JPS61129142U - - Google Patents
Info
- Publication number
- JPS61129142U JPS61129142U JP1227185U JP1227185U JPS61129142U JP S61129142 U JPS61129142 U JP S61129142U JP 1227185 U JP1227185 U JP 1227185U JP 1227185 U JP1227185 U JP 1227185U JP S61129142 U JPS61129142 U JP S61129142U
- Authority
- JP
- Japan
- Prior art keywords
- utility
- oscillation circuit
- model registration
- measuring device
- measuring
- 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
- 239000013078 crystal Substances 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Description
第１図は本考案の第１の実施例を示す回路図、
第２図は第１図における各部の電圧波形を示す図
、第３図は本考案の第２の実施例を示す回路図、
第４図は第３図における各部の電圧波形を示す図
、第５図は第１図における第２の増幅器Ａ２の出
力および第３図の第２の増幅器Ａ１２の出力をそ
れぞれ直流電圧に変換した電圧Ｖｐ（）とその
ときの圧力Ｐ（ＴＯＲＲ）との関係を示すグラフ
である。
Ａ１，Ａ２，Ａ１１，Ａ１２……増幅器、Ｒ１
，Ｒ２，Ｒ３，Ｒ１１，Ｒ１２……抵抗、Ｘ１，
Ｘ１１……水晶振動子、Ｃ１，Ｃ１１……コンデ
ンサ、Ｄ１，Ｄ２……ダイオード、Ｉ１，Ｉ１１
，Ｉ１２……インバータ、Ｓ……アナログスイツ
チ、Ｓ１，Ｓ２……接点。
FIG. 1 is a circuit diagram showing a first embodiment of the present invention;
FIG. 2 is a diagram showing voltage waveforms at various parts in FIG. 1, FIG. 3 is a circuit diagram showing a second embodiment of the present invention,
Figure 4 is a diagram showing the voltage waveforms of each part in Figure 3, and Figure 5 is a diagram showing the output of the second amplifier A2 in Figure 1 and the output of the second amplifier A12 in Figure 3, respectively, as DC voltages. It is a graph showing the relationship between the converted voltage Vp() and the pressure P(TORR) at that time. A 1 , A 2 , A 11 , A 12 ...Amplifier, R 1
, R 2 , R 3 , R 11 , R 12 ...resistance, X 1 ,
X 11 ... Crystal resonator, C 1 , C 11 ... Capacitor, D 1 , D 2 ... Diode, I 1 , I 11
, I 12 ... Inverter, S ... Analog switch, S 1 , S 2 ... Contact.
Claims (1)
晶振動子のインピーダンス変化を測定する手段を
設けたことを特徴とする圧力測定装置。 (2) 実用新案登録請求の範囲第(1)項において、
前記インピーダンス変化を測定する手段は、前記
発振回路において、水晶振動子と直列に結合され
た抵抗と、この抵抗の両端に生じた電圧を検出す
る手段とからなるものであることを特徴とする圧
力測定装置。 (3) 実用新案登録請求の範囲第(1)項において、
前記インピーダンス変化を測定する手段は、前記
発振回路において、前記水晶振動子のインピーダ
ンス変化に対応してその出力が変化する能動素子
を該水晶振子に接続したことを特徴とする圧力測
定装置。[Claims for Utility Model Registration] (1) A pressure measuring device characterized in that a self-excited oscillation circuit using a crystal oscillator is provided with means for measuring impedance changes of the crystal oscillator. (2) In paragraph (1) of claims for utility model registration,
The means for measuring the impedance change comprises a resistor coupled in series with a crystal resonator in the oscillation circuit, and means for detecting a voltage generated across the resistor. measuring device. (3) In paragraph (1) of claims for utility model registration,
A pressure measuring device characterized in that the means for measuring the impedance change comprises, in the oscillation circuit, an active element whose output changes in response to an impedance change of the crystal oscillator connected to the crystal pendulum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985012271U JPH0720579Y2 (en) | 1985-01-30 | 1985-01-30 | Pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985012271U JPH0720579Y2 (en) | 1985-01-30 | 1985-01-30 | Pressure measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61129142U true JPS61129142U (en) | 1986-08-13 |
| JPH0720579Y2 JPH0720579Y2 (en) | 1995-05-15 |
Family
ID=30495174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985012271U Expired - Lifetime JPH0720579Y2 (en) | 1985-01-30 | 1985-01-30 | Pressure measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720579Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5658632A (en) * | 1979-10-18 | 1981-05-21 | Seikosha Co Ltd | Pressure detecting device |
| JPS5935122A (en) * | 1982-08-23 | 1984-02-25 | Toyo Commun Equip Co Ltd | Pressure sensor for gas |
-
1985
- 1985-01-30 JP JP1985012271U patent/JPH0720579Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5658632A (en) * | 1979-10-18 | 1981-05-21 | Seikosha Co Ltd | Pressure detecting device |
| JPS5935122A (en) * | 1982-08-23 | 1984-02-25 | Toyo Commun Equip Co Ltd | Pressure sensor for gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0720579Y2 (en) | 1995-05-15 |