CN111865443A - Calibrating device suitable for car intelligence does not have key access system - Google Patents
Calibrating device suitable for car intelligence does not have key access system Download PDFInfo
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- CN111865443A CN111865443A CN202010732561.6A CN202010732561A CN111865443A CN 111865443 A CN111865443 A CN 111865443A CN 202010732561 A CN202010732561 A CN 202010732561A CN 111865443 A CN111865443 A CN 111865443A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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Abstract
The invention provides a calibration device suitable for an intelligent keyless entry system of an automobile, which comprises: the device comprises a baseband signal modulation circuit, a switching circuit and a BCM receiving circuit; the LF signal modulated by the baseband signal modulation circuit is input to a switching circuit; a switching circuit connected to the coil part; the coil component is electrically connected with the BCM receiving circuit. In order to realize calibration of RKE in different Range ranges, the amplitude of an output signal of a Tektronix AFG-300 signal generator can be controlled by USB communication to control the size of the output signal, the switching of three axes X, Y and Z is realized by adopting serial port communication of a three-axis converter RF Switch and a Helmoltz three-axis coil, and the calibration accuracy of X, Y and Z in a space is solved. The invention solves the problems of optimization and automatic calculation of a calibration algorithm.
Description
Technical Field
The invention relates to the technical field of PKE calibration, in particular to a calibration device suitable for an intelligent keyless entry system of an automobile.
Background
When the PKE is calibrated in industrial production, the signal output accuracy is not high. Furthermore, calibration cannot be performed from the X, Y, Z triaxial space. The accuracy of the calibration algorithm is not high.
Patent document CN108872727A discloses a wireless test system for automobile remote control keys, which has the technical scheme that the wireless test system comprises a shielding box, a detection probe, a workstation and a signal analysis instrument, wherein the detection probe is arranged in the shielding box, and the shielding box comprises a turntable, a clamp, a mechanical arm and a detection ring; the rotary table is rotationally connected with the shielding box; the clamp is fixed on the rotary table and used for clamping the remote control key; the mechanical arm is movably connected with the shielding box and used for pressing a button on the remote control key; the axis of the detection ring is perpendicular to the axis of the rotary table and surrounds the outer side of the clamp; the detection probe is arranged on the detection ring and used for detecting radiation signals on the circumferential direction of the plane of the remote control key; the workstation is respectively connected with the mechanical arm, the detection probe and the rotary table; the signal analysis instrument is connected with the detection probe. There is still room for improvement in structure and performance.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a calibration device suitable for an intelligent keyless entry system of an automobile.
The invention provides a calibration device suitable for an intelligent keyless entry system of an automobile, which is characterized by comprising the following components: the device comprises a baseband signal modulation circuit, a switching circuit and a BCM receiving circuit; the LF signal modulated by the baseband signal modulation circuit is input into the switching circuit through a radio frequency line; the switching circuit is connected to X, Y and Z axes of a Helmoltz coil through radio frequency wires, and 3 switching circuits are connected; the coil component is electrically connected with the BCM receiving circuit.
Preferably, the method further comprises the following steps: a PKE antenna; and after the modulation signal sent by the coil component is received by the PKE antenna, the modulation signal is communicated with the BCM receiving circuit by the PKE antenna.
Preferably, the method further comprises the following steps: a Netway component; and the BCM receiving circuit is connected with the Netway component through CAN communication.
Preferably, the Netway component includes: a USB interface of a Netwoy component; the USB interface of the Netway component can collect data. And finally, the upper computer acquires data through a USB interface of the Netway.
Preferably, the method further comprises the following steps: a first radio frequency line; and the LF signal modulated by the baseband signal modulation circuit is input to the switching circuit through a first radio frequency line.
Preferably, the method further comprises the following steps: a second radio frequency line; the switching circuit is connected to X, Y, and Z axes of the coil part through a second radio frequency line.
Preferably, the number of the second radio frequency lines is 3.
Preferably, the switching circuit employs a three-axis RF switching circuit.
Preferably, the coil component is a Helmoltz coil.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the AFG 3011 signal generator is adopted to send the carrier wave with the LF frequency of 125KHz, the strength is 0.02Vpp, step is set to be 0.01v, and the Baseband Baseband signal generator is adopted to realize the strength measurement of the signal, so that the accuracy of the output signal is improved, and the problem of the accuracy of the PKE output signal is solved;
2. in order to realize calibration of RKE in different Range ranges, the amplitude of an output signal of a TektronixFG-300 signal generator can be controlled by utilizing USB communication to control the size of the output signal, and the three-axis switching of X, Y and Z is realized by adopting serial port communication of a three-axis converter RFswitch and a Helmoltz three-axis coil, so that the calibration accuracy of X, Y and Z in a space is solved;
3. the invention solves the problems of optimization and automatic calculation of the calibration algorithm by adopting a new calibration algorithm and programming by using Labview software.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic overall structure diagram in the embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1, the calibration device for an intelligent keyless entry system of a vehicle according to the present invention is characterized by comprising: the device comprises a baseband signal modulation circuit, a three-axis switching circuit and a BCM receiving circuit; the LF signal modulated by the baseband signal modulation circuit is input to a three-axis RF (X, Y, Z) switching circuit through a radio frequency line; the three-axis RF switching circuit is connected to X, Y and Z axes of the Helmoltz coil through radio frequency wires, and 3 in total; the coil component is electrically connected with the BCM receiving circuit.
Preferably, the method further comprises the following steps: a PKE antenna; and after the modulation signal sent by the coil component is received by the PKE antenna, the modulation signal is communicated with the BCM receiving circuit by the PKE antenna.
Preferably, the method further comprises the following steps: a Netway component; and the BCM receiving circuit is connected with the Netway component through CAN communication.
Preferably, the Netway component includes: a USB interface of a Netwoy component; the USB interface of the Netway component can collect data. And finally, the upper computer acquires data through a USB interface of the Netway.
Preferably, the method further comprises the following steps: a first radio frequency line; and the LF signal modulated by the baseband signal modulation circuit is input to the switching circuit through a first radio frequency line.
Preferably, the method further comprises the following steps: a second radio frequency line; the switching circuit is connected to X, Y, and Z axes of the coil part through a second radio frequency line.
Preferably, the number of the second radio frequency lines is 3.
Preferably, the switching circuit employs a three-axis RF switching circuit.
Preferably, the coil component is a Helmoltz coil.
Specifically, in one embodiment, the calibration system for PKE mainly includes: the device comprises a baseband signal modulation circuit, a three-axis switching circuit and a BCM receiving circuit, wherein LF signals modulated by the baseband signal modulation circuit CAN be input into the three-axis RF (X, Y and Z) switching circuit through radio frequency lines, the three-axis RF switching circuit is connected to the X, Y and Z axes of a Helmoltz coil through the radio frequency lines, 3 modulation signals are sent out, the modulation signals are received through an antenna of a PKE and then communicated with the BCM through the antenna, the BCM is connected with a Netway through CAN communication, and finally an upper computer collects data through a USB interface of the Netway.
1. Baseband signal modulation circuit
Tekronix AFG 3011 signal generator: the device is used for generating LF 125KHz signals, can also generate arbitrary waveforms of 10MHz,25MHz and 100MHz, and is used for Helmoltz coils to generate 3D uniform magnetic fields with different strengths.
BaseBand signal Generator BaseBand Generator (NXP): output DC voltage range: 0-5V, and providing a baseband signal for the Helmoltz coil.
2. Three-axis switching circuit
RF Switch switching: and (3) switching the three-axis signals of the Helmoltz coil by utilizing Relay Control, and respectively inputting the three-axis signals of the X, Y and Z into the Helmoltz coil.
3. BCM receiving circuit
If there is a pair of identical current-carrying circular coils parallel and coaxial to each other, with currents in the same direction, the total magnetic field of the two current-carrying coils is uniform over a large range near the midpoint of the axis when the coil spacing is equal to the coil radius. Therefore, the method has great practical value in production and scientific research and is also commonly used for the metering standard of the weak magnetic field. This pair of coils is called a helmholtz coil.
Technical indexes of the used coil are as follows: inductance measurement: (test frequency 125 kHz).
As shown in the table below, the 3D Helmoltz coil inductance test requirements are reflected.
| Test port | Measured value |
| X | 46.92uH |
| Y | 46.93uH |
| Z | 46.88uH |
Wherein, field intensity uniformity is measured: a frequency 125kHz, 1Vpp sine wave was tested.
As shown in the following table, the 3D Helmoltz coil measurements of the field strength at the coil center X/Y/Z-40- +40mm positions were reflected.
The actual deviation of the field strength in the range of 80 × 80mm is 0.2%, and the design requirement (unit: dBuA/m) of < 1% is satisfied.
The NETWAY Box communication protocol conversion Box mainly comprises two channels of HSCAN1 and HSCAN2, and is mainly used for communication and control of computers and products.
Specifically, in one embodiment, a calibration method for an automotive smart keyless entry system works by:
step S1: sending serial port commands F21240000004 ACF6 and F212400800036 CF 6;
step S2: confirming serial port feedback: F212000C A0F 6F 212000C A0F6 switches the RF Switch to X channel;
step S3: sending carrier wave with LF frequency of 125KHz by AFG 3011 signal generator, intensity of 0.02Vpp, step set to 0.01 v;
step S4: A3D Helmoltz coil for transmitting a BaseBand signal 11112222A10000000000FE by a BaseBand Generator (NXP), modulating the signal with a carrier wave of 125KHz and transmitting the modulated signal;
step S5: sending a CAN command: 06610102000000000000, respectively;
reading an RSSI value fed back from the BCM;
step S6: sending the signals with the AFG 3011 signal generator with the strength of 0.2Vpp,0.5Vpp, 1Vpp, 2Vpp, 8Vpp,15 Vpp, 20Vpp, and repeating the steps S3-S5;
step S7: calculating m, n according to the RSSI algorithm mentioned above, and reversely deducing bytes needing to be written, namely Byte1, Byte2 and Byte3 according to the algorithm;
step S8: sending 06610401 Byte1 Byte2 Byte 30000 to write a calibration value Page, and completing the calibration of the X axis;
step S9: the RF Switch is switched to the Y, Z channel, and the above steps S2-S8 are repeated.
According to the invention, the AFG 3011 signal generator is adopted to send the carrier wave with the LF frequency of 125KHz, the strength is 0.02Vpp, step is set to be 0.01v, and the Baseband Baseband signal generator is adopted to realize the strength measurement of the signal, so that the accuracy of the output signal is improved, and the problem of the accuracy of the PKE output signal is solved; in order to realize calibration of RKE in different Range ranges, the amplitude of an output signal of a Tektronix AFG-300 signal generator can be controlled by utilizing USB communication to control the amplitude of the output signal, and the switching of three axes X, Y and Z is realized by adopting serial port communication of a three-axis converter RF Switch and a Helmoltz three-axis coil, so that the calibration accuracy of X, Y and Z in a space is solved; the invention solves the problems of optimization and automatic calculation of the calibration algorithm by adopting a new calibration algorithm and programming by using Labview software.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A calibrating device suitable for car intelligence keyless entry system, its characterized in that includes: the device comprises a baseband signal modulation circuit, a switching circuit and a BCM receiving circuit;
the LF signal modulated by the baseband signal modulation circuit is input to a switching circuit; a switching circuit connected to the coil part;
the coil component is electrically connected with the BCM receiving circuit.
2. The calibration device for the smart keyless entry system of the vehicle according to claim 1, further comprising: a PKE antenna;
and after the modulation signal sent by the coil component is received by the PKE antenna, the modulation signal is communicated with the BCM receiving circuit by the PKE antenna.
3. The calibration device for the smart keyless entry system of the vehicle according to claim 2, further comprising: a Netway component;
and the BCM receiving circuit is connected with the Netway component through CAN communication.
4. The calibration device for the intelligent keyless entry system of the vehicle according to claim 3, wherein the Netway component comprises: a USB interface of a Netwoy component;
the USB interface of the Netway component can collect data;
and finally, the upper computer acquires data through a USB interface of the Netway.
5. The calibration device for the smart keyless entry system of the vehicle according to claim 1, further comprising: a first radio frequency line;
and the LF signal modulated by the baseband signal modulation circuit is input to the switching circuit through a first radio frequency line.
6. The calibration device for the smart keyless entry system of the vehicle according to claim 1, further comprising: a second radio frequency line;
the switching circuit is connected to X, Y, and Z axes of the coil part through a second radio frequency line.
7. The calibration device for the intelligent keyless entry system of the vehicle according to claim 6, wherein the number of the second RF lines is 3.
8. The calibration device for the keyless entry system of vehicle of claim 1 wherein the switching circuit is a three-axis RF switching circuit.
9. The calibration device of claim 1, wherein the coil component is a Helmoltz coil.
10. A calibrating device suitable for car intelligence keyless entry system, its characterized in that includes: the device comprises a baseband signal modulation circuit, a switching circuit and a BCM receiving circuit;
the LF signal modulated by the baseband signal modulation circuit is input to a switching circuit; a switching circuit connected to the coil part;
the coil component is electrically connected with the BCM receiving circuit;
further comprising: a PKE antenna;
after the modulation signal sent by the coil component is received by the PKE antenna, the modulation signal is communicated with the BCM receiving circuit by the PKE antenna;
further comprising: a Netway component;
the BCM receiving circuit is connected with the Netway component through CAN communication;
the Netway component includes: a USB interface of a Netwoy component;
the USB interface of the Netway component can collect data;
finally, the upper computer collects data through a USB interface of the Netwoy;
further comprising: a first radio frequency line;
the LF signal modulated by the baseband signal modulation circuit is input to the switching circuit through a first radio frequency line;
further comprising: a second radio frequency line;
the switching circuit is connected to an X-axis, a Y-axis, and a Z-axis of the coil part through a second radio frequency line;
the number of the second radio frequency lines is 3;
the switching circuit adopts a three-axis RF switching circuit;
the coil component adopts a Helmoltz coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732561.6A CN111865443A (en) | 2020-07-27 | 2020-07-27 | Calibrating device suitable for car intelligence does not have key access system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732561.6A CN111865443A (en) | 2020-07-27 | 2020-07-27 | Calibrating device suitable for car intelligence does not have key access system |
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| CN111865443A true CN111865443A (en) | 2020-10-30 |
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| CN202010732561.6A Pending CN111865443A (en) | 2020-07-27 | 2020-07-27 | Calibrating device suitable for car intelligence does not have key access system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030063012A1 (en) * | 2001-09-28 | 2003-04-03 | Wilhelm Leichtfried | Apparatus and method of calibrating a keyless transmitter |
| CN103280006A (en) * | 2013-04-26 | 2013-09-04 | 上海纳恩汽车技术有限公司 | System and method for detecting intelligent key |
| CN203786797U (en) * | 2013-07-29 | 2014-08-20 | 上海纳恩汽车技术有限公司 | System for verifying smart key position recognition accuracy of PEPS |
| CN104483141A (en) * | 2014-12-29 | 2015-04-01 | 重庆集诚汽车电子有限责任公司 | System and method for wireless communication test of automobile passive entry and passive start system |
| CN104859585A (en) * | 2015-05-20 | 2015-08-26 | 科世达（上海）管理有限公司 | PEPS (passive entry and passive start) technology-based key positioning method and system |
| CN108872727A (en) * | 2017-05-08 | 2018-11-23 | 深圳市新益技术有限公司 | Automobile remote-control key wireless test system and method |
| CN110850183A (en) * | 2019-11-19 | 2020-02-28 | 上海福宇龙汽车科技有限公司 | Self-calibration detection device and method for automobile intelligent key |
-
2020
- 2020-07-27 CN CN202010732561.6A patent/CN111865443A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030063012A1 (en) * | 2001-09-28 | 2003-04-03 | Wilhelm Leichtfried | Apparatus and method of calibrating a keyless transmitter |
| CN103280006A (en) * | 2013-04-26 | 2013-09-04 | 上海纳恩汽车技术有限公司 | System and method for detecting intelligent key |
| CN203786797U (en) * | 2013-07-29 | 2014-08-20 | 上海纳恩汽车技术有限公司 | System for verifying smart key position recognition accuracy of PEPS |
| CN104483141A (en) * | 2014-12-29 | 2015-04-01 | 重庆集诚汽车电子有限责任公司 | System and method for wireless communication test of automobile passive entry and passive start system |
| CN104859585A (en) * | 2015-05-20 | 2015-08-26 | 科世达（上海）管理有限公司 | PEPS (passive entry and passive start) technology-based key positioning method and system |
| CN108872727A (en) * | 2017-05-08 | 2018-11-23 | 深圳市新益技术有限公司 | Automobile remote-control key wireless test system and method |
| CN110850183A (en) * | 2019-11-19 | 2020-02-28 | 上海福宇龙汽车科技有限公司 | Self-calibration detection device and method for automobile intelligent key |
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