JP5537396B2 - Sensing device and system - Google Patents

Description

  The present invention relates to the field of sensing devices that acquire data via radio.

  Communication is important in every organization. The quality of communication affects various factors such as business efficiency, productivity, rewardingness, and relationships. Therefore, measuring the quality and quantity of communication is an important key to solving organizational problems. As a means for measuring communication, there is a known technique that utilizes face-to-face information acquired using a sensing device.

  A technique using infrared communication is disclosed for acquiring person-to-person information. For example, when communication using radio waves of several MHz band is used, there is a problem that the communication range is expanded beyond the intended range due to wraparound. In such a case, it is difficult to determine whether standing back to back or facing each other, and it is difficult to handle it as face-to-face information for detecting communication. Infrared communication is characterized by strong directivity, and is a communication means suitable for acquiring face-to-face information.

  On the other hand, information on where the communication took place is also important. The quality of communication differs depending on whether it is communication in a conference room or one-on-one in an office. It can also be determined from the position information whether there is a lot of desk work or whether the meeting is too long.

  Similarly, a technique using infrared communication has been disclosed for acquiring human position information. For example, since communication using radio waves of several MHz band has a property of transmitting a substance, it is difficult to determine whether it is in a room or in the vicinity, and it is difficult to accurately handle it as position information. On the other hand, since infrared communication hardly transmits a substance, it is suitable for transmitting position information.

  Therefore, in an application for acquiring face-to-face information and position information, communication using electromagnetic waves having a frequency higher than radio waves, such as infrared rays and visible rays, is generally used.

JP2008-210363 JP2008-301071 JP2005-309908

  In the conventional technology, there is a study on the acquisition of face-to-face information and the acquisition of position information using light rays, but sufficient consideration has been given to the case where two types of information are acquired simultaneously using the same type of light rays. However, there is a problem that information acquisition methods interfere with each other and information cannot be acquired appropriately.

  In communication using radio waves, there are known a method of transmitting by changing the frequency for each information, and a method of transmitting and receiving information while performing phase modulation.

  However, for example, in communication using infrared rays, it is possible to change the wavelength of infrared rays on the transmitter side by means for obtaining first information facing information and means for obtaining second information position information. In order to provide a means for discriminating wavelengths on the receiver side, an expensive member may be required, and it is difficult to perform using only a member related to inexpensive infrared communication.

  Furthermore, in communication using light rays, it is difficult to perform modulation by phase and frequency, which makes it difficult to perform a plurality of communications with one device.

  The present application includes a plurality of means for solving the above-described problems. To give an example, a sensing device that acquires a plurality of information via a plurality of optical communications performed at a constant communication interval is provided. A receiving unit that receives optical communication and a second optical communication performed at a communication interval longer than a communication interval of the first optical communication, and converts the first and second optical communication received by the receiving unit into data And a memory for storing the converted data, wherein a communication time per one time of the first optical communication is shorter than a communication time per one time of the second optical communication. Sensing device.

  In a sensor that acquires two or more pieces of information via light communication using a single device, it is possible to reduce the possibility that information cannot be transmitted due to interference.

1 is a block diagram of an entire system according to an embodiment of the present invention. The block diagram of the area detection infrared rays beacon which is one Example of this invention The block diagram of the name tag type sensing device which is one Example of this invention The circuit diagram of the area detection infrared rays beacon which is one Example of the present invention Infrared communication timing chart according to an embodiment of the present invention The figure explaining the encoding system of the infrared communication signal for short distances which is one Example of this invention The figure explaining the encoding system of the infrared communication signal for long distances which is one Example of this invention The flowchart which decodes the infrared communication signal for long distances which is one Example of this invention FIG. 1 is a sequence diagram of infrared communication according to an embodiment of the present invention. Block diagram of an area detection infrared beacon that is another embodiment of the present invention Infrared communication timing chart according to another embodiment of the present invention Infrared LED arrangement diagram of area detection infrared beacon according to one embodiment of the present invention The figure explaining the application method of the area detection infrared rays beacon which is one Example of this invention Example of ID transmitted by area detection infrared beacon according to one embodiment of the present invention Example of analysis display using area detection infrared beacon according to one embodiment of the present invention Block diagram of a name tag type sensing device according to another embodiment of the present invention Block diagram of a name tag type sensing device having a time adjustment function in another embodiment of the present invention The block diagram about another form of the area detection infrared rays beacon which is another Example of this invention The block diagram of the whole system which is another Example of this invention

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, an example in which infrared rays are used as light rays is shown, but other light rays such as visible rays may be used.

