CN209949118U - Wireless communication system of stacker-reclaimer - Google Patents

Abstract

The utility model relates to a stacker-reclaimer wireless communication system belongs to ethernet communication field. This stacker-reclaimer wireless communication system includes: the vehicle-mounted directional antenna is arranged on the stacker-reclaimer through a vehicle-mounted antenna bracket, is connected with a vehicle-mounted wireless access point, and is accessed into a vehicle-mounted Ethernet through a wired cable or an optical cable; the ground directional antenna is arranged at the end point of the operation track of the stacker-reclaimer through a ground antenna support, is connected with a ground wireless access point and is accessed into a ground Ethernet through wired connection, wherein the vehicle-mounted directional antenna is arranged opposite to the ground directional antenna, and the plane center perpendicular line of the vehicle-mounted directional antenna and the plane center perpendicular line of the ground directional antenna coincide with the virtual reference line. According to the utility model discloses a stacker-reclaimer wireless communication system participates in equipment minimum, and the cost is minimum, and it is most convenient to maintain to the stable effective transmission of data has been realized.

Description

Wireless communication system of stacker-reclaimer

Technical Field

The utility model relates to an ethernet communication field, concretely relates to stacker-reclaimer wireless communication system.

Background

The stacker-reclaimer is also called a bucket-wheel stacker-reclaimer, a stacker and a reclaimer, and is a novel high-efficiency continuous loading and unloading machine. The device is mainly used for loading and unloading iron ores (sand), coal, sand and other places in bulk material storage yards of bulk cargo professional docks, steel plants, large-scale thermal power plants, mines and the like. The machine is widely applied at home and abroad due to high operation efficiency.

The stacker-reclaimer adopts the mode of tow cable to provide electric power and communication connection for the stacker-reclaimer, and wherein control system uses two types of cables to realize removing the data connection between stacker-reclaimer and the ground control system:

1. the industrial cable is connected with a switching value contact between an onboard PLC (programmable logic controller) of the stacker-reclaimer and a ground PLC control system;

2. ethernet cables transmit control and monitoring data between airborne and ground control systems.

Industrial cable connections provide the critical switching volume contact connections required by control systems and are generally not an alternative.

With the progress of scientific technology, the stacker-reclaimer needs to be provided with more new systems. These systems (e.g., all-terrain laser scanners) rely entirely on ethernet communications to communicate monitoring data between the stacker and reclaimer machines and the ground control system. Ethernet communications are therefore becoming increasingly important.

In order to be suitable for the characteristic of a cable dragging coil, the Ethernet optical cable used by the stacker-reclaimer has higher requirements on tensile and compression resistance, bending performance and even corrosion resistance. These special requirements make the cables costly and self-weight. The optical cable has heavy self weight and inevitably brings energy waste. The long-term dragging and curling of the cable can cause abrasion to the cable itself and to the equipment. Although special optical cables are used, it is still impossible to avoid the optical fibers inside the optical cables from breaking the fusion point due to the pulling action, thereby causing the communication to be interrupted. It is more time consuming and laborious if the cable is disconnected or needs to be replaced. Many more stacker-reclaimers do not allow for the use of ethernet cables due to their own structural or field environment constraints.

Another ethernet communication technology, wireless ethernet communication technology, is rapidly developing and widely used compared to wired ethernet communication. The wireless Ethernet communication has the advantages of simple and visual communication path, simpler installation, lower cost, convenient maintenance and the like. In order to apply wireless ethernet technology to stacker-reclaimers, there have been many attempts in recent years. However, these attempts have resulted in the wireless ethernet communication system not being able to fully and independently undertake the ethernet communication task between the vehicle and the ground due to the low wireless communication rate, unstable data transmission and long data transmission delay time. Some stacker-reclaimers, despite the wireless communication devices installed, eventually rely on the cable to perform data transmission tasks and the test results should fail completely.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a complete scheme of one set of wireless ethernet communication system of using on stacker-reclaimer uses this set of scheme to make wireless ethernet communication carry out the communication of ethernet data completely independently, provides stable data communication for between on-vehicle control system and the ground control system. The utility model discloses use redundant wireless communication technique in the wireless communication system of stacker-reclaimer for the first time. Two pairs of wireless communication lines for independent communication are adopted, and according to different protocols, the structure can ensure that at least one of the two wireless communication lines is in a communication state, or ensure that data of at least one of the two lines can reach the opposite system, thereby achieving the communication effect of zero packet loss.

According to the utility model discloses an aspect provides a stacker-reclaimer wireless communication system, wireless communication system includes:

the vehicle-mounted directional antenna is arranged on the stacker-reclaimer through a vehicle-mounted antenna bracket, is connected with a vehicle-mounted wireless access point, and is accessed into a vehicle-mounted Ethernet through a wired cable or an optical cable;

the ground directional antenna is arranged at the end point of the operation track of the stacker-reclaimer through a ground antenna bracket, is connected with a ground wireless access point and is accessed to a ground Ethernet through wired connection;

wherein the vehicle-mounted directional antenna and the ground directional antenna are arranged oppositely, and the plane center perpendicular line of the vehicle-mounted directional antenna and the plane center perpendicular line of the ground directional antenna arranged correspondingly are superposed with the virtual reference line,

the vehicle-mounted directional antenna and the ground directional antenna are rectangular planes with the same size, and the central point of each rectangular plane is an antenna signal emitting point. The radio signal can be approximated as being emitted along the perpendicular to the center of the radio plane.

Here, the plane center perpendicular of the directional antenna is defined as a perpendicular line passing through the center point and perpendicular to the plane on the plane of the directional antenna.

Furthermore, the HPBW emergence angle of the vehicle-mounted directional antenna and the ground directional antenna is 15-20 degrees.

Further, on-vehicle antenna boom and ground antenna boom are the same structure, include:

the round rod component is used for fixing the vehicle-mounted directional antenna and the ground directional antenna;

the round rod part is fixed on a first side surface of the square metal part, and a second side surface opposite to the first side surface is used for being fixed on a stacker-reclaimer or at the end point of a track;

the round bar member is fixed on the first side surface of the square metal member by an upper connecting member and a lower connecting member,

the perpendicular line of the round bar component is parallel to one of the two plane central lines of the vehicle-mounted directional antenna and the ground directional antenna,

wherein the round bar part can be position-corrected by adjusting the upper connecting part and the lower connecting part, thereby ensuring that the round bar part is perpendicular to a horizontal plane in one direction.

Here, the perpendicular line of the round bar member is defined as a straight line passing through center points of upper and lower circular surfaces of the round bar member, the plane center line of the directional antenna is defined as a straight line passing through the center point of the plane and being parallel to two mutually perpendicular edges of the plane, and one directional antenna includes both horizontal and vertical plane center lines.

Further, the upper connecting part comprises an upper bolt and a lower screw, and the lower connecting part comprises a lower screw and a lower bolt.

Furthermore, a round hole is formed in the first side face of the square metal part at the lower bolt, an arc-shaped long hole is formed in the upper bolt, and the upper bolt can slide in the arc-shaped long hole. The screw rod slides in the arc-shaped long hole, so that the vertical of the circular rod part to the horizontal plane can be adjusted in one direction.

Furthermore, an elastic component is arranged between the round hole and the arc-shaped long hole, and the round rod component is subjected to position correction by adjusting the position of the upper bolt in the arc-shaped long hole and the distance between the upper screw rod and the lower screw rod relative to the first side face, so that the round rod component is perpendicular to the horizontal plane in the other direction.

Further, the square metal part is a square pipe.

Further, the elastic component is a spring piece.

Furthermore, the shapes of the vehicle-mounted directional antenna and the ground directional antenna are planar regular quadrangles, and the planar quadrangles are convenient to test, position and adjust. The back of the antenna is provided with a supporting component which comprises a rotating component and a hoop component,

the rotating component realizes horizontal rotation and vertical rotation of the vehicle-mounted directional antenna and the ground directional antenna;

the hoop component is used for fastening the antenna on the round rod component.

The effect of the combination of the directional antenna plane member and the support member is that the perpendicular to the pole member secured by the hoop is parallel to the vertical plane centerline of the directional antenna plane.

The stacker-reclaimer includes: cantilever bucket-wheel stacker reclaimers, bridge bucket-wheel stacker reclaimers, gate-type bucket-wheel stacker reclaimers; a gate type scraper reclaimer and a roller blending reclaimer; and a rotary stacker, a blending stacker and a rocker arm stacker.

When being applied to cantilever bucket-wheel stacker-reclaimer, on-vehicle directional aerial locates the first portal of stacker-reclaimer or can guarantee that there is not the separation between on-vehicle directional aerial and the ground directional aerial, does not receive the position of sheltering from through on-vehicle antenna boom.

Furthermore, the vehicle-mounted directional panel antenna and the ground directional panel antenna are arranged 2.5m to 3.5 m away from the ground.

Furthermore, the ground directional antenna is arranged on an electric pole at the end point of the operation track of the stacker-reclaimer through a ground antenna bracket.

Furthermore, the ground directional antenna is arranged on a wall at the end point of the operation track of the stacker-reclaimer through a ground antenna bracket.

According to the utility model discloses a second aspect provides a stacker-reclaimer wireless communication system, a serial communication port, wireless communication system includes:

the system comprises a first vehicle-mounted directional antenna and a second vehicle-mounted directional antenna, wherein the first vehicle-mounted directional antenna and the second vehicle-mounted directional antenna are respectively arranged on a stacker-reclaimer through vehicle-mounted antenna supports and are respectively connected with a vehicle-mounted wireless access point, the vehicle-mounted wireless access point is connected with a vehicle-mounted redundancy management switch, and the vehicle-mounted redundancy management switch is connected with a vehicle-mounted Ethernet;

the system comprises a first ground directional antenna and a second ground directional antenna, wherein the first ground directional antenna and the second ground directional antenna are respectively arranged at the end point of a running track of the stacker-reclaimer through a ground antenna support and are respectively connected with a ground wireless access point, the ground wireless access point is connected with a ground redundancy management switch, and the ground redundancy management switch is connected with a ground Ethernet;

the first vehicle-mounted directional antenna and the first ground directional antenna are arranged oppositely, a plane center perpendicular line of the first vehicle-mounted directional antenna and a plane center perpendicular line of the first ground directional antenna are superposed with a virtual reference line, and the first vehicle-mounted directional antenna, the first ground directional antenna and wireless access points connected with the first vehicle-mounted directional antenna and the first ground directional antenna form a first wireless communication channel for independent communication;

the second vehicle-mounted directional antenna and the second ground directional antenna are arranged oppositely, the plane center perpendicular line of the second vehicle-mounted directional antenna and the plane center perpendicular line of the second ground directional antenna are coincident with the virtual reference line, and the second vehicle-mounted directional antenna, the second ground directional antenna and the wireless access points connected with the second vehicle-mounted directional antenna form a second wireless communication channel for independent communication.

Further, the vehicle-mounted redundancy management switch is a redundant ring network protocol vehicle-mounted redundancy management switch or a zero-packet-loss protocol vehicle-mounted redundancy management switch, and the ground redundancy management switch is a redundant ring network protocol ground redundancy management switch or a zero-packet-loss protocol ground redundancy management switch.

Furthermore, the first vehicle-mounted directional antenna and the second vehicle-mounted directional antenna respectively communicate with the corresponding first ground directional antenna and the second ground directional antenna by adopting isolated frequency bands, so that two wireless communication channels for independent communication are formed.

The utility model has the advantages that:

the use of directional antennas to achieve wireless communication between the vehicle system and the ground system is the simplest and straightforward approach for all possible wireless applications. The directional wireless communication system has the advantages of minimum participation equipment, lowest cost and most convenient maintenance.

The transmission distance of the spherical antenna is limited, and the requirement of full-stroke electromagnetic coverage cannot be obviously met by adopting a pair of spherical antennas. The roaming method requires a plurality of wireless ground stations to be arranged along the traveling path of the stacker-reclaimer. The outdoor environment can not be laid, and the spherical antenna can be arranged on the top of a factory building under the condition that the factory building is covered. However, the spherical antenna ground stations arranged under the structure need optical fiber interconnection, and high-altitude operation is difficult. Meanwhile, the spherical antenna emits electromagnetic waves outward in a spherical surface. For any antenna, the strength of signal reception substantially determines the rate of data transmission. With the same feeder length, the energy received by the antennas through the cable feeders is equal. The directional antenna concentrates the received energy on a point to transmit, while the spherical antenna transmits the energy onto the sphere. Obviously, in the effective transmission range of the spherical antenna. At the same interval, the signal strength received by the directional antenna is much higher than that received by the ball-type antenna. Even after the distance of the directional antenna has increased by several hundred meters, the received signal strength is still higher than that of the spherical antenna in its effective transmission range. This can be derived from the measurements: the data transmission rate of the directional antenna does not significantly decrease with increasing distance.

The electromagnetic beam emitted by a directional antenna can be thought of approximately as emanating from the center of the antenna plane perpendicular to the plane of the antenna. Due to the exit angle (20 ° or less) of the emitted beam, the antenna cannot be used without careful adjustment, but certainly cannot communicate with the maximum output power. Because the electromagnetic wave is energy-unattenuated only in the direction of the perpendicular to the center of the plane. The purpose of adjusting the center vertical lines of the two antenna planes which are oppositely arranged to coincide with the virtual reference line is to transmit data by pursuing the maximum output power. However, this is only an ideal situation, and in the actual situation, the rails are not completely straight, the ground cannot be completely horizontal, all the alignment facilities related to the rails can have adjustment deviation, and the stacker-reclaimer has large vibration when in operation. Although there are various positional deviation factors, the vertical lines of the two antennas are deviations around a virtual reference line, and the average position of the two antennas is still the reference line, so that the virtual reference line can be considered as the maximum energy transmission line of the wireless antenna.

By using the scheme, the data transmission rate obtained by the whole-course test of the operation of the stacker-reclaimer is high enough, and the data transmission rate is not obviously reduced due to the extension of the distance. Taking a larger distance test result as an example, at a distance of 800m and above, the rate of transmitting the UDP data packet by the actually measured data transmission layer is about 100 Mbps. The scheme can ensure that the wireless communication system communicates with the maximum wireless output power in the whole running range (0-1000 m) of the stacker-reclaimer.

Failure of a wireless communication link is typically due to misalignment of the antennas. For such failures, the standard procedure designed by the present invention can quickly and quickly re-tune the antenna. Moreover, by utilizing the standard flow, maintenance personnel can also frequently inspect the alignment condition of the antenna to find problems in advance, thereby avoiding communication interruption in production in advance.

The redundant line structure, especially adopting a zero packet loss protocol, can ensure reliable transmission of data. This is crucial for control systems that require fast and reliable data transmission.

On the other hand, the redundant transmission channels can communicate through the other channel when one channel completely fails, so that the situation that the stacker-reclaimer causes communication interruption due to the failure of a single communication line and has a great influence on production and operation is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 shows a technical schematic diagram of a redundant ring network;

fig. 2 shows a schematic diagram of transmission data of a zero-packet loss protocol;

FIG. 3 shows a schematic diagram of a dual radio channel redundancy architecture;

FIG. 4 is a schematic diagram of a wireless communication system of the stacker-reclaimer;

fig. 5 shows a single wireless communication structure.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terms "first," "second," and the like in the description and in the claims of the present disclosure are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

A plurality, including two or more.

And/or, it should be understood that, for the term "and/or" as used in this disclosure, it is merely one type of association that describes an associated object, meaning that three types of relationships may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone.

Several key conditions whether the wireless communication system can be applied to the stacker-reclaimer are:

1, the stacker-reclaimer moves along a straight rail;

2 the stacker-reclaimer has a proper installation position at about 3m height of the rail, the ground and the vehicle-mounted antenna are not blocked, and a plurality of operating devices exist in the middle position of the two rails and are not suitable for the installation of the antenna;

3 a flat free ground without pipes or other equipment can be found right below the antenna, facilitating the production of a reference platform (length about 3m) for use in the alignment of vehicle and ground antennas;

the stacker-reclaimer equipment is divided into a plurality of forms, the equipment names are different, and the stacker-reclaimer mainly comprises a cantilever bucket-wheel stacker-reclaimer, a bridge bucket-wheel stacker-reclaimer and a gate bucket-wheel stacker-reclaimer; a gate type scraper reclaimer and a roller blending reclaimer; and a rotary stacker, a blending stacker and a rocker arm stacker. The above-mentioned many forms of stacker-reclaimers all satisfy the above-mentioned key conditions, so the wireless communication system according to the present application is applicable to all the above stacker-reclaimer devices.

Examples

Wireless communication equipment foundation

The wireless Ethernet device is a communication device based on wireless Ethernet transmission protocol IEEE 802.11. Through the development of years, the IEEE802.11 protocol is gradually enhanced and improved, and the IEEE802.11n protocol is developed. Ieee802.11n newly adds a standard for MIMO. The combination of MIMO (multiple input multiple output) technology and OFDM (orthogonal frequency division multiplexing) technology greatly improves the transmission rate and transmission quality of the wireless Ethernet.

The invention should adopt the wireless Ethernet equipment designed based on the IEEE802.11n technology, and requires the wireless antenna adopting the MIMO technology. The system combining the wireless AP supporting the MIMO technology and the MIMO wireless antenna has higher communication rate, and the theoretical data communication rate of the system at least reaches more than 300 Mbps.

The choice of antenna is crucial to the invention. The invention adopts the directional panel antenna, and the wireless communication requirement of the whole operation process of the stacker-reclaimer can be met by simply installing a pair of directional antennas on the stacker-reclaimer and the ground.

The sending angle of the electromagnetic wave of the directional antenna is very small, the emergence angles of half power wave beams (HPBW) are different according to different selected products, and the emergence angle of the HPBW of the directional antenna adopted by the invention is about 15-20 degrees. Smaller exit angles can also be accommodated.

Two-way wireless communication channel

The network structure of the industrial Ethernet has a basic redundancy mode, namely, a redundancy ring network technology. Around the redundant RING network structure, each manufacturer has its own redundant protocol and name is different, for example, HIPPER-RING protocol, and international standard protocol, i.e. MRP protocol. However, the principle is the same regardless of the name, i.e. a segment of the network connection in a ring network is actually not carrying data, but is a backup path. When the control station in the ring network finds that a section of line in the ring is disconnected, the channel is started to transmit data, so that all switches on the ring network are ensured to be connected, as shown in fig. 1.

Another form of network redundancy is where data is transmitted on two channels simultaneously and the receiving end switch decides which line the data comes from.

This ensures that at least one line of data can reach the receiving switch at any time unless both lines of data are lost at the same time. This is the so-called "zero packet loss protocol", as shown in fig. 2.

The wireless communication system of the stacker-reclaimer is greatly influenced by external factors: the machine body vibration generated by the stacker-reclaimer during continuous movement or operation, the influence of natural environments such as wind, rain, thunder and lightning and the influence of dust generated during material loading and unloading. These factors may affect the transmission and reception of the electromagnetic radio waves, resulting in the loss of data packets. For a system with application software having a data retransmission function or a system adopting a communication protocol with a connection communication mode, the data loss at least causes the delay of the response time of the system; if the system without the functions is not provided with the functions, the safe operation of some important systems is seriously influenced.

Both of the above redundancy techniques may be selectively employed in the present system. Although they have the same network structure as shown in fig. 3, there is a large difference in application between them. The redundancy ring structure considers that when one wireless communication line fails, the standby connection is started, namely, the communication is switched to another wireless communication line, and the switching time is different from 50ms to 500 ms. It is suitable for handling the situation where one wireless line is completely out of order. However, it does not improve the phenomenon of instant data packet loss, and the intermittent situation of the wireless communication line may cause the actual loop of the network due to frequent switching, thereby causing network paralysis.

The application of the zero packet loss protocol can ensure the stability of data communication greatly. However, since the implementation of the zero-drop protocol requires the internal software of the switch to process the received data packet, it is at the expense of a part of the data communication rate. The solution is to select an ethernet switch with a higher communication rate and using a hardware device to perform a zero-drop protocol function, for example, a zero-drop switch that processes gigabit port data.

Of course, the dual wireless channel structure may increase the cost of the device, and whether the single wireless channel or the dual wireless channel structure is adopted depends on the requirement of the system for transmitting data, and the user needs to balance the performance and price.

If the stability of data transmission is emphasized, a dual wireless communication line and a zero packet loss protocol are preferred. The dual wireless ethernet redundant channel is a main feature of the present invention.

Directional plate antenna

It has been mentioned in the foregoing that the use of directional antennas is a key component of the present invention.

The directional panel antenna should be installed at a position which is not blocked by an external object and is convenient to operate. The top plane of the first gantry of the stacker-reclaimer (about 3m from the ground) is a good mounting position. Correspondingly, a ground wireless station is arranged at the end of the rail opposite to the first portal frame. The directional panel antennas are installed at the same height. If no proper installation position exists, a stand column is required to be separately established for installing the ground wireless station.

A pair of directional antennas occupy the inside of the gantry adjacent one of the rails. When a redundant wireless channel scheme is selected, another pair of directional panel antennas needs to be installed on the inner side of the portal frame close to the other rail, and the two pairs of wireless antennas are required to adopt isolated frequency band communication.

The antenna on the stacker-reclaimer need not be mounted on the first gantry, but may be mounted elsewhere if the first gantry platform is too low (the wireless path is easily blocked by foreign objects). The main consideration is not so high that the operation is inconvenient and the influence of foreign objects is avoided. Generally 3m is suitable.

The ground antenna location should be mounted at least at the end of the rail. The conditions allow that an electrical pole can be set up in the right place. It is also possible to have walls with mounting.

The directional antenna has small emitting angle, the material piling and taking machine is also a mobile device, in order to ensure that the antenna is always aligned no matter where the material piling and taking machine moves, the solution is to select a certain parallel line of the center lines of the rail or two rails where the material piling and taking machine is located as a ground datum line, make a virtual vertical plane perpendicular to the horizontal plane through the datum line, and find a parallel line of the ground datum line in the virtual vertical plane as a virtual datum line. The antennas are adjusted so that the plane center perpendiculars of the two oppositely communicating directional antenna planes coincide with the virtual reference line, as shown in fig. 4.

The directional antenna is a square planar surface with dimensions of about 300 mm. The emitted electromagnetic beam is substantially perpendicular to the plane of the antenna and emerges from the center of the plane of the antenna according to the antenna parameters. In order to make the antenna adjustment have reference, the bottom edge of the plane of the antenna is required to be adjusted to be parallel to the ground horizontal plane, the plane of the antenna is perpendicular to the ground horizontal plane, the center lines of the ground and the plane of the vehicle-mounted antenna are at the same height, and the plane center perpendicular lines of the two oppositely arranged planes of the antenna are superposed with the virtual reference line. These requirements are met to ensure that the communication between the directional antennas is carried out with maximum radiation power, since the central radiated power of the antenna beam is maximum and without any attenuation, depending on the antenna specifications. The center of the beam can be assumed to be the vertical center of the antenna plane.

Network formation

A directional antenna is arranged on a stacker-reclaimer vehicle, another directional antenna is arranged at the end point of a corresponding rail, and a pair of wireless communication channels are formed between the two directional antennas. The structure of the single wireless communication system is shown in fig. 5, and the structure of the dual wireless channel system is shown in fig. 3.

There are generally no very suitable walls on the ground for installing the wireless antennas. Thus, the wireless antenna is fixed to the ground by erecting a round bar near the end of the rail. Since the round bar is not only used for fixing the antenna but also needs to fix the wireless AP device, the photoelectric conversion device, and the power supply device thereon, the round bar is called an electric bar. It is also possible that the radio antenna is mounted on a wall, as conditions permit. But the antenna alignment scheme is the same.

The vehicle-mounted wireless antenna is connected to a wireless AP, and the wireless AP is connected to a vehicle-mounted wired network system.

The ground wireless antenna is also connected to the ground network through the wireless AP and the photoelectric converter through the optical cable.

The antenna on the stacker-reclaimer is usually arranged on the first gantry, close to one side of the rail. The reason for not selecting the antenna to be installed above the rail is that the edge profile of the rail is blurred, which easily causes deviation of the reference line. While there is no plane at the rail for placement of alignment instruments.

If there is a higher demand for data stability and the cost can be borne, a dual wireless redundancy structure is employed. A pair of directional antennas is also required to be positioned on the same gantry in the direction close to the rail on the other side. The antennas are placed apart in order to avoid radio interference between the two lines.

Two wireless access points (i.e., AP devices) on the stacker-reclaimer and two wireless AP devices on the ground need to be connected to a switch supporting the zero-packet-loss protocol or a switch supporting the ring network protocol, respectively. The connection between the wireless AP and the switch supporting the zero packet loss protocol may be in the form of an external connection. And the wireless AP equipment which adopts an internal connection mode and supports a zero packet loss protocol can also be adopted. The device accepts data from two independent wireless lines and performs the function of performing a zero packet loss protocol.

The switches supporting the zero packet loss protocol on the ground and the vehicle are respectively connected to the wired networks on the ground and the vehicle through wired cables or optical cables.

After the vehicle-mounted directional antenna and the ground directional antenna are started, the wireless communication of the stacker-reclaimer can be realized. The antenna is adjusted during debugging, so that the plane center perpendicular line of the vehicle-mounted directional antenna and the plane center perpendicular line of the correspondingly arranged ground directional antenna coincide with the virtual reference line, and the plane center perpendicular line of the vehicle-mounted directional antenna and the plane center perpendicular line of the correspondingly arranged ground directional antenna can be always coincided in the advancing process of the stacker-reclaimer, and therefore communication with the maximum wireless output power is achieved.

According to the characteristic of linear movement of the stacker-reclaimer, the responsibility of transmitting data of the stacker-reclaimer and ground equipment is completely assumed within the movement range (0-1000 m) of the stacker-reclaimer by adopting a basic mode of wireless point-to-point communication of a pair of flat plate type directional antennas.

The redundant wireless communication system is applied to the stacker-reclaimer wireless communication system for the first time. The redundant structure of two pairs of antenna communication lines for independent communication is adopted to ensure that at least one of the two wireless communication lines is in a communication state, and a zero packet loss protocol is adopted to ensure that data can reach the other side without packet loss under a certain communication frequency.

Claims (10)

1. A stacker-reclaimer wireless communication system, the wireless communication system comprising:

the vehicle-mounted directional antenna is arranged on the stacker-reclaimer through a vehicle-mounted antenna bracket, is connected with a vehicle-mounted wireless access point, and is accessed into a vehicle-mounted Ethernet through a wired cable or an optical cable;

the ground directional antenna is arranged at the end point of the operation track of the stacker-reclaimer through a ground antenna bracket, is connected with a ground wireless access point and is accessed into a ground Ethernet through wired connection,

wherein the vehicle-mounted directional antenna and the ground directional antenna are arranged oppositely, and the plane center perpendicular line of the vehicle-mounted directional antenna and the plane center perpendicular line of the ground directional antenna arranged correspondingly are superposed with the virtual reference line,

the vehicle-mounted directional antenna and the ground directional antenna are rectangular planes with the same size, and the central point of each rectangular plane is an antenna signal emitting point.

2. The stacker-reclaimer wireless communication system of claim 1, wherein the vehicle-mounted antenna mount and the ground antenna mount are of the same structure, comprising:

the round rod component is used for fixing the vehicle-mounted directional antenna and the ground directional antenna;

the round rod part is fixed on a first side surface of the square metal part, and a second side surface opposite to the first side surface is used for being fixed on a stacker-reclaimer or at the end point of a track;

the round bar member is fixed on the first side surface of the square metal member by an upper connecting member and a lower connecting member,

the perpendicular line of the round bar component is parallel to one of the two plane central lines of the vehicle-mounted directional antenna and the ground directional antenna,

wherein the round bar member is capable of performing position correction by adjusting the upper connecting member and the lower connecting member.

3. The stacker-reclaimer wireless communication system of claim 2, wherein the upper connecting member comprises an upper bolt and a lower screw, and the lower connecting member comprises a lower screw and a lower bolt.

4. The stacker-reclaimer wireless communication system of claim 3, wherein the first side of the square metal member is provided with a round hole at the lower bolt and an arc-shaped elongated hole at the upper bolt, and the upper bolt is capable of sliding in the arc-shaped elongated hole.

5. The stacker-reclaimer wireless communication system of claim 4, wherein an elastic member is provided between the circular hole and the arc-shaped elongated hole, and the circular rod member is subjected to position correction by adjusting the position of the upper bolt in the arc-shaped elongated hole and by adjusting the distance between the upper screw and the lower screw with respect to the first side surface.

6. The stacker-reclaimer wireless communication system of claim 1, wherein the vehicle-mounted directional antenna is disposed on the first mast of the stacker-reclaimer through the vehicle-mounted antenna bracket or can ensure a position where the vehicle-mounted directional antenna and the ground directional antenna are not blocked and are not shielded.

7. The wireless communication system of the stacker-reclaimer of claim 1, wherein the vehicle-mounted directional panel antenna and the ground directional panel antenna are disposed 2.5m to 3.5 m from the ground.

8. The stacker-reclaimer wireless communication system of claim 1, wherein the ground directional antenna is mounted on an electric pole or on a wall at the end of the stacker-reclaimer orbit through a ground antenna bracket.

9. A stacker-reclaimer wireless communication system, the wireless communication system comprising:

the system comprises a first vehicle-mounted directional antenna and a second vehicle-mounted directional antenna, wherein the first vehicle-mounted directional antenna and the second vehicle-mounted directional antenna are respectively arranged on a stacker-reclaimer through vehicle-mounted antenna supports and are respectively connected with a vehicle-mounted wireless access point, the vehicle-mounted wireless access point is connected with a vehicle-mounted redundancy management switch, and the vehicle-mounted redundancy management switch is connected with a vehicle-mounted Ethernet;

the system comprises a first ground directional antenna and a second ground directional antenna, wherein the first ground directional antenna and the second ground directional antenna are respectively arranged at the end point of a running track of the stacker-reclaimer through a ground antenna support and are respectively connected with a ground wireless access point, the ground wireless access point is connected with a ground redundancy management switch, and the ground redundancy management switch is connected with a ground Ethernet;

the first vehicle-mounted directional antenna and the first ground directional antenna are arranged oppositely, a plane center perpendicular line of the first vehicle-mounted directional antenna and a plane center perpendicular line of the first ground directional antenna are superposed with a virtual reference line, and the first vehicle-mounted directional antenna, the first ground directional antenna and wireless access points connected with the first vehicle-mounted directional antenna and the first ground directional antenna form a first wireless communication channel for independent communication;

the second vehicle-mounted directional antenna and the second ground directional antenna are arranged oppositely, the plane center perpendicular line of the second vehicle-mounted directional antenna and the plane center perpendicular line of the second ground directional antenna are coincident with the virtual reference line, and the second vehicle-mounted directional antenna, the second ground directional antenna and the wireless access points connected with the second vehicle-mounted directional antenna form a second wireless communication channel for independent communication.

10. The stacker-reclaimer wireless communication system of claim 9, wherein the vehicular redundancy management switch is a redundant ring network protocol vehicular redundancy management switch or a zero-packet-loss protocol vehicular redundancy management switch, and the ground redundancy management switch is a redundant ring network protocol ground redundancy management switch or a zero-packet-loss protocol ground redundancy management switch.

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