JP2015008376A - Radio communication device, communication object identifying method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication device and the like that are able to identify a communication object among a plurality of radio communication devices.SOLUTION: A first distance acquisition unit 311 of a radio communication device acquires a first distance between two management devices and a radio communication device from reception radio wave strength. A second distance acquisition unit 312 acquires a second distance between each management device and the radio communication device from the reception radio wave strength. A sensor position acquisition unit 313 acquires a third distance between each management device and sensor terminals from each management device, and determines the position of each sensor terminal on the basis of a preset channel of each sensor terminal. A photographing position determination unit 314 determines the position of the radio communication device on the basis of the preset position of each management device, the first distance, the positions of the sensor terminals, and the second distance between the sensor terminals and the radio communication device. A communication object identifying unit 315 identifies a sensor terminal in a direction detected by a direction detection unit 360 from the position of the radio communication device as a communication object of the radio communication device.

Description

  The present invention relates to a wireless communication device, a communication target specifying method, and a program for specifying a communication target from among a plurality of wireless communication devices.

  Conventionally, for example, an augmented reality system described in Patent Document 1 is an augmented reality technology that displays a fusion of a real space and a virtual space. In this system, when a plurality of types of preset markers are stored in a mobile terminal and an arbitrary marker selected by the user is displayed on the display unit of the mobile terminal, an image including the marker is captured. A virtual object corresponding to the marker is synthesized and displayed in the photographed image at the arranged position.

JP 2005-250950 A

  However, in the technique described in Patent Document 1, in order to communicate with each of a plurality of mobile terminals provided with markers, it is necessary to identify the plurality of mobile terminals by providing different markers for each. Therefore, for example, when there are a plurality of wireless communication devices provided with the same marker, it is difficult to specify a communication target from among them.

  The present invention has been made in view of such problems, and an object thereof is to provide a wireless communication device, a communication target specifying method, and a program capable of specifying a communication target from among a plurality of wireless communication devices. And

In order to achieve the above object, a wireless communication apparatus according to the present invention provides:
A wireless communication device connected to two first wireless communication devices and a plurality of second wireless communication devices so as to be capable of wireless communication,
A position storage unit for storing the position of each of the two first wireless communication devices;
A position acquisition unit that acquires the position of each of the plurality of second wireless communication devices;
A first distance acquisition unit that acquires a first distance between each of the two first wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
A second distance acquisition unit that acquires a second distance between each of the plurality of second wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
The position of each of the two first wireless communication devices, the first distance, the position of at least one second wireless communication device, and the at least one second wireless communication device and the wireless communication device A first position specifying unit for specifying the position of the wireless communication device based on the second distance between;
An orientation detection unit for detecting a direction in which a predetermined surface of the wireless communication device faces;
Based on the position of the wireless communication device, the direction detected by the azimuth detecting unit, and the position of each of the plurality of second wireless communication devices, the wireless communication device can select the wireless communication device from the plurality of second wireless communication devices. A communication target specifying unit for specifying a target for wireless communication with the communication device;
It is characterized by providing.

  According to the present invention, a communication target can be specified from among a plurality of wireless communication devices.

It is the schematic showing the usage example of the radio | wireless communications system which concerns on embodiment. (A) And (b) is the front view and back view of a radio | wireless communication apparatus, respectively. It is a block diagram which shows roughly the hardware structural example of the sensor terminal which concerns on this embodiment, a management apparatus, and a radio | wireless communication apparatus. It is a figure which shows an example of the data stored in the management apparatus position table. It is a figure which shows an example of the data stored in the channel setting table. It is a figure for demonstrating an example of the setting method of a channel. It is a block diagram showing the functional structure of the control part of a radio | wireless communication apparatus. It is a figure for demonstrating an example of the position specific method of the sensor terminal by a sensor position specific part. It is a figure for demonstrating an example of the position specifying method of the radio | wireless communication apparatus by an imaging position specific | specification part. It is a figure for demonstrating an example of the communication target specific method by a communication target specific part. It is a figure for demonstrating an example of the communication target specific method by a communication target specific part. It is a flowchart which shows an example of the flow of the communication target specific process which the control part of a radio | wireless communication apparatus performs.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a usage example of the wireless communication system 1 according to the first embodiment. FIG. 1 is a top view of a room R as viewed from above. In the room R, sensor terminals (first wireless communication devices) 100a to 100d constituting the wireless communication system 1 and a management device (second wireless communication) are shown. Apparatus) 200a, 200b and a wireless communication apparatus 300 are arranged. The sensor terminals 100a to 100d, the management devices 200a and 200b, and the wireless communication device 300 are connected to be communicable with each other wirelessly.

  The sensor terminals 100 a to 100 d are terminal devices that transmit sensed data to the wireless communication device 300. The sensor terminals 100a to 100d are provided with markers 101a to 101d on their upper surfaces. 1 is provided with the same markers 101a to 101d, but the markers provided on the sensor terminals 100a to 100d may be different from each other, or the sensor terminals 100a to 100d may be different from each other. A part of 100d may be provided with the same marker. Further, in FIG. 1, four sensor terminals 100a to 100d are illustrated, but the number of sensor terminals 100a to 100d is not limited thereto. The sensor devices 100a to 100d are configured in the same manner. In the following description, the sensor terminals 100a to 100d are collectively referred to as the sensor terminal 100. The detailed configuration of the sensor terminal 100 will be described later.

