JP2656502B2 - Radio key system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a radio wave transmitted to and from a portable key transceiver by a locking and unlocking control device that controls locking and unlocking of a locking device provided at or near a door. The present invention relates to a radio-wave key system for performing locking and unlocking of a lock device when the communication is properly performed.

[Problems to be solved by conventional technology and invention]

Conventionally, as a key system of this type, when a lock operation button and an unlock operation button provided near the lock device are operated, a request signal of a predetermined code is transmitted from the lock / unlock control device to the key transceiver by radio waves, The key transceiver receiving the request signal returns a predetermined key code signal by radio wave,
There is a lock / unlock control device that receives the key code signal, performs a predetermined collation, and locks / unlocks the lock device if the collation matches.

To perform the above communication, the transmission / reception antenna on the locking / unlocking control device side is accommodated in, for example, an intercom provided near the door, the transmission / reception antenna on the key transceiver side is accommodated in the case of the key transceiver, Can communicate with each other when is within about 1m.

By the way, when going out, there is a case where the user operates the locking / unlocking operation button while forgetting to possess the key transceiver. In such a case, if the forgotten key transceiver is placed inside the door near the location where the transmission / reception antenna on the locking / unlocking control device side is provided, a predetermined distance is established between the locking / unlocking control device and the key transceiver. Is performed, and the locking device is locked. The locked state is notified to the operator by the display, so that the operator can go to the place where he / she is going with peace of mind.

If the key transceiver is misplaced in the state described above, the lock device will be unlocked regardless of who operates the unlocking button, which is not preferable for theft, but possesses the key transceiver. Even if you don't, you won't be stuck in the house when you're away. However, if a person at home possesses a misplaced key transceiver and goes out afterwards, even if a person who went out earlier without possessing the key transceiver tries to return home and enter the house, the lock The device cannot be unlocked.

In view of the above-described problems, the present invention provides a radio-frequency key system that can notify an operator that a lock device has been locked / unlocked despite having performed a lock / unlock operation without possessing a key transceiver. It is intended to provide.

[Means for solving the problem]

In order to solve the above-mentioned problems, the radio key system according to the present invention comprises a portable key transceiver 13 for returning a key code signal in response to a request signal, as shown in the basic configuration diagram of FIG. A request signal transmitting means 121a for transmitting a request signal in response to an operation of the locking / unlocking operation means 5, 6 provided outside the house, and a key code signal receiving for receiving a key code signal returned from the key transceiver. Means 121b, and a comparing means 121c for comparing the code of the received key code signal with a preset code, and detecting that both codes are coincident with each other. Control device 12 for locking and unlocking 3
In the radio key system comprising: the key transceiver, only when it is in the vicinity of the control device, can communicate with the request signal transmitting means and the key code signal receiving means by radio waves, the control device A timer means 121d which starts counting a predetermined time upon detection of a match by the comparing means immediately after the operation of the locking / unlocking operation means, and a lock / unlock state of the locking device, which is provided outside the house together with the locking / unlocking operation means. Indicator indicated by 7,
8, the transmission control means 121e for transmitting the request signal to the request signal transmission means a fixed time after the indicator is turned on while the timer means is counting, and the comparison means immediately after the operation of the locking and unlocking operation means. The indicator is turned on by the detection, and the control unit detects the coincidence between the code of the key code signal received according to the request signal transmitted by the request signal transmitting unit and the preset code under the control of the transmission control unit. When the indicator which has been turned on is turned off for a certain period of time and then turned on again, and when a match between the two codes is not detected, the indicator control means 121f which turns off the indicator which has been turned on until then is further provided. It is characterized by.

