JP5255957B2 - Attention level measurement visualization system - Google Patents

Description

  The present invention can be used in facilities (or venues) at events such as various exhibitions and various explanatory meetings, at classes in schools and various seminars, or at stores such as department stores and mass retailers. Are present at the same time, and there is a one-to-one, one-to-one, one-to-N, and N-to-N area in each area. The present invention relates to a system for calculating and visualizing attention, popularity, or quality as an objective evaluation index.

  The present invention relates to a system that uses various sensor and wireless communication functions and uses a small sensor terminal that can be carried by a person, and calculates the evaluation index based on information collected by the sensor terminal.

Conventionally, it has been possible to measure the degree of attention of each exhibition at an exhibition by counting them based on subjective evaluation indexes in questionnaires using paper media for visitors at exhibitions and the like. However, it is extremely difficult to achieve immediacy of results with paper media, and in recent years, various efforts have been made as described below.
Mobile terminals equipped with infrared communication means, wireless communication means, information input means (multiple buttons), and information output means (liquid crystal display) eliminate the need for information input and are two to three times more than conventional paper-based questionnaires In addition, there is a technology that can achieve the above-mentioned answer rate and can totalize and visualize the results in almost real time and update the visualized information (conventional example 1).

  Japanese Patent Application Laid-Open No. 2004-228867 has a technique in which various sensors are mounted on a portable terminal having a wireless communication function, the state of a person who is carrying is estimated from sensing data, and the degree of impression is obtained for each exhibition. As a specific sensor, a sensor that measures body temperature, sweating amount, and pulse rate is assumed. Note that the presence / absence of the impression and the timing are determined by a conscious operation by the switch of the portable terminal.

  Moreover, in patent document 2 and patent document 3, the stay time and moving speed in a specific area are measured, the attention degree (popularity and interest degree) for every exhibition is calculated from them, and customer trend analysis is performed. .

JP-A-2005-275960 JP 2002-109135 A JP 2006-133915 A

  In both Conventional Example 1 and Patent Document 1, the evaluation is performed based on subjective judgment based on a human button operation or the like. Since it is based on an operation based on subjective human consciousness, it is not reflected in the evaluation at all unless the consciousness for the operation works. That is, there are cases where the evaluation data is insufficient (when the response rate is low), and the quality of the evaluation results is not necessarily sufficient, such as biased evaluation results.

  Patent Document 1 includes a body temperature sensor, a sweating amount sensor, and a heart rate sensor, and can detect changes in an individual's emotion, but directly detects body movements or the like that are directly attributable to the interactive behavior of the presenter and the person to be explained. There is no sensor to do this. Furthermore, since only the person's state is detected and the degree of emotion is obtained, the influence of others cannot be taken into consideration. Furthermore, there is a possibility that the heart rate and the like increase due to the effects of chats and disputes with other people, so that it is erroneously detected that the person is impressed.

  Further, in Conventional Example 1, sensors that acquire data that can be reflected in the evaluation result without the user's awareness are not used. In other words, it is not an objective index because it is merely a subjective evaluation of the user and does not have means for measuring the natural movement of the person. Furthermore, as in Patent Document 1, the influence of others cannot be considered.

  Similarly, in Patent Documents 2 and 3, only the state of the person is detected, and the influence of others cannot be taken into consideration. Furthermore, even if it is possible to detect staying in a specific area and measure the staying time etc., it is unclear whether or not it is interested in the exhibits. It is insufficient.

  Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows. The present invention is an attention level measurement visualization system including a sensor node and a management server that processes data transmitted from the sensor node. The sensor node includes an acceleration sensor that acquires acceleration data, and an evaluation target or other An infrared sensor that acquires infrared data obtained by facing the sensor node; and a wireless transmission / reception unit that transmits the acceleration data and the infrared data to the management server. The management server includes an external communication unit that receives the acceleration data and the infrared data; And an attention level calculation unit that calculates the attention level of the evaluation target based on the acceleration data and the infrared data.

  According to the present invention, it is possible to present an objective index reflecting an exchange with another person without intentionally performing a specific operation as an evaluation index to be evaluated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The application assumed as the first embodiment is the evaluation of the attention level of the display object in the exhibition. More specifically, the evaluation target is for each exhibitor, for each exhibit including a plurality of exhibitors, or for each exhibiting company / institution including a plurality of exhibits.
<First Example Using Name Tag Type Sensor Node>
FIG. 1 shows a system configuration example according to the present invention.

  The exhibition participant WKR1 who is an exhibitor or an instructor of the exhibition holds a sensor node SN0 mounted in a bracelet type or a name tag type. The sensor node SN0 includes a processor circuit CPU0, a radio circuit RF0 to which an antenna ANT0 is connected, a sensor SNS0 for sound / acceleration / temperature / infrared, a memory MEM0 for storing a sensing program MS0, an input device IN0 such as a button, an LCD / LED An output device OUT0 such as a buzzer is connected by a bus BUS0.

  The infrared sensor can detect the pulse in the case of a bracelet type, and the face-to-face with the directly facing infrared device in the case of a name tag type. In other words, when both the exhibitor WKR1 (for example, the exhibitor) and another exhibitor WKR2 (for example, the person to be described) face each other by wearing the name tag type sensor node SN0, they face each other by infrared communication CV1. The state can be detected.

  Further, the activity level of the behavior of the exhibiting participants WKR1 and WKR2 can be detected from the amount of change in the value by the acceleration sensor. Information sensed by the sensor node SN0 is sent to the base station BS1 by the wireless communication WC1 or by the wireless communication WC2 and WC3 via the relay RT1. Information received by the base station BS1 is stored in the sensor database SD1 of the management server SV1 via the network LAN1. The management server SV1 reads the information stored in the sensor database SD1 and performs an analysis process to calculate the attention level for each exhibition object. Also connected to the LAN 1 are a computer PC 1 for displaying the calculation result of the attention level and a computer PC 2 for registering various setting data of the system via a wired or wireless LAN.

  Infrared transmitters BC1 and BC2 are devices that transmit infrared BIR1 and BIR2 at regular intervals, set for each exhibition object, or installed in a place such as a conference room, a laboratory, or a coffee room, and are managed by the management server SV1. Manage location. When an exhibition participant WKR1 wearing a name tag type sensor device SN0 stands in front of the infrared transmitter BC1 or BC2, the infrared rays BIR1 and BIR2 can be detected by the sensor node SN0. The infrared ray includes at least identification information that can be identified by the infrared transmitter BC1 or BC2, and the sensor node SN0 transmits the information to the management server SV1 via the wireless communication WC1, so that the location of each exhibition participant It becomes possible to know.

  The management server SV1 stores an NTP server NTPS for managing time, and manages accurate time by periodically referring to standard time on the Internet.

  The data analysis means (programs) ANAL1 to ANAL4 calculate feature quantities such as face-to-face, activity, aggressiveness, and remarks from the sensor database SD1, and store them in the analysis database SD2. The contents of each table in SD1 and SD2 will be described later. The display database SD2 is separate from SD1, but it may be stored in the same database. Also, the tables are all different on the display, but it is also possible to make a single table by performing outer join based on the time information.

  The values in the analysis database SD2 are converted into attention levels by further data analysis means (programs) ANAL5 to ANAL6, and the attention level visualization means ANAL7 generates a layout for displaying the attention level values for each evaluation target. To do. A detailed analysis procedure for the data analysis means ANAL1 to ANAL6 will be described later.

  FIG. 2 is a diagram showing a more detailed specific example of the hardware configuration of the sensor node SN0 used in the sensor network system of FIG.

  The sensor node SN0 is a wireless transmitter / receiver (RF Transceiver) 201, a display unit (Display) 202, a button (Button) 203, a sensor (Sensor (s)) 204, a microcomputer (MicroProcessor) 205 that is a processing unit, absolute A real-time clock 206 having time, a volatile memory 207, a non-volatile memory 208, a read-only memory 209, and A battery (Battery) 210 that supplies power to each part of the sensor node, a speaker (Speaker) 211, and a microphone (Microphone) 212 are configured.

  The sensor node SN0 causes a microcomputer other than the Real-Time Clock 206, a wireless transmission / reception unit, etc. to sleep in the low power mode in its hardware. The sensor node SN0 uses two types of operation states, a sleep state in which a part of the sensor node SN0 is in a low power mode and a start-up state in which the power of all the circuits is turned on, at regular intervals. In the activated state, the sensor node SN0 checks the state of various input devices by the interrupt controller that has received the signal from the timer, and executes a predetermined operation based on the state. For example, sensing is performed using various sensors Sensor (s) 204. The sensed information is stored in a packet by the MicroProcessor 205 together with the time information of the Real-Time Clock 206, and is transmitted from the RF Transceiver 201 to the relay device RT1 or the base station BS1 via the antenna, and is also an observation value table of the Nonvolatile Memory 208 613 is stored. The observation value table 613 stores data in preparation for a case where the wireless transmission fails, and the sequence number 614 that is a serial number of the observation value and the time at which the observation value is stored or not is set. The unconfirmed flag 615, the observed value 616, and the time 617 of the observed value are stored.

  The operation button Button 203 is an input device that accepts a user operation, and can activate a specific operation of the sensor node SN0 or set an operation parameter by a specific button operation.

  The display unit Display 202 is an output device for displaying information to the user. For example, when the sensor node SN0 is used indoors or outdoors for environmental measurement, the latest measured value measured by the sensor unit Sensor (s) 204 can be displayed. At this time, in order to reduce power consumption, it is preferable to display nothing at normal time and display the latest measured value only when a specific button operation is performed.

  When the sensor node SN0 is a portable sensor node such as a name tag type or a wristwatch type, the time information is normally displayed, and when a text message is received from the management server SV1, the message is displayed. When a voice message is received, it is preferable to display the incoming call information.

