JPS58115955A - Data collecting system - Google Patents
Data collecting systemInfo
- Publication number
- JPS58115955A JPS58115955A JP56214339A JP21433981A JPS58115955A JP S58115955 A JPS58115955 A JP S58115955A JP 56214339 A JP56214339 A JP 56214339A JP 21433981 A JP21433981 A JP 21433981A JP S58115955 A JPS58115955 A JP S58115955A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- data
- slave
- slave stations
- master station
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/403—Bus networks with centralised control, e.g. polling
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
局のデータを親局に送信し，データを収集するデータ収
集方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data collection method for transmitting station data to a master station and collecting data.
従来この種のデータ収集方式では，データを親局に伝送
するために子局ごとに特有の送信周波数を設定し．周波
数帯域が重なることのない周波数分割多重方式を採用し
ている。Conventionally, in this type of data collection method, a unique transmission frequency is set for each slave station in order to transmit data to the master station. It uses frequency division multiplexing, which prevents frequency bands from overlapping.
従って，子局ごとに特有の沢波器を設け，親局では子局
と同数のＰ波器及び復調器を設ける必要があシ，構成が
複雑になるという欠点があった。Therefore, it is necessary to provide a unique wave wave generator for each slave station, and the master station must have the same number of P wave generators and demodulators as the slave stations, resulting in a complicated configuration.
またケーブルでの伝送損失の増大を避けるために。Also to avoid increasing transmission loss in the cable.
おいて周波数帯域を子局ごとに分離する非常に高度な沢
波器を必要とする欠点があった。However, this system had the disadvantage of requiring a very sophisticated wave generator that separates the frequency band for each slave station.
本発明の目的は上記欠点を除去したデータ収集方式を提
供することにある。An object of the present invention is to provide a data collection method that eliminates the above-mentioned drawbacks.
本発明によれば，複数の子局のデータを共通の１対のケ
ーブルを介して親局に送信して該データＣ２ ）
を果状するデータ集成方式において、前記各子局に前記
親局から選択信号を受ると当該子局に割シ当てられた時
間前記データで変調した変調信号を前記親局に送信する
ように制御する制御手段を設け、前記親局に前記子局の
データが十分復調できるサンプリング周波数で前記各子
局を順次選択する信号を前記選択信号として送出する選
択信号発生手段と、前記各子局から順次送られてくる変
調信号を受信し復調する共通の復調手段と、前記選択信
号に同期して前記子局の数と同数のダートを順次開くこ
とによシ前些復調された信号を分離する信号分離手段と
を設けて成ることを特徴とするデータ収集方式が得られ
る。According to the present invention, in a data aggregation method in which data from a plurality of slave stations is transmitted to a master station via a common pair of cables to output the data C2), the data from the master station to each slave station is transmitted to the master station. A control means is provided for controlling a modulation signal modulated with the data to be transmitted to the master station for a time allocated to the slave station when receiving a selection signal, and the master station has sufficient data of the slave station. selection signal generating means for transmitting, as the selection signal, a signal for sequentially selecting each of the slave stations at a sampling frequency that can be demodulated; and a common demodulation means for receiving and demodulating modulated signals sequentially sent from each of the slave stations; A data collection method is provided, comprising: signal separation means for separating a pre-demodulated signal by sequentially opening darts of the same number as the number of slave stations in synchronization with the selection signal. It will be done.
以下本発明について図面を参照して詳細に説明する。The present invention will be described in detail below with reference to the drawings.
第１図は子局を２局とした場合の本発明による一実施例
の構成を示すブロック図で、１０は親局。FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention when there are two slave stations, and 10 is a master station.
１１．１゜Ｆ、、Ｃゎイゎ□０．。、□２□ゎアあう。11.1°F,,Cゎiiゎ□0. . , □2□Ah.
１０と第１子局１１と第２子局１２は共通の１対のケー
ブル１３によシ接続され、第１子局１１と第２子局１２
の電源は親局１０から直流ａとして親局側信号分離器１
４を介して供給されている。10, the first slave station 11, and the second slave station 12 are connected by a common pair of cables 13, and the first slave station 11 and the second slave station 12
The power source is supplied from the master station 10 as DC a to the master station side signal separator 1.
4.
まず、サンプリング周波数発生回路１５より発生される
パルス波ｌは、子局のデータｂ、ｃを十分復調できる周
波数に選定され、ＦＳ信号発生回路１６に送られ、ＦＳ
信号りとなって親局側信号分離器１４よシ共通の１対の
ケーブル１３に送出される。First, the pulse wave l generated by the sampling frequency generation circuit 15 is selected to have a frequency that can sufficiently demodulate the data b and c of the slave station, and is sent to the FS signal generation circuit 16.
The signal is transmitted from the master station side signal separator 14 to a pair of common cables 13.
第１子局１１あるいは第２子局１２では、送ら１９ある
いはＦＳ第２復調器２０で各々の子局が選択され、サン
プリングされるタイミングパルスｄあるいは同ｅｆ作成
する。子局のデータｂ、ｃで変調する変調器２１あるい
は変調器２２は（本実施例では振幅変調によシ説明する
）前記タイミングパルスｄあるいは同ｅによジオンオフ
を繰シ返し、変調信号ｆあるいは変調信号ｇを得、前記
子局側信号分離器１７あるいは同１８を介して親局１０
に向けて１対のケーブル１３に送出される。In the first slave station 11 or the second slave station 12, the transmitter 19 or the second FS demodulator 20 selects each slave station and creates a timing pulse d or ef to be sampled. The modulator 21 or modulator 22 that modulates data b and c from the slave station (in this embodiment, amplitude modulation is used) repeats the on-off operation using the timing pulse d or e, and modulates the modulation signal f or The modulated signal g is obtained and sent to the master station 10 via the slave station side signal separator 17 or 18.
