项目名称: 基于伪随机编码技术的冲击夯震源控制方法研究
项目编号: No.41304139
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 孙锋
作者单位: 吉林大学
项目金额: 25万元
中文摘要: 在山区复杂地表条件下,已有的可控震源设备由于自身结构、移动等特性,无法满足地震勘探的要求。冲击夯具有质量轻便于携带、能量转换效率高等优点,应用于复杂地表条件的地震勘探具有巨大潜力,控制冲击夯震源实现最佳的地震子波是其实际应用的瓶颈与难点。 本项目首先针对冲击夯进行深入研究,采用电路系统精密控制冲击夯的震动,然后提出采用伪随机编码方法实现冲击夯的精密振动控制,最终依据不同泊松比的地表条件,通过多种伪随机编码建立冲击夯震动数据库,实现伪随机编码控制的冲击夯震源。通过本课题的研究解决冲击夯单一震动频率对地震子波的相关干扰影响,保证冲击夯震源的能量按预期要求向地下传播,实现冲击夯震源的野外应用。 本项目将通过研究冲击夯自身震动特性及伪随机编码方法,为冲击夯震源的应用提供保障。
中文关键词: 冲击夯;可控震源;伪随机;编码;精密控制
英文摘要: Vibrator is used broadly in seismic exploration,but in some complex area or special area we couldn't use detonator and big vibrator equipment, so researching a vibrator for complex geological environment is in the face. Battering rammer has characteristic such as light mass、high output power、gas drived and so on, but as a result of single vibration frequency , the result of seismic wavelet is bad, how can we control the sweep process of the vibrator is the point . This item aim at exact improving for battering rammer, arrving at exactitude control by circuit system, we put forward an pseudorandom coding technique used for battering rammer, and getting an exactitude vibration control, by many pseudorandom code, we build vibration databank, this databank aim at different ground , we can get pseudorandom code and parameter from databank quickly .Object is solving the bad result of seismic wavelet caused by single vibration frequency , the battering rammer can transmit power to underground by expectant require, finally realizing the field application of battering ram vibrator. This item reserch on vibration characteristics of battering rammer and pseudorandom code theory , offering new theory for battering ram vibrator application.
英文关键词: Battering Rammer;Vibrator;Pseudorandom;Coding;Precision Control