JPH0436611B2 - - Google Patents

Description

[Detailed description of the invention] Technical field The present invention relates to a receiver operation control device.

BACKGROUND ART For example, when the lock mechanism of a car door and the opening/closing operation of a trunk lock are remotely controlled using control signals such as weak radio waves or light beams emitted from a portable transmitter, when the car is in a garage, Alternatively, when no one is inside the vehicle, such as when the vehicle is parked, the receiver must remain energized and wait for a control signal from the transmitter.

However, since the receiver's power is supplied from the storage battery, even if the receiver's power consumption is small,
Since it is required to supply power for a long period of time, the power consumption of the receiver cannot be ignored for storage batteries.

Therefore, as a method of reducing the average power consumption of the receiver, a method of connecting the power supply intermittently is known. Using this type of intermittent reception method certainly reduces the average power consumption compared to when the power is turned on continuously, but if the power is turned off by chance,
When a control signal is emitted from a transmitter, there is a delay in control operation until the receiver is next connected to power, making it difficult to use.

Problems to be Solved by the Invention An object of the present invention is to provide a receiver operation control device that reduces the power consumption of the receiver and has improved usability.

Means for Solving the Problems The present invention provides an operation control device for a receiver that receives a transmission signal from a transmitter and controls electronic equipment installed in an automobile according to the signal, in which the transmission signal is not detected. means for performing an intermittent reception operation by alternately repeating an activation time in which the receiver is activated and placed in a receiving state and a deactivation time in which it is deactivated and placed in a resting state; and a predetermined device of the vehicle is operated. and a control means for setting a reception state in which activation time is longer than the intermittent reception operation for a certain period of time after the detection means detects that a predetermined device of the vehicle has been operated. This is a receiver operation control device characterized by the following.

The present invention also provides an operation control device for a receiver that receives a transmission signal from a transmitter and controls electronic equipment installed in a vehicle in accordance with the signal, which activates the receiver when the transmission signal is not detected. means for performing an intermittent reception operation by alternately repeating an activation time in which the vehicle is activated and placed in a receiving state, and a deactivation time in which the vehicle is deactivated and placed in a resting state; and a detection device that detects that a predetermined device of the vehicle is operated. means, and if the detection means detects that a predetermined device of the vehicle has been operated, a reception state is set in which the activation time is longer than the intermittent reception operation, and the activation time is shortened according to the elapsed time. An operation control device for a receiver, characterized in that it includes a control means for setting the receiver to the intermittent reception operation state.

In a preferred embodiment, the detection means is means for detecting that the key is removed from the ignition key cylinder of the automobile.

Further, in a preferred embodiment, the detection means includes:
The present invention is characterized in that it is a means for detecting opening and closing of an automobile door.

In a preferred embodiment, the transmitter transmits a signal including a recognition code, and the receiver controls the electronic device when the recognition code of the received signal matches a predetermined recognition code,
The detection means is characterized in that it is a detection means for detecting that the recognition code of the signal received by the receiver matches a predetermined recognition code.

Effect According to the present invention, when the detection means detects that a predetermined device of the automobile has been operated, the reception state is controlled for a certain period of time to a reception state in which activation time is longer than the intermittent reception operation when no transmission signal is detected. . This makes it possible to suppress a decrease in reception probability when there is a high possibility that a signal will be transmitted from the transmitter.

Further, according to the present invention, when the detection means detects that a predetermined device of the automobile has been operated, the reception state is controlled for a certain period of time to a reception state in which activation time is longer than the intermittent reception operation when no transmission signal is detected. . The activation time is shortened according to the elapsed time, and the intermittent reception state is controlled. With this, it is possible to reduce power consumption as much as possible while suppressing a decrease in reception probability, taking into account the probability of transmission that decreases as time passes since the device in the vehicle was operated.

Embodiment FIG. 1 is a block diagram of a receiver 1 according to an embodiment of the present invention. In this embodiment, the operations described above, that is, the opening and closing operations of the car door lock mechanism and trunk lock, are performed within a certain period of time after the opening and closing of the doors and trunk are controlled, and when the key is removed from the ignition key cylinder. The system focuses on the fact that the frequency of use increases within a certain period of time after the door is closed, and within a certain period of time after the door is closed.

