CN105575234B - A kind of coding comparison method of circuit diagram feature string - Google Patents
A kind of coding comparison method of circuit diagram feature string Download PDFInfo
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- CN105575234B CN105575234B CN201610033356.4A CN201610033356A CN105575234B CN 105575234 B CN105575234 B CN 105575234B CN 201610033356 A CN201610033356 A CN 201610033356A CN 105575234 B CN105575234 B CN 105575234B
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- G—PHYSICS
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- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/183—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
Abstract
The present invention provides a kind of coding comparison methods of circuit diagram feature string, including pin characteristic character string encoding, branch is equivalent, node diagnostic string encoding, circuit diagram characteristic character string encoding, compares five steps, it is by setting coding and ordering rule, two-dimensional circuit figure is hinted obliquely at into one-dimensional character string, and the one-dimensional character string of gained is defined as circuit diagram feature string；By the circuit diagram feature string for extracting, comparing two circuits, it can determine whether two circuits are consistent, if the circuit diagram feature string of two circuits is completely the same, it is same circuit to show two circuit diagrams, otherwise, two circuits are shown as different circuits, therefore, this coding method can be used for Analog Circuit Design exercise system, realize preferred circuit and the comparison of circuit designed by student.
Description
Technical field
The present invention relates to a kind of coding comparison methods of circuit diagram, are specifically a kind of encoding ratio of circuit diagram feature string
To method, belong to electronic technology and field of computer technology.
Background technology
Analog electronics technique is one of electronic information, communication and the most important technical foundation course of Electric Specialty, purport
In training student to the analysis ability and designed capacity of typical simulation circuit.Training for analysis ability, it is relatively easy to realize,
And for the training of designed capacity, then it realizes relatively difficult.Main reason is that teaching material and its mating exercise system provided
Exercise is mostly circuit analysis topic, almost without circuit design topic, thus, student's peacetime training is mostly to carry out circuit analysis
Training, seldom carry out circuit design practice.In order to which training student is to the designed capacity of typical simulation circuit, it is necessary to develop
One Analog Circuit Design exercise system is supplied to student to make circuit design practice and is used.
In the development process of Analog Circuit Design exercise system, facing maximum technical difficulty is：How to drawn by student
Circuit diagram be compared with the preferred circuit figure that system provides, so as to differentiate circuit designed by student to mistake.
Two elements of circuit diagram implicator：Circuit topography and circuit parameter.Circuit topography refers to circuit element and its electricity
Gas connection relation, circuit parameter refer to the parameter value of circuit element.The different circuit diagram of figure, if implicit circuit topography and circuit
Parameter is consistent, then substantially same circuit, and simply the form of expression is different, conversely, being then different circuits.If manually compare electricity
Lu Tu is easier to realize, because human brain may filter that the interference on circuit diagram form, the only circuit topography of absorbed Comparison Circuit figure
It is whether consistent with circuit parameter；If computer program is allowed to complete to compare, it is necessary to design a suitable data structure, it is used to store
The circuit topography and circuit parameter extracted from circuit diagram then by comparison data structure, is completed circuit diagram and is compared.And on mould
Intend the coding comparison technology of circuit figure, the country yet there are no pertinent literature report.
The content of the invention
To solve the above-mentioned problems, the present invention proposes a kind of coding comparison method of circuit diagram feature string, the party
Method can be applied to Analog Circuit Design exercise system, realize preferred circuit and the comparison of circuit designed by student.
The present invention technical thought be：Setting coding and ordering rule, hint obliquely at into one-dimensional character string by two-dimensional circuit figure,
And the one-dimensional character string of gained is defined as circuit diagram feature string；By the circuit diagram characteristic character for extracting, comparing two circuits
String, can determine whether two circuits are consistent, if the circuit diagram feature string of two circuits is completely the same, it is same to show two circuit diagrams
Circuit, otherwise, it is different circuits to show two circuits.
The technical solution adopted in the present invention is：
A kind of coding comparison method of circuit diagram feature string, comprises the following steps：
（1）Pin characteristic character string encoding：All elements in circuit diagram are traveled through, each element each is drawn
Foot generates pin feature string by pin feature string coding rule；
（2）Branch is equivalent：To including each branch of two or more elements in circuit diagram, respectively with one
Empty element is equivalent to the element progress in branch, then generates each void respectively by empty component pin feature string coding method
The pin feature string of element；
（3）Node diagnostic string encoding：All nodes in circuit diagram are traveled through, to each node, by the member of its connection
The pin feature string of part pin forms a character trail, then by character string sorting rule to the character string of this character trail
It is ranked up, finally all character strings that this character trail has sorted is stringed together from the beginning to the end, the node for forming this node is special
Levy character string；
（4）Circuit diagram characteristic character string encoding：One character trail is formed by the node diagnostic character string of whole nodes, then
The character string of this character trail is ranked up by character string sorting rule, all characters that finally this character trail has been sorted
String strings together from the beginning to the end, forms circuit diagram feature string；
（5）It compares：By step（1）-（4）Method extract the circuit diagram feature strings of two circuits respectively and be compared,
If the circuit diagram feature string of two circuits is completely the same, show two circuit diagrams as same circuit, otherwise, show two circuits for not
Same circuit.
Step（1）The pin feature string coding rule is：
Pin feature string=element names+[component parameters]+[pin name]
Wherein, element names are to the type of marker elements, and such as " R ", " LED ", " C ", " OPA " are respectively resistance, luminous two
The component type mark of pole pipe, capacitance and amplifier；[component parameters] to be marked with the parameter value of the element of parameter value, such as
" 100K ", " 10uF " represent resistance and capacitance respectively, this is options, and for the element of printenv, this can
It omits；[pin name] to be marked with the pin name of pole element, such as " P " and " N " marks anode respectively（Or normal phase input end）
And cathode（Or inverting input）, " b ", " c ", " e " mark base stage, the collector and emitter of triode respectively, this is choosing
Item is selected, for electrodeless element, such as resistance, this can be omitted.
Step（2）The empty component pin feature string coding method comprises the following steps：
1）For the random one end pin for setting empty element as positive pin, other end pin is negative pin, and positive pin is directed toward negative draw
Foot direction is set to order direction；
2）Direction in order, from form the pin feature string of each element of empty element form pin feature string to
Amount；
3）The odd number component for extracting pin feature string vector forms a character trail, then by character string sorting rule
The character string of this character trail is ranked up, finally all character strings that this character trail has sorted are strung from the beginning to the end
Come, form the positive pin feature string of empty element；
4）The even numbers component of extraction pin feature string vector forms another character trail, then is advised by character string sorting
Then the character string of this character trail is ranked up, finally all character strings that this character trail has sorted are strung from the beginning to the end
Come, form the negative pin feature string of empty element.
Step（3）And step（4）The character string sorting rule is：
It sorts by the length of character string, long character string is preceding, and short character strings are rear；If two string lengths are identical, according to
The ASCII character value of each character of secondary two character string of comparison, until the ASCII character value of a certain position character of two character strings differs, so
Before the big character string of ASCII character value is come afterwards.
The coding comparison method of the circuit diagram feature string of the present invention can be used for Analog Circuit Design exercise system, realize
Preferred circuit and the comparison of circuit designed by student.Contain standard analog circuit in Analog Circuit Design exercise system, during practice,
Exercise system deletes the connecting line between standard circuit elements, only retains element, and the placing direction element and placement position
Again it is randomly provided；Student puts element and addition connecting line again according to the design requirement of topic；After student's complete design,
The coding comparison method of system circuit diagram feature string according to the present invention passes through extraction, standard of comparison circuit diagram and student
Designed circuit diagram feature string, judge circuit designed by student to mistake.
Description of the drawings
Standard LED drive circuit built in Fig. 1 exercise systems.
The LED drive circuit example 1 of Fig. 2 student's design.
The LED drive circuit example 2 of Fig. 3 student's design.
10 times of alternating voltage reverse phase proportional amplifiers of standard built in Fig. 4 exercise systems.
10 times of alternating voltage reverse phase proportional amplifier examples 1 of Fig. 5 student's design.
10 times of alternating voltage reverse phase proportional amplifier examples 2 of Fig. 6 student's design.
Specific embodiment
Embodiment one：It is that the application of the present invention is described in detail with reference to Fig. 1~Fig. 3 below.
Fig. 1 is the standard LED drive circuit built in Analog Circuit Design exercise system, and during practice, exercise system deletes electricity
Connecting line between circuit component only retains element, and element placing direction and placement position is randomly provided again；Student is according to topic
Purpose design requirement, puts element and addition connecting line again, and Fig. 2 and Fig. 3 are respectively the design example that different students complete.
