INTERACTION SENSOR

1. INTERACTION SENSOR
Name: Abdul Rafay Khalid
Roll No.: 44
Subject: Physics

2. HISTORY
• For type thermostat.
• The inventor is Warren Johns.
• This thermostat was able to keep temperatures within a degree of accuracy.
• The first thermostat came to market in 1883.

3. WHAT IS AN INTERACTION SENSOR?
• An Interaction Sensor is a semiconductor device that captures the minimal hand
movements of a millimeter scale. It includes a transmitter that emits radio waves as
a frequency-modulated signal.

4. TYPES
• Direct Sensor:
A sensor that can convert a non-electrical stimulus into an electrical signal with
intermediate stages. E.g.: thermocouple (temperature to voltage).

5. CONT.
• Indirect Sensor: A sensor that has multiple conversion steps to transform the
measured signal into an electrical signal. E.g.: fiber-optic displacement sensor (light
current to photons to current).

6. CHARACTERISTICS
• Sensitivity
• Resolution
• Linearity
• Drift
• Rise

7. WORKING PRINCIPLE
• In electronics, a sensor contains a physical element with electrical properties that
change in a known way to changes in the environment you are interested in.
• Put simply, a sensor converts stimuli such as heat, light, sound, and motion into
electrical signals.
• These signals are passed through an interface that converts them into a binary code
and passes this on to a computer to be processed.

8. DOPPLER EFFECT
• Doppler Effect refers to the change in wave frequency during the relative motion
between a wave source and its observer. It was discovered by Christian Johann
Doppler who described it as the process of increase or decrease of starlight that
depends on the relative movement of the star.

9. GOOGLE SOLI CHIP
• Soli is a miniature radar that understands human motions at various scales: from
your heartbeat to the movements of your body.

10. CONT.
• Pocket-lint) - Google announced Project Soli in 2015 during a session at its I/O
Developer Conference.
• Since then, Google's ATAP (Advanced Technology and Projects) division has been
developing technology, which can be used in wearables, phones, computers, cars,
and IT devices.

11. HOW DOES GOOGLE'S SOLI CHIP WORK?
• The Google Soli chip uses radar, so it works by emitting electromagnetic waves with
objects within the beam reflecting information back to the antenna, according to
Google ATAP.
• Soli senses "subtle changes in the received signal over time. By processing these ...
Soli can distinguish complex finger movements and hand shapes within its field."

12. HOW WILL SOLI CHANGE THE WAY WE USE DEVICES?
• Soli has the potential to change the way we use all devices.
• Wearables are probably the most obvious and natural place to apply the technology
because those types of devices usually have such small displays.
• The Apple Watch, for instance, has the physical Digital Crown that provides users
with additional ways to navigate the WatchOS interface.

13. CONCLUSION:
• Google basically categorizes these as presence, reach and gestures.
• Motion Sense can detect when your hand is approaching the phone to wake it up,
for example.
• This is used to trigger the face unlock sensors, meaning you'll be able to unlock it
faster than systems that need you to pick up the phone to get it to work, for
example.

14. THANK YOU