JPH03104870U - - Google Patents
Info
- Publication number
- JPH03104870U JPH03104870U JP1184390U JP1184390U JPH03104870U JP H03104870 U JPH03104870 U JP H03104870U JP 1184390 U JP1184390 U JP 1184390U JP 1184390 U JP1184390 U JP 1184390U JP H03104870 U JPH03104870 U JP H03104870U
- Authority
- JP
- Japan
- Prior art keywords
- thermocouple
- digital converter
- analog
- power source
- output terminal
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
Description
第１図は本考案に係る熱電対周辺装置の一実施
例の回路構成図、第２図は交流電圧による誤差電
圧の波形を示す図、第３図は従来のバーンアウト
検出回路の一例を示した図、第４図は２個のＡ／
Ｄ変換器を熱電対に並列に接続した装置の構成図
である。
１……熱電対、ｒ……内部インピーダンス、Ｒ
……抵抗、Ｖｅ……交流電源、ＡＤ１，ＡＤ２…
…Ａ／Ｄ変換器。
Fig. 1 is a circuit configuration diagram of an embodiment of a thermocouple peripheral device according to the present invention, Fig. 2 is a diagram showing the waveform of error voltage due to AC voltage, and Fig. 3 is an example of a conventional burnout detection circuit. Figure 4 shows two A/
FIG. 2 is a configuration diagram of a device in which a D converter is connected in parallel to a thermocouple. 1...Thermocouple, r...Internal impedance, R
...Resistance, Ve...AC power supply, AD1, AD2...
...A/D converter.
Claims (1)
バーンアウト検出を行う第１のアナログ・デジタ
ル変換器と、この第１のアナログ・デジタル変換
器と並列に接続されていて、熱電対の測定値を検
出する積分型の第２のアナログ・デジタル変換器
とからなる熱電対周辺回路において、 交流電源と、 一端がこの交流電源に接続され、他端が前記熱
電対の高電位側の出力端子に接続された抵抗とを
備え、 前記交流電源の電源周波数は、前記第２のアナ
ログ・デジタル変換器の積分周波数の整数倍にな
ることを特徴とする熱電対周辺回路。[Claims for Utility Model Registration] A first analog-to-digital converter connected to the output terminal of the thermocouple to detect burnout of the thermocouple, and connected in parallel with the first analog-to-digital converter. A thermocouple peripheral circuit consisting of a second integral type analog-to-digital converter that detects the measured value of the thermocouple is connected to an AC power source, one end of which is connected to the AC power source, and the other end of which is connected to the thermocouple. a resistor connected to the output terminal on the high potential side of the pair, and the power supply frequency of the AC power source is an integral multiple of the integral frequency of the second analog-to-digital converter. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1184390U JPH0726713Y2 (en) | 1990-02-08 | 1990-02-08 | Thermocouple peripheral circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1184390U JPH0726713Y2 (en) | 1990-02-08 | 1990-02-08 | Thermocouple peripheral circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03104870U true JPH03104870U (en) | 1991-10-30 |
| JPH0726713Y2 JPH0726713Y2 (en) | 1995-06-14 |
Family
ID=31515360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1184390U Expired - Lifetime JPH0726713Y2 (en) | 1990-02-08 | 1990-02-08 | Thermocouple peripheral circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726713Y2 (en) |
-
1990
- 1990-02-08 JP JP1184390U patent/JPH0726713Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0726713Y2 (en) | 1995-06-14 |
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