JPS60254843A - Analog transmission system of key switch - Google Patents

Analog transmission system of key switch

Info

Publication number
JPS60254843A
JPS60254843A JP10946584A JP10946584A JPS60254843A JP S60254843 A JPS60254843 A JP S60254843A JP 10946584 A JP10946584 A JP 10946584A JP 10946584 A JP10946584 A JP 10946584A JP S60254843 A JPS60254843 A JP S60254843A
Authority
JP
Japan
Prior art keywords
key
key switch
converter
switch
switches
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
JP10946584A
Other languages
Japanese (ja)
Inventor
Masayuki Ozawa
正幸 小沢
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10946584A priority Critical patent/JPS60254843A/en
Publication of JPS60254843A publication Critical patent/JPS60254843A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)

Abstract

PURPOSE:To decide on information of a relatively small number of key switches at distance with economical constitution by connecting the key switches to a constant voltage through corresponding different resistances and operating the key switches. CONSTITUTION:The key switches SW1-SWn in a key switch box are supplied with the constant voltage V through resistances R1-Rn with a different value by using a cable from a reception part, and key switch outputs are transmitted through another cable. The reception part is equipped with an A/D converter 1 and a resistance R and the converter 1 normally converts an input voltage VIN from analog to digital. Now, when an SWi (i=1-n) in pressed, an input voltage VINi=VXR/(R+Ri) is inputted to the converter 1 and a voltage corresponding to the key switch is digitized by the converter 1. Therefore, it is recognized from the which SW is turned on.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は遠隔地におかれたキーをオンしてキー信号を伝
送し、どのキーがオンされたかを認識するためのキース
イッチ情報のアナログ伝送方式に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention turns on a key located at a remote location, transmits a key signal, and provides analog key switch information for recognizing which key has been turned on. This relates to transmission methods.

〔従来技術〕[Prior art]

このように遠隔地のキースイッチのオン情報を送信する
ために従来第２図のごとき方式が用いられている。これ
はマイコンを使用するものであって、キースイッチＳ　
ＩＩ　、Ｓ　１２　＋　３１３　＋’−’＋　８２１　
＋８２□、・−５ｓ３＋＋３３□、−等をマトリックス
状に配列せしめ各スイッチの各列および各行を１チツプ
マイコンに接続するとともに各スイッチの各行を一定の
抵抗を介して電源Ｖに接続し、各行をＤ＋入力によりス
キャンし、スイッチの中の１つがオンされるとそのスイ
ッチは電源に接続されて電圧を発生し、その発生電圧に
対応するスイッチをマイコン１１において認識してこれ
をディジタル信号としてキーデータ受信部に伝送するも
のであった。Conventionally, a method as shown in FIG. 2 has been used to transmit the ON information of a key switch at a remote location. This uses a microcomputer, and the key switch S
II, S 12 + 313 +'-'+ 821
+82□, -5s3++33□, -, etc. are arranged in a matrix, each column and each row of each switch is connected to one chip microcomputer, and each row of each switch is connected to a power supply V through a certain resistance, and each row is Scanning is performed by the D+ input, and when one of the switches is turned on, that switch is connected to the power supply and generates a voltage.The microcomputer 11 recognizes the switch corresponding to the generated voltage and converts this into a digital signal as key data. It was intended to be transmitted to the receiving section.

かかる従来の方式はキースイッチの数が多くなればなる
ほどマイコン１１の使用が効果を発揮するものである。In such a conventional system, the use of the microcomputer 11 becomes more effective as the number of key switches increases.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

第２図のごとき方式をキースイッチの数の比較的少ない
遠隔地よりのキー信号に適用することは非常に不経済で
ある。何となれば少ないキースイッチに対してマイコン
を使用することは不経済であり、且つ伝送ケーブルを３
本必要とするためケーブルによるコストが増加し、且つ
遠隔地においてマイコンを使用したごとき複雑な装置を
設置することは保守の面においても好ましくない。It is very uneconomical to apply the system shown in FIG. 2 to key signals from a remote location where the number of key switches is relatively small. After all, it is uneconomical to use a microcontroller for a small number of key switches, and the transmission cable requires three
This requirement increases the cost of cables, and it is also undesirable from the viewpoint of maintenance to install a complicated device using a microcomputer in a remote location.

〔問題を解決するための手段〕[Means to solve the problem]

本発明は、上記問題点を解消した簡易なキースイッチの
アナログ伝送方式を提供するもので、その手段は遠隔地
におかれたキースイッチを押下してキー信号を伝送する
キー信号の伝送方式において、複数個の前記キースイッ
チを該キースイッチに対応する異なる抵抗を介して一定
電源に接続し、前記キスイッチを押下した場合該スイッ
チに対応した異なる電圧を発生せしめ、該電圧をケーブ
ルにより伝送し、受信部においてディジタル化し、その
ディジタル化されたデータによりどのキースイッチが押
下されたかを認識することを特徴とするキースイッチの
アナログ伝送方式によってなされる。The present invention provides a simple key switch analog transmission system that solves the above-mentioned problems. , connecting a plurality of the key switches to a constant power source through different resistors corresponding to the key switches, generating different voltages corresponding to the switches when the key switches are pressed, and transmitting the voltages by cables; This is done using an analog key switch transmission method, which is characterized in that the data is digitized in the receiving section and it is possible to recognize which key switch has been pressed based on the digitized data.

〔実施例〕〔Example〕

以下図面を参照して本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.

第１図に本発明の１実施例のブロック図を示す。FIG. 1 shows a block diagram of one embodiment of the present invention.

