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| en:examples:sensor [2010/02/08 20:27] – priitj | en:examples:sensor [2020/07/20 09:00] (current) – external edit 127.0.0.1 |
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| {{ :examples:sensor:sensors.jpg?580 |Sensors}} | {{ :examples:sensor:sensors.jpg?580 |Sensors}} |
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| Sensors are devices witch converts some physical quantity (temperature, luminance, force, acceleration, etc,) to something that can be read by a human or machine. With the help from sensors the micro controller receives information from the environment and makes decisions basing on this info. There are many types of sensors, in Wikipedia is counted approximately 195 types. But only sensors witch have electrical output signal can be connected to micro controllers. Basing on electrical output signal, it is possible to segment sensors as digital and analogue sensors. | Sensors are devices converting any kind of physical attributes (temperature, luminance, force, acceleration etc.) to a understandable form for humans or machines. With the help from sensors the microcontroller receives information from the surrounding environment and makes decisions based on it. There are many types of sensors, approximately 195 different types are listed in Wikipedia. Only sensors with electrical output signal can be connected to microcontrollers. Based on electrical output signal, is possible to segment sensors as digital and analogue sensors. |
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| In analogue sensor alters change of physical quantity some of its electrical values, usually voltage or resistance. Since micro controllers are digital devices, we have to change the signal of analogue sensor to digital before we deliver it to controller. For that mainly the analogue-digital converters are used witch are built-in in the micro controllers. | In analogue sensor any change in physical attributes changes one of its electrical values, usually voltage, current or resistance. Since microcontrollers are digital devices, the signal have to be converted from analogue to digital before delivering it to controller. For this purpose analogue-digital converters are used which usually are built-in to the microcontroller. |
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| If the analogue sensor includes already digitizer of information, it is called digital sensor. Digital sensors can also nominate information and do much more besides digitalizing. There may be several ways to transmit info from digital sensor to micro controller: easiest way – logic signals, more complex way – through some data link interface. Tough exercises are introducing simpler sensors witch are common in robotics. | Analogue sensor which already includes digitizer of information, it is called digital sensor. Digital sensors can also standardize information, calibrate sensors and perform a great deal of other functions. There are many ways for transmitting info from digital sensor to microcontroller: the easiest is with logical signals, more complex way – through some data link interface. The following exercises though, are introducing simpler sensors and sensors known in robotics. |
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