JPS5818609B2 - water level gauge - Google Patents

Description

[Detailed Description of the Invention] The present invention uses a display position to remotely detect a state in which the water level changes quickly at a certain time, such as the water level in a regulating pond, and then stabilizes and repeats this periodically. The aim is to provide a water level gauge suitable for transmission, etc.

Hereinafter, details of one embodiment of the present invention will be described with reference to the drawings.

Mechanically detects phenomena in which the entire body rises and falls while repeating small vertical movements, such as the water level of a lake where changes in water level occur simultaneously due to waves and the inflow and outflow of water, as pulses of rise and fall. Sometimes.

In this case, the water level at that point is given as (sum of raising pulses - sum of lowering pulses), so it can be obtained by manually inputting raising and lowering pulses to the forward and reverse counters, but the counter display in this case Since the waveform changes each time a rising and falling pulse is input, if there are large waves, the waveform will repeatedly rise and fall, making it extremely difficult to read.

Waves are generally equal in both directions and are unrelated to changes in water volume, so it can be said that a counter display based on this is unnecessary.

In such a case, if you make a tube with a small hole and put it into lake water, the width of the water level fluctuation inside the tube will be less than the width of the water level fluctuation of the lake water.

The degree of width reduction is determined by the size of the small hole made in the tube.

This small hole is called an aperture hole, and reducing the amplitude of vibration in this way is called damping.

If we consider that waves are vertically symmetrical, the water level change is zero, so
If the aperture hole is determined so as not to react to this, and the detection section is installed here, a display that does not cause unnecessary movements can be obtained.

However, for this purpose, it is necessary to change the aperture hole depending on the wave height of the waves, which is impossible due to the installation location and other factors.

All the detection sections have operating sensitivities that can follow the mechanical performance of the detection sections, and are configured in a circuit as shown in the block diagram of FIG.

That is, since the detection unit inputs it as a rising and falling pulse, it is inputted to the side corresponding to the rising and falling, and is stored in the counter on each side while counting.

Both counters on both sides are initially reset, and the counter output is O.

If an input pulse is now entered on the rising side, the output of the rising side counter becomes 1 and the timer is driven.

If this continues, a rising supply output will be output and displayed after the timer has expired, and at the same time, the counter's recovery circuit will be activated, the counter will recover, and the operation will end.

Suppose that a wave as shown in Fig. 3 is input to this circuit.

The waves are more negative 2 cm than positive 2 cm every 5 seconds.

Now, if 1 pulse is 1 crrL, it will be on the rising side at first, so it will be the counter force on the rising side, and after 2 counts up, 2
Since it counts down, the output of the rising side counter becomes 0 after 2QSeC.

Here, if the above-mentioned timer is set to 20SeC, 20
Seconds later, the counter on the rising side is reset at the same time as the timer outputs, the input to the timer is cut off, and the output display does not change.

Similarly, on the minus side, after 25 seconds, the counter on the lower side becomes human power, counts up by 2, then counts down by 2, and the display does not change as before.

In other words, arbitrary damping can be applied by changing the setting of this timer.

Of course, as mentioned above, there is no need to lower the sensitivity of the detection section for this purpose, and it can be said that this is an ideal damper circuit.

Also, since this circuit is a counter circuit, it has a memory circuit for the number of pulses, and if we assume that there is only a rising pulse and no falling pulse, it will output the input that comes in at arbitrary intervals within the timer's settling time. It is also a circuit that continues.

Therefore, in FIG. 2, 1 is the entire water level meter of the present application, and its configuration is a cylindrical wave barrier pipe 1 having a damper hole 1B in the bottom plate 1A.
A float sheave 1F is provided on the top plate portion 1D of C, and the float sheave has a float I at one end and a weight t-I at the other end.
The cable 1H with G' attached thereto is suspended, and the float sheave center shaft 1■ is connected to the detector 2 via the gear 1J.
The damper circuit 2A shown in FIG. 1 is connected to the detector, and the damper circuit is branched into a raising side up-down counter 2B and a lowering side up-down counter 2C. The Ryokawa power is connected to the counter via the display section 2H and the return circuit 21.

FIG. 4 shows this circuit, which will be explained in order below.

2 is a raising/lowering input pulse storage circuit.

~ This is a circuit that puts the input pulse for raising and lowering into a one-shot multi and stores it for a certain period of time. During this time, the raising and lowering supply output relay operates, and after the display ends, the operation ends with your own input until the timer is reset. The time is the sum of the time until

This restricts the simultaneous operation of the input from the water level gauge and the counter return circuit from the raising/lowering supply output.

2 is a clock pulse generation circuit.

~The clock pulse is given as a level by the human power of the raising/lowering pulse from the water level gauge and the XIJ relay contact of the raising side lowering supply/output circuit, so this is a circuit that puts this into a one-shot multi and uses it as a clock pulse.

2 is a clock pulse distribution circuit.

~This is a circuit that determines whether to input the clock pulse from the clock pulse generation circuit into the up-side up-down counter (up-side counter) or into the down-side up-down counter (down-side counter).

