JPS6225718Y2 - - Google Patents
Info
- Publication number
- JPS6225718Y2 JPS6225718Y2 JP10716579U JP10716579U JPS6225718Y2 JP S6225718 Y2 JPS6225718 Y2 JP S6225718Y2 JP 10716579 U JP10716579 U JP 10716579U JP 10716579 U JP10716579 U JP 10716579U JP S6225718 Y2 JPS6225718 Y2 JP S6225718Y2
- Authority
- JP
- Japan
- Prior art keywords
- electric meter
- meter
- electrical
- amplifier
- braking
- 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
Links
- 238000001514 detection method Methods 0.000 claims 1
- 230000004907 flux Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案は可動コイル型指示電気計器を用いた電
気指示装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical indicating device using a moving coil type electrical indicating meter.
従来、可動コイル型指示電気計器を用いた電気
指示装置は、第１図に示すように、被指示信号を
駆動回路（増幅回路）１を介して増幅した後、可
動コイル型指示電気計器２（以下電気計器と称す
る）に入力し、この電気計器２の指針の振れ角に
よつて被指示信号のレベルを指示するようにした
構成である。 Conventionally, as shown in FIG. 1, an electrical indicating device using a moving coil type electric indicating meter amplifies a signal to be indicated via a drive circuit (amplifying circuit) 1, and then amplifying the signal to be indicated by a moving coil type electric indicating meter 2 ( This configuration is such that the level of the indicated signal is indicated by the swing angle of the pointer of the electrical meter 2 (hereinafter referred to as an electric meter).
このような構成において、電気計器２の運動方
程式は、
ｍｄ２θ／ｄｔ２＋（ｒ＋Ｇ２／Ｒ）ｄθ／ｄｔ＋τ
θ＝ＧＶ／Ｒ…(1)
ただし Ｒ＝Re＋Rg
Ｇ＝nBA
と表わされる。 In such a configuration, the equation of motion of the electric meter 2 is md 2 θ/dt 2 + (r+G 2 /R) dθ/dt+τ
θ=GV/R...(1) However, it is expressed as R=Re+Rg G=nBA.
(1)式から、制動率δ及び制動係数ζはそれぞれ
次のようになる。 From equation (1), the braking rate δ and the braking coefficient ζ are respectively as follows.
となる。ここに τ：制御定数 ｒ：制動定数 ｎ：コイル巻数 Ｂ：空隙の磁束密度 Ａ：コイルの面積 ｍ：可動部の慣性モーメント ωｏ：電気計器の固有角周波数 θ：電気計器の回転角 Re：電気計器側からみた騒動回路の抵抗 Rg：電気計器の抵抗 Ｖ：電気計器の駆動電圧 である。 becomes. Here, τ: Control constant r: Braking constant n: Number of coil turns B: Magnetic flux density of air gap A: Area of coil m: Moment of inertia of moving part ωo: Natural angular frequency of electric meter θ: Rotation angle of electric meter Re: Electricity Resistance of the disturbance circuit seen from the meter side Rg: Resistance of the electric meter V: Drive voltage of the electric meter.
第２図は、電気計器２にステツプ状の電圧を印
加した場合の応答を表わしたものであり、電気計
器２は臨界制動（制動係数ζ＝１）又はほぼ臨界
制動に近い範囲で駆動され、指針が入力信号に対
応した振れ角に最も速く停止するような状態で使
用されることが望ましい。 FIG. 2 shows the response when a step voltage is applied to the electric meter 2, and the electric meter 2 is driven in a range of critical braking (braking coefficient ζ=1) or almost critical braking, It is desirable to use the pointer in such a state that it stops at the deflection angle corresponding to the input signal as quickly as possible.
ところが、入力信号に忠実に応答して指示する
目的から、電気計器２として高速応答型のものが
用いられるが、この型のものは固有角周波数ωｏ
が高く、電気計器側からみた駆動回路の抵抗Re
を「０」としても、ζ＜１となり、電気計器２が
制動不足の状態で駆動されるために、第２図に示
すようなオーバーシユートやリンキングを生じる
応答特性となり、指針が所定の振れ角に停止する
のに時間がかかり、入力信号に対する忠実な応答
は不可能であつた、また、電気計器２の可動部に
おいて、空隙の磁束密度Ｂを大きくすることによ
り、制動係数ζを「１」に所づけることができる
が、この場合は所望の磁束密度Ｂを得るために磁
石が大型、かつ高価にならざるを得ない等の欠点
があつた。 However, for the purpose of faithfully responding to input signals and giving instructions, a high-speed response type is used as the electric meter 2, but this type has a natural angular frequency ωo
is high, and the resistance Re of the drive circuit seen from the electric meter side
Even if it is set to 0, ζ < 1, and the electric meter 2 is driven with insufficient braking, resulting in a response characteristic that causes overshoot and linking as shown in Figure 2, and the pointer does not oscillate to a specified level. It took time to stop at a corner, and a faithful response to the input signal was impossible.In addition, by increasing the magnetic flux density B of the air gap in the movable part of the electric meter 2, the braking coefficient ζ was reduced to 1. '', but in this case there are disadvantages such as the magnet must be large and expensive in order to obtain the desired magnetic flux density B.
本考案はこのような従来欠点を改良したもの
で、以下図について説明する。 The present invention improves on such conventional drawbacks, and will be explained below with reference to the drawings.
本考案は電気計器の駆動回路として負出力イン
ピーダンス回路を用い、電気計器側からみた駆動
回路の抵抗を負にすることによつて、電気計器の
制動抵抗を小ならしめて制動係数を「１」又は
「１以上」の値にしたことを特徴とするものであ
る。 The present invention uses a negative output impedance circuit as a drive circuit for an electric meter, and by making the resistance of the drive circuit negative as seen from the electric meter side, the braking resistance of the electric meter is reduced and the braking coefficient is set to ``1'' or It is characterized by having a value of "1 or more."
以下第３図において、一実施例として電気入力
信号のピーク値を指示するようにしたピークメー
タ回路について説明する。 Referring now to FIG. 3, a peak meter circuit that indicates the peak value of an electrical input signal will be described as an example.
指示されるべき電気入力信号を公知のピークホ
ールド回路３を介してそのピーク値を取出し、こ
のピーク値を負出力インピーダンス回路４を介し
て電気計器２に入力した構成である。 The configuration is such that the peak value of the electrical input signal to be indicated is taken out via a known peak hold circuit 3, and this peak value is input to the electrical meter 2 via a negative output impedance circuit 4.
負出力インピーダンス回路４は、同図に示すよ
うに電気入力信号のピーク値を抵抗R1を介して
演算増幅器５の反転入力に入力すると共にその出
力を帰還用抵抗R2を介して上記反転入力に帰還
し、上記演算増幅器５の非反転入力を直列接続し
た抵抗R3，R4を介して接地すると共に、両抵抗
R3，R4の接続点と上記演算増幅器５の出力との
間に電気計器２を接続した構成である。すなわ
ち、上記被指示電気入力信号を演算増幅器５およ
び負帰還回路によつて構成される負帰還型増幅器
によつて増幅し、その出力によつて電気計器２を
駆動するとともに、この電気計器２に流れる電流
に比例した電圧を上記負帰還型増幅器に正帰還す
ることにより、電気計器２を負の出力インピーダ
ンスを有する負出力インピーダンス回路４によつ
て駆動するようにしたものである。 As shown in the figure, the negative output impedance circuit 4 inputs the peak value of the electrical input signal to the inverting input of the operational amplifier 5 via the resistor R1 , and outputs the peak value to the inverting input via the feedback resistor R2 . The non-inverting input of the operational amplifier 5 is grounded via series-connected resistors R3 and R4 , and both resistors
This configuration has an electric meter 2 connected between the connection point of R 3 and R 4 and the output of the operational amplifier 5. That is, the instructed electrical input signal is amplified by a negative feedback amplifier constituted by an operational amplifier 5 and a negative feedback circuit, and its output drives the electrical meter 2. By positively feeding back a voltage proportional to the flowing current to the negative feedback amplifier, the electric meter 2 is driven by a negative output impedance circuit 4 having a negative output impedance.
以上の構成によれば、電気計器２側からみた駆
動回路の抵抗Re、つまり電気計器２の外部制動
抵抗Reは、負出力インピーダンス回路４の出力
インピーダンス
Re＝−Ｒ２／Ｒ１・R4
となる。 According to the above configuration, the resistance Re of the drive circuit as seen from the electric meter 2 side, that is, the external braking resistance Re of the electric meter 2, is the output impedance of the negative output impedance circuit 4 Re=-R 2 /R 1 · R 4 Become.
従つて、(3)式において、外部制動抵抗Re＜
０、つまり、この外部制動抵抗Reと電気計器２
の抵抗Rgの和である制動抵抗Ｒを上記抵抗Rgよ
り小さくすることによつて、(3)式の分子
ｎ＋（ｎＢＡ）／Ｒｅ＋Ｒｇ
を大ならしめ、かつ、抵抗R1，R2，R4を適当に
定めることによつて、制動係数ζを「１」又は
「１以上」の値に設定することができ、電気計器
２の応答にオーバーシユートやリンキングの生じ
ない、指針が所定の振れ角に停止する時間が短縮
された駆動を行なうことができる。 Therefore, in equation (3), external braking resistance Re<
0, that is, this external braking resistance Re and electric meter 2
By making the braking resistance R, which is the sum of the resistances Rg of By appropriately determining the braking coefficient ζ, it is possible to set the braking coefficient ζ to a value of ``1'' or ``1 or more'', and the response of the electric meter 2 does not cause overshoot or linking, and the pointer has a predetermined deflection. It is possible to perform driving in which the time required to stop at a corner is shortened.
また、固有角周波数ωｏの大きな電気計器や空
隙の磁束密度Ｂの小さい小型の磁石を用いた汎用
の安価な電気計器においても、個々の電気計器の
特性に応じて外部制動抵抗Reを適当に設定し
て、所望の応答特性を実現できる利点を有する。 In addition, even in general-purpose, inexpensive electric meters that use electric meters with a large natural angular frequency ωo or small magnets with a small magnetic flux density B in the air gap, the external braking resistance Re can be set appropriately according to the characteristics of each electric meter. This has the advantage that desired response characteristics can be achieved.
第４図は負出力インピーダンス回路４の他の実
施例を示し、本実施例の出力インピーダンスは、
Re＝Rs（１−ＡＲ６／Ｒ５）
ただし、Ａは増幅器７の利得
となる。第５図は同、回路実施例である。 FIG. 4 shows another embodiment of the negative output impedance circuit 4, and the output impedance of this embodiment is Re=Rs(1-AR 6 /R 5 ), where A is the gain of the amplifier 7. FIG. 5 shows an example of the same circuit.
以上のように、本考案は負出力インピーダンス
回路４を介して電気計器２を駆動するようにした
ので、電気計器２の応答特性を容易に制御でき、
特に磁束密度Ｂの小さい小型の磁石を用いた安価
な高速応答型電気計器２においてもオーバーシユ
ートやリンキングのない最適な高速応答を実現で
き、被指示電気入力信号を忠実に指示することが
できる実用利点を有する。 As described above, in the present invention, the electric meter 2 is driven through the negative output impedance circuit 4, so the response characteristics of the electric meter 2 can be easily controlled.
In particular, even in an inexpensive high-speed response electric meter 2 that uses a small magnet with a low magnetic flux density B, optimal high-speed response without overshoot or linking can be achieved, and the specified electric input signal can be faithfully indicated. Has practical advantages.
第１図は従来の電気指示装置の構成を示す図、
第２図は電気指示計器の応答特性を示す図、第３
図は本考案の電気指示装置の構成を示す図、第４
図は同、他の実施例、第５図は同、回路実施例を
示す図である。
４は負出力インピーダンス回路、２は可動コイ
ル型指示電気計器である。
FIG. 1 is a diagram showing the configuration of a conventional electric indicating device.
Figure 2 shows the response characteristics of the electrical indicator;
Figure 4 shows the configuration of the electrical indicating device of the present invention.
The figure shows another embodiment of the same, and FIG. 5 shows a circuit embodiment of the same. 4 is a negative output impedance circuit, and 2 is a moving coil type indicating electric meter.
Claims (1)
幅器の出力を可動コイル型指示電気計器２の一方
の端子に接続し、当該可動コイル型指示電気計器
２の他方の端子を電流検出用抵抗R4を介して接
地するとともに、当該電流検出用抵抗R4に流れ
る電流に比例した電圧を上記増幅器に正帰還して
なる電気指示装置。 The indicated electrical input signal is input to an amplifier, the output of the amplifier is connected to one terminal of the moving coil type indicating electric meter 2, and the other terminal of the moving coil type indicating electric meter 2 is connected to a current detection resistor R4. An electrical indicating device that is connected to the ground through the current detecting resistor R4 and positively feedbacks a voltage proportional to the current flowing through the current detecting resistor R4 to the amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10716579U JPS6225718Y2 (en) | 1979-08-01 | 1979-08-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10716579U JPS6225718Y2 (en) | 1979-08-01 | 1979-08-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5625263U JPS5625263U (en) | 1981-03-07 |
| JPS6225718Y2 true JPS6225718Y2 (en) | 1987-07-01 |
Family
ID=29339803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10716579U Expired JPS6225718Y2 (en) | 1979-08-01 | 1979-08-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6225718Y2 (en) |
-
1979
- 1979-08-01 JP JP10716579U patent/JPS6225718Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5625263U (en) | 1981-03-07 |
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