JPS63163222A - Two-wire type temperature converter - Google Patents
Two-wire type temperature converterInfo
- Publication number
- JPS63163222A JPS63163222A JP31246886A JP31246886A JPS63163222A JP S63163222 A JPS63163222 A JP S63163222A JP 31246886 A JP31246886 A JP 31246886A JP 31246886 A JP31246886 A JP 31246886A JP S63163222 A JPS63163222 A JP S63163222A
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- thermocouple
- temperature
- signal line
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、温度信号の伝送と、変換器側への電力の供給
を、共通の２Ｐ；ｌ伝送路を介して行う２線式温度変換
器に関し、更に詳しくは、変換器側にマイクロコンピュ
ータを有し、熱電対からの起電力をこのマイクロコンピ
ュータでリニアライス等の信号処理を行い、例えば４〜
２０１１１Ａの統一規格信号として受信端側に伝送する
ようにした２４Ｉ式温度変ｔ！Ｊ１器に関するものであ
る。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a two-wire temperature conversion system that transmits a temperature signal and supplies power to the converter side via a common 2P;l transmission line. Regarding the converter, in more detail, it has a microcomputer on the converter side, and uses this microcomputer to perform signal processing such as linear rice on the electromotive force from the thermocouple.
24I type temperature change t! which is transmitted to the receiving end side as a unified standard signal of 20111A! This is related to the J1 device.
（従来の技術）
第４図はＣＡ、ＣＣ，ＩＣ等の熱電対を用いて温度を検
出し、信号伝送する従来の温度変換器の構成概念図であ
る。この変換器は、熱電対ＴＣと、この熱電対ＴＣから
の熱起電力を補償導線／ｐを介して入ツノする温度変換
器ＳＣとで構成され、温度変換器ＳＣは電源ＢＴ（例え
ばＤＣ２４Ｖ）から電力が供給されて動作し、温度信号
ｉｏ（例えば４−２４−２Ｏを負荷Ｌｏに出力するよう
になっている。(Prior Art) FIG. 4 is a conceptual diagram of a conventional temperature converter that detects temperature and transmits a signal using a thermocouple such as CA, CC, or IC. This converter is composed of a thermocouple TC and a temperature converter SC into which the thermoelectromotive force from the thermocouple TC is input via a compensation conductor /p, and the temperature converter SC is connected to a power source BT (for example, DC 24V). It operates by being supplied with electric power, and outputs a temperature signal io (for example, 4-24-2O) to the load Lo.
（発明が解決しようとする問題点）
しかしながら、このような構成の従来の温度変換器は、
熱電対ＴＣと温度変換器ＳＣとを結ぶ補ｌａ導線／ｌ）
が必要で、特に両者間の距離が数１０ｏｌ１１に及ぶ場
合等問題となる。又、湿度変換器ＳＣには、温度１５号
伝送用の信号線と、電力の供給線の４線が接続されるう
えに、熱電対の種別に応じたリニアライス回路や、スパ
ン変更のための回路を必要とし、構成が複雑で、且つ、
取扱いが煩しいという問題点が点がある。(Problem to be solved by the invention) However, the conventional temperature converter with such a configuration,
Auxiliary lead wire/l) connecting thermocouple TC and temperature converter SC
This becomes a problem, especially when the distance between the two is several 10ol11. In addition, the humidity converter SC is connected to four wires: a signal line for temperature No. 15 transmission and a power supply line, as well as a linear rice circuit according to the type of thermocouple and a line for changing the span. It requires a circuit, has a complicated configuration, and
The problem is that it is cumbersome to handle.
本発明はこれらの問題点に鑑みてなされたもので、その
目的は、温度変換器を簡単な構成とすると共に、この部
分を熱電対端子ボックス内に収納づることによって補償
導線を不要とすることのできる２線式温度変換器を実現
することにある。The present invention was made in view of these problems, and its purpose is to simplify the structure of the temperature converter and to eliminate the need for compensating conductors by housing this part in the thermocouple terminal box. The object of the present invention is to realize a two-wire temperature converter that can perform the following functions.
