JPS61175538A - Pressure detector - Google Patents

Pressure detector

Info

Publication number
JPS61175538A
JPS61175538A JP60017199A JP1719985A JPS61175538A JP S61175538 A JPS61175538 A JP S61175538A JP 60017199 A JP60017199 A JP 60017199A JP 1719985 A JP1719985 A JP 1719985A JP S61175538 A JPS61175538 A JP S61175538A
Authority
JP
Japan
Prior art keywords
pressure
receiving element
pressure receiving
case
temperature
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
Application number
JP60017199A
Other languages
Japanese (ja)
Inventor
Akito Fukui
章人 福井
Shunichi Murazaki
村崎 俊一
Muneo Yorinaga
宗男 頼永
Kiyoshi Saeki
佐伯 清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
NipponDenso Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP60017199A priority Critical patent/JPS61175538A/en
Publication of JPS61175538A publication Critical patent/JPS61175538A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0005Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in capacitance

Abstract

PURPOSE:To enable the application in a wide temperature range, by forming a pressure receiving element and a temperature compensation element from an electrostrictive element having the same temperature coefficient to elevate the stability of the output with respect to changes in the ambient temperature. CONSTITUTION:A pressure receiving element 1 comprises an electrostrictive element having an electrostrictive effect. A temperature compensation element 2 has the same temperature characteristic with the same material and construction as the pressure receiving element 1. On the other hand, the pressure receiving element 1 and the compensation element 2 are mounted by an adhesive material or the like facing each other sandwitching a case 5 and one electrode is drawn out in common with a lead pin 4-2 through the case 5. Moreover, an insulation seal material 6 maintains electric insulation of the lead pin 4-1 and the case 5 to ensure a better density. Then, the pressure is detected depending on the changes in the electrostatic capacitance of the pressure receiving element 1. This can elevate the stability of the output significantly against variations in the ambient temperature thereby enabling the application in a wide temperature range.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、圧力検出器に関し、例えば自動車のブレーキ
オイル圧等の高圧の圧力検出に使用するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pressure detector, and is used to detect high pressures such as brake oil pressure in automobiles, for example.

(従来の技術) 従来の圧力検出器としては、シリコン半導体のピエゾ抵
抗効果や金属歪ゲージを利用するものや、ブルドン管や
ベローズを利用した機械式のものがある。また、圧電素
子を使ったものが知られている。
(Prior Art) Conventional pressure detectors include those that utilize the piezoresistance effect of silicon semiconductors or metal strain gauges, and mechanical ones that utilize Bourdon tubes or bellows. Also, devices using piezoelectric elements are known.

(本発明が解決しようとする問題点) 前記半導体式のものは複雑な製造工程を要し、金属歪ゲ
ージ式のものは高増幅度の増幅器を要するため応用分野
が限られ、機械式のものは電気信号に変換して使用する
上で精度が悪いという問題点がある。
(Problems to be Solved by the Invention) The semiconductor type type requires a complicated manufacturing process, and the metal strain gauge type requires a high amplification amplifier, which limits its field of application. has the problem of poor accuracy when converted into an electrical signal for use.

また、圧電素子を使ったものは、動的な変化に対して検
出し易いが静的な変化を検出するのは難しいという問題
点がある。
Furthermore, devices using piezoelectric elements have the problem that dynamic changes are easy to detect, but static changes are difficult to detect.

(問題点を解決するための手段) 本発明は、圧力が加わると誘電率が変化する電歪素子を
受圧素子として用いると共に同一の温度係数を有する温
度補償素子を圧力の加わらない位置に設け、前記受圧素
子を測定しようとする圧力媒体中に置き静水圧的に圧力
を加え出力を取り出す構成としたものである。
(Means for Solving the Problems) The present invention uses an electrostrictive element whose dielectric constant changes when pressure is applied as a pressure receiving element, and provides a temperature compensating element having the same temperature coefficient at a position where no pressure is applied. The pressure receiving element is placed in a pressure medium to be measured, and pressure is applied hydrostatically to extract an output.