In order to open and close a door lock mechanism and a trunk lock of an automobile, a control signal radio wave emitted from a transmitter 2 is received by an antenna 3 and given to a high frequency amplification section 4 where it is amplified. The output of the high frequency amplification section 4 is converted into an intermediate frequency in the mixing section 5, and is supplied to the next stage intermediate frequency amplification section 6 for amplification. A local oscillator 7 is provided in association with the mixer 5 . The output of the intermediate frequency amplification unit 6 is sent to the demodulation unit 8 as digital data indicating the recognition code of the own vehicle equipped with the specific receiver 1 corresponding to the transmitter 2, as well as digital data indicating the locking mechanism of the door and the opening/closing of the trunk lock. It is demodulated into digital data representing a code for controlling the operation. The data matching section 9 matches the recognition codes, and if they match, sends a signal to the solenoid 10 for controlling the door, trunk, etc.
Derived as follows. The solenoid 10 drives the door and trunk lock mechanisms 11 to unlock or lock them based on this control signal.

The output of the demodulator 8 is also given to a high pass filter (hereinafter abbreviated as HPF) 15. this
The HPF 15 passes noise components other than data from the demodulated output and supplies it to the rectifier 16. Rectifier part 1
6 derives a so-called squelch signal that becomes high level when radio waves are being received, and supplies it to the OR gate 17. This squelch signal determines whether there is a received radio wave.

Further, an oscillation section 18 and a timer section 19 are provided in association with the OR gate 17.
receives the outputs from both of them and the output from the rectifying section 16 described above, and if any one of them is at a high level, outputs a signal to the constant voltage power supply section 20. The oscillating section 18 oscillates at a constant frequency and a constant duty ratio when a power supply voltage is applied. Further, the timer section 19 starts clocking operation based on the output of the OR gate 21, and continues to output a constant voltage within a certain period of time.

Electric power from a storage battery 25, which is a power source, is given to a constant voltage power supply section 20 from a power switch 26, stabilized, and supplied to each section.

The constant voltage power supply section 20 includes a terminal that controls ON/OFF of the output supplied to each section based on a signal from the OR gate 17. Electric power from the storage battery 25 is also applied via resistors 27 and 28 to a switch 29 that detects whether the door is opened or closed, and a switch 31 that is arranged in parallel with an ignition key switch 30. The switch 29 is conductive when the door is open, and the switch 31 is conductive when the key is inserted into the key hole. By turning on the ignition key switch 30, power is supplied to the internal combustion engine ignition system 32.

Connection points 33 and 34 between the resistors 27 and 28 and the switches 29 and 31 are connected to differentiating circuits 35 and 36, respectively. Differentiator circuit 35 derives a positive pulse when switch 29 is shut off, that is, when the door is closed. The differentiating circuit 36 also derives a positive pulse when the switch 31 is shut off, that is, when the key is removed. Differential circuit 35, 3
The output of 6 is given to the OR gate 21 together with the output of the data matching section 9 mentioned above.

The operation of this embodiment will be explained with reference to FIG. When the power switch 26 is turned on at time t1 as shown in FIG. 2, the output of the oscillator 18 shown in FIG. 2 controls the constant voltage power supply 20 through the OR gate 17. Therefore, the power supply voltage supplied to each part is turned ON/OFF depending on the frequency and duty ratio of the output of the oscillation part 18.
Repeat. FIG. 2 shows the waveform of the power supply voltage supplied from the constant voltage power supply section 20 to each section.

