How to test Potentiometric Rotary Angle Transducers ?

[FvM]

I think you should differentiate the two terms with your own personal experience & knowledge.

I did not use Wikipedia to differentiate the two terms. I quoted a definition of transducer, that is - in my opinion - basically correct, and also hold it against unsuitable definitions of the term transducer. I could also quote the Federal Standard definition of transducer:

A device for converting energy from one form to another for the purpose of measurement of a physical quantity or for information transfer.

If you think, that there are open problems related to the potentiometer sensor/transducer, please elaborate.

 

[kak111]

would you please differentiate between transducer & sensor

I took three different sources and added all together.......

A sensor is a generic term and refers to any device that can detect or measure a physical property.
Sensors measure energy levels and convert them into electrical signals that can be measured digitally.
Sensor is a device that, as its name signifies, measures a physical quantity and then converts it into signals that can be read by the user or by any other instrument

A transducer is more specific term and refers to a device that converts a non-electrical signal into a electrical signal.
Transducer, on the other hand is a physical device (Electrical, electro-mechanical, electromagnetic, photonic or photovoltaic) that converts either one type of energy into another or a physical attribute into another for the purposes of measurement or transfer of information.
Transducers are used to convert one energy type into another while sensors measure energy levels and convert them into electrical signals that can be measured digitally.


1. For example : A pressure sensor:
which uses a diaphragm to measure the pressure.
We would call this setup as a sensor , because we are using it to measure pressure.
In this sensor there is a transducer inbuilt in it, which is connected to the diaphragm.
That would be a strain gauge,here diaphragm can alone be called as a sensor
or the diaphragm and strainguage set up can also be called as a sensor because both of them are doing the same job,
give you the value of pressure.
Like diaphragm giving its output as displacement and
diaphragm and strain gauge together giving an output as change in resistance proportional to the pressure.

And strain gauge is device which converts physical strain into electrical resistance,
so this strainguage is acting like a transducer.

2. For example : A water meter converting mechanical turning of the turbine by water flow and converting it to pluses with led and optotransistor.
The input would be mechanical and the output would be digital.
So this is flow sensor for water.

And led / optotransistor is transducer part of this sensor.

So can we say that........... all transducers are sensors but all sensors are not transducers.

 

[FvM]

I recognize a honorable attempt to narrow down the term transducer. The idea to restrict it to the actual interface between different physical quantities doesn't sound bad. I'm not sure however, if it works for all kinds of real world transducers. Of course your differentiation is bringing up new questions. Referring to the turbine flow meter example, you mentioned, that the photo transistor inside is a transducer. But the turbine - or the shutter attached to it - can be also considered a transducer because converts mechanical movement to light intensity. I won't overrate the "digital" (pulse counting) aspect in this regard, you can think of different designs as well.

The problem is basically caused by the intention to draw the line between transducer and non-transducer devices, despite almost similar function. The alternative would be to give up a differentiation that possibly leads to nothing.

Finally a minor contradiction to all "transducers are sensors". You forgot the case of transducers that are working as pure actors, e.g. a loud speaker.

 

[munzir]

I took three different sources and added all together.......

A sensor is a generic term and refers to any device that can detect or measure a physical property.
Sensors measure energy levels and convert them into electrical signals that can be measured digitally.
Sensor is a device that, as its name signifies, measures a physical quantity and then converts it into signals that can be read by the user or by any other instrument

A transducer is more specific term and refers to a device that converts a non-electrical signal into a electrical signal.
Transducer, on the other hand is a physical device (Electrical, electro-mechanical, electromagnetic, photonic or photovoltaic) that converts either one type of energy into another or a physical attribute into another for the purposes of measurement or transfer of information.
Transducers are used to convert one energy type into another while sensors measure energy levels and convert them into electrical signals that can be measured digitally.


1. For example : A pressure sensor:
which uses a diaphragm to measure the pressure.
We would call this setup as a sensor , because we are using it to measure pressure.
In this sensor there is a transducer inbuilt in it, which is connected to the diaphragm.
That would be a strain gauge,here diaphragm can alone be called as a sensor
or the diaphragm and strainguage set up can also be called as a sensor because both of them are doing the same job,
give you the value of pressure.
Like diaphragm giving its output as displacement and
diaphragm and strain gauge together giving an output as change in resistance proportional to the pressure.

And strain gauge is device which converts physical strain into electrical resistance,
so this strainguage is acting like a transducer.

2. For example : A water meter converting mechanical turning of the turbine by water flow and converting it to pluses with led and optotransistor.
The input would be mechanical and the output would be digital.
So this is flow sensor for water.

And led / optotransistor is transducer part of this sensor.

So can we say that........... all transducers are sensors but all sensors are not transducers.

How to test " Pressure Transducer OR Pressure Sensor " (piezoelectric) ?

https://www.pcb.com/contentstore/docs/PCB_Corporate/Pressure/products/specsheets/112A21_M.pdf

Model 112A21 Spec Sheet

or you may take any example of it ........

thanks

 

[dineshdeshmuk]

which is better to use for a given situation : piezoelectric, piezoresistive, inductive or capacitive pressure transducers ?

what are their advantages & disadvantages of each other over another ?

thanxXx

 

[kak111]

The problem is basically caused by the intention to draw the line between transducer and non-transducer devices, despite almost similar function.
The alternative would be to give up a differentiation that possibly leads to nothing.

FvM wrote exactly how it is.

If a transducer is a device that converts one type of energy to another so...
-batteries, motors, heaters, lamps, campfires, etc.... are transducers.

The word sensor is so broad concept that when I see a blind man with a white stick,
i can say that in his hand this man has sensor with inbuild nervo-electric 3-D transducers.

---------- Post added at 23:37 ---------- Previous post was at 23:36 ----------

How to test " Pressure Transducer OR Pressure Sensor " (piezoelectric) ?

Very good catalog and handbook
You find answers here................
**broken link removed**

 

[munzir]

FvM wrote exactly how it is.

If a transducer is a device that converts one type of energy to another so...
-batteries, motors, heaters, lamps, campfires, etc.... are transducers.

The word sensor is so broad concept that when I see a blind man with a white stick,
i can say that in his hand this man has sensor with inbuild nervo-electric 3-D transducers.

---------- Post added at 23:37 ---------- Previous post was at 23:36 ----------



Very good catalog and handbook
You find answers here................
**broken link removed**

I didn't see any testing circuit in that catalog & handbook (that you mentioned about)

**broken link removed**

thanks

 

[phatcreators]

Kak111,
you didn't replay ..... plz reply

thanks

 

[kak111]

Everything is there................

Test and calibrating
Look pages 51...55

Needed devices ...
signal conditioner
p. 70...73

Oscilloscope , memory scope.

Measuring circuit p. 74

Tech. info & circuits p. 76...80