CN113891298A - Vehicle Bluetooth key positioning method - Google Patents
Vehicle Bluetooth key positioning method Download PDFInfo
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- CN113891298A CN113891298A CN202111154839.7A CN202111154839A CN113891298A CN 113891298 A CN113891298 A CN 113891298A CN 202111154839 A CN202111154839 A CN 202111154839A CN 113891298 A CN113891298 A CN 113891298A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000013507 mapping Methods 0.000 claims abstract description 25
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a vehicle Bluetooth key positioning method, which mainly comprises the steps of acquiring whether the current environment of a Bluetooth key is a sheltering environment, detecting a signal value of the Bluetooth key by a vehicle-end Bluetooth slave module arranged around a vehicle and transmitting the signal value to a vehicle-end Bluetooth master module, calling a Bluetooth signal and position mapping data calibrated in the sheltering and non-sheltering environments in advance by the vehicle-end Bluetooth master module based on the detected environment information, and judging the position of the Bluetooth key according to the currently acquired Bluetooth signal intensity so as to realize Bluetooth control. Through practice and comparison with the prior art, the method can obviously improve the accuracy of judging the position of the Bluetooth key.
Description
Technical Field
The invention relates to the technical field of vehicle networking, in particular to a vehicle Bluetooth key positioning method.
Background
With the development and maturity of the internet of vehicles and bluetooth technology, the mobile phone also becomes a carrier of the automobile key. The connection mode of cell-phone and car mainly uses the bluetooth to be connected as leading, can avoid like this can't opening the door or start the vehicle in underground garage or the not good region of removal signal.
Specifically, the user carries the special APP who installs the bluetooth key function that contains that the garage provided to the cell-phone bluetooth key function of activation vehicle, alright in order to initiatively unblock, seek operations such as car through APP (cell-phone bluetooth key), and then can also start the button through door handle PE button or PS, carries out noninductive unblock or start, provides very big convenience for the user. Especially, virtual key based on BLE bluetooth need not the entity can be unblanked in order automatic identification, has greatly promoted user's experience with the car.
At present, the function of the vehicle bluetooth key is greatly affected by the shielding object, so that the phenomenon that the vehicle bluetooth key is not accurately positioned or cannot be positioned often occurs, for example, a user places a mobile phone in a pocket or a bag, and the situation that the function is invalid or the key cannot be detected is prompted in the market when the bluetooth key is used for noninductive unlocking and locking and a vehicle is started.
For this reason, there is also bluetooth key location scheme based on car networking in this field, specifically realize the location of bluetooth key through receiving the bluetooth signal, but do not consider that when the bluetooth key is in different sheltering from the environment, even if there is very big difference in its signal strength in same position, lead to the received bluetooth signal inaccurate, and then influence the location effect.
Disclosure of Invention
In view of the above, the present invention is directed to a method for positioning a bluetooth key for a vehicle, so as to solve the problem of poor positioning manner in the prior art.
The technical scheme adopted by the invention is as follows:
a bluetooth key positioning method for a vehicle comprises the following steps:
the method comprises the following steps that a Bluetooth key sends a shielding state to a pre-deployed vehicle-end Bluetooth master module, and meanwhile, a plurality of pre-deployed vehicle-end Bluetooth slave modules receive Bluetooth signals of the Bluetooth key;
the vehicle-end Bluetooth slave module sends the received Bluetooth signal to the vehicle-end Bluetooth master module;
the vehicle end Bluetooth master module calls pre-calibrated shielding mapping data or non-shielding mapping data according to the shielding state, and positions the position of the current Bluetooth key by combining Bluetooth signals sent by the vehicle end Bluetooth slave module; wherein the calibrated mapping data represents a correspondence of bluetooth signal strength to relative vehicle distance.