  The management devices 200a and 200b transmit or receive wireless signals for specifying the positions of the sensor terminal 100 and the wireless communication device 300. The management devices 200a and 200b are configured in the same manner. In the following description, the management devices 200a and 200b are collectively referred to as the management device 200. A detailed configuration of the management apparatus 200 will be described later.

  The wireless communication device 300 identifies the sensor terminal 100 to be communicated among the plurality of sensor terminals 100 and performs wireless communication with the identified sensor terminal 100.

  FIG. 2 shows an example of the appearance of the wireless communication device 300. 2A and 2B are a front view and a rear view of the wireless communication device 300, respectively. As illustrated in FIG. 2A, a display unit 350 described later is provided on the front surface of the wireless communication device 300. Further, as shown in FIG. 2B, an imaging unit 330 described later is provided on the back surface of the wireless communication device 300, and an image captured by the imaging unit 330 is displayed on the display unit 350. In the present embodiment, the wireless communication device 300 includes a sensor terminal 100x that appears in an image displayed on the display unit 350, that is, a sensor terminal that the user desires to communicate as any of the plurality of sensor terminals 100. Specify whether it is a sensor terminal. Then, after specifying the sensor terminal 100x, the wireless communication device 300 receives data detected by the sensor terminal 100 from the sensor terminal 100. The detailed configuration of the wireless communication device 300 will be described later.

  Next, a hardware configuration of the wireless communication system 1 according to the present embodiment will be described. FIG. 3 is a block diagram schematically illustrating a hardware configuration example of the sensor terminal 100, the management device 200, and the wireless communication device 300 according to the present embodiment.

  The sensor terminal 100 includes a control unit 110, a sensor unit 120, and a wireless communication unit 130.

  The control unit 110 controls the entire sensor terminal 100. The control unit 110 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory) (not shown). The CPU executes a program stored in the ROM. The ROM is a non-volatile memory that stores a program or the like for the control unit 110 to control the entire sensor terminal 100. The RAM is a volatile memory for temporarily storing information generated by the control unit 110 and data necessary for generating the information.

  In the present embodiment, the control unit 110 receives a wireless signal from the wireless communication unit 130 in response to a request from the management device 200 or the wireless communication device 300 received via the wireless communication unit 130. Send to. In addition, the control unit 110 transmits data detected by the sensor unit 120 to the wireless communication device 300 via the wireless communication unit 130 in response to a request from the wireless communication device 300.

  The sensor unit 120 includes various sensors such as a temperature sensor, an illuminance sensor, and a moisture amount sensor. The sensor unit 110 outputs the detected data to the control unit 110.

  The wireless communication unit 130 includes a wireless communication interface, and performs wireless communication with the management device 200 and the wireless communication device 300. Further, the sensor terminal 100 is assigned identification information (SSID: Service Set Identifier) for identifying each sensor terminal 100 when performing wireless communication.

  Next, the configuration of the management apparatus 200 will be described. The management apparatus 200 includes a control unit 210 and a wireless communication unit 220.

  The control unit 210 controls the entire management apparatus 200. The control unit 210 includes a CPU, a ROM, and a RAM (not shown). The CPU executes a program stored in the ROM. The ROM is a non-volatile memory that stores a program or the like for the control unit 210 to control the entire management apparatus 200. The RAM is a volatile memory for temporarily storing information generated by the control unit 210 and data necessary for generating the information.

  In the present embodiment, the control unit 210 performs wireless communication with each sensor terminal 100 in response to a request from the wireless communication device 300 received via the wireless communication unit 220 and receives from each sensor terminal 100. From the intensity of the radio wave, a distance (a third distance described later) between the sensor terminal 100 that is the radio wave transmission source and the management apparatus 200 is acquired. Then, the control unit 210 transmits the acquired distance to the wireless communication device 300 via the wireless communication unit 220.

  The wireless communication unit 220 includes a wireless communication interface, and performs wireless communication between the sensor terminal 100 and the wireless communication device 300. The management device 200 is assigned identification information (management ID) for identifying each management device 200 when performing wireless communication.

  Next, the configuration of wireless communication apparatus 300 will be described. The wireless communication apparatus 300 includes a control unit 310, a storage unit 320, an imaging unit 330, an input unit 340, a display unit 350, an orientation detection unit 360, and a wireless communication unit 370.

  The control unit 310 includes, for example, a CPU, a ROM, and a RAM, and performs overall control of the wireless communication device 300. The CPU executes a program stored in the ROM. The ROM is a non-volatile memory that stores a program and the like for the control unit 310 to control the entire wireless communication apparatus 300. The RAM is a volatile memory for temporarily storing information generated by the control unit 310 and data necessary for generating the information.

  The storage unit 320 includes a storage device such as a hard disk drive. Specifically, the storage unit 320 stores a management device position table (position storage unit) 321 and a channel setting table 322.

