CN104331046A - Spectrometer signal acquisition system and acquisition method - Google Patents
Spectrometer signal acquisition system and acquisition method Download PDFInfo
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- CN104331046A CN104331046A CN201410570399.7A CN201410570399A CN104331046A CN 104331046 A CN104331046 A CN 104331046A CN 201410570399 A CN201410570399 A CN 201410570399A CN 104331046 A CN104331046 A CN 104331046A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a spectrometer signal acquisition system and acquisition method. The signal acquisition system comprises a signal acquisition module, a CPLD, a signal conversion module, a processing module and a motor. The processing module comprises a microcontroller module, a communication module, a data storage module and a data movement module. The communication module, the data storage module and the data movement module are connected in sequence; the microcontroller module is connected with the data storage module, the motor and the CPLD; the communication module and the microcontroller module are connected with an upper computer outside the system; the CPLD is connected with the signal acquisition module and the signal conversion module; and the signal conversion module is connected with the signal acquisition module and the data movement module. The beneficial effects of the spectrometer signal acquisition system and acquisition method are that the integration level is high, the speed is fast, and the reliability is good.
Description
Technical field
The invention belongs to Signal Collection Technology field, especially relate to a kind of signal acquiring system and acquisition method of spectrometer.
Background technology
Spectral instrument is the basic analysis tool of spectrum and spectrology, is the tool of Modern Astronomical, chemistry, each research field of physics and production field.Along with the development of science and technology, in fields such as mine prospection, biomedicine, environment measurings, microminiaturized requirement is proposed to spectral instrument.Compared with large-scale spectral instrument in the past, portable spectrometer have volume little, lightweight, low in energy consumption, use flexibly, cost performance advantages of higher; Micro spectrometer can, as optical electronic interface device and fibre-optical probe conbined usage, make measurement convenient simultaneously.The research of portable fiber-optic spectrometer more and more comes into one's own.
Traditional acquisition system adopts single-chip microcomputer provide pulse signal and carry out the work such as signal conversion and collection, although it is very simple to do hardware circuit like this, there is the wasting of resources more, the defect that frequency is lower.The sampling rate of such micro controller module also must be subject to the restriction of single-chip microcomputer dominant frequency.When signal acquisition module gathers signal, requirement of real-time is very high, once micro controller resume module is not come, must affect the response speed that a whole set of products changes for light intensity.If adopt digital circuit to provide pulse to ensure micro controller module to have enough resources, then peripheral circuit is too complicated, and board area is very large.There is the defect that the wasting of resources is more, frequency is lower, peripheral circuit is more complicated in the driving circuit how solving existing spectrometer signal acquisition module, becomes the focus of current countries in the world spectral instrument development.
Summary of the invention
Fundamental purpose of the present invention is to solve problems of the prior art, there is provided that a kind of integrated level is high, speed be fast, good reliability effectively can reduce board area, thus reduce the volume of spectral instrument and reduce signal acquiring system and the acquisition method of production cost spectrometer.
Technical scheme of the present invention is: a kind of signal acquiring system of spectrometer, comprise signal acquisition module, CPLD, signal conversion module, processing module and motor, described processing module also comprises micro controller module, communication module, data memory module and data-moving module, described communication module, data memory module is connected in order with data-moving module, described micro controller module respectively with data memory module, motor is connected with CPLD, communication module is also connected with the host computer of its exterior with micro controller module, described CPLD is connected with signal conversion module with signal acquisition module respectively, described signal conversion module is connected with data-moving module with signal acquisition module respectively, described micro controller module carries out signals collecting and signal conversion work by CPLD control signal acquisition module and signal conversion module, CPLD control signal acquisition module carries out the drive singal in signal acquisition process, signal conversion module converts the simulating signal of signal acquisition module collection to digital signal, data after signal conversion module converts by data-moving module are stored into data memory module, finally by communication module, the data collected are transferred to host computer from the data memory module of processing module inside.
Described CPLD is CPLD.
Described communication module adopts USB2.0 as communication interface.
Described processing module adopts STM32F103VBT6 as process chip.
Described motor adopts SLA7033 Driving Stepping Motor, and mechanical drive controls the position of grating.
Described signal acquisition module adopts TCD1208 sensor.
