JPH11125042A - Electronic lock controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to smoothly operate a lock device by using electromagnetic wave signals even under a poor environment for receiving electromagnetic wave. SOLUTION: Normally, electromagnetic wave containing a first code signal 11 and a second code signal 12 is received, and a control signal to a lock device 5 is generated when both of the first code signal 11 and the second code signal 12 are confirmed to be predetermined code signals. In a poor receiving state, if both the first code signal 11 and the second code signal 12 are not confirmed to be predetermined signals or either the first code signal 11 or second code signal 12 are confirmed to be the predetermined code signal, then the switching counter is advanced. When the switching counter counts a value higher than the predetermined value and either the first code signal 11 or the second code signal 12 verifies the predetermined code signal, then a control signal to the lock device 5 will be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic control of a lock device, and more particularly to an electronic lock control device which can be operated smoothly even in an environment where an electromagnetic wave signal is difficult to receive.

[0002]

2. Description of the Related Art For example, Japanese Patent Publication No. 7-76497 discloses a keyless entry device for controlling the locking of a door or a trunk of a vehicle by transmitting electromagnetic waves such as radio waves from a transmitter outside the vehicle to a receiver of the vehicle. ing. In this keyless entry device, an electromagnetic wave carrying an ID code is transmitted from a transmitter by a single switch operation, and an electromagnetic wave carrying the ID code is received on the receiver side by a single antenna set in a reception area for a door. When the received ID code and the vehicle code match, the reception area of the antenna is switched from the door reception area extending all around the vehicle to the trunk reception area limited to the vicinity of the trunk. If there is a reception output of a predetermined level or more in the reception area for the door and a reception output of a predetermined level or more in the reception area for the trunk, the locking of the trunk is controlled. When there is a reception output of a predetermined level or more only in the door reception area, the door lock is controlled. As described above, by switching the receiving sensitivities of a plurality of receiving areas, the configuration of the system can be simplified, and the design time and cost can be reduced.

[0003]

By the way, when the lock device is controlled via radio waves, a receiver placed in an environment where radio waves are easily received operates normally, but is placed in an environment where radio waves are difficult to receive. The condition that the receiver does not operate smoothly is a phenomenon that is usually recognized. When controlling the lock device via radio waves, the transmitter transmits radio waves including at least two code signals, and when the receiver detects that the radio waves including the two code signals have been reliably received, the receiver It is desirable to operate the locking device by the output of the motor to obtain the certainty of operation. However, unless the radio wave reception environment is good, it is difficult to reliably detect that the radio wave including the two code signals has been received by the receiver, and therefore, there is a disadvantage that the lock device cannot be operated.

An object of the present invention is to provide an electronic lock control device which can be operated smoothly even in a poor electromagnetic wave reception environment.

[0005]

An electronic lock control device according to the present invention receives an electromagnetic wave signal including at least a first code signal and a second code signal, and receives the first code signal and the second code signal. Generate a control signal to the lock device when it is determined that each of them is a predetermined code signal. When either the first code signal and the second code signal cannot be confirmed to be the predetermined code signal, or when one of the first code signal and the second code signal confirms the predetermined code signal, Increment the switching counter. The switching counter counts a predetermined value or more and generates a control signal to the lock device when one of the first code signal and the second code signal is confirmed to be the predetermined code signal.

Normally, when it is confirmed that both the first code signal and the second code signal are predetermined code signals, a control signal to the lock device is generated. By generating a control signal to the lock device when one of the code signals confirms the predetermined code signal and the predetermined number of times, the lock device can be smoothly operated even in an unfavorable electromagnetic wave reception environment.

In the embodiment of the present invention, when it is confirmed that both the first code signal and the second code signal are predetermined code signals, the match counter is advanced, and the match counter counts the predetermined number of matches. When counting, the switching counter is cleared. When confirming that both the first code signal and the second code signal are predetermined code signals,
Clearing the switching counter when the match counter has counted a predetermined number of matches after the match counter has been incremented. By clearing the switching counter, it is possible to cope with a use state in a favorable electromagnetic wave reception environment.

