Aiming at the results affected deeply by signal bandwidth and transducer frequency response, we present an objective criteria and method to verify exactitude of the instrument system.
针对BUA测量受超声信号的频带及传感器特性影响较大的问题，制定适合目前相关仪器现状的客观标准，提出了一种验证BUA测量系统准确性的方法。
They work by sending out pulses of high-frequency sound and then interpreting the reflections as images.To do all this, though, you need a device called a transducer.
它们的工作原理是通过发出高频声波脉冲并将反馈的信息转变成图像，为了实现这一过程，你还需要一个叫做变频器的设备。
They work by sending out pulses of high-frequency sound and then interpreting the reflections as images. To do all this, though, you need a device called a transducer.
它们的工作原理是通过发出高频声波脉冲并将反馈的信息转变成图像，为了实现这一过程，你还需要一个叫做变频器的设备。
It was found that the transducer has the highest sensitivity at the 32nd order resonant frequency, which agrees with the experimental result. This indicates the validity of the model.
研究表明，其中第32阶谐振频率上探头的灵敏度最高，这一分析结果与实验结果基本一致，验证了所建立的理论模型的有效性。
The machine adopts dual-frequency conversion timing technology and Japan panasonic transducer, assuring every part drives synchronously.
采用双变频调速技术，日本松下变频器，保证机器各部位运行同步。
Selection of transducer type, footprint size, and frequency are critical to successful nerve block performance.
传感器类型，占用空间大小，频率的选择是成功神经阻滞的关键。
A sinusoidal fluid pressure generator for measuring the frequency response of pressure transducer system is presented.
本文描述了一种测量压力传感器系统频响用的正弦液压发生装置。
On the basis of SAW technology, this thesis designs a SAW humidity sensor. Include the design of IDT (interdigital transducer), the thin film as well as the frequency measurement system.
在对SAW传感器技术进行研究的基础上，本文设计了一个SAW湿度传感器，包括IDT(叉指换能器)的设计、薄膜的设计以及频率测量系统的设计。
The experimental results had shown that having removed the undesirable transverse effects of the transducer, the frequency response characteristics of the transducer are made desirable.
实验结果表明，这种方法消除了不需要的横效应，使换能器的频率响应特性达到我们所希望的要求。
Signal recovery technique is adopted to compensate the output which is distorted because of the frequency characteristics of seismic transducer.
利用信号恢复技术，对地震式低频振动传感器因频率特性而畸变的输出作补偿处理。
The system implements intellectualized transducer setting signal synchronous display in time and frequency domain as well as other multiple signal processing functions.
该系统利用软件实现了智能化的传感器设置、实时采集时的时域信号、频域信号同时显示和多种数据处理分析的功能。
It was pointed out that the keypoint in designing the special transducer was its working frequency and crystal Angle according to the coat thickness and flaw location.
根据外套壁厚和裂纹位置特点，提出了专用超声换能器的设计关键在于工作频率和晶片倾斜角。
The direct digital synthesizer (DDS) is used to sweep frequency for a sandwich piezoelectric transducer two admittance circles of the transducer about two different resonance frequencies is measured.
利用直接数字合成器(DDS)对夹心式换能器进行扫频，测得两个不同共振频率附近的导纳圆。
Such hoists change the power frequency through transducer and the lifting speed and the traveling speed to make the electric hoist travel more smoothly and more accurately.
变频功能型电动葫芦利用变频器使电源频率发生变化，实现电动葫芦起升机构和运行机构的变速，使电动葫芦运行更平稳、定位更准确。
The frequency area of big caliber vertex flow transducer is small, frequency unit of flow is very big, the change of ration meter display is very large what confine its wide use.
大口径涡街传感器频率范围很小，单位频率的对应流量很大，配套仪表显示流量的波动大，限制了大口径涡街传感器应用。
A composite motor vibration transducer with differential charge amplifier and adaptive frequency compensating circuit is introduced.
阐述了手持式内置微型差动式电荷放大器和频率补偿电路一体化的发动机振动传感器。
In order to increase the accuracy in measuring transient pressure by a pressure transducer, it is necessary to improve its frequency response property.
为了提高瞬态压力测量的精度，必须设法提高传感器的频响特性。
The testing system was mainly composed of PLC, MMI, frequency converter, approach switch and acceleration transducer.
并通过PLC、MI、频器、近开关、速度传感器等组成的控制系统完成了对零部件的振动试验。
In this paper, we present a frequency conversion electromotor system organized by voltage vector transducer and induction-motor.
本文研究了用电压矢量变频器和感应电动机构成的变频电动机系统。
We used a Mega Hz focused transducer to focus on the surface of the calculus model and tried different frequency, intensity, time and duty cycle.
本文利用兆赫兹频率级别的聚焦超声换能器诱发冲击波作用于结石模型材料，采用不同的声波参数包括频率、强度、占空比等进行了实验。
Utilizing variable frequency transducer to get the displacement signal directly, the multimeter can show the tension or compression deformation after the micro-processing of signal.
本仪表采用电感调频式传感器直接输出表征位移的数字信号，经单片机处理后，即可显示拉压变形量。
This work can be guidance of selection for the length of the capillary and the working frequency of the transducer.
这对实际键合中，换能系统末端的劈刀安装长度的选择以及换能杆工作频率的选择有指导意义。
The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band.
声发射源与接收讯号传感器间的距离以及环境噪声的电平是选择频带的主要依据。
Requirements for the characteristics of frequency response of the noise transducer are put forward so as to analyze the actual spectrum structure of noise.
为了客观地反应噪声信号的频谱结构，对井下噪声换能器的频谱响应特性提出了一定的要求。
The result shows that in order to obtain the strong echo signal, a suitable selection of the ultrasonic transducer operating frequency is necessary.
由此表明，选择合适的声发射换能器，有助于提高液位检测回波信号的强度。
Based on the G-M system contrast to the system of frequency conversion, the paper introduces the improvement of advocate-drag system of dragon-planer of transducer of B2012A and PLC.
在G - M系统和变频调速系统进行比较的基础上，介绍了基于PLC、变频器的B2012A型龙门刨床主拖动系统的改造。
The technology of matching layer transducer is an efficient method in middle-high frequency among many methods of broaden the frequency of transducers.
在众多拓宽换能器频带的方法中，匹配层宽带换能器技术在中高频段是一种较为行之有效的方法。
The design principle, circuit analysis, and transducer construction of the low frequency ultrasonic tester are described. The applications to testing concretes and rocks are discussed.
本文叙述了低频超声波检测仪的设计原理，电路分析，换能器结构并讨论了在混凝土，岩体中应用。
Finally, an asymmetrical multi-frequency transducer is designed, the resonant frequency of transducer is obtained, that is, This type of transducer can be used in ultrasonic cleaning and other fields.
另外还设计了一种非对称的多频纵振动换能器，其共振频率方程为：这种类型的多频纵振动换能器可以应用到超声清洗中。
By changing the cross sectional radius decay coefficient of the exponential metal horns, the longitudinal and torsional vibrations in the transducer could resonate at the same resonance frequency.
通过改变换能器前后指数型盖板的半径减编系数，得出了换能器中纵向与扭转两种振动模式同频共振的条件。
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