  FIG. 1 shows an embodiment of a system configuration for acquiring meeting information and position information according to the present invention.

  Here, 101 is an area detection infrared beacon that transmits a signal for detecting the user's position, 102 and 103 are name tag type sensing devices carried by the user, 104 is a name tag type sensing device 102 and 103 inserted, and data is inserted. Cradle for collecting, 105 is a base station PC for temporarily holding data collected from the cradle 104, 106 is a signal server for storing the collected data, 107 is a content server for analyzing and storing the collected data, 108 is a content display PC that performs processing for displaying the analyzed result, and 109 is a display that displays the analyzed result.

The name tag type sensing devices 102 and 103 are obtained by exchanging face-to-face information by carrying the infrared tag communication, for example, by the user hanging down from the neck. The acquired face-to-face information is stored in the name tag type sensing devices 102 and 103 until they are inserted into the cradle 104, respectively.
Infrared communication performed between name tag type sensing devices obtains face-to-face information, so short-range infrared communication with a distance of about 2 m is suitable.

  On the other hand, the area detection infrared beacon 101 transmits an infrared communication signal for position detection to the name tag type sensing devices 102 and 103. The name tag type sensing devices 102 and 103 receive the unique ID transmitted from the area detection infrared beacon 101 to acquire the position information. The area detection infrared beacon 101 may periodically transmit an infrared signal for position detection regardless of the presence or absence of the name tag type sensing device. The acquired position information is stored in the name tag type sensing devices 102 and 103 until the business card type sensing devices 102 and 103 are inserted into the cradle 104, respectively.

  Infrared communication for position detection acquires position information in units of rooms, so long-distance infrared communication with a communication distance of about 10 m or more is suitable.

  Here, the long-distance infrared communication uses a coding method in which communication is performed at a longer cycle interval than the short-distance infrared communication and one transmission time is long. The encoding method will be described later.

  When the name tag type sensing devices 102 and 103 are inserted into the cradle 104, the base station PC 105 collects data and stores the data in the base station DB, which is a temporary storage location. The data in the base station DB is sent to the signal server 106 by the base station middle. All data is stored in the signal DB of the signal server 106.

  The content server 107 generates a feature quantity from the signal DB and stores the result in the analysis DB. The content display PC 108 processes the results analyzed by the content server 107 so that they can be displayed in various forms, and sends them to the display 109.

  As described above, it is possible to provide a system capable of acquiring face-to-face information and position information, analyzing where and what kind of communication is performed, and feeding back to the user.

  FIG. 2 shows an embodiment of the configuration of the area detection infrared beacon 101 according to the present invention.

  Here, 201 is a microcomputer that controls the area detection infrared beacon 101, 202 is an ID setting switch for setting an ID transmitted by the area detection infrared beacon 101, and 203 generates a power supply voltage of the area detection infrared beacon 101 from an AC adapter. A power regulator, 204 is a resistor, and 205 is an infrared light emitting diode.

  In the area detection infrared beacon 101, the ID set by the ID setting switch 202 is encoded by the microcomputer 201 as long-distance infrared communication, and infrared rays are transmitted by the infrared light emitting diode 205. Here, the ID can be written in the program of the microcomputer, but by providing the ID setting switch 202 as in this embodiment, there is an effect that it is not necessary to individually manage the program. Further, as shown in the figure, the power supply is supplied by an AC adapter so that the battery need not be provided. Accordingly, there is an effect that battery maintenance management is not required when the area detection infrared beacon 101 is installed in each room.

  FIG. 3 shows an example of the configuration of the name tag type sensing device 102 according to the present invention.

