CN106204808A - Sensing key correction system and bearing calibration - Google Patents
Sensing key correction system and bearing calibration Download PDFInfo
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- CN106204808A CN106204808A CN201510215123.1A CN201510215123A CN106204808A CN 106204808 A CN106204808 A CN 106204808A CN 201510215123 A CN201510215123 A CN 201510215123A CN 106204808 A CN106204808 A CN 106204808A
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Abstract
A kind of sensing key correction system, including signal source and arithmetic unit, this signal source is for producing and launching low frequency signal and magnetic field to this sensing key；This sensing key can sense the low frequency signal that this signal source sends and the Magnetic Field sensed sends to arithmetic unit；This arithmetic unit is for obtaining field strength values and itself and magnetic field intensity standard value being made computing to show that correction senses the Error Compensation Algorithm needed for key sensitivity, simultaneously by Error Compensation Algorithm transmission to this sensing key from this Magnetic Field.When sensing key and being received again by low frequency signal and magnetic field, it corrects its magnetic field intensity sensed according to Error Compensation Algorithm.The present invention also provides for a kind of sensing key bearing calibration.Utilize the present invention can improve sensing key to the accuracy of induction of signal and stability.
Description
Technical field
The present invention relates to a kind of sensing key correction system and bearing calibration.
Background technology
Raising automotive safety protection aspect required based on people, PKE(Passive
Keyless Entry, passive without spoon entrance) technology arises at the historic moment.In existing PEK system, driver needs to be come by button that remote control is opened, the function such as lock door, and uses novel PKE system, and driver need not carry out any operation, only need to carry with a sensitive key.
When driver enters appointment scope, PEK sensing key can sense the low frequency low frequency signal that automobile sends, and low frequency signal is sent back to automobile to realize functions such as opening, lock door by UHF high-frequency signal emitter after authentication processing.In order to ensure that the battery life of PKE sensing key is unlikely to consume excessively at short notice, just can be waken up when it only receives the low frequency low frequency signal with enough magnetic field intensities.Therefore, sensing stability and the accuracy in low frequency signal magnetic field are particularly important by sensing key, but; owing to being affected by hardware designs framework; the magnetic field induction of PKE sensing key often there will be deviation, causes the low frequency signal sensing instability sending automobile, maloperation occurs.
Summary of the invention
In view of the foregoing, it is necessary to provide one sensing key correction system and bearing calibration, to improve sensing key to the accuracy of induction of signal and stability.
A kind of sensing key correction system, it is applied to sense on key, signal source and arithmetic unit；Described sensing key includes the first memory element, low frequency reception unit, high-frequency emission unit and processing unit；Described signal source includes the second memory element and low frequencies unit；Described arithmetic unit includes the 3rd memory element, transmission unit and arithmetic element, and described 3rd memory element presets storage the first standard Magnetic Field intensity and the second standard Magnetic Field intensity；Described sensing key correction system includes:
Low frequencies control module, the first low frequency signal and the second low frequency signal is sent successively for controlling described low frequencies unit, described first low frequency signal comprises described first standard Magnetic Field intensity level, and described second low frequency signal comprises described second standard Magnetic Field intensity level；Described first standard Magnetic Field intensity level differs with described second standard Magnetic Field intensity level；Described sensing key receives described first low frequency signal and described second low frequency signal successively, and identify that the magnetic field intensity of described first low frequency signal received is the first reception field strength values, and identify that the magnetic field intensity of described second low frequency signal received is the second reception field strength values；
High-frequency emission control module, for control described high-frequency emission unit send successively the first high-frequency signal and the second high-frequency signal, described first high-frequency signal and described second high-frequency signal comprise respectively described first receive field strength values and described second receive field strength values；
Analytic operation module, is used for controlling described arithmetic element and is successively read described first standard Magnetic Field intensity level and described first reception field strength values, and described second standard Magnetic Field intensity level and described second receives field strength values；And calculate the Error Compensation Algorithm compensating the reception field strength values that received of described low frequency reception unit and required for error between standard Magnetic Field intensity level that described low frequencies unit is launched；And
Correction module, is used for controlling described transmission unit and sends described backoff algorithm to described sensing key, to allow described sensing key to use when receiving next low frequency signal described backoff algorithm that its reception field strength values received is compensated computing；
Wherein, described low frequencies control module is additionally operable to when judging that described error does not falls within the range of error that presets, control described low frequencies unit to continue to send another low frequency signal, to allow sensing key correction system again described Intelligent key to be corrected, until described error falls into described default range of error.
A kind of sensing key bearing calibration, it is applied to sense on key, signal source and arithmetic unit；Described sensing key includes the first memory element, low frequency reception unit high-frequency emission unit and processing unit；Described signal source includes the second memory element and low frequencies unit；Described arithmetic unit includes the 3rd memory element, transmission unit and arithmetic element, and described 3rd memory element presets storage the first standard Magnetic Field intensity, the second standard Magnetic Field intensity and the 3rd standard Magnetic Field intensity；Described sensing key bearing calibration includes step:
Controlling described low frequencies unit and send the first low frequency signal, described first low frequency signal comprises described first standard Magnetic Field intensity level；Described sensing key receives described first low frequency signal, and identifies that the magnetic field intensity of described first low frequency signal received is the first reception field strength values；
Controlling described high-frequency emission unit and send the first high-frequency signal, described first high-frequency signal comprises described first and receives field strength values；
Control described communication unit and receive described first high-frequency signal；
Control described arithmetic element and read described first standard Magnetic Field intensity level and described first reception field strength values, and calculate the first difference between described first standard Magnetic Field intensity level and described first reception field strength values；
If judging, if described first difference does not falls within a range of error preset, then control described low frequencies unit and send the second low frequency signal, and described second low frequency signal comprises described second standard Magnetic Field intensity level；Described second standard Magnetic Field intensity level differs with described first standard Magnetic Field intensity level；The magnetic field intensity of described second low frequency signal that described sensing key described second low frequency signal of reception identification receive is the second reception field strength values；
Controlling described high-frequency emission unit and send the second high-frequency signal, described second high-frequency signal comprises described second and receives field strength values；
Control described communication unit and receive described second high-frequency signal；
Control described arithmetic element to read described second standard Magnetic Field intensity level and described second and receive field strength values, and calculate the Error Compensation Algorithm compensating the reception field strength values that received of described low frequency reception unit and required for error between standard Magnetic Field intensity level that described low frequencies unit is launched；
Control described transmission unit and send described backoff algorithm to described sensing key;
Controlling described low frequencies unit and send the 3rd low frequency signal, described 3rd low frequency signal comprises described 3rd standard Magnetic Field intensity level；The magnetic field intensity of described 3rd low frequency signal that described sensing key described 3rd low frequency signal of reception identification receive is the 3rd reception field strength values；
Controlling described processing unit uses described mapped function relation to receive the described 3rd after field strength values recalculates, and obtains an approximate test field strength values；
Controlling described high-frequency emission unit and launch the 3rd high-frequency signal, described 3rd high frequency signal packet is containing described seemingly mark standard Magnetic Field intensity level；
Control described arithmetic element and read described 3rd standard Magnetic Field intensity level and described approximate test field strength values, and calculate the second difference between described 3rd standard Magnetic Field intensity level and described approximate test field strength values；
If judging, if described second difference does not falls within described default error allowed band, then continue above-mentioned aligning step, until described first difference or described second difference fall into described default error allowed band.
The sensing key correction system of the present invention and bearing calibration, signal source is utilized to launch twice low frequency signal successively and get the magnetic field of respective strengths simultaneously, the sensing Magnetic Field that receives twice of key sends and draws the mapped function relation for correction to arithmetic unit comparing computing with magnetic field intensity standard value, when signal source gets magnetic field again, this correction system allows sensing key to draw the magnetic field intensity after correction according to this mapped function relation, thus improves sensing key to the accuracy of induction of signal and stability.
Accompanying drawing explanation
Fig. 1 is the functional block diagram sensing key correction system in an embodiment of the present invention.
Fig. 2 is the functional block diagram of the running environment of vehicle sensing key correction system in an embodiment of the present invention.
Fig. 3-4 is the flow chart sensing key bearing calibration in an embodiment of the present invention.
Main element symbol description
| Sensing key correction system | S1 |
| Low frequencies control module | 102 |
| High-frequency emission control module | 104 |
| Analytic operation module | 106 |
| Correction module | 108 |
| Sensing key | 300 |
| First memory element | 302 |
| Low frequency reception unit | 304 |
| High-frequency emission unit | 306 |
| Processing unit | 308 |
| Signal source | 10 |
| Second memory element | 11 |
| Low frequencies unit | 13 |
| Helmholtz coil | 15 |
| Arithmetic unit | 20 |
| 3rd memory element | 201 |
| Transmission unit | 202 |
| Arithmetic element | 204 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment the present invention is provided sensing key correction system 100 be described in further detail.
Being a kind of functional block diagram sensing key correction system S1 please also refer to Fig. 1 and Fig. 2, Fig. 1, sensing key correction system S1 runs in the signal source 10 shown in Fig. 2, arithmetic unit 20 and sensing key 300.Sensing key 300 has storage and calculation function, and sensing key correction system S1 is for correcting the sensing external signal that received of key 300, to improve sensing key 300 to the stability of magnetic field induction and accuracy.
