JPH02604U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the external appearance of one embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of the rotation detection mechanism of the above embodiment, and Fig. 3 is a plan view of the gear section and rotating body in this embodiment. , Fig. 4 is a diagram showing the rotating body and light emitting/receiving element of the first embodiment, Fig. 5 is a peripheral view of the measuring wheel of the present embodiment, and Fig. 6 is a diagram showing the parts other than those shown in Fig. 2 of the present embodiment. , FIG. 7 is a basic circuit configuration diagram of this embodiment, FIG. 8 is a diagram showing the pulse generation circuit of the first embodiment, and FIG. 9 is a diagram showing the slow rotation of the rotating body of the first embodiment. Figure 10 shows the output waveform of the phototransistor 71 and the output waveform of the comparator 46 and the waveform of the 1 KHz pulse signal when the rotation speed is a little faster in the first embodiment. FIG. 11 is a diagram showing the output waveform of the phototransistor 71, the output waveform of the comparator 46, and the waveform of the 1 KHz pulse signal in the first embodiment. FIG. 13 is a diagram showing the output waveforms of the two delay circuits 48, 53 and the comparator 46 of the first embodiment, FIG. 13 is a plan view of the rotating body of the second embodiment, and FIG. 14 is a diagram of the second embodiment. FIG. 15 is a diagram showing a rotating body and a light emitting/receiving element, FIG. 15 is a diagram showing a pulse generation circuit of the second embodiment, and FIG. 16 is a diagram showing a photo transistor 29 and a phototransistor when the rotating body of the second embodiment is rotating slowly A diagram showing the output waveform of the transistor 30,
FIG. 17 is a diagram showing the output waveforms of the phototransistor 29 and the phototransistor 30 when the second embodiment rotates at a slightly fast speed, and FIG. 18 shows the output waveforms of the phototransistor 29 and the phototransistor when the second embodiment rotates at a fast speed. FIG. 5...Measuring wheel, 9...Rotating body of the first embodiment, 1
0...First through hole, 11...Second through hole, 1
2... Light emitting element, 13... Light receiving element, 28... Rotating body of the second embodiment, 29... Photo transistor, 30... Photo transistor, 40... Arithmetic circuit, 41... Pulse generating circuit, 42 ... Distance register, 45 ... Switching transistor, 4
6... Comparator, 47, 51, 58, 60...
...and gate, 48...first delay circuit, 49
...First quaternary counter circuit, 50...First counter circuit, 52...Comparison calculation circuit, 53...Second delay circuit, 54...Register, 55...Second
Quaternary counter circuit, 59...D flip-flop circuit, 61... Counter circuit, 62, 66...
Inverter, 63... Delay circuit, 64... Comparison circuit, 65... Pulse number storage circuit, 70... Light emitting diode, 71... Photo transistor.

Claims (1)

[Scope of utility model registration request] A rotating body comprising a plurality of first through holes provided at equal intervals on a constant radius along the rotation direction and at least one second through hole wider than the first through hole. , a light emitting element that emits light on one side of the rotating body, a light receiving element that receives light from the light emitting element on the other side, and an optical signal that passes through the first through hole from which the light emitting element emits light. and the second
identification means for identifying an optical signal passing through the through hole;
A distance measuring device comprising: a calculation means for calculating distance data based on the optical signal identified by the identification means; and a display means for displaying the distance data.