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公开(公告)号：US4254485A
公开(公告)日：1981-03-03
申请号：US14532
申请日：1979-02-23
申请人： Sigeyuki Akita
发明人： Sigeyuki Akita
摘要： A temperature measuring apparatus includes a transmitter for continuously transmitting an ultrasonic wave into a propagation medium the temperature of which is to be measured. Two receivers are located along an ultrasonic wave propagation path spaced from each other by a predetermined distance. A phase difference between the ultrasonic waves received by the two receivers is detected as a pulse width which varies depending on a propagation velocity of the wave and hence a temperature of the propagation medium. An obstacle detecting and alarming circuit is provided to detect the presence of an obstacle between the transmitter and the receivers by detecting the absence of the phase difference signal.
摘要翻译： 温度测量装置包括用于将超声波连续地传输到要测量其温度的传播介质中的发射器。 两个接收器沿着彼此间隔开预定距离的超声波传播路径定位。 检测由两个接收器接收的超声波之间的相位差，作为根据波的传播速度和传播介质的温度而变化的脉冲宽度。 提供障碍物检测和报警电路，通过检测不存在相位差信号来检测发射机和接收机之间的障碍物的存在。
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公开(公告)号：US4201087A
公开(公告)日：1980-05-06
申请号：US924229
申请日：1978-07-13
申请人： Sigeyuki Akita , Hisato Wakamatsu
发明人： Sigeyuki Akita , Hisato Wakamatsu
CPC分类号： G01K11/24
摘要： An apparatus for measuring the temperature of a medium such as air or the like by the use of a change in the propagation speed of an ultrasonic sound wave depending on the temperature change of the medium. An acoustic transmitter transmits a carrier as an ultrasonic sound wave continuously through the medium to a receiver by exciting an ultrasonic wave vibrator with a series of pulses which constitute the carrier. The received ultrasonic wave when amplified exhibits a series of pulses having a constant signal level irrespective of a change in the amplification factor of the amplifier in the receiver.
摘要翻译： 通过使用根据介质的温度变化的超声波的传播速度的变化来测量诸如空气等的介质的温度的装置。 声发射器通过使用构成载体的一系列脉冲激发超声波振动器，将作为超声波的载波通过介质连续地发送到接收器。 当放大时所接收的超声波表现出一系列具有恒定信号电平的脉冲，而与接收机中放大器的放大系数的变化无关。
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