JP5590482B2 - Switching system - Google Patents

Description

  The present invention relates to a switching system.

  A passive keyless entry (PKE) system is becoming standard equipment as a switching system for switching and controlling locking / unlocking of automobile doors. This passive keyless entry system does not require the operation of a portable device (FOB) by the owner of the vehicle, and controls the locking / unlocking of the door by detecting the separation / proximity of the portable device to the vehicle.

  For example, Patent Document 1 discloses a transmitter that is provided in a vehicle and transmits a transmission request signal, a portable device that receives a signal transmitted from the transmitter and transmits a return signal, and a portable device that is provided in the vehicle. Communication area with a portable device in a vehicle-mounted device remote control device having a receiver that receives a transmission signal transmitted from the receiver and a control unit that performs operation control of the vehicle-mounted device by receiving a return signal at the receiver It is disclosed that a communication area changing means for changing the communication area can be provided so that the user can set the communicable area to an optimal size, thereby preventing the area from being too large and wasting power consumption. Yes.

  Patent Document 2 discloses carrier wave duty as a receivable range adjustment means capable of changing a receivable range of a radio signal obtained by ASK modulation of a carrier wave transmitted from a portable device with a baseband signal in a vehicle remote control system. It is disclosed that duty control means for changing the transmission output of a radio signal by changing the ratio is provided, and thereby the receivable range is sufficiently adjusted according to application conditions.

Japanese Patent Laid-Open No. 11-71948 JP 2006-174154 A

  However, when the mobile device enters the area where the request signal from the in-vehicle control device is received, the door is unlocked, while when the mobile device goes out of the area, the door is locked. In the vicinity of the boundary of the area, the locking / unlocking may be repeated continuously and the operation may become unstable.

  An object of the present invention is to enable stable switching of a switching state between a first switching state and a second switching state.

The switching system of the present invention comprises:
A control device having a transmitter for transmitting a request signal;
A portable device that returns a response signal when receiving a request signal from the transmitter of the control device;
A switching system comprising:
The control device includes a receiver that receives a response signal from the portable device, and a switch that switches and controls a switching state between a first switching state and a second switching state based on the response signal received by the receiver. A controller, and
The transmitter of the control device transmits a request signal with a relatively weak magnetic field in the first area including the control device in the first switching state, and includes the first area in the second switching state. Configured to transmit a request signal in a relatively strong magnetic field within a wide second area;
In the first switching state , the switching controller of the control device switches the switching state to the second switching state when detecting that the portable device is present in the first area, In the second switching state, the mobile device is configured to switch the switching state to the first switching state when it is detected that the portable device is outside the second area.

  According to the present invention, in the first switching state, when the predetermined first switching condition is satisfied, the second switching state is switched. On the other hand, in the second switching state, the switching condition is different from the condition opposite to the first switching condition. Since switching to the first switching state when the second switching condition is satisfied, the switching from the first switching state to the second switching state and vice versa has different boundary conditions, and therefore a single boundary Switching is not continuously repeated in the vicinity of the boundary condition as in the case of switching control of the switching state under conditions, and therefore switching of the switching state is stable under both boundary conditions of the first and second switching conditions. Can be done.

1 is a block diagram showing a passive keyless entry system according to Embodiment 1. FIG. 3 is a block diagram illustrating a configuration of a transmitter according to Embodiment 1. FIG. It is explanatory drawing about a magnetic field. (A) And (b) is explanatory drawing which shows the transmission area of a request signal. 3 is a flowchart illustrating control by the switching controller according to the first embodiment. 6 is a block diagram illustrating a configuration of a transmitter according to Embodiment 2. FIG. It is a flowchart which shows the control by the switching controller of Embodiment 2. 6 is a block diagram illustrating a configuration of a transmitter according to Embodiment 3. FIG. 10 is a flowchart illustrating control by a switching controller according to a third embodiment.

  Hereinafter, embodiments will be described in detail based on the drawings.

