstacle avoidance and orthogonal connections between two points. Compared to traditional design methods, the proposed automatic design framework for fire alarm systems in metro stations can not only satisfy the mandatory design requirements but also avoid the cumbersome and repetitive design process, providing new solutions for designers. Additionally, it can reduce wire length and save on construction costs. Using a real metro station as a case study, it is calculated that the automatic design can save between 8 % and 48 % of the wire length.

Cloud platform-based design of automatic monitoring and alarm system for integrated meteorological observation

This study designs an automatic monitoring and alarm system for integrated meteorological observation based on the cloud platform to improve the automatic monitoring ability for integrated meteorological observation and the operation and maintenance management level of meteorological departments. A meteorological data collector was used to collect comprehensive meteorological observation data, transmit the collected comprehensive meteorological observation data to the main control processing module, preprocess the comprehensive meteorological observation data, and finally transmit the pre-processed comprehensive meteorological observation data to the cloud service module through the data transmission module. In the cloud service module, cloud computing and an improved K-means algorithm were used to analyze the comprehensive meteorological observation data, mine abnormal comprehensive meteorological observation data, and send alarm information to the application module. Users can view the comprehensive meteorological observation data in the cloud server on the client in real-time, thus realizing automatic monitoring and alarm for comprehensive meteorological observation. Results show that the average transmission rate of various meteorological comprehensive observation data transmitted by the system is as high as 99.48%, thereby achieving clustering of abnormal meteorological comprehensive observation data. Upon detecting abnormal meteorological data, the system sends alarm information to the mobile phone client to complete the monitoring of abnormal meteorological information.

Design of anti-theft alarm and fire detection system based on IoT cloud platform

This time for a STM 32 single chip computer as the core of the intelligent home system of anti-theft alarm system for a detailed design, It aims to provide a comprehensive understanding of the hardware composition, software design and implementation principles of the smart home system, And analyze its advantages and disadvantages, Thus better providing intelligent early warning for human beings, Prevent the emergence of emergencies, Saving the lives and property of the people, The security information of the user can be monitored remotely, It can also turn it off via a button, In the anti-theft mode, You can also use an infrared sensor module installed in the human body to detect whether there is anyone in the home, So as to achieve the purpose of fire and fire prevention and theft. On this basis, a residential intelligent management system based on wireless communication is designed. The OLED LCD screen can display the currently detected temperature and the density of the flue gas, and use the button to set an upper alarm limit. When the detected temperature or smoke content exceeds the upper limit, the LED indicator light will light up and issue an alarm. Also, there is an emergency button to send out a distress signal at any time.

Design of Environmental Monitoring and Alarm System Based on Microcontroller

With the development of society, the improvement of science and technology, and the continuous optimization of production and life, people's living standards are also constantly improving. Therefore, people are starting to pay more and more attention to the comfort level of indoor environment. Housing is not only a place for family reunion and living, but also an important material guarantee for people's lives. However, with the rampant use of decoration materials and the increasing popularity of daily necessities, the hidden dangers of the living environment have greatly increased. Indoor environmental pollution has become one of the serious killers affecting modern human health, seriously affecting people's production and life. Therefore, it is particularly important to monitor the indoor environment, which not only needs to sensitively detect the concentration of various harmful gases, but also has an alarm function to constantly remind of dangers. The main functions of this design include: Connecting the microcontroller with temperature, humidity, and gas sensors to achieve real-time collection and reading of indoor temperature and humidity values, as well as monitoring gas concentration, and achieving the expected results. The display circuit was designed using LCD. The buzzer alarm function was used to automatically alarm when the gas concentration and temperature/humidity values exceeded the set standard values. When the temperature and humidity exceed the limit, the LCD display can immediately prompt and combine with LED alarm. When the gas concentration exceeds the limit, LED alarm is used.

