JP2002320278A - Portable device for remote control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable device for remote control, capable of suppressing consumption of an internal power source in its storage by suppressing the consumption of the internal power source as much as possible in receiving a noise signal. SOLUTION: When a portable device 11 is stored so as to be standing still in a house, etc., without being used, a vibration sensor 15 does not sense the changes in the state of the device 11, and the state of interrupting of supplying power from a battery 19 to a receiving circuit 12 remains. When the sensor detects the change in the state of the device 11, the supply of power from the battery 19 to the circuit 12 is allowed. During the time of standby status for a request signal, if a noise signal which is not a request signal is received for a prescribed time or more, the power supply to the circuit 12 is interrupted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control portable device capable of operating an external device from a remote location.

[0002]

2. Description of the Related Art In recent years, there have been proposed various devices provided with a portable device capable of operating an external device from a remote location.

For example, as an example of an automobile, a remote control device for a vehicle having a smart entry function and a smart ignition has been proposed. The smart entry function automatically unlocks the door lock when the vehicle owner (driver) approaches the vehicle and automatically locks the door lock when the driver leaves the vehicle. is there. The smart ignition function enables the engine to be started only by operating a switch or the like without using the current mechanical key, that is, the engine is put into a start standby state.

[0004] Such a remote control device for a vehicle is generally composed of a portable device having a receiving circuit, a microcomputer (microcomputer), a transmitting circuit, and the like, and a communication control device (external device) mounted in the vehicle. I have. The communication control device sends a first request signal to a predetermined area around the vehicle,
The second request signal is output intermittently only to the vehicle interior. When the microcomputer of the portable device receives those request signals via the receiving circuit,
A response signal including a predetermined ID code is transmitted via the transmission circuit in response to each request signal.

[0005] Upon receiving a response signal in response to the first or second request signal, the communication control device compares an ID code included in the response signal with an ID code preset in itself. When the ID codes match with each other, if the response signal is transmitted in response to the first request signal, the door is unlocked and the smart entry function is exhibited. If the response signal is transmitted in response to the second request signal, the engine is set to a start standby state, and the smart ignition function is exhibited.

Incidentally, a battery is mounted on the portable device as an internal power supply. The microcomputer and the receiving circuit in the portable device are always supplied with power from the battery, and the transmitting circuit is supplied with power from the battery only when transmitting the response signal. Has become.

[0007]

However, as described above, since the power (dark current) is always supplied from the battery to the microcomputer and the receiving circuit in the portable device, the microcomputer and the receiving circuit are not used and stored at home or the like. Dark current always flows,
There is a problem that extra power is consumed and the battery is wasted.

In particular, the receiving circuit of the portable device performs a process of demodulating the signal into a pulse signal when receiving a radio wave or a magnetic signal and inputting the signal to a microcomputer. For example, when a signal that becomes noise from a device other than the communication control device such as a home electric appliance is received, the same processing is performed on the signal. For this reason, there is a problem that the battery is further consumed due to the extra operation in the receiving circuit, and the battery life is shortened.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a noise signal (noise signal).
It is an object of the present invention to provide a remote control portable device capable of minimizing the consumption of a battery (internal power supply) even when receiving a battery, and suppressing the consumption of the battery (internal power supply) during storage.

[0010]

According to a first aspect of the present invention, there is provided a receiving means for receiving a request signal and a response for operating an external device in response to the request signal. A remote control portable device comprising: a transmitting means for transmitting a signal; a control means for controlling the receiving means and the transmitting means; and an internal power supply for operating the respective means. When the state change detecting means does not detect the state change, the power supply to the receiving means is cut off, and when the state change detecting means detects the state change, Power supply permitting means for permitting power supply to the receiving means so that the request signal can be received, and a noise signal other than the request signal when power is supplied to the receiving means. When receiving over time, and summarized in that and a first power interrupting means for interrupting the power supply to the receiving unit.

