CN106101263B - Container scanning detection communication method and system - Google Patents
Container scanning detection communication method and system Download PDFInfo
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- CN106101263B CN106101263B CN201610580961.3A CN201610580961A CN106101263B CN 106101263 B CN106101263 B CN 106101263B CN 201610580961 A CN201610580961 A CN 201610580961A CN 106101263 B CN106101263 B CN 106101263B
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- 238000004891 communication Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 title claims description 28
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 230000001133 acceleration Effects 0.000 claims description 7
- 230000005856 abnormality Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 6
- 238000007689 inspection Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
Abstract
The invention discloses a method and a system for detecting communication based on container scanning, wherein the method comprises the following steps: the scanning device establishes wireless network connection with the control device through at least one wireless access point; the scanning device scans the container according to the control signal sent by the control device through the wireless network, and sends the scanning result to the control device through the wireless network. The system comprises: the scanning device establishes wireless network connection with the control device through at least one wireless access point; the scanning equipment scans the container according to the control signal sent by the control equipment through the wireless network, and sends the scanning result to the control equipment through the wireless network, so that the risks of shutdown and out of control caused by network cable breakage and poor contact are avoided, and the cost of cable laying, cable installation and the like is saved.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a container scanning detection communication method and system.
Background
At present, large container vehicle inspection equipment widely uses Ethernet communication to realize control and image signal transmission functions. Since such container inspection equipment is not fixed at a fixed scanning site and needs to be moved cyclically, a sliding wire or a drag chain is currently used to implement a wired ethernet communication function with a control layer.
When the sliding wire is used for Ethernet communication, the defects of poor sliding wire contact, poor signal transmission quality, high line laying cost, high difficulty in laying technology and the like exist. When the drag chain is used for Ethernet communication, a special flexible cable with higher cost is needed to be selected, and the drag chain has the advantages of complex structure, complex laying, poor environmental adaptability, cable breakage and the like in long-term use and is not easy to maintain.
Disclosure of Invention
The invention provides a communication method and a communication system based on container scanning detection, which are used for avoiding the risk of shutdown and out of control caused by network cable breakage and poor contact and saving the cost of cable laying, installation and the like.
In a first aspect, an embodiment of the present invention provides a container scanning detection communication method, including:
the scanning device establishes wireless network connection with the control device through at least one wireless access point;
the scanning device scans the container according to the control signal sent by the control device through the wireless network, and sends the scanning result to the control device through the wireless network.
In a second aspect, an embodiment of the present invention further provides a container scanning detection communication system, including:
the scanning device establishes wireless network connection with the control device through at least one wireless access point; the scanning device scans the container according to the control signal sent by the control device through the wireless network, and sends the scanning result to the control device through the wireless network.
According to the invention, the wireless access point is arranged to establish wireless network connection between the scanning equipment and the control equipment, so that the wired Ethernet is replaced, and the control information of the scanning equipment and the scanning result acquired by the scanning equipment are transmitted through the wireless network, thereby realizing stable transmission of the control signal and the scanning result, reducing the cable laying difficulty, lowering the cost and the like.
Drawings
Fig. 1 is a flowchart of a method for detecting communication based on container scanning according to a first embodiment of the present invention;
fig. 2 is a network topology structure diagram based on a container scanning detection communication method according to a second embodiment of the present invention;
fig. 3 is a network topology structure diagram of another method for detecting communication based on container scanning according to the second embodiment of the present invention;
fig. 4 is a network topology structure diagram of another method for detecting communication based on container scanning according to the second embodiment of the present invention;
FIG. 5 is a schematic diagram of the wireless network signal strength recorded by the container scanning detection apparatus employing the network topology shown in FIG. 3 when operating in a cyclic manner in a scanning field;
fig. 6 is a schematic diagram of a scan field test of a container scanning inspection apparatus using the network topology shown in fig. 3.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a communication method based on container scanning detection according to a first embodiment of the present invention, where the embodiment is applicable to container inspection, and specifically includes the following steps:
s110, the scanning device establishes wireless network connection with the control device through at least one wireless access point.
The scanning device can be, for example, a scanning vehicle, or a device comprising a detection device and an acceleration device, and can be used for checking containers without opening the container. Specifically, the method can be used for carrying out rapid scanning and radioactivity monitoring according to actual application scenes, and the identification of organic matters and/or inorganic matters can be selected. In the step, the number of the wireless access points with different numbers can be selected according to the change of the actual application scene, so that the whole coverage of the whole scanning field by the wireless network signals is realized. The location of the wireless access point may also be set differently according to the specific structure of the container scanning detection system, for example, may be set in a scanning site, or may be set on a scanning device, etc.
And S120, the scanning equipment scans the container according to the control signal sent by the control equipment through the wireless network, and sends the scanning result to the control equipment through the wireless network.
After the wireless network connection between the scanning device and the control device is established through step S110, the control device may send control information to the scanning device through the wireless network, the scanning device scans the container according to the received control information, obtains a scanning result, and then sends the scanning result to the control device.
According to the embodiment of the invention, the wireless access point is arranged, the wireless network connection between the scanning equipment and the control equipment is established to replace the wired Ethernet, and the control information of the scanning equipment and the scanning result acquired by the scanning equipment are transmitted through the wireless network, so that the purposes of stable transmission of the control signal and the scanning result, difficulty in cable laying, cost reduction and the like are realized.
Preferably, the network standard of the wireless network connection is IEEE802.11, and a 2.4GHz or 5GHz industrial wireless network is used.
Example two
Fig. 2 is a network topology diagram based on a container scanning detection communication method according to a second embodiment of the present invention, as shown in fig. 2, the control device a includes a control device A1, a receiving device A2, a switch A3, and a wireless client A4; the control device A1 and the receiving device A2 are respectively connected and communicated with the wireless client A4 through a switch A3; the wireless client A4 is used for establishing wireless network connection with the wireless access point B1; the control device A1 is used for sending a control signal to the scanning equipment B through the wireless network; the receiving device A2 is used for receiving the scanning result sent by the scanning equipment B through the wireless network; the scanning device B comprises a wireless access point B1, a switch B2, a detection device B3 and an acceleration device B4, wherein the detection device B3 and the acceleration device B4 are in connection communication with the wireless access point B1 through the switch B2. The network topology is suitable for combined mobile container scanning and detecting equipment.
Fig. 3 is a network topology structure diagram based on a container scanning detection communication method according to a second embodiment of the present invention, as shown in fig. 3, in a scan field, at least one wireless access point is arranged according to a scan field structure, and is fixedly installed on a wall of the scan field, so that a wireless network signal can cover the entire scan field. A wireless client is installed on each device scanning apparatus within the scanning venue. By arranging wireless access points and wireless clients, wired ethernet is replaced. An operator controls the control device in the control room, sends control information such as scanning and walking of the scanning device through a wireless network, and can also receive a scanning result (such as a scanning image) sent by the scanning device through the wireless network. Fig. 3 illustrates an exemplary configuration of 2 wireless access points, wireless access points C1 and C2, respectively); the control device D comprises a control device D1, a receiving device D2 and a switch D3; the control device D1 and the receiving device D2 are respectively connected and communicated with the wireless access points C1 and C2 through the switch D3; the control device D1 is configured to send a control signal to the scanning apparatus E through the wireless network; the receiving device D2 is configured to receive, via the wireless network, a scanning result sent by the scanning device E; the scanning equipment E comprises a wireless client E1 and a scanning vehicle E2; the wireless client E1 is used for establishing wireless network connection with the wireless access points C1 and C2; the scanning vehicle E communicates with wireless access points C1 and C2.
On the basis of the above technical solution, optionally, in the network topology structure diagrams shown in fig. 2 and fig. 3, the scanning device further includes a first programmable logic controller, where the first programmable logic controller is configured with a GSD file for describing a general site of a wireless access point and a wireless client, and is configured to hang the wireless access point and the wireless client on a bus as a remote substation, acquire a wireless network connection state of the wireless access point and the wireless client in real time, and control the scanning device to stop scanning a container when the wireless network connection state is abnormal; the network connection state abnormality comprises disconnection of the wireless network connection and/or the signal strength of the wireless network connection is smaller than a preset value. And the control device outputs alarm information when the heartbeat information of the first programmable logic controller is not detected.
Specifically, in the hardware configuration of the first programmable logic controller, a general site description GSD file of the wireless access point and the wireless client is added, the wireless access point and the wireless client are hung on a bus as remote substations, a bus fault diagnosis block is invoked, a wireless network connection state received in the hardware configuration is output in real time, and whether the scanning device is stopped is controlled according to the detected wireless network connection state. The control device monitors the heartbeat information of the first programmable logic controller in real time, when the control device cannot detect the heartbeat information of the first programmable logic controller, the wireless network connection is abnormal, the wireless network connection disconnection is possibly caused, and/or the wireless network connection signal strength is smaller than a preset value, at the moment, the control device outputs alarm information to prompt a user that the wireless network connection is abnormal.
When the wireless network connection is disconnected and/or the wireless network connection signal strength is smaller than a preset value, the control equipment cannot transmit control information to the scanning equipment through the wireless network, and the scanning equipment cannot transmit a scanning structure to the control equipment, so that the scanning equipment is controlled to stop scanning the container and switch into a standby mode by monitoring the wireless network connection state and controlling the scanning equipment to stop scanning the container when the wireless network connection state is abnormal.
In addition to the above implementation of controlling the operation of the scanning device when the wireless network is abnormal by adding the GSD file of the general site description of the wireless access point and the wireless client in the hardware configuration of the first programmable logic controller, the present invention further provides a further implementation method for controlling the operation of the scanning device when the wireless network is abnormal.
Specifically, the scanning device comprises a first programmable logic controller, and the wireless client also comprises a remote input/output module; the first programmable logic controller monitors whether the remote input/output module is disconnected, and controls the scanning equipment to stop scanning the container when the remote input/output module is disconnected; and the control device outputs alarm information when the heartbeat information of the first programmable logic controller is not detected.
Because the first programmable logic controller can immediately detect that the remote input/output module is disconnected when the wireless network connection between the wireless access point and the wireless client is disconnected or the wireless network connection signal strength is smaller than a preset value, whether the wireless network connection is abnormal can be judged by monitoring whether the remote input/output module is disconnected.
Fig. 4 is a network topology structure diagram of still another communication method based on container scanning detection according to the second embodiment of the present invention, as shown in fig. 4, where the control device is a mobile terminal F; the scanning equipment G comprises a wireless access point G1, a switch G2, a scanning vehicle G3 and a receiving device G4; the wireless access point G1, the switch G2 and the receiving device G4 are positioned in the scanning vehicle G3, and the scanning vehicle G3 and the receiving device G4 are respectively connected and communicated with the wireless access point G1 through the switch G2; at least one antenna G5 and at least one antenna G6 are respectively arranged inside and outside the scanning vehicle, and the mobile terminal F establishes wireless network connection with the wireless access point G1 through the antenna G5 or the antenna G6. The network topology structure is suitable for vehicle-mounted container scanning and detecting equipment. Alternatively, the antenna may be an omni-directional antenna. Preferably, the mobile terminal F is provided with a touch screen, and the touch screen can be used for realizing the action control and state monitoring functions of the vehicle-mounted container scanning detection device, so that the cancellation of the electric panel outside the vehicle body is possible.
Optionally, in the network topology structure shown in fig. 4, the scanning device further includes a first programmable logic controller, where the first programmable logic controller is configured with a general site description GSD file of a wireless access point and a mobile terminal, and is configured to hang the wireless access point and the mobile terminal on a bus as a remote substation, acquire a wireless network connection state of the wireless access point and the mobile terminal in real time, and control the scanning device to stop scanning a container when the wireless network connection state is abnormal; wherein the network connection state abnormality comprises disconnection of the wireless network connection and/or signal strength of the wireless network connection is smaller than a preset value; and when the mobile terminal does not detect the heartbeat information of the first programmable logic controller, outputting alarm information to prompt the user that the wireless network connection is abnormal. When the mobile terminal is provided with the touch screen, fault alarm display, system scram functions and the like can be realized, fault alarm information can be displayed on the touch screen, and specific position and state information of faults are displayed. The operator carrier mobile terminal checks the fault occurrence point and confirms the fault point state at any time.
Optionally, the wireless access point may also be a wireless router. The wireless clients described above may also be replaced with wireless routers.
On the basis of the embodiment, the wireless client supports fast roaming, and the situation that the wireless client is disconnected when the wireless client is mutually switched among a plurality of wireless access points is guaranteed.
According to the method provided by the embodiment of the invention, the transmission speed of the wireless network can reach 450Mbit/s, so that an operator can send control information to the scanning equipment through the wireless network, and the network communication quality is not reduced when the scanning result is transmitted.
Fig. 5 is a schematic diagram of wireless network signal strength recorded by the container scanning detection device using the network topology shown in fig. 3 when the container scanning detection device is operated in a circulating manner in a scanning field. As shown in fig. 5, the wireless network signal of the scan field is basically above-69 dBm, and in the areas with poor signals (the areas a1, a2 and a3 in fig. 5), the wireless network signal can be quickly and automatically switched to the wireless access point with stronger signal, so that the communication is ensured not to be disconnected. The handover of the wireless access point recorded using the test software is shown in table 1:
TABLE 1
Referring to table 1, the signal sampling period of the wireless client is 200ms, and when fast roaming occurs, the wireless client can complete switching between two wireless access points within 1 sampling period, and it can be seen from the change of the physical address and the channel of the wireless access points in table 1 that switching is performed. When fast roaming is not used, the switching speed of the wireless client between two wireless access points is around 5 s. After fast roaming is initiated, the speed of handoff between two wireless access points can be controlled to within 500 ms.
Fig. 6 is a schematic diagram of a scan field test of a container scanning inspection apparatus using the network topology shown in fig. 3. Referring to fig. 6, the scan field is divided into 6 points, denoted b1-b6, and table 2 records and analyzes the response time of the scanning device passing through the 6 points, so that the average response time is 6-8 ms, and the transmission use requirements of the device image and control signals can be satisfied.
| Point b1 | Point b2 | Point b3 | Point b4 | Point b5 | Point b6 | |
| Number of transmission packets | 200 | 205 | 200 | 210 | 203 | 204 |
| Number of received packets | 200 | 205 | 200 | 210 | 202 | 201 |
| Packet loss number | 0 | 0 | 0 | 0 | 1 | 3 |
| Packet loss rate | 0 | 0 | 0 | 0 | 0 | 1％ |
| Minimum response time | 4 | 3 | 3 | 4 | 3 | 3 |
| Maximum response time | 22 | 10 | 13 | 31 | 11 | 40 |
| Average response time | 8 | 7 | 6 | 8 | 7 | 8 |
TABLE 2
Example III
An embodiment of the present invention provides a container scanning detection communication system, which includes: the scanning device establishes wireless network connection with the control device through at least one wireless access point; the scanning device scans the container according to the control signal sent by the control device through the wireless network, and sends the scanning result to the control device through the wireless network.
In this embodiment, the network throughput of the system is tested, and table 3 provides a test result of the network throughput of the communication system based on container scanning detection according to the third embodiment of the present invention, referring to table 3, it can be seen that the total throughput when two data packets of 16384 and 32768 are transmitted is about 25Mbps, and the throughput of the wireless system is not increased up, which indicates that the throughput of the wireless system is about 25 Mbps.
TABLE 3 Table 3
According to the embodiment of the invention, the wireless access point is arranged, the wireless network connection between the scanning equipment and the control equipment is established to replace the wired Ethernet, and the control information of the scanning equipment and the scanning result acquired by the scanning equipment are transmitted through the wireless network, so that the purposes of stable transmission of the control signal and the scanning result, difficulty in cable laying, cost reduction and the like are realized.
Optionally, the wireless access point may also be a wireless router.
The control device may also be a mobile terminal, which may also be provided with a touch screen.
Preferably, the network standard of the wireless network connection is IEEE802.11, and a 2.4GHz or 5GHz industrial wireless network is used.
The system according to the embodiment of the invention can execute the method according to each embodiment, and has the same beneficial effects as the method.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. A method of container-based scanning detection communication, comprising:
the scanning device establishes wireless network connection with the control device through the wireless access point;
the scanning equipment comprises the wireless access point, a second switch, a detection device and an acceleration device, wherein the detection device and the acceleration device are respectively connected and communicated with the wireless access point through the second switch; or the scanning equipment comprises the wireless access point, a second switch, a scanning vehicle and a second receiving device;
the scanning equipment scans the container according to the control signal sent by the control equipment through the wireless network, and sends the scanning result to the control equipment through the wireless network;
the control equipment comprises a control device, a first receiving device, a first switch and a wireless client; the control device and the first receiving device are respectively connected and communicated with the wireless client through the first switch; the wireless client is used for establishing wireless network connection with the wireless access point; the control device is used for sending a control signal to the scanning equipment through the wireless network; the first receiving device is used for receiving a scanning result sent by the scanning equipment through the wireless network; the wireless client supports fast roaming;
the scanning device further comprises a first programmable logic controller, wherein the first programmable logic controller is configured with a general site description GSD file of the wireless access point and the wireless client, and is used for hanging the wireless access point and the wireless client on a bus as a remote substation, acquiring the wireless network connection state of the wireless access point and the wireless client in real time, and controlling the scanning device to stop scanning a container when the wireless network connection state is abnormal, and entering a standby mode; wherein the network connection state abnormality comprises disconnection of the wireless network connection and/or signal strength of the wireless network connection is smaller than a preset value;
the control device monitors the heartbeat information of the first programmable logic controller in real time, and outputs alarm information when the heartbeat information of the first programmable logic controller is not detected.
2. The method according to claim 1, wherein the control device is a mobile terminal; the wireless access point, the second switch and the second receiving device are positioned in a scanning vehicle, and the scanning vehicle and the second receiving device are respectively connected and communicated with the wireless access point through the second switch; at least one antenna is arranged inside and outside the scanning vehicle respectively, and the mobile terminal establishes wireless network connection with the wireless access point through the antenna.
3. The method of claim 1, wherein the wireless client further comprises a remote input output module;
and the first programmable logic controller monitors whether the remote input/output module is disconnected, and controls the scanning equipment to stop scanning the container when the remote input/output module is disconnected.
4. The method of claim 3, wherein the first programmable logic controller is configured with a general site description GSD file of a wireless access point and a mobile terminal, for hanging the wireless access point and the mobile terminal as remote substations on a bus, acquiring wireless network connection states of the wireless access point and the mobile terminal in real time, and controlling the scanning device to stop scanning the container when the wireless network connection states are abnormal; wherein the network connection state abnormality comprises disconnection of the wireless network connection and/or signal strength of the wireless network connection is smaller than a preset value;
and when the mobile terminal does not detect the heartbeat information of the first programmable logic controller, outputting alarm information.
5. The method according to claim 1 or 2, wherein the wireless access point is a wireless router.
6. The method of claim 1 or 2, wherein the wireless client is a wireless router.
7. A container scan based detection communication system, adapted to the container scan based detection communication method of any one of claims 1 to 6, said system comprising:
the scanning device establishes wireless network connection with the control device through a wireless access point; the scanning device scans the container according to the control signal sent by the control device through the wireless network, and sends the scanning result to the control device through the wireless network;
the scanning equipment comprises a wireless access point, a second switch, a detection device and an acceleration device, wherein the detection device and the acceleration device are respectively connected and communicated with the wireless access point through the second switch; or the scanning equipment comprises the wireless access point, a second switch, a scanning vehicle and a second receiving device;
the scanning device further comprises the first programmable logic controller;
the control equipment comprises a control device, a first receiving device, a first switch and a wireless client; the control device and the first receiving device are respectively connected and communicated with the wireless client through the first switch; the wireless client is used for establishing wireless network connection with the wireless access point; the control device is used for sending a control signal to the scanning equipment through the wireless network; the first receiving device is used for receiving a scanning result sent by the scanning equipment through the wireless network; the wireless client supports fast roaming.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304038A (en) * | 1999-12-17 | 2001-07-18 | 清华大学 | Combined mobile container detection system |
| CN1490616A (en) * | 2002-10-16 | 2004-04-21 | �廪��ѧ | Movable vehicle container checking systems |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050251398A1 (en) * | 2004-05-04 | 2005-11-10 | Lockheed Martin Corporation | Threat scanning with pooled operators |
| GB0803643D0 (en) * | 2008-02-28 | 2008-04-02 | Rapiscan Security Products Inc | Mobile scanning systems |
| RO127852B1 (en) * | 2012-05-21 | 2019-03-29 | Mb Telecom Ltd Srl | Method and system for non-intrusive inspection of cargo type objects: motor vehicles, containers, train cars |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304038A (en) * | 1999-12-17 | 2001-07-18 | 清华大学 | Combined mobile container detection system |
| CN1490616A (en) * | 2002-10-16 | 2004-04-21 | �廪��ѧ | Movable vehicle container checking systems |
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