Object detecting device for detecting object using electromagnetic induction
First Claim
1. An object detecting device that uses an electromagnetic induction to detect the shape of or the distance from an object to be measured made of an electrically conductive or magnetic material placed on a detection surface of the device, said device comprising:
- a first loop wire group in which a plurality of first loop wires each having a plurality of coil-shaped portions are arranged on the same plane in parallel to one another;
a second loop wire group in which a plurality of second loop wires each having a plurality of coil-shaped portions are arranged on the same plane in parallel to one another, the second loop wire group being arranged in parallel to the first loop wire group, and the plurality of the second loop wires being arranged in perpendicular to the plurality of the first loop wires, respectively;
a spacer that keeps the distance between the first loop wire group and the second loop wire group constant;
a plurality of electromagnetic coupling portions at which the first loop wires and the second loop wires are electromagnetically coupled to each other through the coil-shaped portions located at the intersections between the first loop wires and the second loop wires;
a driver that is connected to one of the first loop wire group and the second loop wire group and drives the loop wire group connected thereto; and
a detector that is connected to the other one of the first loop wire group and the second loop wire group and detects a change in the degree of electromagnetic coupling at each of the electromagnetic coupling portions from the loop wire group connected thereto.
4 Assignments
0 Petitions
Accused Products
Abstract
Provided is an object detecting device, which can detect the shape of or the distance from an object made of an electrically conductive or magnetic material, and which can detect the position indicated by an object made of an electrically-non-conductive/non-magnetic material, such as a finger. The object detecting device detects the shape of or the distance from an object to be measured, which is placed on a detection surface and made of an electrically conductive or magnetic material, by using an electromagnetic induction. The object detecting device includes a first loop wire group of a plurality of first loop wires (1) arranged in parallel on the same plane, a second loop wire group of a plurality of second loop wires (2) arranged in parallel on the same plane, and a spacer (3) for keeping the distance between them at a constant. The plurality of the second loop wires (2) are individually arranged in a direction perpendicular to the plurality of the first loop wires (1). The object detecting device further includes a plurality of electromagnetic coupling portions for electromagnetically coupling the first loop wires and the second loop wires. A driver (20) drives the first loop wire group, and a detector (30) detects the change in the couplings of the electromagnetically coupling units from the second loop wire group.
-
Citations
12 Claims
-
1. An object detecting device that uses an electromagnetic induction to detect the shape of or the distance from an object to be measured made of an electrically conductive or magnetic material placed on a detection surface of the device, said device comprising:
-
a first loop wire group in which a plurality of first loop wires each having a plurality of coil-shaped portions are arranged on the same plane in parallel to one another; a second loop wire group in which a plurality of second loop wires each having a plurality of coil-shaped portions are arranged on the same plane in parallel to one another, the second loop wire group being arranged in parallel to the first loop wire group, and the plurality of the second loop wires being arranged in perpendicular to the plurality of the first loop wires, respectively; a spacer that keeps the distance between the first loop wire group and the second loop wire group constant; a plurality of electromagnetic coupling portions at which the first loop wires and the second loop wires are electromagnetically coupled to each other through the coil-shaped portions located at the intersections between the first loop wires and the second loop wires; a driver that is connected to one of the first loop wire group and the second loop wire group and drives the loop wire group connected thereto; and a detector that is connected to the other one of the first loop wire group and the second loop wire group and detects a change in the degree of electromagnetic coupling at each of the electromagnetic coupling portions from the loop wire group connected thereto. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An object detecting device that uses an electromagnetic induction to detect the shape of or the distance from an object to be measured made of an electrically conductive or magnetic material placed on a detection surface of the device, said device comprising:
-
a first loop wire group in which a plurality of first loop wires each having a plurality of coil-shaped portions are arranged on the same plane in parallel to one another; a second loop wire group in which a plurality of linear-shaped second loop wires are arranged on the same plane in parallel to one another, the second loop wire group being arranged in parallel to the first loop wire group, and the plurality of the second loop wires being arranged in perpendicular to the plurality of the first loop wires, respectively; a spacer that keeps the distance between the first loop wire group and the second loop wire group constant; a plurality of electromagnetic coupling portions at which the first loop wires and the second loop wires are electromagnetically coupled to each other through the coil-shaped portions located at the intersections between the first loop wires and the second loop wires; a driver that is connected to one of the first loop wire group and the second loop wire group and drives the loop wire group connected thereto; and a detector that is connected to the other one of the first loop wire group and the second loop wire group and detects a change in the degree of electromagnetic coupling at each of the electromagnetic coupling portions from the loop wire group connected thereto.
-
-
7. An object detecting device that uses an electromagnetic induction to detect the shape of or the distance from an object to be measured made of an electrically conductive or magnetic material placed on a detection surface of the device, said device comprising:
-
a first loop wire group in which a plurality of linear-shaped first loop wires are arranged on the same plane in parallel to one another; a second loop wire group in which a plurality of linear-shaped second loop wires are arranged on the same plane in parallel to one another, the second loop wire group being arranged in parallel to the first loop wire group, and the second loop wires being arranged in perpendicular to the first loop wires; a spacer that keeps the distance between the first loop wire group and the second loop wire group constant; a plurality of electromagnetic coupling portions at which the first loop wires and the second loop wires are electromagnetically coupled to each other through a plurality of conductive plates located in the vicinity of the intersections between the first loop wires and the second loop wires; a driver that is connected to one of the first loop wire group and the second loop wire group and drives the loop wire group connected thereto; and a detector that is connected to the other one of the first loop wire group and the second loop wire group and detects a change in the degree of electromagnetic coupling at each of the electromagnetic coupling portions from the loop wire group connected thereto. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification