Method for testing a sensor
AssigneeContinental Teves AG & Co. oHG
InventorSören Lehmann
Life of this patent
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Abstract
A method for testing a sensor with a primary inductor which is galvanically isolated from first and second secondary inductors which are respectively coupled inductively to the primary inductor, including: calculating a sensor output signal, wherein the sensor output signal is dependent on the coupling between the primary inductor and the first secondary inductor as well as that between the primary inductor and the second secondary inductor; determining a first electrical variable, which is different from the sensor output signal; comparing the first electrical variable with a first limiting value in order to determine whether the sensor is in a faulty state, as well as to a corresponding device and to a sensor having the device.
Claims15
A method for testing a sensor with a primary inductor which is galvanically isolated from first and second secondary inductors which are respectively coupled inductively to the primary inductor, comprising:
- calculating a sensor output signal from the secondary inductor, wherein the sensor output signal is dependent on a coupling between the primary inductor and the first secondary inductor as well as that between the primary inductor and the second secondary inductor;
- and
- determining whether the sensor is operating in a faulty state by:
- applying a constant current signal to the primary inductor and determining a first electrical variable, by measuring a voltage across the primary inductor;
- and
- comparing the first electrical variable with a first limiting value, the first limiting value being a threshold amplitude that is between a normal amplitude of the measured voltage when the sensor is operating in a normal state, and a fault amplitude of the measured voltage when the sensor is operating in the faulty state.
A method for testing a sensor with a primary inductor which is galvanically isolated from first and second secondary inductors which are respectively coupled inductively to the primary inductor, comprising:
- calculating a sensor output signal, wherein the sensor output signal is dependent on a coupling between the primary inductor and the first secondary inductor as well as that between the primary inductor and the second secondary inductor,
- determining a first electrical variable, of an additional signal of the sensor, which is different from the sensor output signal, and
- comparing the first electrical variable with a first limiting value in order to determine whether the sensor is in a faulty state,
- wherein the first limiting value of at least one of the limiting values is formed by a value which is constant over the measuring range of the sensor and which lies between the value of the first electric variable in the case of a faulty state and all or the values of the electrical variable which are delimited by the partial range in the case of a non-faulty state.
Dependencies are inferred from the claim text.