JPH0925752A - Keyless entry device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the convenience property by requiring no manual locking or unlocking action, and automatically locking or unlocking a door. SOLUTION: A transmitter 1 intermittently transmits the ID inherent to a device generated by an ID generation section 5 through an intermittent transmission section 6 and an antenna 7. A controller 2 receives the radio wave through an antenna 8 and a reception section 9, and it compares the demodulated ID with the ID stored in advance. If they coincide, the received field intensity is strong and a user approaches the door of an automobile, and the door of the automobile is unlocked. If the demodulated ID is noncoincident with the ID stored in advance, the received field intensity is weak, the user leaves the door of the automobile, and the door of the automobile is locked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyless entry device for remotely locking or unlocking a door of an automobile or the like.

[0002]

2. Description of the Related Art Conventionally, a keyless entry device of this type has a key or key holder type transmitter incorporating a transmitting circuit for transmitting a weak electric wave for remotely controlling the lock or unlock of a door of an automobile or the like. ing. Further, the automobile is provided with a receiver that receives a transmission signal from the transmitter and outputs a signal for locking or unlocking the door.

FIG. 6 is a block diagram showing a schematic configuration of a conventional keyless entry device using weak radio waves. FIG.
In this example, the transmitter 2 is a key or key holder type.
0 and a controller 23 mounted on an automobile, the transmitter 20 includes a transmitter (not shown), a lock switch (SW) 21 that is pressed when locking, and
It has an unlock switch (SW) 22 that is pressed when unlocking. The controller 23 includes an antenna 24 that receives a transmission signal (weak radio wave) from the transmitter 20, and a receiving unit 5 that outputs a lock signal or an unlock signal based on the reception signal from the antenna 24.
It has an actuator 26 that locks or unlocks the door with a lock signal or an unlock signal from the receiving unit 5. The operation of the keyless entry device configured as described above will be described below.

An individual personal identification number (ID) unique to this device is set in the transmitter 20, so that the user can lock SW2.
A signal for locking or unlocking is transmitted from the transmitting unit by pressing 1 or the unlock SW 22. This transmission is performed by the antenna 24 of the controller 23.
The receiving unit 5 identifies the ID based on the received signal and outputs a lock signal or an unlock signal for determining the lock or unlock of the ID. The actuator 26 opens and closes the door in response to the lock signal or the unlock signal from the receiver 5.

As described above, in the conventional keyless entry device, the door can be locked or unlocked (opened / closed) by pressing the lock SW 21 or the unlock SW 22 of the transmitter 20.

[0006]

However, in the conventional keyless entry device, the door can be locked or unlocked by depressing the lock SW21 or the unlock SW22, which does not require manual operation by the user. is there. In other words, when both hands are occupied, there is a drawback that the operation cannot be performed.

The present invention solves such a conventional problem. The door can be locked or unlocked automatically without the need for manual operation of locking or unlocking. An object is to provide an improved keyless entry device.

[0008]

In order to achieve the above object, a keyless entry device according to claim 1 is a portable transmitter for remotely operating a lock or unlock of a door, and a transmission from the portable transmitter. And a controller for controlling the lock or unlock of the door by a signal, the portable transmitter is provided with a wireless transmission means for wirelessly transmitting the personal identification number information peculiar to this device, and the controller is the portable transmitter. The receiving means for receiving the transmission signal and demodulating the individual personal identification number information, the storage means for storing the individual personal identification number information in advance, the individual personal identification number received by the receiving means and the individual personal identification number stored in the storage means are provided. Comparison means to compare,
The door opening / closing control means controls unlocking when the individual personal identification number received by the comparing means matches the stored individual personal identification number, and locks when the individual personal identification number does not match.

The keyless entry device according to claim 2 is
The receiving means includes a high-frequency processing unit that processes a wireless reception signal, a demodulation unit that demodulates individual personal identification number information from a signal output by the high-frequency processing unit, and a reception electric field strength of a transmission signal from a portable transmitter is a predetermined value or more. The output signal level of the high-frequency processing unit is compared with a preset threshold value to determine whether or not, and when the output signal level is equal to or higher than a predetermined value, a comparison unit that outputs the comparison value signal and a comparison value from the comparison unit Signal ON / OFF means for transmitting the demodulated signal of the demodulation section according to the signal.

A keyless entry device according to claim 3 is
The portable transmitter uses a battery as a power source, and the wireless transmission means intermittently transmits the personal identification number information.

