JP2010138672A - Keyless entry system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyless entry system compatible in both a communicable distance and the response speed of an on-vehicle control apparatus. <P>SOLUTION: A first operation medium-speed signal a2 lower in transmission rate than a first operation high-speed signal a1 is continuously transmitted after a predetermined time from the transmission of the first operation high-speed signal a1. Further after a predetermined time, a first operation low-speed signal a3 lower in transmission rate than the first operation medium-speed signal a2 is continuously transmitted. BPFs (band-pass filters) 23a, 23b, 23c can detect the signals a1, a2, a3, and a door lock mechanism 9 performs unlocking operation by the first operation high-speed signal a1 transmitted earliest. When the first operation high-speed signal a1 is not received, the first operation medium-speed signal a2 or the first operation low-speed signal a3 long in communicable distance is received by a receiving antenna 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a keyless entry system that remotely locks / unlocks a vehicle door without using an engine key, and more particularly to a keyless entry system that can change a transmission rate of a signal transmitted from a portable device. is there.

  Conventionally, a vehicle keyless entry system performs wireless communication between a portable transmission / reception device (portable device) such as an electronic key carried by a passenger and a vehicle-side transmission / reception device (on-vehicle device) mounted on the vehicle. The door electromagnetic actuator is actuated and unlocked when the ID code transmitted from is authenticated as a regular ID code on the vehicle side.

  Patent Document 1 provides an in-vehicle device that receives a remote operation signal for controlling locking / unlocking of a door output from a portable device and an air pressure monitoring signal for monitoring the air pressure of a tire. Has proposed a technology that can switch the cut-off frequency according to the on / off state of the ignition switch.

  In Patent Document 1, since the cut-off frequency can be switched according to the ON / OFF state of the ignition switch, the vehicle-less device of the keyless entry system can be used also as a receiver for monitoring tire air pressure. The machine can be used efficiently.

JP 2005-120656 A

  On the other hand, in recent years, the digitization of vehicles has progressed rapidly, and various electronic control mechanisms are mounted on vehicles. There are also a number of control mechanisms that transmit and receive predetermined signals wirelessly, such as a keyless entry system and a tire pressure monitoring mechanism. For example, a so-called engine remote start mechanism that automatically starts the engine from a long distance is also part 1 thereof. One.

  In general, the engine remote start mechanism has a specification that allows the engine to be started when an ID code transmitted from a dedicated portable device is authenticated and matched with a regular ID code. As in Patent Document 1, as a vehicle-mounted device is also used, it is possible to improve the convenience of passengers by using a dedicated portable device also as a portable device of a keyless entry system.

  By the way, since the keyless entry system is mainly intended for locking / unlocking the door, the communicable distance of the transceiver in the keyless entry system is assumed to be a short distance assuming that the occupant approaches the door. Yes. Moreover, it is set as the structure which cannot be operated from a long distance also from a viewpoint of theft prevention. Therefore, the portable device of the keyless entry system has a weak radio wave and has a small shape with excellent portability.

  On the other hand, in the engine remote start mechanism, from the viewpoint of engine warm-up, auto air conditioner start-up, etc., it is required to operate from a remote place where it takes time until the occupant reaches the vehicle, Compared to the communicable distance of the keyless entry system, the communicable distance is a long distance. When considering the shared use of a portable device, it is possible to increase the communicable distance by increasing the size of the portable device and satisfy both requirements, but this results in deterioration of portability by the occupant.

  As shown in FIG. 9, the relationship between the communicable distance and the signal transmission rate (number of bits / sec) has a characteristic that the communicable distance is shorter as the transmission rate is higher. Therefore, the engine remote start mechanism attempts to expand the communicable area while suppressing the increase in size by lowering the transmission rate. However, similarly, when the signal transmission rate in the keyless entry system is lowered, when the occupant performs the door unlocking operation, the door unlocking operation does not occur immediately, and the response speed The problem remains in terms of

  An object of the present invention is to provide a keyless entry system that can achieve both a communicable distance and a response speed of an in-vehicle control device.

  The keyless entry system of the present invention includes a portable device carried by a passenger and an in-vehicle device capable of receiving a signal transmitted from the portable device, and the in-vehicle device receives a predetermined signal transmitted from the portable device. By doing so, the vehicle-mounted control device can be operated.

  In the first aspect of the invention, when the occupant performs a transmission operation, the portable device transmits the predetermined signal continuously a plurality of times, and the transmission rate of the predetermined signal transmitted later is transmitted first. It has a transmission rate variable means for making it lower than the transmission rate of the predetermined signal.

  In the first aspect of the invention, paying attention to the fact that the communicable distance and the signal transmission rate are inversely proportional to each other, the transmission rate variable means capable of switching the level of the transmission rate is provided. Even if it exists, it can be used widely from short distance to long distance.

  According to a second aspect of the present invention, in the first aspect of the present invention, the plurality of in-vehicle control devices are operated at a longer distance than the first in-vehicle control device operated at a short distance from the vehicle. The portable device has a plurality of transmission operation units that can operate the plurality of vehicle-mounted control devices by an operation by an occupant, and the transmission rate variable means is connected to the second vehicle-mounted control device. It operates when a corresponding transmission operation unit is operated.

  According to a third aspect of the present invention, in the second aspect of the present invention, the second in-vehicle control device is an engine remote start control unit for remotely starting the engine, and a transmission operation unit for operating the engine remote start control unit is provided. The transmission rate variable means operates when operated.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the second in-vehicle control device is a vehicle position detecting unit that detects a parking position of the vehicle, and a transmission operation unit that operates the vehicle position detecting unit is provided. The transmission rate variable means operates when operated.

  According to a fifth aspect of the present invention, the plurality of in-vehicle control devices are classified into a first in-vehicle control device that is operated at a short distance from the vehicle and a second in-vehicle control device that is operated at a longer distance than the first in-vehicle control device. The portable device has a plurality of transmission operation units that can operate the plurality of vehicle-mounted control devices by an operation by an occupant, and when the transmission operation unit that operates the first vehicle-mounted control device is operated, the predetermined signal In addition to increasing the transmission rate, the transmission rate of the predetermined signal is decreased when the transmission operation unit that operates the second in-vehicle control device is operated.

  According to the invention of claim 1, it is possible to achieve both the communicable distance and the response speed of the in-vehicle control device. In other words, because the communicable distance can be widely used from a short distance to a long distance, the communicable distance is a short distance, and the in-vehicle control device that requires a higher response speed than the so-called communication distance, and the communicable distance is a long distance It is possible to operate a vehicle-mounted control device that requires a longer communication distance than so-called responsiveness with a single portable device.

  Moreover, in order to transmit a predetermined signal continuously several times and to lower the transmission rate of the predetermined signal transmitted later than the transmission rate of the predetermined signal transmitted earlier, for example, a door unlock operation from a short distance When performing, the unlocking operation can be performed immediately after the operation. On the other hand, when operating from a relatively long distance, even if the previous predetermined signal cannot reach the vehicle-mounted device, a predetermined signal having a low transmission rate is subsequently transmitted, so that the door unlocking operation can be performed. . At this time, since the occupant is present at a long distance from which the predetermined signal does not reach, there is no sense of delay even if the response speed is not high.

  According to the second aspect of the present invention, the transmission rate varying means is activated when a transmission operation unit corresponding to the second vehicle-mounted control device that is operated from a long distance is operated. Even in the long-distance operation of the second in-vehicle control device, the in-vehicle device can reliably receive the predetermined signal.

  According to the invention of claim 3, since the transmission rate variable means operates when the transmission operation section that operates the engine remote start control unit is operated, the engine remote start is surely ensured even when operated from a long distance. Can be executed.

  According to the fourth aspect of the present invention, since the transmission rate variable means operates when the transmission operation unit that operates the vehicle position detecting means is operated, the vehicle position detection is ensured even when operated from a long distance. Can be executed.

  According to the invention of claim 5, it is possible to achieve both the communicable distance and the response speeds of a plurality of in-vehicle control devices. In other words, since the communicable distance can be widely used from a short distance to a long distance, one in-vehicle control device that requires a higher response speed than the communication distance and one in-vehicle control device that requires a longer communication distance than the responsiveness. It can be operated with one portable device.

  Hereinafter, the best mode for carrying out the present invention will be described.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the keyless entry system S, and FIG. 2 shows an external view of a portable transmission / reception apparatus (portable device) according to the present embodiment.

  As shown in FIG. 1, a portable device 1 that can be carried by an occupant includes a transmitter 2 having a crystal oscillator, a modulator 3, a controller 4, and six operation switches 5a, 5b, which are normally turned off and can be turned on / off. The transmitter switch 5 includes 5f, the transmission antenna 6, and a power source (not shown).

  As shown in FIG. 2, operation buttons 8 a, 8 b,..., 8 f (transmission operation unit) for remotely operating the liquid crystal display unit 7 and various in-vehicle control devices mounted on the vehicle V are installed on the surface of the portable device 1. Has been. The operation buttons 8a, 8b,... 8f are respectively linked to the operation switches 5a, 5b,... 5f, and for example, when the operation button 8a is turned on, that is, a so-called push operation, the operation switch 5a is turned on. The transmitter switch 5 is turned on.

  As shown in FIG. 1, the vehicle V of this embodiment has a plurality of various on-vehicle control devices that can be operated by remote control. The vehicle V includes a door lock mechanism 9 that can be locked / unlocked by operating an electromagnetic actuator of a door lock, a lift gate operating mechanism 10 that can similarly open a lift gate, and an engine remote start that can start an engine. And a mechanism 11 (engine remote start control means).

  Further, the vehicle V detects the position of the host vehicle V based on GPS information from the navigation system, and transmits a vehicle position detection mechanism 12 (vehicle position detection means), a hazard lamp, and a horn that can transmit this position information to the portable device 1. And a car find mechanism 13 for actuating a plurality of times. Although not shown, it is possible to mount a slide door operating mechanism capable of opening the slide door, an auto air conditioner operating mechanism capable of operating the automatic air conditioner, a door window opening / closing mechanism, etc., depending on the specification of the vehicle V.

  The operation buttons 8a, 8b... 8f are set corresponding to the operation of the various in-vehicle control devices. The operation button 8a is an unlocking operation of the door lock mechanism 9, the operation button 8b is an opening operation of the lift gate operation mechanism 10, the operation button 8c is a locking operation of the door lock mechanism 9, and the operation button 8d is an operation and operation of the car find mechanism 13. The button 8e is set to transmit position information of the vehicle position detection mechanism 12, and the operation button 8f is set to start the engine of the engine remote start mechanism 11.

  A vehicle-side transmitting / receiving device (on-vehicle device) 20 mounted on the vehicle V extracts a predetermined modulation signal from a control unit 21, an antenna 22 that receives a signal transmitted from the portable device 1, and a signal received by the receiving antenna 22. The band-pass filter (BPF) 23 to be used. Note that the receiving antenna 22 on the in-vehicle device 20 side is larger than the transmitting antenna 6 on the portable device 1 side, and is disposed inside the instrument panel of the vehicle V, for example.

  The control unit 21 includes a high-frequency amplifier, a mixer, a local transmitter, a received signal strength detection circuit (RSSI circuit), and the like (not shown), and is configured to demodulate a predetermined modulation signal transmitted from the portable device 1. Yes. Since the configuration of the control unit is known, the description thereof is omitted.

  The BPF 23 can detect three levels of frequencies: a BPF 23a that detects a signal with a high cutoff frequency, a so-called high transmission rate, a BPF 23b that has a lower cutoff frequency than the BPF 23a, and a BPF 23c that has a lower cutoff frequency than the BPF 23b. BPF 23a, 23b, and 23c.

  Each of the BPFs 23a to 23c is connected in parallel to the signal received by the receiving antenna 22, and is configured to be input to all the BPFs 23a to 23c when a predetermined signal is received. The number of BPFs 23 in the present embodiment is the number of transmission rates of signals to be used. However, the number of filters can be reduced by using an active filter with a variable detection frequency.

  In the keyless entry system S, various vehicle-mounted control devices are classified based on the operation distance from the vehicle V in consideration of the operation position by the occupant, the feeling of delay, the anti-theft property, and the like. That is, it is highly possible that the occupant operates various on-vehicle control devices from a short distance, and the on-vehicle control device related to the first operation that requires the most responsiveness. There is a high possibility that the device and the occupant will operate from a long distance, and it is classified as a vehicle-mounted control device related to the third operation that does not require responsiveness. The door lock mechanism 9 is classified into a first operation and a second operation by a lock / unlock operation.

  As shown in FIG. 3, the first operation corresponds to a control device that is highly likely to be operated by a passenger from a short distance, and the door lock mechanism 9 is unlocked and the lift gate operation mechanism 10 is lift gate open. When the vehicle V has a sliding door, the sliding door opening is also included in the first operation. The second operation corresponds to a control device that is highly likely to be operated from a medium distance and does not require responsiveness so much, and is a lock of the door lock mechanism 9 and an operation of the car find mechanism 13. The third operation corresponds to a control device that is highly likely to be operated from a long distance and does not require responsiveness, and is an engine start by the engine remote start mechanism 11 or an auto air conditioner operation. In this embodiment, the control device classified as the first operation corresponds to the first in-vehicle control device, and the control device classified into the second and third operations corresponds to the second in-vehicle control device.

  Next, operations of various in-vehicle control devices according to the keyless entry system S will be described.

  When the occupant turns on the operation button 8a of the portable device 1, the operation switch 5a is turned on, and a code signal corresponding to the unlocking operation (first operation) of the door lock mechanism 9 is sent from the control unit 4 to the modulation unit 3. Is output. The transmitter 2 has a 314.35 MHz crystal oscillator for a carrier signal. The modulator 3 modulates this carrier signal based on the code signal to create a modulated signal, and then transmits a high transmission rate from the transmitting antenna 6. The first operation high speed signal a1 is transmitted. The first high-speed signal a1 includes various data including an authentication ID code, a synchronization signal, and a door unlock command.

  As shown in FIG. 4A, after a predetermined time, for example, several milliseconds after the transmission of the first operating high speed signal a1, the first operating medium speed signal a2 having a transmission rate lower than that of the first operating high speed signal a1 continues. Further, after a predetermined time, the first operating low speed signal a3 having a transmission rate lower than that of the first operating medium speed signal a2 is continuously transmitted. The control unit 4 corresponds to a transmission rate variable means.

  The respective signals a1, a2, and a3 received by the receiving antenna 22 are distributed to the BPFs 23a to 23c. In the case of signal transmission from a short distance, the BPFs 23a, 23b, and 23c can detect the signals a1, a2, and a3, respectively, and the door lock mechanism 9 performs the unlock operation by the first operation high-speed signal a1 transmitted earliest. Do.

  In the case of signal transmission from a place far from the short distance, and when the receiving antenna 22 cannot receive the first operating high speed signal a1, the first operating medium speed signal a2 or the first operating low speed signal having a long communicable distance. a3 is received by the receiving antenna 22. Thereby, the signal is extracted and detected by the BPF 23b or the BPF 23c, and the door unlocking operation can be performed. In addition, from the viewpoint of preventing theft, it is not preferable to perform the unlocking operation from such a long distance that the vehicle V cannot be visually recognized. Therefore, the first operation low speed signal a3 for the door lock mechanism 9 is a distance that allows the vehicle V to be visually recognized. The transmission rate can be transmitted and received. When the operation button 8b is turned on to operate the lift gate operating mechanism 10, transmission / reception similar to the above is performed.

  In the keyless entry system S, unlike the transmission method shown in FIG. 4A, as shown in FIG. 4B, a signal having the same transmission rate may be transmitted twice. In this case, when the operation button 8c of the portable device 1 is turned on, the operation switch 5c is turned on, and a code signal corresponding to the lock operation (second operation) of the door lock mechanism 9 is sent from the control unit 4 to the modulation unit 3. Is output. The transmitter 2 has a 314.35 MHz crystal oscillator for a carrier signal. The modulator 3 modulates the carrier signal based on the code signal to create a modulated signal, and then generates a modulated signal from the transmitting antenna 6 at the first operating high speed. The signal a1 is continuously transmitted twice.

  After a predetermined time from the two transmissions of the first operating high-speed signal a1, the first operating medium speed signal a2 having a transmission rate lower than the first operating high-speed signal a1 is continuously transmitted twice, and further, after a predetermined time, The first operating low speed signal a3 having a transmission rate lower than that of the first operating medium speed signal a2 is continuously transmitted twice. These six signals a1, a2, and a3 are all transmitted continuously at predetermined time intervals.

  The respective signals a1, a2, and a3 received by the receiving antenna 22 are distributed to the BPFs 23a to 23c. In the case of signal transmission from a relatively short distance, the BPFs 23a, 23b, and 23c can detect the signals a1, a2, and a3, respectively, and the door lock mechanism 9 is locked by the first operation high-speed signal a1 transmitted earliest. I do.

  In the case of signal transmission from a place farther than the distance, and when the receiving antenna 22 cannot receive the first operating high speed signal a1, the first operating medium speed signal a2 or the first operating low speed signal a3 having a long communicable distance. Is received by the receiving antenna 22. Thereby, the signal is detected by the BPF 23b or the BPF 23c, and the door lock operation is enabled. When the operation button 8d is turned on to operate the car find mechanism 13, and when the operation button 8e is turned on to operate the vehicle position detection mechanism 12 corresponding to the third operation, the engine remote start mechanism 11 is operated, the same transmission / reception as described above is performed when the operation button 8f is turned on.

  When the operation button 8e is turned on to operate the vehicle position detection mechanism 12, the vehicle position detection mechanism 12 detects the position of the host vehicle V based on GPS information from the navigation system mounted on the vehicle V. The in-vehicle device 20 returns this position information to the portable device 1. The portable device 1 is configured to display the direction in which the vehicle V exists on the display unit 7 based on the position information of the vehicle V with an arrow or the like.

  Furthermore, when the operation of various on-vehicle control devices is performed by the transmission signal from the portable device 1, the operation completion signal is transmitted from the on-vehicle device 20 to the portable device 1 so that the occupant can confirm the completion of the operation. Yes. Moreover, the portable device 1 is configured to display an operation completion on the display unit 7 when an operation completion signal is received from the in-vehicle device 20.

The transmission control process of the keyless entry system S will be described based on the flowchart of FIG. Si (i = 1, 2,...) Indicates each step.
The control unit 4 of the portable device 1 always detects the operation of each transmitter switch 5 every predetermined cycle, and determines whether or not each operation switch 5a to 5f constituting the transmitter switch 5 is turned on. Perform (S1). As a result of the determination in S1, when the transmitter switch 5 is not turned on, the detection is continued.

  If the transmitter switch 5 is turned on as a result of the determination in S1, the process proceeds to S2, and the first operation high-speed signal a1 having a high transmission rate is transmitted. As a result of the determination in S1, when the transmitter switch 5 is not turned on, the detection is continued.

  After the transmission of S2, the process proceeds to S3, and the first operation medium speed signal a2 having a transmission rate lower than that of the first operation high speed signal a1 is transmitted. After the transmission of S3, the process proceeds to S4, the first operation low speed signal a3 having a transmission rate lower than that of the first operation middle speed signal a2 is transmitted, and the process returns. In addition, the transmission signal of S2-S4 has stored the operation command data of the vehicle equipment corresponding to an operation button.

Next, operations and effects of the keyless entry system S according to the first embodiment will be described.
Since the communicable distance by the portable device 1 can be widely used from a short distance to a long distance, the first operation of the in-vehicle control device that requires a higher response speed than the communication distance and a communication distance longer than the responsiveness are required. The second operation and the third operation of the in-vehicle control device can be operated with one portable device 1.

  In addition, the first in-vehicle control is performed in order to continuously transmit the signal to the predetermined on-vehicle control device three times and to lower the transmission rate of the predetermined signal transmitted later than the transmission rate of the predetermined signal transmitted earlier. By receiving the first operation high-speed signal a1 having a high transmission rate for the device, the control device can be operated immediately after the operation of the portable device 1, and the passenger can be prevented from feeling a delay. In addition, when the operation button of the portable device 1 is operated from a long distance, the first operation high-speed signal a1 having a high transmission rate that is transmitted first is transmitted continuously even if the vehicle-mounted device 20 cannot receive it. Since the on-vehicle device 20 receives the first operation medium speed signal a2 or the first operation low speed signal a3, the on-vehicle control device can be reliably operated.

Next, a transmission control process according to the second embodiment will be described based on the flowchart of FIG. In addition, the same code | symbol is attached | subjected about the structure similar to Example 1. FIG.
The control unit 4 of the portable device 1 always detects the operation of each transmitter switch 5 every predetermined cycle, and determines whether or not each operation switch 5a to 5f constituting the transmitter switch 5 is turned on. Perform (S11). If the result of determination in S11 is that the transmitter switch 5 is not turned on, detection continues.

  When the transmitter switch 5 is turned on as a result of the determination in S11, the process proceeds to S12, and it is determined whether or not the operation button corresponding to the first in-vehicle device is turned on. If the operation button corresponding to the first in-vehicle device is turned on as a result of the determination in S12, the process proceeds to S13, and the first operation high speed signal a1 having a high transmission rate is transmitted and the process returns.

  As a result of the determination in S12, when the operation button corresponding to the first in-vehicle device is not turned on, when the operation button is operated for the so-called second operation and third operation, the process proceeds to S14 and the first operation high speed with a high transmission rate is obtained. Signal a1 is transmitted. After the transmission of S14, the process proceeds to S15, and the first operation medium speed signal a2 having a transmission rate lower than that of the first operation high speed signal a1 is transmitted. After the transmission of S15, the process proceeds to S16, the first operation low speed signal a3 having a transmission rate lower than that of the first operation middle speed signal a2 is transmitted, and the process returns.

Next, operations and effects of the keyless entry system S according to the second embodiment will be described.
Since the communicable distance by the portable device 1 can be widely used from a short distance to a long distance, the first operation of the in-vehicle control device that requires a higher response speed than the communication distance and a communication distance longer than the responsiveness are required. The second operation and the third operation of the in-vehicle control device can be operated with one portable device 1.

  And since the control part 4 as a transmission rate variable means operate | moves when the operation button corresponding to the 2nd vehicle-mounted control apparatus operated from a long distance is operated, it is the 2nd vehicle-mounted which is easy to generate | occur | produce unreachable of a predetermined signal. Even if it is long-distance operation of a control apparatus, the vehicle equipment 20 can receive a predetermined signal reliably.

  In particular, when the operation button 8f for operating the engine remote start mechanism 11 is operated, the transmission rate of the predetermined signal a3 transmitted later is made lower than the transmission rate of the predetermined signal a1 transmitted earlier, thereby Even when operated from a distance, the engine remote start can be reliably executed.

  Further, when the transmission operation unit that operates the vehicle position detection mechanism 12 is operated, the transmission rate of the predetermined signal a3 transmitted later is made lower than the transmission rate of the predetermined signal a1 transmitted first, thereby Position detection can be performed reliably. And since the direction of a vehicle position is displayed on the display part 7 of the portable device 1, the position detection by a passenger | crew becomes easy.

  Furthermore, after the operation button of the portable device 1 is operated, the operation completion of the vehicle-mounted control device is returned from the vehicle-mounted device 20 side, and the operation completion is displayed on the display unit 7, so that the operation confirmation by the occupant becomes easy.

  Next, Example 3 will be described with reference to FIG. FIG. 7 shows a transmission signal of the portable device 1 according to the keyless entry system S. The system configuration is the same as that of the first embodiment, and the same mechanism and the like are denoted by the same reference numerals.

(First operation)
As shown in FIG. 7A, when the operation button 8a of the portable device 1 is turned on, the operation switch 5a is turned on, and the unlocking operation (first operation) of the door lock mechanism 9 from the control unit 4 to the modulation unit 3 is performed. ) Is output in accordance with (). The transmission antenna 6 transmits the first operation high-speed signal a1 having a high transmission rate. The first high-speed signal a1 includes various data including an authentication ID code, a synchronization signal, and a door unlock command.

  After a predetermined time from the transmission of the first operating high-speed signal a1, the first operating high-speed signal a1 having the same transmission rate as the first operating high-speed signal a1 is continuously transmitted. Further, after the predetermined time, the first operating high-speed signal a1 is Sent continuously. That is, the first operation high-speed signal a1 is transmitted three times by turning on the operation button 8a.

  The signals a1, a1, and a1 received by the receiving antenna 22 are distributed to the BPFs 23a to 23c, and the signal a1 is detected by the BPF 23a. With the above configuration, the door lock mechanism 9 performs the unlocking operation by the first operation high speed signal a1 detected earliest.

  Further, even if the in-vehicle device 20 cannot receive the first first high-speed signal a1 due to factors such as external noise, the second and third first-operation high-speed signals a1 are transmitted, so that the receiving antenna 22 is surely received. Received. In addition, this 1st operation operation is performed with respect to the 1st vehicle-mounted control apparatus corresponding to a 1st operation | movement.

(Second operation)
As shown in FIG. 7B, when the operation button 8c of the portable device 1 is turned on, the operation switch 5c is turned on, and the lock operation of the door lock mechanism 9 from the control unit 4 to the modulation unit 3 (second operation). A code signal corresponding to the signal is output. The transmission antenna 6 transmits the second operation signal b1 having a transmission rate lower than that of the first operation high-speed signal a1.

  After a predetermined time from the transmission of the second operation signal b1, the second operation signal b1 having the same transmission rate as that of the second operation signal b1 is continuously transmitted. Further, after the predetermined time, the second operation signal b1 is continuously transmitted. Is done. That is, the second operation signal b1 is transmitted three times by turning on the operation button 8c.

  The signals b1, b1, and b1 received by the receiving antenna 22 are distributed to the BPFs 23a to 23c, and the signal b1 is detected by the BPF 23b. With the above configuration, the door lock mechanism 9 performs the lock operation according to the second operation signal b1 detected earliest.

  Even if the in-vehicle device 20 cannot receive the first second operation signal b1 due to factors such as external noise, the second operation signal b1 for the second time and the third time is transmitted. Is done. In addition, this 2nd operation operation is performed with respect to the 2nd vehicle-mounted control apparatus corresponding to a 2nd operation | movement.

(Third operation)
As shown in FIG. 7C, when the operation button 8f of the portable device 1 is turned on, the operation switch 5f is turned on, and the engine remote start mechanism 11 is started (third operation) from the control unit 4 to the modulation unit 3. ) Is output in accordance with (). The transmission antenna 6 transmits a third operation signal c1 having a transmission rate lower than that of the second operation signal b1.

  After a predetermined time from the transmission of the third operation signal c1, the third operation signal c1 having the same transmission rate as that of the third operation signal c1 is continuously transmitted. Further, after the predetermined time, the third operation signal c1 is continuously transmitted. Is done. That is, the third operation signal c1 is transmitted three times by turning on the operation button 8f.

  The signals c1, c1, and c1 received by the receiving antenna 22 are distributed to the BPFs 23a to 23c, and the signal c1 is detected by the BPF 23c. With the above configuration, the engine remote start mechanism 11 performs the lock operation by the third operation signal c1 detected earliest.

  Even if the in-vehicle device 20 cannot receive the first third operation signal c1 due to factors such as external noise, the second and third third operation signals c1 are transmitted, so that the reception antenna 22 can reliably receive them. Is done. In addition, this 3rd operation operation is performed with respect to the 3rd vehicle-mounted control apparatus corresponding to a 3rd operation | movement.

The transmission control process of the keyless entry system S will be described based on the flowchart of FIG. Si (i = 21, 22...) Indicates each step.
The control unit 4 of the portable device 1 always detects the operation of the transmitter switch 5 every predetermined cycle, and determines whether or not the transmitter switch 5 is turned on (S21). If any of the operation switches 5a to 5f of the transmitter switch 5 is not turned on as a result of the determination in S21, the detection is continued.

  If the transmitter switch 5 is turned on as a result of the determination in S21, the process proceeds to S22, and it is determined whether or not the operation button corresponding to the first in-vehicle control device has been turned on. If the operation button corresponding to the first in-vehicle control device is turned on as a result of the determination in S22, the process proceeds to S23, and the first operation high speed signal a1 having a high transmission rate is transmitted three times and the process returns.

  As a result of the determination in S22, when the operation button corresponding to the first in-vehicle control device is not turned on, the process proceeds to S24, and it is determined whether or not the operation button corresponding to the second in-vehicle control device is turned on. As a result of the determination in S24, when the operation button corresponding to the second in-vehicle control device is turned on, the process proceeds to S25, and the second operation signal b1 having a transmission rate lower than the first operation high speed signal a1 is transmitted three times. And return.

  As a result of the determination in S24, when the operation button corresponding to the second vehicle-mounted control device is not turned on, or when the operation button corresponding to the so-called third vehicle-mounted control device is turned on, the process proceeds to S26, and the second The third operation signal c1 having a transmission rate lower than that of the operation signal b1 is transmitted three times and the process returns.

Next, operations and effects of the keyless entry system S according to the third embodiment will be described.
Since the communicable distance by the portable device 1 can be widely used from a short distance to a long distance, the first operation of the in-vehicle control device that requires a higher response speed than the communication distance and a communication distance longer than the responsiveness are required. The second operation and the third operation of the in-vehicle control device can be operated with one portable device 1.

  In addition, when an operation button of an in-vehicle control device that does not require responsiveness is operated, the signal transmission rate is lowered and a continuous signal is transmitted a plurality of times, so that reception by the in-vehicle device 20 can be ensured. .

Next, a modification in which the above embodiment is partially changed will be described.
1] In the first embodiment, the example in which the in-vehicle device has three BPFs arranged in parallel has been described. However, it is only necessary to detect at least signals having different transmission rates capable of controlling a plurality of in-vehicle control devices. It is also possible to install an antenna for each BPF.

2) In the above-described embodiment, the example in which the transmission rate of the lock operation and the unlock operation of the door lock mechanism 9 is changed has been described, but it is also possible to use a high-speed signal with a high transmission rate.

3] In the above embodiment, the example in which the first vehicle-mounted control device is divided into the control device related to the first operation and the second vehicle-mounted control device is divided into the control devices related to the second and third operations has been described. It is also possible to classify the device as a control device according to the first and second operations, and the second in-vehicle control device as a control device according to the third operation.

4) In addition, those skilled in the art can implement the present invention in various forms added with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

It is a figure of the keyless entry system concerning Example 1 of the present invention. 1 is an external view of a portable device according to Embodiment 1. FIG. It is the table | surface which classified the vehicle-mounted control apparatus based on the distance from the vehicle which a passenger | crew operates a portable device. It is a related figure of operation of an operation button of a portable machine concerning Example 1, and a transmission signal, (a) is a transmission signal characteristic for the 1st operation, (b) is a transmission signal characteristic for the 2nd operation and the 3rd operation. It is. 4 is a flowchart of a transmission control process of the keyless entry system according to the first embodiment. 12 is a flowchart of a transmission control process of the keyless entry system according to the second embodiment. FIG. 6 is a diagram illustrating the relationship between the operation button operation and the transmission signal of the portable device according to the second embodiment, where (a) is a first operation transmission signal characteristic, (b) is a second operation transmission signal characteristic, and (c). Is the third operating transmission signal characteristic. 12 is a flowchart of a transmission control process of the keyless entry system according to the second embodiment. It is a characteristic view of the transmission rate of a transmission signal, and a communicable distance.

Explanation of symbols

V Vehicle S Keyless entry system 1 Portable device 4 Control unit 5 Transmitter switches 5a to 5f Operation switches 8a to 8f Operation buttons 9 Door lock mechanism 10 Lift gate operation mechanism 11 Remote engine start mechanism 12 Vehicle position detection mechanism 13 Car find mechanism 20 Machine 21 Control unit 23a-c BPF

Claims (5)

A portable device carried by the occupant and an in-vehicle device capable of receiving a signal transmitted from the portable device, and the in-vehicle device operates the in-vehicle control device by receiving a predetermined signal transmitted from the portable device. In a possible keyless entry system,
When the transmission operation by the occupant is performed, the portable device continuously transmits the predetermined signal a plurality of times, and the transmission rate of the predetermined signal transmitted later is higher than the transmission rate of the predetermined signal transmitted earlier. A keyless entry system having a transmission rate variable means for lowering. The plurality of in-vehicle control devices are classified into a first in-vehicle control device that is operated at a short distance from the vehicle and a second in-vehicle control device that is operated from a longer distance than the first in-vehicle control device,
The portable device has a plurality of transmission operation units that can be operated by an operation by a passenger of the plurality of in-vehicle control devices,
2. The keyless entry system according to claim 1, wherein the transmission rate variable unit is activated when a transmission operation unit corresponding to the second in-vehicle control device is operated.   The second vehicle-mounted control device is engine remote starting means for remotely starting the engine, and the transmission rate variable means is operated when a transmission operation unit for operating the engine remote starting means is operated. The keyless entry system according to claim 2.   The second in-vehicle control device is a vehicle position detecting means for detecting a parking position of the vehicle, and the transmission rate varying means is operated when a transmission operation unit for operating the vehicle position detecting means is operated. The keyless entry system according to claim 2. A plurality of in-vehicle control devices having a portable device carried by an occupant and an in-vehicle device capable of receiving a signal transmitted from the portable device, and the in-vehicle device receiving a predetermined signal transmitted from the portable device In the keyless entry system that can operate
The plurality of vehicle-mounted control devices are classified into a first vehicle-mounted control device that is operated at a short distance from the vehicle and a second vehicle-mounted control device that is operated at a longer distance than the first vehicle-mounted control device,
The portable device has a plurality of transmission operation units that can operate the plurality of in-vehicle control devices by an operation by an occupant, and transmits the predetermined signal when the transmission operation unit that operates the first in-vehicle control device is operated. A keyless entry system characterized by increasing a rate and decreasing a transmission rate of the predetermined signal when a transmission operation unit for operating the second in-vehicle control device is operated.