CN113271160B - Signal positioning calibration method and system for digital key system - Google Patents
Signal positioning calibration method and system for digital key system Download PDFInfo
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- CN113271160B CN113271160B CN202110497439.XA CN202110497439A CN113271160B CN 113271160 B CN113271160 B CN 113271160B CN 202110497439 A CN202110497439 A CN 202110497439A CN 113271160 B CN113271160 B CN 113271160B
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- 238000012937 correction Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims description 15
- 238000007619 statistical method Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- 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
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- 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
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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Abstract
The invention discloses a signal positioning calibration method and a signal positioning calibration system for a digital key system, wherein the calibration method comprises the following steps: acquiring antenna parameters of all unlocking terminals to be calibrated, selecting one of all unlocking terminals as a reference object, and using the rest unlocking terminals as comparison objects; calculating the standard signal intensity difference of each comparison object relative to the reference object according to the antenna parameters; obtaining a reference calibration parameter corresponding to the reference object according to the measured data; correcting the reference calibration parameters according to the intensity difference of each standard signal to obtain corrected calibration parameters respectively matched with each comparison object; in the positioning terminal, performing signal positioning calibration on a reference object by adopting a reference calibration parameter, and performing signal positioning calibration on a comparison object matched with each correction calibration parameter by adopting each correction calibration parameter respectively; by adopting the calibration method disclosed by the invention, a large amount of calibration working time can be effectively saved, and the efficiency of signal calibration work is improved.
Description
Technical Field
The invention relates to the technical field of positioning data signal calibration, in particular to a signal positioning calibration method and a signal positioning calibration system for a digital key system.
Background
With the development of technology, smart keys have been gradually converted from traditional physical keys to digital keys. The carrier of the digital key is usually a product such as a mobile phone, a bracelet, a watch and the like. The user need not to carry the entity key again, only needs activate the digital key on the cell-phone APP and can unblock, and possesses more function than the entity key, if function such as share.
The currently common digital keys are divided into the following types based on radio frequency signals: cloud key, bluetooth key, NFC key, UWB key etc.. The product form is divided into the following parts: the type is dressed to intelligence such as cell-phone, wrist-watch, bracelet, glasses, and it is the broadest to use wherein as the carrier of digital key with the cell-phone.
The mobile phone generally uses bluetooth low energy (BLE technology) as a positioning signal, and because bluetooth antenna performance parameters of various mobile phone manufacturers are different, that is, antenna gains and performances are different, special RSSI signal strength calibration work needs to be performed for mobile phones of different styles. For an automobile digital key system, calibration work of positioning signals inside and outside a vehicle needs to be performed for each type of mobile phone, and generally one mobile phone takes 1 day, and calibration of 100 mobile phones takes more than 3 months.
Disclosure of Invention
The present invention provides a signal positioning and calibrating method and system for a digital key system, which can quickly calibrate positioning signals of different unlocking terminals to solve the above technical problems.
In order to achieve the above object, the present invention discloses a signal positioning calibration method for a digital key system, wherein the digital key system comprises a positioning terminal, the positioning terminal is used for positioning the position of an unlocking terminal by detecting a wireless signal sent by the unlocking terminal, and the calibration method comprises the following steps:
acquiring antenna parameters of all the unlocking terminals to be calibrated, selecting one of all the unlocking terminals as a reference object, and using the rest unlocking terminals as comparison objects;
calculating the standard signal intensity difference of each comparison object relative to the reference object according to the antenna parameters;
obtaining a reference calibration parameter corresponding to the reference object according to the measured data;
correcting the reference calibration parameters according to the standard signal intensity difference to obtain corrected calibration parameters respectively matched with each comparison object;
in the positioning terminal, the reference calibration parameters are adopted to carry out signal positioning calibration on the reference object, and each corrected calibration parameter is respectively adopted to carry out signal positioning calibration on the matched comparison object
Preferably, the method for obtaining the reference calibration parameter includes:
opening the reference object, respectively placing the reference object at a plurality of different test points, and respectively recording measurement data according to the feedback of the positioning terminal;
and obtaining the reference calibration parameter through statistical analysis of the measurement data.
Preferably, the positioning terminal and the unlocking terminal are in communication connection through any one of a low-power-consumption Bluetooth signal, a uwb signal and a WIFI signal.
