CN104330990A - 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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- CN104330990A CN104330990A CN201410549172.4A CN201410549172A CN104330990A CN 104330990 A CN104330990 A CN 104330990A CN 201410549172 A CN201410549172 A CN 201410549172A CN 104330990 A CN104330990 A CN 104330990A
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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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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 electric system detection technique field, particularly relate to cable and detect and area of maintenance instrument, be specifically related to the recognition methods of a kind of even parity check cable and device.
Background technology
In industry control and defence and military field, be widely applied the cable of various different performance, different scales, cable is the important carrier of Signal transmissions or Energy Transfer, in universalization test pattern, general-utility test platform covers the test of polytypic product, and the power supply between system and equipment, control, communication transfer all need to be completed by cable.Special on polytypic test platform, user selects the test cable of the product of different model and corresponding testing software as required flexibly, realizes the test of different model product.A set of in testing apparatus, and when test product Multiple Type, certain connector on equipment can be connected with the test product of different model by cable usually, and the connector model of test product end, electrically definition are often not identical.Ensure the security of test product, the correctness of test and reliability, just must ensure the correctness of test cable, in classic method, tester can only according to cable identification artificial cognition cable model, the cable misidentify misunderstanding occurred when cable identification is unclear or identify wrong makes the incorrect link of test platform and test products cause product electrical damage situation to occur, when cable is in enormous quantities, during Multiple Type, manual detection need be crosschecked, efficiency is lower, poor accuracy, when artificial cognition detects wrong in addition, necessary safeguard measure is all lacked to cable connection device both sides product, cause the security of system of traditional cable only by other artificial recognition methods of tag slot lower.
Summary of the invention
For solving foregoing problems, the object of the present invention is to provide a kind of even parity check cable model recognition device, being applicable to the cable with identification signal heart yearn, and there is the security of higher system, comprising:
One cable identification code module, in order to provide a sensed signal sources, comprises basis yard coding circuit and an even parity check auxiliary examination decoding circuit;
One COMPUTER DETECTION control module, comprises a detection identification code circuit, in order to receive and to detect described sensed signal sources, and provides an even parity check recognizer, and exports an identification protecting decision-making according to described even parity check recognizer;
One protecting control module, in order to receive and to detect the model described in protection decision discernment with the cable of identification signal heart yearn according to described.
Further, described sensed signal sources comprises by a basic code and an even parity check identification code; Described basic code carries out the acquisition of uniform based binary coding by basic code coding circuit to described cable, and coding minimum number of bits depends on cable type kind to be identified, and the basic code of often kind of model to be measured is unique encodings; Described even parity check identification code adopts the supplemental code of even parity check to obtain the auxiliary code field design that basic code carries out check bit by even parity check auxiliary examination decoding circuit, and described basic code and even parity check identification code form an even parity check cable recognition coding table jointly.
Further, described detection identification code circuit also comprises an isolated drive circuit, in order to carry out isolation conversion process to described basic code and even parity check identification code.
Further, described even parity check recognizer carries out identifying processing based on the identification code principle of even parity check to described sensed signal sources, and realizes the output of described identification protecting decision-making according to recognition result.
Further, described protecting control module also in order to type identifier be unmatched described cable carry out false alarm and to cable connect implement disconnect protection.
Further, described protecting control module also in order to type identifier be coupling described cable carry out making operation.
Another object of the present invention is to provide a kind of method based on aforementioned even parity check cable model recognition device, be applicable to the cable with identification signal heart yearn, described cable also has key point guard signal heart yearn, and it comprises the steps:
1) Unified coding is carried out to the cable with identification signal heart yearn, obtain the even parity check cable recognition coding table be jointly made up of basic code and even parity check identification code;
2) computer acquisition process is carried out after the identification signal heart yearn comprising identification code being carried out to the isolation conversion driving of level;
3) principle being even parity check according to cable recognition coding carries out model coupling automatically;
4) when identification code meets even parity check principle and coupling model is correct, the connection carrying out key point guard signal heart yearn is enable
5) otherwise, output protection steering order, automatically implements protect the disconnection of key point signal core line, thus has realized automatic identification and defencive function.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of even parity check cable model recognition device in the embodiment of the present invention;
Fig. 2 is cable identification coupling mode of operation schematic diagram in the embodiment of the present invention;
Fig. 3 is the fundamental diagram of even parity check cable model recognition 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 of protecting control module in the embodiment of the present invention;
Fig. 6 is the process flow diagram of cable type identifier coupling in the embodiment of the present invention;
Fig. 7 is the functions of modules schematic diagram of embedded pick-up unit 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 decoding circuit; 12-COMPUTER DETECTION control module; 121-isolated drive circuit; 122-detects identification code circuit; 123-liquid crystal display; 124-connector body; 13-protecting control module.
Embodiment
For making above-mentioned feature and advantage of the present invention become apparent, special embodiment below, and coordinate institute's accompanying drawing to be described in detail below.
Embodiment:
As shown in Figure 1, even parity check cable model recognition device of the present invention, hardware components comprises: cable identification code module 11, COMPUTER DETECTION control module 12, protecting control module 13; Wherein, COMPUTER DETECTION control module 12 is equipped with pick-up unit software, and its function comprises: the structure of cable basic coding table, even parity check recognizer and detect protection decision-making.
Cable identification code module 11 is for providing the sensed signal sources of cable type identifier, cable identification code module 11 is physical implementation of a kind of computing machine binary code, adopt " 1 " mark high level, adopt " 0 " mark low level, cable identification code circuit 11 comprises two parts, basic code coding circuit 1111 and even parity check auxiliary examination decoding circuit 1112, and the figure place of coding depends on cable type kind to be identified, kind is identified, general reserved 1-2 position bits of coded for convenience of expansion.Its unique encodings circuit is different from other model as identity ID by cable to be identified.
COMPUTER DETECTION control module 12 is mated with type identifier for the automatic detection of cable identification code module 11, and the two is connected cable to be identified by connector body 111 with connector body 124.And detection matching result is carried out to the decision-making output of the output of test result and the executive signal of protecting control module 13.It comprises isolated drive circuit 121 and embedded computer unit 122, as the embedded computer unit 122 detecting identification code circuit, recognition detection software is housed, and realizes display translation by a liquid crystal display 123.
The basic code of input and even parity check code are isolated conversion process by described isolated drive circuit 121, the computer digit amount Gather and input port of input embedded computer unit 122 is used for computer code collection, wherein relates to the level match conversion of the level computing machine digital data acquisition port of coding circuit.Be illustrated in figure 4 the circuit diagram of isolated drive circuit.
The embedded computer unit 122 of this identifying processing adopts the main process chip of a kind of DSP as the control axis of system.Certainly, selecting of computer unit is not limited to embedded computer processor, the PC of other form the hardware that auxiliary figure amount detects interface can complete this function equally.The digital quantity input using the input attributes of its general GPIO port of the main process chip of DSP to meet computer code in this embodiment detects.The coding circuit of encoding containing basic code and even parity check is through cable transmission, digital quantity input end is through changing level conversion and the logic pre-service of isolation module, the digital quantity input port inputing to DSP detects, recognition result shows to showing peripheral module by recognition detection software, this display module adopts the dull and stereotyped graphic lcd of a kind of portable point configuration, and this display module only exports cooperating equipment as recognition device a kind of and excludes the ingredient of recognition device.Described LCD MODULE realizes, with the sequential control of peripheral hardware LCD MODULE, realizing the automatic display of test result by the general GPIO interface unit of the main process chip of DSP.
The program controlled automatic connection that protecting control module 13 gives computer instruction for the key signal submitted in cable processes with shutoff; the decision-making output order of COMPUTER DETECTION control module 12 described in this module responds; output order controls via the outbound course of the general GPIO port of main process chip; output order controls a kind of electromagnetic relay signal link circuit automatically; when identify model effectively and consistent with predetermined model time; be communicated with instruction and make critical electrical circuit automatic switching in cable; otherwise turn off this loop, realize automatically protecting.Be illustrated in figure 5 the circuit diagram of protecting control module.
Recognition detection software section function is as follows: embedded pick-up unit software running platform is dsp processor and peripheral circuit thereof, realizes digital quantity detection, protecting control, display timing generator control and data transmission by the read-write operation of control GPIO port.The recognizer mechanism of even parity check in recognizer can effectively improve detection identification certainty.
Software function module as shown in Figure 7; described pick-up unit software comprise binary code detection module 1, even parity check detection module 2, cable model matching module 3, protecting control module 4, display module output control module 5 and other support that the control module 6 that DSP embedded software normally runs forms; complete the detection of binary code respectively; the coding checkout principle of even parity check is checked, the function such as protecting control output of the coupling of cable model and the display of test result, key signal.
Cable identification coupling mode of operation of the present invention as shown in Figure 2, the model of the some cables to be identified of automatic identification, described cable to be identified connects and between device A and equipment B, and meet the architectural characteristic of gang socket one and gang socket two, wherein the type kind of cable to be identified is n, and the electrical specification of n kind cable to be identified is different.
As shown in Figure 3, comprise the signal core line of three kinds of definition in the cable signal heart yearn in even parity check cable model recognition device, be respectively identification signal heart yearn, its radical depends on coding figure place to principle of work block diagram of the present invention.Key point signal core line and guard signal heart yearn, other are generally electrically connected signal core line.Wherein identification signal heart yearn is except existing electric signal line has been some function heart yearns that recognition function increases, the protection heart yearn that key point signal core line has for universal cordage.
Identification signal heart yearn is the important component part of identification code circuit, it is positioned at the coding circuit that device A end comprises even parity check, B end is connected to identification main control module, identify that main control module carries out computer acquisition process after carrying out the isolation conversion driving of level for the heart yearn comprising identification code, the principle that identification software is encoded to even parity check according to cable carries out model coupling automatically, when identification code meets even parity check principle and coupling model is correct, the connection carrying out key point guard signal is enable, otherwise, computer processor output protection steering order, automatic enforcement is protected the disconnection of key signal, thus realized automatically identifying and defencive function.
As above-mentioned, even parity check cable model recognition device work characteristics of the present invention is as follows:
1. the cable to be identified of multiple different model is carried out uniform based binary coding, the basic code of acquisition is unique encodings;
2. adopt the supplemental code of even parity check to carry out the auxiliary code field design of check bit to the model to be measured in basic code table;
3. realize cable unique encodings circuit according to basic code table and check bit code field;
4. identification code circuit is transformed into computer digit signal input control process computer through isolation drive conversion and carries out digital level identification;
5. control treatment computing machine carries out identifying processing according to the identification code principle of even parity check;
6. control treatment computing machine carries out decision-making output according to recognition result, is disconnected protection for identification error, automatically connects for the correct key signal of identification.
The basic code coding principle that even parity check cable model recognition device of the present invention relates to is as follows:
Basis code code Design method adopts computing machine binary code principle, and binary coding figure place is determined by the type kind quantity of cable to be identified, first needs the type kind quantity of the cable to be identified of determining to carry out type identifier.Then according to the type kind quantity of the cable to be identified determined, unique encodings design is carried out to cable to be identified.The figure place of binary code with needing the corresponding relation of code identification kind is:
2
m＝n………………………………..(1)
Wherein m is the figure place of binary code, and n is the type kind quantity of cable to be identified.
Coding method is for cable to be identified is encoded one by one from each bits of coded full 0, concrete grammar is the code word of every concrete " 0 " or " 1 " set gradually in binary code, become the unique encodings of cable to be identified, the minimum code value of the model code of encoding out according to the method is 0, and maximum encoded radio is 2
m-1.
The tectonic sieving principle of even parity check code:
Have unique binary identification code according to the cable to be identified that basic code is formed, can ensure integrality and the correctness of computer recognizing process in theory, the effect of the supplemental code of even parity check is to correct the error in data that may occur in identifying.
The identification code make comprising even parity check code is:
Identification code=basic code field+even parity check code field
The complete identification code of such formation increases an even parity check field bit than basic code field, and the value of even parity check field bit should make the number of bits of " 1 " in whole identification code be even number.When the number of " 1 " in basic code is even number, even parity bit is exactly " 0 ", and this check bit of no person is exactly " 1 ", so just can ensure to have even number " 1 " in complete identification code.
When identifying that computing machine receives identification code, first detect the number of " 1 " in identification code according to the requirement of even parity check, if even number, represent that identification code is effective, proceed to identify.As identification code does not meet even parity check principle, then this identification code is invalid, exits identification process, carries out the further inefficacy investigation of the reason of the non-even parity check of identification code.