(Embodiment 1)
FIG. 1 shows a passive keyless entry (PKE) system S (switching system) according to the first embodiment. In the passive keyless entry system S according to the first embodiment, the lock / unlock state of the door lock mechanism (door lock actuator) 30 (vehicle electrical equipment) is set to a locked state (first switching state) and an unlocked state (second The switching control is performed between the switching state and the switching state.

  The passive keyless entry system S according to the first embodiment includes a control device 10 mounted on a vehicle and a portable device 20 (FOB) carried by the owner of the vehicle.

  The control device 10 includes a transmitter 11, a receiver 12, and a switching controller 13. Each of the transmitter 11 and the receiver 12 is connected to a switching controller 13. The switching controller 13 is connected to each of a door lock mechanism 30, a door opening / closing sensor 40, and an ignition switch 50 outside the apparatus. In addition, the control apparatus 10 is connected to the vehicle-mounted battery which is not shown in figure, and is comprised so that electric power supply may be received from there.

As shown in FIG. 2, the transmitter 11 includes a transmission circuit 111 connected to the switching controller 13. Transmission antenna 112 is provided to the transmitter 11, and one end thereof is connected to the transmitting circuit 111 via a first resistor R _1. The other end of the transmitting antenna 112 is grounded via a second resistor R _2. Further, the transmitter 11 is provided with a ground switch 113, and the other end of the transmission antenna 112 is also connected to the ground switch 113 so that the ground / non-ground can be switched. . The ground switch 113 is connected to the switching controller 13.

Here, if the other end of the transmitting antenna 112 by the grounding switch 113 is not grounded, the second resistor R ₂ is configured to be connected in series to the first resistor R ₁ and the subsequent stage in front of the transmitting antenna 112 Therefore, assuming that the inductance of the transmission antenna 112 is L, the capacitance is C, and the resistance is r, the Q ₁ value of the first antenna circuit at this time is expressed by the following equation (1).

On the other hand, if the other end of the transmitting antenna 112 is grounded by the grounding switch 113, since the first resistor R ₁ is connected to in series in front of the transmitting antenna 112, the second antenna circuit at this time The Q ₂ value is as shown in the following equation (2).

That is, the first resistor R ₁ and a second resistor R _2, thus performing the function for adjustment of the Q value. In addition, the first resistor R ₁ functions to protect the transmission circuit 111 when the harness of the transmission antenna 112 is short-circuited.

  Further, the signal transmission area of the transmission antenna 112 is proportional to the magnetic field. Further, as shown in FIG. 3, the magnetic field of the transmission antenna 112 is expressed by the following equations (3) and (4), and the magnetic field is proportional to the current.

Here, I ₀ is the current flowing through the transmission antenna 112, N is the number of turns of the transmission antenna 112, S is the opening area of the transmission antenna 112, and l is the distance from the transmission antenna 112.

And the range larger than _Hmin of following Formula (5) becomes a communicable area.

Here, H _min is the minimum magnetic flux density required for reception, V _Tmin is the minimum reception voltage of the portable device 20, f is the reception frequency / transmission frequency (for example, 125 kHz), μ ₀ is the magnetic permeability in vacuum, and _NT is the portable number of turns of the receiving antenna of the apparatus 20, S _T is the opening area of the receiving antenna of the portable device 20, Q _T is the Q value of the receiving antenna and the receiving circuit of the portable device 20, and α is the direction the surface of the receiving antenna of the magnetic field generated The angle in the normal direction.

