| 1. | Beat frequency electrotherapy unit
差频电疗机
|
| 2. | Bfo beat frequency oscillator
差频振荡器
|
| 3. | Beat frequency oscillator
差频振荡器
|
| 4. | Beat frequency indication
差频指示
|
| 5. | Effect of beat frequency on the measured phase of laser - diode heterodyne interferometry
斜波调频合成外差干涉相位检测非线性分析
|
| 6. | Rotation speed of last and travel speed if vibrating - roller are adjustable as required . the beating frequency of vibrating - roller can be adjusted
鞋楦的旋转速度与震荡滚轮的前进速度，可配合平整之需求加以调整。
|
| 7. | Such tags could emit 128 different signals in parallel , allowing the collection of data about an animal ' s breathing rate , wing - beat frequency and heartbeat ( if it were a species that actually has a beating heart ) in addition to its geographical location
佩带器还可以发射128种不同的信号，这样除了动物地理位置之外，还可以收集其它分门别类的数据，诸如动物的呼吸、翼摆、心跳频率（针对有心跳频率的动物）等等。
|
| 8. | The methods of direct measurement with low precision such as frequency and time interval methods and the methods of indirect measurement with high precision such as beat frequency method , dual mixer time difference method and frequency difference multiplying method are supported on the platform . the fundamentals of each method are studied . the quantization error is analysed and the illustration is given for each method
该平台支持直接频率和时差法两种较低精度的测量方法以及双混频时差法、差拍频率法和频差倍增法高精度的简接测量方法，本文研究了各种测量方法的原理，对各种测量方法的量化误差作了分析，并给出具体的实例。
|
| 9. | By using the processing method of sliding time window , the problem of the periodicity range ambiguity is solved . meanwhile , the problem of range ambiguity which is produced because the range of target is biger than the maximum range of radar is also solved by using this method . then , the pulse width parameter which is the most important in the parameters of fmicw is analyzed . the stricter restrict is given to ensure the range spectrum has only one beat frequency after signal processing . at last this thesis introduces the different signal processing methods of fmpcw and fmicw
同时利用该方法解决了fmpcw信号的由于目标距离超过雷达的最大单值测距范围而引起的距离模糊问题。然后对fmicw波形参数中最为重要的脉冲宽度进行了分析,给出了更为严格的约束条件,保证了信号处理后距离谱峰值的唯一性。最后,分别介绍了fmpcw和fmicw信号的不同处理方式,并对两者不同的时域滤波性能进行了比较,并对二者的差异进行了分析。
|
| 10. | Based on the analysis of the beat frequency signal , the expression of the beat frequency phase is deduced . the expression indicates physics meanings of quantities to be detected and supplies theoretical bases for detection methods . by using two - dimensional fft , the range and velocity information of target is got out from the echo . according to the periodicity range ambiguity of symmetrical pulses in fmpcw , the processing method of sliding time window is used
通过对差频信号进行的分析,得出了差频相位的具体表达式,表现出了要检测的各量的物理意义,对检测的方法提供了理论依据。利用二维fft方法,可以有效地提取回波中目标的距离与速度信息。对于fmpcw信号由于均匀脉冲产生的周期性距离模糊的问题,采取时间波门的处理方法。
|
您当前位置：