CN102345473A - Mine intrinsic safety type automatic drainage and measurement and control protection device - Google Patents
Mine intrinsic safety type automatic drainage and measurement and control protection device Download PDFInfo
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- CN102345473A CN102345473A CN2010102452039A CN201010245203A CN102345473A CN 102345473 A CN102345473 A CN 102345473A CN 2010102452039 A CN2010102452039 A CN 2010102452039A CN 201010245203 A CN201010245203 A CN 201010245203A CN 102345473 A CN102345473 A CN 102345473A
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Abstract
The invention relates to a mine intrinsic safety type automatic drainage and measurement and control protection device. The device comprises a measurement and control protection mainboard, a man-machine interface and a switch power supply, wherein the measurement and control protection mainboard comprises a central processing unit (CPU) main control unit, a data acquisition circuit, an analog/digital (A/D) conversion circuit, an intrinsic safety type switch state monitoring circuit and a switch control circuit; the intrinsic safety type switch state monitoring circuit detects a state signal of a water pump switch and transmits the detected state signal to the CPU main control unit; and the data acquisition circuit comprises a current signal conditioning circuit, a voltage signal conditioning circuit and a leakage resistance detection circuit which are used for detecting a current signal, a voltage signal and a leakage signal of a water pump respectively, and an intrinsic safety type water level detection circuit. Coal mine underground automatic drainage and coal mine power grid microcomputer protection are combined, and multiple functions of water level measurement, electric quantity measurement, automatic water pump starting and stopping control, water pump motor protection, display, communication, event recording and the like are integrated, so that an intelligent terminal device for a coal mine underground automatic drainage and coal mine power grid integrated automation system is formed.
Description
Technical field
The present invention relates to automatic draining of mine intrinsic safety type and measuring and controlling protective device; Belong to test technique automatic field and down-hole power system microcomputer resist technology field under the coal mine, can be used for controlling automatically and the monitoring and protection system with the water pump of high fiery colliery down-hole under the general coal mine.
Background technology
At present, the most collieries of China drainage underground is to realize that through control manually manually-operated drainage system not only labour intensity is big; Start-stop time is long, and efficient is low, and because automaticity is low; People's participation is more, is difficult to realize real-time monitoring, start and stop in time.Because operating procedure is many, the people is not suitable for modern mine management for maloperation hidden danger is big.Present stage also is the difficult problem that the colliery automatic field is badly in need of solution to water level detecting under the coal mine and draining control technology prematurity still automatically in real time.The independent research of minority coal mining enterprise some automatic drain systems, but have many weak points, not high like the water level detecting precision, adopt PLD PLC to make the draining cost higher as the control core, need to use special-purpose switch board; Automatic drain system and pump switch partial installation, function is single, makes complex system, and these all are not easy to the unified integrated management of colliery electric network synthetic automated system.
The degree of colliery automation depends on underground power supply system simultaneously, and therefore the protection to underground low-tension network, low voltage equipment seems particularly important.The technical development of power system Microcomputer Protection so far, and is comparatively ripe, and antijamming capability is strong, response is sensitive, quick action, and protective value is much better than the relay protection of conventional analogue formula electromagnetism.Therefore the Microcomputer Protection technology is introduced underground power supply system, improve the reliability of protective device, reduce the protective device maintenance workload, guarantee underground power supply used safety, for the colliery automation provides strong guarantee.