(a) When there is no input to the raising/lowering side counter (output O
) - If there is an input to the rising side counter when the rising pulse is input, or to the falling side counter when the falling pulse is input (b), if there is an input to either of the lowering side counters (in the case of output 1) - when the rising/lowering manual pulse is input In both cases, the counter on the side with input is the counter circuit on the raising/lowering side.

~This circuit is a binary up/down counter that counts up and down human pulses, and the number of output bits is determined by the total number of pulses counted.

(B) If there is already an input on the rising side counter - Count up when the rising pulse is input - Count down when the falling pulse is input (B) If there is already an input on the falling side counter - Count up when the falling pulse is input - Count down when the rising pulse is input Let's now set the number of output bits to 4 bits, and the output will be A.

If B, C, and D are used, this truth table is as shown in Table 1.

Now, if we put these outputs A, B, C, and D into an OR circuit, there will always be a 1 except for the start (reset state), so the OR output will always be 1 if there is an input, and the timer will be driven by 7 as soon as the input is received. Begin the initial desired movement.

The output of this OR is used for driving the timer, clock, and conditions for the pulse distribution circuit.

(Do not use *marks. 0, 0... is only for the start.

)■ is a rising/lowering side counter up/down input signal designation circuit 1.

~The counter has an emitter for input signals that determines whether to count up or count down, and normally the side that counts is 11 and the side that does not count is O.
This is the circuit that specifies this.

(B) When there is no input to the up and down side counters - When the up pulse is input, 1 is added to the up side counter. When the down pulse input is input, 1 is added to the up side counter (b) When the down side counter is already input. If it is on the up side, set 1 to up when the up pulse is input, and set 1 to down when the down pulse is input.If it is on the down side, set 1 to up when the down pulse is input, and set 1 to down when the up pulse is input. This is a down side counter up/down input signal designation circuit 2.

~The purpose is the same as the above circuit (■).

The above circuit (2) is based on input pulses for raising and lowering, but this circuit (2) is for returning the raising and lowering side counters after the display has been completed by the raising and lowering output relay circuits.

(a) Raised P-output ・Place 1 on the lowering side of the counter on the raising side. (b) For lowering side relay output - ・Place 1 on the lowering side of the counter. ■ is a timer circuit.

~Put the outputs of the up and down side counter circuits into OR,
This is a timer circuit that operates based on the output, and uses a time-limited and variable on-delay as the timer.

This is a so-called variable damping circuit.

The AND circuit before the on-delay is used for resetting the on-delay and for setting when the OR output continues to be output.

There are two input signal circuits for this AND, one is connected to the output of the OR, and the other is connected to the b contact of the X'J relay. Reset by cutting off the input signal.

At the same time as the on-delay reset, the relay output on the raising and lowering side is also cut off, and the relay also returns to normal and moves on to the next operation.

[Phase] is the raising and lowering side relay output circuit.

~The output obtained by input ANDing the time-up of the onderu and the output of the raising and lowering side counter circuits operates the raising and lowering relays, and this output is used for returning the raising and lowering side counters of circuit 8 and the XIJ relay. The display is driven by ANDing one drive and the other with the XIJ relay contact.

0 is a mutual priority circuit.

~The human power pulses for raising and lowering coming from the detection unit and the reset signals for the raising and lowering side counters coming from the raising and lowering side relay output circuits are not synchronized, so they may operate at the same time (mostly) or on the other side. Since there is a good possibility that the data may be input inside the system, the purpose is to prevent malfunctions in this case, and this will be explained with reference to FIG.

G6. B7 is operated by raising and lowering manual pulses from the detection section.

B8. B9 is operated by the up and down counter return signals coming from the up (goods) and down (down) side relay contacts.

Now G6. If the input signal on the B7 side was a little faster,
1 comes out from the orer of B7, passes through B4, and goes to B8. While B9 is locked, the base of Tr1 is made negative to turn off Trl, so even if the raising and lowering relay output circuits operate at this time, V
, Only the DIJ relay operates, and the X relay operates as a Tr.
1 is off, so it cannot operate and enters a standby state.

Thereafter, the input pulse is countered and at the same time the one-shot multi operation of A1 and A2 is completed, the 1 of B7 becomes 0 and the operation shifts from standby.

In the opposite case, 1 comes out from the orer of B8 and passes through B3 to G6. Lock B7, A1. Make input standby with A2's one-shot multi.

After the raising and lowering relay output circuits complete their operation, the E8 lock is released and the operation starts again.

0 is a return circuit. Raise: The operation of the lower relay output circuit operates U, DI, and Lou, and this contact operates the Change the input from 1 to 0.

With this, Glo's and gate is mouth. The on-delay timer T1 is reset.

When on-delay timer T1 returns, G11 + G1
The AND gate 2 is checked six times, and the U and D relays return to normal.

As a result, the X relay also returns to Glo and G1□. G1□
The gate is unlocked and returns to 1, but if there is still a count value in both up and down counters, Glo
The on-delay timer T1 is started through the AND gate, and the water level display continues.

On the other hand, the output of the inverter amplifier B5 is the OR gate E.
A3 one shot multi through 9.