  A hierarchical operation menu can be displayed in conjunction with the user's button operation. By performing button operations according to the operation menu, an application user (Application User) or a system administrator (System Manager) may set operation parameters of the sensor node or check error information when communication fails. it can.

  FIG. 3 is a diagram showing a specific example of the hardware configuration of the relay RT1 in the sensor network system of FIG.

  The relay RT1 is a radio transceiver (RF Transceiver) 301 that performs radio transmission and reception via Antenna, a display 302, a button 303, a sensor (Sensor (s)) 304, a microcomputer (MicroProcessor) 305, an absolute A real-time clock 306 having a time, a volatile memory 307, a non-volatile memory 308, and a read-only memory 309 are configured.

  The relay RT1 uses the time setting necessity management table 311 stored in the volatile memory 307 for the purpose of command transmission to the sensor node SN0 and time synchronization. The RF transceiver 301 receives a command to the sensor node distributed wirelessly from the base station, and wirelessly distributes it to the sensor node existing in the table 311. Moreover, the sensing information transmitted from the sensor node wirelessly is received, and the received sensing information is transmitted wirelessly to the base station. In the time setting required node management table 311, a sensor node ID 709 allocated separately for each sensor node and a time setting required flag 710 for determining whether the time has been set for the sensor node of the node ID 709 are stored.

  By installing the relay RT1 between the sensor node SN0 and the base station BS1, the communication distance between them can be extended, but in order to receive data from a sensor node or base station that does not know when it is transmitted. Must always be waiting. Therefore, unlike a sensor node, it is desirable to operate by external power supply instead of a battery. Power supplied from a power line is rectified by a power supply circuit 310 and then supplied to each functional unit. Thereby, since it is not necessary to worry about power consumption, the microcomputer 305 of the relay RT1 does not need to have a sleep state as in the case of the sensor node SN0. For this reason, the interrupt controller and timer unit (Timer) are omitted in the figure, but these functions are utilized within the scope of a general data transmission / reception algorithm.

  FIG. 4 is a diagram showing a specific example of the hardware configuration of the base station BS1 in the sensor network system of FIG.

  The configuration of the base station BS1 is the same as that of the relay RT1 except that it includes a LAN communication interface (LAN I / F) 412 for communicating with the management server SV1 via an IP network (IP Network). The description is omitted. The number numbers 401 to 410 in FIG. 4 correspond to the number numbers 301 to 310 in FIG. The volatile memory 407 stores a binding table 411 necessary for grasping and managing the currently operating node and its type. The binding table 411 stores a type storage area 809 for storing whether a registered node is a relay station or a sensor node, and a node ID 810 given individually for each node.

  FIG. 5 is a block diagram showing a specific example of the hardware configuration of the management server SV1 of the sensor network system of FIG.

  The management server SV1 includes a processing unit (CPU) 501, an external communication unit 502, a power source 503, a hard disk drive 504, a keyboard 505 that is an input device for giving commands from a user, a display 506 that is a display device, and a memory 507. .

  The management server SV1 receives data collected from the sensor node SN0 by the base station BS1 via the relay RT1 and transmits commands to the base station BS1 via the external communication unit 502. The CPU 501 reads a program such as middleware stored in the memory 507, processes data such as observation values acquired through the external communication unit 502 according to the instructions of the program, accumulates the data in the hard disk drive 504, and displays it on the display 506 To do. A specific example of processing / display executed by the management server SV1 will be described in detail later. The CPU 501 interprets the user command input from the keyboard 505 and distributes it to the base station BS1 and the like through the external communication unit 502.

  FIG. 6 is a diagram showing an example of the configuration and data of the sensor data database SD1 stored in the management server SV1. In the database SD1, sensor data, identification information of sensor devices used by exhibition participants, identification information of exhibition participants, and the like are managed in association with each other.

  The table TIR is a table stored in association with the infrared detection data observed at the sensor node SN0, or the time (Timestamp) at which the temperature data or illuminance data was observed.

  The column RMACID stores an identifier (for example, a network address) of a sensor node (for example, SN0).

  In the column RUPTM, the time when the data is stored in the table SD1 is recorded.

  The column RGWAD stores the identifier (for example, IP address and port number) of the base station (for example, BS1) that has received the data wirelessly.

  The column RAPHD stores the type of the sensor node SN0. For example, “1” is stored in the bracelet type device, and “2” is stored in the name tag type device.

  The column RDATY stores the type of data stored in the wireless packet. For example, “1” is used for data in which temperature data, illuminance data, and infrared detection data are stored as a set, “2” is used for acceleration data stored in a table TACC1 described later, and audio data stored in a table TVO1 described later is used. Stores “3” or the like.

  The column RSENU stores a value of a periodic counter that is assigned from 0000 to FFFF in the order of frame transmission by the sensor node, and is reset to 0000 after FFFF. When the divided frames are combined, the sequence number of the first frame is stored.

  In the column RSAID, the same sampling identifier is assigned to divided frames including data sampled in the same sensing period.

A column ROBPE stores sensing intervals of data such as temperature and acceleration.
The column RSEPE stores the current wireless transmission interval of the sensor node. It may be a numerical value representing the interval or a value that is several times the sensing interval.

  A column RSARA stores a sampling period of sensor data in the sensor node.

The column RSANU stores the current number of samplings at the sensor node.
In a column RUSID is stored an identification ID of a user who is carrying and using the sensor node.

  In the column RFRNU, if the frame is divided into a plurality of divided frames, n, n−1, n−2,..., 2, 1, and the values in descending order are stored. 1 represents the final divided frame, and 0 represents the 256th frame.

  The column RFRSI stores the total number of a series of frames transmitted in a divided manner.

  The column RIST stores the time of the sensor node when data such as temperature and acceleration is acquired by the sensor.

  The column RTEMP stores temperature data acquired by the sensor node with the temperature sensor.

  In the column RLUX, the illuminance data acquired by the sensor node with the illuminance sensor is stored.

  A column RBALE stores a value indicating the remaining battery level of the sensor node, for example, a power supply voltage.

  A column RLQI stores a value indicating the wireless communication quality between the sensor node and the relay station or the base station, for example, LQI (LINK QUALITY INDICATOR).

  In the column RIRDS, the number of detected infrared data stored in the column RIR is stored.

  The column RIR stores infrared data (an identifier of an infrared transmission source) acquired by the sensor node with the infrared sensor.

  The table TACC1 stores acceleration sensor data instead of data such as infrared rays in the table TIR. The same contents as the table TIR1 are stored between the column RMACID and the column RIST.

  The column RACDS stores the number of acceleration data stored in the column RACC.

  The column RACC stores acceleration data acquired by the acceleration sensor of the sensor node.

  The table TVO1 stores audio data instead of data such as infrared rays in the table TIR. The same contents as the table TIR1 are stored between the column RMACID and the column RIST.

  The column RVODS stores the number of audio data stored in the column RVODA.

  In the column RVODA, audio data acquired by the microphone of the sensor node is stored.

  In this way, by recording correspondence relationships such as sensor data, sensor node identification information, exhibition participant identification information, etc., even if each exhibition participant uses multiple sensor nodes, each exhibition participation Sensor data acquired by a person's sensor node can be correctly managed. In addition, by referring to the sensor database SD1, it is possible to calculate the degree of face-to-face activity and attention of the exhibiting participants described later, and create each table stored in the quality database SD2.

  Next, a method of obtaining the activity level of actions such as the face-to-face between the participants (explainer and the person to be explained) in the exhibition hall and the degree of attention for each evaluation target will be described. FIG. 7 shows a rough processing flow in the system, focusing on data analysis processing in the management server.

  First, various physical phenomena on the floor of the exhibition hall including human actions are performed by using an infrared sensor, an acceleration sensor, and a voice sensor (microphone) mounted on the sensor node SN0, an identifier list, acceleration data, It is converted into audio data, and at least time data is given and transmitted to the management server SV1.

  The management server SV1 first analyzes the presence / absence of an identifier included in the infrared data in each time zone for each sensor terminal carried by the exhibitor or the person to be explained. The evaluation object specifying means ANAL1 refers to the table TIR1, specifies whether the identifier is an identifier from an infrared transmitter installed adjacent to the exhibit in the exhibition hall, and the participant observes The evaluation target list SD201 is output. In parallel, the person-to-person identification means ANAL2 refers to the table TIR1 to identify whether the identifier is an identifier from a sensor terminal carried by the person to whom he / she meets, and a person-to-person list SD202 in which the participants faced during the exhibition tour Is output. In parallel with the management server SV1, the action identification means ANAL3 refers to the table TACC1, analyzes the acceleration data in each time zone for each sensor terminal (for each explainer or for each person to be explained), and outputs the active action list SD203. . At the same time, the speech identification means ANAL4 refers to the table TV01, analyzes the voice data in each time zone for each sensor terminal (for each explainer or each person to be explained), and outputs the speech list SD204.

  Next, the face-to-face activity evaluation means ANAL5 outputs the face-to-face activity degree list SD205 in each time zone for each sensor terminal (for each explainer or for each person to be explained) from the face-to-face list SD202, the activity action list SD203, and the speech list SD204. . In addition, although demonstrated in FIG. 8, a face-to-face activity level list | wrist can be output based on a face-to-face person list and an active action list. Further, by using the audio data TVO1 and the speech list SD204 supplementarily, it is possible to increase the accuracy and output the attention level list in consideration of the content of the speech. Further, the attention level calculation means ANAL6 analyzes the evaluation target list SD201 and the face-to-face activity level list SD205, and outputs the attention level list SD206 in each time zone for each evaluation target.

  Further, the attention level visualization means ANAL7 outputs the attention level content SD207 representing the attention level in the attention level list SD207 such as a table format, a graph format, and a floor plan format. The result is displayed on the attention level display means PC1 which is a monitor of a computer connected via the network LAN1 or a large screen display. The attention level display means may be the sensor terminal SN0 carried by the presenter or the person to be explained.

