METHOD AND DEVICE FOR TESTING GROUND ELEMENT
PURPOSE: To directly measure a resonant frequency and a Q value of a ground element without calibrating the same. CONSTITUTION: The frequency of a measuring signal supplied to a detection coil 2 is changed every constant time by a signal output part 1. A peak value of an induced voltage induced to a...
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| Main Authors | , , , |
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| Format | Patent |
| Language | English |
| Published |
12.04.1996
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| Edition | 6 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | PURPOSE: To directly measure a resonant frequency and a Q value of a ground element without calibrating the same. CONSTITUTION: The frequency of a measuring signal supplied to a detection coil 2 is changed every constant time by a signal output part 1. A peak value of an induced voltage induced to a ground element based on the measuring signal is detected by a measuring part 3. A resonant frequency f0 is stored. At the same time, the coincidence of an induced voltage value obtained by multiplying the peak value by 1/√2 with the resonant frequency is detected. A frequency Δf of a difference between the coincident points (f2 , f1 ) is obtained, so that a Q value is measured from a formula of f0 /Δf. |
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| AbstractList | PURPOSE: To directly measure a resonant frequency and a Q value of a ground element without calibrating the same. CONSTITUTION: The frequency of a measuring signal supplied to a detection coil 2 is changed every constant time by a signal output part 1. A peak value of an induced voltage induced to a ground element based on the measuring signal is detected by a measuring part 3. A resonant frequency f0 is stored. At the same time, the coincidence of an induced voltage value obtained by multiplying the peak value by 1/√2 with the resonant frequency is detected. A frequency Δf of a difference between the coincident points (f2 , f1 ) is obtained, so that a Q value is measured from a formula of f0 /Δf. |
| Author | AIKAWA OKIYASU YOSHINO FUMIO OKADA YASUHIKO YOSHIZAWA TOSHIHIKO |
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| RelatedCompanies | EAST JAPAN RAILWAY CO SANKOSHA:KK |
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| Snippet | PURPOSE: To directly measure a resonant frequency and a Q value of a ground element without calibrating the same. CONSTITUTION: The frequency of a measuring... |
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| SubjectTerms | ENSURING THE SAFETY OF RAILWAY TRAFFIC GUIDING RAILWAY TRAFFIC MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PERFORMING OPERATIONS PHYSICS RAILWAYS TESTING TRANSPORTING |
| Title | METHOD AND DEVICE FOR TESTING GROUND ELEMENT |
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