JPS62190963A - Voice transmitting and receiving circuit for regular voice monitor type remote supervisory and controlling equipment - Google Patents
Voice transmitting and receiving circuit for regular voice monitor type remote supervisory and controlling equipmentInfo
- Publication number
- JPS62190963A JPS62190963A JP3192186A JP3192186A JPS62190963A JP S62190963 A JPS62190963 A JP S62190963A JP 3192186 A JP3192186 A JP 3192186A JP 3192186 A JP3192186 A JP 3192186A JP S62190963 A JPS62190963 A JP S62190963A
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- voice
- reception
- transmission
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- information
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- 230000005540 biological transmission Effects 0.000 claims abstract description 66
- 238000012544 monitoring process Methods 0.000 claims description 40
- 238000010586 diagram Methods 0.000 description 9
- 230000005236 sound signal Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は遠方監視制御装置に関するもので特に常時音声
モニタ形遠方監視制御装置における音声送受信回路に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a remote monitoring and control device, and particularly to a voice transmitting and receiving circuit in a constant voice monitoring type remote monitoring and controlling device.
（従来の技術）
従来、このような分野の技術としては一般的に第２図に
示す構成のものが用いられていた。(Prior Art) Conventionally, as a technology in this field, a structure shown in FIG. 2 has generally been used.
以下、その構成を図を用いて説明する。The configuration will be explained below using figures.
第２図は従来の常時音声モニタ形遠方監視制御装置の構
成図である。FIG. 2 is a configuration diagram of a conventional continuous voice monitor type remote monitoring and control device.
第２図において１，１ａは情報送受信制御器、２．２ａ
はＦＳ変調器、３，３ａはＦｓ復調器、５．５ａは帯域
ろ波器、６，６ａは帯域ろ波器、７．７ａはハイブリッ
ドトランス、８ ＊ ８ ａｉｄ：スピーカ、ｌＯ，１
０ａはハイブリッドトランス、１１ 、ｌｌｈはマイク
ロフォン、１５．１５ａは低域ろ波器、２０は遠方監視
制御局、２０＆は被遠方監視制御局、２１は伝送路であ
る。In Fig. 2, 1 and 1a are information transmission/reception controllers, 2.2a
is FS modulator, 3, 3a is Fs demodulator, 5.5a is bandpass filter, 6, 6a is bandpass filter, 7.7a is hybrid transformer, 8 * 8 aid: speaker, lO, 1
0a is a hybrid transformer, 11 and llh are microphones, 15.15a are low-pass filters, 20 is a remote monitoring and control station, 20& is a remote monitoring and controlling station, and 21 is a transmission line.
従来の常時音声モニタ形遠方監視制御装置は第２図に示
すごとく、遠方監視制御局２０と、被遠方監視制御局２
０ａとから構成され、両局は伝送路２１で結ばれている
。As shown in FIG. 2, the conventional continuous voice monitor type remote monitoring and control device includes a remote monitoring and control station 20 and a remote monitoring and control station 2.
0a, and both stations are connected by a transmission path 21.
伝送路２１は例えばＮＴＴ回線又は自営線の回線である
。The transmission line 21 is, for example, an NTT line or a private line.
遠方監視制御局２０と被遠方監視制御局２０ａは両局と
も情報の送受信を制御する情報送受信制御器１．ｌａと
、情報の送受信を行なうＦＳＳ変調器？＃、２ａ％ＦＳ
復調器３，３＆、帯域ろ波器５ ＋ ５ ａ ＋ ６ｅ
６’よりなる情報送受信回路と、スピーカｇ、８ａ、
マイクロフォン１１ 、１１ ａ。Both the remote monitoring and control station 20 and the remote monitoring and control station 20a are equipped with an information transmission/reception controller 1. la and the FSS modulator that sends and receives information? #, 2a%FS
Demodulator 3, 3&, bandpass filter 5 + 5a + 6e
an information transmitting/receiving circuit consisting of 6', speakers g, 8a,
Microphone 11, 11a.
ハイブリッドトランス１０．１０ｍ及び低域ろ波器１５
，１５＆よりなる音声送受信回路とをノ・イブリッドト
ランス７．７ａに接続し、ノ・イブリッドトランス７．
７ａ間を伝送路２１で結ぶ構成である。Hybrid transformer 10.10m and low pass filter 15
, 15& is connected to the no-hybrid transformer 7.7a, and the no-hybrid transformer 7.
