CN102619410A - Intelligent key system and vehicle control method - Google Patents
Intelligent key system and vehicle control method Download PDFInfo
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- CN102619410A CN102619410A CN2011100313394A CN201110031339A CN102619410A CN 102619410 A CN102619410 A CN 102619410A CN 2011100313394 A CN2011100313394 A CN 2011100313394A CN 201110031339 A CN201110031339 A CN 201110031339A CN 102619410 A CN102619410 A CN 102619410A
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Abstract
The invention provides an intelligent key system. The intelligent key system comprises vehicle-mounted base station equipment and a portable sensing remote control device. The portable sensing remote control device comprises a low-frequency receiver, a high-frequency emitter and a microcontroller, wherein the microcontroller is connected with the low-frequency receiver and the high-frequency emitter in a communication way; when receiving a user input, the microcontroller is used for controlling the high-frequency emitter to send a first radio frequency signal; when receiving a radio frequency signal sent by the vehicle-mounted base station equipment, the microcontroller is used for controlling the high-frequency emitter to send a second radio frequency signal; and the emitting power of the first radio frequency signal is higher than that of the second radio frequency signal. According to the other aspect of the invention, the invention also provides a vehicle control method. The intelligent key system can integrate performances, such as the service life of a battery, the remote control distance and the like.
Description
Technical field
The present invention relates to intelligent key system, it comprises cell on wheels equipment and one or more portable induction remote control, can realize one or more controls to vehicle through the wireless telecommunications between cell on wheels equipment and the portable induction remote control.Another aspect of the present invention relates to a kind of control method for vehicle.
Background technology
At present, the technology that adopts of vehicle anti-theft mainly contains three kinds.First kind is the engine anti-theft technology that starts from the beginning of the nineties, and this technology is used the most general the America and Europe, part country even be equipped with engine anti-theft through national legislation mandatory requirement vehicle; Second kind is the remote-control anti-theft technology that starts from the end of the nineties, and this technology can be implemented in tens meters the interior Remote Control Vehicle of scope, and for the user has brought certain convenience, it has long-distance remote control (being RKE:Remote Keyless Entry) function; The third is the intelligent key system that starts from the beginning of this century, and this technology possesses passive type and do not have key and get into function (being PKE:PASSIVE KEYLESS ENTER) not have the key startup with passive type be the PKS function.
RKE mainly realizes through the vehicle remote control technology; Usually operating distance all requires more than 10～15 meters; This technology is the radiofrequency signal of initiatively being launched CF by portable induction remote control to cell on wheels equipment; Radiofrequency signal contains information such as the identification code, random number, straighforward operation of portable induction remote control, and cell on wheels equipment receives and sends to relevant controller after the radiofrequency signal and handle and carry out corresponding operating.
PKE and PKS function scope are usually in 2～3 meters; When portable induction remote control is within cell on wheels equipment short range; If receive the effective instruction that cell on wheels equipment sends; Portable induction remote control just can respond by emitting radio frequency signal, and radiofrequency signal contains the information such as identification code of portable induction remote control, and cell on wheels equipment sends to relevant controller processing and carries out corresponding operation after receiving radiofrequency signal.For example; Chinese invention patent application CN200710123646 discloses a kind of vehicle mounted keyless door guard system; It comprises remote controller and is arranged on the base station unit in the car; Said base station unit comprises low frequencies module, high frequency receiver module and the intelligence control circuit that links to each other with both, is used for receipts/signalling and control car door lock ON/OFF; Said remote controller comprise the low frequency signal that is used to receive the base station unit emission the low frequency receiver module, store the encoder of id information and be used for high-frequency emission module to base station unit emission high-frequency coding signal; Said gate control system also comprises the electric field induction sensor that is installed on the door handle, and the control circuit of said base station unit is communicated by letter with the output of said sensor and linked to each other.
