Abstract: The present invention provides an animal repelling device, which comprises a connecting rod, a sound wave generator, a power supply system and an insertion end, wherein a center line X is defined along the insertion direction of the insertion end, and a tab group is arranged on the surface of the insertion end, wherein the tab group is composed of mutually parallel tabs extending outward from the surface of the insertion end, and the extension direction defines an extension line Y, which forms an included angle with the center line X of the insertion end, and the tabs are distributed around the surface of the insertion end. The animal repelling device can effectively repel rodents such as mice and snakes by generating longitudinal waves to simulate seismic waves.

Abstract: Disclosed is a method fir measuring a deviation angle of a fatigue microcrack based on nonlinear ultrasound, comprising: preliminarily positioning a fatigue microcrack to obtain a center of the microcrack; selecting a horizontal positive direction, and defining an orientation angle; drawing a positive circumference on a surface of a metal plate, and selecting a fixed interval angle; placing an excitation sensor and a receiving sensor on the drawn positive circumference according to the orientation angle; ultrasonically testing each group of ultrasonic sensing paths, and recording time domain waveform signals formed by each group of ultrasonic sensing paths; converting each group of time domain waveform signals into a corresponding frequency domain graph, extracting an ultrasonic fundamental wave signal amplitude and a second harmonic waveform amplitude, and calculating a relative nonlinear coefficient; drawing an orientation angle-relative nonlinear coefficient polar coordinate graph; and determining a deviat

Abstract: A metal pole plate sealing structure for a fuel cell is disclosed, as well as a fuel cell using this structure. The metal pole plate sealing structure for a fuel cell includes a metal pole plate, a membrane electrode assembly and a sealing rubber body. The metal pole plate has a sealing rubber groove. The sealing rubber body is accommodated in the sealing rubber groove. The sealing rubber groove, the sealing rubber body and a frame of the membrane electrode assembly cooperate with each other to seal an internal space enclosed when the metal pole plate and the membrane electrode assembly are pressed together. An inner surface of the sealing rubber groove has a positioning unit which makes it easier to fix an installation position of the sealing rubber body in the sealing rubber groove.

Abstract: The present disclosure relates to the field of fuel cells. The present disclosure relates to a fuel cell component, comprising a plate body, with the following provided on the plate body: an anode gas flow path leading from an anode inlet to an anode outlet; a cathode gas flow path leading from a cathode inlet to a cathode outlet; and a coolant flow path leading from a coolant inlet to a coolant outlet, the coolant flow path being configured such that coolant is partially diverted from the coolant inlet to a designated region of the plate body and mixes with an undiverted portion in the designated region, in order to enhance cooling capacity in the designated region by means of the mixed coolant. The present disclosure also relates to a fuel cell system and a heat management method for the fuel cell component.

Abstract: The present invention discloses a functional electrical stimulation system comprising a primary power, a boost module, an energy storage section, an output control relay, an automatic discharge circuit, a foot/hand controlled switch, a current detection chip and a current limiting fuse. The boost module comprises n DC chopper circuits connected in series, and outputs a high voltage of 100-200V. According to an enable signal and a current detection signal, the output control relay disables/enables the DC boost module. The automatic discharge circuit discharges capacitance of the energy storage section automatically when the relay turns off the power input. The Foot/hand controlled switch, the current detection chip and the current limiting fuse form a triple accident protection circuit. The functional electrical stimulation system maximizes the intensity of electrical stimulation within the range that the human body can withstand.

Abstract: The present invention discloses a functional electrical stimulation system comprising a primary power, a boost module, an energy storage section, an output control relay, an automatic discharge circuit, a foot/hand controlled switch, a current detection chip and a current limiting fuse. The boost module comprises n DC chopper circuits connected in series, and outputs a high voltage of 100-200V. According to an enable signal and a current detection signal, the output control relay disables/enables the DC boost module. The automatic discharge circuit discharges capacitance of the energy storage section automatically when the relay turns off the power input. The Foot/hand controlled switch, the current detection chip and the current limiting fuse form a triple accident protection circuit. The functional electrical stimulation system maximizes the intensity of electrical stimulation within the range that the human body can withstand.