7a are connected by a transmission line 21.
第３図は、第２図の遠方監視制御装置の周波数帯域分割
図の一例で、伝送路２１の周波数帯域０、３ ｋＨｚ〜
３．４ ｋＨｚの範囲において音声は低域ろ波器７５．
Ｚ５ａにより２ ｋＨｚ以下の帯域を使用し、情報伝送
用のＦＳ信号は２ ｋＨｚ以上の帯域を使用して同時送
受信を行うようになっている。FIG. 3 is an example of a frequency band division diagram of the remote monitoring and control device shown in FIG.
In the 3.4 kHz range, audio is filtered through a low-pass filter 75.
Z5a uses a band of 2 kHz or less, and FS signals for information transmission use a band of 2 kHz or more for simultaneous transmission and reception.
（発明が解決しようとする問題点）
しかしながら、第２図に示した構成の従来の装置では周
波数帯域を分割しているため、音声の高域成分が除かれ
通話品質が低下すると云う問題点があった。又、ハイブ
リッド回路の不整合或いは情報送信回路内でのクロスト
ーク等によシ、ＦＳ信号がスピーカに漏れ、耳障りであ
ると云う問題がありた。(Problems to be Solved by the Invention) However, since the conventional device having the configuration shown in Fig. 2 divides the frequency band, there is a problem in that the high frequency components of the voice are removed and the quality of the call deteriorates. there were. Furthermore, due to mismatching of the hybrid circuit or crosstalk within the information transmission circuit, there is a problem in that the FS signal leaks to the speaker, resulting in harshness.
この発明は第２図に示したような従来の装置における前
記の問題点を除去し、通話品質の優れた装置を提供する
ことを目的とする。It is an object of the present invention to eliminate the above-mentioned problems in the conventional device as shown in FIG. 2 and to provide a device with excellent speech quality.
（問題点を解決するための手段）
この発明は情報と音声の送受信回路を有する遠方監視制
御局と被遠方監視制御局とからなる常時音声モニタ形遠
方監視制御装置において、前記問題点な解決するために
伝送周波数帯域な音声と情報とに分割せずに、音声送受
信回路の周波数帯域を拡大することによって通話品質の
向上をはかると共に、情報信号は制御信号とデータ信号
で構成し、情報送受信制御器に連動する音声送受信回路
シを設ける。(Means for Solving the Problems) The present invention solves the above-mentioned problems in a constant voice monitoring type remote monitoring and control device consisting of a remote monitoring and control station having an information and voice transmitting/receiving circuit and a remote monitoring and controlling station. Therefore, the communication quality is improved by expanding the frequency band of the voice transmitting and receiving circuit without dividing the transmission frequency band into voice and information.In addition, the information signal is composed of a control signal and a data signal, and information transmission and reception control is performed. An audio transmitting/receiving circuit linked to the device is provided.
音声送受信回路の周波数帯域拡大に伴い情報信号が音声
受信回路に混入し、スピーカを鳴音させることになるが
情報送受信中はデータに先行する制御信号によって、音
声送受信制御器を制御して音声受信回路のスピーカをミ
ュートする。As the frequency band of the audio transmitting/receiving circuit expands, information signals will mix into the audio receiving circuit and cause the speaker to make a sound, but during information transmission/reception, the audio transmitting/receiving controller is controlled by the control signal that precedes the data and audio reception is performed. Mute the circuit speaker.
しかし、音声送受信制御器が動作完了し、スピーカがミ
ュートされる迄の量制御信号によってスピーカが鳴音す
るのを防止するためスピーカ入力側に制御信号周波数を
除去する狭帯域消去ろ波器を前置する。又情報送信中は
音声送受信制御器によりマイクロフォン出力は音声遅延
器を経由するように切替えられ情報送信中に音声の送信
を行った場合には、音声を一定時間遅延させて送出する
。However, in order to prevent the speaker from producing sound due to the volume control signal until the audio transmitter/receiver controller completes its operation and the speaker is muted, a narrowband cancellation filter is installed on the speaker input side to remove the control signal frequency. place Also, during information transmission, the microphone output is switched by the audio transmission/reception controller to pass through the audio delay device, and if audio is transmitted during information transmission, the audio is delayed for a certain period of time before being transmitted.
うにして、受信データの誤り発生を防ぐとともに明瞭な
音声通話が可能となるよう構成した。This structure prevents errors in received data and enables clear voice communication.
