JP2012039566A - Sensor data collection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system that collects data from a plurality of terminals having sensors and a plurality of infrared transceivers, which is capable of self-diagnosis by optical loopback while suppressing mutual interference between transmission circuits and reception circuits in the infrared transceivers of the terminals.SOLUTION: Switches IRTSW, IRRSW are provided to selectively turn on and off each of transmission circuits and reception circuits of a plurality of infrared transceivers TRIR mounted on terminals TR. The switches IRTSW, IRRSW receive data transmitted from one infrared transmission circuit TRIR1 with other TRIR2-TRIR4 through reflection from a surrounding environment by controlling a microcomputer MCU including a processing part CPU to suppress interference and to constitute an optical loopback, thus implementing a self-diagnosis.

Description

  The present invention relates to a business microscope system that acquires face-to-face communication data between persons and visualizes and diagnoses the state of an organization, and more particularly to a sensor data collection system that collects data from a terminal such as a sensor node.

  Improving productivity is an essential issue in every organization, and many trials and errors have been made to improve the work environment and streamline operations. When the assembly or transportation such as a factory is limited to an organization that handles business, the result can be objectively analyzed by tracing the movement path of the part or product. However, for white-collar organizations that perform knowledge labor such as office work, sales, and planning, things cannot be evaluated by observing things because they are not directly linked to work. The reason for forming an organization in the first place is to achieve large-scale work that cannot be done by an individual by combining multiple people. For this reason, decisions and agreements are always made by two or more persons in any organization. This decision-making and agreement can be considered to be influenced by the relationship between persons, and as a result, the success or failure is considered to determine productivity. Here, the relationship may be labeled as a boss, a subordinate, or a friend, for example, and may include various feelings about each other such as favor, dislike, trust, or influence. Communication, in other words communication, is indispensable for people to have a relationship. For this reason, it is considered that the relationship can be examined by acquiring a record of communication.

  One method for detecting communication between people is to use a system that attaches a terminal equipped with a sensor to a person, an object, or a place, and collects information about the sensor. The physical quantity acquired by the sensor to detect this communication includes infrared rays for detecting the face-to-face state, voice for detecting speech and environment, and acceleration for detecting human movement. The physical quantity collected at the terminal needs to be collected for batch analysis. For this purpose, sensor network technology that communicates wirelessly and data that has been temporarily stored in the nonvolatile memory in the terminal are collected later. There are methods such as collecting data wirelessly or prioritized.

  A business microscope system is a system for detecting the movement of a person and communication between people from the physical quantities obtained by these sensors and visualizing the state of the organization to help improve the organization. In a business microscope system, a terminal used for detecting communication between people is a name tag type sensor node.

The name tag type sensor node in this business microscope includes an acceleration sensor for detecting a wearer's movement feature, a microphone for detecting a voice feature, a temperature sensor and an illuminance sensor for detecting environmental temperature and brightness. Is provided. Furthermore, in order to detect a person-to-person meeting, an infrared transceiver is provided. This infrared transmitter / receiver periodically transmits a unique ID and transmits / receives the unique ID between the terminals, thereby detecting when and when a person meets. In addition, when people communicate with each other, there are various positional relationships, such as the person sitting on the seat and the person standing, and infrared rays with different angles are used to detect this. It is characterized by having a plurality of transceivers (see Patent Document 1).
In order to determine the failure of a circuit that performs transmission / reception such as a transceiver, there is a loopback method as a conventional technique. Loopback uses the transmitter circuit and receiver circuit of the terminal to receive data transmitted from the transmitter circuit again using its own receiver circuit, and checks the match between the transmitted data and the received data. Thus, it is a technique for simultaneously determining the abnormality of the transmission circuit and the reception circuit.

  For example, Patent Document 2 uses a configuration of diversity (a technology for preparing a plurality of receiving antennas and selecting and receiving the most sensitive antenna) to form a pair of transmission and reception loops for transmission / reception. Shows how to do. In Patent Document 3, although there is no transmission circuit as a system, there is a technique for making a diagnosis by using a part of a plurality of reception circuits (oscillators) and inputting a test signal to another reception circuit. It is shown. Patent Document 4 discloses a technique that enables a diagnosis on the standby side in an operating state by switching between a main antenna and a backup antenna in a device including a plurality of identically configured wireless transceivers as a backup system.

JP 2008-301071 A Japanese Patent Laid-Open No. 08-274727 Japanese Patent Laid-Open No. 2003-004836 JP 2003-115805 A

In the business microscope system described above, the physical quantity acquired by the sensor is important for analyzing the communication between people because the time when the event occurs and the relationship between the physical quantities and the relation between the physical quantities acquired by different sensors are important. Meaningful. Therefore, if data is missing, accurate face-to-face communication analysis becomes impossible. Therefore, it is essential to continuously acquire data during the wearing time.
In general, there are three main causes for missing data acquired by a terminal equipped with a sensor. One is due to the power supply. When the battery is exhausted and the battery is replaced, the power supply is cut off and the physical quantity cannot be acquired or communicated by the sensor. The second is a communication problem. The distance at which wireless communication is possible is limited, and communication cannot be performed when the distance between terminals and base stations is more than a certain distance. In addition, the communicable distance is shortened due to a noisy environment or obstacles on the communication path. The third is due to the failure of data collection systems including terminals. When a failure occurs in a function such as data processing or communication, the data collection itself does not function, and it is possible to know that some abnormality has occurred in the system because the collected data does not exist. However, some sensors may acquire some incorrect data even if a failure or abnormality occurs, and it is difficult to determine an abnormality only by the presence or absence of data.

  In addition, infrared transmitters (infrared beacons) placed in the field have a battery life of several months, but until now there was no easy way to determine battery consumption and record when a battery was replaced before. In other words, there was only a means of predicting battery consumption and relying on human hands to replace batteries proactively.

