CN105243711A - Double-frequency transmitting-receiving device for automobile keyless entry system - Google Patents
Double-frequency transmitting-receiving device for automobile keyless entry system Download PDFInfo
- Publication number
- CN105243711A CN105243711A CN201510661683.XA CN201510661683A CN105243711A CN 105243711 A CN105243711 A CN 105243711A CN 201510661683 A CN201510661683 A CN 201510661683A CN 105243711 A CN105243711 A CN 105243711A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- frequency
- chip
- pin
- nck2983
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 68
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Lock And Its Accessories (AREA)
Abstract
The invention provides a double-frequency transmitting-receiving device for an automobile keyless entry system. The device is arranged between a user identifier (UID) identification equipment module and a body control module (BCM) and comprises a control chip, the control chip is connected to an antenna, a first channel and a second channel are formed on the control chip, and when the current frequency of a high frequency signal which is transmitted by the UID module and is received by the antenna is a first frequency, the control chip receives data transmitted by the UID module through the first channel or when the current frequency of a high frequency signal which is transmitted by the UID module and is received by the antenna is a second frequency, the control chip receives data transmitted by the UID module through the second channel. The device realizes double-frequency transmitting-receiving functions and improves stability and interference resistance of the keyless entry system.
Description
Technical Field
The invention relates to the technical field of automobile keyless entry systems, in particular to a device for realizing double-frequency transceiving in an automobile keyless entry system.
Background
With the rapid development of technology, PKE (keyless entry) technology has been widely applied to various economical automobiles. As shown in fig. 1, a complete PKE system is composed of a PEPS (passive entry & passive start) module, a UID (user identification device) module, an RFA (remote function actuator) module, a door handle, and a BCM (body control module). When the UID module receives a user operation instruction, a high-frequency signal is transmitted to the RFA module, and is forwarded to the BCM through a Local Interconnect Network (LIN) bus for processing, and then the high-frequency signal enters the PEPS module to control the door handle to be opened or closed.
In the prior art, the frequency corresponding to the high-frequency signal sent by the UID module to the RFA module is 433.92MHZ or 314.9MHZ, but the disadvantages are that: and a single frequency is adopted for data transceiving, so that the stability and the anti-interference performance are poor.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a device for implementing dual-frequency transceiving in a keyless entry system of an automobile, which can implement dual-frequency transceiving function and improve stability and anti-interference performance of the keyless entry system.
In order to solve the technical problem, an embodiment of the present invention provides a device for implementing dual-frequency transceiving in a keyless entry system of an automobile, wherein the device is disposed between a UID user identity recognition device module and a BCM body control module, and includes a control chip, the control chip is externally connected with an antenna, and a first channel and a second channel are formed thereon; wherein,
when the current frequency of the high-frequency signal received by the antenna and sent by the UID module is a first frequency, the control chip receives the UID module data by using the first channel; or
And when the current frequency of the high-frequency signal received by the antenna and sent by the UID module is a second frequency, the control chip receives the UID module data by using the second channel.
The control chip adopts an NXP transceiver integrated chip with the model number of NCK 2983; wherein,
pin 5 of the NCK2983 chip is connected with the antenna;
the NCK2983 chip forms a first channel from the internal switch control pin 7 into pin 48 through a first matching network that matches the first frequency; wherein the first matching network comprises a first capacitor C1, a second capacitor C2, and a first inductor L1; one end of the first capacitor C1 is connected with the NCK2983 chip pin 7, and the other end of the first capacitor C1 is connected with one end of the second capacitor C2 and one end of the first inductor L1; the other end of the second capacitor C2 is connected with the NCK2983 chip pin 48; the other end of the first inductor L1 is grounded;
the NCK2983 chip forms a second channel which is formed by an internal switch control pin 3 and enters a pin 1 through a second matching network matched with the second frequency; wherein the second matching network comprises a third capacitor C8, a fourth capacitor C6, a fifth capacitor C7 and a second inductor L2; the third capacitor C8, the fourth capacitor C6 and the fifth capacitor C7 are connected in series to form a loop, and two ends of the loop are respectively connected with pin 3 and pin 1 of the NCK2983 chip; one end of the second inductor L2 is connected to the connection position of the fourth capacitor C6 and the fifth capacitor C7, and the other end is grounded.
A third matching network is arranged between the NCK2983 chip and the antenna; wherein,
the third matching network comprises a sixth capacitor C10, a seventh capacitor C11, an eighth capacitor C9 and a third inductor L3; one end of the sixth capacitor C10 is grounded, and the other end of the sixth capacitor C10 is connected to the antenna and one end of the third inductor L3; the other end of the third inductor L3 is connected to one end of the seventh capacitor C11 and one end of the eighth capacitor C9; the other end of the seventh capacitor C11 is grounded; the other end of the eighth capacitor C9 is connected to pin 5 of the NCK2983 chip.
The NCK2983 chip is further connected with an EEPROM, and the model of the EEPROM is AT24CO 2C.
Wherein the first frequency is 433.92 MHz; the second frequency is 314.9 MHZ.
The embodiment of the invention has the following beneficial effects:
1. in the embodiment of the invention, as the device replaces an RFA module in the prior art, different channels can be selected to receive data sent by the UID module according to the current frequency of a high-frequency signal sent by the UID module, thereby realizing a double-frequency transceiving function and improving the stability and anti-interference performance of a keyless entry system;
2. in the embodiment of the invention, the antenna and the control chip in the device are matched by the third matching network for realizing double frequency point matching, and the first matching network and the second matching network can be realized in the control chip, so that components are saved, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a logical block diagram of a complete PKE system in the prior art;
fig. 2 is a system structure diagram of an apparatus for implementing dual-frequency transceiving in a keyless entry system of an automobile according to an embodiment of the present invention;
fig. 3 is a circuit connection diagram of an apparatus for implementing dual-frequency transceiving in the keyless entry system of the vehicle according to the embodiment of the present invention in fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 2, the device for implementing dual-frequency transceiving in a keyless entry system of an automobile according to an embodiment of the present invention is disposed between a UID module and a BCM, and includes a control chip, wherein the control chip is externally connected to an antenna, and a first channel and a second channel are formed thereon; wherein,
when the current frequency of the high-frequency signal received by the antenna and sent by the UID module is a first frequency, the control chip receives UID module data by using the first channel; or
And when the current frequency of the high-frequency signal received by the antenna and sent by the UID module is the second frequency, the control chip receives the UID module data by using the second channel.
It should be noted that the first frequency is 433.92 MHZ; the second frequency is 314.9 MHZ. The device can ensure that the effective distance reaches 120m under 433.92MHZ and 60m under 314.9MHZ, thereby ensuring the performance of a PKE system and improving the stability and the anti-interference performance of the PKE system.
As shown in fig. 3, the control chip is an NXP transceiver integrated chip with model number NCK 2983; wherein,
pin 5 of the NCK2983 chip is connected with an antenna;
the NCK2983 chip forms a first channel from the internal switch control pin 7 into the pin 48 through a first matching network matched to the first frequency; the first matching network comprises a first capacitor C1, a second capacitor C2 and a first inductor L1; one end of a first capacitor C1 is connected with an NCK2983 chip pin 7, and the other end of the first capacitor C1 is connected with one end of a second capacitor C2 and one end of a first inductor L1; the other end of the second capacitor C2 is connected with the NCK2983 chip pin 48; the other end of the first inductor L1 is grounded;
the NCK2983 chip forms a second channel from the internal switch control pin 3 into pin 1 through a second matching network that matches the second frequency; the second matching network comprises a third capacitor C8, a fourth capacitor C6, a fifth capacitor C7 and a second inductor L2; the third capacitor C8, the fourth capacitor C6 and the fifth capacitor C7 are connected in series to form a loop, and two ends of the loop are respectively connected with pin 3 and pin 1 of the NCK2983 chip; one end of the second inductor L2 is connected to the connection position of the fourth capacitor C6 and the fifth capacitor C7, and the other end is grounded.
It should be noted that the first and second matching networks may be integrated on a circuit board with the NCK2983 chip.
In order to realize the matching of the double frequency points, a broadband matching technology is adopted, so that the matching network can simultaneously meet the requirements of the two frequency bands. A third matching network is arranged between the NCK2983 chip and the antenna; wherein,
the third matching network comprises a sixth capacitor C10, a seventh capacitor C11, an eighth capacitor C9 and a third inductor L3; one end of the sixth capacitor C10 is grounded, and the other end is connected to the antenna and one end of the third inductor L3; the other end of the third inductor L3 is connected to one end of the seventh capacitor C11 and one end of the eighth capacitor C9; the other end of the seventh capacitor C11 is grounded; the other terminal of the eighth capacitor C9 is connected to pin 5 of the NCK2983 chip.
It can be understood that the matching of the double frequency points is realized through the third matching network, components can be saved, and the cost is reduced.
In one embodiment, the NCK2983 chip is further coupled to an EEPROM, which is model number AT24CO 2C.
In another embodiment, the NCK2983 chip is further connected to a LIN transceiver of an integrated regulator and to the BCM via the LIN transceiver of the integrated regulator; the LIN transceiver of the integrated regulator is model number TJA 1028.
In yet another embodiment, the NCK2983 chip is further connected to an AD control module, which is of the type ADC 0809.
The embodiment of the invention has the following beneficial effects:
1. in the embodiment of the invention, as the device replaces an RFA module in the prior art, different channels can be selected to perform data interaction with the UID module according to the current frequency of a high-frequency signal sent by the UID module, so that a double-frequency transceiving function is realized, and the stability and the anti-interference performance of a keyless entry system are improved;
2. in the embodiment of the invention, the antenna and the control chip in the device are matched by the third matching network for realizing double frequency point matching, and the first matching network and the second matching network can be realized in the control chip, so that components are saved, and the cost is reduced.
Those skilled in the art will appreciate that all or part of the steps in the apparatus implementing the above embodiments may be implemented by hardware instructions related to a program, and the program may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (5)
1. A device for realizing double-frequency transceiving in a keyless entry system of an automobile is characterized in that the device is arranged between a UID user identity recognition equipment module and a BCM automobile body control module, and comprises a control chip, wherein the control chip is externally connected with an antenna and is also provided with a first channel and a second channel; wherein,
when the current frequency of the high-frequency signal received by the antenna and sent by the UID module is a first frequency, the control chip receives the UID module data by using the first channel; or
And when the current frequency of the high-frequency signal received by the antenna and sent by the UID module is a second frequency, the control chip receives the UID module data by using the second channel.
2. The device of claim 1, wherein the control chip is an NXP transceiver integrated chip of model number NCK 2983; wherein,
pin 5 of the NCK2983 chip is connected with the antenna;
the NCK2983 chip forms a first channel from the internal switch control pin 7 into pin 48 through a first matching network that matches the first frequency; wherein the first matching network comprises a first capacitor C1, a second capacitor C2, and a first inductor L1; one end of the first capacitor C1 is connected with the NCK2983 chip pin 7, and the other end of the first capacitor C1 is connected with one end of the second capacitor C2 and one end of the first inductor L1; the other end of the second capacitor C2 is connected with the NCK2983 chip pin 48; the other end of the first inductor L1 is grounded;
the NCK2983 chip forms a second channel which is formed by an internal switch control pin 3 and enters a pin 1 through a second matching network matched with the second frequency; wherein the second matching network comprises a third capacitor C8, a fourth capacitor C6, a fifth capacitor C7 and a second inductor L2; the third capacitor C8, the fourth capacitor C6 and the fifth capacitor C7 are connected in series to form a loop, and two ends of the loop are respectively connected with pin 3 and pin 1 of the NCK2983 chip; one end of the second inductor L2 is connected to the connection position of the fourth capacitor C6 and the fifth capacitor C7, and the other end is grounded.
3. The apparatus of claim 2, wherein a third matching network is provided between the NCK2983 chip and the antenna; wherein,
the third matching network comprises a sixth capacitor C10, a seventh capacitor C11, an eighth capacitor C9 and a third inductor L3; one end of the sixth capacitor C10 is grounded, and the other end of the sixth capacitor C10 is connected to the antenna and one end of the third inductor L3; the other end of the third inductor L3 is connected to one end of the seventh capacitor C11 and one end of the eighth capacitor C9; the other end of the seventh capacitor C11 is grounded; the other end of the eighth capacitor C9 is connected to pin 5 of the NCK2983 chip.
4. The apparatus of claim 3 wherein the NCK2983 chip is further connected to an EEPROM, the EEPROM being of the type AT24CO 2C.
5. The apparatus of any one of claims 1 to 4, wherein the first frequency is 433.92 MHz; the second frequency is 314.9 MHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661683.XA CN105243711A (en) | 2015-10-14 | 2015-10-14 | Double-frequency transmitting-receiving device for automobile keyless entry system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661683.XA CN105243711A (en) | 2015-10-14 | 2015-10-14 | Double-frequency transmitting-receiving device for automobile keyless entry system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105243711A true CN105243711A (en) | 2016-01-13 |
Family
ID=55041339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510661683.XA Pending CN105243711A (en) | 2015-10-14 | 2015-10-14 | Double-frequency transmitting-receiving device for automobile keyless entry system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105243711A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107284410A (en) * | 2017-06-14 | 2017-10-24 | 上海实业交通电器有限公司 | The automobile no-key activation system driven based on base station ic |
| CN108649970A (en) * | 2018-07-09 | 2018-10-12 | 上海实业交通电器有限公司 | A kind of automobile key frequency hopping RKE dual-band antennas |
| CN108880596A (en) * | 2018-07-09 | 2018-11-23 | 上海实业交通电器有限公司 | Remote control circuit based on automobile-used RKE double frequency transmitting and independent RFA |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165298A (en) * | 2006-10-17 | 2008-04-23 | 株式会社电装 | Vehicle control system |
| CN101840625A (en) * | 2010-05-05 | 2010-09-22 | 启明信息技术股份有限公司 | Intelligent remote control key entry method and device of automobile |
| CN102594539A (en) * | 2011-01-04 | 2012-07-18 | 上海通用汽车有限公司 | Remote-control keyless entry system for vehicle |
| CN102782730A (en) * | 2010-03-03 | 2012-11-14 | 丰田自动车株式会社 | Wireless communication system and communication method for wireless communication system |
| CN202617109U (en) * | 2012-06-05 | 2012-12-19 | 重庆桴之科科技发展有限公司 | Frequency hopping communication circuit |
| CN203827339U (en) * | 2013-07-01 | 2014-09-10 | 江苏安智欣电子科技有限公司 | Vehicle frequency hopping communication system |
-
2015
- 2015-10-14 CN CN201510661683.XA patent/CN105243711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165298A (en) * | 2006-10-17 | 2008-04-23 | 株式会社电装 | Vehicle control system |
| CN102782730A (en) * | 2010-03-03 | 2012-11-14 | 丰田自动车株式会社 | Wireless communication system and communication method for wireless communication system |
| CN101840625A (en) * | 2010-05-05 | 2010-09-22 | 启明信息技术股份有限公司 | Intelligent remote control key entry method and device of automobile |
| CN102594539A (en) * | 2011-01-04 | 2012-07-18 | 上海通用汽车有限公司 | Remote-control keyless entry system for vehicle |
| CN202617109U (en) * | 2012-06-05 | 2012-12-19 | 重庆桴之科科技发展有限公司 | Frequency hopping communication circuit |
| CN203827339U (en) * | 2013-07-01 | 2014-09-10 | 江苏安智欣电子科技有限公司 | Vehicle frequency hopping communication system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107284410A (en) * | 2017-06-14 | 2017-10-24 | 上海实业交通电器有限公司 | The automobile no-key activation system driven based on base station ic |
| CN107284410B (en) * | 2017-06-14 | 2023-12-08 | 上海实业交通电器有限公司 | Automobile keyless starting system based on base station chip driving |
| CN108649970A (en) * | 2018-07-09 | 2018-10-12 | 上海实业交通电器有限公司 | A kind of automobile key frequency hopping RKE dual-band antennas |
| CN108880596A (en) * | 2018-07-09 | 2018-11-23 | 上海实业交通电器有限公司 | Remote control circuit based on automobile-used RKE double frequency transmitting and independent RFA |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106470040B (en) | Dual band transmitter | |
| DE102014218213B4 (en) | Arrangement and method for detecting the approach of an object | |
| CN105243711A (en) | Double-frequency transmitting-receiving device for automobile keyless entry system | |
| CN106941212B (en) | Antenna assembly and electronic equipment | |
| US10419058B2 (en) | Method for controlling the tuning to a communications frequency of an antenna connected to a component designed for contactless communication and corresponding system | |
| CN108596319A (en) | A kind of RFID electronic label and method for transmitting signals | |
| US20140148097A1 (en) | System for near field communication (nfc) and frequency modulation (fm) communication and portable electronic device using the same | |
| US10037444B1 (en) | Weak RFID tag signal recovery from collisions | |
| CN112736459B (en) | Dual antenna system, radio frequency architecture and electronic device | |
| CN109980759B (en) | Method for managing contactless communication and contactless charging within a system and corresponding system | |
| US9881186B1 (en) | Weak RFID tag signal recovery from collisions | |
| DE102020128300A1 (en) | DEVICE, SYSTEM AND METHOD FOR RADAR DATA COMPRESSION | |
| CN106844275A (en) | Data transmission method and device | |
| EP2606473A1 (en) | Key with radio remote control, particularly for motor vehicles, and arrangement with such a key | |
| US9680443B2 (en) | Apparatus and method for operating at least two antennas for a motor vehicle, and near-field communication network | |
| CN108334826A (en) | The system and method for controlling home electronics based on fingerprint recognition | |
| CN104620256A (en) | Method and circuit for tuning an antenna circuit of an actively transmitting tag | |
| CN110519425A (en) | A kind of antenna assembly of terminal device | |
| CN203630800U (en) | Near-field communication tag equipment | |
| CN207039577U (en) | Possesses the electronic installation of multi-protocol communication pattern | |
| JP6174341B2 (en) | Communication system, tuner, and setting method | |
| CN201918505U (en) | Small-sized multi-frequency internal antenna for mobile terminal | |
| CN201430744Y (en) | Electromagnetic interference eliminating device and electronic equipment | |
| CN104934691A (en) | Reconfigurable portable mobile communication equipment antenna | |
| CN216750296U (en) | Near field communication antenna and near field communication intelligence lock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160113 |