SU1034705A1 - Device for analysis of biological signals - Google Patents

Abstract

1. DEVICE FOR THE ANALYSIS OF BIOLOGICAL signals, comprising: serially coupled analog converter zapominayuishy unit, the calculator, as well as an oscilloscope, AND gate whose output is connected to the input vgachislitel synchronization, clock generators, connected in series first and second counters, digital-to-analog converter , that is so that, in order to improve the reliability of the analysis of biological signals, a synchronization block, third and fourth counters, multi The lexor, the first comparison unit and the three elements of the terminal, the clock pulse generator are connected to the input of the third counter, the output of which is connected to the input of the first counter, the second output of the analog-to-digital converter through the first control element .. is connected to the second input of the storage unit and the first input of the fourth counter and multiplexer, the output of which is combined with the third input of the storage unit, the second input - with the output of the fourth counter and the first input of the synchronization unit; 3ations, and the third input - with the second output a third counter, a first input. the first comparison unit and the second input of the synchronization unit, the third input of which is connected to the output of the second counter and the second input of the first comparison unit, the fourth input to the output of the second control element, and the output connected to the synchronization input of the oscilloscope, the modulating input of which is connected to the first input of the AND element and the output of the first unit of comparison, and the signal input through a digital-to-analog converter is connected to the output of the storage unit, the second input of the element I is connected to the output of the third (L and the third one, the input - with the output of the first counter. 2. The device according to claim 1, characterized in that the synchronization unit contains serially connected registers connected to its third input, the second comparison unit, the switch, the output of which C / E 4 connected to the output of the synchronization unit, as well as the third comparison unit, the output of which is connected to the second input of the switch, the first input is connected to the first input of the synchronization unit O, and the second input is connected to: l the second input of the second comparison unit and the second input of the sync unit four which entrance is connected to the second register input and the third input of the switch.

Description

The invention relates to medical technology and can be used to process medical data during surgery and in the postoperative period. The device allows processing of any Biomedical. signals — electrocardiogram, rheogram, etc. A device is known — for automatically registering a pulse curve, containing a cycle counter, an analog-to-digital converter, a memory device, an amplifier, a trigger circuit :, comparison, output and control units, a switch, a recorder, and allowing determine the shape of the pulse curve P}. A disadvantage of the known device is the inability to process signals of highly distorted forms. The closest to the proposed technical entity is a device for medical data processing, containing an analog-digital converter, serially connected memory device and computer, as well as serially connected digital-analog converter and oscilloscope connected to the memory output, tag generator, which includes the first and second counters 2 connected in series; However, this device has low reliability in and so / that it should have the oscilloscope screen a large afterglow, so that you can observe not only the current information, but also the previous; If the generator of the label generator or the binary counter fails, the label on the oscil / iocKona screen does not coincide with the information entered into the computer and there is no information control signal directly to the computer. In addition, it is impossible to present on the screen of an oscilloscope an enlarged image of the information part of interest. The purpose of the invention is to increase the reliability of the analysis of biological signals. The goal is achieved by the fact that a device containing a serially connected analog digital converter, a storage unit, a calculator, and an oscilloscope have an AND element whose output is connected to the synchronization input of the calculator, a clock pulse generator connected in series first and second counters, digital-to-analog converter, a synchronization block, the third and fourth counters, a multiplexer, the first comparison block and three, of the control element, the clock generator connected to the input The third counter, the output of which is connected to the input of the first counter, the second output of the analog-digital converter through the first control element is connected to the second input of the storage 6jioKa and the first inputs of the fourth counter and multiplexer, the output of which is connected to the third input of the storage unit, the second input - to the fourth output the counter and the first input of the synchronization unit, and the third input with the second output of the third counter, the first input of the first comparison unit and the second input of the synchronization unit, the third input connected with) the output of the second counter and the second input of the first comparison unit, the fourth input with the output of the second control element, and the output is connected to the synchronization input of the oscilloscope, whose modulation input is connected to the first input of the And element and the output of the first comparison unit, and the signal input through a digital-to-analog converter is connected to the output of the storage unit, the second input of the AND element is connected to the output of the third control element, and the third input is connected to the output of the first counter. The device synchronization unit contains serially connected registers connected to its third input, the second comparison unit, the switch, the output of which is connected to the output of the synchronization unit, and the third comparison unit, the output of which is connected to the second input of the switch, the first input is connected to the first input of the synchronization unit, and the second input is connected with the second input of the second comparison unit and with the second input of the synchronization unit, the fourth input of which is connected to the second input of the register and the third input of the switch. The drawing shows a structural electrical circuit of the device. The device contains serially connected analog-to-digital converter 1, memory unit 2, calculator 3, as well as oscilloscope 4, element 5 And, the output of which is connected to the synchronization input of calculator 3, clock pulse generator 6, serially connected first 7 and second 8 counters, digital-to-analog Converter 9, synchronization unit 10, third 11 and fourth 12 counters, (Multiplexer 13 first comparison unit 14, first 15, second 16 and third 17 control elements, with clock generator b connected to the input of the third the counter 11, the output of which is connected to the input of the first counter 7, the second output of the analog-digital converter 1 through the control element 15 is connected to the second input of the e-memory unit 2 and the first inputs of the counter 12 and multiplexer 13, the output of which is connected to the third input of the storage unit 2, the second input with the output of the counter 12 and the first input of the synchronization unit 10, and the third input with the second output of the counter 11, the first input of the comparator unit 14 and the second input of the synchronization unit 10, the third input of which is connected to the output of the counter 8 and W The fourth input of the comparison unit 14, the fourth input with the output of the control element 16, and the output are connected to the synchronization input of the oscilloscope 4, the modular input is connected to the first input of the 5A element and the output of the comparison unit 14, and the signal input through the digital-to-analog converter 9 is connected to the output of the storage unit 2.

