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
- Actuator (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (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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