In the transmitter 11, assuming that the applied voltage is constant, when the first antenna circuit in which the other end of the transmission antenna 112 is not grounded is configured by the ground switch 113 under the control of the switching controller 13. As shown in FIG. 4 (a), the request signal is narrowly centered on the vehicle V with a relatively small current, and therefore a weak magnetic field, and the first area A ₁ (shaded area, for example, within a radius of 1 to 2 m)) On the other hand, when the second antenna circuit is configured in which the other end of the transmission antenna 112 is grounded by the ground switch 113 under the control of the switching controller 13, as shown in FIG. The request signal is transmitted with a relatively large current, and therefore with a strong magnetic field, to the second area A ₂ that is wide around the vehicle V (a hatched portion, for example, within a radius of 1.2 to 3 m). . That is, the request signal transmitted in the unlocked state can be communicated over a longer distance than the request signal transmitted in the locked state.

  The receiver 12 has a receiving circuit connected to the switching controller 13, and a receiving antenna connected to the receiving circuit is provided.

  The switching controller 13 is composed of a microcomputer having a CPU and a memory.

  The portable device 20 includes a transmission unit and a reception unit. Note that a power source such as a button battery for power supply may be provided in the portable device 20.

  In the passive keyless entry system S according to the first embodiment, the control device 10 causes the transmitter 11 to transmit a request signal (for example, several tens of kHz to 30 MHz in the LF band to the HF band) from the transmission antenna 112 by the transmission circuit 111. In the portable device 20, when the receiving unit receives a request signal from the transmitter 11 of the control device 10, the transmitting unit returns a pulsed response signal (for example, 300 MHz band). Then, when the receiver 12 receives the response signal from the portable device 20, the control device 10 authenticates the ID of the response signal by the switching controller 13, and locks and unlocks based on the response signal. The lock / unlock state is switched between the states. In addition, the control device 10 determines whether the switching controller 13 is locked based on information from the door lock mechanism 30, whether the door is closed based on information from the door opening / closing sensor 40, and an ignition switch. Whether or not a key is inserted is detected based on information from 50.

  Hereinafter, the switching control of the locked / unlocked state in the control device 10 will be described in detail based on the flowchart shown in FIG. This switching control is executed by arithmetic processing by the CPU of a computer program installed in the switching controller 13. This computer program is a loop program.

  In step A1, it is determined whether or not a key is inserted. If YES, the process proceeds to step A2, and if NO, the process returns to step A1.

  In step A2, it is determined whether or not the door is closed. If YES, the process proceeds to step A3. If NO, the process returns to step A1.

  In step A3, it is determined whether or not the door is locked. If YES, the process proceeds to step A4. If NO, that is, if the door is unlocked, the process proceeds to step A7.

In step A4, the ground switch 113 does not ground the other end of the transmission antenna 112, but causes the transmitter 11 to transmit a request signal from the first antenna circuit, and proceeds to step A5. At this time, the request signal is transmitted to the first area A ₁ that is narrow with the vehicle V as the center, with a small current, and as shown in FIG. Therefore, since the locked state is normally a standby state for a long time, the request signal during that period can be transmitted with low current consumption.

In step A5, it is determined whether or not the receiver 12 has received a response signal for ID authentication from the portable device 20, that is, whether or not the control device 10 is communicating with the portable device 20 associated therewith. If YES, the process proceeds to Step A6. If NO, the process returns to Step A4. At this time, in the case of YES, the first switching condition that the ID-authenticated response signal is received from the portable device 20 existing in the first area A ₁ that is transmitting the request signal with a weak magnetic field is satisfied. it means that the, this portable device 20 becomes to be present in the first area a ₁ shown in FIG. 4 (a), i.e., the owner of the vehicle with a portable device 20 approaches the vehicle That is.

In step A6, the door locking state is switched to the unlocking state, and the process returns to step A1. At this time, since the switching between the locked state of the door when it becomes the portable device 20 is present in a narrow first area A ₁ to the unlocked state, it is possible to improve the security properties.

On the other hand, in step A7, the other end of the transmission antenna 112 is grounded by the ground switch 113, the transmitter 11 is caused to transmit a request signal from the second antenna circuit, and the process proceeds to step A8. At this time, a large current, therefore, as shown in FIG. 4 (b), the request signal intensity magnetic field which is transmitted to the large second area A ₂ around the vehicle V.

