CN101403391A - Novel duplicate-power double-fan intelligent monitoring protection device - Google Patents
Novel duplicate-power double-fan intelligent monitoring protection device Download PDFInfo
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- CN101403391A CN101403391A CNA2008102008290A CN200810200829A CN101403391A CN 101403391 A CN101403391 A CN 101403391A CN A2008102008290 A CNA2008102008290 A CN A2008102008290A CN 200810200829 A CN200810200829 A CN 200810200829A CN 101403391 A CN101403391 A CN 101403391A
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Abstract
The invention discloses a novel dual-power dual-fan intelligent monitoring and controlling protection device which is an embedding-typed system comprising a micro-control processor; the device also comprises a data acquisition module, a serial communication module, an auxiliary hardware module, and a human-computer interactive module, so as to finish the tasks of data acquisition, protection judgment, fan control, serial communication and human-computer interactive processing and carry out continuous ventilation and state detection. By using two micro-computer intelligent monitoring and controlling protection devices, two fans which are respectively a host and an auxiliary machine, with the power being supplied by different power sources, are respectively controlled, so as to control the continuous work of the intelligent monitoring and controlling protection devices. The protection device not only can detect the current and voltage of the fans and protect the occurring fault in real time, but also can use complementary control strategy so as to ensure that a ventilation system can supply wind continuously, and therefore ensures the production safety of mines; the device also has the communication function, can be used as one function module of the electric automation system of the mines, and realizes the integration of functions such as dual-power dual-fan monitor, control, protection, communication, etc.
Description
Technical field
The present invention relates to a kind of duplicate-power double-fan intelligent monitoring protection device, especially can realize the device of duplicate-power double-fan automatic monitoring system and protection.
Background technique
In the production process of mine, can ventilation system effectively work, and is directly connected to the safety that the mine produces.As the control unit of ventilation system, duplicate-power double-fan is a kind of more efficient, safe blower fan composition form.The duplicate-power double-fan automatic switching control equipment is the key equipment in the system, and can be directly connected to whole system safe handling.Therefore, the rationality and the reliability of the protection of duplicate-power double-fan automatic switching control equipment, control mode are most important to its safe operation.At present, still belong to blank based on the two blower fan systems of the intelligent duplicate power supply of embedded microprocessor control, the duplicate-power double-fan that has moved mostly adopts PLC or relay control, function is few, poor reliability, control accuracy are low, can't take urgent measure automatically when accident takes place especially at the scene, have a strong impact on the safe operation of electrical network and equipment.
Summary of the invention
In order to overcome the existing deficiency of duplicate-power double-fan control gear on reliability, control accuracy and function; the invention provides a kind of novel duplicate-power double-fan intelligent monitoring protection device; this device can not only detect the blower fan current/voltage in real time; the fault that takes place is protected timely; and can also utilize complementary control strategy to guarantee that ventilation system can uninterrupted air feed, guarantee the mine production safety.This device also has communication function simultaneously, can be used as a function module in the electrical automation system of mine, realizes the integrated of functions such as duplicate-power double-fan monitoring, control, protection, communication.
For reaching above purpose, solution of the present invention is:
A kind of novel duplicate-power double-fan intelligent monitoring protection device; it is the embedded system that comprises the microcontroller processor; it also comprises data acquisition module, serial communication module, ancillary hardware module, human-computer interaction module, uninterruptedly ventilates and state-detection with the task of finishing data sampling, protection judgement, blower fan control, serial communication and man-machine interface interaction process.
Data acquisition module, serial communication module, ancillary hardware module are arranged on the same printed circuit board (PCB) (PCB).
Data acquisition module comprises analog signal conditioner circuit, A/D change-over circuit, and the analog signal conditioner circuit comprises voltage transformer, current transformer, operational amplifier, reference diode, differential mode protection diode and precision resister; The A/D change-over circuit comprises sampling holder, A/D converter and resistance capacitance, and it adopts ambipolar 12 A/D converters to gather 7 road analog signalses.
Serial communication module comprises the RS485 interface of standard, realizes being connected with other-end transmission exchanges data information.
