CN110933889A - Mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC - Google Patents

Mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC Download PDF

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Publication number
CN110933889A
CN110933889A CN201911353686.1A CN201911353686A CN110933889A CN 110933889 A CN110933889 A CN 110933889A CN 201911353686 A CN201911353686 A CN 201911353686A CN 110933889 A CN110933889 A CN 110933889A
Authority
CN
China
Prior art keywords
frequency conversion
plc
conversion cabinet
fan
automatic switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911353686.1A
Other languages
Chinese (zh)
Inventor
王建军
富勤飞
潘峰
高加基
王晨辉
张晓丽
肖海乐
李嘉渊
朱立波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jarol Scientific Instrument Co Ltd
Original Assignee
Zhejiang Jarol Scientific Instrument Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Jarol Scientific Instrument Co Ltd filed Critical Zhejiang Jarol Scientific Instrument Co Ltd
Priority to CN201911353686.1A priority Critical patent/CN110933889A/en
Publication of CN110933889A publication Critical patent/CN110933889A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/02Details
    • H05K5/0217Mechanical details of casings
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/0017Casings, cabinets or drawers for electric apparatus with operator interface units
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/02Details
    • H05K5/0247Electrical details of casings, e.g. terminals, passages for cables or wiring
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/14Mounting supporting structure in casing or on frame or rack
    • H05K7/1417Mounting supporting structure in casing or on frame or rack having securing means for mounting boards, plates or wiring boards
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/14Mounting supporting structure in casing or on frame or rack
    • H05K7/1438Back panels or connecting means therefor; Terminals; Coding means to avoid wrong insertion
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136Forced ventilation, e.g. by fans
    • H05K7/20145Means for directing air flow, e.g. ducts, deflectors, plenum or guides
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136Forced ventilation, e.g. by fans
    • H05K7/20172Fan mounting or fan specifications

Abstract

The invention discloses a mutual backup automatic switching local frequency conversion cabinet realized by utilizing a PLC (programmable logic controller), which comprises a local frequency conversion cabinet main body, a cabinet door, a mounting plate, a reinforcing frame, a frequency converter, a PLC module, a wiring terminal row, a temperature and humidity detector and a fan.

