SU1675785A1 - Average current direction meter - Google Patents

Abstract

The invention relates to the field of oceanographic research. The aim of the invention is to increase the languor of measurements of the average direction of flow. The goal is achieved by using the first and second quarters of the discriminator 11, which generates pulses on the first, second and fourth clock pulses. These pulses are counted and summed by a correction counter 15. At the second output of the control pulse generator 17, at the end of the averaging interval, an impulse switch appears. Switching summing counter 4 and, counter 15, corrections to the subtractive mode. On the first output of counter 4, there appear pulses that enter the pulse separator 7. An additional divider of 16 pulses ensures that the correction is taken into account. 1 hp ff, 6 ill.

Description

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The invention relates to the field of oceanographic research.

The aim of the invention is to improve the measurement accuracy.

Figure 1 shows the direction of the vectors of average directions of currents; figure 2 - structural diagram of the meter; Fig. 3 is a timing diagram of the meter operation during the averaging interval; 4 is the same at the end of the averaging interval; Fig. 5 is a structural diagram of the formation of control pulses; 6 is a timing diagram of the operation of a control pulse generator.

The meter of the average direction of the flow contains a series-connected unit converting direction into an electrical signal, analog-to-digital converter (ADC) 2, code-impulse converter (KP) 3, summing counter (CC) 4, valve OR 5 and AND 6, divisor 7 pulses (CI) and pulse counter 8, quarter difference (RF); first 9, fourth 10, first and second 11, second valve I 12, trigger 13, generator 14, correction counter 15 (SP), additional divisor. 16 pulses (DID), shaper 17 control pulses (IGF), meter 18 measurements (SI) and register 19.

The digital outputs of the A / D converter 2 are connected to the digital inputs of RF 9-11 and KP 3, the output of which is connected to the first input of the CC 4, two outputs of which are connected respectively to the first inputs of the trigger 13 and the OR 5 gate, whose output is connected to the DI} digital input the inputs of the latter are connected to the digital outputs of the SI 18, the counting input of which is connected to the input of the record KP 3, to the inputs of the RF 9-11 and to the first output of the IGF 17, the second output of which is connected to the first input of the SP 15 and the second input of the SP 4, the third the input of which is connected to the counting input of the KP 3, the input of the generator 14 and the first input of the first valve I 6, the output of which is connected to the second input of the valve IL I 5 and the input of the DDI 16.

Output DDI 16 is connected to the third input of SP 15, the second input of which is connected to the output of the RF 11, and the output is connected to the second input of the trigger 13, the output of which is connected to the second input of the first valve 6, and the input to the output of the second valve 11, two the inputs of which are connected respectively to the outputs of the RF 9 and 10, while the third output of the IGF 17 is connected to the input of the record of the register 19, the digital inputs of which are connected to the digital outputs of the counter 8 pulses, and the fourth output of the IGF is connected to the inputs of the Set O DI 7. RF 9 and 10, pulse counter 8 and SP 15.

IGF 17 (FIG. 5) contains averagers 20 and sync pulses 21, time 22 and blocking 23 triggers, three delay lines 24-26, with the generator output 20 averaging intervals connected to the information input of time trigger 22, the output of which is the second output The IGF 17 is connected to the lock input of the sync generator 21 and the input of the delay line 24, the input of which is the third output of the IGF 17 and connected to the input of the delay line 25, the output of the latter is the fourth output of the IGF 17 and is connected to the inputs of Set. About the generator 20 averaging intervals and the time trigger 22, while the output of the generator 21 clock pulses is the first output of the IGF 17 and is connected to the input of Set. G blocking trigger 23, the output of which is connected to the blocking input of the temporary trigger 22 and the input of the delay line 26, the output of the latter is connected to the input of Set. About blocking trigger 23,

The average flow meter operates as follows.

At the output of the conversion unit 1 to an electrical signal, a voltage is generated that is proportional to the direction of flow. This voltage is converted by the ADC 2 to a digital binary code. In the averaging interval, the IGF 17 at its first output generates sync pulses, the period of which is arbitrary. Suppose that the first and fourth clock pulses correspond to measurements in the first quarter, to the second in the second quarter-third in the fourth quarter. On Bbixofleifal 3, a series of pulses appear, corresponding to the measured values. These Glsy are calculated and summed up by the CC 4 and the EXAMPLE diagram (Fig. 3) shows how its internal state changes, i.e. kzk growing internal amount.

SI 18 counts the number of sync pulses or the number of measurement terms. On the first clock pulse, RF 9 operates. On the third clock pulse, RF 10 operates. RF 9 and 10 are a comparison circuit with a D-trigger at the output. RF 11 generates pulses on the first, second, and fourth clock pulses. The pulses produced by RF 11 are counted and summed by SP 15. Only when RF 9 and 10 are triggered, which means going through 0 °, the output of the AND gate 12 turns on allowing trigger activation 13. During the averaging interval, only accumulation of measurement values occurs. It is necessary to determine

mean direction, i.e. determine the mean. arithmetic. At the second output of the IGF 17, at the end of the averaging interval (Fig. 4), a pulse appears switching the CC 4 and SP 15 and subtracting mode, and the IGF 17 delays this pulse if the circuit is still engaged in processing the last clock pulse. In this case, the pulses from the generator 14 begin to flow to the subtracting third input CC 4.

It can be seen in the diagram that the accumulated amount a CC 4 begins to decrease on an oblique one and at its first output there appear impulses, the number of which is early in this accumulated amount. This is also the beesy via the OR 5 gate coming onto the DI 7 exit. Suppose that N 300, i.e. on the outlets of SI; 1Ј, the binary code of the number 300 is set. This code arrives at the stationary inputs of the CI 7. Now, when the CI 7 arrives at the counting input, 300 pulses a single pulse appears at its output, and the 300: 300 t division occurs. Suppose that the accumulated sum of the CC4 is 1455. Then, at the output of DI 7, 4 pulses appear (if k 1, then rco 4 °), and the remainder 255, entered in DI 7, leaves 45 pulses there. If the transition does not occur, then the calculation of the average at this point stops.

However, in this example, O1 transition occurs, out of 300 measurements two occurred in r and 2 quarter x N1.2 - - Then the internal sum of SP 1b is equal to (lg.C). The correction is equal to 720 pulses, if 1. These 720 pulses must be sent to Enter 7. This is done with DDI 16. The division ratio of DDI 16 is set to 360 / k. For this example, it is chosen to be 360 when. The task of DDI 16 is to multiply NI.2 (3 60 / k), i.e. multiply the internal content of SP 15 by its division factor,

When multiplying, no residuals are formed which are not taken into account by the electronic circuit, and this is the advantage of this operation over division. As can be seen, the result of multiplication is equal to the correction. Consider the operation of the scheme by definition and accounting amendments. After 1455 pulses come out of CC4, its internal sum becomes equal to zero, and at the second output of CC 4 a pulse appears that triggers trigger 13. Authorization to turn it on is already given by gate AND 12 (FIG. 3). The trigger 13 opens the valve And b, and through it the pulses from the generator 14 begin to flow to the inputs of the DDI 16 and the valve OR 5. The valve OR 5 passes these pulses to the input of the DI 7.

Inside DI 7, the number 45 has already been written,

H remaining from averaging p, therefore,

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having counted another 45 mplus, DI 7 sees one pulse at its output, i.e. the remainder is 255 estimated with amended. The inputs of DDI 16 and DI 7 can only be received by the number of pulses equal to the unidentified correction, i.e. 720. Since the division ratio of DDI 16 is equal to 360, 2 pulses are generated at its output, which are fed to the subtracting input of SP 15 and subtracted from its internal sum (2 - 2 0).

5 As soon as this sum becomes zero, SP 15 generates a pulse at its output, including a trigger 13, which turns off valve I 6, and the flow of pulses to the inputs of DDI 16 and DI 7 stops, i.e. on

The QI of the DI 7 receives only 720 pulses. At the output of the DI 7, (in this case, taking into account the remainder 255), 3 e. The correction t is 3 °. The remainder of 75 is considered further. The error in determining the medium5 is equal to 0.25 °.

All pulses from the output of the DI 7 are recorded in the SI 8.

Consider the operation of the IGM 17 according to the block diagram (Fig. 6} and the diagram (Fig. 6). The block trigger 23 delays the activation of the time trigger 22 for the time tsvi, if the generator 20 of the averaging intervals reports imgup, indicating the end of the averaging interval, -o pbote schemes

With the formation of a CVMMIM e counter 1, the arrival of the last sync pulse has not yet ended. The locking trigger 23 is turned on by the sync pulse and is turned off after a predetermined time using the line

Q 26 delay. As soon as the blocking trigger 23 is turned off, the time trigger 22 immediately turns on, which blocks the clock pulse generator 21, so that during the calculation interval of the average syn5 the pulse does not interfere. At the end of the interval for calculating the average delay line 24, a recording pulse is emitted, according to which the calculated average direction from SI 8 is rewritten into register 19. More

After a while, determined by the delay line 25, the IGF 17 generates a total pulse. O, according to which the whole scheme comes to its original state and the cycle of determining the average begins again.

Introduction of the first and second quarters discriminator to the average direction meter, separate summation of the measured values of the directions, the number of measurements and the number of measurements in the first and second quarters x 5

Claims (2)

To increase the exact measurement of the average direction of the flow, expand the range of the measured directions to ± 135 ° relative to the average direction, and make the interval of averaging independent of the number of measurements. Invention Formula 1 Measuring instrument average naprzil flow, containing the flow measurement system, housed on a sealed enclosure, inside which is located the Y direction conversion signal and the still-life signal, successively connecting a pulse divider and a pulse counter, valve I, discern the first and fourth quarters, an additional pulse splitter , in order to improve measurement accuracy, an analog-to-digital converter, a transducer, a summation counter, an OR gate and a second AND gate, are introduced into the sealed enclosure; - first and second quarters, trigger, generator, correction and measurement counters, driver of control pulses and register, where the output of the converter into the electrical signal is connected to the dynech to the driver, it is vij o-ckfravp1 converter, and the field is connected to the digital gyodes Quarter and ki-li-lui-yu converter are south converters, the output of which is equal to the first input of the counting counter, and the two outputs of which are assigned to the first one in the circuit, the valve OR, the output of which is mnek divider to the input pulse, digital vhs- rows which are connected moves you digital measurement counter, the counting input of which is connected to fon record entry, o pulse transducer to the inputs of different lnchiteley fourth and first output of the control pulses, the second output of which is, 0 | Emergency 1 to lane PTO INPUT SCECULAR PSGG) PLN And l BiOpO, G / I summarize the input of the counter, decide which code is connected to the bcw | to the main input of the pulse pulse converter, the generator output and the first input / first PSHTI L I, whose output is connected to the second output of the X-ray OR, and the input of the additional dividers is a pulse, the output of which is connected to the third input of the pop-up, the second input of which is connected to the output of the first and the fourth and fourth quarters, and the output is connected to the second ore of fpnuep s, you - d which is connected to the second of the first valve AND, a 0 input is connected to the output of the second valve AND, whose two inputs are connected respectively to the outputs, distinguishes between the first and fourth quarters, and the third output of the form and control pulses is : - 0Ј, connected to the register recording input, the digital inputs of which are connected to the digital inputs of the pulse counter, and the fourth output of the control wipper;  J J mmpool dividers, distinguishing first v, quarter line, corrections and impulse. 2. Measured according to claim 1, about tl and h a y i and y 5 with h, whose controllers impulses contains renepaiopt intervay, miich oopulsoe, vrelyon) th i lok. Tozochny triggers, three PII lzchderzhr and VUHO.O generator  .iH t-valval orezzen w is connected to the informative terminus of the war trigger, hjxor,. CTopoio is a second hop, o cbn) M1 / rooatech control 1l of 1l connected to the lock input B yoergorr from the terminal and in / ode the first delay, the output of which is the output of the phoapamplifier pulse and is connected to the input of the second delay line, the output of which is left for the upras, pulses and connected to Set About generator iktg; g, yl01 with redpen l and time trig-, with iioi. EYASDS renc-o 0ps with Sr / rp / lp pa / years with r., .Cyp output of ovmtel / forward pulses and psdsoadinen / descending of timed triggering and through the third delay line: i., Leave u. ABOUT D 4th & Zchetb 1 account  BUT averaging interval Exit ... nn 1 Fi.Z End of the averaging interval 2nd Out FuIIP Interval in average Int. state of the SSC and 1st Exit CO Int. SIV state internal state DI1 Out Trf3 out „M out internal state cms Sifjr SP15 3rd would be. FUIP4-yi vsh FUIP Interval Beginning Averaging 5 FIG. 6