Title:
INDICATOR FOR RELATIVE POSITION
Document Type and Number:
Japanese Patent JPS61184407
Kind Code:
A
Abstract:
Typical apparatus as shown in Figures 1 and 12 for indicating the relative positions in a given direction between a reference point (24, 59) and a test point (29, 68) spaced therefrom and movable relative thereto is useful for measurement of the magnitude and direction of static or dynamic torque in a shaft (8). Overlapping transparent reference (20, 60) and test surfaces (25, 61), either parallel disks (60, 61) or coaxial cylinders (25, 25) each having a relevant portion covered with a plurality of equally spaced lines oriented predominatly normal to the given direction and at an angle to each other, produce moire fringes (30) when illuminated (14, 15). One of the surfaces (25, 61), being flexible, is connected to the shaft (8) so as to flex in response to torque between the reference point (24, 59) and the test point (29, 68), causing a change in the angle between the lines on the two surfaces (20, 25; 60, 61), and thus of the spacing (D) (Figure 3) of the moire fringe bands (30), which is optically detected (17) and converted, as shown in Figure 4, to an electrical signal (42) to control power applied to the shaft (8).
Inventors:
SHII FUREDERITSUKU RENNAA
RICHIYAADO KEI ZATSUCHIYAA
UIRIAMU JII ATSUTAABARII
JIEREMII EMU HARISU
NAIRU EFU HAATOMAN
ROBAATO BII MATSUKUKOUN
RICHIYAADO KEI ZATSUCHIYAA
UIRIAMU JII ATSUTAABARII
JIEREMII EMU HARISU
NAIRU EFU HAATOMAN
ROBAATO BII MATSUKUKOUN
Application Number:
JP28539485A
Publication Date:
August 18, 1986
Filing Date:
December 18, 1985
Export Citation:
Assignee:
BATTELLE MEMORIAL INSTITUTE
International Classes:
G01B11/00; G01D5/26; G01D5/38; G01D5/36; G01L1/24; G01L3/08; G01L3/12; (IPC1-7): G01B11/00; G01D5/38
Domestic Patent References:
| JP55127211B | ||||
| JPS5198069A | 1976-08-28 | |||
| JPS521323U | 1977-01-07 |
Attorney, Agent or Firm:
Kyozo Yuasa