第１図においてキースイッチボックスにおいてはキース
イッチＳ　Ｗ＋、　Ｓ　Ｗ２．−３　Ｗｎに対してそれ
ぞれ抵抗Ｒ、、Ｒ２＋−Ｒ，が接続され、各抵抗Ｒ＋。In FIG. 1, the key switch box includes key switches SW+, SW2. -3 Resistors R, , R2+-R, are connected to Wn, and each resistor R+.

Ｒ２＋−Ｒ，の値は異なる値を有し重み付けされている
。各抵抗、キースイッチの直列回路には受信部よりケー
ブルを介して一定の電圧があたえられ、キースイッチ出
力は他のケーブルを介して受信部に伝送される。受信部
にはＡ／Ｄコンバータおよび抵抗Ｒをそなえる。The values of R2+-R, have different values and are weighted. A fixed voltage is applied from the receiving section to the series circuit of each resistor and key switch via a cable, and the key switch output is transmitted to the receiving section via another cable. The receiving section is equipped with an A/D converter and a resistor R.

第１図のごとき回路において、キースイッチＳＷＩをオ
ンした場合はＡ／Ｄコンバータに入力する電圧ＶＩＮ＋
は ｖｌＮ＋＝＋ｖ− Ｒ十Ｒ＋ またキースイッチＳＷ２をオンとした場合はというよう
に各スイッチに対応した電圧がＡ／Ｄコンバータ１に入
力される。In the circuit shown in Figure 1, when the key switch SWI is turned on, the voltage VIN+ input to the A/D converter
is vlN+=+v-R0R+ Further, when the key switch SW2 is turned on, voltages corresponding to each switch are inputted to the A/D converter 1 as shown below.

Ａ／Ｄコンバーク１においては常時Ａ／Ｄ変換を行なっ
ている。したがって各キースイッチに対応した電圧はＡ
／Ｄコンバータによりディジタル化してそのデータによ
りどのスイッチがオンされたかを認識する。The A/D converter 1 constantly performs A/D conversion. Therefore, the voltage corresponding to each key switch is A
The data is digitized by a /D converter and it is possible to recognize which switch is turned on based on the data.

〔発明の効果〕〔Effect of the invention〕

以上詳細に説明したように、本発明によればキースイッ
チボックスに配置する部品が抵抗とキースイッチのみで
あり、且つ伝送ケーブルが２本で済むので、比較的少数
のキーボックスを遠隔地に配置してキースイッチ情報を
伝送する方式に適用して本発明の効果は頗る大である。As explained in detail above, according to the present invention, the only parts placed in the key switch box are the resistor and the key switch, and only two transmission cables are required, so a relatively small number of key boxes can be placed in remote locations. The effects of the present invention are particularly significant when applied to a method of transmitting key switch information.

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

第１図は本発明にかかるキースイッチのアナログ伝送方
式の１実施例を示すブロック図、第２図は従来のキース
イッチ情報の伝送方式の１例を示すブロック図である。 図中、Ｓ　Ｗ　ｌ、　Ｓ　Ｗ　２　、−・ＳＷ、ｌはキ
ースイッチ、Ｒ，Ｒ，、Ｒ，、−Ｒ１１は抵抗、＋Ｖは
電源、１はＡ／Ｄコンバータ、をそれぞれ示す。 特許出願人 富士通株式会社 特許出願代理人 弁理士　青　木　朗 弁理士西舘和之 弁理士内田幸男 弁理士　山　口　昭　之FIG. 1 is a block diagram showing an embodiment of a key switch analog transmission system according to the present invention, and FIG. 2 is a block diagram showing an example of a conventional key switch information transmission system. In the figure, S W 1, S W 2 , -SW, l represent a key switch, R, R, , R, , -R11 represent a resistor, +V represents a power supply, and 1 represents an A/D converter, respectively. Patent applicant: Fujitsu Limited Patent application agent: Akira Aoki, patent attorney: Kazuyuki Nishidate, patent attorney: Yukio Uchida, patent attorney: Akira Yamaguchi

Claims (1)

【特許請求の範囲】[Claims] 遠隔地におかれたキースイッチを押下してキー信号を伝
送するキー信号の伝送方式において、複数個の前記キー
スイッチを該キースイッチに対応する異なる抵抗を介し
て一定電源に接続し、前記キースイッチを押下した場合
該スイッチに対応した異なる電圧を発生せしめ、該電圧
をケーブルにより伝送し、受信部においてディジタル化
し、そのディジタル化されたデータによりどのキースイ
ッチが押下されたかを認識することを特徴とするキース
イッチのアナログ伝送方式。In a key signal transmission method in which a key signal is transmitted by pressing a key switch located at a remote location, a plurality of the key switches are connected to a constant power source through different resistors corresponding to the key switches, When a switch is pressed, a different voltage corresponding to the switch is generated, the voltage is transmitted through a cable, digitized in the receiving section, and the digitized data is used to recognize which key switch has been pressed. Analog transmission method for key switches.
JP10946584A 1984-05-31 1984-05-31 Analog transmission system of key switch Pending JPS60254843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10946584A JPS60254843A (en) 1984-05-31 1984-05-31 Analog transmission system of key switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10946584A JPS60254843A (en) 1984-05-31 1984-05-31 Analog transmission system of key switch

Publications (1)

Publication Number Publication Date
JPS60254843A true JPS60254843A (en) 1985-12-16

Family

ID=14510915

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10946584A Pending JPS60254843A (en) 1984-05-31 1984-05-31 Analog transmission system of key switch

Country Status (1)

Country Link
JP (1) JPS60254843A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63534U (en) * 1986-06-20 1988-01-05

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63534U (en) * 1986-06-20 1988-01-05

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