CN205103378U - Breaker closing resistance on -line monitoring device - Google Patents

Breaker closing resistance on -line monitoring device Download PDF

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Publication number
CN205103378U
CN205103378U CN201520858282.9U CN201520858282U CN205103378U CN 205103378 U CN205103378 U CN 205103378U CN 201520858282 U CN201520858282 U CN 201520858282U CN 205103378 U CN205103378 U CN 205103378U
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circuit
signal
current sensor
processing unit
central processing
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何克
孙国柘
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SHAANXI ZHONGSHI POWER TECHNOLOGY Co Ltd
Beijing Xinzhige Electric Power Technology Co Ltd
Northwest China Grid Co Ltd
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SHAANXI ZHONGSHI POWER TECHNOLOGY Co Ltd
Beijing Xinzhige Electric Power Technology Co Ltd
Northwest China Grid Co Ltd
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Abstract

The utility model relates to a breaker closing resistance on -line monitoring device, including analog signal modulate circuit, AD sampling circuit, switching value input modulate circuit, central processing unit and communication interface, analog signal modulate circuit and switching value input modulate circuit are connected with the circuit breaker respectively, as on -line monitoring device's input, the analog signal modulate circuit passes through AD sampling circuit and central processing unit one -way connection, switching value input modulate circuit and central processing unit one -way connection, central processing unit and communication interface one -way connection, communication interface is as on -line monitoring device's output. More real -time supervision, judge the operation conditions of circuit breaker, avoid the safe operation accident of circuit breaker, the reduction need not the maintenance, the reduction need not manpower, material resources and financial resources. The recondition expense is saved in the power saving, dynamic measurement's resolution ratio is high, the problem of anti -interference under the strong electric field is solved.

Description

A kind of breaker closing resistance on-Line Monitor Device
Technical field
The utility model relates to a kind of breaker closing resistance on-Line Monitor Device.
Background technology
Isolating switch is the important electrical in electric system, and when electric system is broken down, isolating switch should be able to reliably disengagement failure circuit rapidly, to shorten the fault-time of electric system and to alleviate the infringement of fault current to electrical equipment; In electric system, it is common operation that circuit closes a floodgate.When the unloaded long line of power train integration, because electric capacity carries out charging and overcharge with the form of oscillation circuit, cause switching overvoltage.Closing ceases to be busy superpotential to limit, in the extra high voltage network of long distance, isolating switch being installed parallel resistance (within the scope of 400-1200 Ω, general hundreds of Europe) and closing the superpotential major measure of ceases to be busy as restriction.According to the relevant regulations of country, the finished product that primary cut-out is produced and the primary cut-out after newly installing and overhauling must carry out the test of switching-on resistance value and making time before putting into operation, thus the safe operation of the equipment of guarantee.On-line monitoring parallel resistance making time in operation, guaranteeing that parallel resistance drops into (general 8-12 milliseconds) in advance than main contact is guarantee that the superpotential essential condition of ceases to be busy is closed in parallel resistance restriction.In addition, when isolating switch cut-offs unloaded long line, because arc reignition also can cause superpotential, in 330kV and Above Transmission Lines, fracture installs additional parallel resistance and also can prevent fracture repeated breakdown and the condition of work of isolating switch when cut-offfing close-in fault can be improved.
The domestic isolating switch on-line monitoring equipment not having on-line monitoring isolating switch parallel resistance making time at present.
Along with the expansion of power grid construction scale; electrical network is more and more higher for the requirement of important primary equipment; isolating switch is most important control and protection device in electric system; its effect in electrical network is most important, and the sign implementing on-line monitoring Timeliness coverage fault to its important parameter is the trend of development.In 330KV and Above Transmission Lines, on-line monitoring is the change in resistance that is in operation of parallel resistance that restriction closing operation superpotential installs additional and making time is a development project that should be mentioned that agenda.
There is following shortcoming in prior art: does not have switching-on resistance to shift to an earlier date the measurement function of making time, just can not limit the superpotential generation of closing operation; Do not have switching-on resistance to shift to an earlier date the measurement function of making time, just isolating switch on-Line Monitor Device cannot be applied in (330kV and above) on the circuit of high voltage grade yet.
