Profession, pilot, astronaut, test pilot, flight and space technology. require absolute health and exceptional emotional stability. To determine the degree of emotional stability of each person is possible by means of an instrument called emozionato. Such a device is designed and manufactured in the Club of young technicians of Novosibirsk Akademgorodok.
THE PRINCIPLE OF THE DEVICE
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 mental stress causes sweat glands to work harder, which ultimately leads to the decrease of the resistance of human skin.
Our device detects changes in the resistance of the skin. For contact with the human body using special electrodes. Them to strengthen those areas of skin that contain the maximum number of sweat glands. Convenient is, for example, the hand: one electrode is applied to the palm, the other to the back thereof (Fig. 1).
Fig. 1. So measure the level of emotion of a person
DIAGRAM OF THE DEVICE
By connecting wires to the electrodes connected to terminals V1, C2 of the device (Fig. 2). Potentiometer R1 sets the current in the external circuit (through the hand of man). The current magnitude in the range of 20-50 μa is controlled by a galvanometer IP. Registration of change of current associated with emotional arousal, is performed by a microammeter IP2 included in a bridge circuit. After fixing the electrodes on the hand, using the variable resistor R5 arrow IP2 is set to 0.
Fig.2
Switch B1 choose the sensitivity of the device. When B1 is closed, the resistor R4 is short-circuited, and the greatest sensitivity of the device. In the open position of the switch it is reduced in 5 times.
The terminals CLS, CL connect the data logger, which captures the human reaction time to stimuli: light, sound, etc.
DETAILS AND DESIGN
The instrument microammeter: IP-M494 100 µa, IP2 - M592 50 μa with a zero in the middle of the scale, or any other current full deflection of 100 μa. The transistor T1 MP39-MP42. It is advisable to return the collector current does not exceed 5 mA.
Powered circuit of two series-connected batteries 3336L. Structurally the device in a metal enclosure the size of HH mm.
Electrodes with a diameter of 10-20 mm and a thickness of 2-5 mm made of zinc, silver or silver-plated foil and amalgamut: cover with a paste of kaolin, zameshannogo on a saturated solution of sulphate of zinc. Kaolin can be purchased at the pharmacy, and zinc sulfate are in every school a chemical Cabinet. Then the electrodes are wrapped clean gauze soaked in so-called physiological solution. To make it simple: in a glass of water stir a tablespoon of ordinary cooking salt. Both electrodes tied to his hand with a bandage. You can now proceed to the experiments.
THE EXPERIMENT
The subject is in a darkened room in a comfortable lying or sitting position. After one or two seconds after the onset of the stimulus the meter pointer is shifted by a certain value, registering the reaction of the subject on a sound, light or touch to the body. If a person has a good emotional stability, deflection will be negligible.
Author: A. Terek, Novosibirsk; Publication: N. Bolshakov, rf.atnn.ru