JPS61127461U

JPS61127461U -

Info

Publication number: JPS61127461U
Application number: JP1167385U
Authority: JP
Priority date: 1985-01-30
Filing date: 1985-01-30
Publication date: 1986-08-09

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク図、
第２図は上記実施例における正方向回転時の各部
信号の一例を示すタイムチヤート、第３図は逆方
向回転時の各部信号を示すタイムチヤート、第４
図はメータセンサの一般的構成を示すブロツク図
、第５図は従来のメータセンサの回転方向検出回
路の構成例を示すブロツク図、第６図および第７
図はそれぞれ上記従来例における正回転時および
逆回転時の各部信号を示すタイムチヤートである
。図において、１：回転体、２：永久磁石、３：
磁気センサ、４：加減算パルス出力回路、５：ア
ツプダウンカウンタ、６：表示部、７：電源部、
８：遅延回路、９：遅延回路、１０，１１：回転
方向検出回路、ＥＸ１：第１の排他的論理和回路
、ＥＸ２：第２の排他的論理和回路、Ａ１，Ａ２
：第１および第２のアンドゲート、Ｕ：加算パル
ス、Ｄ：減算パルス、ａ：回転パルス、ｂ：遅延
回転パルス、ｃ，ｄ：制御信号、ｅ：回転パルス
、ｆ：遅延回転パルス、ｇ：第１の排他的論理和
の出力信号、ｈ：第１の排他的論理和の反転信号
。 FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a time chart showing an example of signals of each part during forward rotation in the above embodiment, FIG. 3 is a time chart showing signals of each part during reverse rotation, and FIG.
The figure is a block diagram showing the general configuration of a meter sensor, FIG. 5 is a block diagram showing a configuration example of a rotation direction detection circuit of a conventional meter sensor, and FIGS.
The figures are time charts showing signals of various parts during forward rotation and reverse rotation in the conventional example. In the figure, 1: rotating body, 2: permanent magnet, 3:
Magnetic sensor, 4: Addition/subtraction pulse output circuit, 5: Up/down counter, 6: Display section, 7: Power supply section,
8: Delay circuit, 9: Delay circuit, 10, 11: Rotation direction detection circuit, EX1: First exclusive OR circuit, EX2: Second exclusive OR circuit, A1, A2
: first and second AND gate, U: addition pulse, D: subtraction pulse, a: rotation pulse, b: delayed rotation pulse, c, d: control signal, e: rotation pulse, f: delayed rotation pulse, g : output signal of the first exclusive OR, h: inverted signal of the first exclusive OR.

Claims

[Claims for Utility Model Registration] A permanent magnet fixed to a rotating body, a magnetic sensor that outputs two series of signals with different phases according to the rotation of the permanent magnet, and two series of signals output from the magnetic sensor. an addition/subtraction pulse output circuit that inputs an addition pulse or a subtraction pulse according to the rotational direction of the rotating body; and an up/down pulse output circuit that counts up the addition pulse output from the addition/subtraction pulse output circuit and counts down the addition pulse by the subtraction pulse. In a meter sensor that includes a counter and a display section that displays the inside of the up-down counter, the addition/subtraction pulse output circuit includes a first exclusive OR circuit that takes an exclusive OR of two series of signals output from the magnetic sensor. a rotational direction detection circuit that controls the opening and closing of the first and second AND gates described later by the output signal of the OR circuit and its inverted signal; The second
a first AND gate that is opened by the output of the first exclusive OR circuit of the rotation direction detection circuit and passes the output of the second exclusive OR circuit; and a second AND gate that is opened by an inverted signal of the output of the first exclusive OR circuit of the rotation direction detection circuit and allows the output of the second exclusive OR circuit to pass through. A meter sensor featuring: