CN107781610B - Portable invigilator's device - Google Patents
Portable invigilator's device Download PDFInfo
- Publication number
- CN107781610B CN107781610B CN201711338342.4A CN201711338342A CN107781610B CN 107781610 B CN107781610 B CN 107781610B CN 201711338342 A CN201711338342 A CN 201711338342A CN 107781610 B CN107781610 B CN 107781610B
- Authority
- CN
- China
- Prior art keywords
- base
- movable frame
- elastic
- clamping seat
- elastic clamping
- 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.)
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- 239000004677 Nylon Substances 0.000 claims abstract description 5
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 229920001778 nylon Polymers 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 2
- 238000012795 verification Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 6
- 230000006399 behavior Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/04—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or holding steady relative to, a person, e.g. by chains, e.g. rifle butt or pistol grip supports, supports attached to the chest or head
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Studio Devices (AREA)
Abstract
The invention relates to the technical field of examination monitoring, in particular to a portable invigilation device which comprises a law enforcement recorder, an anti-shake seat and a control device thereof, wherein the anti-shake seat is formed by sequentially assembling a base, a movable frame, an elastic clamping seat and a cover plate, a rectangular chute is formed in the base, one side of the base is provided with a shoulder rest, and a shoulder rest clip, a magnetic buckle or a nylon thread gluing is assembled on the shoulder rest; the control device is used for regulating and controlling the distance between the four groove walls of the rectangular chute and each side edge of the movable frame to maintain dynamic stability; the elastic clamping seat is connected with the movable frame through an elastic component; the bottom end of the law enforcement recorder passes through the abdication hole on the cover plate and is arranged on the elastic clamping seat; the invention has simple structure and convenient wearing, ensures the definition and stability of videos shot by invigilator in the invigilation process, realizes spot check and verification of the invigilator video information at any time, also plays a frightening role for examinees, greatly standardizes the examination discipline and prevents the occurrence of examination cheating events.
Description
Technical Field
The invention relates to the technical field of examination monitoring, in particular to a portable invigilation device.
Background
Currently, in order to ensure fairness and fairness of examination, cameras and devices matched with the cameras are generally arranged in an examination room, and assist examination staff to dynamically monitor behaviors of the examination staff in real time so as to prevent examination cheating events. However, due to uneven economic conditions in various areas, no monitoring device is arranged in some examination areas, and meanwhile, a single camera is used for monitoring the examination areas, so that possible conditions are provided for the fraud behaviors of some examination staff with incorrect attitudes, the monitoring difficulty of the monitoring staff is greatly increased, and the portable monitoring device is provided, and is particularly necessary for standardizing the examination discipline of the examination areas.
Disclosure of Invention
The invention aims to solve the problems that some examination rooms are not provided with an invigilation device at present, and the examination rooms provided with the invigilation device have monitoring dead angles, so that possible conditions are provided for cheating behaviors of examinees, and the invigilation difficulty of invigilation staff is increased, and provides a portable invigilation device for the problems.
The specific scheme of the invention is as follows: a portable invigilator's device, characterized by: the anti-shake base is formed by sequentially assembling a base, a movable frame, an elastic clamping seat and a cover plate, a rectangular chute matched with the movable frame is formed in the base, one side of the base is provided with a shoulder rest, and a shoulder passing clamp or a magnetic buckle or a nylon thread gluing is assembled on the shoulder rest; the four groove walls of the rectangular sliding groove are provided with grooves A for installing electromagnets, the four outer side edges of the movable frame are provided with grooves B for installing magnetic conduction blocks, and the four electromagnets and the four magnetic conduction blocks are arranged in a one-to-one opposite manner; the elastic clamping seat is connected with the movable frame through an elastic component; the bottom end of the law enforcement recorder passes through the abdication hole on the cover plate and is arranged on the elastic clamping seat; the control device comprises a power supply device, a PLC (programmable logic controller), a distance sensor for detecting the distance between each side edge of the movable frame and the corresponding groove wall of the rectangular sliding groove, and a Hall element for detecting the current energizing current of each electromagnet, when the law enforcement recorder horizontally shifts, the PLC immediately adjusts the current transmitted to each electromagnet through the pulse width modulation unit according to the detection information fed back by the distance sensor and the Hall element in real time, so as to control the dynamic stability of the law enforcement recorder relative to the anti-shake seat in the horizontal direction.
The bottom of the rectangular chute is provided with ball grooves corresponding to four corners of the movable frame, and each ball groove is correspondingly provided with a ball.
The elastic clamping seat is provided with a base, clamping plates are correspondingly arranged on the left side and the right side of the base, elastic rollers are arranged at the end parts of each clamping plate, an elastic cushion block is arranged on the upper end surface of the base, the bottom of the base is provided with an arc surface structure, and the arc surface structure of the bottom of the base sinks into the moving frame when being assembled.
The elastic member comprises four support columns a arranged on the side of the movable frame and four support columns b arranged on the side of the elastic clamping seat, wherein the support columns a and the support columns b are horizontally arranged, and each support column a and each support column b are connected through a viscoelastic member.
The invention has simple structure and convenient wearing, and the anti-shake control is carried out on the law enforcement recorder along the transverse direction and the longitudinal direction through the anti-shake seat, thereby ensuring the definition and the stability of the video shot by the invigilator in the invigilating process, realizing the spot check and the verification of the invigilation video information at any time, also playing a frightening role on the examinee, greatly standardizing the examination discipline and preventing the examination cheating event.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic diagram of an exploded construction of the present invention;
FIG. 3 is a schematic top view of the anti-shake seat according to the present invention;
FIG. 4 is a schematic top view of the base of the present invention;
FIG. 5 is a block diagram of a control structure of an anti-shake seat for performing anti-shake control on a lens of a law enforcement recorder in a horizontal direction in the present invention;
FIG. 6 is a schematic view of the mounting structure of the moving frame and the elastic holder according to the present invention;
fig. 7 is a schematic structural diagram of the anti-shake control of the anti-shake seat on the lens of the law enforcement recorder in the vertical direction.
In the figure: 1-law enforcement recorder, 2-base, 3-movable frame, 4-elastic clamping seat, 5-cover plate, 6-rectangular chute, 7-shoulder, 8-shoulder clamp, 9-magnetic buckle, 10-nylon thread gluing, 11-electromagnet, 12-groove A, 13-magnetic conduction block, 14-groove B, 15-abdication hole, 16-ball groove, 17-ball, 18-base, 19-clamping plate, 20-elastic roller, 21-elastic cushion block, 22-cambered surface structure, 23-support column a, 24-support column B, 25-viscoelastic member, 26-index a, 27-index B.
Detailed Description
Referring to fig. 1-6, a portable invigilator, which comprises a law enforcement recorder 1, an anti-shake seat and a control device thereof, wherein the anti-shake seat is formed by sequentially assembling a base 2, a movable frame 3, an elastic clamping seat 4 and a cover plate 5, a rectangular chute 6 matched with the movable frame 3 is arranged on the base 2, a shoulder rest 7 is arranged on one side of the base 2, and a shoulder passing clamp 8 or a magnetic buckle 9 or a nylon thread gluing 10 for wearing by an invigilator is assembled on the shoulder rest 7; the four groove walls of the rectangular sliding groove 6 are provided with grooves A12 for installing the electromagnets 11, wherein the electromagnets 11 are sequentially marked as an electromagnet a, an electromagnet B, an electromagnet c and an electromagnet d; the elastic clamping seat 4 is connected with the movable frame 3 through an elastic member; the bottom end of the law enforcement recorder 1 passes through the relief hole 15 on the cover plate 5 and is arranged on the elastic clamping seat 4; the control device comprises a power supply device, a PLC (programmable logic controller), distance sensors for detecting the distance between each side edge of the movable frame 3 and the corresponding groove wall of the rectangular chute 6 and Hall elements for detecting the current energizing current of each electromagnet, wherein the power supply device consists of rechargeable batteries and voltage stabilizing isolation modules, the distance sensors are arranged in two and arranged on the two perpendicular groove walls adjacent to the rectangular chute 6 and are sequentially marked as a distance sensor A1 and a distance sensor A2, and the Hall elements are provided with two groups and are sequentially marked as a Hall element A1, a Hall element A2, a Hall element b1 and a Hall element b2.
The principle of anti-shake control of the anti-shake seat on the horizontal direction of the lens of the law enforcement recorder 1 is as follows:
since the control targets we desire are: no matter how the base 2 shakes in the horizontal direction, the control moving frame 3 does not shake therewith, i.e. the gap between the moving frame 3 and the rectangular chute 6 can be kept dynamically stable all the time.
In control, the sizes of the energizing currents of the electromagnet a and the electromagnet b which are transversely arranged are respectively acquired by adopting the Hall elements A1 and a2, and the transverse gap between the movable frame 3 and the rectangular chute 6 is acquired in real time by the distance sensor A1; similarly, the magnitudes of the energizing currents of the electromagnet c and the electromagnet d which are longitudinally arranged are respectively acquired by adopting the Hall elements b1 and b2, and the longitudinal gap between the movable frame 3 and the rectangular chute 6 is acquired in real time by the distance sensor A2.
The PLC controller adjusts the switching frequency of a switching device in each pulse width modulation unit (the pulse width modulation units are sequentially marked as pulse width modulation unit a, pulse width modulation unit b, pulse width modulation unit c and pulse width modulation unit d) by adopting a PID algorithm according to current data acquired by each Hall element and transverse gap/longitudinal gap data fed back by a distance sensor in real time, and each pulse width modulation unit is correspondingly connected with one electromagnet so as to adjust the energizing current of each electromagnet in real time, so that the magnetic force induced by the electromagnet is correspondingly changed, and four magnetic conduction blocks arranged on the movable frame 3 drive the movable frame 3 to correspondingly operate under the action of the magnetic force, and further maintain the dynamic stability of the movable frame 3 in the horizontal direction.
The bottom of the rectangular chute 6 in this embodiment is provided with ball grooves 16 corresponding to four corners of the moving frame 3, and balls 17 are correspondingly provided in each ball groove 16, so that when the base 2 vibrates under the action of external force, the moving frame 3 slides horizontally relative to the base 2, and when the base moves relatively, the two are connected in a sliding friction manner, thereby further ensuring the stability of the moving frame 3 during movement and reducing friction loss.
In this embodiment, the elastic clamping seat 4 has a base 18, clamping plates 19 are correspondingly arranged at the left and right sides of the base 18, elastic rollers 20 are respectively mounted at the end parts of each clamping plate 19, an elastic cushion block 21 is arranged on the upper end surface of the base 18, the bottom of the base 18 is provided with an arc surface structure 22, and the arc surface structure 22 at the bottom of the base 18 sinks into the moving frame 3 when being assembled, so that the center of gravity of the base 18 moves downwards into the moving frame 3, and the stability of the elastic clamping seat 4 on the mounting structure is ensured.
In this embodiment, the elastic member includes four support columns a23 disposed on the side of the moving frame and four support columns b24 disposed on the side of the elastic clamping seat, where the support columns a23 and b24 are horizontally disposed, the support column a23 is provided with an index a26, the support column b24 is provided with an index b27, and each support column a and b is connected through a viscoelastic member 25.
The anti-shake control principle of the anti-shake seat on the vertical direction of the lens of the law enforcement recorder 1 is as follows:
referring to fig. 7, when the law enforcement recorder 1 is not jittering in the vertical direction, the center of gravity of the elastic card holder 4 (mounted with the law enforcement recorder 1) is set on the axis A1, wherein the elastic card holder 4 is axisymmetrically designed with the center of gravity at the geometric center thereof;
when the law enforcement recorder 1 shakes in the vertical direction, the law enforcement recorder 1 receives a force in the vertical direction, the force is set to be a vertically downward force F (can also be a vertically upward direction), at this time, the gravity centers of the elastic clamping bases 4 move down on the axis A2 in parallel, and the viscoelastic members are configured so that the respectively generated elastic forces act on the moments of the elastic clamping bases and the forces around the gravity centers of the elastic clamping bases, wherein when the index a26 and the indicator b27 are converted from the opposite arrangement to the staggered arrangement, the gravity center movement condition of the elastic clamping bases 4 can be judged;
from the above, when the law enforcement recorder 1 shakes under the action of external force, the viscoelastic member 25 is always in dynamic balance in the vertical direction, and the viscoelastic member 25 can play the effect of vibration attenuation on the vibration of the law enforcement recorder 1, meanwhile, the higher the vibration frequency of the law enforcement recorder 1 is, the larger the attenuation is, so that the definition and stability of the video shot by the monitoring staff in the monitoring process are ensured.
Claims (1)
1. A portable invigilator's device, characterized by: the anti-shake base is formed by sequentially assembling a base, a movable frame, an elastic clamping seat and a cover plate, a rectangular chute matched with the movable frame is formed in the base, one side of the base is provided with a shoulder rest, and a shoulder passing clamp or a magnetic buckle or a nylon thread gluing is assembled on the shoulder rest; the four groove walls of the rectangular sliding groove are provided with grooves A for installing electromagnets, the four outer side edges of the movable frame are provided with grooves B for installing magnetic conduction blocks, and the four electromagnets and the four magnetic conduction blocks are arranged in a one-to-one opposite manner; the elastic clamping seat is connected with the movable frame through an elastic component; the bottom end of the law enforcement recorder passes through the abdication hole on the cover plate and is arranged on the elastic clamping seat; the control device comprises a power supply device, a PLC (programmable logic controller), a distance sensor for detecting the distance between each side edge of the movable frame and the corresponding groove wall of the rectangular chute and a Hall element for detecting the current energizing current of each electromagnet, when the law enforcement recorder horizontally shifts, the PLC immediately adjusts the current transmitted to each electromagnet through a pulse width modulation unit according to the detection information fed back by the distance sensor and the Hall element in real time so as to control the dynamic stability of the law enforcement recorder in the horizontal direction relative to the anti-shake seat; the bottom of the rectangular chute is provided with ball grooves corresponding to four corners of the movable frame, and each ball groove is correspondingly provided with a ball; the elastic clamping seat is provided with a base, clamping plates are correspondingly arranged on the left side and the right side of the base, elastic rollers are arranged at the end parts of each clamping plate, an elastic cushion block is arranged on the upper end surface of the base, the bottom of the base is provided with an arc surface structure, and the arc surface structure at the bottom of the base sinks into the moving frame when being assembled; the elastic member comprises four support columns a arranged on the side of the movable frame and four support columns b arranged on the side of the elastic clamping seat, the support columns a and b are horizontally arranged, and each support column a and each support column b are connected through a viscoelastic member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711338342.4A CN107781610B (en) | 2017-12-14 | 2017-12-14 | Portable invigilator's device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711338342.4A CN107781610B (en) | 2017-12-14 | 2017-12-14 | Portable invigilator's device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107781610A CN107781610A (en) | 2018-03-09 |
| CN107781610B true CN107781610B (en) | 2023-07-18 |
Family
ID=61437180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711338342.4A Active CN107781610B (en) | 2017-12-14 | 2017-12-14 | Portable invigilator's device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107781610B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149175A (en) * | 1994-09-20 | 1997-05-07 | 松下电器产业株式会社 | Objective actuator and manufacturing method thereof |
| JPH10243280A (en) * | 1997-02-28 | 1998-09-11 | Rhythm Watch Co Ltd | Solid-state image-pickup device camera |
| CN102466942A (en) * | 2010-11-03 | 2012-05-23 | 三星电机株式会社 | Image photographing device having function for compensation hand vibration |
| CN202353664U (en) * | 2011-12-06 | 2012-07-25 | 中国钓具技术标准化(北仑海伯)研究中心 | Mounting structure for camera |
| CN203548453U (en) * | 2013-11-26 | 2014-04-16 | 吴贵 | Multifunctional sucking disc elastic clamp |
| JP2015197627A (en) * | 2014-04-02 | 2015-11-09 | 厦▲門▼新▲鴻▼洲精密科技有限公司Ｘｉｎｈｏｎｇｚｈｏｕ Ｐｒｅｃｉｓｉｏｎ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ，．Ｌｔｄ | camera module |
-
2017
- 2017-12-14 CN CN201711338342.4A patent/CN107781610B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149175A (en) * | 1994-09-20 | 1997-05-07 | 松下电器产业株式会社 | Objective actuator and manufacturing method thereof |
| JPH10243280A (en) * | 1997-02-28 | 1998-09-11 | Rhythm Watch Co Ltd | Solid-state image-pickup device camera |
| CN102466942A (en) * | 2010-11-03 | 2012-05-23 | 三星电机株式会社 | Image photographing device having function for compensation hand vibration |
| CN202353664U (en) * | 2011-12-06 | 2012-07-25 | 中国钓具技术标准化(北仑海伯)研究中心 | Mounting structure for camera |
| CN203548453U (en) * | 2013-11-26 | 2014-04-16 | 吴贵 | Multifunctional sucking disc elastic clamp |
| JP2015197627A (en) * | 2014-04-02 | 2015-11-09 | 厦▲門▼新▲鴻▼洲精密科技有限公司Ｘｉｎｈｏｎｇｚｈｏｕ Ｐｒｅｃｉｓｉｏｎ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ，．Ｌｔｄ | camera module |
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| Publication number | Publication date |
|---|---|
| CN107781610A (en) | 2018-03-09 |
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