  The management device position table 321 stores the position of each management device 200 in the room R. FIG. 4 shows an example of data representing the position of each management apparatus 200 stored in the management apparatus position table 321. In the management device location table 321 illustrated in FIG. 4, the location of the management device is stored for each management ID of the management device 200. Here, the position (x, y) of each management apparatus 200 shown in FIG. 4 is represented using the XY coordinate system C shown in FIG. The position of each management device 200 is, for example, measured in advance by the user, and the measured value is input via the input unit 340 and stored in the management device position table 321.

  The channel setting table 322 stores a frequency band (channel) used for wireless communication with each sensor terminal 100. FIG. 5 shows an example of data representing the channel of each sensor terminal 100 stored in the channel setting table 322. In the channel setting table 322 illustrated in FIG. 5, a channel used for Wi-Fi communication with a sensor terminal 100 is stored for each SSID of the sensor terminal 100.

  Here, an example of a channel setting method will be described with reference to FIG. As shown in FIG. 6, the two management devices 200 are arranged so as to be positioned on the diagonal line in the corner of the room R on the rectangle. In this state, the area in the room R in which the sensor terminal 100 is arranged is divided into two areas A1 and A2 with the straight line L connecting the management devices 200 as a boundary line. And the channel allocated to each sensor terminal 100 is set based on the area | region where the sensor terminal 100 is located. Specifically, the sensor terminals 100a and 100c located below the straight line L, that is, located in the area A1, use 1ch as a channel. Further, the sensor terminals 100b and 100d located above the straight line L, that is, located in the area A2, use 11ch as a channel. The channel of each sensor terminal 100 is stored in the channel setting table 322 in association with the SSID of the sensor terminal 100 when, for example, the user inputs the channel via the input unit 340 according to the installation position. Is done.

  The imaging unit 330 includes an imaging element such as a CCD (Charge Coupled Device) sensor, a CMOS (Complementary Metal Oxide Semiconductor) sensor, a lens, an image processing circuit, and the like. As illustrated in FIG. 2B, the imaging unit 330 is provided on the back surface of the wireless communication device 300, acquires an image of an object in the direction in which the back surface is facing, and outputs the acquired image to the control unit 310.

  The input unit 340 includes input devices such as buttons and a touch panel for the user to operate the wireless communication device 300, and receives various types of information input by the user.

  The display unit 350 includes a display device such as a liquid crystal display. The display unit 350 displays and outputs various information and images output by the control unit 310.

  The direction detection unit 360 is configured by, for example, a magnetic sensor, and detects a direction in which the back surface of the wireless communication apparatus 300 is facing, that is, a direction in which the image is captured by the imaging unit 330. Then, the direction detection unit 360 outputs data representing the detected direction to the control unit 310.

  The wireless communication unit 370 includes a wireless communication interface, and performs wireless communication between the sensor terminal 100 and the management apparatus 200.

  Next, a functional configuration of the control unit 310 of the wireless communication apparatus 300 will be described. FIG. 7 is a block diagram illustrating a functional configuration of the control unit 310 of the wireless communication apparatus 300 according to the present embodiment. As illustrated in FIG. 7, the control unit 310 includes a first distance acquisition unit 311, a second distance acquisition unit 312, a sensor position acquisition unit (position acquisition unit) 313, an imaging position specification unit (first position specification unit) 314, It functions as the communication target specifying unit 315.

  The first distance acquisition unit 311 acquires a first distance that is a distance between each management device 200 and the wireless communication device 300. Specifically, the first distance acquisition unit 311 performs wireless communication with each management device 200 by the wireless communication unit 370 and acquires the first distance based on the intensity of the radio wave received from each management device 200. To do.

  The second distance acquisition unit 312 acquires a second distance that is a distance between each sensor terminal 100 and the wireless communication device 300. Specifically, the second distance acquisition unit 312 performs wireless communication with each sensor terminal 100 by the wireless communication unit 370 and acquires the second distance based on the intensity of the radio wave received from each sensor terminal 100. To do.

  The sensor position acquisition unit 313 acquires the position of each sensor terminal 100 in the room R. Specifically, the sensor position acquisition unit 313 includes a third distance acquisition unit 313a and a sensor position specification unit (second position specification unit) 313b.

  The third distance acquisition unit 313a acquires a third distance that is a distance between each sensor terminal 100 and each management device 200. Specifically, the third distance acquisition unit 313a causes wireless communication between each sensor terminal 100 and each management device 200, and causes each management device 200 to receive radio waves received from each sensor terminal 100. Then, the third distance is acquired. Then, the third distance acquisition unit 313a acquires the third distance from each management device 200.

  The sensor position specifying unit 313b specifies the position of each sensor terminal 100 based on the acquired third distance and the channel of each sensor terminal 100 stored in the channel setting table 322.

  Hereinafter, an example of a method for specifying the position of the sensor terminal 100 by the sensor position specifying unit 313b will be described with reference to FIG. For example, the third distance acquisition unit 313a acquires Daa as the third distance between the sensor terminal 100a and the management apparatus 200a, and Dab as the third distance between the sensor terminal 100a and the management apparatus 200b. . In this case, as shown in FIG. 8, the sensor position specifying unit 313b uses two points P1 as candidate positions of the sensor terminal 100a based on the position of each management device 200 and the two third distances Daa and Dab. , P2 is specified.