  Thus, the attention level for each evaluation object is calculated and displayed based on the infrared detection data and the acceleration data. Thereby, an evaluation index can be obtained without a participant consciously performing a specific operation, and the risk of biasing evaluation results can be prevented. Furthermore, it is possible to detect body movements and the like that are directly attributable to the interaction between the participant and the presenter, and to obtain an objective evaluation index that takes into account the influence of others.

  In addition, by calculating the attention level using audio data, the accuracy can be improved, and the evaluation index can be calculated based on the content of the statement.

  Next, data analysis in the management server SV1 will be described in more detail with reference to FIG.

  First, the procedure in which the action identifying unit ANAL3 generates the active action list SD203 will be described. The following acceleration frequency calculation (A301), active motion determination (A302), and noise removal (A303) are performed according to the procedure shown in FIG.

  The acceleration frequency calculation (A301) is a process for obtaining a frequency from acceleration data (TACC1) arranged in time series. The frequency is defined as the frequency of the wave per second, that is, an index representing the intensity of vibration that can be monitored by acceleration. Although the magnitude of the frequency component may be steadily calculated by Fourier transform, in this application example, in order to simplify the calculation, a zero cross value is used as an index for frequency. As a result, the processing load on the management server is reduced, which is also effective as a countermeasure against an increase in the amount of calculation of the server due to an increase in the number of sensor nodes.

  The zero cross value is the number of times the time-series data value becomes zero within a certain time period, more precisely, the time-series data is changed from a positive value to a negative value, or from a negative value to a positive value. And the number of changes. For example, when the period from when the acceleration value changes from positive to negative until the value changes again from positive to negative is regarded as one cycle, the vibration per second is calculated from the counted number of zero crossings. A number can be calculated. The vibration frequency per second calculated in this way can be used as an approximate frequency of acceleration.

  Furthermore, since the sensor node SN0 of this application example includes a triaxial acceleration sensor, one zero cross value is calculated by summing the zero cross values in the triaxial direction during the same period. Thereby, in particular, a fine pendulum motion in the left-right and front-back directions can be detected and used as an index representing the intensity of vibration.

  As a “certain period” for counting the zero-cross value, a value larger than the continuous data interval (that is, the original sampling interval) is set. For example, the zero cross value per second and the zero cross value per minute are obtained.

  As a result of the acceleration frequency calculation (A301), the zero cross value at each time and the vibration frequency per second calculated therefrom are generated on the memory as an acceleration list or as a file.

  Next, active motion determination (A302) is performed on this acceleration list. Here, from the results of video observation and the like, it was found that there is a tendency in the relationship between the behavior rhythm represented by the frequency of the acceleration data and the motion pattern, as shown in FIG. For example, when speaking, the frequency component from 2 Hz to 3 Hz is high. Therefore, a time zone in which the frequency of the acceleration data exceeds a certain threshold is set as a state of active action. As a result of analysis of actual data, it has been found that the threshold value of acceleration frequency is typically 2 Hz. However, since this threshold value varies depending on the environment of the person and the venue, the setting can be changed according to the situation.

  The acceleration list is sequentially scanned, and “1” is inserted as a determination value in a row in which the vibration frequency is higher than the threshold value, and “0” is inserted in a determination value in a row where the vibration frequency is lower. As a result, an active action list is generated in which whether or not an active action is being performed in each time slot is obtained in seconds.

  Here, even if it is less than the threshold at a certain moment, the time before and after is more active than the threshold, and conversely, it is more than the threshold at a certain moment. There is also a possibility. A mechanism for removing such instantaneous noise is required.

  Therefore, noise removal (A303) is performed on the active operation list. The role of noise removal is to generate a series such as “0000000111111111111” that removes the instantaneous change by adding the context to the time series change of the degree of concentration obtained above, for example “0001000111111001111”. It is. By performing such noise removal processing, the activity level can be calculated in consideration of the time zones before and after that, and the activity level reflecting the actual situation can be grasped more. The effect of noise removal processing such as face-to-face determination described below is also the same.

  Although the process of removing noise can be performed by removing high-frequency components using a low-pass filter, a majority method will be described here as a simpler method. In this method, the determination is made one by one from the beginning to the end in chronological order. Assume that the i-th time zone is the target of determination. Here, regarding the total 2n + 1 time zones from the i-n-th time zone to the i + n-th time zone, the number that is active and the number that is not active are counted. Here, if there are more active numbers and the i-th time zone is not active, the i-th state is changed to an active state. Conversely, if there are more inactive states, the i-th state is changed to an inactive state. For example, when this method is applied to a sequence “0001000111111001111” with n = 2, a sequence “0000000111111111111” is generated. If n is small, noise reflecting only the short time is removed, and if n is large, noise reflecting long time is removed. The degree of n depends on the person and the type of action, but it is also possible to remove small noise with a small n first, and then remove a little longer noise with a large n again. By executing the majority method in this way, the calculation amount of the management server can be reduced and the processing load can be reduced.

  As a result, an active action list (SD 203) obtained in units of seconds as to whether or not it is active in each time zone is generated.

  In this way, it is possible to determine whether or not the participant is actively acting based on the acceleration data acquired by the acceleration sensor of the sensor terminal.

  Next, a procedure in which the evaluation target specifying unit ANAL1 and the person-to-be-identified identification unit ANAL2 obtain the meeting with the exhibit and the meeting between the persons (the time during which they face each other) will be described. Whether or not a person is in front of an exhibit in a certain time zone is determined based on infrared data transmitted from BCn from the infrared transmitters BC1 in which the sensor terminal SN0 worn by that person is installed in the exhibit. It can be determined by whether or not it is detected.

  Also, whether a person is facing another person during a certain time zone is whether the sensor terminal worn by the person detects infrared data transmitted from another sensor terminal during that time zone. Can be determined.

  However, in this case as well, as in the above-described determination of the degree of activity, there is a possibility of erroneous determination when only a certain moment is seen, so it is necessary to remove noise by looking at the preceding and following time zones. Therefore, the determination is made by the following face-to-face determination (A101) and noise removal (A102, A202). FIG. 8 shows a flow.

  In the face-to-face determination (A101), it is determined in predetermined time units (for example, seconds) whether or not the person to be determined has detected an identifier included in the infrared data at each time. From the infrared database (TIR1), whether or not there is detection data in a certain time zone is examined in order, and if it is detected, “1” is inserted in the determination value, and if it is not detected, “0” is inserted. In addition, depending on whether the detected identifier is the identifier of the infrared transmitter BCx or the identifier of the sensor terminal SNx carried by another person, it is switched whether to output as an evaluation target list or as a face-to-face list. .

  As a result of the face-to-face determination (A101), an evaluation target list or face-to-face list obtained in a predetermined time unit (for example, in seconds) as to whether or not they face each other is generated on a memory or as a file.

  Next, noise removal (A102, A202) is performed on the evaluation target list and the face-to-face list. The role of noise removal is the same as the noise removal (A303) in the above-described activity calculation, and the instantaneous time series change, for example, “0001000111111001111”, is added to the series to remove the instantaneous change. For example, a sequence “0000000111111111111” is generated. A method similar to noise removal (A303) can be applied to this.

  As a result, an evaluation target list (SD201) and a face-to-face person list (SD202) in which whether or not they are facing each time are determined in a predetermined time unit (for example, in seconds) are generated. FIG. 8 shows an example in which a certain participant faces the exhibit A06 at 10:01:00 and 20 seconds and faces another person WKR3.

  In this way, based on the data acquired by the infrared sensor of the sensor node, it is possible to determine which exhibits or who are facing each participant in a certain time zone, and the meeting time.

  Next, the procedure for obtaining the degree of face-to-face activity indicating the positiveness of face-to-face with a person will be described. Being active at the face-to-face appears in actions such as an increase in the amount of body movement and an increase in the amount of speech. Therefore, here, the active action list (SD203) determined based on whether or not the frequency of the acceleration described above exceeds a certain threshold as to whether or not it is aggressive, and whether or not to speak when meeting Judgment is made from two indices, the list (SD204).

  Here, according to the flow of FIG. 8, the speech list (SD204) generated from the speech section detection (A401) and its noise removal (A402), the already-explained face-to-face list (SD202), and the active action list (SD203) The procedure of face activity evaluation (ANAL5) for generating the face activity level list (SD205) by combining the above will be described.

  In the speech section detection (A401), a section in which a person is speaking is specified from the voice signal acquired by the sensor terminal SNx. As a method for detecting a speech segment from a speech signal, a method using short-time speech power, a method based on phoneme recognition results, or the like can be used.

  As described above, the sensor terminal SNx often operates intermittently with low power orientation, and it is difficult to acquire audio signals in all time zones. Therefore, phoneme recognition can be applied only partially. Therefore, here, it is determined whether or not the speech is made depending on whether or not the sound power for one second in a certain time zone exceeds a certain threshold value. When the voice signal is operated in time series and the voice power for a certain period exceeds the threshold, “1” is inserted if the voice is spoken, and “0” is inserted if the voice power is not exceeded.

  As shown in FIG. 8, as a result of the speech section detection (A401), a speech list in which whether or not speech is made at each time is determined in a predetermined time unit (for example, in seconds) is generated in a memory or as a file. The

  The next noise removal (A402) is a process equivalent to the noise removal (A303) of the active action list based on the acceleration described above. Instantaneous noise is detected and corrected from time-series changes. As a result, an utterance list (SD204) in which whether or not the utterance is made at each time is obtained in a predetermined time unit (for example, in seconds) is generated.

  Next, using the generated face-to-face list (SD202), active action list (SD203), and speech list (SD204), a face-to-face activity evaluation (ANAL5) is performed, and a face-to-face activity list (SD205) at each time is obtained. calculate. The face-to-face activity level can be determined based on whether or not the face-to-face activity is active when face-to-face. For example, as shown in FIG. 8, the face-to-face list and the active action list are sequentially scanned in time series, and the data of the face-to-face list is in the face-to-face state and the data of the active action list is in the active state with respect to a certain time period. If there is, it is considered to be positive and the judgment value is “2”. On the other hand, when the data in the face-to-face person list is in the face-to-face state and the data in the active action list is in the inactive state, it is regarded as not active and the determination value is “1”. Also, if the data in the face-to-face person list is in a non-face-to-face state, the determination value is set to “0” because it is not necessary to make a determination.

  Thus, the activity level at the time of meeting can be calculated using the meeting person list obtained from infrared data and the active action list obtained from acceleration data.

  Furthermore, by using the speech list, that is, by determining whether or not the conversation is actually performed, the accuracy of the activity level at the time of meeting can be improved. Although not shown, for example, the face-to-face list, the active action list, and the speech list are sequentially scanned in time series, and the data of the face-to-face list is in a face-to-face state and the data of the active action list is When the data is in the active state and the speech list data is in the speech state, it is considered to be active and the determination value is set to “3”. When the face-to-face list data is the face-to-face state, the active list data is the active state, and the speech list data is the non-speech state, the determination value is “2”. When the face-to-face list data is in the face-to-face state, the active list data is in the inactive state, and the speech list data is in the non-speaking state, the determination value is “1”. When the data of the face-to-face person list is in the non-face-to-face state, the determination value is set to “0” because it is not necessary to determine.

  Furthermore, by using the phoneme recognition result, the accuracy of the activity level at the time of meeting can be increased. Specifically, if the phoneme recognition result determines that the participant is chatting with the presenter, or is in a dispute, the determination value is determined as that it is not necessary to determine the degree of face-to-face activity. “0” may be set. As a result, it is possible to eliminate the influence of chats and disputes with others.

  Next, a procedure for calculating the attention level will be described with reference to FIG. Attention level calculation (ANAL6) is based on the person's face-to-face activity level list (SD205) during the time period when an exhibit that a certain participant is viewing is specified based on the evaluation target list (SD201). Depending on whether or not the activity level is detected, the attention level list (SD206) of the person is created. In the example of FIG. 8, the face-to-face activity level determination value is recorded in the attention level determination field, and the combination of the object determination in the evaluation object list and the object in the face-to-face activity level list is recorded in the object field. That is, for the time when the evaluation target list was a sequence of (0, “A06”, “A06”), the face-to-face activity list is (0, “2, WKR3”, “1, WKR3”), A series of (0, “2, A06 + WKR3”, “1, A06 + WKR3”) is generated as the attention level list. A similar process is performed for each participant, and an attention list is generated for each participant.

  Further, in the attention level calculation (ANAL6), the attention level list obtained for each of the plurality of participants is aggregated for each exhibit, and can be converted into the attention level list for each time zone for each exhibit. At this time, for example, in the case where the target column of the attention level list is “A06” + “WKR3”, when the detection of the exhibit overlaps with the detection of the conversation activity level with the exhibiting presenter, the corresponding attention is given as two points. The total value with the degree judgment value is obtained. A case where only the exhibit is detected as in “A06” is taken as one point, and a total value with the corresponding attention level determination value is obtained. By accumulating these, the degree of attention for each exhibit is calculated as a numerical value.

  Furthermore, in the attention level calculation process (ANAL6), the attention level obtained for each of the plurality of participants can be converted into an attention level list for each time slot for each exhibition presenter by counting up for each exhibit presenter.

  Furthermore, by using the calculated degree of attention for each exhibit, and summing up for each exhibiting exhibitor company or institution, it can be converted into a degree of attention list for each time zone for each exhibiting exhibitor company or institution.

  Further, the time zone can be set as appropriate, such as 10 minutes later, every hour, every day. This makes it possible to visualize the degree of attention under various conditions and analyze the exhibition status.

  The attention level visualization means (ANAL7) in FIG. 7 converts the above-mentioned attention level into the attention level content (SD207) in a table format or a graph format, or draws attention according to the level of attention level quantified for each exhibit. You can rank them and convert them to a table format. Furthermore, ranking can be created for each time zone, and the transition of the ranking can be converted into a table format or a line graph format.

  FIG. 10 shows an example of attention level content. The upper half of FIG. 10 is an example showing the exhibition attention ranking. The exhibition number for identifying the exhibit, the name of the exhibit, and the exhibitor name of the exhibit are shown in a table format. The lower half of FIG. 10 is an example in which the numerical value of the degree of attention is expressed by a square size and visualized at the position of each exhibition on the floor diagram assuming the exhibition hall.

  FIG. 11 is an example of a screen that is simply displayed on a portable sensor terminal SN0 or the like, and is a display example assuming a scenario in which the exhibitor himself / herself confirms the attention level of his / her exhibition. This figure shows the result of the attention level calculation (ANAL6) totaling the attention level for each exhibiting presenter, and is displayed by creating the ranking of the attention level of exhibiting presenters.

  As a result, the person to be explained (visitor) at the exhibition can receive the feedback of the attention level for each evaluation target (exhibition) and reflect it in his / her behavior with reference to the objective attention level. For example, based on one's own interests, it is possible to determine the objects to be preferentially visited with reference to the degree of attention at each exhibition, and to view the exhibition effectively and efficiently.

  In addition, the presenter at the exhibition will help to encourage the motivation of explanation activities by receiving feedback on the degree of attention of the exhibits being explained. For example, at an exhibition or the like, it is possible to grasp the quality of one's own explanation in almost real time, which can lead to a devise of how to explain thereafter.

  In addition, exhibiting companies and institutions at the exhibition can grasp trends in related market fields from the degree of attention similar to their own products.

Furthermore, for organizers of events such as exhibitions, it is possible to devise ways to manage events so that the events become more prosperous and of high quality during the event period by grasping the degree of attention of all evaluation targets. it can. Alternatively, the quality of the event can be quantified and used to verify the return on investment.
<Second embodiment in which camera images are linked>
Next, a second embodiment will be described. The system disclosed in this embodiment is a system in which a camera is installed in an exhibition hall as shown in FIGS. The fixed node corresponds to the infrared transmitters BC1 and BC2 in FIG. 1, and the mobile node corresponds to the sensor node in FIG.

  In this system, when the activity level of the exchange activity is obtained, not only the acceleration data and infrared data but also the camera image is processed and complemented. Thereby, the reliability of the activity level of an exchange activity can be raised. In addition, images from cameras that have been determined to have high priority, specifically video data from cameras installed near the evaluation target with high attention, should be preferentially transmitted and preferentially displayed on the display terminal. Features. This makes it possible to change the priority for handling video data in accordance with the level of attention. Hereinafter, it demonstrates in detail using FIGS.

  FIG. 19 is a block diagram showing an example of the configuration of a video network system to which the present invention is applied. 19, the video network system includes a camera group 2-0 and 2-1 including a plurality of cameras 220, a center 1 that controls the plurality of cameras 220 and displays an image of a desired camera 220, and a center 1 A network 100 that connects the camera groups 2-0 and 2-1 and a sensor network 8 that is connected to the sensor information conversion device 7 of the center 1 and transfers information (sensor information) from the sensor node are mainly configured. . FIG. 12 is a block diagram showing an outline of communication between components of the video network system of the present embodiment.

<Configuration of video network system>
The video network system of this embodiment includes a plurality of cameras 220, a camera PC 210 connected to the cameras, an image search device 6 that searches for images handled by the system, and an image storage device 4 that stores images taken by the camera 220. , A transmission control device 20 that controls transfer of an image taken by the camera 220, a request conversion device 3 that relays an image request from the image storage device 4, and an image display device 5 that displays an image taken by the camera 220. (And monitor 50).

  Furthermore, the video network system of this embodiment includes a sensor network 8 in which a plurality of nodes are connected by a wireless network. The sensor network 8 includes a mobile node 810, a fixed node 820 that performs infrared communication with the mobile node 810, a radio base station 800 that performs radio communication with the mobile node 810, and a sensor information conversion device that collects information transmitted from the nodes 810 and 820. 7 (corresponding to the management server SV1 in FIG. 1) and a position information display terminal 9 for displaying the position of the mobile node.

  According to the video network system of the present embodiment, a plurality of cameras 220 are installed in a building or the like. The image storage device 4 stores an image acquired by each camera 220. The image display device 5 is installed in a monitoring center, and an administrator or a monitor uses the image monitoring device 5 (monitor 50) to monitor the images of the plurality of cameras 220.

  The image display device 5 includes a processor, a memory, a network interface, an operation unit, and a display unit. The image display device 5 is a computer operated by an administrator of the video network system, and is selected from image data captured by a plurality of cameras 1. Alternatively, all image data is displayed on the monitor screen 50. Specifically, the image display device 5 displays thumbnail images (reduced images) of images taken by the plurality of cameras 220, and displays the images taken by the selected camera 220 with high definition.

  In addition, when receiving an event from the nodes 810 and 820, the image display device 5 preferentially displays an image of the camera 220 corresponding to the position of the fixed node 820 related to the event on the monitor screen 50. The fixed node 820 is fixed at a known position and is associated with the camera 220. Then, based on the event transmitted from the nodes 810 and 820, the image display device 5 displays an image of the camera 220 corresponding to the event occurrence position, so that the passage of a person or an object can be monitored. Here, the event indicates detection of infrared data by the mobile node 810 or the fixed node 820 and connection between the mobile node and the base station.

  Further, the image display device 5 acquires from the image storage device 4 an image captured by the camera 220 selected by the administrator through the operation of the operation unit, and the image captured by the selected camera 220 with high definition. indicate. At this time, the identifier of the selected camera 220 is directly transmitted to the transmission control apparatus 20 as the selected camera ID, and the transfer control apparatus 20 controls the transfer so that the priority of the image data of the corresponding camera becomes high. Good.

  In order to realize the above-described functions, the monitoring center 1 is provided with an image display device 5, an image storage device 4, an image search device 6, a request conversion device 3, and a sensor information conversion device 7.

<Configuration of camera group>
The plurality of cameras 220 are divided into a plurality of camera groups, and each camera group is set for each predetermined region (for example, each floor) such as a building or for each predetermined number of cameras 220. One or a plurality of camera PCs 210 and one transmission control device 20 are installed for each camera group. The number of camera PCs 210 is determined according to the relationship between the system scale and the processing performance between the components.

  The camera 220 includes an optical system including a lens, an imaging unit that converts an image into an electrical signal, and a communication interface. For example, the camera 220 can be an IP camera that can be directly connected to an IP network or a USB camera that can be connected via a serial bus. The camera 220 is installed in the shooting target area, takes an image of the shooting target area, and outputs the shot image data at a predetermined frame rate and resolution. The camera 220 is connected to the camera PC 210 via a network or a serial bus.

  The camera PC 210 (information generation device) is a computer including a processor, a memory, and a network interface.

  The camera PC 210 transmits the moving image shot by the camera 220 to the image storage device 4 in predetermined units (for example, every frame, every GOP) in response to a request from the image storage device 4. Therefore, the camera PC 210 transmits the latest image (for example, an image of one frame) to the image storage device 4 only when an image request is received from the image storage device 4, and other images (for example, past frames). Are deleted when the generation of thumbnail images and the extraction of the feature amount, which will be described later, are completed.

  The camera PC 210 extracts an image feature amount from image data captured by the camera 220 by executing an image registration program. Extraction of the extracted image feature amount uses motion detection and face detection techniques, and may extract a predetermined motion or a predetermined face from captured image data. Furthermore, the camera PC 210 generates low-definition image data (thumbnail image) from the captured image data by executing an image registration program.

  The thumbnail image is obtained by reducing the resolution of a moving image shot by the camera 220. For example, when the camera 220 outputs an image with a resolution of 640 × 480 dots (VGA), the camera PC 210 generates an image of 128 × 96 dots as a thumbnail image.

  In the following description, an image having a higher resolution than the original image or thumbnail image captured by the camera 220 is referred to as a high-definition image.

  The extracted image feature amount and the generated low-definition image data are sent to the image search device 6 via the network.

  Although one camera PC 210 is illustrated in FIG. 12, a plurality of camera PCs 210 may be provided. Further, the number of cameras connected to one camera PC 210 can be arbitrarily selected according to the capacity of resources provided in the camera PC 210. Note that the processor of the camera 220 may have the function of the camera PC 210 by executing an image registration program.

  Information transmitted from the camera PC 210 to the image storage device 4 and information transmitted from the image storage device 4 to the camera PC 210 are transferred via the transmission control device 20.

  Each camera PC 210 is given a predetermined identifier (for example, an IP address) in advance. The image storage device 4 uses the identifier assigned to the camera PC 210, or a combination of the identifier assigned to each camera 220 when a plurality of cameras 220 are associated with one camera PC 210. Is identified.

  The image storage device 4 is a computer including a processor, a memory, a storage device, and a network interface. By executing the image storage server program, the image storage device 4 transmits a high-definition image request to the camera PC 210, acquires image (movie) data captured by the camera 220, and acquires the acquired image data. Store in storage. Specifically, the image storage device 4 transmits an image request to the request conversion device 3 by designating the IP address of the camera PC 210 that acquires the image.

  Further, the image storage device 4 transmits the stored image data to the image display device 5 based on an image request from the image display device 5. Although one image storage device 4 is illustrated in FIG. 12, a plurality of image storage devices 4 may be provided.

  The request conversion device 3 is a computer including a processor, a memory, and a network interface. It may be a network device (for example, a switch or a router) having an address conversion function.

  When receiving the image request from the image storage device 4, the request conversion device 3 converts the destination of the received image request into an address and a port number of the transmission control device 20 of each camera group, as will be described later, and transmits it to the network. .

  When receiving an image request from the request conversion device 3 via the network, the transmission control device 20 specifies the camera PC 210 from the destination port number of the image request and transfers the image request to the specified camera PC 210. For this reason, the transmission control device 20 includes a transfer destination table indicating the correspondence between the port number and the camera PC 210. In the transfer table, the correspondence between the port that received the image request and the destination (for example, URL) of the transfer destination of the image request is set.

  In response to an image request from the transmission control device 20, the camera PC 210 sets the latest image (high-definition image) in a predetermined unit (for example, one frame) together with information indicating the priority (for example, the feature amount of the image). Send back. The transmission control device 20 sets the port number that identifies the camera PC 210 that is the transmission source of the image as the destination port number, and transmits the image received from the camera PC 210 to the request conversion device 3. The request conversion device 3 identifies the camera PC 210 that is the image transmission source from the destination port number of the received image, sets the IP address of the identified camera PC 210 as the transmission source address, and then receives the image received from the request conversion device 3. The image is transmitted to the image storage device 4. The image storage device 4 specifies the camera PC 210 from the IP address of the transmission source of the received image and stores the image.

  The transmission control device 20 receives the reply message from the camera PC 210, and the high-definition image according to the priority information included in the reply message and the information (sensor information) from the sensor information conversion device 7 and the image display device 5. The priority of sending a reply message including is determined. The priority for each camera PC 210 managed by the transmission control device 20 is stored in the priority history table 240 shown in FIG. A priority history table 240 shown in FIG. 20 is set in advance in the transmission control apparatus 20, and stores the camera ID 2401 that stores the identifier of the camera PC 210 in one entry and the latest priority of the image of the camera PC 210. The latest priority 2402 to be stored, the average priority 2403 for storing the average value of the priority of the image, and the sensor information 2404 for storing the information received from the sensor information conversion device 7 and the display PC 5 are included.

  The sensor information 2404 stores detection information (priority camera ID) from the sensor information conversion device 7 and a priority instruction of the camera PC 210 from the image display device 5. For example, in FIG. 20, the sensor information 2404 of the entry of camera ID 2401 = Camera 3 stores information “disp” as information indicating that there is an instruction to increase the priority from the image display device 5.

  In FIG. 20, “Nameid1” and “Nameid2” are stored in the sensor information 2404 of the entry of camera ID 2401 = Camera2 as identifiers of the mobile node 810 from the sensor information conversion device 7. It shows that the mobile node 810 having passed through the vicinity of the fixed node 820. As described above, when the sensor information 2404 includes any value, the transmission control device 20 transmits the information of the corresponding camera ID with the highest priority.

  FIG. 21 shows an example of processing performed by the transmission control device 20, and is a flowchart of processing executed when an image request message is received from the request conversion device 3.

  First, when receiving an image request message from the request conversion device 3, the transmission control device 20 searches the transfer destination table 230 using the reception port as a key to determine the transfer destination camera PC 210 as described above, and transfers the image request. (S11).

  Then, the transmission control device 20 receives the reply message from the camera PC 210, and extracts the priority of the image included in the header of the reply message and the ID of the camera 220 or the camera PC 210 (S12). The priority of the image is substituted for the variable Pnow.

  Next, the transmission control device 20 searches the priority history table 240 using the ID of the camera PC 210 as a key (S13). If sensor information is present in the retrieved entry, the image of this camera PC 210 is treated as the highest priority, so transfer processing is performed without inserting a delay (S14, S24, S20).

  In the transfer process of step S20, priority information and sensor information are added to the header of the reply message and transmitted to the request conversion device 3. At this time, in the IP network between the transmission control device 20 and the request conversion device 3, the IP priority between the transmission control device 20 and the request conversion device 3 is written by writing the priority of the image not only in the reply message but also as the priority information of the packet of the IP layer which is the lower layer It can also be used for level priority control.

  On the other hand, if it is determined in step S14 that there is no sensor information in the retrieved entry, normal transmission priority determination processing is performed in step S15 and subsequent steps. In step S15, it is determined whether or not the priority of the image included in the reply message is zero. As a result of the determination, if the priority of the image included in the reply message is 0, the process proceeds to step S21. If not, the process proceeds to step S16.

  In step S21, since the priority of the image is 0, it is determined that the priority of the image is very low, and an image request is made to the transfer destination camera PC 210 again. At this time, in order to prevent the reply to the storage device 4 from being interrupted due to the repetition of the image request for a long period, the repetition process is performed only when the number of repetitions is less than a predetermined upper limit of 10 ( S23, S11) When the number of repetitions reaches 10, the above transfer process is performed after the priority is minimized (S22, S20). When the image request is repeated to the camera PC 210, a predetermined delay (for example, 200 msec) is inserted in step S23.

On the other hand, if it is determined in step S15 that the priority of the image is a positive value, the process proceeds to step S16 and the current image priority Pnow extracted in step S12 is stored in the priority history table 240. A value obtained by subtracting the average priority 2403 is calculated as the latest priority 2402. If the latest priority is P'now and the average priority is Pave,
P'now = Pnow-Pave
It becomes. With this process, the priority of the image of the camera PC 210 once set to a high priority is gradually lowered with the passage of time if there is no instruction from the sensor information or the image display device 5.

Next, in step 17, the transmission control device 20 updates the values of the average priority and the latest priority in the priority history table 240. Here, a new average priority 2403 is obtained by taking a weighted average between the average of the priorities up to the previous time and the latest priority of the image. That is, if the new average priority is P'ave,
P′ave = (99 × Pave + Pnow) ÷ 100
It becomes. The transmission control apparatus 20 stores the new average priority P′ave in the average priority 2403 of the entry of the camera ID 2401 currently focused on, and stores the latest priority Pnow obtained in step S16 in the latest priority 2402. .