(Operation)

With the above configuration, the locking devices 2 and 3 are locked and unlocked by the operation of the locking and unlocking operation means 5 and 6, and the state is displayed by turning on the indicators 7 and 8, and thereafter, at regular intervals during the counting of the timer means 121d. Transmission control means 121e is a request signal transmission means
The request signal is transmitted to the key code receiving unit 121b, and the key code receiving unit 121b receives the key code signal returned from the key transceiver 13 in response to the transmission of the request signal. When the transmission control means 121e causes the request signal transmission means 121a to transmit the request signal, the indicator control means 121f turns off the lit indicators 7,8. And these once turned off indicators 7,8
Compares the code of the key code signal received by the key code receiving means 121b with a preset code,
Is turned on again when is detected. Therefore, the timer means 12
During a certain period of time determined by 1d, the indicators 7, 8 are blinked at regular intervals while the above-mentioned communication is performed normally, and if the communication cannot be performed halfway, the indicators 7, 8 are turned off even during the measurement of the above-mentioned certain period of time.

As a result, when the locking / unlocking operator carrying the key transceiver 13 performs the locking / unlocking operation, the indicator flashes after the operation, and the indicator turns off when the user moves away from the door. On the other hand, if the key transceiver 13 is left behind in the communicable place inside the door and the locking operation is performed, even if the locking / unlocking operator leaves the door, the indicator continues to blink for a certain period of time and goes out. There is no.

〔Example〕

An embodiment of a radio key system according to the present invention applied to a door lock of a house will be described below with reference to FIGS.

FIG. 2 is a diagram showing a schematic configuration of the radio key system, in which unlocking of a locking rod (not shown) adjacent to a lock (not shown) of the door 1 of the house is performed. A solenoid 2 for locking and a locking motor 3 for performing a locking operation are provided. An unlocking operation button 5 and a locking operation button 6 as locking and unlocking operation means are arranged adjacent to an intercom 4 provided near the door 1.

At the center of these buttons, as shown in FIG. 3, an unlocking indicator 7 and a locking indicator 8, each of which is formed by an LED, for example, are provided to indicate the respective states. In a case 9 in which the buttons 5 and 6 are arranged on the surface, a transmission / reception bar antenna 10 and a warning buzzer 11 are incorporated. The unlocking solenoid 2, the locking motor 3, the switches (not shown) operated by the unlocking operation buttons 5 and 6, the indicators 7 and 8, the bar antenna 10 and the buzzer 11 are provided inside the house. Interconnected with the locking and unlocking control device 12 to be operated.

Reference numeral 13 denotes a key transceiver that can be carried by the owner in a pocket or the like instead of the mechanical key of the lock of the house, and its power is always on.

Although not shown in FIG. 2, a door lock state detection switch for detecting a door lock state and a door open / close detection switch for detecting a door open / close state are also provided. It is connected to the.

As shown in FIG. 4, the lock / unlock control device 12 includes a microcomputer (hereinafter abbreviated as CPU) 121 partly operating according to a predetermined program. The CPU 121 has output ports O _{1 to} O ₁₀ and input port I ₁
~I ₆ has etc., to the output port O ₁ ~ O _5, the output circuit 122
Solution through the lock solenoid 2, for locking the motor 3, the unlocking indicator 7, the locking indicator 8 and the buzzer 11 are connected respectively to the input ports I ₁ ~I _4, the door lock state detector via an input circuit 124 A switch, a door open / close detection switch, a lock switch, and an unlock switch are respectively connected. A memory 124 storing various codes is connected to the output ports O ₆ and O ₇ and the input port I ₅ .

Oscillation output ports O ₉ and O ₁₀ circuit 125 and the modulation circuit 12
6 are connected to each other, and when the output port O ₉ becomes H level, the oscillation circuit 125 starts oscillating. The modulation circuit 126 which inputs the output signal from the oscillation circuit 125 as a carrier is a request code signal from the output port O _10. Modulates the carrier. After the modulated carrier is amplified by the amplifier circuit 127, it is sent to the transmission / reception bar antenna 9 and emitted as a request signal.

The output ports O ₉ and O ₁₀ , the oscillation circuit 125, the modulation circuit 126, and the amplification circuit 127 transmit a request signal in response to the operation of the unlock operation button 5 and the lock operation button 6 provided outside the house. The request signal transmission unit 121a is included.

A key code signal received by the transmission / reception bar antenna 9 and demodulated by the demodulation circuit 128 is input to the input port I ₆ . The demodulation circuit 128 includes a high frequency amplification circuit 128a, a ceramic filter 128b, an intermediate frequency amplification circuit (IF AMP) 128c, and a comparator 128d.

Incidentally, the intermediate frequency amplifying circuit (IF AMP) 128c and the input port I ₆ constitute a key code signal receiving means 121b for receiving a key code signal sent back from the key transceiver 13.

The output port O _8, is connected the collector to the base of the switching transistor Q _1, the base of the switching transistor Q ₂ to which the emitter is connected is connected to ground. Also to the base of the switching transistor Q _1, a diode D _1, and D ₂ to have been normally open lock switch and the unlock switch is connected via respectively, lock switch or the unlock switch is locking operation buttons 6 or unlocking When turned on by operating the operation button 6, the transistor Q ₁ is turned on and supplies a power supply voltage of +12 V to the regulator 129.

The regulator 129 supplies the stabilized power supply voltage to the port _VDD of the CPU 121. Reset signal rise of the output is generated is differentiated by the differentiation capacitor C ₁ is supplied to the support RST, CPU 121 is in the standby state. Crystal oscillator for clock generation at ports CL ₁ and CL ₂
130 is connected.

On the other hand, as shown in FIG.
CPU1 part of which operates according to a predetermined program
31. CPU 131 has output ports O _{1 to} O ₇ ,
Has an input port I ₁ ~I _3, the output ports O ₁ and O ₂ is connected an oscillation circuit 132 and the modulation circuit 133, an output port O ₄
And the O ₅ and the input port I ₂ is connected to a memory 134 in which various codes are stored. Oscillation circuit 132 starts oscillating by the output port O ₁ becomes H level, and supplies its output to the modulation circuit 133. The modulation circuit 133 is an oscillation circuit
The output signal from the 132 as a carrier, the transistor is modulated by the key code signal from the output port O ₂ of this
It is applied to the base of Q _3. Transistor Q ₃ are driven by the modulated carrier by a key code signal, it emits a key code signal via the transmitting and receiving bar antenna 135 connected to its collector.

The transmission / reception bar antenna 135 receives the request signal and supplies it to the demodulation circuit 136. The demodulation circuit 136 is composed of a detection circuit 136a and the operational amplifier 136 b, and supplies the request signal demodulated into the input port I ₁ of the CPU 131. Demodulation circuit
The output of 136 is being also applied to the control input of the electronic switch SW _1, switch SW ₁ when the output of the demodulation circuit 136 rises is turned on, the port RST of CPU131 battery 137 through the capacitor C ₂
To reset the CPU 131 to the standby state. The control input of the switch SW ₁ is also connected the output port O _3.

The output port O ₆ and O _7, the control terminal of each supplied electronic switches SW ₂ and SW ₃ to the power supply voltage of the battery 137 memory 134 and the low voltage detector 138 are connected respectively, low to the input port I ₃ The output of the voltage detector 138 is connected.
Low voltage detector 138 checks the voltage divided by the voltage dividing resistors R ₁ and R _2, the voltage of the battery 137 is detected to be decreased.

In the above configuration, the CPU 121 of the locking and unlocking control device 12
The flowcharts of FIGS. 6 (a) and 6 (b) are executed according to a predetermined program to perform a predetermined operation.

That is, the locking operation buttons 5 or locking operation button 6 is connected unlock switch or lock switch when turned on, the power supply voltage stabilized by the regulator 129 the transistor Q ₁ is being turned on is supplied to the port V _DD At the same time, a reset signal is applied to the port RST. This allows the CPU 121
There becomes a standby state, and starts execution of the flow chart, the output port O ₈ to H level to turn on the transistor Q _2. By turning on the transistor Q _2, be solved is on the unlock switch or lock switch, the transistor Q ₁ is kept ON state, supply of power supply voltage to the port V _DD is maintained.

