SU739517A1 - Data input device - Google Patents

Description

The invention relates to the field of computer engineering and is intended for input into the RAM of electronic computers information 'presented in the form of a frequency-modulated' sequence of pulses.

A device for entering information containing a playback unit, a control trigger, a potential generator block, a time counter, a control unit, a start block and an accumulating counter [1].

This device is characterized by a constant quantization frequency and insufficient accuracy.

The closest technical solution to this device is. a device for inputting information · containing a reader, the first output of which is connected to the first input of the control unit, the second output is with the second input of the control unit, the first input of the first counter, the input of the first delay element, the output of which is connected to the first 'inputs of the second and third counters, a pulse generator, the output of which is connected to the third input of the control unit and the first input of the pulse distributor, the second input of which is connected to the first output of the control unit, and the first and second outputs are connected to by the second inputs of the second and third counters, a starter unit, the first input of which is connected to the output of the second delay element, the input of which is connected to the second output of the control unit, the fourth input of which is connected to the second input of the first counter and the input of the third • | Delay element, the output of which is' connected with the first, second, third and fourth pulse shapers connected in series, the outputs of which are the outputs of the device, the input of the first pulse shaper is connected to the output of the first counter, the inputs of the third and fourth pulse shapers connected to the outputs of the second and third counters [2}.

The disadvantage of this device is the lack of information compression.

The purpose of the invention is the compression of information.

The block diagram of the device shown in the drawing.

The device comprises a reading unit 1, a pulse generator 2, a block 3

X5 four, three control, first counter 4, counter 5, second counter 7 counter, pulse distributor, adder 9, decoder 10, start block 11, register 12, first pulse shaper 13, second pulse shaper 14, third shaper 15 pulses, the fourth driver 16 pulses, the first delay element 17, the second delay element 18, the third delay element 19 ........

The device operates as follows.

The device is synchronized by pulses of a meter of time with a frequency of £ _MB . The frequency is set by a quartz oscillator, its value is limited by the condition £ _МР , - £ _С , where f _с is the lowest frequency of the PFM signal. Nye configured uslo'viya this provides' entering the period between pulses £ _"at least one, PFM pulse signal. The quantization frequency is variable and automatically varies from £ _KVlogs - £ ^ _в for sections of a fast change of a signal Д ° Tallinn FOR sections of a constant value of a signal (К is an integer). Intermediate quantization frequencies are discrete equal and where

K-1,2-, 3. .,. .TO. , and are selected depending on the difference in the durations of the periods of the AT _{from the} PFM signal at the moments at ~ f '' Record '· is variable and depends on the rate of change of the signal. For a more accurate determination of the average values of £ s, the position of the momentum £ _mv within the period is fixed by determining the time interval between the timestamp pulse and the nearest left momentum £ _s , as well as the total duration of this period 1 /. These time periods are determined by the 0 count of high-frequency pulses £ _e »£ _s . The average value of the frequencies #, £ _s for the (j + 1) -th quantization period (determined taking into account the integer and fractional parts of the periods T _s , as well as the number of time stamp pulses r 4 Ύ, r <? TcA ^ic ^ ^OT MBW ^M V ^{j T} H) 'where is the path' of the pulses? ^ * 7 \ where T _c ·. - the duration of the period £ s, which coincided with the nearest preceding moment of taking the countdown (J-th `` Record ''); Tcj is the duration of the period £ s r coinciding with the next pulse of the timestamp.

time stamp period;

the number of pulses £ _mv for the quantization period;

- the length of the quantization period;

- the number of pulses | _s for the quantization period;

- part of the period T _{with to the} left of the (^ + 1) -th pulse '' Record

- the total duration of the period T _s , in which the (j + l) -ft impulse '' Record '' fell. The quantities and '^ are approximately equal:

• /

The absolute value of the difference aT ^ -j ambiguously determines the change in the frequency £ _c , therefore, the input signal. In order to unambiguously determine and select the appropriate quantization step, it is also necessary to take into account the time interval from the moment of the last counting to the current time stamp, as well as the average value; frequencies £ _s on this ^ interval. These values are determined by counting the number of time pulses and the number of signal impulses N _s . The difference DT _C .. is calculated and analyzed for each pulse of the timestamp £ _M in ” ^{and the} command“ take-off (“Record”) is formed only if the quantity aT ^. ·· exceeds a certain value, ^and the corresponding values of Hc · i.spolzu- These quantities _(as well yri are processed to determine the average values of the frequency f _c and linking these values with respect to time.

The quantization period T _kv is equal to the time interval between teams <

<4 <VV- ^T clSc · where Tj is the pulse period is high; the frequencies T ₉ s | -, ain _e and dnc- 'are the number of pulses £ _e ^1e for the corresponding time intervals. From the first and second outputs of the reading unit 1, impulses £ _c and £ _mb> are received. Pulses I fed to the first input unit 3 and the control input of the fourth counter 5. £ _NIL pulses fed to the second control unit 3 is input, a third input of the counter 7 and through the first. element 17 of the delay at the zero input of the second and third counters 6 and 7.