  Here, 301 is a microcomputer that controls the name tag type sensing device 102, 302 is an infrared transmission / reception driver for short distance, 303 is an infrared transmission / reception module for short distance, 304 is an infrared reception module for long distance, and 305 is a temporary storage of data Non-volatile memory to be stored, 306 is an acceleration sensor that detects the user's movement, 307 is an illuminance sensor that measures the brightness around the user, 308 is a temperature sensor that measures the temperature around the user, and 309 is a user's speech A microphone 310 is a speaker for notifying the user, 311 is an LCD for providing information to the user, 312 is an operation switch operated by the user, and 313 is a power supply regulator for supplying power to the name tag type sensing device 102.

  As described above, face-to-face information between users is acquired through short-range infrared communication, and user position information is acquired through long-range infrared communication.

  Short-range infrared communication uses an encoding method with a short communication time. Therefore, the short-range infrared transmission / reception module 303 that performs infrared transmission / reception encodes and decodes the infrared waveform by the short-range infrared transmission / reception driver 302, and performs transmission / reception through the serial communication module installed in the microcomputer 301.

  On the other hand, long-distance infrared communication uses an encoding method with a long communication time. Therefore, it is possible to directly receive from the long-distance infrared receiving module 304 that receives infrared rays through the general-purpose port of the microcomputer 301 and to perform decoding in the microcomputer 301.

  Since the short-range infrared communication is performed in a short cycle, it is possible to reduce the load on the microcomputer 301 by performing transmission / reception through serial communication. In addition, since long-distance infrared communication is performed in a long cycle, there is an effect that even if decoding is performed by the microcomputer 301, no significant load is applied. That is, it is possible to reduce the power consumption of the microcomputer.

  Since the name tag type sensing device 102 is carried by the user, a battery, particularly a rechargeable secondary battery is suitable as a power source.

  The acquired information is stored in the nonvolatile memory 305 until it is inserted into the cradle. Although not limited to a non-volatile memory here, a non-volatile memory is suitable so that information is not lost even if the power supply is lost.

  By detecting the user's movement by the acceleration sensor 306 and acquiring the user's utterance amount by the microphone 309, it is possible to accumulate and analyze information related to communication together with the position information. For example, it is possible to analyze where the utterance is a one-way conversation, where the utterance is mutually speaking, where the utterance is moving, and the like.

  In addition, the ambient light information of the user can be acquired together with the position information by the illuminance sensor 307 and the temperature sensor 308. For example, it is possible to save energy of facilities by accumulating information on which lighting is dark or bright and where the temperature is low or high, and managing appropriate lighting and air conditioning.

  The LCD 311, the speaker 310, and the operation switch 312 can provide a function of feeding back the acquired information to the user.

  FIG. 4 is an embodiment of a circuit diagram of the area detection infrared beacon 101 according to the present invention.

  Here, rotary switches SW0 to SW3 are used as a method for realizing the ID setting switch 202. Further, the transmission power can be switched by the slide SW2. As a result, it is possible to limit the communication distance in an open space. For example, the communication distance is 10 m when the power is high, and the communication distance is 5 m when the power is low. By restricting the detection range, it is possible to obtain position information in a narrow range, and it is possible to install it so that it is difficult to receive another area detection infrared beacon signal indicating an adjacent space. The slide SW3 functions as a switch that allows the firmware of the microcomputer to be written by the connector CN2. Thereby, the firmware of the microcomputer can be improved after assembly.

  FIG. 5 is an example of a timing chart of infrared communication according to the present invention.

  Here, the communication cycle Ta of the short-range infrared communication for acquiring the face-to-face information is about 1 second, and the long-range infrared communication cycle Tb for acquiring the position information is about 10 seconds. It is suitable to detect the face-to-face information about once per second from the moving speed of the person, but the position information may be detected about once every 10 seconds from the moving speed of the room unit.

  Infrared communication is a suitable communication means for acquiring face-to-face information and position information, such as strong directivity, no wraparound, and no transmission through walls, but when using elements that transmit and receive infrared light of the same frequency, multiple There is a problem of causing interference if both communications are performed simultaneously. In the case shown in the figure, the short-range infrared communication and the long-range infrared communication cause interference at time t1 and time t2.

