| 摘要 |
FIELD: devices for detecting electric field intensities initiated by stresses in material. SUBSTANCE: method involves providing detector having two different elements made from current-conductive materials, with first element covering substantial area; positioning first element adjacent to object to be measured; positioning second element, having smaller sizes compared to first element, within cavity of body to be measured in electrically insulated relation with respect to second element inner wall. First element having larger area serves as reference electrode, i.e., variations in potential of smaller electrode of detector are amplified and recorded in comparison with potential of first electrode. Further increase in sensitivity is reached by using stress electronic circuit in cavity of body to be measured. Method and measuring apparatus may be used for detecting geoelectric field and forecasting or evaluating activity of volcano or earthquake. EFFECT: increased efficiency, wider operational capabilities and enhanced reliability in operation. |