The invention also discloses a signal positioning and calibrating system for the digital key system, wherein the digital key system comprises a positioning terminal, the positioning terminal is used for positioning the position of the unlocking terminal by detecting a wireless signal sent by the unlocking terminal, and the calibrating system comprises an antenna parameter acquisition module, a standard signal difference calculating module, a reference data calculating module, a correction data calculating module and a calibrating module;
the antenna parameter acquisition module is used for acquiring antenna parameters of all the unlocking terminals to be calibrated;
the reference data calculation module is used for obtaining reference calibration parameters corresponding to a reference object according to the measured data, wherein the reference object is any one of the unlocking terminals to be calibrated, and the rest other unlocking terminals to be calibrated are comparison objects;
the standard signal difference calculating module is configured to calculate a standard signal strength difference of each comparison object with respect to the reference object according to the antenna parameter;
the correction data calculation module is used for correcting the reference calibration parameters according to each standard signal intensity difference to obtain correction calibration parameters respectively matched with each comparison object;
the calibration module is used for performing signal positioning calibration on the reference object by adopting the reference calibration parameters in the positioning terminal and performing signal positioning calibration on the matched comparison object by respectively adopting each corrected calibration parameter.
Preferably, the correction data calculation module comprises a data recording module and a statistical analysis module;
the data recording module is used for recording the measurement data of the reference object at a plurality of different test points according to the feedback of the positioning terminal;
and the statistical analysis module is used for performing statistical analysis on the measurement data to obtain the reference calibration parameter.
Preferably, the positioning terminal and the unlocking terminal are in communication connection through any one of a low-power-consumption Bluetooth signal, a uwb signal and a WIFI signal.
The invention also discloses another signal positioning calibration system for a digital key system, which is characterized by comprising one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the programs comprise instructions for executing the signal positioning calibration method for the digital key system.
The invention also discloses a computer readable storage medium which comprises a computer program for testing, wherein the computer program can be executed by a processor to complete the signal positioning and calibrating method for the digital key system.
When the signal positioning and calibrating method and the signal positioning and calibrating system for the digital key system are adopted to calibrate the positioning signals of the unlocking terminals, only one of the unlocking terminals (the reference object) needs to be actually measured and calibrated, and then the corrected and calibrated parameters for calibrating other comparison objects are calculated according to the difference of the antenna parameters of the reference object and other comparison objects, so that the remaining other unlocking terminals do not need to be actually measured and calibrated, and only the corrected and calibrated parameters are adopted to carry out data correction on the reference and calibrated parameters of the reference object, thereby effectively saving a large amount of actually measured and calibrated working time and improving the efficiency of a large amount of signal calibration work caused by the antenna difference of different unlocking terminals.
Drawings
Fig. 1 is a schematic flow chart of a calibration method in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a calibration system in an embodiment of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The present embodiment discloses a signal positioning and calibrating method for a digital key system, and the digital key system in the present embodiment is used for a vehicle, but not limited thereto, such as a door. For any type of vehicle with the digital key system, the digital key system comprises a positioning terminal installed on a vehicle body, and the positioning terminal is used for positioning the position of an unlocking terminal by detecting a wireless signal sent by the unlocking terminal (such as a mobile phone). As a user may use any existing mobile phone as an unlocking terminal, and different models of mobile phones have different antenna gains, signal calibration needs to be performed for the mobile phones of different models and styles, so as to effectively save the workload of the signal calibration, as shown in fig. 1, the calibration method in this embodiment includes the following steps:
s1: acquiring antenna parameters of all unlocking terminals to be calibrated, selecting one of all unlocking terminals as a reference object, and using the rest of the unlocking terminals as comparison objects;
s2: calculating the standard signal intensity difference of each comparison object relative to the reference object according to the antenna parameters;
s3: obtaining a reference calibration parameter corresponding to the reference object according to the measured data;
s4: correcting the reference calibration parameters according to the standard signal intensity difference to obtain corrected calibration parameters respectively matched with each comparison object;
s5: in the positioning terminal, the reference calibration parameters are adopted to carry out signal positioning calibration on the reference object, and each corrected calibration parameter is respectively adopted to carry out signal positioning calibration on the matched comparison object.
Further, the method for obtaining the reference calibration parameter includes:
firstly, opening a reference object, respectively placing the reference object at a plurality of different test points, and respectively recording measurement data according to the feedback of a positioning terminal; then, the reference calibration parameters are obtained through statistical analysis of the measured data.
