| 摘要 |
FIELD: medicine; gastroenterology. ^ SUBSTANCE: to study motor function of alimentary canal the probe is introduced into organ to be checked. IR-radiation is excited to influence tested area of organ of alimentary canal. Intensity of reflected light flux is transformed into electric signal, which is subsequently amplified and registered and motor function of alimentary canal is judged from amplitude-time characteristics and from shape of electric signal. IR-radiation is excited in pulse mode; intensity of amplitude-modulated pulse reflected light flux is transformed into electric signal and then amplified by pulse voltage amplifier to be subsequently demodulated. To study motor function of alimentary canal the assembly is used which has probe made in form of transparent silicon tube. There is IR electronic couple inside tube, which couple has to be radiator and receiver separated by lightproof partition. Assembly also has matching amplifier, which has input connected with receiver, and registrar. Four IR electro-optic couples are disposed additionally inside transparent silicon tube; the four couples mentioned are connected with the first one.. Radiators of all electronic couples are connected with positive rectangular pulse oscillators; receivers of couples are connected with matching amplifier. Pulse voltage amplifier and demodulator are connected with amplifier in series. Demodulator is connected with registrar. ^ EFFECT: improved precision of results. ^ 2 cl, 3 dwg, 2 ex |