  In order to analyze the organization's communication more accurately, it is essential to collect data in a wider range. This is because communication between people in the organization of the assumed knowledge labor site is important not only within the organization, but also between other departments or with external customers and experts.

  Therefore, business microscopes are expected to operate in excess of 1,000 units in one workplace. It is difficult to manually check for failures of terminals widely disposed in the environment or dead batteries. Therefore, finding a hardware failure is limited to a method in which the wearer himself / herself notices an abnormality and makes a report or discovers it as a data abnormality.

  When the wearer finds an abnormality, it uses a method that relies on human resources, such as a failure that does not cause a major abnormality in the outer shape such as a sensor error, or if only one of the multiple sensors is broken. It is very difficult. However, if a hardware failure cannot be detected promptly, the analysis is performed based on erroneous data, thereby impairing the reliability of acquired data. In particular, even if one of a plurality of infrared transmitters / receivers is malfunctioning, face-to-face information may be acquired by the remaining infrared transmitter / receiver, and it is difficult to detect as missing data.

  Patent Documents 2 to 4 described above disclose diagnostic techniques for a transmission / reception circuit of a wireless communication device, and enable both of the transmission / reception circuits to be diagnosed by loopback. If this can be applied to infrared rays, the infrared transmission / reception circuit can be diagnosed efficiently. Specifically, it is possible to diagnose that the infrared transmission / reception function is operating normally by receiving the data emitted by itself again by its own light receiving circuit and judging the consistency of the data.

  However, when the infrared communication is optically looped back, there is a problem of mutual interference between the transmission circuit and the reception circuit. In general, infrared communication is performed by causing an infrared light emitting diode to emit light in a short pulse shape. Since a large current of 100 mA or more flows at the timing of light emission, it affects a receiving circuit arranged in the vicinity. In particular, in a component in which a transmission / reception circuit is integrated, a circuit for suppressing reception is mounted so as not to receive light at the timing of light emission. Therefore, the infrared transmission / reception circuit cannot perform a loopback for self-diagnosis of its own transmission / reception circuit.

  An object of the present invention is to enable self-diagnosis by optical loopback of infrared transceivers of a large number of terminals arranged in an environment in a system for collecting data from a plurality of terminals equipped with sensors and infrared transceivers. It is.

  That is, an object of the present invention is to provide a sensor data collection system that collects data from a plurality of terminals having an infrared transceiver capable of self-diagnosis with a sensor.

  In order to achieve the above object, in the present invention, a sensor data collection system comprising a plurality of terminals equipped with sensors and a server collecting data from the terminals, the terminals comprising an infrared transmitter and an infrared receiver And a self-diagnosis unit that selectively turns on / off each of the infrared transmitter and the infrared receiver. The self-diagnosis unit receives data transmitted by the infrared transmitter of one module. Provided is a sensor data collection system configured to control self-diagnosis of an infrared transmitter and an infrared receiver when received by an infrared receiver of another module.

  In order to achieve the above object, in the present invention, a sensor data collection system including a plurality of terminals provided with sensors and a server that collects data from the terminals, each of the terminals includes an infrared transceiver. A sensor data collection system configured to detect abnormalities occurring in the system based on the collected data is provided.

  Furthermore, in order to achieve the above object, in the present invention, there is provided a sensor data collection system comprising a plurality of terminals equipped with sensors and a server that collects data from the terminals. The server provides a data collection system configured to diagnose the integrity of the data by the number of received data and detect anomalies in the system collecting the data.

  Furthermore, in a preferred aspect of the present invention, there is provided means capable of selectively turning on / off a plurality of infrared transmitter / receiver transmission circuits provided in the terminal for self-diagnosis of the infrared transmitter / receiver. As a result, data transmitted by one infrared transmission circuit is received by another infrared reception circuit due to reflection from the environment, thereby forming an optical loopback. At this time, if different circuits are used for the transmitting infrared transmission circuit and the receiving infrared receiving circuit, mutual interference between transmission and reception can be minimized. This is possible only when the terminal is provided with a plurality of combinations of transceivers. By repeatedly executing while changing the transmitting circuit and the receiving circuit to be turned on, self-diagnosis can be performed for all infrared transmission / reception circuits provided in the terminal.

  While suppressing the mutual interference of the infrared transmitter / receiver, self-diagnosis by loopback of the infrared transmitter / receiver circuit is enabled, and the failure of the terminal can be detected at an early stage. Thereby, the self-diagnosis of a system is enabled and the reliability of the acquired data can be improved.

