CN103174336A - Electronic key system of vehicle - Google Patents
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- CN103174336A CN103174336A CN2012105682879A CN201210568287A CN103174336A CN 103174336 A CN103174336 A CN 103174336A CN 2012105682879 A CN2012105682879 A CN 2012105682879A CN 201210568287 A CN201210568287 A CN 201210568287A CN 103174336 A CN103174336 A CN 103174336A
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Abstract
The invention provides an electronic key system of vehicles, wherein wrong actions are inhibated in an environment with noise peaks. According to the electronic key system, portable equipment is positioned in the communication area of vehicle equipment, wireless communication is provided between vehicle equipment and portable equipment, portable equipment receives a wakeup signal from the vehicle equipment and measures the RSSI value, the reponsive signal containing the measurement result is sent to the vehicle equipment, the vehicle equipment determines the position of the portable equipment in the communication area according to the RSSI value in the responsive signal, and vehicle control corresponding to the determination result is carried out. Portable equipment provides three times of detection to the RSSI value of the wakeup signal. In addition, the vehicle equipment determines the position of the portable equipment according to the mean value of two RSSI values in the three detected RSSI values except the largest one.
Description
Technical field
The present invention relates to a kind of electron key system that carries out the various controls of vehicle by the radio communication between vehicle and electron key.
Background technology
The door handle that the user that what is called carries portable equipment (electron key) touches vehicle comes solution to lock door, and user's push is arranged on tail-off on instrument board (dashboard), and to come the electron key system of ato unit be well-known.In the past, as such electron key system, the known system that 1 record of patent documentation is for example arranged.
In the electron key system of this patent documentation 1 record, be provided with a plurality of transmitters, these transmitters are used for wireless signal is sent to respectively being arranged on a plurality of communication zones that car is outdoor and car is indoor.Then, user one touches the door handle of vehicle, just sends respectively the 1st wireless signal from each transmitter.Then, these the 1st wireless signals one are received by the entrained portable equipment of user, portable equipment is measured with regard to the value to the received signal strength (RSSI) of the 1st wireless signal that sends out from each transmitter respectively, and sends the measurement result that comprises RSSI value separately and the cognizance code of self at the 2nd interior wireless signal.Then, the 2nd wireless signal that sends out from portable equipment is received by mobile unit via being equipped on the receiver on vehicle.Mobile unit one receives the 2nd wireless signal by this way, just to the cognizance code of portable equipment contained in the 2nd wireless signal and in be located at cognizance code contained in the memory of mobile unit and carry out verification, thus portable equipment is authenticated.In addition, judge the position of portable equipment according to each RSSI value contained in the 2nd wireless signal.Then, in the situation that be judged as the authentication establishment of portable equipment and the periphery that portable equipment is positioned at car door, with the car door release.
Based on such formation, due to the position that can judge accurately portable equipment, so can more suitably carry out controlling with corresponding (in other words, corresponding with user's the position) vehicle in the position of portable equipment.Therefore, can improve the reliability of electron key system.
Patent documentation 1: TOHKEMY 2006-348497 communique
Yet, in the electron key system of such vehicle, if sneak into noisy words the 1st wireless signal that the transmitter from vehicle sends out, portable equipment will occur and the RSSI value of the 1st wireless signal not measured, and the problem that the RSSI value of noise is measured.In addition, as the noise of sneaking in the 1st wireless signal, can enumerate such as carry the noise that generation time is extremely short and intensity is large that sends at the spark plug on vehicle (spark plug) or wiper drive motor etc., so-called spike noise (spike noise) etc. when it drives.Then, because if portable equipment is measured the RSSI value of this spike noise, the RSSI value of spike noise will be comprised in from the 2nd wireless signal that portable equipment sends out, so can cause mobile unit to judge according to the RSSI value of the spike noise position to portable equipment.Due in this case, be difficult to the position of portable equipment is suitably judged, thus be easy to bring impact to the action of the electron key system of vehicle, such as carrying out with the corresponding suitable vehicle control in position of portable equipment etc.
Summary of the invention
The present invention proposes for above-mentioned situation just, and its purpose is to provide a kind of electron key system of vehicle, even this electron key system has in generation under the environment of spike noise, also can suppress malfunction.
In order to solve above-mentioned problem, the 1st aspect of the present invention provides a kind of electron key system of vehicle.the electron key system of this vehicle, be positioned at the communication zone of the mobile unit of lift-launch on vehicle as condition take portable equipment, carry out radio communication between described mobile unit and described portable equipment, described portable equipment is measured the received signal strength of the 1st wireless signal when receiving the 1st wireless signal that sends from described mobile unit, and the 2nd wireless signal that will comprise this measurement result is sent to described mobile unit, described mobile unit judges the position of described portable equipment in described communication zone according to the measurement result of described received signal strength contained in described the 2nd wireless signal, and carry out the corresponding vehicle control of judged result therewith, the electron key system of described vehicle is characterised in that, described portable equipment is repeatedly measured the received signal strength of described the 1st wireless signal, described mobile unit is according to the measurement result of removing predetermined number from the measurement result of intensity maximum from a plurality of measurement results of the received signal strength measured by described portable equipment and remaining measurement result, judge the position of described portable equipment.
Be generally the noise of single-shot due to spike noise, thus be subject to this influence of noise be the sub-fraction of whole wireless signal.Therefore, as above-mentioned formation, if by portable equipment, the received signal strength of the 1st wireless signal that sends out from mobile unit is repeatedly measured, even sneaked into spike noise in the 1st wireless signal, a plurality of measurement results also seldom can all be subject to the impact of spike noise, and any measurement result in these measurement results can be subject to the impact of spike noise usually.So, in mobile unit, due to according to removing the measurement result of predetermined number from the measurement result of intensity maximum and remaining measurement result judges the position of portable equipment from these a plurality of measurement results, so can be according to being subjected to spike noise to affect the position that less measurement result judges portable equipment.Thus, owing to can be more accurately the position of portable equipment being judged, so can suppress the malfunction of electron key system.
The 2nd aspect of the present invention, aspect the 1st in the electron key system of described vehicle, the judgement of the position of described portable equipment is according to the measurement result of removing predetermined number from the measurement result of intensity maximum from described a plurality of measurement results and the average of remaining measurement result carries out.
Based on this formation, if obtain the average of the measurement result of received signal strength, and judge the position of portable equipment according to this average, just can suppress the impact that brings because of the deviation of the measurement result of received signal strength, and can the position of portable equipment be judged.Thus, because the high accuracy more position to portable equipment judges, so can more positively suppress the malfunction of electron key system.
The 3rd aspect of the present invention, aspect the 1st or in the electron key system of the 2nd described vehicle in aspect, described predetermined number is set as 1.
Be the noise of single-shot due to spike noise, so mostly be an impact that is subject to noise in a plurality of measurement results of the received signal strength that is determined by portable equipment.Therefore, as above-mentioned formation, if according to only remove the measurement result of intensity maximum from a plurality of measurement results of the received signal strength that determined by portable equipment and remaining measurement result judges the position of portable equipment, just can the impact of spike noise be suppressed, and can judge the position of portable equipment.So, if only use a method of removing in a plurality of measurement results that will be determined by portable equipment, about just the mensuration number of times of intensity is set as for several times to received signal, so the mensuration required time of received signal strength can be not long.Thus, can do one's utmost to shorten call duration time between portable equipment and mobile unit.
The 4th aspect of the present invention, aspect the 1st or in the electron key system of the 2nd described vehicle in aspect, when described portable equipment has carried out repeatedly measuring at the received signal strength to described the 1st wireless signal, to remove the measurement result of predetermined number from the measurement result of intensity maximum from described a plurality of measurement results and remaining measurement result is included in described the 2nd wireless signal, and send described the 2nd wireless signal.
Based on this formation, if carried out removing the processing of the measurement result of predetermined number from the measurement result of intensity maximum from a plurality of measurement results of received signal strength by the portable equipment side, compare with the situation of being carried out same processing by the mobile unit side, just can alleviate the processing load of mobile unit side.
the 5th aspect of the present invention, aspect the 1st or in the electron key system of the 2nd described vehicle in aspect, described mobile unit has outer periphery and the 1st indoor transmitter of car that described the 1st wireless signal is sent to the driver's seat car door of described vehicle, outer periphery and the 2nd indoor transmitter of car with the co-pilot seat car door that described the 1st wireless signal is sent to described vehicle, described mobile unit is according to the received signal strength that has been determined by described portable equipment when having sent described the 1st wireless signal from described the 1st transmitter, and the both sides of the received signal strength that has been determined by described portable equipment when having sent described the 1st wireless signal from described the 2nd transmitter judge the position of described portable equipment, and carry out the corresponding vehicle control of judged result therewith.
