CN103490813A - Museum intelligent explanation system based on visible light and power line carrier communication - Google Patents
Museum intelligent explanation system based on visible light and power line carrier communication Download PDFInfo
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Abstract
The invention discloses a museum intelligent explanation system based on visible light and power carrier communication, which comprises a remote central control service platform, at least one power bridge, a plurality of power line carrier communication control modules, a plurality of user visible light information moving devices and a plurality of node terminal control modules which are respectively arranged at corresponding cultural relic exhibition information points, wherein the central control service platform is respectively connected with the power bridges through low-voltage power supply lines to realize data bidirectional transmission, each power bridge is respectively connected with the power line carrier communication control modules through the low-voltage power supply lines to realize data bidirectional transmission, and the power line carrier communication control modules are connected with the corresponding node terminal control modules to realize data bidirectional transmission. The invention can meet the LED illumination requirement of museums, can utilize the existing low-voltage power distribution circuit to carry out communication control, and can carry out transmission and control of voice explanation information in real time.
Description
Technical Field
The invention relates to a museum intelligent explanation system based on visible light and power line carrier communication, and belongs to the technical field of short-distance wireless communication and the technical field of power line carrier wired communication.
Background
At present, with the rapid advance of Internet of things (Internet of things) technology and industry, the dream of exchanging information anytime and anywhere is gradually being realized. The Internet of things depends on short-distance communication technologies such as Wireless Sensor Networks (WSNs), radio Frequency identification (rfid), and the like, and also does not leave infrastructures such as mobile communication networks and the Internet. Radio wave communication is adopted in short-distance communication, and although the method is widely applied, the method has the defects of harm to human bodies, easy mutual interference of communication equipment, limited frequency resources and the like.
In recent years, with the development of the manufacturing technology of a novel semiconductor high-efficiency high-brightness white Light Emitting Diode (LED), the luminous efficiency of the LED is gradually improved; under the promotion of national energy-saving and emission-reducing policies, the application field of the LED display screen gradually expands from the display field to the illumination field, and the LED display screen is developed at a high speed. Compared with the traditional lighting equipment, the white light LED belongs to a cold light source, has the advantages of low power consumption, long service life, small size, environmental protection and the like, and is considered as a fourth generation energy-saving and environment-friendly lighting product. White LEDs also have the advantage of very high response sensitivity, so that ultra-high speed short-range data communication can be performed using LEDs. Visible-Light Communication (VLC) is an emerging short-range Visible wireless Communication technology developed on the white Light LED technology.
In the low-voltage Power Line Carrier (PLC) communication, a low-voltage 220V ac mains Power supply Line which has been arranged originally is mainly used as a transmission channel for high-frequency communication signals for transmitting required data information such as remote control signals, voice information, image information and the like without newly establishing a new communication Line. Foreign countries such as the united states, japan, israel, and the like are conducting research and experiments on low voltage distribution network communications. And a Home network push group "Home Plug Power Line Alliance" using a low voltage Power Line as a transmission medium is jointly constructed by 13 companies such as 3COM, Intel, Cisco, japan panasonic, etc., which proposes a Home Plug plan aiming at pushing digital indoor communication using a Power Line as a transmission medium. In 2001, the family plug alliance in 6 months formulates an indoor power line communication specification HomePlug 1.0, and the theoretical rate is 14 Mbps; in 2005, in 12 months, Home Plug AV which is a data forwarding specification of HDTV, VoIP and the like is established, and the theoretical rate of the Home Plug AV is 200 Mbps; and starts to set Home Plug AV 2.0 from 3 months 2009 with a maximum rate of 600 Mbps. The 'HD-PLC Wavelet OFDM' standard established by the 'HD-PLC' alliance, which is established by companies such as Japan Panasonic, IO.DATA, AOPEN AMERICA, Advanced Communication Networks SA (CAN), OKI, village institute and the like, is adopted by the IEEE P1901 committee in 1 month of 2010 and becomes an international standard; in addition, the broadband PLC specification G.hn (50-700 Mbps) established by the 'Home Grid Forum' alliance built by 14 companies such as Intel, TI, Best Buy, Pan, Infenion, DS2 and the like passes through the Switzerland Indonawa in 6 months and 15 days 2010, and becomes an international standard. However, among the standards, G3 and PRIME are the two most well-known standards, while G3 is relatively focused on system robustness, has an effective data rate of 400Kbps for a bidirectional communication standard, allows a power line carrier communication signal to pass through a low-voltage transformer and be distributed to a medium-voltage line, reduces connection cost, and makes the power line carrier communication technology a hot spot in application today.
