From: Don Pearce
Subject: Re: Difference between AC adapter and charger?
Date: Thu, 24 Oct 2002 11:31:31 +0430
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On Thu, 24 Oct 2002 06:58:43 GMT, DarkMatter
>On Thu, 24 Oct 2002 11:14:11 +0430, Don Pearce
> Gave us:
>>On Thu, 24 Oct 2002 06:37:51 GMT, DarkMatter
>>>On Thu, 24 Oct 2002 05:40:05 GMT, "Ratch" Gave us:
>>>>"Don Pearce" wrote in message
>>>>> On Thu, 24 Oct 2002 04:36:09 GMT, "Ratch" wrote:
>>>>> > Quite so, but converter is more descriptive of an electric
>>>>> >which converts one type of energy (mechanical) into another kind
>>>>> >(electrical). The electrical energy supply changes the form, controls
>>>>> >flow , but does not change the energy type.
>>>>> That would be a transducer.
>>>> Good one! Although I have never heard of a turbine/generator at a
>>>>hydroelectric plant called that. Ratch
>>> A transducer is the moniker usually given any device that is
>>>typically used to monitor the physical activity in a given system.
>>> An IR resistor bolometer resolves heat to electrical output.
>>> A condenser microphone resolves air motion into electrical activity
>>> A strain gauge integrated circuit device, which is a small system
>>>unto itself, but operates as a transducer. It resolves pressure into
>>>an electrical signal.
>>> An LVDT position sensor resolves physical position into an impedance
>>> An IR Light sensitive receiver packaged just like the IR transmitter
>>>LED. They resolve digitally pulsed IR light into binary electrical
>>> A CCD array is an entire array of tiny transducers that get called
>>>"pixel elements" by us. They resolve optically corrected and focused
>>>color information into 2-D imagery.
>>In common usage, yes. I found a dictionary definition of transduction
>>" the process whereby a transducer accepts energy in one form and
>>gives back related energy in a different form"
>>That seems to about cover it.
> Yes, but when said transducers are used to perform work, as in the
>conversion of one form of "power" to another, they are typically
>called converters, generators, tractors, PTOs. All of these things
>are rarely referred to as a type of transducer though technically they
>fit the definition, and are transducers. It's just that the term is
>usually used in metrology, and control systems and subsystems.
> It's all just how things evolve in and through the industries.
> DC to DC converters happen to convert one voltage of the same type
>of energy to another voltage of the same type of energy. An AC
>generator driven by a small internal combustion engine is called a
>generator. Same thing for a huge turbine driven model.
Sure; as I said, this is all to do with common usage - not definition.