Method and device for evaluating a signal
AssigneeVitesco Technologies GmbH
InventorsKlaus-Dieter Schneider, Martin Meier, Felix Zeis
Life of this patent
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Abstract
The disclosure relates to a method and a device for evaluating a signal. The signal is provided from a signal source via a signal conditioning unit to a microcontroller for signal evaluation. The method includes detecting the signal from the signal source and transmitting the signal to the signal conditioning unit, which has an anti-aliasing filter. The method also includes filtering the signal by the anti-aliasing filter, which is set on the basis of the signal to be detected and providing the filtered signal to the microcontroller. The method also includes processing and evaluating the filtered signal in the microcontroller.
Claims10
A method for evaluating a pulse-width modulated (PWM) signal, the PWM signal is provided from a signal source via a signal conditioning unit to a microcontroller for signal evaluation, the method includes:
- detecting the PWM signal from the signal source and transmitting the PWM signal to the signal conditioning unit having an anti-aliasing filter;
- filtering the PWM signal by the anti-aliasing filter, which is set based on the PWM signal to be detected, and providing the filtered PWM signal to the microcontroller;
- and
- processing the filtered PWM signal in the microcontroller, the filtered PWM signal is processed by:
- digitizing the filtered PWM signal by an analog-to-digital converter, as a result of which discrete values are generated;
- comparing the discrete values that are generated with a predefined threshold value or range, wherein the comparison is carried out by a configurable digital comparator;
- transmitting the result of the comparison to a timer system;
- determining, by the timer system, a frequency and/or a load cycle of the PWM signal based on the results of the comparison received from the configurable digital comparator;
- storing the individual discrete values in a predefined memory area when the individual discrete values are in each case greater than the predefined threshold value or the predefined range or fulfill a comparison criterion, wherein the storage is initiated by the timer system based on the frequency and/or the load cycle of the PWM signal;
- and
- evaluating the discrete values of the PWM signal which are stored in the predefined memory area.
Dependencies are inferred from the claim text.