Utility model content
Technical problem to be solved in the utility model be to provide a kind of can more Real-Time Monitoring, judge the breaker closing resistance on-Line Monitor Device of the operation conditions of isolating switch.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of breaker closing resistance on-Line Monitor Device, comprises analog signal conditioner circuit, AD sample circuit, On-off signal modulate circuit, central processing unit and communication interface;
Described analog signal conditioner circuit is connected with isolating switch respectively with On-off signal modulate circuit, as the input end of on-Line Monitor Device;
Described analog signal conditioner circuit is connected with central processing unit is unidirectional by AD sample circuit;
Described On-off signal modulate circuit is connected with central processing unit is unidirectional;
Described central processing unit is connected with communication interface is unidirectional, and described communication interface is as the output terminal of on-Line Monitor Device.
The beneficial effects of the utility model are: can more Real-Time Monitoring, judge the operation conditions of isolating switch, avoid the safe operation accident of isolating switch, reduce maintenance unnecessary, reduce manpower, material resources and financial resources unnecessary.Power saving, saves recondition expense; The resolution of kinetic measurement is high; Solve the anti-interference problem under highfield.
On the basis of technique scheme, the utility model can also do following improvement.
Further, described analog signal conditioner circuit comprises signal transducer, filtering circuit and signal amplification circuit;
Described signal transducer, filtering circuit are connected successively with signal amplification circuit.
Further, described signal transducer comprises main circuit current sensor, Hall current sensor, separating brake current sensor, switching current sensor and energy storage current sensor;
Described main circuit current sensor, Hall current sensor, separating brake current sensor, switching current sensor and energy storage current sensor are connected successively with a filtering circuit and signal amplification circuit respectively.
Further, described breaker closing resistance on-Line Monitor Device also comprises alarm, and described alarm is connected with central processing unit.
Further, described AD sample circuit adopts ADS8365 analog to digital converter to realize.
The beneficial effect of above-mentioned further scheme is adopted to be have employed outer 16 the high-speed a/d sampling A/D chip of special sheet, improve sampling precision, resolution is made to bring up to 1/32768, in conjunction with digital filtering algorithm, can better filtering interfering reduce threshold value, improve the measurement sensistivity of small-signal.
Further, described central processing unit comprises digital signal processor and arm processor;
The input end of described digital signal processor is connected with AD sample circuit, On-off signal modulate circuit respectively, and output terminal is connected with alarm with arm processor respectively;
The input end of described arm processor is connected with digital signal processor, and output terminal is connected with communication interface.
Further, described breaker closing resistance on-Line Monitor Device also comprises the touch display be connected with the output terminal of arm processor.
Further, described On-off signal modulate circuit comprises three groups of filtering buffer circuits, often organizes filtering buffer circuit and comprises the filtering circuit and buffer circuit that connect successively.
The function of isolating switch on-line monitoring is realized by being arranged on the isolating switch Hall current sensor monitoring load current measured on electric current secondary loop, Real-Time Monitoring goes out the making time in advance of switching-on resistance, monitoring parameter is kept on main frame on the spot also can be sent to relevant backstage by monitoring parameter, and operations staff can be understood Monitoring Data by the expert software on backstage.Utilize isolating switch resistance to close and the difference of turn-off current, the basis of former isolating switch on-line monitoring system is developed switching-on resistance making time on-line monitoring.Can report to the police to operations staff after another system monitoring to operation problem; Solve the high resolution problems of kinetic measurement; Solve the anti-interference problem under highfield; Complete advanced development and carry out on-the-spot test.
Accompanying drawing explanation
Fig. 1 is a kind of breaker closing resistance on-Line Monitor Device structured flowchart described in the utility model;
Fig. 2 is the measuring principle figure of a kind of breaker closing resistance on-Line Monitor Device described in the utility model.