Consist of based on this, the number that not only can be equipped on the transmitter on mobile unit is set to 2, and can suppress the malfunction of electron key system.
The 6th aspect of the present invention, aspect the 1st or in the electron key system of the 2nd described vehicle in aspect, contain the signal that requires that is useful on the wake-up signal that makes described portable equipment starting and requires described portable equipment transmission authentication information the wireless signal that is sent to described portable equipment from described mobile unit, described the 1st wireless signal is described wake-up signal and described of requiring in signal.
Consist of based on this, because portable equipment is used the wake-up signal that sends from mobile unit or requires signal to carry out the mensuration of received signal strength, so need not send from mobile unit to portable equipment the new signal that is used for the mensuration received signal strength.Thus, due to the new signal that need not give and accept between portable equipment and mobile unit and be different from wake-up signal or require signal, so can shorten call duration time between portable equipment and mobile unit.
Based on the electron key system of vehicle of the present invention, even the environment of spike noise is arranged in generation, also can suppress malfunction.
Description of drawings
Fig. 1 is block diagram, and the system of an embodiment of the electron key system of its expression vehicle of the present invention consists of.
Fig. 2 means the top view of the planar configuration of vehicle.
Fig. 3 A is time chart, the content of the signal that its expression sends out from the 1st transmitter of mobile unit.
Fig. 3 B is time chart, the content of the signal that its expression sends out from the 2nd transmitter of mobile unit.
Fig. 3 C is time chart, the content of the signal that its expression portable equipment sends out.
Fig. 4 is the figure that schematically represents the frame structure of the wake-up signal that sends out from electron key system, the 1st transmitter mobile unit and the 2nd transmitter of the vehicle of described embodiment.
Fig. 5 is flow chart, the order of the processing that the electron key system of the vehicle of its expression by described embodiment is measured the RSSI value of wake-up signal.
Fig. 6 is the figure that schematically represents form that the RSSI value of the wake-up signal of the electron key system of the vehicle of described embodiment is calculated.
Symbol description
A1 ... the 1st communication zone, A2 ... the 2nd communication zone, 1 ... portable equipment, 2 ... mobile unit, 10 ... receiver, 11 ... transmitter, 12 ... the RSSI circuit, 13 ... the portable equipment control part, 13a ... memory, 20 ... the 1st transmitter, 21 ... the 2nd transmitter, 22 ... receiver, 23 ... tail-off, 24 ... lock-up cock, 25 ... brake sensor, 26 ... touch sensor, 27 ... the door lock locking mechanism, 28 ... engine control section, 29 ... vehicle-mounted control section, 29a ... memory.
The specific embodiment
Below, with reference to Fig. 1～Fig. 6, an embodiment of the electron key system of vehicle of the present invention is described.
As shown in Figure 1, in the electron key system of the vehicle of present embodiment, carry out various Control on Communication by the entrained portable equipment 1 of user and the radio communication of carrying between the mobile unit 2 on vehicle.
Wherein, portable equipment 1 possesses: receiver 10 receives the wireless signal that sends from mobile unit 2; And transmitter 11, send wireless signal to mobile unit 2.Receiver 10 1 receives the wireless signal that sends out from mobile unit 2, just described wireless signal is carried out reception ﹠ disposal, and exports this wireless signal to portable equipment 1 is carried out various controls portable equipment control part 13.In addition, be provided with RSSI circuit 12 on receiver 10, the value of the received signal strength (RSSI) of 12 pairs of wireless signals that receive of this RSSI circuit detects.RSSI circuit 12 1 detects the RSSI value of wireless signal, just exports this testing result to portable equipment control part 13.Portable equipment control part 13 carries out the transmission via the wireless signal of transmitter 11 according to the wireless signal that receives via receiver 10.The wireless signal that portable equipment control part 13 is receiving via receiver 10 is wake-up signal, makes portable equipment 1 starting, and will represent that via transmitter 11 the confirmation signal that portable equipment 1 has started is sent to mobile unit 2.In addition, portable equipment control part 13 is in the situation that receive wake-up signal, and the RSSI value by 12 pairs of these wake-up signals of RSSI circuit detects, and is located in the memory 13a of portable equipment control part 13 in this testing result is stored in.Like this, in the present embodiment, the 1st wireless signal that is used for mensuration RSSI value is wake-up signal.On the other hand, the wireless signal that portable equipment control part 13 is receiving via receiver 10 is to require signal, generation comprise the wake-up signal that is stored in memory 13a RSSI value and authentication information, be cognizance code (ID code) in interior response signal, and send these response signals by transmitter 11.Like this, in the present embodiment, the measurement result that comprises the RSSI value is response signal at the 2nd interior wireless signal.
