JPS6098310A - Physical quantity converter - Google Patents
Physical quantity converterInfo
- Publication number
- JPS6098310A JPS6098310A JP20672883A JP20672883A JPS6098310A JP S6098310 A JPS6098310 A JP S6098310A JP 20672883 A JP20672883 A JP 20672883A JP 20672883 A JP20672883 A JP 20672883A JP S6098310 A JPS6098310 A JP S6098310A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- time constant
- pulse signal
- pulse
- physical quantity
- 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
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/243—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the phase or frequency of ac
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、大刃物理量に応じて変化するインピーダンス
に関連したオンオフデユーティ比のパルス信号を発生は
せ、このパルス信号に基づき装置出力を発信する物理量
変換装置に関し、更に詳しく述べれば、このような装置
に好適なダンピング特性変更手段を持った物ＴＭ量変換
装置に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention generates a pulse signal with an on-off duty ratio related to the impedance that changes according to the physical quantity of the large blade, and adjusts the device output based on this pulse signal. The present invention relates to a physical quantity converting device for transmitting signals, and more specifically, to a physical TM quantity converting device having damping characteristic changing means suitable for such a device.
〈従来例〉
る出力信号の振動を小さく抑える為、ダンピング機能が
設けられている。ダンピングを行う方式として、検出部
側で行う機械的なダンピング方式と、変換回路側で行う
電気的ダンピング方式の２通りがある。後者の電気的ダ
ンピング方式はコスト的に有利な為、広く採用されてい
る。しかしながら、差圧、圧力伝送器の場合、５〜１０
秒と長いダンピング時定数が必要でメジ、このような長
いダンピング時定数に得るには、時定数手段としてのコ
ンデンサにＩＪＩＦｖ上という大容量のものを用いなけ
ればならない。このようなコンデンサは大きなスペース
が必要であり、また本質安全防爆上問題があった。<Conventional example> A damping function is provided to suppress the vibration of the output signal. There are two types of damping methods: a mechanical damping method performed on the detection unit side and an electrical damping method performed on the conversion circuit side. The latter electrical damping method is widely used because it is cost-effective. However, in the case of differential pressure, pressure transmitters, 5 to 10
A damping time constant as long as seconds is required, and in order to obtain such a long damping time constant, a capacitor with a large capacity such as IJIFv must be used as a time constant means. Such capacitors require a large amount of space and have problems in terms of intrinsic safety.
本件出願人は、実願昭５８−８９００５号により、入刃
物理全に応じて変化する可変インピーダンスをこれに関
連したオンオフデユーティ比のパルス信号に変換し、こ
のパルス信号を平滑し直流電圧を得て、この直流電圧に
基づき装置出方を発信するようにした物理量変換装置に
おいて、小容量のコンデンサを用いて長いダンピング時
定数を実現する方法を提案した。この方法によれば、上
記直流電圧を得る平滑回路に時定数変更用の開閉手段を
設け、上記パルス信号よシ導いた分周パルスにょシ、上
記開閉手段を制御するものである。この回路において、
時定数の変更は、上記開閉手段駆動用のパルスに分周比
の異なる周波数パルスから所望のものを選択することＫ
よって行っていた。In Utility Application No. 58-89005, the applicant converted the variable impedance that changes depending on the physics of inserting the blade into a pulse signal with an on-off duty ratio related to this, smoothed this pulse signal, and converted it into a DC voltage. We proposed a method to realize a long damping time constant using a small capacitor in a physical quantity conversion device that transmits the device output based on this DC voltage. According to this method, a switching means for changing the time constant is provided in the smoothing circuit for obtaining the DC voltage, and the switching means is controlled by the frequency-divided pulse derived from the pulse signal. In this circuit,
To change the time constant, select a desired one from frequency pulses with different frequency division ratios for the pulse for driving the opening/closing means.
So I went.
〈従来技術の欠点〉
Ｌ カＬ ｆｘ カラ、このような方法ではダンピング
時定数の変更はステップ状にしか変えられず、連続可変
が出来なかった。<Disadvantages of the Prior Art> In this method, the damping time constant could only be changed in steps, and could not be varied continuously.
〈発明の概要〉
本発明の目的は、連続可変でき、且つ長いダンピング時
定数特性を持った物理量変換装置を実現することを目的
とする。本発明の構成は、入力物理量に応じて変化する
可変インピーダンスをこれに関連したオンオフデユーテ
ィ比のパルス信号に変換する検出回路と、時定数変更用
開閉手段及びこれに接続された時定数可変手段とを持っ
た上記パルス信号を平滑する平滑回路と、この平滑回路
の直流電圧に基づき装置出力を発信する変換回路と、上
記検出回路からのパルス信号を分周し、上記開閉手段駆
動用のオンオフデユーティパルスを発生する時定数制御
信号発生回路とを設け、長いダンピング時定数を得るよ
うにすると共に、これを連続的に可変出来るようにした
。<Summary of the Invention> An object of the present invention is to realize a physical quantity conversion device that is continuously variable and has long damping time constant characteristics. The configuration of the present invention includes a detection circuit that converts a variable impedance that changes according to an input physical quantity into a pulse signal with an on-off duty ratio related thereto, a time constant changing opening/closing means, and a time constant variable means connected thereto. a smoothing circuit that smoothes the pulse signal, and a conversion circuit that transmits a device output based on the DC voltage of the smoothing circuit; A time constant control signal generation circuit that generates a duty pulse is provided to obtain a long damping time constant and to be able to continuously vary this.
〈実施例〉
図は本発明の実施例装置の回路図を示す。本図において
一点鎖線で囲まれた部分！は検出器部分、部分■は検出
回路部分、部分■はこの検出回路からのオンオフデユー
ティパルス信号’ｔＮ流出力として発信する変換回路部
分、部分■は時定数制御信号発生回路部分である。<Embodiment> The figure shows a circuit diagram of an embodiment device of the present invention. The part surrounded by a dashed line in this figure! 2 is a detector portion, a portion (2) is a detection circuit portion, a portion (2) is a conversion circuit portion that outputs an on-off duty pulse signal 'tN from this detection circuit, and a portion (2) is a time constant control signal generation circuit portion.
検出器部分Ｉにおいて、本実施例では圧力、或いは力な
どの入力物理量に応じて変化する可変静電容量ＣＨ２Ｃ
Ｌよυなる差動型容量センサが用いられている。In the detector part I, in this embodiment, a variable capacitance CH2C changes depending on an input physical quantity such as pressure or force.
A differential capacitive sensor L and υ is used.
検出回路部分■は、例えば先の公開、特開昭５７−１４
７：１４号に示される如き、回路構成が簡単で浮遊容量
の影響を受けにくい回路が用いられる。本回路において
、Ｇ□、Ｇ２は出力側が可変静電容量ＣＨ＋ＣＬの１極
に接続□されたナンドゲー）、Ｇ３は入力にナンドゲー
）Ｇ工、Ｇ２の出力が接続されたナントゲートで出力側
は定値電流制限回路ＣＣ１の一端に接続されている。こ
の定位電流制限回路の他端は可変容量ＣＨ２ＣＬのもう
一方の極で、共通接続点としての可動電極に接続てれて
いる。ｃｏＭｌ′ｉ、一方の入力が上記可動電極と定位
電流制限回路ＣＣ□との接続点Ａに接続され、他方の入
力に基準電源が接続された比較器で、ここからの出力パ
ルスは後段のカウンタＣＴ工に与えられると同時に、イ
ンバータＧ４ヲ介しナントゲートＧ□、Ｇ２の一方の入
力に与えられている。また、ナントゲートＧ２の他方の
入力にはカウンタＣＴ１からのパルス信号が加えられ、
ナントゲートＧ１の他方の入力には、インバータＧ５で
カウンタＣＴ１の出力を反転させたパルス信号が加えら
れている。The detection circuit part
7:14, a circuit with a simple circuit configuration and less susceptible to stray capacitance is used. In this circuit, G□, G2 are Nando gates whose output sides are connected to one pole of variable capacitance CH + CL, G3 is Nando gates whose inputs are connected to the outputs of G and G2, and the output side is a constant value. It is connected to one end of the current limiting circuit CC1. The other end of this localization current limiting circuit is the other pole of the variable capacitor CH2CL, and is connected to the movable electrode as a common connection point. coMl'i is a comparator whose one input is connected to the connection point A between the movable electrode and the localization current limiting circuit CC At the same time, it is applied to one input of the Nandt gates G□ and G2 via the inverter G4. Further, a pulse signal from the counter CT1 is applied to the other input of the Nant gate G2,
A pulse signal obtained by inverting the output of the counter CT1 by an inverter G5 is applied to the other input of the Nandt gate G1.