The ancillary hardware module comprises the miniature relay control module of hardware watchdog circuit, self-contained battery calendar clock module, the start and stop of control blower fan, and forced system resetted when watchdog circuit was absorbed in the endless loop state in system; Self-contained battery calendar clock module keeps the normal operation of the system under system's power down situation, and the fan trouble time point is provided; The miniature relay control module adopts the mode of two AND NOT gate accurately to control the start and stop of blower fan.
Human-computer interaction module comprises LCD liquid crystal display panel, keyboard, and the LCD liquid crystal display is drawn from printed circuit board (PCB) by winding displacement.
This ancillary hardware module also comprises the hardware communications module that can communicate by letter with compensation device, controls the two typhoon machines of being powered by different electrical power respectively by two intelligent monitoring protection devices of this communication module realization, realizes uninterruptedly ventilating.
This data acquisition module also comprises the earth leakage search/lockout circuit, detects the analog signals of blower fan leak current fault.
Its software section comprises data capture and protection discriminatory analysis module, man-machine interaction driver module, network-driven module, control function module, current state is judged in data capture and phase current, electrical leakage voltage and the bridging line voltage of protecting discriminatory analysis module collection analysis blower fan; The man-machine interaction driver module shows data and the input relevant parameter of gathering; Network-driven module sending function sign indicating number is carried out corresponding actions; The control function module detects the fan switch relay, the different operating modes of control blower fan.
Owing to adopted such scheme, the present invention to have following characteristics: the present invention has utilized the embedded system based on the microprocessor chip, has realized the integrated of functions such as duplicate-power double-fan monitoring, control, protection, communication.Utilize the powerful operational performance of processor, can carry out analytic record, be convenient to administrative analysis in the future the day-to-day operation data of blower fan; Utilize ripe algorithm to the more common all kinds of faults of blower fan judge, protection, record; Utilize intrinsic safety type hardware communications module, rely on the start and stop of the two blower fan blower fans complementary of rational control strategy control, guarantee the persistency of down-hole air feed, improve the Security that the mine produces with it; Utilize the remote monitoring control of communication bus and agreement, also be convenient to the group net operation of mine electrically energized machine in the future with implement device.
Description of drawings
Fig. 1 is a voltage signal conditioning circuit schematic representation.
Fig. 2 is a current signal conditioning circuit schematic representation.
Fig. 3 is an electrical leakage voltage testing circuit schematic representation.
Fig. 4 is a blower fan control relay circuit schematic representation.
Fig. 5 is an A/D transducer hardware circuit schematic representation.
Fig. 6 is a calendar clock peripheral circuit schematic representation.
Fig. 7 is the hardware communications circuit diagram with compensation device.
Fig. 8 is a liquid crystal hardware interface circuit schematic representation.
Fig. 9 is a duplicate-power double-fan measuring and controlling protective device software general flow chart.
Figure 10 is the keyboard hardware circuit diagram.
Figure 11 is a duplicate-power double-fan monitoring and protection system block diagram.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
It is the embedded system of processor with the ATmega128 of atmel corp microcontroller that duplicate-power double-fan intelligent monitoring protection device is one.ATmega128 is based on the AVR kernel, adopts risc architecture, 8 8-digit microcontrollers of Low-Power CMOS.
Microcontroller ATmega128 mainly is responsible for tasks such as data sampling, protection judgement, blower fan control, serial communication and man-machine interface interaction process.In order to finish above-mentioned functions, around ATmega128, also have other important hardware to form module: data acquisition module, serial communication module, ancillary hardware module and human-computer interaction module.First three of this four big hardware module is individual to be distributed on the same PCB (Printed Circuit Board, printed circuit board (PCB)), and this is the essential hardware components of each duplicate-power double-fan intelligent monitoring protection device.Last module human-computer interaction module, it mainly is made up of small LCD liquid crystal display, small-sized six key boards.Wherein the small LCD liquid crystal display is drawn from printed circuit board (PCB) by winding displacement, makes it can be placed on the specified position of casing.
The LCD that human-computer interaction module uses has adopted the liquid crystal display panel of 128 * 64 dot matrix, and is clear easy.Input keyboard has six keys: increase key (preceding line unit), reduce key (back spacer), confirmation key, reset key, start key, stop key.The menu mode that this six press keys matching design is good has satisfied the application requirements of whole device well.
