CN111895237A - Road and bridge concrete structure monitoring devices - Google Patents
Road and bridge concrete structure monitoring devices Download PDFInfo
- Publication number
- CN111895237A CN111895237A CN202010796474.7A CN202010796474A CN111895237A CN 111895237 A CN111895237 A CN 111895237A CN 202010796474 A CN202010796474 A CN 202010796474A CN 111895237 A CN111895237 A CN 111895237A
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- buffer
- fixed
- springs
- cylinder body
- fixedly connected
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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
- 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
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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
- 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
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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
- 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
- F16F15/06—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 with metal springs
- F16F15/067—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 with metal springs using only wound springs
Abstract
The invention relates to the technical field of road and bridge construction, and discloses a road and bridge concrete structure monitoring device which comprises a camera fixed with a fixing frame through a support rod, wherein the fixing frame is connected with a guardrail to fix the camera on the guardrail, a first cavity is defined between a buffer shell and the guardrail, the first fixing seat is uniformly fixed on the inner wall of the upper end of the buffer shell, the second fixing seat is fixed on the upper end surface of the guardrail, first springs are distributed in the first cavity, second springs are distributed in the first cavity, the cross section of a cushion is in an I shape, the upper end of the cushion is fixedly connected with the second end of the first spring, and the lower end of the cushion is fixedly connected with the second end of the second spring. According to the invention, through the designed buffer shell, a layer of buffer structure is added between the fixing frame and the guardrail, so that the amplitude transmitted to the fixing frame is greatly reduced, the camera is effectively resistant to earthquake, the local structure of the road and bridge shot by the camera is ensured to be clear, and the road and bridge are effectively monitored.
Description
Technical Field
The invention relates to the technical field of road and bridge construction, in particular to a road and bridge concrete structure monitoring device.
Background
With the sustainable and high-speed development of economy and society in China, the scale and speed of the highway bridge which is used as the industry of key investment construction in the economic construction in China are not developed in the past. Concrete is the main material of modern civil engineering, and can be poured and formed into building structures of any specific shape on the construction site according to the design of civil engineers. Due to errors in the design, construction and maintenance processes of the road and bridge structure, natural defects in engineering materials, external environment changes, increasing traffic volume and load capacity and other factors, along with the increase of service time, crack deformation and other conditions can occur on the local part of the road and bridge structure, and the road and bridge concrete structure is generally required to be monitored.
The monitoring system generally comprises a front-end camera and a rear-end software system, the monitoring system is widely applied to all big, medium and small cities in China at present, and in the road and bridge concrete structure monitoring device, a plurality of cameras are often fixedly installed on road and bridge railings to monitor the local structure condition of the road and bridge concrete.
Although current camera is the high definition camera, because the road and bridge traffic vehicle is numerous, and often there is heavy-duty vehicle such as freight train to travel, make the road and bridge can produce certain vibration, lead to installing the camera that is used for monitoring road and bridge local structure on the bridge to produce the shake to cause the road and bridge local structure that the camera monitoring was shot fuzzy, be difficult to monitor the local deformation or the crack of bridge, thereby be difficult to realize the effective monitoring to road and bridge.
Disclosure of Invention
The invention provides a road and bridge concrete structure monitoring device, and aims to provide a device capable of effectively weakening vibration of a road and bridge transmitted to a camera.
The invention provides a road and bridge concrete structure monitoring device, which comprises:
the camera, the camera passes through the bracing piece to be fixed with the mount, and the mount is connected with the guardrail to be fixed in the guardrail with the camera on, still include:
the buffer shell is a hollow shell with the upper end closed and the lower end open, the upper end of the buffer shell is fixedly connected with the lower end of the fixing frame, the lower part of the buffer shell is sleeved on the outer peripheral wall of the upper part of the guardrail, and a first cavity is defined between the buffer shell and the guardrail;
the first fixing seats are uniformly fixed on the inner wall of the upper end of the buffer shell;
the corresponding number of the second fixed seats is equal to that of the first fixed seats, and the second fixed seats are fixed on the upper end surface of the guardrail;
the first springs are distributed in the first cavity, the number of the first springs is equal to that of the first fixed seats, the first ends of the first springs are fixedly connected with the first fixed seats, and the second ends of the first springs face the direction of the guardrail;
the second springs are distributed in the first cavity, the number of the second springs is equal to that of the first fixed seats, the first ends of the second springs are fixedly connected with the second fixed seats, and the second ends of the second springs face the direction of the fixed frame;
the cross-section of blotter, blotter is the I shape, and the upper end of blotter links firmly with the second end of first spring, and the lower extreme of blotter links firmly with the second end of second spring.
Optionally, the method further includes:
the upper end and the lower end of the cylinder body are both open ends, the interior of the cylinder body is hollow, the cylinder body is arranged between the fixed frame and the buffer shell, the upper part of the cylinder body is connected with the lower part of the fixed frame in a sliding manner, the lower end of the cylinder body is fixed on the upper end surface of the buffer shell, and a second cavity is defined between the cylinder body and the fixed frame as well as between the cylinder body and the buffer shell;
the bottom end of the base is fixedly connected with the upper end face of the buffer shell, the base is provided with a first groove, and the opening of the first groove faces the direction of the fixed frame;
the rotating shaft is arranged in the first groove and is parallel to the upper end face of the buffer shell, and two ends of the rotating shaft are fixedly connected with the inner walls of two sides of the base respectively;
the lower end of the swing rod is rotatably connected with the middle position of the rotating shaft through a bearing;
the two eccentric wheels are respectively and symmetrically arranged on two sides of the swing rod, and the upper end of the swing rod is respectively and rotatably connected with the lower part of the eccentric wheels through bearings;
and two ends of the connecting rod respectively penetrate through the centers of the eccentric wheels and are fixedly connected with the inner walls of the two sides of the cylinder body.
Optionally, a plurality of third springs are uniformly distributed in the second cavity, and the upper end and the lower end of each third spring are fixedly connected with the lower end face of the fixing frame and the upper end face of the buffer shell through spring bases respectively.
Optionally, a plurality of second grooves are uniformly distributed on the outer circumferential wall of the lower portion of the fixing frame, openings of the second grooves face the outside, a plurality of third grooves are formed in the inner circumferential wall of the upper portion of the cylinder body, the openings of the third grooves are opposite to the openings of the second grooves, the third grooves correspond to the second grooves in position, and a plurality of balls are embedded in the corresponding second grooves and the corresponding third grooves, so that the upper portion of the cylinder body is in sliding connection with the lower portion of the fixing frame.
Optionally, the interior of the cushion is cellular.
Optionally, the method further includes:
the fixed plate is fixedly connected with the outer peripheral wall of the right side of the fixed frame and is positioned below the supporting rod;
the first end of telescopic link is articulated with the fixed plate, and the second end of telescopic link is articulated with the lower extreme of camera.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, through the designed buffer shell, a layer of buffer structure is additionally arranged between the fixing frame and the guardrail, so that the vibration transmitted to the camera by the road bridge is weakened, through the base and the spring arranged in the buffer shell, the amplitude transmitted by the road bridge is firstly absorbed by the spring in the buffer shell, and then the amplitude transmitted to the fixing frame is greatly weakened, particularly, through the arranged I-shaped buffer pad, the amplitude absorbed by the second spring is firstly absorbed by the second spring and then absorbed by the I-shaped buffer pad with a larger area, so that the amplitude transmitted to the first spring is greatly weakened, and therefore, the amplitude transmitted to the fixing frame is greatly reduced, so that the effective shock absorption is carried out on the camera, the local structure of the road bridge shot by the camera is ensured to be clear, and the effective monitoring on the road bridge is realized.
Drawings
Fig. 1 is a cross-sectional view of a road and bridge concrete structure monitoring device provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at G;
FIG. 3 is an enlarged view of a portion of item 1 at H;
fig. 4 is a partial enlarged view of fig. 2 at K.
Description of reference numerals:
1-camera, 2-support rod, 3-fixing frame, 4-guardrail, 5-buffer shell, 6-first fixing seat, 7-second fixing seat, 8-first spring, 9-second spring, 10-buffer pad, 11-barrel, 12-base, 13-rotating shaft, 14-oscillating bar, 15-eccentric wheel, 16-connecting rod, 17-second groove, 18-third groove, 19-rolling ball, 20-third spring, 21-spring base, 22-fixing plate and 23-telescopic rod.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, a road and bridge concrete structure monitoring device provided by the embodiment of the present invention includes: the camera comprises a camera 1, a support rod 2, a fixing frame 3, a guardrail 4, a buffer shell 5, a first fixing seat 6, a second fixing seat 7, a first spring 8, a second spring 9 and a buffer cushion 10, wherein the camera 1 is fixed with the fixing frame 3 through the support rod 2, the fixing frame 3 is connected with the guardrail 4 so as to fix the camera 1 on the guardrail 4, the buffer shell 5 is a hollow shell with the upper end closed and the lower end opened, the upper end of the buffer shell 5 is fixedly connected with the lower end of the fixing frame 3, the lower part of the buffer shell 5 is sleeved on the outer peripheral wall of the upper part of the guardrail 4, a first cavity is defined between the buffer shell 5 and the guardrail 4, the first fixing seats 6 are multiple, the first fixing seats 6 are uniformly fixed on the inner wall of the upper end of the buffer shell 5, the corresponding numbers of the positions of the second fixing seats 7 and the first fixing seats 6 are equal, the second fixing seats 7 are fixed, the quantity of first spring 8 and first fixing base 6 equals, the first end of first spring 8 links firmly with first fixing base 6, the second end of first spring 8 is towards guardrail 4 direction, second spring 9 distributes in first cavity, the quantity of second spring 9 and first fixing base 6 equals, the first end of second spring 9 links firmly with second fixing base 7, the second end of second spring 9 is towards mount 3 direction, the cross-section of blotter 10 is the I shape, the upper end of blotter 10 links firmly with the second end of first spring 8, the lower extreme of blotter 10 links firmly with the second end of second spring 9, first fixing base 6 and second fixing base 7 are used for first spring 8 and second spring 9 respectively with buffer shell 5 and guardrail 4 fixed connection, in this embodiment, blotter 10 is made by rubber.
When a large vehicle passes through a road and a bridge to generate large vibration, the vibration amplitude is firstly transmitted to the buffer shell 5 through the guardrail 4, the buffer shell 5 absorbs the vibration amplitude for the first time, the buffer shell 5 transmits the vibration amplitude to the second spring 9 inside, the second spring 9 absorbs a part of the vibration amplitude and then transmits the vibration amplitude to the I-shaped buffer pad 10, the buffer pad 10 further absorbs the vibration amplitude and transmits the vibration amplitude to the first spring 8, and the first spring 8 absorbs the vibration amplitude again and transmits the vibration amplitude to the buffer shell 5. Especially, the I-shaped buffer pad 10 that sets up makes the absorptive amplitude of second spring 9 at first after self absorption, and the 10 absorption of the I-shaped of rethread area is great, and then makes the amplitude of transmitting for first spring 8 will weaken greatly, and the amplitude of transmitting for mount 3 from this reduces greatly to effective shock attenuation has been carried out to camera 1, and the road and bridge local structure that the assurance camera monitoring was shot is clear, thereby realizes the effective monitoring to road and bridge.
Specifically, the inside of the buffer pad 10 is honeycomb-shaped, so that the vibration energy can be absorbed to the maximum extent, and the vibration damping effect of the buffer shell 5 is further improved.
As shown in fig. 3, a road and bridge concrete structure monitoring device provided by the embodiment of the present invention further includes: the structure comprises a cylinder body 11, a base 12, a rotating shaft 13, a swing rod 14, eccentric wheels 15 and connecting rods 16, wherein the upper end and the lower end of the cylinder body 11 are both open ends, the interior of the cylinder body 11 is hollow, the cylinder body 11 is arranged between a fixed frame 3 and a buffer shell 5, the upper part of the cylinder body 11 is in sliding connection with the lower part of the fixed frame 3, the lower end of the cylinder body 11 is fixed on the upper end surface of the buffer shell 5, a second cavity is defined between the cylinder body 11 and the fixed frame 3 and the buffer shell 5, the bottom end of the base 12 is fixedly connected with the upper end surface of the buffer shell 5, the base 12 is provided with a first groove, the opening of the first groove faces the direction of the fixed frame 3, the rotating shaft 13 is arranged in the first groove, the rotating shaft 13 is parallel to the upper end surface of the buffer shell 5, the two ends of the rotating shaft 13 are respectively fixedly connected with the inner walls, the upper end of the swing rod 14 is respectively connected with the lower part of the eccentric wheel 15 through a bearing in a rotating way, and the two ends of the connecting rod 16 respectively penetrate through the center of the eccentric wheel 15 and are fixedly connected with the inner walls of the two sides of the barrel 11.
The working principle is as follows: when the vibration energy of buffering shell 5 absorption upwards transmits, at first base 12 can produce and rock from top to bottom to drive pendulum rod 14 and produce the swing under the effect of pivot 13, pendulum rod 14 drives eccentric wheel 15 and produces and rotates, thereby convert vibration energy into the kinetic energy of eccentric wheel 15 and absorb, the amplitude of upwards transmitting has further been absorbed, thereby effective shock attenuation has been carried out to camera 1, the road and bridge local structure of guaranteeing that the camera monitoring was shot is clear, thereby the realization is to the effective monitoring of road and bridge.
Optionally, a plurality of third springs 20 are uniformly distributed in the second cavity, the upper and lower ends of the third springs 20 are fixedly connected with the lower end face of the fixed frame 3 and the upper end face of the buffer shell 5 through spring bases 21, and the third springs 20 can further absorb the vibration energy transmitted into the cylinder 11.
As shown in fig. 4, a plurality of second grooves 17 are uniformly distributed on the outer circumferential wall of the lower portion of the fixing frame 3, openings of the second grooves 17 face outward, a plurality of third grooves 18 are formed on the inner circumferential wall of the upper portion of the cylinder 11, openings of the third grooves 18 are opposite to the openings of the second grooves 17, and a plurality of balls 19 are embedded in the corresponding second grooves 17 and the third grooves 18, so that the upper portion of the cylinder 11 is slidably connected with the lower portion of the fixing frame 3.
In this embodiment, be 2 respectively in second recess 17 and the third recess 18, ball 19 is 3, roll at second recess 17 and third recess 18 through ball 19, the upper portion of barrel 11 and the lower part sliding connection of mount 3 have been guaranteed, if when great amplitude appears on the road deck, can avoid mount 3 to fluctuate too big through the distance of being connected of automatically regulated barrel 11 and mount 3, and then guaranteed camera 1's anti-seismic performance, guarantee that camera 1 monitors the local structure of the road and bridge of shooing clear, thereby realize the effective monitoring to the road and bridge.
The road and bridge concrete structure monitoring devices that this embodiment provided still includes: fixed plate 22 and telescopic link 23, fixed plate 22 links firmly with the right side periphery wall of mount 3, and fixed plate 22 is located the below of bracing piece 2, and the first end of telescopic link 23 is articulated with fixed plate 22, and the second end of telescopic link 23 is articulated with the lower extreme of camera 1.
In this embodiment, the telescopic rod 23 fixed between the fixing frame 3 and the camera 1 not only can be automatically extended and retracted by the telescopic rod 23 when the road deck generates vibration, so as to ensure effective shock absorption of the camera 1, but also can play a role in stably supporting the camera 1.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (6)
1. A road and bridge concrete structure monitoring devices, includes: camera (1), camera (1) is fixed through bracing piece (2) and mount (3), mount (3) are connected with guardrail (4), in order to incite somebody to action camera (1) is fixed in on guardrail (4), its characterized in that still includes:
the buffer shell (5) is a hollow shell with the upper end closed and the lower end open, the upper end of the buffer shell (5) is fixedly connected with the lower end of the fixing frame (3), the lower part of the buffer shell (5) is sleeved on the outer peripheral wall of the upper part of the guardrail (4), and a first cavity is defined between the buffer shell (5) and the guardrail (4);
the buffer shell comprises a plurality of first fixed seats (6), wherein the first fixed seats (6) are uniformly fixed on the inner wall of the upper end of the buffer shell (5);
the second fixing seat (7) is arranged corresponding to the first fixing seat (6), and the second fixing seat (7) is fixed on the upper end face of the guardrail (4);
the first springs (8) are distributed in the first cavity, the number of the first springs (8) is equal to that of the first fixing seats (6), the first ends of the first springs (8) are fixedly connected with the first fixing seats (6), and the second ends of the first springs (8) face the direction of the guardrail (4);
the second springs (9) are distributed in the first cavity, the number of the second springs (9) is equal to that of the first fixing seats (6), the first ends of the second springs (9) are fixedly connected with the second fixing seats (7), and the second ends of the second springs (9) face the direction of the fixing frame (3);
the cross section of the buffer cushion (10) is in an I shape, the upper end of the buffer cushion (10) is fixedly connected with the second end of the first spring (8), and the lower end of the buffer cushion (10) is fixedly connected with the second end of the second spring (9).
2. The road bridge concrete structure monitoring device of claim 1, further comprising a buffer portion provided between the buffer shell (5) and the fixing frame (3), the buffer portion including:
the buffer structure comprises a cylinder body (11), wherein the upper end and the lower end of the cylinder body (11) are both open ends, the interior of the cylinder body (11) is hollow, the cylinder body (11) is arranged between a fixed frame (3) and a buffer shell (5), the upper part of the cylinder body (11) is in sliding connection with the lower part of the fixed frame (3), the lower end of the cylinder body (11) is fixed on the upper end surface of the buffer shell (5), and a second cavity is defined between the cylinder body (11) and the fixed frame (3) as well as between the cylinder body (11) and the buffer shell (5);
the bottom end of the base (12) is fixedly connected with the upper end face of the buffer shell (5), the base (12) is provided with a first groove, and the opening of the first groove faces the direction of the fixed frame (3);
the rotating shaft (13) is arranged in the first groove, the rotating shaft (13) is parallel to the upper end face of the buffer shell (5), and two ends of the rotating shaft (13) are fixedly connected with the inner walls of two sides of the base (12) respectively;
the lower end of the swing rod (14) is rotatably connected with the middle position of the rotating shaft (13) through a bearing;
the two eccentric wheels (15) are symmetrically arranged on two sides of the swing rod (14), and the upper end of the swing rod (14) is rotatably connected with the lower part of the eccentric wheel (15) through a bearing;
and two ends of the connecting rod (16) respectively penetrate through the centers of the eccentric wheels (15) and are fixedly connected with the inner walls of the two sides of the cylinder body (11).
3. The road bridge concrete structure monitoring device of claim 2, wherein a plurality of third springs (20) are uniformly distributed in the second cavity, and the upper ends and the lower ends of the third springs (20) are fixedly connected with the lower end face of the fixed frame (3) and the upper end face of the buffer shell (5) through spring bases (21).
4. The road bridge concrete structure monitoring device according to claim 2, wherein a plurality of second grooves (17) are uniformly distributed on the outer peripheral wall of the lower part of the fixing frame (3), the openings of the second grooves (17) face to the outside, a plurality of third grooves (18) are arranged on the inner peripheral wall of the upper part of the cylinder body (11), the third grooves (18) are opposite to the openings of the second grooves (17), the openings of the third grooves (18) correspond to the positions of the second grooves (17), and a plurality of balls (19) are embedded in the corresponding second grooves (17) and the corresponding third grooves (18) so that the upper part of the cylinder body (11) is in sliding connection with the lower part of the fixing frame (3).
5. The road bridge concrete structure monitoring device according to claim 1, wherein the interior of the cushion pad (10) is cellular.
6. The road bridge concrete structure monitoring device of claim 1, further comprising:
the fixing plate (22), the fixing plate (22) is fixedly connected with the outer peripheral wall of the right side of the fixing frame (3), and the fixing plate (22) is positioned below the supporting rod (2);
the first end of telescopic link (23) with fixed plate (22) are articulated, the second end of telescopic link (23) with the lower extreme of camera (1) is articulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796474.7A CN111895237B (en) | 2020-08-10 | 2020-08-10 | Road and bridge concrete structure monitoring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796474.7A CN111895237B (en) | 2020-08-10 | 2020-08-10 | Road and bridge concrete structure monitoring devices |
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| CN111895237A true CN111895237A (en) | 2020-11-06 |
| CN111895237B CN111895237B (en) | 2022-02-15 |
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| CN202010796474.7A Active CN111895237B (en) | 2020-08-10 | 2020-08-10 | Road and bridge concrete structure monitoring devices |
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| CN (1) | CN111895237B (en) |
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| CN114104314A (en) * | 2021-12-02 | 2022-03-01 | 武汉珈鹰智能科技有限公司 | Unmanned aerial vehicle carrier for detecting bridge bearing |
| CN114143434A (en) * | 2021-12-08 | 2022-03-04 | 海南电网有限责任公司文昌供电局 | Anti-shaking device of tower monitoring camera |
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| Publication number | Publication date |
|---|---|
| CN111895237B (en) | 2022-02-15 |
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Inventor after: Yan Haiqi Inventor after: Zheng Xiaofeng Inventor after: Yin Liang Inventor after: Wu Shaodong Inventor after: Yang Xin Inventor before: Yan Haiqi Inventor before: Zheng Xiaofeng Inventor before: Yin Liang Inventor before: Wu Shaodong Inventor before: Yang Xin |