JPH01269121A - Sampling signal generator - Google Patents

Sampling signal generator

Info

Publication number
JPH01269121A
JPH01269121A JP9897388A JP9897388A JPH01269121A JP H01269121 A JPH01269121 A JP H01269121A JP 9897388 A JP9897388 A JP 9897388A JP 9897388 A JP9897388 A JP 9897388A JP H01269121 A JPH01269121 A JP H01269121A
Authority
JP
Japan
Prior art keywords
data
signal
pulse
memory
time
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
Application number
JP9897388A
Other languages
Japanese (ja)
Inventor
Osamu Maehara
修 前原
Takashi Hoshiyama
星山 隆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ono Sokki Co Ltd
Original Assignee
Ono Sokki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ono Sokki Co Ltd filed Critical Ono Sokki Co Ltd
Priority to JP9897388A priority Critical patent/JPH01269121A/en
Publication of JPH01269121A publication Critical patent/JPH01269121A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To efficiently fetch the change condition of an input analog signal to an external memory by generating a sampling command signal each time the differential value of the A/D converting data of an input analog signal exceeds a prescribed value. CONSTITUTION:The title generator is composed of an A/D converting part 10 and a pulse generating part 20. An input analog signal is sent to the pulse generating part 20 converted to the digital data by the A/D converting part 10. The pulse generating part 20 calculates the differential value of the introduced data and generates a pulse-shaped output each time it exceeds the value specified beforehand. The pulse-shaped output is impressed to a memory as a sampling command signal, and when the data of the A/D converting part are introduced into the memory, the data are stored each time the sampling command signal is impressed. Thus, without enlarging the memory capacity, the generator of the sampling signal to fetch the data, in which the input signal can be faithfully reproduced, is obtained.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は、入力アナログ信号をディジタル信号に変換
してメモリにストアするに際し、そのメモリへのデータ
取込タイミングを指令するサンプリング信号の発生器に
関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sampling signal generator that instructs the timing of data acquisition into a memory when an input analog signal is converted into a digital signal and stored in the memory.

従来の技術 この種のものには、水晶発振器とその分周回路とからな
り、予め分周回路により定めた一定周期ごとにパルス状
のサンプリング信号を発生するようにしたものがある。
BACKGROUND OF THE INVENTION Some devices of this type include a crystal oscillator and a frequency dividing circuit thereof, and are configured to generate a pulse-like sampling signal at regular intervals predetermined by the frequency dividing circuit.

発明が解決しようとする課題 しかしながら、この定周期サンプリング信号によりメモ
リへデータの取込みを行なうと、データの変化率が大き
い程、その間にサンプルされるデータ数が少なくなり、
その記憶データを再現した場合に変化状態が明確にとら
えられないという問題点がある。すなわち、例えば第3
図(、)に示すように時間(1)の経過に対してロボッ
トアームのY方向の変位(Y)が初期に急激に変化した
場合、定周期サンプリング信号により取込まれるデータ
は、同(b)の破線枠に示すように小数となり、もし、
この中に変曲点が一つでなく二つあったとすると、それ
を取込データから再現することは不可能となる。
Problems to be Solved by the Invention However, when data is loaded into memory using this fixed-period sampling signal, the larger the rate of change in data, the smaller the number of data sampled during that period.
There is a problem in that when the stored data is reproduced, the state of change cannot be clearly understood. That is, for example, the third
As shown in the figure (,), when the displacement (Y) of the robot arm in the Y direction changes rapidly at the beginning with respect to the passage of time (1), the data acquired by the periodic sampling signal is ) as shown in the dashed line frame, and if
If there were two inflection points instead of one, it would be impossible to reproduce them from the captured data.

これを解釈するには、サンプリング信号の周期を短くす
ればよいが、そうすると、メモリには大容量が必要とな
ってしまう。
To interpret this, it is possible to shorten the period of the sampling signal, but this would require a large memory capacity.

本発明は、メモリ容量を大にすることなく、入力信号の
忠実な再現が可能なデータの取込を行なえるサンプリン
グ信号の発生器を提供するものである。
The present invention provides a sampling signal generator that can capture data that can faithfully reproduce an input signal without increasing memory capacity.

