JP4665600B2 - Equipment control system - Google Patents

Description

  The present invention relates to a device control system that communicates with a device wirelessly.

  In the field of wireless communication, which is often driven by a battery, energy saving is a major issue, and a method of reducing the communication frequency when radio waves are not received has been proposed (see, for example, Patent Document 1).

In Patent Document 1, in a system in which a radio is provided between a vehicle (bus) and a base station (stop) to manage the operation of the vehicle, when the base station receives radio waves from the vehicle, the base station receives radio waves from the vehicle. Is written to switch the power-on frequency of the receiving circuit.
Japanese Patent Laid-Open No. 9-50594

  However, Patent Document 1 only changes the power-on frequency of the receiving circuit depending on whether or not it receives radio waves, and can save energy when communication is not possible. Not considered.

  For example, as in the present invention, if there is a point to combine switching the communication distance by controlling the radio field intensity of communication and changing the time interval of periodic transmission, when communicating Even in this case, energy saving is possible. In general, energy saving often results in a decrease in the feeling of use as a price, but the present invention also attempts to improve that point.

  Therefore, in order to solve the conventional problem, the device control system of the present invention and the program thereof each include a transmission / reception means capable of controlling a communication distance stepwise in a terminal and a device, and the terminal includes the device. When transmitting a signal periodically, the signal transmission interval is changed according to the communication distance.

  As a result, the time interval of periodic communication is changed according to the distance between the terminal and the device, so that unnecessary communication is reduced in the terminal that constantly communicates with the power source of the built-in battery, thus saving energy. To help extend the life of the built-in battery of the terminal.

  For example, when the distance between the terminal and the device is long (close), it is possible to save energy by increasing the regular signal communication interval. Also, as the distance gets closer (away), the transmission interval is shortened and the communication between the terminal and the device is made dense, so that the accuracy of communication distance control can be improved or the real-time nature of the communication content can be improved. The feeling of use is not impaired because it is possible.

  In the device control system, the first invention includes transmission and reception means capable of controlling the communication distance in stages in each of the terminal and the device, and when the terminal periodically transmits a signal to the device, The transmission interval of the signal is changed according to the communication distance.

  As a result, the time interval of periodic communication is changed according to the distance between the terminal and the device, so that the terminal that constantly communicates with the power source of the built-in battery reduces unnecessary communication, thereby saving energy. Can contribute to extending the life of the built-in battery of the terminal.

  For example, when the distance between the terminal and the device is long (close), it is possible to save energy by increasing the regular signal communication interval. Also, as the distance gets closer (away), the transmission interval is shortened and the communication between the terminal and the device is made dense, so that the accuracy of communication distance control can be improved or the real-time nature of the communication content can be improved. The feeling of use is not impaired because it is possible.

  According to a second aspect of the invention, particularly in the device control system of the first aspect of the invention, the transmission / reception means is contact distance communication capable of communication in a contact distance state (for example, within several centimeters), and an approach distance (for example, several Within 10 centimeters), close range communication that can be further communicated within a short distance (for example, within a few tens of centimeters of 1 meter), and medium distance that is further away (for example, within a few meters) The communication distance is controlled by switching at least two or more of medium-distance communication that can be communicated with a long-distance communication, and long-distance communication that can be performed over a long distance (for example, within several tens of meters).

  As a result, the distance between the terminal and the device is divided in stages, and the regular communication time interval is changed according to the distance (for example, the shorter the distance, the shorter the time interval). In the terminal, the unnecessary communication is reduced (or it is detected with high accuracy at a short distance), so that energy is saved and the life of the built-in battery of the terminal is extended.

  According to a third aspect of the invention, in the device control system of the first aspect of the invention, the terminal includes a vibration detection unit, and when the vibration is detected by the vibration detection unit, the terminal is activated and periodically transmits a signal. When no vibration is detected within a certain period of time, the terminal pauses so as not to send a signal.

  As a result, when a person is wearing the terminal or holding it in hand and the terminal continues to receive a certain amount of vibration, the terminal is activated, so it periodically sends a signal to communicate with the device. When the terminal is left somewhere, it stops and does not send a signal.

  In other words, it works effectively as a device control system and enjoys convenience only when moving with the person who is the owner, but if it leaves the owner's hand and is simply left on the desk, it will be cut off from the device control system. In addition, it contributes to energy saving of the terminal (battery life is extended when it is stopped).