Description

Mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of electric power, in particular to a mutual backup automatic switching local frequency conversion cabinet realized by utilizing a PLC (programmable logic controller).
[ background of the invention ]
The frequency conversion cabinet is a control cabinet which uses a frequency converter to drive a power device. The local frequency conversion cabinet is a frequency conversion cabinet directly installed on a working site, is usually used for controlling a nuclear power fan in a nuclear power facility, does not have a mutual backup automatic switching function, and when one fan on the site breaks down, a frequency converter can stop working to give an alarm, so that the site operation is influenced, and the construction progress is delayed, therefore, the local frequency conversion cabinet realized by using a PLC (programmable logic controller) is necessary.
[ summary of the invention ]
The invention aims to solve the problems in the prior art and provides a local frequency conversion cabinet for mutual backup automatic switching by utilizing a PLC (programmable logic controller).
In order to achieve the purpose, the invention provides a mutual backup automatic switching local frequency conversion cabinet realized by utilizing a PLC (programmable logic controller), which comprises a local frequency conversion cabinet main body, a cabinet door, a mounting plate, a reinforcing frame, a frequency converter, a PLC module, a wiring terminal row, a temperature and humidity detector and a fan, the front surface of the local frequency conversion cabinet main body is provided with a cabinet door, the interior of the local frequency conversion cabinet main body is provided with an installation plate, a reinforcing frame is arranged around the mounting plate, a frequency converter, a PLC module and a wiring terminal block are arranged on the mounting plate, the PLC module is positioned at the right side of the frequency converter, a plurality of groups of wiring terminal rows are arranged below the frequency converter, the mounting plate is also provided with a plurality of temperature and humidity detectors, the top end inside the local frequency conversion cabinet main body is provided with a fan, the output end of the frequency converter is connected with the PLC module, and the output end of the PLC module is respectively connected with the first fan and the second fan outside.
Preferably, a plurality of wire inlet holes are formed in the right side wall of the local frequency conversion cabinet body, a group of wire outlet holes are formed in the rear side wall of the local frequency conversion cabinet body, an air outlet is further formed in the front face of the local frequency conversion cabinet body and located above the cabinet door, and a dust screen is arranged on the air outlet.
Preferably, a touch screen is arranged on the cabinet door, a foldable transparent protective cover is arranged on the outer side of the touch screen, a plurality of control knobs are arranged below the touch screen, a door lock is arranged on the right side of each control knob, an air inlet is arranged below each control knob, a detachable filter screen is arranged in each air inlet, a first wiring rack is arranged on the rear side of the cabinet door, the first wiring racks are respectively matched with the touch screen and the control knobs, and a cabinet door clamping mechanism is arranged at the upper left end and the lower left end of the rear side of the cabinet door.
Preferably, the number of the control knobs is 4, and the control knobs are a first fan switch knob, a first fan mode switching knob, a second fan switch knob and a second fan mode switching knob from left to right in sequence.
Preferably, the cabinet door clamping mechanism comprises a fixed base, a sleeve, a clamping column, a contraction section, a conical hole and a reset spring, the sleeve is arranged on the fixed base, the clamping column is arranged in the sleeve, the conical contraction section is arranged at the upper end of the clamping column, the conical hole is arranged on the contact surface of the clamping column and the cabinet door, and the reset spring is arranged between the clamping column and the sleeve.
Preferably, a plurality of second chutes which are horizontally distributed are arranged in the reinforcing frame, the number of the second chutes is 3, the number of the terminal rows is 3, and the second chute is located above the terminal rows.
Preferably, the number of the temperature and humidity detectors is 4, and the 4 temperature and humidity detectors are distributed at two ends of the frequency converter and the PLC module in pairs.
Preferably, the front surface of the fan is provided with a rectangular air blowing opening, and the air blowing opening corresponds to the air outlet.
Preferably, the PLC module is internally provided with a PLC program.
The invention has the beneficial effects that:
the invention has simple structure and reasonable design, and realizes mutual backup automatic switching of the first fan and the second fan by using a PLC programming program arranged in the PLC module in a mode of respectively connecting the PLC module with the first fan and the second fan outside; the temperature and humidity in the local frequency conversion cabinet are monitored in real time by arranging a plurality of temperature and humidity detectors, and the temperature and humidity in the local frequency conversion cabinet are adjusted in real time by matching with a fan, so that internal components are prevented from being overheated; through the mode that sets up reinforcement frame and cabinet door chucking mechanism, consolidate mounting panel and cabinet door, increased the holistic shock resistance of frequency conversion cabinet on the spot.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a mutual backup automatic switching local frequency conversion cabinet implemented by using a PLC according to the present invention.