The coding step of Fig. 1 circuit diagram feature strings is as follows：
（1）Pin characteristic character string encoding：All elements in circuit diagram are traveled through, each element each is drawn
Foot generates pin feature string, as shown in table 1 by pin feature string coding rule.
Table 1：The pin feature string list of the element of Fig. 1 circuits
（2）Branch is equivalent：To including each branch of two or more elements in circuit diagram, respectively with one
Empty element is equivalent to the element progress in branch, then generates each void respectively by empty component pin feature string coding method
The pin feature string of element.
Branch includes two elements where the D1 and R2 of Fig. 1 circuits, an empty element need to be used to carry out equivalent, then press void element
Pin feature string coding method generates the sign character string such as pin of this empty element, and process is as follows：
1）Pin that empty element connects Q1 collectors is set as positive pin, connects the pin of+5V power ends to bear pin, positive pin
It is directed toward negative pin direction and is set to order direction；
2）Direction in order forms pin characteristic character by forming the pin feature string of element D1, R2 of empty element
String vector（" LEDN ", " LEDP ", " R100 ", " R100 "）；
3）The odd number component composition character trail { " LEDN ", " R100 " } of this pin feature string vector is extracted, then is pressed
Character string sorting rule is ranked up the character string of this character trail, { " R100 ", " LEDN " } is obtained, finally this character trail
All character strings to have sorted are stringed together from the beginning to the end with "/", form the positive pin feature string " R100/ of empty element
LEDN”；
4）The even numbers component composition character trail { " LEDP ", " R100 " } of this pin feature string vector is extracted, then is pressed
Character string sorting rule is ranked up the character string of this character trail, { " R100 ", " LEDP " } is obtained, finally this character trail
All character strings to have sorted are stringed together from the beginning to the end with "/", form the negative pin feature string " R100/ of empty element
LEDP”。
（3）Node diagnostic string encoding：All nodes in circuit diagram are traveled through, to each node, by the member of its connection
The pin feature string of part pin forms a character trail, then by character string sorting rule to the character string of this character trail
It is ranked up, finally all character strings that this character trail has sorted is stringed together from the beginning to the end, the node for forming this node is special
Levy character string.
Such as the node that Q1 base stages are connected with resistance R1, the pin characteristic character trail of composition is { " NPNb ", " R10K " },
It resequences by character string sorting rule to this character trail, { " R10K ", " NPNb " } is obtained, by all characters of this character trail
String "-" number strings together, and obtains the node diagnostic character string " R10K-NPNb " of this node.
Node for example where Q1 collectors again, is also connected with by the positive pin of R2 and the D2 empty element formed, composition draws
Foot characteristic character trail is { " NPNc ", " R100/LEDN " }, resequences, obtains to this character trail by character string sorting rule
All character string "-" number of this character trail are stringed together, obtain the node diagnostic of this node by { " R100/LEDN ", " NPNc " }
Character string " R100/LEDN-NPNc ".
The node diagnostic character string of whole nodes of Fig. 1 circuits is as shown in table 2.
Table 2：The node diagnostic character string list of Fig. 1 circuits
（4）Circuit diagram characteristic character string encoding：One character trail is formed by the node diagnostic character string of whole nodes, then
The character string of this character trail is ranked up by character string sorting rule, all characters that finally this character trail has been sorted
String is stringed together from the beginning to the end with " ＆ ", forms circuit diagram feature string.
Fig. 1 circuit diagram whole nodes node diagnostic character string composition character trail be
{ " R10K-NPNb ", " R100/LEDN-NPNc ", " NPNe-GND ", " R10K-Vi ", " R100/LEDP-VCC5V " }
By character string sorting rule, resequence, obtain to this character trail
{ " R100/LEDP-VCC5V ", " R100/LEDN-NPNc ", " R10K-NPNb ", " NPNe-GND ", " R10K-Vi " }
All character strings of this character trail with ampersand are stringed together, obtain Fig. 1 circuit diagram feature strings
CPS1=“R100/LEDP-VCC5V&R100/LEDN-NPNc&R10K-NPNb&NPNe-GND&R10K-Vi”
To Fig. 2 circuit diagrams, same method can obtain its circuit diagram feature string
CPS2=“R100/LEDP-VCC5V&R100/LEDN-NPNc&R10K-NPNb&NPNe-GND&R10K-Vi”
To Fig. 3 circuit diagrams, same method can obtain its circuit diagram feature string
CPS3=“R10K/LEDP-VCC5V&R10K/LEDN-NPNc&R100-NPNb&NPNe-GND&R100-Vi”
（5）It compares：Compare CPS1And CPS2, the two is identical, shows that two circuits are completely the same, can determine that circuit diagram 2 designs just
Really；Compare CPS1And CPS3, the two differs, and shows two circuit diagrams difference, can determine that 3 design mistake of circuit diagram.