  Further, since the channel corresponding to the SSID of the sensor terminal 100a stored in the channel setting table 322 is “1”, the sensor position specifying unit 313b is in the area A1 corresponding to the channel “1”. P2 is specified as the position of the sensor terminal 100a.

  The imaging position specifying unit 314 includes the position of each management device 200 stored in the management device position table 321, the first distance acquired by the first distance acquisition unit 311, and each sensor acquired by the sensor position acquisition unit 313. Based on the position of the terminal 100 and the second distance acquired by the second distance acquisition unit 312, the position of the wireless communication apparatus 300 is specified.

  Hereinafter, an example of a method for specifying the position of the wireless communication apparatus 300 by the imaging position specifying unit 314 will be described with reference to FIG. For example, the first distance acquisition unit 311 acquires Dma as the first distance between the wireless communication device 300 and the management device 200a, and Dmb as the first distance between the wireless communication device 300 and the management device 200b. And In this case, as illustrated in FIG. 9, the imaging position specifying unit 314 uses two points as candidate positions of the wireless communication device 300 based on the position of each management device 200 and the two first distances Dma and Dmb. P3 and P4 are specified.

  Further, the imaging position specifying unit 314 includes, for example, the sensor terminal 100a among the plurality of sensor terminals 100, the position of the sensor terminal 100a acquired by the sensor position acquisition unit 313, and the sensor acquired by the second distance acquisition unit 312. From the second distance Dsa between the terminal 100a and the wireless communication device 300, among the two points P3 and P4, P4 that is a distance away from the sensor terminal 100a by Dsa is specified as the position of the wireless communication device 300.

  The communication target specifying unit 315 includes the position of the wireless communication device 300 specified by the imaging position specifying unit 314, the direction of the wireless communication device 300 acquired by the orientation detection unit 360, and the sensor acquired by the sensor position acquisition unit 313. Based on the position of the terminal 100, the sensor terminal 100 to be communicated is specified.

  Hereinafter, an example of a communication target specifying method by the communication target specifying unit 315 will be described with reference to FIGS. 10 and 11. For example, as illustrated in FIG. 10, it is assumed that the imaging position specifying unit 314 specifies the position Po of the wireless communication device 300 and the direction detection unit 360 detects the arrow Ar as the direction in which the back surface of the wireless communication device 300 faces. . At this time, the communication target specifying unit 315 determines whether or not there are a plurality of positions in the arrow Ar direction from the position Po of the wireless communication device 300 among the positions of the sensor terminals 100 acquired by the sensor position acquisition unit 313. To determine. In the example illustrated in FIG. 10, the communication target specifying unit 315 includes the position Pa of the sensor terminal 100a and the position Pc of the sensor terminal 100c in the arrow Ar direction from the position Po of the wireless communication device 300. 315 determines that there are a plurality of positions of the sensor terminal 100 in the arrow Ar direction from the position Po of the wireless communication apparatus 300.

  When the communication target specifying unit 315 determines that there are a plurality of positions of the sensor terminal 100 in the arrow Ar direction from the position Po of the wireless communication device 300, the marker 101x (see FIG. 10) of the sensor terminal 100x displayed on the display unit 350. By performing projective transformation on the image 2 (see (a)), the distance L to the sensor terminal 100x and the inclination angle θ at which the back direction of the wireless communication device 300 is inclined with respect to the arrangement surface of the marker 101x are calculated. . Then, as shown in FIG. 11, a linear distance Lcos θ between the wireless communication device 300 and the sensor terminal 100x is calculated from the distance L and the inclination angle θ. Of the sensor terminal 100a and the sensor terminal 100c existing in the arrow Ar direction from the position Po of the wireless communication device 300, the second distances Dsa and Dsc acquired by the second distance acquisition unit 312 are the calculated linear distance Lcos θ and The sensor terminal 100a that matches or falls within a predetermined error range is identified as the sensor terminal 100x displayed on the display unit 350, that is, the communication target sensor terminal 100x.

  Note that when there is no plurality of sensor terminals 100 in the direction of the arrow Ar from the position Po of the wireless communication apparatus 300, that is, when there is only one sensor terminal 100, the sensor terminal 100 is displayed on the display unit 350. It corresponds to the sensor terminal 100x. Therefore, the communication target specifying unit 315 specifies the sensor terminal 100 as a communication target.

  Next, the operation of the wireless communication apparatus 300 according to the present embodiment will be described with reference to the drawings. FIG. 12 is a flowchart illustrating an exemplary flow of a communication target specifying process executed by the control unit 310 of the wireless communication apparatus 300 according to the present embodiment. Note that this communication target specifying process is stored in advance as a program in the ROM of the control unit 310 described above, and an actual process is performed by the control unit 310 reading and executing the program.