Data acquisition module is one of module important on the pcb board, and it is made up of analog signal conditioner circuit, A/D change-over circuit two large divisions.The analog signal conditioner circuit mainly is made of voltage transformer SPT204, current transformer SCT214, operational amplifier OP07,10V reference diode, differential mode protection diode and a series of precision resister.Data acquisition module altogether need be by A/D chip seven tunnel analog amounts of sampling: the A phase current of (1) blower fan 1; (2) the B phase current of blower fan 1; (3) the C phase current of blower fan 1; (4) the A phase current of blower fan 2; (5) the B phase current of blower fan 2; (6) the C phase current of blower fan 2; (7) blower fan AC phase line voltage.The A/D change-over circuit mainly is made up of sampling holder LF398, A/D converter and a series of resistance capacitance.For guaranteeing measuring accuracy, the A/D conversion chip adopts ambipolar 12 A/D converter TLC2578, and its signal input range can reach-10V～10V, and only be 2us average conversion time, can have ample time and finish seven road analog acquisitions, realize the sampling of 12 signaling points of every power frequency period.Built-in 8 road sampling channels of TLC2578, therefore above-mentioned seven tunnel analog amounts can be sampled maintenance simultaneously, then carry out the A/D conversion more respectively, have both guaranteed acquisition precision, have improved collecting efficiency.In addition, also have two-way in order to judge whether blower fan the analog signals of leak current fault takes place--blower fan 1 electrical leakage voltage, blower fan 2 electrical leakage voltages, because it is not very high to required precision, then the inside A/D that enters the ATmega128 single-chip microcomputer by an earth leakage search/lockout circuit of being made up of a series of resistance, voltage-stabiliser tube and diode changes.
Ancillary hardware module on the pcb board comprises the hardware watchdog circuit, self-contained battery calendar clock module, the miniature relay control module of control blower fan start and stop, responsible hardware communications module of communicating by letter with compensation device etc.Watchdog circuit is the indispensable constituent element of embedded system, and when program was absorbed in endless loop and makes that embedded system enters " deadlock " state, it can send hardware reset signal automatically and force system reset, and program brings into operation from start-up code again.The self-contained battery calendar clock still can proper functioning under system's power-down conditions, and it not only can note the concrete time that blower fan breaks down, and some special calculated datas can also be provided.As: for the operation electric degree use amount of calculating blower fan provides time ruler.In the process that the mine produces, Security is always put on the first place, and the miniature relay module of control blower fan start and stop must be very reliable, do not allow to take place the phenomenon that mistake opens mistakenly stop.Therefore, this module has adopted the mode of two AND NOT gate to control the start and stop of blower fan, to guarantee that blower fan in system reset or when other uncertain condition takes place, can not cause the misoperation of blower fan.
The working environment of duplicate-power double-fan requires its measuring and controlling protective device work necessary reliable, the persistency of strict guarantee down-hole air feed.Therefore, this device is provided with an intrinsic safety type hardware communications module of being responsible for communicating by letter with compensation device especially and finishes this function.In order to guarantee the persistency of down-hole air feed, necessarily require system to have redundancy, to prevent that when a certain typhoon machine breaks down pausing appears in air feed.So, use two microcomputer-based intelligent measuring and controlling protective devices now, control two typhoon machines respectively by the different electrical power power supply, be called main frame, slave.And be that main frame or slave are not laid down hard and fast rule by the blower fan of which measuring and controlling protective device control specifically, it can be provided with by human-computer interaction module, determines that it is as main frame or slave.This hardware communications module mainly is responsible for the state communication between main frame and the slave, and it judges the state of compensation device by a pair of node of shaking hands; When device was in running state, this was in closed state to node, otherwise was in off state.Thereby make main frame or slave understand the residing state of its compensation device--move or stop.When the state of compensation device changed, this device must be adjusted the state of this device according to the principle that guarantees the air feed persistency.
Serial communication modular mainly provides the RS485 interface of a standard, makes things convenient for the group net operation of mine various device, be convenient to the staff background monitoring equipment with carry out telecontrol.
Most of function of duplicate-power double-fan measuring and controlling protective device all realizes by software.Microcontroller ATmega128 has well-to-do relatively ram in slice and Flash resource, and has used pipelining.Consider software development efficiency and ATmega128 chip strong functions, adopted high-level programming language C language to programme.