  However, the communication cycle of short-range infrared communication is about 1/10 of the communication cycle of long-range infrared communication, and the probability that communication is impossible due to interference is also about 1/10. With this level of interference, the problem is minor in analyzing the face-to-face information.

  On the other hand, since long-distance infrared communication uses an encoding method with a long communication time, even if a part of communication fails to transmit significant data due to interference, by using an error correction code method, There is a low probability that communication will fail due to short-range infrared communication.

  As described above, the communication cycle of the long-distance infrared communication is made longer than the communication cycle of the short-distance infrared communication, and one communication time of the long-distance infrared communication is one communication time of the short-distance infrared communication. By using a longer encoding method, it is possible to efficiently obtain the face-to-face information and the position information.

  FIG. 6 shows an embodiment of a short-range infrared communication signal encoding method according to the present invention. The data to be transmitted is 2 bytes, and as a means for confirming whether the transmission data has been received correctly, a total of 4 bytes of 2 bytes of CRC16 are transmitted.

  The transmission data is encoded for each byte. The data is a total of 10 bits including a start bit of logical value 0 indicating the head of the byte, 8 bits of transmission data, and a stop bit of logical value 1 indicating the end of the byte. Encoding in this way facilitates transmission / reception by serial communication.

  Here, the transmission time of 1 bit is 16 μs, and the transmission time of 4 bytes as a whole is 0.14 ms and 0.64 ms. For example, if communication is performed once per second, this time is sufficiently short, and is suitable as the transmission time.

  The infrared communication in this embodiment emits light when the logical value is 0, and does not emit light when the logical value is 1. In order to reduce power consumption during infrared light emission, the light emission pulse may be shorter than 16 μs, which is a transmission time for one bit. For example, it may be about 3 μs.

  FIG. 7 shows an embodiment of a long-range infrared communication signal encoding method according to the present invention. Data to be transmitted is 16 bits for 2 bytes, and 16 bits for 2 bytes obtained by inverting the logical value of the data information are transmitted as means for confirming whether the transmission data has been correctly received.

  Before transmitting the entire data, a logical value 1 is transmitted for 1 ms and a logical value 0 is transmitted for 1 ms as a leader code. Decoding of long-distance infrared communication is performed by, for example, the microcomputer 301 provided in the name tag type sensing device shown in FIG. 3, and thus a reader code is provided to reduce the load on the microcomputer.

  Transmission data is encoded bit by bit. When the data information is 0, a logical value 1 is transmitted for 500 μs and a logical value 0 is transmitted for 500 μs. If the data information is 1, a logical value 1 is transmitted for 500 μs and a logical value 0 is transmitted for 1500 μs.

  Finally, a logical value 1 is transmitted for 500 μs as a stop bit indicating the end of the data.

  Although the transmission time differs depending on whether the data information is 0 or 1, the total transmission time becomes a fixed 50 ms by adding information obtained by inverting the logical value of the data information. For example, if communication is performed once every 10 seconds, this time is sufficiently short, and is suitable as the transmission time.

  Infrared light is emitted when the logical value is 1, and is not emitted when the logical value is 0. In order to reduce the power consumption during infrared light emission, the light emission of logical value 1 may be modulated into short pulses. For example, it may be modulated to a pulse with a 38 kHz duty of 50%.

  When the data information is 0, the transmission time of 1 bit is 1 ms, and when the data information is 1, the transmission time of 1 bit is 2 ms. Since the transmission time for one short distance infrared communication shown in FIG. 6 is 0.64 ms, even if it overlaps with the long distance infrared communication shown in FIG. 5, the data information of the long distance infrared communication is 0. The probability of misjudging whether there is 1 or 1 is low.

  One of the objects of the invention described in the present application is to avoid losing long-distance communication that is infrequent due to communication collision (interference), so at least one communication time for long-distance infrared communication is reduced. The probability of a collision can be further reduced by making it shorter than the communication interval of short-range infrared communication. That is, the amount of time increases in the order of "communication time for short-range infrared communication", "communication time for long-range infrared communication", "communication interval for short-range infrared communication", and "communication interval for long-range infrared communication". It is one of the features of the present invention to set the communication time and interval.