In step A8, after the receiver 12 receives the response signal for ID authentication from the portable device 20, it is further determined whether or not the same response signal for ID authentication is received. If YES, the process proceeds to step A9. If NO, the process returns to step A7. At this time, if YES, the second switching condition that ID response signal authentication from the portable device 20 present in the second area A in ₂ making the request signal in a strong magnetic field is not received is satisfied it means that this is, so that the portable device 20 is present in the second area a ₂ outside shown in FIG. 4 (b), i.e., that the owner of the vehicle carrying the mobile device 20 moves away from the vehicle That is. This second switching condition is different from the condition opposite to the first switching condition. In step A8, after the receiver 12 receives the response signal for ID authentication from the portable device 20, it is determined whether or not the same response signal for ID authentication is received. so as not to the owner of the mobile device 20 before resulting in rushed out the second area a ₂ outside, it is preferable to set a wide second area a _2. Thus by setting a wide second area A _2, is capable of getting off from other than the driver's seat, to prevent it getting off from the driver's seat being locked while go get luggage to trunk You can also. In addition, it is preferable that the area in the vehicle interior be communicable so that the key is not left in the vehicle interior and inadvertently locked in that state.

  In step A9, the unlocked state of the door is switched to the locked state, and the process returns to step A1.

According to the passive keyless entry system S according to this embodiment 1, it at the time of the locked state, when the first switching condition is met, which was decided that the portable device 20 is present in a narrow first area A ₁ Is detected, and when the unlocked state, the second switching condition different from the condition opposite to the first switching condition is satisfied, that is, the portable device 20 is in the first area A _1. since switching to the locked state when it is detected that was to present in the second area a ₂ outside the broader range including, switching from the switching and unlocked state from the locked state to the unlocked state to the locked state Therefore, switching is not continuously repeated in the vicinity of the boundary condition as in the case where switching control of the switching state is performed under a single boundary condition. The switching of the locking / unlocking state can be performed stably at any boundary condition second switching condition. Moreover, the passive keyless entry system S according to the first embodiment can perform such control at a low cost because the circuit configuration of the antenna circuit of the transmission antenna 112 is relatively simple.

(Embodiment 2)
A schematic configuration of a passive keyless entry (PKE) system S according to the second embodiment is the same as that of the first embodiment shown in FIG. In addition, the part of the same name as Embodiment 1 is shown with the same code | symbol as Embodiment 1. FIG.

In the passive keyless entry system S according to the second embodiment, the transmitter 11 includes a transmission circuit 111 connected to the switching controller 13 as shown in FIG. Transmission antenna 112 is provided to the transmitter 11, and one end thereof is connected to the transmitting circuit 111 via a first resistor R _1. The other end of the transmission antenna 112 is grounded. A voltage variable circuit 114 is connected to the transmission circuit 111, and the voltage variable circuit 114 is connected to the switching controller 13.

When a relatively low voltage is applied from the transmission circuit 111 to the transmission antenna 112 by the voltage variable circuit 114 under the control of the switching controller 13, the transmitter 11 uses a small current, and thus a request signal with a weak magnetic field. Is transmitted to a narrow first area A ₁ (shaded portion, for example, within a radius of 1 to 2 m), while a relatively high voltage is applied from the transmission circuit 111 to the transmission antenna 112 by the voltage variable circuit 114 under the control of the switching controller 13. In such a case, the request signal is transmitted to a large second area A ₂ (in the hatched portion, for example, within a radius of 1.2 to 3 m) with a large current, and thus with a strong magnetic field. That is, the request signal transmitted in the unlocked state can be communicated over a longer distance than the request signal transmitted in the locked state.