  For example, the control unit 310 of the wireless communication apparatus 300 starts the communication target specifying process illustrated in FIG. 12 in response to an operation on the input unit 340 by the user. In this process, as shown in FIG. 2A, the image of the sensor terminal 100x to be communicated is included in the image acquired by the imaging unit 330 of the wireless communication apparatus 300 and displayed on the display unit 350 by the user. In this state, the sensor terminal 100x is identified from among the plurality of sensor terminals 100. Accordingly, it is assumed that this processing is executed in a state where the sensor terminal 100x to be communicated is displayed on the display unit 350. In this processing, data representing the position of the management device 200 and the channel of each sensor terminal 100 is previously input to the management device position table 321 and the channel setting table 322 by the user via the input unit 340, respectively. It is assumed that it is stored in the storage unit 320.

  First, the third distance acquisition unit 313a requests each management device 200 to perform wireless communication with the sensor terminal 100 and acquire the third distance between each management device 200 and each sensor terminal 100. A request signal is transmitted (step S101).

  The management device 200 receives the request signal transmitted from the wireless communication device 300 in step S101, performs wireless communication with each sensor terminal 100 according to the received request signal, and measures the received radio wave intensity. To do. Then, each management device 200 calculates a third distance between the management device 200 and the sensor terminal 100 that is the transmission source of the received radio wave based on the received radio wave intensity. Then, the management device 200 transmits data representing the calculated third distance to the wireless communication device 300.

  Next, the third distance acquisition unit 313a receives data representing the third distance calculated in each management device 200 from each management device 200 (step S102).

  Next, the sensor position specifying unit 313b receives the third distance received in step S102, the position of each management device 200 recorded in the management device position table 321 and the sensor terminal 100 recorded in the channel setting table 322. Based on the channel, the position of each sensor terminal 100 is specified (step S103).

  Next, the first distance acquisition unit 311 performs wireless communication with each management device 200 and acquires the first distance between each management device 200 and the wireless communication device 300 based on the received radio wave intensity. (Step S104).

  Next, the second distance acquisition unit 312 performs wireless communication with each sensor terminal 100 and acquires a second distance between each sensor terminal 100 and the wireless communication device 300 based on the received radio wave intensity. (Step S105).

  Next, the imaging position specifying unit 314 determines two candidate positions of the wireless communication apparatus 300 based on the position of each management apparatus 200 recorded in the management apparatus position table 321 and the first distance acquired in step S104. Is specified (step S106).

  Next, the imaging position specifying unit 314 arbitrarily specifies one sensor terminal 100 among the plurality of sensor terminals 100, and the position of the sensor terminal 100 specified in step S103 and acquired in step S105. Based on the second distance to the sensor terminal 100, the position of the wireless communication device 300 is specified from the two candidate positions specified in step S106 (step S107).

  Next, the communication target specifying unit 315 specifies the direction in which the back surface of the wireless communication apparatus 300 is facing by using the direction detection unit 360 (step S108).

  Then, the communication target specifying unit 315 is based on the position of the wireless communication device 300 specified in step S107, the position of each sensor terminal 100 specified in step S103, and the direction specified in step S108. It is determined whether or not there are a plurality of sensor terminals 100 in the direction specified from the position of the wireless communication device 300 (step S109).

  The communication target specifying unit 315 is specified from the position of the wireless communication device 300 when it is determined that the plurality of sensor terminals 100 do not exist in the direction specified from the position of the wireless communication device 300 (step S109; No). When there is only one sensor terminal 100 in the direction, the sensor terminal 100x displayed on the display unit 350 is specified as the one sensor terminal 100. Therefore, the sensor terminal 100 is specified as a communication target (step S110). Then, this process ends.

  When the communication target specifying unit 315 determines that there are a plurality of sensor terminals 100 in the direction specified from the position of the wireless communication device 300 (step S109; Yes), the communication target specifying unit 315 of the sensor terminal 100x displayed on the display unit 350 Based on the image of the marker 101x, the distance L between the wireless communication device 300 and the sensor terminal 100x and the inclination angle θ at which the back direction of the wireless communication device 300 is inclined with respect to the arrangement surface of the marker 101x are calculated ( Step S111).

  Then, the communication target specifying unit 315 calculates the linear distance Lcosθ from the distance L and the inclination angle θ calculated in step S111, and the second distance between the wireless communication device 300 and the sensor terminal 100 is calculated. Sensor terminals 100 that coincide with each other or are within a predetermined error range are identified as the sensor terminals 100x displayed on the display unit 350, that is, the communication target sensor terminals 100x (step S112). Then, this process ends.

  After the sensor terminal 100 to be communicated is identified from among the plurality of sensor terminals 100 by the above communication target identifying process, the wireless communication device 300 uses the SSID of the identified sensor terminal 100 to detect the sensor terminal 100 100 can perform wireless communication.

  According to the wireless communication system 1 described above, the wireless communication device 300 acquires the distance between itself and the management device 200 and the sensor terminal 100 from the radio wave intensity in wireless communication with the management device 200 and the sensor terminal 100. . And the own position is specified from the position of the management apparatus 200 and the sensor terminal 100, and the acquired distance. Then, the wireless communication device 300 identifies the sensor terminal 100 present in the direction in which the image capturing unit 330 is capturing from its own position as a communication target. Therefore, the wireless communication apparatus 300 can specify a sensor terminal to be communicated among the plurality of sensor terminals 100.

