time gain 在 工业通用技术及设备 分类中 的翻译结果

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工业通用技术及设备

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time gain

    Influence on the Time Gain and the Time correlation from the Fluctuant Phase of the Acoustic Signal

    相位起伏对水声信号时间增益及时间相关性能的影响

    One set of circuits with constant parameter Q is used to realize the echo receiving of different frequencies. Instead of the traditional time gain controlling technique, reverberation gain controlling technique is applied to realize large dynamic range condensing and reverberation background normalization.

    系统采用一套硬件电路实现了恒 Q值的多个回波频率的接收 ,并采用混响增益控制代替传统的时间增益控制 ,实现了对水下信号的大动态范围压缩和海洋噪声背景的归一化处理。

短句来源

    Basic principles of the medical ultrasonic diagnostic instruments and the time gain compensation circuit are briefly introduced, and a new design of TGC circuits using new electronic components is proposed in this paper.

    文章简要介绍了超声诊断仪器的深度时间增益补偿电路(TGC)的基本原理,即用一定的电压曲线来控制放大器的增益,使不同深度下的超声回波获得不同的放大倍数。 文中还提出了一种采用新型电子元器件的数字控制解决方案,能有效减小送入A/D转换器的信号的动态范围。

短句来源

    Design of time gain compensation circuit for ultrasonic signals

    超声衰减增益补偿电路的设计

短句来源

    When passive synthetic aperture technique is applied to linear array, we can achieve a longer dummy array which is several or several decade times of conventional real aperture linear array. By exchanging time gain with spatial gain, passive synthetic aperture processing makes use of delay compensation to obtain higher dynamic spatial gain, and extremely improve detecting performance of weak signal.

    被动合成孔径技术应用于线列阵可以获得几倍到几十倍于实际物理声阵的合成虚拟孔径阵，它基于利用时间处理增益转换为空间处理增益思想，通过时间补偿，获得高动态空间增益，提高了对微弱信号检测性能。

短句来源

    We handle the analysis of variance and the regression analysis to deal with the data of the experimentation about the drying time, gain the best scheme and the best model of the regression equation for the Vacuum Freeze-drying process of the cucumber. We check out the best scheme and the best result of the regression equation by the experimentation.

    运用极差分析和回归分析对干燥时间的实验结果进行了数据处理，，得到黄瓜真空冷冻干燥过程的最优回归方程和最优方案，并通过实验进行了验证。

短句来源

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  time gain

It is shown that the analysis-time gain can be obtained for the invariable characteristics of the detection efficiency compared with the well-known algorithms.

An Analog Integrated Circuit for Continuous-Time Gain and Offset Calibration of Sensor Arrays

Characteristic viscosity introduction appears to present a useful option compared to rheological modelisation based on experimental data, with computer time gain and relevant results for quantitative and qualitative WSS determination.

Robotic Manipulators State Observation Via One-Time Gain Switching

In contrast to this, little information is gained on the hyperfine structure of the M?ss-bauer spectra, yet the time gain by scanning the outermost crystalline phase Zeeman line intensity is substantial.

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In this paper, a method named as the Difference Ratio Correction (DRC) Method is proposed to estimate the acoustical attenuation in vivo using the video output of commercial B-scanners. This method eliminated the affects of such factors as gains, the Time-Gain-Compensatin of the scanner, the diffraction and scattering of the beam of the probe, etc. Another advantage of the method is that it needn't modify the construction of the scanner, hence, it can be applied to clinical situations easily....

In this paper, a method named as the Difference Ratio Correction (DRC) Method is proposed to estimate the acoustical attenuation in vivo using the video output of commercial B-scanners. This method eliminated the affects of such factors as gains, the Time-Gain-Compensatin of the scanner, the diffraction and scattering of the beam of the probe, etc. Another advantage of the method is that it needn't modify the construction of the scanner, hence, it can be applied to clinical situations easily. In this paper, the formula used to calculate the attenuation slope of ultrasonic tissue mimicking phantoms measured by the DRC method is reported and compared with those from the transmission method. Experimental results support the effectiveness of the method.