[0011]

With such a configuration, in the keyless entry device according to the first aspect, the controller receives the transmission from the portable transmitter, demodulates the individual personal identification number unique to the device, and stores it as the individual personal identification number. Compare it with the individual PIN code. When the received personal identification number and the stored personal identification number match, unlocking is performed, and when they do not match, locking is controlled. That is,
If the personal identification number demodulated by the controller and the pre-stored personal identification number match, the received electric field strength of the transmission signal (radio wave) from the portable transmitter is strong, and the user is The door is unlocked because it is approaching the door. If they do not match, the received electric field strength of the transmission signal (radio wave) from the portable transmitter is weak and the user is away from the door of the automobile equipped with the controller, so the door is controlled to be locked. Therefore, the manual operation of locking or unlocking is unnecessary, and the door can be locked or unlocked automatically.

The keyless entry device according to claim 2 is
The output signal of the high frequency processing unit is compared with a preset threshold value, and when the received electric field strength of the transmission signal from the portable transmitter is equal to or higher than a predetermined value, the demodulated individual personal identification number is transmitted to perform unlock control. Is going. As a result, unlock control is performed when the personal identification number demodulated by the controller matches the pre-stored personal identification number, and when the strong received electric field strength is equal to or higher than a predetermined value, more accurate unlocking is performed. Unlock control becomes possible.

The keyless entry device according to claim 3 is
Since the battery is used as the power source of the portable transmitter and the personal identification number information is transmitted intermittently, the portable transmitter can operate for a long time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a keyless entry device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a keyless entry device of the present invention. In FIG. 1, this example uses weak radio waves, and is roughly configured by a key or key holder type transmitter 1 and a controller 2 mounted in a vehicle. The transmitter 1 has an ID for generating an individual identification number (ID) signal unique to this device.
It has a generation unit 5, an intermittent transmission unit 6 for transmitting a high frequency signal (transmission power) for intermittently transmitting this ID, and an antenna 7 for transmitting the high frequency signal from this intermittent transmission unit 6 by radio wave. There is.

The controller 2 demodulates the antenna 8 for receiving the transmission signal (weak radio wave) from the transmitter 1, the ID signal from the transmitter 1 based on the reception signal from the antenna 8, and the demodulated ID. It has a receiving unit 9 that makes a comparison with an ID stored in advance and an actuator 10 that locks or unlocks the door with a lock signal or an unlock signal from the receiving unit 9.

FIG. 2 is a block diagram showing a configuration example of the receiving section 9 of the controller 2. In FIG. 2, in this example, for example, a high-frequency processing unit 12 that outputs a high-frequency amplified and frequency-converted intermediate frequency (IF) signal, a demodulation unit 13 that demodulates an ID from the IF signal, and an ID is stored in advance. Memory 14, the comparison unit 15 that compares the demodulated ID from the demodulation unit 13 with the ID stored in the memory 14, and performs the determination, and the lock signal or unlock signal from the comparison unit 15. The drive unit 16 generates and outputs a drive signal for driving the actuator 10.

Next, the operation of this embodiment will be described. FIG. 3 is a diagram showing a transmission state, and FIG. 4 is a flow chart showing a processing procedure in the operation of this embodiment.

1 to 3, the transmitter 1 has an ID
The generator 5 generates an ID signal unique to the device. This ID signal is output to the intermittent transmission unit 6. The intermittent transmission unit 6 intermittently transmits the ID through the antenna 7 as a weak radio wave at time T in FIG. This intermittent transmission enables operation with a power supply battery (not shown) for a long time. This radio wave is received by the antenna 8 of the controller 2. The high frequency processing unit 12 and the demodulation unit 1 of the receiving unit 9 based on the received signal.
The ID transmitted by the transmitter 1 is demodulated through 3. The demodulated ID is compared by the comparison unit 15 with the ID stored in advance in the memory 14 (step S10). If there is no match in step S10 (No), this determination is repeated,
If they match (Yes), the unlock signal is sent to the drive unit 16.
To the actuator 10 to control the door of the vehicle equipped with this device to be unlocked (step S
11). That is, the demodulated ID and the previously stored I
If D matches, the received electric field strength at the time of reception by the antenna 8 is strong, and the user is approaching the door of the vehicle, and it is assumed that the door of the vehicle is unlocked.
Do that action. Next, the ID demodulated in the unlocked state is compared with the ID stored in advance (step S1).
2). If they match in step S12 (Yes),
This determination is repeated, and if they do not match (No), a lock signal is output to the actuator 10 to lock the door of the automobile equipped with this device (step S13). That is, when the demodulated ID and the prestored ID do not match, the received electric field strength is weak and the user has left the door of the vehicle. The operation is performed (step S14).