（問題点を解決するための手段）
第１図は本発明の２線式温度変換器の原理ブロック図で
ある。１は冷接点補償回路、２は熱電対ＴＣからの起′
心力に対応したディジタル信号と冷接点補償回路１から
の冷接点温度に対応したディジタル信号とを入力するマ
イクロコンピュータ、３は熱電対の種別を指定するため
のスイッチ手段、４はマイクロコンピュータ２からの出
力に応じて２線Ｇ号線ｌを流れる電流を制御する電流制
御手段、５は２線信号線ｌを介して受信端側から供給さ
れた電力をマイクロコンピュータ２を含む各回路に供給
する電源回路、ＢＴは２線信号線４に接続された直流電
源、Ｌｏは負荷である。(Means for Solving the Problems) FIG. 1 is a block diagram of the principle of a two-wire temperature converter according to the present invention. 1 is the cold junction compensation circuit, 2 is the origin from the thermocouple TC'
A microcomputer receives a digital signal corresponding to the cardiac force and a digital signal corresponding to the cold junction temperature from the cold junction compensation circuit 1; 3 is a switch means for specifying the type of thermocouple; 4 is a switch means for specifying the type of thermocouple; Current control means for controlling the current flowing through the 2-wire G line 1 according to the output; 5 is a power supply circuit that supplies power supplied from the receiving end side to each circuit including the microcomputer 2 via the 2-wire signal line 1; , BT is a DC power supply connected to the two-wire signal line 4, and Lo is a load.
マイクロコンピュータ２は、スイッチ手段Ｓによって指
定された種別に対応して熱電対起電力の対温度とのリニ
アライス演算を行うリニアライズ手段２１、冷接点補償
のための演算手段２２をメモリ内に有し、破線で囲んだ
部分は熱電対の端子ボックス内に収納されている。The microcomputer 2 has in its memory a linearizing means 21 that performs a linear arithmetical calculation of the thermocouple electromotive force versus temperature in accordance with the type specified by the switch means S, and a calculating means 22 for cold junction compensation. However, the part surrounded by the broken line is housed in the thermocouple terminal box.
（作用）
熱電対の端子ボックス内に収納されたマイクロコンピュ
ータを含む各回路は、２線信号線ｌを介して供給される
電源ＢＴからの電力によって動作し、マイクロコンピュ
ータ２は熱電対起電力に対し、リニアライズ演算、冷接
点補償のための演算刃を行い、電流制御手段４はマイク
ロコンピュータ２からの出力に応じて２線信号線ｌを流
れる電流を例えば４−４−２Ｏの範囲で制御する。(Function) Each circuit including the microcomputer housed in the terminal box of the thermocouple operates with power from the power supply BT supplied via the two-wire signal line l, and the microcomputer 2 responds to the thermocouple electromotive force. On the other hand, a calculation blade for linearization calculation and cold junction compensation is performed, and the current control means 4 controls the current flowing through the two-wire signal line l in accordance with the output from the microcomputer 2, for example, in the range of 4-4-2O. do.
（実施例） 以下、図面を用いて本発明の実施例を詳細に説明する。(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.
第２図は本発明の２線式温度変換器の一実施例を示す構
成ブロック図である。図において、第１図の各部分と対
応するものには同一符号を付して示す。△１は熱電対Ｔ
Ｃからの熱起電力を増幅する増幅器で、低オフヒツト、
低ドリフトの演算増幅器（ＯＰアンプ）が使用される。FIG. 2 is a block diagram showing an embodiment of the two-wire temperature converter of the present invention. In the figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals. △1 is thermocouple T
This is an amplifier that amplifies the thermoelectromotive force from C.
A low drift operational amplifier (OP amp) is used.
