CN106204808B - Incude key correction system and bearing calibration - Google Patents
Incude key correction system and bearing calibration Download PDFInfo
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- CN106204808B CN106204808B CN201510215123.1A CN201510215123A CN106204808B CN 106204808 B CN106204808 B CN 106204808B CN 201510215123 A CN201510215123 A CN 201510215123A CN 106204808 B CN106204808 B CN 106204808B
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Abstract
A kind of induction key correction system, including signal source and arithmetic unit, the signal source is for generating and emitting low frequency signal and magnetic field to the induction key；The induction key can sense the low frequency signal that the signal source is sent out and the Magnetic Field sensed is sent to arithmetic unit；The arithmetic unit is used to obtain field strength values from the Magnetic Field and it is made operation to obtain the Error Compensation Algorithm needed for correction induction key sensitivity with magnetic field intensity standard value, while Error Compensation Algorithm is sent to the induction key.When induction key is received again by low frequency signal and magnetic field, its magnetic field intensity sensed is corrected according to Error Compensation Algorithm.The present invention also provides a kind of induction key bearing calibrations.Accuracy and stability of the induction key to induction of signal can be improved using the present invention.
Description
Technical field
The present invention relates to a kind of induction key correction system and bearing calibrations.
Background technology
Based on the raising that people require automotive safety protection aspect, PKE (Passive Keyless Entry, passive nothing
Spoon enters) technology comes into being.In existing PEK systems, driver needs the functions such as be remotely controlled out, lock door by button,
Using novel PKE systems, driver need not carry out any operation, need to only carry an induction key.
When driver enters specified range, PEK induction keys can sense the low frequency signal that automobile is sent out, and by low frequency
Signal after authentication processing by UHF high-frequency signal transmitters send back to automobile to realize out, the functions such as lock door.In order to protect
The battery life of card PKE induction keys is unlikely to consume excessively in a short time, only receives strong with enough magnetic field
It can be just waken up when the low frequency low frequency signal of degree.Therefore, induction stability and accuracy of the induction key to low frequency signal magnetic field
It is particularly important, however, due to being influenced by hardware design framework, the magnetic field induction of PKE induction keys often will appear deviation,
Cause the low frequency signal induction sent out to automobile unstable, maloperation occurs.
Invention content
In view of the foregoing, it is necessary to a kind of induction key correction system and bearing calibration are provided, to improve induction key
To the accuracy and stability of induction of signal.
A kind of induction key correction system, is applied on induction key, signal source and arithmetic unit；The induction key
Including the first storage unit, low frequency reception unit, high-frequency emission unit and processing unit；The signal source includes that the second storage is single
Member and low frequencies unit；The arithmetic unit includes third storage unit, transmission unit and arithmetic element, the third storage
Unit the first standard Magnetic Field intensity of default storage and the second standard Magnetic Field intensity；The induction key corrects system：
Low frequencies control module sends the first low frequency signal and second low successively for controlling the low frequencies unit
Frequency signal, first low frequency signal include the first standard Magnetic Field intensity value, and second low frequency signal includes described the
Two standard Magnetic Field intensity values；The first standard Magnetic Field intensity value is differed with the second standard Magnetic Field intensity value；The sense
It answers key to receive first low frequency signal and second low frequency signal successively, and identifies first low frequency letter received
Number magnetic field intensity be first to receive field strength values, and the magnetic field intensity of second low frequency signal that receives of identification is the
Two receive field strength values；
High-frequency emission control module sends the first high-frequency signal and second high successively for controlling the high-frequency emission unit
Frequency signal, first high-frequency signal and second high-frequency signal separately include described first and receive field strength values and described
Second receives field strength values；
Analytic operation module is successively read the first standard Magnetic Field intensity value and described for controlling the arithmetic element
First receives field strength values and the second standard Magnetic Field intensity value and the second reception field strength values；And it calculates
Compensate the reception field strength values that the low frequency reception unit is received and the standard Magnetic Field that the low frequencies unit is emitted
The required Error Compensation Algorithm of error between intensity value；And
Correction module sends the Error Compensation Algorithm, to permit for controlling the transmission unit to the induction key
Perhaps the described induction key is when receiving next low frequency signal with the Error Compensation Algorithm to received reception magnetic field
Intensity value compensates operation；
Wherein, the low frequencies control module is additionally operable to judging that the error do not fall within a preset error range
When, it controls the low frequencies unit and continues to send another low frequency signal, system is corrected again to described to allow to incude key
Induction key is corrected, until the error falls into the preset error range；
The analytic operation module receives field strength values, institute according to the first standard Magnetic Field intensity value, described first
State the second standard Magnetic Field intensity value and it is described second receive field strength values, establish the first standard Magnetic Field intensity value with it is described
First function relationship between second standard Magnetic Field intensity value, and establish the first reception field strength values and connect with described second
The second function relationship between field strength values is received, and is established between the first function relationship and the second function relationship
Mapped function relation, the mapped function relation are the Error Compensation Algorithm.
A kind of induction key bearing calibration is applied on induction key, signal source and arithmetic unit；The induction key
Including the first storage unit, low frequency reception unit, high-frequency emission unit and processing unit；The signal source includes that the second storage is single
Member and low frequencies unit；The arithmetic unit includes third storage unit, transmission unit and arithmetic element, the third storage
The first standard Magnetic Field intensity of the default storage of unit, the second standard Magnetic Field intensity and third standard Magnetic Field intensity；The induction key
Bearing calibration includes step：
It controls the low frequencies unit and sends the first low frequency signal, first low frequency signal includes first standard
Field strength values；The induction key receives first low frequency signal, and identifies first low frequency signal received
Magnetic field intensity is the first reception field strength values；
It controls the high-frequency emission unit and sends the first high-frequency signal, first high-frequency signal includes first reception
Field strength values；
It controls the transmission unit and receives first high-frequency signal；
It controls the arithmetic element and reads the first standard Magnetic Field intensity value and the first reception field strength values, and
Calculate the first difference between the first standard Magnetic Field intensity value and the first reception field strength values；
If judging, if first difference does not fall within a preset error range, controls the low frequencies unit and sends
Second low frequency signal, second low frequency signal include the second standard Magnetic Field intensity value；The second standard Magnetic Field intensity
Value is differed with the first standard Magnetic Field intensity value；The induction key receives second low frequency signal and identifies and receives
Second low frequency signal magnetic field intensity be second receive field strength values；
It controls the high-frequency emission unit and sends the second high-frequency signal, second high-frequency signal includes second reception
Field strength values；
It controls the transmission unit and receives second high-frequency signal；
It controls the arithmetic element and reads the second standard Magnetic Field intensity value and the second reception field strength values, and
It calculates and compensates the reception field strength values that the low frequency reception unit is received and the mark that the low frequencies unit is emitted
The required Error Compensation Algorithm of error between quasi- field strength values；
It controls the transmission unit and sends the Error Compensation Algorithm to the induction key；
It controls the low frequencies unit and sends third low frequency signal, the third low frequency signal includes the third standard
Field strength values；The induction key receives the third low frequency signal and identifies the magnetic of the third low frequency signal received
Field intensity is that third receives field strength values；
The processing unit is controlled to recalculate third reception field strength values with the Error Compensation Algorithm
Afterwards, an approximate test field strength values are obtained；
The high-frequency emission unit transmitting third high-frequency signal is controlled, the third high-frequency signal includes the approximate test
Field strength values；
It controls the arithmetic element and reads the third standard Magnetic Field intensity value and the approximate test field strength values, and
Calculate the second difference between the third standard Magnetic Field intensity value and the approximate test field strength values；
If judging, if second difference does not fall within the preset error range, continues above-mentioned aligning step, until
First difference or second difference fall into the preset error range；
Wherein, in the step of calculating the Error Compensation Algorithm, the arithmetic element is controlled according to first standard
It is strong that field strength values, the first reception field strength values, the second standard Magnetic Field intensity value and described second receive magnetic field
Angle value establishes the first function relationship between the first standard Magnetic Field intensity value and the second standard Magnetic Field intensity value, and
The second function relationship between the first reception field strength values and the second reception field strength values is established, and establishes institute
The mapped function relation between first function relationship and the second function relationship is stated, the mapped function relation is the error
Backoff algorithm.
The induction key correction system and bearing calibration of the present invention emits low frequency signal twice and same using signal source successively
When get the magnetic field of respective strengths, induction key by the Magnetic Field received twice be sent to arithmetic unit with magnetic field intensity
Standard value compares operation and obtains mapped function relation for correction, when signal source gets magnetic field again, the correction system
Induction key is allowed to obtain the magnetic field intensity after correction according to the mapped function relation, to improve induction key to induction of signal
Accuracy and stability.
Description of the drawings
Fig. 1 is the functional block diagram that key correction system is incuded in an embodiment of the present invention.
Fig. 2 is that vehicle incudes the functional block diagram that key corrects the running environment of system in an embodiment of the present invention.
Fig. 3-4 is the flow chart that key bearing calibration is incuded in an embodiment of the present invention.
Main element symbol description
Following specific implementation mode will be further illustrated the present invention in conjunction with above-mentioned attached drawing.
Specific implementation mode
Below in conjunction with the accompanying drawings and embodiment makees further specifically induction key provided by the invention correction system 100
It is bright.
Please also refer to Fig. 1 and Fig. 2, Fig. 1 is a kind of functional block diagram of induction key correction system S1, induction key school
Positive system S1 is run in signal source 10 shown in Fig. 2, arithmetic unit 20 and induction key 300.Incuding key 300 has storage
It deposits and calculation function, induction key correction system S1 is used to correct the external signal that induction key 300 is received, is incuded with improving
Stability and accuracy of the key 300 to magnetic field induction.
Specifically, induction key 300 can receive the external signal that signal source 10 is emitted and identify the external letter
Number intensity, the external signal is during sending and receiving, signal strength and induction that the signal source 10 is emitted
There may be certain error values, the induction key correction system S to control operation between signal strength received by key 300
Device 20 detects and calculates the error amount, and is compensated to the signal strength received by induction key 300, makes the sense
Answer key 300 that can accurately incude the intensity for the signal that the signal source 10 is emitted.
Induction key correction system S1 includes low frequencies control module 102, high-frequency emission control module 104, analysis fortune
Calculate module 106 and correction module 108.
Low frequencies control module 102 emits a low frequency signal for controlling signal source 10 to induction key 300, described low
Frequency signal includes magnetic field intensity value information.High-frequency emission control module 104 answers key 300 to be sent out to arithmetic unit 20 for Perceived control
A high-frequency signal is penetrated, the high-frequency signal includes the field strength values for the low frequency signal that the induction key 300 is received
Information.Analytic operation module 106 is used to calculate the low frequency signal magnetic field intensity that signal Analysis source 10 is emitted and induction key 300
Error amount between received low frequency signal magnetic field intensity.The correction module 108 is used to disappear to the induction transmission of key 300
Except the required magnetic field intensity Error Compensation Algorithm of the error amount or magnetic field intensity error compensation value.
In the present embodiment, induction key 300 takes place frequently including the first storage unit 302, low frequency reception unit 304, height
Penetrate unit 306 and processing unit 308.
Processing unit 308 is used to provide calculation function for induction key 300.First storage unit 302 is used for as induction key
Spoon 300 provides store function, and for storing high-frequency emission control module 104.Low frequency reception unit 304 is for sensing induction key
Low frequency signal and start feeling around spoon 300 answer key 300 to receive the low frequency signal, include that magnetic field is strong in the low frequency signal
Angle value.High-frequency emission unit 306 is used to emit a high-frequency signal to arithmetic unit 20, includes low frequency reception in the high-frequency signal
The field strength values for the low frequency signal that unit 304 is received.
Signal source 10 includes the second storage unit 11, low frequencies unit 13 and the last of the twelve Earthly Branches being connected with low frequencies unit 13
Mu Huozi coils 15.
Second storage unit 11 is used to provide store function for signal source 10, and for storing low frequencies control module
102.Low frequencies unit 13 generates low frequency signal for compartment of terrain and exports relevant voltage to the Helmholtz coil 15.
Helmholtz coil 15 gets uniform standard Magnetic Field after being connect with low frequencies unit 13 so that low frequencies unit 13 is to week
While sending out a low frequency signal to allow the low frequency reception unit 304 for incuding key 300 to receive.The low frequency signal includes the mark
The standard Magnetic Field intensity in quasi- magnetic field.In the present embodiment, the axis center of Helmholtz coil 15 is nearby for placing induction key
Spoon 300, the low frequency signal and magnetic field signal can be sensed by induction key 300 and answer key 300 with start feeling, so that induction
The low frequency reception unit 304 of key 300 receives the low frequency signal, to allow high-frequency emission unit 306 to emit the high frequency
Signal, the field strength values of the low frequency signal received comprising low frequency reception unit 304 in the high-frequency signal.
Arithmetic unit 20 includes third storage unit 201, transmission unit 202 and arithmetic element 204.Arithmetic unit 20 can be with
For electronic devices such as computer, mobile phones, or the operation program being integrated in induction key 300.
Third storage unit 201 is used to provide store function for arithmetic unit 20, and for storing analytic operation module 106
And correction module 108.In present embodiment, before induction key 300 is corrected, third storage unit 201 prestores letter
The magnetic field intensity standard value in the magnetic field that number source 10 generates.Transmission unit 202 and the high-frequency emission unit 306 of induction key 300 are built
Vertical wireless communication is used to receive the high-frequency signal that induction key 300 is sent, while the institute for being calculated arithmetic unit 20
It states Error Compensation Algorithm or error compensation value is sent in induction key 300.In the present embodiment, transmission unit 202 is UHF high
Frequency signal emitting/receiving.The high-frequency signal that arithmetic element 204 is used to emit from the high-frequency emission unit 306 of induction key 300
The middle field strength values for obtaining the low frequency signal that low frequency reception unit 304 is received, and the field strength values third is stored
The magnetic field intensity standard value to prestore in unit 201 is compared operation and eliminates the field strength values and magnetic field intensity mark to obtain
The Error Compensation Algorithm needed for error between quasi- value.
Referring to Fig. 1, the modules of induction key correction system S1 be stored in the first storage unit 302 or/
And second in storage unit 11 and/or third storage unit 201 and can be by the first storage unit 302 and/or the second storage unit
11 and/or third storage unit 201 execute programmable module.In the present embodiment, low frequencies control module 102
It is stored in the second storage unit 11 and can be executed by low frequencies unit 13；High-frequency emission control module 104 and correction module
108 are stored in the first storage unit 302, and can be executed by high-frequency emission unit 306；Analytic operation module 106 is stored in
In three storage units 201, and it can be executed by arithmetic element 204.
The program of above-mentioned each module executes specific as follows：
The low frequencies unit 13 that low frequencies control module 102 controls signal source 10 emits the first low frequency signal, simultaneously
The Helmholtz coil 15 being connect with low frequencies unit 13 gets magnetic field, and it includes the first transmitting magnetic to make first low frequency signal
Field intensity value, the first transmitting field strength values are the first standard Magnetic Field intensity value.
The low frequency reception unit 304 of induction key 300 receives first low frequency signal, and identifies that it is received first low
The field strength values of frequency signal.The field strength values for first low frequency signal that note low frequency reception unit 304 receives are the
One receives field strength values.
104 Perceived control of high-frequency emission control module answers the high-frequency emission unit 306 of key 300 to send one to arithmetic unit 20
First high-frequency signal, first high-frequency signal include the first reception field strength values.
The first standard Magnetic Field intensity value is prestored in the third storage unit 201 of arithmetic unit 20.Arithmetic unit 20
Transmission unit 202 receive first high-frequency signal, and obtain from first high-frequency signal described first and receive magnetic field
Intensity value.Analytic operation module 106 controls arithmetic element 204 and reads the first standard Magnetic Field intensity value and first reception
Field strength values, and calculate the difference between the first reception field strength values and the first standard Magnetic Field intensity value.If
Judge that the difference is zero or falls into the error range of permission that the induction sensitivity for then incuding key 300 meets the requirements, and is not required to
Correction, then flow terminates.If the difference is not fallen in the range of error permission, need that induction key 300 is continued to correct.
The low frequencies unit 13 that low frequencies control module 102 controls signal source 10 again emits one second low frequency letter
Number, while the Helmholtz coil 15 being connect with low frequencies unit 13 gets magnetic field, and it includes the to make second low frequency signal
Two transmitting field strength values, the second transmitting field strength values are the second standard Magnetic Field intensity value, second standard Magnetic Field
Intensity value is different from the first standard Magnetic Field intensity value.
The low frequency reception unit 304 of induction key 300 receives second low frequency signal, and identifies that it is received second low
The field strength values of frequency signal.The field strength values for second low frequency signal that note low frequency reception unit 304 receives are the
Two receive field strength values.
104 Perceived control of high-frequency emission control module answers the high-frequency emission unit 306 of key 300 to send one to arithmetic unit 20
Second high-frequency signal, second high-frequency signal include the second reception field strength values.
The second standard Magnetic Field intensity value is prestored in the third storage unit 201 of arithmetic unit 20.Arithmetic unit 20
Transmission unit 202 receive second high-frequency signal, and obtain from second high-frequency signal described second and receive magnetic field
Intensity value.Analytic operation module 106 controls arithmetic element 204 and reads the second standard Magnetic Field intensity value and second reception
Field strength values, and calculate the difference between the second reception field strength values and the second standard Magnetic Field intensity value.
Analytic operation module 106 controls arithmetic element 204 and establishes a first function relationship and a second function relationship, described
Linear function of the first function relationship between the first standard Magnetic Field intensity value and the second standard Magnetic Field intensity value closes
System；The second function relationship is linear between the first reception field strength values and the second reception field strength values
Functional relation.
Arithmetic element 204 continues to calculate, and establishes reflecting between the first function relationship and the second function relationship
Penetrate functional relation.When the mapped function relation is applied in the second function relationship, described first is enabled to receive magnetic
Field intensity value and the second reception field strength values are after conversion, respectively ad infinitum close to the first standard Magnetic Field intensity
Value and the second standard Magnetic Field intensity value.In other words, the first reception field strength values are applying mechanically the mapping function pass
After system, one first approximate test field strength values can be obtained, the first approximate test field strength values are compared to described
One receives the more close first standard Magnetic Field intensity value of field strength values；Described second receives field strength values applying mechanically
After stating mapped function relation, one second approximate test field strength values, the second approximate test field strength values can be obtained
The more close second standard Magnetic Field intensity value of field strength values is received compared to described second.It is appreciated that described first
Approximate test field strength values and the second approximate test field strength values can be respectively ad infinitum close to first standards
Field strength values and the second standard Magnetic Field intensity value.In the present embodiment, the mapped function relation is by described first
Functional relation is determined relative to the offset and slope differences of the second function relationship.
The mapped function relation is transmitted and is stored to induction key 300 by 108 controlling transmission unit 202 of correction module
In first storage unit 302.
The low frequencies unit 13 that low frequencies control module 102 controls signal source 10 again emits third low frequency letter
Number, while the Helmholtz coil 15 being connect with low frequencies unit 13 gets magnetic field, and it includes the to make the third low frequency signal
Three transmitting field strength values, the third transmitting field strength values are third standard Magnetic Field intensity value.
