| 摘要 |
"EVENT LOCATION USING A MULTIWIRE SYSTEM" Method and apparatus for detecting and obtaining information about (particularly locating) an event, i.e. a change in a variable. Three conductors follow an elongate path. The first (called the locating member) has known impedance characteristics along its length. The second conductor (called the source member) has similar impedance characteristics. When the event occurs, connection is made between the locating member and the source member, thus creating a test circuit in which the only variable impedance is the impedance of the connection and in which a current of known size passes between the connection joint and the near end of the locating member. The voltage drop down this section of the locating member is measured and the location of the event can then be calculated. |