It is a figure which shows the whole structure of the sensor data collection system of a 1st Example, and the detailed structure of a name tag type | mold sensor node (TR). It is a detailed block diagram of the base station (GW) of the sensor data collection system of a 1st Example. It is a detailed block diagram of the sensor network server (SS) of the sensor data collection system of a 1st Example. It is a detailed block diagram of the application server (AS) of the sensor data collection system of a 1st Example. It is a detailed block diagram of the diagnostic server (DS) of the sensor data collection system of a 1st Example. It is a detailed block diagram of the client (CL) of the sensor data collection system of a 1st Example. It is a detailed block diagram of the management system (AM) of the sensor data collection system of a 1st Example. It is an external view which shows an example of the structure of the name tag type | mold sensor node based on 1st Example. It is a figure which shows an example of the specific hardware constitutions of the name tag type | mold sensor node based on 1st Example. It is a figure which shows one specific example of the hardware constitutions of the cradle based on a 1st Example. It is a figure which shows one structure of the stationary infrared transmitter which concerns on a 1st Example. It is a figure which shows the internal structure of the infrared transmission / reception part based on a 1st Example. It is a figure which shows one structure of the optical feedback of the infrared rays transmission / reception part based on a 1st Example. It is a figure which shows the other structure of the optical feedback of the infrared rays transmission / reception part based on a 1st Example. It is a figure explaining the example of the combination of transmission and reception at the time of diagnosis based on a 1st Example. It is a figure explaining an example which performs a self-diagnosis in the state with which it attached to the cradle based on a 1st example. It is a figure explaining the other example which performs a self-diagnosis in the state with which it mounted | wore with the cradle based on a 1st Example. It is a figure which shows an example of the time chart which the name tag type | mold sensor node based on 1st Example transmits / receives data using radio | wireless communication. It is a figure which shows the other example of the time chart based on a 1st Example in which the name tag type | mold sensor node transmits data by wire at the time of charge using a cradle. It is a figure which shows the other example of the time chart of the heartbeat operation | movement of a name tag type | mold sensor node and a cradle based on 1st Example. It is a figure which shows an example of the flowchart of the heartbeat transmission of the name tag type | mold sensor node based on 1st Example. It is a figure which shows an example of the flowchart of the heartbeat transmission of the name tag type | mold sensor node based on 1st Example. It is a figure which shows an example of the flowchart of the heartbeat transmission of the name tag type | mold sensor node based on 1st Example. It is a figure which shows an example of the diagnostic result displayed on the management system based on 1st Example. It is a figure which shows the other example of the diagnostic result displayed on the management system based on 1st Example. It is a figure which shows the other example of the diagnostic result displayed on the management system based on 1st Example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As a first embodiment, a data collection system applied to a business microscope system using a plurality of sensor nodes will be described.
<Description of business microscope system>
In order to clarify the position and function of the sensor node in the present embodiment, a business microscope system will be described first. Here, a business microscope is a sensor node that is attached to a person, observes the situation of the person, and illustrates the relationship between persons and the current organization's evaluation (performance) as organizational activities to help improve the organization. System.

  Further, data related to face-to-face detection, behavior, voice, and the like acquired by the sensor node is generically referred to as organizational dynamics data.

  FIG. 1A, FIG. 1B, FIG. 1C, FIG. 1D, FIG. 1E, FIG. 1F, and FIG. 1G are explanatory diagrams showing components of a business microscope system according to one embodiment, and are divided for convenience of illustration. However, the processes shown in the drawings are executed in cooperation with each other.

  FIG. 1 shows a sensor network server (SS) for storing organization dynamics data, an application server (AS) for analyzing organization dynamics data, and a viewer from a name tag type sensor node (TR) via a base station (GW). A series of flow up to a client (CL) that outputs an analysis result is shown.

  This system consists of a name tag type sensor node (TR), a base station (GW), a sensor network server (SS), an application server (AS), a diagnostic server (DS), a client (CL), and a management system (AM). ing. Here, the base station, various servers, clients, and the management system each have a normal computer configuration including a central processing unit, a storage unit, a network interface, and the like. Note that in this specification, devices higher than the sensor network server (SS) may be collectively referred to as a server.

FIG. 1A shows a functional configuration of a name tag type sensor node (TR) which is an embodiment of a sensor node, and the name tag type sensor node TR has a plurality of infrared transmission / reception units (AB) for detecting a human facing situation. , A triaxial acceleration sensor (AC) for detecting the wearer's movement, a microphone (AD) for detecting the wearer's speech and surrounding sounds, and an illuminance sensor (LS1F) for detecting the front and back of the name tag type sensor node , LS1B) and various sensors such as a temperature sensor (AE). The sensor to be mounted is an example, and other sensors may be used to detect the face-to-face condition and movement of the wearer.
A name tag type sensor node of a business microscope is characterized by mounting a plurality of infrared transmission / reception circuits in order to reliably acquire a person regardless of the positional relationship between persons. In this figure, two infrared transmission / reception units are described. The infrared transmission / reception unit (AB) continues to periodically transmit terminal information (TRMT), which is unique identification information of the name tag type sensor node TR, in the front direction. When a person wearing another name tag type sensor node TR is positioned substantially in front (for example, front or oblique front), the name tag type sensor node TR and the other name tag type sensor node TR have their respective terminal information (TRMT). Communicate with each other via infrared. In this way, it is possible to record who is facing who.

  Each infrared transmission / reception unit is generally composed of a module in which an infrared light emitting diode for infrared transmission and an infrared phototransistor are combined. The infrared ID transmitter (IRID) generates terminal information TRMT that is its own ID and transfers it to the infrared light emitting diode of the infrared transmission / reception module. In the present embodiment, at the time of data transmission, the same data is transmitted to a plurality of infrared transmission / reception modules so that all infrared light emitting diodes are turned on simultaneously. Of course, independent data may be output at different timings.

  The data received by the infrared phototransistor of the infrared transmission / reception unit AB is ORed by an OR circuit (IROR). That is, if the ID is received by at least one of the infrared light receiving sections, the name tag type sensor node recognizes the ID. Of course, a configuration having a plurality of ID receiving circuits independently may be employed. In this case, since the transmission / reception state can be grasped with respect to each infrared transmission / reception module, it is also possible to obtain additional information, for example, in which direction the other name tag type sensor node facing each other is.

  The self-diagnosis unit (SDG) detects that a name tag type sensor node is mounted on the cradle (CRD), for example, and performs self-diagnosis. As will be described in detail later, the self-diagnosis unit SDG generates a transmission enable signal IRTE and a reception enable signal IRRE according to a preset sequence in order to detect a failure with a plurality of infrared loop packs. It has a mechanism that can individually control on / off of the infrared module. In this embodiment, the data transmitted by the transmission circuit of one infrared transceiver module is received by the reception circuit of another infrared transceiver module, so that the interference between the transmission circuit and the reception circuit is minimized, and the loop Function diagnosis by back can be performed.

  The sensor data (SENSD) detected by the sensor is stored in the storage unit (STRG) by the sensor data storage control unit (SDCNT). The sensor data (SENSD) is processed into a transmission packet by the communication control unit (TRCC) and transmitted to the base station (GW) by the transmission / reception unit (TRSR).

