CN104299407A - High voltage IGBT module real time data synchronous acquisition system and acquisition method thereof - Google Patents
High voltage IGBT module real time data synchronous acquisition system and acquisition method thereof Download PDFInfo
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Abstract
The invention provides a high voltage IGBT module real time data synchronous acquisition system. The real time data synchronous acquisition system comprises data acquisition modules, optical fibers, a data storage module and a data transmission module. The invention also provides a real time data synchronous acquisition method. The real time data synchronous acquisition method comprises the following steps: the data storage module generates a synchronous clock signal, the synchronous clock signal is transmitted through the optical fibers to the data acquisition modules, real time data acquisition is carried out on the data acquisition modules under the control of the synchronous clock signal, acquired parameters are converted into a digital signal, the digital signal is transmitted through one of the fibers to the data storage module, the data storage module stores fault data information, and the data transmission module transmits the fault information to a host computer or a wireless receiving terminal in order to solve a problem that fault information cannot be stored in the prior art and realize high isolation among the acquisition modules and between the acquisition modules and the storage module and the synchronous acquisition of all channel data. The system and the method provide powerful data for subsequent product improvement and failure analysis.
Description
Technical field
The invention belongs to semiconductor power device and applied technical field, relate to a kind of semiconductor power device real-time data synchronization acquisition system, be specifically related to a kind of high-voltage IGBT module real-time data synchronization acquisition system, the invention still further relates to the method adopting said system to carry out the collection of high-voltage IGBT module real-time data synchronization.
Background technology
Power semiconductor device, by the fast development of nearly half a century, manufacturing technology is greatly improved.As the GTR in the widespread use of high-power field, GTO, MOSFET constant power device, just towards variation, modularization, Composite, high voltage, the future development of big current, to be adapted to jumbo equipment, but its current gain is low, and the driving power of needs is large, and driving circuit is complicated, makes it be very restricted in the application.By comparison, insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor) is maximized favourable factors and minimized unfavourable ones, taken into account the high input impedance of MOSFET and the low conduction voltage drop of GTR, make IGBT in powerful occasion obtain and apply more widely.IGBT has gathered high pressure, big current, high frequency three advantages technology; realizing energy-saving and emission-reduction; environmental protection aspect has very large advantage, is acknowledged as the representational product of third time electric and electronic technical field revolution most, becomes the inevitable direction of future electrical energy electronic device applications development.
In China, the market of IGBT module increases fast along with the burst growth of several large application, and comprising frequency-conversion domestic electric appliances market, motor frequency conversion drives market, bullet train market, new forms of energy and intelligent grid.IGBT module is the core component in these power electronic equipments, its price is high, the design factors such as inside modules structure, main circuit or Drive and Control Circuit or environment run the many-sided reason of factor and it all may be caused to lose efficacy, and the inefficacy of IGBT module brings huge economic loss by enterprise.From current practical operation situation, often can there is the damage of unknown cause in IGBT module in some application scenario, and therefore, each parameter such as electric current, voltage before being damaged in circuit carries out gathering and storing analyzing failure cause most important.Meanwhile, in order to carry out product quality monitoring, tracking, grasp in real time current transformer product running status at the scene and running environment significant, be conducive to improving management of product quality and efficiency, and provide foundation for the design of product from now on and improvement.IGBT module real-time data synchronization acquisition system can address this problem well.This system is mainly monitored by some the real-time status amounts (comprising longitude, latitude, speed, direction, voltage and electric current etc.) run IGBT module and is gathered, and is presented on electronic chart in the mode of animation by the track of locomotive driving.When an error occurs, extract the data message gathered, pre-service is carried out to the data gathered, the characteristic quantity extracted required for fault diagnosis is analyzed, complete the diagnosis to IGBT module fault, for the design of subsequent product provides recommendation on improvement, improve design and the quality of production of IGBT module.
Summary of the invention
The object of the present invention is to provide a kind of high-voltage IGBT module real-time data synchronization acquisition system, solve prior art cannot carry out Real-Time Monitoring problem to the on-the-spot service data of high-voltage IGBT module, the IGBT module related data passage being in upper and lower bridge arm is made to reach the isolation voltage of tens more than KV and realize the synchronous acquisition of data, the validity of data and reliability when ensureing to carry out fault analysis.