Time t2 when the output of the constant voltage power supply section 20 is ON
When the radio wave shown in FIG. 2 4 is received, the output of the rectifier 16 becomes high level, and the OR
Since the output of the constant voltage power supply unit 20 is turned ON through the oscillation unit 17, the power supply voltage is supplied to each unit regardless of the output of the oscillation unit 18 while receiving radio waves. When radio waves are no longer received at time t3, constant voltage power supply section 2
0 turns ON/OFF again in response to the output of the oscillator 18
Repeat. In this case, when the data collated by the data collation unit 9 matches a recognition code specific to the own vehicle and the solenoid 10 is activated, when the door is closed and input is received to the differential circuit 35, or when the input is received from the key hole. When the key is removed and input is applied to the differentiating circuit 35, an output is generated at the OR gate 21 and the timer section 19 is activated. FIG. 2 5 shows the timer section 19
The output waveform of is shown. As a result, the timer section 19
is a predetermined period of time W1 until time t4
As shown in FIG. 2, the constant voltage power supply section 20 is
It will remain ON for this amount of time. At time t4, when the time preset in the timer 19 has elapsed, the constant voltage power supply section 20 responds to the output of the oscillation section 18.
Repeat ON/OFF.

The power switch 26 is shut off when the vehicle is not used for a long time.

The clocking operation of the timer 19 may be started between time t2 or time t3.

The duty ratio of the output of the oscillation unit 18 may be selected to decrease as time passes.

FIG. 3 is a block diagram of a receiver 40 according to another embodiment of the present invention, which is similar to the previously described embodiment and corresponding parts bear the same reference numerals. What should be noted is that a voltage generation circuit 41, a voltage controlled oscillation circuit 42, a differentiating circuit 43, and a monostable circuit 44 are provided in place of the oscillation section 18 and timer section 19 in the above embodiment. .

The voltage generation circuit 41 sweeps from the voltage V1 to the voltage V2 within a predetermined time and provides its DC output to the voltage controlled oscillation circuit 42. The output of the voltage generating circuit 41 is reset to voltage V1 by the input from the OR gate 21. Voltage controlled oscillation circuit 4
2, the oscillation frequency changes in response to the input voltage from the voltage generation circuit 41, and the output is sent to the differentiating circuit 43.
give to The differentiation circuit 43 is the voltage controlled oscillation circuit 4
The rise of the input voltage from 1 is detected and a trigger pulse is given to the monostable circuit 44. monostable circuit 4
4 derives a pulse voltage of a constant width by a trigger input and supplies it to the OR gate 17.

The operation of this embodiment will be explained with reference to FIG.
At time t1, as shown in FIG. 4,
When the power switch 26 is turned on, the voltage generation circuit 4
1 output voltage V1 as shown in FIG.
The voltage gradually changes from V2 to V2, and remains constant after time t7. As a result, the output frequency of the voltage controlled oscillation circuit 42 changes from a high frequency to a low frequency following the input voltage as shown in FIG. 4, and remains constant after time t7.

Differentiator circuit 43 detects the rise of the output voltage of voltage controlled oscillation circuit 42 and provides a trigger pulse to monostable circuit 44 . When the monostable circuit 44 receives a trigger pulse, it derives a pulse having a constant width W2 shown in FIG. 4. The frequency of this pulse matches the output frequency of the voltage controlled oscillation circuit 42. Therefore, the constant voltage power supply section 20 supplies power supply voltage to each section only for the time period during which a pulse is derived from the monostable circuit 44. In this way, the duty ratio can be changed.

If radio waves are received between time t8 and t10,
As in the above-described embodiment, the constant voltage power supply section 20 continuously supplies power supply voltage to each section while radio waves are being received. In this case, at time t9, when the data collated by the data collation unit 9 matches the recognition code of the own vehicle and the solenoid 10 is driven, the door is closed and an input is received to the differentiating circuit 35, or the key When the key is removed from the hole and input is applied to the differential circuit 35, the OR gate 21
An output is generated to reset the voltage generation circuit 41,
In order to set the output voltage to V1, voltage control circuit 4
The output frequency of 2 becomes the highest value, and the constant voltage power supply section 2
The duty ratio of 0 becomes large.

The power switch 26 is shut off when the vehicle is not used for a long time.

