A direct current carrier communication system in the form of a direct current bridge

Abstract

The application discloses a direct current carrier communication system in the form of a direct current bridge, which comprises a plurality of carrier communication modules, each of which is arranged on a power bus of a zero-carbon building and connected with a power generation system and a main power consumption system of the zero-carbon building, and a direct current bridge is established between the carrier communication modules on different power buses through a direct current carrier information flow; each carrier communication module comprises a CPU module, a power module, a storage module and a communication function module, the power module is connected with the power generation system of the zero-carbon building, and the communication function module comprises a channel estimation unit, a filtering unit, a spectrum sensing unit and a packet aggregation unit. By designing the carrier communication module to cooperate with the power bus of the zero-carbon building to establish a power bridge, the control form is flexible, and the adaptability to the zero-carbon building is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of point communication system building technology, and particularly relates to a direct current bridge form direct current carrier communication system. BACKGROUND

[0002] Since the energy source of zero-carbon buildings is mainly photovoltaic power generation and wind power, and in building construction, lighting and other systems need to be driven by direct current, photovoltaic and battery also require direct current access, plus the conversion between alternating current and direct current will cause energy loss, therefore the development trend of zero-carbon buildings is to adopt a direct current power supply system.

[0003] In order to meet the intelligentization of zero-carbon buildings, the direct application of traditional building intelligent communication systems in zero-carbon buildings will only cause additional energy waste, and the direct application of corresponding alternating current communication systems in the direct current power supply environment of zero-carbon buildings will have poor adaptability and poor reliability. SUMMARY

[0004] The embodiment of the present application provides a direct current bridge form direct current carrier communication system, which has good adaptability to zero-carbon buildings and high operation reliability.

[0005] To achieve the above-mentioned purpose, the embodiment of the present application provides a direct current bridge form direct current carrier communication system, which comprises a plurality of carrier communication modules, each carrier communication module is arranged on a power bus of a zero-carbon building, the carrier communication module is connected with a power generation system and a main power consumption system of the zero-carbon building, and a direct current bridge is established between the carrier communication modules on different power buses through a direct current carrier information flow.

[0006] Each carrier communication module comprises a CPU module, a power module, a storage module and a communication function module, the power module is connected with the power generation system of the zero-carbon building, the communication function module comprises a channel estimation unit, a filter unit, a spectrum sensing unit and a packet aggregation unit, the channel estimation unit is used for detecting and estimating the gain of the direct current carrier channel and the noise of the direct current carrier channel, the filter unit is used for eliminating the self-noise influence of the carrier communication module and the external noise influence of the direct current carrier channel, the spectrum sensing unit is used for detecting the spectrum usage rate and the blank frequency band of the direct current carrier communication channel, and the packet aggregation unit is used for adjusting the packet aggregation of the communication sub-carrier.

[0007] In a possible implementation manner, the carrier communication module is further connected with an Internet of Things data gateway, the Internet of Things data gateway comprises a plurality of terminal connection ports, and the Internet of Things data gateway converts the communication protocol from each terminal connection port into a direct current carrier communication protocol.

[0008] In a possible implementation, the Internet of Things data gateway and the carrier communication module are integrated, and the carrier communication module further comprises a radio frequency communication unit, an optical fiber communication unit and a Bluetooth communication unit.

[0009] In a possible implementation, the DC network bridge staggeredly outputs the voltage of each device, so as to realize the communication transmission of devices on different busbars.

[0010] In a first possible implementation, the channel estimation unit is provided with a compressive sensing algorithm program, and the channel estimation unit estimates the communication channel of the carrier communication module through the compressive sensing algorithm program.

[0011] In a first possible implementation, the filtering unit is realized based on programmable hardware, and the filtering unit is provided with a wavelet transform algorithm, and the filtering unit analyzes the noise signal detected by the channel estimation unit through the wavelet transform algorithm.

[0012] In a possible implementation, the spectrum sensing unit is provided with a cyclic feature detector, the spectrum sensing unit detects the channel spectrum through the cyclic feature detector, and the spectrum sensing unit senses the channel transmission signal through the noise signal obtained by the channel estimation unit and sets a threshold value.

[0013] Compared with the prior art, the DC carrier communication system in the form of a DC network bridge provided by the embodiment of the present application establishes a power network bridge by designing a carrier communication module to cooperate with the power busbar of a zero-carbon building, has a flexible control form, can staggeredly output the voltage of each module, realizes the communication transmission of devices on different busbars, and has multiple functional units in the carrier communication module, which solves the problems of channel estimation, noise reduction and frequency band detection of the DC carrier communication, and effectively improves the adaptability and reliability of the carrier communication system in the zero-carbon building. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of a DC carrier communication system in the form of a DC network bridge provided by an embodiment of the present application;

[0015] Figure 2 is a structural schematic diagram of a carrier communication module provided by an embodiment of the present application. DETAILED DESCRIPTION

[0016] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0017] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a zero-carbon building communication system based on direct current carrier waves, comprising a plurality of carrier wave communication modules 10, each of which is arranged on a power bus of a zero-carbon building, and each of which is connected with a power generation system and a main power consumption system of the zero-carbon building, and direct current network bridges are established between the carrier wave communication modules on different power buses through direct current carrier wave information streams.

[0018] Each carrier wave communication module comprises a CPU module 11, a power supply module 12, a storage module 13 and a communication function module 14, the power supply module is connected with the power generation system of the zero-carbon building, the communication function module comprises a channel estimation unit, a filter unit, a spectrum sensing unit and a packet aggregation unit, the channel estimation unit is used for detecting and estimating the gain of the direct current carrier wave channel and the noise of the direct current carrier wave channel, the filter unit is used for eliminating the self-noise influence of the carrier wave communication module and the external noise influence of the direct current carrier wave channel, the spectrum sensing unit is used for detecting the spectrum usage rate and the blank frequency band of the direct current carrier wave communication channel, and the packet aggregation unit is used for adjusting the packet aggregation of the communication sub-carrier.

[0019] The embodiment of the present application can be applied to various zero-carbon buildings, because the embodiment can arrange a plurality of carrier wave communication modules 10 according to the bus layout of the zero-carbon building, the installation positions of the carrier wave communication modules 10 can change with the change of the bus layout, and it is only required to ensure that the direct current network bridges are established between the carrier wave communication modules 10 on different buses through direct current carrier wave information streams. Since the installation positions of the carrier wave communication modules 10 can change with the change of the bus layout, the communication network carrier, i.e., the direct current network bridge, formed in the zero-carbon building can also change with the change of the bus layout, and thus the plasticity and compatibility of the communication system of the embodiment are relatively strong.

[0020] It should be noted that the power generation system in the embodiment refers to a new energy power generation device, and in the present scheme, wind power generation and photovoltaic power generation are mainly used, and the scheme can be extended to other forms of power generation devices.

[0021] In addition, since the running time of different devices of a building is different, such as lighting, photovoltaic, elevator, air conditioner and the like, the frequency bands and time periods occupied by different devices are different, and thus there are idle frequency bands, and the packet aggregation unit can combine the idle frequency bands to increase the quality and speed of communication.

[0022] Exemplarily, the carrier communication module is further connected with an Internet of Things data gateway, the Internet of Things data gateway comprises a plurality of terminal connection ports, and the Internet of Things data gateway converts communication protocols from the terminal connection ports into direct-current carrier communication protocols.

[0023] By setting the Internet of Things data gateway, interaction and fusion with the control system of the intelligent building can be better realized, and the intelligent function can be integrated into the control system from the visual management platform application. Then, the system intelligent control can be realized by using the mode of “Internet of Things data gateway + iBMS integration + visual operation and maintenance management platform”.

[0024] The power utilization equipment such as lighting, air conditioning, elevator and the like can directly transmit data through the connected Internet of Things data gateway, and the interactive communication between the equipment can be realized by using the direct-current carrier communication on the power bus. The data information of the equipment is transmitted to the building control system (iBMS), and each power utilization equipment is adjusted according to the power utilization information. The visual operation and maintenance management system is the carrier for actual adjustment and monitoring.

[0025] Exemplarily, a data processing module is arranged in the Internet of Things data gateway, the data processing module is realized based on a single-chip microcomputer, the data processing module determines the communication content by a safe authentication mode, and isolates dangerous data.

[0026] The purpose of arranging the data processing module is to further improve the safety performance of the Internet of Things data gateway.

[0027] Exemplarily, the Internet of Things data gateway and the carrier communication module are integrally arranged, and the carrier communication module further comprises a wireless radio frequency communication unit, an optical fiber communication unit and a Bluetooth communication unit.

[0028] Since the topology structure of the whole communication system is limited by the building structure and the equipment structure, in order to realize lightweight design and reduce the complexity of the topology structure, in the embodiment, the Internet of Things data gateway and the carrier communication module are integrally arranged. The wireless radio frequency unit is directed to wireless communication equipment such as mobile phones, AGV vehicles, unmanned aerial vehicles and the like. The optical fiber communication unit is directed to wired communication equipment such as switches, computers, industrial control computers and the like. The Bluetooth communication unit is directed to the Bluetooth device such as a sound box and a loudspeaker device.

[0029] Exemplarily, the direct-current bridge outputs the voltage of each device staggeredly, so as to realize the communication transmission of the devices on different buses.

[0030] Due to the different voltages corresponding to the three power busbars, the DC carrier communication frequency bands of each power busbar are different under normal circumstances, and the three power busbars are connected to each other by using the carrier communication module, and the communication process between different busbars is: sending communication ip+communication content, and the module converts the communication content into the corresponding DC carrier communication frequency band according to the object ip address.

[0031] The communication function module is for the service of DC carrier communication, that is, before the carrier communication content is sent, the communication channel is estimated first to ensure that the channel quality is sufficient, then the noise is removed by using a wavelet, then it is perceived whether the frequency channel is stable, and finally the frequency band communication is allocated.

[0032] Exemplarily, the channel estimation unit is provided with a compressive sensing algorithm program, and the channel estimation unit estimates the communication channel of the carrier communication module by using the compressive sensing algorithm program.

[0033] The channel gain is estimated by using a perception algorithm, which helps subsequent frequency band monitoring while improving the accuracy of channel estimation.

[0034] Exemplarily, the filtering unit is realized based on programmable hardware, and the filtering unit is provided with a wavelet conversion algorithm, and after the noise signal detected by the channel estimation unit is acquired, the noise signal is analyzed by using the wavelet conversion algorithm.

[0035] It should be noted that when the embodiment is implemented, a signal threshold needs to be set to realize noise reduction.

[0036] Exemplarily, the frequency spectrum perception unit is provided with a cycle feature detector, the frequency spectrum perception unit detects the channel frequency spectrum by using the cycle feature detector, and the frequency spectrum perception unit perceives the channel transmission signal by acquiring the noise signal obtained by the channel estimation unit and setting a threshold value.

[0037] Compared with the prior art, the DC carrier communication system in the form of a DC network bridge provided by the embodiment of the application establishes a power network bridge by designing a carrier communication module to cooperate with the power busbars of the zero-carbon building, has a flexible control form, can stagger the voltage output of each module, realizes the communication transmission of the devices on different busbars, and has the carrier communication module including a plurality of functional units, the plurality of functional units solve the problems of channel estimation, noise reduction and frequency band detection of the DC carrier communication, and can effectively improve the adaptability and reliability of the carrier communication system in the zero-carbon building.

[0038] In the embodiments disclosed in the present application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, "connecting" can be fixedly connected, or detachably connected, or integrally connected. "Connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present application can be understood according to the specific circumstances.

[0039] The above is the preferred embodiment of the present application. It should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application. These improvements and refinements are also considered within the scope of protection of the present application.

Claims

1. A DC carrier communication system in the form of a DC bridge, characterized in that, It includes multiple carrier communication modules, each of which is installed on the power bus of the zero-carbon building. The carrier communication modules are connected to the power generation system and the main power consumption system of the zero-carbon building, respectively. The carrier communication modules on different power buses establish a DC bridge through DC carrier information flow. Each carrier communication module includes a CPU module, a power supply module, a storage module, and a communication function module. The power supply module is connected to the power generation system of the zero-carbon building. The communication function module includes a channel estimation unit, a filtering unit, a spectrum sensing unit, and a packet aggregation unit. The channel estimation unit is used to detect and estimate the gain and noise of the DC carrier channel. The filtering unit is used to eliminate the self-noise effect of the carrier communication module and the external noise effect of the DC carrier channel. The spectrum sensing unit is used to detect the spectrum utilization and blank frequency bands of the DC carrier communication channel. The packet aggregation unit is used to adjust the packet aggregation of communication subcarriers. The channel estimation unit is equipped with a compressed sensing algorithm program, which is used to estimate the communication channel of the carrier communication module.

2. The DC carrier communication system in the form of a DC bridge as described in claim 1, characterized in that, The carrier communication module is also connected to an IoT data gateway, which includes multiple terminal connection ports and converts the communication protocols from each terminal connection port into a DC carrier communication protocol.

3. The DC carrier communication system in the form of a DC bridge as described in claim 2, characterized in that, The IoT data gateway is equipped with a data processing module, which is implemented based on a microcontroller. The data processing module judges the communication content through security authentication and isolates dangerous data.

4. The DC carrier communication system in the form of a DC bridge as described in claim 2, characterized in that, The IoT data gateway and the carrier communication module are integrated into one unit. The carrier communication module also has a built-in wireless radio frequency communication unit, an optical fiber communication unit, and a Bluetooth communication unit.

5. The DC carrier communication system in the form of a DC bridge as described in claim 1, characterized in that, The DC bridge interleaves the voltage outputs of various devices, enabling communication transmission between devices on different buses.

6. The DC carrier communication system in the form of a DC bridge as described in claim 1, characterized in that, The filtering unit is implemented based on programmable hardware and includes a wavelet transform algorithm. After acquiring the noise signal detected by the channel estimation unit, the filtering unit analyzes the noise signal using the wavelet transform algorithm.

7. The DC carrier communication system in the form of a DC bridge as described in claim 1, characterized in that, The spectrum sensing unit has a built-in cyclic feature detector. The spectrum sensing unit performs channel spectrum detection through the cyclic feature detector. The spectrum sensing unit senses the channel transmission signal by acquiring the noise signal obtained by the channel estimation unit and sets a threshold value.

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