Another object of the present invention is to provide the method adopting said system to carry out the collection of high-voltage IGBT module real-time data synchronization.
The technical solution adopted in the present invention is, a kind of high-voltage IGBT module real-time data synchronization acquisition system, comprise multiple data acquisition module, each data acquisition module is connected with data memory module by two optical fiber, and data memory module is connected with data transmission module again;
The wherein optical fiber be connected with each data acquisition module for transfer encoding data, the transmission carrying out coded data by optical fiber realize each data acquisition module interblock and between data acquisition module and data memory module up to the isolation of 10KV;
The other optical fiber be connected with each data acquisition module for transmitting synchronous clock signal, the transmission carrying out synchronizing clock signals by optical fiber realize each data acquisition module interblock mutually isolated while ensure the synchronous acquisition of data.
Feature of the present invention is also:
Data acquisition module comprises main control chip, main control chip is embedded with data encoder and A/D controller, data encoder connects A/D converter and fiber optic transmitter A respectively, the data that A/D converter is changed by data encoder are carried out encoding and to be sent by fiber optic transmitter A, A/D controller is connected with A/D converter with fiber optic receiver B respectively, control the analog-digital conversion that A/D converter carries out data under the control of the synchronizing clock signals that A/D controller sends at fiber optic receiver B, A/D converter is also connected with data conditioning circuit;
Data memory module comprises FPGA control chip, is provided with access control in FPGA control chip, address control unit, phase-locked loop pll, clock chip controller, fiber data processor, SDRAM read-write controller, FLASH read-write controller and communication controler, access control, address control unit respectively with clock chip controller, fiber data processor, SDRAM read-write controller, FLASH read-write controller, communication controler connects, data memory module also comprises fiber optic receiver A, fiber optic receiver A is connected with fiber data processor, fiber optic receiver A gives fiber data processor after receiving the coded data from an optical fiber and carries out data decode, clock chip is connected with clock chip controller, SDRAM storer is connected with SDRAM read-write controller, FLASH memory is connected with FLASH read-write controller, fiber optic transmitter B is connected with phase-locked loop pll, and the synchronizing clock signals that phase-locked loop pll produces by fiber optic transmitter B is sent to data acquisition module by another root optical fiber,
Data transmission module is connected with the communication controler in data memory module.
Data transmission module comprises usb communication chip, and usb communication chip is connected with host computer, and usb communication chip is connected with the communication controler in data memory module;
Or data transmission module comprises RS485 serial communication chip, RS485 serial communication chip is connected with GPRS wireless communication module and radio receiving terminal successively, and RS485 serial communication chip is connected with the communication controler in data memory module;
Main control chip is CPLD chip;
Usb communication chip is made up of the EZ_USB FX2LP series monolithic of Cypress company.
Another technical scheme of the present invention is, a kind of acquisition method of high-voltage IGBT module real-time data synchronization acquisition system, adopt high-voltage IGBT module real-time data synchronization acquisition system, its structure is: comprise data acquisition module, data acquisition module is connected with data memory module by optical fiber, and data memory module is connected with data transmission module again; Data acquisition module comprises main control chip, main control chip is embedded with data encoder and A/D controller, data encoder connects A/D converter and fiber optic transmitter A respectively, the data that A/D converter is changed by data encoder are carried out encoding and to be sent by fiber optic transmitter A, A/D controller is connected with A/D converter with fiber optic receiver B respectively, control the analog-digital conversion that A/D converter carries out data under the control of the synchronizing clock signals that A/D controller sends at fiber optic receiver B, A/D converter is also connected with data conditioning circuit;
Data memory module comprises FPGA control chip, is provided with access control in FPGA control chip, address control unit, phase-locked loop pll, clock chip controller, fiber data processor, SDRAM read-write controller, FLASH read-write controller and communication controler, access control, address control unit respectively with clock chip controller, fiber data processor, SDRAM read-write controller, FLASH read-write controller, communication controler connects, data memory module also comprises fiber optic receiver A, fiber optic receiver A is connected with fiber data processor, fiber optic receiver A gives fiber data processor after receiving the coded data from an optical fiber and carries out data decode, clock chip is connected with clock chip controller, SDRAM storer is connected with SDRAM read-write controller, FLASH memory is connected with FLASH read-write controller, fiber optic transmitter B is connected with phase-locked loop pll, and the synchronizing clock signals that phase-locked loop pll produces by fiber optic transmitter B is sent to data acquisition module by another root optical fiber,
Data transmission module comprises usb communication chip, and usb communication chip is connected with host computer, and usb communication chip is connected with the communication controler in data memory module;
Or data transmission module comprises RS485 serial communication chip, RS485 serial communication chip is connected with GPRS wireless communication module and radio receiving terminal successively, and RS485 serial communication chip is connected with the communication controler in data memory module,
Concrete acquisition method is implemented according to following steps:
Step 1: the phase-locked loop pll in data memory module produces synchronizing clock signals, gives each data acquisition module, for each data acquisition module provides synchronizing clock signals to carry out the synchronous acquisition of data via fiber optic transmitter B by an Optical Fiber Transmission;
Step 2: the grid voltage of each data acquisition module Real-time Collection IGBT module, collector-transmitting voltage across poles V
ce, collector current, longitude and latitude, speed simulation parameter, the parameter signal collected is transformed into the simulating signal that A/D converter accepts by data conditioning circuit, A/D converter realizes simulating signal to be converted to digital signal, data encoder is to encoding digital signals, and fiber optic transmitter A imports coded data into data memory module by an optical fiber again;
Step 3: the fiber optic receiver A in data memory module receives the coded data that in data acquisition module, fiber optic transmitter A spreads out of, fiber data processor is decoded to coded data, SDRAM read-write controller is in access control, under the cooperation of address control unit, the data of decoding are stored in SDRAM storer, realize the collection to data in IGBT module, clock chip realizes the reading to clock information under the effect of clock chip controller simultaneously, clock signal is imported into the fiber optic receiver B in data acquisition module by fiber optic transmitter B by another root optical fiber, clock signal is input to A/D converter by A/D controller by fiber optic receiver B, clock information is provided, realize data acquisition module and data memory module data message is synchronous,
When access control, address control unit detect that IGBT module breaks down, the IGBT module fault first 5 seconds data readings will be buffered in SDRAM storer under the cooperation of SDRAM read-write controller, and under the cooperation of FLASH read-write controller, data are stored in FLASH memory;
Step 4: when communication controler receives the transmission request of data transmission module, the fault data be stored in FLASH memory is sent to host computer or radio receiving terminal by usb communication chip or GPRS wireless communication module, realizes the collection to fault data in IGBT module.
The invention has the beneficial effects as follows, high-voltage IGBT module real-time data synchronization acquisition system provided by the invention can solve between each acquisition module of IGBT module intelligent monitor system and the synchronous acquisition of data acquisition module and the mutually isolated and each channel data of data memory module, the mismatch problem between acquisition speed and memory speed can be solved simultaneously, achieve reliable collection and the storage of system, realize the voltage levels isolation of driving side and storage side, system failure information is stored, subsequent analysis for product provides data accurately, improve design and the quality of production of IGBT module.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of high-voltage IGBT module real-time data synchronization of the present invention acquisition system;
Fig. 2 is data acquisition module frame diagram in a kind of high-voltage IGBT module real-time data synchronization of the present invention acquisition system;
Fig. 3 is data memory module frame diagram in a kind of high-voltage IGBT module real-time data synchronization of the present invention acquisition system;
Fig. 4 is data transmission module frame diagram in a kind of high-voltage IGBT module real-time data synchronization of the present invention acquisition system.
In figure, 1. data acquisition module, 11. main control chips, 111. data encoder, 112.A/D controller, 12.A/D converter, 13. data conditioning circuit, 14. fiber optic transmitter A, 15. fiber optic receiver B, 2. optical fiber, 3. data memory module, 31.FPGA control chip, 311. clock chip controllers, 312. fiber data processors, 313. phase-locked loop pll, 314.SDRAM read-write controller, 315.FLASH read-write controller, 316. access control, address control unit, 317. communication controler, 32. clock chips, 33. fiber optic receiver A, 34. fiber optic transmitter B, 35.SDRAM storer, 36.FLASH storer, 4. data transmission module, 41.USB communication chip, 42.RS485 serial communication chip, 43.GPRS wireless communication module.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is described in detail.