For the RKE function, transmitting power is high more, and the distance that radiofrequency signal transmits is far away more.Yet, for PKE and PKS function, do not have the requirement that remote radiofrequency signal transmits.So, for PKE and PKS function, can design transmitting power low as far as possible, low in energy consumption to guarantee.Therefore, use single power emission signal can't take into account RKE function and PKE or PKS functional requirement.At present, the general transmitting power of a compromise of selecting of the intelligent key system on the market is come emitting radio frequency signal, to possess RKE function and PKE or PKS function simultaneously.Yet the battery of this kind intelligent key system is low application life, and remote control distance is short.
Summary of the invention
The technical problem that the present invention is low for the battery application life that solves the traditional intelligence key system, remote control distance is short provides a kind of intelligent key system, and it can take into account performances such as battery application life, remote control distance simultaneously.
The present invention solves the problems of the technologies described above and adopts following technical scheme.
Intelligent key system; Comprise cell on wheels equipment and portable induction remote control; Said portable induction remote control comprises low frequency receiver, HF transmitter and microcontroller, and said microcontroller is communicated by letter with said HF transmitter with said low frequency receiver and is connected; Said microcontroller is used for controlling said HF transmitter when the user imports and sending first radiofrequency signal receiving; And when receiving the radiofrequency signal of said cell on wheels equipment transmission, control said HF transmitter and send second radiofrequency signal, the transmitting power of said first radiofrequency signal is higher than the transmitting power of said second radiofrequency signal.
As optimal technical scheme of the present invention, in above-mentioned intelligent key system, the frequency of said first radiofrequency signal equals the frequency of said second radiofrequency signal.
As optimal technical scheme of the present invention, in above-mentioned intelligent key system, said cell on wheels equipment comprises low frequencies device, high-frequency receiver and controller, and said controller is communicated by letter with said high-frequency receiver with said low frequencies device and is connected.
As optimal technical scheme of the present invention, in above-mentioned intelligent key system, said portable induction remote control also comprises the user input apparatus that is used to receive user's input and said user's input is sent to said microcontroller.
As optimal technical scheme of the present invention, in above-mentioned intelligent key system, said user input apparatus is a button, and said button comprises following at least one: car button and boot release button are sought in release button, locking button, remote control.
As optimal technical scheme of the present invention, in above-mentioned intelligent key system, said HF transmitter comprises and is used to launch first HF transmitter of first radiofrequency signal and is used to launch second HF transmitter of second radiofrequency signal.
As optimal technical scheme of the present invention, in above-mentioned intelligent key system, the frequency of the frequency of said first radiofrequency signal and said second radiofrequency signal is 315M hertz, 433M hertz, 868M hertz or 915M hertz.
The present invention also provides a kind of control method for vehicle, and this method is realized by above-mentioned intelligent key system, it is characterized in that, may further comprise the steps: whether S1, detection receive user's input, if then get into step S2; If not, then get into step S3; S2, the said HF transmitter of control send first radiofrequency signal; Whether S3, the said low frequency receiver of detection receive the radiofrequency signal that said cell on wheels equipment sends, if then get into step S4; S4, the said HF transmitter of control send second radiofrequency signal.
Compare with traditional intelligent key system, in the intelligent key system of the present invention, said microcontroller is used for controlling said HF transmitter when the user imports and sending first radiofrequency signal receiving; And when receiving the radiofrequency signal of said cell on wheels equipment transmission, control said HF transmitter and send second radiofrequency signal; The transmitting power of said first radiofrequency signal is higher than the transmitting power of said second radiofrequency signal, and in this way, the microcontroller of portable induction remote control sends the radiofrequency signal of different capacity selectively according to functional requirement; The radiofrequency signal that when carrying out the PKE/PKS function, can launch lower power; Thereby the reduction power consumption prolongs battery service time, and when carrying out the RKE function; Can use the radiofrequency signal of higher power, thereby increase remote control distance.Intelligent key system of the present invention can the portable induction remote control of reasonable distribution the transmitting power of HF transmitter, keeping or reducing under the prerequisite of power consumption to increase the RKE communication distance.
In conjunction with the drawings, to the detailed description of specific embodiment of the present invention, can further understand other advantage of the present invention, characteristic and aspect below reading.
Description of drawings
Fig. 1 is the schematic block diagram of intelligent key system according to an embodiment of the invention;
Fig. 2 is the indicative flowchart of control method for vehicle according to an embodiment of the invention;
Fig. 3 is the schematic block diagram of intelligent key system according to another embodiment of the invention.
The specific embodiment
Clearer for technical problem, technical scheme and beneficial effect that the present invention is solved, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Specific embodiments of the invention is elaborated with reference to the accompanying drawings.Among this paper, same reference numerals is represented the same composition part.
According to an aspect of the present invention, intelligent key system mainly comprises: the cell on wheels equipment 102 with low frequencies device 104, controller 106, high-frequency receiver 108; With portable induction remote control 112 with HF transmitter 118, microcontroller 116, low frequency receiver 114.Portable induction remote control 112 can send the high-frequency receiver 108 that high-frequency signal is given cell on wheels equipment 102 through HF transmitter 118.The information such as identification code, random number, straighforward operation that includes the portable remote induction installation in the said high-frequency signal.Cell on wheels equipment 102 can send the low frequency receiver 114 that low frequency signal is given portable induction remote control 112 through low frequencies device 104 conversely.Said low frequency signal also includes information such as the identification code, random number, operational order of cell on wheels equipment 102.
Particularly, intelligent key system comprises cell on wheels equipment 102 and portable induction remote control 112, and wherein, said cell on wheels equipment 102 comprises low frequencies device 104, high-frequency receiver 108 and controller 106.Said controller 106 is connected with said high-frequency receiver 108 communications with said low frequencies device 104, so that said low frequencies device 104 is controlled with said high-frequency receiver 108.
On the other hand, said portable induction remote control 112 comprises low frequency receiver 114, HF transmitter 118, user input apparatus and microcontroller 116.Said user input apparatus is used to receive user's input, and said user's input is sent to said microcontroller 116.In a preferred embodiment of the invention, said user input apparatus is a button.Said button can comprise following at least one: car button and boot release button are sought in release button, locking button, remote control.
Wherein, said microcontroller 116 is communicated by letter with said low frequency receiver 114, said HF transmitter 118 and said user input apparatus and is connected, so that said low frequency receiver 114, said HF transmitter 118 and said user input apparatus are controlled.Said low frequencies device 104 is connected with said low frequency receiver 114 communications, and said low frequency receiver 114 receives the radiofrequency signal that said low frequencies device sends.
Wherein, said HF transmitter 118 is connected with said high-frequency receiver 108 communications; Said high-frequency receiver 108 receives the radiofrequency signal that said HF transmitter 118 sends.
Said microcontroller 116 is used for controlling said HF transmitter 118 when the user imports and sending first radiofrequency signal receiving, and when receiving the radiofrequency signal that said cell on wheels equipment 102 sends, controls said HF transmitter 118 and send second radiofrequency signal.Wherein.The transmitting power of said first radiofrequency signal is higher than the transmitting power of said second radiofrequency signal.Therefore, the transmitting range of said first radiofrequency signal is distal to the transmitting range of said second radiofrequency signal.Wherein, the frequency of said first radiofrequency signal can equate with the frequency of said second radiofrequency signal, for example is 315M hertz, 433M hertz, 868M hertz or 915M hertz.The transmitting power of HF transmitter for example can be controlled through the configuring high-frequency transmitter parameters.
Cell on wheels equipment 102 has constituted the simplest both-way communication with portable induction remote control 112.Can realize two kinds of communication modes through this communication line: first communication mode and second communication mode.Wherein, first communication mode is a high-frequency signal unidirectional emission circuit, and promptly portable induction remote control 112 sends high-frequency signal through HF transmitter 118.Said high-frequency signal is sent to the high-frequency receiver 108 of cell on wheels equipment 102 through electromagnetic field.Second communication mode is that cell on wheels equipment 102 sends low frequency signal through low frequencies device 104 when receiving user's input (for example the user pushes button).Said low frequency signal is sent to the low frequency receiver 114 of portable induction remote control 112 through electromagnetic field.After the said low frequency signal of microcontroller 16 checking low frequency receivers 114 receptions is effective instruction, then send the high-frequency receiver 108 of high-frequency signal to cell on wheels equipment 102 through electromagnetic field through HF transmitter 118.Cell on wheels equipment 102 will send to other electrical module through automobile-used communication network after will handling through the high-frequency signal analysis that high-frequency receiver 108 receives.In addition, the RKE communication just belongs to first communication mode in the intelligent key system, and the PKE/PKS communication just belongs to second communication mode.
Know; Traditionally; Under first communication mode and second communication mode, all high-frequency signal is sent to the high-frequency receiver 108 of cell on wheels equipment 102, realize that promptly the RKE function is identical with the transmitting power of the high-frequency signal of PKE/PKS function with same transmitting power.
Different with it, intelligent key system of the present invention uses the strategy of the high-frequency signal of different capacity to reach the purpose of increase RKE communication distance, reduction PKE/PKS communication power consumption through using to difference in functionality selectively.
The microcontroller 116 of portable induction remote control 112 can be set the transmitting power of different high-frequency signals according to functional requirement.When carrying out the PKE/PKS function, can use lower transmitting power to carry out the emission of PKE/PKS high-frequency signal, and when carrying out the RKE function, can use higher transmitting power to carry out the emission of RKE high-frequency signal.
RKE communication and PKE/PKS communication traditionally all are made as Wt in the power consumption of the single communication of sending high-frequency signal, and the total power consumption that also is both is 2Wt.Through strategy of the present invention, can reduce the power consumption of PKE/PKS communication.The power consumption that reduces is made as △ Wt1, so the power consumption Wt1=Wt-△ Wt1 of PKE/PKS single communication.Wherein, through reducing the transmitting power of PKE/PKS function medium-high frequency signal, reduce power consumption.On the other hand, in the intelligent key system of the present invention, will increase RKE communication transmitting power and increase communication distance, the power consumption that therefore increases is made as △ Wt2, RKE communication single power consumption Wt2=Wt+ △ Wt2 so, and the transmitting power of RKE function medium-high frequency signal increases.Like this, the intelligent key system total power consumption is 2Wt+ △ Wt2-△ Wt1.In intelligent key system of the present invention, through making △ Wt1 >=△ Wt2 guarantees that the power consumption of whole system is constant or reduces, and also promptly prolongs the application life of battery 124.And the RKE communication power consumption △ Wt2 that increases can increase the distance that RKE communication medium-high frequency signal transmits.Therefore pass through the strategy of intelligent key system of the present invention; Can be according to first communication mode of portable induction remote control 112 and second communication mode different; Utilize two distinct transmit power respectively, the purpose that realizes increasing the RKE communication distance and keep or reduce the intelligent key system power consumption.
In addition, according to following formula, can draw the relation of transmitting power and remote control distance: formula 1:FL (dBm)=20 lg D (km)+20 lg f (MHz)+32.44; Formula 2:FL (dBm)=Pt (dBm)+X; Formula 3:Pt (dBm)=10lg (mw), wherein, D representes the distance that radiofrequency signal transmits; F representes frequency; FL representes free space loss; Pt (dBm) expression transmitter intensity; X representes the parameter that other and transmitter have nothing to do.
According to an application example of the present invention, can be at the average power consumption that guarantees the low intelligent key system of remote control distance situation decline.For example; The power consumption of RKE communication in the prior art and PKE communication is made as 9.6 mA, and its transmitting range is made as 30m, through reducing the transmitting power in the PKE communication; The power consumption of PKE communication is reduced to about 2.4mA, and the transmitting range that can draw the radiofrequency signal of PKE communication this moment is about 15m.Can find out, can under the situation of the transmitting range (30m) of the radiofrequency signal that guarantees the RKE communication, reduce the average power consumption of intelligent key system.
