59 results about "Long term stress" patented technology

A stress-measuring device (10) and method determines a level (15) of stress of a user (1), in particular long-term stress. The stress-measuring device (10) includes an input interface (12) for receiving a skin conductance signal (11) indicating the skin conductance of the user (1), the skin conductance signal (11) over time forming skin conductance trace data (13). The stress-measuring device (10) further includes a processing unit (14) for processing the skin conductance trace data (13). The processing unit (14) determines, over at least a portion of the skin conductance trace data (13), values of a rise time (tr) between at least two different points of the skin conductance trace data (13), a frequency distribution of the rise time (tr) values, and the level (15) of stress of the user (1) based on the determined frequency distribution.

The invention relates to a detection system and method, belonging to the field of stress monitoring of coal mine working faces, in particular to a real-time detection system and method of coal mine working faces based on a belt conveyor. The system and method use the belt conveyor installed in the Yunshun Lane of the working face as the source of vibration, and the seismometers are arranged in the Yunshun Lane and the return air lane on the other side of the working face, and the signal is obtained by recording the vibration for a certain period of time. For the seismic shot set with high noise ratio, the velocity distribution CT of the working face is obtained through tomographic processing, and the CT of the working face of each time period is connected to form a "cloud image" that changes with time, and the abnormal area of ​​stress adjustment can be found. Send an early warning signal. Therefore, the system and method can realize long-term real-time stress scanning of the whole working face.

The invention relates to a standing and lying type wheelchair with a turnover function. A foot supporting mechanism is rotationally connected with a cushion frame and a wheelchair frame; the cushion frame is placed on the wheelchair frame through rollers; a turnover mechanism is arranged on the cushion frame; the cushion frame is rotationally connected with a left backrest frame and a right backrest frame; a running mechanism, the turnover mechanism, a standing mechanism and a lying mechanism are connected with a control structure respectively, so that turnover, standing, lying and universal running control are achieved. A lying function is achieved through the cooperation of two motors of a back raising mechanism and the foot supporting mechanism, and a single back raising function can be achieved by individually operating one motor; moreover, anti-tilting wheels are mounted behind rear driving wheels, and front anti-tilting wheels are additionally arranged at the lower part of a foot supporting frame in front of small universal wheels, so that the functionality and the safety of the wheelchair are improved. The turnover function is combined to the standing and lying type wheelchair, an automatic timing turnover function is achieved by the simultaneous overturning of a single backrest and a cushion, the long-term stress on the hip and the back of a bedridden patient is relieved in an assisting way, the occurrence probability of bedsore is reduced, and the burden on a nurse is reduced.

A high-strength steel sheet is provided which, even when subjected to long-term stress-relief annealing after welding, decreases little in strength and which has satisfactory low-temperature HAZ toughness. The high-strength steel sheet has a chemical composition adequately regulated and has a CP value defined by the following equation (1) of 5.40% or higher and a carbon equivalent (Ceq) defined by the following equation (2) of 0.45% or lower. CP value = 125[Ti]+111[Nb]+60[V]+15[Mo] (1) ([Ti], [Nb], [V], and [Mo] indicate the contents (mass%) of Ti, Nb, V, and Mo, respectively.) Ceq=[C]+[Mn] / 6+([Cr]+[Mo]+[V]) / 5+([Cu]+[Ni]) / 15 (2) ([C], [Mn], [Cr], [Mo], [V], [Cu], and [Ni] indicate the contents (mass%) of C, Mn, Cr, Mo, V, Cu, and Ni, respectively).