  In the passive keyless entry system S according to the second embodiment, the control device 10 causes the transmitter 11 to transmit a request signal (for example, several tens of kHz to 30 MHz in the LF band to the HF band) from the transmission antenna 112 by the transmission circuit 111. In the portable device 20, when the receiving unit receives a request signal from the transmitter 11 of the control device 10, the transmitting unit returns a pulsed response signal (for example, 300 MHz band). Then, when the receiver 12 receives the response signal from the portable device 20, the control device 10 authenticates the ID of the response signal by the switching controller 13, and locks and unlocks based on the response signal. The lock / unlock state is switched between the states. In addition, the control device 10 determines whether the switching controller 13 is locked based on information from the door lock mechanism 30, whether the door is closed based on information from the door opening / closing sensor 40, and an ignition switch. Whether or not a key is inserted is detected based on information from 50.

  Hereinafter, the switching control of the locked / unlocked state in the control device 10 will be described in detail based on the flowchart shown in FIG.

  In Step B1, it is determined whether or not a key is inserted. If YES, the process proceeds to Step B2, and if NO, the process returns to Step B1 again.

  In step B2, it is determined whether or not the door is closed. If YES, the process proceeds to step B3. If NO, the process returns to step B1 again.

  In step B3, it is determined whether or not the door is locked. If YES, the process proceeds to step B4. If NO, that is, if the door is unlocked, the process proceeds to step B7.

In step B4, the voltage variable circuit 114 applies a low voltage from the transmission circuit 111 to the transmission antenna 112 to cause the transmitter 11 to transmit a request signal with a weak magnetic field, and the process proceeds to step B5. At this time, the request signal is transmitted to the first area A ₁ that is narrow with the vehicle V as the center, with a small current, and as shown in FIG. Therefore, since the locked state is normally a standby state for a long time, the request signal during that period can be transmitted with low current consumption.

In step B5, it is determined whether or not the receiver 12 has received a response signal for ID authentication from the portable device 20, that is, whether or not the control device 10 is communicating with the portable device 20 associated therewith. If YES, the process proceeds to Step B6. If NO, the process returns to Step B4. At this time, in the case of YES, the first switching condition that the ID-authenticated response signal is received from the portable device 20 existing in the first area A ₁ that is transmitting the request signal with a weak magnetic field is satisfied. it means that the, this portable device 20 becomes to be present in the first area a ₁ shown in FIG. 4 (a), i.e., the owner of the vehicle with a portable device 20 approaches the vehicle That is.

In step B6, the door locking state is switched to the unlocking state, and the process returns to step B1. At this time, since the switching between the locked state of the door when it becomes the portable device 20 is present in a narrow first area A ₁ to the unlocked state, it is possible to improve the security properties.

On the other hand, in step B7, the voltage variable circuit 114 applies a high voltage from the transmission circuit 111 to the transmission antenna 112 to cause the transmitter 11 to transmit a request signal with a strong magnetic field, and the process proceeds to step B8. At this time, a large current, therefore, as shown in FIG. 4 (b), the request signal intensity magnetic field which is transmitted to the large second area A ₂ around the vehicle V.

In step B8, after the receiver 12 receives the response signal for ID authentication from the portable device 20, it is further determined whether or not the same response signal for ID authentication is received. If YES, the process proceeds to step B9. If NO, the process returns to step B7. At this time, if YES, the second switching condition that ID response signal authentication from the portable device 20 present in the second area A in ₂ making the request signal in a strong magnetic field is not received is satisfied it means that this is, so that the portable device 20 is present in the second area a ₂ outside shown in FIG. 4 (b), i.e., that the owner of the vehicle carrying the mobile device 20 moves away from the vehicle That is. This second switching condition is different from the condition opposite to the first switching condition. In step B8, after the receiver 12 receives the ID-authenticated response signal from the portable device 20, it is further determined whether or not the same ID-authenticated response signal is received. so as not to the owner of the mobile device 20 before resulting in rushed out the second area a ₂ outside, it is preferable to set a wide second area a _2. Thus by setting a wide second area A _2, is capable of getting off from other than the driver's seat, to prevent it getting off from the driver's seat being locked while go get luggage to trunk You can also. In addition, it is preferable that the area in the vehicle interior be communicable so that the key is not left in the vehicle interior and inadvertently locked in that state.

  In step B9, the unlocked state of the door is switched to the locked state, and the process returns to step B1.

  Other configurations and operational effects are the same as those of the first embodiment.

(Embodiment 3)
The schematic configuration of a passive keyless entry (PKE) system S according to the third embodiment is the same as that of the first embodiment shown in FIG. In addition, the part of the same name as Embodiment 1 is shown with the same code | symbol as Embodiment 1. FIG.

In the passive keyless entry system S according to the third embodiment, the transmitter 11 includes a transmission circuit 111 connected to the switching controller 13 as shown in FIG. Transmission antenna 112 is provided to the transmitter 11, and one end thereof is connected to the transmitting circuit 111 via a first resistor R _1. The other end of the transmission antenna 112 is grounded. In addition, the part of the same name as Embodiment 1 is shown with the same code | symbol as Embodiment 1. FIG.

  In the passive keyless entry system S according to the third embodiment, the control device 10 causes the transmitter 11 to transmit a request signal (for example, several tens of kHz to 30 MHz in the LF band to the HF band) from the transmission antenna 112 by the transmission circuit 111. In the portable device 20, when the receiving unit receives a request signal from the transmitter 11 of the control device 10, the transmitting unit returns a pulsed response signal (for example, 300 MHz band). Then, when the receiver 12 receives the response signal from the portable device 20, the control device 10 authenticates the ID of the response signal by the switching controller 13, and locks and unlocks based on the response signal. The lock / unlock state is switched between the states. In addition, the control device 10 determines whether the switching controller 13 is locked based on information from the door lock mechanism 30, whether the door is closed based on information from the door opening / closing sensor 40, and an ignition switch. Whether or not a key is inserted is detected based on information from 50.

  Hereinafter, the switching control of the locked / unlocked state in the control device 10 will be described in detail based on the flowchart shown in FIG.

  In Step C1, it is determined whether or not a key is inserted. If YES, the process proceeds to Step C2, and if NO, the process returns to Step C1 again.

  In Step C2, it is determined whether or not the door is closed. If YES, the process proceeds to Step C3. If NO, the process returns to Step C1.

  In Step C3, it is determined whether or not the door is locked. If YES, the process proceeds to Step C4. If NO, that is, if the door is unlocked, the process proceeds to Step C9.

  In step C4, the request signal is transmitted and the process proceeds to step C5.

  In step C5, it is determined whether or not the receiver 12 has received a response signal for ID authentication from the portable device 20, that is, whether or not the control device 10 is communicating with the portable device 20 associated therewith. If YES, the process proceeds to Step C6. If NO, the process proceeds to Step C10.

  In step C6, 1 is added to the cumulative number of receptions and the process proceeds to step C7.

  In step C7, it is determined whether or not the cumulative number of receptions matches a specified number of receptions (for example, three times). If YES, the process proceeds to step C8, and if NO, the process returns to step C4. At this time, in the case of YES, the first switching condition in which the cumulative number of receptions of the ID-authenticated response signal matches the specified number of receptions, that is, the ID-authenticated response signal is continuously received by the specified number of receptions. Is satisfied.

  In step C8, the door locking state is switched to the unlocking state, and the process proceeds to step C9.

  In step C9, the cumulative number of receptions is reset to 0 and the process returns to step C1.

  On the other hand, in step C10, the request signal is transmitted and the process proceeds to step C11.

  In step C11, after the receiver 12 receives the response signal for ID authentication from the portable device 20, it is further determined whether or not the same response signal for ID authentication is not received. If YES, the process proceeds to step C12. If NO, return to step C10 again. At this time, in the case of YES, it means that the response signal for ID authentication is not received, that is, the second switching condition that the response signal for ID authentication is not received even once is satisfied. This second switching condition is different from the condition opposite to the first switching condition.