According to a second aspect of the present invention, in the first aspect, when power is supplied to the receiving means, the receiving means does not receive a request or noise signal for a predetermined time or more, and the state change detecting means detects a state change. The gist of the present invention is that a second power cut-off unit that cuts off the power supply to the receiving unit when not detected is further provided.

According to a third aspect of the present invention, in the first or second aspect, a request signal waiting time until a request signal is received when power is supplied to the receiving means by the power supply permitting means. The band is provided with mode switching means for driving the control means in the low power consumption mode to control the receiving means, and after receiving the request signal, driving the control means in the high power consumption mode to control the transmitting means. That is the gist.

According to the first aspect of the present invention, in a state where the remote control portable device is not used and stored in a stationary state, the state change detecting means detects the state change of the remote control portable device mechanically. , The power supply permitting means keeps the power supply to the receiving means shut off. Further, when the state change detecting means detects a state change, the power supply to the receiving means is permitted by the power supply permitting means. When a noise signal other than the request signal is received for a predetermined time or more during power supply to the receiving means, the first power cutoff means cuts off power supply to the receiving means.

According to the second aspect of the present invention, when power is supplied to the receiving means, if the receiving means does not receive the request or the noise signal for a predetermined time or more and the state change detecting means does not detect the state change, (2) The power supply to the receiving means is cut off by the power cutoff means.

According to the third aspect of the present invention, when power is supplied to the receiving means by the power supply permitting means, the mode switching means makes the request signal waiting time zone
The control means is driven in the low power consumption mode and controls the receiving means. After receiving the request signal, the control unit is driven in the high power consumption mode to control the transmission unit.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicle remote control device according to an embodiment of the present invention for locking and unlocking a vehicle door and providing an engine start standby state without using a mechanical key. One embodiment embodied in a portable device will be described with reference to FIGS.

FIG. 1A is a block diagram showing a remote control device for a vehicle. The vehicle remote control device 1 is a remote control portable device (hereinafter, referred to as a vehicle) owned by the owner (driver) of the vehicle 2.
And a communication control device 21 mounted on the vehicle 2. In the present embodiment, the communication control device 21 corresponds to an external device.

(Portable machine) Portable machine 11 formed in a flat shape
Is a receiving circuit 12 as a receiving means, a transmitting circuit 13 as a transmitting means, a microcomputer (microcomputer) 1
4. It has a vibration sensor 15 as a state change detecting means and a battery 19 as an internal power supply. The microcomputer 14, the receiving circuit 12, and the transmitting circuit 13
It is driven by electric power supplied from. In this embodiment, the microcomputer 14 controls the control unit, the power supply permitting unit, and the first unit.
And the second power cutoff means and the mode switching means.

The receiving circuit 12 is connected to the microcomputer 14,
When a request signal from the communication control device 21 is received, the signal is demodulated into a pulse signal and input to the microcomputer 14. The receiving circuit 12 is connected to a battery 19 via a switching element 12a.
In the present embodiment, as the switching element 12a, MO
SFETs are used.

The transmission circuit 13 is connected to the microcomputer 14,
The response signal output from the microcomputer 14 is modulated into a radio wave of a predetermined frequency (300 MHz in this embodiment) and transmitted to the outside. Note that antennas 17 and 18 are connected to the reception circuit 12 and the transmission circuit 13, respectively. That is, the receiving circuit 12 receives a request signal via the antenna 17, and the transmitting circuit 13 transmits a response signal via the antenna.

The microcomputer 14 is, specifically, a CPU 14
d, a CPU unit including a ROM (not shown) and a RAM (not shown), and having a nonvolatile memory 14a. When a request signal is input from the receiving circuit 12, the microcomputer 14 outputs a response signal including a predetermined ID code to the transmitting circuit 13 and transmits the response signal via the antenna 18. This I
The D code is recorded in the memory 14a.