In accompanying drawing, the list of parts representated by each label is as follows:
1, analog signal conditioner circuit, 2, AD sample circuit, 3, On-off signal modulate circuit, 4, central processing unit, 5, communication interface, 6, alarm, 7, touch display, 11, circuital current sensor, 12, Hall current sensor, 13, separating brake current sensor, 14, switching current sensor, 15, energy storage current sensor, 16, filtering circuit, 17, signal amplification circuit, 31, filtering circuit, 32, buffer circuit, 41, digital signal processor, 42, arm processor.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
As shown in Figure 1, be a kind of breaker closing resistance on-Line Monitor Device described in the utility model, comprise analog signal conditioner circuit 1, AD sample circuit 2, On-off signal modulate circuit 3, central processing unit 4 and communication interface 5;
Described analog signal conditioner circuit 1 is connected with isolating switch respectively with On-off signal modulate circuit 3, as the input end of on-Line Monitor Device;
Described analog signal conditioner circuit 1 is connected with central processing unit 4 is unidirectional by AD sample circuit 2;
Described On-off signal modulate circuit 3 is connected with central processing unit 4 is unidirectional;
Described central processing unit 4 is connected with communication interface 5 is unidirectional, and described communication interface 5 is as the output terminal of on-Line Monitor Device.
Described analog signal conditioner circuit 1 comprises signal transducer, filtering circuit 16 and signal amplification circuit 17;
Described signal transducer, filtering circuit 16 are connected successively with signal amplification circuit 17.
Described signal transducer comprises main circuit current sensor 11, Hall current sensor 12, separating brake current sensor 13, switching current sensor 14 and energy storage current sensor 15;
Described main circuit current sensor 11, Hall current sensor 12, separating brake current sensor 13, switching current sensor 14 and energy storage current sensor 15 are connected successively with a filtering circuit 16 and signal amplification circuit 17 respectively.
Described breaker closing resistance on-Line Monitor Device also comprises alarm 6, and described alarm 6 is connected with central processing unit 4.
Described AD sample circuit 2 adopts ADS8365 analog to digital converter to realize.Have employed outer 16 the high-speed a/d sampling A/D chip of special sheet, improve sampling precision, make resolution bring up to 1/32768, in conjunction with digital filtering algorithm, can better filtering interfering reduce threshold value, the measurement sensistivity of raising small-signal.
Described central processing unit 4 comprises digital signal processor 41 and arm processor 42;
The input end of described digital signal processor 41 is connected with AD sample circuit 2, On-off signal modulate circuit 3 respectively, and output terminal is connected with alarm 6 with arm processor 42 respectively;
The input end of described arm processor 42 is connected with digital signal processor 41, and output terminal is connected with communication interface 5.
Also comprise the touch display 7 be connected with the output terminal of arm processor 42.
Described On-off signal modulate circuit 3 comprises three groups of filtering buffer circuits, often organizes filtering buffer circuit and comprises the filtering circuit 31 and buffer circuit 32 that connect successively.
Measuring principle of the present utility model, as shown in Figure 2, wherein: T0-sends reclosing command time point;
T1-switching-on resistance point turn-on time;
T2-firm conjunction, main contact closure time point;
The T3-moment represents: auxiliary switch normally closed contact point trip time on closing coil current return;
The difference of normally closed contact trip time (T3) and main contact closure time (T2) on AC-closing coil current return, this mistiming is definite value, and the AC value of every platform isolating switch is fixing (time error of its change is negligible).
Switching-on resistance shifts to an earlier date making time=T2-T1 (theory),
T2=T3+AC;
That is: switching-on resistance shifts to an earlier date making time=T3+AC-T1.
Input quantity of the present utility model:
The input quantity of analog signal conditioner circuit 1 is: switching winding electric current, closing coil electric current, energy storage motor electric current, main-circuit protection CT electric current, main circuit metering CT electric current.
The input quantity of On-off signal modulate circuit 3 is: AUXB (the normally closed auxiliary node of switch), AUXC (switch often leaves auxiliary node), energy storage motor energy storage energy storage node.
The output quantity of communication interface 5 comprises: system state output node: the output node that equipment normally works, and when equipment normally works, exports useful signal, for backstage or telecontrol system checkout equipment state.
The output node of described alarm 6: be divided into general alarm and danger warning two grades output, is respectively used to equipment Inspection and exports to the signal of general alarm and danger warning value.
Communication interface 5 comprises:
Local debugging interface: the serial communication adopting RS232.
Local data interface: adopt USB interface, exchanges and firmware upgrade for local data.
Distant place communication port: there is two RS485, two network interface, realize the communication protocols such as MODBUSONRS485, MODBUSONTCP/IP, IEC61850 respectively.
