JPS61174629U - - Google Patents
Info
- Publication number
- JPS61174629U JPS61174629U JP5738985U JP5738985U JPS61174629U JP S61174629 U JPS61174629 U JP S61174629U JP 5738985 U JP5738985 U JP 5738985U JP 5738985 U JP5738985 U JP 5738985U JP S61174629 U JPS61174629 U JP S61174629U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- liquid level
- excitation coil
- winding density
- middle point
- 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
- 239000007788 liquid Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005284 excitation Effects 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims 5
- 230000004907 flux Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Level Indicators Using A Float (AREA)
Description
第１図はこの考案にかかる液面検出装置の第１
実施例を示す回路図、第２図は同じくその誘導型
液面センサの縦断面図、第３図は第１図回路中の
各点の波形図、第４図は同じくその誘導型液面セ
ンサの出力特性図、第５図は第２実施例を示す要
部回路図、第６図は第３実施例における誘導型液
面センサを示す縦断面図、第７図は従来の液面検
出装置を示す概略構成図である。
１１……第１の交流信号源、１２……第２の交
流信号源、１３……誘導型液面センサ、１３２…
…主励磁コイル、１３４……副励磁コイル、１３
６……検出コイル、１３８，１３８′……シヨー
トリング、１３２１，１３４１……上部コイル、
１３２２，１３４２……下部コイル。
Figure 1 shows the first part of the liquid level detection device according to this invention.
A circuit diagram showing an embodiment, FIG. 2 is a vertical cross-sectional view of the same inductive type liquid level sensor, FIG. 3 is a waveform diagram at each point in the circuit of FIG. 1, and FIG. 4 is also the same inductive type liquid level sensor. Fig. 5 is a main circuit diagram showing the second embodiment, Fig. 6 is a vertical cross-sectional view showing the inductive liquid level sensor in the third embodiment, and Fig. 7 is a conventional liquid level detection device. FIG. DESCRIPTION OF SYMBOLS 11...First AC signal source, 12...Second AC signal source, 13...Inductive liquid level sensor, 132...
...Main excitation coil, 134...Subexcitation coil, 13
6...Detection coil, 138, 138'...Shot ring, 1321, 1341...Upper coil,
1322, 1342...lower coil.
Claims (1)
つて巻回密度が密から疎になるように形成された
上部コイル１３２１と前記中間点から下方に向つ
て巻回密度が疎から密になりかつ前記上部コイル
１３２１とは逆方向の磁束を発生するように形成
された下部コイル１３２２との直列体又は並列体
からなり、液面位検出範囲全体に亘つて設けられ
た主励磁コイル１３２と、液面位の変化方向に沿
つて上方から中間点に向つて巻回密度が密から疎
になるように形成された上部コイル１３４１と前
記中間点から下方に向つて巻回密度が疎から密に
なりかつ前記上部コイル１３４１とは逆方向の磁
束を発生するように形成された下部コイル１３４
２との直列体又は並列体からなり、液面位検出範
囲の下部範囲に対して設けられた副励磁コイル１
３４と、前記主励磁コイル１３２及び副励磁コイ
ル１３４に磁気結合され、かつ略均一な巻回密度
に形成された検出コイル１３６と、前記主励磁コ
イル１３２及び副励磁コイル１３４のコイル軸又
は前記検出コイル１３６のコイル軸に対して同軸
的に配設され、かつ液面位に応じて上下動するシ
ヨートリング１３８，１３８′とからなる誘導型
液面センサ１３を備え、前記主励磁コイル１３２
に第１の交流信号源１１を接続すると共に、前記
副励磁コイル１３４に前記第１の交流信号源１１
と周波数の異なる第２の交流信号源１２を接続す
ることにより、前記検出コイル１３６から得られ
る誘導起電力に基づいて液面位を検出してなるこ
とを特徴とする液面検出装置。 The upper coil 1321 is formed so that the winding density becomes thinner to sparser from above toward the middle point along the direction of change in the liquid level, and the winding density becomes thinner from sparse toward the bottom from the middle point. The main excitation coil 132 is formed in series or in parallel with a lower coil 1322 formed to generate magnetic flux in the opposite direction to the upper coil 1321, and is provided over the entire liquid level detection range. , an upper coil 1341 formed such that the winding density becomes sparse from above toward the middle point along the direction of change in the liquid level, and a winding density from sparse to dense from the middle point downward. and a lower coil 134 formed to generate magnetic flux in a direction opposite to that of the upper coil 1341.
A sub-excitation coil 1 is formed in series or in parallel with 2 and is provided for the lower range of the liquid level detection range.
34, a detection coil 136 magnetically coupled to the main excitation coil 132 and the sub-excitation coil 134 and formed with substantially uniform winding density, and a coil axis of the main excitation coil 132 and the sub-excitation coil 134 or the detection coil 136. The main excitation coil 132 includes an inductive liquid level sensor 13 consisting of shot rings 138 and 138' that are disposed coaxially with the coil axis of the coil 136 and move up and down according to the liquid level.
The first AC signal source 11 is connected to the auxiliary excitation coil 134, and the first AC signal source 11 is connected to the
A liquid level detection device characterized in that the liquid level is detected based on the induced electromotive force obtained from the detection coil 136 by connecting a second alternating current signal source 12 having a different frequency.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5738985U JPH0240501Y2 (en) | 1985-04-19 | 1985-04-19 | |
| US06/845,537 US4723446A (en) | 1985-04-04 | 1986-03-28 | Device for measuring displacement |
| EP86104604A EP0211142B1 (en) | 1985-04-04 | 1986-04-04 | Device for measuring displacement |
| DE8686104604T DE3680839D1 (en) | 1985-04-04 | 1986-04-04 | DEVICE FOR MEASURING SHIFTING. |
| US07/123,800 US4833919A (en) | 1985-04-04 | 1987-11-23 | Device for measuring displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5738985U JPH0240501Y2 (en) | 1985-04-19 | 1985-04-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61174629U true JPS61174629U (en) | 1986-10-30 |
| JPH0240501Y2 JPH0240501Y2 (en) | 1990-10-29 |
Family
ID=30581869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5738985U Expired JPH0240501Y2 (en) | 1985-04-04 | 1985-04-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0240501Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007017326A (en) * | 2005-07-08 | 2007-01-25 | Siemens Kk | Position detection method for highly precisely positioning self-running mobile object and mechanism thereof |
-
1985
- 1985-04-19 JP JP5738985U patent/JPH0240501Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007017326A (en) * | 2005-07-08 | 2007-01-25 | Siemens Kk | Position detection method for highly precisely positioning self-running mobile object and mechanism thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0240501Y2 (en) | 1990-10-29 |
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