CN102739284A - Vehicle lock remote control implementation method - Google Patents
Vehicle lock remote control implementation method Download PDFInfo
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- CN102739284A CN102739284A CN201210204049XA CN201210204049A CN102739284A CN 102739284 A CN102739284 A CN 102739284A CN 201210204049X A CN201210204049X A CN 201210204049XA CN 201210204049 A CN201210204049 A CN 201210204049A CN 102739284 A CN102739284 A CN 102739284A
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Abstract
The invention discloses a vehicle lock remote control implementation method. A remote control receiving module and a remote control transmitting module respectively have at least three frequency points, the first frequency point is a defaulted working frequency point, and the first frequency point, the second frequency point and the third frequency point are arranged in a descending order of priority; when the remote control transmitting module has key input, a remote control transmitting module micro control unit (MCU) is activated to determine the signal strength of the current defaulted working frequency point which is received by a radio frequency (RF) network; when the signal strength is more than -80 dBm, the frequency is hopped to the frequency point of the subsequent priority, and when the signal strength is less than -80 dBm, the current working frequency point is used; the remote control receiving module is in a polling working mode, a polling period has a preset value, a remote control receiving module MCU enters the working state according to the polling period and then determines the signal strength of the current defaulted working frequency point; and if the signal strength is more than -80 dBm, the frequency is hopped to the frequency point of the subsequent priority.
Description
Technical field
The invention belongs to automobile remote-control lock technology field, particularly a kind of lock remote control implementation method.
Background technology
Remote controller for vehicle (Remote Key Entry is called for short RKE) is commonly used to the central controlled lock of automobile is carried out remote control.When using onboard remote controller usually because the interference of ambient signals causes the temporary transient malfunctioning phenomenon of remote controller; This phenomenon is because the frequency of the wireless signal channel that remote controller uses is disturbed by external interference source; And common remote controller can't be adjusted working frequency points according to the frequency of interference signal on every side, causes the malfunctioning phenomenon of remote controller.
The hardware technology scheme of concrete analysis RKE generally has two big types: SAW resolution element scheme and single chip solution.
SAW resolution element scheme is formed high frequency transmission circuit by SAW filter and transistor, and MCU accomplishes and encrypts and handle input signal.The shortcoming of this remote controller is the higher system cost that a large amount of RF assemblies are brought, and also has following shortcoming based on the reflector of SAW: the carrier frequency precision is low, single frequency operation, only support that OOK modulation, stability are poor, responsive to the device tolerance, yield poorly.
Along with the output of remote controller and the requirement of antijamming capability are improved, special-purpose RF radio-frequency transmissions chip has appearred, directly directly is integrated in the RF radio frequency chip in the MCU in addition.The increasing remote control scheme that is applied to this single-chip in the telecontrol engineering in future.The remote control scheme technology of single-chip is relatively ripe, but the interference rejection ability of remote controller is very low, and there is certain limitation in the sensitivity of the efficient of transmitter module and receiver module.
Summary of the invention
The purpose of this invention is to provide a kind of lock remote control implementation method, to solve the problem that the remote controller for vehicle system is disturbed easily in the prior art.
Technical scheme of the present invention is, a kind of lock remote control implementation method is carried out remote control through remote control receiver module and remote-control transmitting module to lock, and the remote control receiver module is through wireless mode and the communication of remote control receiver module,
The remote-control transmitting module has RF antenna, RF matching network, RF and launches modulation circuit, remote-control transmitting module MCU and switch input circuit,
The remote control receiver module has the RF reception antenna, RF receives matching network, RF demodulator circuit, remote control receiver module MCU and output interface,
The RF antenna of remote-control transmitting module is made up of built-in PCB antenna; The RF matching network is made up of electric capacity, inductance network; After remote-control transmitting module MCU accomplishes the processing to the input of switch input circuit, encrypt and 32 rolling code anti-theft technical finesse, through RF emission modulation circuit signal is carried out FSK then and modulate through AES; Launch through RF matching network and RF antenna at last
What the remote control receiver module was accomplished is the inverse process of remote-control transmitting module; Receive matching network by RF reception antenna and RF and accomplish reception wireless signal; Separate the mediation Filtering Processing by the RF demodulator circuit then; Accomplish the AES deciphering by remote control receiver module MCU and handle, calculate the specific instructions rear drive output interface that the remote-control transmitting module is launched with 32 rolling code
Remote control receiver module and remote-control transmitting module have at least 3 frequencies; Be respectively first frequency, second frequency and the 3rd frequency; First frequency is arranged as first frequency, second frequency and the 3rd frequency for the acquiescence working frequency points according to priority from high to low, specifically may further comprise the steps:
When the remote-control transmitting module has the button input; At first activate remote-control transmitting module MCU; Remote-control transmitting module MCU judges the signal strength signal intensity of the current acquiescence working frequency points of receiving on the RF network; When be higher than-80dBm, is lower than to the frequency of next priority with regard to frequency hopping-80dBm just uses current working frequency points;
The remote control receiver module is in the poll mode of operation; Polling cycle is a preset definite value, and remote control receiver module MCU gets into operating state according to polling cycle, and it is the operating time that this operating state keeps duration; Judge the signal strength signal intensity of current acquiescence working frequency points after the remote control receiver module MCU entering operating state; If greater than-80dBm, just jump to the working frequency points of next priority, less than-80dBm just in current working frequency.
Preferably, described first frequency, second frequency and the 3rd frequency are respectively 433.82MHz, 433.92MHz, 434.02MHz.
Preferably, described polling cycle is 40ms, and the described operating time is 4ms.
Preferably; When the remote control receiver module is received carrier signal, remote control receiver module MCU seeks the guidance code of Frame, finds frame head according to guidance code; Isolate enciphered data according to guidance code and frame head, obtain the instruction of remote-control transmitting module then through AES deciphering and rolling code algorithm process.
Preferably,
After the instruction of remote-control transmitting resume module input, director data is packaged as 1 frame data bag, sends data according to the mode of once sending the identical packet of 2 frames.
Preferably,
When the remote control receiver module is received carrier signal, remote control receiver module MCU seeks the guidance code of Frame, and this guidance code is 0X00 and 0X01; Find frame head then; Frame head is 0XAA, and removing behind the frame head is exactly 128 bit strip ciphered data signals, the specific instructions that obtains launching through AES deciphering and rolling code algorithm process then; The data of the each emission of remote-control transmitting module have 2 frames, and the assurance receiver module is received 1 complete Frame at least in polling cycle.
Lock remote control system of the present invention adopts frequency hopping, according to surrounding environment disturbed condition adjustment working frequency points, reaches anti-jamming capacity.The present invention has carried out integrated optimization at the aspects such as modulation-demodulation technique, encryption and decryption mode and rolling code technology of antijamming capability, module efficiency and the sensitivity of frequency hopping to existing lock remote control system.
Description of drawings
Fig. 1 is that system of the present invention forms schematic diagram.
The encryption flow figure of Fig. 2 remote-control transmitting of the present invention.
The master data frame of Fig. 3 remote control system of the present invention.
Fig. 4 three frequency hopping frequencies of the present invention distribute.
Embodiment
As shown in Figure 1; Lock remote control system based on frequency hopping of the present invention; This lock remote control system comprises remote control receiver module and remote-control transmitting module; The remote control receiver module is through wireless mode and the communication of remote control receiver module, and there is the RF antenna remote control receiver module inside, RF matching network, RF modulation circuit, MCU, switch input circuit etc.; There is the RF reception antenna remote control receiver module inside, and RF receives matching network, MCU, output interface.Wherein, remote controller sends to the remote control receiver module by the mode of coded program through FSK, wherein encrypts and 32 rolling code encryptions, decryption technology through 128 AES, and the basic procedure of AES is as shown in Figure 2.
The remote-control transmitting module is passed through MCU through the input command button; Through encrypting and modulating and launch through RF matching network and antenna with certain Frame; The remote control receiver module receives matching network through reception antenna and RF; Come out decrypted signal through demodulation is close, export to interface circuit.The data frame structure that sends is as shown in Figure 3.
The remote-control transmitting module antenna is made up of built-in PCB antenna; The RF matching network is made up of electric capacity, inductance network; After MCU accomplishes the processing to the switching circuit input command; Encrypt and 32 rolling code anti-theft technical finesse through AES, through RF emission modulation circuit signal is carried out FSK then and modulate, launch through RF matching network and antenna at last; What the remote control receiver module was accomplished is the inverse process of remote-control transmitting module; Accomplish reception by antenna and matching network to wireless signal; The RF demodulator circuit is separated processing such as mediation filtering again then; Accomplish the AES deciphering by MCU then and handle, calculate the specific instructions rear drive output interface that the remote-control transmitting module is launched with 32 rolling code.This remote controller has three frequency 433.82MHz, 433.92MHz, 434.02MHz.When remote control module detects current acquiescence frequency 433.92MHz interference is arranged, will jump automatically 100KHz to the work of 434.02MHz frequency.