The microcomputer 14 includes a clock oscillating unit 1
4b. As shown in FIG. 1B, the clock oscillating unit 14b includes a main clock oscillating unit 16a that oscillates a predetermined high frequency, and a subclock oscillating unit 16b that oscillates a low frequency lower than the frequency of the main clock oscillating unit 16a. And Further, the microcomputer 14 includes a mode switching unit 20, and the CPU 14d of the microcomputer 14
Is operated by the clock frequency of one of the oscillation units 16a and 16b selected by the mode switching unit 20. The mode switching unit 20 includes a main clock oscillation unit 16a based on a control signal from the microcomputer 14.
Is switched to one of the sub-clock oscillators 16b.

Before receiving the request signal, the mode switching section 20 selects the subclock oscillation section 16b,
A low frequency clock signal is given to the CPU 14d. C
The PU 14d (microcomputer 14) performs various control program processes in synchronization with the clock signal, such as determining a signal input from the outside via the receiving circuit 12, counting the time for waiting for a request signal, and the like.

When the microcomputer 14 confirms that the request signal is the request signal when the receiving circuit 12 receives the request signal, it outputs a control signal to the mode switching unit 20.
The mode switching unit 20 selects the main clock oscillating unit 16a based on the control signal and gives a high frequency clock signal to the CPU 14d. The CPU 14d (microcomputer 14) performs various control program processes such as outputting a response signal including an ID code to the transmission circuit 13 in synchronization with the clock signal.

The microcomputer 14 outputs a control signal to the mode switching section 20 when the power of the receiving circuit 12 is turned off. The mode switching section 20 switches and selects the subclock oscillation section 16b based on the control signal.

The microcomputer 14 further includes a counter unit 14
c. The counter unit 14c includes a standby counter that counts a time during which a request signal is waited (that is, a count number corresponding to the standby time), and a noise signal other than the request signal (hereinafter, “noise signal”).
), And a noise counter for counting the reception time (that is, the count number corresponding to the reception time).

A vibration sensor 15 is connected to the microcomputer 14. The vibration sensor 15 employs, for example, a configuration as shown in FIG. 2, and includes a case body 30, a vibrator 31, a spring 32, and first and second electrodes 33a and 33b. The vibrator 31 is disposed in the case 30 and is formed of a conductive sphere. One end of the pair of springs 32 is attached to the inner wall of the case body 30, and the other end is connected to the vibrator 31 so as to sandwich the vibrator 31 from both sides. Further, the first and second electrodes 33a and 33b are arranged inside the case body 30 with a predetermined gap therebetween.

When the vibrator 31 swings, the vibrator 31 closes between the electrodes 33a and 33b,
The circuit between the battery 19 formed via the vibration sensor 15 and the microcomputer 14 is conducted. Therefore,
When the portable device 11 is lifted or carried around,
When the state changes, the vibrator 31 shakes, and a state change detection signal (hereinafter, simply referred to as a “detection signal”) is output to the microcomputer 14. Therefore, the vibration sensor 15 mechanically detects a change in the state of the portable device 11. In the present embodiment, the vibrator 31
Swings to close the electrodes 33a and 33b when the state of the portable device 11 changes.

The microcomputer 14 outputs a power cutoff signal and a power allowance signal to the switching element 12a connected to the receiving circuit 12. The switching element 12a is turned on or off based on each signal from the microcomputer 14.

The portable device 11 is stopped at a place other than the vehicle,
In a state where the vibration sensor 15 does not detect the vibration (the vibrator 31 is not swinging), the switching element 12a is turned off, and the power supply from the battery 19 to the receiving circuit 12 is cut off. Has become.

When the vibrator 31 swings and a detection signal is input from the vibration sensor 15 to the microcomputer 14, a power allowance signal is output to the switching element 12a. Then, the switching element 12a is turned on, and the supply of power from the battery 19 to the receiving circuit 12 is permitted.

When a predetermined condition described later is satisfied, a power cutoff signal is output from the microcomputer 14 to the switching element 12a, the switching element 12a is turned off, and power is supplied from the battery 19 to the receiving circuit 12. Is cut off. Note that a slight dark current always flows from the battery 19 to the microcomputer 14 so as not to erase the contents stored in the RAM. A switching element (not shown) is provided between the transmission circuit 13 and the battery 19, and the switching element is turned on only when a response signal is transmitted. Therefore, in the present embodiment, power is supplied to the transmission circuit 13 only when the response signal is transmitted.

(Communication control device) The communication control device 21 includes a transmission circuit 22, a reception circuit 23, and a microcomputer (microcomputer) 24. This communication control device 21
Is disposed below the driver's seat in the cabin of the vehicle 2. The microcomputer 24 is connected with a door lock drive device 27 and an engine start device 28. The door lock driving device 27 is an actuator that locks and unlocks a door based on an input electric signal. Engine starter 28
Sets an unillustrated engine to a start standby state based on a permission signal input from the microcomputer 24.

The transmitting circuit 22 includes antennas 25a, 25b
, And an antenna 26 is connected to the receiving circuit 23. These antennas 25a, 25b, 26 are arranged near the door of the driver's seat. The transmission circuit 22 converts the first request signal output from the microcomputer 24 into a radio wave or a magnetic signal, outputs the signal to a predetermined area outside the vehicle compartment via the antenna 25a, and outputs the second request signal via the antenna 25b. The output is intermittently output to a predetermined area in the vehicle compartment. Accordingly, the portable device 11 and the communication control device 21 can communicate with each other within the output area of the first and second request signals. In the present embodiment, the first and second request signals are output as radio waves of 134 kHz.

The receiving circuit 23 receives a response signal containing the ID code output from the portable device 11 via the antenna 26, demodulates the response signal into a pulse signal, generates a reception signal, and generates the reception signal. Is output to the microcomputer 24.

The microcomputer 24 has a C (not shown).
It is a CPU unit composed of PU, ROM, and RAM,
The first and second request signals are always output intermittently.
The microcomputer 24 includes a nonvolatile memory 24a,
This memory 24a stores a predetermined ID code set in advance. When the received signal generated from the response signal is input, the microcomputer 24 has its own ID.
The code is compared with the ID code included in the received signal.

When the ID codes match, if the ID code is included in the response signal (reception signal) transmitted in response to the first request signal, the microcomputer 24 operates the door lock driving device. 27 is driven to unlock the door. When the response signal cannot be received or when the ID codes do not match, the door lock driving device 27 is driven to lock the door lock. As a result, the vehicle remote control device 1 performs a smart entry function.

On the other hand, when the ID codes match with each other, if the ID code included in the received signal corresponds to the signal transmitted in response to the second request signal, the microcomputer 24 starts the engine. A permission signal is output to the device 28 to put the engine in a standby state for starting. When a start switch (not shown) is operated in this state,
A starter relay (not shown) is turned on, the starter motor is driven, and the engine is started. When the microcomputer 24 cannot receive the response signal or when the ID codes do not match, the engine is started even if a start switch (not shown) is operated without outputting a permission signal to the engine starting device 28. Never. As a result, the vehicle remote control device 1 performs a smart ignition function.

(Operation) Next, the operation of the portable device 11 in the vehicle remote control device 1 configured as described above will be described with reference to the flowcharts shown in FIGS. In addition,
This process is performed by the microcomputer 14.

FIG. 3 shows a main routine performed by the microcomputer 14 of the portable device 11, and FIG. 4 shows a request signal waiting process (step (hereinafter abbreviated as "S") 1) described later.
The subroutine performed in 2) is shown.

As described above, when the portable device 11 is stored in a house or the like and is stationary, the circuit between the receiving circuit 12 and the battery 19 is electrically cut off by the switching element 12a, and the receiving circuit 12 Power is not supplied to the Therefore, when the portable device 11 is carried around or not used, unnecessary power consumption is suppressed, and the consumption of the battery 19 is reduced. In this state, even if a noise signal is output from an external home appliance or the like, since the receiving circuit 12 does not receive the signal, an unnecessary signal is demodulated into a pulse signal and input to the microcomputer 14. It is very effective without any processing.

