CN210348811U - Device for detecting whether vehicles exist on berth by utilizing magnetic field - Google Patents
Device for detecting whether vehicles exist on berth by utilizing magnetic field Download PDFInfo
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- CN210348811U CN210348811U CN201920869705.5U CN201920869705U CN210348811U CN 210348811 U CN210348811 U CN 210348811U CN 201920869705 U CN201920869705 U CN 201920869705U CN 210348811 U CN210348811 U CN 210348811U
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Abstract
The utility model discloses an utilize magnetic field to detect device that has or not vehicle on berth, including magnetic sensor, be equipped with the magnet in magnetic sensor's top or below. The utility model discloses utilize magnetic sensor to collect berth magnetic field information, place the magnet in magnetic sensor's top or below and introduce the influence of additional magnetic field in order to offset the irregular change in earth magnetic field to the magnetic field information that magnetic sensor detected. The additional magnetic field intensity of the magnet is quickly attenuated along with the increase of the distance in the surrounding environment, so that the influence of vehicles positioned outside the parking space on the magnetic field information detected by the equipment is greatly reduced, and for the vehicles in the parking space, particularly vehicle body materials positioned closest to the equipment can generate strong changes on the magnetic field information acquired by the equipment, so that the detection precision of whether the vehicle information exists on the parking space is improved.
Description
Technical Field
The utility model particularly relates to a vehicle detection device on berth.
Background
On having the detection of vehicle on the parking, earth magnetism parking stall detector is adopted to present market mostly, and this equipment is installed on the parking stall, and when the vehicle stopped on the parking stall, equipment detected that there is the vehicle to stop on this parking stall, then uploaded the cloud platform to the information of this kind of state, equally when the vehicle leaves the parking stall back parking stall be empty, also can upload relevant information to the server, some and the relevant information of equipment maintenance also can be uploaded to equipment in addition. The information produced by the equipment can be used by a parking charging platform, an intelligent parking system, a map parking space index service and a static traffic system.
The detection principle of the devices on the market is as follows: the parking space has a landing ball magnetic field, the structure of the automobile has some magnetic materials (such as iron structures, steel materials, magnets and the like which can affect the magnetic field), and after the automobile stops at the parking space, the size or the direction of the magnetic field in the parking space can be changed due to the magnetic materials on the automobile. These changes are used as input information to a device, and the device processes information that the magnetic field around the parking space changes due to the entry of the magnetic material in the vehicle, which is excited by the earth magnetic field, and calculates the current parking space state.
However, the above detection principle has a significant defect, which results in low detection precision of the equipment in the market and restricts the development. The reasons for these defects are the following:
for convenience of description, the magnetic field information recorded by the device in the absence of a vehicle in a parking space is called as a magnetic field a, and the main factor influencing the magnetic field a when the parking space is empty is the magnitude and direction of the earth magnetic field at the moment and the position. However, the earth's magnetic field is not constant at this point but varies over time, often to a magnitude that is similar to or greater than the magnitude of the variations that occur when a vehicle arrives.
The first is that, the second is that vehicles moving or standing near the parking space or other substances affecting the magnetic field all affect the magnetic field collected by the equipment, and various factors are superposed to finally cause the equipment to show as follows:
after the equipment records the information of the magnetic field around the vehicle again each time (this is called as the calibration or calibration of the equipment), the detection precision of the equipment is high and can reach more than 90%, but after a period of time (more than one day or less than one day), the detection precision of the equipment can reach 50%, and even whether the vehicle exists or not can not be detected correctly. Of course, if the device is required to detect the vehicle again, the above-mentioned calibration or calibration is also required, which is difficult to be accepted in practical projects and is a main reason for the headache of each company, the customer dissatisfaction and the limited development of the industry.
The reasons for the above problems can be summarized as: the influence of the magnetic field of the vehicle on the location of the device is too small compared to the influence of environmental factors that change irregularly over time on the magnetic field of the location of the device, or is overwhelmed by environmental factors.
Disclosure of Invention
The utility model aims to solve the technical problem that a device and a method for accurately detecting whether a vehicle exists on a berth are provided.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the device for detecting whether vehicles exist on a berth by using a magnetic field comprises a magnetic sensor, a magnet and a shell, wherein the magnet is arranged above or below the magnetic sensor, the magnetic field direction of the magnet is approximately orthogonal to the earth magnetic field, the shell comprises a shell and a cover body, the magnetic sensor is arranged on the cover body, and the magnet is arranged in the shell.