The low frequency reception unit 304 of induction key 300 receives the third low frequency signal, and identifies that the third that it is received is low
The field strength values of frequency signal.The field strength values for the third low frequency signal that note low frequency reception unit 304 receives are the
Three receive field strength values.
The third is received field strength values using the mapped function relation by the processing unit 308 for incuding key 300
After recalculating, a third approximate test field strength values are obtained.High-frequency emission unit 306 sends a third to arithmetic unit 20
High-frequency signal, the third high-frequency signal include the third approximate test field strength values.
The third standard Magnetic Field intensity value is prestored in the third storage unit 201 of arithmetic unit 20.Arithmetic unit 20
Transmission unit 202 receive the third high-frequency signal, and the third approximate test is obtained from the third high-frequency signal
Field strength values.Analytic operation module 106 controls arithmetic element 204 and reads the third standard Magnetic Field intensity value and the third
Approximate test field strength values, and calculate the third approximate test field strength values and the third standard Magnetic Field intensity value it
Between difference.If the difference is within the scope of error allows, above-mentioned correcting process terminates, if the difference is not fallen within
The range that error allows, then repeat above-mentioned induction key correcting process.
The induction key correction system S1 of embodiment of the present invention can be applied in the production of induction key 300, pass through
The signal that the mapped function relation receives induction key 300 carries out magnetic field intensity compensation, improves the spirit of induction key 300
Sensitivity.It is appreciated that induction key correction system S1 can also be applied in the quality testing or maintenance of induction key 300.
Even, induction key correction system S1 can be applied in a vehicle control system.Specifically, signal source 10
It can be arranged on a vehicle, arithmetic unit 20 can be integrated in induction key 300, can be arranged on the vehicle,
It can be integrated in signal source 10.When user has found that the sensitivity of induction key 300 declines, key can be answered to correct with start feeling
System S1 obtains a new mapped function relation using above-mentioned correcting process, is re-calibrated to induction key 300, to improve it
Induction sensitivity.After induction key 300 is corrected, the magnetic field intensity of the low frequency signal received first to it compensates meter
It calculates, next step operation is executed further according to the magnetic field intensity after compensation.For example, if the magnetic field intensity after compensation falls into a default model
It encloses, induction key 300 can control being turned on and off for the Vehicular door.Therefore, using induction key correction system S1's
The sensitivity for incuding key 300 is higher, can prevent to lead to maloperation because of the magnetic field intensity error of reception.
Fig. 3 and Fig. 4 is please referred to, Fig. 3 and Fig. 4 show the flow that key bearing calibration is incuded in an embodiment of the present invention
Figure.The bearing calibration of the induction key, includes the following steps：
Step S101：Signal source 10 emits the first low frequency signal, and first low frequency signal includes that the first standard Magnetic Field is strong
Angle value；Induction key 300 receives first low frequency signal.Specifically, low frequencies control module 102 controls signal source 10
Low frequencies unit 13 emits first low frequency signal, and first low frequency signal includes the first standard Magnetic Field intensity value；Sense
It answers the low frequency reception unit 304 of key 300 to receive first low frequency signal, and identifies the magnetic for the first low frequency signal that it is received
Field intensity value.The field strength values for first low frequency signal that note low frequency reception unit 304 receives are the first reception magnetic field
Intensity value.
Step S103：Incude key 300 and emit the first high-frequency signal to arithmetic unit 20, first high-frequency signal includes
Described first receives field strength values；Arithmetic unit 20 receives first high-frequency signal.Specifically, high-frequency emission control module
104 Perceived controls answer the high-frequency emission unit 306 of key 300 to send first high-frequency signal to arithmetic unit 20, and described first
High-frequency signal includes the first reception field strength values.The transmission unit 202 of arithmetic unit 20 receives the first high frequency letter
Number, and obtain described first from first high-frequency signal and receive field strength values.
Step S105：The first standard Magnetic Field intensity value is prestored in the third storage unit 201 of arithmetic unit 20.Fortune
Calculation device 20 calculates the difference between the first reception field strength values and the first standard Magnetic Field intensity value.Specifically,
The control of analytic operation module 106 arithmetic element 204 reads the first standard Magnetic Field intensity value and first reception magnetic field is strong
Angle value, and calculate the difference between the first reception field strength values and the first standard Magnetic Field intensity value.If judging institute
It states difference and is zero or falls into the error range of permission that the induction sensitivity for then incuding key 300 meets the requirements, be not required to correct,
Then flow terminates.If the difference is not fallen in the range of error permission, need that induction key 300 is continued to correct, into step
Rapid S107.
Step S107：Signal source 10 emits the second low frequency signal, and second low frequency signal includes that the second standard Magnetic Field is strong
Angle value；Induction key 300 receives second low frequency signal.Specifically, low frequencies control module 102 controls signal source 10
Low frequencies unit 13 emits second low frequency signal, and second low frequency signal includes one strong with first standard Magnetic Field
The different second standard Magnetic Field intensity value of angle value；The low frequency reception unit 304 of induction key 300 receives the second low frequency letter
Number, and identify the field strength values for the second low frequency signal that it is received.Remember that low frequency reception unit 304 receives described second is low
The field strength values of frequency signal are the second reception field strength values.
Step S109：Incude key 300 and emit the second high-frequency signal to arithmetic unit 20, second high-frequency signal includes
Described second receives field strength values；Arithmetic unit 20 receives second high-frequency signal.Specifically, high-frequency emission control module
104 Perceived controls answer the high-frequency emission unit 306 of key 300 to send second high-frequency signal to arithmetic unit 20, and described second
High-frequency signal includes the second reception field strength values.The transmission unit 202 of arithmetic unit 20 receives the second high frequency letter
Number, and obtain described second from second high-frequency signal and receive field strength values.
Step S111：The second standard Magnetic Field intensity value is prestored in the third storage unit 201 of arithmetic unit 20.Fortune
Calculation device 20 calculates the difference between the second reception field strength values and the second standard Magnetic Field intensity value.Specifically,
The control of analytic operation module 106 arithmetic element 204 reads the second standard Magnetic Field intensity value and second reception magnetic field is strong
Angle value, and calculate the difference between the second reception field strength values and the second standard Magnetic Field intensity value.
Step S113：Arithmetic unit 20 receives field strength values and the first standard Magnetic Field intensity value according to described first
Between difference and second receive the difference between field strength values and the second standard Magnetic Field intensity value, calculate induction key
300 receive the error degree of magnetic field signal and eliminate the Error Compensation Algorithm needed for the error.
Specifically, analytic operation module 106 controls arithmetic element 204 and establishes the first standard Magnetic Field intensity value and described
First function relationship and described first between second standard Magnetic Field intensity value receive field strength values and the second reception magnetic
Second function relationship between field intensity value, while establishing between the first function relationship and the second function relationship
Mapped function relation.The mapped function relation is the Error Compensation Algorithm eliminated needed for the error.In the present embodiment,
Offset and slope differences of the mapped function relation by first function relationship relative to the second function relationship determine.
Step S115：Arithmetic unit 20 continues the Error Compensation Algorithm being back to induction key 300, incudes key
300 receive and store the Error Compensation Algorithm.Specifically, 108 controlling transmission unit 202 of correction module is by the mapping function
Relationship is transmitted and is stored into the first storage unit 302 of induction key 300.
Step S117：Signal source 10 sends third low frequency signal, and the third low frequency signal includes that third standard Magnetic Field is strong
Angle value；Induction key 300 receives the third low frequency signal.Specifically, low frequencies control module 102 controls signal source again
10 low frequencies unit 13 emits a third low frequency signal, while the Helmholtz coil 15 being connect with low frequencies unit 13
Magnetic field is got, it includes that third emits field strength values to make the third low frequency signal, and third transmitting field strength values are the
Three standard Magnetic Field intensity values.The low frequency reception unit 304 of induction key 300 receives the third low frequency signal, and identifies that it connects
The field strength values of the third low frequency signal of receipts.The magnetic field for the third low frequency signal that note low frequency reception unit 304 receives
Intensity value is that third receives field strength values.
Step S119：Incude the application Error Compensation Algorithm of key 300 and field strength values progress is received to the third
After compensation calculation, third approximate test field strength values are obtained；Induction key 300 continues to send third high frequency to arithmetic unit 20
Signal, the third high-frequency signal include the third approximate test field strength values.Specifically, incude the processing of key 300
After unit 308 recalculates third reception field strength values using the mapped function relation, third approximation is obtained
Standard Magnetic Field intensity value.High-frequency emission unit 306 sends a third high-frequency signal, the third high-frequency signal to arithmetic unit 20
Including the third approximate test field strength values.
Step S121：The third standard Magnetic Field intensity value is prestored in the third storage unit 201 of arithmetic unit 20.Fortune
It calculates device 20 and calculates the difference between the third approximation field strength values and the third standard Magnetic Field intensity value.Specifically,
Analytic operation module 106 controls arithmetic element 204 and reads the first standard Magnetic Field intensity value and the third approximate magnetic field strength
Angle value, and calculate the difference between the third approximation field strength values and the third standard Magnetic Field intensity value.If judging institute
It states difference and is zero or falls into the error range of permission that the induction sensitivity for then incuding key 300 meets the requirements, this correction stream
Journey terminates.If the difference is not fallen in the range of error permission, needs that induction key 300 is continued to correct, enter step
S101-S121。
The induction key correction system and bearing calibration of the present invention, emits twice that low frequency signal is simultaneously using signal source 10 successively
Get the magnetic field of respective strengths simultaneously, induction key 300 by the Magnetic Field received twice be sent to arithmetic unit 20 with
Magnetic field intensity standard value compares operation and obtains mapped function relation for correction, when signal source 10 gets magnetic field again,
The correction system allows induction key 300 to obtain the magnetic field intensity after correction according to the mapped function relation, to improve induction
Accuracy and stability of the key 300 to induction of signal.