In another embodiment of the present invention, when the first code signal or the second code signal cannot be confirmed as a predetermined code signal, the coincidence counter is cleared. When a control signal to the lock device is generated after the switching counter has counted a predetermined value, the mismatch counter is cleared.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic lock control device according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, an electronic lock control device 1 according to the present invention processes a receiving circuit 2 having an antenna 2a for receiving a radio wave generated from a transmitter 6, and processes an output of the receiving circuit 2. A lock control circuit 3 for generating a control signal when an electromagnetic wave signal from the transmitter 6 includes a predetermined code signal; a lock drive circuit 4 driven by an output of the lock control circuit 3; And a lock device 5 operated by the controller.

The transmitter 6 includes a code signal storage circuit 7, an activation switch 8, a signal generation circuit 9 for receiving a signal from the code signal storage circuit 7 when the activation switch 8 is operated, and generating a code signal. And a transmission circuit 10 for carrying a code signal formed by the signal generation circuit 9 from an antenna 10a. As shown in FIG. 2, the code signal formed by the signal generation circuit 9 is composed of, for example, a 7-digit first code signal 11 and a 7-digit second code signal 12, which are transmitted in series. Including. First code signal 1
The first and second code signals 12 may be the same code signal,
Different code signals may be used.

Although not shown, the lock control circuit 3 compares a code signal storage circuit for storing a predetermined code signal with the first code signal 11 and compares the code signal stored in the code signal storage circuit with the first code signal 11. A first comparison circuit that generates an output when the two match, a code signal stored in the code signal storage circuit and the second code signal 12 are compared,
A second comparing circuit that generates an output when they match, and counts the number of times that the first code signal cannot be confirmed to be the predetermined code signal, or the second code signal is the predetermined code signal A non-coincidence counter that counts the number of times that the first code signal and the second code signal cannot be confirmed; a coincidence counter that counts the number of times each of the first code signal and the second code signal matches the stored code signal; In the good reception state in which the unlocking is performed when any of the code signals matches the stored code signal, and the unlocking is performed when either the first code signal or the second code signal matches the stored code signal. A switching counter for switching between a locked bad reception state.

When the start switch 8 of the transmitter 6 is turned on, the signal generation circuit 9 reads a code signal from the code signal storage circuit 7 and sends it to the transmission circuit 10. The transmission circuit 10 transmits a radio wave including the first code signal 11 and the second code signal 12 shown in FIG. 2 from the antenna 10a.
When receiving a radio wave from the transmitter 6 by the receiving circuit 2 having the antenna 2a, the electronic lock control device 1 transmits the received signal to the lock control circuit 3;
Are operated according to the operation sequence shown in the flowchart of FIG.

In FIG. 3, the process proceeds from the start to step 20, and after the counters are cleared, the process proceeds from step 20 to step 2.
Proceeding to 1, the lock control circuit 3 determines whether the receiving circuit 2 has received a radio wave. When a radio wave is received in step 21, in step 22, the first comparison circuit
It is determined whether or not the code signal 11 coincides with the code signal stored in the code signal storage circuit. If they match, the process proceeds to step 23; if they do not match, step 29
After incrementing the mismatch counter by adding 1, the process proceeds to step 23. In step 23, the second comparison circuit determines whether or not the second code signal 12 matches the code signal stored in the code signal storage circuit. If they match, the process proceeds to step 24. If they do not match, 1 is added in step 30 to advance the mismatch counter, and then the process proceeds to step 24.

In step 24, it is determined whether or not the mismatch counter is 0. If it is 0, the process proceeds to step 25, where the lock control circuit 3 sends an output to the lock drive circuit 4 to operate the lock device 5. That is, when the lock device 5 is in the locked state, it is switched to the unlocked state, and when it is in the unlocked state, it is switched to the locked state. Then, step 26
The lock control circuit 3 proceeds to step 27 and increments the match counter by one.
It is determined whether or not has been counted. If the coincidence counter 3 is equal to 3, the switching counter is cleared in step 28, and then the process returns to step 21. If the match counter does not reach 3 in step 27, the process returns to step 21.

