JPH02133604U - - Google Patents
Info
- Publication number
- JPH02133604U JPH02133604U JP4333789U JP4333789U JPH02133604U JP H02133604 U JPH02133604 U JP H02133604U JP 4333789 U JP4333789 U JP 4333789U JP 4333789 U JP4333789 U JP 4333789U JP H02133604 U JPH02133604 U JP H02133604U
- Authority
- JP
- Japan
- Prior art keywords
- eddy current
- sensor
- measuring coil
- ring groove
- measured
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000005674 electromagnetic induction Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
第１図は本考案渦電流型変位計の一実施例にお
けるセンサー部の縦断面図、第２図は同上センサ
ー部の取付体に設置する態様の縦断面図、第３図
は同上センサー部のＤ２／Ｄ１のセンサー感度に
対する特性の線図、第４図は同じくＤ２／Ｄ１の
測定可能距離に対する特性の線図である。第５図
は公知の渦電流型変位計の模式図、第６図は同上
のセンサー部の縦断面図、第７図は同上の信号処
理部の回路図、第８図、第９図はそれぞれ従来の
センサー部取付け態様の縦断面図、第１０図は従
来取付け態様における変位計特性の線図、第１１
図は同上における磁束状態の説明図、第１２図、
第１３図及び第１４図はそれぞれ従来の上記とは
異なるセンサー部取付け態様の縦断面図である。
１０……センサー部、１１……ボビン、１２…
…リング溝、１３……測定コイル、１４……接着
剤、１５……リード線、２０……信号処理部、３
０……測定対象物、４０ａ……磁性材取付体、４
１……取付穴、４２……接着剤。
Fig. 1 is a longitudinal cross-sectional view of the sensor part in an embodiment of the eddy current displacement meter of the present invention, Fig. 2 is a longitudinal cross-sectional view of the sensor part installed in the mounting body of the same sensor part, and Fig. 3 is a longitudinal cross-sectional view of the sensor part of the above sensor part. FIG. 4 is a diagram of the characteristic of D 2 /D 1 with respect to the sensor sensitivity, and FIG. 4 is a diagram of the characteristic of D 2 /D 1 with respect to the measurable distance. Fig. 5 is a schematic diagram of a known eddy current type displacement meter, Fig. 6 is a vertical cross-sectional view of the sensor section of the same as above, Fig. 7 is a circuit diagram of the signal processing section of the same as above, and Fig. 8 and Fig. 9 are respectively FIG. 10 is a vertical cross-sectional view of the conventional sensor unit mounting mode, and FIG. 11 is a diagram of displacement meter characteristics in the conventional mounting mode.
The figure is an explanatory diagram of the magnetic flux state in the same as above, Fig. 12,
FIGS. 13 and 14 are longitudinal cross-sectional views of a conventional sensor unit mounting manner different from the above. 10...sensor part, 11...bobbin, 12...
...Ring groove, 13...Measuring coil, 14...Adhesive, 15...Lead wire, 20...Signal processing unit, 3
0...Measurement object, 40a...Magnetic material attachment body, 4
1...Mounting hole, 42...Adhesive.
Claims (1)
円筒状ボビンが測定対象物に対向配置され同測定
対象物に電磁誘導により渦電流を発生させるセン
サー部と、上記センサー部の測定コイル両端をブ
リツジ回路の一辺に接続し上記センサー部と上記
測定対象物との距離に応じ上記渦電流による同セ
ンサー部のインピーダンス変化を電圧変化として
取出す信号処理部とからなる渦電流型変位計にお
いて、上記センサー部のボビンのリング溝に巻装
された測定コイルの外径Ｄ１とボビンの外径Ｄ２
との比Ｄ２／Ｄ１を１．５以上とし、かつ上記測
定コイル外側のリング溝空隙にコイル固着用接着
剤を充填したことを特徴とする渦電流型変位計。 A cylindrical bobbin with a measuring coil wound around a ring groove of an appropriate depth is placed facing the object to be measured, and a sensor part generates an eddy current in the object by electromagnetic induction, and both ends of the measuring coil of the sensor part are arranged opposite to the object to be measured. In the eddy current type displacement meter, the sensor comprises a signal processing section connected to one side of the bridge circuit and extracting an impedance change of the sensor section due to the eddy current as a voltage change according to the distance between the sensor section and the object to be measured. The outer diameter D1 of the measuring coil wound in the ring groove of the bobbin and the outer diameter D2 of the bobbin
An eddy current type displacement meter, characterized in that the ratio D 2 /D 1 is 1.5 or more, and the ring groove gap outside the measuring coil is filled with an adhesive for fixing the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4333789U JPH02133604U (en) | 1989-04-13 | 1989-04-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4333789U JPH02133604U (en) | 1989-04-13 | 1989-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02133604U true JPH02133604U (en) | 1990-11-06 |
Family
ID=31555668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4333789U Pending JPH02133604U (en) | 1989-04-13 | 1989-04-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02133604U (en) |
-
1989
- 1989-04-13 JP JP4333789U patent/JPH02133604U/ja active Pending
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