  FIG. 8 is an example of a flowchart for decoding a long-distance infrared communication signal according to the present invention. The program based on this flowchart is executed by the microcomputer 301 provided in the name tag type sensing device shown in FIG. 3, for example.

Initialization is performed by processing 1102, and a reader code is detected by processing 1103. For example, in the case of the encoding method shown in FIG. 7, the reader code only has to detect whether the logical value 1 appears for 1 ms and the logical value 0 appears for 1 ms, and the processing is not heavy.
When the reader code is detected, the process 1104 reads the data code 16 bits, and the process 1105 executes the inverted data code 16 bits. For example, in the case of the encoding method shown in FIG. 7, if logical value 1 is 500 μs and logical value 0 is 500 μs, data information is 0, and logical value 1 is 500 μs and logical value 0 is 1500 μs, data is detected. Information processing 1 and reading.

  When the data code and the inverted data code are read, it is determined in processing 1106 whether the read data is correct. Here, the inverted data code is used for error detection purposes because it may be erroneously recognized due to external noise such as a fluorescent lamp or a PC display in infrared communication. This process may be performed by inverting the logical value of the inverted data code and checking if it is equal to the data code. If it is determined that the data code is correct, the process proceeds to processing 1107 to record data code information. This is stored in, for example, the nonvolatile memory 305 provided in the name tag type sensing device shown in FIG. If it is determined that the data code is not correct, the read data is discarded and the processing returns to step 1103. If the long-distance infrared communication signal is a signal for transmitting position information as in the example described above and is transmitted from the area detection infrared beacon once every 10 seconds, it is assumed that the long-distance infrared communication signal is for long distance due to external noise. Even if reception of infrared communication fails, a similar signal can be received after 10 seconds in the reader code detection sequence 1103 in the name tag type sensing device.

  FIG. 9 is an example of a sequence diagram of infrared communication of face-to-face information and position information according to the present invention.

  Processes 901 to 904 are short-range infrared communication sequences for exchanging face-to-face information. In short-distance infrared communication, in order to acquire face-to-face information between users, the name tag type sensing device performs bidirectional transmission and reception. On the other hand, processing 905 to processing 907 is a long-range infrared communication sequence for acquiring position information. In the long-distance infrared communication, each name tag type sensing device receives the signal transmitted by the area detection infrared beacon in order to acquire the position information of the user.

  FIG. 12 is an example of an infrared LED arrangement of an area detection infrared beacon according to the present invention.

  In order to detect one room with one area detection infrared beacon, a communication distance of 10 m or more and a transmission angle of 90 ° or more are required. In order to secure a communication distance of 10 m or more, a transmission range of one LED is suitably about 30 °. In order to achieve a transmission angle of 90 ° or more using this, it is preferable to arrange about four at 30 ° intervals as in this embodiment.

  FIG. 13 shows an application example of the area detection infrared beacon according to the present invention.

  Here, 1301 is a room to be detected, 1302 is an area detection infrared beacon, 1302 is a table, 1304-1307 is a user, and 1308-1311 is a name tag type sensing device carried by the user 1304-1307.

  If the area detection infrared beacon 1302 is placed in the corner of the room, not only the name tag type sensing devices 1310 and 1311 carried by the users 1310 and 1311 facing the area detection infrared beacon 1302 side, Since the light is reflected from the wall, the name tag type sensing devices 1308 and 1309 carried by the users 1308 and 1309 can also receive the infrared transmission signal from the area detection infrared beacon 1302.

  Thus, one area can be detected by one area detection infrared beacon.

FIG. 14 shows an example of data transmitted by the area detection infrared beacon according to the present invention.
Here, the ID is displayed in hexadecimal.

  The data transmitted by the area detection infrared beacon may be transmitted with a different ID for each location. The name tag type sensing device that has received the data transmitted by the area detection infrared beacon detects where the user is carrying from the ID. For example, when the name tag type sensing device receives 2001 in hexadecimal notation, it can be detected that it is in the reception room A.

  FIG. 15 shows an example of a display on which position information is analyzed by the system according to the present invention.

