IFD:Sensors: Difference between revisions

IFD:Sensors (view source)

Revision as of 22:07, 29 January 2012

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-== Sensors for Interaction ==
+Sensors can be categorized by many aspects. Intuitively the most unique property of a sensor is what's it obviously detecting. For example everybody would know that a temperature sensor is measuring the physical temperature. And also what an air pressure sensor is made for. In these examples the physical method and our common understanding of the sensor is identical.
-List of Sensors suitable for Interaction, categorized by different aspects:
+However there are also sensors which aren't that obvious. What is a touch screen measuring? Touchscreens are detecting touch, but they are measuring pressure or presence - or even resistance or capacitance. So the touch screen is more an applicance of an other type of sensor.
+Many technical related people will regard the physical method of measurement as most clearly identifying. However this isn't true as well as there are many sensors which are already a fusion of many sensors. (for example an inertial motion unit has a compass, gyroscopes, temperature sensor and and accelerometer). Thus it can be very hard to find a specific sensor.
-=== Interface: ===
+To design electronic devices using a sensor the electric interface of the sensor plays a main role in using- and sometimes also when selecting a sensor. Some are very simple to interface and need almost no effort, while others are very precise and need a special interface.
-Resistance, voltage, current, capacitance, frequency, digital protocol, pwm, switch, open collector,  logic level
-=== Physical effect: ===
+All three: application, physical method and electric interface are important - and there may be more properties to categorize sensors.
-Pressure, Tension, Voltage, Current, Magnetism, Bend / flex, position, length, distance, presence, orientation, light, conductance (resistance), sound pressure, air pressure, fluid pressure, ultrasound, angle, radii (curvature)
-=== Use as interface ===
+=== Interfaces ===
-Difficult to classify, thus incomplete:
+Sensors can be interfaced via:
+* Resistance
+* voltage
+* current
+* capacitance
+* frequency (pulses per time)
+* digital protocols (serial and parallel)
+* pwm (lenth of on/off period - duty cycle)
+* switch (connection is open and closed)
+* open collector (almost identical to a switch)
+* logic level (high / low)
+* other...
+=== Physical property measured ===
+Pressure
+Tension
+Voltage
+Current
+Magnetism
+Bend
+flex
+position
+length
+distance
+presence
+orientation
+light
+conductance (resistance)
+sound pressure
+air pressure
+fluid pressure
+ultrasound
+angle
+radii (curvature)
+=== Applications ===
+Uncountable - thus incomplete:
 location (2d, 3d), eye position, movement, forces and deformation, presence, ambient measurements. switches and buttons. incremental input (rotary or linear sliders, etc.)
-=== Common Examples ===
+==== Common Examples ====
-writing: location + pressure
-mouse: location + digital pressure + wheel
+* tablet writing: location + pressure
+* mouse: location + digital pressure + wheel
+* touch screen
+* inertial tracking
+* GPS tracking
+* Joystick
+* Piano Keyboard
+== List of Sensors ==
 {| class="wikitable sortable" {{Prettytable}}
@@ Line 181: / Line 223: @@
 |<!--Electr:--> digital
 |-<!--RowEnd-->
+|}
-|<!--Sensor:-->
+{|
-|<!--Physic:-->
-|<!--Electr:-->
-|-<!--RowEnd-->
 |<!--Sensor:-->
 |<!--Physic:-->
@@ Line 192: / Line 231: @@
 |-<!--RowEnd-->
 |}
 == Links ==