Thus, in this embodiment, the demodulated I
When D is compared with the ID stored in advance and the received electric field strength is high and the user approaches the door of the vehicle, the door of the vehicle is unlocked. If the ID demodulated thereafter does not match the ID stored in advance, the received electric field strength is weak and the user has left the door of the vehicle, and the door of the vehicle is locked. Therefore, as described in the conventional example, the door can be locked or unlocked without pressing the lock SW or the unlock SW, and the operation can be performed even when both hands are occupied. .

FIG. 5 is a block diagram showing another example of the configuration of the receiving section 9 of the controller 2. 5, in this example, the level of the IF signal output from the high frequency processing unit 12 is compared with a reference voltage (threshold) VE by a comparator 18 in the configuration shown in FIG. That is, when the radio wave from the transmitter 1 received by the antenna 8 has a predetermined electric field strength or more, the demodulation unit 13 is allowed to output the demodulated ID. As a result, unlock control is performed when the ID demodulated by the controller 2 matches the ID stored in advance and the received electric field strength is equal to or higher than a predetermined value. Therefore, the unlock control can be simply not performed when the ID is obtained, and more accurate unlock control can be performed. Regardless of this configuration, for example, a switch for sending / not sending (on / off) the demodulated ID signal to the comparison unit 15 may be used.

[0022]

As is apparent from the above description, according to the keyless entry device of the first aspect, when the personal identification number demodulated by the controller and the pre-stored personal identification number match, the portable device is carried. Since the received electric field strength of the transmission signal (radio wave) from the transmitter is strong and the user is approaching the door of the car equipped with the controller, the door is unlocked. If they do not match, the portable transmitter is used. Since the electric field strength of the received signal (radio wave) from the device is weak and the user is away from the door of the vehicle equipped with the controller and the door is locked, the manual operation of locking or unlocking is unnecessary. Therefore, the door can be automatically locked or unlocked.

According to the keyless entry device of the second aspect, when the received electric field strength of the transmission signal from the portable transmitter is equal to or more than a predetermined value, the demodulated individual personal identification number is transmitted to perform the unlock control. , The personal identification number demodulated by the controller matches the personal identification number stored in advance,
In addition, since the unlock control is performed when the strong reception electric field strength is equal to or higher than the predetermined value, there is an effect that more accurate unlock control can be performed.

According to the keyless entry device of the third aspect, since the battery is used as the power source of the portable transmitter and the personal identification number information is intermittently transmitted, the portable transmitter can be operated for a long time. Has the effect of becoming.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a keyless entry device of the present invention.

FIG. 2 is a block diagram showing a configuration example of a receiving unit in the embodiment.

FIG. 3 is a timing chart showing a transmission state in the embodiment.

FIG. 4 is a flowchart showing a processing procedure in the embodiment.

FIG. 5 is a block diagram showing another configuration example of the receiving unit in the same embodiment.

FIG. 6 is a block diagram showing a configuration of a conventional keyless entry device.

[Explanation of symbols]

 1 transmitter 2 controller 5 ID generator 6 intermittent transmitter 7, 8 antenna 9 receiver 10 actuator 18 comparator

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G08B 15/00 9419-2E G08B 15/00 H04Q 9/00 301 H04Q 9/00 301B

Claims (3)

[Claims] 1. A portable transmitter for remotely controlling lock or unlock of a door, and a controller for controlling lock or unlock of a door by a transmission signal from the portable transmitter. Is provided with a wireless transmission means for wirelessly transmitting individual personal identification number information unique to this apparatus, and the controller receives the transmission signal from the portable transmitter and demodulates the individual personal identification number information, and Storage means for storing individual personal identification number information in advance, comparing means for comparing the individual personal identification number received by the receiving means with the individual personal identification number stored in the storage means, and the individual personal identification number received by the comparing means And a door opening / closing control unit that controls unlocking when the stored personal identification number matches and locks when the stored personal identification number does not match. Keyless entry device. 2. The receiving means includes a high frequency processing unit for processing a wireless reception signal, a demodulation unit for demodulating individual personal identification number information from a signal output from the high frequency processing unit, and a transmission signal from the portable transmitter. Comparing means for comparing the output signal level of the high-frequency processing unit with a preset threshold value in order to judge whether the received electric field strength is above or below a predetermined value, and outputs the comparison value signal when it is above the predetermined value. 2. The keyless entry device according to claim 1, further comprising: a signal ON / OFF unit for transmitting a demodulation signal of the demodulation unit according to a comparison value signal from the comparison unit. 3. The keyless entry device according to claim 1, wherein the portable transmitter uses a battery as a power source, and the wireless transmission means intermittently transmits the personal identification number information.