CN113611091A - Thing networking security protection system - Google Patents

Thing networking security protection system Download PDF

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Publication number
CN113611091A
CN113611091A CN202110901367.0A CN202110901367A CN113611091A CN 113611091 A CN113611091 A CN 113611091A CN 202110901367 A CN202110901367 A CN 202110901367A CN 113611091 A CN113611091 A CN 113611091A
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CN
China
Prior art keywords
internet
ring
security
round hole
security device
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Granted
Application number
CN202110901367.0A
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Chinese (zh)
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CN113611091B (en
Inventor
吴昊
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.)
Guangdong Flying Shenzhou Technology Co ltd
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Harbin Yimu Technology Co ltd
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Priority to CN202110901367.0A priority Critical patent/CN113611091B/en
Publication of CN113611091A publication Critical patent/CN113611091A/en
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Publication of CN113611091B publication Critical patent/CN113611091B/en
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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18Status alarms
    • G08B21/20Status alarms responsive to moisture
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/12Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/72Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/72409User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
    • H04M1/72415User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories for remote control of appliances
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Emergency Lowering Means (AREA)
  • Alarm Systems (AREA)

Abstract

The invention relates to the application field of the Internet of things, in particular to a security system of the Internet of things. The utility model provides a thing networking security protection system, has contained server, water sensor, security protection device and cell-phone, the water sensor transmits danger signal for the server, and the server transmits danger signal for the cell-phone, and the cell-phone controls the security protection device and carries out the security protection. The security device has contained groove box, round hole, ring and annular edge, and the groove box is settled and is being placed chemical agent region, has linked firmly the round hole on the groove box, and the lower part position of round hole is connected the sewer, and the downside position of ring has linked firmly the annular edge, and the annular edge on the ring is inserted in round hole department. The security device has still contained notch and lug, and both ends have all linked firmly the notch around the round hole, and both ends have all linked firmly the lug around the annular edge, and the lug can insert the notch.

