JPS5886419A - Operating system for water level - Google Patents

Abstract

PURPOSE:To calculate the change in a water level per unit time with less influence of waves by detecting the changing times of the water level, storing said times beforehand and permitting retrospective oprations of the past data. CONSTITUTION:Water level values are digitized in a water level outputting section 2, and are compared at every sampling time. When the measured water level value does not coincide with the measured water level value held in the 1st area of a water level stack 3, a comparator 6 generates an output signal. The measured water level value held in the 1st area of the stack 3 is set in the 2nd area and thereafter the measured water level values held in the respective areas are set respectively in the areas of the next stage. The output signal of the comparator 6 is transmitted to a timer stack 5 and a setter 7 for operating intervals as well. After repetition of a number of times, an operator 8 is operated to read the measured water level values ad accumulative sampling times respectively from the stack 3 and the stack 5, from which the average value in the change in the water level paer unit time is operated.

Description

[Detailed description of the invention] (Technical field of 11 inventions Honbi@Mori, it's about the water level calculation method.

41. When calculating the water level required in cases such as finding the storage amount that is the basis for determining the amount of water released from a dam.

The present invention relates to a water level calculation method that reduces errors caused by water waves to water level measurements.

(2) Background of the technology To prevent river flooding and secure water for drinking and irrigation, dams and layers are built upstream. In such mid-level dams, for example, the upper limit of the amount of water stored in the reservoir is set to prevent it from overflowing, such as in a dam. Then, water is discharged so as not to exceed this upper limit.

In order to perform this water discharge correctly, the amount of water stored in the reservoir is calculated by calculating the amount of water O per unit time. This amount of storage is calculated by measuring the water level of the reservoir, determining changes in this water level, and determining the amount of stored water corresponding to each water level using the following equation. Namely.

j j Te, V (Hs) −V (HM) Fi SotL, the amount of water stored at water levels H,,H, respectively, T is the water level when the water level is H
It shows the time required to go from l to Hm. To measure the water level in a reservoir, the water surface ripples due to the influence of the outside world such as wind and waves, and the measurement point changes depending on the size of these waves. In such cases, the water level measurements vary depending on which measurement point is taken, making it difficult to determine the true water level. In this way, if the true water level cannot be measured and an error occurs in water level measurement, the accuracy of calculating the storage amount will be poor. In the case of #Ia! This may lead to flooding, so
It was necessary to determine the water level according to the wave conditions on the water surface.

(3) Conventional technology and interlayer point Conventionally, the ninth K to determine the water level of a reservoir such as O above is 2.
There was one way. One of them is Tm 10 minutes, 30 minutes,
Keep T constant like 1 hour...

The water level H1*HM... during this time is measured. This method has the problem that it is difficult to detect sudden changes in the net zero storage amount because T must be heated very hot in order to reduce the influence of waves on the water surface. be. In addition, another method is (Hz
Hs) is kept constant and the time T required for this change is measured. Also in this case.

In order to reduce the influence of waves on the water surface, it is necessary to smooth H, , H, at certain time intervals, which poses a problem in that it takes time. As mentioned above, in the conventional method,
In either case, it takes time to determine the water level, and the storage volume based on this cannot be determined immediately, so in small-capacity dams, as mentioned above, people often lack proper judgment in the discharge operation.

(4) Purpose of the Invention As stated above, the present invention solves the problem that conventionally, the accuracy of calculating the storage amount is not good due to the influence of waves on the water surface, and there is a risk of misjudgment in the discharge operation based on this. In order to improve the water level, the water level value and its cumulative time are memorized and retained every time the water level changes, the number of times the water level becomes 1 is detected, and the data of the stored water level value and cumulative time is selected in accordance with this number of times. It is possible to go back to the past and read it out and calculate it.

It is designed to enable you to understand the true water usage situation in a short time and provides nine water level calculation methods.

(5) Structure of the Invention And to achieve the above object, the water level calculation method of the present invention includes a water level output section that digitizes and outputs a fixed value on the water level side, a timer, and data output from the water level output section. a first storage means for storing the cumulative time outputted from the timer, a second storage means for storing the cumulative time outputted from the timer corresponding to when data is stored in the jj1 storage means; A comparison means for comparing the latest data stored in the storage means, a counting means for counting the output signal of the comparison means, and a preselected number of data stored in the first storage means and the $2 storage. It is equipped with an arithmetic means that reads data from the means and performs an arithmetic operation.

The present invention is characterized in that the calculation means operates based on the output of the counting means.

Embodiment of the Invention Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a configuration diagram of this embodiment, and FIG. 2 is an operational diagram of this embodiment.

In the figure, 1 is the water level input terminal, and )? The measured value of the water level needle that detects the water level of the water leak is transmitted.

Reference numeral 2 denotes a water level output section, which digitizes the analog signal of the nine water level values inputted to the input terminal.