Once the door lock mechanism and trunk lock are opened and closed as described above, and while the receivers are frequently reused, the power to the receivers 1 and 40 is continuously energized or the ratio of the ON time, that is, the duty Since intermittent reception is performed in which the ratio is increased and standby is performed, the inconvenience caused by conventional technology is improved, and when the receiver is not used, the effect of reducing power consumption due to intermittent reception is reduced. Obtainable.

Each of the embodiments described above can be implemented not only in automobiles but also in a wide variety of applications.

Effects As described above, according to the present invention, the power consumption of the receiver can be reduced and the usability is improved.

Another feature of the present invention is that the intermittent time interval of the receiver that performs intermittent reception is such that it remains in operation for a certain period of time after it is detected that a predetermined device of the automobile has been operated. The likelihood that the transmitter will send a signal decreases with the amount of time that has elapsed since the vehicle's device was operated (i.e., if the driver has just exited the vehicle, the transmitter cannot be used to open the door or trunk). Although it is likely that key control will be performed,
As time elapses since disembarkation, the probability that the sender will send a signal at that time decreases). This is particularly noticeable in automobile door lock devices and the like. By making the operating state longer for a certain period of time, it is possible to reduce power consumption as much as possible while suppressing a decrease in reception probability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a receiver 1 according to an embodiment of the present invention, FIG. 2 is a waveform diagram for explaining the operation of the receiver 1 shown in FIG. 1, and FIG. 3 is a block diagram of a receiver 1 according to an embodiment of the present invention. A block diagram of a receiver 40 according to an embodiment of the present invention, FIG.
FIG. 4 is a waveform diagram for explaining the operation of the receiver 40 shown in the figure. 1, 40...Receiver, 2...Transmitter, 3...Antenna, 4...High frequency amplification section, 5...Mixing section, 6
...Intermediate frequency amplification section, 7...Local oscillation section, 8...
Demodulation section, 9...Data verification section, 10...Solenoid, 11...Lock mechanism, 15...HPF, 16...
Rectifier section, 17, 21... OR gate, 18... Oscillation section, 19... Timer section, 20... Constant voltage power supply section, 25... Storage battery, 26... Power switch, 2
9, 30, 31... switch, 35, 36... differential circuit, 41... voltage generating circuit, 42... voltage controlled oscillation circuit, 43... differentiating circuit, 44... monostable circuit.

Claims (1)

[Scope of Claims] 1. An operation control device for a receiver that receives a transmission signal from a transmitter and controls electronic equipment installed in a vehicle according to the signal, the receiver being activated when the transmission signal is not detected. , means for performing an intermittent reception operation by alternately repeating an activation time in which the vehicle is activated and placed in a receiving state and a deactivation time in which it is deactivated and placed in a resting state; and detecting that a predetermined device of the vehicle is operated. and a control means that sets the reception state to a reception state whose activation time is longer than the intermittent reception operation for a certain period of time after the detection means detects that a predetermined device of the vehicle has been operated. Receiver operation control device. 2. In a receiver operation control device that receives a transmission signal from a transmitter and controls electronic equipment installed in a vehicle according to the signal, when the transmission signal is not detected, the receiver is activated and put into a reception state. means for performing an intermittent reception operation by alternately repeating an activation time in which the vehicle is activated and a deactivation time in which the vehicle is deactivated and placed in a rest state; A receiver characterized in that it includes a control means that sets the reception state in which the activation time is longer than that of the reception operation, and shortens the activation time according to the activation time according to the elapsed time to bring the receiver into the intermittent reception operation state. operation control device. 3. The receiver according to claim 1 or 2, wherein the detection means is a means for detecting that a key has been removed from an ignition key cylinder of an automobile. Motion control device. 4. The receiver operation control device according to any one of claims 1 and 2, wherein the detection means is a means for detecting opening and closing of an automobile door. 5. The transmitter transmits a signal including a recognition code, and the receiver controls the electronic device when the recognition code of the received signal matches a predetermined recognition code, and the detection means The operation of the receiver according to any one of claims 1 and 2, wherein the receiver is a detection means for detecting that the recognition code of the received signal matches a predetermined recognition code. Control device.