27
b - Effect of load on the static characteristic of a potentiometric sensor.
2.2 Dynamic characteristics of the sensor that measures fuel consumption in
moving vehicles.
Transmission function
To derive the transfer function, it is more convenient to take the load current as
the output value; it can be determined using the equivalent generator theorem. In
= Uout0 / (Rin + Zn)
Consider two cases:
1. The load is purely active Z = R since Uout 0 = K1x In = K1x / (Rin + Rn)
where K1 is the gear coefficient of the sensor idling.
Using the Laplace transform, we obtain the transfer function W (p) = In
(p) / X (p) = K1 / (Rin + Rn) = K
Thus, we got an inertia-free link, which means the sensor has all the
frequency and time characteristics corresponding to this link.
Do'stlaringiz bilan baham: