CN104330990B - Parity check cable model identification method and device thereof - Google Patents
Parity check cable model identification method and device thereof Download PDFInfo
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- CN104330990B CN104330990B CN201410549172.4A CN201410549172A CN104330990B CN 104330990 B CN104330990 B CN 104330990B CN 201410549172 A CN201410549172 A CN 201410549172A CN 104330990 B CN104330990 B CN 104330990B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2604—Test of external equipment
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention aims to provide a parity check cable model identification device which is applicable to a cable with a recognition signal core wire and has high system security. The device comprises a cable identification code module which is used for providing a detection signal source and comprises a basic code encoding circuit and a parity check auxiliary check code circuit, a computer detection control module which comprises a detection identification code circuit used for receiving and detecting the detection signal source and providing a parity check identification algorithm and an identification protection decision, and a protection control module used for receiving the identification protection decision and identifying the model of the cable with the recognition signal core wire according to the identification protection decision. The invention also provides a method based on the above device.
Description
Technical field
The present invention relates to the detection of power system detection technique field, more particularly, to cable and area of maintenance instrument, specifically relate to
And a kind of even parity check cable recognition methodss and device.
Background technology
In industry control and defence and military field, it is widely applied the cable of various different performances, different scales, cable is signal
Transmission or the important carrier of energy transmission, in generalization test pattern, general-utility test platform covers the test of polytypic product,
Power supply between system and equipment, control, communication transfer are both needed to complete by cable.Especially on polytypic test platform, use
Family flexibly selects the test cable of product of different model and corresponding test software as needed, realizes different model product
Test.A set of in test equipment, and in the case of test product Multiple Type, certain adapter on equipment generally can pass through
Cable is connected with the test product of different model, and the adapter model at test product end, electric definition often differ.Protect
The safety of card test product, the correctness of test and reliability, it is necessary that the correctness of test cable, in traditional method
Tester can only be according to cable identification artificial cognition cable model, when cable identification is unclear or is identified with the electricity of appearance of mistaking
Cable identification mistake can make test platform and the incorrect link of test product lead to product electrical damage situation to occur, when cable is
In high volume, during Multiple Type manual detection need to crosscheck, less efficient, poor accuracy, in addition artificial cognition detection wrong when
Necessary protective measure is all lacked to cable connection device both sides' product, causes traditional cable only to lean on the other artificial cognition in tag slot
The security of system of method is relatively low.
Content of the invention
For solve foregoing problems, it is an object of the invention to provide a kind of even parity check cable model identifying device it is adaptable to
There is the cable of identification signal core line, and there is the safety of higher system, comprising:
One cable identification code module, in order to provide sensed signal sources, including a basic yard coding circuit and an even parity check
Auxiliary examination code circuit；
One COMPUTER DETECTION control module, including a detection identification code circuit, in order to receive and to detect described detection signal
Source, and an even parity check recognizer is provided, and an identification protecting decision-making is exported according to described even parity check recognizer；
One protection control module, in order to receive and to have identification signal core line according to described detection protection decision discernment
Cable model.
Further, described sensed signal sources are included by a basic code and an even parity check identification code；Described basis code is by base
Plinth code coding circuit carries out to described cable unifying basic binary coding acquisition, and coding minimum number of bits depends on electricity to be identified
Cable type kind, the basic code of every kind of model to be measured is unique encodings；Described even parity check identification code is by even parity check auxiliary examination code
Circuit carries out the design acquisition of auxiliary code field, described basic code and the idol of check bit using the supplemental code of even parity check to basic code
Verification identification code collectively forms an even parity check cable recognition coding table.
Further, described detection identification code circuit also includes an isolated drive circuit, in order to described basis code and idol
Verification identification code carries out isolating conversion process.
Further, described even parity check recognizer is carried out to described sensed signal sources based on the identification code principle of even parity check
Identifying processing, and the output of described identification protecting decision-making is realized according to recognition result.
Further, described protection control module is also in order to carry out false alarm to type identifier for unmatched described cable
Warn and cable connection is implemented to disconnect protection.
Further, the described protection control module also described cable in order to type identifier to be coupling carries out connecting behaviour
Make.
Another object of the present invention is to providing a kind of method based on aforementioned even parity check cable model identifying device, it is suitable for
In the cable with identification signal core line, described cable also has key point protection signal heart yearn, and it comprises the steps:
1) Unified coding is carried out to the cable with identification signal core line, obtain common with even parity check identification code by basic code
The even parity check cable recognition coding table constituting；
2) the isolation conversion entering line level to the identification signal core line comprising identification code is carried out at computer acquisition after driving
Reason；
3) model coupling is automatically carried out according to the principle that cable recognition coding is even parity check；
4) when identification code meets even parity check principle and coupling model is correct, carry out the connection of key point protection signal heart yearn
Enable
5) otherwise, output protection control instruction, implements the disconnection protection to key point signal core line, automatically thus having realized
Become automatic identification and defencive function.
Brief description
Fig. 1 is the structured flowchart of even parity check cable model identifying device in the embodiment of the present invention；
Fig. 2 is cable identification and matching mode of operation schematic diagram in the embodiment of the present invention；
Fig. 3 is the fundamental diagram of even parity check cable model identifying device in the embodiment of the present invention；
Fig. 4 is the circuit diagram of isolated drive circuit in the embodiment of the present invention；
Fig. 5 is the circuit diagram protecting control module in the embodiment of the present invention；
Fig. 6 is the flow chart of cable model identification and matching in the embodiment of the present invention；
Fig. 7 is the functions of modules schematic diagram of embedded detection means software in the embodiment of the present invention.
Description of reference numerals: 11- cable identification code module；111- connector body；1111- basis code coding circuit；
1112- even parity check auxiliary examination code circuit；12- COMPUTER DETECTION control module；121- isolated drive circuit；122- detection identification
Code circuit；123- liquid crystal display；124- connector body；13- protects control module.
Specific embodiment
Features described above and advantage for enabling the present invention become apparent, special embodiment below, and coordinate institute's accompanying drawing to make
Describe in detail as follows.
Embodiment:
As shown in figure 1, the even parity check cable model identifying device of the present invention, hardware components include: cable identification code module
11st, COMPUTER DETECTION control module 12, protection control module 13；Wherein, COMPUTER DETECTION control module 12 is equipped with detection means
Software, its function includes: the construction of cable basic coding table, even parity check recognizer and detection protection decision-making.
Cable identification code module 11 is used for providing the sensed signal sources of cable type identifier, and cable identification code module 11 is one
Plant the physical implementation of computer binary code, high level is identified using " 1 ", low level, cable identification code are identified using " 0 "
Circuit 11 comprises two parts, basic code coding circuit 1111 and even parity check auxiliary examination code circuit 1112, and the digit of coding depends on
In cable type kind to be identified, for convenience of extension identification species, typically reserve 1-2 position bits of coded.Cable to be identified will
Its unique encodings circuit is different from other models as identity id.
The automatic detection that COMPUTER DETECTION control module 12 is used for cable identification code module 11 is mated with type identifier, the two
Cable to be identified is connected by connector body 111 and connector body 124.And test result is carried out to detection matching result
The decision-making output of the execution signal of output and protection control module 13.It includes isolated drive circuit 121 and embedded computer
Unit 122, as detection identification code circuit embedded computer unit 122 equipped with recognition detection software, and pass through a liquid crystal
Display 123 realizes display output.
The basic code inputting and even parity check code are isolated conversion process by described isolated drive circuit 121, and input is embedded
The computer digit amount collection input port of computer unit 122 is used for computer code and gathers, and is directed to coding circuit
Level computer digital data acquisition port level match conversion.It is illustrated in figure 4 the circuit diagram of isolated drive circuit.