Specifically, sensing key 300 is able to receive that the external signal that signal source 10 is launched the intensity identifying described external signal, described external signal is during sending and receiving, certain error value is there may be between signal intensity and sensing signal intensity received by key 300 that described signal source 10 is launched, described sensing key correction system S controls arithmetic unit 20 and detects and calculate described error amount, and the signal intensity received by sensing key 300 is compensated, make described sensing key 300 can sense the intensity of the signal that described signal source 10 is launched exactly.
Sensing key correction system S1 includes low frequencies control module 102, high-frequency emission control module 104, analytic operation module 106 and correction module 108.
Low frequencies control module 102 launches a low frequency signal for control signal source 10 to sensing key 300, and described low frequency signal comprises magnetic field intensity value information.High-frequency emission control module 104 answers key 300 to launch a high-frequency signal to arithmetic unit 20 for Perceived control, and described high-frequency signal comprises the magnetic field intensity value information of the described low frequency signal that described sensing key 300 is received.Error amount between low frequency signal magnetic field intensity and sensing low frequency signal magnetic field intensity received by key 300 that analytic operation module 106 is launched for computational analysis signal source 10.Described correction module 108 eliminates the magnetic field intensity Error Compensation Algorithm required for described error amount or magnetic field intensity error compensation value for sending to sensing key 300.
In the present embodiment, sensing key 300 includes the first memory element 302, low frequency reception unit 304, high-frequency emission unit 306 and processing unit 308.
Processing unit 308 is for providing calculation function for sensing key 300.First memory element 302 is for providing storage function for sensing key 300, and is used for storing high-frequency emission control module 104.Low frequency reception unit 304 answers key 300 to receive described low frequency signal for sensing the low frequency signal around sensing key 300 start feeling, comprises field strength values in described low frequency signal.High-frequency emission unit 306, for launching a high-frequency signal to arithmetic unit 20, comprises the field strength values of the low frequency signal that low frequency reception unit 304 is received in described high-frequency signal.
Signal source 10 includes the second memory element 11, low frequencies unit 13 and the Helmholtz coil 15 being connected with low frequencies unit 13.
Second memory element 11 is for providing storage function for signal source 10, and is used for storing low frequencies control module 102.Low frequencies unit 13 produces low frequency signal and exports relevant voltage to described Helmholtz coil 15 for compartment of terrain.Uniform standard Magnetic Field got with low frequencies unit 13 by Helmholtz coil 15 after being connected so that low frequencies unit 13 sends a low frequency signal to allow the low frequency reception unit 304 of sensing key 300 to receive to periphery.Described low frequency signal comprises the standard Magnetic Field intensity of described standard Magnetic Field.In the present embodiment, the axle immediate vicinity of Helmholtz coil 15 is used for placing sensing key 300, described low frequency signal and field signal can be sensed and answered key 300 with start feeling by sensed key 300, so that the low frequency reception unit 304 of sensing key 300 receives described low frequency signal, thus allow high-frequency emission unit 306 to launch described high-frequency signal, described high-frequency signal comprises the field strength values of the low frequency signal that low frequency reception unit 304 is received.
Arithmetic unit 20 includes the 3rd memory element 201, transmission unit 202 and arithmetic element 204.Arithmetic unit 20 can be the electronic installation such as computer, mobile phone, it is also possible to for being integrated in the operation program in sensing key 300.
3rd memory element 201 is for providing storage function for arithmetic unit 20, and is used for storing analytic operation module 106 and correction module 108.In present embodiment, before sensing key 300 is corrected, the 3rd memory element 201 prestores the magnetic field intensity standard value in the magnetic field that signal source 10 produces.Transmission unit 202 and the high-frequency emission unit 306 sensing key 300 set up radio communication, it is for receiving the high-frequency signal that sensing key 300 sends, and is simultaneously used for the described Error Compensation Algorithm that calculated by arithmetic unit 20 or error compensation value sends to sensing key 300.In the present embodiment, transmission unit 202 is UHF high-frequency signal emitting/receiving.Arithmetic element 204 is for obtaining the field strength values of the low frequency signal that low frequency reception unit 304 is received from the high-frequency signal that the high-frequency emission unit 306 of sensing key 300 is launched, and the magnetic field intensity standard value prestored in described field strength values the 3rd memory element 201 compares computing to draw the Error Compensation Algorithm needed for the error eliminated between described field strength values and magnetic field intensity standard value.
