CN111407034A - Intelligent identification equipment for safety helmet - Google Patents

Intelligent identification equipment for safety helmet Download PDF

Info

Publication number
CN111407034A
CN111407034A CN202010320144.0A CN202010320144A CN111407034A CN 111407034 A CN111407034 A CN 111407034A CN 202010320144 A CN202010320144 A CN 202010320144A CN 111407034 A CN111407034 A CN 111407034A
Authority
CN
China
Prior art keywords
safety helmet
module
cleaning plate
drive gear
camera
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
CN202010320144.0A
Other languages
Chinese (zh)
Inventor
杜强
姚利
张小雷
郎泽萌
刘东岐
洪楠
陆畅
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.)
Cgn Dangtu New Energy Co ltd
Original Assignee
Cgn Dangtu New Energy 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 Cgn Dangtu New Energy Co ltd filed Critical Cgn Dangtu New Energy Co ltd
Priority to CN202010320144.0A priority Critical patent/CN111407034A/en
Publication of CN111407034A publication Critical patent/CN111407034A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/0406Accessories for helmets
    • A42B3/0433Detecting, signalling or lighting devices
    • A42B3/0466Means for detecting that the user is wearing a helmet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00Cleaning by methods involving the use of tools
    • B08B1/10Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/14Wipes; Absorbent members, e.g. swabs or sponges
    • B08B1/143Wipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00Cleaning by methods involving the use of tools
    • B08B1/30Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members

Landscapes

  • Helmets And Other Head Coverings (AREA)

Abstract

The invention discloses intelligent identification equipment for a safety helmet, which comprises a shell, wherein a battery is electrically connected with an infrared inductor, a camera is in signal connection with a processor assembly, the processor assembly is in signal connection with a controller, the controller is in signal connection with a loudspeaker, a communication module and a delay relay respectively, and the delay relay is electrically connected with a conductive column; a hollow cleaning plate is arranged on the outer wall of the shell, and a magnetism generating coil is connected to the conductive column; the one end that the column spinner kept away from drive gear is embedded to be provided with and cleans the cotton, the one side that the drive gear kept away from drive gear meshes with the rack mutually. When the intelligent identification equipment for the safety helmet is not used, the hollow cleaning plate can drive the scrubbing cotton to move, and the scrubbing cotton also can rotate, so that dust attached to the camera, the infrared sensor and the loudspeaker housing is thoroughly cleaned, the identification accuracy is prevented from being influenced by the dust, and the intelligent identification equipment for the safety helmet is very worthy of popularization.