A kind of high-voltage IGBT module real-time data synchronization acquisition system provided by the invention, comprise multiple data acquisition module 1, each data acquisition module 1 is connected with data memory module 3 by two optical fiber 2, and data memory module 3 is connected with data transmission module 4 again;
The wherein optical fiber 2 be connected with each data acquisition module 1 for transfer encoding data, the transmission carrying out coded data by optical fiber 2 to realize between each data acquisition module 1 and between data acquisition module 1 and data memory module 3 up to the isolation of 10KV;
The other optical fiber 2 be connected with each data acquisition module 1 for transmitting synchronous clock signal, the transmission carrying out synchronizing clock signals by optical fiber 2 realize mutually isolated between each data acquisition module 1 while ensure the synchronous acquisition of data;
Wherein data acquisition module 1 comprises main control chip 11, main control chip 11 is CPLD chips, main control chip 11 is embedded with data encoder 111 and A/D controller 112, data encoder 111 connects A/D converter 12 and fiber optic transmitter A14 respectively, the data that A/D converter 12 is changed by data encoder 111 are carried out encoding and to be sent by fiber optic transmitter A14, A/D controller 112 is connected with A/D converter 12 with fiber optic receiver B15 respectively, the analog-digital conversion that A/D converter 12 carries out data is controlled under the control of the synchronizing clock signals that A/D controller 112 sends at fiber optic receiver B15, A/D converter 12 is also connected with data conditioning circuit 13,
Wherein data memory module 3 comprises FPGA control chip 31, access control is provided with in FPGA control chip 31, address control unit 316, phase-locked loop pll 313, clock chip controller 311, fiber data processor 312, SDRAM read-write controller 314, FLASH read-write controller 315 and communication controler 317, access control, address control unit 316 respectively with clock chip controller 311, fiber data processor 312, SDRAM read-write controller 314, FLASH read-write controller 315, communication controler 317 connects, data memory module 3 also comprises fiber optic receiver A33, fiber optic receiver A33 is connected with fiber data processor 312, fiber optic receiver A33 gives fiber data processor 312 after receiving the coded data from an optical fiber 2 and carries out data decode, clock chip 32 is connected with clock chip controller 311, SDRAM storer 35 is connected with SDRAM read-write controller 314, FLASH memory 36 is connected with FLASH read-write controller 315, the synchronizing clock signals that phase-locked loop pll 313 produces by fiber optic transmitter B 34 and phase-locked loop pll 313 optical fiber connected body transmitter B 34 is sent to data acquisition module 1 by another root optical fiber 2,
Data transmission module 4 is connected with the communication controler 317 in data memory module 3.
Wherein data transmission module 4 comprises usb communication chip 41, usb communication chip 41 is connected with host computer, usb communication chip 41 is connected with the communication controler 317 in data memory module 3, usb communication chip (41) is made up of the EZ_USB FX2LP series monolithic of Cypress company, or data transmission module 4 comprises RS485 serial communication chip 42, RS485 serial communication chip 42 is connected with GPRS wireless communication module 43 and radio receiving terminal successively, RS485 serial communication chip 42 is also connected with the communication controler 317 in data memory module 3, or these two kinds of data transmission modules 4 exist simultaneously.
When high-voltage IGBT module real-time data acquisition, due to the service time normally Microsecond grade of IGBT module, in order to ensure the validity of data, as high in data demand acquisition rates such as grid voltages for the on-the-spot operation parameters for fault analysis, and will solve between acquisition speed and storage speed and there is the unmatched problem of speed, and in order to the reliable collection that realizes system and storage, need the isolation realizing driving side and store side, for high-voltage IGBT module, its isolation voltage grade reaches more than 10KV, simultaneously, the acquisition channel being in the IGBT module related data of upper and lower bridge arm must be completely isolated, and the validity of data during in order to ensure to carry out fault analysis, both again must be synchronous.So high-voltage IGBT module real-time data synchronization acquisition system of the present invention adopts the scheme of data acquisition end 1 and data storage end 3 being isolated with optical fiber 2, collection terminal adopts the stronger CPLD chip of antijamming capability to realize core and controls, the clock simultaneously data being stored end 3 to data acquisition end 1, thus ensures the Complete Synchronization of clock between mutually isolated acquisition channel by optical fiber 2 isolated transmission.
Present invention also offers the acquisition method of the high-voltage IGBT module real-time data synchronization acquisition system adopting above-mentioned acquisition system, specifically implement according to following steps:
Step 1: the phase-locked loop pll 313 in data memory module 3 produces synchronizing clock signals, is transferred to each data acquisition module 1 via fiber optic transmitter B34 by an optical fiber 2, for each data acquisition module 1 provides synchronizing clock signals to carry out the synchronous acquisition of data;
Step 2: the grid voltage of each data acquisition module 1 Real-time Collection IGBT module, collector-transmitting voltage across poles V
ce, collector current, longitude and latitude, speed simulation parameter, the parameter signal collected is transformed into the simulating signal that A/D converter 12 accepts by data conditioning circuit 13, A/D converter 12 realizes simulating signal to be converted to digital signal, data encoder 111 pairs of encoding digital signals, fiber optic transmitter A14 imports coded data into data memory module 3 by an optical fiber 2 again;
Step 3: the fiber optic receiver A33 in data memory module 3 receives the coded data that in data acquisition module 1, fiber optic transmitter A14 spreads out of, fiber data processor 312 pairs of coded datas are decoded, SDRAM read-write controller 314 is in access control, under the cooperation of address control unit 316, the data of decoding are stored in SDRAM storer 35, realize the collection to data in IGBT module, clock chip 32 realizes the reading to clock information under the effect of clock chip controller 311 simultaneously, clock signal is imported into the fiber optic receiver B15 in data acquisition module 1 by fiber optic transmitter B34 by another root optical fiber 2, clock signal is input to A/D converter 12 by A/D controller 112 by fiber optic receiver B15, clock information is provided, realize data acquisition module 1 and data memory module 3 data message is synchronous,
When access control, address control unit 316 detect that IGBT module breaks down, the IGBT module fault first 5 seconds data readings will be buffered in SDRAM storer 35 under the cooperation of SDRAM read-write controller 314, and under the cooperation of FLASH read-write controller 315, data are stored in FLASH memory 36;
Step 4: when communication controler 317 receives the transmission request of data transmission module 4, the fault data be stored in FLASH memory 36 is sent to host computer or radio receiving terminal by usb communication chip 41 or GPRS wireless communication module 43, realizes the collection to fault data in IGBT module.
Step 1 in the acquisition method of above-mentioned high-voltage IGBT module real-time data synchronization acquisition system achieves the collection of data and is transformed to digital signal, carried by optical fiber 2, the transfer efficiency of optical fiber 2 is high, and can high-effect long distance conveying be carried out, step 2 achieves the storage of data message, make simultaneously image data and storage data synchronous, avoid the unmatched phenomenon of information, failure message stores by step 3, and step 4 is by realizing the collection to fault data in IGBT module by usb communication chip 41 or GPRS wireless communication module 43.
The present invention adopts the method for Fiber isolation to realize the synchronous of different interchannel data acquisition by clock signal data being stored end and collection terminal, ensure the Complete Synchronization solving clock between the mutually isolated acquisition channel of IGBT module intelligent monitor system, the mismatch problem between acquisition speed and memory speed can be solved simultaneously, achieve reliable collection and the storage of system, realize the voltage levels isolation of driving side and storage side, when a fault has occurred, fault data information can be extracted, the failure message gathered is processed, the reason of analysis of failure also carries out fault diagnosis, like this for the subsequent analysis of product provides data accurately, there is provided strong data message for improving the quality of products simultaneously.
Claims (8)
1. a high-voltage IGBT module real-time data synchronization acquisition system, it is characterized in that, comprise multiple data acquisition module (1), each data acquisition module (1) is connected with data memory module (3) by two optical fiber (2), and described data memory module (3) is connected with data transmission module (4) again;
The wherein optical fiber (2) be connected with each data acquisition module (1) for transfer encoding data, the transmission carrying out coded data by optical fiber (2) to realize between each data acquisition module (1) and between data acquisition module (1) and data memory module (3) up to the isolation of 10KV;
The other optical fiber (2) be connected with each data acquisition module (1) for transmitting synchronous clock signal, the transmission carrying out synchronizing clock signals by optical fiber (2) realize mutually isolated between each data acquisition module (1) while ensure the synchronous acquisition of data.