First, in the first step S1, it is determined whether or not a power failure has occurred based on the state of an input port (not shown). Step S2 when the determination at power failure is YES, the determining the states of the input ports I ₃ here whether lock switch is ON or. When the determination is YES, that is, when a power failure occurs and the lock switch is on, the CPU 121 sets all output ports to L level to enter the stop mode, and stops the operation of the system. As a result, the locking operation is not performed in the power failure state even if the locking operation is performed. At the time of power failure, the operation is performed by a backup power supply (not shown).

When the determination in step S1 is NO, that is, when there is no power failure, or when the determination in step S2 is NO, that is, when the locking operation is not performed, the process proceeds to step S3. Step S3
In detects the state of the door lock state detection switch by the input port I _1, the door is determined whether the locked state. When the door is locked and the judgment is YES,
The output port O ₃ proceeds to step S4 in the H level turns on the lock indicator 7, the door is determined not in a locked state
When NO, the output port O ₄ proceeds to step S5 to turn on the unlocking indicator 8 in the H level.

Then the process proceeds to step S6, where by the output port O ₅ in a predetermined time period (e.g., 0.1 sec) H level to drive the meantime buzzer 11, for example, sound the sound of 3 KHz. Then step S7
The process proceeds, wherein detecting the state of the door opening and closing detection switch by the input port I _2, the door is equal to or closed.
If the door is open and the determination is NO, step S8
Proceeds to here by the output port O ₅ to 6 times the H level at 0.2 second intervals to drive the buzzer 11, the door by sound intermittent sound 3KHz to warn that it is in an open state. When the door is closed and the determination is YES, the process proceeds to step S9.

In step S9, the output port O ₉ with starting the oscillation to the oscillator circuit 125 to H level, reads out the code signal of the normal key for the request signal from the memory 124 by sequentially outputting this from the output port O ₁₀ Then, a normal key request signal is transmitted from the transmission / reception bar antenna 9, and then the process proceeds to step S10.

In step S10, determines the signal whether it has received the key code signal from the key transceiver 13, which is received by the reception bar antenna 9 is input to the input port I ₆ after being demodulated by the demodulation circuit 128 . When the key code signal is received and the determination is YES, the process proceeds to step S11, where the normal key code stored in the memory 124 is read, and this is compared with the code of the key code signal. Determine whether or not.

When the determination in step S10 is not received NO, that a key code signal, the process proceeds to step S12, where the read code signal of the master key for the request signal from the memory 124, and sequentially outputs it from the output port O ₁₀ As a result, the master key request signal is transmitted from the transmission / reception bar antenna 9, and then the process proceeds to step S13.

In step S13, it is determined whether a key code signal has been received from the key transceiver 13 in the same manner as in step S10. If the determination is NO, the process proceeds to step S14. In step S14, it is determined whether the request signals for the normal key and the master key have been transmitted a predetermined number of times (for example, four times).
It returns to step S9. If the determination in step S13 is YES, it is determined whether the received key code signal matches the master key code read from memory 124.

When the determinations in steps S11 and S15 are NO, the determination in step S14 is performed, and when the determination is YES, the process proceeds to step S21. If the determination in step S14 is YES, step
In S16, drive the buzzer 11 for 0.2 seconds at 5 millisecond intervals,
After emitting a modulated sound obtained by modulating a 3 KHz sound with a 100 Hz signal, the process proceeds to step S31.

In step S21, it is determined whether or not the lock switch is turned on. If the determination is NO, the process proceeds to step S22, where it is determined whether or not the unlock switch is turned on. If the determination in step S22 is NO, the stop mode is set. If the determination is YES, the process proceeds to step S23, where it is determined whether the door is locked. If the determination in step S23 is NO, it is determined in step S2 that the door is locked.
At 4, the buzzer 11 is turned on three times at intervals of 0.2 seconds to warn by emitting a 3KHz sound intermittently. The determination in step S23 is Y
When the ES to the output port I ₁ of the CPU121 in step S25 the H Lehel drives the release solenoid 2, performs unlocking operation, then the process proceeds to step S29.

If the determination in step S21 is YES, step S26
Then, it is determined whether or not the door is locked. If the determination in step S26 is YES, the stop mode is entered after the buzzer 11 is turned on three times at 0.2 second intervals and a 3KHz sound is emitted intermittently in step S27 to warn that the door is locked. . If the determination in step S26 is NO, the process proceeds to step S28, where the output port O of the CPU 121 is
_{2 is set} to the H level, the locking motor 3 is driven to perform the locking operation, and then the process proceeds to step S29.

In step S29, based on the data transmitted together with the key code signal from the key transceiver 13, the key
It is determined whether or not the battery voltage level of the battery has dropped. If the determination is YES, the process proceeds to step S30, and the buzzer 11 is turned on to warn that the battery voltage has dropped and the battery needs to be replaced. When the determination is NO, the process proceeds to step S31.

In step S31, a timer for regulating the lighting time of the indicator 7 or 8 is started, and thereafter, in step S32
Proceed to. In step S32, it is determined whether or not the door is locked. If the determination is NO, the unlock indicator 7 is turned on in step S33. If the determination is YES, the locking indicator 8 is turned on in step S34. Proceed to S35.

In step S35, a 0.5-second timer is started, and a standby state is entered until the timer expires.After 0.5 second has elapsed, the process proceeds to step S36, where it is determined whether or not a power failure has occurred, and if the determination is YES, the process proceeds to step S36. After turning off the unlocking indicator 7 or the locking indicator 8 which is lit in S37, the operation is terminated in the stop mode, and when the determination is NO, the process proceeds to step S38.

In step S38, it is determined whether or not there is an input from the lock switch or the lock switch, and if the determination is YES, the operation up to that point is interrupted to enter the stop mode,
The operation from the first step S1 is restarted, and when the determination is NO, the process proceeds to step S39. In step S39, a normal request signal is transmitted, and in step S40, the code of the key code signal transmitted from the key transceiver 13 in response to the reception of the normal request signal is compared with the normal key code. Result It is determined whether or not both match. If the determination in step S40 is YES, step S41
After turning off the currently lit indicator 7 or 8 in step S42, the process waits for 0.5 seconds in step S42, and determines in step S43 whether the timer started in step S31 has timed out. If the timer has not timed out and the determination in step 43 is NO, the process returns to step S32, and the above steps are repeatedly executed.

As described above, the indicator 7 or 8 corresponding to the locked state of the door is flashed at 0.5-second intervals until the determination in step S36 or S38 is YES or the determination in step S40 or S43 is NO. If the operator carrying the key transceiver 13 is more than 1 m away from the door while in this blinking state, communication is disabled, the determination in step S40 becomes NO, and the process proceeds to step 44, where the indicator in the blinking state is displayed. After turning off 7 or 8, the stop mode is set. On the other hand, if the operator does not have the key transceiver 13 and has left the key inside the communicable door, the communication will be continued even if the operator is more than 1 m away from the door. The blinking indicator 7 or 8 is not turned off until the determination in step S43 is YES, that is, in step S43.
The blinking is continued until the timer started in S31 expires.

Therefore, the operator knows that the key transceiver has been left in a place where the key transceiver can be communicated because the flashing indicator after the locking / unlocking operation is still flashing even when the operator is away from the door by a predetermined distance. be able to.

As is clear from the description of the operation performed by the CPU 121 with reference to the flowcharts of FIGS. 6A and 6B, the CPU 121 converts the code of the received key code signal and the code set in advance. Comparing means 121c for comparing and detecting that the two codes match, and comparing means immediately after operating the unlocking operation button 5 and the locking operation button 6 as the locking and unlocking operation means
A timer means 121d for starting to measure a predetermined time by detecting a coincidence by 121c; and a request signal transmitting means for a certain time after the indicators 7 and 8 are turned on while the timer means is measuring time.
Transmission control means 121e for transmitting a request signal to 121a
Function as indicator control means 121f. Then, the indicator control means 121f turns on the indicator by the coincidence detection by the comparing means immediately after the operation of the locking / unlocking operation means, and the key received in response to the request signal transmitted by the request signal transmission means 121a under the control of the transmission control means 121e. When the comparing means 121c detects a match between the code of the code signal and the preset code, the indicator that has been lit up until then is turned off for a certain period of time and then turned on again. The indicators 7 and 8 that were turned on are turned off.

