Instrumentation / Data Adq Flashcards
Intrinsic Machine Code
binary numbers 1111 0001
machine language
1A
Assembly language
AR
High level lenguage
+
Device used to convert one phenomen on (eg force) into another phenomenon (eg an electrical signal).
Transducer
ph Combined electrode potential formula equivalencia
Eel= E^0- S(pHa-pHi)
El = E^0 +10S(log([H2+]/[H1+]))
In pH sensors eqtn el slope S es negativo porque el potencial generado disminuye a medida que pH aumenta (T/F)
True
In Resistance Temperature Detectors R0 is usually ____ for standards RTDs
100 Ohms
Gage factor
Ratio of the fractional change in resistance to the fractional change in lenght ( strain) along the detecting axis of the gage.
if resistance decrease the lenght of the straing also decrease
Desired criteria for reproducible sampling
- Sampling Frequency >= 2xhighest signal frequency
- Sampling Frequency >= Nyquist rate
- Nyquist frequency >= 0.5 x Nyquist rate
Routh Criteria para determinar que un sistema es estable
- Todos los terminos tienen que tener el mismo signo (no terminos imaginarios)
- Todas las potencias entre el valor mas alto y mas bajo tienen que tener nonzero coefficients. A menos que todas las even o todas las odds esten missing.
Block Diagram Algebra
In programming, a recursive function is a function that
call itself
What is a compiler?
It is a software that is used to translate high-level language into machine code
In the selection of a RTD what is important: precision or accuracy?
Precision is important, and the acurrancy is not important
El output sensitivity de un strain gauge bridge circuit is V0/ε (T/F)
true
Gage Factor = deltaR/R / delta L/L = deltaR/R /ε
V0=delta R/4R * Vsource
Sustituyendo resulta que V0/ε = GF*Vsourse/4
__ is the process of multypliying a signal by sinusoids to shift the signal to a desired frequency band
Modulation
Cuando se utiliza time domain - se usa la invertida de laplace (T/F)
True
Steady state de un ssitema en controles se obtiene calculando el limite cuando s tiende a cero (T/F)
True
Para que un system transfer function sea estable elo pole del closed-loop tiene que estar en el left hand side del plano (por lo tanto ser negativo)
True
La sensitividad de un sistema se calcula en base a
G(s) * H(s)