A signal acquisition method for spectrometer, is applied in the signal acquiring system of spectrometer, it is characterized in that: comprise the steps:
The signal acquiring system initialization of a, spectrometer starts;
B, processing module receive the acquisition instructions that host computer sends;
Time shutter of c, micro controller module setting signal acquisition module also sends signals collecting instruction to CPLD;
D, CPLD operation signal acquisition module carries out the pixel signal conversion of 2212 of a frame image data and gathers;
E, signal conversion module to be sent to micro controller module by CPLD and change ready notice to each in 2160 effective pixel points of the frame image data that signal acquisition module collects;
2160 effective pixel points data-movings in the frame image data that signal conversion module converts by f, data-moving module send settling signal to data memory module CPLD after a frame image data has been moved to micro controller module;
Data in data memory module are moved into host computer by communication module by g, micro controller module.
Further, after step g completes, will step b be turned back to, wait for that host computer sends acquisition instructions.
Further, in step c the time shutter of micro controller module setting signal acquisition module be 1 millisecond-15 seconds.
The advantage that the present invention has and good effect are:
(1) signal acquiring system of a kind of spectrometer of the present invention and acquisition method, utilize the hardware circuit based on CPLD design to replace digital integrated circuit, this system and method integrated level is high, speed fast, good reliability.
(2) signal acquiring system of a kind of spectrometer of the present invention and acquisition method, utilizes processing module the integrated data design of moving the data-moving function of module greatly can improve collecting efficiency.
(3) the data-moving function of data-moving module of the present invention, can be implemented in when not needing micro controller module and completes moving of data, thus saves the resource of micro controller module, improves the reliability of a whole set of products.
(4) signal acquiring system of a kind of spectrometer of the present invention effectively can reduce board area, thus reduce the volume of spectral instrument and reduce production cost, eliminate the peripheral components such as loaded down with trivial details RAM, FIFO, usb communication, thus reduce the volume of spectral instrument and reduce production cost, for the miniaturization of spectral instrument lays the foundation.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the signal acquiring system of spectrometer of the present invention;
Fig. 2 is the process flow diagram of the signal acquisition method of spectrometer of the present invention;
Fig. 3 is TCD1208 sensor sequential chart in the signal acquiring system of spectrometer of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1-2, the present invention is described further:
Technical scheme of the present invention relates to the signal acquiring system of spectrometer and signal acquisition method two themes of spectrometer, below elaborates.
A kind of signal acquiring system of spectrometer, comprise signal acquisition module, CPLD, signal conversion module, processing module and motor, described processing module also comprises micro controller module, communication module, data memory module and data-moving module, described communication module, data memory module is connected in order with data-moving module, described micro controller module respectively with data memory module, motor is connected with CPLD, communication module is also connected with the host computer of its exterior with micro controller module, described CPLD is connected with signal conversion module with signal acquisition module respectively, described signal conversion module is connected with data-moving module with signal acquisition module respectively, described micro controller module carries out signals collecting and signal conversion work by CPLD control signal acquisition module and signal conversion module, CPLD control signal acquisition module carries out the drive singal in signal acquisition process, signal conversion module converts the simulating signal of signal acquisition module collection to digital signal, data after signal conversion module converts by data-moving module are stored into data memory module, finally by communication module, the data collected are transferred to host computer from the data memory module of processing module inside.
The present invention utilizes the hardware circuit based on CPLD design to replace digital integrated circuit, and this system and method integrated level is high, speed fast, good reliability.
Described signal conversion module adopts LTC1603 as data conversion chip, be responsible for after signal amplification circuit, converting the simulating signal of signal acquisition module collection to digital signal, export with the parallel data of 16 data memory module be stored in processing module and carry out data storage.
Described communication module adopts USB2.0 as communication interface, and data rate can reach 480Mb/s.The application software of host computer directly can pass through usb communication with processing module.
Described processing module adopts STM32F103VBT6 as process chip, utilize and greatly can improve collecting efficiency based on STM32 as the design of processor, due to the data-moving function of the data-moving module in this processor, can be implemented in when not needing micro controller module and complete moving of data, thus save the resource of CPU, improve the reliability of a whole set of products, STM32 also completes other logic workings of signal acquiring system of spectrometer, as zero-detection, timing etc.
Described motor adopts SLA7033 Driving Stepping Motor, and mechanical drive controls the position of grating.
Described signal acquisition module adopts TCD1208 sensor to carry out the collecting work of signal.TCD1208 sensor often gathers frame data needs 2212 pulses, and namely every frame data will carry out 2212 secondary data conversions, letter etc., and the wherein said every frame data of TCD1208 sensor only have 2160 middle effective pixel points.