(作 用) 本発明になる圧力検出器においては、周囲温度変化に対
する出力の安定性が著しく向上し、広い温度範囲にわた
っての圧力検出器の使用が可能となり、圧力媒体中に受
圧素子が配置されているので、圧力変化に対して応答性
の良好な値が得られる。
(Function) In the pressure detector according to the present invention, the stability of the output against changes in ambient temperature is significantly improved, the pressure detector can be used over a wide temperature range, and the pressure receiving element is arranged in the pressure medium. Therefore, values with good responsiveness to pressure changes can be obtained.

(実施例) 以下、本発明を図に示す実施例について説明する。(Example) DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described.

第1図は本発明になる圧力検出器の第1実施例の構造を
示す縦断面図で、lは受圧素子(圧力検出素子)であり
、電歪効果を有する電歪素子からなっている。材質(組
成)は、P b CMg1y* Nbzz:+ ) O
s  P bT i 0wl系、P b (M g +
/3Nbt/3)O:l  PbTiO3Ba (Zn
+ziN bz/s ) Os系等のセラミックである
。1−1゜1−2は電極であり、受圧素子1の両面に取
り付けられている。材質は、/l、Ag等で、印刷、蒸
着等の手段で取り付けられている。
FIG. 1 is a vertical cross-sectional view showing the structure of a first embodiment of the pressure detector according to the present invention, where l is a pressure receiving element (pressure detecting element), which is made of an electrostrictive element having an electrostrictive effect. The material (composition) is P b CMg1y* Nbzz: + ) O
s P bT i 0wl system, P b (M g +
/3Nbt/3)O:l PbTiO3Ba (Zn
+ziN bz/s ) Os-based ceramic. Reference numerals 1-1 and 1-2 denote electrodes, which are attached to both sides of the pressure receiving element 1. The material is /l, Ag, etc., and is attached by means of printing, vapor deposition, etc.

2は、温度補償素子であり、受圧素子lと同一の材料、
構成で同一の温度特性を有する。2−1゜2−2は電極
である。3は金属板で、コバール、Cu等よりなる、4
−1.4−2はり−ドビンであり、Ni等からなる。4
−3.4−4はリード線である。受圧素子1の上部電極
1−1は金属板3とリード線4−3を介して、リードビ
ン4−1と半田付は等により、電気的導通が保たれてい
る。
2 is a temperature compensation element, made of the same material as the pressure receiving element 1;
The configuration has the same temperature characteristics. 2-1 and 2-2 are electrodes. 3 is a metal plate made of Kovar, Cu, etc.; 4
-1.4-2 The beam is made of Ni and the like. 4
-3.4-4 is a lead wire. Electrical continuity is maintained between the upper electrode 1-1 of the pressure-receiving element 1 and the metal plate 3 via the lead wire 4-3, and with the lead pin 4-1 by soldering.

5は上面および下面が開放された形状のケースであり、
SUS、クロムモリブデン網、ジュラルミン等の構造用
金属材料よりなる。受圧素子1と温度補償素子2はケー
ス5をはさんで相対して接着材等で取り付けられ、受圧
素子1と温度補償素子2はケース5によって、リードビ
ン4−2で一方の電極が共通に取り出される。6は絶縁
シール材で、ガラス等の絶縁物からなり、リードビン4
−1とケース5の電気的絶縁を保ち、密封性の良いもの
である。なお、ケース5の上端部は開放され圧力導入部
7とされている。
5 is a case with an open top and bottom surface,
Made of structural metal materials such as SUS, chromium molybdenum mesh, and duralumin. The pressure-receiving element 1 and the temperature-compensating element 2 are attached with an adhesive or the like to face each other with the case 5 in between, and one electrode of the pressure-receiving element 1 and the temperature-compensating element 2 is commonly taken out by the lead bin 4-2 through the case 5. It will be done. 6 is an insulating sealing material made of an insulating material such as glass;
-1 and case 5 are kept electrically insulated and have good sealing performance. Note that the upper end of the case 5 is opened and serves as a pressure introducing section 7.

第2図は、本発明になる圧力検出器の検出回路である。FIG. 2 shows a detection circuit of a pressure detector according to the present invention.