（作用）
この発明によれば、以上述べたように常時音声モニタ形
遠方監視制御装置における音声送受信回路を構成するこ
とによって、情報送受信中に音声送受信回路のスピーカ
が情報信号によシ鳴音することなく、又、情報送信中に
音声による通話を行っても、音声信号は、情報送受信が
終了する迄遅延して送出されるので情報信号に音声が重
畳することなく、前記問題点を除去することができる。(Function) According to the present invention, by configuring the audio transmitting/receiving circuit in the constant audio monitoring type remote monitoring and control device as described above, the speaker of the audio transmitting/receiving circuit makes a noise due to the information signal during information transmission/reception. In addition, even if a voice call is made during information transmission, the voice signal is delayed until the information transmission and reception is completed, so the voice is not superimposed on the information signal, eliminating the above problem. be able to.
（実施例） 第１図はこの発明の１実施例を示す構成図である。(Example) FIG. 1 is a block diagram showing one embodiment of the present invention.
第１図において２０は遠方監視制御局、２０ａは被遠方
監視制御局で、伝送路２１により接続されて運用される
。なお両局の機器構成は同一である。すなわち１，１３
は情報送受信制御器、２，２ａはＦＳ変調器、３，３ａ
はＦＳ復調器、４，４ａ域ろ波器、７，７ａ及び１０．
ＩＯａはノーイブリッドトランス、８，８ａはスピーカ
、９，９ａは狭帯域消去ろ波器、ｌｌ、Ｉｌａはマイク
ロフォン、１２，１２ａは（送信）音声遅延器、１３゜
１３ａは（送信）音声切替器である。In FIG. 1, 20 is a remote monitoring and control station, and 20a is a remote monitoring and control station, which are connected by a transmission line 21 and operated. The equipment configurations of both stations are the same. i.e. 1, 13
is an information transmission/reception controller, 2 and 2a are FS modulators, and 3 and 3a are
are FS demodulator, 4, 4a band filter, 7, 7a and 10.
IOa is a no-brid transformer, 8 and 8a are speakers, 9 and 9a are narrowband cancellation filters, ll and Ila are microphones, 12 and 12a are (transmission) audio delay devices, 13° and 13a are (transmission) audio switching devices It is.
情報送受信制御器１．ｌａはＦＳ変調器２，２ａ、ＦＳ
復調器３，３ａ及び音声送受信制御器４，４ａに接続さ
れている。ＦＳ変調器２，２ａは帯域ろ波器５，５ａに
、又、ＦＳ復調器３，３ａは帯域ろ波器６，６ｔＬに接
続されハイブリッドトランス７．７ａを介して伝送路２
１に接続される。Information transmission/reception controller 1. la is FS modulator 2, 2a, FS
It is connected to demodulators 3, 3a and audio transmission/reception controllers 4, 4a. The FS modulators 2, 2a are connected to bandpass filters 5, 5a, and the FS demodulators 3, 3a are connected to bandpass filters 6, 6tL, and the transmission line 2 is connected via a hybrid transformer 7.7a.
Connected to 1.
スピーカ８，８ａは狭帯域消去ろ波器９，９ａを介して
ハイブリッドトランス１０，１０ｈに接続される。Speakers 8, 8a are connected to hybrid transformers 10, 10h via narrow band cancellation filters 9, 9a.
マイクロフォン１１．Ｊｌｍは音声切替器１３゜１３ａ
の入力側の一端と、音声遅延器１２．１２ｈの入力側に
接続され、音声遅延器１２．１２＊の出力側は音声切替
器１３．１３＆の入力側の他端に接続されており、音声
切替器１３，１３ａの出力端はハイブリッドトランスｉ
ｏ 、 ｚ ｏ ａＫ後接続れる。ハイブリッドトラ
ンス１ｏ、ｒｏｈはノーイブリッドトランス７．７ａを
介して、伝送路２１に接続される。Microphone 11. Jlm is audio switch 13゜13a
One end of the input side of the audio delay device 12.12h is connected to the input side of the audio delay device 12.12h, and the output side of the audio delay device 12.12* is connected to the other end of the input side of the audio switching device 13.13&. The output end of the switch 13, 13a is the hybrid transformer i.
o, z o Connected after aK. The hybrid transformers 1o and roh are connected to the transmission line 21 via a no-brid transformer 7.7a.
