JPS61125722U - - Google Patents
Info
- Publication number
- JPS61125722U JPS61125722U JP979985U JP979985U JPS61125722U JP S61125722 U JPS61125722 U JP S61125722U JP 979985 U JP979985 U JP 979985U JP 979985 U JP979985 U JP 979985U JP S61125722 U JPS61125722 U JP S61125722U
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- piezoelectric
- level sensor
- liquid level
- diaphragm
- 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
- 239000000463 material Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 8
- 239000007799 cork Substances 0.000 claims 1
- 239000006261 foam material Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
Description
第1図イ、ロは共振周波数f―利得dBと温度
との関係を示すグラフ、第2図は本考案のレベル
センサーSの縦断側面図、第3図は他の実施例を
示す要部の縦断側面図、第4図はタンク17への
取付けを示す縦断側面図、第5図は前記実施例の
出力電圧と温度との関係を示すグラフである。
1…保護管、2…振動板、3…圧電素子、10
…ダンパ材。
Figures 1A and 2B are graphs showing the relationship between resonance frequency f - gain dB and temperature, Figure 2 is a vertical side view of the level sensor S of the present invention, and Figure 3 is a main part showing another embodiment. FIG. 4 is a longitudinal side view showing the attachment to the tank 17, and FIG. 5 is a graph showing the relationship between the output voltage and temperature of the embodiment. 1... Protection tube, 2... Vibration plate, 3... Piezoelectric element, 10
...damper material.
Claims (1)
出さ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
、前記振動板の板面にダンパー材を被着したこと
を特徴とする圧電式液体レベルセンサー。 (2) 前記ダンパ材を、スポンジ、コルク、ゴム
、発泡プラスチツク等の不連続気泡を有する発泡
材としたことを特徴とする実用新案登録請求の範
囲第(1)項記載の圧電式液体レベルセンサー。[Claims for Utility Model Registration] (1) 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 form a bimorph. In a piezoelectric liquid level sensor that constitutes a type of liquid sensing section 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 piezoelectric liquid level sensor detects the presence or absence of liquid. A piezoelectric liquid level sensor that is coated with a damper material. (2) The piezoelectric liquid level sensor according to claim 1, wherein the damper material is a foam material having discontinuous cells such as sponge, cork, rubber, or foamed plastic. .
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP979985U JPS61125722U (en) | 1985-01-26 | 1985-01-26 | |
US06/803,555 US4703652A (en) | 1984-12-01 | 1985-12-02 | Piezoelectric type liquid level sensor and fabricating method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP979985U JPS61125722U (en) | 1985-01-26 | 1985-01-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61125722U true JPS61125722U (en) | 1986-08-07 |
Family
ID=30490361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP979985U Pending JPS61125722U (en) | 1984-12-01 | 1985-01-26 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61125722U (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5132274B1 (en) * | 1970-09-19 | 1976-09-11 |
-
1985
- 1985-01-26 JP JP979985U patent/JPS61125722U/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5132274B1 (en) * | 1970-09-19 | 1976-09-11 |