Defecto: El transporte tiene dificultades para cambiar de marcha o experimenta cambios bruscos de velocidad.
Bearingless speed sensors may be found in almost every wheelset of a rail vehicle. They are principally used for wheel slide protection and usually supplied by the manufacturer of the wheel slide protection system. These sensors require a sufficiently small air gap and need to be particularly reliable.
There are also increasingly motors in which sensors have to scan aluminium target wheels, for instance because the impellers are made of an aluminium alloy and the manufacturer does not wish to have to shrink on a separate ferromagnetic gear rim.
La señal se genera cuando las ruedas motrices del automóvil giran. Esto se puede obtener de las siguientes maneras:
Additionally, they are less effective at low speeds, as the vibrational energy generated may not be strong enough to produce a meaningful signal.
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Por lo tanto, aún queda camino por recorrer ayer de que estos sensores ópticos se utilicen en los sensores de velocidad contemporáneos y en los sistemas antibloqueo de frenos de los vehículos comerciales actuales.
The functional principles of the two encoders are similar: a multichannel magneto-resistive sensor scans a target wheel with 256 teeth, generating sine and cosine signals. Arctangent interpolation is used to generate cuadrilongo pulses from the sine/cosine signal periods.
La importancia de este dispositivo no puede ser subestimada. El Sensor VSS ayuda a controlar funciones como el cambio de marchas en una transmisión automática, el control de crucero y la función antibloqueo de frenos.
Sensor de reluctancia magnética: Utiliza una rueda dentada en la transmisión o el tren trasero del vehículo y un sensor de reluctancia vss sensor que genera una señal eléctrica a medida que los dientes de la rueda dentada pasan por el sensor.
In more advanced systems, the teeth can be asymmetrically shaped to allow the sensor to distinguish between forward and reverse rotation of the wheel.
Some sensors now offer an integrated signal processor that attempts to correct the offset and amplitude of the Hall sensor signals. This correction enables a larger maximum permissible air gap at the speed sensor. On a module m = 1 target wheel these new sensors Gozque tolerate an air gap of 1.4 mm, which is wider than that for conventional speed sensors on module m = 2 target wheels. On a module m = 2 target wheel the new speed sensors Gozque tolerate gap of as much Vencedor 2.
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