SU858005A1 - Device for computing volumetric rate-of-flow - Google Patents

Description

one

The invention relates to computing and measuring technology.

A device containing an analog-to-digital converter, a cleaver, a knife, a reference generator, a drive, dividers, a block for inputting numbers to dividers, a digital-to-analog converter, a permanent storage device 1.10 is known.

However, to implement this device requires significant equipment costs.

The closest to the proposed technical entity is a device containing two counters im- "5 pulses, a stable frequency generator, two AND elements, two converters of a decimal code into a binary-decimal, a measurement time input block, the first coefficient input block," About the start pulse shaper, volumetric flow meter, display unit, the inputs of which are connected respectively to the outputs of the first pulse counter, the output of the start pulse shaper is connected to the control inputs of the first and second pulse counters lsov outputs time input unit through the first measuring transducer a decimal to binary des tich- f

The first is connected to the inputs of the second pulse counter, the output of which is connected to the first input of the first element, the first input of the second element, And is connected to the output of a volume flow meter, the output of the second element, And is connected to the counting input of the first pulse counter, and the second input of the first element is connected to the output generator of stable frequency, the output of the first element And is connected to the counting input of the second pulse counter, the outputs of the first block for inputting the coefficients through the second converter of the decimal code into binary - local connected respectively to the inputs of the first pulse counter 2.

However, this device cannot be used when using flowmeters whose conversion function is approximated by a second-degree polynomial.

The aim of the invention is to expand the scope.

The goal is achieved by the fact that in a device containing two pulse counters, a generator of stable frequency, two elements AND, two converters of decimal code in

binary-decimal, measurement time input unit, first coefficient input unit, start pulse shaper, volumetric flow meter, display unit, whose inputs are connected respectively to the outputs of the first pulse counter, output of the start pulse shaper connected to the control inputs of the first and second counters pulses, the outputs of the measuring time input block through the first decimal-to-binary converter are connected respectively to the inputs of the second pulse counter, the output of which is connected to nepBbsvi input of the first element And, the first input of the second element And connected to the output of the volumetric flow meter, the output of the second element And connected to the counting input of the first pulse counter, the second input of the first element And connected to the output of the stable frequency generator, the output of the first element And connected to the counting input The second pulse counter, the outputs of the first coefficient input block through the second decimal code converter in binary-decimal are connected respectively, to the inputs of the first pulse counter, two elements are introduced This And, the element is NOT, the third pulse counter, the third converter of the decimal code into binary and the second coefficient input unit, the outputs of which through the third converter of the decimal code into binary-decimal are connected respectively to the inputs of the third pulse counter, the counting inputs of which are connected respectively To the outputs of the third and fourth elements I, the control input of the third pulse counter is connected to the output of the start-up pulse former. The output of the third pulse counter is connected to the second The second input element And to the first input of the fourth element And, the second input of which is connected to the output of the stable frequency generator, the third input is connected to the output of the element NOT, the input of which is connected to the output of the second pulse counter, the inputs of the third element And are connected respectively to the outputs of the volumetric flow meter and second pulse counter.

The drawing shows the scheme of the device.

The circuit contains a volumetric flow meter 1, element 2, element 3, element 3, element 4, pulse counter 5, converts 6 decimal code into binary-decimal, measurement time input block 7, pulse counter 8, converter decimal 9 binary-decimal, coefficient input unit 10, element 11, indication block 12, pulse counter 13, converter of decimal code 14

binary decimal, coefficient input unit 15, AND 16, stable frequency generator 17, trigger pulse generator 18.

The device works as follows.

From the output of the volume flow meter 1, whose conversion function is approximated by a second-degree polynomial

, t-t)

receives a sequence of pulses at the input of the element And 2 and at the S input of the element And 4.

Expression (1) can be represented by Tag:

Q.a.b. ()

(B-s).

W Choose

t - Ng -. c .-. 19r., - r

3 -f t

. about TO

where N is the code of the number of pulses, which 1 must be written in

counter 5 pulses, when reading which pulses of a stable frequency from the output of the generator 17 receive a time interval T

fo

, - is based on the number of valid significant digits of the coefficient c. 5 Then

T-C-Yu. WITH)

After a number of transformations, you can get the expression

Q-Ca .-. O (HK.) W

In block 7, the input of the measurement time is set to the NO code, which must be written to the counter 5 pulses. In block 10, the code / b "10 pp-c. , and in block 15 the coefficient code is set

Ma a 10

which must be recorded in the counter 13 pulses.

