JP2003120096A - Vehicle keyless entry system and receiver for vehicle keyless entry system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely receive radio data from a vehicle key and radio data from a steering part to precisely operate a load and to reduce the cost of a system. SOLUTION: This system comprises a steering transmitting device 2 mounted on the steering part of a vehicle, which generates and transmits first transmission type data by a second transmission part 33 according to the operation of a switch part 31; an RKE transmitting device 1 mounted on the vehicle key carried by a vehicle operator, which generates and transmits second transmission type data by a first transmission part 24 according to the operation of an unlock SW 22 or a lock SW 21; and a receiving device 3 mounted on the body part 11 of the vehicle, which performs the switching between a first receiving method for receiving the first transmission type data and a second receiving method for receiving the second transmission type data on the basis of the attachment and detachment state of the vehicle key to the body part 11 to receive the data from the steering transmitting device 2 or the RKE transmitting device 1, and outputs them to the vehicle internal load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle keyless entry system and a vehicle keyless system for controlling a door mechanism, a load in a vehicle, etc. by wirelessly communicating among a steering section, a body section and a vehicle key of a vehicle. The present invention relates to a receiver for an entry system.

[0002]

2. Description of the Related Art Conventionally, when a passenger enters or dismounts an automobile, a mechanical key is inserted into a key hole of the vehicle to lock or unlock a door, and a keyless for a vehicle utilizing radio waves or the like. Entry systems are known.

As shown in FIG. 3, a conventional vehicle keyless entry system includes an RKE transmitting device 101, which is a portable key held by a driver, and a steering transmitting device 102 mounted on a steering section in a vehicle. The steering transmission device 102 is mounted on the body portion 111 of the vehicle.
It is configured to include a first receiving device 104 that receives data from the RKE transmitting device 101 and a second receiving device 105 that is mounted on the body portion 111 of the vehicle to receive the data from the RKE transmitting device 101.

In such a conventional vehicle keyless entry system, when wireless communication is performed between the steering transmitter 102 and the first receiver 104, the driver operates the switch section 121 of the steering transmitter 102. As a result, the microcomputer 122 generates data, and the transmitter 123 transmits the data to the first receiver 10 via the antenna 124.
4 to send data.

On the other hand, in the first receiver 104, when the antenna 131 receives the data from the steering transmitter 102, the first receiver 132 processes the signal by a predetermined demodulation method, and the microcomputer 133 transmits the steering signal. A signal corresponding to the data from the device 102 is output to each load in the vehicle.

As a result, in the vehicle keyless entry system, the switch section 12 mounted on the steering section is provided.
A command for operating 1 is transmitted to each load in the vehicle to operate.

Further, in the conventional vehicle keyless entry system, the RKE transmitter 101 and the second receiver 1
When performing wireless communication with the R.05, the RKE transmitter 10
When the driver operates the first switch unit 141, the microcomputer 142 generates data, and the transmission unit 143 transmits the data to the second reception device 105 via the antenna 144.

On the other hand, in the second receiver 105, when the antenna 151 receives the data from the RKE transmitter 101, the second receiver 152 processes the signal by a predetermined demodulation method, and the microcomputer 153 transmits the RKE. Device 1
A signal corresponding to the data from 01 is output to each load in the vehicle.

As a result, in the vehicle keyless entry system, a command due to the operation of the switch portion 141 mounted on the vehicle key is transmitted to each load in the vehicle to operate. Specifically, in the vehicle keyless entry system, the second receiving device 105 causes the door mechanism to lock / unlock according to an instruction from the vehicle key.

[0010]

In the above-described conventional vehicle keyless entry system, the first receiver 132 and the second receiver 132 of the first receiver 104 mounted on the body 111 are mounted.
The second receiving unit 152 of the receiving device 105 employs the same demodulation method, and further, the first receiving device 104 and the second receiving device 105 receive wireless data of the same frequency to reduce the load in the body unit 111. It's working. That is, the wireless data transmitted from the steering transmitter 102 and the RKE
The radio data transmitted from the transmission device 101 has the same frequency.

Therefore, in the conventional vehicle keyless entry system, mutual interference may occur between the wireless data transmitted from the steering transmitter 102 and the wireless data transmitted from the RKE transmitter 101. When mutual interference occurs, it becomes impossible for the first receiving device 104 and the second receiving device 105 to receive accurate wireless data, and each load cannot operate correctly.

Further, the conventional vehicle keyless entry system is provided with two receiving units, a first receiving unit 132 and a second receiving unit 152, which receive the wireless data of the same demodulation method and the same frequency. So the system cost was high.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and accurately receives the wireless data from the vehicle key and the wireless data from the steering section to operate the load accurately, and An object of the present invention is to provide a vehicle keyless entry system and a vehicle keyless entry system receiver that reduce the system cost.

[0014]

In order to solve the above-mentioned problems, the invention according to claim 1 is mounted on a steering section of a vehicle, and a first section is provided in response to an operation of at least one operation section.
A first transmission device for transmitting data of a transmission method, and a second transmission device mounted on a vehicle key carried by a vehicle operator and transmitting data of a second transmission method in response to an operation of at least one operation unit. A first receiving method for receiving data of the first transmission method and a second receiving method of data, which is mounted on a body portion of a vehicle and receives data of the first transmission method based on a state of attachment / detachment of the vehicle key to / from the body portion. And a receiving device that switches between the two receiving systems and receives data from the first transmitting device or the second transmitting device and outputs the data to the in-vehicle load.

The invention according to claim 2 is the invention according to claim 1, wherein the receiving device is in the first receiving system when the vehicle key is in a worn state. Is received, and when the vehicle key is in the released state, the second reception system is used to receive the data from the second transmission device.

The invention according to claim 3 is the invention according to claim 1 or claim 2, wherein the first transmission method is an amplitude modulation method and the first reception method is an amplitude demodulation method. The second transmission method is a frequency modulation method and the second reception method is a frequency demodulation method.

In order to solve the above-mentioned problems, in the invention according to claim 4, a first transmitting device which is mounted on a steering portion of a vehicle and transmits data of the first transmitting method in response to an operation of at least one operating portion. And a second transmitter that is mounted on a vehicle key carried by a vehicle operator and transmits data of a second transmission method in response to an operation of at least one operation unit, and a body part of the vehicle is received. In a receiver for a vehicle keyless entry system mounted on a vehicle, a key state detecting means for detecting a detachable state of the vehicle key with respect to the body portion, and a detachable state of the vehicle key detected by the key state detecting means. Based on the first
According to the receiving method switching means for switching between the first receiving method for receiving the data of the transmitting method and the second receiving method for receiving the data of the second transmitting method, and the receiving method switched by the receiving method switching means. And a receiving unit that receives data from the first transmitting device or the second transmitting device and outputs the data to the in-vehicle load.

According to a fifth aspect of the invention, there is provided the invention according to the fourth aspect, wherein the receiving system switching means is the first receiving system when the vehicle key is in the wearing state, and the receiving means is the first receiving system. Receiving the data from the first transmitting device by a receiving method, the receiving method switching means is the second receiving method when the vehicle key is in the released state, and the receiving means is the second receiving method. It is characterized in that it receives data from the second transmitting device.

The invention according to claim 6 is the invention according to claim 4 or 5, wherein the first transmission method is an amplitude modulation method and the first reception method is an amplitude demodulation method. The second transmission method is a frequency modulation method and the second reception method is a frequency demodulation method.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The present invention is applied to a vehicle keyless entry system configured as shown in FIG. 1, for example.

This vehicle keyless entry system is
As shown in FIG. 1, an RKE transmitter 1 mounted on a vehicle key held by a driver, a steering transmitter 2 mounted on a steering unit in the vehicle, and an RKE transmitter mounted on a body 11 of the vehicle. The transmitter 1 and the receiver 3 for receiving the data from the steering transmitter 2 are provided.

The RKE transmitter 1 is mounted on a vehicle key carried by a vehicle operator, and is used to lock a vehicle door mechanism (not shown) and a lock SW 21 for unlocking the vehicle door mechanism. Unlock SW22
And a first control unit 23 connected to the lock SW 21 and the unlock SW 22, and a first transmission unit 24 that performs predetermined signal processing on data generated by the first control unit 23, and signal processing by the first transmission unit 24. A first antenna 25 for wirelessly transmitting the generated data is provided.

Lock SW11 and unlock SW22
Is operated by the driver to generate an operation input signal and output it to the first controller 23. Lock SW
21 is operated by the driver when locking the door mechanism of the vehicle, and the unlock SW 22 is operated by the driver when unlocking the door mechanism of the vehicle.

The first control unit 23 receives the operation input signal from the lock SW 21 and the unlock SW 22, and generates data to be transmitted to the receiving device 3 in accordance with the operation input signal indicating the operation content. When the first control unit 23 receives an operation input signal due to the lock SW 21 being pressed,
First, generating data indicating that the door mechanism is locked,
Output to the transmission unit 24. Further, when the operation input signal due to the pressing operation of the unlock SW 22 is input, the first control unit 23 generates data indicating that the door mechanism is unlocked and outputs the data to the first transmission unit 24.

The first transmission section 24 performs signal processing for converting the data input from the first control section 23 into a signal form capable of wireless communication. At this time, the first transmission unit 24 performs signal processing according to a preset first transmission method. Then, the first transmitting unit 24 outputs to the first antenna 25,
Wireless data is output from the first antenna 25.

The first transmission system by the first transmission unit 24 converts data from the first control unit 23 by, for example, an FM (Frequency Modulation) modulation system. In addition, the first transmitting unit 24 uses data having a different frequency from the data transmitted from the second transmitting unit 33, which will be described later.

The steering transmitter 2 is mounted on a steering section operated by a vehicle driver, and has a plurality of switch sections 31 operated by the vehicle driver and a switch section 31.
A second control unit 32 connected to the second control unit 32, a second transmission unit 33 that performs transmission processing on the data generated by the second control unit 32, and a second antenna that wirelessly transmits the data processed by the second transmission unit 33. 34 is provided.

The switch section 31, when pressed by the driver, generates an operation input signal and outputs it to the second control section 32. The switch unit 31 is operated by the driver when operating each load in the vehicle.

The second control section 32 inputs the operation input signal from the switch section 31 and generates data to be transmitted to the receiving device 3 in accordance with the operation input signal indicating the operation content. When the second control unit 32 receives the operation input signal due to the pressing operation of the switch unit 31, the second control unit 32 generates data indicating the operation content corresponding to each switch and outputs the data to the second transmission unit 33.

The second transmitter 33 performs signal processing for converting the data input from the second controller 32 into a signal form capable of wireless communication. At this time, the 2nd transmission part 33 performs conversion according to the 2nd transmission system different from the 1st transmission system set up beforehand. Then, the second transmitter 33 uses the second antenna 3
By outputting the data to No. 4, wireless data is output from the second antenna 34.

The transmission method by the second transmission unit 33 is, for example, the AM (Amplitude modulation) modulation method.
The data from the control unit 32 is converted. Further, the second transmitter 33 uses data having a frequency different from that of the data transmitted from the first transmitter 24.

The receiver 3 is mounted on the body 11 of the vehicle, and comprises an antenna 41, a receiver 42, and a third controller 43 which are wirelessly connected to the RKE transmitter 1 and the steering transmitter 2. There is.

The antenna section 41 is arranged in a range where it can wirelessly communicate with the steering transmitter 2, and the RKE transmitter 1
Also, wireless data from the steering transmitter 2 is detected and output to the receiver 42.

The receiving section 42 receives the data from the antenna section 41, and a key attaching / detaching switch 51 indicating whether or not the vehicle key having the RKE transmitting device 1 is attached to the key cylinder of the body section 11. Input the detection signal of.

As shown in the functional block diagram of FIG. 2, the receiving section 42 has a data input section 6 connected to the antenna section 41.
1, a demodulation method switching unit 62, a first demodulation processing unit 63, a second demodulation processing unit 64, and an attachment / detachment state detection unit 65 connected to the key attachment / detachment switch 51.

The attachment / detachment state detector 65 monitors the state of the key attachment / detachment switch 51 and detects whether or not the vehicle key is attached to the key cylinder based on the detection signal from the key attachment / detachment switch 51. The attachment / detachment state detection unit 65 outputs a detection signal indicating that the vehicle key is in the attached state to the demodulation method switching unit 62 when the vehicle key is inserted in the key cylinder, and removes the vehicle key when the vehicle key is removed from the key cylinder. The detection signal indicating the state is output to the demodulation method switching unit 62.

The demodulation method switching unit 62 includes the attachment / detachment state detection unit 6
According to the detection signal from 5, the data from the data input unit 61 is switched and output to the first demodulation processing unit 63 or the second demodulation processing unit 64. The demodulation method switching unit 62 determines that the data from the steering transmission device 2 has been input when the detection signal indicating the wearing state is input and the data from the data input unit 61 is input, and determines the second data. Demodulation processing unit 6
Output to 4. Further, when the demodulation method switching unit 62 inputs the data from the data input unit 61 when the detection signal indicating the released state is input, it determines that the data from the RKE transmitting device 1 has been input, and outputs the data. It is output to the first demodulation processing unit 63.

The first demodulation processing unit 63 receives the data of the first transmission system from the demodulation system switching unit 62 and demodulates the data of the first transmission system by the first demodulation system to generate the first demodulation data. To do. The first demodulation data is data for controlling a door mechanism (not shown), and is used for the lock SW2.
1 or corresponds to the operation content of the unlock SW 22.

The second demodulation processing unit 64 receives the transmission data of the second transmission system from the demodulation system switching unit 62, demodulates the data of the second transmission system by the second demodulation system, and demodulates the second data.
Generate demodulated data. The second demodulated data corresponds to the operation content of the switch unit 31.

The third controller 43 receives the first signal from the receiver 42.
Input the demodulated data or the second demodulated data, and input the first
The demodulated data or the second demodulated data is supplied to a load in the vehicle (not shown).

According to the vehicle keyless entry system configured as described above, the RKE transmitter 1 and the steering transmitter 2 transmit data of different frequencies by different transmission systems, and the reception device 3 complies with each transmission system. Since the demodulation process can be performed, mutual interference of wireless data does not occur and malfunction of the load does not occur.

Further, according to the vehicle keyless entry system, the RKE transmitter 1 can be operated in a state where the RKE transmitter 1 is removed from the key cylinder of the body portion 11. Therefore, by utilizing this fact, the key attach / detach switch 51 is released. It is possible to determine that the data received with the detection signal indicating is input to the demodulation method switching unit 62 is the data from the RKE transmitter 1.

On the other hand, according to this vehicle keyless entry system, the RKE transmitting device 1 cannot operate in a state where the RKE transmitting device 1 is inserted into the key cylinder of the body portion 11, and this is utilized. , The key attachment / detachment switch 51 outputs a detection signal indicating the wearing state to the demodulation method switching unit 62.
It is possible to determine that the data received in the state input in step 3 is the data from the steering transmitter 2.

Therefore, according to this vehicle keyless entry system, based on the attachment / detachment state of the vehicle key,
Since the data can be received by switching between the first demodulation scheme corresponding to the first transmission scheme and the second demodulation scheme corresponding to the second transmission scheme, the data can be received by one receiving unit 42. The cost can be reduced.

In this vehicle keyless entry system, the RKE transmitter 1 performs FM modulation to transmit data, and the steering transmitter 2 causes AM.
Since the data is modulated and the data is transmitted, the receiving device 3 uses RKE.
The data from the transmitter 1 and the data from the steering transmitter 2 can be reliably identified.

The above embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and other than this embodiment, as long as it does not deviate from the technical idea of the present invention, various types according to the design etc. Of course, it is possible to change.

That is, in the above-described embodiment, RK
The E transmitter 1 modulates the data by the FM modulation method and the first demodulation processing unit 63 performs the FM demodulation, and the steering transmitter 2 modulates the data by the AM modulation method and the second
An example in which the AM demodulation is performed by the demodulation processing unit 64 has been described, but the first modulation method and the second modulation method are the reception device 3
It suffices that it is possible to identify whether the data received in step 1 is the data transmitted by the RKE transmitter 1 or the data transmitted by the steering transmitter 2, and any signal form can be used.

[0049]

According to the first aspect of the present invention, the first receiving method and the second transmitting method for receiving the data of the first transmitting method by the receiving device based on the attachment / detachment state of the vehicle key with respect to the body portion. Since the data is switched between the second receiving method for receiving the data of the first transmission device and the data from the first transmitting device or the second transmitting device, the data from the first transmitting device interferes with the data from the second transmitting device. In addition to preventing the above, the device that receives the data of the two transmission methods can be configured by one device, and the cost of the system can be reduced.

According to the second aspect of the invention, the receiving device receives the data from the first transmitting device in the first receiving system when the vehicle key is in the worn state, and the vehicle key is in the released state. When the vehicle key is in the wearing state, the vehicle key cannot be operated when the vehicle key is in the wearing state in addition to the effect of the invention of claim 1. It is possible to switch between the first reception system and the second reception system by utilizing the fact that the vehicle key is operable when the vehicle key is in the released state.

In the invention according to claim 3, when the first transmission system is the amplitude modulation system, the first reception system is the amplitude demodulation system, and when the second transmission system is the frequency modulation system, the second transmission system is the second modulation system.
Since the receiving system is the frequency demodulating system, in addition to the effect of the first aspect of the invention, the data from the first transmitting device and the data from the second transmitting device can be reliably identified.

According to the fourth aspect of the present invention, the first receiving unit receives the data of the first transmission method by the receiving unit based on the attachment / detachment state of the vehicle key with respect to the body portion detected by the key state detecting unit. Receiving the data from the first transmitting device or the second transmitting device according to a receiving method switching means for switching between the second method and the second receiving method for receiving the data of the second transmitting method, and the receiving method switched by the receiving method switching means. Therefore, the interference between the data from the first transmitter and the data from the second transmitter is prevented, and
The device that receives the data of the two transmission methods can be configured by one device, and the system cost can be reduced.

According to the fifth aspect of the invention, when the vehicle key is in the wearing state by the receiving system switching means, the first receiving system is used, and the receiving means receives the data from the first transmitting device by the first receiving system. However, when the vehicle key is in the released state by the receiving method switching means, the second receiving method is used, and the receiving means receives the data from the second transmitting device by the second receiving method. Therefore, the effect of the invention of claim 4 is obtained. In addition, the vehicle key is inoperable when the vehicle key is in the worn state, and the vehicle key is inoperable when the vehicle key is in the released state. It is possible to switch between the two receiving systems.

According to the invention of claim 6, when the first transmission system is the amplitude modulation system, the first reception system is the amplitude demodulation system and the second transmission system is the frequency modulation system. Since the system is the frequency demodulation system, in addition to the effect of the invention of claim 4, the data from the first transmitter and the second
The data from the transmitting device can be reliably identified.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle keyless entry system to which the present invention is applied.

FIG. 2 is a block diagram showing a configuration of a receiving unit of a receiving device to which the present invention has been applied.

FIG. 3 is a block diagram showing a configuration of a conventional vehicle keyless entry system.

[Explanation of symbols]

1 RKE transmitter 2 Steering transmitter 3 receiver 11 body part 21 Lock SW 22 Unlock SW 23 First Control Unit 24 First transmitter 25 1st antenna 31 Switch part 32 second control unit 33 second transmitter 34 Second antenna 41 Antenna 42 Receiver 43 Third Control Unit 51 key detachable switch 61 Data input section 62 Demodulation method switching unit 63 First Demodulation Processing Unit 64 Second demodulation processing unit 65 Attachment / Detachment State Detection Unit

Claims (6)

[Claims] 1. A first transmitting device which is mounted on a steering section of a vehicle and which transmits data of a first transmission method in response to an operation of at least one operating section; and a vehicle key carried by a vehicle operator. A second transmission device that transmits data of a second transmission method in response to an operation of at least one operation unit; and a second transmission device that is mounted on a body portion of a vehicle, and is based on an attachment / detachment state of the vehicle key with respect to the body portion. Switching between a first receiving method of receiving data of the first transmitting method and a second receiving method of receiving data of the second transmitting method,
A keyless entry system for a vehicle, comprising: a transmitting device or a receiving device that receives data from the second transmitting device and outputs the data to an in-vehicle load. 2. The receiving device receives the data from the first transmitting device by the first receiving method when the vehicle key is in the worn state, and when the vehicle key is in the released state. 2. The second receiving method is used to receive data from the second transmitting device.
The vehicle keyless entry system described in. 3. The first transmission system is an amplitude modulation system, the first reception system is an amplitude demodulation system, the second transmission system is a frequency modulation system, and the second reception system is a frequency demodulation system. The keyless entry system for a vehicle according to claim 1 or 2, wherein 4. A first transmission device which is mounted on a steering section of a vehicle and which transmits data of a first transmission method according to an operation of at least one operation section, and a vehicle key which is carried by a vehicle operator. A vehicle keyless entry system receiving device mounted on a body part of a vehicle for receiving data from a second transmitting device that transmits data according to a second transmission method in accordance with an operation of at least one operation unit, wherein: A key state detecting means for detecting an attachment / detachment state of the vehicle key to / from the body part; The receiving method switching means for switching between the first receiving method and the second receiving method for receiving the data of the second transmitting method, and the receiving method switching means A receiving device for a keyless entry system for a vehicle, comprising: receiving means for receiving data from the first transmitting device or the second transmitting device and outputting the data to an in-vehicle load according to the receiving method. 5. The receiving method switching means is set to the first receiving method when the vehicle key is in the on state, and the receiving means receives the data from the first transmitting device in the first receiving method and receives the data. 5. The system switching means adopts the second receiving method when the vehicle key is in the released state, and the receiving means receives the data from the second transmitting device by the second receiving method. The receiving device for a keyless entry system for a vehicle according to item 1. 6. The first transmission method is an amplitude modulation method, the first reception method is an amplitude demodulation method, the second transmission method is a frequency modulation method, and the second reception method is a frequency demodulation method. The receiving device for a vehicle keyless entry system according to claim 4 or 5, wherein