CN102930741A - High-precision stall detection system and method - Google Patents
High-precision stall detection system and method Download PDFInfo
- Publication number
- CN102930741A CN102930741A CN2012104109771A CN201210410977A CN102930741A CN 102930741 A CN102930741 A CN 102930741A CN 2012104109771 A CN2012104109771 A CN 2012104109771A CN 201210410977 A CN201210410977 A CN 201210410977A CN 102930741 A CN102930741 A CN 102930741A
- Authority
- CN
- China
- Prior art keywords
- parking stall
- stall
- parking
- parking space
- space detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to a high-precision stall detection system and method. The high-precision stall detection system by comprising a stall detection server, a wireless stall detection network and stall detectors, wherein the stall server is connected with the stall detectors through the wireless stall detection network, at least two stall detectors are arranged on each stall, and a certain distance is maintained between the stall detectors. The method comprises the steps that: 1, at least two stall detectors on the same stall simultaneously acquire data through respective geomagnetic sensors and send data to the stall detection server through an AP in the stall detection network; and 2, the stall detection server receives the data of the at least two stall detectors on the same stall and then carries out judgment by using comprehensive information of the at least two stall detectors. The high-precision stall detection system is reasonable in design, solves the problem of detection blind region when a vehicle is remained on a zero counteracting point of the stall detectors, is increased in accuracy rate of stall detection, and fills up the blank of a stall detection technology.
Description
Technical field
The invention belongs to parking stall measure technology technical field, especially a kind of high precision parking stall measure system and detection method thereof.
Background technology
Utilizing geomagnetic sensor to carry out parking stall measure is emerging in recent years a kind of parking stall measure mode, is widely used in parking lot management.When the parking space detector that geomagnetic sensor is installed utilizes Geomagnetic signal to carry out parking stall measure, it is installed under the surface, parking stall, when having vehicle to sail into and leaving the parking stall, the variation of parking space detector base area sense surrounding magnetic field signal detects the arrival of vehicle and leaves, and behind signal stabilization, this signal is sent to receiving trap.Along with deepening continuously of using, the interference that it is found that external environment usually causes the reduction of accuracy of detection, for example, when the reference value of parking space detector when temperature is drifted about, Geomagnetic signal self constantly changes and high-intensity magnetic field disturbs on every side, the precision that geomagnetic sensor detects the parking stall will reduce.Detect the precision of parking stall in order to improve geomagnetic sensor, people have proposed the means of various raising accuracy of detection, for example: 1, Z axis mean value method, when the one group of Geomagnetic signal that gathers when three axles are unstable, by obtaining peak value twice in Z week, get again its mean value and reach the effect of accurate detection; 2, based on the orientable detection algorithm of process: the magnetic field reference value of this algorithm and parking space detector position is irrelevant, it detects by the correlation parameter of simultaneously analysis and the feature extraction of magnetic resistance parking space detector both direction component being finished vehicle, broken away from the dependence to predetermined threshold value, have higher accuracy and better adaptability, solved the problem that affects accuracy of detection when the reference value of parking space detector along with temperature generation drift.
But, the sight that above-mentioned geomagnetic parking stall detection method all will improve the vehicle detection precision concentrates on the problem that solves external environmental interference, and ignored in the problem that also can have a strong impact on accuracy of detection in the noiseless situation of normality: namely do not having external interference, in other words in the negligible situation of external environmental interference, when vehicle by chance is parked on the zero compensation point of parking space detector, although car is arranged on the parking stall, but can't detect all the time, formed the blind area in the parking stall measure.This phenomenon has perplexed the technician for a long time, does not recognize for above-mentioned reasons all the time and causes, and therefore, the parking stall measure precision is difficult to be improved.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of high precision parking stall measure system and detection method thereof are provided, solved stoppage of vehicle and caused the problem that detects the blind area at the zero compensation point of parking space detector.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of high precision parking stall measure system, comprise parking stall measure server, wireless parking stall Sampling network and parking space detector, the parking stall server is connected with parking space detector by wireless parking stall Sampling network, parking space detector is installed on the parking stall, the parking space detector that install each parking stall is at least two, maintains a certain distance between the parking space detector.
