JPH0521028Y2 - - Google Patents
Info
- Publication number
- JPH0521028Y2 JPH0521028Y2 JP1984067541U JP6754184U JPH0521028Y2 JP H0521028 Y2 JPH0521028 Y2 JP H0521028Y2 JP 1984067541 U JP1984067541 U JP 1984067541U JP 6754184 U JP6754184 U JP 6754184U JP H0521028 Y2 JPH0521028 Y2 JP H0521028Y2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- resistor
- differential amplifier
- fixed resistor
- amplifier
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
【考案の詳細な説明】
〔技術分野〕
本考案は、測定量検出用の抵抗器の抵抗値に比
例した周期の発振を行う抵抗周期変換発振器に関
するものである。[Detailed Description of the Invention] [Technical Field] The present invention relates to a resistance period conversion oscillator that oscillates with a period proportional to the resistance value of a resistor for detecting a measured quantity.
従来、温度、その他の測定において、検出器と
して測定量によつて抵抗値が変化する検出用抵抗
器を用いている。
Conventionally, in temperature and other measurements, a detection resistor whose resistance value changes depending on the measured quantity has been used as a detector.
通常、抵抗値を周波数に変換し、その周波数を
デジタル処理することによつて、測定量、あるい
は制御量を作つている。 Usually, a measured quantity or a controlled quantity is created by converting a resistance value into a frequency and digitally processing the frequency.
しかしながら上記、測定あるいは制御において
は、周波数の逆数を用いるために、煩雑な信号処
理および演算を行わなければならず欠点となつて
いた。 However, in the above-mentioned measurement or control, since the reciprocal of the frequency is used, complicated signal processing and calculations have to be performed, which is a drawback.
本考案は、上記の欠点を解消することを目的と
し、検出抵抗に正比例した周期を有し、発振する
抵抗周期変換発振器を提供するものである。
The present invention aims to eliminate the above-mentioned drawbacks and provides a resistance period conversion oscillator that oscillates and has a period directly proportional to the detection resistance.
本考案によれば、検出用抵抗器と固定抵抗器を
直列に接続したものを差動増巾器の負荷として接
続しその２つの抵抗器の直列接続点を差動増巾器
の反転入力端子に接続し、前記差動増巾器の非反
転入力端子に定電圧電源を接続すると共に、前記
固定抵抗器の両端間の電圧を、アース線電圧が零
レベルとなる電圧に増巾するレベルシフト増巾器
に接続し、このレベルシフト増巾器の出力をＶ／
Ｆ発振器の入力側に接続して、検出用抵抗器の抵
抗値に比例した周期の発振出力を得る抵抗周期変
換発振器が得られる。
According to the present invention, a detection resistor and a fixed resistor connected in series are connected as a load of a differential amplifier, and the series connection point of the two resistors is connected to the inverting input terminal of the differential amplifier. and connect a constant voltage power supply to the non-inverting input terminal of the differential amplifier, and level shift to amplify the voltage across the fixed resistor to a voltage at which the ground line voltage becomes zero level. Connect to an amplifier and set the output of this level shift amplifier to V/
A resistance period conversion oscillator that is connected to the input side of the F oscillator and obtains an oscillation output with a period proportional to the resistance value of the detection resistor is obtained.
第１図は、本考案の抵抗周期変換発振器の一実
施例を示す回路構成図である。
FIG. 1 is a circuit diagram showing an embodiment of the resistance period conversion oscillator of the present invention.
６は、測定量の検出用抵抗器である。例えば、
温度を測定する場合には、測温抵抗体を用いる。 6 is a resistor for detecting a measured quantity. for example,
When measuring temperature, a resistance temperature detector is used.
７は、検出用抵抗器６に直列に接続された固定
抵抗器である。負荷となる検出用抵抗器６と固定
抵抗器７の直列接続点は、差動増巾器１の反転入
力端子に接続されている。 7 is a fixed resistor connected in series to the detection resistor 6. A series connection point between the detection resistor 6 and the fixed resistor 7 serving as a load is connected to the inverting input terminal of the differential amplifier 1.
また差動増巾器１の非反転入力端子は、定電圧
電源２と接続されている。 Further, a non-inverting input terminal of the differential amplifier 1 is connected to a constant voltage power supply 2.
よつて、差動増巾器１の出力電流により、検出
用抵抗器６の両端に発生する電圧は、定電圧電源
２の電圧に等しく保たれる。 Therefore, the voltage generated across the detection resistor 6 by the output current of the differential amplifier 1 is kept equal to the voltage of the constant voltage power supply 2.
したがつて検出用抵抗器６と固定抵抗器７に流
れる電流は、検出用抵抗器６の抵抗値に逆比例し
た値になるので、固定抵抗器７の両端の電圧が、
検出用抵抗器６の抵抗に逆比例した電圧になる。 Therefore, the current flowing through the detection resistor 6 and the fixed resistor 7 is inversely proportional to the resistance value of the detection resistor 6, so the voltage across the fixed resistor 7 is
The voltage becomes inversely proportional to the resistance of the detection resistor 6.
固定抵抗器７の両端は、レベルシフト増巾器３
に接続されている。固定抵抗器７の両端電圧は、
前記レベルシフト増巾器３により増巾されて、ア
ース線を零レベルとした電圧として、出力され
る。 Both ends of the fixed resistor 7 are connected to a level shift amplifier 3.