Description

Intelligent identification equipment for safety helmet
Technical Field
The invention relates to the technical field of identification, in particular to intelligent identification equipment for a safety helmet.
Background
In the prior art, an intelligent monitoring system worn on a safety helmet with application number "201820500310.3" comprises a plurality of cameras, a plurality of intelligent video analysis modules, a plurality of TCP network modules, a central server, a safety helmet characteristic identification server, a video storage server, an alarm management server, a GSM module, a computer terminal and a mobile phone terminal, wherein each camera is connected with a corresponding intelligent video analysis module, each intelligent video analysis module is connected with a corresponding TCP network module, each TCP network module is connected with the central server, the central server is connected with a safety helmet model analysis server and the video storage server, the safety helmet model analysis server is connected with the alarm management server, the alarm management server is connected with the GSM module and sends alarm information to the mobile phone terminal through the GSM module, the computer terminal accesses the central server through the internet, the intelligent monitoring system for wearing the safety helmet realizes intelligent monitoring of wearing of the safety helmet and effectively guarantees safe production on a construction site.
However, the method still has the obvious defects in the using process: 1. the device cannot count the number of detected workers who do not wear the safety helmet, and cannot judge the change of the wearing rate of the safety helmet according to the number of illegal people every day, so that the function is single; 2. at the more use places of dust such as building site, on the glass dustcoat of camera and infrared inductor in the identification equipment to and on speaker device's the screen panel, all very easily the adhesion dust, thereby make the response accuracy of infrared inductor and the definition that the camera was shot reduce, the volume of speaker also reduces, consequently still need artifical periodic deashing dust removal when in-service use, and this will increase workman's the amount of labour, and is comparatively loaded down with trivial details, this problem can not be solved effectively to above-mentioned device.
Disclosure of Invention
The invention aims to provide intelligent identification equipment for a safety helmet, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an intelligent identification device for a safety helmet comprises a shell, wherein a first transparent glass plate, a mesh enclosure and a second transparent glass plate are embedded in the side wall of the shell, a partition plate is fixedly arranged in the inner cavity of the shell, an infrared inductor, a loudspeaker and a camera are arranged above the partition plate, and a processor assembly, a battery, a controller, a communication module and a time delay relay are arranged below the partition plate;
the battery is electrically connected with the infrared sensor, the infrared sensor is arranged corresponding to the position of the second transparent glass plate, the infrared sensor is in signal connection with the camera, the camera is arranged corresponding to the position of the first transparent glass plate, the camera is in signal connection with the processor assembly, the processor assembly comprises a human-shaped extraction module, a safety helmet distinguishing module, a screen capture module and a statistic module, the processor assembly is in signal connection with the controller, the controller is respectively in signal connection with the loudspeaker, the communication module and the delay relay, the loudspeaker is arranged corresponding to the position of the mesh enclosure, the communication module is in signal connection with the background server, the background server is respectively in signal connection with the storage module and the display terminal, and the delay relay is electrically connected with the conductive column;
the outer wall of the shell is provided with a hollow cleaning plate, the bottom of the hollow cleaning plate is symmetrically and fixedly provided with magnetic rods, the magnetic rods are movably arranged in concave rods, a connecting spring is connected between the concave rods and the hollow cleaning plate, the bottom of an inner cavity of each concave rod is provided with a conductive column, and the conductive columns are connected with a magnetic generating coil;
the fixed a plurality of ring bearings that are provided with on the cavity intracavity wall of cavity cleaning plate, the activity runs through in the ring bearing and is provided with the column spinner, the fixed center that sets up at drive gear of one end of column spinner, drive gear sets up and meshes in proper order between the cavity intracavity portion of cavity cleaning plate and a plurality of drive gear, the embedded cotton that is provided with of drive gear's one end is kept away from to the column spinner, is in the end drive gear meshes with the driving gear mutually, the driving gear is kept away from drive gear's one side and the rack meshes mutually, the rack is fixed to be set up on the outer wall of casing.
Preferably, the storage module is a reservoir.
Preferably, the display terminal includes at least one of a mobile phone, a notebook computer and a tablet.
Preferably, a support rod is fixedly arranged at the center of the driving gear, the support rod is movably arranged in a bearing seat, and the bearing seat is fixedly arranged on the inner wall of a hollow cavity of the hollow cleaning plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has centralized functions, when a worker who does not wear the safety helmet is detected, the screen capturing module in the processor assembly captures related pictures as evidence, and the counting module counts the number of workers who do not wear the safety helmet on the same day, so that the trend change is conveniently counted and analyzed in the later period;
2. the device is provided with a time delay relay, a conductive column and a magnetic coil, when the infrared sensor does not detect the existence of workers, the time delay relay does not send information for prolonging the power supply time any more until the conductive column is powered off, and the magnetic rod after the power off loses the adsorption force, so that the hollow cleaning plate moves upwards under the action of the restoring force of the connecting spring, thereby driving the scrubbing cotton to move, removing dust attached to the first transparent glass plate, the mesh enclosure and the second transparent glass plate, avoiding the problems of sundries blocking, reduction of the induction accuracy of the infrared sensor and reduction of the volume of the loudspeaker caused by the attachment of the dust to the camera, and being more suitable for being used in places with more dust, such as building sites;