The whole software system can be called front/rear system or hypercycle system.Application program is an Infinite Cyclic, calls respective function in the circulation and finishes corresponding operation, and this part is called as the backstage behavior.Flag bits such as the continuous cycle detection of system " analog amount calculating ", " analog acquisition ", " situation breaks down ", " RS485 communication process ", " input of response keyboard ", " refreshing LCD ", " complementary system state ", if be set and then call corresponding service module unit, then with the flag bit zero clearing.Interrupt service routine is handled asynchronous event, and this part is counted as the foreground behavior.It is a series of discrete, and the interruption processing module set of asynchronous execution comprises that triggering A/D interrupts, A/D converts interruption, RS485 receives be sent completely request interruption etc.System runs in each module of backstage service routine, all may be hung up by the foreground interruption processing module at any time.In the processor of foreground, carry out turning back to the backstage service module immediately after necessary processing and the set corresponding marker bit.
Similar with hardware configuration, software also is divided into four module accordingly:
(1) data capture and protection discriminatory analysis module.Data acquisition module has nine road input analog amounts, and wherein blower fan AC phase voltage is two outside electric power network line voltages that blower fan is shared.Software just can be judged blower fan by various algorithms whether fault has taken place: utilize the current break algorithm to judge whether the fault that is short-circuited by three phase currents, an electrical leakage voltage, a bridging line voltage of each blower fan of collection analysis; Utilize overcurrent inverse time lag algorithm to judge whether blower fan overload fault takes place; Utilize the three-phase balance rate to judge whether blower fan open phase fault takes place; Utilize line voltage to judge whether blower fan overvoltage, under-voltage fault take place; Utilize electrical leakage voltage to judge whether blower fan leak current fault takes place.Detecting after blower fan breaks down, measuring and controlling protective device is according to the protection requirement of different faults type, immediately or time-delay send trip signal, the fault blower fan is excised; Simultaneously, blower fan is carried out the control corresponding operation, upload fault message to the remote monitoring main frame by the network-driven module by control function module hereinafter.For example, protection is after parser is judged as under-voltage fault by calculating, and according to under-voltage error protection requirement, automatic trip after 5 seconds of device time-delay with the blower fan excision, is played the effect of protection blower fan; Control function module simultaneously and carry out corresponding start and stop control, if the on-line execute mode then starts another typhoon machine after setting time-delay automatically according to the method for operation of blower fan.
(2) man-machine interaction driver module.The data that data acquisition module obtains need show by LCD after handling through computational analysis, and simultaneity factor parameters setting value need be imported by keyboard.Human-computer interaction module mainly contains following function: (a) dynamic refresh shows real-time Monitoring Data, and the physical quantity that needs to show comprises the voltage of present electrical network and the effective value of blower fan monophase current.(b) dynamic refresh shows that this installs residing working state, and shows fault category when breaking down.(c) fault message is recollected function.This device not only can provide fault message in real time, but also can recollect the concrete time of classification, parameter value and the fault generation of historical failure information.(d) operator can be provided with the action threshold value of every failure protection function by keyboard, adjust real-time clock, for every control function setting cryptoguard of this device etc.
(3) network-driven module.It mainly is the realization of RS485 communication protocol.Agreement adopts query pattern, and upper-position unit sends specific frame to device, and device is finished specific operation according to the function code of upper-position unit frame.Communication protocol has been formulated consolidation form when system development, its basic frame constitutes form and is followed successively by to unit address, frame length, function code, type codes and user data, check code and formed.For example, a message frame of confirming order is made up of unit address 03 (device is default), frame length 02, function code 01, check code 06, and combining is exactly 03 02 01 06 affirmation message frame.
