CN100385787C - DSP Chip-based excitation controller communication system and its method for realizing USB protocol - Google Patents
DSP Chip-based excitation controller communication system and its method for realizing USB protocol Download PDFInfo
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- CN100385787C CN100385787C CNB2005101223012A CN200510122301A CN100385787C CN 100385787 C CN100385787 C CN 100385787C CN B2005101223012 A CNB2005101223012 A CN B2005101223012A CN 200510122301 A CN200510122301 A CN 200510122301A CN 100385787 C CN100385787 C CN 100385787C
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Abstract
The present invention relates to an excitation controller communication system based on a DSP chip and a method thereof for realizing a USB protocol. The present invention is characterized in that the excitation controller communication system is based on a control chip TMS32OF2812 with high performance as a core processor; a flexible and convenient CH375 is used as a USB communication control chip; application software of an upper machine with perfect and abundant functions is used as a man-machine interface. The superiority and technical effects of the present invention lie in that various and complex control laws of generator excitation are realized by using a digital signal processing chip with high performance; the accuracy and the speed of the excitation system are enhanced; the abundant communication functions are realized by the flexible USB interface and the application software of the upper machine with complete functions. The realized communication functions comprise that system oscillation, system frequency mutations, and current and voltage change in system dynamic processes, which are caused by various broken faults in a generator, are continuously recorded without pretermission; a real-time voltage-current curve is analyzed to directly obtain a reliability report of the present operating state by using analysis software.
Description
(1) technical field:
The invention belongs to the motor automatic field, particularly a kind of method that realizes based on the excitation controller communication system and the usb protocol thereof of dsp chip.
(2) technical background
Motor automation control is the key areas of Automation of Electric Systems, and the operation conditions of whole electric power system is had material impact.Well behaved excitation controlling device not only can guarantee the reliability and stability of generator operation, generation current machine control theory adopts linear control theory more, core texture mostly is 8 or 16 single-chip microcomputers, communication interface mostly is the RS232 serial communication, and generator itself is a non linear system, therefore the nonlinear Control effect often can not be satisfactory, here Yi Fangmian reason is that the core texture that adopts mostly is single-chip microcomputer, arithmetic speed and precision are limited, add the time delay of peripheral hardware, be difficult to realize the control theory of various complexity, on the other hand, original excitation controller communication system because the RS232 that adopts more, speed is limited, and agreement is simple, is difficult to realize complicated transfer function, make the monitoring and the analysis means of generator operation situation limited, thereby reduced the runnability of generator.
(3) summary of the invention:
The object of the present invention is to provide a kind of method that realizes based on the excitation controller communication system and the usb protocol thereof of dsp chip, it can at first utilize high-powered DSP to realize the high accuracy and the fast processing of signal, pass through USB communication channel flexibly then, various data are required to be transferred to host computer according to difference, host computer is realized monitoring and analytic function to the generator operation situation by application software: realize the system oscillation that causes because of various open circuit faults in the recording occurring continuously generator exhaustively, the electric current and the change in voltage of system frequency sudden change and system dynamic course; Can directly draw the reliability report of existing operating state by the real-time voltage-current curve of analysis software.
Technical scheme of the present invention: a kind of excitation controller communication system based on dsp chip, comprise signal acquisition circuit, the host computer of excitation system and slave computer, it is characterized in that said host computer is by USB interface-based PC workbench, said slave computer is based on the generator excitation controller of dsp chip, according to the USB control chip, realize its transfer of data between host computer and slave computer.
Above-mentioned said signal acquisition circuit is by voltage-current sensor, and electric current AC sampling front-end circuit is formed; After handling voltage, the current signal gathered, the AC sampling front-end circuit sends into the A/D module input in the central data treatment circuit.
Above-mentioned said slave computer is meant with DSP to be the excitation controller of core, and excitation controller is put into designated storage area by signal acquisition circuit and internal digital signal handler with the significant data of computing gained, is used for the exchanges data with host computer.
Above-mentioned said USB control chip refers to by parallel data line and links to each other with slave computer, and links to each other with host computer with communication cable by USB interface, realizes the conversion chip of the USB form transmission of the data between host computer and the slave computer.Slave computer is by data wire, and address strobe line and other boost lines link to each other with the USB control chip.
A kind of method that realizes based on the usb protocol of realizing in the excitation controller communication system of dsp chip between host computer and slave computer, it is characterized in that it is made of following steps: analog to digital conversion circuit is realized collection (2) the dsp chip realization operation of data processing and the storage of data on (1) front-end circuit and the sheet, and (3) slave computer end is realized protocol conversion by the USB control chip; (4) host computer is realized the Hardware I/visit of O mouth and the analyzing and processing of data by driver and application program.
Above-mentioned said step (1) front-end circuit utilizes instrument transformer with the high voltage of generator secondary side, big current conversion voltage signal among a small circle, and by further ratio discharge circuit, the small-signal of analog-to-digital conversion module on the suitable sheet that amplitude limiter circuit, filter circuit will obtain obtains the digital quantity signal of various electric current and voltages then by analog to digital conversion circuit on the sheet.
Dsp chip obtains various data with the digital quantity that analog-to-digital conversion obtains by the AC sampling algorithm in the above-mentioned said step (2), when finishing control law and being used to control output, deposit data in specified memory, as used with the host computer data communication.
Utilize the USB control chip as the intermediate protocol conversion equipment in the above-mentioned said step (3), cooperate slave computer to realize the USB host-host protocol; Slave computer is by interrupt routine, and the data that slave computer is delivered to the control chip buffering area are packaged as automatically that the Frame that meets the USB host-host protocol is sent to host computer or the frame that the host computer transmission comes resolved and obtain the actual data of wanting and be sent to slave computer.
The driver of above-mentioned said step (4) adopts WDM level type driving model, the calling interface of configuration driver and USBD bus driver at first, read the various descriptors of USB device then, obtain available configuration interface and end points, search the appropriate interface descriptor, for each interface is selected transport channel type, and set up corresponding interface descriptor mark, so that application program is communicated by letter with USB device for each interface.
The application program of above-mentioned said step (4) is carried out Win32 to equipment I/O and is called, this calls by the I/O system service and accepts, the I/O manager is from suitable I/O request package of this request structure, the I/O manager passes to the driver of hierarchy type with IRP, finally drives journey by the bottom and finishes in hardware and come into contacts with.
Operation principle of the present invention: signal acquisition circuit is generator voltage instrument transformer secondary side voltage and Current Transformer Secondary survey current transformation than the low amplitude value alternating voltage, to become that digital quantity signal sends into DSP be in the central data processor of core to analog-to-digital conversion on multidiameter option switch and sheet, central processing unit calculates the silicon controlled trigger angle to input variable by selected control law on the one hand, significant data to gained in the computational process deposits specific memory section on the one hand, make things convenient for the USB communication system to carry out access, the USB control chip is by the access of interrupt requests realization to specific memory section, realize protocol conversion by external firmware simultaneously, finish the communication in host computer, host computer is finished operation to Hardware I/O mouth by application software by calling the Win32API function.
Superiority of the present invention and technique effect are: utilize high performance control chip DSP to realize the generator excitation rule of various complexity, and combine with excitation controller by USB communication system flexibly, realize data communication flexibly at a high speed, realize by upper computer analyzing software:
(1) realizes the system oscillation that causes because of various open circuit faults in the recording occurring continuously generator exhaustively, the electric current and the change in voltage of system frequency sudden change and system dynamic course;
(2) can directly draw the reliability report of existing operating state by the real-time voltage-current curve of analysis software;
(3) by various excitation tests and simulated failure test observation electrical power system transient operation conditions, the superiority of more various control theories compares, for parameters optimization provides reference.
(4) description of drawings
General structure schematic diagram among 1 the present invention of accompanying drawing related " based on the excitation controller communication system of dsp chip and the method for usb protocol realization thereof ".
Accompanying drawing 2 is the slave computer flow chart of the present invention's related " based on the excitation controller communication system of dsp chip and method of usb protocol realization thereof ".
Accompanying drawing 3 is the present invention's related " based on the excitation controller communication system of dsp chip and method of usb protocol realization thereof " USB driver layer of structure figure.
Accompanying drawing 4 calls schematic diagram for the present invention's related " based on the excitation controller communication system of dsp chip and method of usb protocol realization thereof " device driver.
Accompanying drawing 5 is collected the front-end circuit schematic diagram for the present invention's related " based on the excitation controller communication system of dsp chip and method of usb protocol realization thereof " voltage and current signal.
(5) specific embodiments
Embodiment: a kind of excitation controller communication system based on dsp chip
It is characterized in that it the high-performance Electric Machine Control special DSP chip TMS320 F2812 of the up-to-date release of Texas Instruments be central processing unit, signals collecting leading portion circuit and A/D change-over circuit; The significant data that while DSP will calculate gained is placed on designated storage area, realize the USB firmware program by USB communication interface chip CH375, slave computer cooperates realizes the realization of USB host-host protocol, and upper computer end realizes Hardware I/visit of O mouth and the analyzing and processing of data (structural representation such as Fig. 1) by driver and application program by the position machine.
The utilization of above-mentioned said signals collecting front-end circuit is the voltage signal of 0～3V from high voltage, the big current conversion of the generator secondary side that the instrument transformer conversion comes; as Fig. 5; and utilize D11, D12, D21, D22 to constitute the input saturation protection; R24, R252, R26, R34, R35, R36, C11, C12, C16, C17 constitute the instrument transformer rc filter circuit, and the signal of gained is directly sent into 16 A/D ALT-CH alternate channels of DSP after photoelectricity is isolated.
Above-mentioned said digital signal that goes up A/D conversion gained deposits appointed buffer in, CPU carries out calculation process by the effective value of fast fourier transform calculating voltage electric current and with reference value, realize complicated control algolithm, draw next step trigger angle at last, output control controllable silicon power circuit.
A kind of implementation method of the excitation controller communication system usb protocol based on dsp chip is made up of firmware program, Single Chip Microcomputer (SCM) program, host computer driver, host computer application program step:
Writing of above-mentioned said slave computer end USB firmware program:
CH375 is ooze a kind of common interface chip that is exclusively used in usb bus of permanent company exploitation of Nanjing, underlying protocol in the USB communication that DeviceMode is built-in, have the built-in firmware mode and the external flexibly firmware mode that save trouble, under built-in firmware mode, CH375 handles all things of acquiescence breakpoint 0 automatically, and local microcontroller (referring to DSP here) is as long as be responsible for exchanges data.Under external firmware mode, by the various by oneself as required USB requests of external microcontroller.Select outside firmware mode for use at this, the DSP end need be done following work (flow chart such as Fig. 2) as requested:
(1) after DSP started, at first initialization CH375 was provided with interruption then for using the USB device pattern of outside firmware.
(2) have no progeny in DSP receives, use the GET-STATUS order to obtain interrupt status, analyzing and processing is as follows:
(1) if the OUT of end points 2 or 1 success then uses RD-USB-DATA order reading of data to reinform the main program processing.
(2) if the IN of end points 2 or 1 success then uses UNLOCK-USB buffer release district to reinform the main program processing.
(3) if RD_USB_DATA order reading of data is then used in the SETUP of end points 0 success, analyzing and processing is as follows:
1. if USB request CLEAR_FEATURE handles according to FEATURE in the request and endpoint number etc. analyses so,, can use the SET_ENDP order for ENDPOINT_HALT.
2. if USB asks GET_DESCRIPTOR, use the WR_USB_DATA3 order to return preceding 8 bytes of descriptor so, and preserve this USB request command and current descriptor counting, so that the back continues to return.
3. if USB request SET_ADDRESS preserves this USB request command so.
4. if USB request SET_CONFIG preserves the value of setting so, whether successful notice main program USB initialization is.
5. if USB request GET_CONFIG uses the WR_USB_DATA3 order to return current Configuration Values so.
6. if USB request GET_INTERFACE uses the WR_USB_DATA3 order to return current interface value so.
7. if USB request GET_STATUS uses the WR_USB_DATA3 order to return the current state value so.
8. all the other USB requests are handled as required, do not support then to use SET_ENDP2 or 3 order settings to reply and are STALL.
(4) if RD_USB_DATA order reading of data is then used in the OUT of end points 0 success, can forgo data.
(5) if the IN of end points 0 success is then handled as follows according to the USB request command of having preserved:
1. if USB request GET_DESCRIPTOR uses WR_USB_DATA3 order continuing to return residue descriptor so.
2. if USB request SET_ADDRESS uses the SET_USB_ADDR order that the USB address is set so.
3. any USB request comprises above-mentioned request, uses the UNLOCK_USB order before interruption is withdrawed from.
(6) if usb bus resets, then clear Configuration Values etc., CH375 can automatically clear USB address and synchronous triggering sign.
(7) interrupt for any one CH375, must unique corresponding UNLOCK_USB order or RD_USB_DATA order.
Writing of above-mentioned said host computer driver:
In the driver of USB device (structure chart such as Fig. 3), take the WDM structure of Microsoft equally, exploitation WDM driver has two kinds of methods, a kind of 98DDK and 2000DDK Driver Development bag that utilizes Microsoft to provide, another kind is the specific drivers developing instrument, as the DriverStudio of CompuWare NUMEGA company and the WinDriver of JUNGO company.
For the ooze CH375USB control chip of permanent company of Nanjing, method is directly to revise the source code of its general driving program the most fast, recompilates with the DDK of Windows and generates own required driving routine.The general driving program of CH375 has possessed itself to be explained the global function of the I/O control code of control transmission, bulk transfer, interruption transmission etc.
For the ooze CH375USB control chip of permanent company of Nanjing, method is directly to revise the source code of its general driving program the most fast, recompilates with the DDK of Windows and generates own required driving routine.The general driving program of CH375 has possessed itself to be explained the global function of the I/O control code of control transmission, bulk transfer, interruption transmission etc.
Writing of above-mentioned said host computer application program:
Application program is carried out Win32 to equipment I/O and is called (as Fig. 4), this has called the I/O system service and has accepted, the I/O manager is from suitable I/O request package of this request structure, and the I/O manager passes to the driver of hierarchy type with IRP, finally drives journey by the bottom and finishes in hardware and come into contacts with.
CH375 provides Applied layer interface at computer terminal, and Applied layer interface is the API towards the function application that is provided by the CH375 dynamic link library (DLL), and all API have mode of operation to return after calling, but not necessarily reply data are arranged.
The API that the CH375 dynamic link library provides comprises: equipment control API, transfer of data API, Interrupt Process API.
Simultaneously, utilize VC++ that Microsoft provides and MFC frame clsss function to realize various demonstrations: to comprise real-time curve display voltage current data, active power and reactive power cyclic curve to data; Realize the system oscillation that causes because of various open circuit faults in the recording occurring continuously generator exhaustively, the electric current and the change in voltage of system frequency sudden change and system dynamic course; Can directly draw the reliability report of existing operating state by the real-time voltage-current curve of analysis software.
Claims (10)
1. excitation controller communication system based on dsp chip, the host computer and the slave computer that comprise signal acquisition circuit and excitation system, it is characterized in that said host computer is based on the PC workbench of USB interface, said slave computer is based on the generator excitation controller of dsp chip, according to the USB control chip, realize its transfer of data between host computer and slave computer.
2. according to the said a kind of excitation controller communication system of claim 1, it is characterized in that said signal acquisition circuit is made up of voltage-current sensor and AC sampling front-end circuit based on dsp chip; After handling voltage, the current signal gathered, the AC sampling front-end circuit sends into the A/D module input in the central data treatment circuit.
3. according to the said a kind of excitation controller communication system of claim 1 based on dsp chip, it is characterized in that said host computer is meant outfit driver and application software and mobile PC that support the communication of USB mouth, PC provides the application platform as the visit slave computer, equipment I/O is carried out Win32 to be called, by the I/O system IRP is passed to the driver of hierarchy type, finally drive journey and finish driving hardware by the bottom.
4. according to the said a kind of excitation controller communication system of claim 1 based on dsp chip, it is characterized in that it is the excitation controller of core that said slave computer is meant with DSP, excitation controller is put into designated storage area by signal acquisition circuit and internal digital signal handler with the significant data of computing gained, is used for the exchanges data with host computer.
5. according to the said a kind of excitation controller communication system of claim 1 based on dsp chip, it is characterized in that said USB control chip refers to by parallel data line links to each other with slave computer, and link to each other with host computer with communication cable by USB interface, realize the conversion chip of the USB form transmission of the data between host computer and the slave computer, slave computer links to each other with the USB control chip by data wire, address strobe line and other boost lines.
6. method that realizes based on the usb protocol of realizing in the excitation controller communication system of dsp chip between host computer and slave computer is characterized in that it is made of following steps:
First step: analog to digital conversion circuit is realized the collection of data on front-end circuit and the sheet;
Second step: dsp chip realizes that operation of data is handled and storage;
Third step: the slave computer end is realized protocol conversion by the USB control chip;
The 4th step: host computer is realized the Hardware I/visit of O mouth and the analyzing and processing of data by driver and application program.
