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AWOS 题目20070323(问答题)(国外英文资料)
AWOS 题问答题)(国外英文资料)
On the working principle of Grohe cloud.
The ceilometer transmitter emits a beam of light pulse to pulse, sent from the transmitter, the cloud base after reflected by the receiving terminal detected by measuring the optical signal from transmitter to be received by the time required to determine the height of the cloud. Because the moment the intensity of the returned signal reflects the reflectance of the corresponding altitude, so from the return signal, you can get on the cloud, fog, rain and other information.
The reflective layer height of H = C*T/2 (C is the speed of light, T time)
Five
Two
Grohe CT12K cloud transmitter including what the main components?
Including high voltage rectifier, laser diode, laser diode trigger circuit.
Five
One
Please draw the block diagram of the CT12K Grohe cloud transmitter.
[see CT12K Grohe cloud technology manual answer. From diagram that entry]
Five
Two
Grohe CT12K cloud receiver including what the main components?
The receiving photodiode, high voltage power supply, filter, I-U conversion pre amplifier.
Five
One
Electronic circuit CT12K Grohe cloud processing board CTM12 according to the function which can be divided into 4 main parts?
Part CPU, part of the monitor, the sequence control part, amplifier section.
Five
One
Grohe CT12K cloud monitor board two photosensitive diode plays what role?
One is used to monitor the laser frequency, a surveillance sky background noise.
Five
One
The laser pulse generated by the Grohe CT12K cloud what parts, by what?
Produced by the transmitter board CTT12, GaAs laser diode laser treatment in the control board under the laser pulse trigger signal.
Five
Two
The calibration step on the Grohes CT12K cloud.
Black, non reflective cloth will completely cover the transmitter window ceilometer, connected to a portable computer, even in the PCPLUS program execution machine:
AUTO OFF
GAIN 0
LASE ON
SEQ ON
240 CAL four minutes after the completion of the automatic calibrati
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