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US 8,786,343 B2Granted
Method, apparatus and system for sensing a signal with automatic adjustments for changing signal levels
AssigneeCognitive Vision Inc.
InventorsDerek H. Geer, Timothy John Smelter, John Gordon Thomas
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Abstract
The present specification provides a method, apparatus and system for sensing a signal with automatic adjustments for changing signal levels. A novel fractional peak discriminator circuit is provided which can be incorporated into a system for measuring periodic signals from moving elements. The circuit can be used regardless of whether the periodic signals are detected using optics, magnetic detector or other methods.
Claims10
A signal conditioner circuit comprising:
- a filter for receiving an electrical signal generated by a sensor;
- said sensor configured to detect rotational periodic movement and generate said electrical signal based on said rotational periodic movement;
- said filter for generating a filtered signal having a peak where said electrical signal is greatest, wherein said peak represents a single rotation;
- a peak detector configured to receive said filtered signal and to detect said peak and generate a detected-peak signal that holds said peak;
- a peak-divider configured to receive said detected-peak signal and to divide said detected-peak signal by a predetermined amount and thereby generate a divided-peak signal;
- a comparator configured to receive said divided-peak signal and said filtered signal;
- said comparator configured to generate and output a pulse when a comparison between said divided-peak signal and said filtered signal results in a determination that said filtered signal exceeds said divided-peak signal.
4 more elements
A signal conditioner circuit comprising:
- a filter for receiving an electrical signal generated by a sensor;
- said sensor configured to detect rotational periodic movement and generate said electrical signal based on said rotational periodic movement;
- said filter for generating a filtered signal having a peak where said electrical signal is greatest, wherein a plurality of said peaks represents a single rotation;
- a peak detector configured to receive said filtered signal and to detect said peak and generate a detected-peak signal that holds said peak;
- a peak-divider configured to receive said detected-peak signal and to divide said detected-peak signal by a predetermined amount and thereby generate a divided-peak signal;
- a comparator configured to receive said divided-peak signal and said filtered signal;
- said comparator configured to generate and output a pulse when a comparison between said divided-peak signal and said filtered signal results in a determination that said filtered signal exceeds said divided-peak signal.
4 more elements
Dependencies are inferred from the claim text.