IT uses in modern application through sensors

Visual sensors:

A visual sensor is the use of optical lens to gather or input data and turn it into visual output like an image or a video. Examples of visual sensors are digital cameras and barcodes

Acoustic:

Acoustic sensor is a form of sensor that captures vibration in the environment and turns them into audio. An example of acoustic data is microphones

Positioning:

Positioning sensor is the use of tracking system to identify a specific location in a specific area. Examples of positioning sensor include google map and car GPS

Weather:

Weather sensor is the use of temperature dependent tools to gather weather data to identify what type of weather is in a particular condition. An example of weather sensor is a barometer

First application: home security

Home security is the use of any forms of tools used to help with home surveillance and detect and report any unusual activity for alarming or emergency purposes.

A typical home security system includes:

A control panel, which is the primary controller of a home’s security system

Door and window sensors

Motion sensors, both interior and exterior

Wired or wireless security cameras

A high-decibel siren or alarm

A yard sign and window stickers

example: Smoke detector

When a fire breaks out smoke will enter the optical chamber of the alarm through the opening vents. Then the smoke particles cause the infrared light to be scattered onto the photodiode light receptor.

This tool detects smoke particles in the air which are a combination of carbon dioxide and carbon monoxide. According to the National Fire Protection Association (NFPA), having working smoke alarms in your home cuts your risk of dying in a fire by 55%

Smoke detector is a visual sensor because it uses light to function an optical smoke alarm (also called photo-electric smoke alarm) works using the light scatter principle. The alarm contains a pulsed infrared LED which pulses a beam of light into the sensor chamber every 10 seconds to check for smoke particles.

example: motion sensor

A motion sensor detects the movement of people and objects in a particular place. Motion sensor sends a beam of light with motion detecting infrared energy waves instead of light waves the infrared radiation is denser nearer to the device and it spreads out farther away allowing it to detect movement closer

Motion sensors are acoustic sensors since they work by sending and receiving vibration. Active ultrasonic sensors emit ultrasonic sound waves at a frequency above the range of human hearing. These waves bounce off objects in the immediate vicinity and return to the motion sensor. A transducer within the sensor acts as a waypoint for the signal—it sends the pulse and receives the echo

example: security camera

Security cameras collect visual data, this could be in the form of images or videos. Cameras first capture visual scenes in their lens and then use optical sensors to record those visual scenes. security camera is a form of visual sensor since it uses turns data that it has gathered into images and videos

example: control panel

A control panel collects data which are different types of signals from other sensors. Control typically features a touchpad for easy programming and interaction, is where pass codes are entered to arm and disarm the system, can work on voice commands, and can be programmed to work with wireless remote controls called key fobs. A control panel can be a form of both acoustic and visual since it collects vibration from the environment and can also collect visual data at the same time

second application: environmental monitoring

Environmental monitoring refers to the constant tracking of changes in the environment for purposes such as study or awareness. An example of this is the weather forecast. Environmental monitoring describes the processes and activities that need to take place to characterize and monitor the quality of the environment.

example: data buoy

A data buoy collects environmental data about temperature salinity and chlorophyll. Data buoys measure and transmit automatically, in a predictable and controlled way, communicating in real time via satellite telecommunication systems. Data buoys use weather sensors because they detect environmental data for the monitoring and forecasting of weather changes.

example: automated sampler

An auto sampler collects samples about a particular environmental source like the atmosphere or a river. An automated sampler works by using liquid chromatography. An automated sample injector introduces a precise aliquot of a sample solution from a sample container to the high-performance liquid chromatography column under high-pressure flow conditions. Automated sampler uses weather sensors since it relies on liquid chromatography which looks for changes in liquid states.

example: meter

a meter collects any data that is considered measurement or length. A meter works by separately measuring the different distances or lengths that is shown. An electronic meter is a positional sensor device since it will use energy to sense and accurately predict distance and length from one place to another.

example: data centre

An online data centre stores a variety of data that is considered critically important to an organization. An online data collect data by been connected to other device via online means. It can fall under all four categories since it collects the data that it collects can be visual, acoustic, positional or weather