本文介绍了一种利用B超视频输出信号进行体内组织声衰减估计的方法——差比校正法.该法利用已在临床上普及应用的B超,消除了B超的增益,时间增益补偿、声束的扩散和散射等因素的影响,并且不需对现有B超做任何改动,具有较广泛的实用性.本文还从理论上导出了计算体内组织声衰减系数的计算公式,给出了差比校正法对超声仿真模型的声衰减系数的测量结果,并与传输法所得结果进行了比较.实验结果证明了差比校正法的有效性.

In order to receive the echo of the underwater target, a method to design a kind of high precision, wide dynamic range, general receiver is presented in this paper. One set of circuits with constant parameter Q is used to realize the echo receiving of different frequencies. Instead of the traditional time gain controlling technique, reverberation gain controlling technique is applied to realize large dynamic range condensing and reverberation background normalization. Through sea test, it has been...

In order to receive the echo of the underwater target, a method to design a kind of high precision, wide dynamic range, general receiver is presented in this paper. One set of circuits with constant parameter Q is used to realize the echo receiving of different frequencies. Instead of the traditional time gain controlling technique, reverberation gain controlling technique is applied to realize large dynamic range condensing and reverberation background normalization. Through sea test, it has been proved that the system has high precision, good adaptability, wide dynamic range and stable performance. The principle, the hardware construction and its performance are discussed in this paper.

为了接收水下目标反射回波 ,研究并设计了一种高精度、大动态范围的通用水声接收机。系统采用一套硬件电路实现了恒 Q值的多个回波频率的接收 ,并采用混响增益控制代替传统的时间增益控制 ,实现了对水下信号的大动态范围压缩和海洋噪声背景的归一化处理。海上试验证明 ,系统具有精度高、适应性强、动态范围大、电路性能稳定、经济实用等特点。介绍了该系统的工作原理、硬件结构及系统性能等。

Ultrasonic energy is absorbed by the penetrated medium and is attenuated with depth. Therefore, it needs compensation so as to limit the dynamic range of the signal sent to the A/D converter. Basic principles of the medical ultrasonic diagnostic instruments and the time gain compensation circuit are briefly introduced, and a new design of TGC circuits using new electronic components is proposed in this paper. AD604 is an ultra-low noise, very accurate, and linear-in-dB variable gain amplifier optimized...

Ultrasonic energy is absorbed by the penetrated medium and is attenuated with depth. Therefore, it needs compensation so as to limit the dynamic range of the signal sent to the A/D converter. Basic principles of the medical ultrasonic diagnostic instruments and the time gain compensation circuit are briefly introduced, and a new design of TGC circuits using new electronic components is proposed in this paper. AD604 is an ultra-low noise, very accurate, and linear-in-dB variable gain amplifier optimized for time-based variable gain control in ultrasound applications. The described design method is simple and its digital control is stable.

医用超声仪器发出的超声波在人体内的传播过程中,能量被人体组织吸收,随着探测深度的增加,超声波能量逐渐衰减,回波信号的动态范围很大,因此要进行声程补偿。文章简要介绍了超声诊断仪器的深度时间增益补偿电路(TGC)的基本原理,即用一定的电压曲线来控制放大器的增益,使不同深度下的超声回波获得不同的放大倍数。文中还提出了一种采用新型电子元器件的数字控制解决方案,能有效减小送入A/D转换器的信号的动态范围。该方案采用新型的高精度、低噪声、增益可变放大器AD604,电路简单,控制信号稳定可靠,能准确地补偿超声波在人体内的衰减,并为控制系统实现高速数字化提供了一个方法。

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  本文关键词：工业通用技术及设备，由笔耕文化传播整理发布。