2. a kind of high-voltage IGBT module real-time data synchronization acquisition system according to claim 1, it is characterized in that, described data acquisition module (1) comprises main control chip (11), main control chip (11) is embedded with data encoder (111) and A/D controller (112), data encoder (111) connects A/D converter (12) and fiber optic transmitter A (14) respectively, the data that A/D converter (12) is changed are carried out encoding and to be sent by fiber optic transmitter A (14) by data encoder (111), described A/D controller (112) is connected with A/D converter (12) with fiber optic receiver B (15) respectively, the analog-digital conversion that A/D converter (12) carries out data is controlled under the control of the synchronizing clock signals that A/D controller (112) sends at fiber optic receiver B (15), described A/D converter (12) is also connected with data conditioning circuit (13).
3. a kind of high-voltage IGBT module real-time data synchronization acquisition system according to claim 1, it is characterized in that, described data memory module (3) comprises FPGA control chip (31), FPGA control chip is provided with access control in (31), address control unit (316), phase-locked loop pll (313), clock chip controller (311), fiber data processor (312), SDRAM read-write controller (314), FLASH read-write controller (315) and communication controler (317), described access control, address control unit (316) respectively with clock chip controller (311), fiber data processor (312), SDRAM read-write controller (314), FLASH read-write controller (315), communication controler (317) connects, data memory module (3) also comprises fiber optic receiver A (33), fiber optic receiver A (33) is connected with fiber data processor (312), fiber optic receiver A (33) gives fiber data processor (312) after receiving the coded data from an optical fiber (2) and carries out data decode, clock chip (32) is connected with clock chip controller (311), SDRAM storer (35) is connected with SDRAM read-write controller (314), FLASH memory (36) is connected with FLASH read-write controller (315), fiber optic transmitter B (34) is connected with phase-locked loop pll (313), the synchronizing clock signals that phase-locked loop pll (313) produces by fiber optic transmitter B (34) is sent to data acquisition module (1) by another root optical fiber (2),
Described data transmission module (4) is connected with the communication controler (317) in data memory module (3).
4. a kind of high-voltage IGBT module real-time data synchronization acquisition system according to claim 1, it is characterized in that, described data transmission module (4) comprises usb communication chip (41), usb communication chip (41) is connected with host computer, and described usb communication chip (41) is connected with the communication controler (317) in data memory module (3).
5. a kind of high-voltage IGBT module real-time data synchronization acquisition system according to claim 4, is characterized in that, described usb communication chip (41) is made up of the EZ_USB FX2LP series monolithic of Cypress company.
6. a kind of high-voltage IGBT module real-time data synchronization acquisition system according to claim 1, it is characterized in that, described data transmission module (4) comprises RS485 serial communication chip (42), RS485 serial communication chip (42) is connected with GPRS wireless communication module (43) and radio receiving terminal successively, and RS485 serial communication chip (42) is connected with the communication controler (317) in data memory module (3).
7. a kind of high-voltage IGBT module real-time data synchronization acquisition system according to any one of claim 1-6, is characterized in that, described main control chip (11) is CPLD chip.