この増幅器Ａ１の増幅率は抵抗Ｒ１，Ｒ２を変えること
で変更でさるもので、これらの値は熱１￥′ｇ＋！ｉｉ
別・スパンに応じて変更する。ここに示した冷接点補償
回路１は、ダイオードＤ！のＰＮジャンクションの温度
依存性を利用したもので、ダイオードＤ１による温麿イ
３呂は、増幅器Ａ２を介して増幅するようにしでいる。The amplification factor of this amplifier A1 can be changed by changing the resistors R1 and R2, and these values are equal to the heat 1\'g+! ii
Change according to different/span. The cold junction compensation circuit 1 shown here includes a diode D! This takes advantage of the temperature dependence of the PN junction, and the temperature dependence of the diode D1 is amplified via the amplifier A2.
Ａｓはアナログスイッチで、増幅器へ〇からの熱電対起
電力増幅電圧ｅｔと、冷接点補償回路１からの冷接点補
償電圧ｅｓを選ＩＲシて取り出す。ＡＤはアナログスイ
ッチ、Ａ Ｓで取り出された電圧ｅｔとＯ８をディジタ
ル信号に変換してマイクロコンビコータ２に印加さける
アナログ・ディジタル変換器（△７′Ｄ変換器と略す）
である。アナログ・スイッチＡＳ及びＡ ／ Ｄ変換器
へ〇は、いずれらマイクロコンピュータ２によってコン
トロールされる。スイッチ手段３は、ここでは、一端が
コ七ンに接続された４個のスイッチ８１〜Ｓ４で構成さ
れる。ゲップスイッチ（ｄｉｐ−ｓｗｉｔｃｈ）が使用
され、各スイッチ８１〜Ｓ４のＡン、オフの組合せによ
って、熱電対種別・スパンを選択できるようにｔＭ成さ
れている。組合ｔ！例は、４個のスイッチ８１〜Ｓ４を
用いることによって、２４−１６通り設定可能であり、
スイッチの数を増加させることによって、更に多数通り
に拡張することができる。As is an analog switch that selects and takes out the thermocouple electromotive force amplified voltage et from 〇 and the cold junction compensation voltage es from the cold junction compensation circuit 1 to the amplifier. AD is an analog switch, and an analog-to-digital converter (abbreviated as △7'D converter) converts the voltage et and O8 taken out by AS into digital signals and applies them to the microcombi coater 2.
It is. The analog switch AS and the A/D converter are both controlled by the microcomputer 2. The switch means 3 here comprises four switches 81 to S4, each of which has one end connected to a connector. A dip switch is used, and the type and span of the thermocouple can be selected by the combination of ON and OFF of each switch 81 to S4. Union t! For example, 24-16 settings can be made by using four switches 81 to S4,
By increasing the number of switches, further expansion is possible.
Ｄ△はマイクロコンピュータ２から出力されるディジタ
ル信号をアナログ信号に変換するディジタルアナログ変
換器（Ｄ／Ａ変ＩＩＡ器）、△３＋Ａ４はＤ／Ａ変換器
ＤＡからのアナログ電圧信号を電流信号とする増幅器で
あり、（れぞれスパン調整用の可変抵抗器ＶＲ８，零点
調整用の可変抵抗器ＶＲＯを備えている。Ｑは２線（ｉ
ｆ Ｑ線！に接続した電流ルリ御用トーランジスタ、Ｒ
ｆは出力電流ＩＯに対応した電圧ｅｆを増幅器Ａ４の入
力端に帰）宣するための帰還抵抗である。電源回路５は
、定電圧回路を含んで構成され、各増幅器Ａ１〜Ａ４゜
Ａ／Ｄ変換器ＡＤ、マイクロコンピュータ２．Ｄ／△変
換５Ｄ△等に供給されており、これらの各回路は受信端
側にある直流電源ＢＴから２線信号ＦＱ ／を介して流
れる最低電流値、例えば４ｍＡ以下で動作するようにな
っている。D△ is a digital-to-analog converter (D/A converter IIA) that converts the digital signal output from the microcomputer 2 into an analog signal, and △3+A4 converts the analog voltage signal from the D/A converter DA into a current signal. The amplifier is equipped with a variable resistor VR8 for span adjustment and a variable resistor VRO for zero point adjustment.
f Q line! A current Ruri transistor connected to R
f is a feedback resistor for returning a voltage ef corresponding to the output current IO to the input terminal of the amplifier A4. The power supply circuit 5 includes a constant voltage circuit, each amplifier A1 to A4, an A/D converter AD, and a microcomputer 2. It is supplied to the D/△ conversion 5D△, etc., and each of these circuits is designed to operate at a minimum current value, for example, 4 mA or less, which flows from the DC power supply BT on the receiving end side through the 2-wire signal FQ /. There is.
