By-
Dr. NeeRaj Meel
What sensor and types of Sensors are mostly used in a Smartphone for extra
and needful smartness?This video will literate about sensors.
For view this video click on below
Gravity, accelerometer, gyroscope,
magnetometer, proximity, Barometer sensor
Gravity sensor accelerometer - An accelerometer is a sensor for
testing the acceleration along a given axis. When a physical body accelerates
at a certain direction, it becomes subject to a force equal to: F=ma
in accordance with Newton's Second Law. In this formula, m is
the mass, a is the acceleration. Therefore, accelerometers are built on the
principle of measuring the force exerted on a test body of a known mass along a
given axis.
Gyro sensors- The gyroscope sensor measures rotational velocity along the
Roll, Pitch and Yaw axes. It depends on the property of rotating mass as
illustrated in the following schematic drawing of the classical mechanical
gyroscope.Gyroscope is second most popular sensor in today's smartphone, after
the accelerometer sensor. Angular velocity is generally expressed in deg/s
(degrees per second).
The magnetometer sensor- magnetometer sensor in your smartphone also utilizes
the modern solid state technology to create a miniature Hall-effect sensor that
detects the Earth's magnetic field along three perpendicular axes X, Y and Z.
The Hall-effect sensor produces voltage which is proportional to the strength
and polarity of the magnetic field along the axis each sensor is directed. The
sensed voltage is converted to digital signal representing the magnetic field
intensity. Other technologies used for
magnetometer may include magneto resistive devices which change the measured
resistance based on changes in the magnetic field.
proximity sensor- A proximity sensor is a sensor able to detect
the presence of nearby objects without any physical contact. A proximity sensor
often emits an electromagnetic field or a beam of electromagnetic radiation
(infrared, for instance), and looks for changes in the field or return signal.
Barometer Sensor- a barometer as “a scientific instrument used in meteorology
to measure atmospheric pressure.” It measures the pressure exerted by the
atmosphere above it. This measurement of pressure can be used to forecast short
term changes in the weather and can be used to estimate altitude.
Any Error? Report to Us
Contents May Subject to copyright
Disclaimer: We cannot guarantee the information is 100% accurate.
No comments:
Post a Comment