CN104516990A - Online high-speed multi-channel spectroscopic data gathering system - Google Patents
Online high-speed multi-channel spectroscopic data gathering system Download PDFInfo
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- CN104516990A CN104516990A CN201410787414.3A CN201410787414A CN104516990A CN 104516990 A CN104516990 A CN 104516990A CN 201410787414 A CN201410787414 A CN 201410787414A CN 104516990 A CN104516990 A CN 104516990A
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Abstract
The invention discloses an online high-speed multi-channel spectroscopic data gathering system and relates to the field of signal gathering systems. The online high-speed multi-channel spectroscopic data gathering system solves the problems that an existing spectroscopic data gathering system using a single chip to gather data is low in gathering speed, bad in flexibility and incapable of meeting the online high-speed data gathering need. The online high-speed multi-channel spectroscopic data gathering system is electrified to initialize, an FPGA chip sends clock signals and control signals to A/D conversion chips to start the A/D conversion chips, analog signals are output to two A/D conversion chips after passing through a primary amplifier, a low-pass filter and a secondary amplifier, the A/D conversion chips carry out analog-digital conversion on the conditioned analog signals and output digital signals, and the FPGA chip temporarily stores the digital signals in an SRAM buffer; after ending temporary storage, the FPGA chip enables an address bus, a data bus and a control bus communicating with a computer, the computer reads the data in the SRAM buffer, after reading the data, the FPGA chip eliminates the storage data in the SRAM buffer to release the SRAM buffer space. The online high-speed multi-channel spectroscopic data gathering system is fast in gathering speed, convenient to use, agile, and capable of meeting the online high-speed gathering need.
Description
Technical field
The present invention relates to signal acquiring system technical field, be specifically related to a kind of online high-speed multiple channel spectrum data gathering system.
Background technology
Soil nutrient number have vital impact for the growth of crops and the use of fertilizer, for soil nutrient analysis can give peasant sowing and fertilising with directive function.For the analysis of soil nutrient, can be realized by near-infrared spectrometers.For online data high speed acquisition, the temporary and transmission of near-infrared spectrometers, be a vital part in this spectroanalysis instrument, directly affect the performance of spectroanalysis instrument.Existing spectrum data gathering system is generally by chip microcontroller, but the speed of single-chip microcomputer is comparatively slow, does not possess dirigibility and ease for use, can not meet the needs of the online high-speed data acquisition of spectroanalysis instrument.
Summary of the invention
The picking rate existed in order to the spectrum data gathering system solving the data acquisition of existing employing chip microcontroller is comparatively slow, very flexible, can not meet the problem of online high-speed data acquisition needs, the invention provides a kind of online high-speed multiple channel spectrum data gathering system.
The technical scheme that the present invention adopts for technical solution problem is as follows:
Online high-speed multiple channel spectrum data gathering system of the present invention, comprising:
Fpga chip;
The sram cache device be connected with fpga chip;
The computing machine be connected with fpga chip;
Signal condition converting unit, described signal condition converting unit comprises the first stage amplifier be connected with spectroanalysis instrument, the low-pass filter be connected with first stage amplifier, the two-stage amplifier be connected with low-pass filter, two A/D conversion chips being connected with two-stage amplifier; Two A/D conversion chips are all connected with fpga chip;
System electrification, fpga chip initialization, to A/D conversion chip tranmitting data register signal configures A/D conversion chip, transmit control signal and start A/D conversion chip, spectroanalysis instrument export simulating signal amplify through the one-level of first stage amplifier successively, low-pass filter filtering, two-stage amplifier secondary amplification after export to two A/D conversion chips respectively, A/D conversion chip carries out analog to digital conversion output digit signals to the simulating signal after conditioning, and fpga chip receives this digital signal and kept in in sram cache device; After temporary end, enable address bus, data bus and the control bus with compunication of fpga chip, to computing machine tranmitting data register signal, computing machine starts to read the digital signal in sram cache device, after reading, computing machine sends feedback signal to fpga chip, and fpga chip removes the storage data in sram cache device, release sram cache device space.
Described fpga chip adopts EP4CE6F17C8 series.
Described A/D conversion chip adopts ADS1278.
The invention has the beneficial effects as follows: online high-speed multiple channel spectrum data gathering system of the present invention, adopt 2 high-speed a/d conversion chips to realize 16 circuit-switched data to export simultaneously, adopt fpga chip programming Control greatly can improve picking rate, meet the quick on-line optical spectroscopy analysis of soil nutrient, fpga chip exploitation flexibly, convenient, I/O pin enriches, collection capacity can flexible configuration and expansion, fpga chip is more a lot of soon than the speed of single-chip microcomputer, the data acquisition request that high speed is online can be met, the structural design of FPGA+SRAM can keep in mass data, and can send data in computing machine, realize the data acquisition of online high-speed multiple channel, data temporary storage and data send.
Accompanying drawing explanation
Fig. 1 is the structure composition frame chart of online high-speed multiple channel spectrum data gathering system of the present invention.
Fig. 2 is the structured flowchart of signal condition converting unit.
Fig. 3 is fpga chip to the control procedure schematic diagram of sram cache device and A/D conversion chip.
