The present application relates to the field of
internet of things sensor, specifically to a self-checking
smoke sensing device. It comprises a
junction box, a mounting box and a self-checking
assembly; the
junction box is internally provided with an
internet communication module; the mounting box is arranged at the bottom of the
junction box, the top end of the mounting box is internally provided with a detection probe capable of detecting
smoke and
alkane-containing gas mist, and multiple through holes are uniformly distributed around and at the bottom of the mounting box; the self-checking
assembly comprises a fixing clamp and a
peristaltic pump arranged in the mounting box, a tank arranged on the fixing clamp, a suction
pipe communicated between the tank and the
peristaltic pump, a pumping
pipe communicated at the output end of the
peristaltic pump and a spray head communicated at the outer end of the pumping
pipe; during self-checking, the spray head sprays
alkane-containing gas mist. The present application can detect the
smoke generated by frictional slipping when the conveying belt and the roller slip, trigger an alarm, so as to timely
shut down and maintain the
belt conveyor, improve safety, and can self-check the detection probe to ensure that the detection probe has normal detection function.