  At this time, the communication timing control unit (TRTMG) generates sensor data (SENSD) from the storage unit (STRG) and generates a wireless transmission timing. The communication timing control unit (TRTMG) has a plurality of time bases for generating a plurality of timings.

  In addition to the sensor data (SENSD) currently detected by the sensor, the data stored in the storage unit includes update data that has been accumulated in the past (CMBD) and firmware that is an operation program for the name tag type sensor node. There is firmware update data (FMUD).

  The name tag type sensor node TR of the present embodiment detects an external power supply (EPOW) connected by an external power supply connection detection circuit (PDET), and generates an external power supply detection signal (PDETS). The time base switching unit (TMGSEL) that switches the transmission timing generated by the communication timing control unit (TRTMG) or the data switching unit (TRDSEL) that switches the data to be wirelessly communicated by the external power supply detection signal (PDETS) It is a unique configuration. In FIG. 1A, as an example, the transmission timing is switched between two time bases of time base 1 (TB1) and time base (TB2) by a time base switching unit (TMGSEL) by an external power supply detection signal (PDETS). The data switching unit (SENSD) obtained from the sensor, the collective gift data (CMBD) accumulated in the past, and the firmware update data (FMUD) are used as the data to be communicated by the external power detection signal (PDETS). 2 shows a configuration in which (TRDSEL) switches.

  The illuminance sensors LS1F and LS1B are mounted on the front surface and the back surface of the name tag type sensor node TR, respectively. The data acquired by the illuminance sensors LS1F and LS1B is stored in the storage unit (STRG) by the sensor data storage control unit (SDCNT), and at the same time is compared by turning over detection (FBDET). When the name tag is correctly mounted, the illuminance sensor (front) (LS1F) mounted on the front surface receives extraneous light, and the illuminance sensor (back) (LS1B) mounted on the back surface is the name tag type sensor node. Since the positional relationship is sandwiched between the main body and the wearer, no extraneous light is received. At this time, the illuminance detected by the illuminance sensor (front) LS1F takes a larger value than the illuminance detected by the illuminance sensor (back) LS1B. On the other hand, when the name tag type sensor node TR is turned over, the illuminance sensor (front) LS1B receives the extraneous light, and the illuminance sensor (front) LS1F faces the wearer, so that it is detected by the illuminance sensor (front) LS1F. The illuminance detected by the illuminance sensor (back) LS1B is greater than the illuminance.

  Here, by comparing the illuminance detected by the illuminance sensor (front) LS1F with the illuminance detected by the illuminance sensor (back) LS1B by turning over detection (FBDET), the name tag node is turned over and not correctly mounted. Can be detected. When turning over is detected by turning over detection (FBDET), a warning sound is generated by the speaker SP to notify the wearer.

  The microphone AD acquires audio information. The surrounding information such as “noisy” or “quiet” can be known from the sound information. Furthermore, by acquiring and analyzing the voices of people, whether communication is active or stagnant, whether they are communicating with each other equally or unilaterally, whether they are angry or laughing, Etc. can be analyzed. Furthermore, the face-to-face state in which the infrared transmitter / receiver AB cannot be detected due to the standing position of the person or the like can be supplemented by voice information and acceleration information.

  The voice acquired by the microphone AD acquires both a voice waveform and a signal obtained by integrating the voice waveform by an integration circuit (AVG). The integrated signal represents the energy of the acquired speech.

  The triaxial acceleration sensor (ACC) detects the acceleration of the node, that is, the movement of the node. Therefore, it is possible to analyze the intensity of movement of a person wearing the name tag type sensor node TR and behavior such as walking from the acceleration data. Furthermore, by comparing the acceleration values detected by a plurality of name tag type sensor nodes TR, it is possible to analyze the activity of communication between the persons wearing the name tag type sensor nodes TR, the mutual rhythm, the mutual correlation, and the like. .

  In the name tag type sensor node TR of the present embodiment, the data acquired by the three-axis acceleration sensor ACC is stored in the storage unit (STRG) by the sensor data storage control unit (SDCNT) and at the same time by the vertical detection (UDDET). Detect the direction of the name tag. This utilizes the fact that two types of acceleration detected by the three-axis acceleration sensor ACC are observed: a dynamic acceleration change due to the wearer's movement and a static acceleration due to the gravitational acceleration of the earth.

  When the name tag type sensor node TR is worn on the chest, the display device (LCDD) displays personal information such as the affiliation and name of the wearer. In other words, it behaves as a name tag. On the other hand, when the wearer holds the name tag type sensor node TR in his / her hand and points the display device LCDD toward the user, the turn of the name tag type sensor node TR is reversed. At this time, the content displayed on the display device LCDD and the function of the button are switched by the vertical detection signal (UDDETS) generated by the vertical detection (UDDET). In the present embodiment, information to be displayed on the display device LCDD according to the value of the up / down detection signal (UDDETS), the analysis result by the infrared activity analysis (ANA) generated by the display control (DISP), the name tag display (DNM), The example which switches is shown.

  Whether or not the name tag type sensor node TR has faced another name tag type sensor node TR by exchanging infrared rays between the nodes by the infrared transmitter / receiver AB, that is, the person wearing the name tag type sensor node TR has another name tag It is detected whether or not the person wearing the type sensor node TR is faced. For this reason, it is desirable that the name tag type sensor node TR is mounted on the front part of the person. As described above, the name tag type sensor node TR further includes a sensor such as a triaxial acceleration sensor ACC. The sensing process in the name tag type sensor node TR corresponds to the organization dynamics data acquisition (A) in FIG. 2A.

  In many cases, there are a plurality of name tag type sensor nodes TR, each of which is connected to a nearby base station GW to form a personal area network (PAN).

  The temperature sensor (AE) of the name tag type sensor node TR acquires the temperature of the place where the name tag type sensor node TR is located, and the illuminance sensor (table) LS1F acquires the illuminance such as the front direction of the name tag type sensor node TR. As a result, the surrounding environment can be recorded. For example, it is possible to know that the name tag type sensor node TR has moved from one place to another based on temperature and illuminance.

  As input / output devices corresponding to the worn person, buttons 1 to 3 (BTN1 to 3), a display device LCDD, a speaker (SP), and the like are provided.

  The storage unit (STRG) is specifically composed of a nonvolatile storage device such as a hard disk or a flash memory, and includes terminal information (TRMT) that is a unique identification number of the name tag type sensor node TR, a sensing interval, and a display to the display. Operation settings (TRMA) such as output contents are recorded. In addition, the storage unit (STRG) can temporarily record data and is used to record sensed data.

  The communication timing control unit (TRTMG) is a clock that holds time information (GWCSD) and updates the time information (GWCSD) at regular intervals. The time information periodically corrects the time based on the time information (GWCSD) transmitted from the base station GW to prevent the time information (GWCSD) from deviating from other name tag type sensor nodes TR.

  The sensor data storage control unit (SDCNT) controls the sensing interval of each sensor according to the operation setting (TRMA) recorded in the storage unit (STRG), and manages the acquired data.

  Time synchronization acquires time information from the base station GW and corrects the clock. Time synchronization may be executed immediately after an associate described later, or may be executed according to a time synchronization command transmitted from the base station GW.

  When transmitting and receiving data, the radio communication control unit (TRCC) controls the transmission interval and converts it into a data format compatible with transmission and reception. If necessary, the wireless communication control unit (TRCC) may have a wired communication function instead of wireless communication. The radio communication controller (TRCC) may perform congestion control so that the transmission timing does not overlap with other name tag type sensor nodes TR.

  The associate (TRTA) transmits / receives an associate request (TRTAQ) and an associate response (TRTAQ) to form a personal area network PAN with the base station GW shown in FIG. 1B, and transmits a base station (GW) to which data is to be transmitted. decide. Associate (TRTA) is executed when the power of the name tag type sensor node TR is turned on and when transmission / reception with the base station GW is interrupted as a result of the movement of the name tag type sensor node TR. As a result of the association (TRTA), the name tag type sensor node TR is associated with one base station GW that is in a near range where a radio signal from the name tag type sensor node TR reaches.

  The transmission / reception unit (TRSR) includes an antenna and transmits and receives radio signals. If necessary, the transmission / reception unit (TRSR) can perform transmission / reception using a connector for wired communication. Transmission / reception data (TRSRD) transmitted / received by the transmission / reception unit (TRSR) is transferred to / from the base station GW via a personal area network (PAN).

  The base station GW shown in FIG. 1B has a role of mediating between the name tag type sensor node TR shown in FIG. 1A and the sensor network server SS shown in FIG. 1C. A plurality of base stations GW are arranged so as to cover areas such as living rooms and workplaces in consideration of the wireless reach. The base station GW includes a transmission / reception unit (GWSR), a storage unit (GWME), a clock (GWCK), and a control unit (GWCO).

  The transceiver unit (GWSR) receives radio from the name tag type sensor node TR and performs wired or radio transmission to the base station GW. Furthermore, the transmission / reception unit (GWSR) includes an antenna for receiving radio waves.

  The storage unit (GWME) is configured by a nonvolatile storage device such as a hard disk or a flash memory. The storage unit (GWME) stores at least operation setting (GWMA), data format information (GWMF), terminal management table (GWTT), and base station information (GWMG). The operation setting (GWMA) includes information indicating an operation method of the base station (GW). The data format information (GWMF) includes information indicating a data format for communication and information necessary for tagging the sensing data. The terminal management table (GWTT) includes terminal information (TRMT) of subordinate name tag type sensor nodes TR that can be currently associated, and local IDs distributed to manage those name tag type sensor nodes TR. The base station information (GWMG) includes information such as the address of the base station GW itself. Further, the storage unit (GWME) temporarily stores the updated terminal firmware (GWTF) of the name tag type sensor node.

  The storage unit (GWME) may further store a program executed by a central processing unit CPU (not shown) in the control unit (GWCO).

  The clock (GWCK) holds time information. The time information is updated at regular intervals. Specifically, the time information of the clock (GWCK) is corrected by time information acquired from an NTP (NETWORK TIME PROTOCOL) server (TS) at regular intervals.

  The control unit (GWCO) includes a CPU (not shown). By executing a program stored in the storage unit (GWME) by the CPU, sensing data sensor information acquisition timing, sensing data processing, transmission / reception timing to the name tag type sensor node TR and sensor network server SS, and Manage the timing of time synchronization. Specifically, when the CPU executes a program stored in the storage unit (GWME), the communication control unit (GWCC), associate (GWTA), time synchronization management (GWCD), time synchronization (GWCS), etc. Execute the process.

  The communication control unit (GWCC) controls the timing of communication with the name tag type sensor node TR and the sensor network server SS by wireless or wired. Further, the communication control unit (GWCC) distinguishes the type of received data. Specifically, the communication control unit (GWCC) identifies from the header portion of the data whether the received data is general sensing data, data for association, or a time synchronization response. And pass these data to the appropriate functions.

  The communication control unit (GWCC) refers to the data format information (GWMF) recorded in the storage unit (GWME), converts the data into a format suitable for transmission / reception, and indicates the type of data Data format conversion (GWMF) to which tag information is added is executed.

  The associate (GWTA) transmits a response (TRTAR) to the associate request (TRTAQ) sent from the name tag type sensor node TR, and transmits a local ID assigned to the name tag type sensor node (TR). If the associate is established, the associate (GWTA) corrects the terminal management information using the terminal management table (GWTT) and the terminal firmware (GWTF).

