Weak light signal processing device and weak light signal detection system
A signal processing device and weak light technology, applied in measurement devices, photometry, optical radiation measurement, etc., can solve problems such as low detection accuracy of weak light signals
Active Publication Date: 2019-02-05
GUANGDONG SHUNDE IND DESIGN INST GUANGDONG SHUNDE INNOVATIVE DESIGN INST
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[0004] Based on this, it is necessary to provide a weak light signal processing device and a weak light signal detection system with high detection accuracy for the problem of low detection accuracy of traditional weak light signals
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[0015] refer to figure 1 , the weak optical signal processing device in one embodiment includes a photoelectric conversion circuit 110, a preamplifier circuit 120, a reference voltage output device 130, an adder 140, and a filter circuit 150. The photoelectric conversion circuit 110 is connected to the preamplifier circuit 120. The amplifier circuit 120 and the reference voltage output device 130 are connected to the adder 140 , and the adder 140 is connected to the filter circuit 150 .
[0016] The photoelectric conversion circuit 110 performs photoelectric conversion on the input weak optical signal and outputs a weak electrical signal to the preamplifier circuit 120. The preamplifier circuit 120 amplifies the weak electrical signal and then outputs the amplified electrical signal to the adder 140. The reference voltage output device 130 outputs the reference voltage signal to the adder 140. The adder 140 superimposes the amplified electrical signal and the reference voltage...
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The invention relates to a weak optical signal processing device and a weak optical signal detecting system. The weak optical signal processing device comprises a photoelectric converting circuit, a frontend amplifying circuit, a reference voltage output device, an adder and a filter circuit. The photoelectric converting circuit performs photoelectric conversion on an input weak optical signal and outputs a weak electric signal to the frontend amplifying circuit. The frontend amplifying circuit performs amplification on the weak electric signal and outputs an amplified electric signal to the adder. The reference voltage output device outputs a reference voltage signal to the adder. The adder superposes the amplified electric signal and the reference voltage signal and outputs a superposed signal to the filter circuit. The filter circuit performs de-noising processing on the superposed signal for obtaining a de-noised signal. Through signal superposing by means of the adder, an input offset voltage of an operational amplifier in the adder can be eliminated, thereby eliminating influence of the input offset voltage, realizing better effect of the de-noised signal which is obtained through filtering and de-noising of the filter circuit, and improving accuracy for detecting the weak optical signal.
Description
technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a weak light signal processing device and a weak light signal detection system. Background technique [0002] Weak light signal detection is the most important branch of weak signal detection. In actual measurement, different photoelectric information converters are often used to convert the weak optical signal submerged in noise into an analog electrical signal for measurement. This is the weak light signal. The basic idea of signal detection. The detection of weak light signals is an important part of modern detection technology. It is widely used in military, industrial production, biological image analysis and other fields. The detection method is to collect weak light to obtain weak light signals, and then perform Photoelectric detection. [0003] The traditional photoelectric detection process for weak light signals is: convert the weak light signals int...
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IPC IPC(8): G01J1/02
CPCG01J1/02
Inventor 胡艳刘玉县林晓明黄炜敏
Owner GUANGDONG SHUNDE IND DESIGN INST GUANGDONG SHUNDE INNOVATIVE DESIGN INST