Method and apparatus for emulation of a linear variable differential transducer by a capacitive gaging system
AssigneeADE Corporation
InventorRoy E. Mallory
Life of this patent
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Abstract
A capacitive gaging system comprising a capacitive displacement sensor and an interface circuit is used to replace a Linear Variable Differential Transducer (LVDT). An output of the capacitive displacement sensor is modified by the interface circuit which provides an output signal or signals representative of different types of LVDT outputs. The capacitive displacement sensor and the interface circuit can then be used to replace the LVDT in an LVDT measurement system. Accordingly, the capacitive displacement sensor and the interface circuit replace the LVDT without replacing the rest of the measurement system.
Claims23
A method of emulating an output signal of a linear variable differential transducer (LVDT) including the steps of:
- providing an output signal from a capacitive displacement sensor;
- modifying said output signal of said capacitive displacement sensor to provide an emulated LVDT signal;
- and
- providing said emulated LVDT signal to an LVDT conditioning circuit.
An apparatus for emulating an LVDT sensor output comprising:
- a capacitive displacement sensor;
- and
- an interface circuit, said interface circuit receiving an output signal from said capacitive displacement sensor, said interface circuit converting said output signal from said capacitive displacement sensor into an interface circuit output signal emulating an LVDT sensor output signal.
A measurement system comprising:
- a capacitive displacement sensor;
- an interface circuit, said interface circuit communicating with said capacitive displacement sensor and providing an interface circuit output signal emulating an LVDT sensor output signal;
- an LVDT conditioning circuit, said LVDT conditioning circuit in communication with said interface circuit output signal emulating an LVDT sensor output signal;
- and
- an LVDT back-end, said LVDT back-end in communication with said LVDT conditioning circuit.
Dependencies are inferred from the claim text.