  Time synchronization management (GWCD) controls the interval and timing for executing time synchronization, and issues a command to synchronize time. Alternatively, the sensor network server SS, which will be described later, executes time synchronization management (GWCD), so that the command may be sent from the sensor network server SS to the base station GW of the entire system.

  Time synchronization (GWCS) connects to an NTP server TS on the network, and requests and acquires time information. Time synchronization (GWCS) corrects the clock (GWCK) based on the acquired time information. Then, time synchronization (GWCS) transmits a time synchronization command and time information (GWCSD) to the name tag type sensor node TR.

  The sensor network server SS shown in FIG. 1C manages data collected from the name tag type sensor node TR shown in FIG. 1A. Specifically, the sensor network server SS stores data sent from the base station GW shown in FIG. 1B in a database, and responds to requests from the application server AS shown in FIG. 1D and the client CL shown in FIG. 1F. Send sensing data based on. Further, the sensor network server SS receives a control command from the base station GW, and returns a result obtained from the control command to the base station GW.

  The sensor network server SS includes a transmission / reception unit (SSSR), a storage unit (SSME), and a control unit (SSCO). When time synchronization management (GWCD) is executed in the sensor network server SS, the sensor network server SS also requires a clock.

  The transmission / reception unit (SSSR) transmits and receives data among the base station GW, the application server AS, and the client CL. Specifically, the transmission / reception unit (SSSR) receives the sensing data transmitted from the base station GW and transmits the sensing data to the application server AS or the client CL.

  The storage unit (SSME) is configured by a nonvolatile storage device such as a hard disk or a flash memory, and at least a data table (BA), a performance table (BB), data format information (SSMF), a terminal management table (SSTT), and a terminal Firmware (SSTF) is stored. Further, the storage unit (SSME) may store a program executed by a CPU (not shown) of the control unit (SSCO).

  The data table (BA) includes organization dynamics data acquired by the name tag type sensor node TR, information on the name tag type sensor node TR, information on the base station GW through which the organization dynamics data transmitted from the name tag type sensor node TR has passed, and the like. It is a database for recording. A column is created for each data element such as acceleration and temperature, and the data is managed. A table may be created for each data element. In either case, all data is stored in the organization dynamics data collection (B) by associating the terminal information (TRMT), which is the ID of the acquired name tag type sensor node TR, with information about the acquired time. The

  The performance table (BB) is a database for recording an evaluation (performance) about an organization or an individual inputted from the name tag type sensor node TR or existing data together with time data.

  In the data format information (SSMF), a data format for communication, a method of separating sensing data tagged with a base station (GW) and recording it in a database, a method for responding to a data request, and the like are recorded. Yes. As will be described later, this data format information (SSMF) is always referred to by the communication control unit (SSCC) after data reception and before data transmission, and data format information (SSMF) and data management (SSDA) are Done.

  The terminal management table (SSTT) is a table that records which name tag type sensor node TR is currently managed by which base station (GW). When a name tag type sensor node TR is newly added under the management of the base station (GW), the terminal management table (SSTT) is updated.

  The terminal firmware (SSTF) temporarily stores the updated terminal firmware (GWTF) of the name tag type sensor node stored in the terminal firmware registration unit (TFI).

  The control unit (SSCO) includes a central processing unit CPU (not shown) and controls transmission / reception of sensing data and recording / retrieving to / from a database. Specifically, the CPU executes a program stored in the storage unit (SSME) to execute processing such as communication control (SSCC), terminal management information correction (SSTM), and data management (SSDA).

  The communication control unit (SSCC) controls the timing of communication with the base station GW, the application server AS, and the client CL by wire or wireless. Further, as described above, the communication control unit (SSCC) determines the data format in the sensor network server SS based on the data format information (SSMF) recorded in the storage unit (SSME). Alternatively, the data is converted into a data format specialized for each communication partner. Furthermore, communication control (SSCC) reads the header part which shows the kind of data, and distributes data to a corresponding process part. Specifically, received data is distributed to data management (SSDA), and a command for correcting terminal management information is distributed to terminal management information correction (SSTM). The destination of data to be transmitted is determined by the base station GW, the application server AS, or the client CL.

  The terminal management information modification (SSTM) updates the terminal management table (SSTT) when receiving a command for modifying the terminal management information from the base station GW.

  Data management (SSDA) manages correction / acquisition and addition of data in the storage unit (SSME). For example, by data management (SSDA), sensing data is recorded in an appropriate column of a database for each data element based on tag information. Even when the sensing data is read from the database, processing such as selecting necessary data based on the time information and the terminal information and rearranging in order of time is performed.

  The performance input (C) is a process for inputting a value indicating performance. Here, the performance is a subjective or objective evaluation determined based on some criterion. For example, a person wearing a name tag type sensor node TR at a predetermined timing inputs a subjective evaluation (performance) value based on some criteria such as the degree of achievement of business at that time, the degree of contribution to the organization, and the degree of satisfaction. To do. The predetermined timing may be, for example, once every several hours, once a day, or when an event such as a meeting ends. A person wearing the name tag type sensor node TR can input a performance value by operating the name tag type sensor node TR or operating a personal computer (PC) such as the client CL. Alternatively, values entered by handwriting may be collectively input later on a PC. In the present embodiment, an example is shown in which a name tag type sensor node can input performances of a person (SOCIAL), a line (INTELLECTUAL), a mind (SPIRITUAL), a body (PHYSICAL), and knowledge (EXECUTE) as ratings. The input performance value is used for analysis processing. The meaning of each question is: “Do you have a rich relationship (cooperation / sympathy)?”, “Do you have done what you need to do?”, “Do you feel fulfilled and fulfilled?” "The body is," Did you consider the body (rest, nutrition, exercise)? "," Did you get new knowledge (notice, knowledge)? "

  Organizational performance may be calculated from individual performance. Objective data such as sales or cost, and already digitized data such as customer questionnaire results may be periodically input as performance. When a numerical value is automatically obtained, such as an error occurrence rate in production management, the obtained numerical value may be automatically input as a performance value. Furthermore, economic indicators such as gross domestic product (GNP) may be entered. These are stored in the organization information table (H).

  The application server AS shown in FIG. 1D analyzes and processes the organization dynamics data. Upon receiving a request from the client CL shown in FIG. 1F, the analysis application is automatically activated at the set time. The analysis application requests the sensor network server SS shown in FIG. 1C to acquire necessary organization dynamics data. Further, the analysis application analyzes the acquired tissue dynamics data and returns the analysis result to the client CL shown in FIG. 1F. Alternatively, the analysis application may record the analysis result as it is in the analysis result database (F).

  The application used for the analysis is stored in the analysis algorithm (D) and is executed by the control unit (ASCO). The processes executed by this embodiment are modeling analysis (CA), personality index extraction analysis (CA1), and personality index conversion analysis (CA2).

  The application server AS includes a transmission / reception unit (ASSR), a storage unit (ASME), and a control unit (ASCO).

  The transmission / reception unit (ASSR) transmits and receives organization dynamics data between the sensor network server SS shown in FIG. 1C and the client CL shown in FIG. 1F. Specifically, the transmission / reception unit (ASSR) receives a command transmitted from the client CL, and transmits an organization dynamics data acquisition request to the sensor network server SS. Further, the transmission / reception unit (ASSR) receives the organization dynamics data from the sensor network server SS and transmits the analysis result to the client CL.

  The storage unit (ASME) is configured by an external recording device such as a hard disk, a memory, or an SD card. The storage unit (ASME) stores setting conditions for analysis and analysis results. Specifically, the storage unit (ASME) includes a user / location information table (I), an organization information table (H), a questionnaire (G), an analysis result table (F), an analysis condition period table (E), and an analysis algorithm. Store (D).

  The user / location information table (I) is a table in which personal information such as a user's name, job title, and user ID, and field information are described.

  The organization information table (H) contains general data such as productivity (HA) and accident failure (HB) necessary for modeling the organization, and data necessary for organizational activities such as climate and stock prices. It is a stored table.

  The questionnaire (G) is a table in which questionnaires to be performed by the user and their responses are stored.

  The analysis result table (F) is a table in which the result of analyzing the tissue dynamics data (organization dynamics index) and the result of analyzing the questionnaire result are stored.

  The analysis condition period table (E) is a table that temporarily stores analysis conditions for display requested by the client CL.

  The analysis algorithm (D) stores a program used for analysis. In accordance with a request from the client CL, an appropriate program is selected, sent to the control unit (ASCO), and analyzed.

  The control unit (ASCO) includes a central processing unit CPU (not shown), and performs control of data transmission / reception and analysis of sensing data. Specifically, a CPU (not shown) executes a program stored in the storage unit (ASME), so that communication control (ASCC), modeling analysis (CA), personality index extraction analysis (CA1), personality index Conversion analysis (CA2) is performed.

  Communication control (ASCC) controls the timing of communication with the sensor network server SS and client data CL by wire or wireless. Further, the communication control (ASCC) executes data format conversion and sorting of destinations by data type.

  Modeling analysis (CA) is a process of modeling the main factors of problems that the organization has from the organization dynamics data and questionnaire results. Modeling analysis (CA) includes face-to-face table creation (C1A), body rhythm table creation (C1B), face-to-face matrix creation (C1C), network index extraction (CAA), body rhythm index extraction (CAB), face-to-face index extraction (CAC) ), Organization activity index extraction (CAD), correlation analysis (CAE), and factor selection (CAF).

  The face-to-face table creation (C1A) is a process of creating a table related to face-to-face, which is rearranged in time series for each user from the organization dynamics data.

  The body rhythm table creation (C1B) is a process of creating a table related to the body rhythm, which is rearranged in time series for each user from the tissue dynamics data.

  Face-to-face matrix creation (C1C) is a process of creating a table in which the face-to-face for each user is gathered in a matrix from the result of face-to-face table creation (C1A).

  Network index extraction (CAA) analyzes a network-related index in an organization dynamics index from a face-to-face table.

  Body rhythm index extraction (CAB) analyzes an index related to body rhythm in a tissue dynamics index from a body rhythm table.

  Face-to-face index extraction (CAC) analyzes a face-related index in the tissue dynamics index from the face-to-face table and the body rhythm table.

  Activity index extraction (CAD) analyzes an index related to a tissue in a tissue dynamics index from a face-to-face table and a body rhythm table.

  Correlation analysis (CAE) is an analysis for obtaining a correlation between an organization dynamics index and a questionnaire result.

  Factor selection (CAF) is a process of selecting beneficial factors as a result of correlation analysis.

  The personality index extraction analysis (CA1) and the personality index conversion analysis (CA2) conventionally acquire user's subjective data from a questionnaire, but for obtaining a personality index from organizational dynamics data without using this questionnaire. It is processing.

  In the personality index extraction analysis (CA1), the contribution coefficient of the organization dynamics index is obtained for each questionnaire item. This is processing performed by personality index coefficient extraction (CA1A).

  The personality index conversion analysis (CA2) is a process for obtaining an index serving as a substitute for the questionnaire from the organization dynamics index and the contribution coefficient obtained by the personality index extraction analysis (CA1). This is a process performed by personality index conversion (CA2A).

  The analysis result is transmitted from the analysis result table (F) or the transmission / reception unit (ASSR) to the display (J) of the client CL shown in FIG. 1F.

  The diagnosis server DS shown in FIG. 1E diagnoses whether the system is operating normally. Upon receipt of a request from the management system AM shown in FIG. 1G, the diagnosis application is automatically activated at a set time.