Mobile unit 2 possesses the receiver 22 that wireless signal is sent to the 1st transmitter 20 of predetermined communication zone and the 2nd transmitter 21 and the wireless signal that sends from portable equipment 1 is received.
As shown in Figure 2, the 1st transmitter 20 is arranged on the driver's seat car door, sends wireless signal to the outer periphery that is set in this driver's seat car door and the 1st indoor communication zone A1 of car.In addition, the 2nd transmitter 21 is arranged on the co-pilot seat car door, sends wireless signal to the outer periphery that is set in this co-pilot seat car door and the 2nd indoor communication zone A2 of car.The 1st communication zone A1 and the 2nd communication zone A2 are set as, and are set in separately indoor regional overlapped of car.Further, receiver 22 1 shown in Figure 1 receives the wireless signal that sends out from portable equipment 1, just described wireless signal is carried out reception ﹠ disposal, and exports this wireless signal to vehicle is carried out various controls vehicle-mounted control section 29.
In addition, the lock-up cock 24 that operates when the tail-off 23 that mobile unit 2 operates when possessing ato unit and locking car door, these switches are for user's operation.As shown in Figure 2, tail-off 23 is push switch, is arranged on the instrument board of vehicle.Tail-off 23 1 is by user's push, and the operation signal that just will represent this operation exports vehicle-mounted control section 29 to.In addition, as shown in Figure 2, lock-up cock 24 is also push switch, is arranged on the door handle of vehicle.Lock-up cock 24 1 is by user's push, and the operation signal that just will represent this operation exports vehicle-mounted control section 29 to.
Further, as shown in Figure 1, the brake sensor 25 that the tread-on quantity to the brake pedal of vehicle that possesses mobile unit 2 detects the and whether user is touched the touch sensor 26 that door handle detects, the vehicle operating that these sensors carry out for detection of the user.Brake sensor 25 detects users and has or not the operation brake pedal, and the corresponding signal of testing result exports vehicle-mounted control section 29 to therewith.In addition, touch sensor 26 is for example formed by electrostatic capacitance sensor, whether the user is touched door handle detect, and export this testing result to vehicle-mounted control section 29.
Then, vehicle-mounted control section 29 according to each switch 23,24 and each sensor 25,26 output send wireless signals from the 1st transmitter 20 and the 2nd transmitter 21, perhaps carry out various vehicles according to the wireless signal that receives via receiver 22 and control.
As shown in Figure 3A, during any condition in (a1)～(a3) of vehicle-mounted control section 29 below having satisfied, generate wake-up signal, and send these wake-up signals by the 1st transmitter 20.
(a1) detect this tail-off 23 according to the output of tail-off 23 and be carried out push.
(a2) detect this lock-up cock 24 according to the output of lock-up cock 24 and be carried out push.
(a3) detect the user according to the output of touch sensor 26 and touched door handle.
At this, be positioned at when portable equipment 1 in the situation of illustrated the 1st communication zone A1 of Fig. 2, as shown in Figure 3 C, because 1 pair of wake-up signal that receives of portable equipment is made replying and is sent confirmation signal, so vehicle-mounted control section 29 receives via receiver 22 the confirmation signal that sends out from portable equipment 1.As shown in Figure 3A, vehicle-mounted control section 29 one receives the confirmation signal by this way, just generates and requires signal, and send this by the 1st transmitter 20 and require signal.Then, as shown in Figure 3 C, describedly require signal to make to reply and when sending out response signal what 1 pair of portable equipment sent, vehicle-mounted control section 29 receives response signals via receiver 22.At this moment, vehicle-mounted control section 29 carries out verification by the cognizance code in the memory 29a that is located at vehicle-mounted control section 29 to cognizance code contained in response signal with in being stored in, and portable equipment 1 is authenticated.Then, in the situation that cognizance code each other is consistent, the authentication that is judged as portable equipment 1 is set up.
On the other hand, contain the RSSI value of wake-up signal in the received response signal of vehicle-mounted control section 29, the RSSI value of this wake-up signal and from the 1st transmitter 20 to portable equipment 1 till distance between have dependency relation.Specifically, have following dependency relation: the RSSI value is larger, and the distance till from the 1st transmitter 20 to portable equipment 1 is just shorter.In the present embodiment, the experiment by in advance etc. obtain the RSSI value of described wake-up signal with from the 1st transmitter 20 to portable equipment 1 till the relation of distance, and the two relation is stored in the memory 29a of vehicle-mounted control section 29 as mapping.Vehicle-mounted control section 29 uses the mapping that is stored in memory 29a, and according to the RSSI value of wake-up signal contained in response signal, the distance till from the 1st transmitter 20 to portable equipment 1 is calculated.
In addition, as shown in Fig. 3 B, after sending wake-up signals by the 1st transmitter 20 and requiring signal, vehicle-mounted control section 29 then sends wake-up signals by the 2nd transmitter 21.At this moment, in the situation that portable equipment 1 is positioned at illustrated the 2nd communication zone A2 of Fig. 2, as shown in Fig. 3 B, Fig. 3 C, requires signal and send confirmation signal and response signal by portable equipment 1 by the 2nd transmitter 21 transmissions equally.Then, vehicle-mounted control section 29 carries out mapping calculation according to the RSSI value of wake-up signal contained in response signal to the distance till from the 2nd transmitter 21 to portable equipment 1.
Then, vehicle-mounted control section 29 distance till according to that calculate by this way, distance till from the 1st transmitter 20 to portable equipment 1 and from the 2nd transmitter 21 to portable equipment 1 judges portable equipment 1 is arranged in the outside and which indoor position of car of the outside of driver's seat car door, co-pilot seat car door.For example, as shown in Figure 2, in the situation that the distance till from the 1st transmitter 20 to portable equipment 1 be Fig. 2 apart from d10 and the distance till from the 2nd transmitter 21 to portable equipment 1 be Fig. 2 apart from d20, can judge that portable equipment 1 is positioned at the outside of driver's seat car door.In addition, for example, in the situation that the distance till from the 1st transmitter 20 to portable equipment 1 be Fig. 2 apart from d11 and the distance till from the 2nd transmitter 21 to portable equipment 1 be Fig. 2 apart from d21, can judge that portable equipment 1 is positioned at driver's seat.Like this, can be according to the distance till from the 1st transmitter 20 to portable equipment 1 and the distance till from the 2nd transmitter 21 to portable equipment 1, judge the position of portable equipment 1.In the present embodiment, relation between this three of position of distance till experiment by in advance etc. is obtained from the 1st transmitter 20 to portable equipment 1, the distance till from the 2nd transmitter 21 to portable equipment 1 and portable equipment 1, and this three's relation is stored in the memory 29a of vehicle-mounted control section 29 as mapping.Vehicle-mounted control section 29 uses the mapping that is stored in memory 29a, and according to the distance till the 1st transmitter 20 portable equipments 1 and the distance till from the 2nd transmitter 21 to portable equipment 1 position of portable equipment 1 is judged.
In addition, vehicle-mounted control section 29 is according to the position of the portable equipment 1 of having judged and whether carried out which operation in above-mentioned (a1)～(a3), judge whether to have carried out car door lock and the startup of release and motor in which operation.To be positioned at car indoor in the situation that tail-off 23 has been carried out push and portable equipment 1, and vehicle-mounted control section 29 is via sending engine restart requests such as vehicle-mounted networks such as CAN (Controller AreaNetwork) to engine control section 28.Thus, on-board engine is activated.In addition, in the situation that lock-up cock 24 has been carried out the outside that push and portable equipment 1 are positioned at the outside of driver's seat car door or are positioned at the co-pilot seat car door, vehicle-mounted control section 29 drives door lock locking mechanism 27, and car door is locked.Further, in the situation that the user has touched the outside that door handle and portable equipment 1 are positioned at the outside of driver's seat car door or are positioned at the co-pilot seat car door, vehicle-mounted control section 29 drives door lock locking mechanism 27, and car door is carried out release.
Yet, in the electron key system of such vehicle, when sneaking into above-mentioned spike noise in the wake-up signal of RSSI pH-value determination pH that portable equipment 1 carries out, the problem that can't be suitably the position of portable equipment 1 be judged can appear.So, in the present embodiment, in order to eliminate the impact of spike noise, the RSSI value of wake-up signal is carried out 3 times measure, and according to the measurement result of removing the intensity maximum from these measurement results and the average of 2 remaining measurement results judges the position of portable equipment 1.Below, be described in detail.
As shown in Figure 4, the wake-up signal of present embodiment has the frame structure that comprises for the train of pulse section that measures the RSSI value, and this train of pulse section is positioned at the latter half of office of staggering the distance corresponding with time width Ta from the fore-end of this wake-up signal.As shown in Figure 4, in train of pulse section, begin by constant cycle Tb from its front end, become the signal level corresponding with high level 3 times.
Then, with reference to Fig. 5, the order that the RSSI value of the wake-up signal that 13 pairs of portable equipment control parts are made of this frame structure is measured is described.In addition, when portable equipment control part 13 receives wake-up signal, carry out processing shown in Figure 5.
In processing as shown in Figure 5, at first, internal timer by portable equipment control part 13 to from begin via receiver 10 to receive wake-up signal the time elapsed time of lighting measure (step S1), and the Measuring Time Ta time of advent from then on the time light and undertaken 3 times by constant cycle Tb by 12 pairs of RSSI values of RSSI circuit and measure (step S2).Thus, as shown in Figure 5, the RSSI value of the signal level corresponding with the high level of contained train of pulse section in wake-up signal is carried out 3 times measure.Then, the average of 2 remaining RSSI values calculates (step S3) to remove maximum RSSI value from 3 RSSI value rs1～rs3 that determine.With the average of the measurement result that the calculates measurement result as the RSSI value of wake-up signal, generate the measurement result of the RSSI value that comprises this wake-up signal at interior confirmation signal, and by transmitter 11 transmission these confirmation signals (step S4).
Then, with reference to Fig. 6, the action case (effect) of the electron key system of present embodiment is described.
Be the noise of single-shot due to spike noise, so in the situation that sneaked into spike noise in wake-up signal, what be subject to this spike noise impact is the sub-fraction of whole wake-up signal.Therefore, even sneaked into spike noise in wake-up signal, spike noise is all sneaked at 3 places that become the signal level corresponding with high level that also seldom can occur in train of pulse section, and as shown in Figure 6, one of them can sneak into spike noise usually.In addition, at this, illustration the 1st place in becoming 3 places of the signal level corresponding with high level (being initial part) sneak into the situation of spike noise.Then, in the situation that portable equipment 1 receives such wake-up signal, measure if undertaken 3 times by 13 pairs of RSSI values of portable equipment control part, will be with the RSSI value rs1 in these measurement results as exceptional value.At this moment, due in the present embodiment, average by RSSI value rs2, the rs3 remaining to remove maximum RSSI value rs1 from 3 measurement results of RSSI value calculates to obtain the RSSI value of wake-up signal, so can be according to being subjected to spike noise to affect the RSSI value that less measurement result is obtained wake-up signal.Therefore, can be accurately the RSSI value of wake-up signal be detected.Thus, due in mobile unit 2, when contained RSSI value judges the position of portable equipment 1 according to response signal, can be more accurately the position of portable equipment 1 be judged, so can suitably carry out and the corresponding vehicle in the position of portable equipment 1 is controlled.The malfunction that therefore, can suppress electron key system.
In addition, if obtain the average of RSSI value, and judge according to this average and just can the impact that bring because of the deviation of measurement result be suppressed, and can judge the position of portable equipment 1 in the position of portable equipment 1.Thus, can be more accurately the position of portable equipment 1 be judged, so can more positively suppress the malfunction of electron key system.
Further, will just the mensuration number of times of RSSI value can be set as 3 times the left and right by a method of removing in 3 RSSI values of portable equipment 1 mensuration if only use, can be not long so measure the RSSI required time of value.Thus, can do one's utmost to shorten call duration time between portable equipment 1 and mobile unit 2.
As mentioned above, the electron key system based on the vehicle of present embodiment can obtain following effect.
(1) in portable equipment 1, the RSSI value of wake-up signal is carried out 3 times measure.In addition, in portable equipment 1, to the RSSI value of removing the intensity maximum from 3 RSSI value rs1～rs3 that determine and the average of 2 remaining RSSI values calculates, and with the RSSI value of this average as wake-up signal.On the other hand, in mobile unit 2, judge the position of portable equipment 1 according to the RSSI value of wake-up signal contained the answer signal that sends out from portable equipment 1.Thus, owing to can be accurately the position of portable equipment 1 being judged, so can suppress the malfunction of electron key system.
(2) when obtaining the RSSI value of wake-up signal, in 3 RSSI values that only will be determined by portable equipment 1, the RSSI value of intensity maximum is removed.Thus, because the number of times that 1 pair of RSSI value of portable equipment can be measured is set as the left and right 3 times, so can do one's utmost to shorten the call duration time between portable equipment 1 and mobile unit.
The processing of (3) average of RSSI value being calculated is undertaken by portable equipment 1.Thus, compare with the situation of being carried out same processing by mobile unit 2 sides, can alleviate the processing load of mobile unit 2 sides.
(4) be provided with the 1st transmitter 20 and the 2nd transmitter 21 on vehicle.Then, judge the position of portable equipment 1 according to the both sides of the RSSI value that has been determined by portable equipment 1 and the RSSI value that determined by portable equipment 1 when having sent wake-up signal from the 1st transmitter 20, and carry out vehicle according to this judged result and control when having sent wake-up signal from the 2nd transmitter 21.Thus, the number that not only can be equipped on the transmitter on vehicle is set to 2, and can suppress the malfunction of electron key system.
(5) be provided with in the wake-up signal that mobile unit 2 sends for the train of pulse section that measures the RSSI value.Thus, owing to sending the new signal that is used for measuring received signal strength from mobile unit 2, so the new signal that need not give and accept and be different from wake-up signal or require signal between portable equipment 1 and mobile unit 2.Therefore, can shorten call duration time between portable equipment 1 and mobile unit 2.
In addition, above-mentioned embodiment also can be implemented according to the following mode of this mode having been done suitable change.
Although in the above-described embodiment, the 1st transmitter 20 and the 2nd transmitter 21 are separately positioned on driver's seat car door and co-pilot seat car door, yet are not limited in this, the 1st transmitter 20 and the 2nd transmitter 21 configuration separately can suitably be changed.
Although in the above-described embodiment, the RSSI value of wake-up signal is included in response signal, yet, be not limited in this, also the RSSI value of this wake-up signal can be included in confirmation signal.
In the above-described embodiment, the number of times that the RSSI value of 1 pair of wake-up signal of portable equipment is measured is set as 3 times, yet is not limited in this, and the mensuration number of times of RSSI value can suitably be changed.In addition, in the situation that the mensuration number of times of RSSI value is set as 4 times, the number of the measurement result of also can suitable change removing when calculating mean value is such as to 2 measurement results of removing the intensity maximum from these measurement results and the average of 2 remaining measurement results calculates RSSI value of obtaining wake-up signal etc.In a word, as long as remaining measurement result is calculated the average of RSSI value according to remove the measurement result of predetermined number from the measurement result of intensity maximum from a plurality of measurement results of the RSSI value that determined by portable equipment 1.
In the above-described embodiment, by to the measurement result of removing the intensity maximum from 3 measurement results of the RSSI value that determined by portable equipment 1 and the average of 2 remaining measurement results calculates to obtain the RSSI value of wake-up signal.In order to replace this mode, for example also can adopt the measurement result that to remove the intensity maximum and any one mode as the RSSI value of wake-up signal in remaining 2 measurement results.
Also all data of 3 RSSI values being determined by portable equipment 1 can be included in response signal and with this response signal and be sent to mobile unit 2 from portable equipment 1, and be undertaken the RSSI value of removing the intensity maximum from 3 RSSI value rs1～rs3 and the processing that the average of 2 remaining RSSI values calculates by mobile unit 2 sides.Based on such formation, can alleviate the processing load of portable equipment 1.
Although in the above-described embodiment, the RSSI value of wake-up signal is measured, yet, in order to replace this mode, for example also can measure the RSSI value that requires signal.In addition, also can be different from wake-up signal and require signal, sending from the 1st transmitter 20 and the 2nd transmitter 21 the new signal that is used for measuring the RSSI value, and measured by the RSSI value of 1 pair of this new signal of portable equipment.
Although in the above-described embodiment, by the cognizance code that is stored in the cognizance code in portable equipment 1 and be stored in mobile unit 2 is carried out verification, portable equipment 1 is authenticated, yet, in order to replace this mode, for example also can address inquires to code by giving and accepting between portable equipment 1 and mobile unit 2 portable equipment 1 is authenticated, the mode that namely authenticates by challenge response authenticates portable equipment 1.
Although in the above-described embodiment, the electron key system of vehicle of the present invention is applied to carry out in the electron key system of startup of locking of car door and release and motor according to the position of portable equipment 1, yet, in order to replace this mode, for example also can be applied to send in the electron key system of some warning according to the position of portable equipment 1.In a word, so long as carry out the electron key system of the vehicle of predetermined vehicle control according to the position of portable equipment 1, just can be suitable for electron key system of the present invention.
In the above-described embodiment, the electron key system of vehicle of the present invention is applied to by sending the electron key system of position that wireless signals judge portable equipment 1 from carrying 2 transmitters on vehicle.In order to replace this mode, also can be applied in following electron key system, for example by sending from 1 transmitter that carries on vehicle the electron key system that wireless signal judges the position of portable equipment 1, perhaps by sending from carrying at the transmitter more than 3 on vehicle the electron key system that wireless signal judges the position of portable equipment 1.In a word, so long as the RSSI value of the wireless signal that sends out from mobile unit 2 by 1 pair of portable equipment is measured, and the position according to this measurement result judgement portable equipment 1, further carry out the electron key system of the vehicle of vehicle control according to this measurement result, just can be suitable for electron key system of the present invention.
Claims (6)
1. the electron key system of a vehicle, be positioned at the communication zone of the mobile unit of lift-launch on vehicle as condition take portable equipment, carry out radio communication between described mobile unit and described portable equipment, described portable equipment is measured the received signal strength of the 1st wireless signal when receiving the 1st wireless signal that sends from described mobile unit, and the 2nd wireless signal that will comprise this measurement result is sent to described mobile unit, described mobile unit judges the position of described portable equipment in described communication zone according to the measurement result of described received signal strength contained in described the 2nd wireless signal, and carry out the corresponding vehicle control of judged result therewith, the electron key system of described vehicle is characterised in that,
Described portable equipment is repeatedly measured the received signal strength of described the 1st wireless signal,
Described mobile unit judges the position of described portable equipment according to the measurement result of removing predetermined number from the measurement result of intensity maximum from a plurality of measurement results of the received signal strength measured by described portable equipment and remaining measurement result.
2. the electron key system of vehicle according to claim 1, wherein,
The judgement of the position of described portable equipment is according to the measurement result of removing predetermined number from the measurement result of intensity maximum from described a plurality of measurement results and the average of remaining measurement result carries out.
3. according to claim 1 or the electron key system of 2 described vehicles, wherein,
Described predetermined number is set as 1.
4. according to claim 1 or the electron key system of 2 described vehicles, wherein,
When described portable equipment has carried out repeatedly measuring at the received signal strength to described the 1st wireless signal, to remove the measurement result of predetermined number from the measurement result of intensity maximum from described a plurality of measurement results and remaining measurement result is included in described the 2nd wireless signal, and send described the 2nd wireless signal.
5. according to claim 1 or the electron key system of 2 described vehicles, wherein,
Described mobile unit has outer periphery and the 2nd indoor transmitter of car that described the 1st wireless signal is sent to the outer periphery of driver's seat car door of described vehicle and indoor the 1st transmitter of car and described the 1st wireless signal is sent to the co-pilot seat car door of described vehicle
The both sides of the received signal strength that described mobile unit basis has been determined by described portable equipment when having sent described the 1st wireless signal from described the 1st transmitter and the received signal strength that has been determined by described portable equipment when having sent described the 1st wireless signal from described the 2nd transmitter judge the position of described portable equipment, and carry out the corresponding vehicle control of judged result therewith.
6. according to claim 1 or the electron key system of 2 described vehicles, wherein,
Contain the signal that requires that is useful on the wake-up signal that makes described portable equipment starting and requires described portable equipment transmission authentication information the wireless signal that is sent to described portable equipment from described mobile unit, described the 1st wireless signal is described wake-up signal and described of requiring in signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011280387A JP5667038B2 (en) | 2011-12-21 | 2011-12-21 | Vehicle electronic key system |
| JP2011-280387 | 2011-12-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103174336A true CN103174336A (en) | 2013-06-26 |
| CN103174336B CN103174336B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210568287.9A Expired - Fee Related CN103174336B (en) | 2011-12-21 | 2012-12-12 | The electron key system of vehicle |
Country Status (2)
| Country | Link |
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| JP (1) | JP5667038B2 (en) |
| CN (1) | CN103174336B (en) |
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Also Published As
| Publication number | Publication date |
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| JP2013130013A (en) | 2013-07-04 |
| JP5667038B2 (en) | 2015-02-12 |
| CN103174336B (en) | 2016-01-20 |
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