temperature sensor

[reye]

Hello, everyone, I'm struggling with the sensor studio.
I have some doubts about the findings: If, for example, I evaluate the temperature of a room within 1h, does the sensor measure these variations with time intervals? In this case, while being the analog sensor, am I not sampling a signal and therefore not returning to the digital field?

 

[meccanicamg]

Hello, everyone, I'm struggling with the sensor studio.
I have some doubts about the findings: If, for example, I evaluate the temperature of a room within 1h, does the sensor measure these variations with time intervals? In this case, while being the analog sensor, am I not sampling a signal and therefore not returning to the digital field?

digital or analog.... what confusion.
do you mix temperature with a probe that is connected to a transducer that throws out the signal in digital or analog?
the chronometer is integrated into the equipment and does temperature sampling at each established interval.
eventually you get a result that is a temperature/time sampling. What does he have? What does it have? It's just a table.

 

[Fulvio Romano]

Some confusion?

a sensor (more correctly transducer) has an output. if this output is for example 4-20 but or 0-24vdc the sensor is analogue. If you have an 8bit or serial output, you have a digital sensor.

in any case the sensor samples the temperature at intervals of time, so it is a measure at a discreet time, since the continuous time is only a mathematical abstraction that does not find feedback in reality.

I think your confusion is related to this aspect. an analog sensor returns a sampled measurement over time but continues in the measurement space (temperature axis). a digital sensor instead is discreet both in time and to measure and the resolution is measured in hz in time and in bit to measure.

Clear?

Ah... Why does the current measure start from 4 but from zero?

 

[MBT]

in any case the sensor samples the temperature at intervals of time, so it is a measure at a discreet time, since the continuous time is only a mathematical abstraction that does not find feedback in reality.

What if it's a mercury thermometer? He'd be picking up all the time, so there's no mathematical abstraction.
Am I wrong?

Ah... Why does the current measure start from 4 but from zero?

If it was zero.... it could be a cut cable
I have no idea.

 

[Cristallo]

excuse the intrusion in a field not mine.. is for culture.
but an analog sensor (for example a thermocouple) communicates the temperature at intervals? (distant time seems to me to have understood his name)
I mean, if the thermocouple measures every sec, I can't have a reading in sec. 13.5?
or the "discussed time" is due to the reading equipment that (in fact) decreases the measurements to make them in graphic/table format?

the 4 but is it due to a threshold value of the transducer? current type of gate of a transistor? But if it were, it would be the same with the volts, right?

 

[Fulvio Romano]

a mercury thermometer look at it with your eyes?
So it's at least 20hz, right? (average retina update frequency)

Thermocouple works continuously, it is true. what samples is the measuring circuitry.
with "it is only a mathematical abstraction" I wanted to understand that in reality instrumentation in continuous time does not exist because the signal in practice always comes championship.

But I should have said "no exists" and not "can not exist", which is a wrong statement.

 

[MBT]

a mercury thermometer look at it with your eyes?
So it's at least 20hz, right? (average retina update frequency)

Okay.
Objection accepted!

and the 4-20 speech??

 

[Er Presidente]

Hello, everyone, I'm struggling with the sensor studio.
I have some doubts about the findings: If, for example, I evaluate the temperature of a room within 1h, does the sensor measure these variations with time intervals? In this case, while being the analog sensor, am I not sampling a signal and therefore not returning to the digital field?

If you use a measuring and storing system with mechanical graphic recorder you will probably have a "continuous" and completely analogue reading. in other cases even if you use an analog sensor (however with the emission of a continuous signal) you will probably always have a sampler that will interrupt the signal with a particular frequency, so not completely "continue". Sure that if you use a tool with a sample rate of 2.5 khz, perhaps, it will not matter for a verification of the temperature change of a room within an hour. maybe you mean the difference between digital (i/o) signals (two on-off states) and "analog" (with "continuous" variation) a mere simplification to distinguish the i/o (input/output) of programmable systems.

 

[Cristallo]

But I should have said "no exists" and not "can not exist", which is a wrong statement.

My mom... But why do you "clean" yourself?
cmq, fleas for fleas (and always keeping in mind that I understand very little), the system of registration of temperatures of the pharmaceutical refrigerators, the roller or tachymeter, are not completely analogous (and therefore in continuous time) or also have discretization systems?