When remote-control transmitting module one side has the button input command; At first activate MCU; MCU judges the signal strength signal intensity of the current acquiescence working frequency points of receiving on the RF network, when be higher than-80dBm is with regard to the frequency of frequency hopping to next priority, be lower than-80dBm just uses current working frequency points; Handle input order signal then.An order is sent according to two frame data, the form of transmission such as Fig. 3.Receiver module is in the poll mode of operation, and polling cycle is 40ms, MCU work 4ms in the 40ms, MCU judges the signal strength signal intensity of current acquiescence working frequency points in 4ms, greater than-80dBm, just jumps to next working frequency points, less than-80dBm just in current working frequency; When having received carrier signal; MCU will look for the guidance code of frame signal; Describe among the pattern of the input of guidance code such as Fig. 3, just think that when finding 0X00 and 0X01 guidance code finishes, and finds the frame head of 0XAA then; Removing behind the frame head is exactly 128 bit strip ciphered data signals, the specific instructions that obtains launching through AES deciphering and rolling code algorithm process then.The data of the each emission of transmitter module have 2 frames, and the assurance receiver module is received 1 complete data-signal at least in the polling cycle of 40ms.
| Frequency | Priority | Bandwidth |
| 433.82MHz | III | 200K |
| 433.92MHz | I | 200K |
| 434.02MHz | II | 200K |
The remote-control transmitting module carries out the AES encryption to the signal of button with MCU and rolling code is handled, and carries out carrier modulation through the RF modulation circuit then, preferably goes out with the wireless signal transmission of certain frequency through RF matching network and antenna; The remote control receiver module receives wireless signal through antenna and the wireless matching network of RF, through the RF demodulator circuit signal is carried out demodulation then; Accomplish AES deciphering and rolling code technical finesse by MCU then; Last driving interface circuit when acquiescence frequency 433.92MHz is interfered, transmits and receives and can jump the frequency work of the bandwidth of 100KHz to 434.02MHz automatically; Wherein
The MCU of remote-control transmitting module carries out AES encryption and 32 rolling code technical finesses of 128 to push button signalling, and 128 AES level of encryptions are the strictest current cipher modes, and 32 rolling code technology is the longest at present a kind of rolling code algorithm; The RF modulation circuit is accomplished the carrier modulation of signal FSK mode, RF pair net and transmitting antenna, and emission under the power of 10dBm, the standing-wave ratio of network 1.8 at 1 meter absolutely empty coupled power is-30dBm.
The remote control receiver module is accomplished the reception to wireless signal through reception antenna and RF matching network; Receiving sensitivity is at-110dBm; The RF demodulator circuit accomplish to signal separate the mediation Filtering Processing, MCU accomplishes 128 AES signal is deciphered and 32 rolling code technical finesse.
Beneficial effect of the present invention is: the wireless transmitter module technology that the present invention adopts has frequency hopping, energy-saving mode; The quiescent dissipation of whole remote-control transmitting module is less than 0.8uA; Less than 10mA, with 2032 batteries of 650mAh, can work 3 years every day under 25 times under the mode of operation.The remote control receiver module has more-sensitivity of 110dBm, adopt poll pattern work, and duty ratio is 1/10, the averaged static power consumption is less than 1mA, is superior at present remote control receiver module performance on the market greatly.In practical application, test and not with the remote controller contrast of frequency hopping, this remote controller has very big advantage with the interference source of certain frequency.
Claims (6)
1. a lock remote control implementation method is carried out remote control through remote control receiver module and remote-control transmitting module to lock, and the remote control receiver module passes through wireless mode and the communication of remote control receiver module,
The remote-control transmitting module has RF antenna, RF matching network, RF and launches modulation circuit, remote-control transmitting module MCU and switch input circuit,
The remote control receiver module has the RF reception antenna, RF receives matching network, RF demodulator circuit, remote control receiver module MCU and output interface,
The RF antenna of remote-control transmitting module is made up of built-in PCB antenna; The RF matching network is made up of electric capacity, inductance network; After remote-control transmitting module MCU accomplishes the processing to the input of switch input circuit, encrypt and 32 rolling code anti-theft technical finesse, through RF emission modulation circuit signal is carried out FSK then and modulate through AES; Launch through RF matching network and RF antenna at last
What the remote control receiver module was accomplished is the inverse process of remote-control transmitting module; Receive matching network by RF reception antenna and RF and accomplish reception wireless signal; Separate the mediation Filtering Processing by the RF demodulator circuit then; Accomplish the AES deciphering by remote control receiver module MCU and handle, calculate the specific instructions rear drive output interface that the remote-control transmitting module is launched with 32 rolling code
It is characterized in that; Remote control receiver module and remote-control transmitting module have at least 3 frequencies; Be respectively first frequency, second frequency and the 3rd frequency; First frequency is arranged as first frequency, second frequency and the 3rd frequency for the acquiescence working frequency points according to priority from high to low, specifically may further comprise the steps:
When the remote-control transmitting module has the button input; At first activate remote-control transmitting module MCU; Remote-control transmitting module MCU judges the signal strength signal intensity of the current acquiescence working frequency points of receiving on the RF network; When be higher than-80dBm, is lower than to the frequency of next priority with regard to frequency hopping-80dBm just uses current working frequency points;
The remote control receiver module is in the poll mode of operation; Polling cycle is a preset definite value, and remote control receiver module MCU gets into operating state according to polling cycle, and it is the operating time that this operating state keeps duration; Judge the signal strength signal intensity of current acquiescence working frequency points after the remote control receiver module MCU entering operating state; If greater than-80dBm, just jump to the working frequency points of next priority, less than-80dBm just in current working frequency.
2. lock remote control implementation method as claimed in claim 1 is characterized in that described first frequency, second frequency and the 3rd frequency are respectively 433.82MHz, 433.92MHz, 434.02MHz.
3. lock remote control implementation method as claimed in claim 1 is characterized in that described polling cycle is 40ms, and the described operating time is 4ms.
4. lock remote control implementation method as claimed in claim 1 is characterized in that,
When the remote control receiver module is received carrier signal; Remote control receiver module MCU seeks the guidance code of Frame; Find frame head according to guidance code, isolate enciphered data, obtain the instruction of remote-control transmitting module then through AES deciphering and rolling code algorithm process according to guidance code and frame head.
5. lock remote control implementation method as claimed in claim 1 is characterized in that,
After the instruction of remote-control transmitting resume module input, director data is packaged as 1 frame data bag, sends data according to the mode of once sending the identical packet of 2 frames.
6. lock remote control implementation method as claimed in claim 4 is characterized in that,
When the remote control receiver module is received carrier signal, remote control receiver module MCU seeks the guidance code of Frame, and this guidance code is 0X00 and 0X01; Find frame head then; Frame head is 0XAA, and removing behind the frame head is exactly 128 bit strip ciphered data signals, the specific instructions that obtains launching through AES deciphering and rolling code algorithm process then; The data of the each emission of remote-control transmitting module have 2 frames, and the assurance receiver module is received 1 complete Frame at least in polling cycle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210204049.XA CN102739284B (en) | 2012-06-19 | 2012-06-19 | A kind of vehicle lock remote control implementation |
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| CN201210204049.XA CN102739284B (en) | 2012-06-19 | 2012-06-19 | A kind of vehicle lock remote control implementation |
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| CN102739284B CN102739284B (en) | 2015-09-23 |
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| CN103888156A (en) * | 2014-04-10 | 2014-06-25 | 珠海格力电器股份有限公司 | Remote controller radio-frequency signal sending method and system |
| CN105830129A (en) * | 2015-04-29 | 2016-08-03 | 深圳市大疆创新科技有限公司 | Cradle control method, apparatus and system |
| CN105989700A (en) * | 2015-01-27 | 2016-10-05 | 南京军理科技股份有限公司 | Multi-zone multi-frequency-point wireless single-direction remote control system |
| CN106411342A (en) * | 2016-11-17 | 2017-02-15 | 合肥晟泰克汽车电子有限公司 | Vehicle-used sweep frequency receiving device and control method thereof |
| CN108407736A (en) * | 2018-03-05 | 2018-08-17 | 奇瑞汽车股份有限公司 | A kind of control method and system of the communication of generalization automobile remote-control |
| CN111121988A (en) * | 2019-12-30 | 2020-05-08 | 中国船舶重工集团公司第七一一研究所 | Temperature measuring device and temperature measuring method suitable for V-shaped engine connecting rod bearing bush |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103888156A (en) * | 2014-04-10 | 2014-06-25 | 珠海格力电器股份有限公司 | Remote controller radio-frequency signal sending method and system |
| CN105989700A (en) * | 2015-01-27 | 2016-10-05 | 南京军理科技股份有限公司 | Multi-zone multi-frequency-point wireless single-direction remote control system |
| CN105830129A (en) * | 2015-04-29 | 2016-08-03 | 深圳市大疆创新科技有限公司 | Cradle control method, apparatus and system |
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| CN106411342A (en) * | 2016-11-17 | 2017-02-15 | 合肥晟泰克汽车电子有限公司 | Vehicle-used sweep frequency receiving device and control method thereof |
| CN108407736A (en) * | 2018-03-05 | 2018-08-17 | 奇瑞汽车股份有限公司 | A kind of control method and system of the communication of generalization automobile remote-control |
| CN108407736B (en) * | 2018-03-05 | 2019-12-10 | 奇瑞汽车股份有限公司 | Control method and system for universal automobile remote control communication |
| CN111121988A (en) * | 2019-12-30 | 2020-05-08 | 中国船舶重工集团公司第七一一研究所 | Temperature measuring device and temperature measuring method suitable for V-shaped engine connecting rod bearing bush |
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| CN102739284B (en) | 2015-09-23 |
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