Chinese patent document 102868449a discloses a visible light communication-based underground wireless communication system, which only adopts a central control center + LED visible light communication controller + power line mode to construct an information communication network, and is applicable to data information communication in a short distance with a tunnel of a transformer line.
Patent documents similar to the above technical solutions include CN102624455A, CN102624451A, CN102752025A, CN202679357U, and the like.
The technical scheme has the disadvantages that in a complex low-voltage power line communication configuration scene with a long relative position distance, when a low-voltage power distribution line is used for communication, the relative distance is long or after passing through a power distribution device, an effective communication signal is always in communication failure or data loss in long-distance power line transmission, and the communication reliability of a system is influenced.
At present, museums basically explain cultural relics in a single-machine equipment mode, before the cultural relics are arranged, workers are required to number arrangement points, language input operation is strictly carried out on each single-machine equipment according to the numbers, once the explanation content of the cultural relics needs to be added and modified, each single-machine equipment needs to be renewed again, and a large amount of labor and time are invested; and when the user uses the device, the user can only input the corresponding number to listen to the pre-recorded cultural relic explanation. The cultural relic explanation mode brings great use inconvenience to users, and brings much trouble to the management and maintenance of the explanation equipment of the museum. In addition, a general museum is a multi-storey building, a 220V low-voltage distribution line is relatively complex, a power distribution line interface socket is relatively far away, and data communication may be unreliable if a direct power line carrier communication scheme is adopted. Based on the thought, the invention provides the intelligent explanation system for the museum, which integrates the visible light communication technology and the low-voltage power line carrier communication technology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an intelligent explanation system for a museum based on visible light and power carrier communication, which can meet the LED illumination requirements of the museum, can also utilize the existing low-voltage power distribution circuit to carry out communication control, and can carry out transmission and control of voice explanation information in real time, thereby avoiding that the explanation content can only be played in a one-way information transmission mode and cannot be independently played for each user in real time, and ensuring the continuity and independence of listening to the explanation content by each user.
The technical scheme adopted by the invention for solving the technical problems is as follows: an intelligent explanation system for museum based on visible light and power carrier communication comprises a remote central control service platform and at least one power bridge, the system comprises a plurality of power line carrier communication control modules, a plurality of user visible light information mobile devices and a plurality of node terminal control modules which are respectively arranged at corresponding cultural relic exhibition information points, wherein a central control service platform is respectively connected with power bridges through low-voltage power supply lines to realize data bidirectional transmission, each power bridge is respectively connected with the power line carrier communication control modules through the low-voltage power supply lines to realize data bidirectional transmission, the power line carrier communication control modules are connected with the corresponding node terminal control modules to realize data bidirectional transmission, and the node terminal control modules are connected with the corresponding user visible light information mobile devices in a visible light signal transmission mode; wherein,
the user visible light information mobile device is used for sending a visible light signal requesting command information and transmitting the visible light signal to the corresponding node terminal control module, the node terminal control module detects that the visible light signal is transmitted to the corresponding power line carrier communication control module after being processed, and the power line carrier communication control module transmits the modulated visible light signal to the remote central control service platform through the low-voltage power distribution circuit and the corresponding power network bridge;
the remote central control service platform transmits required explanation data information to the corresponding power line carrier communication control module through the corresponding power bridge and the low-voltage power distribution circuit according to the request command information, the power line carrier communication control module demodulates the explanation data information and transmits the demodulated explanation data information to the corresponding node terminal control module, the node terminal control module forms a visible light signal with the explanation data information and transmits the visible light signal to the user visible light information mobile device, and the user visible light information mobile device carries out independent explanation playing on the explanation data information according to the received visible light signal.
Further, the node terminal control module comprises a node embedded controller module, an LED illumination modulation driving module, an LED illumination unit, a demodulation conversion processing circuit, a signal conditioning and amplification processing unit, a light detection receiving unit and a power line carrier communication interface circuit for interfacing with the corresponding power line carrier communication control module, wherein the signal output end of the light detection receiving unit is connected with the signal input end of the signal conditioning and amplification processing unit, the signal output end of the signal conditioning and amplification processing unit is connected with the signal input end of the demodulation conversion processing circuit, the signal input end of the demodulation conversion processing circuit is connected with the node embedded controller module, the signal input end of the LED illumination modulation driving module is connected with the node embedded controller module, the signal output end of the LED illumination modulation driving module is connected with the LED illumination unit, the node embedded controller module is connected with the power carrier communication interface circuit to realize bidirectional data transmission;
the optical detection receiving unit detects and receives a visible light signal of request command information sent by a user visible light information mobile device in real time, removes carrier signals through the signal conditioning and amplification processing unit and the demodulation conversion processing circuit in sequence, and transmits the carrier signals to the node embedded controller module to package power line carrier communication frame data and then transmits the power line carrier communication frame data to the corresponding power line carrier communication control module through the power line carrier communication interface circuit;
the power line carrier communication control module transmits the demodulated required explanation data information to the node embedded controller module through the power line carrier communication interface circuit to unpack the explanation data information and then transmits the explanation data information to the LED illumination modulation driving module to be modulated and controlled, and then converts the explanation data information after modulation control into a visible light signal form through the LED illumination unit and transmits the visible light signal form to the user visible light information mobile device.
Furthermore, a plurality of power line repeaters are connected in parallel on the low-voltage power distribution circuit.
Further, the light detection receiving unit is an array image sensor structure.
Furthermore, the LED lighting unit is an LED light-emitting unit device with an inverted conical lens.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. the node terminal control module of the invention can receive the information such as local ID and the like sent by the user visible light information mobile device which simultaneously enters the LED illumination range in real time during the working process, the information is uploaded to the remote central control service platform through the power line carrier communication control module to carry out corresponding service request, the remote central control service platform transmits the explanation service content through the power line carrier communication control module according to the service request, the visible light LED is controlled by the node terminal control module and is sent back to the user visible light information mobile device to be played and explained, the proposal adopted by the invention avoids that the explanation content can only be played circularly in the unidirectional information transmission mode in the prior art but can not be played independently for each user in real time, thereby ensuring the continuity and independence of listening and explaining of each user, the LED illumination demand of museum exhibition can be satisfied, current low voltage power distribution circuit can be utilized again to carry out communication control to carry out the transmission and the control of pronunciation explanation information in real time.
2. The intelligent explanation system for the museum is configured in a power bridge and power line repeater combined mode, a power bridge can be arranged at each floor of the museum, a power line repeater can be arranged at a position of a low-voltage distribution power line, which is 150 meters away from each other, and the strength of power line carrier communication signals and the effective communication distance are increased, so that the reliability and the effectiveness of communication data are ensured.
3. In the invention, the LED illumination units driven and controlled by the node terminal control modules are in an inverted cone shape in the illumination range and distributed around the museum exhibition stand, so that the uniformity and stability of LED light in the illumination range are ensured.
4. In the invention, the user visible light information mobile device is provided with a visible light information transmitting unit and a visible light information receiving unit so as to ensure the continuity and independence of the explanation and playing of the user visible light information mobile device.
5. The invention is suitable for various indoor places such as museums, science and technology museums, historical memorials and the like.
Drawings
Fig. 1 is a schematic block diagram of a museum intelligent explanation system based on visible light and power line carrier communication according to the present invention;
FIG. 2 is a functional block diagram of a node terminal control module of the present invention;
FIG. 3 is a diagram illustrating a format of a communication data frame between a user visible light information mobile device and a remote central control service platform according to the present invention, wherein a header of the data frame includes a header of another communication protocol, and a trailer of the data frame also includes a trailer of another communication protocol;
fig. 4 is a schematic diagram of the configuration of an indoor exhibition room of a museum.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1, the intelligent explanation system for museum based on visible light and power carrier communication comprises a remote central control service platform, at least one power bridge, the system comprises a plurality of power line carrier communication control modules, a plurality of user visible light information mobile devices and a plurality of node terminal control modules which are respectively arranged at corresponding cultural relic exhibition information points, wherein a central control service platform is respectively connected with power bridges through low-voltage power supply lines to realize data bidirectional transmission, each power bridge is respectively connected with the power line carrier communication control modules through the low-voltage power supply lines to realize data bidirectional transmission, the power line carrier communication control modules are connected with the corresponding node terminal control modules to realize data bidirectional transmission, and the node terminal control modules are connected with the corresponding user visible light information mobile devices in a visible light signal transmission mode; wherein,
the user visible light information mobile device is used for sending a visible light signal requesting command information and transmitting the visible light signal to the corresponding node terminal control module, the node terminal control module detects that the visible light signal is transmitted to the corresponding power line carrier communication control module after being processed, and the power line carrier communication control module transmits the modulated visible light signal to the remote central control service platform through the low-voltage power distribution circuit and the corresponding power network bridge;
the remote central control service platform packs the retrieved effective explanation information according to the power line carrier communication standard protocol according to the request command information, the explanation data information is transmitted to the corresponding power line carrier communication control module through the corresponding power bridge and the low-voltage power distribution power line, the power line carrier communication control module demodulates the explanation data information and transmits the demodulated explanation data information to the corresponding node terminal control module, the node terminal control module forms a visible light signal with the explanation data information and transmits the visible light signal to the user visible light information mobile device, and the user visible light information mobile device carries out independent explanation and playing on the explanation data information according to the received visible light signal.
The electric network bridge is used for controlling indoor layering and zoning of a multi-layer building of an exhibition hall, performing reliable data communication between each node terminal control module of each layer and a remote central control service platform, and expanding a network topology structure of system data communication.
The remote central control service platform can be connected with other networks through a gateway.
As shown in fig. 2, the node terminal control module includes a node embedded controller module, an LED lighting modulation driving module, an LED lighting unit, a demodulation conversion processing circuit, a signal conditioning and amplification processing unit, a light detection receiving unit, and a power line carrier communication interface circuit for interfacing with a corresponding power line carrier communication control module, wherein a signal output end of the light detection receiving unit is connected to a signal input end of the signal conditioning and amplification processing unit, a signal output end of the signal conditioning and amplification processing unit is connected to a signal input end of the demodulation conversion processing circuit, a signal input end of the demodulation conversion processing circuit is connected to the node embedded controller module, a signal input end of the LED lighting modulation driving module is connected to the node embedded controller module, and a signal output end of the LED lighting modulation driving module is connected to the LED lighting unit, the node embedded controller module is connected with the power carrier communication interface circuit to realize bidirectional data transmission;
the node embedded controller module can adopt a 32-bit STM32 single chip microcomputer based on an ARM-CORTEX-M3 inner core as a control core, and provides abundant resources such as on-chip peripherals, a large number of internal registers, on-chip data memories and the like, so that a system hardware circuit of the whole node terminal control module is simplified abnormally, and the workload of system software design is reduced.
The optical detection receiving unit detects and receives a visible light signal of request command information sent by a user visible light information mobile device in real time, removes carrier signals through the signal conditioning and amplification processing unit and the demodulation conversion processing circuit in sequence, and transmits the carrier signals to the node embedded controller module to package power line carrier communication frame data and then transmits the power line carrier communication frame data to the corresponding power line carrier communication control module through the power line carrier communication interface circuit;
the power line carrier communication control module transmits the demodulated required explanation data information to the node embedded controller module through the power line carrier communication interface circuit for unpacking of the explanation data information, then transmits the unpacking data information to the LED illumination modulation driving module for modulation control, and then converts the explanation data information after modulation control into a visible light signal form through the LED illumination unit and transmits the visible light signal form to the user visible light information mobile device. The LED lighting unit emits visible light signals in a short distance within a lighting illumination range while lighting.
A plurality of power line repeaters are connected in parallel on the low-voltage power distribution line, and the power line repeaters are added between the socket power lines of the low-voltage power line at intervals, so that the strength of power line carrier communication signals can be enhanced, and the reliability and the communication data quality of long-distance data communication are ensured. As the museum belongs to a multi-storey building, an electric network bridge is arranged at each storey, and a complex scheme of the electric network bridge and the electric power line repeater is utilized to solve the application scene of low-voltage electric power line communication configuration with long distance relative to the position.
The light detection receiving unit is in an array image sensor structure.
The LED lighting unit is an LED light-emitting unit device with an inverted cone lens, and a stable constant current source power supply is adopted for supplying power, so that the consistency of signal intensity in the transmission process of visible light communication data is ensured, and the binary error rate of the system is reduced.
The information communication between the remote central control service platform and the power line carrier communication control module adopts the narrow-band power line carrier communication standard IEEE-P1901.2/G3-FCC to carry out data wired transmission communication.
And the node terminal control module and the corresponding optical signal transmission mode of the user visible light information mobile device adopt a multi-system frequency shift keying digital modulation mode to carry out information modulation and load the information modulation on the illumination light in the LED illumination unit to carry out information transmission interaction.
The LED illumination modulation driving module adopts a multi-system frequency shift keying digital modulation mode to carry out modulation operation on the explanation data information;
as shown in fig. 3, for the structure of the segmented content of the interpretation data frame in the communication data format between the user visible light information mobile device and the remote central control service platform, the amount of the interpretation data information of the exhibit is generally large, and the exhibit needs to be continuously transmitted in segments during remote transmission, and then continuously combined and restored to the user visible light information mobile device, so that it is necessary to add a data type field in front of the segmented frame data content to distinguish the transmission content from the command, a node number field to distinguish which node is to be transmitted, a sequence number field to represent which data information in the segmented data is the frame data content, a data length field to represent the length information of the frame data content, and a check code to check whether the transmission frame data is correct. The head and tail of other protocol data frames are both the head and tail format content of the power line carrier communication protocol frame or the head and tail format content of the IP communication protocol frame.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a museum's intelligence explanation system based on visible light and power line carrier communication which characterized in that: the system comprises a remote central control service platform, at least one electric power network bridge, a plurality of power line carrier communication control modules, a plurality of user visible light information mobile devices and a plurality of node terminal control modules which are respectively arranged at corresponding cultural relic exhibition information points, wherein the central control service platform is respectively connected with the electric power network bridges through low-voltage power supply lines to realize data bidirectional transmission; wherein,
the user visible light information mobile device is used for sending a visible light signal requesting command information and transmitting the visible light signal to the corresponding node terminal control module, the node terminal control module detects that the visible light signal is transmitted to the corresponding power line carrier communication control module after being processed, and the power line carrier communication control module transmits the modulated visible light signal to the remote central control service platform through the low-voltage power distribution circuit and the corresponding power network bridge;
the remote central control service platform transmits required explanation data information to the corresponding power line carrier communication control module through the corresponding power bridge and the low-voltage power distribution circuit according to the request command information, the power line carrier communication control module demodulates the explanation data information and transmits the demodulated explanation data information to the corresponding node terminal control module, the node terminal control module forms a visible light signal with the explanation data information and transmits the visible light signal to the user visible light information mobile device, and the user visible light information mobile device carries out independent explanation playing on the explanation data information according to the received visible light signal.
2. The intelligent museum explanation system based on visible light and power carrier communication of claim 1, characterized in that: the node terminal control module comprises a node embedded controller module, an LED illumination modulation driving module, an LED illumination unit, a demodulation conversion processing circuit, a signal conditioning and amplification processing unit, a light detection receiving unit and a power line carrier communication interface circuit for interfacing with the corresponding power line carrier communication control module, wherein the signal output end of the light detection receiving unit is connected with the signal input end of the signal conditioning and amplification processing unit, the signal output end of the signal conditioning and amplification processing unit is connected with the signal input end of the demodulation conversion processing circuit, the signal input end of the demodulation conversion processing circuit is connected with the node embedded controller module, the signal input end of the LED illumination modulation driving module is connected with the node embedded controller module, and the signal output end of the LED illumination modulation driving module is connected with the LED illumination unit, the node embedded controller module is connected with the power carrier communication interface circuit to realize bidirectional data transmission;
the optical detection receiving unit detects and receives a visible light signal of request command information sent by a user visible light information mobile device in real time, removes carrier signals through the signal conditioning and amplification processing unit and the demodulation conversion processing circuit in sequence, and transmits the carrier signals to the node embedded controller module to package power line carrier communication frame data and then transmits the power line carrier communication frame data to the corresponding power line carrier communication control module through the power line carrier communication interface circuit;
the power line carrier communication control module transmits the demodulated required explanation data information to the node embedded controller module through the power line carrier communication interface circuit to unpack the explanation data information and then transmits the explanation data information to the LED illumination modulation driving module to be modulated and controlled, and then converts the explanation data information after modulation control into a visible light signal form through the LED illumination unit and transmits the visible light signal form to the user visible light information mobile device.
3. The intelligent museum explanation system based on visible light and power carrier communication of claim 1, characterized in that: and a plurality of power line repeaters are connected in parallel on the low-voltage power distribution circuit.
4. The intelligent museum explanation system based on visible light and power carrier communication of claim 2, characterized in that: the light detection receiving unit is of an array image sensor structure.
5. The intelligent museum explanation system based on visible light and power carrier communication of claim 2, characterized in that: the LED lighting unit is an LED light-emitting unit device with an inverted conical lens.
6. The intelligent museum explanation system based on visible light and power carrier communication of claim 1, characterized in that: the user visible light information moving device has a visible light information transmitting unit and a visible light information receiving unit.
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| CN104270174A (en) * | 2014-10-17 | 2015-01-07 | 清华大学 | Communication method and system with power line and visible light integration |
| CN104852765A (en) * | 2014-02-18 | 2015-08-19 | 上海西门子医疗器械有限公司 | Data communication method, system and CT machine system |
| CN104901739A (en) * | 2015-05-11 | 2015-09-09 | 南昌大学 | Multilingual audio commentary device and method thereof based on visible light communication technology |
| CN105141343A (en) * | 2015-07-24 | 2015-12-09 | 河北省电力建设调整试验所 | Cable tunnel positioning and broadcasting system employing VLC-PLC technologies |
| CN104270174B (en) * | 2014-10-17 | 2017-01-04 | 清华大学 | Communication means that electric lines of force and visible ray merge and system |
| CN106850063A (en) * | 2017-02-15 | 2017-06-13 | 深圳前沿通信技术开发有限公司 | Information transferring method, apparatus and system based on visible light communication |
| CN106982094A (en) * | 2017-04-09 | 2017-07-25 | 深圳市先通网信息科技有限公司 | Visible light communication method and system |
| CN108736969A (en) * | 2017-04-20 | 2018-11-02 | 桂林电子科技大学 | A kind of power line carrier communication coordinate under visible light beacon system |
| CN112543055A (en) * | 2020-12-03 | 2021-03-23 | 上海应用技术大学 | Intelligent navigation system based on visible light communication and control method thereof |
| CN112737635A (en) * | 2019-10-28 | 2021-04-30 | 华为技术有限公司 | Communication method and device |
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| CN106982094A (en) * | 2017-04-09 | 2017-07-25 | 深圳市先通网信息科技有限公司 | Visible light communication method and system |
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| CN113632388A (en) * | 2019-03-26 | 2021-11-09 | 软银股份有限公司 | Communication device, communication method, charging device, and program |
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| CN112737635B (en) * | 2019-10-28 | 2023-02-03 | 华为技术有限公司 | Communication method and device |
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