JPH0424650B2 - - Google Patents
Info
- Publication number
- JPH0424650B2 JPH0424650B2 JP61013835A JP1383586A JPH0424650B2 JP H0424650 B2 JPH0424650 B2 JP H0424650B2 JP 61013835 A JP61013835 A JP 61013835A JP 1383586 A JP1383586 A JP 1383586A JP H0424650 B2 JPH0424650 B2 JP H0424650B2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- coil
- base
- core
- sliding body
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はコイルとダイヤフラムを有する圧力検
出装置に係り、特にダイヤフラムに加わる圧力の
調整に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pressure detection device having a coil and a diaphragm, and particularly to adjusting the pressure applied to the diaphragm.
従来の装置は特開昭50−17656号に記載のよう
に、動作原理のみで、部品構成を具体的に記述し
たものはほとんどない。
As described in Japanese Patent Application Laid-Open No. 17656/1983, conventional devices only describe the operating principle, and there is almost no concrete description of the component configuration.
コイルとダイヤフラムを有するものでは、部品
の誤差、組付け誤差等で規定の値がでず、レベル
調整を必要とするが、これの具体的記述がなく知
ることはできない。 For those with a coil and diaphragm, the specified value cannot be achieved due to parts errors, assembly errors, etc., and level adjustment is required, but it is impossible to know because there is no specific description of this.
ダイヤフラムの浮力に抗する鵜ねをコイル内に
設ける構造のものにおいて、ばねのたわみ量によ
り鉄分の変化はコイルのリアクタンス変化に大き
な影響を与えることから、検出制度を決める要素
にもなり得るものである。
For coils with a structure in which a spring is provided inside the coil to resist the buoyancy of the diaphragm, changes in the iron content due to the amount of deflection of the spring have a large effect on changes in the reactance of the coil, so it can also be a factor that determines the detection accuracy. be.
本発明の目的、ダイヤフラムの浮圧を調整する
のに、これに抗するばねのたわみ量を調整して行
なうが、この時のばねのたわみ量で変化するコイ
ルのリアクタンスを最小限に抑えることにある。 The purpose of the present invention is to adjust the floating pressure of the diaphragm by adjusting the amount of deflection of the spring that resists this, and to minimize the reactance of the coil that changes depending on the amount of deflection of the spring at this time. be.
本発明は、基台と、この基台に取り付けられる
蓋体と、基台と蓋体とで形成される空間の室と、
この室に置かれるダイヤフラムと、ダイヤフラム
の受圧背面側に取り付けられる受圧台と、この受
圧台に取り付けられる磁性性としてのコアと、基
台に取り付けられる磁気誘導をもつコイルとから
なり、ダイヤフラムに加わる圧力の変化によりコ
イルに近づいたり、離れたりコアが移動するよう
にし、しかもこのコアの移動により変化するコイ
ルのリアクタンスを利用して圧力検知をする圧力
検知装置において、前記コイルの内側にコアが出
入りするようにコイルの内径をコアの外径よりも
大きく形成し、コイルの内周側に摺動自在なる摺
動体を設け、この摺動体を挟持するように二つの
つる巻きばねを設け、一方のばねは小径でばね定
数が小さくなるように形成し、他方のばねは大径
でばね定数が大きくなるように形成し、大きいば
ねはコアの内径よりも小さく形成し、小さいばね
はコア内径よりも小さく形成し、小さいばねは摺
動体と受圧台との間に介在するとともに受圧台に
当接する側をコアの内方に落し込まれるように配
置し、大きいばねは摺動体を介して小さいばねを
押圧するように配置し、二つのばねと摺動体がほ
ぼ一直線上に並ぶように配置し、基台に固定台を
取り付け、この固定台に調整ねじを設け、この調
整ねじと摺動体の間に大きいばねを介在し、調整
ねじをねじ込む方向に回わすことにより大きいば
ねが摺動側制に押圧されて圧縮するように構成し
たことを特徴とするものである。
The present invention provides a base, a lid attached to the base, a chamber in a space formed by the base and the lid,
It consists of a diaphragm placed in this chamber, a pressure receiving stand attached to the pressure receiving back side of the diaphragm, a magnetic core attached to this pressure receiving stand, and a coil with magnetic induction attached to the base, which applies the force to the diaphragm. In a pressure sensing device, the core moves closer to or away from the coil due to changes in pressure, and the core moves in and out of the inside of the coil, and the pressure is detected using the reactance of the coil that changes as the core moves. The inner diameter of the coil is made larger than the outer diameter of the core, a sliding body is provided on the inner circumferential side of the coil, two helical springs are provided to sandwich this sliding body, and one One spring is formed with a small diameter and a small spring constant, the other spring is formed with a large diameter and a large spring constant, the large spring is formed smaller than the inner diameter of the core, and the smaller spring is formed with a smaller spring constant than the inner diameter of the core. The small spring is interposed between the sliding body and the pressure-receiving base, and the side that contacts the pressure-receiving base is placed inside the core, and the large spring connects the small spring through the sliding body. The two springs and the sliding body are arranged so as to be pressed, and the two springs and the sliding body are arranged in almost a straight line, a fixed base is attached to the base, an adjustment screw is provided on this fixed base, and a spring is placed between the adjustment screw and the sliding body. It is characterized by a large spring interposed therebetween, so that when the adjusting screw is turned in the screwing direction, the large spring is pressed against the sliding side brake and compressed.
