The invention discloses an ultrasonic wave-based
coal dust concentration dynamic detection
system and
coal dust concentration
dynamic monitoring method of mine. Sixteen ultrasonic sensors are fixed on the inner wall of an inner ring in a uniform angle manner, and every
ultrasonic sensor simultaneously has ultrasonic wave emitting and receiving functions; all
signal wires are commonly connected to a multi-
core plug on an outer ring, the multi-
core plug is connected with a programmed multipath
toggle switch through a shielded multi-core cable, the programmed multipath
toggle switch is respectively connected with a
voltage pulse generator and an ultrasonic
data acquisition device through wires, the
voltage pulse generator is connected with the ultrasonic
data acquisition device through a wire, and the ultrasonic
data acquisition device is connected with a
data processing center through a wire. An existing single-emitting and single-receiving detection mode is improved to a cycle single-emitting multi-receiving CT detection mode, and an ultrasonic
wave speed CT image and an absorption coefficient CT image are adopted to reflect the
coal dust concentration distribution, so the detection accuracy is improved.