| 摘要 |
PURPOSE:To make it possible to correct the mismatching of a pick-up coil without using a movable part, to enhance strength to acceleration and to enable measurement during movement, by adding orthogonal triple-axis magnetometer to a fixed type uniaxial magnetic field gradient measuring part consisting of the pick-up coil and a SQUID magnetometer. CONSTITUTION:A magnetic field gradient measuring pick-up coil 1 is connected to the input terminal of a SQUID magnetometer 2 while the pick-up coil 4 of an orthogonal triple-axis magnetometer is provided to the same place (in the same magnetic field) of the pick-up coil 1 and connected to the input terminals of three SQUID magnetometers 5 at every axis. As one example, one axis component in the pick-up coil 4 of the orthogonal triple-axis magnetometer is wound so as to come to the normal same to that of the magnetic field gradient measuring pick-up coil 1. The outputs of the SQUID magnetometers 2, 5 are inputted to an operator 6. As mentioned above, a high sensitivity magnetic field measuring apparatus can be constituted of only a fixed part and the apparatus becomes tough. |
