PURPOSE: To identify the composition of a sample metal piece by removing components attributable to errors in the outer diameter dimensions thereof, deviation in the setting position and the like.
CONSTITUTION: A sample piece is set on one of sensors 1 and 1' each equipped with a drive coil and a detection coil and a reference piece on the other thereof. The drive coils are driven with an AC source 3 and outputs of the detection coils are applied to a detector 7 through a differential amplifier 4. Then, the detector 7 fetches a signal at the phase position designated by two reference phase signals formed with a phase signal generator 6 from a differential signal from the amplifier 4. On receiving the signal, a phase shifter 9 re-evaluate it on the coordinate rotated in the shift according to the preset value of a phase setting device 10. This removes components attributable to errors in the outer diameter dimensions of the sample piece, deviation in the setting position and the like thereby enabling identification in the composition of a sample metal piece.
WAKIMOTO MASAAKI
HORIBE HISAO
WADA YOUJI
EDDIO CORP
| JPS52116290A | 1977-09-29 |
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