Touch display (human-computer interaction interface) 7:
Can adopt 7 cun of giant-screen touch screen design, interface is rich and splendid, easy to operate.
According to the demand of above-mentioned monitoring project and module, we devise a set of is the hardware circuit of core based on DSP and ARM dual processors, add high-speed a/d analog to digital conversion circuit, unique Anti-interference Design, be equipped with TIDSP/BIOS and WINDOWSCE embedded OS, for realizing the sampling of real-time high-precision, abundant man-machine interface, and achieve various communications protocols and interface.Meanwhile, adopt the design that EMC-4 level electromagnetic compatible requires, ensure to run without interruption continuously for a long time.
System mainly contains analog signal conditioner circuit, On-off signal modulate circuit, high-speed a/d sample circuit, DSP and ARM dual processors treatment circuit, warning circuit, telecommunication circuit, man-machine interface and power unit composition, and each several part is as follows:
Central processing unit 4 adopts ARM and DSP dual-core architecture in this application, by the design of hardware communication interface and the design of software communication of system principal and subordinate two units, 32 embedded microprocessor ARM are combined with digital signal processor DSP, to make full use of the advantage of dual core processor.ARM system unit adopts through the WINDOWSCE embedded real-time operating system of cutting, realizes the cooperation control of whole device systems and network function etc.; DSP unit, by the transplanting of detection algorithm, realizes the collection analysis of data, process and data transmission.
In this double-core device systems, ARM system realizes each controlling functions as main equipment unit, sends steering order to DSP unit, is received the data of DSP collection by hardware interface; Dsp system as from unit, to be collected, physical data that treatment and analysis sensor peripheral hardware obtains, and sends effective information to main equipment unit.
System forms primarily of two parts: ARM microprocessor main equipment unit and DSP data processor are from unit.For improving exchanges data speed between master-slave equipment unit thus the runnability of effective raising system, primary processor adopts the ARM11 core chip S3C6410 of Samsung company, adopts the TMS320F28335DSP chip of TI company from processor.
ARM part adopts S3C6410.S3C6410 is a development platform of 16/32 RSIC microprocessor S3C6410X based on SAMSUNG, and S3C6410X is the general processor for the terminal device such as hand-held, mobile based on ARM1176JZF-S core.
S3C6410 is a low-power, high performance-price ratio, high performance for mobile phone and general procedure RSIC processor.For 2.5G and 3G communication service provides the hardware performance of optimization, adopt the internal bus framework of 64/32bit, merged AXI, AHB, APB bus.Also have much powerful hardware accelerator, comprise sport video process, audio frequency process, 2D acceleration, Graphics Processing and convergent-divergent.An integrated MFC (Multi-FormatvideoCodec) supports the decoding of MPEG4/H.263/H.264 encoding and decoding and VC1, and the TV of the video conference that this hardware compression device support is real-time and NRSC and pal mode exports.
The 3D accelerator of a built-in employing state-of-the-art technology, supports that the 3D that OpenGLES1.1/2.0 and D3DMAPI can realize 4Mtriangles/s accelerates.S3C6410 comprises the external memory interface of optimization, and this interface can meet the data bandwidth requirement in high-end communication service.Interface is divided into two-way, DRAM and Flash/ROM/DRAM port.DRAM port can support MobileDDR, DDR, MobileSDRAM, SDRAM by configuration.Flash/ROM/DRAM port supports arbitrary MobileDDR, DDR, MobileSDRAM, SDRAM storer of external memory storage of the types such as NOR-Flash, NAND-Flash, OneNAND, CF, ROM.
In order to reduce the cost of whole system and promote general function, S3C6410 comprises a lot of hardware capability peripheral hardware: Camera interface, TFT24bit true color lcd controller, System Management Unit (power supply all the time etc.), the UART of 4 passages, the DMA of 32 passages, 4 passage timers, universaling I/O port, I2S bus, I2C bus, USBHost, the pll clock generator of high speed USB OTG, SDHost and high speed mmc card interface and inside.
We have employed the FLASH design extending out RAM and 1GNandFlash of 256MmDDR, ensure the abundance in system cloud gray model space and data-storing space.
