| 摘要 |
FIELD: medicine. ^ SUBSTANCE: disclosed system relates medical information and measuring equipment and can be used in continuous single-channel supervision of several physiological parametres simultaneously, e.g. characterising cardiovascular and respiratory activity of an operator, including in dynamics, e.g. in tight requirements to the measuring equipment, particularly in first aid systems, remote advisory centres, aircraft-borne etc. The system contains transmitting and receiving modules. The transmitting module comprises the first and second sensors, first and second analogue-to-digital converters, a high-frequency generator, a transmitting antenna, a phase-shift modulator, a frequency-shift keyer, a power amplifier, an analogue message source and an amplitude modulator. The receiving module accommodates a radio receiver, modulation and registration units. The radio receiver contains a reference generator, a second phase detector, a control signal generator, a heterodyne, a mixer and an intermediate-frequency amplifier. A demodulation unit contains a phase doubler, the first, second and third phase lock units, the first, second and third phase halvers, a frequency demodulator, the first, third and fourth phase detectors, a limiting amplifier and a synchronous detector. ^ EFFECT: invention provides enhancement of the system by transmitting the analogue messages owing to amplitude modulation of high-frequency oscillation of one carrier frequency. ^ 3 dwg |
