摘要:
A high voltage DC power supplier includes: a transformer driven by a switching device, transforming an input voltage to a certain level of high voltage, and outputting the transformed high voltage; a diode and a capacitor for rectifying and smoothing the high voltage outputted from the transformer, and supplying the smoothed voltage to an ER fluid application unit; a discharge circuit for forcibly discharging the output voltage when an output voltage of the capacitor descends; and a controller for controlling a turn-on operation of the switching device on the basis of a difference value between the output voltage and a reference voltage so that the output voltage can follow a target voltage, and outputting a control signal for driving the discharge circuit to the discharge circuit when it reaches a discharge period.
摘要:
Various embodiments of the present invention relate to remote fire extinguishing equipment and remote crime prevention and extermination equipment, and the technical problem to solve is to provide remote fire extinguishing equipment and remote crime prevention and extermination equipment which remotely detect fire or trespassing so as to extinguish the region of the fire or eject a trespasser. To this end, disclosed are remote fire extinguishing equipment and remote crime prevention and extermination equipment, the remote fire extinguishing equipment comprising: a flame detecting sensor which detects a flame when a fire occurs and transmits a flame detection signal through a communication network; a smart phone which, when receiving the flame detection signal through the communication network, transmits, through the communication network, a photographing signal with respect to a fire occurring region; an IP camera unit which, when receiving the photographing signal from the smart phone, photographs the fire occurring region and transmits, through the communication network, a photographed image to the smart phone; and a smart plug which, when receiving, through the communication network, a user control signal of the smart phone, sprays a fire extinguishing material to the fire occurring region.
摘要:
The ER fluid comprising water-soluble starch as conductive particles contains less than 5 wt % water. The ER fluid of the present invention comprises water-soluble starch as a conductive particle which is dispersed in non-conductive media. The ER fluid of the present invention exhibits a considerable ER effect, even though the amount of water contained in the ER fluid is reduced. Thus, it can be widely applicable to water-sensitive damping devices and power devices such as a suspension system, a vibration damper or an engine mount, a break, a clutch, and so forth. And it is feasible for various fields such as an automatic and an aerospace industry.