JPS6425765U

JPS6425765U -

Info

Publication number: JPS6425765U
Application number: JP12061287U
Authority: JP
Priority date: 1987-08-06
Filing date: 1987-08-06
Publication date: 1989-02-13

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例のブロツク図、第２
図は第１図に示すブロツク図中の目標カウントパ
ルス発生回路９の動作を説明する波形図、第３図
は回転数計の一例の断面図、第４図はトルカの平
面図、第５図は本考案の動作を示す図、第６図は
従来の回転数計制御回路の一例のブロツク図であ
る。１……入力端子、２……入力回路、３……回転
数カウント回路、４……比較回路、５……位置検
出装置、６……回転位置カウント回路、７……ド
ライブ回路、８，１９……トルカ・コイル、９…
…目標カウントパルス発生回路、１０……減算回
路、１８……エンコーダ車、２１……インクリメ
ンタル型エンコーダ装置、２４……指針、２９…
…プリント配線基板。 Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a waveform diagram explaining the operation of the target count pulse generation circuit 9 in the block diagram shown in Figure 1, Figure 3 is a sectional view of an example of a rotation speed meter, Figure 4 is a plan view of the torquer, and Figure 5. 6 is a diagram showing the operation of the present invention, and FIG. 6 is a block diagram of an example of a conventional rotation speed meter control circuit. 1... Input terminal, 2... Input circuit, 3... Rotation count circuit, 4... Comparison circuit, 5... Position detection device, 6... Rotation position count circuit, 7... Drive circuit, 8, 19 ...Toruka Coil, 9...
...Target count pulse generation circuit, 10...Subtraction circuit, 18...Encoder wheel, 21...Incremental encoder device, 24...Pointer, 29...
...Printed wiring board.

Claims

[Claim for Utility Model Registration] The output value of a rotation speed counting circuit that obtains a value corresponding to each predetermined period of a rotation signal indicating the rotation speed of the object to be measured, and the position for detecting the rotational angular position of the encoder wheel. A comparator circuit compares the output value of the rotational position counting circuit that counts the output of the detection device, and based on the comparison result, the drive circuit drives the torquer coil attached to the encoder wheel. In a tachometer control device that controls the rotational angular position of an encoder wheel, target value data indicating the target angular position of the rotational angular position of the encoder wheel a predetermined period before the current time and the rotation at the current time. a subtraction circuit that performs subtraction with the output of the number counting circuit; and a subtraction circuit that generates a number of pulses corresponding to the subtraction result based on the subtraction result of the subtraction circuit and the current rotation signal at a predetermined period following the current predetermined period. A target count pulse generation circuit that generates the target count pulses approximately uniformly within Supplying the target value data to the subtraction circuit as target value data indicating a target angular position of the rotational angular position of the encoder wheel, and supplying the target value data to the comparison circuit as a signal corresponding to the output of the conventional rotational speed counting circuit. A tachometer control device comprising a target value counting circuit.