JPS6076609A - Measured-value processing device - Google Patents

Abstract

PURPOSE:To shorten the time required for the prediction computation of the final value of the measured values, by measuring a physical quantity at every specified time, obtaining at least three measured values, operating the computed value by a specified computing expression based on the measured values, and displaying the result. CONSTITUTION:In accordance with the timing, which is inputted from a clock generating part 4 at every specified time DELTAt, physical quantities T0, T1, and T2 are measured by a measuring part 1. Operation of the measured values is performed by an operating circuit 2 by using an expression. The result of the operation is displayed on a numerical value displaying part 3. By measuring the data only at the three points at the specified interval, the prediction computation of the final steady value of the measured values can be performed. The measuring time is largely reduced for the measuring purpose of obtaining an approximate value.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measured value processing device for quickly measuring a physical quantity that approaches a final normal value relatively slowly in h1 field control technology.

Generally, when measuring a physical quantity that converges exponentially, it takes time to measure its final value. Although there are few conventional techniques for predicting the final value, there is an example that indicates that the change in the measured value has become less than the current value by indicating that the current measured value is close to the final value. In this case, if the convergence of the measured values is slow, there is a drawback that it takes a long time to obtain the final predicted value.

An object of the present invention is to provide a complete measured value processing method that estimates the final value immediately after the start of measurement and allows the final value to be reached in a short time when the measured value approaches the final value exponentially. It is about providing.

The measured value processing device of the present invention calculates a certain physical quantity K per foot time.
m11 plus at least 3 measurements '10 m Il,
It is composed of a measuring means for obtaining Il, a calculating means for calculating the next calculated value T from the measured value of this measuring means, and a display means for displaying the calculated value Ti calculated by this calculating means.

The present invention assumes that physical quantities that are converging to steady-state values converge exponentially, and predicts and calculates final steady-state values from current measured values. By using the interval (denoted as △t) and the measured values of only three points (denoted as To, Tt*Tz), the final constant expected value (denoted as 1') is predicted and calculated using the following simple formula. This equation (1) is derived from the equation % of the measured value '1゛t at any time t, when the time redundancy is τ. It has no relation to the number τ or the time interval Δt, and is expressed only by the measured values at three points.

Next, an embodiment of the present invention will be described with reference to all the drawings. Fig. 1 shows an example of a state of convergence of both leg values using a glass. Figure 2 shows the final value Ti of the numerical sequence L in Figure 2, which is obtained by all the calculations of both numerical sequences in the case of τ = 1 minute and T = 1.
The calculation is as follows.

From these examples 2) and 3), it is clear that if the changes in the measured values become slower, the accuracy of the predicted values can be increased by widening the time interval. be.

In this embodiment, the physical quantity T is measured in the measurement unit 1 according to the timing manually inputted from the required time Δt@yc clock generation unit 4.
Measure the measured value 'l' s 'l'l s 'r,
These measured values are subjected to the calculation of equation (1) in the calculation circuit 2, and the calculation results are displayed on the numerical display section 3.

As explained above, in the present invention, it is possible to predict the final steady value of the measured value by simply adding up the data of three points at the -foot time interval, and it is possible to predict the final steady value of the measured value by simply knowing = approximately 111.
(If you are aiming for 11 legs, the time required for both legs can be significantly shortened.) This effect is more pronounced as the measurement value converges slower.

[Brief explanation of the drawing]

The if diagram is a graph of measured values that converge exponentially to the final steady-state value T, and Figure 2 is a graph of the measured values that converge exponentially to the final steady-state value T.
．． FIG. 3 is a diagram showing the measured values when Δt = 0.1 minute, and FIG. 1 is a block diagram of an embodiment of the invention. 1... Measuring section, 2... Arithmetic circuit, 3.
. . . display section; 4 . . . clock generation section.

Claims (1)

[Scope of Claims] Measuring means for measuring a certain physical quantity every foot time to obtain at least three measured values ToI T1 , T2 , and calculating means for calculating the next calculated value T t from the measured value of this measuring means. and display means for displaying the calculated value T calculated by the calculation means.