Embodiment two：It is that the application of the present invention is illustrated again with reference to Fig. 4~Fig. 6 below.
Fig. 4 is 10 times of alternating voltage reverse phase proportional amplifiers of standard built in Analog Circuit Design exercise system, during practice,
Exercise system deletes the connecting line between circuit element, only retains element, and element placing direction and placement position is again random
It sets；Student puts element and addition connecting line, Fig. 5 and Fig. 6 are respectively that different students are complete again according to the design requirement of topic
Into design example.
The coding step of Fig. 4 circuit diagram feature strings is as follows：
（1）Pin characteristic character string encoding：All elements in circuit diagram are traveled through, each element each is drawn
Foot generates pin feature string, as shown in table 3 by pin feature string coding rule.
Table 3：The pin feature string list of the element of Fig. 4 circuits
（2）Branch is equivalent：To including each branch of two or more elements in circuit diagram, respectively with one
Empty element is equivalent to the element progress in branch, then generates each void respectively by empty component pin feature string coding method
The pin feature string of element.
Branch includes two elements where the C1 and R1 of Fig. 4 circuits, an empty element need to be used to carry out equivalent, then press void element
Pin feature string coding method generates the sign character string such as pin of this empty element, and process is as follows：
1）Pin that empty element meets input terminal Vi1 is set as positive pin, the pin of amplifier U1 inverting inputs is connect and draws to bear
Foot, positive pin are directed toward negative pin direction and are set to order direction；
2）Direction in order forms pin characteristic character by forming the pin feature string of element C1, R1 of empty element
String vector（" C1uF ", " C1uF ", " R1K ", " R1K "）；
3）The odd number component composition character trail { " C1uF ", " R1K " } of this pin feature string vector is extracted, then by word
Symbol string sorting rule is ranked up the character string of this character trail, obtains { " C1uF ", " R1K " }, and finally this character trail is arranged
The good all character strings of sequence are stringed together from the beginning to the end with "/", form the positive pin feature string " C1uF/R1K " of empty element；
4）The even numbers component composition character trail { " C1uF ", " R1K " } of pin feature string vector is extracted, then by character
String sorting rule is ranked up the character string of this character trail, obtains { " C1uF ", " R1K " }, and finally this character trail is sorted
Good all character strings are stringed together from the beginning to the end with "/", form the negative pin feature string " C1uF/R1K " of empty element.
（3）Node diagnostic string encoding：All nodes in circuit diagram are traveled through, to each node, by the member of its connection
The pin feature string of part pin forms a character trail, then by character string sorting rule to the character string of this character trail
It is ranked up, finally all character strings that this character trail has sorted is stringed together from the beginning to the end, the node for forming this node is special
Levy character string.
Such as node where U1 inverting inputs, it connects by the negative pin and R2 of C1 and the R1 empty element formed, composition
Pin characteristic character trail is { " OPAN ", " C1uF/R1K ", " R10K " }, by character string sorting rule, to this character trail weight
New sort obtains { " C1uF/R1K ", " R10K ", " OPAN " }, by this character trail institute it is important stringed together with "-" number, obtain this
The node diagnostic character string " C1uF/R1K-R10K-OPAN " of node.
The node diagnostic character string of whole nodes of Fig. 4 circuits is as shown in table 4.
Table 4：The node diagnostic character string list of Fig. 4 circuits
（4）Circuit diagram characteristic character string encoding：One character trail is formed by the node diagnostic character string of whole nodes, then
The character string of this character trail is ranked up by character string sorting rule, all characters that finally this character trail has been sorted
String is stringed together from the beginning to the end with " ＆ ", forms circuit diagram feature string.
Fig. 4 circuit diagram whole nodes node diagnostic character string composition character trail be
{ " C1uF/R1K-R10K-OPAN ", " OPAP-GND ", " R10K-OPAO-Vo ", " C1uF/R1K-Vi " }
By character string sorting rule, resequence, obtain to this character trail
{ " C1uF/R1K-R10K-OPAN ", " R10K-OPAO-Vo ", " C1uF/R1K-Vi ", " OPAP-GND " }
All character strings of this character trail with ampersand are stringed together, obtain Fig. 4 circuit diagram feature strings
CPS4=“C1uF/R1K-R10K-OPAN&R10K-OPAO-Vo&C1uF/R1K-Vi&OPAP-GND”
To Fig. 5 circuit diagrams, same method can obtain its circuit diagram feature string
CPS5=“C1uF/R1K-R10K-OPAN&R10K-OPAO-Vo&C1uF/R1K-Vi&OPAP-GND”
To Fig. 6 circuit diagrams, same method can obtain its circuit diagram feature string
CPS6=“R10K/C1uF-OPAO&R10K/C1uF-OPAO&OPAP-GND&R1K-Vi”
（5）It compares：Compare CPS4And CPS5, the two is identical, shows that two circuits are completely the same, can determine that circuit diagram 5 designs just
Really；Compare CPS4And CPS6, the two differs, and shows two circuit diagrams difference, can determine that 6 design mistake of circuit diagram.
Claims (1)
1. a kind of coding comparison method of circuit diagram feature string, which is characterized in that comprise the following steps：
（1）Pin characteristic character string encoding：All elements in circuit diagram are traveled through, to each pin of each element, are pressed
Pin feature string coding rule generates pin feature string；
（2）Branch is equivalent：To including each branch of more than two elements in circuit diagram, respectively with an empty element to branch
Element progress in road is equivalent, then generates the pin of each empty element respectively by empty component pin feature string coding method
Feature string；
（3）Node diagnostic string encoding：All nodes in circuit diagram are traveled through, to each node, are drawn by the element of its connection
The pin feature string of foot forms a character trail, then the character string of this character trail is carried out by character string sorting rule
Sequence, finally from the beginning to the end strings together all character strings that this character trail has sorted, forms the node diagnostic word of this node
Symbol string；
（4）Circuit diagram characteristic character string encoding：One character trail is formed by the node diagnostic character string of whole nodes, then by word
Symbol string sorting rule the character string of this character trail is ranked up, finally all character strings that this character trail has sorted from
Head is stringed together to tail, forms circuit diagram feature string；
（5）It compares：By step（1）-（4）Method extract the circuit diagram feature strings of two circuits respectively and be compared, if two
The circuit diagram feature string of circuit is completely the same, shows two circuit diagrams as same circuit, and otherwise, it is different to show two circuits
Circuit；
The step（1）The pin feature string coding rule is：
Pin feature string=element names+[component parameters]+[pin name]
Wherein, element names to marker elements type, [component parameters] to be marked with the parameter value of the element of parameter value,
[pin name] is being marked with the pin name of pole element；
The step（2）The empty component pin feature string coding method comprises the following steps：
1）For the random one end pin for setting empty element as positive pin, other end pin is negative pin, and positive pin is directed toward negative pin side
To being set to order direction；
2）Direction in order forms pin feature string vector by forming the pin feature string of each element of empty element；
3）The odd number component for extracting pin feature string vector forms a character trail, then by character string sorting rule to this
The character string of character trail is ranked up, and finally all character strings that this character trail has sorted is stringed together from the beginning to the end, shape
Into the positive pin feature string of empty element；
4）The even numbers component of extraction pin feature string vector forms another character trail, then right by character string sorting rule
The character string of this character trail is ranked up, and finally all character strings that this character trail has sorted are stringed together from the beginning to the end,
Form the negative pin feature string of empty element；
The step（3）And step（4）The character string sorting rule is：It sorts by the length of character string, long character string exists
Before, short character strings are rear；If two string lengths are identical, compare the ASCII character value of each character of two character strings successively, until
The ASCII character value of a certain position character of two character strings differs, before then the big character string of ASCII character value is come.
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| CN101192247A (en) * | 2006-11-28 | 2008-06-04 | 英业达股份有限公司 | Circuit connection calibration system and method |
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Inventor after: Yang Qiongfang Inventor after: Wei Zhongshan Inventor after: Zhu Haiyan Inventor after: Deng Yun Inventor before: Wei Zhongshan Inventor before: Deng Yun Inventor before: Liu Donghai Inventor before: Li Xiansheng Inventor before: Zhu Haiyan |
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