Electromagnetic noise measurement apparatus

An electromagnetic noise detecting apparatus for measuring an electromagnetic noise in a vicinity of an integral structure base, comprising:

• an integral structural base made up of a plurality of first substrates having a first electromagnetic sensor formed on a surface thereof, and second substrate having second electromagnetic noise sensors formed thereon mutually intersecting a front surface and a rear surface at a predetermined interval separation in an X-axis direction, wherein the first substrate orthogonally intersects and is formed integrally with the second substrate so that the first electromagnetic noise sensor orthogonally intersects the second electromagnetic noise sensor at a position proximate to the second electromagnetic noise sensor;
• driving means for moving the unitary structural body a predetermined distance in a direction of the first substrate;
• memory means for storing a second induced voltage value output from the second electromagnetic noise sensors at a position immediately preceding movement by said driving means, storing a second induced voltage value output from the second electromagnetic noise sensors when the integral structural base is moved only for a predetermined distance in a direction of the first substrate, and further interconnecting in parallel the first electromagnetic noise sensors and the second electromagnetic noise sensor, which are at a mutually proximate position at the position of movement, and storing a third induced voltage value output from the parallel connected electromagnetic noise sensors;
• computational means for determining an electromagnetic noise level based on the first induced voltage value and the second induced voltage value at the mutual proximate position stored in the memory means, and determining a direction of the electromagnetic noise source based on both a comparison of the first and second induced voltage values at the mutual proximate position stored in the memory means and whether the largest induced voltage among said first induced voltage value and the second induced voltage value at said mutual proximate position is larger than the third induced voltage value output from the parallel connected electromagnetic noise sensor formed by parallel connecting the mutually proximately positioned first electromagnetic noise sensor and second electromagnetic noise sensor;
• and
• display means for displaying the electromagnetic noise level and the direction of the electromagnetic noise generating source, determined by the computation means, at a position corresponding to the position of each first electromagnetic noise sensor formed on the first substrate which was driven by the driving means.

An electromagnetic noise measuring apparatus, comprising:

• a base substrate having disposed upright on a surface thereof a first electromagnetic noise sensor row made up from electromagnetic noise sensors disposed so that an enclosed angle of the electromagnetic noise sensors, which are disposed mutually adjacent and separated a fixed interval in the X-axis direction, is substantially 90°, and a second electromagnetic noise sensor row made up of electromagnetic noise sensors disposed separated a fixed interval in the Y-axis direction and confronting with respect to the first electromagnetic noise sensor row, and further being arranged in the X-axis direction so that an angle is substantially 90° with the angle at which the first electromagnetic noise sensor row are arranged, and further being disposed separated a fixed interval confronting a planar body on which a concerned electromagnetic noise measuring body under test is placed;
• switch means for successively and selectively outputting induced voltages output from each of the first and second electromagnetic noise sensor rows;
• drive means for driving the base substrate a distance at least in the Y-axis direction based on a distance corresponding to a Y-direction interval of the first electromagnetic sensor row and the second electromagnetic sensor row;
• calculating means for determining an electromagnetic noise level and a direction of an electromagnetic noise source, based on induced voltages output from mutually facing electromagnetic noise sensors in a Y-axis direction of said first and second electromagnetic noise sensor rows, in accordance with an induced voltage output from the second electromagnetic noise sensor row at a time of driving at a position before said driving by the drive means until a position of the first electromagnetic noise sensor row, and an induced voltage output from the first electromagnetic noise sensor row before said driving;
• display means for displaying the electromagnetic noise level and the direction of the electromagnetic noise generating source determined by said calculating means, at a display position corresponding to a position of the second electromagnetic noise sensor row, at a time of calculation of the electromagnetic noise level and direction of movement of the electromagnetic noise generating source.