音声送受信制御器４，４ａはスピーカ８，８ａの入力回
路、マイクロフォン１１．１１８の出力回路及び音声切
替器１３の１動回路に接続されている。The audio transmission/reception controllers 4 and 4a are connected to the input circuits of the speakers 8 and 8a, the output circuits of the microphones 11 and 118, and the one-way circuit of the audio switch 13.
第４図はこの発明の１実施例の周波数関係図である。第
４図において音声信号は伝送路２ノの周波数帯域０．３
ｋＨｚ〜３．４ ｋＨｚの全範囲を使用して伝送され
、情報信号の伝送もこの範囲内で行われる。FIG. 4 is a frequency relationship diagram of one embodiment of the present invention. In Figure 4, the audio signal has a frequency band of 0.3 on transmission line 2.
The entire range from kHz to 3.4 kHz is used for transmission, and the transmission of information signals also takes place within this range.
遠方監視制御局２０と被遠方監視制御局２０ｈの間で音
声による送受信を行っていない時には両局の情報送受信
制御器ｌ及び１ａの管理の下に、断続的に情報の送受信
を行っている。この発明においては情報の送信（はＦＳ
波を使用し、情報送受信制御器１又は１ａに印加された
データを送信するに当り、データに先行してＦＳ波の一
方の周波敷石又はｆ２を一定時間送出する。受信側では
これを検出して音声送受信制御器４又は４ａを制御する
。When voice transmission and reception is not performed between the remote monitoring and control station 20 and the remote monitoring and control station 20h, information is transmitted and received intermittently under the control of the information transmission and reception controllers 1 and 1a of both stations. In this invention, information transmission (FS
When transmitting data applied to the information transmitting/receiving controller 1 or 1a using a wave, one frequency flag or f2 of the FS wave is transmitted for a certain period of time in advance of the data. The receiving side detects this and controls the audio transmission/reception controller 4 or 4a.
一例として、送信側が遠方監視制御局２０の場合につい
て説明する。As an example, a case where the transmitting side is the remote monitoring control station 20 will be described.
遠方監視制御局２０が送信すると、受信側の被遠方監視
制御局２０ａの情報送受信制御器７Ｂは先づ制御信号ｆ
１又はｆ２を検出して、音声送受信制御器４ａを制御す
る。音声送受信制御器４ａは、スピーカ８ａの入力回路
をミュート制御すると共に音声切替器１３ａを駆動して
マイクロフォン１１ａの出力が（音声）遅延器１２ａを
通過するように切替える。以上の制御は情報受信中継続
される。When the remote monitoring and control station 20 transmits the signal, the information transmission/reception controller 7B of the remote monitoring and control station 20a on the receiving side first receives the control signal f.
1 or f2 and controls the audio transmission/reception controller 4a. The audio transmission/reception controller 4a mutes the input circuit of the speaker 8a, drives the audio switch 13a, and switches the output of the microphone 11a to pass through the (audio) delay device 12a. The above control is continued while information is being received.
なお、制御信号ｆｘ又はｆ２が送信されると、受信側の
情報送受信制御器１ｈに加わると同時に、スピーカ８ａ
にも加わり送受信制御器４ａの動作が完了する迄の間鳴
音を発することとなるので、これを防止するため、スピ
ーカ８ａの入力側に制御信号の周波数ｆｌ又はｆ２を除
去する狭帯域消去ろ波器９ａを挿入する。Note that when the control signal fx or f2 is transmitted, it is applied to the information transmission/reception controller 1h on the receiving side, and at the same time, it is applied to the speaker 8a.
In order to prevent this, a narrow band cancellation filter is installed on the input side of the speaker 8a to remove the frequency fl or f2 of the control signal. Insert the waver 9a.
以上によって、情報送信中もＦＳ波の音はスピーカから
聞えない。又、マイクロフォン１１１Ｌは音声切替器よ
って音声遅延器１２ａ側に接続さ遅れて、送信される。As a result of the above, the sound of the FS wave cannot be heard from the speaker even during information transmission. Also, the microphone 111L is connected to the audio delay device 12a side by the audio switching device and is transmitted with a delay.
一方、送信側の遠方監視制御局２０の情報送受信制御器
ｌは情報送信中、音声送受信制御器４を制御してスピー
カ８をミュートし、音声切替器１３を音声遅延器１２側
へ切替える。On the other hand, during information transmission, the information transmission/reception controller 1 of the remote monitoring control station 20 on the transmitting side controls the audio transmission/reception controller 4 to mute the speaker 8 and switch the audio switch 13 to the audio delay device 12 side.
