| 摘要 |
FIELD: medicine.SUBSTANCE: group of inventions refers to medicine and can be used for the capacity measurement of patient's motion which comprises time-varying static charges. A system comprises a probe and an electret or a combination of an electrically conductive element and a voltage generator configured to feed a time-constant static charge. The electret or electrically conductive element can be mechanically or electrically connected to the patient in such a way they mechanically move with the patient and are subject to the time-varying static charge. The probe is spaced from the electret or the combination of the electrically conductive element and voltage generator and is found in a contact-free capacitive joint with them so that the relative mechanical action between the probe and electret or conductive element causes changes in an output measuring signal of the probe. The time-constant static charge decreases the output measuring signal distortions caused by the time-varying static charge. The element comprising the time-constant static charge is attached to the patient's measuring point in such a way the element comprises the time-varying static charges. The measuring signal is formed by the capacity measurement of the patient's mechanical motion with the use of the probe, which is spaced from the element, measuring point and object so that the probe can take contact-free measurements of the mechanical motions of the object.EFFECT: using the inventions enables increasing the patient's capacity measurement accuracy.20 cl, 5 dwg |
