JPH01173604U - - Google Patents
Info
- Publication number
- JPH01173604U JPH01173604U JP6899688U JP6899688U JPH01173604U JP H01173604 U JPH01173604 U JP H01173604U JP 6899688 U JP6899688 U JP 6899688U JP 6899688 U JP6899688 U JP 6899688U JP H01173604 U JPH01173604 U JP H01173604U
- Authority
- JP
- Japan
- Prior art keywords
- rod
- width
- dissimilar
- sensor head
- distance
- 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
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 2
- 150000002739 metals Chemical class 0.000 claims 2
- 238000009434 installation Methods 0.000 claims 1
- 239000003550 marker Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
第１図は本考案の実施例を示す図、第２図は本
考案の詳細説明図、第３図は本考案の信号出力説
明図、第４図は本考案の信号処理回路の説明図で
ある。第５図は従来例を示す図である。
１……油圧シリンダ、２……シリンダロツド、
３……油圧サーボ回路、４……ストロークコント
ローラ、５……リンク機構、６……ストロークセ
ンサ（外装型ストロークセンサ）ＬＶＤＴ、ポテ
ンシヨメータ、リニヤスケール等、７……位置検
出処理回路（ストロークセンサの信号処理部）、
８……センシングロツド、８―１……母材、８―
２……表面コート材、９……異種磁性金属、９―
１……異種磁性金属円周の一部分、９―２……異
種磁性金属円周全体、１０……センシングヘツド
、１０―１……差動コイル、１０―２……差動コ
イル、１１……センサヘツド出力、１１―１……
考案要件を満たした結果得られる信号ｓｉｎ波、
１１―２……考案要件を満たした結果得られる信
号ｃｏｓ波、１２……信号処理回路、１２―１…
…考案条件を満たした結果得られる特性式、１２
―２……考案条件を満たした結果得られる特性式
、１２―３……考案条件を満たすための信号処理
部の発振回路、１２―４……考案条件を満たすた
めの信号処理部のブリツジ回路、１２―５……考
案条件を満たすための信号処理部の位相解析回路
、１２―６……考案要件を満たすための信号処理
部の位置算定回路（ＣＰＵ）、Ｐ１，Ｐ２……油
圧シリンダにおける油圧、Ｓ……シリンダストロ
ーク、ｄ……油圧シリンダストロークの現在値、
Ｄ……制御目標値、Δｄ……Ｄとｄの偏差。
FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a detailed explanatory diagram of the present invention, FIG. 3 is an explanatory diagram of the signal output of the present invention, and FIG. 4 is an explanatory diagram of the signal processing circuit of the present invention. be. FIG. 5 is a diagram showing a conventional example. 1...Hydraulic cylinder, 2...Cylinder rod,
3... Hydraulic servo circuit, 4... Stroke controller, 5... Link mechanism, 6... Stroke sensor (external stroke sensor) LVDT, potentiometer, linear scale, etc., 7... Position detection processing circuit (stroke sensor signal processing section),
8... Sensing rod, 8-1... Base material, 8-
2...Surface coating material, 9...Different magnetic metal, 9-
DESCRIPTION OF SYMBOLS 1...Part of the circumference of a dissimilar magnetic metal, 9-2...The entire circumference of a dissimilar magnetic metal, 10...Sensing head, 10-1...Differential coil, 10-2...Differential coil, 11... Sensor head output, 11-1...
A signal sine wave obtained as a result of meeting the design requirements,
11-2...Signal cos wave obtained as a result of satisfying the design requirements, 12...Signal processing circuit, 12-1...
...Characteristic formula obtained as a result of satisfying the design conditions, 12
-2...characteristic equation obtained as a result of satisfying the design conditions, 12-3...oscillation circuit of the signal processing section to satisfy the design conditions, 12-4...bridge circuit of the signal processing section to satisfy the design conditions , 12-5... Phase analysis circuit of the signal processing section to satisfy the design requirements, 12-6... Position calculation circuit (CPU) of the signal processing section to meet the design requirements, P 1 , P 2 ... Hydraulic pressure Oil pressure in the cylinder, S... cylinder stroke, d... current value of hydraulic cylinder stroke,
D... Control target value, Δd... Deviation between D and d.
Claims (1)
金属をロツドに埋設したセンシングロツドとポジ
シヨンマーカとしての該異種磁性金属位置を渦電
流により検出するセンサヘツドと、該センサヘツ
ドからの信号を処理する信号処理回路からなる軸
ストローク検出器において (A) センシングロツドは、ロツドの長さ方向に
、一定幅ａの異種磁性金属を等間隔ｂで規則正し
く配置するとともにその間隔ｂを幅ａに等しくし
、 (B) センサヘツドは、２組の差動コイルで構成
し、差動コイルのコイル幅Ａを異種磁性金属の幅
ａの０．２倍とし、 差動コイルのコイル中心間距離Ｂを異種磁性金
属の幅ａに等しくし、 差動コイルの設置距離Ｃをコイルの中心間距離
Ｂの（２．５＋ｎ）倍とする（ｎ＝０，１，２，
３……） ことを具備することにより得られる位相情報によ
りロツドの変位を検出することを特徴とする渦電
流式ロツド変位センサ。[Claims for Utility Model Registration] A sensing rod in which a dissimilar metal with magnetic properties different from those of the rod base material is embedded in the rod, a sensor head that detects the position of the dissimilar magnetic metal as a position marker using eddy current, and In a shaft stroke detector consisting of a signal processing circuit that processes signals from a sensor head, (A) the sensing rod has dissimilar magnetic metals of a constant width a regularly arranged at equal intervals b in the length direction of the rod, and (B) The sensor head is composed of two sets of differential coils, and the coil width A of the differential coil is 0.2 times the width a of the dissimilar magnetic metal. The distance B between the centers is equal to the width a of the different magnetic metals, and the installation distance C of the differential coil is set to (2.5 + n) times the distance B between the centers of the coils (n = 0, 1, 2,
3...) An eddy current type rod displacement sensor is characterized in that the displacement of the rod is detected by phase information obtained by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6899688U JPH01173604U (en) | 1988-05-25 | 1988-05-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6899688U JPH01173604U (en) | 1988-05-25 | 1988-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01173604U true JPH01173604U (en) | 1989-12-08 |
Family
ID=31294289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6899688U Pending JPH01173604U (en) | 1988-05-25 | 1988-05-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01173604U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60170702A (en) * | 1984-02-16 | 1985-09-04 | S G:Kk | Linear position detector and manufacture of rod part of detector |
| JPS6295402A (en) * | 1985-10-21 | 1987-05-01 | Tokyo Keiso Kk | Rotational angle detector |
-
1988
- 1988-05-25 JP JP6899688U patent/JPH01173604U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60170702A (en) * | 1984-02-16 | 1985-09-04 | S G:Kk | Linear position detector and manufacture of rod part of detector |
| JPS6295402A (en) * | 1985-10-21 | 1987-05-01 | Tokyo Keiso Kk | Rotational angle detector |
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