なお、スピーカ８の入力側には制御信号周波数ｆｌ又は
ｆ２を除去する狭帯域ろ波器９が接続されているので、
ハイブリッドトランス７と外部回路との不整合による制
御信号の漏れが音声受信回路に廻シ込んでもスピーカ８
がミ−トされる前に制御信号によってスピーカ８が鳴音
することはない。Note that a narrowband filter 9 that removes the control signal frequency fl or f2 is connected to the input side of the speaker 8.
Even if control signal leakage due to a mismatch between the hybrid transformer 7 and the external circuit enters the audio receiving circuit, the speaker 8
The control signal does not cause the speaker 8 to produce sound before the sound is heard.
又情報送信中に音声を送信するとマイクロフォン１１は
音声遅延器１２に接続されているので音声信号は一定時
間送出（情報の継続時間取−ヒ）だけ遅れて送出される
。従って音声信号が送出される時には情報の送信は終了
層であるので受信側のスピーカ８ａは既にミュートを解
除されているので音声を受信できる。Furthermore, when audio is transmitted during information transmission, since the microphone 11 is connected to the audio delay device 12, the audio signal is transmitted with a delay of a certain period of time (the duration of the information). Therefore, when the audio signal is sent out, since the information transmission is in the termination layer, the receiving side speaker 8a has already been unmuted and can receive the audio.
なお音声遅延れ入力された音声信号がすべて送出される
迄マイクロフォン１１に接続されている。Note that the microphone 11 is connected to the microphone 11 until all of the input audio signals are sent out.
第５図はこの発明の一実施例の情報送受信時の動作タイ
ムチャートである。FIG. 5 is an operation time chart when transmitting and receiving information according to an embodiment of the present invention.
次に遠方監視制御局２０と被遠方監視制御局２０ｈの間
で音声通信を行っているときは、両局の音声送受信制御
器４又は４＆によって、自局の情報送受信制御器１又は
ｌｈが制御されて、情報の自動送信は禁止されるが音声
送受信の切れ目には情報の自動送受信が行われる。Next, when voice communication is performed between the remote monitoring and control station 20 and the remote monitoring and control station 20h, the information sending and receiving controller 1 or lh of the own station is controlled by the audio sending and receiving controller 4 or 4& of both stations. Although automatic transmission of information is prohibited, automatic transmission and reception of information is performed at the break between voice transmission and reception.
第６図はこの発明の一実施例の音声送受信時の動作タイ
ムチャートである。FIG. 6 is an operation time chart during voice transmission and reception according to an embodiment of the present invention.
（発明の効果）
以上説明したように常時音声モニタ形遠方監視制御装置
において情報送信時にＦＳ信号音が音声送受信系のスピ
ーカから聞えることを完全に防止し明瞭な音゛声通信を
可能にすると共に、情報送受信中でも情報通信を妨害す
ることなく常時、音声通信を可能とする有効な手段を提
供することができる効果がある。(Effects of the Invention) As explained above, in a constant voice monitor type remote monitoring and control device, it is possible to completely prevent the FS signal sound from being heard from the speaker of the voice transmitting/receiving system when transmitting information, and to enable clear voice communication. This has the effect of providing an effective means that enables voice communication at all times without interfering with information communication even during information transmission and reception.
第１図はこの発明の一実施例の構成図、第２図は従−来
の常時音声モニタ形遠方監視制御装置の構成図、
第３図は第２図の装置の周波数帯域分割の一例を示す図
、
第４図はこの発明の一実施例の周波数 図、第５図は
この発明の一実施例の情報送受信時の動作タイムチャー
ト、
第６図はこの発明の一実施例の音声送受信時の動作タイ
ムチャートである。
１．１ａ・・・情報送受信制御器、２，２ａ・・・ＦＳ
変調器、３．、？ａ・・・ＦＳ復調器、４，４ａ・・・
音声送受信制御器、５．５ｇ、６．６ｍ・・・帯域ろ波
器、７．７ａ・・・ハイブリッドトランス、８，８ａ・
・・スピーカ、９，９１Ｌ・・・狭帯域消去ろ波器、Ｚ
（７゜１０ａ・・・ハイブリッドトランス、１１．ＩＺ
ａ・・・マイクロフォン、１２，１２１Ｌ・・・音声遅
延器、１３．１３ｈ・・・音声切替器、２０−・・遠方
監視制御局、２０ａ・・・被遠方監視制御局、２１・・
・伝送路。
第２図の遠方監視制御装置の周波数帯域分割口笛３図
この発明の一実施例の周波数関係図
この発明の一実施例の情報送受信時の動作タイムチャー
ト篇 ５ 図Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a block diagram of a conventional continuous voice monitor type remote monitoring and control device, and Fig. 3 is an example of frequency band division of the device shown in Fig. 2. 4 is a frequency diagram of an embodiment of this invention, FIG. 5 is an operation time chart of an embodiment of this invention during information transmission/reception, and FIG. 6 is a frequency diagram of an embodiment of this invention during voice transmission/reception. This is an operation time chart. 1.1a...information transmission/reception controller, 2,2a...FS
modulator, 3. ,? a...FS demodulator, 4,4a...