課題を解決するための千道 いま、記憶データ数が限られた中での入力信号の再現を
検討するのに、変化が大きな部分ではその再現に多くの
データが必要であるが、変化が小さい場合にはデータは
小数でもよいわけである。すなわち、データの取込周期
を入力信号の変化に応じて変え、必要な部分での取込数
を大にすれば、全体のデータ取込数を増加させることな
く、入力信号の再現が忠実に行なえることになる。
A thousand ways to solve the problem.Currently, we are considering reproducing the input signal when the amount of stored data is limited.In areas where the changes are large, a large amount of data is required to reproduce them, but where the changes are small. In some cases, the data may be decimal. In other words, by changing the data acquisition cycle according to changes in the input signal and increasing the number of acquisitions in the necessary parts, the input signal can be faithfully reproduced without increasing the overall number of data acquisitions. It will be possible to do it.

本発明は、上記検討に基づいたサンプリング信号の発生
器であり、入力アナログ信号のA/D変換部と、そのA
/D変換データの微分値が所定値を越えるごとにパル又
状出力を発生するパルス発生部とからなる。
The present invention is a sampling signal generator based on the above study, and includes an A/D converter for an input analog signal and its A/D converter.
and a pulse generator that generates a pulse-shaped output every time the differential value of the /D conversion data exceeds a predetermined value.

艷肌 これにおいて、入力アナログ信号はA/D変換部により
ディノタルデータに変換され、パルス発生部に送られる
。パルス発生部では、この導入データの微分値を算出し
、それが予め定めた値を越えるごとにパルス状出力を発
生する。このパルス状出力がメモリにサンプリング指令
信号として印加されることになり、いま、メモリに前記
A/D変換部のデータを導入しておくと、このサンプリ
ング指令信号が印加されるごとに、データの記憶が行な
われる。
In this, the input analog signal is converted into digital data by the A/D converter and sent to the pulse generator. The pulse generator calculates the differential value of this introduced data, and generates a pulse-like output every time the differential value exceeds a predetermined value. This pulse-like output will be applied to the memory as a sampling command signal, and if the data of the A/D converter is introduced into the memory now, each time this sampling command signal is applied, the data will be Memory takes place.

しかして、このサンプリング指令信号は、入力信号の変
化率が大のときにはそれに応じた短い時間間隔で、変化
率が小のときにはそれに応じた長い時間間隔で送出され
る結果、メモリには入力信号の変化率が大の状態ではデ
ータが短い時間間隔で取込まれ、逆に変化が小の状態で
は長い時間間隔で取込まれる。
As a result, the sampling command signal is sent out at short time intervals when the rate of change of the input signal is large, and at long time intervals when the rate of change is small. When the rate of change is large, data is captured at short time intervals; conversely, when the rate of change is small, data is captured at long time intervals.

X1目I si図において、1はサンプリング信号発生器であり、
その内部のA/D変換u10に入力アナログ信号が導入
され、そのA/D変換部10の最下位桁の出力がパルス
発生部20に導入され、パルス発生部20ではそこに導
入される最下位桁信号が変化するごとにパルス出力を発
生する。30は前記A/D変換部10の変換データが導
入されているメモリであり、前記パルス発生部20のパ
ル入出力がサンプル指令信号としてこのメモリ30に印
加されている。
In the X1 eye I si diagram, 1 is the sampling signal generator,
An input analog signal is introduced into the internal A/D converter u10, and the output of the lowest digit of the A/D converter 10 is introduced into the pulse generator 20. Generates a pulse output every time the digit signal changes. Reference numeral 30 denotes a memory into which the conversion data of the A/D converter 10 is introduced, and the pulse input/output of the pulse generator 20 is applied to this memory 30 as a sample command signal.

