JPS61233337A - Pressure detector - Google Patents
Pressure detectorInfo
- Publication number
- JPS61233337A JPS61233337A JP7477185A JP7477185A JPS61233337A JP S61233337 A JPS61233337 A JP S61233337A JP 7477185 A JP7477185 A JP 7477185A JP 7477185 A JP7477185 A JP 7477185A JP S61233337 A JPS61233337 A JP S61233337A
- Authority
- JP
- Japan
- Prior art keywords
- vibrating body
- pressure
- coil
- cylinder
- vibration
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring 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
- G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
- G01L9/0008—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は例えば人工衛星用推進系の圧力を検出する圧
力検出器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure detector for detecting the pressure of a propulsion system for an artificial satellite, for example.
第２図は従来の人工衛星用圧力検出器を示す断面図であ
９２図において（１）はハウジング、（２）は支持台、
（３）は圧カポ−）ｙ１４）は入力電圧および出力信号
を処理する電子回路、（５）はコネクタ、６ａ） 、
（６１））はリード線、（７）は上記圧力ポート（３）
からの圧力を受けるダイヤフラム、（８］はビーム、（
９）はビーム（８）に取付けられたストレンゲージであ
る。Fig. 2 is a sectional view showing a conventional pressure detector for an artificial satellite. In Fig. 92, (1) is a housing, (2) is a support base,
(3) is a pressure capo) y14) is an electronic circuit that processes input voltage and output signals, (5) is a connector, 6a),
(61)) is the lead wire, (7) is the above pressure port (3)
The diaphragm receives pressure from the beam, (8) is the beam, (
9) is a strain gauge attached to the beam (8).
従来の圧力検出器は上記のように構成され、たとえば圧
力容器等を圧力ポート（３）に溶接した後圧力容器を加
圧することにより、圧力ポート（３）ヲ通じてダイヤフ
ラム（７）に圧力が与えられ、それによシビームｔ８１
を変形させ、それにともないストレンゲージ（９）が変
形し出力電圧を変化させその出力電圧の変化から圧力を
検出するようになっている。７また。ストレンゲージ（
９）の出力信号は電子回路（４）で温度補償され増幅さ
れてコネクタ（５）に導びかれるようになっている。A conventional pressure detector is constructed as described above. For example, by welding a pressure vessel or the like to the pressure port (3) and pressurizing the pressure vessel, pressure is applied to the diaphragm (7) through the pressure port (3). Given, it will be sibbeam t81
When the strain gauge (9) is deformed, the strain gauge (9) is deformed and the output voltage is changed, and the pressure is detected from the change in the output voltage. 7 again. Strain gauge (
The output signal of 9) is temperature-compensated and amplified by an electronic circuit (4), and then guided to a connector (5).
上記のような従来の圧力検出器ではストレンゲージ（９
）の変形による抵抗変化にもとづく出力信号は非線形性
、ヒステリシス、摩擦、非再現性および零点調節等によ
シ圧力計測範囲にわたって±１Ｊ％の検出誤差を生ずる
欠点があった。またストレンゲージ（９）の出力信号は
温度補償されても６０℃の温度変化によシシフトし、圧
力計測範囲にわたって、±１．０％の検出誤差を生ずる
欠点があった。Conventional pressure detectors such as those described above use strain gauges (9
The output signal based on the change in resistance due to the deformation of the pressure sensor has the drawback of nonlinearity, hysteresis, friction, non-repeatability, zero point adjustment, etc., resulting in a detection error of ±1 J% over the pressure measurement range. Further, even if the output signal of the strain gauge (9) is temperature compensated, it shifts due to a temperature change of 60° C., resulting in a detection error of ±1.0% over the pressure measurement range.
また、ストレンゲージ（９）の出力信号は圧力に比例し
たアナログ信号であシ２人工衛星に使用する場合、アナ
ログ・ディジタル変換器を必要とする欠点があった。Further, the output signal of the strain gauge (9) is an analog signal proportional to pressure, and when used in the 2nd artificial satellite, there is a drawback that an analog-to-digital converter is required.
この発明はかかる問題点を解決するためになされたもの
で、ストレンゲージの変形現象にともなう非線形性、ヒ
ステリシス、摩擦、非再現性による検出誤差を排除し検
出精度の高い圧力検出器を得ることを目的とする。This invention was made to solve these problems, and aims to eliminate detection errors caused by nonlinearity, hysteresis, friction, and non-reproducibility caused by strain gauge deformation phenomena, and to obtain a pressure detector with high detection accuracy. purpose.