(4) control function module.The control functional requirement of duplicate-power double-fan measuring and controlling protective device is very reliable.So, in control module, to carry out real-time detection to the switch relay of blower fan.After any one divide-shut brake order sent, whether on request control module must check blower fan divide-shut brake immediately behind time-delay hundreds of millisecond, if take place unusually, need to report to the police immediately.On this basis, the control function module also must adapt to the service condition of blower fan under multiple mode.At first, this device both can have been controlled the two fan operations of protection, also can control protection separate unit fan operation, and two fan operations are called the mode of revolving, and the separate unit fan operation is called independent mode.Wherein, when moving under the mode of revolving, start shock effect to electrical network simultaneously for fear of two typhoon machines, be provided with a controlled variable, be called revolving time-delay, promptly after the first typhoon machine starts, through to after the time of revolving delay adjustments, the second typhoon machine just starts.Secondly, this device not only supports two devices to move as the mode of complementary system, is called on-line execute, also supports oneself's operation of single assembly, is called independent operating.In like manner start the impact that causes simultaneously, also be provided with an online time-delay, in order to the starting time of control complementary system for fear of many typhoons machine.
A duplicate-power double-fan intelligent monitoring protection device is responsible for the monitoring and protection of two blower fans, and two two blower fans of two table apparatus control are as complementation, and the reliable intercommunication mode of utilization exchanges its status information between them.Simultaneously, each device all is equipped with the RS485 standard communication interface, can carry out data transmission, information exchange and telecontrol with the PC or the substation of communicating by letter at any time.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiments, and needn't pass through performing creative labour being applied among other embodiments in the General Principle of this explanation.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (9)
1, a kind of novel duplicate-power double-fan intelligent monitoring protection device; it is the embedded system that comprises the microcontroller processor; it is characterized in that: it also comprises data acquisition module, serial communication module, ancillary hardware module, human-computer interaction module, uninterruptedly ventilates and state-detection with the task of finishing data sampling, protection judgement, blower fan control, serial communication and man-machine interface interaction process.
2, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 1 is characterized in that: data acquisition module, serial communication module, ancillary hardware module are arranged on the same printing board PCB.
3, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 2, it is characterized in that: this data acquisition module comprises analog signal conditioner circuit, A/D change-over circuit, and the analog signal conditioner circuit comprises voltage transformer, current transformer, operational amplifier, reference diode, differential mode protection diode and precision resister; The A/D change-over circuit comprises sampling holder, A/D converter and resistance capacitance, and it adopts ambipolar 12 A/D converters to gather 7 road analog signalses.
4, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 2 is characterized in that: this serial communication module comprises the RS485 interface of standard, realizes being connected with other-end transmission exchanges data information.
5, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 2, it is characterized in that: this ancillary hardware module comprises the miniature relay control module of hardware watchdog circuit, self-contained battery calendar clock module, the start and stop of control blower fan, and forced system resetted when watchdog circuit was absorbed in the endless loop state in system; Self-contained battery calendar clock module keeps the normal operation of the system under system's power down situation, and the fan trouble time point is provided; The miniature relay control module adopts the mode of two AND NOT gate accurately to control the start and stop of blower fan.
6, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 1 is characterized in that: this human-computer interaction module comprises LCD liquid crystal display panel, keyboard, and the LCD liquid crystal display is drawn from printed circuit board (PCB) by winding displacement.
7, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 5; it is characterized in that: its ancillary hardware module also comprises the hardware communications module that can communicate by letter with compensation device; control the two typhoon machines of powering respectively by two intelligent monitoring protection devices of this communication module realization, realize uninterruptedly ventilating by different electrical power.
8, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 3 is characterized in that: this data acquisition module also comprises the earth leakage search/lockout circuit, detects the analog signals of blower fan leak current fault.
9, novel duplicate-power double-fan intelligent monitoring protection device as claimed in claim 1, it is characterized in that: its software section comprises data capture and protection discriminatory analysis module, man-machine interaction driver module, network-driven module, control function module, current state is judged in data capture and phase current, electrical leakage voltage and the bridging line voltage of protecting discriminatory analysis module collection analysis blower fan; The man-machine interaction driver module shows data and the input relevant parameter of gathering; Network-driven module sending function sign indicating number is carried out corresponding actions; The control function module detects the fan switch relay, the different operating modes of control blower fan.