Description

Thing networking security protection system
Technical Field
The invention relates to the application field of the Internet of things, in particular to a security system of the Internet of things.
Background
The internet of things is that any object or process needing monitoring, connection and interaction is collected in real time through various devices and technologies such as various information sensors, radio frequency identification technologies, global positioning systems, infrared sensors, laser scanners and the like, various required information such as sound, light, heat, electricity, mechanics, chemistry, biology, positions and the like is collected, ubiquitous connection of objects and objects, and ubiquitous connection of objects and people are realized through various possible network accesses, and intelligent sensing, identification and management of the objects and the processes are realized. The internet of things is an information bearer based on the internet, a traditional telecommunication network and the like, and all common physical objects which can be independently addressed form an interconnected network.
In the chemistry experiment room, the people is not in the chemistry experiment room, if take place upstairs fitment and shake chemical agent easily, this chemical agent that just can topple over to the accident through the thing networking carries out the security protection.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the security system of the Internet of things, which has the beneficial effect that the chemical agents accidentally toppled over can be secured through the Internet of things.
The utility model provides a thing networking security protection system, has contained server, water sensor, security protection device and cell-phone, the water sensor transmits danger signal for the server, and the server transmits danger signal for the cell-phone, and the cell-phone controls the security protection device and carries out the security protection.
The security device has contained groove box, round hole, ring and annular edge, and the groove box is settled and is being placed chemical agent region, has linked firmly the round hole on the groove box, and the lower part position of round hole is connected the sewer, and the downside position of ring has linked firmly the annular edge, and the annular edge on the ring is inserted in round hole department.
The security device has still contained notch and lug, and both ends have all linked firmly the notch around the round hole, and both ends have all linked firmly the lug around the annular edge, and the lug can insert the notch.
The security device further comprises an outer ring, connecting columns and an inner ring, wherein the inner ring of the outer ring is connected with the inner ring through the connecting columns, and the outer ring is fixedly connected to the inner ring of the ring.
The security protection device has still contained short shaft groove, square seat and minor axis, and both ends have all linked firmly the square seat about the ring upside position, have all linked firmly the short shaft groove on two square seats, and both ends have all linked firmly the minor axis about the outer loop, and two minor axes rotate respectively to be connected in two short shaft groove departments.
The security device also comprises a blocking screw, the upper parts of the two square seats are in threaded connection with the blocking screw, and the blocking screw is located on the upper side of the short shaft.
The security device also comprises L-shaped rods, and the lower side of the outer ring is fixedly connected with a plurality of L-shaped rods in an annular manner.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of an Internet of things security system;
FIG. 2 is a first schematic structural diagram of a security device;
FIG. 3 is a schematic structural diagram II of the security device;
FIG. 4 is a schematic diagram I of a part of the structure of the security device;
FIG. 5 is a schematic diagram of a part of the structure of the security device;
FIG. 6 is a first schematic structural view of the cell;
FIG. 7 is a second schematic structural view of the cell box;
FIG. 8 is a first schematic structural diagram of a ring and an outer ring;
FIG. 9 is a second schematic structural view of the ring and the outer ring;
FIG. 10 is a schematic view of the vertical axis;
FIG. 11 is a first structural view of a door frame;
FIG. 12 is a second schematic structural view of the gantry;
FIG. 13 is a first schematic structural view of a water absorbent cotton block;
FIG. 14 is a second schematic view of the structure of the absorbent cotton block.
In the figure: a pod cartridge 101; block edge 102; a circular hole 103; notches 104; a motor I105; a stopper 106; a horizontal axis 107;
a circular ring 201; an annular rim 202; a stopper screw 203; a stub shaft groove 204; a square base 205; a bump 206; an L-shaped rod 207;
an outer ring 301; a connecting post 302; an inner ring 303; a short axis 304;
a vertical axis 401; a soft brush 402; a telescopic rod I403; a vertical rod 404; a lifting bar 405; motor II 406;
a gantry 501; a fixed sloping plate 502; a dynamic sloping plate 503; a cross bar 504; a connecting bar 505; a telescopic rod II 506; a fixing sheet 507;
a water absorbent cotton block 601; a wide portion 602; a strip groove 603.
Detailed Description
For example, referring to FIG. 1, there is shown an embodiment of the present invention for solving the problem of chemical agents being adsorbed and discharged into the sewage through the security device when the chemical agents are accidentally dumped,
because thing networking security protection system, including server, water sensor, security protection device and cell-phone, the water sensor can transmit danger signal for the server, and the server transmits danger signal for the cell-phone that the user used, and cell-phone control security protection device carries out the security protection operation, when chemical accident emptys, can adsorb chemical and arrange into the sewer through the security protection device.
