JPH01126530U - - Google Patents
Info
- Publication number
- JPH01126530U JPH01126530U JP2270088U JP2270088U JPH01126530U JP H01126530 U JPH01126530 U JP H01126530U JP 2270088 U JP2270088 U JP 2270088U JP 2270088 U JP2270088 U JP 2270088U JP H01126530 U JPH01126530 U JP H01126530U
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- liquid
- protection tube
- piezoelectric
- level sensor
- 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
- 239000007788 liquid Substances 0.000 claims 5
- 239000002184 metal Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
第１図は本考案のレベルセンサーＳの縦断側面
図、第２図は取付け状態の縦断側面図、第３図は
出力特性の比較グラフ、第４図は他の環状底面６
の実施例を示す保護管１の一部の縦断側面図、第
５図は従来構成の欠点を示す保護管ａの一部の縦
断側面図である。
１，２０……保護管、２……拡径部、３……鍔
、４……端板、６……環状底面、８……振動板、
９……圧電素子。
Fig. 1 is a longitudinal side view of the level sensor S of the present invention, Fig. 2 is a longitudinal side view of the installed state, Fig. 3 is a comparison graph of output characteristics, and Fig. 4 is another annular bottom surface 6.
FIG. 5 is a vertical sectional side view of a portion of the protective tube a showing the disadvantages of the conventional structure. DESCRIPTION OF SYMBOLS 1, 20... Protection tube, 2... Expanded diameter part, 3... Tsuba, 4... End plate, 6... Annular bottom surface, 8... Vibration plate,
9...Piezoelectric element.
Claims (1)
せて振動板を液密状に接合し、前記振動板の内面
に圧電素子を貼着してバイモルフ型の液体感知部
を構成し、前記振動板の露出外面が液体と非接触
の時に前記圧電素子を振動させて、液体の有無を
検出する圧電式液体レベルセンサーにおいて、 前記保護管の下端内周縁に環状底面を配し、前
記振動板の周縁を、環状底面にほぼ面一状に接合
したことを特徴とする圧電式液体レベルセンサー
。[Claims for Utility Model Registration] A diaphragm is liquid-tightly bonded to the lower end opening of a metal protection tube with one side exposed to the outside, and a piezoelectric element is pasted on the inner surface of the diaphragm to create a bimorph liquid. In a piezoelectric liquid level sensor that constitutes a sensing part and detects the presence or absence of liquid by vibrating the piezoelectric element when the exposed outer surface of the diaphragm is not in contact with the liquid, the protection tube has an annular bottom surface on the inner periphery of the lower end of the protection tube. A piezoelectric liquid level sensor, characterized in that the periphery of the diaphragm is joined to the annular bottom surface substantially flush with the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2270088U JPH01126530U (en) | 1988-02-22 | 1988-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2270088U JPH01126530U (en) | 1988-02-22 | 1988-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01126530U true JPH01126530U (en) | 1989-08-29 |
Family
ID=31241046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2270088U Pending JPH01126530U (en) | 1988-02-22 | 1988-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01126530U (en) |
-
1988
- 1988-02-22 JP JP2270088U patent/JPH01126530U/ja active Pending
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