第３図は第２図の一点鎖線で囲んだ温度変換器の端子ボ
ックス内への収納状態を示す断面図である。熱電対ＴＣ
からの素線は端子Ｔ＋ 、Ｔ−に接続され、又、受信端
（図示せず）に導かれる２線信号線ケーブル４は、端子
ｏ＋、Ｏ−に接続されている。そして、第２図において
、一点鎖線で囲んだ各回路部分、即ち増幅器Ａ＋〜△４
．冷接点補償回路１．アナログ・スイッチＡｓ、Ａ／［
）変換器ＡＤ、マイクロコンピュタ−２，Ｄ／Ａ変換器
ＤＡ、電流制御用トランジスタＱ等は、ハイブリッドＩ
Ｃ化され、端子ボックス内に収納されている。FIG. 3 is a cross-sectional view showing a state in which the temperature converter surrounded by the dashed line in FIG. 2 is housed in the terminal box. thermocouple TC
The bare wires from the terminal are connected to the terminals T+ and T-, and the two-wire signal line cable 4 led to the receiving end (not shown) is connected to the terminals o+ and O-. In FIG. 2, each circuit portion surrounded by a dashed line, that is, the amplifier A+ to △4
．． Cold junction compensation circuit 1. Analog switch As, A/[
) Converter AD, microcomputer 2, D/A converter DA, current control transistor Q, etc. are hybrid I
C and is housed in a terminal box.
このように構成した装置の動作を説明すれば、以下の通
りである。端子ボックス内に収納されているハイブリッ
ドＩＣ化された温度変換器部分には、２線信号線ｌを介
して、４ｍＡ〜２０ｍＡの電流が常時供給され、電源回
路５によって定電圧化され各回路の電源端に与えられて
いる。The operation of the device configured as described above will be explained as follows. A current of 4 mA to 20 mA is constantly supplied to the hybrid IC temperature converter part housed in the terminal box through the 2-wire signal line 1, and the voltage is made constant by the power supply circuit 5 to supply each circuit. Power is given at the end.
増幅器Ａ１は熱電対ＴＣからの熱起電力を増幅し、増幅
器Ａ２はダイオードＤ１による温度信号を増幅する。こ
れらの増幅信号は、アナログ・スイッチＡｓで交互に選
択され、Ａ／Ｄ変換器ＡＤでディジタル信号に変換され
、マイクロコンピュータ２に取れ込まれる。マイクロコ
ンピュータ２のリニアライズ手段２１は、スイッチ手段
３によって設定された信号の組合せ、即ち、熱電対ＴＣ
の種別に応じて、折線近似演蓮を行い、対測定温度に対
し、リニアな関係にあるデータを得る。尚、マイクロコ
ンピュータ２のメモリには、予め各種熱電対の起電力に
対するリニアライズ演算式を格納してあり、スイッチ手
段３の設定によって、使用されている熱電対の種類に対
応した演算式が適用される。又、冷接点補償演算手段２
２は、冷接点補償のための演算を行う。Amplifier A1 amplifies the thermoelectromotive force from thermocouple TC, and amplifier A2 amplifies the temperature signal from diode D1. These amplified signals are alternately selected by analog switches As, converted into digital signals by A/D converter AD, and input into microcomputer 2. The linearizing means 21 of the microcomputer 2 combines the signals set by the switching means 3, that is, the thermocouple TC
According to the type of temperature, linear approximation is performed to obtain data that has a linear relationship with the measured temperature. Note that the memory of the microcomputer 2 stores in advance linearization calculation formulas for the electromotive force of various thermocouples, and by setting the switch means 3, the calculation formula corresponding to the type of thermocouple being used is applied. be done. In addition, cold junction compensation calculation means 2
2 performs calculations for cold junction compensation.
