JPH03123237U - - Google Patents
Info
- Publication number
- JPH03123237U JPH03123237U JP3297390U JP3297390U JPH03123237U JP H03123237 U JPH03123237 U JP H03123237U JP 3297390 U JP3297390 U JP 3297390U JP 3297390 U JP3297390 U JP 3297390U JP H03123237 U JPH03123237 U JP H03123237U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- fixed contact
- terminal
- resistance temperature
- changeover switch
- 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
- 239000003990 capacitor Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
第１図は本考案の一実施例のブロツク図、第２
図乃至第４図は従来の装置のブロツク図である。
Ｒｔ……測温抵抗体、Ｉ……定電流源、Ｃ１〜
Ｃ４……コンデンサ、ＳＣ１，ＳＣ２……スイツ
チトキヤパシタ、ＣＳ１〜ＣＳ４……切換スイツ
チ、Ａ１……アンプ、ＡＤＣ……Ａ／Ｄ変換器、
ＣＰＵ……演算部。
Fig. 1 is a block diagram of an embodiment of the present invention;
4 through 4 are block diagrams of conventional devices. Rt ...Resistance temperature sensor, I...Constant current source, C1 ~
C4 ... Capacitor, SC1 , SC2 ... Switch capacitor, CS1 to CS4 ... Changeover switch, A1 ... Amplifier, ADC... A/D converter,
CPU...Arithmetic unit.
Claims (1)
線式の測温抵抗体と、 該測温抵抗体の端子Ａに接続され、測定用電流
を供給する定電流源と、 第１のコンデンサＣ１と、 第１のコンデンサＣ１と静電容量が等しく一端
が接地された第２のコンデンサＣ２と、 第３のコンデンサＣ３と、 第３のコンデンサＣ３と静電容量が等しく一端
が接地された第４のコンデンサＣ４と、 前記第１のコンデンサＣ１の両端に接続され、
連動して切換駆動される第１、第２の切換スイツ
チＣＳ１，ＣＳ２と、 前記第３のコンデンサＣ３の両端に接続され、
連動して切換駆動される第３、第４の切換スイツ
チＣＳ３，ＣＳ４とを具備し、 前記第１の切換スイツチＣＳ１の第１の固定接
点ａは前記測温抵抗体の端子Ｂに接続されて第２
の固定接点ｂは前記第２のコンデンサＣ２の他端
に接続され、前記第２の切換スイツチＣＳ２の第
１の固定接点ａは前記測温抵抗体の端子ｂに接続
されて第２の固定接点ｂは前記測温抵抗体の端子
Ｂに接続され、 前記第３の切換スイツチＣＳ３の第１の固定接
点ａは前記測温抵抗体の端子Ａに接続されて第２
の固定接点ｂは前記第４のコンデンサＣ４の他端
に接続され、前記第４の切換スイツチＣＳ４の第
１の固定接点ａは前記第２のコンデンサＣ２の他
端に接続されて第２の固定接点ｂは前記第４のコ
ンデンサＣ４の一端に接続されたことを特徴とす
る測温抵抗体回路。[Claims for Utility Model Registration] 3 having terminals A, B, and b, with terminal b being grounded.
A wire-type resistance temperature detector, a constant current source connected to terminal A of the resistance temperature detector and supplying a measurement current, a first capacitor C1 , and a capacitance of the first capacitor C1 . a second capacitor C2 whose one end is grounded; a third capacitor C3 ; a fourth capacitor C4 whose capacitance is equal to that of the third capacitor C3 and whose one end is grounded; 1 capacitor C is connected to both ends of 1 ,
connected to both ends of the first and second changeover switches CS 1 and CS 2 that are switched and driven in conjunction with each other, and the third capacitor C 3 ;
It is equipped with third and fourth changeover switches CS 3 and CS 4 which are switched and driven in conjunction with each other, and the first fixed contact a of the first changeover switch CS 1 is connected to the terminal B of the resistance temperature detector. connected second
The fixed contact b of the second capacitor C2 is connected to the other end of the second capacitor C2 , and the first fixed contact a of the second changeover switch CS2 is connected to the terminal b of the temperature sensing resistor and the second A fixed contact b is connected to a terminal B of the resistance temperature sensor, and a first fixed contact a of the third changeover switch CS3 is connected to a terminal A of the resistance temperature sensor and a second
The fixed contact b of the fourth changeover switch CS4 is connected to the other end of the fourth capacitor C4 , and the first fixed contact a of the fourth changeover switch CS4 is connected to the other end of the second capacitor C2 . 2. A resistance temperature detector circuit, characterized in that the fixed contact b of the fourth capacitor C4 is connected to one end of the fourth capacitor C4 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3297390U JPH0754829Y2 (en) | 1990-03-29 | 1990-03-29 | Resistance temperature detector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3297390U JPH0754829Y2 (en) | 1990-03-29 | 1990-03-29 | Resistance temperature detector circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03123237U true JPH03123237U (en) | 1991-12-16 |
| JPH0754829Y2 JPH0754829Y2 (en) | 1995-12-18 |
Family
ID=31536280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3297390U Expired - Lifetime JPH0754829Y2 (en) | 1990-03-29 | 1990-03-29 | Resistance temperature detector circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754829Y2 (en) |
-
1990
- 1990-03-29 JP JP3297390U patent/JPH0754829Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0754829Y2 (en) | 1995-12-18 |