SU1282195A2 - Device for processing signals from magnetic medium - Google Patents

Abstract

The invention relates to the field of instrumentation and is intended for automated processing of information stored on a magnetic tape. The purpose of the invention is to increase the speed and accuracy of the device. It contains block 11

Description

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WITH

N)

playback, from which the measurement information through an analog-to-digital converter 2 in certain sections enters the information processing line 3. The formation of a control signal for entering the plot with recording dynamic calibration signals is performed in switching unit 9 at the beginning of the second and the end of the penultimate clock pulses (C). These C, corresponding to the beginnings of dynamic calibration signals, come from the output of the decoder 7 of the digital converter. The received control signals through a group of switches 16, element OR 18, the first circuit AND 15, the circuit OR 14 arrive at the control input of the element AND 19, open

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The invention relates to instrumentation and can be used in the processing of information accumulated on magnetic media, and is an improvement of the known device according to the author; No. 830529. The purpose of the invention is to increase the speed and accuracy of information processing.

FIG. 1 is given a block diagram of the proposed device; in fig. 2- time diagrams that show the work of known and proposed devices.

The device (Fig. 1) contains a playback unit 1, from which the measurement information (Fig. 1a, from t and, for example, to t,) through analog-to-digital converter 2 enters the information processing line 3, service information (mode, time stamps). , signs of calibration signals) enters into Zlok 4 information selection and in block 5 threshold elements (switch marks). The information selection unit 4 is connected to the digitizer 6, the outputs of the decoder 7 of which are connected respectively to the unit 8 in the selection of features of the calibration signals, the switching unit 9, to the OR element

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him. In this case, an analog-digital converter 2 is polled by pulses of a reference frequency generator 20. The input of the dynamic calibration signals to the information processing line 3 begins. When reproducing a series of dynamic calibration signals, the counter 21, element 22 and trigger 23 use the clock signals corresponding to the beginnings of the calibration signals to generate control signals for sequential input of each calibration signal in sections whose boundaries correspond to the beginning of the signal and the end of the transition process. The starting point of the calibration signal coincides with the start of the input area. 2 Il.

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NOT 10 and to the input of the first group of switches 11. Other inputs of the first group of switches 11 are connected to the outputs of a constant voltage source 12, information selection unit 4 and 5 threshold elements, and its outputs are connected to input element OR 14 through element 13. The other output of the first group of switches 11 is connected to the input of the element AND 15. The output of the element OR NOT 10 is connected to one of the inputs of the element 13. Some of the outputs of the attribute extraction unit 8 of the calibration signals are connected to the second group of switches 16 directly to others exits - via trigger 17, additional AND and trigger. The outputs of the second group of switches 16 through the elements OR 18, AND 15, OR 14 are connected to the input element AND 19, the other input of which is connected to the generator 20 of the reference frequency, and its output - with analog-to-digital Converter 2, unit 9 switching and the counting input counter 21, the other input is connected to the output of the decoder 7 of the digital converter 6 and is the input of an additional element And 22, and its output is connected to one of the inputs of an additional 3112

trigger 23. The output of switching unit 9 is connected to one of the inputs of block 8 for the allocation of signs of calibration signals.

The device works as follows.

When the device is turned on, the measuring information (Fig. 1a) from the playback unit 1 (Fig. 2) is fed to the input of the analog-digital converter 2. At the same time, along two other service channels, the numbers of the mode and time stamps (Fig. IS) and the signs of the signals calibration is received in block 4 of information (Fig. 2). Separate kayalu in the form of constant voltage levels, the block 5 of the threshold elements receives the switch positions if the measurement information is accumulated on a magnetic tape from several sensors through the switch. If necessary. Inputting information processing line 3 to the set values of the calibration signals (minimum and maximum levels) turns on all three switches of the second group of switches 16.

