Communication application system based on HPLC broadband power line carrier

Abstract

The invention discloses a communication application system based on HPLC (High Performance Liquid Chromatography) broadband power line carrier, which relates to the field of communication technology and power management, finds out all intersections connected with each road section through GIS (Geographic Information System) data, obtains the pedestrian flow of the road section according to the intersections, and transmits information to a traffic control department through the HPLC broadband power line carrier. A street lamp management department sends a visitor flow rate information acquisition application to a traffic management department, the comprehensive visitor flow rate of each road section at each moment is calculated by combining an entropy weight method with a TOPSIS method, the moments [tstart, tend] of different road sections are divided into moment intervals corresponding to a high grade, a middle grade and a low grade, the road sections are divided into road sections needing additional power supply and road sections not needing additional power supply, and the road sections are divided into road sections needing additional power supply and road sections not needing additional power supply. And the street lamps needing additional power supply firstly supply power through the street lamps not needing additional power supply of the road section, and then the road section not needing additional power supply supplies power to the street lamps needing additional power supply. The use efficiency of electric energy stored by street lamps in different road sections is effectively improved.

Description

Technical Field

[0001] The present invention relates to the fields of communication technology and power management, and specifically to a communication application system based on HPLC broadband power line carrier. Background Art

[0002] In traditional street lamp management systems, solar street lamps, as important lighting facilities, have many problems that need to be solved urgently.

[0003] From the perspective of the power supply mode, the power supply of traditional solar street lamps often adopts a fixed-time mode. Regardless of the actual number of pedestrians, the street lamps are turned on and off according to the specified time, and the brightness remains constant. Solar street lamps rely on absorbing solar energy during the day and converting it into electrical energy for storage for night lighting. In some remote sections, there are almost no pedestrians late at night, but the street lamps are still fully powered, resulting in a great waste of electrical energy.

[0004] In terms of information acquisition, traditional solar street lamp management lacks effective communication means and cannot timely and effectively understand the working status and power information of street lamps. Especially when a street lamp fails, it often needs manual inspection to be discovered, which not only consumes a lot of time and manpower but also affects the travel safety of citizens.

[0005] In terms of power allocation, due to factors such as the location and lighting conditions of different solar street lamps, there are differences in the stored power, and it is impossible to borrow power between street lamps. At the same time, the number of pedestrians in different sections is different, and the lighting requirements for street lamps are also different, which makes the remaining stored power of solar street lamps in each section different. For example, in busy commercial sections, the number of pedestrians is large, the street lamps are used frequently, and the stored power is consumed quickly; while in remote residential sections, the number of pedestrians is small, and the stored power of street lamps is relatively more remaining. The traditional street lamp management system cannot reasonably borrow the stored power between different sections according to these differences, resulting in unreasonable energy distribution.

[0006] With the development of the Internet of Things technology, HPLC broadband power line carrier technology has brought new possibilities for street lamp management, but there are still obvious deficiencies in intelligent power supply in combination with pedestrian flow information at present, and the advantages of this technology cannot be fully utilized. Therefore, an innovative solution is urgently needed. Summary of the Invention

[0007] Aiming at the deficiencies of the existing technology, the present invention provides a communication application system based on HPLC broadband power line carrier, which solves the problems of energy waste, untimely information acquisition, and unreasonable power allocation existing in the traditional street lamp management system.

[0008] To achieve the above objectives, the present invention is realized through the following technical solutions: A communication application system based on HPLC broadband power line carrier, including:

[0009] An information collection module. This module uses GIS data to find all intersections connected to each road section, obtains the pedestrian flow towards each road section through the monitoring facilities at the intersections, and transmits the pedestrian flow data to the traffic management department via HPLC broadband power line carrier. The street lamp management department sends an application for obtaining pedestrian flow information to the traffic management department. If the application is approved, it obtains the pedestrian flow information at different times for each road section and transmits this information to the information processing module;

[0010] An information processing module. This module analyzes the pedestrian flow information at different times, obtains the pedestrian flow at each intersection of different road sections at time intervals [tstart, tend], calculates the comprehensive pedestrian flow of each road section at each time through the entropy weight method combined with the TOPSIS method, obtains a number of data at different times for the same road section, divides the time intervals [tstart, tend] of different road sections into three corresponding time intervals of high, medium, and low levels, and transmits the three corresponding time intervals of high, medium, and low levels of different road sections to the intelligent power supply module, where tstart and tend are the street lamp turn-on time and turn-off time of the road section.

