CN109360424A - A kind of vehicle detection apparatus and method based on artificial magnetic field - Google Patents
A kind of vehicle detection apparatus and method based on artificial magnetic field Download PDFInfo
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- CN109360424A CN109360424A CN201811007906.0A CN201811007906A CN109360424A CN 109360424 A CN109360424 A CN 109360424A CN 201811007906 A CN201811007906 A CN 201811007906A CN 109360424 A CN109360424 A CN 109360424A
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- magnetic field
- vehicle
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- magnetic
- manufacturing device
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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
-
- 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
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
Abstract
The invention discloses a kind of vehicle detection apparatus and method based on artificial magnetic field, including magnetic field manufacturing device and magnetic field induction device, magnetic field manufacturing device and magnetic field induction device opposite two sides that lane or parking lot passageway are set respectively, magnetic field manufacturing device and magnetic field induction device are that detachable apparatus, magnetic field manufacturing device and magnetic field induction device and lane or parking lot passageway are formed by the magnetic field strength in region higher than earth's magnetic field.The present invention replaces earth's magnetic field using manual construction magnetic field, and sensor detection is sensitiveer；Geomagnetic sensor need not be buried in below ground, and road pavement is destroyed small；Vehicle can be distinguished using artificial magnetic field and geomagnetic sensor cooperation, calculates the vehicle parking time；Magnetic field manufacturing device and geomagnetic sensor are located at road or parking lot both sides, can be easy to disassemble.
Description
Technical field
The invention mainly relates to field of intelligent transportation technology, and in particular to a kind of vehicle detection apparatus based on artificial magnetic field
And method.
Background technique
Intelligent transportation system is widely applied in China, and vehicle detection is the component part of intelligent transportation system, is led to
It crosses vehicle detection mode and acquires effective Traffic Information, obtain the magnitude of traffic flow, speed, roadway occupancy, following distance, vehicle
The basic datas such as type purposefully realize monitoring, control, analysis, decision, dispatch and dredge.Currently, the kind of wagon detector
There are many class, detected if any Coil Detector, video detection, microwave detection, laser detection, sonic detection, ultrasound examination, magnetic force,
Infrared detection etc..
But these wagon detectors have obvious disadvantage: Coil Detector changes according to the inductance of vehicle arrival coil
Judge whether vehicle arrives, it is single that there are traffic datas, buries and ground is larger to ground failure, and it is easy to damage, by ground quality
It influences；Video detection by image processing techniques analyze traffic condition, obtain traffic data, have it is at high cost, vulnerable to weather etc.
Such environmental effects；By the cline frequency modulated microwave signal of transmitting low energy, processing echo-signal, which obtains, to be handed over for microwave detection
Logical data, there are errors caused by speed；Laser detection precision is high, but laser detection has injury to human body, mainly to human eye
Damage；Sonic detection judges information of vehicles by ultrasonic reflections, but ultrasonic wave mounting condition is harsh and the service life is shorter；Magnetic force
Detection can disturbance according to some ferromagnetic objects to earth magnetism, to detect the presence of vehicle, there are precision when vehicle comparatively dense is small
The problems such as；Infrared detection generates modulation pulse by modulation pulse generator, radiates through infrared probe on road, when there is vehicle
By when, infrared pulse reflects the reception pipe popped one's head in from car body and receives, and passes through choosing again through the demodulation of infrared demodulator
Triggering driver exports a detection signal after logical, amplification, rectification and filtering, detection error caused by influencing there are weather.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of vehicle detection apparatus based on artificial magnetic field and sides
Method.
In order to achieve the above object, the invention adopts the following technical scheme: a kind of vehicle detection dress based on artificial magnetic field
It sets, including magnetic field manufacturing device and magnetic field induction device, the magnetic field manufacturing device and magnetic field induction device are oppositely arranged on vehicle
The two sides in road or parking lot passageway, the magnetic field manufacturing device and magnetic field induction device are detachable apparatus, the magnetic field system
It makes the magnetic field strength that device and magnetic field induction device and lane or parking lot passageway are formed by region and is higher than earth's magnetic field；
The magnetic field manufacturing device is used for manufacture of intraocular magnetic field, and the magnetic field induction device is for induced magnetic field and to handle magnetic field strong
Degree, the artificial magnetic field direction are that magnetic field manufacturing device is directed toward magnetic field induction device；
The magnetic field induction device includes power supply, geomagnetic sensor, filter, amplifier, radio-frequency device and central processing
Module, the geomagnetic sensor for detecting magnetic field, magnetic field wave of the filter for that will be transmitted from geomagnetic sensor into
Row filtering, for the amplifier for amplifying the magnetic field wave of filtering, the central processing module is used for the magnetic field that will amplify
Wave carries out digital-to-analogue conversion, and the radio-frequency device judges that information is sent for the specific magnetic fields numerical value after converting and tentatively
To terminal server.