  A fourth invention is a program for causing a computer to execute at least one means or operation, particularly in the device control system of any one of the first to third inventions, and includes a CPU, RAM, ROM, storage device, and I / O. A part or all of the present invention can be easily realized as a program by cooperating hardware resources such as an electric information device, a computer, and the like. Also, by distributing the program on a recording medium or using a communication line, program distribution can be realized very easily compared to other means.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.
(Embodiment 1)
The terminal is owned by each individual, has a different ID for each individual, and is assumed to be always carried by the individual, and has a shape that is not troublesome to carry (for example, pendant type, key holder type, card type) ) And is assumed to be very small and lightweight. By only having this terminal, various services (functions) are provided according to the distance from the device.

  In the following explanation, the distance between the terminal and the device is classified into five stages, and each is classified as a long distance mode, a medium distance mode, a short distance mode, an approach distance mode, and a contact distance mode (of course, five stages). Is an example, and it doesn't matter if there are more than two levels).

  First, the system configuration will be described. FIG. 1 is a diagram showing an example of a device control system configuration according to the present embodiment. In FIG. 1, a terminal 1000 is a terminal for a person to carry and move, and it is assumed that the terminal 1000 communicates with a device 2000 installed in a home by low power radio.

  The terminal 1000 includes a first transmission / reception unit 100, a first control unit 110 that controls the whole including the first transmission / reception unit, a vibration detection unit 120, a trigger generation unit 130, and a timer switching unit described later. .

  The vibration detection means 120 is composed of, for example, a spring and an electrical contact (not shown). When a person wears the terminal or is held in the hand and the terminal 1000 is subjected to a certain amount of vibration, the vibration detection means 120 is electrically connected to the spring. The electrical contacts come into contact with each other and send an electrical signal to the first control means 110. After receiving the electrical signal, the control means 110 is activated for a certain period of time, and the first control means 100 periodically sends a signal. To communicate with the device 2000.

  On the contrary, when the terminal 1000 is left somewhere, the spring and the electrical contact do not come into contact with each other, so that the electrical signal is not transmitted, and the first control unit 110 pauses after a certain time (pause). ), The signal that was periodically transmitted from the first control means 100 is not transmitted, and the communication to the device 2000 is interrupted.

  In this way, the device 2000 recognizes the presence of the terminal 1000 based on the signal periodically transmitted by the terminal 1000, and estimates the distance between the two and performs the optimum service at that time. However, since the terminal 1000 is battery-driven like a built-in battery, it is essential to consider energy saving for improving battery life.

  For this reason, the terminal 1000 communicates with the device 2000 only when the terminal 1000 is moving with the person who is the owner by such a device, so that it can effectively work as a device control system and enjoy convenience. If the device is left alone on the desk or the like, it is disconnected from the device control system and the terminal 1000 is also energy-saving (the sleep is a power-saving state and communication is not performed, so the battery life is extended). To contribute.

  The configuration of the vibration detection unit 120 is not limited to the above.

  Further, here, the transmission interval of signals periodically transmitted by the control means 100 of the terminal 1000 is controlled with the aim of energy saving for improving battery life.

  In other words, in FIG. 1, the trigger generating means 130 generates a trigger for designating the periodic signal transmission timing, and the inside thereof is composed of five timers 131 to 135 corresponding to the distance mode. The output is input as a trigger to the first control unit 110 via the timer switching unit 140, and the first control unit 110 transmits a periodic signal from the first transmission / reception unit 100 in synchronization with the trigger. .

FIG. 5 is a diagram showing an example of the distance mode and the regular signal transmission interval. As shown in FIG. 5, the five timers are as follows.
1) Contact distance timer (0.1 second cycle) for use in contact distance mode (communication distance of several centimeters)
2) Approach distance timer (0.5 second cycle) for use in approach distance mode (communication distance of several tens of centimeters)
3) Short-distance timer (1-second cycle) for use in short-distance mode (communication distance 1m tens of centimeters)
4) Medium distance timer (5-second cycle) for use in medium distance mode (communication distance of several meters)
5) A long distance timer (10-second cycle) for use in a long distance mode (communication distance of about several tens of meters).

  The method of switching the distance mode (timing, algorithm) will be described later. When changing the distance mode, communication control (actually, attenuation control of the communication signal, which will be described later) and switching of the timer described above. Control is performed simultaneously.

  That is, when the long-distance mode is set, the communication is set to the long-distance communication and the timer is switched to the long-distance timer.