本発明の実施例を第１図、第２図、及び第３図
により説明すると、１は基台で内部のポリウレタ
ン被覆電線等のコイル１０を注型用エポキシ樹脂
１１などで封入固定し、ダイヤフラム４を中心部
に圧力導入口２を有する蓋体３との間で挟持して
いる。コア（磁性体）８はダイヤフラム４の非受
圧側に乗つた受圧台５の爪部６に着脱自在に係止
し、ダイヤフラム４の浮力でばね９，１３の反力
に抗して前記コイル１０の内面を摺動する。
An embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. Reference numeral 1 denotes a base in which a coil 10 such as a polyurethane-coated electric wire is sealed and fixed with an epoxy resin 11 for casting, and a diaphragm is fixed. 4 is held between a lid body 3 having a pressure introduction port 2 in the center. The core (magnetic material) 8 is removably engaged with the claw portion 6 of the pressure receiving base 5 which is placed on the non-pressure receiving side of the diaphragm 4, and the coil 10 is held against the reaction force of the springs 9 and 13 by the buoyancy of the diaphragm 4. slides on the inner surface of the
ばね９はばね１３よりばね定数が小さく、ダイ
ヤフラム４寄りに、また、ばね９は調整ねじ１６
寄りに取付けてある。ばね９の付与力は調整ねじ
１６で自由に変えることができるものである。 The spring 9 has a smaller spring constant than the spring 13 and is closer to the diaphragm 4, and the spring 9 is attached to the adjustment screw 16.
It is installed nearby. The force applied by the spring 9 can be freely changed using an adjustment screw 16.
ばね９とばね１３は下面に凹部１２ａを設けた
摺動体１２を挟持し、摺動体１２を中心に伸縮す
る。又、摺動体１２は前記コイル１０の内面を円
周方向のがたがなく滑らかに摺動するものであ
る。 The spring 9 and the spring 13 sandwich a sliding body 12 having a recess 12a on its lower surface, and expand and contract around the sliding body 12. Further, the sliding body 12 slides smoothly on the inner surface of the coil 10 without any rattling in the circumferential direction.
ばね１３の初荷量は受圧台５の段部７が摺動体
１２の下面に設けた凹部１２ａに当接する時の荷
量、すなわちばね９の最大たわみ時の荷量よりも
大きく設定してある。また、前記段部７と凹部１
２ａとの間隙は初期の段階で段部７の高さを設定
することで変えることができるものである。 The initial load amount of the spring 13 is set to be larger than the load amount when the stepped portion 7 of the pressure receiving base 5 comes into contact with the recess 12a provided on the lower surface of the sliding body 12, that is, the load amount when the spring 9 is at its maximum deflection. In addition, the step portion 7 and the recess portion 1
2a can be changed by setting the height of the stepped portion 7 at an initial stage.
１４は固定台で固定爪１５を有し、基台１に嵌
合固定され、中央ねじ部にはばね１３を受けた調
整ねじ１６を回転自在に係合している。 Reference numeral 14 denotes a fixing base having a fixing claw 15, which is fitted and fixed to the base 1, and an adjusting screw 16 receiving a spring 13 is rotatably engaged in the central screw portion.
調整ねじ１６の調整範囲はばね１３が動作して
いる時のみで、ばね９が動作している時は不可能
である。 The adjustment range of the adjusting screw 16 is only available when the spring 13 is operating, and is not possible when the spring 9 is operating.
コイル１０は引出線１７を介して第２図の発振
回路に導通されている。 The coil 10 is electrically connected to the oscillation circuit shown in FIG. 2 via a lead wire 17.
１８はコンデンサーで負の温度特性を持つポリ
プロピレンフイルムコンデンサーである。 The capacitor 18 is a polypropylene film capacitor with negative temperature characteristics.
動作を説明すると空気圧でダイヤフラムは浮力
を受け受圧台、コアと共に動き、コアはコイル内
を上昇する。この時、始めばね９がダイヤフラム
の浮力に抗して摺動体の凹部に受圧台の段部が当
接するまでたわみ、当接した時点でばね９のたわ
みは止まり、次にばね１３がたわみ始める。 To explain the operation, the diaphragm receives buoyancy from air pressure and moves together with the pressure receiving base and core, and the core rises inside the coil. At this time, the spring 9 initially deflects against the buoyant force of the diaphragm until the stepped portion of the pressure receiving base contacts the recessed portion of the sliding body, and at the time of contact, the deflection of the spring 9 stops, and then the spring 13 begins to deflect.
コアがコイル内に摺動することでリアクタンス
が変化し、コイルを結線する回路の周波数も変化
する。コアが上昇するにつれて周波数は減少する
形になつている。空気圧はこの周波数の大小で判
別し検出するものである。 As the core slides inside the coil, the reactance changes, and the frequency of the circuit connecting the coil also changes. As the core rises, the frequency decreases. Air pressure is determined and detected based on the magnitude of this frequency.
ダイヤフラムは一般にコムで薄く成形したので
あることから、周囲温度で硬度が変わり、一定の
圧力を加えても均一なたわみ量が得られず温度差
による圧力検出誤差が生ずる。ダイヤフラムの温
度変化は第３図の一点鎖線に示したように正の特
性を示す。これを正しく実線のように補正してや
るには、破線のような負の温度特性をもつ、ポリ
プロピレンフイルムコンデンサーが必要となる。 Since the diaphragm is generally formed into a thin comb, its hardness changes depending on the ambient temperature, and even if a constant pressure is applied, a uniform amount of deflection cannot be obtained, resulting in pressure detection errors due to temperature differences. The temperature change of the diaphragm exhibits a positive characteristic as shown by the dashed line in FIG. In order to correct this correctly as shown in the solid line, a polypropylene film capacitor with negative temperature characteristics as shown in the broken line is required.
以上述べたとおり、本発明は、基台と、この基
台に取り付けられる蓋体と、基台と蓋体とで形成
される空間の室と、この室に置かれるダイヤフラ
ムと、ダイヤフラムの受圧背面側に取り付けられ
る受圧台と、この受圧台に取り付けられる磁性体
としてのコアと、基台に取り付けられる磁気誘導
をもつコイルとからなり、ダイヤフラムに加わる
圧力の変化によりコイルに近づいたり、離れたり
コアが移動するようにし、しかもこのコアの移動
により変化するコイルのリアクタンスを利用して
圧力検知をする圧力検出装置において、前記コイ
ルの内側にコアが出入りするようにコイルの内径
をコアの外径よりも大きく形成し、コイルの内周
側に摺動自在なる摺動体を設け、この摺動体を挟
持するように二つのつる巻きばねを設け、一方の
ばねは小径でばね定数が小さくなるように形成
し、他方のばねは大径でばね定数が大きくなるよ
うに形成し、大きいばねはコアの外径よりも小さ
く形成し、小さいばねはコアの内径よりも小さく
形成し、小さいばねは摺動体と受圧台との間に介
在するとともに受圧台に当接する側をコアの内方
に落し込まれるように配置し、大きいばねは摺動
体を介して小さいばねを押圧するように配置し、
二つのばねと摺動体がほぼ一直線上に並ぶように
配置し、基台に固定台を取り付け、この固定台に
調整ねじを設け、この調整ねじと摺動体の間に大
きいばねを介在し、調整ねじをねじ込む方向に回
わすことにより大きいばねが摺動体側に押圧され
て圧縮するように構成したことを特徴とする圧力
検出装置にある。
As described above, the present invention provides a base, a lid attached to the base, a chamber of a space formed by the base and the lid, a diaphragm placed in this chamber, and a pressure-receiving rear surface of the diaphragm. It consists of a pressure receiving stand attached to the side, a core as a magnetic material attached to the pressure receiving stand, and a coil with magnetic induction attached to the base. In a pressure detection device that detects pressure by making use of the reactance of the coil that moves and changes with the movement of the core, the inner diameter of the coil is set so that the inner diameter of the coil is smaller than the outer diameter of the core so that the core moves in and out of the inside of the coil. A sliding body that can freely slide is provided on the inner circumference of the coil, and two helical springs are provided to sandwich this sliding body. One spring is formed to have a small diameter and a small spring constant. However, the other spring is formed to have a large diameter and a large spring constant, the large spring is formed to be smaller than the outer diameter of the core, the smaller spring is formed to be smaller than the inner diameter of the core, and the smaller spring is formed to have a larger spring constant than the sliding body. The side that is interposed between the core and the pressure receiving table and comes into contact with the pressure receiving table is arranged so as to fall into the inside of the core, and the large spring is arranged so as to press the small spring via the sliding body,
The two springs and the sliding body are arranged so that they are almost in a straight line, a fixed stand is attached to the base, an adjustment screw is provided on this fixed stand, and a large spring is interposed between the adjusting screw and the sliding body to make the adjustment. The pressure detection device is characterized in that a large spring is compressed by being pressed against the sliding body by turning the screw in the screwing direction.
この構成によれば、次のような良さがある。 This configuration has the following advantages.
(1) 摺動体がコイルの内側に移動自在に置かれ、
この摺動体を挟持するように、コイルの内径よ
りも小さいつる巻状の二つのばねを配置して全
体をコンパクトにまとめているので小型化がで
きた。(1) A sliding body is movably placed inside the coil,
Two helical springs smaller than the inner diameter of the coil are arranged to sandwich this sliding body, making the whole compact, making it possible to reduce the size.
(2) 圧力検知時にはコイルから離れている小さい
ばねがたわむ。しかも、この小さなばねはコア
の内方に落し込むように置かれているのでばね
自体のコイルリアクタンス変化の影響は少な
い、検出精度がよい。(2) A small spring separate from the coil deflects when pressure is detected. Moreover, since this small spring is placed so as to fall inside the core, it is less affected by changes in the coil reactance of the spring itself, and the detection accuracy is good.
(3) 調整ねじを回すことにより、圧力検知の調整
が容易にできる。(3) Pressure detection can be easily adjusted by turning the adjustment screw.
(4) 大きいばねはコイルに近いが調整か終ると、
圧力検知中にほとんどたわみ変化が生じないの
で圧力検知の精度は低下しないのである。(4) Large springs are close to coils, but after adjustment,
Since almost no change in deflection occurs during pressure detection, the accuracy of pressure detection does not decrease.
第１図は本発明の一実施例を示す主要部断面
図、第２図は第１図の圧力検出器を駆動する回路
図、第３図は温度特性図である。
１……基台、２……圧力導入口、３……蓋体、
４……ダイヤフラム、５……受圧台、６爪部、７
……段部、８……コア、９……ばね、１０……コ
イル、１１……注型剤、１２……摺動体、１２ａ
……凹部、１３……ばね、１４……固定台、１５
……固定爪、１６……調整ねじ、１７……引出
線、１８……コンデンサー。
FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a circuit diagram for driving the pressure detector of FIG. 1, and FIG. 3 is a temperature characteristic diagram. 1... Base, 2... Pressure introduction port, 3... Lid body,
4...Diaphragm, 5...Pressure receiving base, 6 Claw portion, 7
... Stepped portion, 8 ... Core, 9 ... Spring, 10 ... Coil, 11 ... Casting agent, 12 ... Sliding body, 12a
... recess, 13 ... spring, 14 ... fixed base, 15
... Fixed claw, 16 ... Adjustment screw, 17 ... Lead wire, 18 ... Capacitor.
Claims (1)
基台と蓋体とで形成される空間の室と、この室に
置かれるダイヤフラムと、ダイヤフラムの受圧背
面側に取り付けられる受圧台と、この受圧台に取
り付けられる磁性体としてのコアと、基台に取り
付けられる磁気誘導をもつコイルとからなり、ダ
イヤフラムに加わる圧力の変化によりコイルに近
づいたり、離れたりコアが移動するようにし、し
かもこのコアの移動により変化するコイルのリア
クタンスを利用して圧力検知をする圧力検出装置
において、 前記コイルの内側にコアが出入りするようにコ
イルの内径をコアの外径よりも大きく形成し、コ
イルの内周側に摺動自在なる摺動体を設け、この
摺動体を挟持するように二つのつる巻きばねを設
け、一方のばねは小径でばね定数が小さくなるよ
うに形成し、他方のばねは大径でばね定数が大き
くなるように形成し、大きいばねはコアの外径よ
りも小さく形成し、小さいばねはコアの内径より
も小さく形成し、 小さいばねは摺動体と受圧台との間に介在する
とともに受圧台に当接する側をコアの内方に落し
込まれるように配置し、大きいばねは摺動体を介
して小さいばねを押圧するように配置し、二つの
ばねと摺動体がほぼ一直線上に並ぶように配置
し、 基台に固定台を取り付け、この固定台に調整ね
じを設け、この調整ねじと摺動体の間に大きいば
ねを介在し、調整ねじをねじ込む方向に回わすこ
とにより大きいばねが摺動体側に押圧されて圧縮
するように構成したことを特徴とする圧力検出装
置。[Claims] 1. A base, a lid attached to the base,
A chamber in the space formed by the base and the lid, a diaphragm placed in this chamber, a pressure receiving stand attached to the pressure receiving back side of the diaphragm, a core as a magnetic body attached to this pressure receiving stand, and the base. It consists of a coil with magnetic induction that is attached to the diaphragm, and the core moves toward or away from the coil as the pressure applied to the diaphragm changes, and the pressure is detected using the reactance of the coil that changes as the core moves. In the pressure detection device, the inner diameter of the coil is formed larger than the outer diameter of the core so that the core can move in and out of the inside of the coil, and a sliding body is provided on the inner circumferential side of the coil, and this sliding body Two helical springs are provided to sandwich the , one spring is formed to have a small diameter and a small spring constant, the other spring is formed to have a large diameter and a large spring constant, and the large spring is formed to have a large spring constant. The outer diameter of the small spring is smaller than the inner diameter of the core, and the small spring is interposed between the sliding body and the pressure receiving base, and the side that contacts the pressure receiving base is dropped into the inside of the core. The large spring is placed so that it presses the small spring through the sliding body, and the two springs and the sliding body are arranged in almost a straight line.A fixed base is attached to the base, and this An adjustment screw is provided on the fixed base, a large spring is interposed between the adjustment screw and the sliding body, and the large spring is pressed against the sliding body and compressed by turning the adjustment screw in the screwing direction. A pressure detection device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1383586A JPS6296833A (en) | 1986-01-27 | 1986-01-27 | Pressure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1383586A JPS6296833A (en) | 1986-01-27 | 1986-01-27 | Pressure detector |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60235252A Division JPH0654275B2 (en) | 1985-10-23 | 1985-10-23 | Pressure detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6296833A JPS6296833A (en) | 1987-05-06 |
| JPH0424650B2 true JPH0424650B2 (en) | 1992-04-27 |
Family
ID=11844330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1383586A Granted JPS6296833A (en) | 1986-01-27 | 1986-01-27 | Pressure detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6296833A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3230328A (en) * | 1962-08-23 | 1966-01-18 | Controls Co Of America | Adjustable pressure switch having positive reset means |
| US3315053A (en) * | 1964-04-16 | 1967-04-18 | Robertshaw Controls Co | Pressure responsive resetting controller |
| US3359387A (en) * | 1965-10-23 | 1967-12-19 | Robertshaw Controls Co | Pressure switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6061635U (en) * | 1983-10-04 | 1985-04-30 | 川崎製鉄株式会社 | pressure measuring device |
-
1986
- 1986-01-27 JP JP1383586A patent/JPS6296833A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3230328A (en) * | 1962-08-23 | 1966-01-18 | Controls Co Of America | Adjustable pressure switch having positive reset means |
| US3315053A (en) * | 1964-04-16 | 1967-04-18 | Robertshaw Controls Co | Pressure responsive resetting controller |
| US3359387A (en) * | 1965-10-23 | 1967-12-19 | Robertshaw Controls Co | Pressure switch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6296833A (en) | 1987-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |