SU452001A1 - Measuring and computing device for determining parameters of fast-variable and pulsating fluid flows - Google Patents

Description

(54) MEASURING DEVICE FOR DETERMINING PARAMETERS OF FAST-VARIABLE AND PULSATING FLUID FLOWS

the number of cycles. The number of measurement cycles for different parameters may vary.

The proposed measuring and computing device additionally contains a reference pulse generator, a frequency divider, an array of codes to an arithmetic unit, a text display register, a meter of measured periods, a register of a switch, a circuit for receiving codes, an AND circuit, a local control unit, a current time block. The output of the switch is connected to the input of the meter of measured periods through the shaper of time intervals, and the second input of the circuit I is connected to the output of the local control device. The output of the meter of measured periods is connected to the input of the arithmetic unit through the second circuit And, the second input of which is connected to the output of the reference pulse generator. The output of the arithmetic unit is connected to the input of the local control unit, the output of which is connected to the d: soda of the meter of measured periods. The output of the non-volatile memory unit is connected to the central control unit, the output of which is connected to the input of the local control unit. The output of the local control device is connected respectively to the inputs of the voltage converter into the code, the digital and text display registers and the code distribution circuit to the arithmetic unit, the other inputs of which are connected respectively to the outputs of the voltage converter into the code, frequency divider and current time block. The input of the frequency divider is connected to the output of the reference pulse generator, the output of the code into the arithmetic unit with the input of the arithmetic unit, the output of which is connected to the inputs of the digital and text display registers through the code reception circuit. The outputs of the digital and text display registers are connected to the inputs of the control panel.

Such an implementation of the measuring device circuit allows measurement of electrical signals represented as direct current voltage, alternating voltage frequency, pulse frequency, while simultaneously recording the current time corresponding to the measurement moment; cyclic measurement with automatic change in the number of measurement cycles without repeating typical steps of command execution; an increase in the accuracy and speed of measurement of the parameters presented in the form of the frequency of an alternating voltage due to an automatic change in the number of measured frequency periods; simplify the circuit, the frequency converter and the time intervals into the code using the adder of the arithmetic device B as a pulse counter from the generator to form an equivalent binary Kojaa.

The drawing shows a block diagram of the proposed measuring-computing device.

The device contains 1 reference pulse generator, a circuit 2 for issuing codes to an arithmetic unit, a switch 3, a voltage-to-voltage converter 4, a text display register 5, a control panel 6, a time interval imager 7, a frequency divider 8, an AND 9 circuit, a current block 10 time, switch register 11 11, code reception circuit 12, digital display register, local control device 14, measured period counter 15, AND circuit 16, main memory unit 17, arithmetic unit 18, input and output unit 19, unit 20 long-term am ti, central control unit 21 and sensors 22. The apparatus also includes a printing apparatus, the program counter, perforating device, an instruction register and fotoschitshayuschee; device (not shown).

: Measuring and computing device operates as follows.

In blocks 20 and 17, a general program for determining and analyzing flow parameters is recorded in advance. Recording program in

block 17 produces a photo editing device through block 19 and the arithmetic unit 18.

five . The change of the program in block 20 wasp / main is replacing it with pre-stitched shsset. In the firmware part of block 2O, a sequence of microoperations; special commands for measuring a parameter,

50 Cyclic measurement, registration of current time and time delay, text-1OI and digital indication, as well as the omission of microoperations of the usual commands of the mathematical software of the measuring55 of the computing device If necessary, before starting work, the program can be adjusted, the source data, self-checking of the device by text programs . In the operation of the device, the device solves the following main tasks: input of the program; automatic control of the program in real time; in accordance with the program, automatic measurement control, registration of napimeters; on-line indication in digital and textual form of the flow parameters monitoring, mathematical and logical processing of measurement results taking into account the non-linearity of the calibration characteristics of sensors, transducers, reduction of measurement results to a physical scale, calculation of corrections depending on changes in external conditions, determination of extreme values of flow parameters , the calculation of the interrelationships of directly non-measurable parameters. For most of these tasks, it is common to measure the magnitude of the signal coming from sensor 22 (primary converter) on the selected channel of switch 3. To do this, the next command is deciphered by the microprogram part of unit 20 and a sequence of microoperations of one or another command is formed at the output of device 21. Moreover, the sequence of micro-operations of special commands is transmitted to the device 14, which ensures the execution of these commands. For the command, the measurement of the parameter number is transmitted through the circuit 12 to the register page 11 to switch on the selected channel of the switch 3, which is provided for a delay of thousands of seconds before the end of the transient processes. Depending on the channel number, the signal from sensor 22 goes to converter 4, then through circuit 2 to arithmetic unit 18 or to driver 7 for parameters in the form of voltage frequency. Previously, from the fixed cell of block 17, the corresponding inverse code of the number of measured periods is entered into the counter 15 via the code reception circuit. At the moment of starting the measurement, the local control device opens the AND 9 circuit, and the sequence of pulses corresponding to the transition of the voltage across the zero voltage enters the input of the counter 15. At the same time, the AND 16JI circuit opens. The pulse sequence from the generator 1 is fed to the input of the adder of the arithmetic unit that performs Functions frequency converters voltage to code. At the moment of the overflow of the counter 15, the And 9 and 16 circuits close, the equivalent binary code is written from the adder 18 to the block 17. From the output of the device 10, the current time code corresponding to the measurement moment, through the circuit 2 enters the arithmetic unit 18. Next, the device 14 turns off, and device 21 terminates the execution of standard steps of this command - recording the result and ensures the execution of the following command,. Automatically changing the contents of counter 15 allows increasing the measurement accuracy with increasing number of measured periods or increasing speed with decreasing number of measured periods, i.e., allowing increasing accuracy and measuring speed depending on the behavior of the parameters. For a command, cyclic measurement of its typical stages — reading a command, analysis of identification, formation of addresses — enter device 21, and device 14 connects, depending on the parameter number, to perform a specified number of measurements, record the result and record the current time. to the converter 4, generates a pulse of the beginning of the conversion, and by the pulse the end of the transformation transmits the equivalent binary code of the converter 4 through the circuit 2 to the arithmetic unit 18, recording goes in block 17 at the command address, increases the address by one if the number of cycles of errors is not completed, repeats the next measurement. Record the result in the block of operative memory without repeating typical command steps. When recording in block 17 of the last measurement from among those required, device 14 transmits the value of the current time through circuit 2 to arithmetic unit 18 and block 17. If the output of switch 3 is connected to driver 7, device 14 before each measurement in the measurement cycle restores the contents of the counter 15 s The arithmetic -Toolductor 18 equivalent binary code of the measured frequency is recorded in block 17 and the fluid time is recorded at the moment of the last measurement of the cycle. After the mathematical and logical processing of the received information, the results are printed, punched, digitally or textually typed: in accordance with the general algorithm of the program. Register 5 of the text display provides the display of text explanations on the control unit 6, and the register of the 13 1 1-display indicates output to the digital control panel of the control unit of the measurement results and the number of the flow parameter to be monitored. The subject of the invention. nor Measuring and computing device to determine the parameters of rapid change. n {x, and pulsating fluid flows, containing sensors connected to a switch, the output of which is connected to the input of the voltage converter into a code, time interval generator, control panel, arithmetic unit, the inputs of which are connected to the outputs of the operating memory block and the debt block -modern memory, the inputs of which are connected to the outputs of the central control unit, an input and output unit, characterized in that, in order to improve the accuracy and speed of the device, it further comprises a generator reference pulses, frequency divider, code issuing scheme B a) imetric device, text display register, measured period counter, switch register, code reception circuit, AND circuit, local control unit, current time block, ommutator output through time interval generator and circuit And connected. to the input of the counter of measured periods, the second input of the circuit I is connected to the output of the local control device, the output of the counter of measured periods is connected to the input of the arithmetic device through the second circuit AND, the second input of which is connected to the output of the reference pulse generator, the output of the arithmetic device connected to the input of the local control unit, the output of which is connected to the input of the meter of measured periods, the output of the non-volatile memory unit is connected to the central control unit whose output is connected with the local control device input, the local control device output is connected respectively to the inputs of the voltage converter in the code, digital and text display registers and codes to the arithmetic device, the other inputs of which are connected respectively to the outputs of the voltage converter in the code, frequency divider and block the current time, the input of the frequency divider is connected to the output of the reference pulse generator; The output of the code issuing circuit into the arithmetic unit is connected to the input of the arithmetic unit, the output of which is connected to the inputs of the digital and text display registers through the code reception circuit, the outputs of the digital and text display registers are connected to the control unit inputs.

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