  Similarly, in the case of the medium distance mode, the short distance mode, and the like, similarly, when the respective modes are set, the communication and the timer are switched according to the distance.

  Next, the device side will be described.

  In FIG. 1, the device 2000 is controlled by a second transmission / reception unit 200 that communicates with the first transmission / reception unit 100, a second control unit 210 that controls the entire device including them, and a second control unit 210. A notification unit 220 that performs various notifications and a device-specific operation unit 230 that performs a device-specific operation are provided.

  The device-specific operation mentioned here is, for example, lighting operation for a lighting device, video / audio output operation for a television, audio / sound output operation for a radio, or desk lighting for a desk lamp. Operation, heating operation for a heater, cooking operation for a cooker, locking operation for an electric key, or unlocking operation. The means for performing these operations is referred to as device-specific operation means 230.

  The terminal 1000 and the device 2000 perform wireless communication, but the basic state is the long-distance mode, and the first transmitting / receiving unit 110 transmits a signal at regular intervals (for example, 10 seconds). This signal includes ID code information unique to each terminal stored in the first control means 110.

  The second transmission / reception means 200 of the device 2000 receives this signal, and the second control means 210 performs processing. The ID code stored in the second control means 210 and the family corresponding to the ID code. The device 2000 detects that the family member is in the long-distance area.

  Note that the device 2000 is at least one or more types of one or more devices that are present in the home as described above, and these devices are each independently described above. The operation is performed, and the second control unit 210 controls to notify from the notification unit 220 as necessary, or the device-specific operation unit 230 starts (stops) the original operation of the device.

  Next, a communication distance control method will be described with reference to FIG.

  FIG. 2 is a diagram showing a detailed internal configuration of the first transmission / reception unit 100 and the second transmission / reception unit 200.

  In FIG. 2, the first transmission / reception unit 100 includes a first attenuation unit 10 (attenuating a transmission signal), a first transmission unit 11, a first reception unit 12, and a first transmission / reception control unit 13. The second transmitting / receiving unit 200 includes a second attenuating unit 20 (attenuating the received signal), a second transmitting unit 21, a second receiving unit 22, and a second transmitting / receiving unit. And a control means 23.

The first attenuation means 10 and the second attenuation means 20 can change the intensity of attenuation by external control, and the attenuation intensity is changed stepwise in each attenuation means. For example, the communication (method) can be changed depending on the strength of radio waves as follows.
1) Long-distance communication (no attenuation) that enables communication within several tens of meters
2) Medium distance communication (medium attenuation) that can be communicated within a few meters
3) Short-distance communication (attenuation is slightly strong) that can be communicated within 1 meter and several tens of centimeters
4) Proximity communication (strong attenuation) that can be communicated within tens of centimeters
5) Contact distance communication (the strongest attenuation) that can only be communicated within a few centimeters.

  A sufficient effect can be obtained only by the first attenuation means 10, but the second attenuation means 20 may be used at the same time in order to realize stricter contact distance communication (for example, several millimeters or less). .

  Here, even if the communication is only attenuated by contact distance communication due to attenuation, the transmission signal of the second transmission / reception means 200 and the first transmission / reception device 100 can be restored to the long distance communication mode without any problem. The received signal can be communicated without being attenuated at all.

  In other words, since the transmission signal of the second transmission / reception means 200 can always communicate with the first transmission / reception apparatus 100 by long-distance communication (without any attenuation), the second transmission / reception means 200 In response to this instruction, the first transmitter / receiver 100 can control the first attenuation means 10 to change the intensity of the radio wave of the transmission signal of the first transmitter / receiver 100.

  Next, the mechanism of the switching operation of (five) distance modes between the terminal 1000 and the device 2000 will be described with reference to FIGS. 3, 4, and 5.

  (1) First, the case where the terminal 1000 approaches the device 2000 will be described. FIG. 3 shows a flow of processing performed by the second control unit 210 of the device 2000.

  As described above, the terminal 1000 and the device 2000 send a signal every certain time (for example, every 10 seconds in the long-distance mode). The device 2000 constantly monitors this signal, and the device 2000 sends this signal. Is received (S500), it detects that the terminal 1000 has entered the long-distance area and performs a specific operation (S510).

  At this time, the second transmission / reception means 200 of the device 2000 receives the ID code included in the signal, the second control means 210 performs processing, and the ID code stored in the second control means 210 and It is also possible to acquire information related to the family name corresponding to the ID code, detect that a family member has entered a long-distance area, and perform a unique operation that takes into account personal information ( Not shown).

  In addition, an article may correspond to an ID code, and a family may be associated with a particular article.

Next, the terminal 1000 is instructed to set to the medium distance mode (S530).
Setting to the medium distance mode means that the communication is set to the medium distance communication and the timer used as a periodic signal generation trigger is switched to the medium distance timer 134. Here, the signal interval transmitted by the terminal 1000 is set to 5 for example. Change to seconds.

  Next, it is monitored whether the device 2000 receives a signal from the terminal 1000 within a predetermined time. If no signal is received (S540), the long-distance mode which is the original state is set (S520).

  Setting the long-distance mode means that the communication is long-distance communication and the timer used as a periodic signal generation trigger is also switched to the long-distance timer 135. Here, the signal interval transmitted by the terminal 1000 is set to 10 for example. Change to seconds (FIG. 5).

  If communication is possible even in the medium distance mode (S540), it is determined that the terminal 1000 has entered the range of the medium distance mode, and a unique operation can be performed (S550).

  In this state, assuming that the terminal 1000 further approaches, the device 2000 sets the short distance mode for the terminal 1000 (S560).

  Setting the short-distance mode means that the communication is set to the short-distance communication mode, and the timer used as a periodic signal generation trigger is also switched to the short-distance timer 133. Here, the signal interval transmitted by the terminal 1000 is, for example, Change to 1 second (FIG. 5).

  Next, a signal sent from the terminal 1000 at regular intervals is monitored, and when this signal is detected (S570), it can be detected that the terminal 1000 is at a short distance, so that a unique operation is performed (S580). ).

  Similarly, assuming that the terminal 1000 is further approaching in this state, the device 2000 sets the approach distance mode to the terminal 1000 (S590).

  Setting the approach distance mode means that the communication is close distance communication, and the timer used as a periodic signal generation trigger is switched to the approach distance timer 132. Here, the signal interval transmitted by the terminal 1000 is set to 0, for example. Change to 5 seconds (Figure 5).

  Next, a signal sent from the terminal 1000 at regular intervals is monitored, and when this signal is detected (S600), it can be detected that the terminal 1000 is at an approaching distance, so that a unique operation is performed (S610). ).

  Finally, assuming that the terminal 1000 is close to a distance where the terminal 1000 comes into contact with the device 2000, the device 2000 sets the terminal 1000 in the contact distance mode (S620).

  Setting to the contact distance mode means that the communication is set to the contact distance communication mode, and the timer used as the periodic signal generation trigger is switched to the contact distance timer 131. Here, the signal interval transmitted by the terminal 1000 is, for example, Change to 0.1 seconds (FIG. 5).

  Next, a signal sent from the terminal 1000 at regular intervals is monitored, and when this signal is detected (S630), a unique operation is performed when the terminal 1000 approaches the device 2000 (S640). .

  A typical example of the operation in the contact distance mode is an automatic locking or unlocking device in which the device 2000 is installed at the entrance door, and the terminal 1000 is brought into contact with the entrance door (device 2000), for example. It is also possible to unlock the door lock (not shown).

  That is, when the terminal 1000 returns to the front of the door, the second control means 210 provided in the entrance door (device 2000) controls the door locking / unlocking means (device-specific operation means 230) to lock the door. Auto unlock service such as opening is possible. Such a service such as auto-unlocking tends to deteriorate the usability particularly when the response is poor. Therefore, it is preferable that the signal interval transmitted by the terminal 1000 is short (for example, every 0.1 second).

  Up to this point, it has been described that the terminal 1000 shifts to the long-distance mode, the medium-distance mode, the short-distance mode, the approach-distance mode, and the contact-distance mode on the assumption that the terminal 1000 is approaching. For example, the device 2000 monitors the signal sent from the terminal 1000 at regular intervals, and resets if the signal is not detected after a certain period of time. It is also effective to return to the long-distance mode and perform re-partitioning from the beginning (S500) to prevent an unintended operation (not shown). In addition, when the device 2000 is an entrance door, it is conceivable to lock the door key unlocked in the contact distance mode again.

  (2) Next, a case where the terminal 1000 moves away from the device 2000 will be described. FIG. 4 shows a flow of processing performed by the second control unit 210 of the device 2000.