As shown in Figure 2, present invention also offers the signal acquisition method of spectrometer, be applied in the signal acquiring system of as above spectrometer, comprise the steps:
The signal acquiring system initialization of a, spectrometer starts;
B, processing module receive the acquisition instructions that host computer sends;
Time shutter of c, micro controller module setting signal acquisition module also sends signals collecting instruction to CPLD;
D, CPLD operation signal acquisition module carries out the pixel signal conversion of 2212 of a frame image data and gathers;
E, signal conversion module to be sent to micro controller module by CPLD and change ready notice to each in 2160 effective pixel points of the frame image data that signal acquisition module collects;
2160 effective pixel data in the frame image data that signal conversion module converts by f, data-moving module are moved data memory module CPLD after a frame image data has been moved and are sent settling signal to micro controller module;
Data in data memory module are moved into host computer by communication module by g, micro controller module.
After described step g completes, will step b be turned back to, wait for that host computer sends acquisition instructions.
In described step c the time shutter of micro controller module setting signal acquisition module be 1 millisecond-15 seconds.Exposure time parameter is got off by host computer transmission, micro controller module by timing the phase be provided with the time shutter, 1 millisecond-15 seconds.
Described processing module also completes corresponding logical action by motor-drive circuit control step motor, settling signal collection.
CPLD assists the collecting work of STM32F103VBT6 settling signal acquisition module.When the signal providing a commencing signal acquisition module to gather in processing module, namely CPLD starts to produce corresponding pulse sequence according to the sequential chart of TCD1208, and automatically start to operate the collection that analog-to-digital conversion module carries out a frame image data, often gather a pixel and complete a signal conversion with regard to operation LTC1603, the data-moving module that signal converts rear notification handler module carries out data carrying.In addition, CPLD also act as the I/O mouth expansion work of processing module.
The signal acquiring system of a kind of spectrometer of the present invention effectively can reduce board area, thus reduce the volume of spectral instrument and reduce production cost, eliminate the peripheral components such as loaded down with trivial details RAM, FIFO, usb communication, thus reduce the volume of spectral instrument and reduce production cost, for the miniaturization of spectral instrument lays the foundation.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (8)
1. the signal acquiring system of a spectrometer, it is characterized in that: comprise signal acquisition module, CPLD, signal conversion module, processing module and motor, described processing module also comprises micro controller module, communication module, data memory module and data-moving module, described communication module, data memory module is connected in order with data-moving module, described micro controller module respectively with data memory module, motor is connected with CPLD, communication module is also connected with the host computer of its exterior with micro controller module, described CPLD is connected with signal conversion module with signal acquisition module respectively, described signal conversion module is connected with data-moving module with signal acquisition module respectively, described micro controller module carries out signals collecting and signal conversion work by CPLD control signal acquisition module and signal conversion module, CPLD control signal acquisition module carries out the drive singal in signal acquisition process, signal conversion module converts the simulating signal of signal acquisition module collection to digital signal, data after signal conversion module converts by data-moving module are stored into data memory module, finally by communication module, the data collected are transferred to host computer from the data memory module of processing module inside.
2. the signal acquiring system of spectrometer according to claim 1, is characterized in that: described communication module adopts USB2.0 as communication interface.
3. the signal acquiring system of spectrometer according to claim 1, is characterized in that: described processing module adopts STM32F103VBT6 as process chip.
4. the signal acquiring system of spectrometer according to claim 1, is characterized in that: described motor adopts SLA7033 Driving Stepping Motor, and mechanical drive controls the position of grating.
5. the signal acquiring system of spectrometer according to claim 1, is characterized in that: described signal acquisition module adopts TCD1208 sensor.
6. a signal acquisition method for spectrometer, is applied in the signal acquiring system as the spectrometer of any one in claim 1-5, it is characterized in that: comprise the steps:
The signal acquiring system initialization of a, spectrometer starts;
B, processing module receive the acquisition instructions that host computer sends;
Time shutter of c, micro controller module setting signal acquisition module also sends signals collecting instruction to CPLD;
D, CPLD operation signal acquisition module carries out the pixel signal conversion of 2212 of a frame image data and gathers;
E, signal conversion module to be sent to micro controller module by CPLD and change ready notice to each in 2160 effective pixel points of the frame image data that signal acquisition module collects;
In the frame image data that signal conversion module converts by f, data-moving module 2160 effective picture point element data-movings send settling signal to data memory module CPLD after a frame image data has been moved to micro controller module;
Data in data memory module are moved into host computer by communication module by g, micro controller module.
7. the signal acquisition method of spectrometer according to claim 6, is characterized in that: after step g completes, and will turn back to step b, waits for that host computer sends acquisition instructions.
8. the signal acquisition method of spectrometer according to claim 6, is characterized in that: in step c the time shutter of micro controller module setting signal acquisition module be 1 millisecond-15 seconds.
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Application publication date: 20150204 |