これにおいては、A/D変換部10の最下位桁が変化す
るごとに、すなわち、入力アナログ信号がA/D変換部
の分解能分だけ変化するごとにパルス発生1120から
サンプリング指令信号の送出があり、そのときのA/D
変換データがメモリ30に取込まれる。
In this case, a sampling command signal is sent from the pulse generator 1120 every time the least significant digit of the A/D converter 10 changes, that is, every time the input analog signal changes by the resolution of the A/D converter. , A/D at that time
Conversion data is captured into memory 30.

第2図はパルス発生部の他の実施例であり、A / D
変換部10の変換データは、外部メモリ30に送出され
ると共に、パル又発生部20゛の遅延部21と比較部2
2にそれぞれ導入され、遅延部21.ではその導入デー
タをA/D変換周期だけ遅延して比較部22に送出する
。そして、比較部ではその両導入データ、すなわち前後
のA/D変換データを比較し、その差が予め設定された
所定値を越えるごとにパルス出力を送出する。
FIG. 2 shows another embodiment of the pulse generator, and the A/D
The converted data of the converter 10 is sent to the external memory 30, and is also sent to the delay unit 21 of the pulse generator 20' and the comparator 2.
2, respectively, and the delay unit 21. Then, the introduction data is delayed by the A/D conversion period and sent to the comparison section 22. Then, the comparing section compares both introduced data, that is, the previous and subsequent A/D converted data, and sends out a pulse output every time the difference exceeds a predetermined value.

したがって、これにおいても、入力アナログ信号の微分
値が所定値を越えるごとにサンプリング指令信号として
のパルス出力が発生させられる。
Therefore, also in this case, a pulse output as a sampling command signal is generated every time the differential value of the input analog signal exceeds a predetermined value.

発明の効果 以上のとおりであり、本発明は、入力アナログ信号のA
/D変換データの微分値が所定値を越えるごとにサンプ
リング指令信号を発生するので、外部のメモリには入力
アナログ信号の変化状態を効率よく取込むことかで外、
例えば、X、Y二次元のりサージュ波形の正確な形成に
有効である。
The effects of the invention are as described above, and the present invention has the following advantages:
Since a sampling command signal is generated every time the differential value of /D conversion data exceeds a predetermined value, external memory can efficiently capture the changing state of the input analog signal.
For example, it is effective for accurately forming an X, Y two-dimensional glue surge waveform.

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

第1.2図は本発明の実施例を示すブロック線図である
。 1 : サンプリング信号発生器 10:A/D変換部 20.20’:  パルス発生部
FIG. 1.2 is a block diagram showing an embodiment of the present invention. 1: Sampling signal generator 10: A/D converter 20.20': Pulse generator

Claims (1)

【特許請求の範囲】[Claims] 1、入力アナログ信号のA/D変換部と、そのA/D変
換データの微分値が所定値を越えるごとにパルス状出力
を発生するパルス発生部とからなるところのサンプリン
グ信号発生器。
1. A sampling signal generator consisting of an A/D converter for an input analog signal and a pulse generator that generates a pulse-like output every time the differential value of the A/D converted data exceeds a predetermined value.
JP9897388A 1988-04-21 1988-04-21 Sampling signal generator Pending JPH01269121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9897388A JPH01269121A (en) 1988-04-21 1988-04-21 Sampling signal generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9897388A JPH01269121A (en) 1988-04-21 1988-04-21 Sampling signal generator

Publications (1)

Publication Number Publication Date
JPH01269121A true JPH01269121A (en) 1989-10-26

Family

ID=14233979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9897388A Pending JPH01269121A (en) 1988-04-21 1988-04-21 Sampling signal generator

Country Status (1)

Country Link
JP (1) JPH01269121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03148778A (en) * 1989-11-06 1991-06-25 Alps Electric Co Ltd Method and device for compressing digital signal group

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60244810A (en) * 1984-05-19 1985-12-04 Akihide Harada Memory cassette type data gathering and recording device with automatic interval function

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60244810A (en) * 1984-05-19 1985-12-04 Akihide Harada Memory cassette type data gathering and recording device with automatic interval function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03148778A (en) * 1989-11-06 1991-06-25 Alps Electric Co Ltd Method and device for compressing digital signal group

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