Design of Embedded Indoor Multiple Dangerous Gas Detection Alarm System

2013 ◽  
Vol 475-476 ◽  
pp. 209-213
Author(s):  
Hong Fang ◽  
Lin Cai Deng
Keyword(s):  
Operating System ◽  
Embedded System ◽  
Real Time ◽  
Remote Monitoring ◽  
Gas Detection ◽  
Alarm System ◽  
Communication Interface ◽  
Real Time Operating System ◽  
Arm Processor ◽  
The Core

This paper describes a embedded system,using ARM processor LPC2148 as the core of hardware,and using MQ series gas sensor as the detection component,and using ENC28J60 as the network communication interface,and using uc / OS-II real-time operating system as software platform for the real-time remote monitoring of density of harmful gases indoor.In this system,voltage signals from MQ sensor will be processed by the ARM micro-controller and be displayed in the LCD.Then they will be compared with the set voltage value.If they are greater than the set value,sound and light alarm will be touched off,and data will be transfered to the network through the ARM ENC28J6 network interface.Above all,the system is able to achieve accurate detection, alarm and remote monitoring indoor dangerous gases.

Design and Research on the Gas Monitoring System Based on LabVIEW

2013 ◽  
Vol 427-429 ◽  
pp. 1254-1257
Author(s):  
Kuan Gang Fan ◽  
Xin Zhang ◽  
Qing Mei Cao ◽  
Ying Fei Sheng ◽  
Le Ping Zheng
Keyword(s):  
Monitoring System ◽  
Gas Sensors ◽  
Remote Monitoring ◽  
Gas Detection ◽  
Alarm System ◽  
Gas Monitoring ◽  
Gas Concentration ◽  
The Core ◽  
Housing Environment ◽  
Semiconductor Gas Sensors

Gas detection alarm system plays a more and more important role in People's Daily life and every field. This paper proposes semiconductor gas sensors and SCM as the core, which could achieves the gas concentration monitoring and alarm functions. The gas monitoring system includes host computer that consists of LabVIEW operating interface and slave computer that constructed with AT89C51 microcomputer and MQ-2 gas sensor.It achieves remote monitoring and controlling housing environment in real-time and has a certain practical value in society.

Error Detection and Correction System (EDAC) of On Board Data Handling (OBDH) in Real Time Operating System Behaviour

2019 ◽  
Vol 10 (2) ◽  
pp. 17
Author(s):  
Haryono Haryono ◽  
Agfianto Eko Putra ◽  
Jazi Eko Istiyanto ◽  
Agus Harjoko
Keyword(s):  
Operating System ◽  
Real Time ◽  
Error Detection ◽  
Data Handling ◽  
System Error ◽  
Real Time Operating System ◽  
The Core ◽  
Core Function ◽  
Error Detection And Correction ◽  
Correction System

The satellite requires the support of a robust sub system. On Board Data Handling (OBDH) is the core function of the satellite subsystem and has to be error free in managing the operation of the satellite. It should withstand the harsh environmental conditions in space that has a lot of hazards caused by radiations. In view of these two conditions, the OBDH design should be able to manage the operation and overcome the hazards of radiation. In order to manage the operation Real Time Operating System (RTOS) was applied. RTOS was able to manage the task efficiently and effectively. In the aerospace domain, RTOS has become popular because of its strength in managing the operating system. Error Detection and Correction System (EDAC) system was applied to make OBDH more robust. This paper discusses the implementation of the EDAC system in tandem with the RTOS behaviour to manage the operation and increase the robustness of the system. The findings show that OBDH can be programmed successfully using RTOS to handle critical and robust operations.

A Review of the Scopes and Challenges of the Modern Real-Time Operating Systems

2018 ◽  
Vol 9 (1) ◽  
pp. 66-82 ◽  
Author(s):  
Amit K. Shukla ◽  
Rachit Sharma ◽  
Pranab K. Muhuri
Keyword(s):  
Operating System ◽  
Embedded System ◽  
Real Time ◽  
Task Scheduling ◽  
Operating Systems ◽  
Computational Cost ◽  
Dynamic Environments ◽  
Real Time Operating System ◽  
Starting Point ◽  
Design Challenges

A real-time operating system (RTOS) is an integral part of a real-time embedded system (RTES). Most of the RTESs work on dynamic environments, and hence, the computational cost of tasks cannot be calculated in advance. Thus, RTOSs play a significant role in the smooth operations of the RTES through efficient task scheduling schemes and resource managements. This article investigates the existing design challenges and scope of the modern RTOSs. A wide variety of latest RTOSs are discussed and elaborated in detail. A comparative study with their prospects has been explained so that interested readers can use the article as a readily available starting point for their further studies on this topic.