. In addition, the second input of element 5 I is connected to the output of control element 17, and the third input is connected to the output of counter 7.

The synchronization unit .10 contains connected to its third input serially connected register 18, the second comparison unit 19, the switch 20, the output of which is connected to the output of the synchronization unit 10, as well as the third comparison unit 21, whose input is connected to the second input of the switch 20, the first input is connected to the first input of the synchronization unit 10, and the second input is connected to the second input of the comparison unit 19 and to the second input of the synchronization unit 10 whose fourth input is connected to the second input of the register 18 and the third input of the switch 20.

The device works as follows.

Control element 15 is set to the position at which the output of the synchronizing pulse. the analog-digital converter 1 is connected to the inputs of the counter 12 of the multiplexer 13 and the storage unit 2,

The control element 16 is set to a position in which the signal arriving at the switch 20 connects the output of the block 21 to the synchronization input of the oscilloscope 4.

The signal from the control element 17 prohibits the passage of control pulses to the calculator 3.

The input signal arriving at the input of the analog-digital converter 1 is converted into a code that arrives at the information input of the storage unit 2. Synchronously with the information, the converter 1 at the second output gives a strobe pulse, which through the element

15 is fed to the counting input of the counter 12 and the control inputs of the multiplexer 13 and block 2. When a strobe pulse arrives, multiplexer 13. connects the counting outputs 12 to the address inputs of the storage unit 2, and the address corresponding to the counter code 12 is recorded information in block 2. With the arrival of each gating pulse from the converter 1,

0 counter 12 increases (on its back, front, code on the unit and the information is recorded once at a new address.

Since the capacity of the counter 12 is equal to 5 in the number of addresses N of block 2, then when the counter 12 is overflow, the information is stored in the memory block 2 again at the first address, i.e. the information in block 2 is written cyclically.

At the time between two strobe pulses from converter 1, block 2 is in read mode and multiplexer 13 connects the OUTPUT of counter 11 to the address inputs of block 2, from which information is read in accordance with counter code 11. The frequency f of generator 1 is KN times higher than the frequency of conversion of analog-to-digital converter 1 and during the time between two clock pulses of converter 1 from block 2 K, all information that goes to digital-to-analog converter 9 and calculator 3 is counted.

 When the counter codes 11 and 12 coincide, the comparison unit 21 generates a pulse, which through the switch 20 goes to the clock input

Oscilloscope 0 4. The sweep time of the beam on the oscilloscope 4 is chosen equal to the time of filling the counter with 7 generator 6 pulses:

i N

45 p-

ip

-time beam sweep;

Where

N

- counter capacity;

- generator frequency b.

i Since the number of addresses

0

block 2 is equal to the capacity of the counter 11, then all information stored in the storage unit 2 will be displayed on the screen in time -Lpr.

The sweep of the beam on the screen of the oscillosis 5 of the cop 4 begins on a pulse from the output of the comparison unit 21 at the time of the coincidence of the codes of the counters 11 and 12. The screen displays the information recorded in the storage unit 2

G consistently to all addresses.

