Back to results
US 6,470,751 B1Granted
Vibration detecting apparatus and method thereof
AssigneeLG Electronics Inc.
InventorSeung Taek Baek
Life of this patent
Estimating the term…
Abstract
A vibration detecting apparatus includes a bobbin having a moving path of desired length in an inner periphery of the bobbin; a core movable along the moving path in the inner periphery of the bobbin by vibration applied from exterior or vibration applied to the bobbin; and a coil wound on an outer periphery of the bobbin, the inductance of which being changed in accordance with the shift of the core.
Claims31
A vibration detecting apparatus, comprising:
- a bobbin having a moving path of a desired length in an inner periphery of the bobbin;
- a core movable along the moving path in the inner periphery of the bobbin by vibration applied from exterior motion or vibration applied to the bobbin;
- and
- a coil wound on an outer periphery of the bobbin, inductance of the coil being changed according to shift of the core, wherein the coil is wound on the outer periphery of the bobbin in such a way that the number of turns in the coil varies linearly from one end to the other end of the bobbin.
1 more element
A vibration detecting apparatus comprising:
- a bobbin having a moving path of desired length formed in an inner periphery of the bobbin;
- a core movable reciprocally along the moving path in the inner periphery of the bobbin by vibration applied from exterior or vibration applied to the bobbin;
- a coil wound on an outer periphery of the bobbin, in such a way that the number of turns in the coil per fraction of the desired length of the bobbin varies so that a change in inductance varies in proportion to a combination of both the position of the coil and the winding of the coil;
- a Colpitts oscillating circuit for outputting an oscillatory signal corresponding to the changed inductance;
- and
- resonance frequency detecting means for detecting the frequency of oscillatory signal outputted from the Colpitts oscillating circuit.
3 more elements
A vibration detecting apparatus comprising:
- a bobbin having a moving path of desired length formed in an inner periphery of the bobbin, the bobbin being declined at a desired angle with regard to the direction of gravitation;
- a core positioned one end of the bobbin and movable reciprocally along the moving path in the inner periphery of the bobbin vibration applied from exterior or vibration applied to the bobbin;
- a coil wound on the outer periphery of the bobbin, in such a way that the number of turns in the coil per fraction of the desired length of the bobbin varies so that a change in inductance varies in proportion to a combination of both the position of the coil and the winding of the coil;
- a Colpitts oscillating circuit for outputting an oscillatory signal corresponding to the changed inductance;
- and
- resonance frequency detecting means for detecting the frequency of oscillatory signal outputted from the Colpitts oscillating circuit.
3 more elements
A vibration detecting apparatus, comprising:
- a bobbin having a moving path of a desired length in an inner periphery of the bobbin;
- a core movable along the moving path in the inner periphery of the bobbin by vibration applied from exterior motion or vibration applied to the bobbin;
- and
- a coil wound on an outer periphery of the bobbin, in such a way that the number of turns in the coil per unit length of the bobbin varies so that a change in inductance varies in proportion to a combination of both the position of the coil and the winding of the coil.
1 more element
A vibration detecting apparatus, comprising:
- a bobbin having a moving path of a desired length in an inner periphery of the bobbin;
- a core movable along the moving path in the inner periphery of the bobbin by vibration applied from exterior motion or vibration applied to the bobbin;
- and
- a coil wound on an outer periphery of the bobbin, is such a way that the number of turns in the coil varies substantially linearly over at least one measured width of a prescribed distance.
1 more element
Dependencies are inferred from the claim text.