  In step S18, the latest priority 2402 obtained in step S16 is compared with the latest priorities 2402 of other camera IDs in the priority history table 240, and the priority of the camera ID currently focused on is compared. Find the degree ranking. Next, in step S19, when the transmission priority of the camera PC 210 enters the top three, the process proceeds to the transfer process without inserting a delay. On the other hand, if it is lower than the top four, each time the priority of transmission of the camera PC 210 drops from the previous value, a predetermined delay (for example, 20 ms) is inserted and the process proceeds to the transfer process in step S20 ( That is, delay time [ms] = (rank-3) * 20).

  With the above processing, when the ID of the mobile node 810 and the display instruction from the display PC 5 are set in the sensor information 2404 of the priority history table 240, the image (high definition image) received from the camera PC 210 is displayed. Although it is transferred to the request conversion apparatus 3 as it is, since the delay increases as the priority decreases, the frame rate of the image of the camera PC 210 decreases.

  That is, the storage device 4 of the present embodiment acquires a high-definition image frame by frame when requesting an image to one camera PC 210, so that the next image is returned after the high-definition image is returned. If the delay is increased, it takes time to acquire one image, and the frequency of image requests to the camera PC 210 stored in the storage device 4 decreases. As a result, the frame rate of the image from the camera PC 210 stored in the storage device 4 decreases.

  Also, the priority of the image of the camera 220 that constantly transmits a high priority is evaluated by evaluating the transmission priority based on the difference between the average of the priorities of the images of the camera 220 and the latest priority. Can be lowered relatively.

  As described above, in the present embodiment, since the image request is transferred via the transmission control device 20, the high-definition image that is a reply to the request also passes through the transmission control device 20. In this way, in order to transfer a high-definition image via the transmission control device 20, the image request from the image storage device 4 is routed through the request conversion device 3, and the request conversion device 3 converts the destination. Forward.

  The transmission control device 20 is a network device (for example, a switch or a router) provided with a processor, a memory, and a network interface, and at least one camera PC 210 is connected to the network device.

  The transmission control device 20 transfers the image request transferred from the request conversion device 3 to the camera PC 210, and controls transfer of image data, which is a response to the image request, based on the priority. This priority is determined based on selected camera information transmitted from the image display device 5 and priority camera information transmitted from the sensor information conversion device 7. By preferentially controlling the image data transferred by the transmission control device 20, it is difficult to transfer image data having a low priority. In the present embodiment, since the next image request is not transmitted unless the image data is transferred, the number of frames transferred per unit time of the image data having a low priority is lowered. Therefore, the frame rate of image data with a low priority can be reduced.

  In the present embodiment, the transmission control device 20 is installed on the monitoring target base side (that is, the camera 220 side), and the request conversion device 3 is installed on the monitoring center side that performs aggregate monitoring. The transmission control device 20 and the request conversion device 3 are connected by a network. In this way, the traffic transferred by the network 100 can be reduced by the cooperation of the transmission control device 20 and the request conversion device 3.

<Configuration of monitoring center>
Next, components of the monitoring center will be described.

  As described above, the image storage device 4 is a computer including a processor, a memory, a storage device, and a network interface, and stores image data captured by the camera 220 in the storage device.

  The sensor information conversion device 7 is a computer having a processor, a memory, and a communication interface, and converts information sent from the sensor network 8 into a format and a transmission procedure that can be interpreted by the transmission control device 20 and the image search device 6. Then, the converted message is transmitted to the transmission control device 20 and the image search device 6.

  The sensor information conversion apparatus 7 includes a sensor / camera management table indicating the correspondence between the identifier of the fixed node 820 and the identifier of the camera PC 210. The sensor information conversion apparatus 7 refers to this sensor-camera management table and identifies the identifier of the camera PC 210 corresponding to the node from the identifier of the fixed node 820. Thereby, for example, the IP address of the camera PC 210 connected to the camera 220 capable of photographing a person or an object passing near the fixed node 820 can be specified.

  The sensor information conversion apparatus 7 holds the position information of the mobile node 810 and updates the position information when detecting connection (approach) / release (detachment) between the radio base station 800 and the fixed node 820. The position information held in the sensor information conversion apparatus 7 may include a history of past position information in addition to the latest position information of the mobile node 810. The sensor information conversion apparatus 7 determines the transfer priority of the image captured by the camera 220 based on the position information of the mobile node 810. Further, the priority of image transfer of the camera corresponding to the exhibit is determined based on the calculated attention level of the exhibit.

  The image search device 6 is a computer including a processor, a memory, a storage device, and a network interface, and stores image feature amounts of image data captured by the camera 220 and low-definition image data (thumbnail images) in the storage device. Further, the sensor information received from the sensor information conversion device 7 is stored.

  The image search device 6 searches the feature amount of the image data stored in the image storage device 4 based on the search request from the image display device 5, and obtains the search results (image data identifier and low-definition image data). It returns to the image display device 5. A plurality of image search devices 6 may constitute a search server group.

  The request conversion device 3 is a computer including a processor, a memory, and a network interface, and is arranged on a logical communication path between the image storage device 4 and the camera PC 210. When relaying an image request transmitted from the image storage device 4 to the camera PC 210, the request conversion device 3 changes the message source and destination so as to pass through the transmission control device 20, and from the transmission control device 20. The transmission source and destination of the message destined for the image storage device 4 are changed.

  Specifically, the request conversion device 3 sets the destination (IP address of the camera PC 210) included in the image request transmitted from the image storage device 4 to the IP address and port number of the transmission control device 20 (IP address of the camera PC 210). The image request is converted to the corresponding port number and the transmission source is replaced with the request conversion device 3, and the image request is transmitted to the transmission control device 20. Further, the request conversion device 3 converts the destination of the high-definition image data returned from the transmission control device 20 into the image storage device 4, and the camera PC 210 that is the transmission source of the returned high-definition image data. The image data converted into the IP address is transmitted to the image storage device 4. Therefore, the request conversion device 3 includes an address conversion table 30 for converting the IP address and port number of the camera PC 210.

  The image display device 5 includes a processor, a memory, a network interface, an operation unit, and a display unit (monitor 50). The image display device 5 is a computer operated by an administrator of the video network system. The image of the camera 220 is displayed on the monitor 50 as a high-definition image. The operation unit 50 includes a display, a keyboard, a mouse, and the like.

  The image display device 5 preferentially displays an image from a camera determined to have a high priority based on detection information received via the image search device with high definition. Here, the detection information refers to information including the feature amount of an image including a specific feature (movement or face), its thumbnail image, and the camera ID from which the image was taken, or a specific mobile node 810. , The identifier of the fixed node 820 that specifies the position of the mobile node 810, and the camera ID of the camera 220 corresponding to the fixed node 820. For example, the information includes the camera ID of a camera corresponding to an exhibit with a high degree of attention. Also, the image display device 5 acquires the image captured by the camera 220 selected by the administrator through the operation of the operation unit from the image storage device 4, and displays the image captured by the selected camera 220. You may control to raise.

  The position information display terminal 9 is a computer including a processor, a memory, a communication interface, and a display unit. The position information display terminal 9 holds the positions (coordinates on the map) of the radio base station 800 and the fixed node 820, connects / releases the mobile node 810 and the radio base station 800, and is fixed to the mobile node 810. Information on connection / disconnection with the node 820 is received, and an icon corresponding to the mobile node is displayed at the position of the radio base station 800 or the fixed node 820. Thereby, the position information of the mobile node 810 can be visualized.

<Sensor network>
Next, the sensor network 8 will be described.

  The sensor network 8 includes a wireless base station 800 connected to the sensor information conversion apparatus 7 and nodes 810 and 820 connected to the wireless base station 800 via the wireless network.

  The nodes of this embodiment include a fixed node 820 whose position is known and a mobile node 810 that is attached to a person or an object.

  The fixed node 820 is a node that transmits a preset identifier from the infrared transmitter. The fixed node 820 includes an ID storage unit that stores a preset fixed node identifier and an infrared communication unit that transmits the identifier. The fixed node 820 may include a communication unit that communicates with the radio base station 800.

  The mobile node 810 includes an infrared communication unit that receives an identifier transmitted from the fixed node 820 via infrared communication, an ID storage unit that stores a preset identifier of the mobile node, and a fixed node 820 received by the infrared communication unit. A wireless communication unit that transmits the identifier to the wireless base station 800 is provided. Note that the radio communication unit transmits the identifier of the mobile node to the radio base station 800 together with the received identifier of the fixed node 820.

  When the mobile node 810 passes the vicinity of the fixed node 820, the infrared communication unit receives the identifier transmitted from the fixed node 820 by infrared communication, and the received identifier of the fixed node 820 and the identifier of the mobile node 810 are received by the radio base station 800. Send to. The radio base station 800 can notify the sensor information conversion apparatus 7 that the mobile node 810 has passed near the fixed node 820.

  Note that the fixed node 820 may have an infrared transmission / reception function and / or a wireless communication function. With the infrared transmission / reception function of the fixed node 820, the fixed node 820 and the mobile node 810 can transmit and receive identifiers to each other by infrared communication.

  Further, when the mobile node 810 detects an acceleration outside the predetermined range, the sensor information conversion apparatus 7 prioritizes transfer of an image captured by the camera 220 corresponding to the fixed node 820 with which the mobile node 810 is communicating. You can raise the degree. In this way, it is possible to detect suspicious behavior of the person carrying the mobile node 810.

<Camera and node placement>
FIGS. 17 and 18 show an arrangement example of the camera 220, the radio base station 800, and the fixed node 820 of this embodiment, FIG. 17 is an overall view thereof, and FIG. In FIG. 17, the camera 220 is omitted.

  Each room is provided with one radio base station 800, and the radio base station 800 performs radio communication with a mobile node 810 existing in a radio communicable range. A plurality of fixed nodes 820 are provided in each room, and each fixed node 820 performs infrared communication with a mobile node 810 that exists in the infrared communication range.