マイクロコンピュータ２内で、リニアライズされ且つ冷
接点補償されたディジタル信号は、Ｄ／△変換器ＤΔり
よりアナログ信号に変換され、増幅器Ａ３＋△４を介し
てトランジスタＱに印加される。トランジスタＱは２線
信号線ｌを介して流れる電流Ｉｏを、４〜２０ｍＡの範
囲内で測定温度に応じて制御する。トランジスタＱによ
って、制御された電流１ｏは２線信号線ｉを介して受信
端側に設置されている負荷Ｌｏに伝送される。In the microcomputer 2, the linearized and cold-junction compensated digital signal is converted into an analog signal by a D/Δ converter DΔ and applied to a transistor Q via an amplifier A3+Δ4. The transistor Q controls the current Io flowing through the two-wire signal line l within a range of 4 to 20 mA according to the measured temperature. The controlled current 1o is transmitted by the transistor Q to the load Lo installed on the receiving end side via the two-wire signal line i.
尚、第２図装置では、スパン調整と零点調整を抵ＶτＶ
Ｒ３，ＶＲＯによって行うようにしたちのであるが、こ
れらをマイクロコンピュータ２で行うようにしてもよい
。又、マイクロコンピュータ２の入力側にアナログスイ
ッチＡｓ及びＡ／Ｄ変換器Ａ Ｄ ｆ ＫＢ ’ｒｊた
ものを示したが、マイクロコンピュータに、これらと同
じ機能をもたせるようにすれば省略できる。In the device shown in Figure 2, span adjustment and zero point adjustment are performed using resistance VτV.
Although the R3 and VRO are used to perform these operations, the microcomputer 2 may also perform these operations. Furthermore, although an analog switch As and an A/D converter ADfKB'rj are shown on the input side of the microcomputer 2, they can be omitted if the microcomputer is provided with the same functions as these.
（発明の効果）
以上詳細に説明したよように、本発明は、リニアライズ
）１１弾や冷接点補償演算等を行うマイクロコンピュー
タ及びその周辺回路をハイブリッドＩＣ化するなど１ノ
、熱電対端子ボックス内に収納すると共に、この端子ボ
ックスと受信端とを２線信号線で結ぶことができるよう
にしたものである。(Effects of the Invention) As explained in detail above, the present invention provides a thermocouple terminal box, a thermocouple terminal box, etc. by converting a microcomputer and its peripheral circuits into hybrid ICs that perform linearization) 11 bullets, cold junction compensation calculations, etc. The terminal box and the receiving end can be connected with a two-wire signal line.
従って、本発明によれば、補償導線を不要とし、全体構
成の簡単な２線式温度変換器が実現できる。Therefore, according to the present invention, it is possible to realize a two-wire temperature converter that does not require a compensating lead wire and has a simple overall configuration.
第１図は本発明の２線式変換器の原理ブロック図、第２
図は本発明の一実施例の構成ブロック図、第３図は第２
同温度変換器の熱電対端子ボックス内への収納状態を示
す断面図、第４図は従来の温度変換器の構成概念図であ
る。
１・・・冷接点補償回路
２・・・マイクロコンピュータ
３・・・スイッチ手段 ４・・・電流制御手段５・・
・電源回路 ２１・・・リニアライズ手段２２・
・・冷接点補償演算手段
４・・・２椋（：５号線
特許出願人 三井東圧化学株式会社外１名
代 理 人 弁理士 几 島 藤 治
外１名
筒１ 図
２、マイクロコンピュータ
３、スイッチ手段
２１、リニアライズ平身
２２、冷接点補償演算手工９
１ｒ２線信弓線
ＢＴｉ直流電瀝Fig. 1 is a principle block diagram of the two-wire converter of the present invention, Fig.
The figure is a block diagram of the configuration of one embodiment of the present invention, and FIG.
