CN113489512A - Power line communication control method, device and storage medium - Google Patents
Power line communication control method, device and storage medium Download PDFInfo
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Abstract
The application discloses a power line communication control method, a power line communication control device and a storage medium. The power line communication control method comprises the following steps: acquiring a background noise power value on a power line; obtaining the signal-to-noise ratio of the PLC signal based on the transmitting power value and the background noise power value of the PLC signal; and adjusting the transmitting power value of the PLC signal based on the signal-to-noise ratio. The transmitting power value of the PLC signal can be dynamically adjusted based on the signal-to-noise ratio, the transmitting power value of the PLC signal can be properly reduced on the premise of meeting normal communication, interference of the PLC signal to a power grid can be further reduced, conflict between signal communication based on the PLC and electromagnetic compatibility standards can be effectively improved, and meanwhile power consumption of equipment can be reduced.
Description
Technical Field
The present disclosure relates to the field of Power Line Communication (PLC), and in particular, to a method, an apparatus, and a storage medium for controlling Power line Communication.
Background
The power line communication is a communication mode for transmitting data and media signals by using a power line, a transmitting end modulates user data by using a modulation technology, a carrier signal carrying information is loaded on the power line and then transmitted on the power line, and a receiving end demodulates the user data by using a demodulation technology and takes out the user data from the power line. The carrier signal loaded on the power line can generate certain interference on other electric equipment on the power grid, and if the signal is improperly processed, the equipment can not meet the requirement of the electromagnetic compatibility standard, namely, the equipment based on the power line communication has conflict between the signal communication and the electromagnetic compatibility standard.
Disclosure of Invention
In view of the above, embodiments of the present application provide a method, an apparatus, and a storage medium for controlling power line communication, which are used to effectively improve the conflict between signal communication based on power line communication and the satisfaction of the electromagnetic compatibility standard.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a power line communication control method, which comprises the following steps:
acquiring a background noise power value on a power line;
obtaining a signal-to-noise ratio of a Power Line Communication (PLC) signal based on a transmitting power value of the PLC signal and the background noise power value;
adjusting the transmit power value of a PLC signal based on the signal-to-noise ratio.
In some embodiments, said adjusting said transmit power value of PLC signals based on said signal-to-noise ratio comprises:
and if the signal-to-noise ratio is larger than the upper limit value of the set signal-to-noise ratio threshold value, the transmitting power value is reduced based on the signal-to-noise ratio threshold value.
In some embodiments, said throttling down the transmit power value based on the signal-to-noise ratio threshold comprises:
and reducing the transmitting power value of the PLC signal based on the set first adjusting amplitude until the adjusted signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
In some embodiments, said adjusting said transmit power value of PLC signals based on said signal-to-noise ratio comprises:
and if the signal-to-noise ratio is smaller than the lower limit value of the set signal-to-noise ratio threshold value, increasing the transmitting power value based on the signal-to-noise ratio threshold value.
In some embodiments, said adjusting up the transmit power value based on the signal-to-noise ratio threshold comprises:
and if the transmitting power value is determined to be smaller than a set electromagnetic compatibility standard threshold, increasing the transmitting power value of the PLC signal based on a set second adjusting amplitude until the adjusted transmitting power value is larger than or equal to the electromagnetic compatibility standard threshold or the signal-to-noise ratio falls into the signal-to-noise ratio threshold.
In some embodiments, said adjusting up the transmit power value based on the signal-to-noise ratio threshold further comprises:
and determining that the transmitting power value is greater than or equal to a set electromagnetic compatibility standard threshold value, and determining whether to continuously increase the transmitting power value based on the information to be transmitted by the PLC signal.
In some implementations, the determining whether to continue to adjust the transmit power value higher based on information to be communicated by a PLC signal includes:
and if the information to be transmitted is designated information, continuously increasing the transmitting power value of the PLC signal until the signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
In some implementations, the determining whether to continue to adjust the transmit power value higher based on information to be communicated by a PLC signal further comprises: and if the information to be transmitted is not the designated information, stopping the transmission of the PLC signal and generating indication information indicating the PLC fault.
The embodiment of the present application further provides a power line communication control device, including:
the noise detection module is used for acquiring a background noise power value on the power line;
the PLC control module is used for obtaining the signal-to-noise ratio of the PLC signal based on the transmitting power value of the PLC signal and the background noise power value;
the PLC control module is further configured to adjust the transmit power value of a PLC signal based on the signal-to-noise ratio.
The embodiment of the present application further provides a power line communication device, including: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor, when running the computer program, is configured to perform the steps of the method according to an embodiment of the present application.
