CN109933036A - A kind of centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module - Google Patents
A kind of centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module Download PDFInfo
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Abstract
The invention belongs to electrical equipment automated networks to monitor control technology field, and in particular to a kind of centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module.Include: power module, provides power supply for other modules；Analogue collection module is acquired industry spot analog signals；Switching value acquisition module is acquired the relay signal of industry spot；Outer memory module, for storing failure wave-recording data obtained；CAN communication module, the data for collection site CAN node device；485 communication modules, for uploading the data of live CAN node device.The present invention is applied to uranium enrichment and is centrifuged engineering high-power intermediate frequency power supply power supply monitoring field, it is used for the first time in the more complex centrifugation engineering site of electromagnetic environment, not only solves the Centralized Monitoring of field device electrical parameter, the monitoring for realizing power device cooling water flow parameter simultaneously realizes the purpose of centrifugation engineering electrical equipment centralized monitor and the purpose of site safety stable operation.
Description
Technical field
The invention belongs to electrical equipment automated networks to monitor control technology field, and in particular to a kind of centrifuge medium frequency electric
Source system comprehensive parameters network monitoring module.
Background technique
The end of the sixties, American-European some engineers and technicians start computer application to for pyroelectric monitor system.Due to
Early stage computer performance is poor, so being not being met for the real-time of pyroelectric monitor system.But with the birth of integrated circuit and
Development, computer performance are greatly enhanced, and price is also lowered therewith, so that computer system enters Industry Control step by step
Field, and there are some power supply system comprehensive automation schemes with detection, protection, control and communication function.German west
Door subsidiary has designed and developed out the unattended monitoring system of electric substation of LSA678 in 1985.With the hair of automatic technology
Exhibition, external some well-known electrical manufacturers for example Siemens, Schneider, it is general produced a series of multifunction protection relays,
And be used on distribution wire and power transmission line and protect, control and monitor, such equipment usually has an overcurrent, over-voltage, power and
The defencive functions such as phase sequence.In addition to this, such equipment is also integrated with communication interface and communications protocol.
China starts late to the Remote Monitoring Technology research of power supply system, but with the development of domestic the relevant technologies,
China scientific research personnel also researching and designing gone out it is some be suitable for China it is industrial for pyroelectric monitor system.Currently, domestic existing
Many Automation Co., Ltd start to study for pyroelectric monitor system, and have developed corresponding product and put into and used it
In.
In uranium enrichment centrifugal stage alliance electricity, high-power Intermediate frequency power supply system device quantity is more, mostly powered with region division based on,
The intermediate frequency power supply power supply unit of every intermediate frequency power supply and 2 unit section powering shelf composition complete sets, every 5 sets of Intermediate frequency power supply systems dress
It sets and is combined into a complete power supply area.Due in the centrifugation cascade system of electromagnetic environment complexity, high-power intermediate frequency power supply
Using device for high-power power electronic as major loop, these devices generate a large amount of heat during the work time to be made device
Its Temperature fall carries out cooling processing to it frequently with deionization cooling water in engineering, this does not require power supply during the work time not
The electric parameters such as monitoring voltage, electric current, output frequency are only needed, it secondly need to can to real-time monitorings such as cooling water flow, water temperatures
Guarantee the stability of power work.
Summary of the invention
The purpose of the present invention is to provide a kind of centrifuge intermediate frequency power supply system comprehensive parameters network monitoring modules, to meet
The demand.
In order to achieve the above objectives, the technical solution used in the present invention are as follows:
A kind of centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module, comprising: power module mentions for other modules
Power supply source；Analogue collection module is acquired industry spot analog signals；Switching value acquisition module, to industry spot
Relay signal be acquired；Outer memory module, for storing failure wave-recording data obtained；CAN communication module is used
In the data of collection site CAN node device；485 communication modules, for uploading the data of live CAN node device.
The power module design is as follows: golden rising Yang VRB_4824LD-20WR2 switch power module is selected, by+48V
It is converted to+24V to be exported, maximum provides the output power of 20W, and transfer efficiency is up to 87%；WRA_4815S-1WR2 is selected to open
48V is converted into +/- 15V and exported by powered-down source chip, the power of maximum output 1W, and transfer efficiency is up to 75%；Select WRB_
+ 48V is converted into+5V and exported by 4805S-3W2 chip, and maximum provides 600mA electric current, and transfer efficiency is up to 74%；It selects low
Pressure difference linear voltage regulator AS1117 chip, is converted into 3.3V for 5V and exports.