Fig. 2 is an enlarged schematic view of a cabinet door clamping mechanism in the mutual backup automatic switching local frequency conversion cabinet realized by utilizing the PLC of the invention.
Fig. 3 is a front view of the mutual backup automatic switching local frequency conversion cabinet implemented by using PLC according to the present invention.
In the figure: 1-local frequency conversion cabinet main body, 11-wire inlet hole, 12-air outlet, 13-dust screen, 2-cabinet door, 21-touch screen, 22-protective cover, 23-control knob, 24-door lock, 25-air inlet, 26-filter screen, 27-first cabling rack, 28-cabinet door clamping mechanism, 281-fixed base, 282-sleeve, 283-clamping column, 284-contraction section, 285-conical hole, 286-reset spring, 3-mounting plate, 4-reinforcing frame, 41-second cabling rack, 5-frequency converter, 6-PCL module, 7-wiring terminal row, 8-temperature and humidity detector, 9-fan and 91-air outlet.
[ detailed description ] embodiments
Referring to the attached drawings, the mutual backup automatic switching local frequency conversion cabinet realized by utilizing the PLC comprises a local frequency conversion cabinet main body 1, a cabinet door 2, a mounting plate 3, a reinforcing frame 4, a frequency converter 5, a PLC module 6, a wiring terminal row 7, a temperature and humidity detector 8 and a fan 9, the front surface of the local frequency conversion cabinet main body 1 is provided with a cabinet door 2, the interior of the local frequency conversion cabinet main body 1 is provided with an installation plate 3, a reinforcing frame 4 is arranged around the mounting plate 3, a frequency converter 5, a PLC module 6 and a wiring terminal block 7 are arranged on the mounting plate 3, the PLC module 6 is positioned at the right side of the frequency converter 5, a plurality of groups of wiring terminal strips 7 are arranged below the frequency converter 5, the mounting plate 3 is also provided with a plurality of temperature and humidity detectors 8, the top end inside the local frequency conversion cabinet main body 1 is provided with a fan 9, the output end of the frequency converter 5 is connected with the PLC module 6, and the output end of the PLC module 6 is respectively connected with the first fan and the second fan outside.
The frequency conversion cabinet comprises a cabinet door 2, a frequency conversion cabinet body 1, a rear side wall of the frequency conversion cabinet body 1, a plurality of wire inlet holes 11, an air outlet 12, a dust screen 13 and a dust screen 13, wherein the right side wall of the frequency conversion cabinet body 1 is provided with the wire outlet holes, the front side of the frequency conversion cabinet body 1 is provided with the air outlet 12, and the air outlet 12 is positioned above the cabinet door 2.
Wherein, be equipped with touch-sensitive screen 21 on cabinet door 2, the touch-sensitive screen 21 outside is equipped with the transparent visor 22 that can open and shut, touch-sensitive screen 21 below is equipped with a plurality of control knob 23, control knob 23 right side is equipped with lock 24, control knob 23 below is equipped with air inlet 25, be equipped with detachable filter screen 26 in the air inlet 25, the rear side of cabinet door 2 is equipped with first chute 27, first chute 27 cooperatees with touch-sensitive screen 21 and control knob 23 respectively, the upper left end and the lower left end of cabinet door 2 rear side all are equipped with cabinet door chucking mechanism 28.
The number of the control knobs 23 is 4, and the control knobs 23 sequentially comprise a first fan switch knob, a first fan mode switching knob, a second fan switch knob and a second fan mode switching knob from left to right.
The cabinet door clamping mechanism 28 comprises a fixed base 281, a sleeve 282, a clamping column 283, a contraction section 284, a conical hole 285 and a reset spring 286, wherein the fixed base 281 is provided with the sleeve 282, the clamping column 283 is arranged in the sleeve 282, the conical contraction section 284 is arranged at the upper end of the clamping column 283, the conical hole 285 is arranged on the contact surface of the clamping column 283 and the cabinet door 2, and the reset spring 286 is arranged between the clamping column 283 and the sleeve 282.
A plurality of second chutes 41 which are horizontally distributed are arranged in the reinforcing frame 4, the number of the second chutes 41 is 3, the number of the terminal block 7 is 3, and the second chute 41 is located above the terminal block 7.
The number of the temperature and humidity detectors 8 is 4, and the 4 temperature and humidity detectors 8 are distributed at two ends of the frequency converter 5 and the PLC module 6 in pairs.
The front of the fan 9 is provided with a rectangular blowing opening 91, and the blowing opening 91 corresponds to the air outlet 12.
Wherein, PLC programming program is arranged in the PLC module 6.
Compared with the prior art, the invention has simple structure and reasonable design, and realizes mutual spare power automatic switching of the first fan and the second fan by utilizing a PLC programming program arranged in the PLC module 6 in a mode of respectively connecting the PLC module 6 with the first fan and the second fan outside; the temperature and humidity in the local frequency conversion cabinet are monitored in real time by arranging a plurality of temperature and humidity detectors 8, and the temperature and humidity in the local frequency conversion cabinet are adjusted in real time by matching with a fan 9, so that internal components are prevented from being overheated; through the mode that sets up reinforcing frame 4 and cabinet door chucking mechanism 28, consolidate mounting panel 3 and cabinet door 2, increased the holistic shock resistance of frequency conversion cabinet on the spot.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims (9)

1. The utility model provides an utilize mutual spare power automatic switching local frequency conversion cabinet that PLC realized which characterized in that: the novel frequency conversion cabinet comprises a frequency conversion cabinet body (1), a cabinet door (2), a mounting plate (3), a reinforcing frame (4), a frequency converter (5), a PLC module (6), a wiring terminal row (7), a temperature and humidity detector (8) and a fan (9), wherein the cabinet door (2) is arranged on the front side of the frequency conversion cabinet body (1), the mounting plate (3) is arranged inside the frequency conversion cabinet body (1), the reinforcing frame (4) is arranged around the mounting plate (3), the frequency converter (5), the PLC module (6) and the wiring terminal row (7) are arranged on the mounting plate (3), the PLC module (6) is positioned on the right side of the frequency converter (5), a plurality of groups of wiring terminal rows (7) are arranged below the frequency converter (5), the temperature and humidity detectors (8) are also arranged on the mounting plate (3), and the fan (9) is arranged at the top end inside the frequency, the output end of the frequency converter (5) is connected with the PLC module (6), and the output end of the PLC module (6) is connected with the first fan and the second fan outside respectively.
2. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 1, characterized in that: be equipped with a plurality of entrance holes (11) on the right side wall of frequency conversion cabinet main part (1) on the spot, be equipped with a set of wire hole on the rear side wall of frequency conversion cabinet main part (1) on the spot, the front of frequency conversion cabinet main part (1) on the spot still is equipped with air outlet (12), air outlet (12) are located cabinet door (2) top, be equipped with dust screen (13) on air outlet (12).
3. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 1, characterized in that: be equipped with touch-sensitive screen (21) on cabinet door (2), touch-sensitive screen (21) outside is equipped with transparent visor (22) that can open and shut, touch-sensitive screen (21) below is equipped with a plurality of control knob (23), control knob (23) right side is equipped with lock (24), control knob (23) below is equipped with air inlet (25), be equipped with detachable filter screen (26) in air inlet (25), the rear side of cabinet door (2) is equipped with first chute (27), first chute (27) cooperate with touch-sensitive screen (21) and control knob (23) respectively, the upper left end and the lower left end of cabinet door (2) rear side all are equipped with cabinet door chucking mechanism (28).
4. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 3, wherein: the number of the control knobs (23) is 4, and the control knobs (23) are a first fan switch knob, a first fan mode switching knob, a second fan switch knob and a second fan mode switching knob from left to right in sequence.
5. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 3, wherein: cabinet door chucking mechanism (28) are equipped with sleeve (282) including unable adjustment base (281), sleeve (282), card post (283), shrink section (284), circular cone hole (285) and reset spring (286) on unable adjustment base (281), be equipped with card post (283) in sleeve (282), card post (283) upper end is equipped with conical shrink section (284), be equipped with circular cone hole (285) on the contact surface of card post (283) and cabinet door (2), be equipped with reset spring (286) between card post (283) and sleeve (282).
6. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 1, characterized in that: a plurality of second wiring racks (41) which are horizontally distributed are arranged in the reinforcing frame (4), the number of the second wiring racks (41) is 3, the number of the wiring terminal rows (7) is 3, and the second wiring racks (41) are located above the wiring terminal rows (7).
7. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 1, characterized in that: the number of the temperature and humidity detectors (8) is 4, and the 4 temperature and humidity detectors (8) are distributed at two ends of the frequency converter (5) and the PLC module (6) in pairs.
8. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 2, characterized in that: the front of the fan (9) is provided with a blowing opening (91), the blowing opening (91) is rectangular, and the blowing opening (91) corresponds to the air outlet (12).
9. The mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC as claimed in claim 1, characterized in that: and a PLC programming program is arranged in the PLC module (6).
CN201911353686.1A 2019-12-25 2019-12-25 Mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC Pending CN110933889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911353686.1A CN110933889A (en) 2019-12-25 2019-12-25 Mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911353686.1A CN110933889A (en) 2019-12-25 2019-12-25 Mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC

Publications (1)

Publication Number Publication Date
CN110933889A true CN110933889A (en) 2020-03-27

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ID=69860846

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CN201911353686.1A Pending CN110933889A (en) 2019-12-25 2019-12-25 Mutual backup automatic switching local frequency conversion cabinet realized by utilizing PLC

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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112241140A (en) * 2020-10-28 2021-01-19 浙江佳乐科仪股份有限公司 Efficient PLC detection device
CN112255962A (en) * 2020-10-30 2021-01-22 浙江佳乐科仪股份有限公司 PLC programming system based on artificial intelligence
CN112867308A (en) * 2020-12-28 2021-05-28 驻马店职业技术学院 Long-range online english teaching server rack of easily laying wire

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US9024551B2 (en) * 2012-12-31 2015-05-05 General Electric Company Braking and auxiliary power converter
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CN205921263U (en) * 2016-07-29 2017-02-01 昆山佳得可自动化设备有限公司 High -efficient heat -radiating power distribution cabinet
CN208210488U (en) * 2018-06-05 2018-12-07 厦门巨创科技有限公司 A kind of frequency conversion tank
CN208589648U (en) * 2018-06-10 2019-03-08 无锡军工智能电气股份有限公司 A kind of mining moisture-proof high-tension switch cabinet
CN109661130A (en) * 2019-01-17 2019-04-19 广东扬民机电设备工程有限公司 A kind of highly effective energy-conserving environmental-protecting type electromechanical integration specialized control equipment
CN209044489U (en) * 2019-01-11 2019-06-28 山东超越数控电子股份有限公司 A kind of device that detection computer cabinet door is effectively closed
US20190294202A1 (en) * 2018-03-26 2019-09-26 Denso Wave Incorporated Input and output apparatus provided with microcomputer powered from dc-dc converter and configured to operate on clock signal

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201321422Y (en) * 2008-12-25 2009-10-07 中国新型建筑材料工业杭州设计研究院 Control system of pure oxygen combustion float glass process glass melting furnace fan
US9024551B2 (en) * 2012-12-31 2015-05-05 General Electric Company Braking and auxiliary power converter
CN203340491U (en) * 2013-07-30 2013-12-11 成都奥图科技有限责任公司 Military chassis
CN204929470U (en) * 2015-09-28 2015-12-30 宁波市岭登电器有限公司 System control cabinet
CN205921263U (en) * 2016-07-29 2017-02-01 昆山佳得可自动化设备有限公司 High -efficient heat -radiating power distribution cabinet
US20190294202A1 (en) * 2018-03-26 2019-09-26 Denso Wave Incorporated Input and output apparatus provided with microcomputer powered from dc-dc converter and configured to operate on clock signal
CN208210488U (en) * 2018-06-05 2018-12-07 厦门巨创科技有限公司 A kind of frequency conversion tank
CN208589648U (en) * 2018-06-10 2019-03-08 无锡军工智能电气股份有限公司 A kind of mining moisture-proof high-tension switch cabinet
CN209044489U (en) * 2019-01-11 2019-06-28 山东超越数控电子股份有限公司 A kind of device that detection computer cabinet door is effectively closed
CN109661130A (en) * 2019-01-17 2019-04-19 广东扬民机电设备工程有限公司 A kind of highly effective energy-conserving environmental-protecting type electromechanical integration specialized control equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112241140A (en) * 2020-10-28 2021-01-19 浙江佳乐科仪股份有限公司 Efficient PLC detection device
CN112255962A (en) * 2020-10-30 2021-01-22 浙江佳乐科仪股份有限公司 PLC programming system based on artificial intelligence
CN112867308A (en) * 2020-12-28 2021-05-28 驻马店职业技术学院 Long-range online english teaching server rack of easily laying wire
CN112867308B (en) * 2020-12-28 2022-04-26 驻马店职业技术学院 Long-range online english teaching server rack of easily laying wire

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Application publication date: 20200327

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