  In Step C12, the unlocked state of the door is switched to the locked state, and the process returns to Step C1.

  Other configurations are the same as those of the first embodiment.

  According to the passive keyless entry system S according to the third embodiment, in the locked state, when a predetermined first switching condition is satisfied, that is, when a response signal that is ID-authenticated is continuously received a predetermined number of times. In the unlocked state, on the other hand, when the second switching condition different from the condition opposite to the first switching condition is satisfied, that is, when the response signal for ID authentication is not received even once. Since switching to the locked state, there is a boundary condition in each of switching from the locked state to the unlocked state and switching from the unlocked state to the locked state, and therefore when switching control of the switching state is performed with a single boundary condition Thus, the switching is not repeated continuously in the vicinity of the boundary condition, and therefore the locked / unlocked state is switched under the boundary condition of both the first and second switching conditions. It can be performed in a stable manner.

(Other embodiments)
In the first to third embodiments, the passive keyless entry system S of the door lock mechanism 30 is used. However, the present invention is not limited to this. It may be an engine starter that starts the engine inside and stops the engine outside a wide area (turbo timer), mirror opening / closing, window glass opening / closing, air conditioner ON / OFF switching system for other vehicle electrical equipment. It may also be a switching system for entrance / exit management of offices other than electrical equipment for vehicles, locking / unlocking of entrances of houses, automatic doors of condominium entrances, etc. RFID (individual identification by radio wave) switching system may be used.

In the first and second embodiments, it became the portable device 20 is present in a narrow first area A ₁ and the first switching condition, and a wide range from the portable device 20 includes a first area A ₁ The second switching condition that is different from the condition opposite to the first switching condition is that it is present outside the second area A _{2. In the} third embodiment, a response signal for ID authentication is used in the third embodiment. Is received for the specified number of receptions continuously, and the second switching condition different from the condition opposite to the first switching condition is that no response signal that is ID-authenticated is received even once. However, the present invention is not particularly limited thereto, and may be a combination of other first switching conditions and a combination of second switching conditions different from the conditions opposite to the first switching conditions.

  The present invention is useful for switching systems.

S Passive keyless entry system (switching system)
DESCRIPTION OF SYMBOLS 10 Control apparatus 11 Transmitter 12 Receiver 13 Switching controller 20 Portable apparatus 30 Door lock mechanism (electric equipment for vehicles)
40 Door open / close sensor 50 Ignition switch 111 Transmitter circuit 112 Transmitter antenna 113 Ground switch 114 Voltage variable circuit

Claims (4)

A control device having a transmitter for transmitting a request signal;
A portable device that returns a response signal when receiving a request signal from the transmitter of the control device;
A switching system comprising:
The control device includes a receiver that receives a response signal from the portable device, and a switch that switches and controls a switching state between a first switching state and a second switching state based on the response signal received by the receiver. A controller, and
The transmitter of the control device transmits a request signal with a relatively weak magnetic field in the first area including the control device in the first switching state, and includes the first area in the second switching state. Configured to transmit a request signal in a relatively strong magnetic field within a wide second area;
In the first switching state , the switching controller of the control device switches the switching state to the second switching state when detecting that the portable device is present in the first area, A switching system configured to switch the switching state to the first switching state when it is detected that the portable device is located outside the second area in the second switching state . The switching system according to claim 1 , wherein
The switching controller of the control device is configured to enable a long-distance communication of a request signal transmitted to the transmitter in the second switching state than a request signal transmitted in the first switching state. Switching system. In the switching system according to claim 1 or 2 ,
A switching system in which the control device is mounted on the vehicle and switches and controls the switching state of the vehicle electrical equipment. The switching system according to claim 3 , wherein
The vehicle electrical device is a door lock mechanism, wherein the first switching state is a locked state and the second switching state is an unlocked state.

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