このような検出回路の動作は、先の特開昭５７−１４７
．１４ 号に詳細に説明されているので、詳しい説明は
省略するが、ゲート回路Ｇ□〜Ｇ５はゲートＧ□。The operation of such a detection circuit is described in the previous Japanese Patent Application Laid-Open No. 57-147.
．． 14, so a detailed explanation will be omitted, but the gate circuits G□ to G5 are gates G□.
Ｇ２の出力を可変静電容量ｃ１１．ｃＬの一極に選択的
に加える切換手段として作用する。一方の可変静電容量
にゲート出方が与えられているとき、この容量への充放
電は定値電流制限回路ｃｃ１を介して行なわれ、この可
変静電容、（ｉ（に応じた幅のパルス信号が比較器ＣＯ
Ｍから出力される。このパルス幅信号はカウンタｃＴ１
に加えられ、一定数パルスがカウントされると、カウン
トの出力が反転し、次いで他方の可変静電容量が測定さ
れる。この結果、カウンタＣＴ１の出力にオンオフデユ
ーティ比ｃＬｌ（Ｃ１□十ＣＬ）なる、上記可変静電容
量に関連した主信号パルスが得られる。The output of G2 is connected to the variable capacitor c11. It acts as a switching means to selectively apply to one pole of cL. When one variable capacitor is given a gate output, charging and discharging to this capacitor is performed via a constant current limiter circuit cc1, and a pulse signal with a width corresponding to this variable capacitor, (i( is the comparator CO
Output from M. This pulse width signal is applied to the counter cT1.
Once a certain number of pulses have been counted, the output of the count is inverted and the other variable capacitance is then measured. As a result, a main signal pulse related to the variable capacitance with an on-off duty ratio cLl (C1□0CL) is obtained at the output of the counter CT1.
変換回路部分■において、ＦＬよけ検出回路■がら与え
られるオンオフデユーティパルス信号を平滑する平滑回
路で、回路中に時定数変更用開閉手段ＳＷ と時定数可
変用の可変抵抗器ＶＲ□が設けら１
れている。Ａ工は非反転入力端に平滑回路ＦＬ１からの
直流電圧が加えられたバッフ丁増幅器である。In the conversion circuit section (■), a smoothing circuit smoothes the on-off duty pulse signal given by the FL avoidance detection circuit (■), and a switching means SW for changing the time constant and a variable resistor VR□ for changing the time constant are installed in the circuit. et al.1. Part A is a buffer amplifier to which the DC voltage from the smoothing circuit FL1 is applied to the non-inverting input terminal.
Ａ２は非反転入力端にバッフ丁増幅器Ａ工の出力電圧に
可変抵抗ｖＲ２よシ与えられたバイアス電圧を加算した
電圧が加えられ、反転入力端に帰還抵抗Ｒ１に発生した
帰還電圧が加えられた演算増幅器で、この出力は出力電
流制御用のトランジスタＴｒ□のペースに接続されてい
る。Ｔ□、Ｔ２は正、負端子ス１で、一対の電線Ｌ□、
Ｌ２によって負荷Ｒｔ及び電源Ｅｓに接続されている。A2 has a non-inverting input terminal with a voltage added to the output voltage of the buffer amplifier A and a bias voltage applied to a variable resistor vR2, and a feedback voltage generated in a feedback resistor R1 with an inverting input terminal. It is an operational amplifier, and its output is connected to the pace of the transistor Tr□ for output current control. T□, T2 are positive and negative terminals 1, and a pair of electric wires L□,
It is connected to the load Rt and the power source Es by L2.