Specifically, for the vehicle digital key system, when the signal calibration is performed on five mobile phones (a, B, C, D, and E, respectively) by using the calibration method, first, antenna parameters of the five mobile phones are obtained according to experimental data, and the mobile phone a is selected as a reference object, and the mobile phones B, C, D, and E are selected as comparison objects. Then, according to the respective antenna parameters of the five mobile phones, the standard signal intensity differences of the antennas of the mobile phones B, C, D and E and the mobile phone A are calculated, wherein the standard signal intensity differences are X respectively b 、X c 、X d 、X e . Then, the mobile phone A and a positioning terminal (such as a Bluetooth module) on the vehicle are opened, the mobile phone A is respectively placed at different positions of the vehicle body, the feedback of the positioning terminal is checked, the measurement data reflecting the connection effect at the position is recorded according to the feedback of the positioning terminal, and then the reference calibration parameters of the mobile phone A are calculated through comprehensive statistical analysis of a plurality of groups of measurement data. Then, according to X b 、X c 、X d 、X e Respectively correcting the reference calibration parameters to obtain corrected calibration parameters Y corresponding to the mobile phones B, C, D and E respectively b 、Y c 、Y d 、Y e . For example, depending on the antenna parameters, handset A is 2dB stronger than the antenna signal of handset B, X b Is 2dB, after obtaining the reference calibration parameter, the correction calibration parameter Y corresponding to the mobile phone B can be obtained by subtracting 2dB from the reference calibration parameter b . Finally, in the positioning terminal of the vehicle, the mobile phone A is calibrated by adopting the reference calibration parameters, and Y is respectively adopted b 、Y c 、Y d 、Y e And calibrating the mobile phones B, C, D and E. Therefore, when the five mobile phones are subjected to signal positioning calibration, only one mobile phone (mobile phone A) needs to be subjected to actual measurement calibration, and the other remaining four mobile phones (mobile phones B, C, D and E) can calculate calibration parameters only through antenna parameters, so that a large amount of actual measurement calibration working time can be effectively saved, and the efficiency of a large amount of signal calibration work caused by different unlocking terminal antenna differences is improved.
Further, in the above embodiment, the positioning terminal and the unlocking terminal may be in communication connection through any one of a bluetooth low energy signal (bluetooth BLE), a uwb signal (uwb: ultra wide band communication positioning technology), and a WIFI signal.
Referring to fig. 2, in another embodiment of the present invention, a signal positioning calibration system for a digital key system is further disclosed, where the digital key system includes a positioning terminal, the positioning terminal is configured to position a position of an unlocking terminal by detecting a wireless signal sent by the unlocking terminal, and the calibration system includes an antenna parameter obtaining module, a standard signal difference calculating module, a reference data calculating module, a correction data calculating module, and a calibration module.
And the antenna parameter acquisition module is used for acquiring the antenna parameters of all the unlocking terminals to be calibrated.
And the reference data calculation module is used for obtaining reference calibration parameters corresponding to a reference object according to the measured data, the reference object is any one of all the unlocking terminals to be calibrated, and the rest other unlocking terminals to be calibrated are comparison objects.
And the standard signal difference calculating module is used for calculating the standard signal intensity difference of each comparison object relative to the reference object according to the antenna parameters.
And the correction data calculation module is used for correcting the reference calibration parameters according to each standard signal intensity difference to obtain correction calibration parameters respectively matched with each comparison object.
And the calibration module is used for performing signal positioning calibration on the reference object by adopting the reference calibration parameters and performing signal positioning calibration on the comparison object matched with the reference object by respectively adopting each correction calibration parameter in the positioning terminal.
Furthermore, the correction data calculation module comprises a data recording module and a statistical analysis module.
And the data recording module is used for recording the measurement data of the reference object at a plurality of different test points according to the feedback of the positioning terminal.
And the statistical analysis module is used for performing statistical analysis on the measurement data to obtain a reference calibration parameter.
The working principle and working process of the calibration system in this embodiment are detailed in the signal positioning and calibration method for the digital key system disclosed in the above embodiment, and are not described herein again.
The invention also discloses a signal location calibration system for a digital key system, comprising one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the signal location calibration method for a digital key system as described above.
In addition, the invention also discloses a computer readable storage medium which comprises a computer program for testing, wherein the computer program can be executed by a processor to complete the signal positioning calibration method for the digital key system.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (6)
1. A signal positioning calibration method for a digital key system, the digital key system including a positioning terminal, the positioning terminal being configured to position a position of an unlocking terminal by detecting a wireless signal sent by the unlocking terminal, the calibration method comprising the steps of:
acquiring antenna parameters of all the unlocking terminals to be calibrated, selecting one of all the unlocking terminals as a reference object, and using the rest unlocking terminals as comparison objects;
calculating the standard signal strength difference of each comparison object relative to the reference object according to the antenna parameters;
obtaining a reference calibration parameter corresponding to the reference object according to the measured data;
correcting the reference calibration parameters according to the standard signal intensity difference to obtain corrected calibration parameters respectively matched with each comparison object;
in the positioning terminal, the reference calibration parameters are adopted to carry out signal positioning calibration on the reference object, and each corrected calibration parameter is respectively adopted to carry out signal positioning calibration on a comparison object matched with the corrected calibration parameter; the method for obtaining the reference calibration parameters comprises the following steps:
opening the reference object, respectively placing the reference object at a plurality of different test points, and respectively recording measurement data according to the feedback of the positioning terminal;
and obtaining the reference calibration parameter through statistical analysis of the measurement data.
2. The signal positioning and calibrating method for the digital key system as claimed in claim 1, wherein the positioning terminal and the unlocking terminal are in communication connection through any one of a bluetooth low energy signal, a uwb signal and a WIFI signal.
3. A signal positioning calibration system for a digital key system, the digital key system comprises a positioning terminal, the positioning terminal is used for positioning the position of an unlocking terminal by detecting a wireless signal sent by the unlocking terminal, and the signal positioning calibration system is characterized by comprising an antenna parameter acquisition module, a standard signal difference calculation module, a reference data calculation module, a correction data calculation module and a calibration module;
the antenna parameter acquisition module is used for acquiring all antenna parameters of the unlocking terminal to be calibrated;
the reference data calculation module is used for obtaining reference calibration parameters corresponding to a reference object according to the measured data, wherein the reference object is any one of all the unlocking terminals to be calibrated, and the rest other unlocking terminals to be calibrated are comparison objects;
the standard signal difference calculating module is configured to calculate a standard signal strength difference of each comparison object with respect to the reference object according to the antenna parameter;
the correction data calculation module is used for correcting the reference calibration parameters according to each standard signal intensity difference to obtain correction calibration parameters respectively matched with each comparison object;
the calibration module is used for performing signal positioning calibration on the reference object by adopting the reference calibration parameters in the positioning terminal and performing signal positioning calibration on the matched comparison object by respectively adopting each corrected calibration parameter; the correction data calculation module comprises a data recording module and a statistical analysis module;
the data recording module is used for recording the measurement data of the reference object at a plurality of different test points according to the feedback of the positioning terminal;
and the statistical analysis module is used for performing statistical analysis on the measurement data to obtain the reference calibration parameter.
4. The signal positioning and calibration system for the digital key system as claimed in claim 3, wherein the positioning terminal and the unlocking terminal are in communication connection through any one of a Bluetooth low energy signal, a uwb signal and a WIFI signal.
5. A signal location calibration system for a digital key system, comprising:
one or more processors;
a memory;
and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the signal location calibration method for a digital key system of any of claims 1 to 2.
6. A computer-readable storage medium comprising a test computer program executable by a processor to perform the method of signal location calibration for a digital key system of any of claims 1 to 2.
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| CN114701451B (en) * | 2022-04-09 | 2023-03-28 | 上海银基信息安全技术股份有限公司 | RSSI value calibration method and device, intelligent equipment and storage medium |
| CN115002270B (en) * | 2022-04-21 | 2025-01-03 | 联合汽车电子有限公司 | Digital key device self-calibration method and digital key device |
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| US8023965B2 (en) * | 2008-05-09 | 2011-09-20 | Mitel Networks Corporation | Method, system and apparatus for locating a mobile communications device |
| CN102695269B (en) * | 2011-03-21 | 2015-08-19 | 华为技术有限公司 | A kind of positioning correction method, relevant apparatus and system |
| CN107422316A (en) * | 2017-04-10 | 2017-12-01 | 东南大学 | A kind of wireless object localization method based on multifrequency point signal intensity |
| CN110868752B (en) * | 2018-08-28 | 2022-01-11 | 阿里巴巴集团控股有限公司 | Terminal positioning method and device |
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