JPH0130405B2 - - Google Patents
Info
- Publication number
- JPH0130405B2 JPH0130405B2 JP56201339A JP20133981A JPH0130405B2 JP H0130405 B2 JPH0130405 B2 JP H0130405B2 JP 56201339 A JP56201339 A JP 56201339A JP 20133981 A JP20133981 A JP 20133981A JP H0130405 B2 JPH0130405 B2 JP H0130405B2
- Authority
- JP
- Japan
- Prior art keywords
- value
- output signal
- unit
- input
- section
- 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
- 238000006243 chemical reaction Methods 0.000 claims 4
- 238000009499 grossing Methods 0.000 claims 2
- 238000005070 sampling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Description
【発明の詳細な説明】
この発明は各種流量や濃度等の情報を監視する
計測器から出力される信号の処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing device for signals output from measuring instruments that monitor information such as various flow rates and concentrations.
前述した計測器の出力信号は普通直流電圧や直
流電流信号として記憶装置、印字装置、監視装置
や制御装置等に伝送されてくる。これら信号は上
記装置に入力されるが、それら信号はすべて測定
対象からの信号とは限らず、伝送線路に生じた外
乱による信号等が混在してくることがある。この
ため、外乱等の信号により各種装置が誤動作した
りするおそれが多分にある。上記外乱としては例
えば第1に電源や他系統の信号等に影響されて生
じる外乱と第2に計測器の原理等に係わる外乱が
ある。 The output signal of the above-mentioned measuring device is normally transmitted as a DC voltage or DC current signal to a storage device, a printing device, a monitoring device, a control device, etc. Although these signals are input to the above-mentioned apparatus, not all of these signals are necessarily signals from the object to be measured, and signals due to disturbances occurring in the transmission line may be mixed together. Therefore, there is a high possibility that various devices may malfunction due to signals such as disturbances. The above-mentioned disturbances include, for example, firstly, disturbances caused by the influence of power supplies and signals from other systems, and secondly, disturbances related to the principles of measuring instruments, etc.
前記第1の外乱には例えば計測器の電源等から
侵入する高周波等がある。これによる外乱が生じ
ると計測器の出力信号が小刻みに変動する要因と
なる。次に、第2の外乱には例えば、散乱光を利
用した計測器等がある。散乱孔の光量を計測する
際、計測器と被計測物との間に光が入射したりす
ると、得られる計測値には被計測物からの散乱光
に加えて、外乱としての光をも含んだ値となる。
また、計測器と被計測物との間に、光を遮ぎるよ
うな物質が存在するような状況の下では、そのよ
うな物質が計測器と被計測物との間に粉れこむた
びに、散乱の仕方が変化してしまう。このことは
検出原理に光線を使用するために生じる外乱であ
る。通常、計測器には増幅回路が組込まれている
ので、場合によつては上記外乱のために出力信号
が大きく変動するおそれがある。 The first disturbance includes, for example, a high frequency wave that enters from a power source of a measuring instrument or the like. When a disturbance occurs due to this, it becomes a factor that causes the output signal of the measuring instrument to fluctuate little by little. Next, the second disturbance includes, for example, a measuring device that uses scattered light. When measuring the amount of light from a scattering hole, if light enters between the measuring device and the object to be measured, the measured value obtained will include light as a disturbance in addition to the scattered light from the object to be measured. The value is .
In addition, in situations where there is a substance that blocks light between the measuring instrument and the object to be measured, whenever such a substance gets into the space between the measuring instrument and the object to be measured, , the method of scattering changes. This is a disturbance caused by the use of light beams as the detection principle. Since an amplifier circuit is usually built into a measuring instrument, there is a possibility that the output signal may fluctuate greatly due to the above-mentioned disturbance in some cases.
上記のように外乱があると計測値に誤つた値が
生じるため、普通これら外乱に対しては種々の対
策が施されている。例えば第1の外乱に対しては
電源から侵入する高周波を除去するため、時定数
を調節して応答を意織的に遅らせて、安定化を図
る回路を設ける手段がある。しかし、時定数をあ
まり長くすると応答性が低下する欠点が生じる。
また、第2の外乱に対しては、例えば計測器を使
用する環境条件を調整したり、使用条件を限定す
る等をして、原理等に係わる外乱が生じないよう
にしている。しかし、間欠的に光線が入射した
り、光線が遮ぎられたりするような状況がどうし
てもできる場合には、原理的にこの外乱を分離す
ることは困難である。 As mentioned above, the presence of disturbances causes erroneous measured values, and therefore various countermeasures are normally taken against these disturbances. For example, in response to the first disturbance, there is a means of providing a circuit that intentionally delays the response by adjusting the time constant in order to eliminate the high frequency waves that enter from the power supply, thereby achieving stabilization. However, if the time constant is made too long, there is a drawback that the responsiveness decreases.
In addition, with respect to the second disturbance, for example, the environmental conditions under which the measuring instrument is used are adjusted, the usage conditions are limited, etc., so that disturbances related to the principle etc. do not occur. However, if a situation in which light rays are intermittently incident or blocked is unavoidable, it is difficult in principle to separate this disturbance.
このため、近年、第1、第2の外乱を除去する
ために、外乱をデジタル的に処理する手段がなさ
れている。まず、第1の外乱に対しては、一定時
間間隔毎にサンプリングして得られるデジタル信
号(以下サンプリングデータと称す)をメモリに
記憶させ、現在時間までの一定サンプリングデー
タ数について平均値を演算する手段がある。また
サンプリングデータが得られる毎にデータを更新
して行く、いわゆる移動平均値法が利用されるこ
とが多い。この移動平均値法を式であらわすと次
のようになる。デジタル信号のサンプリング間隔
をΔt、現在時間をt、また、データ数をNとす
れば、
=1/N(xt-(o-1) For this reason, in recent years, in order to remove the first and second disturbances, means have been developed to digitally process the disturbances. First, for the first disturbance, digital signals obtained by sampling at fixed time intervals (hereinafter referred to as sampling data) are stored in memory, and an average value is calculated for a fixed number of sampling data up to the current time. There is a means. Also, a so-called moving average method is often used in which data is updated every time sampling data is obtained. This moving average value method can be expressed as follows. If the sampling interval of the digital signal is Δt, the current time is t, and the number of data is N, then = 1/N (x t-(o-1)
Claims (1)
タ信号に変換して出力する変換部と、求めるデー
タの期待値である平滑値Ynから1つ手前のN−
1番号の平滑値Yo-1を出力する記憶部と、この
記憶部から出力される平滑値Yo-1と前記変換部
の出力信号とが入力されて比較され、出力信号の
上下限の範囲を設定してその範囲内にある出力信
号だけを送出する入力値平滑値比較部と、この比
較部の出力信号に係数aを乗算する入力値係数乗
算部と、前記記憶部から出力される平滑値Yo-1
が入力され、この値に係数(1−a)を乗算する
平滑値係数乗算部と、この乗算部の出力信号と前
記入力値係数乗算部の出力信号とが入力され加算
処理されて出力される平滑値演算部と、この演算
部で演算された出力信号が入力され、前記変換部
の出力信号が比較部で設定した範囲内にある信号
のときには演算部の出力信号を求める平滑値とし
て前記記憶部に供給させるとともにその出力信号
が入力され、前記変換部の出力信号が比較部で設
定した範囲外にある信号のときには演算部の出力
信号を記憶部へは供給しないとともに求める平滑
値としては前回値が保持されるデジタル・アナロ
グ変換部とを備えた信号処理装置。1. A conversion unit that converts a fluctuating analog data signal into a digital data signal and outputs it, and a smoothed value Yn that is the expected value of the data to be obtained.
A storage unit outputs the smoothed value Y o-1 of number 1, and the smoothed value Y o-1 output from this storage unit and the output signal of the conversion unit are input and compared, and the upper and lower limits of the output signal are determined. an input value smoothing value comparison section that sets a range and sends out only output signals within the range; an input value coefficient multiplication section that multiplies the output signal of this comparison section by a coefficient a; and an input value coefficient multiplication section that outputs from the storage section. Smoothed value Y o-1
is input, and a smoothing value coefficient multiplication unit multiplies this value by a coefficient (1-a), and the output signal of this multiplication unit and the output signal of the input value coefficient multiplication unit are input, added, and output. A smoothed value calculation unit and an output signal calculated by this calculation unit are input, and when the output signal of the conversion unit is within the range set by the comparison unit, the output signal of the calculation unit is stored as a smoothed value. When the output signal of the conversion section is outside the range set by the comparison section, the output signal of the calculation section is not supplied to the storage section, and the smoothed value obtained is the previous smoothed value. A signal processing device comprising a digital-to-analog converter in which values are held.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56201339A JPS58103097A (en) | 1981-12-14 | 1981-12-14 | Signal processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56201339A JPS58103097A (en) | 1981-12-14 | 1981-12-14 | Signal processor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58103097A JPS58103097A (en) | 1983-06-18 |
JPH0130405B2 true JPH0130405B2 (en) | 1989-06-20 |
Family
ID=16439378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56201339A Granted JPS58103097A (en) | 1981-12-14 | 1981-12-14 | Signal processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58103097A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60177271A (en) * | 1984-02-22 | 1985-09-11 | Nippon Telegr & Teleph Corp <Ntt> | Detecting circuit for center value of signal varying with time |
JPS61195304A (en) * | 1985-02-26 | 1986-08-29 | Yokogawa Electric Corp | Instrument for measuring characteristic of sheet-like object |
JPH0695028B2 (en) * | 1985-09-03 | 1994-11-24 | トヨタ自動車株式会社 | Karman vortex sensor output signal processor |
JP2564831B2 (en) * | 1987-06-24 | 1996-12-18 | 株式会社島津製作所 | Intelligent recorder |
JPH02161307A (en) * | 1988-12-15 | 1990-06-21 | Matsushita Electric Works Ltd | Inspecting method for waving of plate |
JP6969264B2 (en) * | 2017-09-29 | 2021-11-24 | 株式会社アドヴィックス | Vehicle electronics |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4944912A (en) * | 1972-07-17 | 1974-04-27 | ||
JPS5567607A (en) * | 1978-11-17 | 1980-05-21 | Hajime Sangyo Kk | Pattern discrimination method |
-
1981
- 1981-12-14 JP JP56201339A patent/JPS58103097A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4944912A (en) * | 1972-07-17 | 1974-04-27 | ||
JPS5567607A (en) * | 1978-11-17 | 1980-05-21 | Hajime Sangyo Kk | Pattern discrimination method |
Also Published As
Publication number | Publication date |
---|---|
JPS58103097A (en) | 1983-06-18 |
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