And the parking space detector on described each parking stall is installed in around the central point of parking stall.
And described parking space detector is preferably 0.5 meter to 1.5 meters apart from the distance of parking stall central point.
And the quantity of described parking space detector is preferably two, and two parking space detectors are installed in along the central point both sides, parking stall on the length direction center line of parking stall.
And, described parking space detector comprises CPU module, wireless communication module, geomagnetic sensor module and power management module, CPU module is connected with wireless communication module and geomagnetic sensor module respectively by the I/O interface, and power management module is connected with CPU module, wireless communication module, geomagnetic sensor module provides power supply for modules.
A kind of high precision method for detecting parking stalls may further comprise the steps:
⑴ geomagnetic sensor module image data and the AP in the parking stall measure network that at least two parking space detectors on the same parking stall pass through separately simultaneously send data to the parking stall measure server;
⑵ after parking stall measure server is received the data of at least two parking space detectors on the same parking stall, judge with the integrated information of at least two parking space detectors.
And described integrated information is carried out determination methods and comprised: if when the data of all parking space detector collections are without car data, then this parking stall is without the car state, otherwise this parking stall is for there being the car state.
Advantage of the present invention and good effect are:
1, the present invention installs at least two parking space detectors in each parking stall, when vehicle is parked in magnetic field when upper for the central point of a parking space detector front, rear, left and right symmetry (zero compensation point), mistake with the previous parking space detector of output calibration of other parking space detectors, thereby solved stoppage of vehicle and caused the problem that detects the blind area at the zero compensation point of parking space detector, improved the accuracy rate of parking stall measure.
2, the present invention jumps out the category (sight that will improve the vehicle detection precision concentrates on the problem that solves external environmental interference) of traditional concept, solved people in the parking stall measure technology and be difficult to for a long time the technical barrier of capturing, for the parking stall measure technical field has been filled up blank.
Description of drawings
Fig. 1 is system of the present invention connection diagram;
Fig. 2 is the installation site schematic diagram of parking space detector of the present invention;
Fig. 3 is the circuit block diagram of parking space detector of the present invention;
Fig. 4 is that vehicle affects schematic diagram to what the magnetic field of the earth produced when entering the parking stall;
Fig. 5 is the schematic diagram that vehicle is parked in parking space detector zero compensation point;
Fig. 6 is that vehicle affects schematic diagram to what the magnetic field of the earth produced when leaving the parking stall;
Fig. 7 uses two mutual error correction schematic diagram of parking space detector (zero compensation point is symmetrical before and after showing);
Fig. 8 uses two mutual error correction schematic diagram of parking space detector (zero compensation point shows left-right symmetric).
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is further described:
A kind of high precision parking stall measure system, as shown in Figure 1, comprise two parking space detectors that are at least of installing on parking stall measure server, wireless parking stall Sampling network and each parking stall, the parking stall measure server is connected with each parking space detector by wireless parking stall Sampling network, parking space detector is installed in around the central point of parking stall, and the parking stall measure server detects to judge on the parking stall whether park a car simultaneously to a plurality of parking stall measure on each parking stall.The quantity of the parking space detector of installing on each parking stall is preferably 2, the below describes as an example of two parking space detectors of each parking stall installation example, as shown in Figure 2, two parking space detectors on each parking stall are installed in the both sides of parking stall central point, suppose that the size of rectangle parking stall is similar to the size of dolly, along its length center line is installed two parking space detectors in the rectangle parking stall, the installation site of two parking space detectors generally take near the suitable part at the two ends of rectangle parking stall as best, one, two places that wheel is magnetic field concentration of car, parking space detector is installed and thereunder is convenient to detect immediately, they are two years old, parking space detector is closer apart from the barnyard at vehicle body two, be convenient to the wireless telecommunications between parking space detector and the parking stall measure server, therefore parking space detector should be not less than 0.5 meter apart from the edge at two ends, and 0.5 meter is similar to wheel to the size of the tailstock; Two parking space detectors separately the installation site of the square central point of distance between 0.5 meter to 1.5 meters, to be not less than 0.5 meter as best, the distance of two additions is to be not less than 1 meter as best, if two parking space detectors are near the central point of car, not only weaken communication effect, also can cause the zero compensation point state of parking space detector; Parking space detector is installed on and is not more than 20 centimeters parts under the shallow surface is best.