When playing the minimum calibration signal on the output bus About the decryptor of the 7 of the digital converter 6, the control voltage is generated, which is fed to the block 8 in the selection of the signs of the calibration signals. This block forms the voltage of the input section of the minimum level of the calibration signal, which through the second group of switches 16 (Fig. 1), element OR 18, element OR.15 and element OR 14 feeds the potential of the logical unit to element And 19, pulses the reference generator 20 and refreshes the analog-to-digital converter 2 and the steady-state value of the minimum calibration signal from the set moment begins to be entered into the information processing line 3. The element 15 is hereby opened by the control voltage from the output of the first group of switches 11, regardless of the position of its switch 24. If switch 24 is in the upper position (FIG. -2), information is entered into the information processing line 3 only in the selected mode number for the control voltage from the bus output e of the decoder 7 digit transform 95 4

If the switch 24 is transferred to the lower position, then in this case, the constant voltage source 12 is applied to the element 15 and information is entered into the information processing line 3 in all recording modes. I

Simultaneously with the start of the survey

analog-to-digital converter 2 pulses of the generator 20 of the reference frequency, these pulses through the switching unit 9 are fed to the input of the characteristic extraction unit of the calibration signals. This unit, when Tj) e6yeMoro reaches the minimum calibration signal, completes the signal by which element 19 (fig. Closes, the input of the minimum signal of calibration to the information processing line 3 is stopped, and the generator frequency pulses of the reference frequency to the input of the outgoing block 8 are stopped) Signs of calibration signals.

Similarly, as with the input of the minimum level of the calibration signal, the information is entered into the information processing line 3 of the established values and the maximum level of the calibration signal. In this case, the formation of the input area is also carried out in block 8 of the indication of the calibration signals from the control signal of the bus J of the decoder 7 of the digital converter 6.

When dynamic calibration signals are reproduced (Fig. 1a), switching unit 9 from the output buses of the decoder 7 of the digital converter 6 is supplied: from bus b — the control voltage is a sign of dynamic calibration signals and from bus a — sync pulses corresponding to differences in the signal from the dynamic calibration.

Switching unit 9 allocates dynamic calibration sync pulses and transmits them to the attribute selection block 8, at one of the outputs of which, with the arrival of the second sync pulse t (Fig. 1c), a signal is generated, on whose leading edge trigger 17 (Fig. 2) is set to position 1 (tj, fig. 1d). With the arrival of the penultimate clock pulse (t, fig. 1 b), a signal is generated at the other output of the same block 8, on the leading edge of which the trigger 17 is set to the O position (t of fig. L-z). The input voltage obtained from tj to t (Fig. 1) thus obtained is applied to one of the inputs of the additional element 22.

Simultaneously, the clock pulses corresponding to the beginnings of the dynamic calibration signals from the output bus d of the decoder 7 of the digital converter 6 (Fig. 2) arrive at the R input of the counter 21, embed it, and also at the input of the additional element AND 22. With the arrival of the second clock pulse ( t, Fig. 1B, -d), coinciding with the second dynamic calibration signal (with the first input signal), the additional element I 22 opens and this clock pulse goes to the S-input of the additional trigger 23 via the bus. This trigger is set to the unit On the voltage, and the voltage from its output through the second group of switches 16 (Fig. 2), the element OR 18, the element AND 15 and the element OR 14 is fed to the element AND 19. At the same time, the analog-to-digital converter 2 begins to be polled by pulses from the generator 20 of the reference frequencies and the input to the information processing line 3 of the second dynamic calibration signal (Fig. 1a) begins; at the same time, these pulses arrive at the counting input of the counter 21 (Fig. 1). 2). Upon reaching the required input area from t to t); (Fig. I). the dynamic calibration signal at the output of the counter 21 produces a signal that translates the additional trigger 23 to the state O

(Fig. 2), Element I 19 is closed, the input of the dynamic calibration signal to the information processing line 3 is stopped, and the pulses of the reference frequency generator 20 are fed to the counting input of the counter 21. With the arrival of the third clock pulse (t, Fig. 1b) corresponding to the beginning the third dynamic calibration signal (the beginning of the second input signal), the counter 21 is zeroed, an additional element of AND 22 is given a signal of a logical unit, and so on, i.e. The cycle of operation of the device at the input of the third dynamic calibration signal is repeated, and so on until the penultimate dynamic calibration signal is entered (, Fig. 1).

Claims (1)

Invention Formula A device for processing signals from a magnetic carrier by author. No. 830529, characterized in that, in order to increase the speed and accuracy of information processing, a counter, an additional AND element and an additional trigger are entered into it, a trigger is connected between one of the inputs of the second group of switches through the series-connected additional AND element and an additional trigger and additional two outputs of the block of signs selection of signals, In this case, the reset input of the additional trigger is connected to the output of a counter connected by a counting input to the output of the third element I, and a reset input to the corresponding first input of the switching unit and another input of the additional element I. About to tz tgts 6 1234 0 ti tj t 0 tj. tgxtj (pa8.2 H / 7- / / 7 At t