In at least one possible implementation manner, the calibration manner of the mapping data includes:
dividing a plurality of direction lines on the left side and the right side of the vehicle in advance by taking a preset angle as a unit;
arranging an elliptical line outside the vehicle along the shape of the vehicle, and enabling the elliptical line to be intersected with the direction lines of the left side and the right side to obtain calibration positions in different directions;
enabling the Bluetooth key to be in an unshielded environment and a shielded environment respectively, and receiving Bluetooth key signal values of different calibration positions in different environments by the vehicle-end Bluetooth slave module;
the vehicle-end Bluetooth slave module transmits the detected Bluetooth signal to the vehicle-end Bluetooth master module;
and performing positioning calculation according to the Bluetooth signal intensity of the calibration position in the non-shielding or shielding environment by a preset positioning algorithm in the vehicle-end Bluetooth main module to obtain non-shielding calibration data and shielding calibration data.
In at least one possible implementation manner, the previously dividing the left side and the right side of the vehicle into a plurality of direction lines by taking a preset angle as a unit includes dividing the left side and the right side of the vehicle into 14 direction lines by taking a 30-degree included angle as a unit from 0-180 degrees of the left side and the right side of the vehicle respectively.
In at least one possible implementation, the nominal position encompasses several different ranges of distances of the vehicle periphery from the vehicle.
In at least one possible implementation manner, the calibrating manner of the mapping data further includes:
and constructing a mapping chart and storing the mapping chart according to the position relation between the signal intensity of the Bluetooth key and the position relation of the Bluetooth key relative to the vehicle respectively according to the non-shielding calibration data and the shielding calibration data.
In at least one possible implementation manner, the sending, by the bluetooth key, the presence or absence of the blocking state to the pre-deployed vehicle-end bluetooth master module includes:
and the Bluetooth key calls a distance sensor in the terminal to which the Bluetooth key belongs, and judges whether the Bluetooth key is in a shielding state or not according to the detection result of the distance sensor.
In at least one possible implementation manner, data interaction is carried out between the vehicle-end Bluetooth master module and the vehicle-end Bluetooth slave module through a LIN channel.
In at least one possible implementation manner, the Bluetooth key is built in a user intelligent terminal in a virtual program form.
The main design concept of the invention is that whether the current environment of the Bluetooth key is a sheltered environment is obtained, meanwhile, the vehicle-end Bluetooth slave module arranged around the vehicle detects the signal value of the Bluetooth key and transmits the signal value to the vehicle-end Bluetooth master module, the vehicle-end Bluetooth master module calls the Bluetooth signal and position mapping data calibrated in the sheltered and non-sheltered environments in advance based on the detected environment information, and the currently obtained Bluetooth signal strength is used for judging the position of the Bluetooth key, thereby realizing Bluetooth vehicle control. Through practice and comparison with the prior art, the method can obviously improve the accuracy of judging the position of the Bluetooth key.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a flowchart of a bluetooth key positioning method for a vehicle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of mapping data calibration according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The invention provides an embodiment of a bluetooth key positioning method for a vehicle, specifically, as shown in fig. 1, the method includes:
step S1, the Bluetooth key sends a shielding state to the pre-deployed vehicle-end Bluetooth master module, and meanwhile, the pre-deployed vehicle-end Bluetooth slave modules receive Bluetooth signals of the Bluetooth key;
step S2, the vehicle end Bluetooth slave module sends the received Bluetooth signal to the vehicle end Bluetooth master module;
step S3, the vehicle end Bluetooth master module calls pre-calibrated shielding mapping data or non-shielding mapping data according to the shielding state, and positions the position of the current Bluetooth key by combining the Bluetooth signal sent by the vehicle end Bluetooth slave module; wherein the calibrated mapping data represents a correspondence of bluetooth signal strength to relative vehicle distance.
Further, the calibration method of the mapping data comprises:
dividing 7 direction lines from 0 degrees to 180 degrees in advance on the left side and the right side of the vehicle by taking a 30-degree included angle as a unit;
arranging an elliptical line outside the vehicle along the shape of the vehicle, and enabling the elliptical line to be intersected with the direction lines of the left side and the right side to obtain calibration positions in different directions;
enabling the Bluetooth key to be in an unshielded environment and a shielded environment respectively, and receiving Bluetooth key signal values in different environments and different positions by the vehicle-end Bluetooth slave module;
the vehicle-end Bluetooth slave module transmits the detected Bluetooth signal to the vehicle-end Bluetooth master module;
and performing positioning calculation according to the Bluetooth signal intensity of the calibration position in the non-shielding or shielding environment by a preset positioning algorithm in the vehicle-end Bluetooth main module to obtain non-shielding calibration data and shielding calibration data.
Further, the calibration method of the mapping data further includes:
and constructing a mapping chart and storing the mapping chart according to the position relation between the signal intensity of the Bluetooth key and the position relation of the Bluetooth key relative to the vehicle respectively according to the non-shielding calibration data and the shielding calibration data.
Further, the sending of the shielding state of the bluetooth key to the pre-deployed vehicle-end bluetooth master module includes:
and the Bluetooth key calls a distance sensor in the terminal to which the Bluetooth key belongs, and judges whether the Bluetooth key is in a shielding state or not according to the detection result of the distance sensor.
Further, data interaction is carried out between the vehicle-end Bluetooth master module and the vehicle-end Bluetooth slave module through an LIN channel.
In the aforementioned calibration manner, as shown in fig. 2, 7 direction lines are marked on the left side and the right side of the vehicle from 0 ° to 180 ° in advance by taking a 30 ° included angle as a unit, that is, the left side includes 7 direction lines of 0 °, 30 °, 60 °, 90 °, 120 °, 150 °, and 180 ° (the same principle on the right side is not repeated), then an elliptical line is arranged outside the vehicle along the vehicle shape, and the elliptical line intersects with the 14 direction lines on the left side and the right side to obtain calibration positions in different directions (for example, for some vehicle types and corresponding elliptical dimensions, 0.5m, 1m, 1.5m, 2m, 2.5m, 3m, 6 distance parameters from the vehicle body from far to near and corresponding calibration positions can be obtained by combining the direction lines). Then, the bluetooth key (usually, a terminal device of a user, such as a mobile phone) is respectively in an unobstructed environment (for example, the mobile phone is held in a hand) and an obstructed environment (for example, the mobile phone is placed in a backpack), and the vehicle-end bluetooth slave module receives bluetooth key signal values in different environments and different positions; and then, the vehicle-end Bluetooth slave module transmits the detected Bluetooth signal to the vehicle-end Bluetooth master module, and a positioning algorithm preset in the vehicle-end Bluetooth master module performs positioning calculation according to the Bluetooth signal intensity of different calibration positions in the non-shielding and shielding environments to form non-shielding calibration data and shielding calibration data.
In an actual use stage, a Bluetooth key (mobile phone APP) calls distance sensor data to judge whether the mobile phone is in a shielding state, and after the mobile phone is successfully communicated with a vehicle end main module through a mobile phone end Bluetooth SDK, a shielding judgment result is transmitted to the vehicle end Bluetooth main module; meanwhile, the vehicle-end Bluetooth slave module collects a signal value of a Bluetooth key and sends the signal value to the vehicle-end Bluetooth master module through lin communication; and the vehicle-end Bluetooth master module calls corresponding calibration data (shielded/unshielded) according to whether the mobile phone is shielded or not, and finally determines that the mobile phone is in the vehicle position by combining the signal strength sent by the vehicle-end Bluetooth slave module, so that the positioning of the Bluetooth key is realized.
The vehicle-end bluetooth master module and the vehicle-end bluetooth slave module mentioned above can be implemented by using existing software and hardware technologies, and the following implementation examples are provided for reference only: the method comprises the steps that a vehicle-end Bluetooth main module is arranged in the middle of a vehicle, and specifically comprises a Bluetooth chip and vehicle-end Bluetooth software (integrating the function of a vehicle-end digital key), wherein the vehicle-end Bluetooth main module mainly realizes vehicle-end and mobile phone-end Bluetooth communication, receives a signal intensity value detected by a vehicle-end Bluetooth slave module through an LIN channel, and can preset an existing Bluetooth positioning algorithm in the module; the Bluetooth slave module can be used for deploying a plurality of positions of the vehicle, such as the front, rear, left and right positions of the vehicle, and specifically comprises a Bluetooth chip and vehicle-side slave module software, and is mainly used for acquiring a Bluetooth signal value of a mobile phone side and sending the Bluetooth signal value to a vehicle-side Bluetooth master module through an LIN channel.
In summary, the main design concept of the present invention is to obtain whether the current environment of the bluetooth key is a sheltered environment, and at the same time, the vehicle-end bluetooth slave module disposed around the vehicle detects the signal value of the bluetooth key and transmits the signal value to the vehicle-end bluetooth master module, and the vehicle-end bluetooth master module invokes the bluetooth signal and the position mapping data calibrated in advance in sheltered and non-sheltered environments based on the detected environment information, and the currently obtained bluetooth signal strength, so as to determine the position of the bluetooth key, thereby implementing bluetooth vehicle control. Through practice and comparison with the prior art, the method can obviously improve the accuracy of judging the position of the Bluetooth key.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.
Claims (8)
1. A vehicle Bluetooth key positioning method is characterized by comprising the following steps:
the method comprises the following steps that a Bluetooth key sends a shielding state to a pre-deployed vehicle-end Bluetooth master module, and meanwhile, a plurality of pre-deployed vehicle-end Bluetooth slave modules receive Bluetooth signals of the Bluetooth key;
the vehicle-end Bluetooth slave module sends the received Bluetooth signal to the vehicle-end Bluetooth master module;
the vehicle end Bluetooth master module calls pre-calibrated shielding mapping data or non-shielding mapping data according to the shielding state, and positions the position of the current Bluetooth key by combining Bluetooth signals sent by the vehicle end Bluetooth slave module; wherein the calibrated mapping data represents a correspondence of bluetooth signal strength to relative vehicle distance.
2. The method for locating the bluetooth key for the vehicle according to claim 1, wherein the calibration of the mapping data includes:
dividing a plurality of direction lines on the left side and the right side of the vehicle in advance by taking a preset angle as a unit;
arranging an elliptical line outside the vehicle along the shape of the vehicle, and enabling the elliptical line to be intersected with the direction lines of the left side and the right side to obtain calibration positions in different directions;
enabling the Bluetooth key to be in an unshielded environment and a shielded environment respectively, and receiving Bluetooth key signal values of different calibration positions in different environments by the vehicle-end Bluetooth slave module;
the vehicle-end Bluetooth slave module transmits the detected Bluetooth signal to the vehicle-end Bluetooth master module;
and performing positioning calculation according to the Bluetooth signal intensity of the calibration position in the non-shielding or shielding environment by a preset positioning algorithm in the vehicle-end Bluetooth main module to obtain non-shielding calibration data and shielding calibration data.
3. The bluetooth key positioning method for vehicles according to claim 2, wherein the previously dividing a plurality of direction lines on the left and right sides of the vehicle in units of a predetermined angle comprises dividing 14 direction lines on the left and right sides of the vehicle in units of 30 ° included angles from 0 ° to 180 ° respectively.
4. The method as claimed in claim 2, wherein the calibration position covers several different distance ranges from the vehicle around the vehicle.
5. The method for locating a bluetooth key for a vehicle according to claim 2, wherein the calibrating manner of the mapping data further comprises:
and constructing a mapping chart and storing the mapping chart according to the position relation between the signal intensity of the Bluetooth key and the position relation of the Bluetooth key relative to the vehicle respectively according to the non-shielding calibration data and the shielding calibration data.
6. The method for positioning the vehicular bluetooth key according to any one of claims 1 to 5, wherein the step of sending the bluetooth key to the pre-deployed vehicular-end bluetooth master module with or without a blocking state comprises:
and the Bluetooth key calls a distance sensor in the terminal to which the Bluetooth key belongs, and judges whether the Bluetooth key is in a shielding state or not according to the detection result of the distance sensor.
7. The method for locating the vehicle Bluetooth key according to any one of claims 1 to 5, wherein data interaction is performed between the vehicle-side Bluetooth master module and the vehicle-side Bluetooth slave module through an LIN channel.
8. The method for locating the Bluetooth key for the vehicle according to any one of claims 1 to 5, wherein the Bluetooth key is embedded in an intelligent terminal of a user in a virtual program form.
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| CN202111154839.7A CN113891298B (en) | 2021-09-29 | 2021-09-29 | Bluetooth key positioning method for vehicle |
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| CN113891298B (en) | 2024-02-27 |
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