  For example, as shown in FIG. 17, when the mobile node 810 moves from the room 1 to the room 5, the mobile node 810 disconnects (releases the connection) with the radio base station 800 in the room 1, and the room 5 Communication (communication) with the wireless base station 800 is started.

  Also, as shown in FIG. 18, a plurality of cameras 220 are provided so that the communication range of the fixed node 820 is included in the shooting range. Each camera 220 and the fixed node 820 are associated with each other. In addition, a room overhead camera 221 is provided in the room. The room overhead camera 221 and the radio base station 800 are associated with each other. This association is recorded in a base station ID / camera ID correspondence table (see FIG. 15) held in the sensor information conversion apparatus 7.

  As shown in FIG. 17 and FIG. 18, since the wireless communication has a wide detection range, the position of the mobile node 810 can be grasped in a wide and coarse position unit such as a room unit. For this reason, according to wireless communication, the position of the mobile node 810 can be grasped at an early stage. On the other hand, since the infrared communication has a narrow detection range, the position of the mobile node 810 can be grasped in units of narrow and fine positions in the room. For this reason, according to infrared communication, the position of mobile node 810 can be grasped later than wireless communication.

  FIG. 15 shows a correspondence table 700 between the base station ID and the camera ID of this embodiment. As described above, the correspondence table 700 is held in the sensor information conversion device 7.

  The base station ID / camera ID correspondence table 700 includes an identifier 710 of the radio base station 800 and an identifier 720 of the camera 220, and the identifier 710 of the radio base station 800 and the identifier 720 of the camera 220 are recorded correspondingly.

  The identifier of the radio base station 800 is a unique identifier assigned to the radio base station 800 provided in the video network system of the present embodiment. Note that a unique identifier is also assigned to the fixed node 820 provided in the video network system of the present embodiment, and the correspondence table 700 also records the correspondence between the identifier of the fixed node 820 and the identifier 720 of the camera 220. Yes.

  The correspondence between the fixed node 820 and the camera 220 and the correspondence between the radio base station 800 and the camera 220 may not be a one-to-one correspondence. For example, a single fixed node 820 may be associated with a plurality of cameras 220 capturing a specific position.

<Mobile node status>
FIG. 13 is a state transition diagram of the mobile node 810 of this embodiment.

  The position of the mobile node 810 is managed by the sensor information conversion device 7. There are two states of the mobile node 810: “unknown” or “confirmed” in the two variables of room and position, and four types of states occur.

Transition between these states is caused by the following four events.
GW-IN: Mobile node 810 and radio base station 800 are connected.
GW-OUT: The connection between the mobile node 810 and the radio base station 800 is released.
IR-IN: Mobile node 810 and fixed node 820 are connected (mobile node 810 approaches fixed node 820).
IR-OUT: Connection between the mobile node 810 and the fixed node 820 is released (the mobile node 810 has moved away from the fixed node 820).

  Further, the four types of states of the mobile node 810 are defined as follows.

[State 1]
State 1 is a state of GW-OUT and IR-OUT, in which the room in which mobile node 810 exists is unknown and the position of mobile node 810 is also unknown. In state 1, the icon corresponding to mobile node 810 is not displayed. State 1 transitions from state 2 when an event “the connection between the mobile node and the radio base station is released” is received, and state 1 receives an event “the connection between the mobile node and the fixed node is released” Transition from state 4 to.

[State 2]
State 2 is a state of GW-IN and IR-OUT, and the room in which the mobile node 810 exists is fixed, but the position of the mobile node 810 in the room is unknown. In the state 2, an icon corresponding to the mobile node 810 is displayed at the center position of the room where the base station 8 connected to the mobile node 810 is installed.

  In state 2, the background color of the icon is not displayed. State 2 transitions from state 1 when an event “mobile node and radio base station is connected” is received, and state when it receives an event “connection between mobile node and fixed node is released” Transition from 3.

[State 3]
State 3 is a state of GW-IN and IR-IN, in which the room in which the mobile node 810 exists is determined, and the position of the mobile node 810 in the room is also determined. In state 3, an icon corresponding to mobile node 810 is displayed at a position where fixed node 820 connected to mobile node 810 is installed. At this time, the icon display position may be moved by animation of the icon of the moving node 810 (for example, a person represented by the icon walks).

  In the state 3, the icon of the mobile node 810 is displayed in the same background color as the background of the icon of the fixed node 820. State 3 transitions from state 2 when an event “mobile node and radio base station is connected” is received, and state 3 starts when state “mobile node and fixed node are connected” is received Transition.

[State 4]
State 4 is a state of GW-OUT and IR-IN, in which the room in which the mobile node 810 exists is unknown, but the position of the mobile node 810 is fixed. In state 4, an icon corresponding to mobile node 810 is displayed at a position where fixed node 820 connected to mobile node 810 is installed.

  In the state 4, the icon of the mobile node 810 is displayed in the same background color as the background of the icon of the fixed node 820. That is, when the state 3 changes to the state 4, the icon display is not changed. State 4 transitions from state 1 when an event “mobile node and radio base station is connected” is received, and state when it receives an event “mobile node and fixed node are disconnected” Transition from 3.

<Operation for grasping position from presence / absence of wireless communication>
Next, an operation for grasping the position of the mobile node 810 by wireless communication will be described.

  As shown in FIG. 18, room overhead camera 221 arranged in the room is associated with radio base station 800.

  The sensor information conversion device 7 detects that the mobile node 810 is connected to the radio base station 800 arranged for each room, and grasps the position of the mobile node 810. Further, the sensor information conversion apparatus 7 detects the position of the mobile node 810 detected (for example, the identifier of the room where the radio base station 800 to which the mobile node 810 is connected) and the position of the mobile node 810 corresponding to the position of the mobile node 810. Priority information including an identifier is generated. Then, the sensor information conversion device 7 transmits the generated priority information to the transmission control device 20 and the image search device 6.

  While connected to any one of the radio base stations 800, the mobile node 810 performs some data, for example, infrared observation shown in FIG. 14 (details will be described later) by wireless communication at a predetermined timing (for example, periodically). Send data. In this case, if the identifier of the fixed node has not been received by infrared communication, infrared observation data including only the identifier of the own mobile node is transmitted. When receiving the infrared observation data transmitted from the mobile node 810 by wireless communication, the wireless base station 800 transmits the received infrared observation data and the unique ID assigned to the wireless base station 800 to the sensor information conversion device 7. .

  The sensor information conversion apparatus 7 manages a flag indicating which radio base station 800 is connected to each mobile node 810 or which base station 8 is not connected. Specifically, when connected to any one of the radio base stations 800, the identifier of the connection-destination radio base station 800 is set in the flag. On the other hand, when not connected to any radio base station 800, “null” is set in the flag.

  Using the flag set in this way, the identifier of the mobile node 810 and the identifier of the radio base station 800 received from the radio base station 800, the following location information generation processing is performed.

  1) When the mobile node X is connected to the radio base station A and the connection destination flag of the mobile node X is “null”, the identifier of the radio base station A is set in the connection destination flag of the mobile node X, and “mobile node X Is connected to the wireless base station A ”information.

  2) When the connection destination flag of the mobile node X is “A” and the observation value of the mobile node X cannot be received from the radio base station A for a predetermined time (for example, 5 seconds), the connection destination flag of the mobile node X is set to “ “null” is generated, and “mobile node X has left the communication range of radio base station A” information is generated.

  3) When the flag of the mobile node X is “A” and the mobile node X is connected to the radio base station B, the identifier of the radio base station B is set in the connection destination flag of the mobile node X. The information “separated from the radio base station A” and the information “the mobile node X has connected to the radio base station B” are continuously generated.

  The generated connection information is transmitted to the transmission control device 20 and the image search device 6. The generated connection information includes at least a connection or disconnection time, an identifier of the mobile node 810, an identifier of the connected or disconnected radio base station 800, and an identifier of the room overhead camera 220 corresponding to the radio base station 800. . Alternatively, the identifiers of all the cameras in the corresponding room may be included.

<Operation to grasp position from infrared observation data>
As shown in FIG. 18, the fixed node 820 that transmits infrared rays is arranged in a pair with the camera 220.

  When the mobile node 810 receives the fixed node identifier transmitted from the fixed node 820, the mobile node 810 transmits data including the received fixed node identifier to the radio base station 800. That is, when the mobile node 810 receives an identifier from the new fixed node 820, the mobile node 810 includes the identifier of the new fixed node in the data transmitted to the radio base station.

  When the sensor information conversion apparatus 7 detects that the data transmitted from the mobile node 810 has changed so that a new reception node ID is included, the mobile node 810 (the person who holds the mobile node 810) is fixed. It detects that it came in front of the node 820 and grasps the position of the mobile node 810. Further, the sensor information conversion apparatus 7 generates priority information including the position information of the mobile node 810 and the identifier of the camera corresponding to the position of the mobile node 810, and the generated priority information is transmitted to the transmission control apparatus 20 and the image search. Transmit to device 6.

  More specifically, the fixed node 820 transmits the identifier assigned to the self node at a predetermined timing (for example, at a predetermined time interval such as 0.25 seconds) using infrared rays.

The mobile node 810 receives infrared light for a predetermined time (for example, 2 seconds), and transmits infrared observation data including the received identifier of the fixed node to the radio base station 800. FIG. 14 shows that the mobile node 810 of this embodiment is wireless. It is explanatory drawing which shows the format of the infrared observation data 600 transmitted by communication.

  The infrared observation data 600 includes the number of node IDs 630 received within the predetermined time, the received node ID 640, and the number of receptions 650 of each ID for 2 seconds. Further, the infrared observation data 600 includes a time 610 when the infrared observation data is wirelessly transmitted from the mobile node and an identifier 620 of the own node. If the fixed node identifier is not received within the predetermined time, the infrared observation data 600 includes only the transmission time 610 and the own node identifier 620.