Like Chinese patent number is the patent of invention of CN200710185265.3; Open day is on April 9th, 2008; A kind of mine explosion-suppression and intrinsic safety type digitlization automatic drain system is disclosed; Belong to test technique automatic field under the coal mine; Purpose be to disclose a kind of can be accurately, water bunker level and start the technical scheme of the explosion-proof intrinsically safe digital automatic control system of drainage system in real time under the safety, reliable detection coal mine, it is characterized in that this system is made up of intrinsic safety type digital water level sensor I, Flameproof and intrinsically safe control loop II and intrinsic safety electric source circuit I II three parts, be one to overlap digitlization, intelligent monitoring system; Have real-time collection and storage water level signal; Monitor pump motor duty, sump flow, and control the start-stop of motor in real time, the demonstration of realization data, the functions such as warning and host computer serial communication of limiting.And according to colliery industrial security type design, the explosion-proof Exdib that is masked as can be widely used in the automatic monitoring and the automation drainage system of the shaft sump water level of general mine and highly gassy mine.This device starts, stops outside explosion-proof switch according to water level, and function is more single; Promptly this device only realizes that water level detecting, water level show, the output of control node; But outside functions such as pump motor control, switch protection and control do not relate to; Fail to realize repertoire, need use, certainly will cause system complex, security reliability to reduce with other equipment combination.
Summary of the invention
Technical problem to be solved by this invention is to solve the difficult problem in above-mentioned traditional water discharge technology; The shortcoming that overcomes prior art is with not enough; Automatic draining of a kind of mine intrinsic safety type and measuring and controlling protective device are disclosed; Automatic draining under the coal mine is combined with colliery electrical network Microcomputer Protection; Integrate and measure water level, measure multiple functions such as electric weight, automatically controlled water pump start and stop, pump motor protection, demonstration, communication, logout, make it to be configured under the coal mine intelligent end device of draining automatically and colliery electric network synthetic automated system.
According to automatic draining of a kind of mine intrinsic safety type provided by the invention and measuring and controlling protective device; Comprise monitoring and protection mainboard, the man-machine interface and the Switching Power Supply that are connected with said monitoring and protection mainboard; Said monitoring and protection mainboard and Switching Power Supply are installed in the same explosion-resistant enclosure; Said monitoring and protection mainboard comprises CPU main control unit, data acquisition circuit, A/D change-over circuit, intrinsic safety type on off state observation circuit and ON-OFF control circuit; Said intrinsic safety type on off state testing circuit is suitable for being connected with the external water switch pump; Detect the status signal of pump switch; Detected status signal transfers to said CPU main control unit, and described data acquisition circuit comprises current signal modulate circuit, voltage signal modulate circuit, leak resistance testing circuit and intrinsic safety type water level detection circuit, and said current signal modulate circuit, voltage signal modulate circuit, leak resistance testing circuit are connected with outside water pump; Detect current signal, voltage signal and the electric leakage signal of water pump respectively, detected current signal, voltage signal and electric leakage signal transfer to said CPU main control unit after said A/D change-over circuit is changed; Said intrinsic safety type water level detection circuit is suitable for being connected with outside level sensor; The sensed water level signal; Detected water level signal transfers to said CPU main control unit, and said ON-OFF control circuit is suitable for being connected with the external water switch pump, and said CPU main control unit produces the water pump control signal according to detected current signal, voltage signal, electric leakage signal and water level signal; The water pump control signal transfers to pump switch through said ON-OFF control circuit, control external water pump work.
Also have following attached technical characterictic according to automatic draining of a kind of mine intrinsic safety type provided by the invention and detection protective device:
Said monitoring and protection mainboard also comprises communication interface circuit, watchdog circuit, JTAG chip test circuit, real-time calendar clock circuit, LCD drive circuit and the intrinsic safety type key press detecting circuit that is connected with said CPU main control unit respectively; Said CPU main control unit communicates through said communication interface circuit and host computer; Said CPU main control unit is resetted by said watchdog circuit; Said CPU main control unit is tested respectively each parts through the JTAG chip test circuit, and said LCD drive circuit also is connected with said man-machine interface with said intrinsic safety type key press detecting circuit.
Said man-machine interface comprises button, LCD display and LED light, and said LCD display is connected with said LCD drive circuit, and said button is connected with said intrinsic safety type key press detecting circuit.
Said intrinsic safety type water level detection circuit is made up of intrinsic safety electric source treatment circuit, analog switch, signal generating circuit, signal acquisition circuit, filter circuit and optocoupler; Said CPU main control unit output data signal is through the dedicated tunnel of the said analog switch of said light-coupled isolation backgating; Send signal by said signal generating circuit to level sensor; Gather the output voltage of level sensor again by said signal acquisition circuit; Through said filter circuit filtering high-frequency signal, at last by said light-coupled isolation, the output data signal is to said CPU main control unit.
Each circuit module on the said monitoring and protection mainboard is arranged on the same printed circuit board.
What said communication interface circuit adopted is the RS485 communication interface.
Said intrinsic safety type on off state observation circuit and intrinsic safety type key press detecting circuit are supplied power by said Switching Power Supply.
Described LED light comprises power supply indicator, malfunction indicator lamp, transmission indicator lamp and codan lamp.
Said button comprises selection, selects, confirms, resets, starts down and stops six press keys.
Be distributed with Switching Power Supply inlet wire, switch control input-output line, level sensor inlet wire, current/voltage inlet wire and said order wire around the said monitoring and protection mainboard.
Be with the technique effect of measuring and controlling protective device according to the automatic draining of a kind of mine intrinsic safety type provided by the invention: protective device of the present invention be one integrate measurement, protection, control, demonstration, multi-functional terminal device such as communicate by letter; Automatic draining in Qi Ji down-hole and motor Microcomputer Protection can be gathered water level information in real time in one, monitoring pump motor duty; The start and stop of automatically controlled water pump; Realize earth leakage search/lockout protection, short-circuit protection, overload protection, mistake/under-voltage protection and open-phase protection, the realization data show and communicate by letter with host computer, measure accurately; Safe and reliable; Be installed in the explosion-resistant enclosure with the water pump gauge tap, and according to colliery industrial security type design, be specially adapted under the general coal mine automatic draining and electric network protection system thereof with high fiery colliery down-hole.
Description of drawings
Automatic draining of Fig. 1 mine intrinsic safety type and measuring and controlling protective device structured flowchart
Automatic draining of Fig. 2 mine intrinsic safety type and measuring and controlling protective device shape assumption diagram
Fig. 3 monitoring and protection mainboard theory diagram
Fig. 4 intrinsic safety type water level detection circuit theory diagram
Fig. 5 constructing communication network system connection layout
The member name of each figure number is called among the figure:
I-monitoring and protection mainboard II-man-machine interface III-Switching Power Supply
1, current signal modulate circuit 2, voltage signal modulate circuit
3, leak resistance testing circuit 4, intrinsic safety type water level detection circuit
5, A/D change-over circuit 6, intrinsic safety type on off state observation circuit
7, ON-OFF control circuit 8, CPU main control unit
9, real-time calendar clock circuit 10, JTAG chip test circuit
11, watchdog circuit 12, communication interface circuit
13, LCD drive circuit 14, intrinsic safety type key press detecting circuit
15, intrinsic safety electric source treatment circuit 16, analog switch
17, signal generating circuit 18, signal acquisition circuit
19, filter circuit 20, optocoupler
21, button 22, LCD display
23, LED light 24, Switching Power Supply inlet wire
25, switch control input-output line 26, level sensor inlet wire
27, current/voltage inlet wire 28, RS485 order wire
The specific embodiment
Referring to Fig. 1 and Fig. 3; Embodiment according to automatic draining of a kind of mine intrinsic safety type provided by the invention and measuring and controlling protective device; Comprise monitoring and protection mainboard I, the man-machine interface II and the Switching Power Supply III that are connected with said monitoring and protection mainboard I; Said monitoring and protection mainboard I and Switching Power Supply III are installed in the same explosion-resistant enclosure, and said monitoring and protection mainboard I is the core of automatic draining of mine intrinsic safety type and measuring and controlling protective device.Said monitoring and protection mainboard I comprises CPU main control unit 8, data acquisition circuit, A/D change-over circuit 5, intrinsic safety type on off state observation circuit 6 and ON-OFF control circuit 7; Said intrinsic safety type on off state testing circuit 6 is suitable for being connected with the external water switch pump; Detect the status signal of pump switch; Detected status signal transfers to said CPU main control unit 8; Described data acquisition circuit comprises current signal modulate circuit 1, voltage signal modulate circuit 2, leak resistance testing circuit 3 and intrinsic safety type water