Abstract:
The present invention provides, an antenna test device to test antenna efficiency. The test device includes a cavity formed by at least one conductive sidewall. The cavity contains at least one tuning probe, at least one movable portion, or a combination thereof. The tuning probes and/or movable portion help inhibit the antenna under test from having faulty measurements due to anti resonance or coupling.
Abstract:
A plurality of signal-processing units corresponding to a plurality of operation modes are housed in a case (1), on the front (1a) of which are arranged a control panel (3), a display and a plurality of signal terminals (5a) located near the display and shared by the signal-processing units. A signal name memory stores the signal name (11) assigned to the signal at the signal terminal for each of the signal-processing units. A switch is operated to connect a signal terminal for a specified operation mode with a signal-processing unit for the specified operation mode. The signal name corresponding to the specified operation mode is read from the signal name memory and indicated near the associated signal terminal on the screen (4a) of the display.
Abstract:
In the central control device (9), the sensor output signal of an acceleration sensor (2) is split into a useful signal (11) and a disturbing signal (13) by filtering, whereby the disturbing signal (13) represents a magnitude for the disturbance state of the useful signal (11). In the satellite (1), low frequency disturbance components which indicate a higher level of disturbance of the sensor output signal can be amplified in a targeted manner before transmission to the control device (9) so that the control device (9) obtains an error message that can be easily detected.
Abstract:
The invention concerns a method for preparing an emulsified fuel, such as for example a water-in-diesel oil or a water-in-gasoline emulsion, to be used for powering spark ignition engines or in energy-producing appliances. The invention aims at enabling the production on an industrial scale of emulsions stable for at least four months, wherein the external phase is organic and the internal phase aqueous. Said aim is achieved by the inventive method which consists in mixing the organic phase, the aqueous phase and additives to homogenise into a volume V of liquid comprising the organic phase and the additives by circulating the latter at a homogenising capacity at a flow rate Qc such that the ratio Qc/V >/= 100 , in circulating the homogenised liquid in an external branch loop comprising an emulsifier system with a flow rate Qcirc such that the ratio V/Qcirc ranges between 0 and 2 h, and in supplying the branch loop with water upstream of the emulsifier system, until the desired characteristics of storage stability for the emulsion are obtained. The invention also concerns the device for implementing said method.
Abstract:
A current detector/indicator for DC has a transistor (1) and an LED (2). They are arranged so that current flow through the LED causes the transistor to conduct, shunting excess current away from the LED and through the transistor. For AC, the circuit can be doubled, with transistors and LEDs arranged with inverse polarity. A triac (15) may supplant the two transistors, with parallel, opposed LEDs (16) in its gate circuit.
Abstract:
The front-end circuit (1) for an impedance measurement comprises an excitation-terminal (12), intended to receive an excitation signal relative to a common ground (11), a first and a second input-terminal (13a,b), intended to be connected to two electrodes (3a,b), a first and a second output-terminal (14a,b), whereby each one of the two output-terminals (14a,b) is intended to provide a measurement signal during a use of the front-end circuit (1) in a measurement, preferably to an analogue to digital converter device (4); a first and a second mode selection-switch-unit (15a,b), each with two mode switch-inputs, an operational amplifier (16) and a reference resistor (17). During a measurement and depending on the state of the mode selection-switch-units (15a,b), a feedback-loop of the operational amplifier (16) comprises either a sample (130) arranged between the two input-terminals (13a,b) or the reference resistor (17).
Abstract:
La presente invención se refiere a un dispositivo de medición de voltaje y corriente en líneas de transmisión de energía, que comprende: un conductor eléctrico primario conectado en serie con la línea de tensión, donde por el conductor eléctrico circula una corriente eléctrica proveniente de la línea de tensión, el conductor eléctrico primario forma una pluralidad de espiras: dicho dispositivo además comprende una bobina con al menos dos terminales, que rodea el conductor eléctrico primario, donde la bobina está configurada para inducir un voltaje proporcional a la magnitud de la corriente eléctrica que circula por el conductor eléctrico, y un divisor de tensión conectado al conductor eléctrico y a tierra. Dicho divisor de tensión está configurado para suministrar un voltaje proporcional al voltaje del conductor eléctrico respecto a tierra. Adicionalmente, el dispositivo de medición de voltaje y corriente también incluye una impedancia conectada a al menos una de las al menos dos terminales de la bobina.