  When receiving the infrared observation data 600 transmitted from the mobile node 810, the radio base station 800 transmits the received infrared observation data 600 to the sensor information conversion apparatus 7 together with the identifier of the own radio base station.

  When the sensor information conversion apparatus 7 receives the infrared observation data 600 transmitted from the radio base station 800, the sensor information conversion apparatus 7 extracts the identifier of the fixed node 820 with which the mobile node 810 is communicating from the received infrared observation data 600. Then, based on the extracted fixed node identifier, a communication destination flag indicating a communication state with the fixed node 820 provided for each mobile node 810 is set. Specifically, when connected to any fixed node 820, the identifier of the fixed node 820 that is the connection destination is set in the flag. On the other hand, if no fixed node 820 is connected, “null” is set in the flag.

  As described above, the sensor information conversion device 7 holds the correspondence table 700 (see FIG. 15) between the fixed node ID and the camera ID. In this embodiment, the fixed node ID / camera ID correspondence table is included in the base station ID / camera ID correspondence table 700, but separately from the base station ID / camera ID correspondence table 700, A correspondence table of fixed node IDs and camera IDs may be provided.

  When the mobile node 810 connects to or disconnects from the fixed node 820, the sensor information conversion apparatus 7 connects / disconnects message 900 including the connection / release time, the identifier of the mobile node, and the identifier of the camera (see FIG. 16). Is transmitted to the transmission control device 20 and the image search device 6.

  Note that if “connection to a fixed node” by infrared communication and “connection to a radio base station” by wireless communication arrive at the same time, “connection to a fixed node” has priority.

  FIG. 16 is an explanatory diagram showing the format of the connection / disconnection message 900 of this embodiment.

  The connection / disconnection message 900 includes a message length 910, a message type 920, a mobile node identifier 930, a fixed node identifier / wireless base station identifier 940, a camera identifier 950, and a time stamp 960. In the message type 920, a code corresponding to “connection notification” or “leaving notification” is set.

  When receiving the connection / disconnection message 900, the image search device 6 stores the received connection / disconnection message 900. The image search device 6 stores the mobile node identifier 930 and the camera identifier 950 in association with each other, so that an image in which the mobile node is specified (for example, an image showing Mr. A) can be searched. become.

  The image display device 5 determines the display priority based on the received camera identifier. When one fixed node 820 corresponds to a plurality of cameras 220 photographing a specific position, all the priorities of the plurality of cameras 220 corresponding to the fixed node 820 can be increased.

Further, as described above, when the fixed node 820 has an infrared transmission / reception function and / or a wireless communication function, the fixed node 820 and the mobile node 810 can transmit and receive identifiers to each other by infrared communication. Then, when the fixed node 820 receives the identifier of the mobile node 810, the fixed node 820 sends the infrared observation data including the received identifier of the mobile node to the sensor information conversion device 7 via the radio base station 800. In this way, even when wireless communication is unstable, the sensor information conversion device 7 recognizes the position of the mobile node if infrared observation data arrives from either the fixed node 820 or the mobile node 810. And reliability can be improved.
<Assumed application destination>
In the embodiment, the attention level evaluation for each exhibition company / institution, each exhibition, or each exhibition presenter in the exhibition has been described as an example. However, there may be other application destinations. For example, evaluation for each class (instructor) at a school or seminar, evaluation for each company at a joint employment briefing session, evaluation for each company presenter, each presentation (presenter), each poster, or poster explanation at the conference presentation venue Evaluation for each person, evaluation for each sales floor or salesperson in a store such as a department store or mass sales shop, evaluation for each vehicle type or salesperson in an automobile sales shop, and the like are also assumed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made, and it is possible to appropriately combine the above-described embodiments. It will be understood by the contractor.

1 is an example of a diagram illustrating a configuration of a sensor network system in Embodiment 1. FIG. 1 is an example of a block diagram illustrating a hardware configuration of a sensor terminal in Embodiment 1. FIG. FIG. 2 is an example of a block diagram illustrating a hardware configuration of a relay machine according to the first embodiment. 1 is an example of a block diagram illustrating a hardware configuration of a base station in Embodiment 1. FIG. 1 is an example of a block diagram illustrating a hardware configuration of a management server in Embodiment 1. FIG. 1 is an example of a configuration diagram of a table that stores sensor data in Embodiment 1. FIG. An example of the processing flow outline | summary which calculates | requires the meeting, operation | movement, remark, activeness, and attention degree in Example 1. An example of the detailed process flow figure of the determination method of the meeting in a management server in Example 1, operation | movement, activity level, a speech, and attention degree. An example of the relationship of the frequency contained in the operation | movement classified from the experimental result, action rhythm, and an operation pattern. An example of the attention degree visualization screen in the first embodiment. An example of the attention level feedback display to the exhibitor in Example 1. An example of the block diagram which shows the structure of the video network system in Example 2. FIG. FIG. 10 is an example of a state transition diagram of a mobile node in the second embodiment. An example of the explanatory view showing the format of the infrared observation data in Example 2. FIG. An example of the explanatory view which shows the correspondence table of base station ID and camera ID in Example 2. FIG. FIG. 10 is an example of an explanatory diagram illustrating a format of a connection / leaving message in the second embodiment. FIG. 6 is an overall view illustrating an arrangement example of a camera, a radio base station, and a fixed node according to a second embodiment. FIG. 6 is an enlarged view showing an arrangement example of a camera, a radio base station, and a fixed node in the second embodiment. FIG. 6 is a block diagram illustrating an example of a network video monitoring system according to a second embodiment. FIG. 10 is an explanatory diagram illustrating an example of a priority history table of a transmission control device according to a second embodiment. 9 is a flowchart illustrating an example of processing performed by a transmission control device according to the second embodiment.

Explanation of symbols

BS1, BS2 ... Base station device, WC1, WC2, WC3 ... Wireless communication, LAN1 ... Wired network, SV1 ... Management server, PC1, PC2 ... Computer, KE1 ... Keyboard, MO1 ... Mouse, CV1 ... Infrared communication, PH1 ... IP phone , DO1 ... Barcode / tag medium, RD2 ... Barcode / IC tag reading, RD1 ... Barcode / IC tag reader, CO1 ... Camera, MI1 ... Microphone, WKR1, WKR2 ... Exhibitor, SNS1 ... Voice sensing, SD1 ... Sensor data, SN0 ... sensor node, CPU0 ... processor circuit, RF0 ... wireless circuit, SNS0 ... sound / acceleration / temperature / infrared sensor, MS2 ... sensor device control program, MEM0 ... memory, IN0 ... button, OUT0 ... LCD / LED. Buzzer, MAILSV1 ... Lumpur management server, NTPS ... time management server, BC1, BC2 ... infrared signal transmitter, BIR1, BIR2 ... infrared signal

Claims (7)

An attention level measurement visualization system comprising a sensor node and a management server that processes data transmitted from the sensor node,
The sensor node is an infrared transmitter that emits a unique identifier using infrared rays, an acceleration sensor that acquires acceleration data, and an infrared transmitter provided in an evaluation object, or a face of a carrier of another sensor node An infrared sensor that acquires infrared data emitted by an infrared transmitter provided in another sensor node, and an information transmitter that transmits the acceleration data and the infrared data to the management server,
The management server includes an information receiving unit that receives the acceleration data and the infrared data, and an attention level measurement unit that calculates the attention level of the evaluation target based on the acceleration data and the infrared data. A system ,
The evaluation object is an evaluation object fixed in a specific area,
Corresponding to one of the evaluation objects, a camera that reflects the evaluation object is installed,
An attention level measurement system further comprising a display unit that preferentially displays an image of a camera that reflects an evaluation object that is determined to have a high level of attention by the attention level calculation unit. In the attention level measurement system according to claim 1,
The management server includes an evaluation target specifying unit that specifies an evaluation target that the carrier of the sensor node has faced from the infrared data, and a face-to-face of the carrier of the sensor node and a carrier of another sensor node from the infrared data. A face-to-face identification unit that detects information, an action identification unit that measures the activity level of the wearer of the sensor node from the acceleration data, and an activity level that calculates the activity level at the time of meeting based on the face-to-face information and the activity level And a degree evaluation unit,
The degree-of-attention calculation unit is a degree-of-interest measurement system that calculates the degree of attention of the identified evaluation target based on the degree of activity at the time of meeting. In the attention level measurement system according to claim 2,
The sensor node further includes an audio sensor that acquires audio data;
The management server further includes a speech identification unit that detects whether or not the sensor node carrier speaks from the audio data,
The activity level evaluation unit is an attention level measurement system that calculates the activity level during the meeting using the detection result of the statement identifying unit. In the attention level measurement system according to claim 3,
The utterance identification unit analyzes the utterance content of the carrier of the sensor node from the voice data,
The activity level evaluation unit is an attention level measurement system that calculates the activity level during the meeting based on the analysis result of the utterance content. In the attention level measurement system according to claim 1,
There are a plurality of the evaluation targets, and the attention level calculation unit calculates the attention level of each of the plurality of evaluation targets,
The management server further includes an attention level display unit,
The attention level display unit displays the attention levels of the plurality of evaluation targets in a tabular format based on the magnitude relationship of the values. In the attention level measurement system according to claim 1,
The sensor node holds time information, gives time to the acceleration data and infrared data,
The management server further includes an attention level display unit,
The attention level display unit refers to the given time, obtains a plurality of attention levels for each of the evaluation objects as a transition sequence of a predetermined time interval in a predetermined time zone, and one or a plurality of evaluation objects Attention level measurement system that displays the attention level of the user in the form of a line graph or a bar graph indicating the transition series. In the attention level measurement system according to claim 1,
The attention level measurement system has a plurality of sensor nodes worn by a plurality of wearers,
One of the plurality of mobile users is a person explaining the evaluation target,
Another one of the plurality of mobile users is an attention level measuring system which is a person who receives an explanation of the evaluation object.

Images