10は発振器であり、11はブリッジ回路である。ブリ
ッジ回路11は、受圧素子1と温度補償素子2とコンデ
ンサ2ケからなっている。
10 is an oscillator, and 11 is a bridge circuit. The bridge circuit 11 includes a pressure receiving element 1, a temperature compensating element 2, and two capacitors.

12は、増幅部であり、増幅と差動増幅回路を構成して
いる。
Reference numeral 12 denotes an amplification section, which constitutes an amplification and differential amplification circuit.

上記構成において、発振器10の信号は、ブリッジ回路
11に加えられ、受圧素子1と温度補償素子2にかかる
信号を、増幅部−12で増幅と差動増幅し、出力信号を
発生する。
In the above configuration, the signal from the oscillator 10 is applied to the bridge circuit 11, and the signals applied to the pressure receiving element 1 and the temperature compensation element 2 are amplified and differentially amplified by the amplifier section 12 to generate an output signal.

圧力媒体中に発生した圧力により、受圧素子1に静水圧
的な応力がかかる。この時、受圧素子lの静電容量C1
はΔCだけ変化してCI−ΔCとなる。そして第2図図
示の検出回路によってΔCに応じた電圧を発生する。な
お、ΔCは圧力に比例する。
Hydrostatic stress is applied to the pressure receiving element 1 due to the pressure generated in the pressure medium. At this time, the capacitance C1 of the pressure receiving element l
changes by ΔC to become CI−ΔC. Then, a voltage corresponding to ΔC is generated by the detection circuit shown in FIG. Note that ΔC is proportional to pressure.

第10図は、圧力と出力電圧との関係を示す特性図であ
る。電歪素子の誘電率は温度特性を持っており、受圧素
子1の静電容量は温度によっても変化する。電歪素子の
静電容量特性は第8図に示す通りである。
FIG. 10 is a characteristic diagram showing the relationship between pressure and output voltage. The dielectric constant of the electrostrictive element has temperature characteristics, and the capacitance of the pressure receiving element 1 also changes depending on the temperature. The capacitance characteristics of the electrostrictive element are as shown in FIG.

第2図図示の検出回路において、温度補償素子2を用い
なかった場合の零点の温度特性は第9図の点線で示す通
りであり、温度補償素子2を用いた場合は第9図の実線
で示す通りで、本発明になる圧力検出器においては、周
囲温度変化に対する出力の安定性が著しく向上し、広い
温度範囲にわたっての圧力検出器の使用が可能となる。
In the detection circuit shown in Figure 2, the temperature characteristics at the zero point when temperature compensation element 2 is not used are as shown by the dotted line in Figure 9, and when temperature compensation element 2 is used, the temperature characteristics at the zero point are as shown by the solid line in Figure 9. As shown, in the pressure sensor according to the present invention, the stability of the output against changes in ambient temperature is significantly improved, and the pressure sensor can be used over a wide temperature range.

また、本発明圧力検出器においては、圧力媒体中に受圧
素子が配置されているので、圧力媒体中の圧力変化に対
して応答性の良好な値が得られる。
Further, in the pressure detector of the present invention, since the pressure receiving element is disposed in the pressure medium, a value with good responsiveness to pressure changes in the pressure medium can be obtained.

