SU1651852A1 - Device for analyzing eyelid movement response - Google Patents

Abstract

The invention relates to medical technology. The aim of the invention is to improve the accuracy of the assessment of the state of the operator by obtaining quantitative information about the components of the vectomotive reaction, which is achieved by building a processing unit 4 with three channels and channels 6, 7, 8 with elements 2 and 1.0. 11, counters 12, 13, 18, parallel registers 14, 15, 19, as well as using a pulse generator 9 and an inverter 20. The input signal of the processing unit goes directly to the inputs of channels 6 and 8 and through the inverter 20 to the input of channel 7, determined the number of pulses in a pack, and the counters 12, 13, 18 count the number of pulses in a pack from the generator .9 pulses 9, proportional to the open and closed state of the eye, as well as the blink rate. 1 il.

Description

§

ABOUT

the next

The invention relates to medical technology, namely to devices for monitoring the state of the operator.

The purpose of the invention is to improve the accuracy of the assessment of the state of the operator by obtaining quantitative information about the components of the vecomotive reaction.

The drawing shows a block diagram of the proposed device.

The device contains an invisible radiation source 1, connected in series by a photodetector 2, amplifier-shaper 3, processing unit 4 and display unit 5, the processing unit 4 consisting of three channels 6-8, the first inputs of which are connected to a generator of 9 pulses Channels 6 and 7 include serially connected elements 2 and 10 (11), whose inputs are channel inputs, counter 12 (13) and parallel register 14 (15), and channel 8 consists of a series-connected frequency divider 16, whose input is the first entrance of the synchronization circuit 17, the counter 18, the second input of which is the second input of the channel and the parallel register 19, the second inputs of channels 6 and 8 are connected to the input of processing unit 4 directly, and the channel 7 through the inverter 20, to the output of which is connected and synchronization circuit 21, the second output of which is connected to the input of the processing unit 4, and its outputs are connected respectively — the first to the counter 12 and the parallel register 15, and the second to the counter 13 and the parallel register 14

The device works as follows.

An invisible source of light 1 is directed to the operator’s eye. Reflected from the eye stream enters the photodetector 2, which converts it into electrical signals, which through the amplifier-shaper 3, which converts them into a logical form (O or 1), is fed to the input of the processing unit 4.

In block 4 of the processing, the parameters of the vecomotive reaction are determined, such as the time of the closed and open states of the eye, the frequency of flashes as follows.

Consider the operation of channel 6. The second input of logic element 2I 10 receives pulses of the measured signal, and the first input — pulses of the clock frequency of the generator 9 pulses. A modulated clock frequency with a measured signal — a burst of pulses whose duration corresponds to the duration of a closed eye — appears at the output of logic element 2I 10. The scale of measuring the duration is determined by the frequency of the pulse generator 9, i.e. the number of pulses per packet, the number of which is counted by a counter of 12 pulses. At the end of the counting, the result from the pulse counter 12 of the clock pulse supplied from the second output of the synchronization circuit 21 is written into the parallel register 14, and before the start of the counting clock pulse from the first

0, the output of the clock circuit 21 zeroes the pulse counter 12. Thus, at the output of the first parallel register 14, the previous value of the measured value is constantly present.

5 The second measuring channel 7 works in the same way as channel 6, with the only difference being that the measuring signals that are inverted by the inverter 20 arrive at its input and in the second parallel register

0 15 stores information about the duration of an open eye.

In the third measuring channel 8, the recorded signals (pulses) go directly to the second input.

5 of the pulse counter 18, which counts the pulses corresponding to the number of flashes per unit of time, determined by the setting of the frequency divider 16. The blink rate information is stored in parallel register 19.

On the front of the measured signal, the synchronization circuit forms a short reset pulse for the counter of 12 pulses and a write signal to the parallel register 15. a

5, by the decay of the measured signal, forms a short pulse for writing to the parallel register 14 and for resetting information in the counter of 13 pulses.

Scheme 17 synchronization forms

0 reset and write signals, respectively, on the edges and decays of clock pulses, coming from the output of the 16 frequency divider.

From the outputs of the parallel registers 14, 15 and 19, information is fed to the diction unit 5, which may contain three digital boards for indicating the measurement results for each measuring channel, as well as interface circuits for providing input of the received information to

0 microcomputers for further processing and storage.

The use of the proposed device (unlike the known ones) allows to obtain in digital form an operational

Claims (1)

5 information about the main parameters of the vecro-motor reaction: the time of an open eye, the time of a closed eye, the frequency of flashes in the process of professional activity of a human operator, and consequently, increase the reliability of the analysis results, accumulate statistical data on the parameters of the vecomotive reaction and provide a quantitative comparison of the results of experiments in different methodological conditions, the claims of the device for the analysis of vecomotive reaction, containing the source of invisible for the eye radiation and connected in series a photodetector, an amplifier driver, a processing unit, a display unit, the processing unit comprising a pulse generator connected to a frequency divider, and a counter, characterized in that by counting quantitative information on the components of the motor-motor reaction, the processing unit is equipped with two channels consisting of series-connected elements 2I. the second counter, a parallel register, and the channel inputs are connected to the input of the rebo1 block, respectively, directly through the inverter, and their outputs are the outputs of the processing unit, 8 to the second inputs of the channel elements 2I, the pulse generator, and the first synchronization circuit, inputs which is connected respectively to the input of the processing unit and the output of the inverter, its first output is connected to the second counter of the first channel and the parallel register of the second channel, and the second to the second counter of the second channel and parallel reg rub first channel, the output of the frequency divider coupled to the second synchronization circuit, the first output of which is connected to the second parallel register and second- to the counter, the output of which is connected to another input of the second parallel register, whose output is a third output of the processing unit.