7. according to the said a kind of method that realizes based on the usb protocol of realizing in the excitation controller communication system of dsp chip between host computer and slave computer of claim 6, it is characterized in that front-end circuit in the said first step utilizes instrument transformer that the high voltage of generator secondary side, big current conversion are among a small circle voltage signal, and obtain being fit to the small voltage signal of analog-to-digital conversion module on the sheet by further ratio discharge circuit, amplitude limiter circuit, filter circuit, obtain the digital quantity signal of various electric current and voltages then by analog to digital conversion circuit on the sheet.
8. according to the said a kind of method that realizes based on the usb protocol of realizing in the excitation controller communication system of dsp chip between host computer and slave computer of claim 6, it is characterized in that dsp chip obtains various data with the digital quantity that analog-to-digital conversion obtains by the AC sampling algorithm in said second step, when finishing control law and being used to control output, deposit data in specified memory, as used with the host computer data communication.
9. according to the said a kind of method that realizes based on the usb protocol of realizing in the excitation controller communication system of dsp chip between host computer and slave computer of claim 6, it is characterized in that utilizing in the said third step USB control chip as the intermediate protocol conversion equipment, cooperate slave computer to realize the USB host-host protocol; Slave computer is by interrupt routine, and the data that slave computer is delivered to the control chip buffering area are packaged as automatically that the Frame that meets the USB host-host protocol is sent to host computer or the frame that the host computer transmission comes resolved and obtain the actual data of wanting and be sent to slave computer.
10. according to the said a kind of method that realizes based on the usb protocol of realizing in the excitation controller communication system of dsp chip between host computer and slave computer of claim 6, it is characterized in that the driver in said the 4th step adopts WDM level type driving model, the calling interface of configuration driver and USBD bus driver at first, read the various descriptors of USB device then, obtain available configuration interface and end points, search the appropriate interface descriptor, for each interface is selected transport channel type, and set up corresponding interface descriptor mark, so that application program is communicated by letter with USB device for each interface; Application program in said the 4th step is carried out Win32 to equipment I/O and is called, and by the I/O system IRP is passed to the driver of hierarchy type, finally drives journey by the bottom and finishes driving to hardware.
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| CNB2005101223012A CN100385787C (en) | 2005-12-12 | 2005-12-12 | DSP Chip-based excitation controller communication system and its method for realizing USB protocol |
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| CN100385787C true CN100385787C (en) | 2008-04-30 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5456434B2 (en) * | 2009-10-22 | 2014-03-26 | ルネサスエレクトロニクス株式会社 | Pipe arbitration circuit, pipe arbitration method |
| CN103412510A (en) * | 2013-06-26 | 2013-11-27 | 国家电网公司 | Method for transmitting data of generator excitation regulator to intelligent power station |
| CN106707851A (en) * | 2016-12-06 | 2017-05-24 | 上海纳信实业有限公司 | Excitation control system data recorder based on dual-core DSP |
| CN107147855A (en) * | 2017-05-11 | 2017-09-08 | 中国电子科技集团公司第四十四研究所 | The vertical time sequence driving circuits of the adjustable CCD of level state |
| JP2019040435A (en) * | 2017-08-25 | 2019-03-14 | アズビル株式会社 | Controller and deteriorated position detection method |
| CN110445676B (en) * | 2019-07-23 | 2023-04-18 | 深圳和而泰智能控制股份有限公司 | Data monitoring system, method and device and computer readable storage medium |
| CN111176157A (en) * | 2019-12-25 | 2020-05-19 | 联合汽车电子有限公司 | Monitoring method of controller |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5550455A (en) * | 1994-10-26 | 1996-08-27 | Sundstrand Corporation | Standby generator pulse excitation system and electric power generating system for use therein |
| CN1545203A (en) * | 2003-11-12 | 2004-11-10 | 中国石化集团天津石油化工公司 | Motor non-linear excitation control device based on DSP chip |
| CN2850141Y (en) * | 2005-12-12 | 2006-12-20 | 天津理工大学 | USB communication apparatus of generator excitation controller based on DSP chip |
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2005
- 2005-12-12 CN CNB2005101223012A patent/CN100385787C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5550455A (en) * | 1994-10-26 | 1996-08-27 | Sundstrand Corporation | Standby generator pulse excitation system and electric power generating system for use therein |
| CN1545203A (en) * | 2003-11-12 | 2004-11-10 | 中国石化集团天津石油化工公司 | Motor non-linear excitation control device based on DSP chip |
| CN2850141Y (en) * | 2005-12-12 | 2006-12-20 | 天津理工大学 | USB communication apparatus of generator excitation controller based on DSP chip |
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