JPH022606U - - Google Patents
Info
- Publication number
- JPH022606U JPH022606U JP8028188U JP8028188U JPH022606U JP H022606 U JPH022606 U JP H022606U JP 8028188 U JP8028188 U JP 8028188U JP 8028188 U JP8028188 U JP 8028188U JP H022606 U JPH022606 U JP H022606U
- Authority
- JP
- Japan
- Prior art keywords
- fluid pressure
- pressure cylinder
- piston rod
- scale
- appearing
- 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
- 230000005291 magnetic effect Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Actuator (AREA)
Description
第１図は、本考案によるストローク検出機能を
有する流体圧シリンダにおける強磁性体鉄心と磁
気センサの位置関係を示す断面図である。第２図
は、前記磁気センサの磁気抵抗素子の接続例を示
す回路図である。第３図は、前記回路の出力特性
を示すグラフである。第４図は、ストローク検出
機能を有する流体圧シリンダの実施例の断面図で
ある。第５図は、前記ピストンロツドを拡大し一
部破断して示した図である。第６図は、従来の流
体圧シリンダにおける強磁性体鉄心と磁気センサ
の位置関係を示す断面図である。第７図は、前記
従来の流体圧シリンダにおける磁気センサの磁気
抵抗素子の接続例を示す回路図である。
１…磁気センサ、ＳＭ…センサの磁石、Ａ１，
Ａ２，Ｂ１，Ｂ２，Ｃ１，Ｃ２，Ｄ１，Ｄ２…磁
気センサの磁気抵抗素子、１０…シリンダロツド
、１０ａ…シリンダロツドの表面硬化層、１１…
強磁性体鉄心、１２…環状非磁性体、１３ａ，１
３ｂ…ポート、１５…センサハウジング、１６…
パツキング、１７…増幅および波形成形回路、１
８…信号ケーブル、１９…センサ収容室、１０１
…ピストン、１０２…シリンダ。
FIG. 1 is a sectional view showing the positional relationship between a ferromagnetic core and a magnetic sensor in a fluid pressure cylinder having a stroke detection function according to the present invention. FIG. 2 is a circuit diagram showing a connection example of the magnetoresistive element of the magnetic sensor. FIG. 3 is a graph showing the output characteristics of the circuit. FIG. 4 is a cross-sectional view of an embodiment of a hydraulic cylinder with a stroke detection function. FIG. 5 is an enlarged and partially cutaway view of the piston rod. FIG. 6 is a cross-sectional view showing the positional relationship between a ferromagnetic core and a magnetic sensor in a conventional fluid pressure cylinder. FIG. 7 is a circuit diagram showing an example of the connection of the magnetoresistive element of the magnetic sensor in the conventional fluid pressure cylinder. 1... Magnetic sensor, SM... Sensor magnet, A 1 ,
A 2 , B 1 , B 2 , C 1 , C 2 , D 1 , D 2 ... magnetoresistive element of magnetic sensor, 10... cylinder rod, 10a... hardened surface layer of cylinder rod, 11...
Ferromagnetic core, 12... Annular nonmagnetic material, 13a, 1
3b...Port, 15...Sensor housing, 16...
Packing, 17...Amplification and waveform shaping circuit, 1
8...Signal cable, 19...Sensor storage chamber, 101
...Piston, 102...Cylinder.
Claims (1)
気特性を有する素材のスケールを設け、磁気セン
サにより前記スケールの移動を検出してピストン
ロツドの移動量を検出するストローク検出装置を
有する流体圧シリンダにおいて、前記磁気センサ
を形成する磁気抵抗素子４個Ａ１，Ａ２，Ｂ１，
Ｂ２をこの順に前記ピストンロツドに沿いスケー
ルの１／２ピツチで配列し、磁気抵抗素子Ａ１と
Ａ２，Ｂ１とＢ２をそれぞれ直列に接続しＡ１と
Ｂ２の接続点とＡ２とＢ１の接続点を電源に接続
し、Ａ１とＡ２の接続点に現れる電圧ＶαとＢ１
とＢ２の接続点に現れる電圧Ｖβの差の電圧を取
り出す回路を構成したことを特徴とするストロー
ク検出機能を有する流体圧シリンダ。 In a fluid pressure cylinder, a piston rod is provided with a scale made of a material having magnetic properties different from that of the material of the rod, and the fluid pressure cylinder has a stroke detection device that detects movement of the scale with a magnetic sensor to detect the amount of movement of the piston rod. Four magnetoresistive elements A 1 , A 2 , B 1 ,
B 2 are arranged in this order along the piston rod at 1/2 pitch of the scale, and the magnetic resistance elements A 1 and A 2 and B 1 and B 2 are connected in series, and the connecting point of A 1 and B 2 and A 2 are connected in series. and B1 are connected to the power supply, and the voltages Vα and B1 appearing at the connection point of A1 and A2 are
1. A fluid pressure cylinder having a stroke detection function, characterized in that a circuit is configured to take out the voltage difference between the voltage Vβ appearing at the connection point between B and B2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8028188U JPH022606U (en) | 1988-06-17 | 1988-06-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8028188U JPH022606U (en) | 1988-06-17 | 1988-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH022606U true JPH022606U (en) | 1990-01-09 |
Family
ID=31305113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8028188U Pending JPH022606U (en) | 1988-06-17 | 1988-06-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH022606U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58222772A (en) * | 1982-06-18 | 1983-12-24 | Nec Corp | Position detector for linear pulse motor |
| JPS5923609B2 (en) * | 1982-04-09 | 1984-06-04 | 浜松テレビ株式会社 | Secondary electron multiplier |
-
1988
- 1988-06-17 JP JP8028188U patent/JPH022606U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5923609B2 (en) * | 1982-04-09 | 1984-06-04 | 浜松テレビ株式会社 | Secondary electron multiplier |
| JPS58222772A (en) * | 1982-06-18 | 1983-12-24 | Nec Corp | Position detector for linear pulse motor |
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