特に、第3図は本発明になる圧力検出器の第2実施例を
示す。31は受圧素子、32は温度補償素子で、受圧素
子31と温度補償素子32とは同一の形状、材質、構成
であり、形状としては、中心に穴のあいたドーナツ状の
ものであり、また、材質および構成は、前記の第1実施
例と同じである。31−1.31−2.32−1.32
−2は、電極である。33は金属板であり、34−1.
34−2は、リードピンである。受圧素子31の上部電
極31−1は、金属板33を介してリードピン34−1
と半田付は等により、電気的導通が保たれている。35
はケースである。ここで、受圧素子31と温度補償素子
32はケース35をはさんで相対して接着剤等で取り付
けられ、それぞれの穴が一つの貫通穴を構成するように
なっており、その中をリードピン34−1が通っている
。36は絶縁シール材である。37は、圧力シール用の
カバーで、Al2O,等からなり、受圧素子31の上部
に取り付けられている。
In particular, FIG. 3 shows a second embodiment of the pressure detector according to the invention. 31 is a pressure receiving element, 32 is a temperature compensating element, the pressure receiving element 31 and the temperature compensating element 32 have the same shape, material, and structure, and are donut-shaped with a hole in the center; The material and structure are the same as in the first embodiment. 31-1.31-2.32-1.32
-2 is an electrode. 33 is a metal plate; 34-1.
34-2 is a lead pin. The upper electrode 31-1 of the pressure receiving element 31 is connected to the lead pin 34-1 via the metal plate 33.
Electrical continuity is maintained by soldering. 35
is the case. Here, the pressure-receiving element 31 and the temperature-compensating element 32 are attached with adhesive or the like to face each other with the case 35 in between, and each hole constitutes one through hole, through which the lead pin 34 is inserted. -1 is passing. 36 is an insulating sealing material. Reference numeral 37 denotes a cover for pressure sealing, which is made of Al2O, etc., and is attached to the top of the pressure receiving element 31.

第4図は第3の実施例を示す。41は受圧素子である。FIG. 4 shows a third embodiment. 41 is a pressure receiving element.

42は、温度補償素子であり、ドーナツ状の形状をして
おり、受圧素子41と同一材質で同じ温度特性を有する
。41−1.41−2.42−1.42−2は電極であ
り、43は、金属板である。44−1.44−2.44
−3は、リードピンである。44−4.44−5は、リ
ード線である。47は、スペーサであり、All O,
Reference numeral 42 denotes a temperature compensation element, which has a donut shape, is made of the same material as the pressure receiving element 41, and has the same temperature characteristics. 41-1.41-2.42-1.42-2 is an electrode, and 43 is a metal plate. 44-1.44-2.44
-3 is a lead pin. 44-4 and 44-5 are lead wires. 47 is a spacer, All O,
.

マコール等の絶縁物からなり、ドーナツ状になっている
。スペーサ47、ケース45、温度補償素子42は、中
心穴が一つの貫通穴を形成するよう取り付けられ、リー
ドピン44−1がこの穴を通る。46は絶縁シール材で
ある。
It is made of insulating material such as Makor and has a donut shape. The spacer 47, the case 45, and the temperature compensation element 42 are attached so that the center hole forms one through hole, and the lead pin 44-1 passes through this hole. 46 is an insulating sealing material.

前記第1.第2.第3の実施例では圧力導入部を設けて
いるが、圧力容器に直接取り付けてもよい。第5図は、
その一実施例としてアキュムレータに取り付けたもので
、第6図は第5図図示の破線部を拡大したものである。
Said 1st. Second. In the third embodiment, a pressure introduction part is provided, but it may be directly attached to the pressure vessel. Figure 5 shows
One example of this is that it is attached to an accumulator, and FIG. 6 is an enlarged view of the broken line portion shown in FIG. 5.

第5図において、59は圧力容器で60はオイルの導入
部、61はピストン、62はN2ガスを封じ込めるフタ
である。
In FIG. 5, 59 is a pressure vessel, 60 is an oil inlet, 61 is a piston, and 62 is a lid for sealing in N2 gas.

第6図において、58はガスケットで、その他のケース
55以外の構成は第3図図示の第2実施例の構成と同じ
である。
In FIG. 6, reference numeral 58 denotes a gasket, and the rest of the structure other than the case 55 is the same as the structure of the second embodiment shown in FIG.

また、第7図は第4実施例で、前記第4図図示の第3実
施例において、リードピン44−3およびリード、%!
;!44−5を廃した構成で、81は電極Ag、AI等
で、印刷等で取り付けられていて、ケース45と電気的
導通が保たれている。82はガラス等の絶縁物であり、
電極81と電極71−2との絶縁を保っている。その他
の構成は、第4図図示の第3実施例の構成と同じである
Further, FIG. 7 shows a fourth embodiment, and in the third embodiment shown in FIG. 4, the lead pin 44-3 and the lead, %!
;! 44-5 is omitted, and 81 is an electrode Ag, AI, etc., attached by printing or the like, and electrical continuity with the case 45 is maintained. 82 is an insulating material such as glass;
Insulation between electrode 81 and electrode 71-2 is maintained. The rest of the structure is the same as that of the third embodiment shown in FIG.

