CN105590456A - Geomagnetic threshold value adjusting method and geomagnetic threshold value adjusting system - Google Patents
Geomagnetic threshold value adjusting method and geomagnetic threshold value adjusting system Download PDFInfo
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- CN105590456A CN105590456A CN201610111209.4A CN201610111209A CN105590456A CN 105590456 A CN105590456 A CN 105590456A CN 201610111209 A CN201610111209 A CN 201610111209A CN 105590456 A CN105590456 A CN 105590456A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
Abstract
The invention relates to a geomagnetic threshold value adjusting method and a geomagnetic threshold value adjusting system. The geomagnetic threshold value is characterized in that step a, a geomagnetic sensor is used to acquire geomagnetic data corresponding to a detection point, and is used to forward the geomagnetic data to a geomagnetic detection system by a relay; step b, the geomagnetic detection system is used to read the geomagnetic data transmitted by the relay, and is used to determine the device state of the geomagnetic sensor corresponding to the geomagnetic data according to the original geomagnetic data, and is used to compare the determination result with the device state of the geomagnetic sensor returned by a hardware logic determination unit; step c, the geomagnetic data can be added to the recent processing list of the corresponding detection point, and the error of the recent processing list can be calculated, and whether the error of the recent processing list is greater than the preset acceptable error can be determined, and when the error of the recent processing list is greater than the preset acceptable error, the geomagnetic threshold value corresponding to the geomagnetic sensor can be recalculated. According to the invention, the identification accuracy of the geomagnetic sensor state can be improved, and the hysteresis of the geomagnetic threshold value adjustment can be eliminated.
Description
Technical field
The invention belongs to earth magnetism threshold process technical field, relate in particular to a kind of earth magnetism threshold value and adjustAdjusting method and system.
Background technology
Earth magnetism wagon detector is mounted in the sensor of road surface, flows specifically for vehicleMonitoring, the conversion of control traffic signals and the traffic offence monitoring record of amount and the speed of a motor vehicle. Earth magnetism carDetector is a kind of Real-Time Monitoring vehicle dynamic, implements the basis of intelligent transportation manage and establishesExecute. Data collecting system plays very important effect in traffic surveillance and control system, and earth magnetism passesSensor is the key component of data collecting system, and the performance of sensor is to data collecting systemAccuracy plays a decisive role. Earth magnetism receiver (trunking) is mainly for whole with earth magnetismEnd coordinates, and completes reception and the processing of data.
In prior art, geomagnetism detecting system often can not be in time according to environmental condition change andTime effectively adjust earth magnetism threshold model, recognition accuracy is limited. In the large feelings of environmental changeUnder condition, (as equipment has carried out a heavy truck around temporarily) error rate is higher, has limited existingThe range of application of some geomagnetism detecting systems.
Summary of the invention
The invention provides a kind of earth magnetism threshold adjustment methods and system, be intended at least necessarilyIn degree, solve the aforementioned problems in the prior.
Implementation of the present invention is as follows, and a kind of earth magnetism threshold adjustment methods, comprises following stepRapid:
Step a: gather the geomagnetic data of corresponding test point by geomagnetic sensor, and in passing throughGeomagnetic data is forwarded to geomagnetism detecting system by the device that continues;
Step b: read by geomagnetism detecting system the geomagnetic data that repeater is sent into, according to formerBeginning geomagnetic data judges the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding, and will sentenceIt is right that the equipment state of the geomagnetic sensor that disconnected result and hardware logic judging unit return is carried outRatio, if two equipment states misfit, the equipment state of this geomagnetic sensor is considered as canAdjustment state;
Step c: geomagnetic data is added in the nearest processing queue of corresponding test point, calculateThe error of nearly processing queue, and whether the error that judges nearest processing queue is greater than and presetsAcceptable error, if recently the error of processing queue is greater than the predefined mistake of acceptingPoor, recalculate this geomagnetic sensor correspondence according to the earth magnetism threshold value calculating for the last timeEarth magnetism threshold value.
The technical scheme that the embodiment of the present invention is taked also comprises: before described step a, also comprise: joinPut the systematic parameter of geomagnetism detecting system; Described configuration-system parameter comprises that maximal phase is to mistakeDifference, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n, threshold value adjustment modelAs follows:
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is more than or equal to 0 realityNumber, b is more than or equal to 0 real number, and c is more than or equal to 0 real number, and k is more than or equal to 1Natural number, m is more than or equal to 1 natural number, and n is more than or equal to 1 natural number, x, y,Z is ground geomagnetic data.
The technical scheme that the embodiment of the present invention is taked also comprises: before described step a, also comprise: connectGeomagnetic sensor and the repeater of ground connection magnetic sensing front end system, guarantee earth magnetism sensing front end systemSystem can effectively be delivered to geomagnetism detecting system by the geomagnetic data collecting.
The technical scheme that the embodiment of the present invention is taked also comprises: in described step b, and described groundMagnetic detection system reads the geomagnetic data that repeater is sent into, according to magnetic data judgement should primitivelyThe equipment state of the geomagnetic sensor that geomagnetic data is corresponding specifically comprises: for each detectionPoint, geomagnetism detecting system is accepted its 5 tuple geomagnetic datas that Magnetic Sensor returns accordingly, headFirst build initial decision function G (x, y, z), adjust along with the input of geomagnetic data judges described threshold valueWhether integral mould is set up, if threshold value adjustment model is set up, will meet threshold value adjustment modelGeomagnetic sensor state is designated as occupied, if threshold value adjustment model is false, will not meetThe geomagnetic sensor state of threshold value adjustment model is designated as the free time.
The technical scheme that the embodiment of the present invention is taked also comprises: described step c also comprises: when havingWhen geomagnetic data adds nearest processing queue, judge the geomagnetic sensor that this geomagnetic data is correspondingEquipment state whether be capable of regulating state, if not capable of regulating state, judgement the most nearbyWhether reason queue reaches predetermined length; If capable of regulating state calculates and processes recently teamThe error of row.
The technical scheme that the embodiment of the present invention is taked also comprises: described step c also comprises: judgementWhether processing queue reaches predetermined length recently, if do not reach predetermined length, continues to readGet the geomagnetic data that repeater is sent into; If reach predetermined length, calculate and process recently teamThe error of row.
Another technical scheme that the embodiment of the present invention is taked is: a kind of earth magnetism threshold value adjustment isSystem, comprises earth magnetism sensing front end system and geomagnetism detecting system, and described earth magnetism sensing front end isTurnkey is drawn together geomagnetic sensor, hardware logic judging unit and repeater, geomagnetic sensor and hardPart logic judgment unit is connected with repeater signal respectively, and repeater and geomagnetism detecting system connectConnect;
Described geomagnetic sensor is for gathering the geomagnetic data of corresponding test point;
Described hardware logic judging unit is for judging the equipment state of geomagnetic sensor;
Described repeater is for geomagnetic sensor and hardware logic judging unit and geomagnetism detecting systemData receiver between system and forwarding;
Described geomagnetism detecting system is for reading the geomagnetic data that repeater is sent into, according to originalGeomagnetic data judges the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding, and will judgeThe equipment state of the geomagnetic sensor that result and hardware logic judging unit return contrasts,If two equipment states misfit, the equipment state of this geomagnetic sensor is considered as to capable of regulatingState; And geomagnetic data is added in the nearest processing queue of corresponding test point, calculate recentlyThe error of processing queue, the error that judges nearest processing queue whether be greater than predefined canAccept error, if the error of processing queue is greater than predefined acceptable error recently,Recalculate according to the earth magnetism threshold value calculating for the last time the ground that this geomagnetic sensor is correspondingMagnetic threshold value.
The technical scheme that the embodiment of the present invention is taked also comprises: described geomagnetism detecting system is also wrappedDraw together parameter configuration module, data read module, the first judge module, the second judge module,Error calculating module and threshold calculation module;
Described parameter configuration module is for configuring the systematic parameter of geomagnetism detecting system;
Described data read module is for reading the geomagnetic data that repeater is sent into, according to originalGeomagnetic data judges the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding, and will judgeThe equipment state of the geomagnetic sensor that result and hardware logic judging unit return contrasts,If two equipment states misfit, the equipment state of this geomagnetic sensor is considered as to capable of regulatingState;
Described the first judge module is for adding geomagnetic data the nearest processing of corresponding test pointIn queue, and judge whether the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding is canAdjustment state, if not capable of regulating state, processes recently by the second judge module judgementWhether queue reaches predetermined length, if capable of regulating state, by error calculating module meterCalculate the error of nearest processing queue;
Described the second judge module is used for judging whether nearest processing queue reaches predetermined length,If do not reach predetermined length, data read module continues to read the ground that repeater is sent intoMagnetic data; If reach predetermined length, calculate nearest processing queue by error calculating moduleError;
Described error calculating module is for calculating the error of nearest processing queue, and judgement recentlyWhether the error of processing queue is greater than predefined acceptable error, if process recently teamThe error of row is not more than predefined acceptable error, exports judged result to next stageSystem; If the error of processing queue is greater than predefined acceptable error recently, pass throughThreshold calculation module recalculates earth magnetism threshold value;
The earth magnetism threshold value that described threshold calculation module calculates for the last time for basis againCalculate the earth magnetism threshold value that this geomagnetic sensor is corresponding, until error is less than maximum acceptable errorTill.
The technical scheme that the embodiment of the present invention is taked also comprises: described configuration-system parameter comprisesMaximum relative error, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n, thresholdValue adjustment model is as follows:
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is more than or equal to 0 realityNumber, b is more than or equal to 0 real number, and c is more than or equal to 0 real number, and k is more than or equal to 1Natural number, m is more than or equal to 1 natural number, and n is more than or equal to 1 natural number, x, y,Z is ground geomagnetic data.
The technical scheme that the embodiment of the present invention is taked also comprises: described data read module readsThe geomagnetic data that repeater is sent into, judges that according to magnetic data primitively this geomagnetic data is correspondingThe equipment state of geomagnetic sensor specifically comprises: for each test point, and geomagnetism detecting systemSystem is accepted its 5 tuple geomagnetic datas that Magnetic Sensor returns accordingly, first builds initial decisionFunction G (x, y, z), along with the input of geomagnetic data judges whether described threshold value adjustment model becomesVertical, if threshold value adjustment model is set up, will meet the geomagnetic sensor shape of threshold value adjustment modelState is designated as occupied, if threshold value adjustment model is false, will not meet threshold value adjustment modelGeomagnetic sensor state be designated as the free time.
Earth magnetism threshold adjustment methods and the system of the embodiment of the present invention are read by geomagnetism detecting systemGet the geomagnetic data that repeater is sent into, judge this geomagnetic data correspondence according to magnetic data primitivelyThe equipment state of geomagnetic sensor, and result of determination and hardware logic judging unit are returnedThe equipment state of geomagnetic sensor contrast, improved the identification of geomagnetic sensor stateAccuracy rate; And based on existing self adaptation adjustment model, can realize the quick of earth magnetism threshold valueAdjust, eliminated the hysteresis quality that earth magnetism threshold value is adjusted.
Brief description of the drawings
Fig. 1 is the flow chart of the earth magnetism threshold adjustment methods of the embodiment of the present invention;
Fig. 2 is the structural representation of the earth magnetism threshold adjustment methods of the embodiment of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below knotClose drawings and Examples, the present invention is further elaborated. Should be appreciated that hereinDescribed specific embodiment only, in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, is the flow chart of the earth magnetism threshold adjustment methods of the embodiment of the present invention. ThisThe earth magnetism threshold adjustment methods of inventive embodiments comprises the following steps:
Step 100: the systematic parameter of configuration geomagnetism detecting system;
In step 100, systematic parameter can be obtained from objects outside, also can be from XMLConfiguration file reads, and the parameter reading is as system primary condition; Configuration-system parameter bagDraw together maximum relative error, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n,Threshold value adjustment model is as follows:
Dl<G(x,y,z)<Du(1)
In formula (1), G (x, y, z)=kxa+myb+nzc, a is more than or equal to 0 realityNumber, b is more than or equal to 0 real number, and c is more than or equal to 0 real number, and k is more than or equal to 1Natural number, m is more than or equal to 1 natural number, and n is more than or equal to 1 natural number, x, y,Z is ground geomagnetic data.
Step 200: connect geomagnetic sensor and the repeater of earth magnetism sensing front end system, guaranteeEarth magnetism sensing front end system can effectively be delivered to the geomagnetic data collecting geomagnetism detecting systemSystem;
In step 200, earth magnetism sensing front end system comprises geomagnetic sensor, repeater and hardPart logic judgment unit etc., geomagnetic sensor is used for gathering the geomagnetic data of corresponding test point,Hardware logic judging unit for judge geomagnetic sensor equipment state (as taken orAvailable), repeater is for geomagnetic sensor and hardware logic judging unit and geomagnetism detectingData receiver between system and forwarding.
Step 300: gather the geomagnetic data of corresponding test point by geomagnetic sensor, will gatherGeomagnetic data transfer to repeater, and by repeater, geomagnetic data is forwarded to earth magnetism inspectionExamining system;
Step 400: read by geomagnetism detecting system the geomagnetic data that repeater is sent into, according toMagnetic data judges the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding primitively, and willIt is right that the equipment state of the geomagnetic sensor that judged result and hardware logic judging unit return is carried outRatio, if two equipment states misfit, execution step 500; If two equipment state kissesClose execution step 600;
In step 400, for each test point, geomagnetism detecting system is accepted it accordingly5 tuple geomagnetic datas that Magnetic Sensor returns (magn_x, magn_y, magn_z,Physic_state, timestamp), first build initial decision function G (x, y, z), with landingThe input of magnetic data judges whether above-mentioned formula (1) is set up, if formula (1) establishment,The geomagnetic sensor state of coincidence formula (1) is designated as to occupied (taken), if formula(1) be false, the geomagnetic sensor state that does not meet formula (1) is designated as to the free time(available)。
Step 500: the equipment state of this geomagnetic sensor is considered as to capable of regulating state;
Step 600: geomagnetic data is added in the nearest processing queue of corresponding test point, andWhether the equipment state that judges the geomagnetic sensor that this geomagnetic data is corresponding is capable of regulating state,If not capable of regulating state, execution step 700, if capable of regulating state is carried out stepRapid 800;
In step 600, geomagnetism detecting system is after startup, to each geomagnetic sensor pairThe test point of answering set up a nearest processing queue (lastrecentprocessedqueue,LRPqueue), processing queue is preserved the earth magnetism that current geomagnetic sensor was processed recently recentlyData, recently processing queue keeps constant size, according to the first-in first-out rule team that joins the team out,In the time having the geomagnetic data of capable of regulating state to join the team, calculate the error of a current queue,Reach after predetermined length in queue, the error of calculation in the time that each geomagnetic data goes out group, if mistakePoor predefined acceptable error, the earth magnetism threshold that foundation calculates for the last time of being greater thanValue is readjusted, until reach receptive phase, geomagnetic data goes out after team, and it is defeatedGo out to next stage system and process.
Step 700: judge whether nearest processing queue reaches predetermined length, if do not reachedTo predetermined length, continue execution step 400; If reach predetermined length, execution step800；
In step 700, the predetermined length of described nearest processing queue refers to nearest processing teamThe quantity of preservable geomagnetic data in row, in embodiments of the present invention, processing queue recentlyCan preserve 5 groups of geomagnetic datas that respective sensor was processed recently, concrete queue length also canSet or adjust according to practical application.
Step 800: calculate the error of nearest processing queue, and judge nearest processing queueWhether error is greater than predefined acceptable error, if the error of processing queue is not recentlyBe greater than predefined acceptable error, execution step 900; If nearest processing queueError is greater than predefined acceptable error, execution step 1000;
Step 900: output judged result is to next stage system;
Step 1000: recalculate this earth magnetism according to the earth magnetism threshold value calculating for the last timeThe earth magnetism threshold value that sensor is corresponding, until error is less than maximum acceptable error.
In step 1000, the account form of calculating earth magnetism threshold value is prior art, the present inventionTo repeat no more.
Referring to Fig. 2, is the structural representation of the earth magnetism threshold value adjustment System of the embodiment of the present inventionFigure. The earth magnetism threshold value adjustment System of the embodiment of the present invention comprises earth magnetism sensing front end system and groundMagnetic detection system, earth magnetism sensing front end system comprises geomagnetic sensor, hardware logic judgement listUnit and repeater, geomagnetic sensor and hardware logic judging unit connect with repeater signal respectivelyConnect, repeater is connected with geomagnetism detecting system; Particularly:
Geomagnetic sensor is for gathering the geomagnetic data of corresponding test point;
Hardware logic judging unit is for judging the equipment state of geomagnetic sensor;
Repeater for geomagnetic sensor and hardware logic judging unit and geomagnetism detecting system itBetween data receiver and forwarding;
Geomagnetism detecting system comprises that parameter configuration module, data read module, first judge mouldPiece, the second judge module, error calculating module and threshold calculation module;
Parameter configuration module is for configuring the systematic parameter of geomagnetism detecting system; Wherein, systemParameter can be obtained from objects outside, also can read from XML configuration file, readsParameter is as system primary condition; Configuration-system parameter comprises maximum relative error, partially minimumPoor Dl, maximum deviation Du, a, b, c, k, m and n, threshold value adjustment model is as follows:
Dl<G(x,y,z)<Du(1)
In formula (1), G (x, y, z)=kxa+myb+nzc, a is more than or equal to 0 realityNumber, b is more than or equal to 0 real number, and c is more than or equal to 0 real number, and k is more than or equal to 1Natural number, m is more than or equal to 1 natural number, and n is more than or equal to 1 natural number, x, y,Z is ground geomagnetic data.
Data read module is for reading the geomagnetic data that repeater is sent into, according to original earth magnetismData judge the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding, and by judged resultThe equipment state of the geomagnetic sensor returning with hardware logic judging unit contrasts, ifTwo equipment states misfit, and the equipment state of this geomagnetic sensor is considered as to capable of regulating shapeState; Wherein, for each test point, geomagnetism detecting system is accepted its corresponding earth magnetism sensing5 tuple geomagnetic datas that device returns (magn_x, magn_y, magn_z, physic_state,Timestamp), first build initial decision function G (x, y, z), along with the input of geomagnetic dataJudge whether above-mentioned formula (1) is set up, if formula (1) establishment, by coincidence formula(1) geomagnetic sensor state is designated as occupied (taken), if formula (1) does not becomeVertical, the geomagnetic sensor state that does not meet formula (1) is designated as to the free time (available).
The first judge module is for adding geomagnetic data the nearest processing queue of corresponding test pointIn, and judge whether the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding is capable of regulatingState, if not capable of regulating state, judges nearest processing queue by the second judge moduleWhether reach predetermined length, if capable of regulating state calculates by error calculating moduleThe error of nearly processing queue; Wherein, geomagnetism detecting system, after startup, passes each earth magnetismThe test point that sensor is corresponding is set up a nearest processing queue, and processing queue is preserved current recentlyThe geomagnetic data that geomagnetic sensor was processed recently, processing queue keeps constant size recently,According to the first-in first-out rule team that joins the team out, whenever the geomagnetic data that has capable of regulating state is joined the teamTime, calculate the error of a current queue, reach after predetermined length in queue, at every turnError of calculation when magnetic data goes out group, if error is greater than predefined acceptable error,Readjust according to the earth magnetism threshold value calculating for the last time, until reach receptive phaseTill, geomagnetic data goes out after team, is outputed to next stage system and processes.
The second judge module is used for judging whether nearest processing queue reaches predetermined length, ifDo not reach predetermined length, data read module continues to read the ground magnetic number that repeater is sent intoAccording to; If reach predetermined length, calculate the mistake of nearest processing queue by error calculating modulePoor; Wherein, the predetermined length of described nearest processing queue refers in nearest processing queue and can protectThe quantity of the geomagnetic data of depositing, in embodiments of the present invention, it is right that nearest processing queue can be preserved5 groups of geomagnetic datas that induction sensor was processed recently, concrete queue length also can be according to realityApplication is set or is adjusted.
Error calculating module is for calculating the error of nearest processing queue, and judgement is processed recentlyWhether the error of queue is greater than predefined acceptable error, if nearest processing queueError is not more than predefined acceptable error, exports judged result to next stage systemSystem; If the error of processing queue is greater than predefined acceptable error recently, pass through thresholdValue computing module recalculates earth magnetism threshold value;
Threshold calculation module is for recalculating according to the earth magnetism threshold value calculating for the last timeThe earth magnetism threshold value that this geomagnetic sensor is corresponding, until error is less than maximum acceptable error isOnly.
Earth magnetism threshold adjustment methods and the system of the embodiment of the present invention are read by geomagnetism detecting systemGet the geomagnetic data that repeater is sent into, judge this geomagnetic data correspondence according to magnetic data primitivelyThe equipment state of geomagnetic sensor, and result of determination and hardware logic judging unit are returnedThe equipment state of geomagnetic sensor contrast, improved the identification of geomagnetic sensor stateAccuracy rate; And based on existing self adaptation adjustment model, can realize the quick of earth magnetism threshold valueAdjust, eliminated the hysteresis quality that earth magnetism threshold value is adjusted.
The foregoing is only preferred embodiment of the present invention, not in order to limit thisBright, all any amendments of doing within the spirit and principles in the present invention, be equal to replace and changeEnter etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an earth magnetism threshold adjustment methods, comprises the following steps:
Step a: gather the geomagnetic data of corresponding test point by geomagnetic sensor, and incite somebody to action by repeaterGeomagnetic data is forwarded to geomagnetism detecting system;
Step b: read by geomagnetism detecting system the geomagnetic data that repeater is sent into, according to original earth magnetismData judge the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding, and judged result and hardware are patrolledThe equipment state of the geomagnetic sensor that volume judging unit returns contrasts, if two equipment states are not kissedClose, the equipment state of this geomagnetic sensor is considered as to capable of regulating state;
Step c: geomagnetic data is added in the nearest processing queue of corresponding test point, calculate recently and processThe error of queue, and judge whether the error of nearest processing queue is greater than predefined acceptable error,If the error of processing queue is greater than predefined acceptable error recently, according to calculating for the last timeTo earth magnetism threshold value recalculate the earth magnetism threshold value that this geomagnetic sensor is corresponding.
2. earth magnetism threshold adjustment methods according to claim 1, is characterized in that, described step aBefore also comprise: the systematic parameter of configuration geomagnetism detecting system; Described configuration-system parameter comprises maximal phase pairError, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n, threshold value adjustment model is as follows:
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is more than or equal to 0 real number, and b is largeIn the real number that equals 0, c is more than or equal to 0 real number, and k is more than or equal to 1 natural number, and m is greater thanEqual 1 natural number, n is more than or equal to 1 natural number, and x, y, z is ground geomagnetic data.
3. earth magnetism threshold adjustment methods according to claim 2, is characterized in that, described step aBefore also comprise: connect geomagnetic sensor and the repeater of earth magnetism sensing front end system, guarantee before earth magnetism sensingEnd system can effectively be delivered to geomagnetism detecting system by the geomagnetic data collecting.
4. earth magnetism threshold adjustment methods according to claim 3, is characterized in that, in described stepIn b, described geomagnetism detecting system reads the geomagnetic data that repeater is sent into, and sentences according to magnetic data primitivelyThe equipment state of the geomagnetic sensor that disconnected this geomagnetic data is corresponding specifically comprises: for each test point,Geomagnetism detecting system is accepted its 5 tuple geomagnetic datas that Magnetic Sensor returns accordingly, first builds initialDiscriminant function G (x, y, z), along with the input of geomagnetic data judges whether described threshold value adjustment model is set up, asFruit threshold value adjustment model is set up, the geomagnetic sensor state that meets threshold value adjustment model is designated as occupied,If threshold value adjustment model is false, the geomagnetic sensor state that does not meet threshold value adjustment model is designated as to skyNot busy.
5. earth magnetism threshold adjustment methods according to claim 4, is characterized in that, described step cAlso comprise: in the time having geomagnetic data to add nearest processing queue, judge that the earth magnetism that this geomagnetic data is corresponding passesWhether the equipment state of sensor is capable of regulating state, and if not capable of regulating state, team is processed in judgement recentlyWhether row reach predetermined length; If capable of regulating state, calculate the error of nearest processing queue.
6. earth magnetism threshold adjustment methods according to claim 5, is characterized in that, described step cAlso comprise: judge that whether nearest processing queue reaches predetermined length, if do not reach predetermined length, continuesResume studies and get the geomagnetic data that repeater is sent into; If reach predetermined length, calculate nearest processing queueError.
7. an earth magnetism threshold value adjustment System, is characterized in that, comprises earth magnetism sensing front end system and groundMagnetic detection system, described earth magnetism sensing front end system comprise geomagnetic sensor, hardware logic judging unit andRepeater, geomagnetic sensor is connected with repeater signal respectively with hardware logic judging unit, repeater withGeomagnetism detecting system connects;
Described geomagnetic sensor is for gathering the geomagnetic data of corresponding test point;
Described hardware logic judging unit is for judging the equipment state of geomagnetic sensor;
Described repeater is used between geomagnetic sensor and hardware logic judging unit and geomagnetism detecting systemData receiver and forwarding;
Described geomagnetism detecting system is for reading the geomagnetic data that repeater is sent into, according to magnetic data primitivelyJudge the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding, and judged result and hardware logic are sentencedThe equipment state of the geomagnetic sensor that disconnected unit returns contrasts, if two equipment states misfit,The equipment state of this geomagnetic sensor is considered as to capable of regulating state; And geomagnetic data is added to corresponding test pointNearest processing queue in, calculate the error of nearest processing queue, judge that the error of nearest processing queue isNoly be greater than predefined acceptable error, if recently the error of processing queue be greater than predefined canAccept error, recalculate this geomagnetic sensor according to the earth magnetism threshold value calculating for the last time correspondingEarth magnetism threshold value.
8. earth magnetism threshold value adjustment System according to claim 7, is characterized in that, described earth magnetism inspectionExamining system also comprises that parameter configuration module, data read module, the first judge module, second judge mouldPiece, error calculating module and threshold calculation module;
Described parameter configuration module is for configuring the systematic parameter of geomagnetism detecting system;
Described data read module is for reading the geomagnetic data that repeater is sent into, according to magnetic data primitivelyJudge the equipment state of the geomagnetic sensor that this geomagnetic data is corresponding, and judged result and hardware logic are sentencedThe equipment state of the geomagnetic sensor that disconnected unit returns contrasts, if two equipment states misfit,The equipment state of this geomagnetic sensor is considered as to capable of regulating state;
Described the first judge module is used for geomagnetic data to add the nearest processing queue of corresponding test point,And whether the equipment state that judges the geomagnetic sensor that this geomagnetic data is corresponding be capable of regulating state, if notBe capable of regulating state, judge by the second judge module whether nearest processing queue reaches predetermined length, asFruit is capable of regulating state, calculates the error of nearest processing queue by error calculating module;
Described the second judge module is used for judging whether nearest processing queue reaches predetermined length, if do not hadReach predetermined length, data read module continues to read the geomagnetic data that repeater is sent into; If reachedPredetermined length, calculates the error of nearest processing queue by error calculating module;
Described error calculating module is used for calculating the error of nearest processing queue, and judges nearest processing queueError whether be greater than predefined acceptable error, if recently the error of processing queue is not more than in advanceThe acceptable error of first setting, exports judged result to next stage system; If nearest processing queueError is greater than predefined acceptable error, and passing threshold computing module recalculates earth magnetism threshold value;
Described threshold calculation module is for recalculating this ground according to the earth magnetism threshold value calculating for the last timeThe earth magnetism threshold value that Magnetic Sensor is corresponding, until error is less than maximum acceptable error.
9. earth magnetism threshold value adjustment System according to claim 8, is characterized in that, described configuration isSystem parameter comprises maximum relative error, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n,Threshold value adjustment model is as follows:
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is more than or equal to 0 real number, and b is largeIn the real number that equals 0, c is more than or equal to 0 real number, and k is more than or equal to 1 natural number, and m is greater thanEqual 1 natural number, n is more than or equal to 1 natural number, and x, y, z is ground geomagnetic data.
10. earth magnetism threshold value adjustment System according to claim 9, is characterized in that described dataRead module reads the geomagnetic data that repeater is sent into, and judges this geomagnetic data pair according to magnetic data primitivelyThe equipment state of the geomagnetic sensor of answering specifically comprises: for each test point, geomagnetism detecting system connectsBe subject to its 5 tuple geomagnetic datas that Magnetic Sensor returns accordingly, first build initial decision functionG (x, y, z), along with the input of geomagnetic data judges whether described threshold value adjustment model is set up, if threshold value is adjustedIntegral mould set up, the geomagnetic sensor state that meets threshold value adjustment model is designated as occupied, if threshold valueAdjustment model is false, and the geomagnetic sensor state that does not meet threshold value adjustment model is designated as to the free time.
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