3. the hollow cleaning plate in the equipment is driven to scrub the cotton and move, the driving gear can rotate in moving due to the arrangement of the rack, the driving gear drives the transmission gear to rotate, finally, the scrubbing cotton is indirectly rotated, the scrubbing effect is improved, impurities with strong adhesive force are prevented from being removed, and the cleaning effect is better.
The invention provides intelligent identification equipment for safety helmets, which has the advantages of centralized functions and simple structure, when the equipment is not used, the hollow cleaning plate can drive the scrubbing cotton to move, and the scrubbing cotton can also rotate, so that dust attached to the cameras, the infrared sensor and the loudspeaker housing can be thoroughly cleaned, the accuracy of identification is prevented from being influenced by the dust, manual cleaning is not needed, the equipment is simple and convenient to use, and the equipment is very worthy of popularization.
Drawings
FIG. 1 is a schematic cross-sectional view of the interior of a housing of the present invention;
FIG. 2 is a schematic cross-sectional view of the outer appearance of the housing and the concave rod of the present invention;
FIG. 3 is a schematic cross-sectional side view of a hollow cleaning plate of the present invention;
FIG. 4 is a schematic diagram of the connection relationship of the electrical components of the present invention;
FIG. 5 is a block diagram of a processor assembly according to the present invention.
In the figure: the device comprises a shell 1, a first transparent glass plate 2, a net cover 3, a second transparent glass plate 4, a partition plate 5, an infrared sensor 6, a loudspeaker 7, a camera 8, a processor assembly 9, a human-shaped extraction module 901, a helmet distinguishing module 902, a screen capture module 903, a statistic module 904, a battery 10, a controller 11, a communication module 12, a delay relay 13, a background server 14, a storage module 15, a display terminal 16, a hollow cleaning plate 17, a magnetic rod 18, a concave rod 19, a connecting spring 20, a conductive column 21, a magnetic coil 22, a circular ring bearing 23, a rotary column 24, a transmission gear 25, scrubbing cotton 26, a driving gear 27, a supporting rod 28, a bearing seat 29 and a rack 30.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
the utility model provides a safety helmet intelligent recognition equipment, includes casing 1, and embedded first clear glass board 2, screen panel 3 and the second clear glass board 4 that are provided with in the lateral wall of casing 1, the fixed baffle 5 that is provided with in the inner chamber of casing 1, the top of baffle 5 are provided with infrared inductor 6, speaker 7 and camera 8, and the below of baffle 5 is provided with treater assembly 9, battery 10, controller 11, communication module 12 and time delay relay 13.
The battery 10 is electrically connected to the infrared sensor 6, the infrared sensor 6 is configured to detect whether there is movement, when no person enters or exits a detection area, subsequent devices such as the camera 8 are not activated, thereby playing a role in reducing energy consumption, the infrared sensor 6 is disposed in a position corresponding to the second transparent glass plate 4, the second transparent glass plate 4 is disposed to prevent the infrared sensor 6 from directly contacting dust, the infrared sensor 6 may employ a wireless wide-angle infrared human body sensing detector of PD01 model manufactured by langpu L ANGPOO, the infrared sensor 6 is signally connected to the camera 8, the camera 8 is disposed in a position corresponding to the first transparent glass plate 2, the first transparent glass plate 2 is disposed to prevent the camera 8 from directly contacting dust, the camera 8 is signally connected to the processor assembly 9, the processor assembly 9 may employ TMS 2812PGFA model manufactured by zikaiko communications electronic limited company, the processor assembly 9 may employ TMS 2812PGFA model manufactured by zikayakenkun corporation, the processor assembly 9 includes a human-shaped extraction module 901, a safety cap identification module 903, a interception module and a termination module 904, the transceiver module may employ a transceiver 14, the ram 7-a relay 18, the transceiver module, the ram 13, the ram 7 transceiver module may employ a transceiver module 26, the ram 13 transceiver module, the ram 13, the ram 7 transceiver module, the ram 13 transceiver module, the ram 18 is disposed to detect a transceiver module, the ram 13, the ram 12, the ram 13 transceiver module, the ram 7 ram 12, the ram 12 is disposed to detect the ram 12, the ram 3 ram 12, the ram 12 is connected to detect the ram 12, the.
Be provided with hollow cleaning plate 17 on the outer wall of casing 1, the bottom symmetry of hollow cleaning plate 17 is fixed and is provided with magnetic pole 18, magnetic pole 18 activity sets up in interior concave type pole 19, it is provided with connecting spring 20 to connect between interior concave type pole 19 and the hollow cleaning plate 17, the inner chamber bottom of interior concave type pole 19 all is provided with leads electrical pillar 21, it is provided with magnetism generating coil 22 to connect on leading electrical pillar 21, when leading electrical pillar 21 circular telegram, magnetism generating coil 22 can be because the circular telegram produces magnetic field, thereby adsorb magnetic pole 18, when leading electrical pillar 21 outage, magnetism generating coil 22 no longer produces magnetic field, make hollow cleaning plate 17 by connecting spring 20 jack-up, thereby make magnetic pole 18 also upwards remove thereupon.
A plurality of circular ring bearings 23 are fixedly arranged on the inner wall of the hollow cavity of the hollow cleaning plate 17, a rotary column 24 is movably arranged in the circular ring bearings 23 in a penetrating manner, the rotary column 24 can rotate in the circular ring bearings 23, one end of the rotary column 24 is fixedly arranged at the center of a transmission gear 25, the transmission gear 25 is arranged in the hollow cavity of the hollow cleaning plate 17, the transmission gears 25 are sequentially meshed, a scrubbing cotton 26 is embedded at one end of the rotary column 24 far away from the transmission gear 25, the scrubbing cotton 26 is used for cleaning the first transparent glass plate 2, the mesh enclosure 3 and the second transparent glass plate 4, the transmission gear 25 at the tail end is meshed with a driving gear 27, one side of the driving gear 27 far away from the transmission gear 25 is meshed with a rack 30, and the rack 30 is fixedly arranged on the outer wall of the shell 1, when the hollow cleaning plate 17 moves, the pinion gear 27 rotates along the rack 30.
Preferably, the storage module 15 is a storage, and an appropriate size of the storage can be selected according to needs, which is a common prior art and will not be described herein again.
Preferably, the display terminal 16 includes at least one of a mobile phone, a notebook computer and a tablet, so that the relevant person can conveniently grasp information in time.
Preferably, a support rod 28 is fixedly arranged at the center of the driving gear 27, the support rod 28 is movably arranged in a bearing seat 29, the bearing seat 29 is fixedly arranged on the inner wall of the hollow cavity of the hollow cleaning plate 17, the support rod 28 can rotate in the bearing seat 29, and the support rod 28 plays a role of movable support.