Design of high-precision displacement safety monitoring and three-dimensional spatial alarm system for Beidou based on intelligent algorithms

The purpose of this study is to design a system that can monitor the displacement changes of engineering structures in real time and provide timely alarms when abnormal displacement is detected, in order to provide efficient safety monitoring and early warning functions and reduce the safety risks of engineering structures. The study adopted a combination of intelligent algorithms and the Global Satellite Navigation System (Beidou). By installing high-precision displacement sensors, monitor the displacement changes of the engineering structure. Then, intelligent algorithms are used to analyze and process the data collected by the sensors in real time, in order to extract the characteristics of displacement changes. At the same time, combined with the positioning data of the BeiDou navigation system, high-precision displacement monitoring is achieved. When the monitoring results exceed the set threshold, the system will automatically trigger an alarm mechanism to promptly notify relevant personnel for processing. Through experiments and comparative analysis, the Beidou high-precision displacement safety monitoring and 3D spatial alarm system based on intelligent algorithms designed in this study can effectively monitor and alarm displacement changes. The system has the characteristics of high accuracy, real-time performance, and reliability, which can timely detect displacement anomalies and provide reliable safety monitoring and warning functions.

Design and implementation of domestic dual-SIM telesecurity alarm system using voice code recognition

Violent crime cases which include, robbery, rape, and homicide are terribly on the rise, and the role of security in combating this menace cannot be overemphasized. This research presents a security device that aims at fighting violent crimes using voice recognition technology. The work also tends to solve the issue of network downtime when the user is out of reach for help in time of attack. In this work, a voice processing unit which comprises the condenser microphone, an amplifier, a shift register, and a timer was designed. The processing unit circuit was incorporated into microcontrollers which create Human-Device interaction and the GSM communication unit which is made up of two GSM modules. The two microcontrollers used in the design are PIC18F4520 and PIC16F873A. The microcontrollers were programmed with C++ using the MPLAB IDE software and the circuit simulation was done using Proteus Design Suite version 8. The result shows that the appropriate authority receives SMS whenever the pre-recorded code is mentioned. The result also shows that during network downtime, the second GSM module sends an SMS to the appropriate authority. Evaluating the performance of this work, it was observed that the device works best in a calm area compared to a noisy area. This work is designed to work in domestic areas like homes, offices, malls, and mainly areas free from so much noise. Therefore, this work has successfully reduced the crime rate in emergencies.

Design of Intelligent Street Lamp Control and Fault Alarm System Based on NB-IOT

Design of Intelligent Street Lamp Control and Fault Alarm System Based on NB-IOT

Design and research of suburban railway fire alarm system

With the rapid development of suburban rail transit, fire safety issues have received more and more attention. As the first line of the Shanghai Suburban Railway, the fire safety problem of the Shanghai Suburban Railway Airport Link Line is more prominent. In this paper, an automatic fire alarm system is designed and researched for the fire safety problem of the Shanghai Railway Airport Liaison Line, which adopts a hierarchical distributed structure and can realize accurate fire detection thorough immediately sending fire alarm information to the station control room and line operation control center and informing the location of the fire area. At the same time, the system also coordinates with the BAS system and ISCS system or independently realizes the linkage control of fire fighting equipment. The research results of this paper are of great significance for improving the fire safety level of Shanghai railway airport links.

Observing sources of system resilience using in situ alarm simulations.

Alarm fatigue (and resultant alarm nonresponse) threatens the safety of hospitalized patients. Historically threats to patient safety, including alarm fatigue, have been evaluated using a Safety I perspective analyzing rare events such as failure to respond to patients'critical alarms. Safety II approaches call for learning from the everyday adaptations clinicians make to keep patients safe. To identify such sources of resilience in alarm systems, we conducted 59 in situ simulations of a critical hypoxemic-event alarm in medical/surgical and intensive care units at a tertiary care pediatric hospital between December 2019 and May 2022. Response timing, observations of the environment, and postsimulation debrief interviews were captured. Four primary means of successful alarm responses were mapped to domains of Systems Engineering Initiative for Patient Safetyframework to inform alarm system design and improvement.

Design and Implementation of Ground Meteorological Data Storage Alarm System for Other Provinces

The provincial information center receives meteorological data from other provinces through satellite broadcasts. In response to the low efficiency and inability to promptly address issues such as data nonexistence and data loss caused by malfunctions in the manual monitoring mode, an analysis of the data transmission process and user access methods was conducted. Based on the Python language, a ground meteorological data storage alarm system was developed for the Northwestern region. This system enables real-time monitoring of the storage status of hourly ground data, facilitates the generation of statistical reports on missing station information within any given time frame, and promptly sends alarm notifications via enterprise WeChat. The results indicate that this system assists operational and maintenance personnel in promptly identifying and addressing faults, ensuring the orderly and timely storage of meteorological data from the Northwestern region into the local database and thereby providing users with higher-quality data services.

GSM Based Fire Alert System

Abstract: A fire alarm system is essential for maintaining and monitoring the safety of all types of environments and situations. However, the usability of many existing fire alarm systems is well known, but production could be expensive. As a result, it is out of reach for low-income users. The primary goal of this project is to create a low-cost fire control system. The detection system, the monitoring system, and the appliance system are the three main systems in the project. The detection system serves as a fire and smoke detector. This paper describes the design and implementation of a fire alarm system using the Arduino UNO as the system's controller. The detectors are arranged in parallel at various levels. A fire alarm system is critical for ensuring the safety of all types of environments and situations. The usability of many existing fire alarm systems is well known, but production may be costly. As a result, low-income users are unable to access it. This project's primary goal is to develop a low-cost fire control system. The three main systems in the project are the detection system, the monitoring system, and the appliance system. The detection system also functions as a smoke and fire detector. The design and implementation of a fire alarm system using the Arduino UNO as the system's controller is described in this paper. The detectors are parallel-arranged at various levels.

Design and Implementation of Fire Prevention and Anti-Theft Alarm System Based on Single-Chip Microcomputer

With the advancement of the times, the living conditions of people have improved significantly, and high-rise buildings and comprehensive buildings have risen from the ground. Once these buildings are caught in a fire or theft, they will cause great losses to people's life safety and property safety. There are many alarms on the market that solve security risks, but their functions are relatively single and the cost is high. This paper designs a fireproof and anti-theft intelligent alarm system based on a microcomputer to address the issues, using a smoke sensor, a temperature sensor, a pyroelectric infrared sensor to achieve fireproof and anti-theft functions. This paper analyses the requirements and the hardware circuit module of the fire and anti-theft system, designs the system software, and introduces the software design ideas. Based on simulation software, tests were carried out to verify the feasibility of the proposed design. The fireproof and anti-theft system in this paper can detect the leakage of combustible gases, the sudden rise in temperature and the function of human body intrusion, and automatically alarm. The system in this paper has low cost and can expand the function, which helps to protect people's lives and property safety, and has high practical significance.

Heart Like a Bell. Voice Alarm Control and Indicating Equipment

Cel: The aim of this article is to make an overview of selected features of the voice alarm control and indicating equipment (VACIE) confirmed in the process of assessment and verification of constancy of performance. Information presented by the authors play a crucial role during the process of design and use of voice alarm systems as well as in the context of providing the safety of buildings. Wprowadzenie: Control and indicating equipment (CIE) is extremely important for the safety of buildings, affecting both the safety of the occupants and the property stored there. Given such an important role, special emphasis is placed on the reliability of the system’s operation, whose task is both to detect the fire danger early enough but also to transmit information to its various components. An important role in ensuring the safety of construction objects is the transmission of information about the threat detected by the system to the occupants of the facility. This information can be communicated through the use of, among other things, automatic visual signalling implemented by VAS. The main component of VAS is the voice alarm control and indicating equipment, which, as the heart of the system, receives and transmits information to individual elements (loudspeakers), and is responsible for their operation – powering and monitoring them. Metodologia: An overview of selected features that are confirmed in the process of assessment and verification of constancy of performance, Introduction to the testing process of selected features, which is an integral part of the conformity assessment of construction products. The article was supplemented with issues related to the design and maintenance of fire alarm systems. Wnioski: Voice alarm control and indicating equipment, in addition to control and indicating equipment, not only determine the safety of the buildings themselves, but also affect the safety of their occupants, who, as a result of various circumstances, may have to be forced to quickly and efficiently leave their place of residence. Nevertheless, the awareness of owners and managers of construction objects equipped with VAS should be important, since their special attention should be directed to maintaining all components of the system in such a condition that will enable the complete installation to fulfil its functions. An important element is the continuous education of service personnel and users of the facility (e.g. step-by-step evacuation drills), in order to maintain knowledge at the highest possible level about how to act in an emergency situation, not only related to fire, but also in the face of other local threats. Słowa kluczowe: evacuation of buildings, voice alarm system, VACIE

