https://community.element14.com/technologies/wireless/w/documents/7496/pageen-USTelligent Community 12https://community.element14.com/technologies/wireless/w/documents/7496/pageThu, 07 Oct 2021 07:35:42 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:60a1b16a-4306-473c-82da-19b2f73c08c0sophie0lovehttps://community.element14.com/technologies/wireless/w/documents/7496/page#commentsCurrent Revision posted to Documents by sophie0love on 10/7/2021 7:35:42 AM<br /> <p style="margin:0;">建立螺杆钻具本体的有限元模型,采用有限元法模拟计算声纵波在螺杆钻具中的传输特性,同时在实际钻具上对模拟结果进行试验验证,并选择4 kHz频率的声波在螺杆钻具上进行通信试验.结果表明:螺杆钻具及其上部钻具具有较宽的通信频带,类似于一个低通滤波器,可以利用声波实现近钻头信息的短距离传输,并可能获得较高的数据传输速率;80 bits/s的数据传输速率可实现稳定通信;钻具接头处的尺寸和介质变化所引起的衰减和反射不可忽视,须通过增加隔声或消声结构减少干扰. </p> <div class="migration-injected-attachments"><div style="font-weight:bold;margin:15px 0 5px 0;">Attachments:</div><div></div><table style="border:0;"><tbody><tr><td width="160"><span class="_se_attachment" id="attid_https://www.element14.com/community/api/core/v3/attachments/20040"><a href="https://community.element14.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-05/_D18FBB943459ED77DD8DBB79F058E26C1A90E14F_.pdf">community.element14.com/.../_D18FBB943459ED77DD8DBB79F058E26C1A90E14F_.pdf</a></span></td><td><span style="font-size:80%;">近钻头短距离声波通信.pdf</span></td></tr></tbody></table></div><div style="clear:both;"></div>