[0011] As a further solution of the present invention, an intelligent power supply module is further included after the information processing module. The intelligent power supply module sets the output powers of the street lamps corresponding to the high, medium, and low pedestrian flow time intervals of the road section as P1, P2, and P3 respectively, calculates the total power consumption P1*t1 + P2*t2 + P3*t3 of each street lamp in each road section during the time interval [tstart, tend], obtains the solar power generation of each street lamp through HPLC broadband power line carrier, subtracts the two to obtain the stored power of the street lamp after completing lighting, adds up the stored powers of all street lamps to obtain the total stored power of the road section, records the road sections with positive stored power as road sections that do not require additional power supply, and records the road sections with negative stored power as road sections that require additional power supply. Divide the street lamps of the road sections that require additional power supply into street lamps that do not require additional power supply and street lamps that require additional power supply. The street lamps that require additional power supply are first powered by the street lamps that do not require additional power supply in the same road section, and then are powered by the road sections that do not require additional power supply.

[0012] As a further solution of the present invention, the specific steps for the street lamp management department to send an application to the traffic management department are as follows:

[0013] The street lamp management department and the traffic management department register with the CA. After the CA's review is passed, public keys and private keys are generated for both parties, and the public keys are bound to the identity information to make digital identity certificates and issue them;

[0014] When the street lamp management department sends a data viewing application to the traffic management department, it encapsulates its own digital identity certificate into the application data packet and transmits it through the HPLC network;

[0015] After the traffic management department receives the application, it extracts the digital identity certificate, verifies the digital signature on the certificate with the CA public key, confirms that the certificate is issued by the CA and has not been tampered with, and checks the validity period and status. If it passes, it recognizes the other party's identity;

[0016] Before the street lamp management department sends the application, it digitally signs the application information with the private key to generate a unique signature value;

[0017] The traffic management department verifies the signature value with the public key in the street lamp management department's certificate. If it passes, it approves the street lamp management department's application and transmits the pedestrian flow information to the street lamp management department. Otherwise, it rejects the application.

[0018] As a further solution of the present invention, the steps of calculating the comprehensive pedestrian flow by combining the entropy weight method and the TOPSIS method are as follows:

[0019] If a section is connected to n intersections, record the pedestrian flow data of each intersection at each moment to form a 1×n matrix X = (x1, x2,..., xn), where Xi represents the pedestrian flow of the i-th intersection;

[0020] According to the formula Normalize the original data to obtain the standardized matrix Y = (yij), where xij is the original data and yij is the standardized data;

[0021] According to the formula Calculate the entropy value of the pedestrian flow data of each intersection, where m is the number of samples;

[0022] According to the formula Calculate the entropy weight of each intersection;

[0023] Determine the positive ideal solution Z + =(y 1max ,...,y nmax ) and the negative ideal solution Z - =(y 1min ,...,y nmin ), where y jmax and y jmin are respectively the maximum and minimum values of the pedestrian flow of the j-th intersection after standardization;

[0024] According to the formula and Calculate the distance between the pedestrian flow data of each intersection and the positive and negative ideal solutions;

[0025] According to the formula Calculate the comprehensive evaluation value Ci of each intersection;

[0026] According to the formula Obtain the comprehensive pedestrian flow of the road section at this moment.

