SU1401385A1 - Time marker of mirror-galvanometer oscillograph - Google Patents

Description

from 00

SP

07./

The invention relates to electrical measuring technique and can be used in various recording devices with mechanical and light recording of information on a moving tape.

The aim of the invention is to extend the functionality due to the possibility of fixing the current time on the storage medium.

FIG. 1 shows a functional diagram of the device; in fig. 2 is a functional block diagram of the formation of shifted imiuls; in fig. 3 - an example of lowering the current time to the information carrier (photo paper).

The timer of the light-beam oscilloscope contains a master oscillator 1 pulses, a divider 2 frequencies, a unit of forming shifted impulses, a counter 4, a multiplexer 5, a counter 6, resistors 7-9 and a galvanometer 10. The output of the master oscillator 1 imulsov connected to the divider 2 frequency input, outputs the first to the fifth, which are connected to the corresponding information inputs of the multiplexer 5, and the n + fy, n-f2-fi and n + 3th outputs of the splitter frequency 2 are connected respectively to the first, second and third inputs of the forming unit 3 shifted pulses However, the first output of the latter is connected via a resistor 7 to the input of a galvanometer 10, and through a counter is connected to the input of a counter 6, the output of which is connected via a resistor 8 to the input of a galvanometer 10, and the second output of the unit of forming shifted pulses is connected to the counting input of a counter 4 and the input of the gate of the multiplexer 5, the outputs of the counter 4 are connected to the corresponding control inputs of the multiplexer 5, and the output of the latter through a resistor 9 is connected to the input of the galvanometer 10.

 Block 3 of the formation of shifted pulses contains elements 11 and 12 and unibibers 13 and 14. The first inputs of the elements 11 and 12 are combined and are the first input of block 3, the second input of the element 11 and 11 The second input is block 3, and the second input of AND 12 is the third input of block 3, the outputs of elements 11 and 12 are connected to the inputs of single-oscillators 13 and 14, respectively, and the outputs of the latter are the second and first outputs of the shifted pulse shaping unit 3 .

The timer of the light beam oscilloscope works as follows.

The marker can be built to any account capacity (for example, consider the operation of a timer with a capacity of 9999 s). To do this, it is necessary to fix within the second interval 16 pulses of the code {four tetrads with four pulses of code in each).

From the (n + 1) th output of the splitter 2 frequency, pulses are received at the first input of block 3 of the formation of shifted pulses, following a frequency of 1 Hz, and from (n- | -2) -th

and (n- | -3) th output of the splitter 2 frequency, respectively, direct and inverted pulses with a frequency of 20 Hz are received. The duration of the pulses with the (n - (- l) -ro output of the splitter 2 frequency should in this case be chosen such that over a period of 1 s

0 at the outputs of block 3, packs of 16 pulses were formed, following with a frequency of 20 Hz and shifted by half the period of this frequency for each output.

The pulse sequence, which is shifted relative to the time of the occurrence of the time stamp (1c), goes to the control counter 4 and to the gate input of the multiplexer 5, determines the duration of the output code pulses. With each pulse of this sequence, at the output of the multiplexer 5, a code bit (one or zero) occurs, which characterizes the state of one of the triggers of frequency divider 2, the outputs of which are connected to the information inputs of multiplexer 5.

c At the second output of the shifted pulse shaping unit 3, the first pulse of the sequence coincides with the moment of the appearance of the digitized time stamp of 1 s. The signals from the combined outputs of the block 3 of the forQ of shifting ipulses and multiplexer 5 connected through resistors 7 and 9 form the following picture on the oscillogram (Fig. 3): from the moment the time stamp appears, the clock pulses begin to be fixed on the information carrier, they are impulses

5 tag code. The amplitude of the code pulses is somewhat greater than the amplitude of the clock pulses.

To distinguish multiple units of digitization of time stamps, clock pulses from the output of shifting pulse shaping unit 3 are fed to counter 6, at the output of which marking pulses are generated, which are summed on the galvanometer 10 through a resistor 8. Marking pulses indicate where the code of months, days are located , hours, minutes or, as in FIG. 2, thousand hours, hundreds, tens, units of seconds.

Thus, the timer allows you to unambiguously determine the points in time at which the recording of signals on the information carrier is carried out during short-time runs of the arc at arbitrary and distant points of time from each other.

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Claims (2)

1. The timer of the light-beam oscilloscope, containing a galvanometer, a frequency divider, a counter, a multiplexer and a master pulse generator, the output of which is connected to the input of the frequency divider, the first to the nth outputs of the last are connected to the corresponding information inputs of the multiplexer, which differs from , in order to extend the functionality, a shifting pulse shaping unit, a second counter and three resistors, the first terminals of which are connected to the input of a galvanometer, are inserted. the a (n + 1) -th, () - and (n- | -3) -th outputs of the frequency divider are connected to the first, second, and third inputs of the shifted pulse shaping unit, the first output of which is connected to the second terminal of the first resistor and the first counter is connected to the second input of the second resistor, and the second output is connected to the counting input of the second counter and the gate of the multiplexer gating, while the outputs of the second counter are connected to the corresponding control inputs of the multiplex chip, and the output of the latter is connected to the second output of the third resistor ra. 2. The marker according to claim 1, wherein the shifted pulse formation unit comprises two AND elements and two single vibrators, wherein the first inputs of the AND elements are combined and are the first input of the block, the second input of the first AND element is. the second input of the block, and the second input of the second element I is the third input of the block, while the outputs of the elements AND are connected respectively to the inputs of the first and second one-oscillators, and the outputs of the latter are respectively the second and the first outputs of the shifting pulses unit. TactoyA / e u ny / ibc & f / fodoSA / e Sj (2 8x1 О О ABOUT Hap / fe u / u 1 / L // 7 bc