また、上記目的に加えて、出力信号をディジタル信号と
する圧力検出器を得ることを目的とする。In addition to the above object, another object of the present invention is to obtain a pressure detector whose output signal is a digital signal.
〔問題点を解決するための手段〕
この発明に係る圧力検出器はハウジング内の振動体を支
持台に固定し、上記振動体内のシリンダを上記支持台に
固定し、このシリンダに駆動コイルとピックアップコイ
ルを取付けたものである。[Means for solving the problem] In the pressure detector according to the present invention, a vibrating body in a housing is fixed to a support base, a cylinder in the vibrating body is fixed to the support base, and a drive coil and a pickup are attached to the cylinder. It has a coil attached.
この発明においては、圧力を受ける振動体を駆動コイル
で振動させ、任意の圧力によシ定まった振動体の固有振
動数にもとづいて圧力を検出する。In this invention, a vibrating body receiving pressure is vibrated by a drive coil, and pressure is detected based on the natural frequency of the vibrating body determined by an arbitrary pressure.
第１図はこの発明の一実施例を示す圧力検出器の断面図
であり、（ｘ＋〜（６）は上記従来装置と全く同一のも
のである。FIG. 1 is a cross-sectional view of a pressure detector showing an embodiment of the present invention, and (x+ to (6)) are completely the same as the above-mentioned conventional device.
ａｌは支持台（２）に固定された振動体、＋ｌυは支持
台（２）に固定されたシリンダ、α２はシリンダαυに
取付けられた駆動コイル、 （１３１はシリンダαυに
取付けられたピックアップコイルであって、この実施例
ではハウジング（１１と振動体αＱの空間は密封され真
空に保持されており、圧力ポート（３）から振動体１１
Ｇの内側に圧力が作用するよう罠なっている。al is the vibrating body fixed to the support base (2), +lυ is the cylinder fixed to the support base (2), α2 is the drive coil attached to the cylinder αυ, (131 is the pickup coil attached to the cylinder αυ) Therefore, in this embodiment, the space between the housing (11) and the vibrating body αQ is sealed and kept in vacuum, and the vibrating body 11 is
It is a trap so that pressure acts on the inside of G.
上記のように構成された圧力検出器においては支持台（
２）に固定された振動体α呻は圧力ポート（３１を通じ
て内側に圧力を受けると振動体（ＩＩの内側と外側の圧
力差によ、す、振動体Ｑ（Ｉ内に応力を生じ、それにと
もなって振動体ｉｌＧのバネ定数が変化して固有振動数
が変わる。一般にこの振動体Ｑｌの固有振動数（ｆ）は
次式から求めることができる。In the pressure detector configured as above, the support stand (
When the vibrating body α fixed to the vibrating body Q (2) receives pressure inside through the pressure port (31), stress is generated in the vibrating body Q (I) due to the pressure difference between the inside and outside of the vibrating body (II), and Accordingly, the spring constant of the vibrating body ilG changes and the natural frequency changes.Generally, the natural frequency (f) of the vibrating body Ql can be determined from the following equation.
但し、 Ｋ：バネ定数
ｍ：質量
第（１）式から、いま振動体内の内側の圧力を増大させ
ると振動体内のバネ定数が増大し、振動体＋１（１の固
有振動数が増大する。However, K: Spring constant m: Mass From equation (1), if the pressure inside the vibrating body is increased, the spring constant inside the vibrating body increases, and the natural frequency of the vibrating body +1 (1) increases.
したがって振動体（１Ｇの固有振動数が圧力に比例する
ことから、駆動コイル鰺によシ振動体（１［ｌを振動さ
せ、ピックアップコイルｕ３で振動体α１の固有振動数
を検出することによシ圧力を検出することになる。Therefore, since the natural frequency of the vibrating body (1G) is proportional to the pressure, by vibrating the vibrating body (1 [l) in the drive coil and detecting the natural frequency of the vibrating body α1 with the pickup coil The pressure will be detected.
また、ピックアップコイル１国によシ検出された振動体
ａｌの固有振動数はり一ドａｃ６ｂ）Ｉｃよシミ子回路
（４）に導びかれ、電子回路（４）で処理され、コネク
タ（５）からディジタル信号で出力される。In addition, the natural frequency of the vibrating body Al detected by the pickup coil 1 is guided to the Shimiko circuit (4), processed by the electronic circuit (4), and then connected to the connector (5). is output as a digital signal.