From the output of the 2-pulse generator, the pulses £ _e are supplied to the third input of the control unit 3 and the first input of the 8-pulse distributor. From the first and I second outputs of the 8-pulse distributor, pulses with a frequency of 5 _Oe are fed to the inputs of the second and third counters 6 and 7. For each pulse £ _s, these counters 6 and 7 are set to `` 0 ''.

6 ‘

If no impulse arrives during the period T _s , then at the end of the period before setting to `` 0 '' both ka 6 and 7 contain the same code ps

When the receipt control unit 3 is proportional to T _e . of the pulse is issued, from the first output by the command, the 8-pulse distributor to the command, the 8-pulse distributor stops the supply of pulses from the first output and on the third counter 7, the code is fixed (Г _ps / proportional to the part of the period between the pulses £ _с and £, and the pulses from the second output continue _(supplied to the input of the second counter 6. when the first (after the pulse) _{with a} pulse £ control unit 3 is issued with the second output command, for which the adder 9 expression ¹ batyvaet difference between code a.T ₆ ~~ code being in register 12, and code located in the second counter 6. From the output of the adder 9, the difference code goes to the first input of the decoder _; torus 10, the second and third inputs receive the codes N _c and N ^ c of the first and fourth counters 4 and 5. At the output • of the decoder 10, depending on the combination One or another value of the conditional code appears on the three inputs. After the conditional code appears on the first input of the start-up block 11, the second input from the output of the second delay element 18 receives a command, according to which the start-up block 11 gives the command `` Record '' if the conditional code has one of the permissive values. At the command '' Record ¹ ', the first, second, third and fourth shapers 13,14,15,16 pulses are interrogated and the codes of the first, second, third and fourth counters 4,6,7,5 in yes are received by the computer. The command '' Record ¹ '' is also received in the MOH to enter the generated code. The code of the total duration of the period from the third shaper ^{7 is} entered into register 12 for subsequent analysis. With the output of the third delay element 19, the device is reset.

By this

DOM of the control unit, the second output with the second input of the control unit, the first input of the first counter, the input of the first delay element, the output of which is connected to the first inputs of the second and third counters, a pulse generator, the output of which is connected to the third input of the control unit

Claims (2)