The signal is sent out to a pair of cables 13 toward the destination.
この変調信号ｆあるいは同ｇの周波数はＦＳ信号りの周
波数よシも高く（または低く）選ばれ親局ｌＯの親局側
信号分離器１４での分離を容易にする。The frequency of this modulation signal f or g is selected to be higher (or lower) than the frequency of the FS signal to facilitate separation in the master station signal separator 14 of the master station 10.
第１子局１１と第２子局１２によ多出力され１対のケー
ブル１３を通して親局１０で受信された変調信号ｊは復
調器２３によシ復調される。信号分離ケ９−ト回路２４
ではサンシリング周波数発生回路１５の・ぐルス波ｉに
同期して第１子局１１の信号にと第２子局１２の信号ｔ
を分離し、低域ｒ波器２５および２６全通して復調デー
タｍおよび彼調データｎｉそれぞれ得る。The modulated signal j which is output to the first slave station 11 and the second slave station 12 and received by the master station 10 through a pair of cables 13 is demodulated by the demodulator 23. Signal separation gate circuit 24
Then, in synchronization with the wave i of the frequency generating circuit 15, the signal t of the first slave station 11 and the signal t of the second slave station 12 are
is separated and passed through the low-frequency r wave generators 25 and 26 to obtain demodulated data m and demodulated data ni, respectively.
上記実施例では子局が２局の場合について述べたが、一
般にＮ局の場合、サンプリング周波数を子局のデータの
最大周波数の２Ｎ信以上にすれば子局のデータを再生で
きるのは言うまでもない。In the above embodiment, the case where there are two slave stations has been described, but it goes without saying that in the case of N stations, the slave station data can generally be reproduced by setting the sampling frequency to 2N times or more of the maximum frequency of the slave station data. .
以上の説明よシ明らかなように２本発明によれば、親局
のサンプリング周期で複数の子局を順次選択することに
よシ、子局を同一規格で製作でき。As is clear from the above explanation, according to the present invention, by sequentially selecting a plurality of slave stations at the sampling period of the master station, slave stations can be manufactured to the same standard.
親局側および子局側の信号分離器も簡単に実現でき３親
局の小型化が可能であるだけでなく、所要周波数帯域も
狭くてすみ、得られる効果は大きい。The signal separators on the master station side and the slave station side can be easily realized, and not only can the three master stations be downsized, but the required frequency band can also be narrowed, and the effects obtained are significant.
第１図は本発明による一実施例の構成を示すブロック図
、第２図は本実施例の動作を説明するためのタイムチャ
ートである。
記号の説明＝ｌＯは親局、１１は第１子局。
１２は第２子局、１３は１対のケーブル、１４は親局側
信号分離器、１５はサンプリング周波数発生回路、１６
はＦＳ信号発生回路、１７．１８は子局側信号分離器、
１９はＦＳ第１復調器、２０はＦＳ第２復調器、２１．
２２は変調器、２３は復調器、２４は信号分離ダート回
路、２５．２６は低域Ｐ波器をそれぞれあられしている
。FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention, and FIG. 2 is a time chart for explaining the operation of this embodiment. Explanation of symbols = IO is the master station, 11 is the first slave station. 12 is a second slave station, 13 is a pair of cables, 14 is a master station side signal separator, 15 is a sampling frequency generation circuit, 16
is the FS signal generation circuit, 17.18 is the slave station side signal separator,
19 is a first FS demodulator, 20 is a second FS demodulator, 21.
22 is a modulator, 23 is a demodulator, 24 is a signal separation dart circuit, and 25 and 26 are low-frequency P wave generators, respectively.
Claims (1)
して親局に送信して該データを果状するデータ果状方式
において、前記各子局に前記親局から選択信号を受ける
と当該子局に割シ当てられた時間前記データで変調した
変調信号を前記親局に送信するように制御する制御手段
を設け、前記親局に前記子局のデータが十分復調できる
サンプリング周波数で前記各子局を順次選択する信号を
前記選択信号として送出する選択信号発生手段と。 前記各子局から順次送られてくる変調信号を受信し復調
する共通の復調手段と、前記選択信号に同期して前記子
局の数と同数のダートを順次開くことによシ前記復調さ
れた信号を分離する信号分離手段とを設けて成ることを
特徴とするデータ収集方式。 以下余白 （１）[Scope of Claims] 1. In a data output method in which data from a plurality of slave stations is transmitted to a master station via a common pair of cables and the data is output, each of the slave stations is provided with the data from the master station. control means is provided for controlling the slave station to send a modulated signal modulated with the data to the master station for a time allocated to the slave station when receiving a selection signal from the slave station; selection signal generating means for transmitting, as the selection signal, a signal for sequentially selecting each of the slave stations at a sampling frequency that can be demodulated; A common demodulating means receives and demodulates the modulated signals sequentially sent from each of the slave stations, and the demodulated signals are sequentially opened as many darts as the number of slave stations in synchronization with the selection signal. A data collection method characterized by comprising a signal separation means for separating signals. Below margin (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56214339A JPS58115955A (en) | 1981-12-28 | 1981-12-28 | Data collecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56214339A JPS58115955A (en) | 1981-12-28 | 1981-12-28 | Data collecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58115955A true JPS58115955A (en) | 1983-07-09 |
Family
ID=16654118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56214339A Pending JPS58115955A (en) | 1981-12-28 | 1981-12-28 | Data collecting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58115955A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008054547A (en) * | 2006-08-30 | 2008-03-13 | Hokko Corp | Shading filter |
-
1981
- 1981-12-28 JP JP56214339A patent/JPS58115955A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008054547A (en) * | 2006-08-30 | 2008-03-13 | Hokko Corp | Shading filter |
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