Fig. 4 is the communication process schematic diagram of fpga chip and computing machine.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, online high-speed multiple channel spectrum data gathering system of the present invention, be made up of signal condition converting unit, fpga chip, sram cache device and computing machine, signal condition converting unit is connected with spectroanalysis instrument, fpga chip is connected with computing machine with signal condition converting unit respectively, and sram cache device is connected with fpga chip.
Signal condition converting unit is for gathering the simulating signal of spectroanalysis instrument and being converted into digital signal, as shown in Figure 2, signal condition converting unit is made up of first stage amplifier, low-pass filter, two-stage amplifier and two A/D conversion chips, first stage amplifier is connected with low-pass filter with spectroanalysis instrument respectively, low-pass filter is connected with two-stage amplifier, two-stage amplifier is connected with two A/D conversion chips respectively, two A/D conversion chips are all connected with fpga chip, A/D conversion chip, before reception simulating signal, needs to nurse one's health simulating signal.
As shown in Figure 3, after system electrification, fpga chip carries out initialization, to A/D conversion chip tranmitting data register signal configures A/D conversion chip, transmit control signal to A/D conversion chip and start A/D conversion chip, the simulating signal that spectroanalysis instrument exports is successively through the one-level amplification of first stage amplifier, the filter action of low-pass filter, two A/D conversion chips are exported to respectively after the secondary amplification of two-stage amplifier, A/D conversion chip carries out analog to digital conversion output digit signals to the simulating signal after conditioning, fpga chip receives this digital signal and is kept in in sram cache device.As shown in Figure 4, when after this temporary end, enable address bus, data bus and the control bus with compunication of fpga chip, to computing machine tranmitting data register signal, computing machine starts to read the digital signal in sram cache device, and after reading, computing machine sends feedback signal to fpga chip, the storage data of respective channel resets after receiving the feedback signal of computing machine by fpga chip, release sram cache device space.
In present embodiment, fpga chip adopts EP4CE6F17C8 series.
In present embodiment, two A/D conversion chips all adopt ADS1278, to realize the function that 16 circuit-switched data export simultaneously.
Claims (3)
1. online high-speed multiple channel spectrum data gathering system, is characterized in that, comprising:
Fpga chip;
The sram cache device be connected with fpga chip;
The computing machine be connected with fpga chip;
Signal condition converting unit, described signal condition converting unit comprises the first stage amplifier be connected with spectroanalysis instrument, the low-pass filter be connected with first stage amplifier, the two-stage amplifier be connected with low-pass filter, two A/D conversion chips being connected with two-stage amplifier; Two A/D conversion chips are all connected with fpga chip;
System electrification, fpga chip initialization, to A/D conversion chip tranmitting data register signal configures A/D conversion chip, transmit control signal and start A/D conversion chip, spectroanalysis instrument export simulating signal amplify through the one-level of first stage amplifier successively, low-pass filter filtering, two-stage amplifier secondary amplification after export to two A/D conversion chips respectively, A/D conversion chip carries out analog to digital conversion output digit signals to the simulating signal after conditioning, and fpga chip receives this digital signal and kept in in sram cache device; After temporary end, enable address bus, data bus and the control bus with compunication of fpga chip, to computing machine tranmitting data register signal, computing machine starts to read the digital signal in sram cache device, after reading, computing machine sends feedback signal to fpga chip, and fpga chip removes the storage data in sram cache device, release sram cache device space.
2. online high-speed multiple channel spectrum data gathering system according to claim 1, is characterized in that, described fpga chip adopts EP4CE6F17C8 series.
3. online high-speed multiple channel spectrum data gathering system according to claim 1, is characterized in that, described A/D conversion chip adopts ADS1278.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410787414.3A CN104516990A (en) | 2014-12-17 | 2014-12-17 | Online high-speed multi-channel spectroscopic data gathering system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410787414.3A CN104516990A (en) | 2014-12-17 | 2014-12-17 | Online high-speed multi-channel spectroscopic data gathering system |
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| CN104516990A true CN104516990A (en) | 2015-04-15 |
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| CN201410787414.3A Pending CN104516990A (en) | 2014-12-17 | 2014-12-17 | Online high-speed multi-channel spectroscopic data gathering system |
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Cited By (2)
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| CN109222853A (en) * | 2018-11-19 | 2019-01-18 | 苏州新光维医疗科技有限公司 | Endoscope and endoscope working method |
| CN110045911A (en) * | 2019-02-22 | 2019-07-23 | 广东高云半导体科技股份有限公司 | Analog-digital conversion control circuit and single-chip microcontroller analog to digital conversion circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109222853A (en) * | 2018-11-19 | 2019-01-18 | 苏州新光维医疗科技有限公司 | Endoscope and endoscope working method |
| CN110045911A (en) * | 2019-02-22 | 2019-07-23 | 广东高云半导体科技股份有限公司 | Analog-digital conversion control circuit and single-chip microcontroller analog to digital conversion circuit |
| CN110045911B (en) * | 2019-02-22 | 2020-09-25 | 广东高云半导体科技股份有限公司 | Analog-to-digital conversion control circuit and singlechip analog-to-digital conversion circuit |
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Application publication date: 20150415 |