Portable Spectral Fast Detector Based on Quantum Effect Photodetector
A photodetector and quantum effect technology, applied in the field of spectral detection, can solve the problems of poor performance of anti-vibration, anti-environmental temperature and pressure change, uncompact structure, inability to meet the development of intelligence, miniaturization and light weight, etc., to achieve anti-vibration Good environmental temperature and pressure change performance, compact structure, and the effect of widening the working range
Active Publication Date: 2016-09-14
EAST CHINA NORMAL UNIV
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[0004] At present, all portable spectrometers use silicon CCD or CMOS array detectors. Since the band gap of silicon is 1.1eV, its response range is in the visible light range and its vicinity. The back-end data processing must be connected to a computer to display, so that the photoelectric receiving device and The back-end drive circuit and data acquisition and processing system are modularized and integrated, the structure is not compact, and the performance of anti-vibration and anti-environmental temperature and pressure changes is poor, especially cannot meet the needs of intelligent, miniaturized and lightweight development
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[0009] See attached figure 1 , the present invention consists of optical fiber probe 1, optical fiber combiner 2, quantum effect photodetector 3, readout circuit 4 front-end amplifier circuit 5, A / D converter 6, FIFO memory 7, microcontroller 8, LCD display or wireless The transceiver module 9 and the timing driving circuit 10 are composed. The quantum effect photodetector 3 is a high-sensitivity 1×64 element quantum well-quantum dot photodetection array docking readout circuit 4; the A / D converter 6 adopts an LTC1608 16-bit AD conversion chip, and its operating voltage is + / -6V, built-in high-performance sample-and-hold device and reference voltage source; described FIFO memory 7 adopts static RAM to buffer the CCD signal after A / D conversion; described timing drive circuit 10 is readout circuit 4, A / D The D converter 6 and the FIFO memory 7 provide CPLD timing drive; the microcontroller 8 adopts a STM32F407 main control chip containing an MCU, and the main control chip is ...
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The invention discloses a portable spectrum fast detector based on a quantum effect photodetector, which is characterized in that the detector consists of a probe, a combiner, a photodetector, an amplifying circuit, an A / D converter, a memory, and a microcontroller. Composed of a timing drive circuit, the combiner disperses and projects the light to be measured introduced by the probe to the photodetector as light of different wavelengths, and the electrical signal is read out by the readout circuit and input to the amplifier circuit, and the amplified electrical signal passes through the The A / D converter is buffered by the memory, and the microcontroller transmits the data to the LCD display or the wireless transceiver module through the USB interface or the WiFi module for terminal processing. Compared with the prior art, the present invention has modularization and intelligence, broadens the working range of the spectrum, improves the measurement accuracy, sensitivity and speed, has a compact structure and good performance, and especially satisfies environmental protection, field, on-site detection and spaceborne analysis Detection integration, miniaturization and lightweight requirements.
Description
technical field [0001] The invention relates to the technical field of spectrum detection, in particular to a portable rapid biological spectrum detector based on quantum effect photodetectors. Background technique [0002] A spectroscopic instrument is a device used to study and analyze the spectrum of a substance. Its basic function is to determine the spectral composition of the substance under study for absorption, emission, scattering or stimulated emission, including its wavelength and intensity. Spectral technology uses the absorption, reflection and scattering characteristics of light inside the sample to detect the parameters of the sample. It is widely used in environmental monitoring, biomedicine, science and technology agriculture, military analysis and industrial process monitoring, especially in food safety. The demand for a large number of civilian spectrometers such as , environmental and biological monitoring is growing. [0003] With the emergence of high-...
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IPC IPC(8): G01J3/28
Inventor 郭方敏郑厚植沈建华陈布雨
Owner EAST CHINA NORMAL UNIV