[0027] As a further solution of the present invention, if S < Smin, this moment is classified as low pedestrian flow; if S ∈ [Smin, Smax], this moment is classified as medium pedestrian flow; if S > Smax, this moment is classified as high pedestrian flow, where Smin and Smax are the upper and lower limits of the comprehensive pedestrian flow.

[0028] As a further solution of the present invention, according to historical data, the time intervals of multiple groups of high pedestrian flow on the same road section are [ai, bi], and the time of medium pedestrian flow is [ci, di]. Then, the abnormal intervals in [ai, bi] and [ci, di] are removed, and the intersection of the remaining intervals is calculated. The comprehensive time of high pedestrian flow is [a’, b’], the time of medium pedestrian flow is [c’, d’], and the time of low pedestrian flow is [tstart, tend] - [a’, b’] - [c’, d’].

[0029] As a further solution of the present invention, the street lights that require additional power supply indicate that the solar power generation minus the power consumption during the time period [tstart, tend] is negative, and the street lights that do not require additional power supply indicate that the solar power generation minus the power consumption during the time period [tstart, tend] is positive.

[0030] As a further solution of the present invention, mark the initial time when the street lights that require additional power supply need additional power supply, and determine the power supply priority according to the initial time. Select the nearest street light that does not require additional power supply as the power supply object. If the initial times of the street lights that require additional power supply are the same and the power supply object is the same, the power supply object preferably selects the one with a shorter distance for power supply.

[0031] The present invention provides a communication application system based on HPLC broadband power line carrier, which has the following beneficial effects compared with the prior art:

[0032] (1) By combining pedestrian flow information to intelligently manage the power supply of street lights, the present invention can adjust the brightness of street lights according to the actual needs of different time periods, provide sufficient lighting when the pedestrian flow is large, and reduce the brightness when the pedestrian flow is small, thus effectively saving energy.

[0033] (2) Using HPLC broadband power line carrier technology for data transmission, the present invention does not require additional laying of communication lines, reduces the system construction cost, and improves the stability and reliability of data transmission at the same time.

[0034] (3) By borrowing power between different street lights on the same road section and between street lights on different road sections, the present invention effectively ensures the full utilization of electric energy resources. Description of the Drawings

[0035] Figure 1 This is the system principle block diagram of the present invention. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0037] As Figure 1 , this application provides a communication application system based on HPLC broadband power line carrier, including:

[0038] An information collection module. This module should find all intersections connected to each road section. Therefore, a detailed topological analysis of the urban road network is required. Here, the geographical information system GIS data can be used. This data contains the precise geographical locations of all road sections and intersections in the city. By processing and analyzing this data, it is possible to accurately identify which intersections are connected to each road section. For example, in a city's traffic network, a main road may be connected to multiple crossroads, T-junctions, etc. Through the analysis of GIS data, these connection relationships can be clearly determined;

[0039] After determining the intersections connected to each road section, find the corresponding monitoring devices for that road section. These monitoring devices usually use high-definition cameras and advanced image processing technologies to be able to capture in real time the situation of people flowing through the intersection to different road sections. The installation positions and angles of the cameras are carefully designed by the traffic management department to ensure comprehensive and clear coverage of all directions and areas of the intersection. For example, at a large crossroads, cameras may need to be installed at the four corners to ensure non-blind spot monitoring of the flow of people throughout the intersection;

[0040] The monitoring devices use image processing and computer vision algorithms to analyze the real-time video images, thereby statistically obtaining the pedestrian flow information at different times on different road sections. These algorithms can identify pedestrians in the images and track and count them. To improve the accuracy and reliability of the data, the monitoring devices will collect the pedestrian flow data at a certain time interval. The above time interval is usually one minute, and the collected data is preliminarily processed and verified. For example, at a busy commercial street intersection, the monitoring device counts the number of pedestrians passing through the intersection every minute and records it;

[0041] The pedestrian flow information collected at different times on different road sections needs to be encapsulated for transmission via HPLC broadband power line carrier. The encapsulation process includes encoding the data and adding necessary header information such as source address, destination address, data type, etc., to ensure that the data can be accurately transmitted to the traffic management department. For example, the pedestrian flow data collected every minute is encoded in a specific format, and the identification information and timestamp of the intersection are added to form a complete data packet.

[0042] The encapsulated data packet is transmitted by loading the data signal onto the power line through a modem connected to the power line. During the transmission process, the data will pass through a series of relay and forwarding nodes to ensure accurate arrival at the data receiving end of the traffic management department. For example, in the street lamp network of a city, the monitoring devices at each intersection are connected to the nearby street lamp control nodes through the power line. The data is preliminarily processed and forwarded by the street lamp control nodes and finally transmitted to the server of the traffic management department through the HPLC network.

[0043] After receiving the pedestrian flow data packet, the traffic management department will decode and verify it to ensure the integrity and accuracy of the data, and store these data in the database for subsequent further analysis and processing. For example, the traffic management department can analyze the traffic flow distribution in the city based on the pedestrian flow information at different intersections to provide strong support for traffic management and planning.

[0044] The street lamp management department sends an application to the traffic management department to obtain pedestrian flow information, so as to prepare for adjusting the output power of street lamps according to the pedestrian flow information at different times on different road sections in the future.

[0045] The process for the street lamp management department to send an application to the traffic management department to obtain pedestrian flow information is as follows:

[0046] (1) Both the street lamp management department and the traffic management department need to register with the certification authority CA. CA is responsible for verifying the identity information of the participating parties and issuing legally valid digital identity certificates to them. During the registration process, both the street lamp management department and the traffic management department need to provide a series of true and valid identity information to CA, such as organization code, unit address, legal representative information, etc. CA will strictly review this information to ensure its authenticity and accuracy. After passing the review, CA will generate a pair of keys, namely public key and private key, for the street lamp management department and the traffic management department respectively. At the same time, CA will bind the public key and relevant identity information, make it into a digital identity certificate, and issue it to the corresponding department.

[0047] (2) When the street lamp management department sends a data viewing application to the traffic management department, it will encapsulate its own digital identity certificate in the application data packet and send the encapsulated application data packet to the traffic management department through the HPLC broadband power line carrier communication network. In this process, the data transmission follows the HPLC communication protocol to ensure the orderly and accurate transmission of data;

[0048] (3) After receiving the application data packet, the traffic management department extracts the digital identity certificate therein and uses the public key of the CA to verify the digital signature on the digital identity certificate. If the verification passes, it can be confirmed that the digital identity certificate was indeed issued by the CA and the certificate content has not been tampered with during the transmission process. At the same time, the traffic management department will further check the validity period and status of the digital identity certificate to ensure that the certificate has not expired or been revoked; Only when all verifications of the digital identity certificate pass will the traffic management department recognize the identity of the street lamp management department;

[0049] (4) Before sending the application information, the street lamp management department will digitally sign the application information using its own private key, combine the application information and the private key to generate a unique signature value. This signature value can prove the integrity and authenticity of the application information. Through this verification, even if the application information is tampered with during the transmission process, the signature value will change, thus ensuring the integrity of the application information;

[0050] (5) After receiving the signed application information, the traffic management department will use the public key in the digital identity certificate of the street lamp management department to verify the signature. The public key and the private key are a pair of related keys, and only the corresponding public key can correctly verify the signature generated by the private key; If the signature verification passes, it means that the application information has not been tampered with during the transmission process, and the traffic management department will transmit the pedestrian flow information to the street lamp management department. If the signature verification fails, the traffic management department will reject the application.

