CN113903115A - Smart city security system - Google Patents

Smart city security system Download PDF

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Publication number
CN113903115A
CN113903115A CN202111167316.6A CN202111167316A CN113903115A CN 113903115 A CN113903115 A CN 113903115A CN 202111167316 A CN202111167316 A CN 202111167316A CN 113903115 A CN113903115 A CN 113903115A
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CN
China
Prior art keywords
camera
seat
annular rail
annular
person
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Granted
Application number
CN202111167316.6A
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Chinese (zh)
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CN113903115B (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.)
Shenzhen Zhong'an Construction Engineering Co.,Ltd.
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Harbin Yimu Technology Co ltd
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Priority to CN202111167316.6A priority Critical patent/CN113903115B/en
Publication of CN113903115A publication Critical patent/CN113903115A/en
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Publication of CN113903115B publication Critical patent/CN113903115B/en
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    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00Individual registration on entry or exit
    • G07C9/30Individual registration on entry or exit not involving the use of a pass
    • G07C9/32Individual registration on entry or exit not involving the use of a pass in combination with an identity check
    • G07C9/37Individual registration on entry or exit not involving the use of a pass in combination with an identity check using biometric data, e.g. fingerprints, iris scans or voice recognition
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02Heads
    • F16M11/04Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/10Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02Heads
    • F16M11/18Heads with mechanism for moving the apparatus relatively to the stand
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/42Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels
    • F16M11/425Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels along guiding means

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Studio Devices (AREA)

Abstract

The invention relates to the field of urban security, in particular to an intelligent urban security system. A smart city security system comprises a security device and a face information storage server, wherein the security device is provided with a button, a circular plate, a camera I, a camera II and a partition plate, the button is triggered when a person enters the circular plate, the camera I and the camera II transmit information to the face information storage server, the face information storage server detects the face of the person, whether the person passes the face information storage server after the face information storage server detects the face of the person, and whether the person carries large-size articles is detected through the camera I and the camera II after the face information storage server detects the face information and determines that the person passes the face information storage server; when the detection result shows that the small-sized article is not carried, the two partition plates move away from each other to open a small through hole; the detection result is that the large-size article is carried, and at the moment, the two partition plates are laid down to open a large through hole. The invention can determine whether a person can enter a specific area according to face recognition.

Description

Smart city security system
Technical Field
The invention relates to the field of urban security, in particular to an intelligent urban security system.
Background
The smart city realizes comprehensive and thorough perception, broadband ubiquitous interconnection and intelligent integration and sustainable innovation characterized by user innovation, open innovation, public innovation and collaborative innovation through the application of new-generation information technologies such as Internet of things infrastructure, cloud computing infrastructure, geographic space infrastructure and the like and tools and methods such as wiki, social network, integrated integration method, network-driven full-media integration communication terminal and the like. Along with the rise of network empire states, the fusion development of mobile technologies and the innovative democratization process, the smart city in the knowledge social environment is a high-grade form of the development of the informatization city after the digital city. However, the conventional smart city does not have a security system for determining whether a person can enter a specific area according to face recognition.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the smart city security system which has the beneficial effect that whether a person can enter a specific area can be determined according to face recognition.
A smart city security system comprises a security device and a face information storage server, wherein the security device is provided with a button, a circular plate, a camera I, a camera II and a partition plate, the button is triggered when a person enters the circular plate, the camera I and the camera II transmit information to the face information storage server, the face information storage server detects the face of the person, whether the person passes the face information storage server after the face information storage server detects the face of the person, and whether the person carries large-size articles is detected through the camera I and the camera II after the face information storage server detects the face information and determines that the person passes the face information storage server; when the detection result shows that the small-sized article is not carried, the two partition plates move away from each other to open a small through hole; the detection result is that the large-size article is carried, and at the moment, the two partition plates are laid down to open a large through hole.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a flow chart of a smart city 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 first schematic structural view of the annular seat;
FIG. 5 is a second schematic structural view of the annular seat;
FIG. 6 is a schematic structural view of an annular rail I;
FIG. 7 is a schematic structural diagram of a camera I;
FIG. 8 is a first schematic structural view of the circular rail II;
FIG. 9 is a second schematic structural view of the circular rail II;
FIG. 10 is a first schematic structural view of the movable base;
FIG. 11 is a second schematic structural view of the movable base;
FIG. 12 is a first schematic structural view of a base;
fig. 13 is a second structural diagram of the base.
In the figure: an annular seat 101; a support base 102; a telescopic rod 103; a vertical rod 104; a tab 105; a convex strip 106; a button 107;
a circular plate 201; the anti-slip ribs 202; a catch pin 203; a cylinder 204;
an annular rail I301; a connection block 302; a camera mount 303; a camera I304; a lower seat 305; a wheel I306;
an annular rail II 401; a side shaft 402; a sliding sleeve 403; an extension 404; a movable base 405; a camera II 406; a motor base 407; an elastic stay 408; a rotating wheel II 409; a spacer bar 410; a slide hole 411; a protruding shaft 412;
a base 501; a side shaft 502; a chute 503; a rotating bar 504; a partition 505; a support 506; a filler sheet 507; a pad 508; a limiting groove 509; a friction wheel 510.
Detailed Description
A smart city security system comprises a security device and a face information storage server, wherein the security device comprises a button 107, a circular plate 201, a camera I304, a camera II406 and a partition plate 505, the button 107 is triggered when a person enters the circular plate 201, the camera I304 and the camera II406 transmit information to the face information storage server, the face information storage server detects the face of the person, whether the person passes the face information storage server is determined after the face information storage server detects the face of the person, and whether the person carries bulky articles is detected through the camera I304 and the camera II406 after the face information storage server detects the face of the person and determines whether the person passes the face information storage server; the detection result shows that the device does not carry large-volume articles, and the two partition plates 505 move away from each other to open a small through hole; when the detection result is that the large-volume article is carried, the two partition plates 505 are laid down to open a large through hole.
In some embodiments, referring to fig. 1-13, the problem addressed in the figures is determining, based on the face data entered, whether a person is the person who entered the data, and,
the security device includes annular seat 101, supporting seat 102, annular rail I301 and connecting block 302, and the both sides of annular seat 101 have all linked firmly supporting seat 102, and annular rail I301 is connected through two connecting block 302 around in the outside of annular seat 101, and the left and right sides of annular rail I301 has all linked firmly camera I304, and camera I304 can remove along annular rail I301. Two supporting seats 102 have played the effect of supporting annular seat 101, two connecting blocks 302 have played the effect of supporting annular rail I301, annular rail I301 can supply two cameras I304 to slide along it, the people can stand in the upside of annular seat 101 in the vertical meeting of entering into specific area, at this moment two cameras I304 can slide along annular rail I301 and scan people's face and stature, and then judge whether the people is the people that can make its entering behind the input data according to the facial data of input, gather in the time through two cameras I304 and can avoid taking place to gather the dead angle.
In some embodiments, referring to fig. 1-13, the problem addressed is moving camera I304 along circular track I301, and,
the security device further comprises a camera seat 303, a lower seat 305 and rotating wheels I306, two rotating wheels I306 are rotatably connected between the camera seat I303 and the lower seat 305, the camera seat I303 and the lower seat 305 are respectively located on the upper side and the lower side of the annular rail I301, the two rotating wheels I306 are respectively in contact with the inner side and the outer side of the annular rail I301, one rotating wheel I306 rotates through the driving of a steering engine, and the camera I304 is fixedly connected to the upper side of the camera seat 303.
The camera base 303 and the lower base 305 are respectively clamped on the upper side and the lower side of the annular rail I301, so that the two rotating wheels I306 are prevented from being separated from the annular rail I301, the camera base 303 can be driven to move along the annular rail I301 when one rotating wheel I306 is driven to rotate by the steering engine, the camera I304 is driven to move along the annular rail I301, and the position of the camera I304 is changed.
In some embodiments, referring to fig. 1-13, the problem addressed is to change the pitch angle of the camera I304 shots, and,
the camera I304 is hinged to the upper side of the camera seat 303, and the camera I304 is driven to rotate through a steering engine.
The steering wheel can drive camera I304 and carry out the pitch rotation, and then changes the pitch angle that camera I304 shot.
In some embodiments, referring to fig. 1-13, the problem addressed in the figures is that camera II406 can be directed to collecting a person's face, collecting the person's face information more clearly, and,
security protection device still includes pole setting 104, annular rail II401, side shaft 402 and sliding sleeve 403, both ends have all been linked firmly pole setting 104 about the annular seat 101 upside, the left and right sides of annular rail II401 has all been linked firmly side shaft 402, two side shafts 402 rotate respectively and connect on two sliding sleeves 403, two sliding sleeve 403 vertical sliding connection respectively is on two pole setting 104, camera II406 sets up on annular rail II401, camera II406 can remove along annular rail II401, side shaft 402 rotates on sliding sleeve 403 through steering wheel drive.
Two sliding sleeves 403 all can be along the vertical slip of the pole setting 104 that corresponds, and then drive annular rail II401 and go up and down, side shaft 402 can rotate on sliding sleeve 403 through steering engine drive, and then change annular rail II 401's every single move angle, camera II406 sets up on annular rail II401, camera II406 can move along annular rail II401, and then change camera II406 and annular rail II 401's relative position, the people can stand the upside at plectane 201 when getting into specific area, at this moment camera II406 can be located people's head position, at this moment can gather people's face pertinently through camera II406 that can remove along annular rail II401, gather people's facial information more clearly.
In some embodiments, referring to fig. 1-13, the problem addressed in the figures is that the location of zoom-out camera II406 collects facial information of a person over a wide range, and,
the security device further comprises an extension part 404, the annular rail II401 is fixedly connected with the extension part 404, and the camera II406 can move along the extension part 404.
The extension part 404 can lengthen and lengthen the annular track II401, so that the camera II406 at the head position of the person can move to a position farther away from the face of the person, and further the position of the camera II406 is pulled away to collect facial information of the person in a large range.
In some embodiments, referring to fig. 1-13, the problem addressed in the figures is the acquisition of faces of people of different heights and sizes by camera II406, and,
the security device further comprises telescopic rods 103, wherein one vertical rod 104 is fixedly connected with the telescopic rod 103, and the movable end of the telescopic rod 103 is fixedly connected with one sliding sleeve 403.
The telescopic link 103 can drive the sliding sleeve 403 to slide up and down when stretching out and drawing back, and then drive the annular rail II401 to slide up and down, drive the annular rail II401 to rise higher and then with the camera II406 rise higher, and then can gather the face of the people of different heights and different statures through the camera II 406.
In some embodiments, referring to fig. 1-13, the problem addressed in the figures is that the mobile seat 405 can be moved from the circular track II401 to the extension 404 by the feature of being movable between the wheel II409 and the mobile seat 405, and,
the security protection device still includes and removes seat 405, motor cabinet 407, elasticity stay 408, runner II409, space bar 410, slide opening 411 and protruding axle 412, camera II406 links firmly on removing seat 405, it is located the inboard of annular rail II401 to remove seat 405, the upper and lower both ends of removing seat 405 have all linked firmly space bar 410, all linked firmly slide opening 411 on every space bar 410, the upper and lower both ends of runner II409 have all linked firmly protruding axle 412, two protruding axles 412 are inserted respectively on two slide openings 411, the output shaft of motor links firmly on the protruding axle 412 that is located the downside, the motor links firmly on motor cabinet 407, elasticity stay 408 is connected in the outside of motor cabinet 407, the outer end of elasticity stay 408 links firmly the tip at the space bar 410 that is located the downside.
The elastic supporting bar 408 always gives the inward elastic force to the motor base 407, and then always gives the inward elastic force to the rotating wheel II409 and the two protruding shafts 412, so that the rotating wheel II409 can be pressed on the outer side of the annular rail II401 or the extending part 404, the motor can drive the rotating wheel II409 to rotate, and then the movable base 405 is driven to slide along the annular rail II401 or the extending part 404, because the connecting part of the annular rail II401 and the extending part 404 has discontinuous positions, and then the movable base 405 can be moved to the extending part 404 from the annular rail II401 through the characteristics that the rotating wheel II409 can be moved between the movable base 405.
In some embodiments, referring to fig. 1-13, the problem addressed in the figures is that the angle of camera II406 can be changed for adaptive photography in various situations, and,
the camera II406 is hinged on the movable seat 405 and is driven to rotate by the steering engine.
Because camera II406 passes through steering wheel drive and rotates, and then can change camera II 406's every single move angle, and then can change camera II 406's angle and carry out the adaptability under the various condition and shoot.
In some embodiments, referring to fig. 1-13, the problem addressed is that the circular plate 201 presses on the button 107 to activate the button, when the smart city security system recognizes that someone is entering, and,
the security protection device still includes anti-skidding arris 202, backing pin 203, cylinder 204, lug 105 and sand grip 106, both ends have all been linked firmly lug 105 about annular seat 101 downside, the downside of annular seat 101 has linked firmly sand grip 106, the upside of sand grip 106 has linked firmly button 107, the upside of plectane 201 has linked firmly a plurality of anti-skidding arris 202, both ends have all linked firmly cylinder 204 about plectane 201 downside, two cylinder 204 vertical sliding connection respectively is on two lugs 105, compression spring has all been cup jointed on two anti-skidding arris 202, two compression spring are located two lug 105's upside respectively, two compression spring all are located the downside of plectane 201, the lower extreme of two anti-skidding arris 202 has all linked firmly backing pin 203, two backing pins 203 are located two lug 105's downside respectively.
People can stand on the upper side of the circular plate 201 when entering a specific area, the anti-slip ribs 202 play an anti-slip role when the people stand on the upper side of the circular plate 201, the people stand on the circular plate 201 and overcome the elastic force of the two compression springs through gravity to drive the circular plate 201 and the two cylinders 204 to slide downwards, further the circular plate 201 is pressed on the button 107 to trigger the button, the smart city security system recognizes that people enter the smart city, at the moment, information can be transmitted to the face information storage server through the camera I304 and the camera II406, the face information storage server detects the face of the people, and whether the people are released or not is determined after detection.
The security device further comprises a base 501, a side shaft 502, a sliding groove 503, a rotating strip 504, a limiting groove 509 and a friction wheel 510, the base 501 is fixedly connected between the two supporting seats 102, the rotating strip 504 is hinged to the upper portion of the base 501, the rotating strip 504 rotates through the driving of a steering engine, the sliding groove 503 is formed in the upper side of the rotating strip 504, two partition plates 505 are connected onto the sliding groove 503 in a sliding mode, the limiting groove 509 is formed in the rear sides of the two partition plates 505, the friction wheel 510 is inserted into the two limiting grooves 509 in a splicing mode, the two friction wheels 510 are in friction transmission with the two partition plates 505 respectively, the two friction wheels 510 are driven to rotate through the steering engine, and the steering engine used for driving the two friction wheels 510 is fixedly connected to the rear side of the rotating strip 504.
After the detection is finished and the release is determined, whether the person carries large-size articles is detected through the camera I304 and the camera II 406; the detection result shows that the device does not carry large-volume articles, and the two partition plates 505 move away from each other to open a small through hole; when the detection result is that the large-volume article is carried, the two partition plates 505 are laid down to open a large through hole. The steering engine drives the two friction wheels 510 to rotate, so that the two partition plates 505 can be driven to slide along the sliding grooves 503, and a small through opening can be opened when the two partition plates 505 slide away from each other; can drive when changeing strip 504 and rotate backward through steering wheel drive commentaries on classics strip 504 and two baffles 505, and then rotate backward two baffles 505 and fall, the testing result is for having carried bulky article, and at this moment two baffles 505 fall and open a large-scale access opening.
The security device still includes support piece 506, infill panel 507 and pad 508, and both ends all are connected with infill panel 507 through support piece 506 about the base 501 front side, and two infill panels 507 all are located annular seat 101 and change between the strip 504, and the rear side fixedly connected with pad 508 of base 501 changes the strip 504 and rotates backward to contact with pad 508 behind the horizontal state.
The two filling plates 507 have the effect of filling the gap between the annular seat 101 and the rotating strip 504, when the rotating strip 504 and the two partition plates 505 rotate backwards and fall down, the rotating strip 504 is pressed on the cushion piece 508, the rotating strip 504 is supported by the cushion piece 508, and then a person can step on the two partition plates 505 of the rotating strip 504 to pass through.

Claims (10)

1. The utility model provides a wisdom city security protection system, includes security protection device and people's face information storage server, its characterized in that: the security device comprises a button (107), a circular plate (201), a camera I (304), a camera II (406) and a partition plate (505), the button (107) is triggered when a person enters the circular plate (201), at the moment, the camera I (304) and the camera II (406) transmit information to a face information storage server, the face information storage server detects the face of the person, whether the person is released after detection is determined, and whether the person carries large-size articles is detected through the camera I (304) and the camera II (406) after the detection is finished and the release is determined; the detection result shows that the small-sized article is not carried, and at the moment, the two partition plates (505) move away from each other to open a small through hole; when the detection result is that the large-volume article is carried, the two partition plates (505) are laid down to open a large through hole.
2. The smart city security system according to claim 1, wherein: the security device comprises an annular seat (101), a supporting seat (102), an annular rail I (301) and connecting blocks (302), wherein the supporting seat (102) is arranged on each of two sides of the annular seat (101), the annular rail I (301) is connected to the outer side of the annular seat (101) through the front connecting block and the rear connecting block (302), cameras I (304) are arranged on the left side and the right side of the annular rail I (301), and the cameras I (304) can move along the annular rail I (301).
3. The smart city security system according to claim 2, wherein: the security device is still including taking a picture seat (303), lower seat (305) and runner I (306), it is connected with two runner I (306) to rotate between seat I (303) and lower seat (305) to take a picture, it is located the upper and lower both sides of annular rail I (301) respectively to take a picture seat I (303) and lower seat (305), two runner I (306) contact with the inside and outside both sides of annular rail I (301) respectively, one of them runner I (306) rotate through steering wheel drive, camera I (304) set up the upside at seat (303) of taking a picture.
4. The smart city security system according to claim 3, wherein: the camera I (304) is hinged to the upper side of the camera seat (303), and the camera I (304) is driven to rotate through a steering engine.
5. The smart city security system according to claim 2, wherein: the security device further comprises an upright rod (104), an annular rail II (401), side shafts (402) and sliding sleeves (403), the left end and the right end of the upper side of the annular seat (101) are fixedly connected with the upright rod (104), the left side and the right side of the annular rail II (401) are fixedly connected with the side shafts (402), the two side shafts (402) are respectively rotatably connected onto the two sliding sleeves (403), the two sliding sleeves (403) are respectively and vertically connected onto the two upright rods (104) in a sliding mode, a camera II (406) is arranged on the annular rail II (401), the camera II (406) can move along the annular rail II (401), and the side shafts (402) are driven by a steering engine to rotate on the sliding sleeves (403).
6. The smart city security system according to claim 5, wherein: the security device further comprises an extension portion (404), the annular rail II (401) is provided with the extension portion (404), and the camera II (406) can move along the extension portion (404).
7. The smart city security system according to claim 6, wherein: the security device further comprises an expansion link (103), wherein the expansion link (103) is fixedly connected to one upright rod (104), and the movable end of the expansion link (103) is fixedly connected to one sliding sleeve (403).
8. The smart city security system according to claim 7, wherein: the security device also comprises a moving seat (405), a motor seat (407), an elastic stay (408), a rotating wheel II (409), a spacing bar (410), a sliding hole (411) and a protruding shaft (412), camera II (406) sets up on removing seat (405), it is located the inboard of annular rail II (401) to remove seat (405), the upper and lower both ends of removing seat (405) all are provided with space bar (410), all be provided with slide opening (411) on every space bar (410), the equal fixedly connected with protruding axle (412) in upper and lower both ends of runner II (409), insert respectively on two slide opening (411) two protruding axle (412), the output shaft fixed connection of motor is on protruding axle (412) that are located the downside, motor fixed connection is on motor cabinet (407), the outside of motor cabinet (407) is connected with elasticity stay (408), the outer end fixed connection of elasticity stay (408) is at the tip of space bar (410) that are located the downside.
9. The smart city security system according to claim 8, wherein: the camera II (406) is hinged to the movable seat (405) and is driven to rotate by the steering engine.
10. The smart city security system according to claim 9, wherein: the security device also comprises an anti-slip edge (202) and a stop pin (203), cylinder (204), lug (105) and sand grip (106), equal fixedly connected with lug (105) in both ends about annular seat (101) downside, the downside fixedly connected with sand grip (106) of annular seat (101), the upside of sand grip (106) is provided with button (107), the upside of plectane (201) is provided with a plurality of anti-skidding arriss (202), equal fixedly connected with cylinder (204) in both ends about plectane (201) downside, two cylinder (204) vertical sliding connection respectively are on two lug (105), all cup jointed compression spring on two anti-skidding arriss (202), two compression springs are located the upside of two lug (105) respectively, two compression springs all are located the downside of plectane (201), the equal fixedly connected with backing pin (203) of lower extreme of two anti-skidding arriss (202), two backing pin (203) are located the downside of two lug (105) respectively.
CN202111167316.6A 2021-10-04 2021-10-04 Smart city security system Active CN113903115B (en)

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