Referring to fig. 2-9, for example, there is shown an embodiment of the present invention that solves the problem of providing a blocking implement at the ring 201,
because the security protection device includes groove box 101, the round hole 103, ring 201 and annular are along 202, groove box 101 sets up and places the chemical agent region in the laboratory, it encloses the fender to place the regional periphery of chemical agent, prevent that the chemical agent from spilling the wider position of back flow direction, round hole 103 sets up on groove box 101, the sewer has been connected to the downside of round hole 103, the downside fixed connection of ring 201 has the annular along 202, the annular on the ring 201 is inserted in round hole 103 department along 202, and then the chemical agent that unexpected emptys can flow to groove box 101 and from groove box discharging into 101 sewer, ring 201 department can set up the utensil that blocks, be used for blockking the cotton that uses in the chemical experiment, article such as toilet paper.
Referring to fig. 2-9, for example, embodiments of the present invention are shown that address the problem of preventing the ring 201 from escaping the pod cartridge 101,
because the security device still includes notch 104 and lug 206, two notches 104 set up respectively at the front and back both ends of round hole 103, two lugs 206 set up respectively at the front and back both ends of annular edge 202, after annular edge 202 on ring 201 inserted round hole 103 department, two lugs 206 need insert from two notches 104, then rotating ring 201 and driving two lugs 206 and leave the position of two notches 104, at this moment two lugs 206 can keep off the downside at groove box 101, and then prevent that ring 201 from breaking away from groove box 101.
Referring to fig. 8-9, for example, there is shown an embodiment of the present invention for solving the problem of blocking cotton, toilet paper, etc. used in chemical experiments,
because security protection device still includes outer loop 301, spliced pole 302 and inner ring 303, outer loop 301 and inner ring 303 coaxial setting, the inner circle of outer loop 301 is connected with inner ring 303 through a plurality of spliced poles 302, fills up the inner circle of ring 201 through outer loop 301, inner ring 303 and a plurality of spliced pole 302, blocks article such as cotton, toilet paper that use in the chemical experiment through outer loop 301, inner ring 303 and a plurality of spliced pole 302.
Referring to fig. 8, for example, an embodiment of the present invention is shown that solves the problem of removing the outer ring 301 for cleaning,
because security protection device still includes minor axis groove 204, square seat 205 and minor axis 304, two square seat 205 both ends about the ring 201 upside of fixed connection respectively, all set up minor axis groove 204 on every square seat 205, both ends have all set up minor axis 304 about outer loop 301, two minor axes 304 rotate respectively and connect in two minor axis grooves 204 departments, and then make outer loop 301 can use the common axis of two minor axes 304 to rotate as the axle, at this moment can overturn outer loop 301, after the bonding wound flocculent chemical agent on outer loop 301 and the inner ring 303, be convenient for clear up outer loop 301 and inner ring 303 more, two minor axes 304 can be taken off from minor axis groove 204, and be convenient for take off outer loop 301 and clear up.
Referring to fig. 8-9, for example, there is shown an embodiment of the present invention that solves the problem of allowing the outer ring 301 to rotate only about the common axis of the two stub shafts 304, without being free to disengage from the inner ring of the ring 201,
because thing networking security protection system still includes keeping off screw 203, and the upper portion threaded connection of square seat 205 has keeping off screw 203, keeps off screw 203 and can keep off the upside at minor axis 304, and then makes two minor axes 304 can not break away from minor axis groove 204, and then makes outer loop 301 can only use the common axis of two minor axes 304 to rotate as the axle at this moment, and can not break away from the inner circle of ring 201 at will.
Referring to fig. 9, for example, there is shown an embodiment of the present invention that solves the problem of preventing the outer ring 301 from falling into the sewer,
because security protection device still includes L shape pole 207, a plurality of L shape poles 207 are the annular setting in the downside of outer loop 301, and then block outer loop 301, prevent that outer loop 301 from falling into the sewer.
Referring to fig. 1-10, for example, there is shown an embodiment of the present invention that solves the problem of preventing chemicals from being discharged into a sewer after they are dumped,
because thing networking security protection system still includes vertical axis 401, soft brush 402, lifting bar 405 and motor II406, the top of inner ring 303 is provided with vertical axis 401, vertical axis 401 is vertical to be set up, be provided with a plurality of soft brushes 402 from last to down on the vertical axis 401, motor II406 has been set up on the lifting bar 405, the upper portion fixed connection of vertical axis 401 is on the output shaft of motor II406, motor II406 drives vertical axis 401 and a plurality of soft brush 402 and uses the axis of vertical axis 401 to rotate as the axle, at this moment reciprocate vertical axis 401 can make vertical axis 401 insert in the inner ring 303, and make a plurality of soft brushes 402 reciprocate in inner ring 303 department, and then dredge inner ring 303 department and sewer, can't discharge into the sewer after preventing that chemical agent from empting.