From the output of the counter 5 pulses, a prohibitive signal is fed to the input

element 2 and the input element I 16. From the output of the counter 8 pulses, the prohibition signal is sent to the input element I 4 and to the input element I 11.

From the output of the imaging unit 18, an impulse is received to the control inputs of counters 5, 8 and 13, which will write the codes

Claims (2)

С-юМЬ1о - -С1о | O. O. At the outputs of counters 5 and 8, the enabling signals are set, which arrive at the input of the elements And 2, And 16, And 4, And 11, respectively, to the input of which NOT 3 a prohibitive signal is fed to the input. From the output of the element AND 4, the pulses from the volumetric flow meter 1 are fed to the counting input of the counter 13 pulses, from the output of the element I G, 6 pulses. A generator of stable frequency 17 is fed to the counting input (countdown) of the counter 5 pulses operating in the subtraction mode. After 1 C-10 time from the output of the counter 5 and "pulses, the inhibiting signal is received, and the input of the element I.2 arrives at the input of the element AND 16 and at the input of the element NO 3. The operation of the counter 5 pulses stops. The counting input (countdown) of the counter 8 pulses from the output of the element And 2 pulses from the volume flow meter 1 does not pass. In the counter there are 8 pulses to this. the momentum will be recorded summary code Áno - s-1o 1 mcha-1a,: in the counter 13 pulses, the code will be output and the output of the element I 11 appears with the permission from the output of the element HE 3 and the input (account) of the counter 8 pulses is started five stable frequency pulses from the generator output 17. After a time (- fo NX2-tO T --M from the output of the counter of 8 pulses, a prohibitive signal is sent to the input of the And 11 element and to the input of the And 4 element. Work of the 8 and 13 pulses In the counter, 13 pulses write with the code "to Ni -Y, i.e. it will contain the sum of codes corresponding to "Thus, to obtain a measurement result in units of consumption, it is necessary in the pulse counter reading 13 to move the command to K bits to the left. Changing the coefficients a and hanging respectively the pre-recorded numbers into counters 5, 8 and 13 allows to correct the conversion function of the flow meter during calibration The proposed invention eliminates the additional costs and reduces the time required to process intermediate measurement results. The invention The device for calculating the volume flow, containing two pulse counters, a generator of stable frequency, two elements And, two converters of the decimal code into binary, a unit for inputting the measurement time, the first unit for inputting coefficients, a driver for starting the pulse, a volumetric flow meter, - a unit display, the inputs of which are connected respectively to the outputs of the first pulse counter, the starting of the trigger pulse generator is connected to the control inputs of the first and second counters of the pulses, the outputs of the bl The input of the measurement time through the first converter of the decimal code to the binary-decimal is connected respectively to the inputs of the second pulse counter. in | lkhod which is connected to the first input of the first element and the first input of the second element And connected to the output of the volume flow meter, the output of the second element And connected to the counting input of the first pulse counter, the second input of the first element And connected to the output of the stable frequency generator, the output of the first element Td is connected to the counting input of the second pulse counter, the outputs of the first input block of coefficients through the second converter of the decimal code to the binary decimal are connected respectively to the inputs of the first counter and pulses, characterized in that, in order to expand the scope of application, two elements are introduced into it, the element is NOT, three; the pulse counter, the third converts the decimal code into a binary-decimal, and the second coefficient input unit, the outputs of which through the third Converter decimal code in binary decimal connected respectively with the inputs of the third counter, pulses, the counting inputs of which. connected to the outputs of the third and fourth elements And, the control input of the third pulse counter is connected to the output of the trigger pulse generator, the output of the third pulse counter is connected to the second input of the second element and to the first input of the fourth element And frequency, the third input is connected to the output element NO, the input of which is connected to the output of the second pulse counter, the inputs of the third element I are connected respectively to the outputs of the volume ratio skidometer and second pulse counter. Sources of information taken into account in the examination 1. Patent IT 3965341, cl. G 06 F 15/20, G 06 F 1/00,. publish 1976. 2. USSR author's certificate for application number 2841961/24, cl. 6 06 F 15/46, G 01 F 1/00, 11/06/19. SSL