This digitized data is stored in a water level stack 5, which will be described later.
This signal is sent to the comparator 6.

3 is a water level stack, which sequentially stores n pieces of data that are different from the preceding data among the sampled data outputted by the water level output section 2, from the first area to the staff area, and sequentially stores data in order from the last stored data. It is a good idea to be able to read any number of data by going back to the past.

4 is a timer which specifies the sampling time T1 for comparing the nine data sent from the water level output section 2 in a sampling manner, and also specifies the O cumulative data from the first data for the data to be sampled. It outputs time T.

5 counts in a timer stack, sets the data corresponding to the data stored in the water level stack, 9 and IO stores n pieces of the cumulative time T in sequence from the first area to the nth area bottle; It is rounded so that any number of cumulative times can be read out from the stored cumulative time later by going back to the past.

A comparator consisting of a 6-wire, for example, l1X-OR circuit,
The water level output unit 2 also compares the sequentially sent data and the latest data stored in the water level stack SK according to the nangling time T1 transmitted from the tie v-4, and when these data do not match, outputs a signal. This output signal causes the data of the IJ1 area of the water level stack 5 and timer stack 5 to be transferred to the 1182 area, the data of the second area to the fifth area, etc., and the water level output is transferred to the respective first areas. The cumulative sampling time of the data from part 2 and the data from part q-4 is stored.

7 is a calculation interval setter, and the comparison l! 6 to O output signals are integrated. Jin's calculation interval setting! l!
7 is a calculation interval setting terminal section 7m that can be switched and selected arbitrarily.
The output signal from the comparator Haruka is integrated a number of times selected by , and an output signal is generated each time. The number of times the calculation interval setting terminal section 7M is selected is arbitrarily and artificially selected depending on the size of waves on the water surface at that time, the flow rate, etc. For example, if the wind is strong and many waves with large amplitude occur.

In the case of digitalizing water level changes for one wave,
Since the number of changes in water level based on the threshold value increases,
The number of times set in the calculation interval setting terminal section 71 is increased. Conversely, in the case of waves with small amplitude, the number of settings is reduced.

8 is a computing unit that calculates the average of water level changes per unit time. For this purpose, the calculation interval setter 7
According to the output signal, data is read out from the first area of the water level stack 5 and the timer/stack 5 in the past, calculated, and outputted, and is reset at the same time. The number of data to be read out can be arbitrarily selected by the data number setting terminal section 8m.

The number of selections is artificially selected depending on the flow rate during the current wave state of the water surface. For example, in the case of waves with large amplitudes, the number of water level change lines will be digitized, so averaging a large amount of data will get closer to the true water level. A large number of rounded data pieces can be set. Conversely, in the case of a wave with a small amplitude, the number of data pieces is set to be small.

Reference numeral 9 denotes an output section, and 4 outputs the calculation results of the arithmetic unit 8 to %. Note that the storage amount is calculated based on this output value.

Next, the operation shown in FIG. 1 will be explained with reference to FIG. 2. Here, a case will be explained in which the sampling time is 5 seconds, the number of times the calculation interval setting terminal 7 is set is 4, and the number of data construction terminals 81 is 10.

■Now, the water level value is digitized according to the actual measurement curve shown in the second EK, and this is converted into, for example, the sampling time T, w.
Compare every second. Note that the 9-dot line B indicates the true O water level change, but it looks like a wave-rounded water level measurement value curve. When the measured value of the water level meter in the water level output section 2 is digitized, the measured value of the water level meter is digitized in units of threshold values indicated by unit scales on the vertical axis (water level) K in FIG. Therefore, if the fluctuation in the water level gauge measurement value is within this unit scale, the digital value will not change. For example, on the horizontal axis (time) in Fig. 2, the digital value output from the water level output unit 2 at time t1o is the same as the output of 1 until then because the change in the measured value of the water level meter exceeds the unit scale at time 2-. will be output as different digital values. The values outputted as different digital values after K are shown as black dots on the actually measured curve. Since the water level measurement value output from the water level output unit 2 and the water level measurement value held in the first area of the water level stack 3 do not match at time 2, the comparator 6 generates an output signal, and the water level stack 50111 area The water level measurement value held in the area is set in the second area, and the water level measurement value held in each area is set in the next area. Up to the first step! Once the water level measurement value held in the I-1 area (not shown) is set. This comparison! 16 output signal line timer stack 5K4fi! reached and similar controls are implemented.

Furthermore, the output signal of the comparison s6 is also transmitted to the expansion calculation interval setting 117, and the number of outputs of the comparison 86 is counted.

These steps are performed sequentially, and the water level stack 3 is set to time 1 in Fig. 2. The water level measurement value is held in the can area of timer stack 5Ka water level stack 3, and the good time (total time of tire - 4) is held in each corresponding area. .