Referring to fig. 6-7, for example, embodiments of the present invention are shown that address the problem of chemical agent flowing to the rim 102 and from the rim 102 to the housing 101 as it is poured,
since the security device further comprises the square edge 102, the upper edge of the tank 101 is provided with the square edge 102, and the square edge 102 can facilitate the tank 101 to be mounted at the lowest position of the plane, so that the square edge 102 presses the lowest position of the plane, and when the chemical agent is poured, the chemical agent flows to the square edge 102 and flows from the square edge 102 to the tank 101.
Referring to fig. 10, for example, an embodiment of the present invention is shown that solves the problem of moving a plurality of soft brushes 402 up and down at the inner ring 303,
because security protection device still includes telescopic link I403 and pole setting 404, square frame edge 102 goes up fixedly connected with pole setting 404, the vertical sliding connection in pole setting 404 in rear portion of lifter bar 405, be provided with telescopic link I403 on pole setting 404, the expansion end setting of telescopic link I403 is on lifter bar 405, telescopic link I403 drives lifter bar 405 vertical slip on pole setting 404 when flexible, and then makes the vertical slip of vertical axis 401 drive a plurality of soft brushes 402 and reciprocate in inner ring 303 department.
The security device further comprises a motor I105, a stop block 106, a cross shaft 107, a door-shaped frame 501, a fixed inclined plate 502 and a water absorption cotton block 601, the right part of the frame edge 102 is fixedly connected with the motor I105, the cross shaft 107 is fixedly connected to an output shaft of the motor I105, one end of the door-shaped frame 501 is fixedly connected to the cross shaft 107, a plurality of fixed inclined plates 502 are arranged on the cross shaft 107 in parallel, the water absorption cotton blocks 601 are bonded to the plurality of fixed inclined plates 502, the stop block 106 is fixedly connected to the frame edge 102, and the stop block 106 is stopped at the left side of the door-shaped frame 501.
Referring to fig. 1-14, for example, there is shown an embodiment of the present invention that solves the problem of preventing the last small amount of chemical agent from being stored on a flat surface all the time and not flowing into the sewer,
motor I105 drives cross axle 107 when rotating and rotates, and then drives door-shaped frame 501 and rotate, control door-shaped frame 501 rotates to vertical state or horizontality, contact with dog 106 after door-shaped frame 501 rotates to vertical state, dog 106 blocks door-shaped frame 501, prevent that door-shaped frame 501 from rotating too big, door-shaped frame 501 is in vertical state at ordinary times, after chemical topples over, rotate door-shaped frame 501 to horizontality through cell-phone remote control, at this moment make cotton 601 that absorbs water and desktop or place the plane of chemical contact, at this moment the cotton 601 that absorbs water can adsorb chemical, prevent that last a small amount of chemical from storing on the plane not flowing into the sewer always.
The security device further comprises a wide portion 602 and a strip-shaped groove 603, the lower end of the water absorption cotton block 601 is provided with the wide portion 602, and the lower side of the wide portion 602 is provided with the strip-shaped grooves 603 from front to back.
Referring to fig. 1-14, for example, there is shown an embodiment of the present invention that addresses the problem of more easily drawing chemical into a absorbent pledget 601,
the wide part 602 of cotton piece 601 downside that absorbs water has improved the cotton piece 601 that absorbs water and the planar area of contact in chemical place, is convenient for more inhale cotton piece 601 that absorbs water with chemical, and a plurality of bar grooves 603 are convenient for more inhale cotton piece 601 that absorbs water with chemical.
The security device still includes moves swash plate 503, horizontal bar 504, connecting strip 505, telescopic link II506 and stationary blade 507, door-shaped frame 501's front side fixedly connected with stationary blade 507, horizontal sliding connection has horizontal bar 504 on the stationary blade 507, the expansion end fixed connection of fixedly connected with telescopic link II506 on the stationary blade 507 is on horizontal bar 504, the right side of deciding swash plate 502 is provided with swash plate 503, the front end fixed connection of swash plate 503 has connecting strip 505, the front end fixed connection of connecting strip 505 is on horizontal bar 504, the cotton piece 601 that absorbs water is located decides swash plate 502 and moves between the swash plate 503, decide swash plate 502, move swash plate 503, the cotton piece 601 that absorbs water can set up a plurality ofly.
Referring to fig. 1-14, for example, there is shown an embodiment of the present invention that addresses the problem of facilitating evacuation of the chemical from the absorbent cotton block 601, facilitating underside adsorption,
after a plurality of cotton piece 601 that absorb water have inhaled water, rotate door-shaped frame 501 to vertical state, then telescopic link II506 shortens to drive horizontal bar 504 and removes, and then drives a plurality of swash plates 503 and be close to respectively to a plurality of swash plates 502 and extrude a plurality of cotton piece 601 that absorb water, and the chemical agent on the cotton piece 601 that absorb water after the extrusion flows into groove box 101, is convenient for empty the chemical agent on the cotton piece 601 that absorb water, is convenient for adsorb next time.