In step 24, the mismatch counter is set to 0.
If not, the process proceeds to step 31 to clear the coincidence counter, proceeds to step 32, increments the switching counter by 1 and progresses, and then proceeds to step 33. Step 33
Then, the lock control circuit 3 determines whether the count value of the mismatch counter is 1 or not, and when the count value is 1, proceeds to step 34,
It is determined whether the count value of the switching counter is equal to or greater than a predetermined value of 4. In step 34, when the count value of the switching counter is equal to or greater than 4, the process proceeds to step 35 in the bad reception state, where the lock control circuit 3 sends an output to the lock drive circuit 4 to operate the lock device 5. Thereafter, the process proceeds to step 36, where the mismatch counter is cleared, and the process returns to step 21. Step 35
Then, when the lock device 5 is in the locked state, it is switched to the unlocked state, and when it is in the unlocked state, it is switched to the locked state. When the mismatch counter is 2 instead of 1 in step 33, and when the switching counter is less than 4 in step 34, the process proceeds to step 36.

That is, in this embodiment, normally, when it is confirmed that both the first code signal 11 and the second code signal 12 are predetermined code signals, a control signal to the lock device 5 is generated. However, if the first code signal 11 or the second code signal 12 is not a predetermined code signal, the match counter is cleared, and after confirming this state three or more times, one of the predetermined codes is changed. When it is confirmed, the lock device 5 is recognized as being in a bad reception state, and a control signal to the lock device 5 can be generated, so that the lock device 5 can be smoothly operated even in an unfavorable electromagnetic wave reception environment. If the number of times the first code signal 11 and the second code signal 12 also coincide with each other reaches three times, it is determined that the reception is good and the switching counter is cleared. First code signal 1
When none of the first and second code signals 12 can be confirmed as a predetermined code signal, or when either one of the first code signal 11 and the second code signal 12 is confirmed as a predetermined code signal, the confirmation is performed. When the number of times does not reach the predetermined number, no control signal to the lock device 5 is generated.

The embodiments of the present invention can be modified.
For example, instead of using radio waves as electromagnetic waves, light such as infrared light or visible light may be used. Third or more code signals may be used.

[0019]

According to the present invention, the lock device can be smoothly operated by using the electromagnetic wave signal even in an unfavorable electromagnetic wave reception environment, so that there is an advantage that trouble can be avoided when the lock device is used.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an electronic lock control device according to the present invention.

FIG. 2 is a waveform diagram of an electromagnetic wave signal used in the electronic lock control device.

FIG. 3 is a flowchart showing an operation sequence of a lock control circuit of the electronic lock control device.

[Explanation of symbols]

1. Electronic lock control device 2. Receiving circuit 2a
..Antennas, 3 lock control circuits, 4 lock drive circuits, 5 lock devices, 6 transmitters
11... The first code signal, 12... The second code signal,

Claims (4)

[Claims] When receiving an electromagnetic wave signal including at least a first code signal and a second code signal and confirming that both the first code signal and the second code signal are predetermined code signals. An electronic lock control device that generates a control signal to the lock device when the first code signal and the second code signal cannot both be determined to be predetermined code signals, or when the first code signal and the second code signal cannot be confirmed. When it is confirmed that one of the code signals is a predetermined code signal, the switching counter is incremented, the switching counter counts a predetermined value or more, and one of the first code signal and the second code signal is a predetermined code signal. An electronic lock control device that generates a control signal to the lock device when confirmed as a code signal. 2. A coincidence counter is advanced when it is confirmed that both the first code signal and the second code signal are predetermined code signals, and when a coincidence counter has counted a predetermined number of coincidences, a switching counter is provided. 2. The electronic lock control device according to claim 1, wherein: 3. The electronic lock control device according to claim 2, wherein the coincidence counter is cleared when the first code signal or the second code signal cannot be confirmed as a predetermined code signal. 4. After the switching counter has counted a predetermined value,
3. The electronic lock control device according to claim 2, wherein a mismatch counter is cleared when a control signal to the lock device is generated.