  Here, as in (1), the terminal 1000 and the device 2000 send signals at regular intervals (for example, 0.1 seconds in the contact distance mode), and the device 2000 constantly monitors this signal. When the device 2000 receives this signal (Y in S700), the monitoring is continued as it is (S700), and when the device 2000 does not receive this signal (N in S700), it is determined that the terminal 1000 has left the contact area. Thus, a unique operation can be performed (S710).

  At this time, the second transmission / reception means 200 of the device 2000 receives the ID code included in the signal, the second control means 210 performs processing, and the ID code stored in the second control means 210 and It is also conceivable to acquire information related to the family name corresponding to the ID code, detect that it is a family member, and perform a unique operation in consideration of personal information (not shown).

  In this case as well, the item corresponding to the ID code may be an item, and the family may be associated with a specific item.

  Next, the terminal 1000 is instructed to set the approach distance mode (S730). Since the contents to be set in the approach distance mode setting have been described so far, they are omitted. However, the approach distance timer 132 is switched to transmit a periodic signal at intervals of 0.5 seconds.

  Next, it is monitored whether the device 2000 receives a signal from the terminal 1000 within a predetermined time. If the signal is received (Y in S740), the terminal 1000 is set in the contact distance mode.

  Next, if no repetitive signal is received from the beginning (S700) (N in S740), it is detected that the terminal 1000 has left the approaching distance region (entering a short distance), and a specific operation is performed (S750). .

Next, the terminal 1000 is instructed to set the short distance mode (S760).
Since the contents to be set in the short distance mode setting have been described so far, they will be omitted.

  Next, it is monitored whether the device 2000 receives a signal from the terminal 1000 within a predetermined time. If the signal is received (Y in S770), the process returns to S730, and if no signal is received (N in S770), the terminal It detects that 1000 has left the short distance area (entering the middle distance) and performs a specific operation (S780).

Next, the terminal 1000 is instructed to set to the medium distance mode (S790).
Since the contents to be set in the medium distance mode setting have been described so far, they are omitted, but the medium distance timer 134 is switched to transmit a periodic signal at intervals of 5 seconds.

  Next, it is monitored whether the device 2000 receives a signal from the terminal 1000 within a predetermined time. If the signal is received (Y in S800), the process returns to S760, and if no signal is received (N in S800), the terminal It detects that 1000 has left the middle distance area (entering the long distance area) and performs a specific operation (S810).

Next, the terminal 1000 is instructed to set the long-distance mode (S820).
Since the contents to be set in the long-distance mode setting have been described so far, they will be omitted.

  Next, it is monitored whether the device 2000 receives a signal from the terminal 1000 within a predetermined time. If the signal is received (Y in S830), the process returns to S790, and if no signal is received (N in S830), the terminal It detects that 1000 has left the far-and-near distance area (communication is impossible or out of service area) and performs a specific operation (S840).

  Note that the terminal 1000 holds a unique ID code in the first control unit 110 and is assumed to be able to communicate only with a specific device 2000. For this purpose, the second control unit 210 is used. The ID code is also stored inside and the code authentication is performed. However, the number of terminals 1000 is not limited to one, and a plurality of terminals 1000 each having a different unique ID code are connected to only one device 2000. Communication may be possible, and there may be a plurality of devices 2000.

In the description so far,
Long-distance communication (no attenuation) that enables communication within several tens of meters,
Medium distance communication (medium attenuation) that can be communicated within a few meters,
Short-distance communication (a little strong attenuation) that can be communicated within 1 meter and several tens of centimeters,
Proximity communication (strong attenuation) that can only be communicated within tens of centimeters
Contact distance communication that can only communicate within a few centimeters (strongest attenuation)
However, there is no need to be concerned with this.

  That is, there is no problem even if it is replaced with a form such as a medium distance communication that does not exceed several kilometers as a long distance communication or a form such as a medium distance communication that does not exceed several meters as a long distance communication. Also, the periodic signal transmission interval may be set to a value different from that in FIG.

  Furthermore, it is conceivable that the terminal 1000 itself makes some judgment and changes the periodic signal transmission interval. That is, when a certain mode continues for a certain time or longer (for example, 15 minutes), the first control unit 110 of the terminal 1000 is out of service area (away from the device 2000) or moved (the terminal 1000). Therefore, it is effective for energy saving to determine that it is not necessary to transmit a regular signal on a small basis and to independently extend the signal interval transmitted by the terminal 1000 (not shown). In particular, when the long-distance mode continues for a long time, there is a high possibility of being out of service area, so it is possible to set a long interval such as an interval of 50 seconds (not shown).

