Device and method for detecting an end of a movement of a valve piston in a valve
First Claim
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1. A device for detecting an end of a movement of a valve piston in at least one valve, comprising:
- the device being connected to the least one valve and embodied for;
detecting a first variable being representative of an induced voltage induced by the movement of the valve piston in a coil of the valve;
determining a second variable being representative of a first derivation of the first variable according to time; and
detecting the end of the movement of the valve piston in the valve if the first variable is greater than a predetermined first threshold value and the second variable falls below a predetermined second threshold value.
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Abstract
A device is embodied for detecting a first variable that is representative of an induced voltage induced by a movement of a valve piston in the coil of a valve. The device is further embodied for determining a second variable representative of a first derivation of a first variable according to time. Furthermore the device is embodied for detecting the end of the movement of the valve piston in the valve if the first variable is greater than a predetermined first threshold value and the second variable drops be low a predetermined second threshold value.
20 Citations
19 Claims
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1. A device for detecting an end of a movement of a valve piston in at least one valve, comprising:
the device being connected to the least one valve and embodied for; detecting a first variable being representative of an induced voltage induced by the movement of the valve piston in a coil of the valve; determining a second variable being representative of a first derivation of the first variable according to time; and detecting the end of the movement of the valve piston in the valve if the first variable is greater than a predetermined first threshold value and the second variable falls below a predetermined second threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for detecting an end of a movement of a valve piston in a valve, which comprises the steps:
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detecting a first variable being representative of an induced voltage induced by the movement of the valve piston in a coil of the valve; determining a second variable being representative of a first derivation of the first variable according to time; and detecting the end of the movement of the valve piston in the valve if the first variable is greater than a predetermined first threshold value and the second variable drops below a predetermined second threshold value. - View Dependent Claims (10, 11)
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12. A device for detecting an end of a movement of a valve piston in at least one valve, the device being connected to the least one valve, the device comprising:
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means for detecting a first variable being representative of an induced voltage induced by the movement of the valve piston in a coil of the valve; means for determining a second variable being representative of a first derivation of the first variable according to time; and means for detecting the end of the movement of the valve piston in the valve if the first variable is greater than a predetermined first threshold value and the second variable falls below a predetermined second threshold value.
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13. A device for detecting an end of a movement of a valve piston in at least one valve, the device being connected to the least one valve, the device comprising:
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a device input for receiving an induced voltage induced by the movement of the valve piston in a coil of the valve; a first device coupled to said device input and detecting a first variable being representative of the induced voltage; a second device coupled to said device input and determining a second variable being representative of a first derivation of the first variable according to time; and a third device for detecting the end of the movement of the valve piston in the valve if the first variable is greater than a predetermined first threshold value and the second variable falls below a predetermined second threshold value, said third device connected to said output of both said first and second devices. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification