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本文介绍了炸药爆轰产物导电性对电磁速度计记录的二种影响:(1)导电产物对敏感元件的旁路作用:(2)产物中环电流所产生的附加磁场的干扰作用。文中所提出的测量产物计和金属箔制成的敏感元件的零负载电流和动态电导的方法,以及测量附加磁场的安案,简单易行,并将有助于电磁法量测精度的提高。
In this paper, two kinds of effects of the detonation product conductivity of explosives on the records of electromagnetic speedometers are introduced: (1) The bypass effect of conductive products on the sensitive components: (2) The interference effect of the additional magnetic field generated by the ring current in the product. The measurement products proposed in this paper and the method of zero-load current and dynamic conductance of the sensor made of metal foil, as well as the measurement of the additional magnetic field, are simple and easy, and will help to improve the measurement accuracy of the electromagnetic method.