锁相放大是微弱信号检测的重要手段。
Lock-in amplifying (LIA) is one of important means for weak signal detection.
将它应用于微弱信号检测，效果满意。
The method was satisfactorily applied in extracting weak signal.
给出了基于混沌微弱信号检测的具体方案。
The scheme of weak signal detection based on chaos is given.
相关检测技术是实现微弱信号检测的重要方法。
Correlative technology plays an important role in detection of feeble signal.
利用微弱信号检测技术，设计了动态数显血压计。
The dynamic digital display sphygmomanometer is designed by using the technology of weak signal detection.
针对微弱信号检测的特殊性，提出采用参考通道，并应用相关原理处理信号。
In the light of the characteristic of WSD (weak signal detecting), puts forward the reference channel and correlation principle to handle the signals.
介绍以TMS320C542为核心处理器的数据采集系统实现微弱信号检测。
This paper presents the data acquisition system which employing the processor of TMS320C542 detecting weak signal.
研究噪声中微弱信号检测的原理和方法，是测量技术中的综合技术和尖端领域。
The theory of weak signal detect is the key technology in signal detect field, which is an integrated technology based on electronics, information theory, physics and computer science.
以该方法为基础，具体分析了相关检测技术对于大口径微弱信号检测方法的适用性。
Also, the method of correlation detection is adopted to measure the weak signal in this measurement system.
然而，传统的微弱信号检测方法，输入信噪比门限受到一定限制，很难进一步降低。
However, the traditional weak signal detection method, input signal to noise ratio threshold are subject to certain restrictions, it is difficult to further reduce.
常规的微弱信号检测方法，如能量检测方法，对这类信号的检测不能满足实际需要。
The ordinary detection methods for weak signals, like energy detection method, can't meet the practical requirements for the detection of these signals.
测试数据处理采用了一些微弱信号检测技术来提高信噪比，从而提高了该系统的检测精度。
In the data processing system, methods for Weak signal detection are adopted to improve the accuracy.
基于微弱信号检测的方法，设计了应用AD8099实现的一种低噪声、高精度光电转换电路。
We designed a low-noise, high-precision I-V conversion circuit by use of AD8099 based on the method of weak signal testing.
本文提出的方法有效地提高了微弱信号检测输出的信噪比，大幅增加了单脉冲雷达的跟踪距离。
In the paper, the proposed method effectively improves the output noise ratio of the weak signal detection, and increases the monopulse radar tracking range a lot.
本文以弱信号检测为研究对象，提出了利用随机共振原理进行微弱信号检测的基本思想及具体实现方法。
Focusing on faint signal detection, this thesis presents the principle and practicable method to utilize SR for faint signal detection.
本文基于应用实践讨论了微弱信号检测原理、检测方法等，设计了近代物理微弱信号检测技术综合专题实验。
This paper mainly discusses the principles and ways of weak signal detection, based on the applying practice, and comprehensive topical experiment plan in the modern physics is designed.
实验室内研究需要产生包括混沌噪声在内的各种噪声，并叠加微弱周期信号作为微弱信号检测系统的信号源。
In laboratory study, all kinds of noise including chaotic noise, are needed to be generated, which iterated with weak periodic signal is used to be signal source.
基于混沌理论构建的信号检测系统具有敏感微弱周期信号和对噪声有强免疫力的特点，用于微弱信号检测领域优势明显。
Signal detection system based on chaos theory has the critical sensitivity to periodic signal and the immunity to the strong noise, which can be used in weak signal detection area.
大型的望远镜虽可以检测到微弱的信号，却只有很小的焦距。
Small telescopes see a lot of sky but can detect only strong signals. Large ones, which can detect weak signals, have a narrow focus.
在科学和工程实际中，常需检测微弱电流信号。
In science and project reality, we often need to measure the weak current signal.
过套管电阻率测井是一项重要的测井技术，该项目的一个难点为微弱信号的检测。
Through casing resistivity logging is an important logging technology, and the difficulty in this technology is the detection of weak signal.
其中利用光学斩光器对被测光进行调制使其与方波参考信号相关是对微弱光信号进行锁相检测的一种常用方法。
Using the optical chopper to modulate the detected light to make it related to the reference squarewave signal is a common method of locking phase detection of weak signals.
在时域和频域上进行了微弱荧光信号的寿命检测的研究。
Both on time domain and frequency domain, the detection for lifetime of weak fluorescence signal is studied.
但微小裂缝、穿孔引起的涡流检测信号很微弱，容易被各种噪声湮没，分辨起来较困难。
The eddy current signals from thin flaws and perforations are merged by noises and difficult to be distinguished.
微弱信号混沌检测则是此类技术的一个重要分支，虽然刚刚起步，却已取得了很大的进展。
Chaos detection for weak signals belongs to this technique. Although it is a new subject, it has already made a great progress.
为改善传感器的性能，微弱光强信号的检测需要载波调制和双光路补偿。
To improve its performance, a carrier modulation and double light route compensation are necessary for detecting faint optical power signals.
这种方法很好地解决了通用仪器难于检测微弱信号的技术不足。
The proposed method excellently solves the technical problem that common instrument is difficult to detect weak signal.
该文提出了一种新的检测白噪声中微弱信号的方法。
To detect the weak signals buried in noises is a fundamental and important problem.
目前，利用混沌振子检测微弱信号的两种方法分别是：基于系统相轨迹变化的方法和基于系统特征指数的方法。
There are two kinds of methods in detection for weak signals based on chaos: one is based on phase transition of the chaotic system, the other is to use some characteristic exponent of the system.
在用数字超声系统进行焊接接头评价时发现，噪声是微弱超声信号检测的主要障碍。
In the evaluation of welded joint using digital ultrasonic system, it is found that it is noise that constitutes the main difficulty in the detection of weak ultrasonic signal.
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