JPS6080310U

JPS6080310U - Rotation speed detection device

Info

Publication number: JPS6080310U
Application number: JP17053483U
Authority: JP
Inventors: 俊彦池田
Original assignee: シャープ株式会社
Priority date: 1983-11-02
Filing date: 1983-11-02
Publication date: 1985-06-04

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１および第２図は従来例を、第３〜第５図は″本考案
の実施例を示し、第１図は従来の回転数検知装置のブロ
ック図、第２図は第１、第２センサからの第１、第２パ
ルス信号の波形図、第３図は本考案の一実施例のブロン
、り図、第４図は、本実施例の要部の詳細ブロック図、
第５図は本実施例の動作を説明するためのタイミングチ
ャートである。第１手段（第１モノマルチバイブレータ）・・曲４３、
第２手段・・・・・・４４、第１比較手段（第１アンド
回路）・・・・・・４５、第２比較手段（第２アンド　
−回路）・・・・・・４６゜1 and 2 show a conventional example, and 3 to 5 show an embodiment of the present invention. FIG. 1 is a block diagram of a conventional rotation speed detection device, and FIG. A waveform diagram of the first and second pulse signals from the sensor, FIG. 3 is a block diagram of an embodiment of the present invention, and FIG. 4 is a detailed block diagram of the main parts of the embodiment.
FIG. 5 is a timing chart for explaining the operation of this embodiment. First means (first mono multivibrator)...Song 43,
Second means...44, First comparison means (first AND circuit)...45, Second comparison means (second AND circuit)...45, Second comparison means (second AND circuit)...45, Second comparison means (second AND circuit)...45, Second comparison means (second AND circuit)...
- circuit)...46°

Claims

[Scope of utility model registration request]

For a rotating body such as a tape reel, the first sensor detects the rotation of the rotating body and outputs a first pulse signal corresponding to the speed of rotation, and the second sensor outputs a second pulse signal. and the sensors are arranged at different angles to each other, and this first
In the rotation speed detection device that detects the rotation speed of a rotating body based on pulse signals from a sensor and a second sensor, the first
a first means for outputting a third pulse signal in response to a rising edge of the first pulse signal from the sensor; a second means for outputting a fourth pulse signal in response to a falling edge of the first pulse signal; a first comparison that compares a second pulse signal from the second sensor and a third pulse signal from the first means, and outputs a first coincidence signal when both signals are at high level (or low level); means for comparing a second pulse signal from the second sensor and a fourth pulse signal from the second means, and outputting a second coincidence signal when both signals are at a high level (low level); 2 comparing means, counting the number of pulses of each of the second matching signal outputted from the second comparing means and the first matching signal of the first comparing means,
and means for subtracting or adding both count values,
A rotation speed detection device characterized by preventing counting errors that occur at the start of rotation, etc.