JPS5995419A - Measurement system - Google Patents
Measurement systemInfo
- Publication number
- JPS5995419A JPS5995419A JP57206339A JP20633982A JPS5995419A JP S5995419 A JPS5995419 A JP S5995419A JP 57206339 A JP57206339 A JP 57206339A JP 20633982 A JP20633982 A JP 20633982A JP S5995419 A JPS5995419 A JP S5995419A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- measuring device
- measurement
- selection
- range measuring
- 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
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
Landscapes
- Engineering & Computer Science (AREA)
- Technology Law (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、測定システムに関するものであって、詳しく
は、大レンジ測定器と小レンジ測定器とを有機的に組み
合わせて精度良く連続測定が行えるようにしたシステム
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measurement system, and more specifically, an improvement to a system that organically combines a large range measuring device and a small range measuring device to perform continuous measurement with high accuracy. It is related to.
一般に、プロセス制御系の測定システムは、大レンジ測
定器と小レンジ測定器とを有機的に組み合わせて、粘度
良く連続測定を行うように構成されている。Generally, a process control measurement system is configured to organically combine a large range measuring device and a small range measuring device to perform continuous measurement with good viscosity.
第１図は、このような従来のシステムの一例を示すブロ
ック図であって、１は大レンジ測定器、２は小レンジ測
定器、５は演算器、４は係数器、５はローセレクタ、６
はハイリミッタ、７はハイセレクタである。大レンジ測
定器１及び小レンジ測定器２は、例えば流量計で−あっ
て、大レンジ測定器１は０〜６０ｋｇ／ｈの測定値の大
きさを０〜１０Ｖの電圧の大きさに変換して測定信号と
して送出する機能を有し、小レンジ測定器２は０〜２０
ｋｇ／ｈの測定値の大きさを０〜１０Ｖの電圧の大きさ
に変換して測定信号として送出する機能を有するもので
ある。演算器３は、大レンジ１ｌｔｊｌｌ定器１の測定
信号Ｅが７ ” ＩＬ Ｉ Ｘで表わされる場合に、出
力信号Ｅ２がＦ ” ａ２Ｘ±ｂになるように演算を行
うものである。FIG. 1 is a block diagram showing an example of such a conventional system, in which 1 is a large range measuring device, 2 is a small range measuring device, 5 is an arithmetic unit, 4 is a coefficient unit, 5 is a low selector, 6
is a high limiter, and 7 is a high selector. The large range measuring device 1 and the small range measuring device 2 are, for example, flowmeters, and the large range measuring device 1 converts the magnitude of the measured value of 0 to 60 kg/h into the magnitude of the voltage of 0 to 10 V. The small range measuring device 2 has the function of sending out a measurement signal from 0 to 20.
It has a function of converting the magnitude of the measured value of kg/h into the magnitude of the voltage of 0 to 10V and sending it out as a measurement signal. The calculator 3 performs calculations so that when the measurement signal E of the large range 1ltjll meter 1 is expressed as 7''IL IX, the output signal E2 becomes F''a2X±b.
係数器４は、小レンジ測定器２の測定信号Ｅ４の傾斜を
大レンジ測定器１の測定信号Ｅ、の傾斜と等しくするた
めのレンジ合わせ演算を行うものである。The coefficient unit 4 performs a range adjustment calculation to make the slope of the measurement signal E4 of the small range measuring instrument 2 equal to the slope of the measuring signal E of the large range measuring instrument 1.
例えば、ｓ、ｓｓｖでレンジを切り換えるものとすると
、演算器３の出力信号Ｅ２は３．３３Ｖの位置で測定信
号Ｅ１と交わって傾斜がａ、＜＆２であればよく、係数
器４の出力信号Ｅ５はＥ５＝ ０．３３３ Ｅ４で表わ
されるものであればよい。このような具体例において、
ローセレクタ５から送出される選択信号Ｅ３は、３．３
３ Ｖ以下の場合には演算器３の出力信号Ｅ２となｐ、
３．３３Ｖ以上の場合には大レンジ測定器１の測定信号
Ｅとなる。一方、ハイリミッタ６の出力信号Ｅは、係数
器４の出力信号Ｅの５．３３Ｖ以上が制５
限されたものとなる。これにより、ハイセレクタ７から
送出される選択信号Ｅ７は、３．３５Ｖ以下ではハイリ
ミッタ６の出力信号Ｅ６となり、３．ｓｓｖ以上ではロ
ーセレクタ５の選択信号Ｅ３となって、小レンジ測定器
２の測定信号Ｅに関連した信号Ｅ６と犬レンジ測定器１
の測定信号Ｅとが直線的に連続しま
たものとなる。For example, if the range is to be switched by s, ssv, the output signal E2 of the calculator 3 intersects the measurement signal E1 at a position of 3.33V, and the slope only needs to be a, <&2, and the output signal of the coefficient unit 4 E5 may be expressed as E5=0.333E4. In such a specific example,
The selection signal E3 sent from the low selector 5 is 3.3
If it is less than 3 V, the output signal E2 of the arithmetic unit 3 becomes p,
If it is 3.33V or more, it becomes the measurement signal E of the large range measuring device 1. On the other hand, the output signal E of the high limiter 6 is limited to 5.33V or more of the output signal E of the coefficient multiplier 4. As a result, the selection signal E7 sent from the high selector 7 becomes the output signal E6 of the high limiter 6 below 3.35V, and 3. ssv or more, it becomes the selection signal E3 of the low selector 5, and the signal E6 related to the measurement signal E of the small range measuring device 2 and the dog range measuring device 1
The measurement signal E and the measurement signal E continue linearly and become one again.
しかし、このような従来の構成によれば、演算器される
ものではないことから、レンジ切換点を変更する毎に演
算式を再設定しなければならず、操作性が劣るという欠
点がある。However, such a conventional configuration has the disadvantage that the arithmetic expression must be reset every time the range switching point is changed because it is not a calculator, and the operability is poor.
本発明は、このような従来の欠点を解決したものであっ
て、以下、図面を用いて詳細に説明する。The present invention solves these conventional drawbacks, and will be described in detail below with reference to the drawings.
第２図は、本発明の一実施例を示すブロック図であって
、第１図と同等部分には同一符号を付している。第２図
において、８は信号発生器、９は加減算器である。FIG. 2 is a block diagram showing one embodiment of the present invention, in which parts equivalent to those in FIG. 1 are given the same reference numerals. In FIG. 2, 8 is a signal generator and 9 is an adder/subtractor.
信号発生器８は、大レンジ測定器１と小レンジ測定器２
との間でのレンジ切換点の測定信号に対応した大きさの
設定信号Ｅを発生するものである。The signal generator 8 has a large range measuring device 1 and a small range measuring device 2.
It generates a setting signal E having a magnitude corresponding to the measurement signal at the range switching point between.
この設定信号Ｅ８は、ローセレクタ５．ハイセレクタ７
及び加減算器９にそれぞれ加えられる。加減算器９は、
信号発生器８の設定信号Ｅ８．ハイセレクタ７の選択信
号Ｅ及びローセレクタ５の選択信号Ｅ、。を入力として
Ｅ１１＝Ｅ９− ”ａ十Ｅ１０で表わされる加減算を行
い測定信号Ｅ１１を求めるものである。This setting signal E8 is applied to the low selector 5. High selector 7
and added to the adder/subtractor 9, respectively. The adder/subtractor 9 is
Setting signal E8 of signal generator 8. A selection signal E of the high selector 7 and a selection signal E of the low selector 5. With E11=E9-''a+E10 as input, addition and subtraction are performed to obtain the measurement signal E11.
第２図の具体的な動作例を、第１図の設定例に基づいて
説明する。A specific example of the operation shown in FIG. 2 will be explained based on the setting example shown in FIG. 1.
係数器４からは、大レンジ測定器１の測定信号Ｅ１の傾
斜と等しい傾斜の出力信号Ｅ５（Ｅ５＝ ０．３３３
Ｅ４）が送出される。一方、信号発生器８からは、レン
１の測定信号Ｅと設定信号Ｅ８とを比較し、測定器号Ｅ
が３．３３Ｖよりも大きい場合には測定信号Ｅ１を選択
信号Ｅ８として送出し、測定信号Ｅ１がＳ、５５Ｖ よ
りも小さい場合には設定信号Ｅ８を選択信号Ｅ、として
送出する。ローセレクタ５は、係数器４の出力信号Ｅ５
と設定信号Ｅ８とを比較し、出力信号Ｅ５が３．１５Ｖ
よりも小さい場合には出力信号Ｅ５を選択信号Ｅ１０と
して送出し、出力信号Ｅ５が３．３３Ｖよりも大きい場
合には設定信号Ｅ８を選択信号Ｅ１ｏとして送出する。The coefficient unit 4 outputs an output signal E5 with a slope equal to the slope of the measurement signal E1 of the large range measuring device 1 (E5 = 0.333
E4) is sent. On the other hand, the signal generator 8 compares the measurement signal E of the lens 1 with the setting signal E8, and outputs the measurement signal E.
When the measurement signal E1 is larger than 3.33V, the measurement signal E1 is sent out as the selection signal E8, and when the measurement signal E1 is smaller than S and 55V, the setting signal E8 is sent out as the selection signal E. The low selector 5 receives the output signal E5 of the coefficient unit 4.
and the setting signal E8, and the output signal E5 is 3.15V.
When the output signal E5 is smaller than 3.33V, the output signal E5 is sent out as the selection signal E10, and when the output signal E5 is larger than 3.33V, the setting signal E8 is sent out as the selection signal E1o.
これにより、加減算器９からは、０〜２ｏｋｇ／ｈの範
囲では小レンジ測定器２の測定信号Ｅ４に関連した出力
信号Ｅが測定信号Ｅ として送出５
１１
されることになり、２０〜６０ｋｇ１ｂの範囲では大レ
ンジ測定器１の測定信号Ｅが測定信号Ｅ１１として送出
されることになって、低レンジから高Ｖンジまで連続し
て精度良く測定を行うことができる。As a result, the output signal E related to the measurement signal E4 of the small range measuring device 2 is sent out as the measurement signal E5 from the adder/subtractor 9 in the range of 0 to 2 kg/h.
11, and in the range of 20 to 60 kg1b, the measurement signal E of the large range measuring device 1 will be sent out as the measurement signal E11, and measurement will be performed continuously with high accuracy from the low range to the high V range. be able to.
このような構成によれば、レンジ切換点に応じて信号発
生器の設定信号を調整すればよく、従来のように演算式
の設定に時間を要することはない。According to such a configuration, it is sufficient to adjust the setting signal of the signal generator according to the range switching point, and unlike the conventional method, it does not take time to set the arithmetic expression.
なお、上記実施例では、流量信号’６ｏ〜１０Ｖの統一
化された電圧に変換して信号処理する例について説明し
たが、これに限るものではなく、温度や圧力などの物理
量レヘル信号処理を行うようにしてもよいし、電流や周
波数などの信号形態に変換して信号処理を行うようにし
てもよい。In addition, in the above embodiment, an example was explained in which the flow rate signal is converted into a unified voltage of 6 to 10 V and signal processed, but the present invention is not limited to this, and physical quantity level signal processing such as temperature and pressure is performed. Alternatively, the signal may be converted into a signal form such as current or frequency and signal processing may be performed.
以上説明したように、本発明によれば、太レンジ測定器
と小レンジ測定器とを有機的に組み合わせて精度良く連
続測定が行える測定システムが実現でき、各種の測定に
好適である。As described above, according to the present invention, it is possible to realize a measurement system that can perform continuous measurements with high accuracy by organically combining a wide range measuring device and a small range measuring device, and is suitable for various measurements.
第１図は従来のシステムの一例を示すブロック図、第２
図は本発明の一実施例を示すプロ、７り図である。
１・・・大レンジ測定器、２・・・小−レンジ測定器、
５・・・ローセレクタ、７・・・ハイセＶクタ、８・・
・信号発生器、９・・・加減算器。Figure 1 is a block diagram showing an example of a conventional system, Figure 2 is a block diagram showing an example of a conventional system.
The figure is a seven-dimensional diagram showing one embodiment of the present invention. 1...Large range measuring device, 2...Small range measuring device,
5...Low selector, 7...High selector, 8...
・Signal generator, 9...addition/subtraction device.
Claims (1)
定器及び小レンジ測定器と、これら両側定器間のレンジ
切換点の測定信号に対応した太きさの設定信号Ｅ８を発
生する信号発生器と、犬レンジ測定器の測定信号と設定
信号とを比較して値の大きな信号を選択信号Ｅとして送
出するハイセレフタと、小レンジ測定器の測定信号と設
定信号とを比較して値の小さな信号を選択信号Ｅ１ｏと
して送出するローセレクタと、これら設定信号Ｅ８及び
選択信号”？、Ｅ１０を入力としてＥｌｌ ＝ Ｅ９−
”８” ”１０で表わされる加減算を行い測定信号Ｅ
１１を求める加減算器とからなる測定システム。Signal generation that generates a setting signal E8 of a thickness corresponding to the measurement signal of a large range measuring device and a small range measuring device arranged to measure a common measurement object and the range switching point between these two side measuring devices. A high selector that compares the measurement signal of the dog range measuring device with the setting signal and sends out the signal with a large value as the selection signal E, and a high selector that compares the measurement signal of the small range measuring device with the setting signal and sends out the signal with a large value as the selection signal E. A low selector that sends out a signal as a selection signal E1o, and inputs these setting signals E8 and selection signals "?" and "E10", and Ell = E9-.
Performs addition and subtraction represented by “8” and “10” and generates the measurement signal E.
A measuring system consisting of an adder/subtracter that calculates 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57206339A JPS5995419A (en) | 1982-11-25 | 1982-11-25 | Measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57206339A JPS5995419A (en) | 1982-11-25 | 1982-11-25 | Measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5995419A true JPS5995419A (en) | 1984-06-01 |
Family
ID=16521656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57206339A Pending JPS5995419A (en) | 1982-11-25 | 1982-11-25 | Measurement system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5995419A (en) |
-
1982
- 1982-11-25 JP JP57206339A patent/JPS5995419A/en active Pending
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