JPH04359399A - Three-wire signal processor - Google Patents
Three-wire signal processorInfo
- Publication number
- JPH04359399A JPH04359399A JP15988191A JP15988191A JPH04359399A JP H04359399 A JPH04359399 A JP H04359399A JP 15988191 A JP15988191 A JP 15988191A JP 15988191 A JP15988191 A JP 15988191A JP H04359399 A JPH04359399 A JP H04359399A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- wire
- multiplexer
- sensors
- converter
- 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 abstract description 3
- 230000003287 optical effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、多数のセンサからの３
線信号を切り換え、それぞれ２線信号として出力するよ
うにした３線信号処理装置に関するものである。本発明
は、例えば多数の測温抵抗体を利用した多点数温度計測
に有用である。[Industrial Application Field] The present invention provides three
The present invention relates to a three-wire signal processing device that switches line signals and outputs each line signal as a two-line signal. The present invention is useful, for example, in multi-point temperature measurement using a large number of resistance temperature sensors.
【０００２】0002
【従来の技術】測温抵抗体を利用して温度計測をする場
合、温度変化に対応した抵抗値の変化が出力信号となる
。そして、この出力信号を信号変換部としてのブリッジ
回路によって電圧又は電流信号に変換し、これをＡ／Ｄ
変換装置に入力させていた。このような構成において、
前記測温抵抗体と前記ブリッジ回路間の配線は、ブリッ
ジを常に平衡させて導線抵抗の影響を除去するため、一
般に３線式とされている。2. Description of the Related Art When temperature is measured using a resistance temperature detector, a change in resistance value corresponding to a change in temperature becomes an output signal. Then, this output signal is converted into a voltage or current signal by a bridge circuit as a signal converter, and this is converted into an A/D signal.
It was input into a converter. In such a configuration,
The wiring between the temperature measuring resistor and the bridge circuit is generally a three-wire type in order to always balance the bridge and eliminate the influence of conductor resistance.
【０００３】図４は、多数の測温抵抗体Ｓ１ …，Ｓｎ
からの信号を切り換えて出力し、データ計測に供する
従来の信号処理装置を示している。各測温抵抗体Ｓ１
，…，Ｓｎ からの信号は前述したように３線式である
が、従来のマルチプレクサ１００は２線式（例えば＋，
−）の信号でないと取込めない。このため、各測温抵抗
体Ｓの出力信号を直接マルチプレクサ１００に接続する
ことはできない。このため従来は、図示のように、各セ
ンサごとに信号変換部１０１を取付け、その２線式の各
出力信号を共通のマルチプレクサ１００に入力していた
。そして、マルチプレクサ１００で選択した信号がＡ／
Ｄ変換装置１０２に入力されるようになっていた。FIG. 4 shows a large number of resistance temperature sensors S1...,Sn
This figure shows a conventional signal processing device that switches and outputs signals from the 3D and 3D signals for data measurement. Each resistance temperature sensor S1
,...,Sn is a three-wire type signal as described above, but the conventional multiplexer 100 is a two-wire type signal (for example, +,
-) signals cannot be captured. Therefore, the output signal of each resistance temperature sensor S cannot be directly connected to the multiplexer 100. For this reason, conventionally, as shown in the figure, a signal converter 101 was attached to each sensor, and each two-wire output signal was input to a common multiplexer 100. Then, the signal selected by the multiplexer 100 is
It was designed to be input to the D conversion device 102.
【０００４】0004
【発明が解決しようとする課題】前述した従来の信号処
理装置によれば、各センサごとに信号変換部１０１を設
けなければならなかったので、装置全体が大きくなり、
値段も高価になるという問題点があった。[Problems to be Solved by the Invention] According to the conventional signal processing device described above, it is necessary to provide a signal converter 101 for each sensor, which increases the size of the entire device.
There was also a problem that the price was high.
【０００５】本発明は、３線式の信号を出力するセンサ
を多数備え、各センサからの信号を選択的に出力する信
号処理装置において、３線式信号を２線式信号に変換す
る信号変換部を各センサで共通化し、装置全体をコンパ
クト化するとともにコストを低減することを目的として
いる。[0005] The present invention provides a signal processing device that includes a large number of sensors that output three-wire signals and selectively outputs signals from each sensor. The purpose is to make the entire device more compact and reduce costs by making the parts common to each sensor.
【０００６】[0006]
【課題を解決するための手段】本発明の３線信号処理装
置は、抵抗値の変化を３線式の信号として出力する複数
個のセンサと、前記各センサからの信号を切換えて出力
する３線式のマルチプレクサと、前記マルチプレクサか
らの出力を２線式の電気信号に変換して出力する共通の
信号変換部とを具備している。[Means for Solving the Problems] A three-wire signal processing device of the present invention includes a plurality of sensors that output changes in resistance values as three-wire signals, and a three-wire signal processing device that switches and outputs signals from each of the sensors. It includes a wire-type multiplexer and a common signal conversion section that converts the output from the multiplexer into a two-wire electric signal and outputs it.