  In the above-described embodiment, for each of the plurality of sensor terminals 100, the channel used for wireless communication with the two management devices 200 is the sensor in any of the two areas defined by the two management devices 200. It is set in advance depending on whether the terminal 100 is located. The position of the sensor terminal 100 can be specified by the distance between the two management devices 200 and the sensor terminal 100 and the channel of the sensor terminal 100. Therefore, when the position of the sensor terminal 100 is specified from the distance between the management apparatus 200 and the sensor terminal 100, the position of the sensor terminal can be specified only by the two management apparatuses 200.

  As mentioned above, although embodiment of this invention was described, this invention is not limited by said embodiment.

  For example, in the above embodiment, a part of the function of the control unit 310 of the wireless communication device 300 may be realized by the sensor terminal 100 or the management device 200. For example, at least one control unit 210 of the two management devices 200 may function as the sensor position acquisition unit 313. For example, the management device 200a acquires the third distance between each sensor terminal 100 from the received radio wave intensity in wireless communication, and receives the third distance acquired by the management device 200b from the management device 200b. Then, the management apparatus 200a specifies the position of each sensor terminal 100 based on the third distance acquired by itself, the third distance acquired from the management apparatus 200b, and the preset channel of each sensor terminal 100. can do. And the wireless communication apparatus 300 can acquire the position of each sensor terminal 100 by transmitting the position of each sensor terminal 100 specified by the management apparatus 200a to the wireless communication apparatus 300.

  In the above embodiment, the two management devices 200 measure the received radio wave intensity of the radio signal transmitted by each sensor terminal 100, and based on the received radio wave strength, the management device 200 and the sensor terminal 300 Get the third distance between. However, each sensor terminal 100 may measure the received radio wave intensity of the radio signal transmitted by each management device 200 and acquire the third distance based on the received radio wave intensity. In this case, by transmitting the third distance acquired by each sensor terminal 100 to the wireless communication device 300, the wireless communication device 300 can acquire the third distance.

  In addition, the wireless communication apparatus 300 according to the present invention can be realized using a normal computer system without depending on a dedicated apparatus. For example, a recording medium (a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto-Optical disk), etc.) that can be read by a computer system on a computer connected to a network. The wireless communication apparatus 300 that performs the above-described processing may be configured by storing and distributing the program and installing the program in a computer system.

  Further, the method for providing the program to the computer is arbitrary. For example, the program may be uploaded to a bulletin board (BBS: Bulletin Board System) on a communication line and distributed to a computer via the communication line. The program may be transmitted by a modulated wave obtained by modulating a carrier wave with a signal representing the program, and a device that receives the modulated wave may demodulate the modulated wave to restore the program. Then, the computer activates this program and executes it in the same manner as other applications under the control of an OS (Operating System). Accordingly, the computer functions as the wireless communication device 300 that executes the above-described processing.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to the specific embodiment which concerns, This invention includes the invention described in the claim, and its equivalent range It is. Hereinafter, the invention described in the scope of claims of the present application will be appended.

(Appendix 1)
A wireless communication device connected to two first wireless communication devices and a plurality of second wireless communication devices so as to be capable of wireless communication,
A position storage unit for storing the position of each of the two first wireless communication devices;
A position acquisition unit that acquires the position of each of the plurality of second wireless communication devices;
A first distance acquisition unit that acquires a first distance between each of the two first wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
A second distance acquisition unit that acquires a second distance between each of the plurality of second wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
The position of each of the two first wireless communication devices, the first distance, the position of at least one second wireless communication device, and the at least one second wireless communication device and the wireless communication device A first position specifying unit for specifying the position of the wireless communication device based on the second distance between;
An orientation detection unit for detecting a direction in which a predetermined surface of the wireless communication device faces;
Based on the position of the wireless communication device, the direction detected by the azimuth detecting unit, and the position of each of the plurality of second wireless communication devices, the wireless communication device can select the wireless communication device from the plurality of second wireless communication devices. A communication target specifying unit for specifying a target for wireless communication with the communication device;
A wireless communication device comprising:

(Appendix 2)
The first position specifying unit includes:
Based on the position of each of the two first wireless communication devices and the first distance, two candidate positions of the wireless communication device are identified,
Of the two candidate positions specified, the position of the at least one second wireless communication apparatus is separated from the position of the at least one second wireless communication apparatus by the second distance. A position corresponding to the position is specified as the position of the wireless communication device,
The wireless communication apparatus according to Supplementary Note 1, wherein:

(Appendix 3)
The communication target specifying unit includes the second wireless communication device existing in a position detected by the azimuth detecting unit from the position of the wireless communication device among the positions of the plurality of second wireless communication devices. , Specifying as a target for wireless communication with the wireless communication device,
The wireless communication apparatus according to appendix 1 or 2, characterized by the above.

