JPS60112177A - Processor of moving average - Google Patents

Abstract

PURPOSE:To enable a device to have good trackability by detecting sudden changes in input data by comaring them with an output of moving average operation, and replacing prior-change data to post-change data among the input data. CONSTITUTION:Input data added to an input terminal IN enter a shift registor 2 through a sampling holding circuit 1. A comparator 9 compares inputted current data with an output of a moving average operation circuit 8, and judges whether or not the inputted data change suddenly. A comparator 10 judges whether or not the value sampled previously deviates from a moving average value. When both comparators 9 and 10 judge sudden changes in inputted data, they output the signal which switches respective changeover switches 23, 25 and 27 to the current value side. Thus, when inputted data change suddenly, the data inputted previous time, those inputted two times before and those inputted three times before can be switched to the current value; moving average processing with good trackability can be executed for sudden changes in inputted data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention 1] The present invention relates to an apparatus for performing moving average calculation processing on input data.

[Technical Background of the Invention] When a pulse input is obtained for each unit amount of liquid etc. and its instantaneous amount is calculated, the @viffl at that time is determined from the number of input pulses between +11, but the input If the pulse frequency is low, the number of pulses will be small, so
The weight of one pulse increases.

Therefore, data errors become large over a short period of time, so a moving average calculation is performed to improve accuracy.

For example, in the process of injecting a chemical liquid into city gas at a fixed ratio for colophoning, the set value of the chemical liquid flow rate is controlled to increase or decrease according to the increase/decrease in the city gas flow ω, and the actual flow rate of the chemical liquid associated with this is controlled by a flow oscillator. The configuration is such that the measured value is fed back to the chemical fluid flow controller to control the chemical fluid supply pump.

The pulse output of the flow rate oscillator is given, for example, every time a chemical solution is exchanged, and the interval between the pulses is one minute or more, and the weight of one pulse is extremely large. Therefore, feedback is provided to the flow rate controller 1-0- via the moving average calculation circuit.

[Problems with Background Art] Although accuracy can be improved by performing the moving average as described above, there is a problem in that transient responsiveness deteriorates.

In other words, if you are on the above side 43 and the set value of the chemical solution flow rate suddenly changes, the actual flow rate will change suddenly, but even at this sudden change, a moving average calculation is performed on the input data and the data before the change is taken into account. Therefore, there is a problem that the output change of the moving average calculation circuit becomes slow, and the ability to follow sudden changes in the input data, that is, the actual flow (2) becomes poor.

[Object of the Invention] The present invention is intended to improve the above-mentioned problems of the conventional technology, and its purpose is to provide a moving average processing device with good responsiveness to changes in input data.

F. Summary of the Invention In order to achieve the above object, the present invention is provided with a moving average calculating means for calculating and outputting a moving average of human horn data. and a means for replacing data before the change with data after the change among the input data to be subjected to the moving average calculation when the Yuka data suddenly changes.

[Embodiment of the Invention] FIG. 1 is a block diagram showing an embodiment of a moving average processing device according to the present invention.

In the figure, IN is an input terminal for receiving incoming data, and a sampling and holding circuit 1 is connected to this input terminal IN. A shift register 2 is connected to the output side of the ring hold circuit 1. The shift register 2 includes a first sample hold circuit 21 connected to the lean-pring bold circuit 1, a second sample hold circuit 22 connected to the output side of the circuit 21, and an output J'3 of the circuit 22. and the first 1 number hole 1~
a changeover switch 23 that inputs the output of the circuit 21 and outputs an input selected by a control signal to be described later;
A third ripple hold circuit 24 is connected to the output side of the second ripple hold circuit 22 across the circuit, and the output of the third ripple hold circuit 24 is connected to the output of the first ripple hold circuit 21. and a changeover switch 25 that outputs an input selected by a control signal to be described later, and a fourth ripple bold circuit 2G connected to the output side of the sample bold circuit 24 of the button 3 across the switch 25. A changeover switch 27 is provided which inputs the output J3 of the circuit 26 and the output of the first lean-pull hold circuit 21, and outputs the input J selected by the control signal of the rear j-ho. Each changeover switch 23. ．． 25.27 respectively switch between the hold values of the second, third and fourth lean pull holes 1 to circuits 22 and 24.26 and the current values entered in the shift 1 to registers 2. Line 4j. This switching will be done later,
This is done by the detection output of a means for detecting a sudden change in input data by comparing the moving average calculation output. i) The sampling and hold circuit 1 described in 0 is for rimbling the input data at a predetermined sampling period, and the shift 1 to register 2 are set so that the non-bling value is jittered in accordance with one non-bling period. It is configured to output a shift signal to each lean pull hold circuit 21, 22, 24, and 26. The output of register 2 to register 1 is input to number ring 1 drawn from the input end of register 2.
~output line 3 of circuit 1, first sample hold circuit 2
1, a third output line 5 drawn out from the output side of the changeover switch 23, and a fourth output line 6 drawn out from the output side of the changeover switch 25.
and a fifth output line 7 drawn out from the output side of the changeover switch 27. Each output line 3.4. ．． 5.
6.7 is connected to a moving average calculation circuit 8. Shil [
Therefore, the moving average calculation circuit 8 stores the current value and previous value sampled by the sample bold circuit 1, and
Depending on the switching of the changeover switches 23, 25, 27, the previous rimbling value following the previous value or the current value will be given.

9 is a comparator whose inputs are the signal on the output line 3 connected to the output side of the limp ring bold circuit and the signal line at the output end of the moving average arithmetic circuit 8. The value is compared with the calculated moving average value and it is determined whether the increase or decrease has occurred by more than a predetermined criterion value, that is, whether the current input data has suddenly changed.

10 is a comparator which receives the second output line 4 and the output line of the moving average calculation circuit 8, and outputs the previous value which has been limbed and calculates the moving average 1ird ratio φQ and C.
The output of comparator 9.10 is 1.;
N l) To circuit 1'1! ) obtained, comparison of both: fi9.1
If both 0 and 1 input voltage suddenly change, each selector switch 23, 25, 27 k: I
l! 'ijE IIcI side Ni9 exchange; t Outputs Rutame's Shinshi J.

h: Figure 2 is an explanatory diagram of the operation of the moving average processing 11! The pulse waveform 8i - fdi - 1000 is expressed. '￥21:i!l IJ acceptance human power data ・shi (J put (there, 1ri) 2 figures (J,
1) Iku-12) 1 is the current rt of Kaparism (+T
+, al-1 is 1゛1st i side, 'lt-1, a',
-3, ai-+i; L last time 1st shift v1-1 arc <
i, represents f1i'j before L. ShilζgatsuC
When 1 current 7j11 self a, is 1 numbered (312, shift 1 register 2, each ripple small circuit 21, 22.2/1.26 has people a', -1, aI
-, , ('j-B, a'1-j are held.

In this state, when the current 11Q aI is output from the small ring ring root circuit 1, each sample hold circuit 21, 22.2/I of the shift 1 register 2 is output.

The previous value a1-1, which was held from 26, "'
-” ” aj-? , di-10 are output. Each output ai, ai-l, ai-:L, ai-3, a
i-4- is connected to the moving average circuit 8 (two people are connected) at the end of each output line 3, 4.5, 6.7.As a result, the moving 1!equalizer circuit 8 converts the C moving average according to -1. Express the value a as CI,,I.Book 191
< is ζ゛, which takes the moving average of 5 points.

Is there a sudden change in the human data?
The calculation itt i, lf force according to Tsutomi's moving average is output from the moving average circuit circuit 8.

On the other hand, as shown in Figure 2! JJ, there is a sudden change in Uniman Academy.
- and r)j, when clH-1 increases rapidly, the comparator 9.10 detects the moving average ii'4'' output of the 1 circuit 8, -U, AND circuit 11 Through (shift 1 - register 2 8 off) (switch - 23
, 25° 27 to switch 'r'i.
d in Brazil 211 and the previous value +: ] i 1 and C human power - the rapid increase in the number of
, noise, J, and the influence of ℃, kneading (it can be determined arbitrarily depending on l, j, which is applied to the moving average., AN l) Switching signal from circuit 11 By changing the shift register 2, each output line 3.4. ! I, 6, 7, people, (UH, cli
l , iji , ai , +uI are output (and
The moving average circuit calculation will be outputted.

This Il'1 result is a sudden change +'+ii's 7゛-ri"j-1*
A knee 4, al child is replaced by ゛-ta ai after the crisis C゛, transfer ΦノJ'' L uniformll'1aI
(1(+) follows the twenty-nine variations of the input data -.

Expressing the above relationship generally, if there is no sudden change in the human power j'-ta, the moving average 1ii'jaH is -
1, and the platform where the Mi transformation occurred, that is, a',>ai
10K or ai-1>ai-1+/J'J"""a
l-, 1>ai-J l- again (yo)ku-1 1. Here, K is the judgment of comparator 9.10...; i; t
+5 (In my opinion, it is important to judge whether there has been a rapid increase or decrease based on whether the vessel is larger or smaller than the one that has a moving average value of -11〈!j)
j', r will be. k is the number of data to be replaced when there is a sudden change; in this example, it is a and a, and 'C' k
= 2 There is F.

Figure 3 shows an example of the responsiveness of the present invention to sudden changes in panoramic data, where (a) is the input data curve, (b) (
(C) is the response curve of the device according to the present invention, and (C) is the response curve of the conventional device. In the sad poem of the present invention, if there is a sudden change in the input data, the above-mentioned J. .

In the embodiment described above, the data ai-,, ai before the sudden change is
Although we have explained the case where -a, a;-ox is replaced with EAL after sudden change, it is also possible to replace it with the average value or additive average value of data a;, -1 after sudden change. Also, the above real jil! In the example, the hardware 414 is constructed, but it is also possible to change the configuration from scratch using a computer.

Note that the moving average calculation includes not only a moving average that applies weighting or changes the lean-bring period, but also includes a first-order filter, etc. This is the same as in b.

As explained above, according to the present invention, when a sudden change occurs in the input data, the data before the sudden change among the data to be subjected to the moving average is replaced with the data after the sudden change.
It is possible to provide a moving average processing device that can easily follow sudden changes in input data.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the moving average processing v2 position according to the present invention, FIG. 2 is an explanatory diagram of the operation of the configuration of FIG.
The figure shows an example of the responsiveness of the moving average processing device according to the present invention to sudden changes in input data. It is a diagram. 1... Zumbling hold circuit 2... Shift register 8... Moving average calculation circuit 9.10... Comparator 11... AND circuit 21.2
2゜24.26...Sample hold circuit 23.25.2
7...Switch switch

Claims (1)

[Claims] In a device that includes a moving average calculation means and outputs a moving average of input data, there is a means for detecting a sudden change in the input data by comparing it with the output of the moving average calculation, and a means for detecting a sudden change in the input data by comparing it with the output of the moving average calculation, and a means for calculating the moving average when the input data suddenly changes. A moving average processing device characterized in that it is provided with means for replacing data before the change with data after the change among the input data that is provided.