cet6成绩查询>人造士兵
专利名称：SOUND IMAGING APPARATUS 发明人：KOJIMA HIROSHI
申请号：JP6309886
guarantee是什么意思申请日：19860320
公开号：JPS62218885A
可笑的英文
hospitalized>install是什么意思公开日：
上海市延安中学
教育学考研真题19870926
工厂英文
怎样提高高中语文专利内容由知识产权出版社提供
摘要：PURPOSE:To perform the three-dimensional detection on a matter by one transmission, by transmitting a transmitting signal of variable frequency by a two-system transmitting element and analyzing frequency in a receiving side to detect a pha. CONSTITUTION:Tone burst changing in this frequency with the elap of time is generated in the transmitting control part 11 of a transmitter 1 and an acoustic signal is delayed by the time corresponding to a specific pha with respect to the time and each frequency component corresponding to the specific pha to center frequency by respective delay circuits 12, 13 to be transmitted into water from two system transmitting elements 21, 22 of a transmitter 2 spaced apart from each other by a definite distance and sweeping is performed between azimuth angles in a predetermined range. The reflected wave from matter is received by the respective receiving elements 31, 32 of a receiver 3 and the receiving signal passing through an A/D converter 5 is analyzed by a frequency analyr 6 to supply the analytical result to a pha detector 7 as a transmitting azimuth signal. Whereupon, the detector 7 compares the phas of both receiving signals at every specific frequency spectrum to calculate a receiving azimuth to display the same on a display device 9. By this method, three-dimensional information is obtained by transmitting and receiving waves of one time to be displayed
within a short time.
申请人：NEC CORP
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