The analogue collection module design is as follows: being believed using the inside AD of STM32F103R8T6 temperature and flow
Number sample quantization is carried out, which is powered using direct current 24V, water temperature information is converted into resistance signal and is exported,
Flow information is converted into current signal output；When the range of temperature of application is 0~50 DEG C, respective sensor output is electric
The variation range of resistance is 27.69k-4.167k Ω；For the resistance signal of temperature flow sensor output, design electric bridge conversion electricity
The resistance signal that sensor exports is converted into voltage signal, conversion relational expression by road are as follows: U=5 × [R/ (R+3.6)] -2.5, then
It is converted using amplifier, when there is no cut-in temperature sensor, output voltage 2.5V；Temperature when equipment operates normally
It is 25 DEG C, corresponding resistance is 10K Ω, and bridge output voltage signal is 1.18V at this time；Temperature flow sensor is by flow signal
It is converted into DC current to be exported, output current scope is 20~30mA, using two stage amplifer conversion circuit to sensor
Output current signal converted, the current signal that sensor exports is converted into voltage finally by the sampling resistor of 51 Ω
Signal, when water-cooling system operates normally, the voltage on sampling resistor is 1~1.5V.
The switching value acquisition module use relay, will all switch acquisitions filtering after carry out multi-stage light electricity every
From.
The outer memory module uses the FLASH chip of AD25DF161.
The CAN communication module design is as follows: including CAN bus transceiver and CAN controller, CAN bus is received
Device work is sent out in the physical layer of CAN bus, the binary code stream signal for that will need to send is converted into differential signal output, will
The differential signal received is converted into binary code stream and is read out, and is the bridge for connecting CAN controller and bus, CAN
Bus transceiver executes transmitting-receiving comparison, position filling, CRC check and response monitoring operation in transmission process；CAN bus control
Device works in the data link layer of CAN bus agreement, is used for delta frame, and it is sent in the form of binary code stream,
CAN controller parses the binary code stream received in receive process, and execute go to position to fill, CRC check and
Send response operation；In addition to this, CAN controller also needs to be implemented conflict judgement and error handle the multi-task；It selects
The CTM1050T CAN bus transceiver of Guangzhou Zhi Yuan company is its parallel connection two decoupling capacitor of 0.1 μ F and 10 μ F.
485 communication modules select the conversion and isolation of RSM3485CHT module realization level.
It is obtained by the present invention to have the beneficial effect that
Present invention is mainly applied to uranium enrichments to be centrifuged the dedicated high-power intermediate frequency power supply power supply monitoring field of engineering, for the first time in electricity
The more complex centrifugation engineering site of magnetic environment uses, and the application of the technology not only solves the concentration prison of field device electrical parameter
Control, while the monitoring of power device cooling water flow parameter is realized, realize centrifugation engineering dedicated electrical device Centralized Monitoring
Purpose and site safety stable operation purpose, compared to for simple electrical parameter network monitoring, the reference of the technology mentions significantly
It rises many kinds of parameters and concentrates network monitoring, be of great significance to site safety stable operation, also have one to the application of other field
It is fixed to inspire and help.The present invention realizes the monitoring of intermediate frequency power supply system water temperature and flow while monitoring voltage electric current,
Guarantee is provided for the safe operation of intermediate frequency power supply system, there is economic and social benefit well.With later production scale
Continuous expansion, high-power intermediate frequency power supply system item is increasing, and the economic benefit which is created will be more considerable.
On the one hand reference frame is provided for subsequent engineering design, on the other hand contributed share for China for the development of pyroelectric monitor field.
While the present invention realizes various electrical parameters and cooling water flow and temperature monitoring, corresponding protection is realized,
The effective safe operation for ensureing intermediate frequency power supply；The conversion plan that CAN turns 485 solves engineering site equipment bottom communication agreement
Skimble-scamble problem.The present invention is 200 sets × 6000 yuan of company's investment reduction /=120 ten thousand yuan of set；Annual component maintenance it is average at
This opposite other saves 200 sets × 2500 yuan /=50 ten thousand yuan of set；The present invention is for the first time by several parameters such as cooling water, electric parameter
Centralized Monitoring and teletransmission, and realize corresponding defencive function, have reached central controlled purpose, exploitation to other field and answer
With certain value will be brought.
The present invention has come into operation in the third stage of the project of center Lanzhou uranium enrichment Co., Ltd at present, and operational effect is good
Good, data acquisition and transmission are stablized, and have certain promotion value, and secondly the successful application of the device comprehensive to other field will join
Number transmission provides certain application value and guidance with monitoring.
Detailed description of the invention
Fig. 1 is comprehensive parameters network monitoring module circuit structure diagram；
Fig. 2 is comprehensive parameters network monitoring module power supply structure figure；
Fig. 3 is main program flow chart；
Fig. 4 is 485 communication flow figure of monitoring modular；
Fig. 5 is main field device CAN communication programme diagram；
Fig. 6 is from field device CAN communication programme diagram；
Fig. 7 is protocol converter CAN communication programme diagram；
Fig. 8 is external memory memory allocation figure；
Fig. 9 is failed storage software flow pattern.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
(1) comprehensive parameters network monitoring module and Intermediate frequency power supply system system contact
Needed in entire intermediate frequency power supply system real-time teletransmission parameter include: intermediate frequency power supply input voltage, input current,
Output voltage, output electric current, cooling water temperature and flow；Section powering shelf output voltage, output electric current, cooling water temperature and stream
Amount, for so many semaphore, general monitoring module is difficult to realize the monitoring and differentiation of the part signal, especially believes intermediate frequency
Number accuracy and real-time be of great significance for entire uranium enrichment system.
Since engineering site electromagnetic environment is complicated, equipment own power device is also easy to produce a large amount of harmonic waves, causes pole to protection
Big interference, and cannot intuitively reflect the state of cooling water.In order to accurately realize cooling protection function, and can be by intermediate frequency power supply
And all kinds of electric parameters of section cabinet are intuitively reflected into Central Control Room, to realize the purpose of network centralized monitor, design a kind of synthesis
Parameter network monitoring module, with stronger Electro Magnetic Compatibility and perfect system structure design, most using present invention investment
It is small, it is to have run the monitoring of uranium enrichment industry and the protection implement most straightforward approach, and can ensure that stablizing for intermediate frequency power supply system is transported
Capable and reliably working.
(2) module hardware circuit design
The design of module integrated circuit structure is as shown in Figure 1.
Monitoring module also needs to complete to water-cooling system temperature and flow other than needing to complete the protocol conversion of CAN to 485
Measurement, the functions such as the acquisition of live on-off model and the storage of live large electric equipment fault data.Using module
Change thought to be designed hardware circuit, the function of the realization according to needed for hardware circuit is designed to six function sub-modules:
Power module: power supply is provided for hardware circuit each unit module；Analogue collection module: industry spot analog signals are carried out
Acquisition；Switching value module: the relay signal of industry spot is acquired；Outer memory module: for storing failure wave-recording
Data obtained；CAN communication module: the data for collection site CAN node device；485 communication modules: live CAN section
The data of point device are uploaded by 485 communication interfaces.
The design of master controller:
The performance for controlling chip, decides the performance of bottom hardware system.Along with the development of integrated circuit technique, market
On there is the very high microcontroller of many cost performances, how to select a suitable microcontroller is one very arduous
Task.The present invention counts peripheral type and interface quantity that microcontroller needs from system function requirement, completes to micro-control
The type selecting of device chip processed, controller used in design need to have following peripheral hardware and interface:
1) converter: for carrying out sample quantization to analog signals such as temperature and flows.
2) CAN communication interface: hardware system passes through the data of the interface collection site intermediate frequency device controller CAN node,
To complete related data transmission and the protection implement；
3) 485 interface: to be matched with field integrated communication, what hardware system need to be collected by communication interface upload
Field data；
4) SPI interface: extension external memory realizes failure wave-recording function.
Comprehensively consider the microcontroller of mainstream on the market, the STM32F103R8T6 model of final choice Yi Fa company it is micro-
Controller.The controller has 2 12 ADC module, amounts to 16 road AD sampling channels, while also having 3 road USART communication
Interface, all the way CAN communication interface, SPI interface and multichannel can configure digital I/O port all the way.Wherein USART port can pass through electricity
Flat turn, which changes, is set to 232 or 485 ports.
