英语翻译帮我翻译一下,不要翻译软件翻译出来的那种,This power is radiatedisotropically

英语翻译
帮我翻译一下,不要翻译软件翻译出来的那种,
This power is radiated
isotropically and the amount of power available at a detector
at a certain distance from the source depends on the
distance as well as the area of the detector elements.
The pyroelectric detector converts incident thermal radiation
into an electrical signal.This conversion takes place
in three steps—the incident thermal radiation results in a
change in temperature,altering the charge density on the
electrodes.An electrical signal is generated by a preamplifier
or impedance converter.The current generated by incident
radiation is proportional to the change in temperature
as well as the area of the detector elements.13 If iP represents
the current flowing through the device on which an
incident thermal radiation causes a temperature change
where p is the pyroelectric constant and depends on the
material,and As is the area of the elements of the detector.
Since detection of human motion is of interest to us,
pyroelectric detectors seem ideal since they respond only to
changes in the heat flux that is associated with motion.This
also helps to cancel out ambient fluctuations.The important
characteristics of the pyroelectric detector that we used are
summarized in Table 1.
The power radiated by a human body is radiated isotropically
and the power at the detector is a function of the
area of the detecting elements as well as the distance between
the source and the detector.The maximum range at
which the sensor will work can be determined using the
noise equivalent power \1NEP\2 value from Table 1.This
parameter indicates the power level at which the SNR is 1,
i.e.,the minimum amount of power required to distinguish
signal from the noise.The maximum range is determined to
be about 100 m,using a detector having an NEP of
0.96 nW.This assumes ideal environmental conditions and
noise-free circuits.The practical range would therefore be
much less than this theoretical value.
Another important parameter is the response time of the
sensor to an input stimulus the sensor can respond to.The
response time of this detector is about 500 ms,making it
suitable for detecting human motion.By suitably modulating
the visibility of these detectors using optics and ensuring
that the limits of the detector in terms of response time
or in noise performance are not reached,human motion can
be detected over large areas.
We use a dual-element,current-mode pyroelectric detector
PIR325 obtained from Glolab Corporation.14 Using the experimental
setup shown in Fig.2,the step response and the
field of view of the sensor was obtained.An incandescent
bulb was used as the heat source with a shutter to modulate
the heat flux on the pyroelectric detector.One of the elements
用软件翻译出来的没用

呼.有很多专业术语啊.这么长.