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| CN2008102008290A CN101403391B (en) | 2008-10-07 | 2008-10-07 | Novel duplicate-power double-fan intelligent monitoring protection device |
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| CN2008102008290A CN101403391B (en) | 2008-10-07 | 2008-10-07 | Novel duplicate-power double-fan intelligent monitoring protection device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103186124A (en) * | 2011-12-31 | 2013-07-03 | 常州祥明电机有限公司 | Motor monitor |
| CN103633625A (en) * | 2012-08-28 | 2014-03-12 | 芜湖中能电气科技有限公司 | Motor monitoring protection device |
| CN104901415A (en) * | 2015-06-04 | 2015-09-09 | 天台信沅电器有限公司 | Double-power-supply centralized control device |
| CN105972766A (en) * | 2016-05-26 | 2016-09-28 | 浪潮电子信息产业股份有限公司 | Double-power supply and multi-precise air conditioner control system for data center |
| CN106015068A (en) * | 2016-06-14 | 2016-10-12 | 北京小米移动软件有限公司 | Control method and device for household fan and household fan device and system |
| CN106125641A (en) * | 2016-02-15 | 2016-11-16 | 上海颐坤自动化控制设备有限公司 | Local fan monitoring system |
| CN102373941B (en) * | 2011-11-22 | 2016-12-14 | 平安电气股份有限公司 | Mining dual-power dual-fan ventilation system |
| CN109505791A (en) * | 2018-06-27 | 2019-03-22 | 成都富强电子电器科技有限公司 | A kind of fire-fighting Double Speed Fan intelligent controller |
| CN109617019A (en) * | 2019-01-18 | 2019-04-12 | 日照南瑞电气科技有限公司 | A kind of flame-proof mine double loop fan protection device |
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| DE4309187C1 (en) * | 1993-03-22 | 1994-06-16 | Siemens Nixdorf Inf Syst | Controlling ventilation of data processing system - operating number and type of processing modules to calculate appropriate ventilation fan feed rate |
| CN2554734Y (en) * | 2002-07-18 | 2003-06-04 | 袁晓光 | Mine fan monitoring recording instrument |
| CN100354530C (en) * | 2004-12-21 | 2007-12-12 | 英业达股份有限公司 | Serial fan group, and method for generating match curve of rotate speed |
| TWI282208B (en) * | 2005-05-19 | 2007-06-01 | Delta Electronics Inc | Fan control device and method |
| TWI280842B (en) * | 2005-11-18 | 2007-05-01 | Delta Electronics Inc | Fan system and sequential starting module and delayed starting unit thereof |
| CN101226682B (en) * | 2007-01-19 | 2010-08-18 | 同济大学 | Device for monitoring stray current of novel subway |
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| CN102373941B (en) * | 2011-11-22 | 2016-12-14 | 平安电气股份有限公司 | Mining dual-power dual-fan ventilation system |
| CN103186124A (en) * | 2011-12-31 | 2013-07-03 | 常州祥明电机有限公司 | Motor monitor |
| CN103633625A (en) * | 2012-08-28 | 2014-03-12 | 芜湖中能电气科技有限公司 | Motor monitoring protection device |
| CN104901415A (en) * | 2015-06-04 | 2015-09-09 | 天台信沅电器有限公司 | Double-power-supply centralized control device |
| CN106125641A (en) * | 2016-02-15 | 2016-11-16 | 上海颐坤自动化控制设备有限公司 | Local fan monitoring system |
| CN105972766A (en) * | 2016-05-26 | 2016-09-28 | 浪潮电子信息产业股份有限公司 | Double-power supply and multi-precise air conditioner control system for data center |
| CN106015068A (en) * | 2016-06-14 | 2016-10-12 | 北京小米移动软件有限公司 | Control method and device for household fan and household fan device and system |
| CN106015068B (en) * | 2016-06-14 | 2017-11-21 | 北京小米移动软件有限公司 | Domestic fan control method, device, domestic fan apparatus and system |
| CN109505791A (en) * | 2018-06-27 | 2019-03-22 | 成都富强电子电器科技有限公司 | A kind of fire-fighting Double Speed Fan intelligent controller |
| CN109505791B (en) * | 2018-06-27 | 2024-02-09 | 成都富强电子电器科技有限公司 | Intelligent controller of fire-fighting double-speed fan |
| CN109617019A (en) * | 2019-01-18 | 2019-04-12 | 日照南瑞电气科技有限公司 | A kind of flame-proof mine double loop fan protection device |
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| CN101403391B (en) | 2012-05-23 |
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