The entire electrode element therefore attains the partial potential value commensurate with the potential drop across the portion of the resistive layer spanned between the point at which the light beam is focussed and the common terminal with the measuring voltmeter. Thus, the position of the focussed light beam at any point on either of the half-rings will be determined by the ratio of the voltage at the top layer to the voltage across the bottom layer. In addition, both the top and the bottom of the cylinder are closed to prevent spurious wind effects inside the cylinder. Each layer performs a different function: the first (or bottom) layer is a resistive material formed by chemical or vacuum deposition on the insulating base as shown in FIG. The focussed light beam therefore emulates a frictionless sliding contact across the expanse of the optical potentiometer’s resistive layer.
- Cambios estructurales
- Neuralgia postherpética: Síndrome de dolor que aparece como complicación del herpes zóster
- Ayudar a determinar las causas del vómito en niños pequeños
- Irritación del conducto auditivo externo por el uso de aplicadores de algodón
- Infección de las vías urinarias,
- Infecciosas – por ejemplo, enfermedad de Lyme o gripe,
This tendency is measured by observing the tilt of the cylinder about a pneumatically damped universal pivot. The “tendency” of the cylinder to move will not only give the magnitude of the wind speed component, but also the direction in which it acts. In this way, the system is only subject to the vagaries of a single device when both measurements are taken.
There are, nevertheless, grave shortcomings in traditional systems as far as accuracies in the measurements of the magnitude and directional properties of the wind vector are concerned over a wide dynamic operational range. The above suggest that the required rotation is governed by the lower threshold of fluid velocity for which reliable measurements are desired.
15, diode D2 would conduct if the light beam were focussed on the upper half of the optical potentiometer; and D2 ‘ would conduct if the beam were focussed on the lower half. If the polarities of the source Vs were reversed, the diodes D1 and D1 ‘, respectively, would conduct from the upper and lower halves. Two diodes are effectively assigned to each half of the optical potentiometer, thus rendering the precise orientation of the polarity of the source Vs irrelevant.