Referring to Fig. 1, the modules of sensing key correction system S1 is the module of the programmable being stored in the first memory element 302 and/or the second memory element 11 and/or the 3rd memory element 201 and can being performed by the first memory element 302 and/or the second memory element 11 and/or the 3rd memory element 201.In the present embodiment, during low frequencies control module 102 is stored in the second memory element 11 and can be performed by low frequencies unit 13；High-frequency emission control module 104 and correction module 108 are stored in the first memory element 302, and can be performed by high-frequency emission unit 306；Analytic operation module 106 is stored in the 3rd memory element 201, and can be performed by arithmetic element 204.
The program of above-mentioned each module performs specific as follows:
The low frequencies unit 13 in low frequencies control module 102 control signal source 10 launches the first low frequency signal, magnetic field got by the Helmholtz coil 15 being simultaneously connected with low frequencies unit 13, making described first low frequency signal comprise the first transmitting field strength values, described first transmitting field strength values is the first standard Magnetic Field intensity level.
The low frequency reception unit 304 of sensing key 300 receives described first low frequency signal, and identifies the field strength values of its first low frequency signal received.The field strength values of described first low frequency signal that note low frequency reception unit 304 receives is the first reception field strength values.
High-frequency emission control module 104 Perceived control answers the high-frequency emission unit 306 of key 300 to send one first high-frequency signal to arithmetic unit 20, and described first high-frequency signal comprises described first and receives field strength values.
3rd memory element 201 of arithmetic unit 20 prestores described first standard Magnetic Field intensity level.The transmission unit 202 of arithmetic unit 20 receives described first high-frequency signal, and obtains described first reception field strength values from described first high-frequency signal.Analytic operation module 106 controls arithmetic element 204 and reads described first standard Magnetic Field intensity level and described first reception field strength values, and calculates the difference between described first reception field strength values and described first standard Magnetic Field intensity level.If judging, described difference is zero or falls in the range of error of permission, then the induction sensitivity of sensing key 300 meets the requirements, and is not required to correction, then flow process terminates.If described difference does not falls within the range of error permission, then need sensing key 300 is continued correction.
The low frequencies unit 13 in low frequencies control module 102 control signal source 10 again launches one second low frequency signal, magnetic field got by the Helmholtz coil 15 being simultaneously connected with low frequencies unit 13, described second low frequency signal is made to comprise the second transmitting field strength values, described second transmitting field strength values is the second standard Magnetic Field intensity level, and described second standard Magnetic Field intensity level is different from described first standard Magnetic Field intensity level.
The low frequency reception unit 304 of sensing key 300 receives described second low frequency signal, and identifies the field strength values of its second low frequency signal received.The field strength values of described second low frequency signal that note low frequency reception unit 304 receives is the second reception field strength values.
High-frequency emission control module 104 Perceived control answers the high-frequency emission unit 306 of key 300 to send one second high-frequency signal to arithmetic unit 20, and described second high-frequency signal comprises described second and receives field strength values.
3rd memory element 201 of arithmetic unit 20 prestores described second standard Magnetic Field intensity level.The transmission unit 202 of arithmetic unit 20 receives described second high-frequency signal, and obtains described second reception field strength values from described second high-frequency signal.Analytic operation module 106 controls arithmetic element 204 and reads described second standard Magnetic Field intensity level and described second reception field strength values, and calculates the difference between described second reception field strength values and described second standard Magnetic Field intensity level.
Analytic operation module 106 controls arithmetic element 204 and sets up one first functional relationship and one second functional relationship, and described first functional relationship is the linear functional relation between described first standard Magnetic Field intensity level and described second standard Magnetic Field intensity level；Described second functional relationship is the described first linear functional relation receiving between field strength values and described second reception field strength values.
Arithmetic element 204 continues to calculate, and sets up the mapped function relation between described first functional relationship and described one second functional relationship.When described mapped function relation is applied in described second functional relationship, enable to described first receive field strength values and described second and receive field strength values after conversion, respectively ad infinitum close to described first standard Magnetic Field intensity level and described second standard Magnetic Field intensity level.In other words, described first receives field strength values after applying mechanically described mapped function relation, can obtain one first approximate test field strength values, described first approximate test field strength values receives field strength values closer to described first standard Magnetic Field intensity level compared to described first；Described second receives field strength values after applying mechanically described mapped function relation, can obtain one second approximate test field strength values, described second approximate test field strength values receives field strength values closer to described second standard Magnetic Field intensity level compared to described second.It is appreciated that described first approximate test field strength values and described second approximate test field strength values can be distinguished ad infinitum close to described first standard Magnetic Field intensity level and described second standard Magnetic Field intensity level.In the present embodiment, described mapped function relation is determined relative to side-play amount and the slope differences of described second functional relationship by described first functional relationship.
Correction module 108 controls transmission unit 202 and described mapped function relation is transmitted and stored to the first memory element 302 of sensing key 300.
The low frequencies unit 13 in low frequencies control module 102 control signal source 10 again launches one the 3rd low frequency signal, magnetic field got by the Helmholtz coil 15 being simultaneously connected with low frequencies unit 13, making described 3rd low frequency signal comprise the 3rd transmitting field strength values, described 3rd transmitting field strength values is the 3rd standard Magnetic Field intensity level.
The low frequency reception unit 304 of sensing key 300 receives described 3rd low frequency signal, and identifies the field strength values of its 3rd low frequency signal received.The field strength values of described 3rd low frequency signal that note low frequency reception unit 304 receives is the 3rd reception field strength values.
After the described mapped function relation of field strength values application that the processing unit 308 of sensing key 300 receives the described 3rd recalculates, obtain one the 3rd approximate test field strength values.High-frequency emission unit 306 sends one the 3rd high-frequency signal to arithmetic unit 20, and described 3rd high frequency signal packet contains described 3rd approximate test field strength values.
3rd memory element 201 of arithmetic unit 20 prestores described 3rd standard Magnetic Field intensity level.The transmission unit 202 of arithmetic unit 20 receives described 3rd high-frequency signal, and obtains described 3rd approximate test field strength values from described 3rd high-frequency signal.Analytic operation module 106 controls arithmetic element 204 and reads described 3rd standard Magnetic Field intensity level and described 3rd approximate test field strength values, and calculates the difference between described 3rd approximate test field strength values and described 3rd standard Magnetic Field intensity level.If described difference is within the scope of error allows, the most above-mentioned correcting process terminates, if described difference does not falls within the scope that error allows, then repeats above-mentioned sensing key correcting process.
Sensing key correction system S1 of embodiment of the present invention can apply in the production of sensing key 300, and the signal received sensing key 300 by described mapped function relation carries out magnetic field intensity compensation, improves the sensitivity of sensing key 300.It is appreciated that sensing key correction system S1 can also be applied in the quality testing or maintenance of sensing key 300.
Even, sensing key correction system S1 can be applied in a vehicle control system.Specifically, signal source 10 can be arranged on a vehicle, and arithmetic unit 20 can be integrated in sensing key 300, can be arranged on described vehicle, it is also possible to be integrated in signal source 10.When the sensitivity that the user discover that sensing key 300 declines, key can be answered to correct system S1 with start feeling, use above-mentioned correcting process to obtain a new mapped function relation, sensing key 300 is re-calibrated, to improve its induction sensitivity.After sensing key 300 is corrected, first the magnetic field intensity of the low frequency signal that it is received is compensated calculating, perform next step operation further according to the magnetic field intensity after compensating.Such as, if the magnetic field intensity after Bu Changing falls into a preset range, sensing key 300 can control being turned on and off of described Vehicular door.Therefore, the sensitivity of the sensing key 300 of application sensing key correction system S1 is higher, it is possible to prevent the magnetic field intensity error because receiving to cause maloperation.
Refer to Fig. 3 and Fig. 4, Fig. 3 and Fig. 4 and show the flow chart sensing key bearing calibration in an embodiment of the present invention.The bearing calibration of described sensing key, comprises the steps:
Step S101: signal source 10 launches the first low frequency signal, described first low frequency signal comprises the first standard Magnetic Field intensity level；Sensing key 300 receives described first low frequency signal.Specifically, the low frequencies unit 13 in low frequencies control module 102 control signal source 10 launches described first low frequency signal, and described first low frequency signal comprises the first standard Magnetic Field intensity level；The low frequency reception unit 304 of sensing key 300 receives described first low frequency signal, and identifies the field strength values of its first low frequency signal received.The field strength values of described first low frequency signal that note low frequency reception unit 304 receives is the first reception field strength values.
Step S103: sensing key 300 launches the first high-frequency signal to arithmetic unit 20, described first high-frequency signal comprises described first and receives field strength values；Arithmetic unit 20 receives described first high-frequency signal.Specifically, high-frequency emission control module 104 Perceived control answers the high-frequency emission unit 306 of key 300 to send described first high-frequency signal to arithmetic unit 20, and described first high-frequency signal comprises described first and receives field strength values.The transmission unit 202 of arithmetic unit 20 receives described first high-frequency signal, and obtains described first reception field strength values from described first high-frequency signal.
Step S105: prestore described first standard Magnetic Field intensity level in the 3rd memory element 201 of arithmetic unit 20.Arithmetic unit 20 calculates described first and receives the difference between field strength values and described first standard Magnetic Field intensity level.Specifically, analytic operation module 106 controls arithmetic element 204 and reads described first standard Magnetic Field intensity level and described first reception field strength values, and calculates the difference between described first reception field strength values and described first standard Magnetic Field intensity level.If judging, described difference is zero or falls in the range of error of permission, then the induction sensitivity of sensing key 300 meets the requirements, and is not required to correction, then flow process terminates.If described difference does not falls within the range of error permission, then need sensing key 300 is continued correction, enter step S107.
Step S107: signal source 10 launches the second low frequency signal, described second low frequency signal comprises the second standard Magnetic Field intensity level；Sensing key 300 receives described second low frequency signal.Specifically, the low frequencies unit 13 in low frequencies control module 102 control signal source 10 launches described second low frequency signal, and described second low frequency signal comprises a second standard Magnetic Field intensity level differed with described first standard Magnetic Field intensity level；The low frequency reception unit 304 of sensing key 300 receives described second low frequency signal, and identifies the field strength values of its second low frequency signal received.The field strength values of described second low frequency signal that note low frequency reception unit 304 receives is the second reception field strength values.
Step S109: sensing key 300 launches the second high-frequency signal to arithmetic unit 20, described second high-frequency signal comprises described second and receives field strength values；Arithmetic unit 20 receives described second high-frequency signal.Specifically, high-frequency emission control module 104 Perceived control answers the high-frequency emission unit 306 of key 300 to send described second high-frequency signal to arithmetic unit 20, and described second high-frequency signal comprises described second and receives field strength values.The transmission unit 202 of arithmetic unit 20 receives described second high-frequency signal, and obtains described second reception field strength values from described second high-frequency signal.
Step S111: prestore described second standard Magnetic Field intensity level in the 3rd memory element 201 of arithmetic unit 20.Arithmetic unit 20 calculates described second and receives the difference between field strength values and described second standard Magnetic Field intensity level.Specifically, analytic operation module 106 controls arithmetic element 204 and reads described second standard Magnetic Field intensity level and described second reception field strength values, and calculates the difference between described second reception field strength values and described second standard Magnetic Field intensity level.
Step S113: arithmetic unit 20 receives the difference between field strength values and described first standard Magnetic Field intensity level and second according to described first and receives the difference between field strength values and described second standard Magnetic Field intensity level, calculates sensing key 300 and receives the error degree of field signal and eliminate the Error Compensation Algorithm needed for described error.
Specifically, analytic operation module 106 controls arithmetic element 204 and sets up the first functional relationship between described first standard Magnetic Field intensity level and described second standard Magnetic Field intensity level, and the second functional relationship between described first reception field strength values and described second reception field strength values, set up the mapped function relation between described first functional relationship and described one second functional relationship simultaneously.Described mapped function relation i.e. eliminates the Error Compensation Algorithm needed for described error.In the present embodiment, described mapped function relation is determined relative to side-play amount and the slope differences of described second functional relationship by the first functional relationship.
Step S115: arithmetic unit 20 continues to be back to described Error Compensation Algorithm sense key 300, sensing key 300 receives and stores described Error Compensation Algorithm.Specifically, correction module 108 control transmission unit 202 described mapped function relation is transmitted and is stored to sensing key 300 the first memory element 302 in.
Step S117: signal source 10 sends the 3rd low frequency signal, described 3rd low frequency signal comprises the 3rd standard Magnetic Field intensity level；Sensing key 300 receives described 3rd low frequency signal.Specifically, the low frequencies unit 13 in low frequencies control module 102 control signal source 10 again launches one the 3rd low frequency signal, magnetic field got by the Helmholtz coil 15 being simultaneously connected with low frequencies unit 13, making described 3rd low frequency signal comprise the 3rd transmitting field strength values, described 3rd transmitting field strength values is the 3rd standard Magnetic Field intensity level.The low frequency reception unit 304 of sensing key 300 receives described 3rd low frequency signal, and identifies the field strength values of its 3rd low frequency signal received.The field strength values of described 3rd low frequency signal that note low frequency reception unit 304 receives is the 3rd reception field strength values.
Step S119: after sensing key 300 applies described Error Compensation Algorithm that described 3rd reception field strength values is compensated calculating, obtain the 3rd approximate test field strength values；Sensing key 300 continues to send the 3rd high-frequency signal to arithmetic unit 20, and described 3rd high frequency signal packet contains described 3rd approximate test field strength values.Specifically, after described 3rd reception field strength values is applied described mapped function relation to recalculate by the processing unit 308 of sensing key 300, one the 3rd approximate test field strength values is obtained.High-frequency emission unit 306 sends one the 3rd high-frequency signal to arithmetic unit 20, and described 3rd high frequency signal packet contains described 3rd approximate test field strength values.
Step S121: prestore described 3rd standard Magnetic Field intensity level in the 3rd memory element 201 of arithmetic unit 20.Arithmetic unit 20 calculates the difference between described 3rd approximate magnetic field intensity value and described 3rd standard Magnetic Field intensity level.Specifically, analytic operation module 106 controls arithmetic element 204 and reads described first standard Magnetic Field intensity level and described 3rd approximate magnetic field intensity value, and calculates the difference between described 3rd approximate magnetic field intensity value and described 3rd standard Magnetic Field intensity level.If judging, described difference is zero or falls in the range of error of permission, then the induction sensitivity of sensing key 300 meets the requirements, and this correcting process terminates.If described difference does not falls within the range of error permission, then need sensing key 300 is continued correction, enter step S101-S121.
The sensing key correction system of the present invention and bearing calibration, signal source 10 is utilized to launch twice low frequency signal successively and get the magnetic field of respective strengths simultaneously, the sensing Magnetic Field that receives twice of key 300 sends and draws the mapped function relation for correction to arithmetic unit 20 comparing computing with magnetic field intensity standard value, when signal source 10 gets magnetic field again, this correction system allows sensing key 300 to draw the magnetic field intensity after correction according to this mapped function relation, thus improves sensing key 300 to the accuracy of induction of signal and stability.
Be appreciated that this correction system 100 can correct simultaneously multiple have storage and the sensing key 300 of calculation function.
Embodiment of above is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to above better embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent the most should not depart from the spirit and scope of technical solution of the present invention.
Claims (10)
1. a sensing key correction system, it is applied to sense on key, signal source and arithmetic unit；Described sensing key includes the first memory element, low frequency reception unit, high-frequency emission unit and processing unit；Described signal source includes the second memory element and low frequencies unit；Described arithmetic unit includes the 3rd memory element, transmission unit and arithmetic element, and described 3rd memory element presets storage the first standard Magnetic Field intensity and the second standard Magnetic Field intensity；Described sensing key correction system includes:
Low frequencies control module, the first low frequency signal and the second low frequency signal is sent successively for controlling described low frequencies unit, described first low frequency signal comprises described first standard Magnetic Field intensity level, and described second low frequency signal comprises described second standard Magnetic Field intensity level；Described first standard Magnetic Field intensity level differs with described second standard Magnetic Field intensity level；Described sensing key receives described first low frequency signal and described second low frequency signal successively, and identify that the magnetic field intensity of described first low frequency signal received is the first reception field strength values, and identify that the magnetic field intensity of described second low frequency signal received is the second reception field strength values；
High-frequency emission control module, for control described high-frequency emission unit send successively the first high-frequency signal and the second high-frequency signal, described first high-frequency signal and described second high-frequency signal comprise respectively described first receive field strength values and described second receive field strength values；
Analytic operation module, is used for controlling described arithmetic element and is successively read described first standard Magnetic Field intensity level and described first reception field strength values, and described second standard Magnetic Field intensity level and described second receives field strength values；And calculate the Error Compensation Algorithm compensating the reception field strength values that received of described low frequency reception unit and required for error between standard Magnetic Field intensity level that described low frequencies unit is launched；And
Correction module, is used for controlling described transmission unit and sends described backoff algorithm to described sensing key, to allow described sensing key to use when receiving next low frequency signal described backoff algorithm that its reception field strength values received is compensated computing；
Wherein, described low frequencies control module is additionally operable to when judging that described error does not falls within the range of error that presets, control described low frequencies unit to continue to send another low frequency signal, to allow sensing key correction system again described Intelligent key to be corrected, until described error falls into described default range of error.
2. sensing key correction system as claimed in claim 1, it is characterised in that: described analytic operation module is additionally operable to, when judging that described error falls into described default range of error, control described low frequencies unit and stop transmission low frequency signal.
3. sensing key correction system as claimed in claim 1, it is characterized in that: described analytic operation module is according to described first standard Magnetic Field intensity level, described first receives field strength values, described second standard Magnetic Field intensity level and described second receives field strength values, set up the first functional relationship between described first standard Magnetic Field intensity level and described second standard Magnetic Field intensity level, and set up the second functional relationship between described first reception field strength values and described second reception field strength values, and set up the mapped function relation between described first functional relationship and described second functional relationship, described mapped function relation is described Error Compensation Algorithm.
4. sensing key correction system as claimed in claim 3, it is characterised in that: described mapped function relation is determined relative to side-play amount and the slope differences of described second functional relationship by described first functional relationship.
5. sensing key correction system as claimed in claim 1, it is characterised in that: described high-frequency emission control module and described correction module are for being stored in described first memory element, and the module of the programmable that can be performed by described first memory element.
6. sensing key correction system as claimed in claim 1, it is characterised in that: described low frequencies control module is the module of the programmable being stored in described second memory element and can being performed by described second memory element.
7. sensing key correction system as claimed in claim 1, it is characterised in that: described analytic operation module is for being stored in described 3rd memory element, and the module of the programmable that can be performed by described 3rd memory element.
8. a sensing key bearing calibration, it is applied to sense on key, signal source and arithmetic unit；Described sensing key includes the first memory element, low frequency reception unit high-frequency emission unit and processing unit；Described signal source includes the second memory element and low frequencies unit；Described arithmetic unit includes the 3rd memory element, transmission unit and arithmetic element, and described 3rd memory element presets storage the first standard Magnetic Field intensity, the second standard Magnetic Field intensity and the 3rd standard Magnetic Field intensity；Described sensing key bearing calibration includes step:
Controlling described low frequencies unit and send the first low frequency signal, described first low frequency signal comprises described first standard Magnetic Field intensity level；Described sensing key receives described first low frequency signal, and identifies that the magnetic field intensity of described first low frequency signal received is the first reception field strength values；
Controlling described high-frequency emission unit and send the first high-frequency signal, described first high-frequency signal comprises described first and receives field strength values；
Control described communication unit and receive described first high-frequency signal；
Control described arithmetic element and read described first standard Magnetic Field intensity level and described first reception field strength values, and calculate the first difference between described first standard Magnetic Field intensity level and described first reception field strength values；
If judging, if described first difference does not falls within a range of error preset, then control described low frequencies unit and send the second low frequency signal, and described second low frequency signal comprises described second standard Magnetic Field intensity level；Described second standard Magnetic Field intensity level differs with described first standard Magnetic Field intensity level；The magnetic field intensity of described second low frequency signal that described sensing key described second low frequency signal of reception identification receive is the second reception field strength values；
Controlling described high-frequency emission unit and send the second high-frequency signal, described second high-frequency signal comprises described second and receives field strength values；
Control described communication unit and receive described second high-frequency signal；
Control described arithmetic element to read described second standard Magnetic Field intensity level and described second and receive field strength values, and calculate the Error Compensation Algorithm compensating the reception field strength values that received of described low frequency reception unit and required for error between standard Magnetic Field intensity level that described low frequencies unit is launched；
Control described transmission unit and send described backoff algorithm to described sensing key;
Controlling described low frequencies unit and send the 3rd low frequency signal, described 3rd low frequency signal comprises described 3rd standard Magnetic Field intensity level；The magnetic field intensity of described 3rd low frequency signal that described sensing key described 3rd low frequency signal of reception identification receive is the 3rd reception field strength values；
Controlling described processing unit uses described mapped function relation to receive the described 3rd after field strength values recalculates, and obtains an approximate test field strength values；
Controlling described high-frequency emission unit and launch the 3rd high-frequency signal, described 3rd high frequency signal packet is containing described seemingly mark standard Magnetic Field intensity level；
Control described arithmetic element and read described 3rd standard Magnetic Field intensity level and described approximate test field strength values, and calculate the second difference between described 3rd standard Magnetic Field intensity level and described approximate test field strength values；
If judging, if described second difference does not falls within described default error allowed band, then continue above-mentioned aligning step, until described first difference or described second difference fall into described default error allowed band.
9. sensing key bearing calibration as claimed in claim 8, it is characterised in that: if if judging, when described first difference or the second difference fall into described default range of error, to terminate above-mentioned aligning step.
10. sensing key bearing calibration as claimed in claim 8, it is characterized in that: described analytic operation module is according to described first standard Magnetic Field intensity level, described first receives field strength values, described second standard Magnetic Field intensity level and described second receives field strength values, set up the first functional relationship between described first standard Magnetic Field intensity level and described second standard Magnetic Field intensity level, and set up the second functional relationship between described first reception field strength values and described second reception field strength values, and set up the mapped function relation between described first functional relationship and described second functional relationship, described mapped function relation is described Error Compensation Algorithm.
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Effective date of registration: 20190203 Address after: 518110 Dashuikeng Baoyuan Science Park, Guanlan Town, Longhua New District, Shenzhen City, Guangdong Province Patentee after: Fuding Precision Components (Shenzhen) Co.,Ltd. Address before: 518109, No. two, No. tenth, East Ring Road, Pinus tabulaeformis Industrial Zone, Longhua Town, Baoan District, Guangdong, Shenzhen, 2 Co-patentee before: Hon Hai Precision Industry Co., Ltd. Patentee before: Hongfujin Precise Industry (Shenzhen) Co., Ltd. |