JPS62155371U

JPS62155371U -

Info

Publication number: JPS62155371U
Application number: JP4348086U
Authority: JP
Priority date: 1986-03-25
Filing date: 1986-03-25
Publication date: 1987-10-02

Description

[Brief explanation of drawings]

第１図は本考案の回転数検出装置のブロツク系
統図、第２図は従来の回転数検出装置の概要を説
明するためのブロツク系統図である。Ｉ_ｆ……被測定周波数、１，８……ゲート回路
、２……基準周波数発信器、Ｓ_ｆ……基準周波数
、３，９……カウンタ、４，６……分周回路、５
……周波数レンジ確認回路、７……選択回路、１
０……回転数演算回路。 FIG. 1 is a block system diagram of the rotation speed detection device of the present invention, and FIG. 2 is a block system diagram for explaining the outline of a conventional rotation speed detection device. I _f ...Frequency to be measured, 1, 8... Gate circuit, 2... Reference frequency oscillator, S _f ... Reference frequency, 3, 9... Counter, 4, 6... Frequency dividing circuit, 5
...Frequency range confirmation circuit, 7...Selection circuit, 1
0...Rotation speed calculation circuit.

Claims

[Scope of utility model registration request]

In a rotation speed detection device that inputs a frequency to be measured generated by a rotating body to be measured and detects the rotational speed of the rotating body to be measured based on a reference frequency from a reference frequency oscillator, confirming the range of the frequency to be measured. a frequency range confirmation circuit that outputs a range signal based on the range signal; a plurality of frequency dividing circuits provided to divide the reference frequency into a plurality of frequencies; a selection circuit for selecting one of the divided reference frequencies; a gate circuit to which the reference frequency selected and divided by the selection circuit and the frequency to be measured are guided; A rotation speed detection device comprising: a counter that counts a frequency; and a rotation speed calculation circuit that calculates the rotation speed of the rotating body to be measured based on the counter value of the counter and the range signal.