JPS6132967U - Pulse transmission circuit - Google Patents

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

【図面の簡単な説明】[Brief explanation of drawings]

・第１図は本考案のパルス伝達回路の一実施例を示すブ
ロック図、第２図〜第４図は同実施例の作動を示すタイ
ムチャート、第５図は従来技術である。 ５０・・・・・・回転体、１・・・・・・第１パルス発
生器、２・・・・・・第２パルス発生器、１１・・・・
・・第１エッジ検出回路、２１・・・・・・第２エッジ
検出回路、１２・・・・・・第１分周回路、２２・・・
・・・第２分周回路、１３・・・・・・第１エッジ判別
回路、２３・・・・・・第２エッジ判別回路、１４・・
・・・・第１ラッチ回路、２４・・・・・・第２ラッチ
回路、３０・・・・・・弁別回路、３１・・・・・・切
換回路。- Fig. 1 is a block diagram showing one embodiment of the pulse transmission circuit of the present invention, Figs. 2 to 4 are time charts showing the operation of the same embodiment, and Fig. 5 is a conventional technique. 50... Rotating body, 1... First pulse generator, 2... Second pulse generator, 11...
...First edge detection circuit, 21...Second edge detection circuit, 12...First frequency dividing circuit, 22...
...Second frequency dividing circuit, 13...First edge discrimination circuit, 23...Second edge discrimination circuit, 14...
...First latch circuit, 24...Second latch circuit, 30...Discrimination circuit, 31...Switching circuit.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] （１）一つの回転体の回転速度に応じた周波数のパルス
をそれそれ出力する第１および第２パルス発生器を備え
、一方のパルス発生器からのパルスを伝達するパルス伝
達回路において、 前記両パルス発生器からのそれぞれのパルスのエツシを
検出する第１および第２エッジ検出回路と、前記両パル
ス発生器からのそれぞれのパルスを１／ｎ（ただし、ｎ
は１以上の整数）に分周する第１および第２分周回路と
、該第２分周回路からの第２分周パルスの１周期におけ
る第１エッジ検出回路からの第１エッジ信号の有無を判
別する第１エッジ判別回路と、該第１エツシ判別回路か
らの第１判別信号を前記第２分周パルスによりラッチす
る第１ラッチ回路と、前記第１分周回路からの第１分周
パルスの１周期における第２エッジ検出回路からの第２
エツシ信号の有無を判別する第２エッジ判別回−路と、
該第２エッジ判別回路からの第２判別信号を前記第１分
周パルスによりラッチする第２ラッチ回路と、これら両
ラッチ回路からのラツチ出力にもとづいて正常なパルス
発生器を弁別する弁別回路と、該弁別回路からの弁別信
号にもとつき両パルス発生器が正常なときいずれが一方
からのパルスを選択し一方が異常なとき他方からの正常
なパルスを選択する切換回路と、を設けて成るパルス伝
達回路。(1) A pulse transmission circuit that includes first and second pulse generators that output pulses with a frequency corresponding to the rotational speed of one rotating body, and that transmits pulses from one of the pulse generators, first and second edge detection circuits for detecting the edge of each pulse from the pulse generator;
is an integer greater than or equal to 1), and the presence or absence of a first edge signal from the first edge detection circuit in one period of the second frequency-divided pulse from the second frequency divider circuit. a first edge discriminating circuit that discriminates, a first latch circuit that latches a first discrimination signal from the first edge discriminating circuit with the second frequency dividing pulse, and a first frequency dividing circuit from the first frequency dividing circuit. the second edge from the second edge detection circuit during one period of the pulse.
a second edge determination circuit that determines the presence or absence of an edge signal;
a second latch circuit that latches a second discrimination signal from the second edge discrimination circuit using the first frequency-divided pulse; and a discrimination circuit that discriminates a normal pulse generator based on the latch outputs from both of these latch circuits. , and a switching circuit that selects a pulse from one of the pulse generators when both pulse generators are normal, and selects a normal pulse from the other when one of the pulse generators is abnormal, based on the discrimination signal from the discrimination circuit. A pulse transmission circuit consisting of （２）前記回転体を舶用主機関推進軸とした実用新案登
録請求の範囲第１項記載のパルス伝達回路。(2) The pulse transmission circuit according to claim 1, in which the rotating body is a marine main engine propulsion shaft.