The design code efficiency introducing even parity check is m/ (m+1), and wherein Back ground Information field accounts for m bit.Code efficiency adopts the code efficiency of basic code to decrease than only, the effect of check bit is whether detect identification code exists code error or computer recognizing mistake, according to the protocol conventions of even parity check, coding makes the coding method that circuit adopts even parity check, and first identification software judges code validity based on the principle of even parity check.Adopt the code Design after even parity check effectively can improve the bit error rate, when wrong in test cable identification code cataloged procedure, recognition result occurs that the situation inconsistent with verification principle can be detected, and avoids the identification model mistake occurred because code error causes.Increase identification certainty.
The extendability design of cable type to be identified:
The identification code coding figure place of cable to be identified is according to being cable under test type kind sum, when this type kind increases, only need to increase coding figure place, and increase a code field, kind quantity can be increased to original twice, this exponential increase mode especially adapts to the type kind expansion of cable under test.
Table 1 cable model to be identified coding schedule
| 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 is depicted as the cable model coding schedule to be identified that a type kind to be identified is eight kinds, this coding schedule adopts three basic coding fields, a digit pair check code field, add up to four bit code fields, this coding schedule can realize the unique identifier of eight kinds of model cables.
Realization and the identification step of identification code are as follows:
According to identifying that " 1 " of identification code adopts electrical specification to realize by model coding schedule, electrical specification is adopted to realize identification code " 0 ", the roughly the same above-mentioned implementation method of even parity bit;
Electrical specification corresponding with " 0 " for above-mentioned code word " 1 " is converted into computer digit amount input signal through isolation drive;
Computer digit amount testing circuit detects the digital quantity after above-mentioned conversion, realizes the collection of identification code;
Computer recognizing software carries out decoding process according to the identification code table prestored in internal memory and the coding schedule collected, and forms recognition result, carries out decision-making output.
Cable identification code coding circuit realizes:
Select one group of contact of cable connector as code field, this group contact pin converted as level height according to the code word " 1 " in coding schedule or " 0 ", wherein " 1 " is high level, and " 0 " is low level.It should be noted that, described coding schedule can release such as table 1, and in fact, according to the difference of cable model, coding schedule herein also respective change can occur, and the present invention does not limit this.
Input coding position is connected to positive pole or the negative pole of active signal through pull-up or pull down resistor, identification circuit module provides source signal, input coding is changed through isolation drive, inputs to computer processor digital quantity acquiring circuit according to certain logic level corresponding relation.Concrete logical relation is such, gathers characteristic according to computing machine DI Digital I/O, and the high level that regulation " 1 " and " 0 " represent respectively or low level, change into high level or low level characteristic by " 1 " and " 0 " example in coding schedule.As shown in Figure 3, the input channel of input coding adopts input conversion isolation module, and such as photoelectric isolating device improves the safety and reliability that node runs, and the encoded radio after isolation drive is inputed to computer acquisition switching value interface.
For certain bit field in identification code, when in this isolated variable circuit, the cable bits of coded of front end is high level, phototriode conducting, the output terminal DI of photoisolator is low level, otherwise, when input end is low level, phototriode ends, and output level is high level.Such active signal level is converted into the standard digital level of computer processor compatibility through isolation.
As shown in Figure 6, computer processor collection digital quantity coding carries out identifying that the flow process of coupling is:
1. main control computer processor system initialization resetting;
2. general GPIO port (i.e. computer acquisition switching value interface) attribute is set;
3. the port of coded digital amount input is input mode, i.e. DI attribute;
4. Control protection instruction output end mouth is the way of output, i.e. DO attribute;
5. read the channel data that in the GPIO port of digital quantity coding input, bits of coded is corresponding successively;
6. read the switching value information of even parity check auxiliaring coding field;
7. calculate complete decoded information 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 the encoding configuration table of all cable models to be identified, each coding taking out a kind of model from coding schedule, compares with the code word of current input, if all bits of coded all meet, then find coupling model, otherwise just continue the encoding ratio pair of lower a kind of model.
10. the match is successful for type identifier, and enable protecting control circuit exports and is communicated with;
11. shut down computer processor hardware.
Recognition decision safeguard measure:
1. determine the key point signal in cable signal;
2. before key signal defining point is connected with cable, increase contact protection link;
3. being certainly dynamically connected and disconnection according to cable model matching result decision-making key point;
4., when cable type identifier is correct, computer for controlling sends connection instruction, realizes key signal automatic switching on;
5. cable model identification error, starting protection measure, disconnects key point link circuit, and reports to the police.
Wherein, key point link circuit mainly comprises control relay circuit, key point (the positive and negative loop of the such as Power supply) circuit that can realize programmed control and connect and disconnect; the break-make that program can realize this circuit controls; thus the cable of wrong model can be protected to connect the turn-off characteristic of rear key point, play the object of protection circuit.
After design of hardware and software of the present invention, the effect test through table 2 shows, the model that can easily complete polytypic cable identifies coupling automatically, adopts bits of coded redundancy to arrange and reserves interface to the expansion that facilitates of cable identification model.This covering device is utilized not only can the cable of existing Multiple Type automatically to identify at present, and the principle of even parity check effectively can detect that in code Design mistake or coding circuit, code word level realizes the situation of mistake, the cable model being particularly suitable for batch identifies automatically, cost savings the man power and material of detection, the security that the work efficiency that improve the detection of cable model is connected with cable and reliability.
Table 2 identifies cable application example automatically
Claims (7)
1. an even parity check cable model recognition device, is applicable to the cable with identification signal heart yearn, it is characterized in that, comprising:
One cable identification code module, in order to provide a sensed signal sources, comprises basis yard coding circuit and an even parity check auxiliary examination decoding circuit;
One COMPUTER DETECTION control module, comprises a detection identification code circuit, in order to receive and to detect described sensed signal sources, and provides an even parity check recognizer, exports an identification protecting decision-making according to described even parity check recognizer;
One protecting control module, in order to receive and to detect the model described in protection decision discernment with the cable of identification signal heart yearn according to described.
2. even parity check cable model recognition device according to claim 1, is characterized in that, described sensed signal sources comprises by a basic code and an even parity check identification code; Described basic code carries out the acquisition of uniform based binary coding by basic code coding circuit to described cable, and coding minimum number of bits depends on cable type kind to be identified, and the basic code of often kind of model to be measured is unique encodings; Described even parity check identification code adopts the supplemental code of even parity check to obtain the auxiliary code field design that basic code carries out check bit by even parity check auxiliary examination decoding circuit, and described basic code and even parity check identification code form an even parity check cable recognition coding table jointly.
3. even parity check cable model recognition device according to claim 1, it is characterized in that, described detection identification code circuit also comprises an isolated drive circuit, in order to carry out isolation conversion process to described basic code and even parity check identification code.
4. even parity check cable model recognition device according to claim 1; it is characterized in that; described even parity check recognizer carries out identifying processing based on the identification code principle of even parity check to described sensed signal sources, and realizes the output of described identification protecting decision-making according to recognition result.
5. even parity check cable model recognition device according to claim 4, is characterized in that, described protecting control module also in order to type identifier be unmatched described cable carry out false alarm and to cable connect implement disconnect protection.
6. even parity check cable model recognition device according to claim 4, is characterized in that, described protecting control module also in order to type identifier be coupling described cable carry out making operation.
7., based on a method for even parity check cable model recognition device described in claim 1, be applicable to the cable with identification signal heart yearn, described cable also has key point guard signal heart yearn, and it comprises the steps:
1) Unified coding is carried out to the cable with identification signal heart yearn, obtain the even parity check cable recognition coding table be jointly made up of basic code and even parity check identification code;
2) computer acquisition process is carried out after the identification signal heart yearn comprising identification code being carried out to the isolation conversion driving of level;
3) principle being even parity check according to cable recognition coding carries out model coupling automatically;
4) when identification code meets even parity check principle and coupling model is correct, the connection carrying out key point guard signal heart yearn is enable
5) otherwise, output protection steering order, automatically implements protect the disconnection of key point signal core line, thus has realized automatic identification and defencive function.
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| CN105137218A (en) * | 2015-07-15 | 2015-12-09 | 江西洪都航空工业集团有限责任公司 | System and method for identifying detected product |
| 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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| CN109001257A (en) * | 2018-06-21 | 2018-12-14 | 安徽江淮汽车集团股份有限公司 | A kind of harness abrasion pre-warning device and method |
| 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 |
| CN110274628A (en) * | 2019-06-25 | 2019-09-24 | 苏州浦立特电子科技有限公司 | A kind of mold cable automatic checkout system and method |
| CN110274628B (en) * | 2019-06-25 | 2022-05-24 | 萧县众科电磁检测有限公司 | Automatic detection system and method for mould cable |
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