■Time - 5 seconds have passed since the ninth sampling time -
The water level output unit 2 digitizes the fixed water level and the comparator 6 compares it with the water level side chamber value at the 9th time held in the first area of the water level stack 5. The digitized water level side chamber value of ζO and turtle is 11 of the water level measurement value - since the change from the *W water level value of - at time is a fraction that does not reach one scale of the water level. Therefore, time 1. Now, the water level measurement value output from the water level output section 2 and the first one of the water level stack 5 are
Since it is inconsistent with the water level measurements held in the area,
Comparator 6 produces no output signal.

■When the sampling time elapses from the time - and reaches the 2nd time t44, the water level measurement value outputted by the water level output unit 2 in the same manner as above is compared with the water level measurement value held in the first area of the water level stack 5. be done.

This time, the water level value has changed by 2N from the water level value of - above, so the water level side chamber value - is output from the water level output section 2,
This is compared with data bu in comparator 6. As a result, since these water level measurement values B and b44 do not match, an output signal is generated from the comparator 6, and the data stored in the water level stack 3 and timer stack 5 are sequentially transferred to the next stage area. , the constant water level value baa is written in the first area of the water level stack 3, and the cumulative sampling time at time t44 is written in the first area of the timer stack 5. Set the calculation interval at the same time! ! 7 counts 1.

■The same message is returned at time t#, tU.

The water level measurement value - and hulbu are sent from the water level output section 2 to the comparator 6, respectively, and the data h44゜h
4. bal and generates nine result output signals, each time the water level stack 5 contains base flat, bss
are filled in sequentially, and the timer stack 5 is filled in correspondingly.
At that time 14. , 1. The cumulative sampling time is entered in ,,-. The calculation interval setter 7 sequentially counts the output signals of the comparator 6, counts 4, 9, and generates a sound output signal, and sends this to the calculator 8.

■When the output signal is applied from the above calculation interval setting 117, 1 calculation II $ operates and goes up 10 times from time 9 to 10, and the measured water level value and the cumulative sampling time are output from the water level stutter 5 and time stack 5. are read out, an average value of bto water level change O per unit time is calculated from these, and the calculation result is output.

In the case of ζO Yang, as shown in section 1 in Figure 2, when the time interval of differential 1911 is Ti, the time to the water level Il*bran 10 times before this is 21T1, and the difference in the water level measurements at that time is 1 h. (h - water level measurement unit value) 2 sections n
The water level change time T-21Tl and the water level change H-1h at so are determined.

When the set number of data number setting terminal section 8m is set to 2 OK, as shown in section 11- of Fig. 2, 2
The time at 0 times 1I111 is T-41T,, H-15k
It can be found from K.

If in figure 1112, kJJ to calculation interval setter 7
When an output signal is generated from the arithmetic unit 8 and the arithmetic unit 8 performs a similar operation, the set number of data pieces setting terminal section 8aO is 10.
When , section n□ in FIG. As shown in 〒-207,
, H tan 12h, and when the set number of data number setting terminal section 8a is 20, as shown in section - in FIG.
T-41T, H-29h.

Therefore, K as shown in the intervals nfi, npeng.

When the water level is changing uniformly, the calculated value line of the water level change at this point, and - is t! are the same.

However, as in the calculation later, in the case of n'+o, the change in the water level is 0, so 9. It can be seen that in the case of , it is about % of that in the case of B so@O, and is in a declining situation.

(n Detailed explanation of the invention) As shown in Figure 2, the present invention detects the number of water level changes, stores them, and uses past data to speed up calculations. It is possible to calculate changes in the water level by reducing the influence of waves.

Moreover, by calculating the sudden changes in water level by looking up past data, it is possible to understand the water usage situation, which changes from moment to moment, within the smoke period.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of this embodiment. In the figure, 1 is a water level input terminal, 2 is a water level output part, 3 is a water level stack, 4 is a timer, 5 is a timer stack, 6 is a comparator, 7 is a calculation interval setter, and 7 is a calculation interval setting terminal part. , 8 is an arithmetic unit, 8m is a data number setting terminal section, and 9 is an output section. Patent applicant: Fujitsu Ltd. Representative Patent Attorney Akira Yamatani

Claims (1)

[Claims] (11) A water level output unit that digitizes the values in the water level column, a timer, a first storage means that stores nine data output from the part of the water level output, and a cumulative time output from the timer. a second storage means for storing the data corresponding to when storing the data in the first storage means; and a comparison means for comparing the data from the water level output section with the latest data stored in the first storage RK. and a counting means for counting the number of stitches of the output signal of the <0 comparison means, and a calculation means for reading a preselected number of data from the rod 1 storage means and the second storage means and calculating the number of stitches, A water level calculation method characterized in that the calculation means is configured to perform calculation operation based on the output of the stitch number means.