Application example can guarantee that the average power consumption at intelligent key system does not increase or only increase the distance that increases the RKE communication under the situation seldom according to another preferred.For example; The power consumption of RKE communication in the prior art and PKE communication is made as 9.6mA, and its transmitting range is made as 30m, the transmitting power during through increase RKE communication; The distance of RKE communication is increased to 60m; And the power when reducing the PKE communication is 1.2mA, and the distance of PKE communication is reduced to 7.5m and can satisfies functional requirement so, and average power consumption is 19.8mA.And if the use conventional art will make the RKE communication distance increase to 60m, average power consumption is 38.4mA.One of ordinary skill in the art will readily recognize that in above-mentioned application examples, directly use mA to represent the power consumption of weak electrical appliance.
The transmitting power of the present invention through the portable induction remote control 112 of reasonable distribution can keep or reduce under the prerequisite of system to increase the RKE communication distance.For example, in instance, can the transmitting power of the radiofrequency signal in the different communication modes is arranged to differ more than 2 times, the distance that corresponding high-power radiofrequency signal transmits can increase more than 1 times, and the power consumption of low-power radio frequency signal can reduce more than 2 times.
In another preferred embodiment of the present invention, intelligent key system comprises cell on wheels equipment 102 and portable induction remote control 112, and wherein, said cell on wheels equipment 102 comprises low frequencies device 104, high-frequency receiver 108 and controller 106.Said controller 106 is connected with said high-frequency receiver 108 communications with said low frequencies device 104, so that said low frequencies device 104 is controlled with said high-frequency receiver 108.Said portable induction remote control 112 comprises low frequency receiver 114, HF transmitter 118, user input apparatus and microcontroller 116.Wherein, in this enforcement, said HF transmitter 118 comprises and is used to launch first HF transmitter 120 of first radiofrequency signal and be used to launch second HF transmitter 122 of second radiofrequency signal.First HF transmitter 120 and second HF transmitter 122 can be separate hardware.Wherein, Said microcontroller 116 and said low frequency receiver 114, first HF transmitter 120, second HF transmitter 122 and said user input apparatus are communicated by letter and are connected, so that said low frequency receiver 114, first HF transmitter 120 and second HF transmitter 122 and said user input apparatus are controlled.Said low frequencies device 104 is connected with said low frequency receiver 114 communications, and said low frequency receiver 114 receives the radiofrequency signal that said low frequencies device sends.
Wherein, first HF transmitter 120 all is connected with said high-frequency receiver 108 communications with second HF transmitter 122; Said high-frequency receiver 108 receives the radiofrequency signal of first HF transmitter 120 and 122 transmissions of second HF transmitter.
According to a further aspect in the invention, a kind of control method for vehicle is provided.This vehicle comprises above-mentioned intelligent key system.Wherein, said control method for vehicle may further comprise the steps: S0, program begin; Whether S1, detection receive user's input, if then get into step S2; If not, then get into step S3; S2, the said HF transmitter of control send first radiofrequency signal; Whether S3, the said low frequency receiver of detection receive the radiofrequency signal that said cell on wheels equipment sends, if then get into step S4; S4, the said HF transmitter of control send second radiofrequency signal; After accomplishing, step S2 and step S4 get into step S5.In step S5, EP (end of program).Can be step S0 after the step S5.
The present invention under the prerequisite in the normal application life that guarantees battery 124, can increase the remote control distance of distant control function through using the strategy that can select two kinds of distinct transmit patterns to difference in functionality, also reduces no key entering and does not have the power consumption that key starts.
Intelligent key system of the present invention is based on following principle: the performance indications of the RKE communication of long-distance remote control are distances, and that PKE and PKS adjust the distance is less demanding.Yet, because portable induction remote control 112 is to supply power through battery 124 power supplys such as grade, so require the low in energy consumption of intelligent key system.Usually, the distance of radiofrequency signal transmission is proportional with the power of transmitter.This means that the distance that will transmit is far away more, just require the power of transmitter high more, on the contrary low more.The power and the power consumption of transmitter are proportional.Therefore, the distance of transmission is far away more, and the power consumption of transmitter is big more, otherwise more little.
