SU908320A1 - Device for evaluating operator's state - Google Patents

Description

one

The invention relates to automation and computing and can be used in devices for training operators in the management of automated systems, in the process of conducting engineering and technical studies, as well as in the professional selection of operators.

A device for analyzing the time of an open and closed eye state is known, comprising an open and closed eye state sensor, an amplifier-converter, a feedback unit and an express processing unit 1

However, this device records the level of operator fatigue, but does not allow to assess the degree of perceptual readiness by analyzing the scanning movements of the eyes.

Closest to the present invention is an eye movement test device comprising sensors, an amplifier, an OR element, counters and a recorder, as well as an analog-to-digital converter, a decoder, a one-shot, logic circuits AND, a pulse generator, a multiplexer, a distributor, and a 2-D digital converter.

The disadvantage of the device is the low efficiency of its use for the evaluation of perceptual preparation

10 operators, since only durations of fixation of gaze direction exceeding a certain threshold value are analyzed, and durations of individual drifts are not taken into account, by which the frequency of flickes expressing the perceptual readiness of the operator can be found.

Claims (2)

The purpose of the invention is to improve the accuracy of estimating the perceptual readiness of an operator by determining the duration of individual drifts associated with the frequency of flicks. 390 The goal is achieved by the fact that in a device containing sensors connected to the amplifier amplifier inputs, the OR element, pulse counters and the display unit, there are series-connected amplitude pulse selector, T-flip-flop and pulse selectors of a given duration, the outputs of which are connected to the counter inputs pulses connected to the first input of the display unit, and the outputs of the last bits of each pulse counter through the OR element are connected to the second input of the display unit, and the amplitude input is The pulse collector is connected to the output of the amplifier maker, one of the inputs of which is connected to the output of the OR element. The drawing shows the structures on the electrical circuit of the device. The device contains sensors 1 connected to amplifier-shaper 2, the output of which is connected via an amplitude selector of pulses 3 to an input of a T-flip-flop, its output connected to the inputs of a selector 5 pulses of a given duration, the outputs of which are connected to the inputs of the corresponding counters 6 pulses whose outputs connected to the first input of the display unit 7, the last bits of the counters 6 through the element OR 8 connected to the second (control) input of the display unit 7. The device operates as follows. The frequency of scanning eye movements characterizes well the incompetence of cognitive processes and can serve as an indicator of the coherence of mental actions with the information field. The functional state of the brain systems, ensuring the perceptual readiness of the operator, can be determined by analyzing small eye surges (flickers). The distribution of the duration of individual drifts located between two adjacent flickes characterizes the frequency of occurrence of the latter. The average duration of the individual drifts when a fixed target is fixed in the normal state of the operator is 984 + 27ms. With various deviations from the norm, this value changes. 0 Preliminary, depending on the purpose of the device, the necessary number of zones is determined, corresponding to the possible average value of the duration of individual drifts. Allocation-continuity of individual drifts characteristic of each zone is carried out using pulse selectors of a given duration. Signals 1, which amplitude is proportional to the deviations of the operator’s eye block, are removed from sensor 1 and fed to amplifier driver 2. 15 From the output of amplifier 2, signals through an amplitude selector 3, the threshold of which is set through the inputs, are fed to the T-trigger 4 the output of which removes a signal proportional to the duration of the individual drifts, and only every second drift is fixed, which allows sampling over a longer observation time interval without increasing the number of counts 6. This signal arrives at all inputs of the selectors of 5 pulses of a given duration, but it will pass only through the one whose specified duration of transmitted pulses is equal to the duration of this signal. From the outputs of the pulse selectors, over the duration of 5, the signals enter the corresponding counters 6, where they accumulate. As soon as any of the counters 6 overflows, an overflow signal is removed from it, which is fed through the OR element 8 to the control input of the display unit 7 to the amplifier-driver 2, locking it. At the same time, the readings from all counters are taken and displayed on the display panel 7. Analyzing the distribution of the duration of individual drifts, judging the degree of perceptual readiness of the operator. The use of the present invention allows objective control of the degree of perceptual readiness of the operator in a short (up to 5 min) period of time, to optimize the distribution of functions between the operators in the group .. In addition. the use of the device in the selection process will facilitate the identification of persons with psychopathology, thereby increasing the effectiveness of the selection system. An apparatus for estimating an operator's state, comprising sensors connected to the inputs of an amplifier-maker, an OR pulse counters element and an indication unit, characterized in that, in order to improve the accuracy of an assessment of the operator's perceptual readiness by determining the duration of individual drifts, there are serially connected in it amplitude pulse selector, T-trigger and pulse selectors of a given duration, the outputs of which are connected to the inputs of pulse counters, 90 06 connected to the first input of the indication unit, and the last bits Yield kazhdopo pulse counter via the OR element connected to the second input of the indication unit, the input aiplitudnogo pulse selector coupled to an output amplifier -formirovatel one of whose inputs is connected to the output element ISH. Sources of information taken into account during the examination 1. USSR author's certificate ff, cl. A 61 B 5/16, 197. 2. USSR author's certificate Vf ZvZUE, cl. A 61 B 3/00, 1976 (prototype),.