Design and Research of Embedded Internal Grinding NC System Based on μC/OS-II

2009 ◽  
Vol 416 ◽  
pp. 34-39 ◽  
Author(s):  
Ou Xie ◽  
Hua Li ◽  
Yan Li
Keyword(s):  
Operating System ◽  
Embedded System ◽  
Real Time ◽  
High Precision ◽  
Control Process ◽  
Real Time Operating System ◽  
Nc System ◽  
Internal Grinding ◽  
Soft Plc ◽  
Time Requirements

According to the requirement for high-precision and processing features of the internal grinding, the hardware and software of an internal grinding NC system based on embedded system were presented. The classification and implementation of several key system tasks controlled by real-time operating system uc/os-ii were given, and the control process of the machine switch by soft PLC technology was elaborated on in the system. According to the real-time requirements of internal grinding NC system, the tasks of the system were prioritized reasonably, and some methods for enhancing the capability of real-time and improving the accuracy of the system were presented with software technology.

scholarly journals Error Detection and Correction System (EDAC) of On Board Data Handling (OBDH) in Real Time Operating System Behaviour

2013 ◽  
Vol 10 (2) ◽  
pp. 17
Author(s):  
Haryono Haryono ◽  
Eko Putra ◽  
Jazi Eko Istiyanto ◽  
Agus Harjoko
Keyword(s):  
Operating System ◽  
Real Time ◽  
Error Detection ◽  
Data Handling ◽  
System Error ◽  
Real Time Operating System ◽  
The Core ◽  
Core Function ◽  
Error Detection And Correction ◽  
Correction System

The satellite requires the support of a robust sub system. On Board Data Handling (OBDH) is the core function of the satellite subsystem and has to be error free in managing the operation of the satellite. It should withstand the harsh environmental conditions in space that has a lot of hazards caused by radiations. In view of these two conditions, the OBDH design should be able to manage the operation and overcome the hazards of radiation. In order to manage the operation Real Time Operating System (RTOS) was applied. RTOS was able to manage the task efficiently and effectively. In the aerospace domain, RTOS has become popular because of its strength in managing the operating system. Error Detection and Correction System (EDAC) system was applied to make OBDH more robust. This paper discusses the implementation of the EDAC system in tandem with the RTOS behaviour to manage the operation and increase the robustness of the system. The findings show that OBDH can be programmed successfully using RTOS to handle critical and robust operations. 

scholarly journals PERFORMANCE COMPARISON OF USART COMMUNICATION BETWEEN REAL TIME OPERATING SYSTEM (RTOS) AND NATIVE INTERRUPT

2016 ◽  
Vol 9 (1) ◽  
pp. 43
Author(s):  
Novian Habibie ◽  
Machmud Roby Alhamidi ◽  
Dwi Marhaendro Jati Purnomo ◽  
Muhammad Febrian Rachmadi
Keyword(s):  
Operating System ◽  
Embedded Systems ◽  
Embedded System ◽  
Real Time ◽  
Performance Comparison ◽  
The Other ◽  
Crucial Point ◽  
Real Time Operating System ◽  
Interrupt Service Routine ◽  
External Component

Comunication between microcontrollers is one of the crucial point in embedded sytems. On the other hand, embedded system must be able to run many parallel task simultaneously. To handle this, we need a reliabe system that can do a multitasking without decreasing every task’s performance. The most widely used methods for multitasking in embedded systems are using Interrupt Service Routine (ISR) or using Real Time Operating System (RTOS). This research compared perfomance of USART communication on system with RTOS to a system that use interrupt. Experiments run on two identical development board XMega A3BU-Xplained which used intenal sensor (light and temperature) and used servo as external component. Perfomance comparison done by counting ping time (elapsing time to transmit data and get a reply as a mark that data has been received) and compare it. This experiments divided into two scenarios: (1) system loaded with many tasks, (2) system loaded with few tasks. Result of the experiments show that communication will be faster if system only loaded with few tasks. System with RTOS has won from interrupt in case (1), but lose to interrupt in case (2).

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