level detection circuit 4; Described current signal modulate circuit 1 is input as the secondary side phase current, and voltage signal modulate circuit 2 is input as secondary side line voltage and rated value is AC36V.Said current signal modulate circuit 1, voltage signal modulate circuit 2, leak resistance testing circuit 3 are connected with outside water pump; Detect current signal, voltage signal and the electric leakage signal of water pump respectively, detected current signal, voltage signal and electric leakage signal transfer to said CPU main control unit 8 after said A/D change-over circuit 5 is changed; Said intrinsic safety type water level detection circuit 4 is suitable for being connected with outside level sensor; The sensed water level signal; Detected water level signal transfers to said CPU main control unit 8, and said ON-OFF control circuit 7 is suitable for being connected with the external water switch pump, and said CPU main control unit 8 produces the water pump control signal according to detected current signal, voltage signal, electric leakage signal and water level signal; The water pump control signal transfers to pump switch through said ON-OFF control circuit 7, control external water pump work.Said Switching Power Supply III is input as AC100V voltage, is output as DC ± 12V, and the DC5V supply voltage is in the monitoring and protection mainboard is installed in the switch explosion-resistant enclosure.The present invention is connected with switch with ON-OFF control circuit 7 through intrinsic safety type on off state observation circuit 6, gathers current/voltage, on off state from switch, and to switch output controlled quentity controlled variable.Realization is to the detection and the control of switch.The present invention all combines water level detecting, water level demonstration, water pump control, pump motor protection with measuring control, correspondence with foreign country, explosion-proof switch integral body etc., and the function of realization is more comprehensive, and intelligent degree is higher, has simplified system complexity.
Referring to Fig. 1 and Fig. 3; In the foregoing description that the present invention provides; Said monitoring and protection mainboard also comprises communication interface circuit 12, watchdog circuit 11, JTAG chip test circuit 10, real-time calendar clock circuit 9, LCD drive circuit 13 and the intrinsic safety type key press detecting circuit 14 that is connected with said CPU main control unit respectively; Said CPU main control unit communicates with host computer through said communication interface circuit 12; Said CPU main control unit is resetted by said watchdog circuit 11; Said CPU main control unit is tested respectively each parts through the JTAG chip test circuit, and said LCD drive circuit 13 also is connected with said man-machine interface with said intrinsic safety type key press detecting circuit 14.
Referring to Fig. 2 and Fig. 3; In the foregoing description that the present invention provides; Said man-machine interface II comprises button 21, LCD display 22 and LED light 23, and said LCD display 22 is connected with said LCD drive circuit 13, and said button 21 is connected with said intrinsic safety type key press detecting circuit 14.Described LCD display 22 is a high speed parallel interface, is connected with the outer extension memory parallel interface of CPU through LCD drive circuit 13, draws row's pin by the monitoring and protection mainboard and is installed on the explosion-proof casing.
Referring to Fig. 1 to Fig. 3; In the foregoing description that the present invention provides; Said CPU main control unit is directly with A/D change-over circuit 5, intrinsic safety type on off state observation circuit 6, ON-OFF control circuit 7, communication interface circuit 12, watchdog circuit 11, JTAG chip test circuit 10, calendar clock circuit 9, LCD drive circuit 13, intrinsic safety type key press detecting circuit 14 are connected in real time; Gather voltage, electric current and the water level information of water pump through current signal modulate circuit 1, voltage signal modulate circuit 2, leak resistance testing circuit 3 and water level signal testing circuit 4; Monitoring pump motor duty; The information of gathering is stored in the CPU internal RAM, shows through LCD display 22, communicates by letter with host computer through communication interface circuit 12; Some significant datas such as setting parameter etc. are kept in the inner EEPROM of CPU, can make amendment to systematic parameter through button 21.When pump motor is in stopped status and detect water level above the setting high water level, output relay Signal-controlled switch starter motor; Be lower than the setting low water stage when pump motor is in starting state and detects water level, the output relay Signal-controlled switch stops motor.Simultaneously; When being in halted state, motor starts the earth leakage search/lockout protection; When being in starting state, motor starts short-circuit protection, overload protection, mistake/under-voltage protection, open-phase protection, in case the output trip signal and realize manually or automatically reset of breaking down in the compulsory exercise time by watchdog circuit 11.Said real-time calendar clock circuit 9 provides date and time information.
