The utility model provides a dozing detection alarm which comprises a brain wave data acquisition unit which comprises an electrode contacting the heads of detected people, a signal processing circuit, an alarm device and a digital signal processor which is respectively connected with the brain wave.....
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The present invention discloses a phase lead compensation network, power converters, and closed-loop control system, the phase lead compensation network is provided in the power converter closed-loop control system, the closed loop control system further comprises: power converter and control module.....
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An ultrasonic transducer driver has a giant magnetostrictive element, a fastener for holding the giant magnetostrictive element under mechanical pressure, a first field generator for providing a magnetic bias field, a second field generator for providing a magnetic drive field and a magnetic circuit.....
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