CN107371174B - Wharf loading and unloading remote control broadband Internet of things wireless signal coverage system - Google Patents
Wharf loading and unloading remote control broadband Internet of things wireless signal coverage system Download PDFInfo
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- CN107371174B CN107371174B CN201710632269.5A CN201710632269A CN107371174B CN 107371174 B CN107371174 B CN 107371174B CN 201710632269 A CN201710632269 A CN 201710632269A CN 107371174 B CN107371174 B CN 107371174B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1242—Rigid masts specially adapted for supporting an aerial
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- 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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a wharf hoisting remote control broadband Internet of things wireless signal coverage system, which belongs to the technical field of communication and comprises a wireless signal fixed access point arranged on a field at one side of a travelling guide rail of a gantry crane and a wireless signal mobile access point arranged at the upper part of the gantry crane and installed at the same side as the wireless signal fixed access point; a fixed antenna is arranged at the wireless signal fixed access point, and a mobile antenna which moves along with the gantry crane is arranged at the wireless signal mobile access point; the travelling surface of the mobile antenna is basically coincident with the travelling surface of the fixed antenna; through setting up the radiation angle scope of each antenna, guarantee wireless signal's reliable transmission and receiving the basis and retrain wireless signal near the antenna plane of marcing as far as possible, the interference of wireless crosstalk between the different antennas plane of marcing and the external wireless signal of restraint is restrained, the access point antenna sets up the shield plate in the one end or the both ends that are parallel to the plane of marcing, more reinforcing interference killing feature.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a wireless signal coverage system of a wharf loading and unloading remote control broadband Internet of things.
Background
At container yards at ports and terminals, movable gantry cranes are often required to load containers from the yard onto a truck or to unload containers from the truck to the yard. The container handling operation of the port and dock is always completed by manual field operation (operation and monitoring), the field operation has safety and efficiency problems, and the technical development trend is to combine remote operation with automatic operation and gradually transition to full-automatic operation. One of the core problems of remote control is the communication problem of how to effectively and accurately remotely transmit moving image information, voice information, operation and control information, and the like. The harbor operation remote control communication system has large required bandwidth and can transmit high-definition video; the requirement reliability is high, and the industrial control requirement is met. The conventional remote control communication system for loading and unloading operation adopts a wired communication technology, and the wired communication technology can meet the requirements of high bandwidth and high reliability for information transmission. However, the crane for loading and unloading operations is required to move in all the working areas, and the wired communication brings a plurality of inconveniences, and the work of wire breakage, wiring and the like also needs to be manually completed on site, so that the safety and efficiency problems still exist.
With the advancement of robot technology development, remote control of equipment is becoming more and more widely used. Due to the strong mobility and location uncertainty of dock equipment, the use of wireless communication technology is a necessary trend. However, the existing wireless communication technology is difficult to meet the requirement of high-bandwidth and high-reliability information transmission, and particularly the deployment of a signal coverage system for wireless communication has great influence on the high-bandwidth and high-reliability information transmission, and the existing coverage system is difficult to meet the requirement. In the prior art, patent document with publication number CN101641982B provides a wireless coverage system of a power tunnel, patent document with publication number CN104301135A provides a WIFI signal coverage and device network management system of the power tunnel and a method thereof, patent document with publication number CN1279783C provides a method for effectively covering a highway, and the wireless communication signal coverage systems and methods provided in these documents cannot meet the high-bandwidth and high-reliability information transmission requirements required by remote control of wireless communication for loading and unloading at a dock. The wireless communication system is used for communication between devices, so that the wireless communication system is an Internet of things, and is an industrial broadband Internet of things due to the requirement of high bandwidth and high reliability.
Disclosure of Invention
The invention aims to provide a wireless signal coverage system of a wharf loading and unloading remote control broadband Internet of things, so as to meet the high-bandwidth and high-reliability information transmission requirement required by the wharf loading and unloading remote control broadband Internet of things.
In order to achieve the above object, the wireless signal coverage system of the wharf loading and unloading remote control broadband internet of things provided by the invention comprises a wireless signal fixed access point arranged on a field along one side of a travelling guide rail of a gantry crane and a wireless signal mobile access point arranged on the upper part of the gantry crane and installed on the same side as the wireless signal fixed access point; a fixed antenna is arranged at the wireless signal fixed access point, and a mobile antenna which moves along with the gantry crane is arranged at the wireless signal mobile access point; the deviation error of the superposition of the travelling surface of the mobile antenna and the travelling surface of the fixed antenna is not more than 3 meters; taking the traveling surface of the antenna as the horizontal plane of the antenna pattern and taking the vertical plane of the plane perpendicular to the traveling surface as the vertical plane of the antenna pattern, which is the plane perpendicular to the traveling surface, the center point of the antenna:
the radiation angle alpha of the fixed antenna on the vertical plane of the directional diagram meets the formula alpha less than or equal to tan -1 (W/2H), alpha is small enough to prevent crosstalk and interference, and the radiation angle theta of the fixed antenna on the horizontal plane of the antenna pattern satisfies the formula theta not less than tan -1 (L/H), θ is large enough to ensure signal coverage on the travel path; the radiation angle beta of the mobile antenna on the vertical plane of the directional diagram meets the formula beta less than or equal to tan -1 (W/2H), beta is small enough to prevent crosstalk and interference, and the radiation angle gamma of the mobile antenna on the horizontal plane of the antenna pattern meets the formula gamma being larger than or equal to tan -1 (L/H), γ is large enough to ensure signal coverage on the travel path;
wherein L is the length of a wireless signal radiation band of a single container yard along the travelling direction of the gantry crane, W is the width of the radiation band, and H is the height difference between a mobile antenna and a fixed antenna.
In the above technical solution, the wireless signal finally covers the working field through the antenna, and the radiation direction characteristic of the antenna can be seen from the antenna pattern, where the antenna pattern refers to a pattern that the relative field strength (normalized modulus value) of the radiation field changes with direction at a certain distance from the antenna, and is generally represented by two perpendicular plane patterns in the maximum radiation direction through the antenna. The main lobe width (also called lobe width) is a physical quantity that measures the sharpness of the maximum radiation area of the antenna, taking the width between two half-power points of the main lobe of the antenna pattern, expressed in terms of angle, also called radiation angle herein. By setting the radiation angles of the antennas, the wireless signals are ensured to be restrained near the advancing surfaces of the antennas as much as possible on the basis of reliable transmission and reception, a long and narrow radiation band is formed, communication signals are enhanced, wireless crosstalk between advancing surfaces of different antennas is restrained, interference of external wireless signals is restrained, and therefore bandwidth is improved and reliability is enhanced.
The center of the fixed antenna is positioned on a traveling surface passing through the center of the movable antenna, and the traveling surface passes through the center point of the corresponding antenna and is perpendicular to the ground. To ensure reliable transmission and reception of signals.
Another specific scheme is that two ends of the gantry crane are provided with movable antennas.
The preferred scheme is that the mobile antenna and the fixed antenna are directional antennas; the mobile antenna is provided with a shielding plate at one end parallel to the travelling surface; the fixed antenna is provided with shielding plates at both ends parallel to the traveling surface.
Directional antennas exhibit radiation over a range of angles in two mutually perpendicular planar patterns. By providing a shielding plate to block external signal interference, since the mobile antenna is provided on the gantry crane, the signal at its mounting end is blocked by the gantry crane, and thus, the shielding plate does not need to be provided.
Another preferable scheme is that the mobile antenna is an omni-directional antenna, the fixed antenna is a directional antenna, and a shielding plate is arranged at one end of the mobile antenna parallel to the travelling surface; the fixed antenna is provided with shielding plates at both ends parallel to the traveling surface.
A further preferred solution is that the mobile antennas and the fixed antennas are directional antennas; the mobile antenna is provided with a shielding plate at one end parallel to the travelling surface; the fixed antenna is provided with shielding plates at both ends parallel to the traveling surface.
An omni-directional antenna, i.e. one that exhibits a 360 deg. uniform or nearly uniform radiation in one pattern (usually a horizontal pattern), is so-called non-directional, but exhibits a range of angles in the pattern perpendicular thereto.
Compared with the prior art, the invention has the beneficial effects that:
the invention can set a plurality of fixed access points to adapt to a larger range and a plurality of yards, and the wireless signal mobile access point can establish a wireless link with different wireless signal fixed access points to ensure that wireless communication can be switched or roamed in a cross-region manner, and the reliability is improved. Meanwhile, the running surface of the mobile antenna is overlapped with that of the fixed antenna, so that reliable transmission and reception of wireless signals are ensured. And shielding plates are arranged at one end or two ends of the access point antenna, which are parallel to the travelling surface, so that the anti-interference capability is further enhanced.
Drawings
FIG. 1 is a schematic view of a yard and a surrounding roadway of the yard according to an embodiment of the present invention;
fig. 2 is a view of an antenna mounting schematic of an embodiment of the present invention perpendicular to a plane of travel;
FIG. 3 is a view of a schematic view of the radiation angles of a fixed antenna and a moving antenna in parallel to a plane of travel of an embodiment of the present invention;
FIG. 4 is a schematic diagram of a storage yard with multiple antenna running surfaces according to an embodiment of the present invention;
FIG. 5 is a schematic view of a mobile antenna of an embodiment of the present invention mounted on both ends of a crane;
fig. 6 is a schematic view of a fixed antenna according to an embodiment of the present invention, in which shielding plates are disposed at both ends parallel to a traveling surface when the fixed antenna is a directional antenna;
fig. 7 is a schematic view of a mobile antenna according to an embodiment of the present invention, in which a shielding plate is disposed at one end parallel to a traveling surface when the mobile antenna is a directional antenna;
fig. 8 is an example of providing shielding plates at both ends parallel to a traveling plane when the fixed antenna and the mobile antenna of the embodiment of the present invention are omni-directional antennas, for deployment when omni-directional antennas are employed.
Detailed Description
The invention is further described below with reference to examples and figures thereof.
Examples
Referring to fig. 1, a plurality of container yards 1 are provided at a port and a dock, each container yard 1 is rectangular, and straight roads are arranged around the container yards for a crane to pass through. The container yard 1 is used as a working site for loading and unloading operations, and the gantry crane only linearly moves along the length direction in the whole working site and stops at a designated place for loading and unloading operations. A work site has a width such that the work site has a plurality of parallel straight lines of travel, and the gantry crane performs line and field changing through the roads surrounding the work site.
In this embodiment, a plane including a straight line of travel of the gantry crane at the work site and perpendicular to the ground is defined as a travel plane; the plane of travel past the center point of the antenna is referred to as the antenna plane of travel.
Referring to fig. 2 to 4, the wharf loading and unloading remote control broadband internet of things wireless signal coverage system comprises a plurality of wireless signal fixed access points 6 installed in a container yard 1 or at the edge of the yard, and a wireless signal mobile access point installed on a gantry crane 7 and moving along with the gantry crane 7, wherein an antenna 2 is arranged on the wireless signal fixed access point 6, the antenna 2 is connected with the wireless signal fixed access point 6 through a feeder 5, and an antenna 3 is arranged on the wireless signal mobile access point. A wireless link can be established between the wireless signal mobile access point and a different wireless signal fixed access point 6, and when the wireless signal mobile access point communicates with one of the wireless signal fixed access points 6, the running surface of the antenna 3 of the wireless signal mobile access point coincides with the running surface of the antenna 2 of the wireless signal fixed access point 6, and the superposition deviation error is not more than 3 meters, so as to ensure the accessibility of signals.
Taking the antenna traveling surface 4 as the horizontal plane of the antenna pattern, taking the vertical plane which is perpendicular to the antenna traveling surface 4 and passes through the center point of the antenna as the vertical plane of the antenna pattern, wherein the radiation angle 11 on the vertical plane of the antenna pattern on the wireless signal fixed access point 6 is alpha, and the radiation angle 13 on the horizontal plane of the antenna pattern is theta; the radiation angle 12 on the vertical plane of the antenna pattern on the wireless signal mobile access point is beta and the radiation angle 14 on the horizontal plane of the antenna pattern is gamma.
More than one antenna may be located at each wireless signal access point, and the radiation angle in this embodiment refers to the radiation angle formed by combining all antennas at one access point. Since the access point antenna pattern vertical plane of the present embodiment is parallel to the working field plane and the antenna pattern horizontal plane is perpendicular to the working field plane, the antenna is laterally disposed in the present embodiment.
A container yard 1 may have multiple antenna running surfaces 4, fig. 4, to accommodate the different positions of the gantry crane in the yard. Let H be the height difference of the movable antenna and the fixed antenna, L be the length of the wireless signal radiation band of the single container yard along the travelling direction of the gantry crane, in this embodiment, it is equal to the length L of the single container yard, W is the width of the radiation band, W should be smaller than the interval of two adjacent travelling surfaces to effectively reduce the crosstalk between different radiation bands, the smaller W is, the better the anti-crosstalk effect is; however, the W is too small, the radiation band is too narrow, the requirements on the antenna installation precision and the straight line trend precision of the gantry crane are very high, and the implementation is not easy in engineering. When a wireless signal fixed access point is arranged at the initial end of the container yard 1 in the length direction, the relation between each radiation angle alpha, beta, theta and gamma and W, H and l is as follows:
the radiation angle alpha of the fixed antenna on the vertical plane of the directional diagram meets the formula alpha less than or equal to tan -1 (W/2H)；
The radiation angle theta on the horizontal plane of the antenna pattern satisfies the formula theta not less than tan -1 (l/H)；
The radiation angle beta of the mobile antenna on the vertical plane of the directional diagram meets the formula beta less than or equal to tan -1 (W/2H)；
The radiation angle gamma on the horizontal plane of the antenna pattern satisfies the formula gamma being larger than or equal to tan -1 (l/H)。
When the set radiation band width W=6 meters, the height difference H=20 meters of the mobile antenna and the fixed antenna, the length l=200 meters of the container yard, and the radiation angle alpha is less than or equal to 8.53 degrees on the vertical plane of the antenna pattern on the wireless signal fixed access point 6, and the radiation angle theta is more than or equal to 84.3 degrees on the horizontal plane of the antenna pattern; the radiation angle beta on the vertical plane of the antenna pattern on the wireless signal mobile access point is less than or equal to 8.53 degrees, and the radiation angle gamma on the horizontal plane of the antenna pattern is more than or equal to 84.3 degrees. Considering that the radiation angle parameters of an actual antenna product are only limited and cannot be arbitrary, α=8°, θ=90°, β=8°, γ=90° can be taken.
When the wireless signal fixed access points are set at the starting end and the terminal end of the container yard 1 in the length direction, l=l/2 can be set, and the relation between the radiation angles α, β, θ and γ and W, H and L is as follows:
the radiation angle alpha of the fixed antenna on the vertical plane of the directional diagram is less than or equal to tan -1 (W/2H)，
The radiation angle theta is larger than or equal to tan on the horizontal plane of the antenna pattern -1 (l/2H)，
Radiation angle beta of mobile antenna on vertical plane of directional diagram is less than or equal to tan -1 (W/2H)，
The radiation angle gamma is more than or equal to 2tan on the horizontal plane of the antenna pattern -1 (l/2H)。
When the set radiation band width W=6m, the height difference H=20m of the mobile antenna and the fixed antenna, the length l=200m of the container yard, and the starting end and the terminal end of the container yard 1 in the length direction are provided with wireless signal fixed access points, according to the formula, the radiation angle alpha on the vertical plane of the antenna pattern on the wireless signal fixed access point 6 is less than or equal to 8.53 degrees, and the radiation angle theta on the horizontal plane of the antenna pattern is more than or equal to 78.69 degrees; the radiation angle beta on the vertical plane of the antenna pattern on the wireless signal mobile access point is less than or equal to 8.53 degrees, and the radiation angle gamma on the horizontal plane of the antenna pattern is more than or equal to 157.38 degrees. Considering that the radiation angle parameters of the actual antenna products are limited and cannot be arbitrary, α=8°, θ=90°, β=8°, γ=180° antennas generally need 2 or more directional antennas to synthesize, and a single 360 ° antenna, i.e. an omni-directional antenna, can be used instead.
Of course, the wireless signal fixed access point may be provided at any position in the longitudinal direction of the container yard 1, and is not limited to the above two cases.
Referring to fig. 5, the mobile access point antennas of the present embodiment are installed on both sides of the top end of the gantry crane 7, and the wireless signal mobile access point antennas 3 are installed on both ends of the crane, or the antennas 3 may be installed on only one end. The purpose of the two ends of the gantry crane 7 being provided with the antennas 3 is to be able to receive signals from both sides, so that the gantry crane 7 can receive signals from both sides of the antenna running surface 4; if the gantry crane 7 has an antenna 3 mounted at only one end, the gantry crane 7 can receive signals only on one side of the antenna running surface.
For the case that the antenna is a directional antenna, referring to fig. 6, the antenna 2 of the wireless signal fixed access point 6 is provided with a shielding plate 22 and a shielding plate 23 at both ends of a parallel antenna traveling surface for enhancing anti-interference capability, the antenna 2 is fixed on a supporting rod 23 through an antenna bracket 25, and the supporting rod 23 is fixed on the ground. Referring to fig. 7, the antenna 3 of the wireless signal mobile access point has a shielding effect because one end is close to the gantry crane, the gantry crane plays a shielding role, one end of the shielding plate 22 can be simplified and subtracted, the shielding plate 21 is only arranged at one end of the supporting rod 23 far away from the gantry crane, the supporting rod 23 is fixed on the gantry crane, and the antenna 3 is fixed on the supporting rod 23 through the antenna bracket 25.
For the case that the antenna is an omni-directional antenna, referring to fig. 8, the antenna is provided with shielding plates 22 and 23 at both ends parallel to a traveling surface, the supporting rods 23 are made of a metal material to enhance strength, and the antenna is fixed at the 23 positions of the supporting rods through an antenna bracket 25 so that a signal is not blocked by the supporting rods 23, the shielding plates at both ends are supported by auxiliary supporting rods 24, and the auxiliary supporting rods 24 are made of a material which does not significantly weaken the signal.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. A wharf loading and unloading remote control broadband Internet of things wireless signal coverage system comprises a wireless signal fixed access point arranged on a field at one side of a travelling guide rail of a gantry crane and a wireless signal mobile access point arranged at the upper part of the gantry crane and installed at the same side as the wireless signal fixed access point;
the method is characterized in that:
the wireless signal fixed access point is provided with a fixed antenna, and the wireless signal mobile access point is provided with a mobile antenna which moves along with the gantry crane;
the deviation error of the superposition of the travelling surface of the mobile antenna and the travelling surface of the fixed antenna is not more than 3 meters;
taking the travelling plane of the antenna as the horizontal plane of the antenna pattern and taking the vertical plane of the plane perpendicular to the travelling plane as the antenna pattern and passing through the central point of the antenna, then:
the radiation angle alpha of the fixed antenna on the vertical plane of the directional diagram meets the formula alpha less than or equal to tan -1 (W/2H) the radiation angle θ satisfies the formula θ. Gtoreq.tan on the horizontal plane of the antenna pattern -1 (L/H)；
The radiation angle beta of the mobile antenna on the vertical plane of the directional diagram meets the formula beta being less than or equal to tan -1 (W/2H) the radiation angle gamma in the horizontal plane of the antenna pattern satisfies the formula gamma. Gtoreq.tan -1 (L/H)；
Wherein L is the length of a wireless signal radiation band of a single container yard along the travelling direction of the gantry crane, W is the width of the radiation band, and H is the height difference between a mobile antenna and a fixed antenna.
2. The terminal loading and unloading remotely controlled broadband internet of things wireless signal coverage system of claim 1, wherein:
the center of the fixed antenna is positioned on a traveling surface passing through the center of the movable antenna, and the traveling surface passes through the center point of the corresponding antenna and is perpendicular to the ground.
3. The terminal loading and unloading remotely controlled broadband internet of things wireless signal coverage system of claim 1, wherein:
and the two ends of the gantry crane are provided with movable antennas.
4. A terminal loading remote control broadband internet of things wireless signal coverage system according to any one of claims 1 to 3, wherein:
the mobile antenna and the fixed antenna are directional antennas;
the mobile antenna is provided with a shielding plate at one end parallel to the travelling surface;
the fixed antenna is provided with shielding plates at both ends parallel to the traveling surface.
5. A terminal loading remote control broadband internet of things wireless signal coverage system according to any one of claims 1 to 3, wherein:
the mobile antenna is an omni-directional antenna, and the fixed antenna is a directional antenna;
the mobile antenna is provided with a shielding plate at one end parallel to the travelling surface;
the fixed antenna is provided with shielding plates at both ends parallel to the traveling surface.
6. A terminal loading remote control broadband internet of things wireless signal coverage system according to any one of claims 1 to 3, wherein:
the mobile antenna and the fixed antenna are all omni-directional antennas;
the mobile antenna is provided with a shielding plate at one end parallel to the travelling surface;
the fixed antenna is provided with shielding plates at both ends parallel to the traveling surface.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003072952A (en) * | 2001-08-31 | 2003-03-12 | Ishikawajima Harima Heavy Ind Co Ltd | Operating and managing method, and managing device of stockyard |
| CN104301135A (en) * | 2014-09-10 | 2015-01-21 | 山东康威通信技术股份有限公司 | Electric power tunnel WIFI signal coverage and equipment network management system and method thereof |
| CN207135284U (en) * | 2017-07-28 | 2018-03-23 | 浙江大学 | Stevedoring remote control broadband Internet of Things radio signal coverage system |
-
2017
- 2017-07-28 CN CN201710632269.5A patent/CN107371174B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003072952A (en) * | 2001-08-31 | 2003-03-12 | Ishikawajima Harima Heavy Ind Co Ltd | Operating and managing method, and managing device of stockyard |
| CN104301135A (en) * | 2014-09-10 | 2015-01-21 | 山东康威通信技术股份有限公司 | Electric power tunnel WIFI signal coverage and equipment network management system and method thereof |
| CN207135284U (en) * | 2017-07-28 | 2018-03-23 | 浙江大学 | Stevedoring remote control broadband Internet of Things radio signal coverage system |
Non-Patent Citations (2)
| Title |
|---|
| 叶辉.LTE分布系统天线解决方案.《中国新通信》.2016,第60-62页. * |
| 戴巍.基于无线技术的集装箱起重设备监控系统.《起重运输机械》.2011,第96-99页. * |
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