Title:
【発明の名称】第1物体と第2物体の間の距離を検知する方法及び装置
Document Type and Number:
Japanese Patent JPH11512803
Kind Code:
A
Abstract:
PCT No. PCT/DK96/00408 Sec. 371 Date Mar. 25, 1998 Sec. 102(e) Date Mar. 25, 1998 PCT Filed Sep. 25, 1996 PCT Pub. No. WO97/12174 PCT Pub. Date Apr. 3, 1997A method and device for sensing the distance between a first object and a second object so as to activate or facilitate predetermined actions when the distance has attained a certain value. A person (1) (first object) holds a handle (2) of a power tool, the handle being connected to a function generator (6) for a signal in turn connected to a unit (7) for encoding or modulating the signal. A capacitance (C1) exists between the hand of a person (1) and the handle (2). A capacitance (C2) exists between the person (1) and the active portion (4) (second object) of the tool connected to a demodulator or tone decoder (8) in turn connected to a control unit (9) incorporating the control circuitry. The control unit (9) controls the security system (10) in turn controlling the protective measures such as braking or power cut-off (11). The control unit (9) also controls an alarm and self-testing circuitry (11a).
Inventors:
Serensen, Jerun
Application Number:
JP51309297A
Publication Date:
November 02, 1999
Filing Date:
September 25, 1996
Export Citation:
Assignee:
Serensen, Jerun
International Classes:
B23Q11/00; B27B17/08; B28D1/14; F16P3/14; G01B7/02; H02H5/12; (IPC1-7): F16P3/14; B23Q11/00
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)