Preferably, the magnetic field manufacturing device is made of permanent magnet or hot-wire coil, the magnetic field manufacturing device is used for
Manufacture is parallel to the artificial magnetic field on ground.
Preferably, the artificial magnetic field of the magnetic field manufacturing device manufacture is in normal vehicle operation region intrinsic inductance
Range is 0.6 ~ 1.2T, the magnetic induction intensity range of set value of the artificial magnetic field of magnetic field manufacturing device manufacture according to lane or
The width in parking lot passageway and the mounting height of device are adjusted and are sized no more than 0.5T.
Preferably, the magnetic induction intensity range within the scope of the magnetic field induction device is 0.1 ~ 0.3T.
The embodiment of the present invention also provides a kind of method using the above-mentioned vehicle detection apparatus based on artificial magnetic field comprising
Following steps:
Step 1: vehicle detection apparatus installation: installing magnetic field manufacturing device in the side in lane or parking lot passageway, in lane or
Magnetic field induction device is installed in the other side in parking lot passageway, opens the power switch of magnetic field manufacturing device and magnetic field induction device；
Step 2: detection changes of magnetic field: after geomagnetic sensors detection to the magnetic field generated by artificial manufacturing device, through wave filter
Filtering, then detection data is passed to central processing module after amplifier amplifies, central processing module is by digital-to-analogue conversion, at timesharing
Judge that information is sent to terminal server by the specific magnetic fields numerical value after conversion and tentatively by radio-frequency device after reason；
Step 3: vehicle detection: there is meeting cutting magnetic line in vehicle, cause magnetic field size and Orientation that great variety occurs, utilize ground
The detection of Magnetic Sensor three-axle magnetic field, detects magnetic field significant change, vehicle driving to magnetic field manufacturing device and detector for magnetic field
Between when, magnetic field size and Orientation can change, the height and magnetic field manufacturing device and detection device placed according to device it
Between width detection range will be different, detector for magnetic field nearby differs by more than 0.1T before and after magnetic field size variation, then sentences
It is set to vehicle process, magnetic direction front and rear angles change more than 20 degree, are also determined as that vehicle passes through；
Step 4: data processing: a large amount of historical datas collected under artificial magnetic field using geomagnetic sensor occur as initial data
Abnormal variation data are then determined as error information, and the magnetic field value such as detected is greater than 1T, then it is assumed that is measured as error information, such as
It detects magnetic field value and is greater than 0.5T in front and back, then it is assumed that be error caused by environmental factor, after excluding error information, then earth magnetism acquired
Data variation value makes a decision, and then determines to detect vehicle greater than predetermined value, is then judged to that vehicle is not detected less than predetermined value.
As a large amount of historical datas preferably collected under artificial magnetic field using geomagnetic sensor as initial data, occur abnormal
Deviation data is then determined as error information, and the magnetic field value such as detected is greater than 1T, then it is assumed that error information is measured as, such as front and back
It detects magnetic field value and is greater than 0.5T, then it is assumed that be error caused by environmental factor, after excluding error information, then data acquired to earth magnetism
Changing value makes a decision, and then determines to detect vehicle greater than predetermined value, is then judged to that vehicle is not detected less than predetermined value.
Preferably, the magnetic force line cutting direction of the cutting artificial magnetic field of vehicle described in step 3 is cut close to vertical cutting
When script direction can be made more dispersed the artificial magnetic field magnetic line of force become to concentrate, the magnetic line of force magnetic field size of concentration will increase, magnetic
Line of force direction can deflect.
The utility model has the advantages that compared with prior art, the invention has the following advantages that the present invention is replaced using manual construction magnetic field
Earth's magnetic field, sensor detection are sensitiveer；Geomagnetic sensor need not be buried in below ground, and road pavement is destroyed small；Using artificial
Magnetic field and geomagnetic sensor cooperation can distinguish vehicle, calculate the vehicle parking time；Magnetic field manufacturing device is located at geomagnetic sensor
Road or parking lot both sides, can be easy to disassemble.