ＣＣ２は定電流回路、ｚＤは回路電源として一定電圧ｖ
ｌ供給するゼナーダイオードである。CC2 is a constant current circuit, zD is a constant voltage v as a circuit power supply
It is a zener diode that supplies
このような変換回路において、前段の検出回路■から与
えられるパルス信号は平滑回路ＦＬ１において平滑でれ
直流電圧に変換てれ、この直流電圧構成するもので、後
出の時定数制御信号発生回路■からの分周オンオフデユ
ーティパルスによシ駆動される時定数変更用開閉手段Ｓ
Ｗ□、及び時定数可変用の可変抵抗器ＶＲ□を具備する
。この部分については、次の時定数制御信号発生回路■
の所で説明を行う。In such a conversion circuit, the pulse signal given from the previous stage detection circuit (■) is smoothed and converted into a DC voltage in the smoothing circuit FL1, and this DC voltage is configured by the time constant control signal generation circuit (■) described later. Opening/closing means S for changing the time constant driven by the divided on/off duty pulse from
W□ and a variable resistor VR□ for variable time constant. For this part, please refer to the following time constant control signal generation circuit■
An explanation will be given below.
時定数制御信号発生回路■において、ＣＴは入力Ｓｏに
カウンタＣＴ１からのパルス信号が加えられているカウ
ンタで、出力側圧例えば入力パルスに対し１／２ 、
１／４ 、 １／８ 、１／１６．１／３２．１／６４
０分周此の周波数パルスを出方する端子を持つ。各出力
はアンドゲートＧ６に加えられ、ここがら分周比１／６
４のパルス出力が出力される。In the time constant control signal generation circuit (2), CT is a counter to which a pulse signal from the counter CT1 is added to the input So, and the output side pressure is, for example, 1/2 of the input pulse,
1/4, 1/8, 1/16.1/32.1/64
It has a terminal that outputs a pulse with this frequency divided by 0. Each output is added to AND gate G6, where the frequency division ratio is 1/6.
4 pulse outputs are output.
平滑回路ＦＬ工に設けられた時定数変更用開閉手段ＳＷ
工は分周比１１６４のパルス信号によって駆動／される
。開閉手段５ＷＬＩ−ｉパルス信号が与えられている時
間だけ閉じ、その他の時間は信号電圧を保持する。この
ような動作により、平滑回路ＦＬ□は時定数が大きくな
ったと同じように動作する。Opening/closing means SW for changing time constant provided in smoothing circuit FL construction
The device is driven/driven by a pulse signal with a frequency division ratio of 1164. The opening/closing means 5WLI-i is closed only during the time when the pulse signal is applied, and the signal voltage is maintained at other times. Due to this operation, the smoothing circuit FL□ operates in the same manner as if the time constant had been increased.
更に、この平滑回路の時定数の変更は、可変抵抗器ＶＲ
□を調整して行う。即ち、可変抵抗器ｖｎ□の抵抗値を
Ｒ１との抵抗の分割比をα、コンデンサＣ□の容Ｒ’ｋ
Ｃとして、平滑回路ＦＬ□の時定数τは以下のように表
わされる。Furthermore, the time constant of this smoothing circuit can be changed using a variable resistor VR.
Adjust □. That is, the resistance value of the variable resistor vn□ is the resistance division ratio with R1, and the capacitance R'k of the capacitor C□ is
As C, the time constant τ of the smoothing circuit FL□ is expressed as follows.
τ ＝ ６４瞼α・Ｒ−Ｃ
可変抵抗器■□を調整して、αを０〜１の間で変化させ
れば、時定数は、０〜６４°Ｒ−Ｃの間で連続的に変化
てせることかできる。τ = 64 eyelids α・R-C If you adjust the variable resistor ■□ and change α between 0 and 1, the time constant will change continuously between 0 and 64°R-C. I can do it.