As shown in Figure 3, parking space detector comprises CPU module, wireless communication module, geomagnetic sensor module and power management module, CPU module is connected with wireless communication module and geomagnetic sensor module respectively by the I/O interface, and power management module is connected with CPU module, wireless communication module, geomagnetic sensor module provides power supply for modules.Parking space detector is connected with the parking stall server by wireless communication mode as the node in the Sampling network of wireless parking stall, realizes the data communication facility of parking space detector data and parking stall measure server.
The below describes the principle of work of parking stall measure system:
1, scientific experimental data shows, the zero compensation point of geomagnetic parking stall detector is really to exist.As shown in Figure 4, when a car drove towards geomagnetic parking stall detector from left to right, a sinusoidal curve of parking space detector output: that point of the centre that sinusoidal curve and time shaft intersect just was referred to as the zero compensation point of parking space detector.The generation of zero compensation point as shown in Figure 5, refer to when vehicle just in time becomes a line with sensor, magnetic line of force front, rear, left and right in the parking space detector sensing range are stressed evenly at this moment, obtained by the resolution of force principle: when certain point stressed when even all around, make a concerted effort is zero, be zero because make a concerted effort, so the magnetic line of force on this aspect can not be partial to that any direction is crooked and the maintenance original state is constant.This is referred to as the zero compensation point of parking space detector, and when vehicle was parked on zero compensation point, the changes of magnetic field amount by vehicle was similar during with beginning, and the sensor curve of output turns back to initial value.Leave the zero compensation point of parking space detector when vehicle, and the left of deflection parking space detector or deflection parking space detector are when right-hand, because the magnetic line of force in the parking space detector sensing range is stressed non-vanishing with joint efforts at this moment, therefore, the magnetic line of force or crooked or crooked to the right left.The impact that when as shown in Figure 4, vehicle enters the magnetic field of the earth is produced.When do not have automobile storage the time, the magnetic field of sensor output background is as its initial value.When vehicle approach was arranged, the magnetic line of force of terrestrial magnetic field will be partial to ferromagnetic vehicle.If the sensitive axes of Magnetic Sensor is pointed to the right side, and vehicle is to travel from left to right, what magnetometer at first " was seen " so is the magnetic field of weakening, because the more magnetic line of force bends towards the vehicle that head-on comes.So from the initial value of sensor, first distortion of the thing followed is curve deflection negative direction.The magnetic line of force is partial to ferromagnetic vehicle principle: interference iron block (car) cutting magnetic line to the magnetic field of the earth when vehicle enters produces magnetic field, and this magnetic field and magnetic field of the earth attract each other, and be non-vanishing with joint efforts left, so the magnetic line of force is crooked left.Show such as Fig. 6, when vehicle was crossed parking space detector zero compensation point and continued to the right, the magnetic line of force will be along pros' deflection vehicle of sensitive axes.So the output of sensor will increase on the basis of initial value.When vehicle during away from sensor, sensor output returns to initial value.
2, the present invention gathers the testing result of at least two parking space detectors simultaneously by the parking stall measure server, reaches the purpose of mutual correction.Such as Fig. 7, shown in Figure 8, when a car by chance be parked in magnetic field for the central point of parking space detector front, rear, left and right symmetry on the time, this parking space detector will can't detect vehicle, and output error is judged, but the zero compensation point of parking space detector only has one, if one is, another must not be therefore to correct the improper value of zero compensation point parking space detector with the output valve of another one parking space detector.
Based on above-mentioned principle, a kind of high precision method for detecting parking stalls may further comprise the steps:
⑴ geomagnetic sensor module image data and the AP in the parking stall measure network that at least two parking space detectors on the same parking stall pass through separately simultaneously send data to the parking stall measure server;
⑵ after parking stall measure server is received the data of at least two parking space detectors on the same parking stall, judge with the integrated information of at least two parking space detectors.