The embodiment of the application also provides an air conditioning system based on power line communication, including indoor set and off-premises station, the indoor set with the off-premises station is through refrigerant pipe connection, the indoor set reaches the off-premises station is respectively through this embodiment of the application power line communication device connect the power line to carry out the communication through the PLC signal of transmission on the power line.
The embodiment of the present application further provides a storage medium, where a computer program is stored on the storage medium, and when the computer program is executed by a processor, the steps of the method according to the embodiment of the present application are implemented.
According to the technical scheme provided by the embodiment of the application, the background noise power value on the power line is obtained; obtaining the signal-to-noise ratio of the PLC signal based on the transmitting power value and the background noise power value of the PLC signal; and adjusting the transmitting power value of the PLC signal based on the signal-to-noise ratio. Therefore, the transmitting power value of the PLC signal can be dynamically adjusted based on the signal-to-noise ratio, the transmitting power value of the PLC signal can be properly reduced on the premise of meeting normal communication, interference of the PLC signal to a power grid can be further reduced, conflict between signal communication based on the PLC and electromagnetic compatibility standards can be effectively improved, and meanwhile power consumption of equipment can be reduced.
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Fig. 1 is a schematic flowchart of a power line communication control method according to an embodiment of the present application;
fig. 2 is a schematic flow chart illustrating a power line communication control method according to an application example of the present application;
fig. 3 is a schematic structural diagram of a power line communication control device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a power line communication device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
For convenience of description, terms related to the embodiments of the present application are explained as follows:
power line communication: the technique is to modulate an analog or digital signal in a carrier mode and then couple the modulated signal to a power line for transmission.
Electromagnetic Compatibility (EMC): refers to the ability of a device or system to operate satisfactorily in an electromagnetic environment without generating intolerable electromagnetic interference to any device in its environment. Wherein EMC includes two aspects of requirements: on one hand, the electromagnetic interference generated by the equipment to the environment in the normal operation process cannot exceed a certain limit; another aspect is a degree of immunity to electromagnetic interference present in the environment, i.e., electromagnetic susceptibility.
Background noise power value: the value used for characterizing Noise Equivalent Power (NEP) is a value required on a Power line when a signal-to-Noise ratio is 1. That is to say the output voltage generated by the transmitted power projected onto the power line is exactly equal to the noise voltage of the interference voltage itself on the power line.
Transmission power value: for characterizing the power strength of PLC signals transmitted over power lines.
SIGNAL-to-NOISE RATIO (SNR): the method is used for representing the proportional relation between the PLC signal and the background noise on the power line.
The embodiment of the application provides a power line communication control method, which can be applied to a power line communication device, wherein the power line communication device can modulate information to be sent to generate a PLC signal and couple the PLC signal to a power line, and can also decouple the PLC signal from the power line and demodulate the PLC signal to obtain information to be received. As shown in fig. 1, the power line communication control method includes:
here, the power line communication device may obtain the background noise power value on the power line, for example, the background noise power value on the power line may be detected based on the coupling transformer. For example, the power line communication device may periodically obtain the background noise power value on the power line based on the set detection frequency, considering that the power line has volatility, that is, the background noise is dynamically changed.
102, obtaining a signal-to-noise ratio of the PLC signal based on the transmitting power value and the background noise power value of the PLC signal;
it is understood that the power line communication device may determine the transmission power value corresponding to the PLC signal based on the carrier frequency band selected when the PLC signal is generated. The power line communication device can calculate the signal-to-noise ratio of the PLC signal based on the determined transmission power value and the background noise power value obtained in step 101. The method for calculating the signal-to-noise ratio can refer to the known technology, and is not described in detail herein.
And 103, adjusting the transmitting power value of the PLC signal based on the signal-to-noise ratio.
For example, the power line communication device may preset a reference value for comparing and determining the signal-to-noise ratio (i.e., a signal-to-noise ratio threshold), and the signal-to-noise ratio threshold may be determined empirically or reasonably based on experiments.
The power line communication device can adjust the transmission power value of the PLC signal based on the comparison result of the current signal-to-noise ratio and the signal-to-noise ratio threshold value. Therefore, the transmitting power value of the PLC signal can be dynamically adjusted based on the signal-to-noise ratio, the transmitting power value of the PLC signal can be properly reduced on the premise of meeting normal communication, interference of the PLC signal to a power grid can be further reduced, conflict between signal communication based on the PLC and electromagnetic compatibility standards can be effectively improved, and meanwhile power consumption of equipment can be reduced.
Illustratively, the signal-to-noise ratio threshold has an upper value and a lower value, i.e., the signal-to-noise ratio threshold is a range of values. If the signal-to-noise ratio of the PLC signal falls within the range of the signal-to-noise ratio threshold, that is, the signal-to-noise ratio is less than or equal to the upper limit of the signal-to-noise ratio threshold and greater than or equal to the lower limit of the signal-to-noise ratio threshold, the PLC signal can be reliably transmitted by the power line, and at this time, the power line communication device can couple the PLC signal to the power line based on the PLC communication module.
In some embodiments, adjusting the transmit power value of the PLC signal based on the signal-to-noise ratio includes:
and if the signal-to-noise ratio is larger than the upper limit value of the set signal-to-noise ratio threshold, the transmitting power value is reduced based on the signal-to-noise ratio threshold.
In this embodiment, if the power line communication device determines that the current signal-to-noise ratio of the PLC signal is greater than the upper limit value of the set signal-to-noise ratio threshold, the transmission power value of the PLC signal may be reduced based on the signal-to-noise ratio threshold. That is, when the background noise is low, the transmission power of the PLC signal can be appropriately reduced. Therefore, the transmitting power value of the PLC signal can be reduced as much as possible on the premise of meeting normal communication, the interference of the PLC signal to a power grid can be reduced, the conflict between signal communication based on the PLC and the electromagnetic compatibility standard can be effectively improved, and meanwhile, the power consumption of equipment can be reduced.
It should be noted that, in practical applications, because a plurality of devices are connected to the power line network, a combination of different devices can form a plurality of PLC-based communication networks on the power line network. The transmission distance of the PLC signals is approximately in direct proportion to the transmission power value of the PLC signals, if the transmission power of the PLC signals can be properly reduced on the premise of meeting communication requirements, the transmission distance of the PLC signals can be effectively reduced, interference on adjacent or similar communication networks is avoided, and therefore the communication blocking phenomenon is effectively relieved.
In some embodiments, throttling down the transmit power value based on the signal-to-noise threshold comprises:
and reducing the transmitting power value of the PLC signal based on the set first adjusting amplitude until the adjusted signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
It is understood that the transmitting power value of the PLC signal may be gradually adjusted downward based on the set step size (i.e., the first adjustment amplitude), so that the signal-to-noise ratio of the adjusted PLC signal falls within the signal-to-noise ratio threshold. Exemplarily, in the dynamic adjustment process of reducing the transmission power value, whether the signal-to-noise ratio of the adjusted PLC signal is less than or equal to the upper limit value of the signal-to-noise ratio threshold is judged; and if the signal-to-noise ratio of the adjusted PLC signal is less than or equal to the upper limit value of the signal-to-noise ratio threshold, stopping the adjustment, and coupling the PLC signal to the power line based on the adjusted signal transmitting power. In another application example, in order to reduce the transmission power value of the PLC signal as much as possible, a value within the signal-to-noise ratio threshold value close to the lower limit value or the lower limit value of the signal-to-noise ratio threshold value may be selected as a reference value, whether the signal-to-noise ratio of the adjusted PLC signal is less than or equal to the reference value is determined, if so, the adjustment is stopped, and the PLC signal is coupled to the power line based on the adjusted signal transmission power.
In some embodiments, adjusting the transmit power value of the PLC signal based on the signal-to-noise ratio includes:
and if the signal-to-noise ratio is smaller than the lower limit value of the set signal-to-noise ratio threshold, the transmitting power value is increased based on the signal-to-noise ratio threshold.
It can be understood that, if the power line communication device determines that the current signal-to-noise ratio of the PLC signal is smaller than the lower limit value of the set signal-to-noise ratio threshold, the power transmission value of the PLC signal may be increased based on the signal-to-noise ratio threshold. That is, when the background noise is high, the transmission power of the PLC signal can be appropriately increased. Therefore, the transmitting power of the PLC signal can be dynamically adjusted, so that the signal-to-noise ratio of the PLC signal can meet the communication requirement based on the PLC as much as possible.
In some embodiments, upscaling the transmit power value based on the signal-to-noise threshold comprises:
and if the transmission power value is determined to be smaller than the set electromagnetic compatibility standard threshold, the transmission power value of the PLC signal is increased based on the set second adjustment amplitude until the adjusted transmission power value is larger than or equal to the electromagnetic compatibility standard threshold or the signal-to-noise ratio falls into the signal-to-noise ratio threshold.
Here, the electromagnetic compatibility criterion threshold value may be determined empirically or reasonably based on experiments. In order to meet the requirement of electromagnetic compatibility, the transmitting power value of the PLC signal can be made to be smaller than the set electromagnetic compatibility standard threshold value as much as possible, so that the electromagnetic interference on the power network is reduced.
It is understood that the transmission power value of the PLC signal may be gradually increased based on the set step size (i.e., the second adjustment amplitude) so that the adjusted transmission power value is greater than or equal to the electromagnetic compatibility standard threshold, or the signal-to-noise ratio of the adjusted PLC signal falls within the signal-to-noise ratio threshold. Here, the second adjustment range may be the same as or different from the first adjustment range, and the present application is not limited to this.
Exemplarily, in the dynamic adjustment process of increasing the transmission power value, it is first determined whether the current transmission power value is smaller than the electromagnetic compatibility standard threshold based on the electromagnetic compatibility standard threshold, if the current transmission power value is smaller than the electromagnetic compatibility standard threshold, the transmission power value is increased based on the set step length, and the signal-to-noise ratio is recalculated; judging whether the signal-to-noise ratio of the adjusted PLC signal is greater than or equal to the lower limit value of the signal-to-noise ratio threshold, if the current signal-to-noise ratio is greater than or equal to the lower limit value of the signal-to-noise ratio threshold, stopping adjustment, and coupling the PLC signal to the power line based on the adjusted signal transmitting power; if the current signal-to-noise ratio is smaller than the lower limit value of the signal-to-noise ratio threshold, continuously judging whether the current transmitting power value is smaller than the electromagnetic compatibility standard threshold or not, and repeating the control logic until the adjusted transmitting power value is larger than or equal to the electromagnetic compatibility standard threshold or the signal-to-noise ratio falls into the signal-to-noise ratio threshold. Therefore, the power line communication control method can meet the requirement of electromagnetic compatibility, can properly improve the signal-to-noise ratio of the PLC signal, and meets the communication requirement based on the PLC as much as possible, thereby effectively improving the conflict between the signal communication based on the PLC and the electromagnetic compatibility.
In some embodiments, adjusting the transmit power value up based on the signal-to-noise threshold further comprises:
and determining that the transmission power value is greater than or equal to a set electromagnetic compatibility standard threshold value, and determining whether to continuously increase the transmission power value based on the information to be transmitted by the PLC signal.
For example, for a case that the PLC signal transmission power value is greater than or equal to the set electromagnetic compatibility standard threshold, whether the current information to be transmitted is information that needs to be transmitted immediately may be determined based on the information to be transmitted of the PLC signal, and if so, the transmission power value is continuously increased, so that the signal-to-noise ratio of the PLC signal meets the requirement of reliable communication, that is, the electromagnetic compatibility may be sacrificed for a short time, and the reliable communication of the PLC is preferentially met. Based on the control strategy, the conflict between the signal communication based on the power line communication and the electromagnetic compatibility standard can be better improved, and the reliability of the equipment operation based on the PLC is improved.
In some embodiments, determining whether to continue to adjust the transmit power value higher based on information to be communicated by the PLC signal comprises:
and if the information to be transmitted is the designated information, continuously increasing the transmitting power value of the PLC signal until the signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
Here, the power line communication device may determine whether the information to be transmitted is the specific information, for example, the specific information may be any instruction in a preset instruction set, and after receiving an instruction sent by an external device (for example, an indoor unit of an air conditioner or an outdoor unit of an air conditioner), the power line communication device may determine whether the instruction belongs to an instruction in the instruction set, and further determine whether the information to be transmitted is the specific information. For another example, the external device may carry identification information when transmitting information of the specific instruction, and the power line communication apparatus may determine whether the information to be transmitted is the specific information based on whether the received information carries the identification information. The judgment process of whether the information to be transmitted is the designated information is not specifically limited.
For example, the designation information may be an instruction of a high security level, for example, in the case of an air conditioner, the designation information may be a shutdown instruction, an instruction related to a protection action, information of a failure indication, or the like.
If the power line communication device determines that the information to be transmitted is the designated information and the signal-to-noise ratio is smaller than the lower limit value of the set signal-to-noise ratio threshold, the transmission power value of the PLC signal is continuously increased until the signal-to-noise ratio falls into the signal-to-noise ratio threshold, for example, the signal-to-noise ratio of the adjusted PLC signal is larger than or equal to the lower limit value of the signal-to-noise ratio threshold, the adjustment can be stopped, and the information to be transmitted is coupled to the power line for transmission based on the transmission power of the PLC signal.
In some embodiments, determining whether to continue to adjust the transmit power value higher based on information to be communicated by the PLC signal comprises: and if the information to be transmitted is not the designated information, stopping the transmission of the PLC signal and generating indication information indicating the PLC fault.
The power line communication device can judge whether the information to be transmitted is designated information or not based on the method, and if the information is not the designated information and the signal-to-noise ratio is smaller than the lower limit value of the set signal-to-noise ratio threshold value, the transmission of the PLC signal is stopped, and indication information indicating the PLC fault is generated. Therefore, the power line communication device can stop working for non-emergency information and timely remind a user based on the prompt information.
The following describes an exemplary method for controlling power line communication according to an embodiment of the present application with reference to an application example.
As shown in fig. 2, the power line communication control method of the present application example includes the following steps:
Here, the power line communication device may periodically acquire the background noise power value on the power line based on the set detection frequency.
For example, the power line communication device may have a listening module for listening for background noise on the power line, and the power line communication device may determine the corresponding background noise power value based on the background noise listened by the listening module.
Here, the power line communication apparatus may determine an initial transmission power value of the PLC signal based on the carrier frequency band selected when the PLC signal is generated or update a current transmission power value based on the adjusted transmission power value. The power line communication device can calculate the signal-to-noise ratio of the PLC signal based on the corresponding transmitting power value and the acquired background noise power value.
Here, if the power line communication device determines that the current snr of the PLC signal is greater than the upper limit of the set snr threshold, step 204 may be executed, that is, when the background noise is low, the transmission power of the PLC signal may be appropriately reduced.
Illustratively, step 204 may gradually decrease the transmission power value of the PLC signal based on the set step size (i.e., the first adjustment amplitude), and may return to step 202 after decreasing the transmission power value to update the current signal-to-noise ratio.
Here, if the power line communication device determines that the current snr of the PLC signal is less than or equal to the upper limit of the set snr threshold, step 205 may be executed to compare the current snr with the upper limit of the snr threshold.
Here, if the power line communication device determines that the current signal-to-noise ratio of the PLC signal is less than or equal to the upper limit value of the set signal-to-noise ratio threshold and greater than or equal to the lower limit value of the set signal-to-noise ratio threshold, that is, the current signal-to-noise ratio falls within the value range of the set signal-to-noise ratio threshold, the current transmission power value is maintained, that is, the transmission power of the PLC signal is not adjusted, and the PLC communication unit can normally transmit information.
Here, if the power line communication apparatus determines that the current snr of the PLC signal is smaller than the lower limit of the set snr threshold, the power line communication apparatus compares the current transmission power value of the PLC signal with the set emc standard threshold, and performs step 208 or step 209 based on the comparison result.
Here, if the power line communication apparatus determines that the current transmission power value of the PLC signal is smaller than the set electromagnetic compatibility standard threshold, the power line communication apparatus can appropriately increase the transmission power value of the PLC signal. That is, when the background noise is high, the transmitting power of the PLC signal can be properly increased, so that the signal-to-noise ratio of the PLC signal can meet the communication requirement based on the PLC as much as possible.
Illustratively, the transmission power value of the PLC signal may be gradually increased based on the set step size (i.e., the second adjustment amplitude), and the step 202 may be returned to update the current signal-to-noise ratio after the transmission power value is increased. Here, the second adjustment range may be the same as or different from the first adjustment range, and the present application is not limited to this.
Here, if the power line communication device determines that the current transmission power value of the PLC signal is greater than or equal to the set electromagnetic compatibility standard threshold, it further determines whether the information to be transmitted is the specific information, and based on the determination result of whether the information to be transmitted is the specific information, returns to step 208 or executes step 210.
It can be understood that, if the power line communication device determines that the information to be transmitted is the designated information, the power line communication device returns to step 208 to continue to increase the transmission power value of the PLC signal until the signal-to-noise ratio falls within the signal-to-noise ratio threshold, so as to preferentially meet the communication requirement of the designated information.
And step 210, stopping working and displaying communication faults.
Here, if the power line communication device determines that the information to be transmitted is not the designated information, that is, the information to be transmitted is not the information such as the command of the high security level, the power line communication device may stop working, display the indication information of the communication fault, and remind the user of the existence of the communication fault.
As can be seen from the above description, the power line communication control method of the present application example obtains the background noise power value on the power line, calculates the signal-to-noise ratio based on the transmission power value and the background noise power value of the PLC signal, and adjusts the transmission power value of the PLC signal according to the signal-to-noise ratio, so that the power line communication device can meet both the communication requirement and the electromagnetic compatibility standard requirement, and meanwhile, sets a high security level command mechanism, and when a high security level command occurs (for example, specified information such as shutdown, failure, protection command, and the like), preferentially ensures reliable communication, thereby ensuring reliable operation of the power line communication device and safe operation of the external device. When a low-safety level command (namely non-specified information) is carried out, the transmitting power value of the PLC signal is dynamically adjusted according to the signal-to-noise ratio threshold value and the electromagnetic compatibility standard threshold value, the transmitting power of the PLC signal is reduced as much as possible under the conditions that normal communication is ensured and the electromagnetic compatibility standard is met, the interference of the PLC signal to a power grid is reduced, and meanwhile, the power consumption is reduced.
In order to implement the power line communication control method according to the embodiment of the present application, an embodiment of the present application further provides a power line communication control device, where the power line communication control device corresponds to the power line communication control method, and each step in the embodiment of the power line communication control method is also completely applicable to the embodiment of the power line communication control device according to the present application.
As shown in fig. 3, the power line communication control apparatus includes: a noise detection module 301 and a PLC control module 302. The noise detection module 301 is configured to obtain a background noise power value on the power line; the PLC control module 302 is configured to obtain a signal-to-noise ratio of the PLC signal based on the transmission power value of the PLC signal and the background noise power value; PLC control module 302 is further configured to adjust the transmit power value of a PLC signal based on the signal-to-noise ratio.
In some embodiments, PLC control module 302 adjusts the transmit power value of a PLC signal based on the signal-to-noise ratio, including: and if the signal-to-noise ratio is larger than the upper limit value of the set signal-to-noise ratio threshold value, the transmitting power value is reduced based on the signal-to-noise ratio threshold value.
In some embodiments, PLC control module 302 adjusts the transmit power value downward based on the signal-to-noise ratio threshold, including: and reducing the transmitting power value of the PLC signal based on the set first adjusting amplitude until the adjusted signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
In some embodiments, PLC control module 302 adjusts the transmit power value of a PLC signal based on the signal-to-noise ratio, including: and if the signal-to-noise ratio is smaller than the lower limit value of the set signal-to-noise ratio threshold value, increasing the transmitting power value based on the signal-to-noise ratio threshold value.
In some embodiments, PLC control module 302 said adjusting up said transmit power value based on said signal-to-noise ratio threshold comprises:
and if the transmitting power value is determined to be smaller than a set electromagnetic compatibility standard threshold, increasing the transmitting power value of the PLC signal based on a set second adjusting amplitude until the adjusted transmitting power value is larger than or equal to the electromagnetic compatibility standard threshold or the signal-to-noise ratio falls into the signal-to-noise ratio threshold.
In some embodiments, PLC control module 302 adjusts the transmit power value up based on the signal-to-noise ratio threshold, further comprising:
and determining that the transmitting power value is greater than or equal to a set electromagnetic compatibility standard threshold value, and determining whether to continuously increase the transmitting power value based on the information to be transmitted by the PLC signal.
In some embodiments, the PLC control module 302 determines whether to continue to increase the transmit power value based on information to be communicated by the PLC signal, including:
and if the information to be transmitted is designated information, continuously increasing the transmitting power value of the PLC signal until the signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
In some embodiments, the PLC control module 302 determines whether to continue to increase the transmission power value based on information to be transmitted by the PLC signal, further comprising: and if the information to be transmitted is not the designated information, stopping the transmission of the PLC signal and generating indication information indicating the PLC fault.
In practical applications, the noise detection module 301 and the PLC control module 302 may be implemented by a processor in the power line communication device. Of course, the processor needs to run a computer program in memory to implement its functions.
It should be noted that: in the above embodiment, when performing the power line communication control, the power line communication control apparatus is exemplified by only dividing the program modules, and in practical applications, the above processing distribution may be completed by different program modules according to needs, that is, the internal structure of the apparatus is divided into different program modules to complete all or part of the above-described processing. In addition, the power line communication control device and the power line communication control method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.
Based on the hardware implementation of the program module, and in order to implement the method according to the embodiment of the present application, an embodiment of the present application further provides a power line communication device. Fig. 4 shows only an exemplary structure of the power line communication apparatus, not the entire structure, and a part or the entire structure shown in fig. 4 may be implemented as necessary.
As shown in fig. 4, the present embodiment provides a power line communication apparatus 400 including: at least one processor 401 and memory 402. The memory 402 in the embodiment of the present application is used to store various types of data to support the operation of the power line communication apparatus 400. Examples of such data include: any computer program for operating on the power line communication device 400.
The power line communication control method disclosed by the embodiment of the application can be applied to the processor 401, or can be implemented by the processor 401. The processor 401 may be an integrated circuit chip having signal processing capabilities. In the implementation process, the steps of the power line communication control method may be implemented by an integrated logic circuit of hardware in the processor 401 or instructions in the form of software. The Processor 401 described above may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 401 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the memory 402, and the processor 401 reads information in the memory 402, and completes the steps of the control method of the air conditioner provided in the embodiment of the present application in combination with hardware thereof.
In an exemplary embodiment, the processor 401 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the foregoing methods.
It will be appreciated that the memory 402 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memories described in the embodiments of the present application are intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, the power line communication control apparatus 400 further includes: and a PLC signal communication module 403 for coupling or decoupling a PLC signal to or from the power line. That is, the PLC signal communication module 403 may couple the PLC signal modulated by the processor 401 to the power line or decouple the PLC signal from the power line and transmit the PLC signal to the processor 401 based on the transmission power value adjusted by the processor 401, and the information to be received is demodulated by the processor 401. Illustratively, the PLC signal communication module 403 may include a coupling transformer.
It is understood that the various components of the power line communication control apparatus 400 are coupled together by a bus system 404. It will be appreciated that the bus system 404 is used to enable communications among the components for connection. The bus system 404 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 404 in FIG. 4.
In an exemplary embodiment, the present application further provides a storage medium, specifically a computer storage medium, which may be a computer readable storage medium, for example, a memory 402 storing a computer program, where the computer program is executable by a processor 401 of the power line communication apparatus 400 to perform the steps of the method of the present application. The computer readable storage medium may be a ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM, among others.
In the related art, a household air conditioner generally comprises an indoor unit and an outdoor unit, the outdoor unit includes a compressor and a condenser, and the indoor unit includes: the evaporator and the fan are connected with each other through a refrigerant pipeline. Taking a refrigeration process as an example, a compressor compresses a gaseous refrigerant (such as freon) into a high-temperature high-pressure liquid refrigerant, and then sends the high-temperature high-pressure liquid refrigerant to a condenser for heat dissipation, so as to form a medium-temperature medium-pressure liquid refrigerant; the liquid refrigerant formed by the condenser enters the evaporator of the indoor unit through the refrigerant pipeline, the liquid refrigerant is gasified due to sudden increase of space and reduction of pressure, and a large amount of heat can be absorbed in the process of converting liquid into gas, so that the evaporator can be cooled, and when the fan of the indoor unit blows the indoor air from the evaporator, the fan of the indoor unit blows out cold air.
In the working process, the outdoor unit and the indoor unit need to communicate, for example, the indoor unit sends a control instruction to the outdoor unit to control the operation mode of the outdoor unit (for example, starting a compressor, etc.), and the outdoor unit sends the self operation state, the environmental parameters, the fault codes, etc. to the indoor unit.
In the related art, a communication line is often required to be separately arranged between an outdoor unit and an indoor unit, and particularly for a multi-split air conditioning unit, a Controller Area Network (CAN) bus or a 485 bus arranged from the outdoor unit to each indoor unit needs to be connected, controlled and communicated, so that the defects of complex installation, high material and labor cost, inconvenience in maintenance and the like are caused.
Based on this, an embodiment of the present application further provides an air conditioning system based on power line communication, as shown in fig. 5, the air conditioning system based on power line communication includes an indoor unit 501 and an outdoor unit 502, the indoor unit 501 and the outdoor unit 502 are connected through a refrigerant pipe, and the indoor unit 501 and the outdoor unit 502 are respectively connected to a power line 503 through a power line communication device 400 according to the embodiment of the present application, and communicate through a PLC signal transmitted on the power line 503.
It can be understood that the power line communication device performs communication control based on the power line communication control method, so that the conflict between signal communication based on the PLC and the satisfaction of the electromagnetic compatibility standard can be effectively improved, and the reliable transmission of high-security level commands between air conditioning systems can be satisfied.
Therefore, the air conditioning system can realize communication between the indoor unit and the outdoor unit based on the power line, can directly utilize the existing power line to transmit information compared with the traditional air conditioning system in a communication mode, does not need a communication line laid independently, and can reduce the arrangement cost of the air conditioning system. In addition, based on the power line communication device of this application embodiment for the transmission power value of PLC signal can carry out dynamic adjustment based on the SNR, under the prerequisite that satisfies normal communication, can suitably reduce the transmission power value of PLC signal, and then can reduce the interference of PLC signal to the electric wire netting, effectively improve the signal communication based on PLC and satisfy the conflict between the electromagnetic compatibility standard, also can reduce the consumption of equipment simultaneously.
The air conditioning system according to the embodiment of the present application is used to adjust the temperature, humidity, and the like of the environment. The air conditioning system may be a single-cooling air conditioner or a cooling and heating dual-purpose air conditioner, and may be in the form of a wall-mounted air conditioner, a cabinet-mounted air conditioner, a window-mounted air conditioner, or a ceiling-mounted air conditioner, and the like, which is not specifically limited in this embodiment of the present application.
The air conditioning system can be an independent air conditioner with the indoor unit and the outdoor unit in one-to-one correspondence, and can also be a multi-split air conditioning unit, and the embodiment of the application is not particularly limited to this.
It can be understood that the multi-split air conditioning unit is also commonly called a "split-multi" air conditioning unit, and refers to an air conditioning unit formed by connecting and controlling two or more than two air conditioning indoor units (i.e., indoor units) by one air conditioning outdoor unit (i.e., outdoor unit). For example: in a multi-split air conditioning unit, an air conditioning outdoor unit conveys a refrigerant (heating agent) to two or more air conditioning indoor units through a pipeline, and the air conditioning outdoor unit regulates and meets the temperature regulation requirement of the air conditioning indoor units by controlling the circulation amount of the refrigerant (heating agent) and the flow rate of the refrigerant (heating agent) entering the indoor units. And each air conditioner indoor unit can control the air conditioner outdoor unit through independent parameter setting so as to meet the requirements of different rooms on temperature and/or humidity. For a multi-split air conditioning unit, each indoor unit and the outdoor unit side are provided with the power line communication device of the embodiment, so that communication connection based on a power line is realized, and the defects of complex installation, high material and labor cost, inconvenience in maintenance and the like caused by connection, control and communication of a Controller Area Network (CAN) bus or a 485 bus arranged from an outdoor unit to each indoor unit CAN be avoided, so that the communication Network is constructed by using the arranged power line, the arrangement cost is low, and the maintenance is convenient.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The technical means described in the embodiments of the present application may be arbitrarily combined without conflict.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (12)
1. A power line communication control method is characterized by comprising the following steps:
acquiring a background noise power value on a power line;
obtaining the signal-to-noise ratio of the PLC signal based on the transmitting power value of the PLC signal in power line communication and the background noise power value;
adjusting the transmit power value of a PLC signal based on the signal-to-noise ratio.
2. The method of claim 1, wherein said adjusting said transmit power value of a PLC signal based on said signal-to-noise ratio comprises:
and if the signal-to-noise ratio is larger than the upper limit value of the set signal-to-noise ratio threshold value, the transmitting power value is reduced based on the signal-to-noise ratio threshold value.
3. The method of claim 2, wherein the throttling down the transmit power value based on the signal-to-noise ratio threshold comprises:
and reducing the transmitting power value of the PLC signal based on the set first adjusting amplitude until the adjusted signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
4. The method of claim 1, wherein said adjusting said transmit power value of a PLC signal based on said signal-to-noise ratio comprises:
and if the signal-to-noise ratio is smaller than the lower limit value of the set signal-to-noise ratio threshold value, increasing the transmitting power value based on the signal-to-noise ratio threshold value.
5. The method of claim 4, wherein said adjusting the transmit power value up based on the SNR threshold comprises:
and if the transmitting power value is determined to be smaller than a set electromagnetic compatibility standard threshold, increasing the transmitting power value of the PLC signal based on a set second adjusting amplitude until the adjusted transmitting power value is larger than or equal to the electromagnetic compatibility standard threshold or the signal-to-noise ratio falls into the signal-to-noise ratio threshold.
6. The method of claim 5, wherein the adjusting up the transmit power value based on the SNR threshold further comprises:
and determining that the transmitting power value is greater than or equal to a set electromagnetic compatibility standard threshold value, and determining whether to continuously increase the transmitting power value based on the information to be transmitted by the PLC signal.
7. The method of claim 6, wherein the determining whether to continue to adjust the transmit power value higher based on information to be communicated by the PLC signal comprises:
and if the information to be transmitted is designated information, continuously increasing the transmitting power value of the PLC signal until the signal-to-noise ratio falls into the signal-to-noise ratio threshold value.
8. The method of claim 6, wherein the determining whether to continue to adjust the transmit power value higher based on information to be communicated by the PLC signal comprises:
and if the information to be transmitted is not the designated information, stopping the transmission of the PLC signal and generating indication information indicating the PLC fault.
9. A power line communication control apparatus, comprising:
the noise detection module is used for acquiring a background noise power value on the power line;
the PLC control module is used for obtaining the signal-to-noise ratio of the PLC signal based on the transmitting power value of the PLC signal and the background noise power value;
the PLC control module is further configured to adjust the transmit power value of a PLC signal based on the signal-to-noise ratio.
10. A power line communication apparatus, comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein,
the processor, when executing the computer program, is adapted to perform the steps of the method of any of claims 1 to 8.
11. An air conditioning system based on power line communication, comprising an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected through a refrigerant pipe, and the indoor unit and the outdoor unit are respectively connected with a power line through the power line communication device according to claim 10 and communicate through a PLC signal transmitted on the power line.
12. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the method of any one of claims 1 to 8.
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