At the same time, every next a period of time, take systemic photographs on the whole model with the camera, by comparing the distance of measuring points on the film, to get an absolute value of the displacement.

In order to study the application of modern interfering technology, the method for measuring the zero light path difference in white light interfering in the application of absolute length or displacement measurement is given in this paper.

为研究现代干涉技术的应用，提出一种测量绝对长度和位移大小的白光干涉中零光程差位置测量方法。

互联网摘选

The subject design signal processing circuit of the encoder with the core of 32-bit microprocessor μ PD70F3452, use the digital low-pass filter to remove noise by software, and design calculation program of absolute angular displacement.

以32位微处理器μPD70F3452为核心设计了编码器的信号处理电路，软件上采用低通滤波去除噪声，并设计了绝对角度计算程序。

互联网摘选

Study on Serial/ parallel Transform and Frequency Characteristics of Absolute Time-grating Displacement Sensor

串并转换思想与绝对式时栅传感器的频响特性研究

互联网摘选

Absolute vertical displacement monitoring system

绝对垂直位移监测系统

互联网摘选

The Research on the Wide Range Absolute Polarization Displacement Sensors

大量程绝对式偏振光位移传感器的研究

互联网摘选

Study on an Image Absolute Code Displacement Measuring System

图象式绝对码位移测量系统的研究

互联网摘选

And the resonant frequency and amplitude for cavity with samples differ from those for empty cavity obviously. Furthermore, the acoustic resonance spectroscopy of the small samples with different acoustic parameters differs from each other.

腔体中存在扰动体时的共振频率和幅度与空腔体中的共振频率和幅度之间存在比较明显的差别，并且声学参数不同的小扰动体之间的共振频率和幅度也各不相同。

互联网摘选

Thirdly, the thesis synthetically researches the realization scheme of electronic ballast used for MHL by the technical lays of basic topology, control strategy, method for free of acoustic resonance, ignition circuit.

然后，从金卤灯用电子镇流器的基本拓扑选择、控制策略、避免声谐振方法、点火电路几个主要技术层面综合研究了金卤灯用电子镇流器的可行性方案。

互联网摘选

In this paper, some research work has been made to acoustic resonance phenomenon as follows: 1 The mechanism of HID lamp is studied. HID lamp works in arc discharge status in steady state.

本文针对HID的声共振问题，主要做了如下的工作：1.对HID灯的发光机理进行了研究，在稳态下HID灯工作在弧光放电状态。

互联网摘选

It is shown by experimental data and testing waves that the chaotic modulation can decrease efficiently the PWM harmonics, reduce the electromagnetic interference, and suppress the acoustic resonance in HID lamp.

测试波形和数据表明：混沌调制技术能有效减小PWM电路产生的谐波，降低了输入级电路产生的电磁干扰，抑制了输出级的声谐振现象。

互联网摘选

Metal Halide lamps have very serious acoustic resonance problems, the most widely used method to achieve free acoustic-resonance is low-frequency square-wave electronic ballast with an additional pulse igniter.

金卤灯因其声谐振现象比较严重，通常采用低频方波驱动来彻底消除声谐振，附加点火电路。

互联网摘选

A new type of electronic ballast circuit was proposed to solve the problem of acoustic resonance which may occur in the electronic ballast for high-intensity discharge ( HID) lamps.

为解决高强度放电（HID）灯采用电子整流器时可能出现的音频共振问题，提出了一种新型的电子整流器电路。

互联网摘选

It is showed that the acoustic resonance phenomena would happen in high intensity discharge lamps working in high frequencies with appropriate exciting frequencies and enough energies at the same time.

研究表明，高强度气体放电灯高频工作且具备适当的激励频率和足够的能量时，会产生声谐振现象。

互联网摘选

There are acoustic resonance phenomena in HID lamps when driven at high frequency, which prohibits the developments of electronic ballast of HID lamps.

高强度气体放电灯在高频工作时特有的声谐振现象大大阻碍了高强度气体放电灯电子镇流器的发展。

互联网摘选

While the lamp is running in the steady-state, it can also make the lamp work at a low frequency square wave voltage and current a voiding acoustic resonance.

在稳态时可以使灯工作于低频叠加高频的方波电压，从而避免了声谐振的发生。

互联网摘选

The acoustic resonance spectroscopy ( ARS), which is a fundamental, promising and not very mature measurement, is used to measure acoustic velocity of sea water.

共振声谱法是测量海水声速的一种基本的、不太成熟且具有发展前景的测量方法。

互联网摘选

Acoustic resonance is due to the formation of the gas pressure wave created by standing wave. Plasma theory is introduced to explain the formative process of acoustic resonance.

声共振现象是由于气体的压力波形成驻波造成的，本文用等离子体理论分析了声共振现象形成的过程。

互联网摘选

A Highly Sensitive Doppler Limited Photoacoustic Overtone Spectrometer with a Ti: sapphire Ring Laser& Optical Multipass and Acoustic Resonance

高灵敏高分辨钛宝石激光光声光谱仪&光学长程+声学共振

互联网摘选

Novel Dimmable UHF Electronic Ballast without Acoustic Resonance On the supersonic impinging jet by Laser Doppler Velocimetry

一种新型可调光无声谐振超高频电子镇流器激光多普勒测速方法研究超声速冲击射流

互联网摘选

Three main research aspects for the electronic ballast: Suppression of acoustic resonance, Dimming, and Start-up control are summarized respectively.

在此基础上对目前高强度气体放电灯电子镇流器研究的三大研究热点：声谐振抑制技术、调光技术和启动技术进行了归纳和总结。在此基础上提出了本文的主要工作。

互联网摘选