(発明の効果) 本発明になる圧力検査においては、静水圧的に圧力を検
出する圧力変化に対する応答性が良く、受圧素子と温度
補償素子とを同一の温度係数を有する電歪素子で形成し
ているから、周囲温度の変化に対する出力の安定性が著
しく向上し、広い温度範囲にわたっての圧力検出器の使
用が可能であるり、簡単な構成のため安価で小型の量産
性を有する等の効果が大である。
(Effects of the Invention) In the pressure test of the present invention, the pressure is detected hydrostatically and has good responsiveness to pressure changes, and the pressure receiving element and the temperature compensation element are formed of electrostrictive elements having the same temperature coefficient. Because of this, the stability of the output against changes in ambient temperature is significantly improved, the pressure sensor can be used over a wide temperature range, and the simple configuration allows for inexpensive and compact mass production. is large.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明になる圧力検査器の第1実施例の構成を
示す縦断面図、第2図は本発明になる圧力検出器の検出
回路、第3図、第4図、第7図はそれぞれ本発明になる
圧力検出器の第2.第3゜第4実施例を示す縦断面図、
第5図は本発明になる圧力検出器を圧力容器に直接取り
付けた状態の実施例を示す縦断面図、第6図は第5図図
示の破線部を拡大して示す図、第8図は電歪素子の静電
容量特性図、第9図は温度補償素子を使用しない場合と
使用した場合における出力一温度特性図、第10図は圧
力と出力電圧との関係を示す特性図である。 1.31.41・・・受圧素子(圧力検出素子)、1−
1.1−2.31−1.31−2.41−1゜41−2
・・・電極、2.32.42・・・温度補償素子、2−
1.2−2.32−1.32−2.42−1゜42−2
・・・電極、3,33.43・・・金属板、5゜35.
45・・・ケース、6,36.46・・・絶縁シール材
、41.42・・・リードピン、43.44・・・リー
ド線、37・・・圧力シール用カバー、47・・・スぺ
−サ、81.71−2・・・電極、82・・・絶縁物、
10・・・発振器、11・・・ブリツツジ回路、12・
・・増幅部、59・・・圧力容器、60・・・オイル導
入部、61・・・ピストン、58・・・ガスケット。 代理人弁理士  岡 部   隆 第1図 フ 第3図 第4図 第5図 bl         頃  J1 第6図 第7図 44−1   44−ど 第9図 逼1 T(0C) 第10図 圧力 P  (Kg/cm”)
FIG. 1 is a longitudinal sectional view showing the configuration of a first embodiment of the pressure tester according to the present invention, FIG. 2 is a detection circuit of the pressure detector according to the present invention, FIGS. 3, 4, and 7. are respectively the second. of the pressure detector according to the present invention. 3rd degree: A longitudinal sectional view showing the fourth embodiment,
FIG. 5 is a longitudinal cross-sectional view showing an embodiment of the pressure sensor according to the present invention attached directly to a pressure vessel, FIG. 6 is an enlarged view of the broken line part shown in FIG. 5, and FIG. FIG. 9 is a capacitance characteristic diagram of the electrostrictive element. FIG. 9 is an output-temperature characteristic diagram in the case where a temperature compensation element is not used and when it is used. FIG. 10 is a characteristic diagram showing the relationship between pressure and output voltage. 1.31.41...Pressure receiving element (pressure detecting element), 1-
1.1-2.31-1.31-2.41-1゜41-2
... Electrode, 2.32.42 ... Temperature compensation element, 2-
1.2-2.32-1.32-2.42-1゜42-2
...Electrode, 3,33.43...Metal plate, 5°35.
45...Case, 6,36.46...Insulating seal material, 41.42...Lead pin, 43.44...Lead wire, 37...Pressure seal cover, 47...Special -sa, 81.71-2...electrode, 82...insulator,
10... Oscillator, 11... Bridge circuit, 12.
...Amplifying section, 59...Pressure vessel, 60...Oil introduction section, 61...Piston, 58...Gasket. Attorney Takashi Okabe Figure 1 Figure 3 Figure 4 Figure 5 bl Around J1 Figure 6 Figure 7 44-1 44-Do Figure 9 1 T (0C) Figure 10 Pressure P ( Kg/cm”)

