Time difference type flux gate sensor and time difference reading method

• Main Authors: PANG NA, CHENG DEFU, WANG YANZHANG
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2017
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a time difference type flux gate sensor and a time difference reading method. Periodic digital voltage signals are generated by an FPGA logic signal processor, the digital voltage signals are divided into two paths through a D/A conversion circuit, the two paths are transmitted through an outer magnetic field detection circuit I and a zero crossing detection circuit II to the FPGA logic signal processor, time difference between the excitation signal zero amplitude time and the induction signal pulse peak value time is utilized to measure a detected magnetic field, the induction signal pulse peak value time is positioned through utilizing a peak value detection circuit, and influence of induction signal amplitude change on the pulse peak value reading time can be avoided. Compared with a mode simply considering induction signal reading bidirectional saturation time difference in the prior art, the method is advantaged in that a problem that a change threshold value or increase of signa