(Appendix 4)
An imaging unit that acquires an image of a marker provided on a surface of the second wireless communication device located in a direction in which the predetermined surface faces;
The communication target specifying unit is:
Determining whether or not there are a plurality of positions in the direction detected by the azimuth detecting unit from the positions of the wireless communication apparatuses among the positions of the plurality of second wireless communication apparatuses;
If it is determined that the number is not plural, the second wireless communication device existing at a position in the direction detected by the azimuth detecting unit is specified as a target for wireless communication with the wireless communication device from the position of the wireless communication device. And
If it is determined that there is a plurality, the distance between the wireless communication device and the second wireless communication device provided with the marker is acquired based on the marker image acquired by the imaging unit;
A second distance between the wireless communication device and the wireless communication device among the second wireless communication devices respectively present at a plurality of positions in the direction detected by the azimuth detecting unit from the position of the wireless communication device is the wireless Identifying the second wireless communication device corresponding to the distance between the communication device and the second wireless communication device provided with the marker as a target for wireless communication with the wireless communication device;
The wireless communication device according to attachment 3, wherein

(Appendix 5)
For each of the plurality of second wireless communication devices, an area storage unit that stores an area where the second wireless communication apparatus exists, out of two areas obtained by using a straight line connecting the two first wireless communication apparatuses as a boundary Further comprising
The position acquisition unit
A third distance acquisition unit that acquires a third distance between each of the two first wireless communication devices and each of the plurality of second wireless communication devices from radio wave intensity in wireless communication;
For each of the plurality of second wireless communication devices, based on the position of the two first wireless communication devices, the area where the second wireless communication device exists, and the third distance, the second wireless communication device A second position specifying unit for specifying the position of the communication device,
The wireless communication device according to any one of appendices 1 to 4, characterized in that:

(Appendix 6)
The second position specifying unit includes:
For each of the plurality of second wireless communication devices, identify two candidate positions of the second wireless communication device based on the position of each of the two first wireless communication devices and the third distance,
Among the two candidate positions specified, a position within the area where the second wireless communication device exists is specified as the position of the second wireless communication device.
The wireless communication apparatus according to appendix 5, wherein:

(Appendix 7)
A communication target specifying method executed by a wireless communication system in which two first wireless communication devices, a plurality of second wireless communication devices, and wireless communication devices are connected so as to be capable of wireless communication with each other,
A position acquisition step of acquiring the position of each of the plurality of second wireless communication devices;
A first distance acquisition step of acquiring a first distance between each of the two first wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
A second distance acquisition step of acquiring a second distance between each of the plurality of second wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
The position of each of the two first wireless communication devices recorded in the position storage unit, the first distance, the position of at least one second wireless communication device, and the at least one second wireless communication device And a second step of specifying the position of the wireless communication device based on the second distance between the wireless communication device and the wireless communication device;
A direction detecting step for detecting a direction in which the predetermined surface of the wireless communication device faces;
Based on the position of the wireless communication device, the direction detected in the azimuth detection step, and the position of each of the plurality of second wireless communication devices, the wireless communication device can select the wireless communication device from the plurality of second wireless communication devices. A communication target specifying step for specifying a target for wireless communication with the communication device;
A communication object specifying method comprising:

(Appendix 8)
A position acquisition means for acquiring a position of each of the plurality of second wireless communication devices from a computer connected to the two first wireless communication devices and the plurality of second wireless communication devices so as to enable wireless communication;
First distance acquisition means for acquiring a first distance between each of the two first wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
Second distance acquisition means for acquiring a second distance between each of the plurality of second wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
The position of each of the two first wireless communication devices recorded in the position storage unit, the first distance, the position of at least one second wireless communication device, and the at least one second wireless communication device First position specifying means for specifying the position of the wireless communication device based on the second distance between the wireless communication device and the wireless communication device;
Direction detecting means for detecting a direction in which a predetermined surface of the wireless communication device faces;
Based on the position of the wireless communication device, the direction detected by the azimuth detecting means, and the position of each of the plurality of second wireless communication devices, the wireless communication device can select the wireless communication device from the plurality of second wireless communication devices. A communication target specifying means for specifying a target for wireless communication with the communication device;
A program characterized by functioning as

DESCRIPTION OF SYMBOLS 1 ... Wireless communication system, 100 (100a-100d, 100x) ... Sensor terminal, 101a-101d, 101x ... Marker, 110 ... Control part, 120 ... Sensor part, 130 ... Wireless communication part, 200 (200a, 200b) ... Management Device 210... Control unit 220 220 Wireless communication unit 300 Wireless communication device 310 Control unit 311 First distance acquisition unit 312 Second distance acquisition unit 313 Sensor position acquisition unit 313a First 3 distance acquisition unit, 313b ... sensor position specifying unit, 314 ... imaging position specifying unit, 315 ... communication target specifying unit, 320 ... storage unit, 321 ... management device position table, 322 ... channel setting table, 330 ... imaging unit, 340 ... Input unit, 350 ... Display unit, 360 ... Direction detection unit, 370 ... Wireless communication unit

Claims (8)

