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    • 2. 发明授权
    • System for measuring the transfer time of a sound-wave in a gas and
thereby calculating the temperature of the gas
    • 用于测量气体中的声波的传送时间并由此计算气体的温度的系统
    • US5437506A
    • 1995-08-01
    • US978709
    • 1993-02-05
    • Antonio Gray
    • Antonio Gray
    • G01K11/24
    • G01K11/24
    • A system for measuring the "time of flight" or transfer time of a sound wave in a gas by using the relation between the gas temperature and the velocity of the sound wave in the gas, and calculating therefrom the temperature of the gas. The system comprises an emitter, which generates a sound which is coherent in phase, at one frequency or a group of frequencies; a self-correlating decoder and a receiver, which is associated with the emitter, and which sends the sound to a filter system and to an assembly controlled by a microprocessor, which processes the signal coming out of the filter system in a shape similar to a Hamming wave shape in order to determine the absolute maximum value and therefrom determine the transfer time. With this knowledge, it is easy to relate the transfer time to the distance traveled between the emitter and receiver and the known properties of the gas, in order to arrive at the temperature of the gas through which the sound has been sent.
    • PCT No.PCT / EP92 / 01244 Sec。 371日期:1993年2月5日 102(e)日期1993年2月5日PCT提交1992年6月4日PCT公布。 出版物WO93 / 00577 日期:1993年1月7日。一种用于通过使用气体温度和气体中的声波的速度之间的关系来测量气体中的声波的“飞行时间”或传送时间的系统, 气体的温度。 该系统包括发射器,其以一个频率或一组频率产生相位相干的声音; 与相关联的解码器和接收器,其与发射器相关联,并且将声音发送到滤波器系统以及由微处理器控制的组件,该微处理器处理从滤波器系统出来的信号,其形状类似于 汉明波形为了确定绝对最大值,从而确定传输时间。 有了这个知识,很容易将传输时间与发射器和接收器之间的距离和气体的已知性质联系起来,以便达到发出声音的气体的温度。