Partly we have employed the TMS320F28335 of TI to DSP.A TMS320C28X series Floating-point DSP controller of TMS320F28335 type digital signal processor TI company.Compared with fixed DSP in the past, the precision of this device is high, and cost is low, and power consumption is little, and performance is high, and peripheral hardware integrated level is high, and data and program memory space are large, and A/D conversion is more accurately quick etc.
TMS320F28335 has the high speed processing ability of 150MHz, possess 32 floating point processing units, 6 DMA passages support ADC, McBSP and EMIF, have the PWM on nearly 18 tunnels to export, 6 tunnels are wherein had to be that the distinctive more high-precision PWM of TI exports (HRPWM), 12 16 passage ADC.Have benefited from its Float Point Unit, user can write control algolithm fast and expend too much time and efforts without the need to operating at process decimal, compared with former generation DSP, average behavior improves 50%, and it is compatible with fixed point C28x controller software, thus simplification software development, shorten the construction cycle, reduce cost of development.
F2833X is when keeping 150MHz clock rate constant, and novel F2833X floating controller is compared with the leading digital signal controller of TI former generation, and performance on average improves 50%.Compared with suitable 32 pointing technology of effect, the complicated calculations algorithms such as fast fourier transform (FFT) employ new technology after performance boost one times more than.
Analog signal conditioner circuit 1:
System needs the simulating signal of sampling to have: switching winding electric current, closing coil electric current, energy storage motor electric current, main-circuit protection CT electric current, main circuit metering CT electric current.6 road analog inputs altogether, wherein two switching winding electric currents, closing coil electric currents are direct current input, and other signal is for exchanging input.To with regard to these signals, devise signal adjustment circuit and filtering circuit respectively, structure is as follows:
Main-circuit protection CT current sensor (circuital current sensor): model is NS-050AC, in order to measure short-circuit current, current parameters value is according to system short-circuit Current calculation.For measuring arcing and calculating electric life.
Main circuit metering CT current sensor (Hall current sensor): model is NS-050AC, and in order to measure load current, current parameters value is according to system loading Current calculation.Making time is shifted to an earlier date for measuring switching-on resistance.
Sub-gate circuit current sensor and closing circuit current sensor (separating brake current sensor and switching current sensor): model is NS-010DC, in order to measure the electric current of divide-shut brake coil.For measuring opening time and closing time.
Energy storage motor current return current sensor (energy storage current sensor): model is NS-010DC, according to different energy storage motor power, should choose different current values.For measuring the electric current of energy storage motor.
Filtering circuit 16: because the current signal sampled is operated in the strong interference environment of transformer station, add that transmitting range is far away again, be interfered unavoidably, and undesired signal is by the work of influential system, thus need to take some interference protection measures, on hardware, we adopt one-level Passive LC and one-level passive RC-circuit composition, issuable interference on filtering input current signal.
Signal amplification circuit 17: the current signal that sampling comes after filtering, is the current signal of 0-10MA, needs through I/V conversion, and through certain level translation, could adapt to the signal input range of sampling system 0-3V.Here, we have employed the current amplification circuit that high-accuracy instrument amplifier OPA343 forms, and coordinate precision resistance, realize the conversion of sampled signal to be input to the process of A/D sample circuit.
On-off signal modulate circuit 3:
The input of on-off model, we have sampled altogether AUXB (the normally closed auxiliary node of switch), AUXC (switch often leaves auxiliary node), the energy storage motor energy storage energy storage node of isolating switch.
Input adopts empty design of node, equally due to scene, have employed LC and RC two stage filter circuit, and considers that these signals belong to slow varying signal, used larger capacitor design.And have employed Phototube Coupling, separate input circuit and CPU loop, remove interference on the one hand, protection cpu circuit is from the injury to input signal on the other hand.
High-speed a/d sample circuit (AD sample circuit 2):
High-speed a/d sample circuit, have employed 16 6 road high-speed a/d ADS8365 of TI.The analog to digital converter that ADS8365 is a six tunnel analog inputs, 16 bit parallels export.Six tunnel analog inputs are divided into three groups (A, B and C), and each input end has a holding signal to sample and translation function while realizing all passages, is very suitable for the needs of multichannel (multiple) acquisition system.ADS8365 provides a high speed parallel interface flexibly, and may operate in the Three models such as directly address, circulating sampling, FIFO, the output data of each passage can directly as the word of a 16bit.
