Monitoring system on brake clearance of main shaft hoist in Hongyang No.2 Coal Mine based on laser detection technology

This paper introduces the technical transformation and system realization of the hoister gap monitoring and protection device in Hongyang No.2 Coal Mine.Through the high-precision laser decor displacement sensor, we detected displacement signals, such as brake clearance, brake wear value, spring fatigue and brake disc deflection, to convert into 4-

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Secondary cluster headache and numb chin syndrome as initial manifestation of high-grade B-lymphoma: a case report

Abstract Background Cluster headache is a primary condition characterized by severe headache accompanied by trigeminal autonomic signs.By definition, it is not attributed to underlying etiologies; however, under certain clinical characteristics, secondary etiologies must be ruled out.Case presentation We present the case of a 48-year-old Hispanic m

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