Abstract:The increasing capabilities of smart phones have led to the replacement of PC's in almost all real-time scenarios. A Smartphone is a mobile/portable personal computer with a swift processor, advanced mobile operating system, huge memory space and a platform for many real-time applications-business, accounting, entertainment, scientific, recreation, education, finance, social networking, news and many other applications suited to the 21st century impatient world. In the early inception of mobile technology development, mobile phones were elite devices primarily used by middle and upper class people. But with more and more Smartphones manufacturers entering the market, the price of a Smartphone is so affordable [1] that today about half the adult population owns a Smartphone.[2] Android phones are increasingly becoming cheaper [3], better and more intelligent. Android is a mobile OS developed by Google, based on the Linux kernel. [4] In this paper, we develop an android application which can monitor the realtime values of any electronic/optical/acoustic sensor on android powered Smartphone. The mobile application is well suited to the scientific community, engineers and professionals/amateurs in their real-time monitoring of sensed value. The stream of real time data is sent wirelessly to the Smartphone via Bluetooth or Wi-Fi. In this paper, we also present to you the ADLC model which includes feasibility study, Requirement analysis, Design and implementation, integration and testing, operation and maintenance and marketing.

Abstract:The computerization of our society has substantially enhanced our capabilities for both generating and collecting data from diverse sources. A tremendous amount of data has flooded almost every aspect of our lives. There is a need in transforming the vast amount of data into useful information and knowledge. This has led to the generation of promising and flourishing frontier in computer science called data mining. Data mining is the automated or convenient extraction of patterns representing knowledge implicitly stored or captured in large databases, data warehouses, the web, other massive information repositories or data streams.

A System can be defined as an arrangement in which all units assemble and work together according to a program or plan. An embedded system is a system that has software embedded into computer-hardware, which makes a system dedicated for an application or specific part of an application or product or part of a larger system. Today Embedded systems are used in real-time computing applications like temperature sensing, environmental gas sensing, medical applications, automotive, military applications etc…Embedded systems may or may not have user interface. In systems dedicated only to one task, there is no user interface provided. In this paper we have developed an embedded system with an android interface. The android application developed by us is capable of wirelessly monitoring real-time sensor values. In the previous paper titled "Practical Implementation of Real-time Sensing of Sensor values using Android Applicaion-1" we had tested our Third party developed Android application with numerous sensors-LPG sensors, Alcohol sensing, Range detection using ultrasonic sensors and Temperature-Humidity sensing. In this paper we are applying the embedded system design to many other sensors like CO, CO 2 and SO 2 sensors; IR sensors and Pressure sensors.

A sensor is a device which detects or measures a physical property and records, indicates, or otherwise responds to it. The sensor used in a particular application is sensitive to one or more sources, and when the sensor is exposed to that stimulus/stimuli, this affects the physical, chemical or electromagnetic properties of the sensor which is further processed to a more usable and readable form. Sensor is the heart of a measurement system. It is the first element that comes in contact with environmental variables to sense and generate an output. A sensor can be classified into various categories like active and passive sensors, analog and digital sensors, mechanical sensors, bio sensors, etc. In this paper we are using an array of sensors, and reading data from the sensors simultaneously and displaying it using an android application called "sense_graph" which is a scientific third party application developed by our team. We are using an array of similar sensors-Force sensors, which are capable of measuring force applied per unit area. In this paper, we are interested in measuring force/area on the bottom of the human foot and framing conclusions. The measurements are made in N/m² at a particular time interval and a graph of N/m² v/s time (sec) is plotted. There are regions in the foot where pressure could be very high or negligible for a specific posture or movement of the human body.

Abstract:We can smell, taste, feel, hear and see the gifts of nature but we have always had that curiosity or a strong desire to measure those senses in a more systematic manner and record those values/store those values. Sound from a speaker is loud-This is the reading given by our ears which is one of the five sense organs, but we would like to measure it in terms of units like decibels dB, frequency Hz etc… This is necessary for systematic analysis. For this we need a sensor that is sensitive to the real time processes and their outcome, a processing unit, connectivity elements and output display/elucidation unit. In this paper we carry out real time measurements of %vol of vapour of a volatile liquid (Alcohol), Leakage of hazardous gasses like LPG, Climate-Humidity and temperature and the distance between the source and the obstacle using ultrasonic sensors. All these real time sensor data is monitored wirelessly using a third party developed Android application and installed into an Android OS powered Smartphone and stored into the internal or SD card memory (external memory) of the Smartphone. We have designed an android application named "Sense_graph" which can wirelessly record and monitor real time values. In this paper we also mention the key considerations in sensor selection and operation, they are Accuracy and Resolution, Precision, Sensitivity, Reliability, Response time, Practicality and Cost.