The transmission / reception bar antenna 9 of the lock / unlock control device 12 shown in FIG.
Is received by the transmission / reception bar antenna 135 of the key transceiver 13 shown in FIG.

CPU131 key transceiver 13 first detects that the input port I ₁ by the reception of the request signal has become H level 8
In the first step S1, the execution of the flowchart shown in the figure is started, and the code of the input request signal is compared with the request code read from the memory 134 to determine whether or not the two match each other. In the case of, the operation is stopped in the stop mode. When the determination is YES, the process proceeds to step S2, where the state by the battery voltage of the input port I ₃ is equal to or normal, the determination is NO
In the case of, information indicating that the battery is not normal is added to the key code transmitted in step S3, and when the determination is YES, information indicating that the battery is normal is added to the key code transmitted in step S4. After execution of step S3 or S4, proceed to step S5, where the key code is output to the output port.
O ₂ , the oscillation output of the oscillation circuit 132 is modulated by the modulation circuit 133, and a key code signal is transmitted from the transmission / reception bar antenna 135. After the transmission of the key code signal, the mode is set to the stop mode and the operation is stopped.

(Effect)

As described above, according to the present invention, when the locking / unlocking operator has a key transceiver, and when the locking / unlocking operator forgets to place the key inside the communicable door, the indicator for displaying the locking state immediately after the locking operation is lit. Therefore, the indicator that should be turned off when the locking / unlocking operator is away from the door does not turn off even when the locking / unlocking operator is away from the door, and keeps blinking. This makes the locking / unlocking operator aware that he / she does not have a key transceiver and has left the door inside a communicable area inside the door, and may leave the door with the key locked. It will be prevented before it happens.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a radio key system according to the present invention, FIG. 2 is a perspective view showing an example of use of a radio key system according to the present invention, and FIG. 3 is a part of FIG. Enlarged perspective view, FIG. 4 is a circuit diagram showing a specific example of a lock / unlock control device which is a part in FIG. 2, and FIG. 5 is a circuit diagram showing a specific example of a key transceiver which is a part in FIG. 6 (a) and 6 (b) are diagrams showing a flowchart executed by the CPU in FIG. 4, and FIG. 7 is a diagram showing a flowchart executed by the CPU in FIG. 5, 6 locking / unlocking operation means, 12 control device, 121a request signal transmission means, 13 key transceiver, 121b
Key code signal receiving means, 121c ... Comparing means, 2,3 ...
Locking device, 7,8 ... indicator, 121d ... timer means, 1
21e ... transmission control means, 121f ... indicator control means.

Claims (1)

(57) [Claims] 1. A portable key transceiver for returning a key code signal in response to receiving a request signal, and a request signal transmitting means for transmitting a request signal in response to an operation of a locking / unlocking operation means provided outside the house. And a key code signal receiving means for receiving a key code signal returned from the key transceiver, and comparing the code of the received key code signal with a preset code, and that both codes match. Comparing means for detecting
A radio key system including a control device for locking and unlocking the lock device by detecting the coincidence of the two codes, wherein the request signal transmission means and the key code signal reception are performed only when the key transceiver is near the control device. Means for communicating with the means by radio waves, the control device comprising: a timer means for starting time measurement of a predetermined time by a coincidence detection by the comparing means immediately after the operation of the locking and unlocking means; and the outside of the house together with the locking and unlocking means. And an indicator for instructing the locking / unlocking state of the lock device by lighting, and a transmission control means for transmitting a request signal to the request signal transmitting means a fixed time after the lighting of the indicator during counting of the timer means. The indicator is detected by the coincidence detection by the comparing means immediately after the operation of the locking and unlocking operation means. When the comparison means detects that the code of the key code signal received in response to the request signal transmitted by the request signal transmission means under the control of the transmission control means matches a preset code, the light is lit up to that time. An indicator control means for turning off the indicator which has been turned on for a certain period of time, turning on the indicator again for a certain period of time, and turning off the indicator which has been turned on until then, when a match between the two codes is not detected. Key system.