Line sensor
AssigneeHitachi Metals, Ltd.
InventorYukio IKEDA
Life of this patent
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Abstract
A line sensor includes a sensor cord including a resilient hollow insulator and two electrical wires arranged along an inner circumferential surface of the hollow insulator in an electrically non-contact state with each other, a constant current source which is connected to one of the two electrode wires at one end of the sensor cord, and a detecting device for detecting a pressed position. The other electric wire is grounded at the other end of the sensor cord. The two electric wires include a resistance wire having a resistance of 1 kΩ/m or more. The detecting device detects a voltage of the resistance wire at one end of the sensor cord to detect the pressed position in a longitudinal direction of the sensor cord based on the detected voltage.
Claims7
A line sensor, comprising:
- a sensor cord comprising a resilient hollow insulator and two electrical wires arranged along an inner circumferential surface of the hollow insulator in an electrically non-contact state with each other;
- a constant current source which is connected to one of the two electrode wires at one end of the sensor cord;
- and
- a detecting device for detecting a pressed position,
- wherein the other electric wire is grounded at the other end of the sensor cord,
- wherein the two electric wires include a resistance wire having a resistance of 1 kΩ/m or more, and
- wherein the detecting device detects a voltage of the resistance wire at one end of the sensor cord to detect the pressed position in a longitudinal direction of the sensor cord based on the detected voltage.
Dependencies are inferred from the claim text.