Intelligent key system of the present invention is through sending the radiofrequency signal of two different capacities, the problem of the high-frequency signal sending power consumption of high-frequency signal transmission range, PKS and the PKE communication of solution RKE communication.Intelligent key system of the present invention is particularly useful for VATS Vehicle Anti-Theft System that comprises two-way communication etc.Compare with traditional intelligent key system; Intelligent key system of the present invention comprises cell on wheels equipment 102 and portable induction remote control 112; Said portable induction remote control 112 comprises low frequency receiver 114, HF transmitter 118, button 126 and microcontroller 116; Said microcontroller 116 is controlled said HF transmitter 118 and is sent first radiofrequency signal when said button 126 is pressed, and said microcontroller 116 controls said HF transmitter 118 and send second radiofrequency signal when said low frequency receiver 114 receives the radiofrequency signal that said low frequencies device 104 sends, and the power of said first radiofrequency signal is higher than the power of said second radiofrequency signal; By this way; The radiofrequency signal that the microcontroller 116 of portable induction remote control 112 sends different capacity according to functional requirement can be used the radiofrequency signal of lower-wattage when carrying out the PKE/PKS function, thereby reduces power consumption; Prolong the service time of battery 124; And when carrying out the RKE function, can use the radiofrequency signal of higher-wattage, thereby increase remote control distance.Intelligent key system of the present invention can the portable induction remote control 112 of reasonable distribution the transmitting power of HF transmitter 118, keeping or reducing under the prerequisite of power consumption to increase the RKE communication distance.
Those skilled in the art know easily; The above is merely preferred embodiment of the present invention; Not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.Protection scope of the present invention is confirmed by claims.
Claims (8)
1. intelligent key system; Comprise cell on wheels equipment and portable induction remote control; It is characterized in that said portable induction remote control comprises low frequency receiver, HF transmitter and microcontroller, said microcontroller is communicated by letter with said HF transmitter with said low frequency receiver and is connected; Said microcontroller is used for controlling said HF transmitter when the user imports and sending first radiofrequency signal receiving; And when receiving the radiofrequency signal of said cell on wheels equipment transmission, control said HF transmitter and send second radiofrequency signal, the transmitting power of said first radiofrequency signal is higher than the transmitting power of said second radiofrequency signal.
2. intelligent key system according to claim 1 is characterized in that the frequency of said first radiofrequency signal equals the frequency of said second radiofrequency signal.
3. intelligent key system according to claim 1 is characterized in that, said cell on wheels equipment comprises low frequencies device, high-frequency receiver and controller, and said controller is communicated by letter with said high-frequency receiver with said low frequencies device and is connected.
4. intelligent key system according to claim 1 is characterized in that, said portable induction remote control also comprises the user input apparatus that is used to receive user's input and said user's input is sent to said microcontroller.
5. intelligent key system according to claim 4 is characterized in that, said user input apparatus is a button, and said button comprises following at least one: car button and boot release button are sought in release button, locking button, remote control.
6. according to each described intelligent key system of claim 1 ~ 5, it is characterized in that said HF transmitter comprises and is used to launch first HF transmitter of said first radiofrequency signal and is used to launch second HF transmitter of said second radiofrequency signal.
7. according to each described intelligent key system of claim 1 ~ 5, it is characterized in that the frequency of the frequency of said first radiofrequency signal and said second radiofrequency signal is 315M hertz, 433M hertz, 868M hertz or 915M hertz.
8. control method for vehicle, this method are realized by the described intelligent key system of claim 1, it is characterized in that, may further comprise the steps: S1, detect whether receive user's input, if then get into step S2; If not, then get into step S3; S2, the said HF transmitter of control send first radiofrequency signal; Whether S3, the said low frequency receiver of detection receive the radiofrequency signal that said cell on wheels equipment sends, if then get into step S4; S4, the said HF transmitter of control send second radiofrequency signal.
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Application publication date: 20120801 |