Question

请教英语高手帮我翻译一下这段英文

3. Equipment
Specially designed arbitrary signal generator was used for
generation of low-frequency ultrasonic pulses. It is driven
by software running on personal computer. It generates
pulses with arbitrary form and duration. In order to drive the
ultrasonic transducer at non-resonant frequency a high
voltage sinusoidal signal with desired frequency is applied
on the piezo-element. The frequency can vary from 1 kHz
up to 300 kHz. The number of cycles can be adjusted
between 1 and 30. The output signal of the generator can be
modified with window function (Hanning, Hamming,
Gaussian and others). The application of window function
leads to reduction of output signal bandwidth. The
amplitude of the signal varies from 0 V to 5 V. This signal is
fed into high-power low frequency amplifier together with
the synchronization signal. The amplitude of the signal is
increased up to ±50 V (100 Vp-p). The bandwidth is 500
kHz. The output of the amplifier is directly connected to the
electrodes of the piezo-element. The build-in preamplifier
for the received signal has a variable gain of 80 dB and
output amplitude 10V. The output of the pre-amplifier is fed
into a digital oscilloscope. The sampling frequency is set to
1 MHz. The signal recording is done by standard software
supplied with the oscilloscope. The interconnection scheme
of the equipment is presented on figure 5.
Figure 5. Equipment set-up
4. Transducers construction
Specially designed piezo-electric transducers were used. The
piezo-element is rectangular with dimensions 18x9 mm and
thickness 5 mm. The damping body is made from composite
material with epoxy resin matrix and iron powder filler [6].
The filler content is around 50%wt. The acoustical
impedance of the backing material is around 45 MRayl and
is close to that of the piezo-element – 35 MRayl.

Answer 1

设备
特别设计的任意信号发生器是用于
新一代低频超声波脉冲。它是驱动
由计算机上运行的软件的个人电脑。它产生
豆类与任意形式和期限。为了推动
超声波传感器在非共振频率高
电压正弦信号的频率是应用
对压电元件。频率可以有很大的不同，从1千赫
高达300千赫。重复次数可作调整
1至30 。输出信号发生器，可
改性窗函数（汉宁，汉，
高斯和其他） 。应用窗函数
导致减产的信号带宽。该
振幅的信号不尽相同，从0 V至5 V的信号
美联储成高功率低频放大器连同
同步信号。振幅信号是
提高到± 50伏特（ 100峰峰值） 。带宽500
千赫。输出放大器是直接连接到
电极的压电元件。建造，在前置放大器
为接收信号有一个可变增益80分贝
输出振幅10V的。输出的前置放大器是美联储
转换成数字示波器。采样频率设置为
一兆赫。信号记录是由标准软件
供应示波器。联网计划
该设备是对图5 。
图5 。设备初成立
4 。传感器建设
特别设计的压电电传感器使用。该
压电元件是矩形尺寸18x9毫米
厚度5毫米。阻尼机构，是由复合材料
材料与树脂基体及铁粉填料[ 6 ] 。
填充物含量是50 ％左右每克。声学
阻抗的后盾材料约45 mrayl和
接近时表示，在该压电元件-3 5m rayl。