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微弱光信号的光电检测系统设计外文翻译.
Photoelectric Detection System Designning of Weak Optical Signal
Sun Lifei , Wang Zenglin
(Jilin University of Electronic Science and Engineering Institute)
Abstract :
detailed analysis of the photoelectric detection system components,
expounded AD7714 chip in the photoelectric detection system, the
application converter Finally the AD7714 and AT89C52 interface circuit,
flowchart and key subroutine.
Keyword:
AD7714;89C52; Photoelectric detection system
Foreword:
photoelectric detection technology has been widely used in military,
industrial, agricultural, and the universe, environmental science, health
and other civilian areas. The use of modern technology as photoelectron
detection means with no contact, non-destructive, long-range,
anti-interference capability. Less affected by environment, testing speed,
high precision measurement advantages of the present detection technology
is the major trend. American companies AD D AD7714 chip is a charge balance
Analog to Digital. Converter It uses-sampling conversion technology to
achieve the 24 non-error analog signal modulation. It has high conversion
accuracy, excellent static properties and the integrity of the front and
simulation chip correction, particularly suitable for the measurement of
low-frequency small-signal. This paper successfully applied to AD7714
photoelectric detection system, and has made good use of effects. This
paper introduces the photoelectric detection system throughout the frame
structure, then analyzes the PIN photodiode photoelectric detection
circuit and AD7714 and microcontroller interface circuit, Finally process
diagram.
1 A photoelectric detection system block diagram
Photoelectric detection system block diagram shown in Figure 1, the optical
signal through optical-electrical signal conversion circuit voltage
signal to change, Analog to Digital Converters this voltage signal
corresponding to the digital input of the microcontroller. SCM digital
signal processing and the r
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