Here, with respect to one user, where from every hour to what time was displayed for five days. From such information, it is possible to give feedback on how to spend time in the day, especially whether there are too many meetings or meetings, and it is possible to aim for a more efficient way of business. In addition, as regards applications, since user location information can be obtained, it is possible to provide a system that can analyze the quality of communication together with location information by providing an acceleration sensor and microphone in the name tag type sensing device. It is.
Further, by providing the name tag type sensing device with the illuminance sensor and the temperature sensor, it is possible to provide a system that can analyze the environment information around the user together with the position information.

  FIG. 10 shows another embodiment of the configuration of the area detection infrared beacon according to the present invention.

  Here, 1001 is a microcomputer for controlling the area detection infrared beacon, 1002 is a USB module for connecting to the personal computer 1010 by USB, 1003 is an ID setting switch for setting an ID transmitted by the area detection infrared beacon, and 1004 is an area detection. A power supply regulator for generating the power supply voltage of the infrared beacon, 1005 is a resistor, and 1006 is an infrared light emitting diode.

  This embodiment is characterized in that an area detection infrared beacon is connected to a personal computer 1010 for use. As a result, the timing at which the area detection infrared beacon is transmitted can be controlled from the personal computer 1010.

  The area detection infrared beacon performs encoding for long-distance infrared communication by the microcomputer 1001 using the ID set by the ID setting switch 1003 as position information, and transmits infrared by the infrared light emitting diode 1006. Here, the ID may be controlled by the personal computer 1010 instead of the ID setting switch 1003. As shown in FIG. 18, the area detection infrared beacon may have a real-time clock RTC 1807 and a recording unit 1808 in which transmission timing is recorded, and the timing may be determined based on information set in the recording unit 1808. The power of the area detection infrared beacon does not need to include a battery by being supplied from the personal computer 1010 via USB. This has the effect that battery maintenance management is not required when the area detection infrared beacon is installed in each room.

  FIG. 11 is an example of a timing chart of infrared communication when the area detection infrared beacon shown in FIG. 10 is used.

  The short-range infrared communication for face-to-face information and the distance infrared communication for position information may cause interference when using infrared rays of the same frequency. In this embodiment, the area detection infrared ray shown in FIG. As in the embodiment of the beacon, the transmission time of the short distance infrared communication and the long distance infrared communication can be shifted by controlling the timing of the infrared communication, thereby further reducing the interference.

  As shown in FIG. 17, the transmission time of the short-range infrared communication may be adjusted with the real-time clock RTC 1714 when the name tag type sensing device is inserted into the cradle. In this case, it is possible to control the transmission time with high accuracy. At this time, the name tag type sensing device may have a storage unit 1715 that records the transmission timing of the short-range infrared communication, and may determine the timing based on information set in the storage unit 1715. That is, it is possible to prevent interference by transmitting the transmission time of the short-range infrared communication and the transmission time of the long-distance infrared communication, and then transmitting the transmission time at a predetermined time.

  The transmission timing set in the name tag type sensing device and the area detection infrared beacon may be synchronized through a network. For example, as shown in FIG. 19, a personal computer 1900 connected to an area detection infrared beacon and a name tag type sensing device cradle 1904 are connected via a network, and a time synchronization server 1906 determines and sets each transmission timing. It may be in shape.

  In this embodiment, the transmission times t1 and t2 of the short distance infrared communication and the transmission times t1 'and t2' of the long distance infrared communication are shifted. In this way, by transmitting the transmission time of the short-range infrared communication and the transmission time of the long-range infrared communication at a predetermined time, it is possible to acquire the face-to-face information and the position information without further interference. It is.

  FIG. 16 is another embodiment of the configuration of the name tag type sensing device 102 according to the present invention.

  Here, 1601 is a microcomputer that controls the name tag type sensing device 102, 1603 is an infrared transmission / reception module that performs infrared transmission and reception for short distances and infrared transmission for long distances, 1605 is a non-volatile memory that temporarily stores data, 1606 Is an acceleration sensor that detects the user's movement, 1607 is an illuminance sensor that measures the brightness around the user, 1608 is a temperature sensor that measures the temperature around the user, 1609 is a microphone that detects the user's speech, and 1610 notifies the user 1611 is an LCD for providing information to the user, 1612 is an operation switch operated by the user, and 1613 is a power supply regulator for supplying power to the name tag type sensing device 102.

