SU790175A1 - Reflexometer - Google Patents

Description

The invention relates to medicine, can be used, in particular, as a device designed to study the temporal characteristics of human reactions, i.e. reflexometer for measuring the duration of verbal reactions. A reflexometer is known that measures the temporal characteristics of a verbal reaction by means of amplitude detection. The disadvantage of the reflexometer is the large error in measuring the duration of the verbal response, which depends on the amplitude of the verbal response and on the instability of the constant time of the detection circuit. The closest technical solution to the proposed is a device for measuring the duration of a verbal reaction, containing a sensor, an amplifier, a master oscillator, coincidence circuits, collection schemes, a syllable duration counter, a poise duration counter, a device for controlling automatically sequential activation synchronously with a syllable or a pause. In this device, the selection of the envelope is performed by discrete transformations of the verbal signal (reaction) .2 However, the device measures the duration of only a single verbal reaction and does not measure the duration of consecutive (chain) verbal reactions, because after the termination of the verbal reaction in the pause duration counter begins a time interval that can last indefinitely. The counting is stopped by the experimenter after each measurement by applying a reset pulse. In addition, the device has a low accuracy due to the polarity of the half-wave sound. signal at the beginning and end of the verbal response. If the polarity of the initial and final half-waves is opposite to that which triggers the Schmitt trigger, the measured duration is less than the real one.

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The purpose of the invention is to improve accuracy.

The goal is achieved by the fact that an inverter, two OR elements, a multivibrator of pauses, a multivibrator of a delay and a selector are entered into a reflexometer containing a series of a verbal response sensor and an amplifier, a Schmitt trigger and an electronic-to-meter meter, and an amplifier output connected to the first input of the first OR element and to the inverter, the output of which is connected to the second input of the first OR element, whose code through the Schmitt trigger is connected to the input of the pause multivibrator, the output of which is for prison to the first input of the second. the OR element, the second input of which is connected to the Schmitt trigger code, and the output from one of the selector inputs and to the input of the delay multivibrator, the output of which is connected to another input of the selector, the output of which is connected to the input of the electronic time meter.

FIG. 1 shows the functional scheme of the reflexometer; in fig. 2 is a timing diagram explaining his work,

Reflexometer contains sensor 1 verbal. . reaction (microphone), amplifier 2, inverter 3, first element 4 OR, Schmitt trigger 5, multivibrator 6 pauses second element 7, multivibrator 8 for holding, selector 9, electronic count meter 1O time intervals,

Reflexometer works as follows.

The acoustic signal of the verbal reaction is converted into the electric sensor 1. After amplification in amplifier 2 (Fig. 2a), the verbal response signal is fed to the input of the inverter 3 and the first input of the first OR element 4.

Inverter 3 and the first element 4 OR transforms the verbal response signal,

incorporating pulses of different polarity, into a signal consisting of pulses of one polarity (figv), as a result of this conversion, an electrical signal corresponding to the beginning of the first sound and the end of the last sound, regardless of the field Jf, trigger the 5 Schmitt trigger {figg). The voltage drops occurring at the output of the trigger 5 are fed to the input of the multivibrator 6 pauses and the second input of the second element 7 OR.

The 6 pause multivibrator is assembled according to the standby multivibrator circuit, in which

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There is a forced return of the original state with an external pulse.

The constant time of the multivibrator, az 6, is set longer than the length of the pause between syllables and individual verbal reaction woks.

The pause 6 multivibrator is triggered by the falling edges of the Schmitt trigger 5 output pulses, and the leading edges of the Schmitt trigger 5 pulses are reset to the initial state. Thus, the voltage drop corresponding to the end of the first sound (syllable) of the verbal response starts the multivibrator 6 pauses, and the voltage drop corresponding to the beginning of the next sound (syllable), returns the multivibrator 6 pauses to its original state (Fig. 2e).

After the end of the last sound of a word, a multivibrator of 6 pauses produces a pulse for them, the duration of which is determined by the established constant time t of the multivibrator of 6 pauses.

A series of pulses from the output of the multivibrator 6 pauses is fed to the input of the second element 7 OR. The pulse at the output of element 7 OR exceeds the duration of the verbal response to the value of the time constant of the multivibrator 6. pauses (Fig. 2e). The leading edge of this pulse triggers the multivibrator 8 delay.

Multivibrator 8 delay is assembled according to the standby multivibrator scheme with a constant time equal to the constant time of the multivibrator 6 pauses t, the pulse from the output of the multivibrator 8 delay arrives at one of the inputs of the selector 9, and the other input of the selector 9 receives a signal from the output of element 7 OR .

The selector 9 is a match element with signal inversion. The selector 9 forms at the output a pulse, equal to the duration of the time interval from the appearance to the termination of the sound of the word (reaction) (Fig. 2h).

The duration of the output pulse of the selector 9 is measured. electronic meter 10 time intervals.

Thus, when using the inverter 3 and element 4 OR, the error caused by the polarity of the initial and final half-wave verbal response is eliminated, and the inclusion of multivibrators, the OR element and the selector 9 provides with high accuracy the measurement of the duration of consecutive verbal responses, while the known device posture

Claims (1)

Claim A reflexometer containing a series of verbal reaction sensors 15 and an amplifier, a Schmitt trigger, an electronic counter for measuring time intervals, characterized in that, in order to increase accuracy, an inverter, two OR elements, a multivibrator - ₂ θ pause torus, a delay multivibrator and a selector are inserted into it moreover, the output of the amplifier is connected to the first input of the first OR element with an inverter, the output of which is connected to the second input of the first element OR whose output is connected through the Schmitt trigger to the input of the pause multivibrator, for which it is connected to the first input of the second OR element, the second input of which is connected to the Schmitt trigger output, and the output to one of the selector outputs and to the input of the delay multivibrator,. the output of which is connected to another input of the selector, the output of which is connected to the input of the electron-meter measuring time intervals.