The invention relates to the field of computer technology and is intended for input into the operational memory of electronic computers information presented in the form of a frequency-modulated pulse sequence. A device for input is known: information containing a reproducing unit, control triggers, a potential generator unit, a time counter, a control unit, a start unit and an accumulating counter 1. This device is characterized by a constant quantization frequency and insufficient accuracy. . The closest technical breakthrough to this device is a device for entering information; a co-holding reading unit, the first output of which is connected to the first input of the control unit, the second output -.the second input of the control unit, the first input of the first counter, the input of the first delay element the output of which is connected to the first inputs of the second and third counters, a pulse generator, the output of which is connected to the third input of the control unit and the first input of the pulse distributor, the second input of which is connected to p The first and second outputs are connected to the second inputs of the second and third counters starting block, the first input of which is connected to the output of the second control element, the input of which is connected to the second output of the control unit, the fourth input of which is connected to the second input of the first counter and the entrance of the third. the delay element, the output of which is connected in series with the first, second, third and fourth pulse generators, the outputs of which are the device outputs, the input of the first pulse generator connected to the output of the first counter, the inputs of the third and fourth pulse shaper are connected to the outputs of the second and third counters 2. The disadvantage of this device is the lack of compression information. The purpose of the invention is information compression .., The block diagram of the device is shown in the drawing. The device contains a readout block 1, a pulse generator 2, a control block 3, a first counter 4, a fourth counter 5, a second counter 6, a third counter 7, a distributor 8 pulses, an adder 9, a diflator 10, a start block 11, a register 12, the first pulse shaper 13, second pulse shaper 14, third pulse shaper 15, fourth pulse shaper 16, delay element 17, second delay element 18, third delay element 19. The device works as follows. The device synchronizes the impulse itself for a time, frequency f ,. The SEac frequency f is set by a quartz oscillator, its magnitude is limited by the 5, lower frequency of the PFM signal. Fulfillment of this condition ensures that at least one pulse arrives in a period of a maysdu, a pulse of a PFM signal. The quantization frequency is variable and automatically varies within the areas of a fast signal change and for a constant signal value (K is an integer). Intermediate values of the frequency of quantization are discrete and equal to K-1,2,3 ..... K., and are chosen, depending on the difference in the durations of the periods of the RECEPTION signal at the instants of the pulse duration, -j Tc., --Tc4, where Tj ;. - the duration of the period fc, which coincided with the closest preliminaries to the readout record; - the duration of the period Ic, which coincided with the next pulse of the time stamp. The absolute value of the difference ambiguously determines the change in frequency f. and, therefore, the input signal. To unambiguously determine and select the appropriate quantization step, it is also necessary to take into account the time interval from the moment, the last sample to the current time stamp, and the average frequency {. on this interval. These values are determined by counting the number of time pulses of the number of signal impulses KC. The difference between LTs ... is calculated and analyzed by the time stamp impulse the command to remove the reference (Record) is formed only if / t exceeds the value of some c- ij - the value corresponding to the values and HC - Et: th values and. are also used (U) and processing to determine the average values of the -f frequency f j. and bind these values over time. The quantization period is equal to the time interval between the recording commands. The recording is variable and depends on the rate of change of the signal. For a more accurate determination of the mean values of C, the position of the pulse c within the period is fixed by determining the time interval for the month by the pulse of the time stamp and the closest pulse from the left as well as the total duration of this period. These time intervals are determined by counting the high frequency pulses e s. l. $. for the (J + 1) -th quantization period, it is allocated taking into account the integer and fractional parts of the periods Tc, as well as the number of pulses of the time stamp E. (TC) timestamp period; number of pulses quantization period; the duration of the quantization period; the number of pulses f for the quantization period; part of the period of the left of the () th pulse; Record; full duration of period T (- which the (+1) th pulse is written to. The values of Te and T (. are approximately equal: rfT –T / rt; T., where the period of high frequency pulses, atfne and rfnc are the number of pulses f the first and second outputs of the reading unit 1 receive pulses f c and 5,. The pulses go to the first input of the control unit 3 and the input of the fourth counter 5. The pulses go to the second input of the control unit 3, the input of the third counter 7 and through the first element 17 of the delay on the zero inputs of the second and third counters e and 7. From the output Yes generator 2 pulses pulses fg arrive at the third input of control unit 3 and the first input of pulse distributor 8. From the first and second outputs of the distributor 8 pulses and 1 pulses with a frequency of arrival to the inputs of the second and third counters 6 7. For each pulse 1, the counters indicated 6 and 7 are set to O. If during the period Tc the pulse f has not arrived, then at the end of the period before being set to O both counters b and 7 contain the same code he proportional to T, When the pulse J arrives, the control unit 3 outputs, with the first command output xV dispenser 8 pulses. According to this command, the distributor 8 pulses stops the supply of pulses from the first output and a code is fixed on the third counter 7 (i is proportional to the period between pulses C and J, and the pulses from the second output continue to flow to the input of the second counter 6. On the first (after pulse) fc, the control unit 3 issues from the second output a command according to which the adder 9 generates the difference code,, T between the code located in register 12 and the code located in the second counter B. From the output of adder 9 the difference code goes to first entry desh If the digitizer 10, codes NC and the first and fourth counters 4 and 5 are supplied to the second and third inputs, one or another value of the conditional code appears at the output I of the decoder 10, depending on the combination on the three inputs. The first input of the start-up unit 11 to the second input from the output of the second element 18 of the custody receives a command, according to which the start-up unit 11 issues the Write command if the conditional code has one of the allowable values. On the Record command, the first, second, third, and fourth formers of 13, 14, 15, 16 pulses are polled and the codes of the first, second, third, and fourth counters 4, 6, 7, 5 are issued to the computer MOZU. The Write command also enters the MOZU to enter the generated code. The code for the full duration of the period from the third former 15 enters the register 12 for subsequent analysis. From the output of the third delay element 19, the device is inserted into the initial state. Formula of the invention. An information input device containing a reading unit, the first output of which is connected to the first input of the control unit, the second output | to the second input of the control unit: the first input of the first counter, input the first delay element whose output is / is connected to the first inputs of the second and third counters, a pulse generator, the output of which is connected to the third input of the control unit and the first input of the impulse distributor The second input of which is connected to the first output of the control unit, and the first and second outputs are connected to the second inputs of the second and third counters, the start block, the first input of which is connected to the output of the second element: a delay, the input of which is connected to the second output of the control unit the input of which is connected to the second input of the first counter and the input of the third delay element, the output of which is connected to the first, second, third and fourth pulse shaper serially connected, the outputs of which are with the outputs of the device, the input of the first pulse generator is connected to the output of the first counter, the inputs of the third and fourth pho4) Worlds of pulses are connected to the outputs of the second and third counters, characterized in that, in order to compress the information, it contains a fourth counter, serially connected register and a decoder, the second input of which is connected to the output of the first counter, the third input to the output of the fourth counter and the input of the second pulse shaper, and the output to the second input of the start block, the second input of the sum the mator is connected to the input of the third pulse generator, the output of which is connected to the register input, the third input of the Matopa sum is connected to the second output of the control unit, the second input of the fourth counter is connected to the second input of the first counter, the output of the start block is the device output. Sources of information taken into account during the examination 1. USSR author's certificate f 439799, cl. G About F 3/05, 1971. 2. USSR author's certificate for application No. 2416725/24, cl. G 06 F 3/05, 1976.