Referring to Fig. 4; In the foregoing description that the present invention provides; Said intrinsic safety type water level detection circuit 4 is made up of intrinsic safety electric source treatment circuit 15, analog switch 16, signal generating circuit 17, signal acquisition circuit 18, filter circuit 19 and optocoupler 20, and said CPU main control unit 8 output data signals are sent signal by said signal generating circuit 17 to level sensor through the dedicated tunnel of the said analog switch 16 of said optocoupler 20 isolation backgatings; Gather the output voltage of level sensor again by said signal acquisition circuit 18; Through said filter circuit 19 filtering high-frequency signals, to isolate by said optocoupler 20 at last, the output data signal is to said CPU main control unit 8.
Referring to Fig. 3, in the foregoing description that the present invention provides, each circuit module on the said monitoring and protection mainboard is arranged on the same printed circuit board.Said monitoring and protection mainboard integrates water level detecting, water pump control, pump motor monitoring and protection function, and the function that makes the present invention have is more comprehensive, need not to be provided with other appurtenances.
Referring to Fig. 3, in the foregoing description that the present invention provides, what said communication interface circuit 12 adopted is the RS485 communication interface.Adopt the RS485 communication interface can be better and host computer communicate, with the transferring in the host computer promptly and accurately of the data among the present invention, host computer also can better be realized Long-distance Control to the present invention.
Referring to Fig. 4, in the foregoing description that the present invention provides, said intrinsic safety type on off state observation circuit 6 is supplied power by said Switching Power Supply III with intrinsic safety type key press detecting circuit 14.The power supply of said Switching Power Supply III offers said intrinsic safety type on off state observation circuit 6 and intrinsic safety type key press detecting circuit 14 after intrinsic safety electric source treatment circuit 15 is handled.The present invention can realize centrally connected power supply, and all parts are installed concentratedly in explosion-proof casing, has improved safety.
Referring to Fig. 2, in the foregoing description that the present invention provides, described LED light 23 comprises power supply indicator, malfunction indicator lamp, transmission indicator lamp and codan lamp.Above-mentioned indicator lamp reveals to be put on explosion-proof casing, can clearly demonstrate duty.
Referring to Fig. 2, in the foregoing description that the present invention provides, said button 21 comprises selection, selects, confirms, resets, starts down and stops six press keys.Be used to revise system's setting parameter, check operation information, check logout, manually boot/stop water pump etc.
Referring to Fig. 2, in the foregoing description that the present invention provides, be distributed with Switching Power Supply inlet wire 24, switch control input-output line 25, level sensor inlet wire 26, current/voltage inlet wire 27 and said order wire 28 around the said monitoring and protection mainboard I.Above-mentioned cable passes explosion-proof casing and is connected with outside each parts.
Automatic draining of mine intrinsic safety type of the present invention and measuring and controlling protective device can be used as the intelligent end device of colliery electric network synthetic automated system; The RS485 communication interface of standard is provided; Make things convenient for the group net operation of various device under the coal mine, constructing communication network system connection layout is as shown in Figure 5, can pass through remote monitoring main frame uniform dispatching after utilizing the networking of this device; Realize the globalize intelligence draining of drainage system under the coal mine, also can move with the other-end equipment network.
Claims (10)
1. automatic draining of mine intrinsic safety type and measuring and controlling protective device; Comprise monitoring and protection mainboard (I), the man-machine interface (II) that is connected with said monitoring and protection mainboard (I) and Switching Power Supply (III); It is characterized in that: said monitoring and protection mainboard (I) and Switching Power Supply (III) are installed in the same explosion-resistant enclosure; Said monitoring and protection mainboard (I) comprises CPU main control unit (8), data acquisition circuit, A/D change-over circuit (5), intrinsic safety type on off state observation circuit (6) and ON-OFF control circuit (7); Said intrinsic safety type on off state testing circuit (6) is suitable for being connected with the external water switch pump; Detect the status signal of pump switch; Detected status signal transfers to said CPU main control unit (8); Described data acquisition circuit comprises current signal modulate circuit (1), voltage signal modulate circuit (2), leak resistance testing circuit (3) and intrinsic safety type water level detection circuit (4); Said current signal modulate circuit (1), voltage signal modulate circuit (2), leak resistance testing circuit (3) are connected with outside water pump, detect current signal, voltage signal and the electric leakage signal of water pump respectively, and detected current signal, voltage signal and electric leakage signal transfer to said CPU main control unit (8) after said A/D change-over circuit (5) is changed; Said intrinsic safety type water level detection circuit (4) is suitable for being connected with outside level sensor; The sensed water level signal; Detected water level signal transfers to said CPU main control unit (8); Said ON-OFF control circuit (7) is suitable for being connected with the external water switch pump; Said CPU main control unit (8) produces the water pump control signal according to detected current signal, voltage signal, electric leakage signal and water level signal, and the water pump control signal transfers to pump switch through said ON-OFF control circuit (7), control external water pump work.
2. automatic draining of a kind of mine intrinsic safety type as claimed in claim 1 and detection protective device; It is characterized in that: said monitoring and protection mainboard also comprises communication interface circuit (12), watchdog circuit (11), JTAG chip test circuit (10), real-time calendar clock circuit (9), LCD drive circuit (13) and the intrinsic safety type key press detecting circuit (14) that is connected with said CPU main control unit respectively; Said CPU main control unit communicates through said communication interface circuit (12) and host computer; Said CPU main control unit is resetted by said watchdog circuit (11); Said CPU main control unit is tested respectively each parts through the JTAG chip test circuit, and said LCD drive circuit (13) also is connected with said man-machine interface with said intrinsic safety type key press detecting circuit (14).
3. automatic draining of a kind of mine intrinsic safety type as claimed in claim 2 and detection protective device; It is characterized in that: said man-machine interface II comprises button (21), LCD display (22) and LED light (23); Said LCD display (22) is connected with said LCD drive circuit (13), and said button (21) is connected with said intrinsic safety type key press detecting circuit (14).
4. automatic draining of a kind of mine intrinsic safety type as claimed in claim 1 and detection protective device; It is characterized in that: said intrinsic safety type water level detection circuit (4) is made up of intrinsic safety electric source treatment circuit (15), analog switch (16), signal generating circuit (17), signal acquisition circuit (18), filter circuit (19) and optocoupler (20); Said CPU main control unit (8) output data signal is isolated the dedicated tunnel of the said analog switch of backgating (16) through said optocoupler (20); Send signal by said signal generating circuit (17) to level sensor; Gather the output voltage of level sensor again by said signal acquisition circuit (18); Through said filter circuit (19) filtering high-frequency signal, to isolate by said optocoupler (20) at last, the output data signal is to said CPU main control unit (8).
5. automatic draining of a kind of mine intrinsic safety type as claimed in claim 1 and detection protective device, it is characterized in that: each circuit module on the said monitoring and protection mainboard is arranged on the same printed circuit board.
6. automatic draining of a kind of mine intrinsic safety type as claimed in claim 2 and detection protective device, it is characterized in that: what said communication interface circuit (12) adopted is the RS485 communication interface.
7. automatic draining of a kind of mine intrinsic safety type as claimed in claim 3 and detection protective device, it is characterized in that: said intrinsic safety type on off state observation circuit (6) and intrinsic safety type key press detecting circuit (14) are supplied power by said Switching Power Supply.
8. automatic draining of a kind of mine intrinsic safety type as claimed in claim 3 and detection protective device, it is characterized in that: described LED light (23) comprises power supply indicator, malfunction indicator lamp, transmission indicator lamp and codan lamp.
9. the automatic draining of a kind of mine intrinsic safety type as claimed in claim 3 with detect protective device, it is characterized in that: said button (21) comprises selection, selects, confirms, resets, starts down and stops six press keys.
10. automatic draining of a kind of mine intrinsic safety type as claimed in claim 1 and detection protective device is characterized in that: be distributed with Switching Power Supply inlet wire (24), switch control input-output line (25), level sensor inlet wire (26), current/voltage inlet wire (27) and said order wire (28) around the said monitoring and protection mainboard I.
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| CN 201010245203 CN102345473B (en) | 2010-07-30 | 2010-07-30 | Mine intrinsic safety type automatic drainage and measurement and control protection device |
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| CN 201010245203 CN102345473B (en) | 2010-07-30 | 2010-07-30 | Mine intrinsic safety type automatic drainage and measurement and control protection device |
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| CN102735905A (en) * | 2012-06-25 | 2012-10-17 | 三一重型装备有限公司 | Intrinsically safe isolation electric leakage detection device and excavation equipment |
| CN103031886A (en) * | 2012-12-11 | 2013-04-10 | 华北电力大学（保定） | Dispatching-automation water draining system of transformer substation deep well |
| CN105005329A (en) * | 2015-07-28 | 2015-10-28 | 太原理工大学 | Mining automatic water drainage device applying carrier wave |
| CN105527900A (en) * | 2015-12-29 | 2016-04-27 | 常熟市亨达电子器材厂 | Mine deslagging and drainage host |
| CN107966919A (en) * | 2016-10-19 | 2018-04-27 | 姬志刚 | A kind of mineral electrical apparatus protective device |
| CN109799383A (en) * | 2019-03-26 | 2019-05-24 | 云南大学 | A kind of anti-electric fish prior-warning device based on Internet of Things |
| CN109826784A (en) * | 2019-03-26 | 2019-05-31 | 任若琛 | Water injection type draining pump automatic detection device |
| CN110783899A (en) * | 2019-10-14 | 2020-02-11 | 广州供电局有限公司 | Passive protection device and monitoring module and monitoring method thereof |
| CN111864903A (en) * | 2020-07-06 | 2020-10-30 | 山东东山新驿煤矿有限公司 | Multipurpose building block type network digital mining intelligent switch device |
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| CN109799383B (en) * | 2019-03-26 | 2024-02-09 | 云南大学 | Prevent electric fish early warning device based on thing networking |
| CN109826784B (en) * | 2019-03-26 | 2024-05-10 | 任若琛 | Water injection type automatic detection device for drainage pump |
| CN110783899A (en) * | 2019-10-14 | 2020-02-11 | 广州供电局有限公司 | Passive protection device and monitoring module and monitoring method thereof |
| CN110783899B (en) * | 2019-10-14 | 2022-04-01 | 广东电网有限责任公司广州供电局 | Passive protection device and monitoring module and monitoring method thereof |
| CN111864903A (en) * | 2020-07-06 | 2020-10-30 | 山东东山新驿煤矿有限公司 | Multipurpose building block type network digital mining intelligent switch device |
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| CN102345473B (en) | 2013-08-21 |
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Effective date of registration: 20190404 Address after: 215331 No. 66 Lujiazhen Ring Railway, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Bada electric (Kunshan) Co. Ltd. Address before: 325604 No. 366 Liu Le Road, Sulu Industrial Zone, Liushi Town, Yueqing City, Zhejiang Province Patentee before: Bada Electrical Appliance Co.,Ltd. |