| 1. | Initial estimates in digital - image correlation method by a new displacement mode
非常应变模式数字相关方法的初值估计 |
| 2. | A study on the in - plane rotation measurement of a rigid object with the ultrasonic speckle correlation method
超声散斑数字相关法应用于刚体面内转动测量的研究 |
| 3. | The elastic modulus of a special alloy material are measured by the ultrasonic pulse - echo method , when the temperature is changed from - 20 ~ 60
为实现超声声速的快速、精确测量应用数字相关法精确确定超声信号的传播时间。 |
| 4. | The fpga and dsp architecture has been used in the digital correlator , by which the spread spectrum signal can be demodulated at the intermediate frequency
数字相关器采用fpga + dsp的结构设计,实现了扩频信号在中频的解扩解调。 |
| 5. | Eventually , the digital correlator of the modificatory structure is designed and realized by fpga , and it manifests very high and reliable correlative performance
最后用fpga芯片设计并硬件实现了修正结构的数字相关器，这种结构的数字相关器具有很好的工作性能。 |
| 6. | Digital correlation method was used to extract phase information as the phase information of eddy current testing signals could reflect the characteristics of detecting system
摘要涡流检测信号中的相位信息能反映检测系统的某些特性，讨论用数字相关法提取相位特征信息。 |
| 7. | Meanwhile , the influence of doppler effect on pn correlation is analyzed . the realization principle and structure of the digital correlator is analyzed , and then the realization form of the classical and modificatory structure of the correlator is introduced
详细分析了数字相关器的实现原理和实现结构，给出了经典结构和修正结构两种结构的实现形式，分别对两种结构进行了仿真分析，并对不同的实现形式进行了对比。 |
| 8. | This dissertation aims at weak signal detection technology in micro - mechanical gyros , and digital correlated demodulation which can improve signal detecting accuracy is simulated ; methods of compressing signal band width to improve signal - to - noise ratio and analyzing error production to decrease system error are researched
针对石英音叉微陀螺的微弱信号检测技术,本文通过仿真表明:利用数字相关解调方法提取陀螺信号可以很好地提高检测精度。 |
| 9. | Other than traditionally theory analyze and discussion of digital correlator which is laid after demodulator , a scheme based on non - interrelated correlative dll will be discussed in this paper after referencing the theory and the result of simulation . the demodulated data and the information of carrier are not need in this plan . we sample the result of correlation between local sequences and the received signal , then realizing the code synchronization by software
不同于一般的理论分析以及解调后数字相关器的讨论，本文通过理论分析与仿真结果，选用了非相干相关同步的基本结构，并加以改进，不需要解调和载波的信息，将本地序列与接受信号直接相关后进行采样，通过软件的方法，实现同步。 |
| 10. | Based on the principle of the ultrasonic cross - correlation flowmeter , the key factor of the development of cross - correlation flowmeter , namely the design of cross - correlator , is analyzed in the paper . digital signal processing is introduced to design the flowmeter , the cross - correlation operation of random noise signal is dealt with inside the frequency field , and the digital cross - correlator is designed
本文从超声相关流量计的工作原理出发，分析了超声相关流量计研制的关键因素，即相关器的设计，并将数字信号处理技术引入了超声相关流量计的设计，在频域内对流动随机噪声信号进行相关处理，构造了数字相关器。 |
