CN118018032B - Remote control data transmission method of intelligent switch cabinet - Google Patents
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Abstract
The invention belongs to the technical field of data transmission, and particularly relates to a remote control data transmission method of an intelligent switch cabinet, which comprises the following steps: the method comprises the steps of converting an electrical parameter data sequence into a sequence to be encoded, determining initial codewords corresponding to all characters according to original frequency of all characters in the sequence to be encoded, encoding the 1 st subsequence to be encoded according to the initial codewords corresponding to all the characters, obtaining new codewords corresponding to all the characters according to all the subsequences to be encoded before the 1 st subsequence to be encoded, encoding the subsequences to be encoded according to the new codewords corresponding to all the characters, and forming and transmitting encoding results of all the subsequences to be encoded into encoding results of the sequence to be encoded. The invention improves the transmission efficiency by reducing the data volume, thereby improving the operation and management efficiency of the remote control system.
Description
Technical Field
The invention relates to the technical field of data transmission. More particularly, the invention relates to a remote control data transmission method of an intelligent switch cabinet.
Background
The intelligent switch cabinet is connected with a computer system of the central control room through a network communication interface of the intelligent switch cabinet, the intelligent switch cabinet transmits the collected electric parameter data such as voltage, current and frequency of each power supply and distribution loop to the central control room, and the computer system of the central control room detects and analyzes the received electric parameter data and realizes remote control of the switch cabinet based on analysis results.
Wherein, the transmission efficiency affects the efficiency of operation and management of the remote control system, and in order to improve the efficiency of operation and management of the remote control system, it is necessary to improve the transmission efficiency.
Disclosure of Invention
To solve one or more of the above-described technical problems, the present invention provides aspects as follows.
A remote control data transmission method of an intelligent switch cabinet comprises the following steps:
Collecting an electrical parameter data sequence of the intelligent switch cabinet;
Converting an electrical parameter data sequence into a sequence to be encoded, wherein the sequence to be encoded comprises a plurality of data to be encoded, and the same data to be encoded is used as a character;
for each character, determining the frequency of each interval length corresponding to the character according to the position of the character in the sequence to be coded;
determining initial code words corresponding to all characters according to the original frequency of all the characters in the sequence to be coded;
Dividing a sequence to be encoded into a plurality of subsequences to be encoded according to a preset length; coding each subsequence to be coded in turn according to the code word corresponding to each character;
when the 1 st subsequence to be coded is coded, the codeword corresponding to each character is an initial codeword; when coding other sub-sequences to be coded except the 1 st sub-sequence to be coded, the code word corresponding to each character is a new code word obtained according to all sub-sequences to be coded before the sub-sequence to be coded;
The new codeword obtained according to all sub-sequences to be encoded before the sub-sequence to be encoded includes: all the subsequences to be encoded in front of the subsequence to be encoded are formed into an encoded sequence, and the frequency number to be encoded of each character is determined according to the difference value between the original frequency number of each character in the sequence to be encoded and the frequency number of each character in the encoded sequence, the occurrence position of each character in the encoded sequence and the frequency number of each interval length corresponding to each character; according to the frequency number to be coded of each character, reassigning code words to each character to obtain new code words corresponding to each character;
the coding results of all the subsequences to be coded are formed into the coding results of the subsequences to be coded;
And transmitting the coding result of the sequence to be coded.
In one embodiment, the determining the frequency number of each interval length corresponding to the character according to the position of the character in the sequence to be encoded includes:
the position serial numbers of all the data to be coded corresponding to the character in the sequence to be coded are formed into the position serial number sequence of the character according to the sequence from small to large;
determining a first-order differential sequence of a position sequence number sequence of the character as an interval sequence of the character, wherein each first-order differential value in the first-order differential sequence is used as each interval length, and the first-order differential value is a difference value of two adjacent position sequence numbers in the position sequence number sequence;
The number of occurrences of each interval length in the interval sequence of the character is taken as the frequency number of each interval length in the character.