【０００７】[0007]
【作用】各センサからの３線式の信号は、マルチプレク
サで切換えて出力され、共通の信号変換部において２線
式の信号に変換されて出力される。[Operation] Three-wire signals from each sensor are switched and output by a multiplexer, and converted into a two-wire signal by a common signal converter and output.
【０００８】[0008]
【実施例】図１により第１実施例を説明する。この３線
信号処理装置１は、３線式の信号を出力する２個のセン
サＳ１ ，Ｓ２ と、３線式の信号を切換えて出力する
マルチプレクサ２と、３線式の信号を２線式の信号にし
て出力する共通の信号変換器３と、信号変換器３からの
アナログ信号をデジタル信号に変換するＡ／Ｄ変換装置
４とを有している。[Embodiment] A first embodiment will be explained with reference to FIG. This 3-wire signal processing device 1 includes two sensors S1 and S2 that output 3-wire signals, a multiplexer 2 that switches and outputs 3-wire signals, and a 2-wire signal that converts 3-wire signals into 2-wire signals. It has a common signal converter 3 that converts the signal into a signal and outputs it, and an A/D converter 4 that converts the analog signal from the signal converter 3 into a digital signal.
【０００９】まず、２個のセンサＳ１ ，Ｓ２ は、例
えば前述した測温抵抗体のような抵抗値の変化を３線信
号として出力するものである。但し測定量は温度に限ら
ず、圧力等であってもよい。First, the two sensors S1 and S2 output a change in resistance value as a three-wire signal, for example, like the above-mentioned temperature-measuring resistor. However, the measured quantity is not limited to temperature, but may also be pressure or the like.
【００１０】次に、マルチプレクサ２は、各センサＳ，
Ｓ２ ごとにそれぞれ切換え部５を有している。各切換
え部５は、センサＳの３本の各導線に対応する３個の光
ＭＯＳＦＥＴリレー６をそれぞれ有している。光ＭＯＳ
ＦＥＴリレー６は、光ＭＯＳＦＥＴ７と発光ダイオード
８を有している。光ＭＯＳＦＥＴ７は、ソース側に導線
が接続され、ドレイン側が出力端子に接続されている。
光ＭＯＳＦＥＴ７をＯＮ・ＯＦＦする発光ダイオード８
は、アノード側が電源端子に接続され、カソード側は切
換え部５内で３本が共通接続されて切換えスイッチ９の
端子に接続されている。Next, the multiplexer 2 connects each sensor S,
Each S2 has a switching section 5. Each switching section 5 has three optical MOSFET relays 6 corresponding to the three conductive wires of the sensor S, respectively. Optical MOS
The FET relay 6 includes an optical MOSFET 7 and a light emitting diode 8. The optical MOSFET 7 has its source side connected to a conducting wire, and its drain side connected to an output terminal. Light emitting diode 8 that turns on and off the optical MOSFET 7
The anode side is connected to the power supply terminal, and the cathode side is connected to the terminal of the changeover switch 9 through three common connections within the switching section 5 .
【００１１】次に、信号変換器３はブリッジ回路から構
成されており、前記マルチプレクサ２から出力される３
線式の信号を、２線式の信号である電圧又は電流信号に
変換して出力するようになっている。Next, the signal converter 3 is composed of a bridge circuit, and the signal converter 3 is composed of a bridge circuit, and the signal converter 3 outputs the signal from the multiplexer 2.
A wire signal is converted into a two-wire voltage or current signal and output.
【００１２】次に、以上の構成における作用を説明する
。前記マルチプレクサ２において切換えスイッチ９がＯ
ＦＦの時、各切換え部５の発光ダイオード８には電流が
流れないので、すべての光ＭＯＳＦＥＴ７はＯＦＦとな
り、すべての入力端子と出力端子は電気的に切断される
。Next, the operation of the above configuration will be explained. In the multiplexer 2, the changeover switch 9 is set to O.
At the time of FF, no current flows through the light emitting diode 8 of each switching section 5, so all optical MOSFETs 7 are turned off, and all input terminals and output terminals are electrically disconnected.
【００１３】次に、前記切換えスイッチ９が端子（１）
において閉じられると、センサＳ１ 側の切換え部５に
おいて、３個の発光ダイオード８に電流が流れる。これ
によって３個の光ＭＯＳＦＥＴ７はすべてＯＮとなり、
センサＳ１ の３線分の各信号が同時に出力端子ＯＵＴ
１〜３に出力される。Next, the changeover switch 9 is connected to the terminal (1).
When it is closed, current flows through the three light emitting diodes 8 in the switching section 5 on the sensor S1 side. As a result, all three optical MOSFETs 7 are turned on,
Each signal of the three line segments of sensor S1 is output to the output terminal OUT at the same time.
1 to 3 are output.
【００１４】また、前記切換えスイッチ９を端子（２）
において閉じれば、センサＳ１ 側の光ＭＯＳＦＥＴリ
レー６はＯＦＦとなり、センサＳ２側の光ＭＯＳＦＥＴ
リレー６がＯＮとなってセンサＳ２ の３線分の各信号
が同時に出力端子ＯＵＴ１〜３に出力される。[0014] Also, the changeover switch 9 is connected to the terminal (2).
, the optical MOSFET relay 6 on the sensor S1 side turns OFF, and the optical MOSFET relay 6 on the sensor S2 side turns off.
The relay 6 is turned on and the signals of the three lines of the sensor S2 are simultaneously output to the output terminals OUT1 to OUT3.
【００１５】即ち、前記マルチプレクサ２の切換えスイ
ッチ９を切換えることにより、各センサＳ１ ，Ｓ２
の入力が互いに干渉することなく出力端子ＯＵＴ１〜３
に集中して出力され、１個の信号変換器３に入力される
。そして信号変換器３が出力する２線式の電圧又は電流
信号は、Ａ／Ｄ変換装置４へ入力される。That is, by switching the changeover switch 9 of the multiplexer 2, each sensor S1, S2
output terminals OUT1 to OUT3 without interfering with each other.
The signals are output in a concentrated manner and input to one signal converter 3. The two-wire voltage or current signal output from the signal converter 3 is input to the A/D converter 4.
【００１６】図２及び図３により第２実施例を説明する
。この３線信号処理装置１１は、１０個のセンサＳ１
…Ｓ１０を有している。３線式のマルチプレクサ１２は
、第１実施例とほぼ同様の基本構造を有している。即ち
、３個の光ＭＯＳＦＥＴリレー６からなる切換え部５が
、各センサＳに対応して合計１０個設けられている。A second embodiment will be explained with reference to FIGS. 2 and 3. This three-wire signal processing device 11 includes ten sensors S1
...has S10. The three-wire multiplexer 12 has almost the same basic structure as the first embodiment. That is, a total of ten switching units 5 each consisting of three optical MOSFET relays 6 are provided corresponding to each sensor S.
【００１７】そして各切換え部５からの３本の出力は共
通の３個の出力端子ＯＵＴ１〜３にそれぞれ接続されて
いる。また、各切換え部５内でそれぞれ共通接続された
発光ダイオード８のカソード側は、切換え用ＩＣ２０の
各入力端子（１）〜（１０）にそれぞれ接続されている
。この切換え用ＩＣ２０は、切換え信号入力端子Ｘ１，
Ｘ２，Ｘ３，Ｘ４を有しており、これら４つの端子に入
力されるデジタル信号の組合せによって、前記１０個の
入力端子（１）〜（１０）を１つづつＯＮとするように
構成されている。前記端子Ｘ１〜Ｘ４に加えられる切換
え信号と、これに対応して選択される入力端子及びセン
サの組合せは図３に示す通りである。The three outputs from each switching section 5 are connected to three common output terminals OUT1 to OUT3, respectively. Further, the cathode sides of the light emitting diodes 8 commonly connected within each switching section 5 are respectively connected to the respective input terminals (1) to (10) of the switching IC 20. This switching IC 20 has switching signal input terminals X1,
It has X2, X3, and There is. The switching signals applied to the terminals X1 to X4 and the combinations of input terminals and sensors selected correspondingly are as shown in FIG.
【００１８】前記マルチプレクサ１２に接続された信号
変換器３と、該信号変換器３の出力側に接続されたＡ／
Ｄ変換装置４の構成は第１実施例と同じである。A signal converter 3 connected to the multiplexer 12 and an A/C converter 3 connected to the output side of the signal converter 3.
The configuration of the D converter 4 is the same as in the first embodiment.
【００１９】以上の構成によれば、前記マルチプレクサ
１２において、切換え用ＩＣ２０にデジタルの切換え信
号を与えることにより、所望の切換え部５をＯＮにして
任意のセンサＳの出力を信号変換器３へ与えるようにす
ることができる。According to the above configuration, in the multiplexer 12, by applying a digital switching signal to the switching IC 20, a desired switching unit 5 is turned on and the output of an arbitrary sensor S is applied to the signal converter 3. You can do it like this.