When the parking stall measure server had or not car to judge, the decision method of employing comprised: when one of them was zero compensation point when at least two parking space detectors, other parking space detectors must be the non-zero compensation point; And adopt at least two parking space detectors to correct a mistake mutually: when a parking space detector generation zero crossing mistake, the mistake of correcting previous parking space detector with the output valve of other parking space detectors; Simultaneously, parking stall measure server integrated information is carried out determination methods: when in the parking space detector on the parking stall any has been output as car, then the parking stall measure server judges that current parking stall is for there being the car state, only have when the output of all parking space detectors is without car, the parking stall measure server judges that just current parking stall is without the car state.
It is emphasized that; embodiment of the present invention is illustrative; rather than determinate; therefore the present invention is not limited to the embodiment described in the embodiment; every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope of protection of the invention equally.
Claims (7)
1. high precision parking stall measure system, comprise parking stall measure server, wireless parking stall Sampling network and parking space detector, the parking stall server is connected with parking space detector by wireless parking stall Sampling network, parking space detector is installed on the parking stall, it is characterized in that: the parking space detector that install each parking stall is at least two, maintains a certain distance between the parking space detector.
2. high precision parking stall measure according to claim 1 system, it is characterized in that: the parking space detector on described each parking stall is installed in around the central point of parking stall.
3. high precision parking stall measure according to claim 2 system, it is characterized in that: described parking space detector is preferably 0.5 meter to 1.5 meters apart from the distance of parking stall central point.
4. high precision parking stall measure according to claim 1 and 2 system, it is characterized in that: the quantity of described parking space detector is preferably two, and two parking space detectors are installed in along the central point both sides, parking stall on the length direction center line of parking stall.
5. high precision parking stall measure according to claim 1 and 2 system, it is characterized in that: described parking space detector comprises CPU module, wireless communication module, geomagnetic sensor module and power management module, CPU module is connected with wireless communication module and geomagnetic sensor module respectively by the I/O interface, and power management module is connected with CPU module, wireless communication module, geomagnetic sensor module provides power supply for modules.
6. detection method such as claim 1 to 5 high precision parking stall measure system as described in each is characterized in that: may further comprise the steps:
⑴ geomagnetic sensor module image data and the AP in the parking stall measure network that at least two parking space detectors on the same parking stall pass through separately simultaneously send data to the parking stall measure server;
⑵ after parking stall measure server is received the data of at least two parking space detectors on the same parking stall, judge with the integrated information of at least two parking space detectors.
7. high precision method for detecting parking stalls according to claim 6, it is characterized in that: described integrated information is carried out determination methods and is comprised: if when the data of all parking space detector collections are without car data, then this parking stall is without the car state, otherwise this parking stall is for there being the car state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410977.1A CN102930741B (en) | 2012-10-24 | 2012-10-24 | Method for detecting high high-precision parking space detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410977.1A CN102930741B (en) | 2012-10-24 | 2012-10-24 | Method for detecting high high-precision parking space detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102930741A true CN102930741A (en) | 2013-02-13 |