  Note that the means described in this embodiment causes hardware resources such as a CPU (or microcomputer), a RAM, a ROM, a storage / recording device, an electrical / information device including an I / O, a computer, a server, and the like to cooperate. You may implement with the form of a program. In the form of a program, new functions can be easily distributed / updated and installed by recording them on a recording medium such as magnetic media or optical media, or distributing them using a communication line such as the Internet.

  In this embodiment, the low power wireless communication is described, but the present invention is not limited to this.

  As described above, it has been described that various services (functions) are provided only by having the terminal 1000 depending on the distance from the device 2000. However, the terminal according to the present embodiment can be moved by a car or a bicycle. You may prepare for a means. The terminal 1000 may be built in the mobile phone, and the device 2000 may be an office, a school, or the like, or may be equipped in a car.

  In the first embodiment, the first transmission / reception means may be provided on the device 2000 side, and the second transmission / reception means may be provided on the terminal 1000 side.

  Further, the circuit configuration for performing stepwise control of the communication distance is not limited to FIG.

  In this embodiment, the example in which the transmission interval of the periodic signal is shortened as the communication distance is shortened has been described. However, the reverse, that is, the transmission interval of the periodic signal is shortened as the communication distance is increased. It is also possible to make it.

  Moreover, although the example which transmits regularly with respect to an apparatus from the terminal side demonstrated, it can utilize also when transmitting regularly with respect to the terminal side from the apparatus side.

  As described above, the device control system and its program according to the present invention have transmission / reception means capable of controlling the communication distance step by step in the terminal and the device, respectively. It is possible to perform the optimal operation according to the distance between the terminal and the device, and the electric device automatically starts the operation according to the distance from the terminal. Or, by stopping the operation, it is possible to automatically control the device without being aware of the device control, such as a human operation every time, so comfort, convenience, or safety Can be expected to improve energy efficiency and contribute to energy conservation.

  It can be used for remote control in offices, factories, public facilities, etc. as well as at home.

1 is a diagram showing an example of a device control system configuration according to Embodiment 1 of the present invention. FIG. 3 is an example of a detailed internal configuration of the first transmission / reception unit and the second transmission / reception unit in the first embodiment of the present invention. An example of a flow of processing performed by the second control unit 210 according to Embodiment 1 of the present invention when the terminal 1000 approaches the device 2000 An example of a flow of processing performed when the terminal 1000 moves away from the device 2000 performed by the second control unit 210 according to Embodiment 1 of the present invention. An example figure which shows the relationship between the distance mode in Embodiment 1 of this invention, and a periodic signal transmission interval.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st attenuation means 11 1st transmission means 12 1st reception means 13 1st transmission / reception control means 20 2nd attenuation means 21 2nd transmission means 22 2nd reception means 23 2nd transmission / reception control means 100 First transmission / reception means 110 First control means (holds a unique ID code)
DESCRIPTION OF SYMBOLS 120 Vibration detection means 130 Trigger generation means 131 Contact distance timer 132 Approach distance timer 133 Short distance timer 134 Medium distance timer 135 Long distance timer 140 Timer switching means 200 2nd transmission / reception means 210 2nd control means (pre-registered specification) Only authenticate ID code)
220 Notification unit 230 Device-specific operation unit 1000 Terminal 2000 Device

Claims (2)

Each of the terminal and the device is equipped with transmission / reception means capable of controlling the communication distance in stages using attenuation means ,
When the terminal periodically transmits a signal to the device, the transmission interval of the signal is changed according to the communication distance ,
The transmission / reception means uses the attenuation means, and at least
Contact distance communication capable of communicating in a contact distance state where the distance between the devices is within several centimeters,
Proximity distance communication capable of communicating in an approach distance state in which the distance between the devices is within several tens of centimeters;
Near field communication capable of communicating in a near field state where the distance between the devices is within a few tens of centimeters,
Medium-range communication capable of communicating in a medium-range state in which the distance between the devices is within a few meters;
Long-distance communication capable of communicating in a long-distance state where the distance between the devices is within several tens of meters,
A device control system characterized in that the communication distance is controlled by switching . The terminal is equipped with vibration detection means, and when the vibration is detected by the vibration detection means, the terminal is activated and periodically transmits a signal, and if no vibration is detected within a certain time, the terminal is suspended. The apparatus control system according to claim 1 , wherein no signal is transmitted.

Images