[0051] An information processing module that obtains the historical pedestrian flow information of each intersection transmitted by the traffic management department. By analyzing these historical information, the pedestrian flow level of different road sections during the street lamp opening time can be obtained, and thus the output power of the street lamps can be adjusted according to different pedestrian flow levels;

[0052] After obtaining the pedestrian flow information, the street lamp management department uses GIS data to find all the intersections connected to different road sections, obtains the pedestrian flow data of different road sections between the time periods [tstart, tend], and calculates the comprehensive pedestrian flow of each road section at each moment using the entropy weight method combined with the TOPS IS method. The specific steps are as follows:

[0053] Collect the pedestrian flow data of each intersection connected by a road section at the same moment to construct an initial data matrix. Assume that a certain road section is connected to n intersections. At a certain moment, record the pedestrian flow data of each intersection to form a 1×n matrix X = (x1, x2,..., xn), where Xi represents the pedestrian flow of the i-th intersection;

[0054] According to the formula Perform normalization processing on the original data to obtain a standardized matrix Y = (yij), where xij is the original data and yij is the standardized data;

[0055] According to the formula Calculate the entropy value of the pedestrian flow data of each intersection, where m is the number of samples, and Ej reflects the degree of dispersion of the pedestrian flow data of the j-th intersection. The more discrete the data, the smaller the entropy value, and the greater the role of this intersection in the evaluation;

[0056] According to the formula Calculate the entropy weight of each intersection, which reflects the relative importance of the pedestrian flow of each intersection to the overall pedestrian flow of the road section. The larger the weight, the greater the impact of the pedestrian flow of this intersection on the comprehensive evaluation;

[0057] Determine the positive ideal solution Z + =(y 1max ,...,y nmax ) and the negative ideal solution Z - =(y 1min ,...,y nmin ), where y jmax and y jmin are respectively the maximum and minimum values of the pedestrian flow of the j-th intersection after standardization;

[0058] According to the formula and Calculate the distance between the pedestrian flow data of each intersection and the positive and negative ideal solutions;

[0059] According to the formula Calculate the comprehensive evaluation value Ci of each intersection;

[0060] According to the formula Obtain the comprehensive pedestrian flow of the road section at this moment;

[0061] Classify and process these data according to S, and divide the pedestrian flow at each intersection into three levels: low, medium, and high. The specific classification is as follows: If S < Smin, it indicates a small pedestrian flow and is classified as low; if S ∈ [Smin, Smax], it indicates a general pedestrian flow and is classified as medium; if S > Smax, it indicates a large pedestrian flow and is classified as high. Here, Smin and Smax are the upper and lower limits of the comprehensive pedestrian flow, and tstart and tend are the start time and end time of the street lamp opening;

[0062] Based on historical data, for multiple groups of the same road section, the high pedestrian flow moments during the street lamp opening time [tstart, tend] are [a1, b1],..., [aq, bq], and the medium pedestrian flow moments are [c1, d1],..., [cq, aq]. Eliminate the abnormal intervals in [a1, b1],..., [aq, bq] and [c1, d1],..., [cq, aq], and then find the intersection of the remaining intervals. The resulting comprehensive high pedestrian flow moment is [a’, b’], and the medium pedestrian flow moment is [c’, d’]. The rest are all counted as low pedestrian flow moments.

[0063] Intelligent power supply module. For the high pedestrian flow moment, the output power of the street lamp is P1; for the medium pedestrian flow moment, the output power of the street lamp is P2; for the low pedestrian flow moment, the output power of the street lamp is P3;

[0064] Calculate the total power consumption of each street lamp in each road section during the time [tstart, tend], and the power obtained from solar energy today. Subtract the latter from the former to get the stored power of this street lamp today. Add up the stored powers of all street lamps to get the total stored power of this road section. Record the road sections with positive stored power as those that do not require additional power supply, and those with negative stored power as those that require additional power supply;

[0065] For example, Street Lamp 1 needs to output 25 degrees of electricity tonight, with an actual stored power of 20 degrees, and the remaining power is 20 - 25 = -5 degrees; Street Lamp 2 needs to output 15 degrees of electricity tonight, with an actual stored power of 18 degrees, and the remaining power is 18 - 15 = 3 degrees; Street Lamp 3 needs to output 22 degrees of electricity tonight, with an actual stored power of 19 degrees, and the remaining power is 19 - 22 = -3 degrees; and so on. Calculate the total remaining stored power of all street lamps on this road section as -10 degrees. According to the negative total, this road section is determined to be a road section that requires additional power supply. If the total remaining stored power of all street lamps on another road is 15 degrees, then this road section is a road section that does not require additional power supply;

[0066] Divide the street lights on the section that requires additional power supply into those that do not require additional power supply and those that do. Mark the initial moment when the street lights that require additional power supply need additional power. Assume there are 20 street lights on section one, and street light C needs additional power after 9 pm, indicating that the current power stored in it has been consumed at previous moments. The system will accurately mark this moment as 9 pm;

[0067] Record the remaining power of the street lights on this section that do not require additional power supply after subtracting the power consumed during the time period [tstart, tend] as the remaining power;

[0068] When powering the section that requires additional power supply, first consider power supply between the street lights on this section. The street lights that require additional power supply determine the power supply priority according to the initial moment, and select the nearest street light that does not require additional power supply as the power supply object. If the initial moments of the street lights that require additional power supply are the same and the power supply object is the same, the power supply object will preferentially select the nearer one for power supply. For example, at 8:30 pm, street lights D and E both require additional power supply. The distance between street light D and G with the largest remaining power is 3, and the distance between street light E and G is 5. At this time, to minimize losses during power storage and transmission, select to supply power to D first;

[0069] For the section that requires additional power supply, after power supply is completed through power supply between the internal street lights, it is still necessary to borrow power from the external sections that do not require additional power supply. To prevent losses during power transmission due to distance, first consider borrowing power from the nearest section that does not require additional power supply. If the power is still not sufficient, continue to borrow power from the second nearest section that does not require additional power supply, and so on, until the power consumption of this street light today is satisfied.

[0070] Some of the data in the above formula are numerically calculated after removing their units, and the content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0071] The above embodiments are only used to illustrate the technical method of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A communication application system based on HPLC broadband power line carrier, characterized in that, Including: An information collection module, which finds all intersections connected to each road section through GIS data, obtains the pedestrian flow to each road section using the monitoring facilities at the intersections, and transmits the pedestrian flow data to the traffic management department through HPLC broadband power line carrier. The street lamp management department sends an application for obtaining pedestrian flow information to the traffic management department. If the application is approved, it obtains the pedestrian flow information at different times for each road section and transmits this information to the information processing module; An information processing module, which analyzes the pedestrian flow information at different times, obtains the pedestrian flow at each intersection of different road sections during the time period [tstart, tend], calculates the comprehensive pedestrian flow of each road section at each time through the entropy weight method combined with the TOPSIS method, obtains several data at different times for the same road section, divides the time period [tstart, tend] of different road sections into time intervals corresponding to high, medium, and low levels, and transmits the time intervals corresponding to the high, medium, and low levels of different road sections to the intelligent power supply module, where tstart and tend are the street lamp turn-on time and turn-off time of the road section.

2. The communication application system based on HPLC broadband power line carrier according to claim 1, wherein After the information processing module, there is also an intelligent power supply module. The intelligent power supply module sets the output powers of the street lamps corresponding to the high, medium, and low pedestrian flow time intervals of the road section as P1, P2, and P3 respectively, calculates the total power consumption P1*t1 + P2*t2 + P3*t3 of each street lamp in each road section during the time period [tstart, tend], obtains the solar power generation of each street lamp through HPLC broadband power line carrier, subtracts the two to get the stored power of the street lamp after completing lighting, adds up the stored powers of all street lamps to get the total stored power of the road section, records the road sections with positive stored power as road sections that do not require additional power supply, and records the road sections with negative stored power as road sections that require additional power supply. Divide the street lamps of the road sections that require additional power supply into street lamps that do not require additional power supply and street lamps that require additional power supply. The street lamps that require additional power supply are first powered by the street lamps that do not require additional power supply in the same road section, and then powered by the road sections that do not require additional power supply.

3. The communication application system based on HPLC broadband power line carrier according to claim 1, wherein The specific steps for the street lamp management department to send an application to the traffic management department are as follows: The street lamp management department and the traffic management department register with the CA. After the CA's review is passed, public keys and private keys are generated for both parties, and the public keys are bound to the identity information to make digital identity certificates and issue them; When the street lamp management department sends a data viewing application to the traffic management department, it encapsulates its own digital identity certificate into the application data packet and transmits it through the HPLC network; After receiving the application, the traffic management department extracts the digital identity certificate, verifies the digital signature on the certificate with the CA public key, confirms that the certificate is issued by the CA and has not been tampered with, and checks the validity period and status. If it passes, it recognizes the other party's identity; Before the street lamp management department sends the application, it digitally signs the application information with the private key to generate a unique signature value; The traffic management department verifies the signature value with the public key in the street lamp management department's certificate. If it passes, it approves the street lamp management department's application and transmits the pedestrian flow information to the street lamp management department. Otherwise, it rejects the application.

4. The communication application system based on HPLC broadband power line carrier according to claim 1, wherein The steps for calculating the comprehensive pedestrian flow through the entropy weight method combined with the TOPSIS method are as follows: If a road section connects n intersections, record the pedestrian flow data of each intersection at each moment to form a 1×n matrix X = (x1, x2,..., xn), where Xi represents the pedestrian flow at the i-th intersection; According to the formula normalize the original data to obtain the standardized matrix Y = (yij), where xij is the original data and yij is the standardized data; According to the formula calculate the entropy value of the pedestrian flow data at each intersection, where m is the number of samples; According to the formula calculate the entropy weight of each intersection; Determine the positive ideal solution $Z^+$ + =(y 1max ,...,y nmax ) and the negative ideal solution $Z^-$ - =(y 1min ,...,y nmin ), where $y_j^+$ jmax and $y_j^-$ jmin are the maximum and minimum values of the pedestrian flow at the $j$-th intersection after standardization, respectively; According to the formula and calculate the distances between the pedestrian flow data at each intersection and the positive ideal solution and the negative ideal solution; According to the formula calculate the comprehensive evaluation value Ci of each intersection; According to the formula the comprehensive pedestrian flow of the road section at this moment is obtained.

5. The communication application system based on HPLC broadband power line carrier according to claim 4, characterized in that If S < Smin, classify this moment as low pedestrian flow. If S ∈ [Smin, Smax], classify this moment as medium pedestrian flow. If S > Smax, classify this moment as high pedestrian flow, where Smin and Smax are the upper and lower limits of the comprehensive pedestrian flow.

6. The communication application system based on HPLC broadband power line carrier according to claim 1, wherein Based on historical data, obtain multiple high pedestrian flow time intervals [ai, bi] and medium pedestrian flow times [ci, di] for the same road section. Then, eliminate the abnormal intervals in [ai, bi] and [ci, di], and find the intersection of the remaining intervals. The comprehensive high pedestrian flow time is [a’, b’], the medium pedestrian flow time is [c’, d’], and the low pedestrian flow time is [tstart, tend] - [a’, b’] - [c’, d’].

7. The communication application system based on HPLC broadband power line carrier according to claim 2, characterized in that, Street lights that require additional power supply indicate that the solar power generation minus the power consumption during the time period [tstart, tend] is negative. Street lights that do not require additional power supply indicate that the solar power generation minus the power consumption during the time period [tstart, tend] is positive.

8. The communication application system based on HPLC broadband power line carrier according to claim 2, wherein Mark the initial moment when a street light that requires additional power supply needs additional power, and determine the power supply priority according to the initial moment. Select the nearest street light that does not require additional power supply as the power supply object. If the initial moments of street lights that require additional power supply are the same and the power supply object is the same, the power supply object preferentially selects the one that is closer for power supply.

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