FIG. 4 is a cross-sectional view showing how the temperature converter is housed in the thermocouple terminal box, and is a conceptual diagram of the structure of a conventional temperature converter. 1...Cold junction compensation circuit 2...Microcomputer 3...Switch means 4...Current control means 5...
・Power supply circuit 21...linearization means 22・
...Cold junction compensation calculation means 4...2 (: Line 5 Patent applicant: 1 representative from Mitsui Toatsu Chemical Co., Ltd. Patent attorney: Fuji Kashima, 1 representative) Figure 2, Microcomputer 3, Switch means 21, linearization flat body 22, cold junction compensation calculation procedure 9 1r2 line Shinkyu line BTi DC electric wire
Claims (1)
ィジタル信号及び前記冷接点補償回路からの冷接点温度
に対応したディジタル信号を入力するマイクロコンピュ
ータと、このマイクロコンピュータに結合し、前記熱電
対の種別を指定するためのスイッチ手段と、前記マイク
ロコンピュータからの演算出力に応じて２線信号線を流
れる電流を制御する電流制御手段と、前記２線信号線を
介して受信端側から供給された電圧を前記マイクロコン
ピュータを含む各回路の電源端に与える電源回路とを備
え、前記マイクロコンピュータは少なくとも前記スイッ
チ手段によって指定された熱電対の種別に対応する演算
式によるリニアライズ演算と、冷接点補償のための演算
とを行うものであり、前記冷接点補償回路、マイクロコ
ンピュータ、スイッチ手段、電流制御手段及び電源回路
はいずれも熱電対の端子ボックス内に収納されているこ
とを特徴とする２線式温度変換器。a cold junction compensation circuit; a microcomputer that receives a digital signal corresponding to the thermoelectromotive force from the thermocouple and a digital signal corresponding to the cold junction temperature from the cold junction compensation circuit; a switch means for specifying the type of the pair; a current control means for controlling the current flowing through the two-wire signal line according to the calculation output from the microcomputer; and a current supplied from the receiving end side via the two-wire signal line. a power supply circuit that supplies the voltage to the power supply end of each circuit including the microcomputer, and the microcomputer at least performs a linearization calculation based on an arithmetic expression corresponding to the type of thermocouple specified by the switch means, and a cooling The cold junction compensation circuit, the microcomputer, the switch means, the current control means, and the power supply circuit are all housed in a terminal box of the thermocouple. 2-wire temperature converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61312468A JPH07113584B2 (en) | 1986-12-26 | 1986-12-26 | 2-wire temperature converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61312468A JPH07113584B2 (en) | 1986-12-26 | 1986-12-26 | 2-wire temperature converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63163222A true JPS63163222A (en) | 1988-07-06 |
| JPH07113584B2 JPH07113584B2 (en) | 1995-12-06 |
Family
ID=18029562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61312468A Expired - Lifetime JPH07113584B2 (en) | 1986-12-26 | 1986-12-26 | 2-wire temperature converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07113584B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003016846A1 (en) * | 2001-08-14 | 2003-02-27 | Schneider Automation Inc. | Solid state temperature measuring device and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19934489C2 (en) * | 1999-07-22 | 2001-09-06 | Webasto Thermosysteme Gmbh | Circuit for evaluating thermocouple measurement signals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4929157A (en) * | 1972-05-08 | 1974-03-15 | ||
| JPS4959553U (en) * | 1972-08-31 | 1974-05-25 | ||
| JPS60119139A (en) * | 1983-11-30 | 1985-06-26 | Yokogawa Hokushin Electric Corp | Two-wire transmission unit |
-
1986
- 1986-12-26 JP JP61312468A patent/JPH07113584B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4929157A (en) * | 1972-05-08 | 1974-03-15 | ||
| JPS4959553U (en) * | 1972-08-31 | 1974-05-25 | ||
| JPS60119139A (en) * | 1983-11-30 | 1985-06-26 | Yokogawa Hokushin Electric Corp | Two-wire transmission unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003016846A1 (en) * | 2001-08-14 | 2003-02-27 | Schneider Automation Inc. | Solid state temperature measuring device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07113584B2 (en) | 1995-12-06 |
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