JPH0355584U - - Google Patents
Info
- Publication number
- JPH0355584U JPH0355584U JP11563889U JP11563889U JPH0355584U JP H0355584 U JPH0355584 U JP H0355584U JP 11563889 U JP11563889 U JP 11563889U JP 11563889 U JP11563889 U JP 11563889U JP H0355584 U JPH0355584 U JP H0355584U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- oscillation circuit
- detection coil
- oscillation
- proximity
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
第１図および第２図は本考案の一実施例を示し
、第１図は全体のブロツク図、第２図は２種の材
質についてのインダクタンス変化特性図、第３図
は検出物体との距離に関する検出コイルのインダ
クタンス変化特性図、第４図は磁性材（鉄）につ
いての周波数とインダクタンス変化との関係を示
すインダクタンス変化特性図、第５図は非磁性材
（アルミ）についての周波数とインダクタンス変
化との関係を示すインダクタンス変化特性図であ
る。
図面中、１……発振回路、２……検出コイル、
４……周波数比較回路（判断手段）である。
Fig. 1 and Fig. 2 show an embodiment of the present invention, Fig. 1 is an overall block diagram, Fig. 2 is an inductance change characteristic diagram for two types of materials, and Fig. 3 is a distance to a detection object. Fig. 4 is an inductance change characteristic diagram showing the relationship between frequency and inductance change for magnetic material (iron), and Fig. 5 is a diagram showing frequency and inductance change for non-magnetic material (aluminum). FIG. 3 is an inductance change characteristic diagram showing the relationship between In the drawings, 1... oscillation circuit, 2... detection coil,
4...Frequency comparison circuit (judgment means).
Claims (1)
の発振回路における発振周波数の変化に基づき前
記検出コイルへの検出物体の近傍を検出する判断
手段とを備え、前記発振回路における発振周波数
を１０〜３０ＫＨＺの範囲内のいずれかの周波数
に設定したことを特徴とする近傍センサ。 An oscillation circuit that causes a high-frequency current to flow through a detection coil, and a determination means that detects the proximity of a detection object to the detection coil based on a change in the oscillation frequency in the oscillation circuit, A proximity sensor characterized in that it is set to any frequency within a range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989115638U JPH0734387Y2 (en) | 1989-09-30 | 1989-09-30 | Proximity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989115638U JPH0734387Y2 (en) | 1989-09-30 | 1989-09-30 | Proximity sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0355584U true JPH0355584U (en) | 1991-05-29 |
| JPH0734387Y2 JPH0734387Y2 (en) | 1995-08-02 |
Family
ID=31663959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989115638U Expired - Lifetime JPH0734387Y2 (en) | 1989-09-30 | 1989-09-30 | Proximity sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734387Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2537144B (en) | 2015-04-09 | 2019-11-13 | Glen Hastie Nugent David | Method of dyeing fabric using microorganisms |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4821919U (en) * | 1971-07-21 | 1973-03-13 | ||
| JPS6242087U (en) * | 1986-08-21 | 1987-03-13 |
-
1989
- 1989-09-30 JP JP1989115638U patent/JPH0734387Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4821919U (en) * | 1971-07-21 | 1973-03-13 | ||
| JPS6242087U (en) * | 1986-08-21 | 1987-03-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0734387Y2 (en) | 1995-08-02 |
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