JPH0184004U - - Google Patents
Info
- Publication number
- JPH0184004U JPH0184004U JP1987179588U JP17958887U JPH0184004U JP H0184004 U JPH0184004 U JP H0184004U JP 1987179588 U JP1987179588 U JP 1987179588U JP 17958887 U JP17958887 U JP 17958887U JP H0184004 U JPH0184004 U JP H0184004U
- Authority
- JP
- Japan
- Prior art keywords
- positive feedback
- detection coil
- operational amplifier
- coil
- feedback circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
第１図は本考案による位置検出器の一実施例を
示す回路図、第２図は従来の位置検出器の構成の
一例を示す回路図である。
１０……位置検出器、１１……演算増幅器、１
２……検出用コイル、１３……基準コイル、１４
……正帰環回路、１５……正弦波発振器、１６…
…被検出体、Ｂ……磁束。
FIG. 1 is a circuit diagram showing an embodiment of a position detector according to the present invention, and FIG. 2 is a circuit diagram showing an example of the configuration of a conventional position detector. 10... Position detector, 11... Operational amplifier, 1
2...Detection coil, 13...Reference coil, 14
...Positive feedback circuit, 15...Sine wave oscillator, 16...
...Object to be detected, B...Magnetic flux.
Claims (1)
た検出用コイルと該演算増幅器に正帰環を与える
ための基準コイルとを含んで成る正帰環回路と、
該正帰環回路に所定の周波数の信号を与える発振
器とを備え、導電性を有する被検出体と前記検出
用コイルとの間の距離に従つたレベルの出力信号
を前記正帰環回路から出力しうるようにした位置
検出器において、前記基準コイルの発生磁束が前
記検出用コイルの発生磁束と同一位相で前記被検
出体に作用するように前記基準コイルを前記検出
用コイルと直列に近接配置したことを特徴とする
位置検出器。 a positive feedback circuit comprising an operational amplifier, a detection coil provided on the input side of the operational amplifier, and a reference coil for providing a positive feedback to the operational amplifier;
an oscillator that provides a signal of a predetermined frequency to the positive feedback circuit, and outputs an output signal from the positive feedback circuit at a level according to the distance between the conductive object to be detected and the detection coil. In the position detector, the reference coil is arranged in series and close to the detection coil so that the magnetic flux generated by the reference coil acts on the detected object in the same phase as the magnetic flux generated by the detection coil. A position detector characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987179588U JPH0184004U (en) | 1987-11-27 | 1987-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987179588U JPH0184004U (en) | 1987-11-27 | 1987-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0184004U true JPH0184004U (en) | 1989-06-05 |
Family
ID=31471135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987179588U Pending JPH0184004U (en) | 1987-11-27 | 1987-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0184004U (en) |
-
1987
- 1987-11-27 JP JP1987179588U patent/JPH0184004U/ja active Pending
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