At this time, the subclock oscillator 16b is selected by the mode switching unit 20, and the microcomputer 14 is driven in synchronization with the low frequency clock signal. The main routine shown in FIG. 3 is started when the vibrator 31 swings by lifting the portable device 11 and the vibration sensor 15 detects a state change (vibration) of the portable device 11.

In S11, the microcomputer 14 that has received the detection signal from the vibration sensor 15
2a to output a power allowable signal. Then, the switching element 12a is turned on, and the supply of power from the battery 19 to the receiving circuit 12 is permitted. As a result, the power supply of the receiving circuit 12 is turned on, so that the receiving circuit 12 can receive an external signal. Then, the flow shifts to S12, for performing a request signal waiting process. Note that a period from when power is supplied to the receiving circuit 12 to when the received signal is determined to be a request signal corresponds to a request signal waiting time zone.

When the processing in S12 is completed, the microcomputer 14
Outputs a power cutoff signal to the switching element 12a. Then, the switching element 12a is turned off,
The supply of power from the battery 19 to the receiving circuit 12 is cut off (S13), and the main routine ends.

Here, the request signal waiting process will be described in detail. Note that this flowchart is based on the first and second communication from the microcomputer 24 of the communication control device 21.
This is a process that is repeatedly performed at each timing at which the request signal is output intermittently (hereinafter, referred to as “request timing”).

When power is supplied to the receiving circuit 12 (request signal waiting time zone), the microcomputer 14 always determines whether or not a signal has been input (received) via the receiving circuit 12 (S100). . If there is any signal input (S100 is YES), S1
01, and the signal is sent to the first
Alternatively, it is determined whether the received signal is the second request signal. When it is determined that the input signal is the first or second request signal (YES in S101), the response signal including the ID code is transmitted (output) to the communication control device 21 via the transmission circuit 13 ( S102). When the process in S102 ends, the process returns to S100 again, and it is determined whether a signal has been accepted.

On the other hand, if it is determined in S101 that the input signal is not the first or second request signal (NO in S101), the process proceeds to S103. This corresponds to, for example, a case where the reception circuit 12 receives a noise signal from surrounding home electric appliances or the like when lifting and moving the portable device 11 in a house or the like.

In S103, it is determined whether or not a detection signal has been input from the vibration sensor 15 in the processing of this subroutine. For example, when the portable device 11 is carried around, the vibrator 31 always swings, and a detection signal is output from the vibration sensor 15 to the microcomputer 14. As described above, when the detection signal is input from the vibration sensor 15 (YES in S103), the process returns to S100.
On the other hand, when the detection signal is not input from the vibration sensor 15 (S103: NO), the process proceeds to S104, and the microcomputer 14 increments the count number in the noise counter of the counter unit 14c by one.

Next, in S105, it is determined whether or not the count number counted by the noise counter matches a preset count value, that is, a predetermined time T1.
It is determined whether the received signal has been received. Then, when the count number of the noise counter matches the count value (S105: YES), the process proceeds to S106, and when the count number does not yet match the count value (S105: NO), the process proceeds to S100. Return.

When the detection signal from the vibration sensor 15 is not inputted and the noise signal is received from the outside by the receiving circuit 12 (microcomputer 14), S100, S101, S103, S104, S10
The process of No. 5 is repeated, and the count number of the noise counter continues to be incremented in S104. Therefore, when the count number of the noise counter matches the count value in S105, it is determined that the portable device 11 is stopped and the state of receiving the noise signal for the predetermined time T1 or more has continued.

Thereafter, in S106, the noise counter is reset, and this flowchart ends.
That is, the processing shifts to the main routine and the switching element 12
a from the battery 19 to the receiving circuit 12.
The power supply to is stopped (S13). Therefore, in the request signal waiting time zone, when there is no detection signal from the vibration sensor 15 and the noise signal is input for the predetermined time T1, S100, S101, S103, S104, S104
Power supply to the receiving circuit 12 is cut off via 105 and S106.

If no signal is received via the receiving circuit 12 in S100, the process proceeds to S107.
Then, it is determined whether or not a detection signal has been input from the vibration sensor 15 in the processing of the current subroutine. For example, when the portable device 11 is carried around, the vibrator 31 swings, and a detection signal is input from the vibration sensor 15 (YES in S107), the process returns to S100.

On the other hand, if there is no input of the detection signal from the vibration sensor 15 (S107: NO), the process proceeds to S108, and the count of the standby counter in the counter section 14c is incremented by one. Thereafter, in S109, it is determined whether or not the count number counted by the standby counter matches the preset count value, that is, whether or not a state where no request signal or noise signal has been input has passed for a predetermined time T2 or more. Is determined. And
When the count number of the standby counter matches the count value (YES in S109), the process proceeds to S110, and when the count number does not yet match the count value, the process returns to S100.

When no signal is input from the outside and no detection signal is input from the vibration sensor 15, S100, S107, S10
8. The processing of S109 is repeated. And S108
In, the count number of the standby counter continues to be incremented. Therefore, in S109, when the count number of the standby counter matches the count value,
It is determined that no signal is input from outside and the portable device 11 has been kept still for more than the predetermined time T2. The predetermined time T1 for the noise counter
(Count value) and predetermined time T relating to the standby counter
2 (count value) may be the same or different.

Next, in S110, the standby counter is reset, and this flowchart ends. That is, the process shifts to the main routine, outputs a power cutoff signal to the switching element 12a, and cuts off power supply from the battery 19 to the receiving circuit 12 (S13).

The determinations in S106 and S109 in the subroutine of the request signal waiting process correspond to the above-described predetermined conditions. Here, for example, when the portable device 11 is placed in a vehicle interior in a stationary state, the vibration sensor 15
There is no input of the detection signal from. However, since the request signal is intermittently transmitted from the microcomputer 24 of the communication control device 21, in that case, S100, S10
1, S102 is repeated, and the power supply to the receiving circuit 12 is not interrupted.

In the request signal waiting time zone, the microcomputer 14 does not need to perform control processing at high speed.
Therefore, in each step other than S102 in the above-described request signal waiting process, the microcomputer 14
Outputs a control signal to the mode switching unit 20, and the mode switching unit 20 switches and selects the subclock oscillation unit 16b based on the control signal. Then, the microcomputer 14 synchronizes with the low-frequency clock signal (sub clock), for example, counts each counter or externally receives the reception circuit 12.
Each processing such as a judgment processing of a signal received via the PC is performed.

S102 after receiving the request signal
In, the microcomputer 14 outputs a control signal to the mode switching unit 20, and the mode switching unit 20 switches and selects the main clock oscillation unit 16a based on the control signal. Then, the microcomputer 14 performs a process of transmitting a response signal to the communication control device 21 via the transmission circuit 13 at high speed in synchronization with a high-frequency clock signal (main clock).

Note that when the processing of each step is performed in synchronization with the sub clock, it corresponds to the low power consumption mode, and when the processing of S102 is performed in synchronization with the main clock, the high power consumption mode is set. This corresponds to the consumption mode. Usually, when the operating frequency of the microcomputer 14 is small, the power consumption is suppressed. In the present embodiment, in the request signal waiting process, all the processes other than the process of S102 are performed in the low power consumption mode, so that the consumption of the battery 19 is preferably suppressed.

Therefore, according to the above embodiment, the following effects can be obtained. (1) In the above embodiment, when the portable device 11 is not used and is kept stationary at home or the like, the vibration sensor 15
The state change of the portable device 11 is not detected, and the cutoff state of the power supply from the battery 19 to the receiving circuit 12 is maintained. And
When the vibration sensor 15 detects a change in the state of the portable device 11 due to the lifting of the portable device 11, power supply from the battery 19 to the receiving circuit 12 is allowed. Therefore, during storage, the dark current flowing through the receiving circuit 12 can be reduced, and the consumption of the battery 19 can be suppressed. Further, when a noise signal other than the request signal is received for a predetermined time T1 or more in the request signal waiting time zone, the power supply to the receiving circuit 12 is cut off. Therefore, even when an unnecessary noise signal is received, consumption of the battery 19 can be suppressed as much as possible.