A wireless communication device connected to two first wireless communication devices and a plurality of second wireless communication devices so as to be capable of wireless communication,
A position storage unit for storing the position of each of the two first wireless communication devices;
A position acquisition unit that acquires the position of each of the plurality of second wireless communication devices;
A first distance acquisition unit that acquires a first distance between each of the two first wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
A second distance acquisition unit that acquires a second distance between each of the plurality of second wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
The position of each of the two first wireless communication devices, the first distance, the position of at least one second wireless communication device, and the at least one second wireless communication device and the wireless communication device A first position specifying unit for specifying the position of the wireless communication device based on the second distance between;
An orientation detection unit for detecting a direction in which a predetermined surface of the wireless communication device faces;
Based on the position of the wireless communication device, the direction detected by the azimuth detecting unit, and the position of each of the plurality of second wireless communication devices, the wireless communication device can select the wireless communication device from the plurality of second wireless communication devices. A communication target specifying unit for specifying a target for wireless communication with the communication device;
A wireless communication device comprising: The first position specifying unit includes:
Based on the position of each of the two first wireless communication devices and the first distance, two candidate positions of the wireless communication device are identified,
Of the two candidate positions specified, the position of the at least one second wireless communication apparatus is separated from the position of the at least one second wireless communication apparatus by the second distance. A position corresponding to the position is specified as the position of the wireless communication device,
The wireless communication apparatus according to claim 1. The communication target specifying unit includes the second wireless communication device existing in a position detected by the azimuth detecting unit from the position of the wireless communication device among the positions of the plurality of second wireless communication devices. , Specifying as a target for wireless communication with the wireless communication device,
The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus is a wireless communication apparatus. An imaging unit that acquires an image of a marker provided on a surface of the second wireless communication device located in a direction in which the predetermined surface faces;
The communication target specifying unit is:
Determining whether or not there are a plurality of positions in the direction detected by the azimuth detecting unit from the positions of the wireless communication apparatuses among the positions of the plurality of second wireless communication apparatuses;
If it is determined that the number is not plural, the second wireless communication device existing at a position in the direction detected by the azimuth detecting unit is specified as a target for wireless communication with the wireless communication device from the position of the wireless communication device. And
If it is determined that there is a plurality, the distance between the wireless communication device and the second wireless communication device provided with the marker is acquired based on the marker image acquired by the imaging unit;
A second distance between the wireless communication device and the wireless communication device among the second wireless communication devices respectively present at a plurality of positions in the direction detected by the azimuth detecting unit from the position of the wireless communication device is the wireless Identifying the second wireless communication device corresponding to the distance between the communication device and the second wireless communication device provided with the marker as a target for wireless communication with the wireless communication device;
The wireless communication apparatus according to claim 3. For each of the plurality of second wireless communication devices, an area storage unit that stores an area where the second wireless communication apparatus exists, out of two areas obtained by using a straight line connecting the two first wireless communication apparatuses as a boundary Further comprising
The position acquisition unit
A third distance acquisition unit that acquires a third distance between each of the two first wireless communication devices and each of the plurality of second wireless communication devices from radio wave intensity in wireless communication;
For each of the plurality of second wireless communication devices, based on the position of the two first wireless communication devices, the area where the second wireless communication device exists, and the third distance, the second wireless communication device A second position specifying unit for specifying the position of the communication device,
The wireless communication device according to claim 1, wherein the wireless communication device is a wireless communication device. The second position specifying unit includes:
For each of the plurality of second wireless communication devices, identify two candidate positions of the second wireless communication device based on the position of each of the two first wireless communication devices and the third distance,
Among the two candidate positions specified, a position within the area where the second wireless communication device exists is specified as the position of the second wireless communication device.
The wireless communication apparatus according to claim 5. A communication target specifying method executed by a wireless communication system in which two first wireless communication devices, a plurality of second wireless communication devices, and wireless communication devices are connected so as to be capable of wireless communication with each other,
A position acquisition step of acquiring the position of each of the plurality of second wireless communication devices;
A first distance acquisition step of acquiring a first distance between each of the two first wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
A second distance acquisition step of acquiring a second distance between each of the plurality of second wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
The position of each of the two first wireless communication devices recorded in the position storage unit, the first distance, the position of at least one second wireless communication device, and the at least one second wireless communication device And a second step of specifying the position of the wireless communication device based on the second distance between the wireless communication device and the wireless communication device;
A direction detecting step for detecting a direction in which the predetermined surface of the wireless communication device faces;
Based on the position of the wireless communication device, the direction detected in the azimuth detection step, and the position of each of the plurality of second wireless communication devices, the wireless communication device can select the wireless communication device from the plurality of second wireless communication devices. A communication target specifying step for specifying a target for wireless communication with the communication device;
A communication object specifying method comprising: A position acquisition means for acquiring a position of each of the plurality of second wireless communication devices from a computer connected to the two first wireless communication devices and the plurality of second wireless communication devices so as to enable wireless communication;
First distance acquisition means for acquiring a first distance between each of the two first wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
Second distance acquisition means for acquiring a second distance between each of the plurality of second wireless communication devices and the wireless communication device from radio wave intensity in wireless communication;
The position of each of the two first wireless communication devices recorded in the position storage unit, the first distance, the position of at least one second wireless communication device, and the at least one second wireless communication device First position specifying means for specifying the position of the wireless communication device based on the second distance between the wireless communication device and the wireless communication device;
Direction detecting means for detecting a direction in which a predetermined surface of the wireless communication device faces;
Based on the position of the wireless communication device, the direction detected by the azimuth detecting means, and the position of each of the plurality of second wireless communication devices, the wireless communication device can select the wireless communication device from the plurality of second wireless communication devices. A communication target specifying means for specifying a target for wireless communication with the communication device;
A program characterized by functioning as

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