Audio transmission/reception controller, 5.5g, 6.6m...Band filter, 7.7a...Hybrid transformer, 8,8a...
...Speaker, 9,91L...Narrowband cancellation filter, Z
(7゜10a...Hybrid transformer, 11.IZ
a...Microphone, 12,121L...Audio delay device, 13.13h...Audio switching device, 20-...Distant monitoring and control station, 20a...Distant monitoring and control station, 21...
・Transmission line. Figure 2 Frequency band division whistle of the remote monitoring and control device 3 Figure Frequency relationship diagram of one embodiment of this invention Operation time chart during information transmission and reception of one embodiment of this invention Figure 5
Claims (3)
と被遠方監視制御局とからなる音声モニタ形遠方監視制
御装置における音声送受信回路において、情報送受信制
御器と連動する音声送受信制御器によって情報送受信中
は音声受信回路をミュートして、情報信号がスピーカを
鳴音することを防止すると共に情報送受信中に音声通信
を可能とするため音声遅延器を設けたことを特徴とする
常時音声モニタ形遠方監視制御装置の音声送受信回路。(1) In the audio transmitting/receiving circuit of a voice monitor type remote monitoring and control device consisting of a remote monitoring and control station having an information and audio transmitting/receiving circuit and a remote monitoring and controlling station, information is transmitted by an audio transmitting/receiving controller that works in conjunction with the information transmitting/receiving controller. A constant voice monitor type characterized by muting the voice receiving circuit during transmission and reception to prevent the information signal from making the speaker ring, and also equipped with a voice delay device to enable voice communication during the transmission and reception of information. Audio transmitting and receiving circuit for remote monitoring and control equipment.
止する狭帯域消去ろ波器を前置した特許請求範囲第１項
記載の常時音声モニタ形遠方監視制御装置の音声送受信
回路。(2) The audio transmitting/receiving circuit for a constant audio monitoring type remote monitoring and control device according to claim 1, wherein the audio receiving circuit is provided with a narrowband cancellation filter for preventing mixing of information signal frequencies.
の継続時間とした特許請求範囲第１項記載の常時音声モ
ニタ形遠方監視制御装置の音声送受信回路。(3) The audio transmitting/receiving circuit for a constant audio monitor type remote monitoring and control device according to claim 1, wherein the delay time of the audio delay device is at least the duration of the information signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3192186A JPS62190963A (en) | 1986-02-18 | 1986-02-18 | Voice transmitting and receiving circuit for regular voice monitor type remote supervisory and controlling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3192186A JPS62190963A (en) | 1986-02-18 | 1986-02-18 | Voice transmitting and receiving circuit for regular voice monitor type remote supervisory and controlling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62190963A true JPS62190963A (en) | 1987-08-21 |
Family
ID=12344438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3192186A Pending JPS62190963A (en) | 1986-02-18 | 1986-02-18 | Voice transmitting and receiving circuit for regular voice monitor type remote supervisory and controlling equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62190963A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108690U (en) * | 1988-01-13 | 1989-07-24 | ||
| JPH06105002A (en) * | 1992-09-21 | 1994-04-15 | Miura Co Ltd | Data communication system for managing thermal equipment such as boiler |
-
1986
- 1986-02-18 JP JP3192186A patent/JPS62190963A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108690U (en) * | 1988-01-13 | 1989-07-24 | ||
| JPH06105002A (en) * | 1992-09-21 | 1994-04-15 | Miura Co Ltd | Data communication system for managing thermal equipment such as boiler |
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