Claims (10)

1. The utility model provides a thing networking security protection system, includes server, water sensor, security protection device and cell-phone, its characterized in that: the water sensor transmits a dangerous signal to the server, the server transmits the dangerous signal to the mobile phone, and the mobile phone controls the security device to perform security.
2. The internet of things security system according to claim 1, characterized in that: the security device comprises a groove box (101), a round hole (103), a circular ring (201) and an annular edge (202), the groove box (101) is arranged in a chemical agent placing area, the round hole (103) is arranged on the groove box (101), the lower portion of the round hole (103) is connected with a sewer, the annular edge (202) is arranged on the lower side of the circular ring (201), and the annular edge (202) on the circular ring (201) is inserted into the position of the round hole (103).
3. The internet of things security system according to claim 2, characterized in that: the security device further comprises a notch (104) and a convex block (206), the notches (104) are arranged at the front end and the rear end of the round hole (103), the convex blocks (206) are arranged at the front end and the rear end of the annular edge (202), and the convex blocks (206) can be inserted into the notches (104).
4. The internet of things security system according to claim 2, characterized in that: the security device further comprises an outer ring (301), connecting columns (302) and an inner ring (303), the inner ring of the outer ring (301) is connected with the inner ring (303) through the connecting columns (302), and the outer ring (301) is arranged at the inner ring position of the circular ring (201).
5. The Internet of things security system according to claim 4, characterized in that: the security device further comprises a short shaft groove (204), a square seat (205) and short shafts (304), the left end and the right end of the upper side of the circular ring (201) are fixedly connected with the square seat (205), the two square seats (205) are respectively provided with the short shaft groove (204), the left end and the right end of the outer ring (301) are fixedly connected with the short shafts (304), and the two short shafts (304) are respectively connected to the two short shaft grooves (204) in a rotating mode.
6. The internet of things security system according to claim 5, characterized in that: the security device further comprises a blocking screw (203), the upper parts of the two square seats (205) are in threaded connection with the blocking screw (203), and the blocking screw (203) is located on the upper side of the short shaft (304).
7. The internet of things security system according to any one of claims 4-6, wherein: the security device further comprises an L-shaped rod (207), and a plurality of L-shaped rods (207) are annularly arranged on the lower side of the outer ring (301).
8. The internet of things security system according to claim 7, characterized in that: the security device further comprises a vertical shaft (401), soft brushes (402), lifting strips (405) and a motor II (406), the vertical shaft (401) is vertically arranged above the inner ring (303), the plurality of soft brushes (402) are arranged on the vertical shaft (401), the motor II (406) is fixedly connected to the lifting strips (405), and an output shaft of the motor II (406) is fixedly connected to the upper portion of the vertical shaft (401).
9. The internet of things security system according to claim 8, wherein: the security device further comprises a square frame edge (102), and the square frame edge (102) is arranged on the upper edge of the groove box (101).
10. The internet of things security system according to claim 9, wherein: the security device further comprises a telescopic rod I (403) and a vertical rod (404), the vertical rod (404) is fixedly connected to the square frame edge (102), the rear portion of the lifting bar (405) is vertically connected to the vertical rod (404) in a sliding mode, the telescopic rod I (403) is fixedly connected to the vertical rod (404), and the movable end of the telescopic rod I (403) is fixedly connected to the lifting bar (405).
CN202110901367.0A 2021-08-06 2021-08-06 Internet of things security system Active CN113611091B (en)

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Application Number Priority Date Filing Date Title
CN202110901367.0A CN113611091B (en) 2021-08-06 2021-08-06 Internet of things security system

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Application Number Priority Date Filing Date Title
CN202110901367.0A CN113611091B (en) 2021-08-06 2021-08-06 Internet of things security system

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CN113611091B CN113611091B (en) 2023-09-29

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203465575U (en) * 2013-08-22 2014-03-05 福州众梦达智能科技有限公司 Intelligent security linkage processing system based on internet of things (IOT)
CN205430481U (en) * 2016-03-21 2016-08-03 夏辉丽 Apartment security protection system based on thing networking
CN207148610U (en) * 2017-08-28 2018-03-27 西安莱奥信息科技有限公司 A kind of protected against the effects of immersion system
CN210553695U (en) * 2019-07-02 2020-05-19 合肥优雅广告有限公司 Indoor pictorial machine blowing device
WO2021014416A1 (en) * 2019-07-24 2021-01-28 Talentone Development Ltd. Cleaning heads and vacuum cleaners comprising same
CN113060854A (en) * 2021-03-03 2021-07-02 米核(南京)电子科技有限公司 Pretreatment filtering device and filtering method for mercury-containing wastewater treatment process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203465575U (en) * 2013-08-22 2014-03-05 福州众梦达智能科技有限公司 Intelligent security linkage processing system based on internet of things (IOT)
CN205430481U (en) * 2016-03-21 2016-08-03 夏辉丽 Apartment security protection system based on thing networking
CN207148610U (en) * 2017-08-28 2018-03-27 西安莱奥信息科技有限公司 A kind of protected against the effects of immersion system
CN210553695U (en) * 2019-07-02 2020-05-19 合肥优雅广告有限公司 Indoor pictorial machine blowing device
WO2021014416A1 (en) * 2019-07-24 2021-01-28 Talentone Development Ltd. Cleaning heads and vacuum cleaners comprising same
CN113060854A (en) * 2021-03-03 2021-07-02 米核(南京)电子科技有限公司 Pretreatment filtering device and filtering method for mercury-containing wastewater treatment process

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