Emotion meter. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Electronics in medicine
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Professions, pilot, cosmonaut, tester of flight space technology. require absolute health and exceptional emotional stability from a person. To determine the degree of emotional stability of each person, you can use a device called emotsiometron. A similar device was developed and manufactured in the Club of Young Technicians of the Novosibirsk Akademgorodok.
OPERATING PRINCIPLE
It is known that the resistance of certain parts of the human body depends on the activity of the sweat glands. It is controlled by the nervous system. Any emotional arousal or neuropsychic stress causes the sweat glands to work more intensively, which ultimately leads to a decrease in the resistance of the human skin.
Our device registers changes in skin resistance. Special electrodes are used for contact with the human body. They are strengthened on those areas of the skin that contain the maximum amount of sweat glands. For example, the hand is convenient: one electrode is applied to the palm, the other to its back (Fig. 1).
Rice. 1. This is how the degree of emotionality of a person is measured
INSTRUMENT DIAGRAM
By means of connecting wires, the electrodes are connected to the terminals CL1, CL2 of the device (Fig. 2). Potentiometer R1 sets the current in the external circuit (through the human hand). The current value in the range of 20-50 μA is controlled by the IP1 pointer device. Registration of current changes associated with emotional arousal is carried out by an IP2 microammeter connected in a bridge circuit. Having fixed the electrodes on the hand, using a variable resistor R5, the IP2 arrow is set to 0.
Ris.2
Switch B1 select the sensitivity of the device. When B1 is closed, resistor R4 is short-circuited and the sensitivity of the device is at its highest. In the open position of the switch, it decreases by 5 times.
A recorder is connected to the terminals KLZ, KL4, which records the time of a person's reaction to a stimulus: light, sound, etc.
DETAILS AND CONSTRUCTION
The device uses microammeters: IP1-M494 for 100 μA, IP2-M592 for 50 μA with zero in the middle of the scale or any other with a full deflection current of the needle of 100 μA. Transistor T1 MP39-MP42. It is desirable that the collector reverse current does not exceed 5 μA.
The circuit is powered by two 3336L batteries connected in series. Structurally, the device is made in a metal case measuring 80X120X250 mm.
Electrodes with a diameter of 10-20 mm, a thickness of 2-5 mm are made of zinc, silver or silver-plated foil and amalgamated: covered with a paste of kaolin mixed with a saturated solution of zinc sulfate. Kaolin can be purchased at a pharmacy, and zinc sulfate is in every school chemistry room. The electrodes are then wrapped in clean gauze soaked in what is known as saline. It is not difficult to make it: a tablespoon of ordinary edible salt is stirred in a glass of water. Both electrodes are tied to the arm with a bandage. Now you can start experimenting.
CARRYING OUT THE EXPERIMENT
The subject is in a darkened room in a comfortable lying or sitting position. One or two seconds after the appearance of the stimulus, the arrow of the device moves by a certain amount, registering the reaction of the subject to sound, light, or touch to the body. If a person has good emotional stability, the arrow deviations will be insignificant.
Author: A. Terskikh, Novosibirsk; Publication: N. Bolshakov, rf.atnn.ru
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