  As described above, the short-range infrared communication and the long-range infrared communication have different encoding methods, but transmission / reception is performed by one type of infrared transmission / reception module 1603, and all encoding and decoding are executed by the microcomputer 1601. It is also possible. The short-wave infrared communication and the long-distance infrared communication can be easily distinguished by the microcomputer 1601 because the received waveforms are different. In the present embodiment, the number of types of infrared transmission / reception modules can be reduced, and the name tag type sensing device 102 can be further reduced in size.

  101 ... Area detection infrared beacon, 102, 103 ... Name tag type sensing device, 104 ... Cradle which is charger and data transfer machine.

Claims (12)

A sensing device that acquires a plurality of information via a plurality of optical communications performed at a constant communication interval,
A receiver that receives the first optical communication and the second optical communication performed at a communication interval longer than the communication interval of the first optical communication;
A processor that converts the first and second optical communications received by the receiver into data;
A memory for storing the converted data;
With
The sensing device, wherein a communication time per one time of the first optical communication is shorter than a communication time per time of the second optical communication. The sensing device according to claim 1,
The optical communication is a communication using infrared light. The sensing device according to claim 1,
The sensing device, wherein a communication interval of the first optical communication is longer than a communication time per one time of the second optical communication. The sensing device according to claim 1,
The receiving unit is a sensing device realized by a first optical communication module that receives the first optical communication and a second optical communication module that receives the second optical communication. The sensing device according to claim 4,
The processor is a sensing device realized by a first processor that processes the first optical communication and a second processor that processes the second optical communication. The sensing device according to claim 5,
The second processor is a general-purpose processor capable of realizing other functions of the sensing device,
The sensing device, wherein the first processor records data in the memory via the second processor. The sensing device according to claim 1,
The first optical communication is communication for acquiring proximity information with another sensing device;
The second optical communication is communication for acquiring position information of the sensing device,
further,
An ID storage memory for storing an identifier of the sensing device;
A transmitter that transmits the identifier to the other sensing device by the first optical communication;
A sensing device comprising: A sensor information system comprising a sensing device that acquires a plurality of information via a plurality of optical communications performed at a constant communication interval, and a beacon device that transmits position information using optical communications, the sensing device comprising:
First optical communication for acquiring proximity information with another sensing device, and second optical communication for acquiring position information of the sensing device performed at a communication interval longer than the communication interval of the first optical communication A receiving unit for receiving
A processor that converts the first and second optical communications received by the receiver into data;
A memory for storing the converted data;
An ID storage memory for storing an identifier of the sensing device;
A transmitter that transmits the identifier to the other sensing device by the first optical communication;
With
The communication time per time of the first optical communication is shorter than the communication time per time of the second optical communication is a sensing device,
The beacon device is
A location information memory for storing an identification indicating the location of the beacon device;
A position information transmitter that transmits the position information to one of the sensing devices by the second optical communication;
A beacon device characterized by comprising:
A sensor information system characterized by that. The sensor information system according to claim 8,
The sensor information system according to claim 1, wherein the optical communication is communication using infrared light. The sensor information system according to claim 8,
The sensor information system, wherein a communication interval of the first optical communication is longer than a communication time per one time of the second optical communication. The sensor information system according to claim 8,
The sensor device further includes
A first transmission time memory for recording a time at which the identifier should be transmitted from the transmission unit;
With
The beacon device further includes:
A second transmission time memory for recording a time at which the position information should be transmitted from the position information transmission unit;
With
The first optical communication transmitted at the time recorded in the first transmission time memory is not communicated at the same time as the second optical communication transmitted at the time recorded in the second transmission time memory. Sensor information system featuring The sensor information system according to claim 11,
further,
A time management server for transmitting the time recorded in the first transmission time memory and the second transmission time memory,
The sensor device further includes
A first external input unit that allows time to be set in the first transmission time memory via the network from the time management server;
With
The beacon device further includes:
A second external input unit that allows time to be set in the second transmission time memory from the time management server via a network;
A sensor information system comprising:

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