The design of power module:
Industry spot only provides the direct-current switch power supply an of+48V.Needed when due to bottom hardware system worked well+
The multiple power supplies such as 24V, +/- 15V ,+5V and+3.3V, so needing to carry out level conversion to the+48V power supply of input.Carry out power supply
When design, the problems such as the main transfer efficiency for considering power supply chip, ripple and power.+ 24V power supply in hardware system is mainly used
It is powered in temperature flow sensor, the databook of reference temperature flow sensor, maximum supply current is
100mA, then power P 24=24 × 0.1 × 4=9.6W needed for+24V power supply.Temperature flow sensor requires not power supply ripple
Height, to improve power supply conversion efficiency, final choice gold rising Yang VRB_4824LD-20WR2 switch power module.The power supply chip will
+ 48V is converted to+24V and is exported, and maximum can provide the output power of 20W, and transfer efficiency is up to 87%.+/- 15V is complete in circuit
Portion powers for amplifier, and required power is relatively small, and WRA_4815S-1WR2 switching power source chip is selected when design.The chip will
48V is converted into +/- 15V and is exported, and maximum can export the power of 1W, and transfer efficiency is up to 75%.
All Digital Logical Circuits are all based on 5V's and 3.3V in the hardware system.Wherein, the sampling of temperature signal
Conditioning circuit is powered by+5V, which probably needs the electric current of 7mA.Digit chip is powered in consideration system, wherein
CTM1050T and RSM3485CHT compare power consumption, are respectively necessary for the electric current of 45~60mA and 40~100mA.As power supply instruction and
The light emitting diode of operation instruction needs 15mA electric current.Being computed 5V power supply at least needs to provide 180mA electric current, final choice WRB_
+ 48V is converted into+5V and exported by 4805S-3W2, the chip, and maximum can provide 600mA electric current, and transfer efficiency is up to 74%.
STM32F103 microcontroller is more demanding to power supply ripple, selects low pressure difference linear voltage regulator AS1117 to 5V electricity
Source carries out decompression conversion.5V is converted into being powered controller after 3.3V by the chip.This soc conversion efficiency is lower, but line
Wave is smaller.
The power supply transformational relation and power supply relationship of hardware system are as shown in Figure 2.Counnter attack is also added when carrying out power supply design
The additional devices such as diode and fuse.
The design of analogue collection module:
Analog acquisition selects temperature flow sensor to turn it mainly for the temperature and flow of water-cooling system
It changes.The sensor is powered using direct current 24V, and water temperature information is converted into resistance signal and is exported, flow information conversion
It is exported at current signal.For save the cost, sampling quantity is carried out to temperature and flow signal using the inside AD of STM32F103R8T6
Change.Because the input signal and range of the inside AD of STM32F103 are the voltage signal of 0~3.3V, design needs corresponding
Conversion circuit the output signal of sensor is converted.
When the range of temperature of application is 0~50 DEG C, the variation range of respective sensor output resistance is
27.69k-4.167kΩ.For the resistance signal of temperature flow sensor output, a kind of electric bridge conversion circuit is designed by sensor
The resistance signal of output is converted into voltage signal, conversion relational expression are as follows: U=5 × [R/ (R+3.6)] -2.5, then use amplifier will
It is converted, when there is no cut-in temperature sensor, output voltage 2.5V.Temperature is 25 DEG C of left sides when equipment operates normally
The right side, corresponding resistance are 10K Ω, and bridge output voltage signal is 1.18V at this time.
Flow signal is converted into DC current and exported by temperature flow sensor, big according to the flow of water-cooling system
Small, output current scope is 20~30mA, is turned using output current signal of the two stage amplifer conversion circuit to sensor
It changes, the current signal that sensor exports is converted into voltage signal finally by the sampling resistor of 51 Ω.When water-cooling system is normal
When operation, the voltage on sampling resistor is 1~1.5V.
The design of switching value acquisition module:
Live Intermediate frequency power supply system system reflects that the switching values such as its power supply relationship are all made of relay to complete, due to the part after
Electric appliance transmission signal is all made of light current to realize, larger to the signal interference at the complicated scene of electromagnetic environment, design process will
Multi-stage light electric isolution is carried out after all switch acquisition filtering, effectively prevents signal interference and transmission error.
The design of outer memory module:
Functions, the field devices such as the failure wave-recording for realization Intermediate frequency power supply system system extend external RAM by hardware interface,
The external memory is used to save the real time data of electrical equipment.Since the data of RAM memory are easy to lose after system is powered down
It loses, so the data loss problem that often breaks down in actual use.To solve this problem, now external by extension
FLASH stores the fault data of electrical equipment.STM32F103R8T6 microcontroller passes through SPI interface and outside FLASH
It is attached, is external memory circuit present invention employs the FLASH chip of AD25DF161.
The design of CAN communication interface:
The interface circuit of CAN bus is made of CAN bus transceiver and CAN controller.Wherein CAN bus transceiver
It works in the physical layer of CAN bus, the binary code stream signal for that will need to send is converted into differential signal output, will receive
To differential signal be converted into binary code stream and be read out, be the bridge for connecting CAN controller and bus.CAN bus transmitting-receiving
Device executes the operations such as transmitting-receiving comparison, position filling, CRC check and response monitoring in transmission process.CAN controller work
In the data link layer of CAN bus agreement, it is used for delta frame, and it is sent in the form of binary code stream；CAN bus
Controller parses the binary code stream received in receive process, and executes and position is gone to fill, and CRC check and transmission are answered
Answer equal multi-mode operations；In addition to this, CAN controller also needs to be implemented the multi-tasks such as conflict judgement and error handle.
Since STM32F103R8T6 microcontroller is integrated with CAN controller, CAN interface circuit is set in the present invention
Meter realizes there is circuit is simple and pcb board area is small etc. using which using CAN controller mode in microcontroller strap
Advantage.
CAN bus transceiver performance influences the performance of CAN interface circuit very big.Guangzhou is selected to cause in the present invention remote public
The CTM1050T CAN bus transceiver of department.The bus transceiver is powered using 3.3V, to eliminate the coupling between circuit, is considered
It is larger to transceiver power, it is its parallel connection two decoupling capacitor of 0.1 μ F and 10 μ F when design, decoupling capacitor is most in PCB layout
It measures close to chip power pin.CTM1050T bus transceiver uses full dosing technology, is internally integrated necessary to CAN-BUS and receives
Other circuits such as Power Generation Road, electrical isolation circuit and isolated from power.Chip supports the maximum communication speed for reaching 1Mbps.Have
The features such as electromagnetic radiation is low, and electromagnetism interference characteristic is good and good temp characteristic, fully meets the technical requirements of technical grade product.It should
Chip interior is also integrated with Transient Suppression Diode (TVS), for preventing bus voltage excessively high.It is set in CAN interface circuit
Following circuit details design has also been done in timing:
1) electrical isolation is carried out between controller and bus transceiver；
2) decoupling capacitance is added between the power pins and ground of chip；
3) power supply used in photoelectric isolating device both ends must carry out DC/DC isolation, otherwise will lead in electromagnetic environment complexity
Centrifugal stage the United Nations General Assembly Room influence back-end circuit steady operation；
4) 30pf capacitor is added between CAN_H, CAN_L and ground to reduce electromagnetic radiation and filter out High-frequency Interference.
The design of 485 interface modules:
Since scene generallys use the interface circuit of 485 communication modes, to make the module and the organic knot of local communication mode
Close, by STM32F013R8T6 microcontroller integrate USART communication interface, by dedicated chip be converted into 232 or
485 communication interface of person.RSM3485CHT module is selected to realize the conversion and isolation of level in the present invention.
(3) software design
Comprehensive parameters network monitoring module software mainly completes the acquisition and upload of scene CAN node data, and intermediate frequency supplies
The functions such as electric system failure wave-recording.The execution period of major cycle is 100 μ S, which passes through stopping pregnancy in timer internal
It is raw, for the stable operation for guaranteeing main program, it is desirable that major cycle internal code must execute completion in 100 μ S, for some ratios
Relatively time-consuming operation needs to be dispersed in execution in multiple periods.Main program flow is as shown in Figure 3.
After controller electrification reset, software jumps to main program execution, and main program first initializes each hardware module
And configuration, then software enters major cycle, calls the power function of modules, completes corresponding function.Controller software master
It include: temperature flow Survey Software, CAN communication software, 485 communication softwares and data storage software.
The design of 485 communication softwares:
To guarantee the consistency such as local communication agreement, hardware system is communicated using 485 buses with monitoring device, is communicated
Agreement selects Modbus agreement.Monitoring device sends read write command to module hardware system as host, by live 485 buses
And data, hardware system send response instruction and data to monitoring device as slave, by 485 buses.