Thus, the information recorded in the memory of block 2 is continuously read, and an image of the input

5 of the signal moving from right to left at a rate corresponding to the frequency ipp of the conversion of the angular-to-digital converter 1, with the newly received information being displayed on the screen to the right. To stop the information moving on the screen, it is necessary to switch to the storage mode, for which the control element 15 is set to the position in which the output pulse of the converter 1 is disconnected from the inputs of the counter 12, the multiplexer 13 and the memory of the block 2. At the same time, the multiplexer, 13 connects the output of counter 11 to the address inputs of block 2, which go into read mode. . Thus, in the storage mode, the screen displays the fixed information recorded in block 2 at the time of the transition to the storage mode. An overflow impulse 11 is fed to the input of counter 7, and an overflow impulse of counter 7 to the input of counter 8. If the counter codes 11 and 8 coincide, comparator 14 outputs a pulse to the modulating input of the oscilloscope 4 and the luminous label is displayed on the screen where it is displayed The information from block 2 is read at the address corresponding to the code of counter 11, which coincides with the counter code 8 at this time. When the SRI of the counter 8 is filled with overflow pulses of the counter 7, the brightness mark on the screen moves along the stationary The image of the signal recorded in block 2. The speed of movement of the mark is determined by the capacity of the counter 7. In order to enter the operator’s information displayed on the screen at the moment the touch label matches the desired point of reference, the button in the control element is pressed. 17 input information. In this case, the sync pulse at the output of element 5 and appears at the time of the pulse coincidence. C of the comparison unit 14 and the counter overflow pulse 7. The duration of the overflow pulse of the counter 7 is equal to the duration of one cycle of the counter 11, i.e. the time between overflow pulses of the counter 11. During this time, the counter code 11 coincides with the counter code 8 only once and the pulse at the output of the 5 U element (the information stored in block 2 at the address corresponds to the code on the output of the counter 8. When the button is pressed, the input is stopped. In order to examine in more detail on the screen of the oscilloscope 4 the input signal of interest in the storage mode, the device is set to zoom in by the element 16 when the luminous mark coincides with the beginning of the interesting signal signal. On the front-front of the control signal from element 16, the register 18 records the counter code 8 and switches 20 to the position where the output of the comparison unit 19 is connected to the synchronization input of the oscilloscope 4. The synchronization pulse at the output of the comparison unit 19 by is when the codes of the counter 11 and the register 18 coincide, i.e. the beam sweep on the screen starts when reading from the address of the storage unit 2, which corresponds to the position of the touch mark when the control circuit button 16 is pressed. The gain factor and the scanning speed of the beam of the oscilloscope 4 are great, the signal increased by the required number of times is obtained on the screen. The luminance .. label continues to move along the displayed signal and, if necessary, the button of the control circuit 17 enters the section of interest, the signal into the calculator, as described above. The image regeneration method allows displaying the primary signal on the screen with the same brightness, changing the image scale, changing the oscilloscope scan rate over a wide range, which is Impossible with tubes with a large afterglow ./ Also, when observing on the screen the signal that is formed the method, the physician is less tired than when observing a signal that draws a slow moving beam on the screen. Continuously moving on the screen, a solid image of the signal eliminates the omission of at least one signal period, which increases the likelihood of visual detection, undistorted signal, or extrasystoles. The CpiM operator selects on the screen among the distorted signals clean and presses it into the calculator by pressing the button. All of this ensures, when processing signals of a highly distorted form, greater reliability of the results obtained.

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Claims (2)

D. DEVICE FOR ANALYSIS OF BIOLOGICAL SIGNALS, containing · · - series-connected analog-digital converter, storage unit, calculator, as well as an oscilloscope, element And, the output of which is connected to the synchronization input of the calculator, a clock generator, series-connected first and second meters, The analog converter is distinguished by the fact that, in order to improve the reliability of the analysis of biological signals, a synchronization unit, a third and a fourth counter, a multiplexer, the first comparison unit and three controls, the clock generator is connected to the input of the third counter, the output of which is connected to the input of the first counter, the second output of the analog-to-digital converter through the first control element is connected to the second input of the storage unit and the first inputs of the fourth counter and multiplexer, the output of which is connected to the third input of the storage unit, the second input - with the output of the fourth counter and the first input of the synchronous block; 3-way, and the third input - with the second output of the third counter, the first input of the first comparison unit and the second input of the synchronization unit, the third input of which is connected to the output of the second counter and the second input of the first comparison unit, the fourth input is connected to the output of the second control element, and the output is connected to the synchronization input of the oscilloscope, the modulating input of which is connected to the first input element And and the output of the first comparison unit, and the signal input through a digital-to-analog converter is connected to the output of the storage unit, the second input of the element And is connected to the output of the third element equalization, and .input - with the exit of the first 2. The device according to π. 1, characterized in that the timing contains connected to its third input in series-connected register, the second block. Comparisons, switch, the output of which. A third counter is connected to the output of the synchronization block ^ 0, a sync block and a third comparison unit, the output of which is connected to the second input of the switch, the first input is connected to the first input of the synchronization unit, and the second input to the second input of the second block comparison with the second input of the synchronization unit, the fourth input of which is connected to the second input of the register and the third input of the switch. > wa to and by