| CN102930741B CN102930741B (en) | 2015-01-21 |
Family
ID=47645528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210410977.1A Active CN102930741B (en) | 2012-10-24 | 2012-10-24 | Method for detecting high high-precision parking space detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102930741B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104200701A (en) * | 2014-08-26 | 2014-12-10 | 刘征 | Parking space detection comprehensive judgment method |
| CN104867355A (en) * | 2015-05-08 | 2015-08-26 | 无锡普智联科高新技术有限公司 | Device and method thereof for solving internal magnetization problem of geomagnetic parking spot detector |
| CN104916159A (en) * | 2015-03-25 | 2015-09-16 | 北京长城金点物联网科技股份有限公司 | Vehicle detection method and detection system |
| CN105825705A (en) * | 2016-01-04 | 2016-08-03 | 杨彦兵 | Parking stall detecting and guiding system and method |
| CN106530812A (en) * | 2016-12-02 | 2017-03-22 | 杭州维昕科技有限公司 | AMR-based double-terrestrial magnetism vehicle detection method and device |
| CN107464449A (en) * | 2017-08-31 | 2017-12-12 | 孙嘉磷 | It is a kind of to utilize the unattended self-service parking system intelligently locked |
| CN107749173A (en) * | 2017-10-10 | 2018-03-02 | 深圳普智联科机器人技术有限公司 | A kind of more ground magnetic chip parking space detector |
| CN110400485A (en) * | 2018-04-24 | 2019-11-01 | 中兴通讯股份有限公司 | Method, apparatus, server and the storage medium of parking stall state-detection |
| CN113570874A (en) * | 2021-09-07 | 2021-10-29 | 深圳市捷顺科技实业股份有限公司 | Parking detection method, device and equipment and vehicle detector |
| CN114255600A (en) * | 2022-01-26 | 2022-03-29 | 杭州海康威视数字技术股份有限公司 | Parking detection method, parking detection equipment and storage medium |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008061099A2 (en) * | 2006-11-13 | 2008-05-22 | Noel Ii Phares A | Space monitoring detector |
| CN201111734Y (en) * | 2007-09-06 | 2008-09-10 | 浙江银江电子股份有限公司 | Double-probe parking yard parking space guidance system harvester |
| WO2009060651A1 (en) * | 2007-11-08 | 2009-05-14 | Sankyo Electric Co., Ltd. | Vehicle detection method, vehicle detection unit, and vehicle detection device |
| CN102324188A (en) * | 2011-07-15 | 2012-01-18 | 广州市捷众科贸有限公司 | Buried parking space detector |
| CN102522000A (en) * | 2011-12-16 | 2012-06-27 | 广东朗视光电技术有限公司 | Magnetostatic field fluxgate parking space detection system |
| WO2012086354A1 (en) * | 2010-12-22 | 2012-06-28 | オプテックス株式会社 | Vehicle detection apparatus |
| CN102592471A (en) * | 2011-01-14 | 2012-07-18 | 无锡国科微纳传感网科技有限公司 | Method and device for carrying out parking spot detection by adopting geomagnetism signals |
| CN102722998A (en) * | 2012-05-28 | 2012-10-10 | 北京时代凌宇科技有限公司 | Method for detecting states of parking spaces |
| CN202855081U (en) * | 2012-10-24 | 2013-04-03 | 无锡普智联科高新技术有限公司 | High precision parking space detection system |
-
2012
- 2012-10-24 CN CN201210410977.1A patent/CN102930741B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008061099A2 (en) * | 2006-11-13 | 2008-05-22 | Noel Ii Phares A | Space monitoring detector |
| CN201111734Y (en) * | 2007-09-06 | 2008-09-10 | 浙江银江电子股份有限公司 | Double-probe parking yard parking space guidance system harvester |
| WO2009060651A1 (en) * | 2007-11-08 | 2009-05-14 | Sankyo Electric Co., Ltd. | Vehicle detection method, vehicle detection unit, and vehicle detection device |
| WO2012086354A1 (en) * | 2010-12-22 | 2012-06-28 | オプテックス株式会社 | Vehicle detection apparatus |
| CN102592471A (en) * | 2011-01-14 | 2012-07-18 | 无锡国科微纳传感网科技有限公司 | Method and device for carrying out parking spot detection by adopting geomagnetism signals |
| CN102324188A (en) * | 2011-07-15 | 2012-01-18 | 广州市捷众科贸有限公司 | Buried parking space detector |
| CN102522000A (en) * | 2011-12-16 | 2012-06-27 | 广东朗视光电技术有限公司 | Magnetostatic field fluxgate parking space detection system |
| CN102722998A (en) * | 2012-05-28 | 2012-10-10 | 北京时代凌宇科技有限公司 | Method for detecting states of parking spaces |
| CN202855081U (en) * | 2012-10-24 | 2013-04-03 | 无锡普智联科高新技术有限公司 | High precision parking space detection system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104200701B (en) * | 2014-08-26 | 2016-03-02 | 刘征 | A kind of parking stall measure synthetic determination method |
| CN104200701A (en) * | 2014-08-26 | 2014-12-10 | 刘征 | Parking space detection comprehensive judgment method |
| CN104916159B (en) * | 2015-03-25 | 2017-04-05 | 北京长城金点物联网科技股份有限公司 | A kind of vehicle checking method and detecting system |
| CN104916159A (en) * | 2015-03-25 | 2015-09-16 | 北京长城金点物联网科技股份有限公司 | Vehicle detection method and detection system |
| CN104867355A (en) * | 2015-05-08 | 2015-08-26 | 无锡普智联科高新技术有限公司 | Device and method thereof for solving internal magnetization problem of geomagnetic parking spot detector |
| CN104867355B (en) * | 2015-05-08 | 2017-03-15 | 无锡普智联科高新技术有限公司 | A kind of devices and methods therefor for solving the problems, such as geomagnetic parking stall detector internal magnetization |
| CN105825705A (en) * | 2016-01-04 | 2016-08-03 | 杨彦兵 | Parking stall detecting and guiding system and method |
| CN106530812A (en) * | 2016-12-02 | 2017-03-22 | 杭州维昕科技有限公司 | AMR-based double-terrestrial magnetism vehicle detection method and device |
| CN107464449A (en) * | 2017-08-31 | 2017-12-12 | 孙嘉磷 | It is a kind of to utilize the unattended self-service parking system intelligently locked |
| CN107749173A (en) * | 2017-10-10 | 2018-03-02 | 深圳普智联科机器人技术有限公司 | A kind of more ground magnetic chip parking space detector |
| CN110400485A (en) * | 2018-04-24 | 2019-11-01 | 中兴通讯股份有限公司 | Method, apparatus, server and the storage medium of parking stall state-detection |
| CN113570874A (en) * | 2021-09-07 | 2021-10-29 | 深圳市捷顺科技实业股份有限公司 | Parking detection method, device and equipment and vehicle detector |
| CN114255600A (en) * | 2022-01-26 | 2022-03-29 | 杭州海康威视数字技术股份有限公司 | Parking detection method, parking detection equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102930741B (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102930741B (en) | Method for detecting high high-precision parking space detection system | |
| CN202855081U (en) | High precision parking space detection system | |
| CN104200701B (en) | A kind of parking stall measure synthetic determination method | |
| CN102881171B (en) | Vehicle detecting method, vehicle detecting system and vehicle path planning system | |
| CN103236189B (en) | Parking space detection method and system | |
| CN102722987B (en) | Roadside parking space detection method | |
| CN103942965B (en) | geomagnetic vehicle detector | |
| CN105825708A (en) | Parking space state judgment method of geomagnetic vehicle detector | |
| CN104112359B (en) | A kind of type of vehicle based on bias magnetic field, speed detector | |
| CN202404768U (en) | Roadside parking space detecting system | |
| CN104864909A (en) | Road surface pothole detection device based on vehicle-mounted binocular vision | |
| CN104933871B (en) | Method and system for detecting traffic vehicles | |
| CN103680151B (en) | Ground magnetic-type drive test sensor and its implementation | |
| CN104112360B (en) | A kind of vehicle based on bias magnetic field delay unloading solid line grasp shoot device and method of work | |
| CN107757397A (en) | A kind of control device and method for correcting automobile wireless charging bit errors | |
| CN103456178A (en) | Road vehicle speed measuring system | |
| CN109839634A (en) | A kind of subject fusion method of vehicle-mounted camera and radar | |
| CN103914993B (en) | A kind of intelligent parking detection method based on magnetic field sensor | |
| CN106710238B (en) | Method for improving accuracy of geomagnetic vehicle detector | |
| CN103456182B (en) | A kind of road edge detection method based on distance measuring sensor and system thereof | |
| CN103983239B (en) | Based on the distance-finding method of the wide line in track | |
| CN103963723B (en) | The acquisition system of effective speed of vehicle and acquisition methods thereof | |
| CN107161158A (en) | A kind of lane departure warning method based on Hall magnetic induction principle | |
| CN204537445U (en) | A kind of track congestion index analytic system in real time | |
| CN105825682A (en) | Geomagnetic vehicle detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180810 Address after: 523808 Yishili Science and Technology Office Building, No. 9 Headquarters, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province - B3-09, 3rd floor, R&D building Patentee after: Dongguan Pama Intelligent Parking Service Co., Ltd. Address before: 214135 floor 4, block A, whale block, Wuxi (National) software park, 18, Zhen Ze Road, Wuxi New District, Jiangsu. Patentee before: Wuxi Puzhilianke High-tech Co., Ltd. |
|
| TR01 | Transfer of patent right |