The main program of hardware system is executed by the way of loop cycle.Its 485 communication program is only used as a function letter
Number is called in major cycle.In 485 communication programs, the field data collected is uploaded to monitoring and set by hardware system
It is standby.Because data volume is larger, within an execution period of main program, it is unable to complete the transmission of all data, and
The USART module of STM32F103R8T6 does not send and receive FIFO accordingly.For improve data transfer efficiency, hardware system
Data transmission is controlled using DMA.In data transmission, controller need to only start dma controller, and to corresponding mark
Position is inquired, and judges whether transmission is completed.485 communication program processes of system are as shown in Figure 4.
CAN communication software design:
CAN protocol is using live one intermediate frequency equipment of certain power supply area as CAN network host in design, remaining work of the region
For slave.All data communications are all initiated by host in CAN network, remaining equipment only receives the request of data of host
Afterwards, data transfer activities could be started, but this agreement is different from conventional master slave mode, i.e. host does not have to receive from equipment
Response data is received from the response data of the data of equipment by protocol converter, and host is same as a field device
It needs to send data to protocol converter.Protocol converter sends to host and rings after the partial data for receiving an equipment
After answering data, host to be connected to the response data, starts data next time and transmits, the major function and program of each equipment are as follows:
Main equipment controls the data transmission of whole network as the host in network, and any data in network pass
Defeated activity is all initiated by main equipment.Host, which will also be undertaken, simultaneously prevents the functions such as network lock-up.The flow chart of host such as Fig. 5 institute
Show.
For other field devices, main task is the request of data of receiving host, while sending number to protocol converter
According to.In addition to this, other field devices should also limit the sending time of itself, if data are not sent at the appointed time
Function then stops the transmission of data, prevents from conflicting with other nodes generation in bus.From the CAN communication program circuit of field device
As shown in Figure 6.
The major function of protocol converter is the data acquisition realized to field device, the protocol converter in CAN network
It is used to receive the real time data of each field device as a monitoring device, while sending response data to host.Program circuit
As shown in Figure 7.
Failure wave-recording software design:
Intermediate frequency power supply system is a mini system as composed by four sets of intermediate frequency power supply equipment in the present invention, so the system
When breaking down, need to save the voltage and current instantaneous value before four sets of intermediate frequency power supply equipment faults.By depositing for FLASH
Storage space is divided into four parts, and every part size is 4Mbit, is respectively used to the fault data of four electrical equipments of storage.
The data of storage needed for electrical equipment are counted, learn that every miniature electrical equipment includes 6 instantaneous values
Parameter, wherein each instantaneous value includes 32bit data.User requires system that can store ten groups of historical failure datas simultaneously.Often
It is 6 × 32 × 128=24576bit that platform equipment, which stores storage size required for primary fault data, and therein 128 are
The points of analog quantity.The amount of storage is much smaller than the memory space of distributed 4Mbit.But consider the need of system subsequent upgrade
It wants, when storing to fault data not by the way of Coutinuous store, but single analog quantity is stored using a sector
The storage scheme of one group of data.It is that an analog quantity of each failure of equipment distributes a FLASH fan when distributing memory space
Area, sector include the memory space of 4KByte, that is, 32Kbit, and storage size needed for an analog quantity be 32 ×
128=4096bit, the memory space fully meet memory requirement.Remaining space in sector is for subsequent to storage analog quantity
Points be extended.The memory space of 4Mbit includes 4Mbit/32Kbit=128 sector, the primary event of equipment storage altogether
Storage size needed for hindering information is that 6 sectors are then deposited in addition one has 7 altogether for storing the sector of fault time
It stores up ten groups of fault datas and needs 11 groups of memory spaces, so it is considered herein that distribute 11 sectors for every group of fault data, in addition to
Outside 7 sectors for storing fault data and temporal information, other 4 sectors are used for the extension of analog quantity number.Equipment is deposited
It is as shown in Figure 8 to store up space distribution.
The partial software uses a kind of executive mode of loop cycle, for the stable operation for guaranteeing system, it is desirable that major cycle
Interior program can execute completion in 100us, need to be dispersed in multiple periods progress for some relatively time-consuming operations
It executes.The deposit of fault recorder data can not be completed in one cycle, and the SPI interface of STM32F103R8T6 does not have
Have to integrate and send or receive FIFO accordingly, so controlled using dma controller the reading and writing data of FLASH herein.Therefore
It is as shown in Figure 9 to hinder data recording program process.