It is appreciated that the correction system 100 can correct multiple induction keys 300 with storage and calculation function simultaneously.
Embodiment of above is merely illustrative of the technical solution of the present invention and unrestricted, although with reference to the above preferable embodiment party
Formula describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to technical scheme of the present invention
It modifies or equivalent replacement should not all be detached from the spirit and scope of technical solution of the present invention.
Claims (8)
1. a kind of induction key corrects system, it is applied on induction key, signal source and arithmetic unit；The induction key case
Include the first storage unit, low frequency reception unit, high-frequency emission unit and processing unit；The signal source includes the second storage unit
And low frequencies unit；The arithmetic unit includes third storage unit, transmission unit and arithmetic element, and the third storage is single
Member the first standard Magnetic Field intensity of default storage and the second standard Magnetic Field intensity；The induction key corrects system：
Low frequencies control module sends the first low frequency signal and the second low frequency letter successively for controlling the low frequencies unit
Number, first low frequency signal includes the first standard Magnetic Field intensity value, and second low frequency signal includes second mark
Quasi- field strength values；The first standard Magnetic Field intensity value is differed with the second standard Magnetic Field intensity value；The induction key
Spoon receives first low frequency signal and second low frequency signal successively, and identifies first low frequency signal received
Magnetic field intensity is the first reception field strength values, and identifies that the magnetic field intensity of second low frequency signal received connects for second
Receive field strength values；
High-frequency emission control module sends the first high-frequency signal and the second high frequency letter successively for controlling the high-frequency emission unit
Number, first high-frequency signal and second high-frequency signal separately include described first and receive field strength values and described second
Receive field strength values；
Analytic operation module is successively read the first standard Magnetic Field intensity value and described first for controlling the arithmetic element
Receive field strength values and the second standard Magnetic Field intensity value and the second reception field strength values；And calculate compensation
The standard Magnetic Field intensity that the reception field strength values and the low frequencies unit that the low frequency reception unit is received are emitted
The required Error Compensation Algorithm of error between value；And
Correction module sends the Error Compensation Algorithm, to allow for controlling the transmission unit to the induction key
State induction key uses the Error Compensation Algorithm to received reception magnetic field intensity when receiving next low frequency signal
Value compensates operation；
Wherein, the low frequencies control module is additionally operable to when judging that the error does not fall within a preset error range, control
It makes the low frequencies unit to continue to send another low frequency signal, system is corrected again to the induction key to allow to incude key
Spoon is corrected, until the error falls into the preset error range；
The analytic operation module receives field strength values, described the according to the first standard Magnetic Field intensity value, described first
Two standard Magnetic Field intensity values and the second reception field strength values, establish the first standard Magnetic Field intensity value and described second
First function relationship between standard Magnetic Field intensity value, and establish described first and receive field strength values and the second reception magnetic
Second function relationship between field intensity value, and establish the mapping between the first function relationship and the second function relationship
Functional relation, the mapped function relation are the Error Compensation Algorithm.
2. induction key corrects system as described in claim 1, it is characterised in that：The analytic operation module is additionally operable to sentencing
When the error of breaking falls into the preset error range, controls the low frequencies unit and stop sending low frequency signal.
3. induction key corrects system as described in claim 1, it is characterised in that：The mapped function relation is by described first
Functional relation is determined relative to the offset and slope differences of the second function relationship.
4. induction key corrects system as described in claim 1, it is characterised in that：The high-frequency emission control module and described
Correction module is the mould for the programmable that is stored in first storage unit, and can be executed by first storage unit
Block.
5. induction key corrects system as described in claim 1, it is characterised in that：The low frequencies control module is storage
And it can be by the module of the programmable of second storage unit execution in second storage unit.
6. induction key corrects system as described in claim 1, it is characterised in that：The analytic operation module is is stored in
The module for the programmable stated in third storage unit, and can executed by the third storage unit.
7. a kind of induction key bearing calibration is applied on induction key, signal source and arithmetic unit；The induction key case
Include the first storage unit, low frequency reception unit, high-frequency emission unit and processing unit；The signal source includes the second storage unit
And low frequencies unit；The arithmetic unit includes third storage unit, transmission unit and arithmetic element, and the third storage is single
The first standard Magnetic Field intensity of the default storage of member, the second standard Magnetic Field intensity and third standard Magnetic Field intensity；The induction key school
Correction method includes step：
It controls the low frequencies unit and sends the first low frequency signal, first low frequency signal includes first standard Magnetic Field
Intensity value；The induction key receives first low frequency signal, and identifies the magnetic field of first low frequency signal received
Intensity is the first reception field strength values；
It controls the high-frequency emission unit and sends the first high-frequency signal, first high-frequency signal includes first reception magnetic field
Intensity value；
It controls the transmission unit and receives first high-frequency signal；
It controls the arithmetic element and reads the first standard Magnetic Field intensity value and the first reception field strength values, and calculate
The first difference between the first standard Magnetic Field intensity value and the first reception field strength values；
If judging, if first difference does not fall within a preset error range, controls the low frequencies unit and sends second
Low frequency signal, second low frequency signal include the second standard Magnetic Field intensity value；The second standard Magnetic Field intensity value with
The first standard Magnetic Field intensity value differs；The induction key receives second low frequency signal and identifies the institute received
The magnetic field intensity for stating the second low frequency signal is the second reception field strength values；
It controls the high-frequency emission unit and sends the second high-frequency signal, second high-frequency signal includes second reception magnetic field
Intensity value；
It controls the transmission unit and receives second high-frequency signal；
It controls the arithmetic element and reads the second standard Magnetic Field intensity value and the second reception field strength values, and calculate
Go out to compensate the reception field strength values that the low frequency reception unit is received and the standard magnetic that the low frequencies unit is emitted
The required Error Compensation Algorithm of error between field intensity value；
It controls the transmission unit and sends the Error Compensation Algorithm to the induction key；
It controls the low frequencies unit and sends third low frequency signal, the third low frequency signal includes the third standard Magnetic Field
Intensity value；The induction key receives the third low frequency signal and identifies that the magnetic field of the third low frequency signal received is strong
Degree is that third receives field strength values；
Control the processing unit with the Error Compensation Algorithm by the third reception field strength values recalculate after, obtain
To an approximate test field strength values；
The high-frequency emission unit transmitting third high-frequency signal is controlled, the third high-frequency signal includes the approximate test magnetic field
Intensity value；
It controls the arithmetic element and reads the third standard Magnetic Field intensity value and the approximate test field strength values, and calculate
The second difference between the third standard Magnetic Field intensity value and the approximate test field strength values；
If judging, if second difference does not fall within the preset error range, continues above-mentioned aligning step, until described
First difference or second difference fall into the preset error range；
Wherein, in the step of calculating the Error Compensation Algorithm, the arithmetic element is controlled according to first standard Magnetic Field
Intensity value, described first receive field strength values, the second standard Magnetic Field intensity value and the second reception field strength values,
The first function relationship between the first standard Magnetic Field intensity value and the second standard Magnetic Field intensity value is established, and establishes institute
The second function relationship between the first reception field strength values and the second reception field strength values is stated, and establishes described first
Mapped function relation between functional relation and the second function relationship, the mapped function relation are calculated for the error compensation
Method.
8. induction key bearing calibration as claimed in claim 7, it is characterised in that：If judging first difference or second poor
If value falls into the preset error range, terminate above-mentioned aligning step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215123.1A CN106204808B (en) | 2015-04-30 | 2015-04-30 | Incude key correction system and bearing calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215123.1A CN106204808B (en) | 2015-04-30 | 2015-04-30 | Incude key correction system and bearing calibration |
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| CN106204808A CN106204808A (en) | 2016-12-07 |
| CN106204808B true CN106204808B (en) | 2018-11-02 |
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| CN109917335B (en) * | 2019-03-29 | 2021-04-20 | 北京经纬恒润科技股份有限公司 | Method and device for calibrating received signal strength |
| CN114109145A (en) * | 2021-11-26 | 2022-03-01 | 深圳市道通科技股份有限公司 | Compensation calibration equipment, system and method for automobile intelligent key |
| CN115830748B (en) * | 2022-11-24 | 2023-11-24 | 远峰科技股份有限公司 | Intelligent cabin digital key positioning calibration method and device |
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| US5802114A (en) * | 1997-06-04 | 1998-09-01 | Ericsson Inc. | Method and apparatus for modulation differentiation |
| CN101762795B (en) * | 2009-12-31 | 2013-01-23 | 上海舜宇海逸光电技术有限公司 | Optical fiber magneto-optic detection system and method |
| CN101858942B (en) * | 2010-01-29 | 2012-05-23 | 重庆长安汽车股份有限公司 | Low-frequency calibration system and method of key-free access control system for car |
| KR101141807B1 (en) * | 2010-03-03 | 2012-05-07 | 한국오므론전장주식회사 | Apparatus for automatically controlling receive signal strength indicator of radio frequency signal in smart key remote controller |
| CN102312616B (en) * | 2010-06-29 | 2014-05-14 | 马瑞利汽车电子(广州)有限公司 | Method and system for passive entry and passive start |
| US20150004917A1 (en) * | 2013-07-01 | 2015-01-01 | Trw Automotive U.S. Llc | Low level, low frequency signal measurement |
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