Design and Analysis of Building Automatic Electrical Fire Alarm System

Design and Analysis of Building Automatic Electrical Fire Alarm System

Quantitative Study on Road Traffic Environment Complexity under Car-Following Condition

With the development of the drive of electronic communication technology, the driving assistance system that perceives the external traffic environment has developed rapidly. However, when quantifying the complexity of the road traffic environment without fully considering the driving characteristics and subjective feelings, the false alarm rate of the driving warning system increases and affects the early warning effect. In order to more accurately quantify the complexity of the road traffic environment, we analyzed the impact of road traffic environment changes on drivers under the condition of car-following. Firstly, we selected the influencing factors of the traffic environment complexity, such as the driving operation indicators, the vehicle driving status indicators and the road environmental indicators. The weight calculation model of each influence factor is established based on the principal component analysis method. Secondly, the driver’s reaction time during car-following is used as the quantitative index of road traffic environment complexity. The quantitative model of road traffic environment complexity is constructed combined with the weight of road traffic environment complexity. Finally, the driving simulation experiment is designed to verify the complexity quantification model of the road traffic environment. The road traffic environment complexity value calculated in our study is better than the TTC, and the early-warning threshold is raised by 2–5%. The research conclusion can provide a basis for the design of the car alarm system.

Design of serial alarm systems based on deadbands and delay timers for removing false alarms

Alarm deadbands and delay timers are widely used in practice to remove false alarms. This paper proposes a method to design serial alarm systems that are composed of alarm deadbands serially followed by delay timers. Serial alarm systems are effective for removing false alarms with different types of alarm deviations and alarm durations, while alarm deadbands or delay timers alone are suitable only for one type of false alarms. A minimization problem is formulated to simultaneously design optimal values of the alarm deadband width and delay timer factor, for achieving a desired ratio of false alarms to be remove. Bayesian estimation approach is exploited to resolve a main technical challenge in achieving reliable estimates of joint probabilities of alarm deviations and alarm durations. Existing methods are confined to the isolated design of alarm deadbands or delay timers based on probability density functions of process variables, and are subject to a restrictive assumption that process variables are independent and identically distributed. By contrast, the proposed method is for the joint design of serially-connected alarm deadbands and delay timers; it is based on joint probabilities of alarm deviations and alarm durations, and does not require the restrictive assumption. Numerical and industrial examples are provided to illustrate the proposed method and compare with existing ones.

Evidence fusion-based alarm system design considering coarse and fine changes of process variable

In view of the coarse and fine changes of process variable in industrial systems, this paper introduces a univariate alarm design method based on dynamic evidence fusion. Firstly, in order to describe the coarse statistical characteristics of historical sample data, the multi-transition data segmentation based on memory and forgetting strategies and the referential evidential matrix (REM) construction are presented. Secondly, the real-time sample of process variable is transformed into alarm evidence by matching with REM, and then such multiple pieces of alarm evidence continuously acquired in time are fused by evidence reasoning (ER) rule with the interval-valued fusion weights and reliabilities of alarm evidence, so as to accurately adapt the fine change of process variable. Finally, numerical experiment and motor rotor alarm experiment are implemented to validate that the proposed method has better performances than traditional alarm design methods.

Design of leakage prevention and diversion alarm system based on wireless control

Abstract To solve the leakage of contrast agents due to high pressure and fast speed of the high pressure injector, an intelligent anti-leakage system is designed. The pressure sensor MS5837 detects the pressure signal in real time and transmits the pressure signal to MSP430F5529. Once the micro controller detects that the pressure exceeds the threshold value, the leakage of the contrast agent is judged. The controller immediately starts the sound and light alarm and diversion switch function, and informs the medical staff of the clinic to deal with the leakage wound in time through the wireless transmission chip NRF24L01+. This system overcomes the disadvantages of previous mechanical design, such as easy loosening, no diversion. It adds diversion switching function and wireless communication module, which ensures that medical stuff can deal with the wound in the first time without radiation and reduce the leakage damage to the minimum. The results of animal experiments show that the intelligent diversion alarm system is stable, reliable and highly sensitive, which can effectively reduce the leakage of the contrast agents of the high pressure injector and relieve the pain of the patient.

Research on the Design of Fire Power Distribution and Fire Alarm System in Building Electrical Design

Research on the Design of Fire Power Distribution and Fire Alarm System in Building Electrical Design