A kind of realization by using three pieces of an equal amount of storage regions in protocol converter is proposed in the invention
The scheme of application layer protocol conversion.In the invention, first piece of region is for storing the data that A network sends over, when A network
After the completion of the data of transmission all receive, then the data are transferred to second piece of storage region, when B network request reads data
When, the value of second piece of storage region is copied into third block storage region first, is then read out, in this way guarantee second piece and
Data in third block region are all complete.The reception of data is isolated well with transmission through the above scheme, is solved
Determined communication in the incomplete problem of data.
Claims (7)
1. a kind of centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module, it is characterised in that: include: power module, be
Other modules provide power supply；Analogue collection module is acquired industry spot analog signals；Switching value acquisition module,
The relay signal of industry spot is acquired；Outer memory module, for storing failure wave-recording data obtained；CAN
Communication module, the data for collection site CAN node device；485 communication modules, for uploading live CAN node device
Data.
2. centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module according to claim 1, it is characterised in that: institute
The power module design stated is as follows: selecting golden rising Yang VRB_4824LD-20WR2 switch power module ,+48V is converted to+24V
It is exported, maximum provides the output power of 20W, and transfer efficiency is up to 87%；WRA_4815S-1WR2 switching power source chip is selected,
48V is converted into +/- 15V to export, the power of maximum output 1W, transfer efficiency is up to 75%；Select WRB_4805S-3W2 core
+ 48V is converted into+5V and exported by piece, and maximum provides 600mA electric current, and transfer efficiency is up to 74%；Select low pressure difference linearity steady
Depressor AS1117 chip, is converted into 3.3V for 5V and exports.
3. centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module according to claim 1, it is characterised in that: institute
The analogue collection module design stated is as follows: being sampled using the inside AD of STM32F103R8T6 to temperature and flow signal
Quantization, the sensor are powered using direct current 24V, water temperature information are converted into resistance signal and is exported, and flow information turns
Change current signal output into；When application range of temperature be 0~50 DEG C, the variation model of respective sensor output resistance
It encloses for 27.69k-4.167k Ω；For the resistance signal of temperature flow sensor output, electric bridge conversion circuit is designed by sensor
The resistance signal of output is converted into voltage signal, conversion relational expression are as follows: U=5 × [R/ (R+3.6)] -2.5, then use amplifier will
It is converted, when there is no cut-in temperature sensor, output voltage 2.5V；Temperature is 25 DEG C when equipment operates normally, right
The resistance answered is 10K Ω, and bridge output voltage signal is 1.18V at this time；Flow signal is converted into directly by temperature flow sensor
Galvanic electricity stream is exported, and output current scope is 20~30mA, using two stage amplifer conversion circuit to the output electricity of sensor
Stream signal is converted, and the current signal that sensor exports is converted into voltage signal finally by the sampling resistor of 51 Ω, when
When water-cooling system operates normally, the voltage on sampling resistor is 1~1.5V.
4. centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module according to claim 1, it is characterised in that: institute
The switching value acquisition module stated uses relay, will carry out multi-stage light electric isolution after the filtering of all switch acquisitions.
5. centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module according to claim 1, it is characterised in that: institute
The outer memory module stated uses the FLASH chip of AD25DF161.
6. centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module according to claim 1, it is characterised in that: institute
The CAN communication module design stated is as follows: including CAN bus transceiver and CAN controller, the work of CAN bus transceiver exists
The physical layer of CAN bus, the binary code stream signal for that will need to send are converted into differential signal output, the difference that will be received
Sub-signal is converted into binary code stream and is read out, and is the bridge for connecting CAN controller and bus, CAN bus transceiver
In transmission process, transmitting-receiving comparison, position filling, CRC check and response monitoring operation are executed；CAN controller works in CAN
The data link layer of bus protocol is used for delta frame, and it is sent in the form of binary code stream, CAN bus control
Device parses the binary code stream received in receive process, and executes and position is gone to fill, CRC check and transmission response behaviour
Make；In addition to this, CAN controller also needs to be implemented conflict judgement and error handle the multi-task；Guangzhou is selected to cause remote public
The CTM1050T CAN bus transceiver of department is its parallel connection two decoupling capacitor of 0.1 μ F and 10 μ F.
7. centrifuge intermediate frequency power supply system comprehensive parameters network monitoring module according to claim 1, it is characterised in that: institute
485 communication modules stated select the conversion and isolation of RSM3485CHT module realization level.
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