JPS59152461U - Rotation speed detection device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figures 1 to 6 are for explaining a conventional photoelectric detection device. Figure 1 is a cross-sectional view of the photoelectric detection device, and Figure 2 is a cross-sectional view of the
Figure 3 is a front view of the index scale, Figure 4 is a partial front view of the main scale, Figure 5 is a circuit diagram of the detection device, and Figure 6 is an output waveform diagram. , and FIGS. 7 to 10 each illustrate a photoelectric detection device according to an embodiment of this invention. FIG. 7 is a sectional view of the photoelectric detection device, and FIG. 8 is a view taken from the direction of arrow B in FIG. FIG. 9 is a circuit diagram of the detection device, and FIG. 10 is an output waveform diagram. In the figures, the same reference numerals indicate the same or corresponding parts; 1.
2 is a light emitting element, 5.6 is a light receiving element, 9 is an index scale, 10 is a main scale, 12 is a rotation axis, 16.
17 is a semi-transparent plate, 18° and 19 are fixed resistors. ) 13 αRho 1Oα Figure 5 correction 1982. 9. 2. The name of the device shall be amended as follows. ■The scope of the claim for registration of a detection device utility model shall be amended as follows. 0 Utility Model Registration Claims (1) A first device having a plurality of light-emitting elements, a light-receiving element that receives light emitted from each of these light-emitting elements, and a plurality of slits through which each of the above-mentioned lights passes. A slit plate is formed with equally spaced slits, and as it rotates with the rotation of the rotating body, the light passing through the slit portion of the first slit plate is periodically blocked and passed. A detection device comprising: a second slit plate for adjusting the amount of passing light; and a passing light amount adjusting plate for adjusting the amount of passing light due to the unique variations i between the light emitting element and the light receiving element. (2) The detection device according to claim 1, wherein the passing light amount adjustment plate that adjusts the amount of passing light is a semi-transparent plate. The brief description of the drawing has been amended as follows. ~Statement box 9
"Photoelectric detection device" on the 20th line of the page is corrected to "detection device.""Photoelectric detection device" in the first line of page 10 of the specification is corrected to "detection device.""Photoelectric detection device" on page 10, line 6 of the specification is corrected to "detection device.""Photoelectric detection device" on page 1, line 7 of the specification is corrected to "detection device."

Claims (3)

[Scope of utility model registration request] (1) A plurality of light-emitting elements, a light-receiving element that receives light emitted from each of these light-emitting elements, and a first slit plate in which a plurality of slit portions through which each of the above-mentioned lights passes are formed, at equal intervals. a second slit plate in which slits are formed, and the second slit plate periodically blocks and passes the light passing through the slit portion of the first slit plate by rotating with the rotation of the rotating body; A rotation speed detecting device comprising a passing light amount adjustment plate that adjusts the amount of passing light due to individual variations between the light emitting element and the light receiving element. (2) The rotational speed detecting device according to claim 1, wherein the slit portion of the first slit plate has a plurality of slits formed at equal pitches. (3) The rotational speed detecting device according to claim 1, wherein the passing light amount adjusting plate for adjusting the amount of passing light is a semi-transparent plate.