(2) In the above embodiment, in the request signal waiting time zone, the receiving circuit 1
2 does not receive the request signal from the communication control device 21, and when the vibration sensor 15 does not detect a change in the state of the portable device 11, the power supply to the receiving circuit 12 is cut off. Therefore, in a case where the battery 19 is not located near the vehicle and is not carried around, the consumption of the battery 19 can be suitably suppressed.

(3) In the above embodiment, when the request signal is received from the communication control device 21 in the request signal waiting time zone, the microcomputer 14 synchronizes with the main clock at a high speed via the transmission circuit 13. Each control process was performed in synchronization with the subclock while the response signal was transmitted and the request signal was not received. Therefore, there is no need to perform high-speed processing other than the transmission processing of the response signal at the time of receiving the request signal, so that the control processing can be suitably performed even if a subclock whose operating frequency is lower than the main clock is used. Further, since the sub-clock has a lower operating frequency than the main clock, the consumption of the battery can be further suppressed in the request signal waiting time zone.

(4) In the above embodiment, the communication control device 2
A request signal is intermittently transmitted from one microcomputer 24. Then, while the receiving circuit 12 continues to receive the request signal, power supply to the receiving circuit 12 is maintained. For this reason, for example, even if the portable device 11 is arranged in a state of being stationary in the passenger compartment together with the owner, the power supply to the receiving circuit 12 is not interrupted.

(5) In the above embodiment, when the portable device 11 is moving while vibrating, such as when the owner is carrying the portable device 11, the vibration sensor 15 is Vibration is detected. For this reason,
No extra power is required to detect vibration.

(6) In the above embodiment, when the portable device 11 is carried around in the request signal waiting time zone and the detection signal is always input from the vibration sensor 15, a noise signal is input. Even receiving circuit 1
2 is maintained. Therefore, the power supply of the receiving circuit 12 is not repeatedly turned on / off in a meaningless manner.

The above embodiment may be modified as follows. In the above embodiment, the vibration sensor 15 is used to detect a change in the state of the portable device 11.
May be used. As the vibration sensor, for example, a configuration as shown in FIG. 5 can be adopted. That is, the tilt sensor 41 is
2, mercury 43, and first and second electrodes 44 and 45. The mercury 43 is movably arranged in the internal space of the case body 42. The first and second electrodes 44 and 45 are arranged in the internal space of the case body 42 with a gap therebetween. And the flat portable device 1
When the mercury 43 is tilted by a predetermined angle θ from the state in which the first and second electrodes 4 and 4 are arranged horizontally, the first and second electrodes 4 are moved.
Between 4, 45 is closed. Then, when the portable device 11 is placed horizontally again, the mercury 43 moves and opens between the first and second electrodes 44 and 45. Even in this case, the change in the state of the portable device 11 can be suitably detected mechanically. In this case, when the lump of mercury 43 moves and closes between the electrodes 44 and 45, the state of the portable device 11 changes.

In the above embodiment, when the receiving circuit 12 receives the noise signal for the predetermined time T1 or more, the receiving circuit 12
Although the power supply to the receiving circuit 12 is cut off when the noise signal is received in the request signal waiting time zone, the power supply to the receiving circuit 12 may be cut off immediately.

In the above embodiment, the clock oscillating unit 14
b and the mode switching unit 20, and the microcomputer 14 performs the control processing in synchronization with the main clock or the sub clock. However, the microcomputer 14 may perform the control processing in synchronization with only one clock signal. .

In the above embodiment, the portable device 11 of the vehicle remote control device 1 having the smart entry function and the smart ignition function has been embodied. May be embodied in the portable device 11 of the remote control device 1.

In the above embodiment, even when a noise signal is being received, if the vibration sensor 15 detects vibration, the power supply to the receiving circuit 12 is maintained. , The power supply to the receiving circuit 12 may be unconditionally cut off.