伺、時定数の変更は、コンデンサｃ１を可変にすること
によっても良い。また、上記実施例の説明では分周比１
１６４のパルス信号だけが開閉手段ＳＷ□駆動用に用い
られているが、こｉＫ限らず、カウンタＣＴＩよりの分
周比が１／８．１／１６／、 １／３２のパルスも使用
出来るように切換スイッチを設け１これらパルスから所
望のパルスを選択して開閉手段ｓｗ１に加え、時定数の
粗調整を行い、その後で可変抵抗器ＶＲ□を調整して時
定数の微調整を行うようにしても良い。However, the time constant may be changed by making the capacitor c1 variable. In addition, in the description of the above embodiment, the frequency division ratio is 1.
Only the 164 pulse signal is used to drive the opening/closing means SW□, but it is possible to use not only this iK but also pulses with a frequency division ratio of 1/8, 1/16/, and 1/32 from the counter CTI. A changeover switch is provided in 1 to select a desired pulse from these pulses and apply it to the opening/closing means sw1 to roughly adjust the time constant, and then adjust the variable resistor VR□ to finely adjust the time constant. It's okay.
また、カウンタＣＴ２への入力信号は、カウンタＣＴ□
からのパルス信号に限らず、比較器Ｃα１からの周波数
の高いパルス信号を用いることも出来る。In addition, the input signal to the counter CT2 is the input signal to the counter CT□
In addition to the pulse signal from the comparator Cα1, a high frequency pulse signal from the comparator Cα1 can also be used.
この場合には、時定数変更用開閉手段ｓｗ１にょるブン
プリング周期が短くなる為、測定圧の脈動の周波数が高
いときに有効でろる。In this case, since the boom-pulling period by the time constant changing opening/closing means sw1 becomes shorter, it is effective when the frequency of pulsation of the measured pressure is high.
く効果〉
本発明によれば、平滑回路に時定数変更用の開閉手段を
設け、検出回路からのオンオフデユーティパルス信号に
基づき上記開閉手段駆動用のオンオフデユーティパルス
を作り、これによシ上記開閉手段を駆動するようにする
と共に、この開閉手段に時定数可変手段を接続し、上記
平滑回路の時定数を可変出来るようにしたもので、簡単
な構成で、小容量のコンデンサに拘らず、長いダンピン
グ時定数が得られ、且つこれを連続的に可変することが
出来る。Effects> According to the present invention, the smoothing circuit is provided with a switching means for changing the time constant, and an on-off duty pulse for driving the switching means is created based on the on-off duty pulse signal from the detection circuit. In addition to driving the opening/closing means, a time constant variable means is connected to the opening/closing means so that the time constant of the smoothing circuit can be varied.It has a simple configuration and can be used regardless of the small capacitance of the capacitor. , a long damping time constant can be obtained, and this can be continuously varied.
図は本発明の実施例装Ｖ￥を示す回路図でβる。 The figure is a circuit diagram showing an embodiment of the present invention.
Claims (1)
これに関連したオンオフデユーティ比のパルス信号に変
換する検出回路と、時定数変更用開閉路の直流電圧に基
づき装置出力を発信する変換回路と、上記検出回路から
のパルス信号を分周し、上記開閉手段駆動用のオンオフ
デユーティパルスを発生する時定数制御信号発生回路と
を具備した物理全変換装置。A detection circuit that converts a variable impedance that changes according to the physical quantity of the large blade into a pulse signal with an on-off duty ratio related to this, and a conversion circuit that transmits a device output based on the DC voltage of the switching circuit for changing the time constant. and a time constant control signal generation circuit that frequency-divides the pulse signal from the detection circuit and generates an on-off duty pulse for driving the switching means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20672883A JPS6098310A (en) | 1983-11-02 | 1983-11-02 | Physical quantity converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20672883A JPS6098310A (en) | 1983-11-02 | 1983-11-02 | Physical quantity converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6098310A true JPS6098310A (en) | 1985-06-01 |
Family
ID=16528119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20672883A Pending JPS6098310A (en) | 1983-11-02 | 1983-11-02 | Physical quantity converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6098310A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008187982A (en) * | 2007-02-07 | 2008-08-21 | Yanmar Co Ltd | Working vehicle |
-
1983
- 1983-11-02 JP JP20672883A patent/JPS6098310A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008187982A (en) * | 2007-02-07 | 2008-08-21 | Yanmar Co Ltd | Working vehicle |
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