In this work offers modernization of an electrical part by Universal Physiotherapeutics1 device based on AtmeI Co. Atmega 103 microcontroller and advanced variant of its Control pand.N THIS ARTICLE considers upgraded variant of I electronical part by the multifunctional device for reflexotherapy which described in [I]. This device intends for complex inff uence to biological-active points with the following factors: electrical and magnetic fields, vibration, thermal and laser emissions. This set of 5 sorts of influence allows to reach an appreciable therapeftical effect when that device applicates in Medical establishments 121.ElectricaI part of the device consists of Power Supply unit, Handle Unit (HU), Primary Converters and Electrods unit which located in a Wand, and Control Panel (CP). HU represents printed circuit card contains Arithmetic-Logical Unit, Timer, ADC, generators of influences signals and amplifiers. There are buttons, regulators and indicators placed on CP.It is offered the fulfilment of HU with Microcontroller (MC) which includes ALU, RAM, programs ROM and data EEPROM and also specifying generator, Timer, 8-channels ADC and inpuboutput registers those connected to a common bus. The principal scheme of HU contains only interface devices namely amplifiers and transistor keys except for MC and DAC. Presence of a built-in serial data interface in MC allows to provide an IBM PC RS-232 port connection ability. It is required only 0++5V to +9+-9V power converter setup as a single chip. Resulting scheme is easily-upgrades that allows to add new influence factors to the device abilities. There is a connection with a biologyactive points determinition instrument ability also provided in that device.Also the new structure of CP had been offered. A defect of the dynamic indication which applicated in first scheme was removed. It was a low indicators emission because of little on-off time ratio of handle signals. In the new variant each indicator switched to one of serial united shift registers which provides unintempted segments' emission. Besides, the method of the soft regulation of parameters values had changed. In a frst variant that regulation had released with variable resistors wich COMeCtS to ADC, but the function of that scheme, at First, depends of resistors quality (linearity of resistance changing, range of regulator turning angle), at second, don't allows to set the current parameter value from MC or PC. It can removes these imperfection with a replacement of variable resistors to scroll wheels similarly sensors of ball moving registration which used in "Mouse" manipulators. That sensors function thus: mechanical moving transmits to rotates wheel with spokes (alternates gauzy and opaque areas), Erom one side of that places LED and from other side places two phototransistors. The consecution of its condition assigns the moving direction. These scroll wheels ensures unlimited motion (little changing step possible) and don't assigns a single meaning current regulator position.The possibility of c...
The research on the choice of scanning signal working frequency for skin surface sponginess estimation using ultrasonic vibrations has been made. The experimental setup has been designed. It is shown that the maximum change of the piezoplate voltage is at the resonance frequency for both cases: contact with air and contact with skin surface. The optimum scanning signal frequency for the considered radiator is 485 kHz.
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