8. a high-voltage IGBT module real-time data synchronization acquisition method, it is characterized in that, adopt high-voltage IGBT module real-time data synchronization acquisition system, its structure is: comprise multiple data acquisition module (1), each data acquisition module (1) is connected with data memory module (3) by two optical fiber (2), and described data memory module (3) is connected with data transmission module (4) again;
Described data acquisition module (1) comprises main control chip (11), main control chip (11) is embedded with data encoder (111) and A/D controller (112), data encoder (111) connects A/D converter (12) and fiber optic transmitter A (14) respectively, the data that A/D converter (12) is changed are carried out encoding and to be sent by fiber optic transmitter A (14) by data encoder (111), A/D controller (112) is connected with A/D converter (12) with fiber optic receiver B (15) respectively, the analog-digital conversion that A/D converter (12) carries out data is controlled under the control of the synchronizing clock signals that A/D controller (112) sends at fiber optic receiver B (15), described A/D converter (12) is also connected with data conditioning circuit (13),
Described data memory module (3) comprises FPGA control chip (31), FPGA control chip is provided with access control in (31), address control unit (316), phase-locked loop pll (313), clock chip controller (311), fiber data processor (312), SDRAM read-write controller (314), FLASH read-write controller (315) and communication controler (317), described access control, address control unit (316) respectively with clock chip controller (311), fiber data processor (312), SDRAM read-write controller (314), FLASH read-write controller (315), communication controler (317) connects, data memory module (3) also comprises fiber optic receiver A (33), fiber optic receiver A (33) is connected with fiber data processor (312), fiber optic receiver A (33) gives fiber data processor (312) after receiving the coded data from an optical fiber (2) and carries out data decode, clock chip (32) is connected with clock chip controller (311), SDRAM storer (35) is connected with SDRAM read-write controller (314), FLASH memory (36) is connected with FLASH read-write controller (315), fiber optic transmitter B (34) is connected with phase-locked loop pll (313), the synchronizing clock signals that phase-locked loop pll (313) produces by fiber optic transmitter B (34) is sent to data acquisition module (1) by another root optical fiber (2),
Described data transmission module (4) comprises usb communication chip (41), usb communication chip (41) is connected with host computer, described usb communication chip (41) is connected with the communication controler (317) in data memory module (3)
Or described data transmission module (4) comprises RS485 serial communication chip (42), RS485 serial communication chip (42) is connected with GPRS wireless communication module (43) and radio receiving terminal successively, RS485 serial communication chip (42) is connected with the communication controler (317) in data memory module (3)
Concrete acquisition method is implemented according to following steps:
Step 1: the phase-locked loop pll (313) in data memory module (3) produces synchronizing clock signals, each data acquisition module (1) is transferred to by an optical fiber (2), for each data acquisition module (1) provides synchronizing clock signals to carry out the synchronous acquisition of data via fiber optic transmitter B (34);
Step 2: the grid voltage of each data acquisition module (1) synchronous Real-time Collection IGBT module under the control of synchronizing clock signals, collector-transmitting voltage across poles V
ce, collector current, longitude and latitude, speed simulation parameter, the parameter signal collected is transformed into the simulating signal that A/D converter (12) accepts by data conditioning circuit (13), A/D converter (12) realizes simulating signal to be converted to digital signal, data encoder (111) is to encoding digital signals, and fiber optic transmitter A (14) imports coded data into data memory module (3) by an optical fiber (2) again;
Step 3: the fiber optic receiver A (33) in data memory module (3) receives the coded data that in data acquisition module (1), fiber optic transmitter A (14) spreads out of, fiber data processor (312) is decoded to coded data, SDRAM read-write controller (314) is in access control, the data of decoding are stored in SDRAM storer (35) under the cooperation of address control unit (316), realize the collection to data in IGBT module, clock chip (32) realizes the reading to clock information under the effect of clock chip controller (311) simultaneously, clock signal is imported into the fiber optic receiver B (15) in data acquisition module (1) by fiber optic transmitter B (34) by another root optical fiber (2), clock signal is input to A/D converter (12) by A/D controller (112) by fiber optic receiver B (15), clock information is provided, realize data acquisition module (1) and data memory module (3) data message is synchronous,
When access control, address control unit (316) detect that IGBT module breaks down, the IGBT module fault first 5 seconds data readings in SDRAM storer (35) will be buffered under the cooperation of SDRAM read-write controller (314), and data be stored in FLASH memory (36) under the cooperation of FLASH read-write controller (315);
Step 4: when communication controler (317) receives the transmission request of data transmission module (4), the fault data be stored in FLASH memory (36) is sent to host computer or radio receiving terminal by usb communication chip (41) or GPRS wireless communication module (43), realizes the collection to fault data in IGBT module.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106681179A (en) * | 2015-11-10 | 2017-05-17 | 北京精微智能科技有限公司 | Real-time synchronization data acquisition device |
| CN113691955A (en) * | 2021-08-26 | 2021-11-23 | 广州市微生物研究所有限公司 | Detection data communication method and system for air purifier |
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| CN106681179A (en) * | 2015-11-10 | 2017-05-17 | 北京精微智能科技有限公司 | Real-time synchronization data acquisition device |
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| CN115278458A (en) * | 2022-07-25 | 2022-11-01 | 邓剑辉 | Multi-channel digital audio processing system based on PCIE interface |
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