The working principle is as follows: when the infrared sensor is used, the battery 10 supplies power to the infrared sensor 6, when the infrared sensor 6 detects that a moving human body appears, the camera 8 starts to work, the camera shooting information is transmitted to the processor assembly 9, the processor assembly 9 firstly extracts a person image from the background through the human shape extraction module 901, then the helmet distinguishing module 902 judges whether a worker wears a helmet or not, if not, the screen capturing module 903 captures the camera shooting image as a basis for post-processing, the screen capturing can be attached with relevant information such as time, place and IP of the camera 8, the counting module 904 counts the number of workers who do not wear the helmet on the same day, so that the trend change is conveniently counted and analyzed in the later period, firstly, the loudspeaker 7 is started to remind the worker to wear the helmet, secondly, the communication module 12 transmits the relevant information to the background server 14, the background server 14 stores the information in the storage module 15 on one hand, and displays the relevant information on the display terminal 16 on the other hand, so that the supervisor can know the information in time, and third, the time delay relay 13 controls the conductive column 21 to be continuously electrified for a certain time until the infrared sensor 6 does not detect a moving object, the time delay relay 13 does not send the information for prolonging the power supply time, the conductive column 21 is powered off, so that the magnetic generating coil 22 does not generate a magnetic field any more, the hollow cleaning plate 17 is jacked up by the connecting spring 20, thereby driving the scrubbing cotton 26 to perform dust removal cleaning on the surfaces of the first transparent glass plate 2, the mesh enclosure 3 and the second transparent glass plate 4, in addition, in the moving process of the hollow cleaning plate 17, the driving gear 27 is meshed with the rack 30 to rotate, the driving gear 27 drives the transmission gear 25 to rotate, the transmission gears 25 are meshed in, drive gear 25 drives and cleans cotton 26 and rotates to improve clean effect, avoid adhering to sedimentary impurity and be difficult to by thoroughly clearing up, effectively avoided the dust to lead to infrared inductor 6's response accuracy to descend after adhering to, the definition that camera 8 was shot descends and the loudspeaker 7 send the volume reduction, need not artifical dust removal, it is more convenient to use, makes this equipment be applicable to more places of dust such as building site.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The utility model provides a safety helmet intelligent recognition equipment, includes casing (1), its characterized in that: a first transparent glass plate (2), a mesh enclosure (3) and a second transparent glass plate (4) are embedded in the side wall of the shell (1), a partition plate (5) is fixedly arranged in the inner cavity of the shell (1), an infrared inductor (6), a loudspeaker (7) and a camera (8) are arranged above the partition plate (5), and a processor assembly (9), a battery (10), a controller (11), a communication module (12) and a time delay relay (13) are arranged below the partition plate (5);
the battery (10) is electrically connected with the infrared sensor (6), the infrared sensor (6) is arranged corresponding to the position of the second transparent glass plate (4), the infrared sensor (6) is connected with the camera (8) through signals, the camera (8) is arranged corresponding to the position of the first transparent glass plate (2), the camera (8) is connected with the processor assembly (9) through signals, the processor assembly (9) comprises a human-shaped extraction module (901), a safety helmet identification module (902), a screen capture module (903) and a statistic module (904), the processor assembly (9) is connected with the controller (11) through signals, the controller (11) is respectively connected with the loudspeaker (7), the communication module (12) and the time delay relay (13) through signals, the loudspeaker (7) is arranged corresponding to the position of the mesh enclosure (3), and the communication module (12) is connected with the background through signals to the server (14), the background server (14) is respectively in signal connection with the storage module (15) and the display terminal (16), and the delay relay (13) is electrically connected with the conductive column (21);
the outer wall of the shell (1) is provided with a hollow cleaning plate (17), magnetic rods (18) are symmetrically and fixedly arranged at the bottom of the hollow cleaning plate (17), the magnetic rods (18) are movably arranged in an inwards concave rod (19), a connecting spring (20) is connected between the inwards concave rod (19) and the hollow cleaning plate (17), the bottoms of inner cavities of the inwards concave rods (19) are provided with conductive columns (21), and the conductive columns (21) are connected with a magnetic generation coil (22);
the utility model discloses a hollow cleaning plate, including cavity cleaning plate, be provided with on the cavity intracavity wall of cavity cleaning plate (17) fixed a plurality of ring bearing (23) of being provided with, activity runs through in ring bearing (23) and is provided with column spinner (24), the fixed center that sets up at drive gear (25) of one end of column spinner (24), drive gear (25) set up and mesh in proper order between the cavity intracavity portion of cavity cleaning plate (17) and a plurality of drive gear (25), the embedded cotton (26) of cleaning that is provided with of one end that drive gear (25) were kept away from in column spinner (24), be in the end drive gear (25) and driving gear (27) mesh mutually, one side and rack (30) mesh of drive gear (25) are kept away from in driving gear (27), rack (30) are fixed to be set up on the outer wall of casing (1).
2. The intelligent identification device for the safety helmet as claimed in claim 1, wherein: the storage module (15) is a storage.
3. The intelligent identification device for the safety helmet as claimed in claim 1, wherein: the display terminal (16) comprises at least one of a mobile phone, a notebook computer and a tablet.
4. The intelligent identification device for the safety helmet as claimed in claim 1, wherein: the center of the driving gear (27) is fixedly provided with a supporting rod (28), the supporting rod (28) is movably arranged in a bearing seat (29), and the bearing seat (29) is fixedly arranged on the inner wall of a hollow cavity of the hollow cleaning plate (17).
CN202010320144.0A 2020-04-22 2020-04-22 Intelligent identification equipment for safety helmet Pending CN111407034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010320144.0A CN111407034A (en) 2020-04-22 2020-04-22 Intelligent identification equipment for safety helmet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010320144.0A CN111407034A (en) 2020-04-22 2020-04-22 Intelligent identification equipment for safety helmet

Publications (1)

Publication Number Publication Date
CN111407034A true CN111407034A (en) 2020-07-14

Family

ID=71486512

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010320144.0A Pending CN111407034A (en) 2020-04-22 2020-04-22 Intelligent identification equipment for safety helmet

Country Status (1)

Country Link
CN (1) CN111407034A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116046772A (en) * 2022-10-31 2023-05-02 四川轻化工大学 Intelligent safety detection device and detection method based on road bridge construction site

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116046772A (en) * 2022-10-31 2023-05-02 四川轻化工大学 Intelligent safety detection device and detection method based on road bridge construction site
CN116046772B (en) * 2022-10-31 2023-08-08 四川轻化工大学 Intelligent safety detection device and detection method based on road bridge construction site

Similar Documents

Publication Publication Date Title
CN104703133B (en) A kind of method that anti-lost contact system of intelligence realizes the anti-lost contact of intelligence
CN204856114U (en) Intelligence rack management system
CN106066622B (en) A kind of intelligent monitoring device and corresponding system
CN111407034A (en) Intelligent identification equipment for safety helmet
CN203025885U (en) Anti-theft alarming and calling system of valuable article
CN211984042U (en) Intelligent identification equipment for safety helmet
CN214042530U (en) Wisdom residential quarter property management monitoring alarm device
CN107214712A (en) Outstanding rail robot device and system
CN208954135U (en) A kind of system realized to workshop number of people entering statistical management
CN207541767U (en) A kind of smart home security warning device
CN218630978U (en) Fire alarm device for construction
CN204537394U (en) Falls Among Old People pick-up unit
CN210433471U (en) Wearable old people health sign monitoring device
CN213659680U (en) Intelligent traffic light capable of automatically adjusting traffic flow
CN210201941U (en) Internet of things remote fire safety intelligent monitoring equipment
CN213276899U (en) Fire alarm device capable of acquiring video data
CN204594954U (en) A kind of public environment air quality monitoring alarm
CN103931582A (en) Drosophila monitoring system
CN109873308A (en) A kind of substation operation monitoring to maintain equipment
CN106686342A (en) System and method of electric vehicle video monitoring
CN216391171U (en) Internet of things-based monitoring device for laboratory
CN209181948U (en) A kind of aardvark free-ranging panorama intelligent monitor system
CN212436909U (en) Raising column
CN217333386U (en) Take face identification attendance machine of body temperature detection
CN217113461U (en) Novel perimeter alarm installation protective housing

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination