Method and device for detecting solenoid actuation
First Claim
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1. A solenoid actuation detection device for detecting actuation of an armature of a solenoid comprising:
- a sensor for sensing an electric current flowing through a solenoid, said sensor creating a sensing signal based on the electric current;
a peak detector operatively connected to said sensor for receiving said sensing signal and for creating a peak signal from said sensing signal;
a comparator operatively connected to said sensor for receiving said sensing signal and said peak signal for comparing said sensing signal to said peak signal by subtracting said peak signal from said sensing signal to identify when said peak signal and said sensing signal intersect to determine when an armature of the solenoid was actuated; and
a reset circuit electrically connected to said sensor and said peak detector to reset said sensing signal and said peak signal.
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Abstract
A solenoid actuation detection device for detecting actuation of an armature of a solenoid includes a sensor for sensing electric current flowing through a solenoid, a peak detector for receiving the sensing signal and for creating a peak signal from the sensing signal, and a comparator for comparing the two signals to determine when an armature of the solenoid was actuated.
31 Citations
10 Claims
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1. A solenoid actuation detection device for detecting actuation of an armature of a solenoid comprising:
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a sensor for sensing an electric current flowing through a solenoid, said sensor creating a sensing signal based on the electric current; a peak detector operatively connected to said sensor for receiving said sensing signal and for creating a peak signal from said sensing signal; a comparator operatively connected to said sensor for receiving said sensing signal and said peak signal for comparing said sensing signal to said peak signal by subtracting said peak signal from said sensing signal to identify when said peak signal and said sensing signal intersect to determine when an armature of the solenoid was actuated; and a reset circuit electrically connected to said sensor and said peak detector to reset said sensing signal and said peak signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A solenoid actuation detection device for detecting actuation of an armature of a solenoid comprising:
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a sensing resistor electrically connected to a solenoid for sensing an electric current flowing through the solenoid, said sensing resistor creating a sensing signal based on the electric current; a peak detector operatively connected to said sensing resistor for receiving said sensing signal and for creating a peak signal from said sensing signal; an amplifier electrically connected between said sensing resistor and said peak detector for amplifying said sensing signal; a comparator operatively connected to said sensing resistor for receiving said sensing signal and said peak signal for comparing said sensing signal to said peak signal by subtracting said peak signal from said sensing signal to identify when said peak signal and said sensing signal intersect to determine when an armature of the solenoid was actuated; and a reset circuit electrically connected between said sensing resistor and said amplifier and to said peak detector to reset said sensing signal and said peak detector signal.
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Specification