JPH0447691U - - Google Patents
Info
- Publication number
- JPH0447691U JPH0447691U JP8992190U JP8992190U JPH0447691U JP H0447691 U JPH0447691 U JP H0447691U JP 8992190 U JP8992190 U JP 8992190U JP 8992190 U JP8992190 U JP 8992190U JP H0447691 U JPH0447691 U JP H0447691U
- Authority
- JP
- Japan
- Prior art keywords
- reference clock
- vsin
- vcos
- signals
- clock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measurement Of Unknown Time Intervals (AREA)
Description
第１図は本考案に係る時間計測装置の一実施例
を示す構成図、第２図は第１図の装置における動
作説明用のタイムチヤート、第３図は測定対象パ
ルス幅信号を示す図である。
１……クロツク発生器、２……ｓｉｎ波発振器
、３……ｃｏｓ波発振器、４……カウンタ、５，
６……コンパレータ、７，８，９，１０……ＡＤ
変換器、１１，１２……メモリ、１３……演算器
、１４……データバス。
FIG. 1 is a configuration diagram showing an embodiment of a time measuring device according to the present invention, FIG. 2 is a time chart for explaining the operation of the device in FIG. 1, and FIG. 3 is a diagram showing a pulse width signal to be measured. be. 1...Clock generator, 2...Sin wave oscillator, 3...Cos wave oscillator, 4...Counter, 5,
6...Comparator, 7, 8, 9, 10...AD
Converter, 11, 12...Memory, 13...Arithmetic unit, 14...Data bus.
Claims (1)
生器と、 前記基準クロツクに同期し、かつ位相が互いに
９０°異なる２つの信号を発生する手段と、 前記基準クロツクを計数するカウンタと、 被測定信号をあるしきい値で２値化するコンパ
レータと、 このコンパレータの出力を変換クロツクとし、
前記手段より与えられる位相が互いに９０°異な
る２つの信号をそれぞれ高速にデジタル変換する
複数のＡＤ変換器と、 高速書き込みが可能で、前記カウンタの出力値
および前記複数のＡＤ変換器の出力値を記憶する
メモリと、 このメモリの記憶値から下記の式に基づいて被
測定信号の前記基準クロツクに対する位相差を演
算する演算器 を具備し、前記ＡＤ変換器の変換速度と同じ速度
までの被測定信号連続測定を可能としたことを特
徴とする時間計測装置。 Ｖｓｉｎ＝Ａ・ｓｉｎ（ω・△Ｔ） ……(1) Ｖｃｏｓ＝Ａ・ｃｏｓ（ω・△Ｔ） ……(2) △Ｔ＝（１／ω）ａｒｃｓｉｎ（Ｖｓｉｎ／Ａ
）……(3) △Ｔ＝（１／ω）ａｒｃｃｏｓ（Ｖｃｏｓ／Ａ
）……(4) ＴＡｎ＝Ｎ・ｔ０＋△Ｔ ……(5) （ただし、ｎ＝１，２，３…） ここに、ＴＡｎは被測定信号の立ち上がり時刻
、△ＴはＴＡｎと基準クロツクの位相差、ωはｔ
０／２π，ＶｓｉｎおよびＶｃｏｓは位相が互い
に９０°異なる２つの信号の時刻ＴＡｎでのＡＤ
変換値である。[Claims for Utility Model Registration] A clock generator that generates a reference clock with a period t0 , means for generating two signals that are synchronized with the reference clock and whose phases differ by 90 degrees from each other, and a clock generator for counting the reference clock. a comparator that binarizes the signal under test at a certain threshold, and the output of this comparator is used as a conversion clock.
a plurality of AD converters that convert two signals provided by the means that have phases different from each other by 90 degrees into digital signals at high speed; The device is equipped with a memory for storing data, and an arithmetic unit that calculates the phase difference of the signal to be measured with respect to the reference clock based on the following formula from the stored value in this memory, and the device is equipped with A time measuring device characterized by being capable of continuous signal measurement. Vsin=A・sin(ω・△T) ……(1) Vcos=A・cos(ω・△T) ……(2) △T=(1/ω) arcsin(Vsin/A
)...(3) △T=(1/ω) arccos(Vcos/A
)...(4) TA n =N・t 0 +△T...(5) (However, n=1, 2, 3...) Here, TAn is the rising time of the signal under test, and △T is TA n and the reference clock phase difference, ω is t
0 /2π, Vsin and Vcos are the AD at time TA n of two signals whose phases differ by 90° from each other.
It is a converted value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8992190U JPH0447691U (en) | 1990-08-28 | 1990-08-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8992190U JPH0447691U (en) | 1990-08-28 | 1990-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0447691U true JPH0447691U (en) | 1992-04-22 |
Family
ID=31824248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8992190U Pending JPH0447691U (en) | 1990-08-28 | 1990-08-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447691U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6263885A (en) * | 1985-08-21 | 1987-03-20 | Yokogawa Electric Corp | Time width measuring instrument |
-
1990
- 1990-08-28 JP JP8992190U patent/JPH0447691U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6263885A (en) * | 1985-08-21 | 1987-03-20 | Yokogawa Electric Corp | Time width measuring instrument |
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