Furthermore, the magnetic sensor is integrated in a circuit board, and a communication unit, a power supply unit and a controller unit are further integrated in the circuit board.
Further, the magnet is a cylindrical magnet and is vertically installed in the installation cavity at the bottom of the shell.
Further, the distance between the magnet and the magnetic sensor is 20mm-400 mm.
Further, the magnet is disposed 90mm below the magnetic sensor.
Furthermore, a magnet is arranged above or below the magnetic field sensor, the magnetic field direction of the magnet is approximately orthogonal to the earth magnetic field, the magnetic sensor is arranged in the shell, and the magnet is arranged on the berth and fixed through the shell.
The utility model discloses an useful part lies in, utilizes magnetic sensor to collect berth magnetic field information, places the magnet in magnetic sensor's top or below and introduces additional magnetic field in order to offset the influence of the irregular change in earth's magnetic field to the magnetic field information that magnetic sensor detected. The additional magnetic field intensity of the magnet is quickly attenuated along with the increase of the distance in the surrounding environment, so that the influence of vehicles positioned outside the parking space on the magnetic field information detected by the equipment is greatly reduced, and for the vehicles in the parking space, particularly vehicle body materials positioned closest to the equipment can generate strong changes on the magnetic field information acquired by the equipment, so that the detection precision of whether the vehicle information exists on the parking space is improved.
Drawings
FIG. 1 is a sectional view showing the structure of a first embodiment of an apparatus for detecting the presence or absence of a vehicle on a parking space using a magnetic field;
FIG. 2 is a schematic view of the housing of FIG. 1;
fig. 3 is a graph showing the relationship between the magnitude of the magnetic field strength around the magnet and the distance from the magnet.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
the embodiment one of the device for detecting whether the vehicle exists on the berth by using the magnetic field comprises the following steps:
as shown in fig. 1 and 2, an apparatus for detecting whether a vehicle is present at a parking space using a magnetic field includes a magnetic sensor integrated into a circuit board 3, and the circuit board 3 further includes a communication unit, a power supply unit, and a controller unit. The magnetic sensor, the communication unit, the power supply unit and the controller unit in the circuit board jointly complete the functions of collecting environmental information such as magnetic field information, communicating with the cloud, supplying power and realizing service logic. The magnetic circuit board is characterized by further comprising a shell, wherein the shell comprises a shell body 1 and a cover body 2, the circuit board 3 is arranged on the cover body 2, and the magnet is arranged in the shell body 1. The magnet is a cylindrical magnet and is vertically installed in the installation cavity 4 at the bottom of the shell, the direction of the magnetic field of the magnet is approximately orthogonal to the earth magnetic field, the reason that the magnetic pole of the earth magnetic field is not completely overlapped with the geographic pole and has a declination is the reason that the magnetic pole is not completely orthogonal to the geographic pole, and the magnet is only required to be vertically installed to enable the magnetic field of the magnet to be approximately orthogonal to the earth magnetic field for the convenience of production and installation. The magnet is located 90mm department below the magnetic sensor, and the distance is 90mm between circuit board 3 and the installation cavity 4 up end promptly.
From the nature of the magnetic field, the magnitude of the magnetic field strength around the magnet is inversely proportional to the distance from the magnet, as shown in fig. 3, where the horizontal axis is the distance from the magnet at a point around the magnet and the vertical axis is the magnetic field strength at that point. It can be seen from the figure that the magnetic field intensity of the magnet outside the parking space range is greatly different from the magnetic field intensity inside the parking space, especially from the magnetic field intensity near the equipment, that is, the magnetic substance outside the parking space has a small influence on the magnetic field information detected by the equipment, and the magnetic substance inside the parking space has a large influence on the magnetic field information detected by the equipment. The magnetic field intensity of the additional magnet is rapidly attenuated along with the increase of the distance in the surrounding environment, so that the influence of vehicles outside the parking space on the magnetic field information detected by the equipment is greatly reduced, and for the vehicles in the parking space, particularly vehicle body materials closest to the equipment can generate strong changes on the magnetic field information acquired by the equipment. Compared with the prior art, can lead to reducing more than 10 times because of earth magnetic field changes to the influence of magnetic sensor detection effect, reduce more than 50 times to the influence that the vehicle outside the parking stall leads to, the detection precision of equipment can reach more than 99%, the condition that the equipment that has changed prior art and can't solve because of the equipment that earth magnetic field changes leads to detects the precision decline even because of the equipment that earth magnetic field changes leads to can't work has been changed, the current situation that the equipment that adopts prior art need not just need recalibrate (or become the demarcation) after a period of time, the application value of the detection technique who has no vehicle on utilizing magnetic field detection berth has greatly been promoted.
When the distance between the magnet and the magnetic sensor is tested, the detection effect is best when the distance between the magnet and the magnetic sensor is 90 mm.
The embodiment II of the device for detecting whether the vehicle exists on the berth by utilizing the magnetic field comprises the following steps:
a difference from the embodiment is that the magnet is not mounted within the housing, but rather on the dock. The detection device is required to be installed on a berth, the magnetic sensor is integrated in the circuit board and then installed in the shell together with other components such as a battery and the like, the magnet is independent from the shell, and the magnet is fixed on the berth only through the shell. The mounting mode can also achieve the effect of improving the detection precision of the magnetic sensor by utilizing the additional magnetic field generated by the magnet.
In addition, the magnet is not limited to be installed below the magnetic sensor, and the installation of the magnet above the magnetic sensor can also achieve the effect of improving the detection accuracy of the magnetic sensor by using the additional magnetic field generated by the magnet. For practical reasons, the distance between the magnet and the magnetic sensor should be between 20mm and 400 mm.
The first embodiment and the second embodiment are specific devices of a method for detecting whether a vehicle is on a berth by using a magnetic field, and the detection method is characterized in that berth magnetic field information is collected by using a magnetic sensor, and a magnet is placed above or below the magnetic sensor to introduce an additional magnetic field so as to counteract the influence of irregular change of the earth magnetic field on the magnetic field information detected by the magnetic sensor. The specific device for implementing the detection method is not limited to the two embodiments, and therefore, the specific device applying the detection method should be protected.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (6)
1. An apparatus for detecting the presence or absence of a vehicle at a parking space using a magnetic field, comprising a magnetic sensor, characterized in that: the magnetic field sensor comprises a magnetic field sensor and a shell, wherein the magnetic field sensor is arranged on the shell, and the magnet is arranged in the shell.
2. The apparatus for detecting the presence or absence of a vehicle at a berth using a magnetic field according to claim 1, characterized in that: the magnetic sensor is integrated in a circuit board, and a communication unit, a power supply unit and a controller unit are further integrated in the circuit board.
3. The apparatus for detecting the presence or absence of a vehicle at a berth using a magnetic field according to claim 1, characterized in that: the magnet is a cylindrical magnet and is vertically arranged in an installation cavity at the bottom of the shell.
4. The apparatus for detecting the presence or absence of a vehicle at a berth using a magnetic field according to claim 1, characterized in that: the distance between the magnet and the magnetic sensor is 20mm-400 mm.
5. The apparatus for detecting the presence or absence of a vehicle at a berth using a magnetic field according to claim 1, characterized in that: the magnet is arranged at a position 90mm below the magnetic sensor.
6. An apparatus for detecting the presence or absence of a vehicle at a parking space using a magnetic field, comprising a magnetic sensor, characterized in that: the magnetic sensor comprises a magnetic sensor, a magnetic sensor and a shell, wherein the magnetic sensor is arranged in the shell, and the magnet is arranged on a berth and is fixed through the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920869705.5U CN210348811U (en) | 2019-06-11 | 2019-06-11 | Device for detecting whether vehicles exist on berth by utilizing magnetic field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920869705.5U CN210348811U (en) | 2019-06-11 | 2019-06-11 | Device for detecting whether vehicles exist on berth by utilizing magnetic field |
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| CN210348811U true CN210348811U (en) | 2020-04-17 |
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| CN201920869705.5U Active CN210348811U (en) | 2019-06-11 | 2019-06-11 | Device for detecting whether vehicles exist on berth by utilizing magnetic field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211417A (en) * | 2019-06-11 | 2019-09-06 | 苏州漫思智能检测系统有限公司 | It is a kind of using whether there is or not the device and methods of vehicle on magnetic field detection berth |
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2019
- 2019-06-11 CN CN201920869705.5U patent/CN210348811U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211417A (en) * | 2019-06-11 | 2019-09-06 | 苏州漫思智能检测系统有限公司 | It is a kind of using whether there is or not the device and methods of vehicle on magnetic field detection berth |
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