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A Spectral Signal Data Sampling and Peak Detection Method

A peak detection and signal data technology, applied in the field of signal sampling and signal processing, can solve the problems of inability to real-time sampling, lower data throughput, and high cost

Active Publication Date: 2022-07-29
湖北方圆环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are mainly two methods for spectral detection instruments and equipment on the market: the first one, such as the invention patent CN201910704105-based on negative feedback adjustment, the fluorescence spectrum detection system adopts the upper computer + lower computer structure, and the lower computer samples data through the communication interface. The sampling data is sent to the host computer, and the signal processing and data analysis are performed on the host computer. The system circuit is complex and the cost is high. The data is sent to the MCU, and the peak value of the signal is calculated through the MCU software filtering and software peak-finding processing. Due to the MCU calculation speed limit, after sampling a certain amount of data, the sampling must be stopped for filtering calculation and peak-finding calculation. Real-time sampling is not possible, which reduces the data throughput rate.

Method used

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  • A Spectral Signal Data Sampling and Peak Detection Method
  • A Spectral Signal Data Sampling and Peak Detection Method

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Effect test

Embodiment 1

[0034] The embodiment of the present invention provides a spectral signal data sampling and peak detection method, including:

[0035] acquiring an optical signal, passing the optical signal through the detector 1000 to generate an electrical signal Vi, and passing the electrical signal through the preamplifier circuit 2000 to obtain a first voltage signal Va;

[0036] Amplify and filter the first voltage signal Va through the amplification, filtering and conditioning circuit 3000 to obtain a second voltage signal Vb;

[0037] Perform analog-to-digital conversion on the second voltage signal Vb through the ΣΔ ADC analog-to-digital conversion module 4000 to obtain the converted first serial digital signal D1 on the analog side;

[0038] The first serial digital signal D1 is electrically isolated by the electrical isolation circuit 5000 to obtain the second serial digital signal D2 on the digital circuit side;

[0039] Pass the second serial digital signal D2 through the first ...

Embodiment 2

[0045] In one embodiment, the second serial digital signal D2 is passed through the first Sinc x The filter 6110 performs filtering to obtain the first-level sampling data D3, and further includes:

[0046] Pass the second serial digital signal D2 through the second Sinc in the analog watchdog 6120 x Filter 6121 performs filtering to obtain three-level sampling data D4;

[0047] The upper threshold 6123 and the lower threshold 6122 are set according to the third-level sampling data D4; wherein, the lower threshold corresponds to the minimum scale value of the third-level sampling data D4, and the upper threshold is set to the effective rising edge of the spectral signal. Sampling data values, monitoring the third-level sampling data D4 of the spectral signal through the upper threshold 6123;

[0048] When the three-level sampling data D4 is greater than the upper limit threshold 6123, it is determined that the rising edge of the spectrum signal is monitored, and the analog w...

Embodiment 3

[0052] In one embodiment, when the three-level sampling data D4 is greater than the upper limit threshold 6123, it is determined that a rising edge of the spectrum signal is detected, and the analog watchdog 6120 generates a first interrupt signal, further comprising:

[0053] When the analog watchdog 6120 generates the first interrupt signal, obtains the maximum value 6131 and the minimum value 6132 in the extreme value register 6130, and clears the maximum value and the minimum value;

[0054] Perform secondary extreme value monitoring on the secondary sampling data D5 through the extreme value register 6130 to determine the maximum and minimum values ​​of the secondary extreme value monitoring;

[0055] Update the maximum value and minimum value of the secondary monitoring to the maximum value 6131 and the minimum value 6132, set the maximum value to the maximum scale value corresponding to the third-level sampling data D4, and set the minimum value to the spectral signal dr...

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Abstract

The invention provides a spectral signal data sampling and peak detection method, comprising: acquiring an optical signal, passing the optical signal through a detector to generate an electrical signal, passing the electrical signal through a preamplifier circuit to obtain a first voltage signal; The signal is amplified and filtered to obtain a second voltage signal; the second voltage signal is converted by analog-to-digital conversion through the ΣΔ ADC analog-to-digital conversion module to obtain the first serial digital signal; the first serial digital signal is electrically isolated to obtain the second serial digital signal; pass the second serial digital signal through the first Sinc x The filter performs filtering to obtain the first-level sampling data; the first-level sampling data is calibrated for zero offset error and linearity error through the data calibration register to obtain the second-level sampling data, and the second-level sampling data is monitored through the extreme value register to determine the extreme value. The maximum and minimum values ​​corresponding to the secondary sampling data; output the secondary sampling data to the storage unit for data storage.

Description

technical field [0001] The invention relates to the technical field of signal sampling and signal processing, in particular to a spectral signal data sampling and peak detection method. Background technique [0002] At present, with the development of optoelectronic technology, spectral detection technology has been greatly improved. However, there are mainly two ways of spectral detection instruments and equipment on the market: the first one, such as the invention patent CN201910704105-the fluorescence spectrum detection system based on negative feedback adjustment adopts the structure of upper computer + lower computer, the lower computer samples data, and passes the communication interface. The sampling data is sent to the upper computer, and the signal processing and data analysis are performed on the upper computer. The system circuit is complex and the cost is high. Another, as shown in the invention patent CN201810535990-a spectral detection system for gastric cancer...

Claims

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Application Information

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IPC IPC(8): G01J3/28H03M3/00
CPCG01J3/28H03M3/38G01J2003/2859
Inventor 魏烈祥汪天照陈荷香张晶文富春阳琴罗静贾伟强张威汤涛皮春辉廖辉秦鸣东秦笑儒
Owner 湖北方圆环保科技有限公司