When activated, the circuit operates as described in the previous section (■) and subtracts one pulse from both up/down counters to correct the remaining count in the counters to the correct value.

Next, to explain the operation, when the circuit is in the start (reset state) state, there are inverters B1 to B4.

- Only the output is 1.

In this state, if the rising pulse from the detection unit is input and the water leaks, G6
turns on and supplies 1 to U of C1 and D of C2.

On the other hand, the output of G6, which supplies 1 to the gate of G4 and waits, is B7. Since input is given to A3 through B9, a positive clock pulse is generated.

G1 is B1. Since B2 is 1, the clock pulse is G,...
G4. Given to 01 through El.

Since U of C1 is 1, the counter increases by 1.

If the count increases by 1, the output of C1 becomes 1 and Elo,
Drive T1 by 1 through Glo.

On the other hand, we give 1 to the G2 gate and set B1 to O, so it becomes G.

is locked and subsequent clock pulses are G2. It is given to C1 through El.

If a rising pulse is input again before the time-up of T, the same operation as before occurs, and C1 counts up by 2.

Furthermore, if there is an input before the T1 operation, the count is increased by 3.

Here, if T1 times up, G1□ turns on and operates the U relay, which causes the XIJ relay to operate and display.
At the same time as o is turned off and T1 is reset, G1o is turned on after a certain time period, and since the C1 output is 1, T1 is driven again.

On the other hand, B8 is turned on by the XIJ relay contact and the U relay contact, giving 1 to D of C1 through E, and B, E9.
Since a clock pulse is applied to C1 through A3, C1 is returned from 3 counts to 2 counts.

Here, when a falling pulse is input from the detection section, 01 D is 1, and the clock pulse is B7. B7. B9. A3. G2.
Since it is supplied to 01 through El, C1 decreases from 2 counts to 1 count.

Furthermore, when T1 times up, C1 changes from 1 count to 0 and enters the start state, in the same manner as described above.

Here, when a falling pulse is input from the detection section, the clock pulse is A3°G, , G5 . C2 through B2
Also, since U of C2 is multiplied by 1 through A, 2, and B7, C2 counts up by 1.

After that, the same operation as described above is repeated. However, the countdown is at the time of the rising pulse and is opposite to the above, but the rest is the same.

Also, if there is a simultaneous input during this operation, the operation will be as explained in connection with circuit 0 above.

In addition, A1-A in the figure are one-shot multi, B1-B5
is an inverter amplifier, C1 to C2 are binary up, down counters 1E1 to E1o are OR gates, G
, ~G1□ is an AND gate, T1 is an on-delay timer, U, I), and X are electromagnetic relays, respectively.

In this way, according to the present application, a situation in which the water level fluctuates rapidly at a certain time, stabilizes after that, and then repeats this periodically, such as in a relatively small regulating pond or a rapidly advancing water level, can occur. When transmitting remotely using the display position,
Since this transmission requires a certain amount of time, it may not be possible to transmit input that exceeds this transmission time.

In such cases, if you use this circuit and set the timer to this transmission time, it will memorize the earlier time and transmit it when it is stable, so no errors will occur.

In general, speeding up the transmission time is costly and requires a lot of equipment, so if a slight time delay can be tolerated, it is a very useful means.

Integrating wattmeters that send pulses can also be used effectively because they have peak and off-peak periods and have a 24-hour cycle.

The storage capacity can be increased by increasing the number of output bits, and the number of bits can be determined by calculating the number of pulses in one cycle.

This is a useful invention that has the following effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a block diagram, FIG. 2 is a vertical cross-sectional view of a water level gauge, FIG. 3 is a graph regarding waves, and FIG. 4 is a circuit diagram of the present application. FIG. 5 is a mutual priority circuit diagram, and FIG. 6 is a circuit diagram of another embodiment of FIG. 4. 1...Water level gauge, 1B...One damper hole, 1C
... Wave protection pipe, 1F ... Float sheave, 1G ... Float, 1G / ... Weight, 1H ... Cable, 1■・・・・・・Central axis,
2...Detector.

Claims (1)

[Claims] 1. A float sheave is provided on the top plate of a cylindrical wave-proof pipe having a damper hole in the bottom plate, and a cable with a float attached to one end and a weight attached to the other end is suspended to the float sheave, and the float sheave The center shaft of the is connected to a detector via a gear, and a damper circuit is connected to the detector, and the damper circuit is used to calculate and store the correct water level at each time. It has a counter and a down side up/down counter, and the up/down output from the detector is input to each up/down counter for counting, and the output of both up/down counters is an on-delay whose time can be set arbitrarily. Via the timer
It is connected to the raising side relay output and the lowering side relay output, and is output at the same time as the time-up of this on-delay timer.
In addition, these two relay outputs are connected to the display section that displays the water level of the water level meter, and after confirming that the display has finished, subtract one pulse from both up and down counters to correct the count value in this up and down counter, and to correct the count value in this up and down counter. A water level gauge characterized by having a damper circuit comprising a return circuit for restoring an on-delay timer, thereby restoring a raising/lowering side relay output, restarting the on-delay timer, and continuing water level display operation.