It is connected to the. The voltage across the fixed resistor 7 is
The voltage is amplified by the level shift amplifier 3 and output as a voltage with the ground line at zero level.
出力された電圧は、Ｖ／Ｆ発振器４により、電
圧に比例した周波数に変換する。Ｖ／Ｆ発振器４
の入力は、検出用抵抗器６の抵抗値に逆比例した
電圧であることから、発振周波数は、検出用抵抗
器６の抵抗値に逆比例したものとなる。 The output voltage is converted by the V/F oscillator 4 into a frequency proportional to the voltage. V/F oscillator 4
Since the input is a voltage inversely proportional to the resistance value of the detection resistor 6, the oscillation frequency is inversely proportional to the resistance value of the detection resistor 6.
そして、出力端子５には、検出抵抗器６の抵抗
値に比例した周期の発振出力を出す抵抗周期変換
発振器を得ることができる。 Further, at the output terminal 5, a resistance period conversion oscillator can be obtained which outputs an oscillation output with a period proportional to the resistance value of the detection resistor 6.
本考案によつて、検出抵抗に正比例した周期を
有する発振をする発振器を得られ、信号処理の演
算を簡易化することができる
With the present invention, it is possible to obtain an oscillator that oscillates with a period directly proportional to the detection resistance, and it is possible to simplify signal processing operations.
第１図は本考案の抵抗周期変換発振器の一実施
例を示す回路構成図である。
１……差動増巾器、３……レベルシフト増巾
器、４……Ｖ／Ｆ発振器、６……検出用抵抗器、
７……固定抵抗器。
FIG. 1 is a circuit diagram showing an embodiment of the resistance period conversion oscillator of the present invention. 1...Differential amplifier, 3...Level shift amplifier, 4...V/F oscillator, 6...Detection resistor,
7...Fixed resistor.
Claims (1)
ものを差動増巾器の負荷として接線し、その２つ
の抵抗器の直列接続点を差動増巾器の反転入力端
子に接続し、前記差動増巾器の非反転入力端子に
定電圧電源を接続すると共に、前記固定抵抗器の
両端間の電圧をアース線電圧が零レベルとなる電
圧に増巾するレベルシフト増巾器に接続し、この
レベルシフト増巾器の出力をＶ／Ｆ発振器の入力
側に接続して、検出用抵抗器の抵抗値に比例した
周期の発振出力を得ることを特徴とする抵抗周期
変換発振器。 A detection resistor and a fixed resistor connected in series are connected tangentially as the load of the differential amplifier, and the series connection point of the two resistors is connected to the inverting input terminal of the differential amplifier. A constant voltage power supply is connected to the non-inverting input terminal of the differential amplifier, and the voltage across the fixed resistor is connected to a level shift amplifier that amplifies the voltage across the fixed resistor to a voltage at which the ground line voltage becomes zero level. A resistance period conversion oscillator characterized in that the output of the level shift amplifier is connected to the input side of a V/F oscillator to obtain an oscillation output with a period proportional to the resistance value of the detection resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6754184U JPS60179971U (en) | 1984-05-09 | 1984-05-09 | Resistance period conversion oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6754184U JPS60179971U (en) | 1984-05-09 | 1984-05-09 | Resistance period conversion oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60179971U JPS60179971U (en) | 1985-11-29 |
| JPH0521028Y2 true JPH0521028Y2 (en) | 1993-05-31 |
Family
ID=30601461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6754184U Granted JPS60179971U (en) | 1984-05-09 | 1984-05-09 | Resistance period conversion oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60179971U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5764766U (en) * | 1980-10-03 | 1982-04-17 |
-
1984
- 1984-05-09 JP JP6754184U patent/JPS60179971U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60179971U (en) | 1985-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4563634A (en) | Measuring and linearizing circuit device for a capacitive primary element | |
| US4109196A (en) | Resistance measuring circuit | |
| JPH0521028Y2 (en) | ||
| SU983469A2 (en) | Ultrasonic vibrometer | |
| JPH06324089A (en) | Output-signal formation device | |
| JPS6221958Y2 (en) | ||
| JPH0342527U (en) | ||
| JPS6135967Y2 (en) | ||
| JPH0279467U (en) | ||
| JPS5932905Y2 (en) | Eddy current thermometer | |
| JPH0432081U (en) | ||
| JPS5524686A (en) | Dc resistance measuring method | |
| JPH0624747Y2 (en) | Temperature / voltage conversion circuit | |
| SU1185063A1 (en) | Inductive measuring device | |
| JPS5748665A (en) | Resistance component measuring circuit | |
| RU1819350C (en) | Device for conductometric measurements | |
| JPS59113771U (en) | current measurement circuit | |
| JPH0239247Y2 (en) | ||
| JPH0326669Y2 (en) | ||
| JPS6143238Y2 (en) | ||
| JPS5920658Y2 (en) | Detection circuit for thermal conduction type vacuum gauge | |
| JPH0323553Y2 (en) | ||
| JPS58148945A (en) | Humidity detector | |
| JPH05264371A (en) | Voltage generator | |
| JPS61294321A (en) | Temperature detecting circuit |