【００２０】[0020]
【発明の効果】本発明の３線信号処理装置によれば、複
数のセンサからの３線式信号を３線式のマルチプレクサ
で切換え、共通の信号変換部で２線式信号に変換して出
力するようにしている。このため、従来に比べて信号変
換部の数を少なくできるので、装置がコンパクトになり
、コストが低減するという効果がある。[Effects of the Invention] According to the 3-wire signal processing device of the present invention, 3-wire signals from a plurality of sensors are switched by a 3-wire multiplexer, converted into a 2-wire signal by a common signal converter, and output. I try to do that. Therefore, the number of signal converters can be reduced compared to the conventional method, which has the effect of making the device more compact and reducing costs.
【図１】第１実施例の回路図である。FIG. 1 is a circuit diagram of a first embodiment.
【図２】第２実施例の回路図である。FIG. 2 is a circuit diagram of a second embodiment.
【図３】第２実施例において、センサを選択する際に切
換え用ＩＣに与える切換え信号の組合せを示す表である
。FIG. 3 is a table showing combinations of switching signals applied to a switching IC when selecting a sensor in the second embodiment.
【図４】従来の信号処理装置の構成を示すブロック図で
ある。FIG. 4 is a block diagram showing the configuration of a conventional signal processing device.
Ｓ センサ １，１１ ３線信号処理装置 ２，１３ ３線式のマルチプレクサ ３ 信号変換部としての信号変換器 S sensor 1,11 3-wire signal processing device 2,13 3-wire multiplexer 3 Signal converter as a signal converter
Claims (1)
力する複数個のセンサと、前記各センサからの信号を切
換えて出力する３線式のマルチプレクサと、前記マルチ
プレクサからの出力を２線式の電気信号に変換して出力
する共通の信号変換部とを具備する３線信号処理装置。1. A plurality of sensors that output changes in resistance values as 3-wire signals, a 3-wire multiplexer that switches and outputs signals from each sensor, and a 3-wire multiplexer that outputs a change in resistance value as a 3-wire signal; A 3-wire signal processing device comprising a common signal converter that converts into an electric signal of the formula and outputs it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15988191A JPH04359399A (en) | 1991-06-05 | 1991-06-05 | Three-wire signal processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15988191A JPH04359399A (en) | 1991-06-05 | 1991-06-05 | Three-wire signal processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04359399A true JPH04359399A (en) | 1992-12-11 |
Family
ID=15703236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15988191A Pending JPH04359399A (en) | 1991-06-05 | 1991-06-05 | Three-wire signal processor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04359399A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002148124A (en) * | 2000-07-28 | 2002-05-22 | Valeo Climatisation | Measuring instrument for heating/air-conditioning facility |
| JP2007333574A (en) * | 2006-06-15 | 2007-12-27 | Sanyo Electric Co Ltd | Sensing device |
| US7496458B2 (en) * | 2001-01-22 | 2009-02-24 | I F M Electronic Gmbh | Electrical transducer |
| JP2010261901A (en) * | 2009-05-11 | 2010-11-18 | Daiichi Keiki Seisakusho Co Ltd | Temperature-pressure meter |
| JP2019132618A (en) * | 2018-01-29 | 2019-08-08 | ルネサスエレクトロニクス株式会社 | Semiconductor device, load driving system, and current detection method for inductor current |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50127532A (en) * | 1974-03-27 | 1975-10-07 | ||
| JPS5727394A (en) * | 1980-06-12 | 1982-02-13 | United Technologies Corp | Interface between analog signal and digital signal and ac synchro angle-to-digital signal converter |
-
1991
- 1991-06-05 JP JP15988191A patent/JPH04359399A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50127532A (en) * | 1974-03-27 | 1975-10-07 | ||
| JPS5727394A (en) * | 1980-06-12 | 1982-02-13 | United Technologies Corp | Interface between analog signal and digital signal and ac synchro angle-to-digital signal converter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002148124A (en) * | 2000-07-28 | 2002-05-22 | Valeo Climatisation | Measuring instrument for heating/air-conditioning facility |
| US7496458B2 (en) * | 2001-01-22 | 2009-02-24 | I F M Electronic Gmbh | Electrical transducer |
| JP2007333574A (en) * | 2006-06-15 | 2007-12-27 | Sanyo Electric Co Ltd | Sensing device |
| JP2010261901A (en) * | 2009-05-11 | 2010-11-18 | Daiichi Keiki Seisakusho Co Ltd | Temperature-pressure meter |
| JP2019132618A (en) * | 2018-01-29 | 2019-08-08 | ルネサスエレクトロニクス株式会社 | Semiconductor device, load driving system, and current detection method for inductor current |
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