Report to the police and export (alarm 6):
Warning output node has three: system state output node, general alarm output node, danger warning output node.
System state output node: the output node that equipment normally works, when equipment normally works, exports useful signal, for backstage or telecontrol system checkout equipment state.
General alarm and danger warning output node: two grades of outputs, be respectively used to equipment Inspection and export to the signal of general alarm and danger warning value.
Buffer circuit: output circuit have employed Phototube Coupling output circuit equally.
Communication interface 5:
Because equipment operates in intelligent substation environment, as a basic IED, so, support that various communications protocols just seems very important.We have employed ARM system, on the embedded basis of WINDOWSCE, achieve the communication protocols such as MODBUSONSERIAL, MODBUSONTCP/IP, IEC61850, and reserved other various protocols such as DNP3 connect product.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (8)

1. a breaker closing resistance on-Line Monitor Device, is characterized in that, comprises analog signal conditioner circuit, AD sample circuit, On-off signal modulate circuit, central processing unit and communication interface;
Described analog signal conditioner circuit is connected with isolating switch respectively with On-off signal modulate circuit, as the input end of on-Line Monitor Device;
Described analog signal conditioner circuit is connected with central processing unit is unidirectional by AD sample circuit;
Described On-off signal modulate circuit is connected with central processing unit is unidirectional;
Described central processing unit is connected with communication interface is unidirectional, and described communication interface is as the output terminal of on-Line Monitor Device.
2. a kind of breaker closing resistance on-Line Monitor Device according to claim 1, it is characterized in that, described analog signal conditioner circuit comprises signal transducer, filtering circuit and signal amplification circuit;
Described signal transducer, filtering circuit are connected successively with signal amplification circuit.
3. a kind of breaker closing resistance on-Line Monitor Device according to claim 2, it is characterized in that, described signal transducer comprises main circuit current sensor, Hall current sensor, separating brake current sensor, switching current sensor and energy storage current sensor;
Described main circuit current sensor, Hall current sensor, separating brake current sensor, switching current sensor and energy storage current sensor are connected successively with a filtering circuit and signal amplification circuit respectively.
4. a kind of breaker closing resistance on-Line Monitor Device according to any one of claim 1-3, it is characterized in that, also comprise alarm, described alarm is connected with central processing unit.
5. a kind of breaker closing resistance on-Line Monitor Device according to claim 4, is characterized in that, described AD sample circuit adopts ADS8365 analog to digital converter to realize.
6. a kind of breaker closing resistance on-Line Monitor Device according to claim 5, it is characterized in that, described central processing unit comprises digital signal processor and arm processor;
The input end of described digital signal processor is connected with AD sample circuit, On-off signal modulate circuit respectively, and output terminal is connected with alarm with arm processor respectively;
The input end of described arm processor is connected with digital signal processor, and output terminal is connected with communication interface.
7. a kind of breaker closing resistance on-Line Monitor Device according to claim 6, is characterized in that, also comprise the touch display be connected with the output terminal of arm processor.
8. a kind of breaker closing resistance on-Line Monitor Device according to claim 4, it is characterized in that, described On-off signal modulate circuit comprises three groups of filtering buffer circuits, often organizes filtering buffer circuit and comprises the filtering circuit and buffer circuit that connect successively.
CN201520858282.9U 2015-10-30 2015-10-30 Breaker closing resistance on -line monitoring device Active CN205103378U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107359879A (en) * 2017-07-06 2017-11-17 江苏东华测试技术股份有限公司 A kind of system and method for reducing on-line monitoring mass data storage
CN107644003A (en) * 2017-09-29 2018-01-30 北京智芯微电子科技有限公司 A kind of computing Co-processor Module of main control chip
CN109656233A (en) * 2018-12-25 2019-04-19 哈尔滨工业大学 The return system and method for permanent magnet synchronous motor control loop test data

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107359879A (en) * 2017-07-06 2017-11-17 江苏东华测试技术股份有限公司 A kind of system and method for reducing on-line monitoring mass data storage
CN107644003A (en) * 2017-09-29 2018-01-30 北京智芯微电子科技有限公司 A kind of computing Co-processor Module of main control chip
CN109656233A (en) * 2018-12-25 2019-04-19 哈尔滨工业大学 The return system and method for permanent magnet synchronous motor control loop test data

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