Next, the technical ideas that can be grasped from the above-described embodiment and each example will be described below together with their effects. (1) In the portable remote control device according to any one of claims 1 to 3, the first power cut-off means receives the signal only when the state change detection means does not detect the state change. A portable device for remote control characterized by shutting off power supply to a vehicle. In this way, the permission and the interruption of the power supply to the receiving means are not repeated in a meaningless manner.

(2) The remote control portable device according to any one of claims 1 to 3 and the technical idea (1), wherein the state change detecting means is a remote control portable device. A remote control portable device that is a vibration sensor or a tilt sensor that detects vibration or tilt. In this way, the change in the state (vibration or inclination) of the remote control portable device can be suitably detected by the vibration sensor or the inclination sensor.

(3) The remote control portable device according to any one of claims 1 to 3, and the technical ideas (1) and (2), a request signal is transmitted, and the request signal is transmitted. A remote control device for a vehicle, comprising: a transmission / reception control unit that receives a response signal transmitted from a portable device in response to the request; and the transmission / reception control unit includes an external device that periodically transmits a request signal. With this configuration, it is possible to easily realize a configuration in which the power supply to the receiving unit is not erroneously interrupted when the remote control portable device is stationarily arranged near the external device. In the above embodiment, a transmission / reception control unit includes the transmission circuit 22, the reception circuit 23, and the microcomputer 24 of the communication control device 21.

[0074]

As described above in detail, according to the first aspect of the present invention, even when a noise signal is received, the consumption of the internal power is suppressed as much as possible, and the consumption of the internal power during storage is suppressed. Can be.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the consumption of the internal power can be more suitably suppressed by the second power cutoff means. According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, in the request signal waiting time zone, the control processing can be suitably performed in the low power consumption mode with low power consumption.

[Brief description of the drawings]

FIG. 1A is a block diagram illustrating a schematic configuration of a vehicle remote control device according to an embodiment of the present invention, and FIG. 1B is a block diagram illustrating a schematic configuration for performing mode switching.

FIG. 2 is a principle diagram showing a vibration sensor.

FIG. 3 is a flowchart showing a main routine according to the operation of the portable device.

FIG. 4 is a flowchart showing a request signal waiting process.

FIG. 5 is a principle view showing an inclination sensor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Remote control portable device, 12 ... Receiving circuit (receiving means), 13 ... Transmitting circuit (transmitting means), 14 ... Microcomputer (Control means, power supply permission means, 1st power cutoff means, 2nd power cutoff means , Mode switching means), 15 ...
Vibration sensor (state change detecting means), 19: battery (internal power supply), 21: communication control device (external device).

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Claims (3)

[Claims] A receiving means for receiving a request signal;
A remote unit comprising: a transmitting unit for transmitting a response signal for operating an external device in response to the request signal; a control unit for controlling the receiving unit and the transmitting unit; and an internal power supply for operating each of the units. In the control portable device, state change detection means for mechanically detecting a state change of the remote control portable device, and when the state change detection means does not detect a state change,
Power supply to the receiving means is cut off, and when the state change detecting means detects a state change, power supply permitting means for permitting power supply to the receiving means so as to be able to receive a request signal, Remote control, comprising: first power cutoff means for cutting off power supply to the receiving means when a noise signal other than the request signal is received for a predetermined time or more during power supply to the receiving means. For portable devices. 2. When power is supplied to the receiving unit, the receiving unit does not receive a request or a noise signal for a predetermined time or more,
And when the state change detecting means does not detect the state change,
The portable device for remote control according to claim 1, further comprising a second power cutoff unit that cuts off power supply to the reception unit. 3. When the power supply permitting unit supplies power to the receiving unit, the control unit drives the control unit in the low power consumption mode to control the receiving unit during a request signal waiting time period until a request signal is received. 3. The remote control portable device according to claim 1, further comprising a mode switching unit for driving the control unit in the high power consumption mode to control the transmission unit after receiving the request signal. Machine.