In one embodiment, the frequency to be encoded for each character satisfies the expression:
；
Wherein Y represents the frequency number to be encoded of the character, g represents the interval length, and g is taken over All integers within the range,/>Representing the minimum of all space lengths of a character,/>Representing the maximum of all interval lengths of a character,/>Representing the number of occurrences of a character in a search area corresponding to an interval length g,/>The frequency number of the character interval length g corresponding to the character is represented, C represents the length of the sequence to be encoded, exp () represents an exponential function based on a natural constant, P represents the original frequency number of the character in the sequence to be encoded, and Q represents the frequency number of the character in the encoded sequence.
In one embodiment, the search area corresponding to the interval length g is composed of encoded data with a position number within [ max (1, l+1-g), min (L, l+d-g) ] in the encoded sequence, where max () represents a function taking a maximum value, min () represents a function taking a minimum value, L represents the length of the encoded sequence, g represents the interval length, and D represents a preset length.
In one embodiment, the reassigning the codeword to each character according to the frequency number to be encoded of each character to obtain a new codeword corresponding to each character includes:
and sequentially distributing each codeword in the initial codeword sequence to each character according to the sequence from big frequency to small frequency to be coded, and taking the codeword as a new codeword corresponding to each character.
In one embodiment, the initial codeword sequence is formed by arranging initial codewords corresponding to all characters according to the order of the original frequency number from large to small.
In one embodiment, the determining the initial codeword corresponding to each character according to the original frequency of all the characters in the sequence to be encoded includes:
constructing a Huffman tree according to the original frequency of all characters in the sequence to be coded;
Determining a Huffman coding table according to the constructed Huffman tree; the Huffman coding table comprises initial code words corresponding to all characters.
In one embodiment, the converting the electrical parameter data sequence into the sequence to be encoded includes:
all digits, decimal points and separators of each electric parameter data in the electric parameter data sequence are used as data to be encoded, and all the data to be encoded form a sequence to be encoded.
The invention has the beneficial effects that: the invention determines initial code words corresponding to all characters in a sequence to be encoded, encodes a1 st subsequence to be encoded according to the initial code words corresponding to all characters, forms all subsequences to be encoded in front of the 1 st subsequence to be encoded into an encoded sequence according to the original frequency of all characters in the sequence to be encoded and the difference value of the frequency of all characters in the encoded sequence, the occurrence position of all characters in the encoded sequence and the frequency of each interval length corresponding to all characters, determines the frequency of all the characters to be encoded, re-distributes code words to all the characters according to the frequency of all the characters to be encoded, obtains new code words corresponding to all the characters, and encodes the subsequences to be encoded according to the new code words corresponding to all the characters; the method solves the problems that in the encoding process, as the data to be encoded is reduced, the frequency of each character in the rest data to be encoded is changed greatly compared with the original frequency of each character, so that the final encoding result of the sequence to be encoded is longer, and the compression rate of the sequence to be encoded is influenced, improves the compression rate of the sequence to be encoded, improves the transmission efficiency by reducing the data quantity, and further improves the operation and management efficiency of a remote control system.
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The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the invention are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:
fig. 1 schematically shows a flow chart of a method for remote control data transmission of an intelligent switch cabinet according to the invention;
FIG. 2 schematically illustrates a schematic diagram of an initial codeword corresponding to each character;
Fig. 3 schematically shows a schematic diagram of a new codeword corresponding to each character.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The embodiment of the invention discloses a remote control data transmission method of an intelligent switch cabinet, which comprises the following steps of S1-S4 with reference to FIG. 1:
s1, acquiring an electrical parameter data sequence of the intelligent switch cabinet, and converting the electrical parameter data sequence into a sequence to be encoded.
The computer system of the central control room realizes remote control of the switch cabinet based on the analysis result of the received electrical parameter data; in order to improve the efficiency of operation and management of a remote control system, it is necessary to improve transmission efficiency. The transmission efficiency depends on the amount of data transmitted, and therefore, in order to improve the transmission efficiency, it is necessary to compress the acquired electrical parameter data sequence of the intelligent switch cabinet.
