JPH0485205U - - Google Patents
Info
- Publication number
- JPH0485205U JPH0485205U JP12899290U JP12899290U JPH0485205U JP H0485205 U JPH0485205 U JP H0485205U JP 12899290 U JP12899290 U JP 12899290U JP 12899290 U JP12899290 U JP 12899290U JP H0485205 U JPH0485205 U JP H0485205U
- Authority
- JP
- Japan
- Prior art keywords
- groove
- ceramic
- eddy current
- measuring coil
- displacement sensor
- 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 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims 3
- 230000005674 electromagnetic induction Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 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センサーの一実施
例の縦断面図、第２図は同上のボビンの斜視図、
第３図は同上の測定コイルの縦断面図、第４図は
ボビン及び金属線被覆材料の熱膨張係数の説明図
、第５図は接着剤の熱膨張係数の説明図である。
第６図は公知の渦電流型変位計の模式図、第７図
は従来のセンサーの縦断面図、第８図は同上の等
価回路図である。
１０……センサー、１１……ボビン、１２……
リング状溝、１３……測定コイル、１３ａ……金
属線、１４……接着剤、１５……リード線、１６
……アダプター、１７……インダクタンス、１８
……固有抵抗、１９……浮遊容量、２０……信号
処理回路部、３０……計測対象物体。
FIG. 1 is a longitudinal sectional view of an embodiment of the eddy current displacement sensor of the present invention, and FIG. 2 is a perspective view of the same bobbin.
FIG. 3 is a longitudinal sectional view of the same measuring coil as described above, FIG. 4 is an explanatory diagram of the thermal expansion coefficient of the bobbin and metal wire coating material, and FIG. 5 is an explanatory diagram of the thermal expansion coefficient of the adhesive.
FIG. 6 is a schematic diagram of a known eddy current displacement meter, FIG. 7 is a longitudinal sectional view of a conventional sensor, and FIG. 8 is an equivalent circuit diagram of the same. 10...sensor, 11...bobbin, 12...
Ring-shaped groove, 13...Measuring coil, 13a...Metal wire, 14...Adhesive, 15...Lead wire, 16
...Adapter, 17...Inductance, 18
... Specific resistance, 19 ... Stray capacitance, 20 ... Signal processing circuit section, 30 ... Measurement target object.
Claims (1)
電磁誘導により渦電流を発生させる変位センサー
において、外周にリング状溝を有する円筒状のセ
ラミツクス製ボビンと、上記溝内にセラミツクス
被覆の金属線が巻装されて形成された測定コイル
と、上記溝内の測定コイル外側に塗布され線膨張
率が上記セラミツクスとほぼ同等の無機系接着剤
とを具えたことを特徴とする渦電流型変位センサ
ー。 A displacement sensor that is placed facing an object to be measured and generates an eddy current in the object by electromagnetic induction uses a cylindrical ceramic bobbin with a ring-shaped groove on its outer periphery, and a ceramic-coated metal wire wound within the groove. An eddy current type displacement sensor comprising: a measuring coil formed in the groove; and an inorganic adhesive having a coefficient of linear expansion approximately equal to that of the ceramic, which is applied to the outside of the measuring coil in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12899290U JPH0485205U (en) | 1990-11-30 | 1990-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12899290U JPH0485205U (en) | 1990-11-30 | 1990-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0485205U true JPH0485205U (en) | 1992-07-24 |
Family
ID=31876423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12899290U Pending JPH0485205U (en) | 1990-11-30 | 1990-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0485205U (en) |
-
1990
- 1990-11-30 JP JP12899290U patent/JPH0485205U/ja active Pending
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