なお９人工衛星の推進系に利用する場合、圧カポ−）
（３１’ｉ正圧力モニタする圧力容器近くの配管に溶接
し、圧力容器の圧力を検出する。In addition, when used in the propulsion system of 9 artificial satellites, pressure capo)
(31'i Weld to the pipe near the pressure vessel to monitor positive pressure and detect the pressure of the pressure vessel.
また、コネクタ（５）を介して入力電圧が与えられ。An input voltage is also applied via the connector (5).
コネクタ（５）からの出力信号がディジタル信号によシ
テレメトリ系に与えられ地上に送信される。The output signal from the connector (5) is given to the telemetry system as a digital signal and transmitted to the ground.
なお上記実施例ではハウジング（１１と振動体内の空間
を真空に保持しているが、その空間にある任意の圧力を
与えればその圧力を基準として同様に圧力を検出するこ
とができる。In the above embodiment, the space inside the housing (11) and the vibrating body are kept in a vacuum, but if an arbitrary pressure is applied to the space, the pressure can be similarly detected using that pressure as a reference.
ところで上記説明では、この発明を人工衛星推進系の圧
力検出に利用する場合について述べたがその他の圧力検
出にも利用できることはいうまでもない。Incidentally, in the above explanation, the case where the present invention is used for pressure detection in an artificial satellite propulsion system has been described, but it goes without saying that it can also be used for other pressure detection.
この発明は以上説明したとお）、ストレンゲージの変形
現象を利用するものでなく、振動体の固有振動数を利用
するものであることから変形現象にともなう非線形性、
ヒステリシス、摩擦及び非再現性による検出誤差を排除
し、検出精度を高くするという効果がある。As explained above, this invention does not utilize the deformation phenomenon of a strain gauge, but rather utilizes the natural frequency of the vibrating body.
This has the effect of eliminating detection errors due to hysteresis, friction, and non-reproducibility, and increasing detection accuracy.
また振動体の固有振動数を利用していることから出力信
号をディジタル信号にすることが容易となるという効果
がある。Furthermore, since the natural frequency of the vibrating body is utilized, the output signal can be easily converted into a digital signal.
第１図はこの発明の一実施例を示す圧力検出器の断面図
、第２図は従来の圧力検出器を示す断面図である。
図において、（１）はハウジング、（２）は支持台、（
３）は圧カポ−）、（４１は電子回路、（５）はコネク
タ。
（６ａ） ？ （（Ｓｂ） はリード線、 Ｑｌは振
動体、〔υはシリンダ、 ａＺは駆動コイル、 ＋１３
１はピックアップコイルである。
なお２図中同一符号は同一または相当部分を示す。FIG. 1 is a sectional view of a pressure detector according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional pressure detector. In the figure, (1) is the housing, (2) is the support stand, (
3) is the pressure capo), (41 is the electronic circuit, (5) is the connector. (6a) ? ((Sb) is the lead wire, Ql is the vibrating body, [υ is the cylinder, aZ is the drive coil, +13
1 is a pickup coil. Note that the same reference numerals in the two figures indicate the same or corresponding parts.
Claims (1)
、この支持台に取付けられたシリンダと、このシリンダ
に取付けられ、上記振動体を振動させる駆動コイルと、
上記シリンダに取付けられ、圧力に比例する振動体の固
有振動数を検出するピックアップコイルと、上記振動体
、シリンダ、駆動コイルおよびピックアップコイルを覆
うハウジングとを具備したことを特徴とする圧力検出器
。A vibrating body that receives pressure, a support base that supports the vibrating body, a cylinder attached to the support base, and a drive coil that is attached to the cylinder and vibrates the vibrating body.
A pressure detector comprising: a pickup coil that is attached to the cylinder and detects the natural frequency of the vibrating body that is proportional to pressure; and a housing that covers the vibrating body, the cylinder, the drive coil, and the pickup coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7477185A JPS61233337A (en) | 1985-04-09 | 1985-04-09 | Pressure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7477185A JPS61233337A (en) | 1985-04-09 | 1985-04-09 | Pressure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61233337A true JPS61233337A (en) | 1986-10-17 |
Family
ID=13556881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7477185A Pending JPS61233337A (en) | 1985-04-09 | 1985-04-09 | Pressure detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61233337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063349A (en) * | 2012-12-27 | 2013-04-24 | 太原航空仪表有限公司 | External electric magnetization small size vibration cylinder pressure transducer |
-
1985
- 1985-04-09 JP JP7477185A patent/JPS61233337A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063349A (en) * | 2012-12-27 | 2013-04-24 | 太原航空仪表有限公司 | External electric magnetization small size vibration cylinder pressure transducer |
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