Specifically, in the working state of the intelligent switch cabinet, acquiring electric parameter data by each set sensor, wherein the electric parameter data comprise current, voltage, frequency, temperature and humidity; wherein, the sampling frequency of the electrical parameter data is 2 seconds/time, and the sampling period is 5 minutes; and taking the sequence formed by the electric parameter data at each acquisition time according to the time sequence as an electric parameter data sequence of the intelligent switch cabinet.
Wherein, the electric current is gathered through the current sensor, and voltage is gathered through voltage sensor, and the frequency is gathered through the sweep generator, and the temperature is gathered through temperature sensor, and humidity is gathered through humidity transducer.
For example, the collected electrical parameter data sequence of the intelligent switch cabinet is {175, 220, 300, 42.3, 70.4, …, 50.9, 63.5}; wherein, the units of current, voltage, frequency, temperature and humidity are A (an), V (volt), HZ (hertz), C (degrees Celsius) and% RH (relative humidity), respectively.
Further, all digits, decimal points and separators of each electric parameter data in the electric parameter data sequence are used as one piece of data to be encoded, all pieces of data to be encoded are formed into a sequence to be encoded, the same data to be encoded in the sequence to be encoded is used as one character, and then the sequence to be encoded comprises 12 characters including numbers, decimal points, separators and the like from 0 to 9.
Illustratively, the electrical parameter data sequence {175, 220, 300, 42.3, 70.4, …, 50.9, 63.5} is converted into a sequence to be encoded, the sequence to be encoded is obtained {"1","7","5","、","2","2","0","、","3","0","0","、","4","2",".","3","、","7","0",".","4","、",…,"、","5","0",".","9","、","6","3",".","5"}.
According to the sequence from left to right, the position serial numbers of the data to be coded in the sequence to be coded are [1, C ] in sequence, and C represents the length of the sequence to be coded, namely the quantity of all the data to be coded contained in the sequence to be coded.
S2, determining initial code words corresponding to all the characters according to the original frequency of all the characters in the sequence to be coded.
Specifically, according to the original frequency of all characters in the sequence to be coded, determining an initial codeword corresponding to each character, including: constructing a Huffman tree according to the original frequency of each character in the sequence to be coded, and determining a Huffman coding table according to the constructed Huffman tree; the Huffman coding table comprises initial code words corresponding to all characters, and the initial code words corresponding to all the characters are arranged according to the sequence from big to small of the original frequency to form an initial code word sequence; the initial codeword is a binary number consisting of 0 and 1.
The original frequency of the character in the sequence to be encoded refers to the number of times the character appears in the sequence to be encoded.
It should be noted that, the construction of the huffman tree according to the frequency number and the determination of the huffman coding table according to the huffman tree are all well known steps in the huffman coding, and the huffman coding is a well known technique, and will not be described herein.
For example, please refer to fig. 2, which shows a schematic diagram of an initial codeword corresponding to each character, wherein the codeword of the character "0" is "110", and the codeword length is 3; the characters ' are ' 00 ' and the length of the code word is 2; the codeword of the character "2" is "011", and the codeword length is 3; the codeword of the character "3" is "1111" and the codeword length is 4; the codeword of the character "5" is "0101", and the codeword length is 4; the codeword for character "7" is "11100" and the codeword length is 5.
S3, coding the 1 st subsequence to be coded according to the initial code word corresponding to each character, obtaining new code words corresponding to each character according to all subsequences to be coded before the 1 st subsequence to be coded, coding the subsequences to be coded according to the new code words corresponding to each character, and forming the coding results of all subsequences to be coded into the coding results of the subsequences to be coded.
It should be noted that huffman coding is a conventional compression method based on frequency, and compression is achieved by assigning a codeword with a shorter length to a character with a larger initial frequency and assigning a codeword with a longer length to a character with a smaller initial frequency; in the process of encoding the data to be encoded in the sequence to be encoded according to the code words of each character, as the data to be encoded is reduced, the frequency number of each character in the remaining data to be encoded is changed greatly compared with the original frequency number of each character, which may result in that the frequency number of the character with the larger initial frequency number in the remaining data to be encoded is smaller, and the frequency number of the character with the smaller initial frequency number in the remaining data to be encoded is larger, at this time, if the code words allocated to each character based on the initial frequency number are still adopted to encode the remaining data to be encoded, the encoding result of the data to be encoded corresponding to the character with the smaller frequency number in the remaining data to be encoded is shorter, and the encoding result of the data to be encoded corresponding to the character with the larger frequency number in the remaining data to be encoded is longer, which may further result in that the final encoding result of the sequence to be encoded is longer, which may affect the compression rate of the sequence to be encoded, thereby affecting the transmission efficiency, and resulting in lower efficiency of operation and management of the remote control system.
It should be further noted that, in order to improve transmission efficiency, it is necessary to shorten the final encoding result of the sequence to be encoded; in the process of coding, the frequency number of each character in the rest data to be coded is changed compared with the original frequency number of each character along with the reduction of the data to be coded, so that in the process of coding the subsequence to be coded, the frequency number to be coded of each character is determined according to the difference value between the original frequency number of each character in the sequence to be coded and the coded frequency number of each character in the coded sequence and the frequency number of each interval length in each character, the code word is allocated to each character again according to the frequency number to be coded of each character, the subsequence to be coded is coded according to the new code word of each character, the code word with shorter length is always allocated to the character with larger frequency number, and the code word with longer length is allocated to the character with smaller frequency number, so that the final coding result of the sequence to be coded is ensured to be shorter, the compression rate of the sequence to be coded is improved, and the transmission efficiency is further improved.
Specifically, dividing a sequence to be encoded into a plurality of subsequences to be encoded according to a preset length, and sequentially encoding each subsequence to be encoded according to code words corresponding to each character; when the 1 st subsequence to be coded is coded, the codeword corresponding to each character is an initial codeword; when coding other sub-sequences to be coded except the 1 st sub-sequence to be coded, the code word corresponding to each character is a new code word obtained according to all sub-sequences to be coded before the sub-sequence to be coded.
The new codeword obtained according to all sub-sequences to be encoded before the sub-sequence to be encoded includes: all sub-sequences to be coded in front of the sub-sequence to be coded form a coded sequence, wherein the coded sequence comprises a plurality of coded data; determining the frequency number to be coded of each character according to the difference value between the original frequency number of each character in the sequence to be coded and the frequency number of each character in the coded sequence, the occurrence position of each character in the coded sequence and the frequency number of each interval length corresponding to each character; and according to the frequency number to be encoded of each character, reassigning the code word to each character to obtain a new code word corresponding to each character.
For each character, determining the frequency of each interval length corresponding to the character according to the position of the character in the sequence to be coded, including: the position serial numbers of the data to be coded corresponding to the characters in the sequence to be coded form a position serial number sequence of the characters according to the sequence from small to large; determining a first-order differential sequence of the position sequence number sequence of the character as an interval sequence of the character; wherein each first-order differential value in the first-order differential sequence is used as each interval length; the first-order differential value is the difference value of two adjacent position serial numbers in the position serial number sequence; the number of occurrences of each interval length in the interval sequence of the character is taken as the frequency number of each interval length in the character.
The frequency to be encoded of each character satisfies the expression:
；
Wherein Y represents the frequency number to be encoded of the character, g represents the interval length, and g is taken over All integers within the range,/>Representing the minimum of all space lengths of a character,/>Representing the maximum of all interval lengths of a character,/>Representing the number of occurrences of a character in a search area corresponding to an interval length g,/>The frequency number of the character interval length g corresponding to the character is represented, C represents the length of the sequence to be encoded, exp () represents an exponential function based on a natural constant, P represents the original frequency number of the character in the sequence to be encoded, and Q represents the frequency number of the character in the encoded sequence.
It should be noted that the number of the substrates,According to the frequency of the occurrence of the character in the search area corresponding to the interval length g and the frequency of the character interval length g corresponding to the character, the probability of the occurrence of the character in the next subsequence to be encoded, which needs to be encoded, is determined, the larger the value is, the more likely the character is in the next subsequence to be encoded, the larger the frequency Y to be encoded of the character is; /(I)For/>Normalizing; difference/>, of original frequency number of characters in sequence to be encoded and frequency number in encoded sequenceRepresenting the number of occurrences of the character in all the uncoded sub-sequences to be coded, the larger the value, the more likely the character is in the next sub-sequence to be coded, the larger the frequency Y to be coded of the character.
The search area corresponding to the interval length g is composed of encoded data with the position sequence number within the range of [ max (1, L+1-g), min (L, L+D-g) ] in the encoded sequence, so that the search area corresponding to the interval length g is actually a part of the encoded sequence; wherein, max () represents taking a maximum function, min () represents taking a minimum function, L represents the length of the encoded sequence, i.e., the number of all encoded data contained in the encoded sequence, g represents the interval length, and D represents the preset length.
The specific value of the preset length can be set according to the actual application scene and the requirement, and the length is set to be 30.
And re-distributing code words to the characters according to the frequency numbers to be coded of the characters to obtain new code words corresponding to the characters, wherein the method comprises the following steps: and sequentially distributing each codeword in the initial codeword sequence to each character according to the sequence from big frequency to small frequency to be coded, and taking the codeword as a new codeword corresponding to each character.
For example, referring to fig. 3, a schematic diagram of a new codeword corresponding to each character is shown, wherein the codeword of the character "0" is changed from "110" to "00", and the codeword length is changed from 3 to 2; the characters ' the code word is changed from ' 00 ' to ' 110 ', and the length of the code word is changed from 2 to 3; the codeword of the character "2" is changed from "011" to "1011", and the codeword length is changed from 3 to 4; the codeword of the character "3" is changed from "1111" to "011", and the codeword length is changed from 4 to 3; the codeword of the character "5" is changed from "0101" to "11100", and the codeword length is changed from 4 to 5; the codeword of the character "7" is changed from "11100" to "0100", and the codeword length is changed from 5 to 4.
Further, the coding results of all the sub-sequences to be coded are formed into the coding results of the sequences to be coded.
It should be noted that the invention overcomes the problem that in the encoding process, as the data to be encoded is reduced, the frequency of each character in the rest data to be encoded is changed greatly compared with the original frequency of each character, resulting in a longer final encoding result of the sequence to be encoded and affecting the compression rate of the sequence to be encoded, improves the transmission efficiency by reducing the data volume, and further improves the operation and management efficiency of a remote control system.
S4, transmitting the coding result of the sequence to be coded.
Specifically, the coding result of the sequence to be coded is the compression result of the electrical parameter data sequence of the intelligent switch cabinet; the intelligent switch cabinet is connected with a computer system of the central control room through a network communication interface of the intelligent switch cabinet, and the intelligent switch cabinet transmits a compression result of an electric parameter data sequence of the intelligent switch cabinet to the central control room; and the computer system of the central control room detects and analyzes the received electrical parameter data, and realizes remote control of the switch cabinet based on analysis results.
In the description of the present specification, the meaning of "a plurality", "a number" or "a plurality" is at least two, for example, two, three or more, etc., unless explicitly defined otherwise.
While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Many modifications, changes, and substitutions will now occur to those skilled in the art without departing from the spirit and scope of the invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention.
Claims (5)
1. The remote control data transmission method of the intelligent switch cabinet is characterized by comprising the following steps of:
Collecting an electrical parameter data sequence of the intelligent switch cabinet;
Converting an electrical parameter data sequence into a sequence to be encoded, wherein the sequence to be encoded comprises a plurality of data to be encoded, and the same data to be encoded is used as a character;
for each character, determining the frequency of each interval length corresponding to the character according to the position of the character in the sequence to be coded;
determining initial code words corresponding to all characters according to the original frequency of all the characters in the sequence to be coded;
Dividing a sequence to be encoded into a plurality of subsequences to be encoded according to a preset length; coding each subsequence to be coded in turn according to the code word corresponding to each character;
when the 1 st subsequence to be coded is coded, the codeword corresponding to each character is an initial codeword; when coding other sub-sequences to be coded except the 1 st sub-sequence to be coded, the code word corresponding to each character is a new code word obtained according to all sub-sequences to be coded before the sub-sequence to be coded;
The new codeword obtained according to all sub-sequences to be encoded before the sub-sequence to be encoded includes: all the subsequences to be encoded in front of the subsequence to be encoded are formed into an encoded sequence, and the frequency number to be encoded of each character is determined according to the difference value between the original frequency number of each character in the sequence to be encoded and the frequency number of each character in the encoded sequence, the occurrence position of each character in the encoded sequence and the frequency number of each interval length corresponding to each character; according to the frequency number to be coded of each character, reassigning code words to each character to obtain new code words corresponding to each character;
the coding results of all the subsequences to be coded are formed into the coding results of the subsequences to be coded;
transmitting a coding result of a sequence to be coded;
The step of determining the frequency number of each interval length corresponding to the character according to the position of the character in the sequence to be encoded, comprising:
the position serial numbers of all the data to be coded corresponding to the character in the sequence to be coded are formed into the position serial number sequence of the character according to the sequence from small to large;
determining a first-order differential sequence of a position sequence number sequence of the character as an interval sequence of the character, wherein each first-order differential value in the first-order differential sequence is used as each interval length, and the first-order differential value is a difference value of two adjacent position sequence numbers in the position sequence number sequence;
the frequency of each interval length in the character is used as the frequency of each interval length in the character;
The frequency to be encoded of each character satisfies the expression:
；
Wherein Y represents the frequency number to be encoded of the character, g represents the interval length, and g is taken over All integers within the range,/>Representing the minimum of all space lengths of a character,/>Representing the maximum of all interval lengths of a character,/>Representing the number of occurrences of a character in a search area corresponding to an interval length g,/>The frequency number of the character interval length g corresponding to the character is represented, C represents the length of the sequence to be encoded, exp () represents an exponential function based on a natural constant, P represents the original frequency number of the character in the sequence to be encoded, and Q represents the frequency number of the character in the encoded sequence;
The search area corresponding to the interval length g is composed of coded data with position numbers within a range of [ max (1, L+1-g), min (L, L+D-g) ] in the coded sequence, wherein max () represents a maximum function, min () represents a minimum function, L represents the length of the coded sequence, g represents the interval length, and D represents a preset length.
2. The method for remotely controlling data transmission of an intelligent switch cabinet according to claim 1, wherein reassigning codewords to each character according to the frequency number to be encoded of each character to obtain new codewords corresponding to each character comprises:
and sequentially distributing each codeword in the initial codeword sequence to each character according to the sequence from big frequency to small frequency to be coded, and taking the codeword as a new codeword corresponding to each character.
3. The method for remotely controlling data transmission of an intelligent switch cabinet according to claim 2, wherein the initial codeword sequence is formed by arranging initial codewords corresponding to all characters in the order of the original frequency from high to low.
4. The method for remotely controlling data transmission of an intelligent switch cabinet according to claim 1, wherein determining an initial codeword corresponding to each character according to an original frequency of all characters in a sequence to be encoded comprises:
constructing a Huffman tree according to the original frequency of all characters in the sequence to be coded;
Determining a Huffman coding table according to the constructed Huffman tree; the Huffman coding table comprises initial code words corresponding to all characters.
5. The method for remotely controlling data transmission of an intelligent switch cabinet according to claim 1, wherein said converting the electrical parameter data sequence into a sequence to be encoded comprises:
all digits, decimal points and separators of each electric parameter data in the electric parameter data sequence are used as data to be encoded, and all the data to be encoded form a sequence to be encoded.
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