Detailed description of the invention
Magnetic line of force distribution schematic diagram in the presence of Fig. 1 is no vehicle, in artificial magnetic field of the invention；
Fig. 2 is the magnetic line of force distribution schematic diagram in artificial magnetic field of the invention in the presence of having vehicle；
Fig. 3 is the built-in system mechanism map of magnetic field induction device of the invention.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
It the present invention rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention each
The modification of kind equivalent form falls within the application range as defined in the appended claims.
As shown in Figure 1, a kind of vehicle detection apparatus based on artificial magnetic field, including magnetic field manufacturing device 1 and magnetic field induction
Device 2, magnetic field manufacturing device 1 and magnetic field induction device 2 opposite two sides that lane or parking lot passageway are set respectively, magnetic field
Manufacturing device 1 and magnetic field induction device 2 are detachable apparatus, magnetic field manufacturing device 1 and magnetic field induction device 2 and lane or stop
Parking lot passageway is formed by the magnetic field strength in region higher than earth's magnetic field；Magnetic field manufacturing device 1 is used for manufacture of intraocular magnetic field, magnetic field
Sensing device 2 is used to incude and handle and magnetic field strength, and artificial magnetic field direction is that magnetic field manufacturing device 1 is directed toward magnetic field induction device
2；Magnetic field induction device 2 includes power supply, geomagnetic sensor, filter, amplifier, radio-frequency device and central processing module,
Geomagnetic sensor is for detecting magnetic field, and filter is for the magnetic field wave transmitted from geomagnetic sensor to be filtered, amplifier
For amplifying the magnetic field wave of filtering, the magnetic field wave that central processing module is used to amplify carries out digital-to-analogue conversion, wirelessly penetrates
Frequency device is used to by the specific magnetic fields numerical value after conversion and tentatively judge that information is sent to terminal server.Magnetic field manufacturing device
1 is made of permanent magnet or hot-wire coil, and magnetic field manufacturing device 1 is normal in vehicle for manufacturing the artificial magnetic field for being parallel to ground
Running region intrinsic inductance range is 0.6 ~ 1.2T, the magnetic induction intensity setting of the artificial magnetic field of magnetic field manufacturing device manufacture
Value range is adjusted according to the mounting height of the width and device in lane or parking lot passageway and is sized no more than 0.5T.
Magnetic induction intensity range in 2 range of magnetic field induction device is 0.1 ~ 0.3T.
In addition, the present embodiment also provides a kind of method using the above-mentioned vehicle detection apparatus based on artificial magnetic field, such as scheme
Shown in 1-3, include the following steps:
Step 1: device installation: in the side in lane or parking lot passageway, installation magnetic field manufacturing device 1 is in lane or parking lot mistake
Magnetic field induction device 2 is installed in the other side in road, opens the power switch of magnetic field manufacturing device 1 and magnetic field induction device 2；
Step 2: detection changes of magnetic field: after geomagnetic sensors detection to the magnetic field generated by artificial manufacturing device, through wave filter
Filtering, then detection data is passed to central processing module after amplifier amplifies, central processing module is by digital-to-analogue conversion, at timesharing
Judge that information is sent to terminal server by the specific magnetic fields numerical value after conversion and tentatively by radio-frequency device after reason；
Step 3: vehicle detection: there is meeting cutting magnetic line in vehicle, cause magnetic field size and Orientation that great variety occurs, utilize ground
Magnetic Sensor three-axle magnetic field detects advantage, can obviously detect changes of magnetic field, vehicle driving to magnetic field manufacturing device and magnetic field inspection
When surveying between device, magnetic field size and Orientation can change, the height and magnetic field manufacturing device and detection placed according to device
Width detection range between device will be different, and detector for magnetic field nearby differs by more than size variation front and back in magnetic field
0.1T is then determined as that vehicle passes through, and magnetic direction front and rear angles change more than 20 degree, is also determined as that vehicle passes through；
It further include error detection step for the method, a large amount of historical datas collected under artificial magnetic field with geomagnetic sensor are
There are abnormal variation data in initial data, then is determined as error information, and the magnetic field value such as detected is greater than 1T, then it is assumed that measurement
It is greater than 0.5T for error information, such as front and back detection magnetic field value, then it is assumed that be error caused by environmental factor, exclude error information
Afterwards, then to earth magnetism acquisition data variation value it makes a decision, then determines to detect vehicle greater than predetermined value, then be determined as less than predetermined value
Vehicle is not detected.
In addition, the magnetic force line cutting direction of the cutting artificial magnetic field of vehicle described in step 3 is close to vertical cutting, meeting when cutting
The artificial magnetic field magnetic line of force for keeping script direction more dispersed becomes to concentrate, and the magnetic line of force magnetic field size of concentration will increase, the magnetic line of force
Direction can deflect.
The present invention uses the power on coil or a kind of artificial magnetic field of permanent magnet magnet configurations, and magnetic direction is by magnetic field manufacturing device
It is directed toward geomagnetic sensor, magnetic line of force direction and ground are close to parallel, by geomagnetic sensors detection vehicle by cutting magnetic line
Make the magnetic line of force that the variation of size direction occur, variable quantity is more than predetermined value, then judgement detects vehicle.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (7)
1. a kind of vehicle detection apparatus based on artificial magnetic field, it is characterised in that: including magnetic field manufacturing device (1) and magnetic field induction
Device (2), the magnetic field manufacturing device (1) and magnetic field induction device (2) are oppositely arranged on the two sides in lane or parking lot passageway,
The magnetic field manufacturing device (1) and magnetic field induction device (2) are detachable apparatus, the magnetic field manufacturing device (1) and magnetic field
Sensing device (2) and lane or parking lot passageway are formed by the magnetic field strength in region higher than earth's magnetic field；
The magnetic field manufacturing device (1) is used for manufacture of intraocular magnetic field, and the magnetic field induction device (2) is for induced magnetic field and handles
Magnetic field strength, the artificial magnetic field direction are that magnetic field manufacturing device (1) is directed toward magnetic field induction device (2)；
The magnetic field induction device (2) includes power supply, geomagnetic sensor, filter, amplifier, radio-frequency device and centre
Module is managed, the geomagnetic sensor is used for the magnetic field wave that will be transmitted from geomagnetic sensor for detecting magnetic field, the filter
It is filtered, for the amplifier for amplifying the magnetic field wave of filtering, the central processing module is used for the magnetic that will amplify
Field wave carries out digital-to-analogue conversion, and the radio-frequency device judges that information is sent out for the specific magnetic fields numerical value after converting and tentatively
Give terminal server.
2. the vehicle detection apparatus according to claim 1 based on artificial magnetic field, it is characterised in that: the magnetic field manufacture dress
It sets (1) to be made of permanent magnet or hot-wire coil, the magnetic field manufacturing device (1) is for manufacturing the artificial magnetic field for being parallel to ground.
3. the vehicle detection apparatus according to claim 2 based on artificial magnetic field, it is characterised in that: the magnetic field manufacture dress
It is 0.6 ~ 1.2T, magnetic field manufacture that the artificial magnetic field of (1) manufacture, which is set, in normal vehicle operation region intrinsic inductance range
The magnetic induction intensity range of set value of the artificial magnetic field of device manufacturing is according to the peace of the width and device in lane or parking lot passageway
Dress height is adjusted, and is adjusted and be no more than 0.5T.
4. the vehicle detection apparatus according to claim 1 based on artificial magnetic field, it is characterised in that: the magnetic field induction dress
Setting the magnetic induction intensity range in (2) range is 0.1 ~ 0.3T.
5. a kind of vehicle checking method based on artificial magnetic field, which comprises the steps of:
Step 1: vehicle detection apparatus installation: magnetic field manufacturing device (1) being installed in the side in lane or parking lot passageway, in lane
Or magnetic field induction device (2) are installed in the other side in parking lot passageway, open magnetic field manufacturing device (1) and magnetic field induction device (2)
Power switch；
Step 2: detection changes of magnetic field: after geomagnetic sensors detection to the magnetic field generated by artificial manufacturing device, through wave filter
Filtering, then detection data is passed to central processing module after amplifier amplifies, central processing module is by digital-to-analogue conversion, at timesharing
Judge that information is sent to terminal server by the specific magnetic fields numerical value after conversion and tentatively by radio-frequency device after reason；
Step 3: vehicle detection: there is meeting cutting magnetic line in vehicle, cause magnetic field size and Orientation that great variety occurs, utilize ground
The detection of Magnetic Sensor three-axle magnetic field, detects magnetic field significant change, vehicle driving to magnetic field manufacturing device and detector for magnetic field
Between when, magnetic field size and Orientation can change, the height and magnetic field manufacturing device and detection device placed according to device it
Between width detection range will be different, detector for magnetic field nearby differs by more than 0.1T before and after magnetic field size variation, then sentences
It is set to vehicle process, magnetic direction front and rear angles change more than 20 degree, are also determined as that vehicle passes through；
Step 4: data processing: a large amount of historical datas collected under artificial magnetic field using geomagnetic sensor occur as initial data
Abnormal variation data are then determined as error information, and the magnetic field value such as detected is greater than 1T, then it is assumed that is measured as error information, such as
It detects magnetic field value and is greater than 0.5T in front and back, then it is assumed that be error caused by environmental factor, after excluding error information, then earth magnetism acquired
Data variation value makes a decision, and then determines to detect vehicle greater than predetermined value, is then judged to that vehicle is not detected less than predetermined value.
6. the vehicle checking method according to claim 5 based on artificial magnetic field, it is characterised in that: before the step 3
Further include error detecting routine, in particular to: a large amount of historical datas collected under artificial magnetic field with geomagnetic sensor be it is original
There are abnormal variation data in data, then are determined as error information, and the magnetic field value such as detected is greater than 1T, then it is assumed that is measured as missing
Difference data, as front and back detection magnetic field value is greater than 0.5T, then it is assumed that it is error caused by environmental factor, after excluding error information, then
Earth magnetism acquisition data variation value is made a decision, then determines to detect vehicle greater than predetermined value, is then judged to not examining less than predetermined value
Measure vehicle.
7. the vehicle checking method according to claim 5 based on artificial magnetic field, it is characterised in that: vehicle described in step 3
The magnetic force line cutting direction of cutting artificial magnetic field is close to vertical cutting, artificial magnetic that when cutting can make script direction more dispersed
The field magnetic line of force becomes to concentrate, and the magnetic line of force magnetic field size of concentration will increase, and magnetic line of force direction can deflect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811007906.0A CN109360424B (en) | 2018-08-31 | 2018-08-31 | Vehicle detection device and method based on artificial magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811007906.0A CN109360424B (en) | 2018-08-31 | 2018-08-31 | Vehicle detection device and method based on artificial magnetic field |
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| Publication Number | Publication Date |
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| CN109360424A true CN109360424A (en) | 2019-02-19 |
| CN109360424B CN109360424B (en) | 2021-12-10 |
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| CN201811007906.0A Active CN109360424B (en) | 2018-08-31 | 2018-08-31 | Vehicle detection device and method based on artificial magnetic field |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101034496A (en) * | 2007-04-17 | 2007-09-12 | 中国科学院计算技术研究所 | Detecting method and device for communication flow |
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| CN103646553A (en) * | 2013-11-11 | 2014-03-19 | 北京信息科技大学 | Investigation system for road traffic flow and realization method thereof |
| CN105206063A (en) * | 2015-09-25 | 2015-12-30 | 北京理工大学 | Traffic information monitoring signal acquiring device based on GMI sensors and detecting method |
| CN105761497A (en) * | 2013-04-22 | 2016-07-13 | 徐州工程学院 | Vehicle solid line pressing detection method and solid line pressing snapshooting device |
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2018
- 2018-08-31 CN CN201811007906.0A patent/CN109360424B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034496A (en) * | 2007-04-17 | 2007-09-12 | 中国科学院计算技术研究所 | Detecting method and device for communication flow |
| CN101809414A (en) * | 2007-09-28 | 2010-08-18 | 大陆汽车有限责任公司 | Pulse generator for a device, in particular for a tachograph and method for operating said pulse generator |
| CN105761497A (en) * | 2013-04-22 | 2016-07-13 | 徐州工程学院 | Vehicle solid line pressing detection method and solid line pressing snapshooting device |
| CN103646553A (en) * | 2013-11-11 | 2014-03-19 | 北京信息科技大学 | Investigation system for road traffic flow and realization method thereof |
| CN105206063A (en) * | 2015-09-25 | 2015-12-30 | 北京理工大学 | Traffic information monitoring signal acquiring device based on GMI sensors and detecting method |
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| CN109360424B (en) | 2021-12-10 |
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