The embedded computer unit 122 of this identifying processing adopts a kind of dsp main process task chip as in the control of system
Pivot.Certainly, the selection of computer unit is not limited to embedded computer processor, and the pc machine of other forms simultaneously assists digital quantity
The hardware of detection interface equally can complete this function.Defeated using its general gpio port of dsp main process task chip in this embodiment
Enter the digital quantity input detection that attribute meets computer code.Coding circuit containing basic code and even parity check coding is through electricity
Cable transmission, the level conversion of the converted isolation module of digital quantity input and logic pretreatment, input to the digital quantity input of dsp
Port detecting, recognition result is shown to display peripheral module, this display module adopts a kind of portable point by recognition detection software
Configuration flat board graphic lcd, this display module is only used as a kind of output cooperating equipment of identifying device and excludes identification
The ingredient of device.The general gpio interface unit that described LCD MODULE passes through dsp main process task chip is realized with outward
If the sequencing contro of LCD MODULE, realize the automatic display of test result.
Protection control module 13 be directed to cable in submit to key signal give computer instruction program controlled automatic connection with
Shutoff is processed, and this module responds the decision-making output order of described COMPUTER DETECTION control module 12, and output order is via main process task
The outbound course of the general gpio port of chip controls, and output order automatically controls a kind of electromagnetic relay signal link circuit,
When identifying that model is effective and consistent with predetermined model, connection instruction makes critical electrical circuit automatic switching in cable, otherwise
Turn off this loop, realize automatic protection.It is illustrated in figure 5 the circuit diagram of protection control module.
Recognition detection software section function is as follows: embedded detection means software running platform is dsp processor and its outer
Enclose circuit, by controlling the read-write operation of gpio port to realize digital quantity detection, protection controls, display sequencing contro and data pass
Pass.The recognizer mechanism of even parity check in recognizer can effectively improve detection identification certainty.
Software function module is as shown in fig. 7, described detection means software includes binary code detection module 1, even parity check inspection
Survey module 2, cable model matching module 3, protection control module 4, display module output control module 5 and other support dsp embedding
Enter the normal control module 6 run of formula software to form, be respectively completed the detection of binary code, the coding checkout principle core of even parity check
Right, the protection of the coupling of cable model and the display of test result, key signal controls the functions such as output.
The cable identification and matching mode of operation of the present invention is as shown in Fig. 2 the model of some cables to be identified of automatic identification, institute
State between cable connection to be identified and equipment a and equipment b, and meet connection socket one and the architectural characteristic being connected socket two, its
In the type kind of cable to be identified be n, and the electrical characteristic of n kind cable to be identified is different.
The operation principle block diagram of the present invention is as shown in figure 3, cable signal heart yearn in even parity check cable model identifying device
In comprise three kinds definition signal core lines, respectively identify signal core line, its radical depend on coding digit.Key point signal core
Line is protection signal heart yearn, and other are typically electrically connected signal core line.Wherein identification signal core line is except existing electric signal line
For completing some function heart yearns of identification function increase, the protection heart yearn that key point signal core line has by universal cordage.
Identification signal core line is the important component part of identification code circuit, and it comprises the coding of even parity check positioned at equipment a end
Circuit, b end connects to identification main control module, and identification main control module is directed to the isolation conversion that the heart yearn comprising identification code enters line level
Carry out computer acquisition process, identification software carries out model coupling automatically according to the principle that cable is encoded to even parity check after driving,
When identification code meets even parity check principle and coupling model is correct, the connection carrying out key point protection signal enables, and otherwise, calculates
Machine processor output protection control instruction, automatically implements the disconnection protection to key signal, thus realize completing automatic identification with
Defencive function.
As above-mentioned, the even parity check cable model identifying device work characteristics of the present invention is as follows:
1. the cable to be identified of multiple different models is carried out unifying basic binary coding, the basic code of acquisition is unique
Coding；
2. using the supplemental code of even parity check, the model to be measured in basic code table is carried out with the auxiliary code field design of check bit；
3. realize cable unique encodings circuit according to basic code table with check bit code field；
4. identification code circuit is transformed into computer digit signal input control process computer through isolation drive conversion to enter
Row digital level identifies；
5. control process computer is identified processing according to the identification code principle of even parity check；
6. control process computer carries out decision-making output according to recognition result, is disconnected protection for identification mistake, right
Carry out turn on automatically in the correct key signal of identification.
The basic code coding principle that the even parity check cable model identifying device of the present invention is related to is as follows:
Basic code code Design method adopts computer binary code principle, and binary coding digit is by cable to be identified
Type kind quantity determines, needs first to determine the type kind quantity of the cable to be identified carrying out type identifier.Then according to really
The type kind quantity of fixed cable to be identified, carries out unique encodings design to cable to be identified.The digit of binary code with
The corresponding relation needing code identification species is:
2m=n ... ... ... ... ... ... .. (1)
Wherein m is the digit of binary code, and n is the type kind quantity of cable to be identified.
Coded method is to start to encode one by one for cable to be identified from each bits of coded full 0, and concrete grammar is to set gradually two
The code word of everybody specific " 0 " or " 1 " in ary codes so as to become the unique encodings of cable to be identified, according to the method
The minimum code value of the model code encoding out is 0, and maximum encoded radio is 2m-1.
The tectonic sieving principle of even parity check code:
Unique binary identification code is had according to the cable to be identified that basic code is formed, ensure that computer is known in theory
The integrity of other places reason and correctness, the effect of the supplemental code of even parity check is to correct the data mistake being likely to occur in identification process
By mistake.
The identification code make comprising even parity check code is:
Identification code=basis code field+even parity check code field
The complete identification code so being formed is than basic code field one even parity check field bit of increase, the taking of even parity check field bit
It is even number that value should make the number of bits of " 1 " in whole identification code.When the number of " 1 " in basic code is even number, even parity check
Position is exactly " 0 ", and this check bit of no person is exactly " 1 ", so ensures that there is even number " 1 " in complete identification code.
When identification computer receives identification code, the requirement being first according to even parity check detects the number of " 1 " in identification code, such as
Fruit is even number, represents identification code effectively, proceeds to identify.As identification code does not meet even parity check principle, then this identification code is invalid,
Exit identification process, the investigation of inefficacy further the reason be identified code non-even parity check.
The design code efficiency introducing even parity check is m/ (m+1), and wherein Back ground Information field accounts for m bit.Code efficiency
Decrease than the code efficiency only with basic code, the effect of check bit be to detect identification code whether there is code error or
Person's computer identifies mistake, and according to the protocol conventions of even parity check, coding makes the coded method that circuit adopts even parity check, and identification is soft
Part first determines whether code validity based on the principle of even parity check.Error code can be effectively improved using the code Design after even parity check
Rate, when in test cable identification code cataloged procedure wrong when, recognition result occur with verify the inconsistent situation of principle can be by
Detect, it is to avoid the identification model mistake leading to because of code error occurs.Increase identification certainty.
The autgmentability design of cable type to be identified:
The identification code coding digit foundation of cable to be identified is cable under test type kind sum, when this type kind increases
When it is only necessary to increase coding digit, and increase a code field, you can number of species is increased to original twice, this finger
Number growth pattern especially adapts to the type kind extension of cable under test.
Table 1 cable model coding schedule to be identified
| Sequence number | di2 | di1 | di0 | Even parity bit |
| Model 1 | 0 | 0 | 0 | 0 |
| Model 2 | 0 | 0 | 1 | 1 |
| Model 3 | 0 | 1 | 0 | 1 |
| Model 4 | 0 | 1 | 1 | 0 |
| Model 5 | 1 | 0 | 0 | 1 |
| Model 6 | 1 | 0 | 1 | 0 |
| Model 7 | 1 | 1 | 0 | 0 |
| Model 8 | 1 | 1 | 1 | 1 |
Table 1 show the cable model coding schedule to be identified that type kind to be identified is eight kinds, and this coding schedule adopts
Three basic coding fields, even parity check code field, add up to four bit code fields, and this coding schedule is capable of eight kinds of model cables
Unique identifier.
The realization of identification code and identification step are as follows:
According to identification model coding schedule, " 1 " of identification code is adopted electrical characteristic to realize, by identification code " 0 " using electrically special
Property realize, the similar above-mentioned implementation method of even parity bit；
Corresponding with " 0 " for above-mentioned code word " 1 " electrical characteristic is converted into computer digit amount input letter through isolation drive
Number；
Computer digit amount testing circuit detects to the digital quantity after above-mentioned conversion, realizes the collection of identification code；
Computer identification software is entered row decoding according to the identification code table prestoring in internal memory and the coding schedule collecting and is processed, shape
Become recognition result, carry out decision-making output.
Cable identification code coding circuit is realized:
One group of contact selecting cable connector as code field, by this group contact pin according to the code word in coding schedule
" 1 " or " 0 " converts as level height, and wherein " 1 " is high level, and " 0 " is low level.It should be noted that described coding
Table can release such as table 1, in fact, according to the difference of cable model, coding schedule herein also can occur respective change, the present invention couple
This does not limit.
Input coding position is connected to positive pole or the negative pole of active signal through pull-up or pull down resistor, and identification circuit module carries
For active signal, input coding is changed through isolation drive, is inputted to computer disposal according to certain logic level corresponding relation
Device digital quantity acquiring circuit.Concrete logical relation is such, according to computer di numeral io collection characteristic it is stipulated that " 1 " and " 0 "
The high level representing respectively or low level, by " 1 " and " 0 " example chemical conversion high level in coding schedule or low level characteristic.
As shown in figure 3, using input conversion isolation module in the input channel of input coding, such as photoelectric isolating device improves node
The safety and reliability running, the encoded radio after isolation drive is inputted to computer acquisition switching value interface.
Taking certain bit field in identification code as a example, when the cable bits of coded of front end in this isolated variable circuit is high level,
Phototriode turns on, and the outfan di of photoisolator is low level, conversely, when input is for low level, photosensitive three poles
Pipe ends, and output level is high level.So active signal level is converted into the compatible standard of computer processor through isolation
Digital level.
As shown in fig. 6, the flow process that computer processor collection digital quantity coding is identified mating is:
1. main control computer processor system initializes and resets；
2. general gpio port (i.e. computer acquisition switching value interface) attribute is set；
3. the port of coding digital quantity input is input mode, i.e. di attribute；
4. control protection instruction output end mouth to be the way of output, i.e. do attribute；
5. it is successively read the corresponding channel data of bits of coded in the gpio port of digital quantity coding input；
6. read the switching value information of even parity check auxiliaring coding field；
7. complete decoded information is calculated according to the low and high level preserving each passage；
8. the even parity check principle inspection of coding, does not meet even parity check principle, exits testing process；
9. meet even parity check principle, carry out model coupling further；Main control computer loads all cable-types to be identified
Number encoding configuration table, take out a kind of coding of model every time from coding schedule, compare with the code word of current input, if
All bits of coded all meet, then find coupling model, otherwise continue to a kind of encoding ratio pair of lower model.
10. the match is successful for type identifier, enables protection control circuit output connection；
11. shut down computer processor hardware.
Recognition decision protective measure:
1. determine the key point signal in cable signal；
2. increase contact protection link before key signal defining point with cable connection；
3. being certainly dynamically connected and disconnect according to cable model matching result decision-making key point；
4. work as cable type identifier correct, control computer sends connection instruction, realizes key signal automatic switching on；
5. cable type identifier mistake, starting protection measure, disconnect key point link circuit, and report to the police.
Wherein, key point link circuit mainly comprise to enable control relay circuit that programme-control connects and disconnect,
Key point (the positive and negative loop that such as power supply is powered) circuit, the break-make that program is capable of this circuit controls, so as to protect mistake
After the cable connection of mistake model, the turn-off characteristic of key point, plays the purpose of protection circuit.
After the design of hardware and software of the present invention finishes, show through the application effect test of table 2, polytypic can easily be completed
The model automatic identification coupling of cable, reserves interface using the extension that facilitates that the setting of bits of coded redundancy identifies model to cable.Mesh
Front not only can be with the cable automatic identification of existing Multiple Type using this covering device, and the principle of even parity check can effective detection go out
In code Design mistake or coding circuit, code word level realizes the situation of mistake, and the cable model being particularly suitable for batch is known automatically
Not, cost savings the man power and material of detection, improve the work efficiency of cable model detection and the safety of cable connection
Property and reliability.
Table 2 automatic identification cable application example
Claims (6)
1. a kind of even parity check cable model identifying device is it is adaptable to have the cable of identification signal core line it is characterised in that wrapping
Include:
One cable identification code module, in order to provide sensed signal sources, and unifies to the cable with identification signal core line
Coding, obtains the even parity check cable recognition coding table being collectively formed by basic code with even parity check identification code；Compile including a basic code
Code circuit and an even parity check auxiliary examination code circuit；
One isolated drive circuit, in order to carry out isolating conversion process with even parity check identification code to described basis code；
One COMPUTER DETECTION control module, including a detection identification code circuit, in order to receive and to detect described sensed signal sources, and
One even parity check recognizer is provided, an identification protecting decision-making is exported according to described even parity check recognizer；
One protection control module, in order to receive and to have according to described detection protection decision discernment the electricity of identification signal core line
The model of cable.
2. even parity check cable model identifying device according to claim 1 is it is characterised in that described sensed signal sources include
One basic code and an even parity check identification code；Described basis code carries out unifying basis two by basic code coding circuit and enters to described cable
System coding obtains, and coding minimum number of bits depends on cable type kind to be identified, and the basic code of every kind of model to be measured is unique
Coding；Described even parity check identification code is verified to basic code using the supplemental code of even parity check by even parity check auxiliary examination code circuit
The auxiliary code field design of position obtains.
3. even parity check cable model identifying device according to claim 1 is it is characterised in that described even parity check recognizer
Identification code principle based on even parity check is identified to described sensed signal sources processing, and realizes described identification according to recognition result
The output of protection decision-making.
4. even parity check cable model identifying device according to claim 3 it is characterised in that described protection control module also
In order to false alarm is carried out and to cable connection enforcement disconnection protection for unmatched described cable to type identifier.
5. even parity check cable model identifying device according to claim 3 it is characterised in that described protection control module also
Described cable in order to type identifier to be coupling carries out making operation.
6. a kind of method based on even parity check cable model identifying device described in claim 1 is it is adaptable to have identification signal core
The cable of line, described cable also has key point protection signal heart yearn, and it comprises the steps:
1) Unified coding is carried out to the cable with identification signal core line, obtain and collectively formed with even parity check identification code by basic code
Even parity check cable recognition coding table；
2) the isolation conversion entering line level to the identification signal core line comprising identification code carries out computer acquisition process after driving；
3) model coupling is automatically carried out according to the principle that cable recognition coding is even parity check；
4) when identification code meets even parity check principle and coupling model is correct, the connection carrying out key point protection signal heart yearn enables
5) otherwise, output protection control instruction, implements the disconnection protection to key point signal core line automatically, thus realizing completing certainly
Dynamic identification and defencive function.
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| CN105372545A (en) * | 2015-10-09 | 2016-03-02 | 中国船舶重工集团公司第七〇五研究所 | A cable error prevention method based on code identification |
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| CN110095690A (en) * | 2019-05-20 | 2019-08-06 | 一汽-大众汽车有限公司 | A kind of mold cable detecting device and detection method |
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