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    • 1. 发明专利
    • Ship speed measuring instrument
    • 船速测量仪器
    • JP2003004846A
    • 2003-01-08
    • JP2001183851
    • 2001-06-18
    • Japan Radio Co Ltd日本無線株式会社
    • SHINOHARA OSAMU
    • G01P3/26G01P5/00G01S15/60G01S19/53G01S5/14
    • PROBLEM TO BE SOLVED: To provide a ship speed measuring instrument capable of calculating an accurate ship speed by one ultrasonic beam even when pitching is generated in a ship. SOLUTION: A shaking sensor 28 such as a GPS posture measuring instrument or the like is provided to a ship 2 for transmitting and receiving ultrasonic beam B at a dip θ in a bow direction. When pitching is generated by inclination α, the ship speed V of the ship after correction can be calculated according to the formula; V=C.Δf/ 2f.cos(θ+α)} [wherein, (f) is the frequency of emitted ultrasonic waves, θ is a reference dip [the dip of a horizontal surface 4 with an emission direction (ultrasonic beam) at a time when there is no shaking], C is sonic velocity in water, and Δf is Doppler shift of reflected waves from the bottom of the water (difference between transmission frequency and reception frequency)].
    • 要解决的问题:提供一种能够通过一个超声波束计算准确的船舶速度的船舶速度测量仪器,即使在船舶产生俯仰时也是如此。 解决方案:将诸如GPS姿态测量仪器等的振动传感器28提供给用于在弓形方向上的倾角θ处发送和接收超声波束B的船舶2。 当通过倾角α产生俯仰时,修正后的船舶的船速V可以根据公式计算; V =C.Δf/ 2f.cos(θ+α)} [其中,(f)是发射超声波的频率,θ是基准倾角[水平面4与发射方向(超声波束) 在没有震动的情况下,C是水中的声速,Δf是来自水底的反射波的多普勒频移(传输频率和接收频率之差)]。
    • 6. 发明专利
    • JPH05297008A
    • 1993-11-12
    • JP14473192
    • 1992-04-20
    • HONDA MOTOR CO LTD
    • UNO TAKESHI
    • G01P3/26B81B1/00
    • PURPOSE:To enable temperature of a gas to be constant readily by providing a gas thermostated channel whose heating temperature is controlled to be constant by heating a channel wall with a heater at the upstream side of a nozzle. CONSTITUTION:A gas thermostated channel 4 for thermostating a gas which is discharged from a pump 3 is directly connected to the upstream side of a nozzle 2 for discharging a gas into a gas passage 1 where a pair of heat wires are installed. The channel wall is heated by a heater 5 and then the heater 5 is driven and controlled so that the detection temperature is always constant by a temperature sensor 6. In this configuration, by setting the channel 4 to a proper length, a gas which is discharged from the pump 3 is heated when it passes through the channel 4 and the temperature of the gas when it completed passing becomes nearly equal to that of a channel wall. Then, the gas which is always maintained to be a constant temperature is discharged from the nozzle 2 into the passage 1.