Claims (1)

【特許請求の範囲】[Claims]  上面及び下面が開放された形状の金属材料よりなるケ
ースの上面に電歪素子よりなる圧力検出素子を配設し、
前記ケースの下面に前記圧力検出素子と同一の温度係数
を有する電歪素子よりなる温度補償素子を配設し、前記
ケースを貫通しかつケースと絶縁されたリードピンを設
け、前記圧力検出素子の静電容量の変化により圧力を検
出するようにしたことを特徴とする圧力検出器。
A pressure detection element made of an electrostrictive element is arranged on the top surface of a case made of a metal material with an open top and bottom surface,
A temperature compensating element made of an electrostrictive element having the same temperature coefficient as the pressure sensing element is disposed on the lower surface of the case, and a lead pin passing through the case and insulated from the case is provided to compensate for the static electricity of the pressure sensing element. A pressure detector characterized in that pressure is detected by changes in capacitance.
JP60017199A 1985-01-30 1985-01-30 Pressure detector Pending JPS61175538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60017199A JPS61175538A (en) 1985-01-30 1985-01-30 Pressure detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60017199A JPS61175538A (en) 1985-01-30 1985-01-30 Pressure detector

Publications (1)

Publication Number Publication Date
JPS61175538A true JPS61175538A (en) 1986-08-07

Family

ID=11937265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60017199A Pending JPS61175538A (en) 1985-01-30 1985-01-30 Pressure detector

Country Status (1)

Country Link
JP (1) JPS61175538A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195904A (en) * 2000-12-27 2002-07-10 National Institute Of Advanced Industrial & Technology Pressure sensor
JP2003075277A (en) * 2001-09-05 2003-03-12 Omron Corp Sheetlike pressure sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5712157Y2 (en) * 1977-08-20 1982-03-10
JPS5841355Y2 (en) * 1978-07-31 1983-09-19 株式会社日本アルミ metal stile door

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5712157Y2 (en) * 1977-08-20 1982-03-10
JPS5841355Y2 (en) * 1978-07-31 1983-09-19 株式会社日本アルミ metal stile door

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195904A (en) * 2000-12-27 2002-07-10 National Institute Of Advanced Industrial & Technology Pressure sensor
JP2003075277A (en) * 2001-09-05 2003-03-12 Omron Corp Sheetlike pressure sensor

Similar Documents

Publication Publication Date Title
US4084438A (en) Capacitive pressure sensing device
US5186054A (en) Capacitive pressure sensor
SU593674A3 (en) Pressure pickup
JPS60195829A (en) Electrostatic capacity type insulated pressure detector
KR940001481B1 (en) Capacitive differential pressure detector
JPS5855732A (en) Electrostatic capacity type pressure sensor
CA2088741A1 (en) Capacitive strain gauge
JPS61500633A (en) pressure transducer
JPS614934A (en) Assembly of differential pressure sensor
EP0198018A1 (en) Capacitive sensing cell made of brittle material
US3739644A (en) Linearization of differential pressure integral silicon transducer
JPH02138776A (en) Semiconductor pressure sensor
JPS61175538A (en) Pressure detector
JPH0447244A (en) Semiconductor pressure sensor
JPH07174652A (en) Semiconductor pressure sensor and its manufacture as well as pressure detection method
JPS62204137A (en) Pressure detector
JPS58176532A (en) Measuring apparatus of pressure
JP3106939B2 (en) Capacitive pressure detector
JPS60247129A (en) High pressure detector
JPS60164230A (en) Force converter
JPS6021784Y2 (en) pressure sensor
JP2000065666A (en) Differential pressure sensor
JP3083115B2 (en) Capacitive pressure sensor element
JPS5844324A (en) Electrostatic capacity type pressure transducer
JPS5842943A (en) Differential capacity type pressure and differential pressure gauge