  The diagnostic application acquires data from the sensor network server SS, and determines whether there is any missing or abnormal data by a data consistency check (DSC). Moreover, the name tag type sensor node and base station that have not been in communication for a long period of time from the heart beat information transmitted from the name tag type sensor node and the base station stored in the sensor network server SS by heartbeat counting (DHC). Wash out. Battery life management (DBC) monitors the battery life of a beacon stored in the sensor network server SS.

  The diagnosis result may be displayed by the management system AM or stored in a diagnosis result database (DF).

  An application used for diagnosis is stored in a diagnosis algorithm (DDA) and is executed by the control unit (DSCO).

  The diagnostic server DS includes a transmission / reception unit (DSSR), a storage unit (DSME), and a control unit (DSCO).

  The transmission / reception unit (DSSR) transmits and receives system self-diagnosis results between the sensor network server SS shown in FIG. 1C and the management system AM shown in FIG. 1G. Specifically, the transmission / reception unit (DSSR) receives a command transmitted from the management system AM, and transmits an organization dynamics data acquisition request to the sensor network server SS. Further, the transmission / reception unit (DSSR) receives the organization dynamics data from the sensor network server SS and transmits the analysis result to the management system AM.

  The storage unit (DSME) is configured by an external recording device such as a hard disk, a memory, or an SD card. The storage unit (DSME) stores setting conditions for analysis and analysis results. Specifically, the storage unit (DSME) includes a name tag node table (DTN), a beacon table (DTB), a base station table (DTK), a diagnosis condition period table (DTM), a diagnosis result table (DF), a diagnosis algorithm ( DDA).

  A name tag node table (DTN), a beacon table (DTB), and a base station table (DTK) are tables in which information on name tag type sensor nodes, beacons, and base stations to be diagnosed is described. The diagnosis condition period table is a table that stores conditions for diagnosis and a period. The diagnosis result table (DF) is a table in which the results of system diagnosis are stored.

  The diagnosis algorithm (DDA) stores a program used for diagnosis. In accordance with a request from the management system AM, an appropriate program is selected and sent to the control unit (DSCO) for analysis.

  The control unit (DSCO) includes a central processing unit CPU (not shown), and executes control of data transmission / reception and analysis of sensing data. Specifically, a CPU (not shown) executes a program stored in the storage unit (DSME), so that communication control (DSCC), heartbeat counting (DSC), battery life management (DBC), data consistency A check (DSC) is performed.

  Communication control (DSCC) controls the timing of communication with the sensor network server SS and the management system AM by wire or wireless. Further, the communication control (DSCC) executes data format conversion and destination distribution according to data type.

  The diagnosis result is transmitted from the diagnosis result table (DF) or the transmission / reception unit (DSSR) to the display (AMJ) of the management system AM shown in FIG. 1F.

  The management system AM shown in FIG. 1F is a contact point with the system administrator, and is an interface for displaying a system diagnosis result and displaying and managing a system state. The management system AM includes an input / output unit (AMIO), a transmission / reception unit (AMSR), a storage unit (AMME), and a control unit (AMCO).

  The input / output unit (AMIO) is a part serving as an interface with the system administrator. The input / output unit (AMIO) includes a display (AMOD), a keyboard (AMIK), a mouse (ATIM), and the like. If necessary, other input / output devices can be connected to an external input / output (AMIU).

  The display (AMOD) is an image display device such as a CRT (CATHODE-RAY TUBE) or a liquid crystal display. The display (AMOD) may include a printer or the like.

  The transmission / reception unit (AMSR) transmits and receives data to and from the diagnostic server DS shown in FIG. 1E or the sensor network server SS shown in FIG. 1C. Specifically, the transmission / reception unit (AMSR) transmits a diagnosis condition (AMMP) to the diagnosis server DS and receives a diagnosis result.

  The storage unit (AMME) is configured by an external recording device such as a hard disk, a memory, or an SD card. The storage unit (AMME) records information necessary for drawing, such as analysis conditions (AMMP) and drawing setting information (AMMT). The analysis condition (AMMP) records conditions such as the number of members to be diagnosed and selection of an analysis method set by the user. The drawing setting information (AMMT) records information about a drawing position such as what is plotted in which part of the drawing. Further, the storage unit (AMME) may store a program executed by a CPU (not shown) of the control unit (AMCO).

  The control unit (AMCO) includes a CPU (not shown), and executes communication control, input of analysis conditions from the system administrator, drawing for presenting diagnosis results to the system administrator, and the like. Specifically, the CPU executes a program stored in the storage unit (AMME) to perform communication control (AMCC), analysis condition setting (AMIS), drawing setting (AMTS), and display (AMJ) processing. Execute.

  Communication control (AMCC) controls the timing of communication with diagnostic server DS or sensor network server SS by wire or wireless. In addition, the communication control (AMCC) converts the data format and distributes the destination according to the data type.

  The diagnosis condition setting (AMIS) receives an analysis condition designated from the user via the input / output unit (AMIO), and records it in the diagnosis condition (AMMP) of the storage unit (AMME). Here, a period of data used for diagnosis, a member, a type of diagnosis, parameters for diagnosis, and the like are set. The management system AM sends these settings to the diagnostic server DS, requests analysis, and executes drawing settings (AMTS) in parallel therewith.

  The drawing setting (AMTS) calculates a method for displaying the analysis result based on the analysis condition (AMMP) and a position for plotting the drawing. The result of this processing is recorded in the drawing setting information (AMMT) of the storage unit (AMME).

  The display (AMJ) generates a display screen based on the format described in the drawing setting information (AMMT) based on the analysis result acquired from the diagnostic server DS.

<Details of business microscope hardware>
Next, details of hardware constituting a business microscope system which is an embodiment of the sensor data collection system will be described with reference to FIGS.

<Details of name tag type sensor node hardware>
FIG. 2 is an external view showing an example of the structure of the name tag type sensor node. The name tag type sensor node is used by attaching a neck strap or a clip to the strap attaching portion NSH and attaching it to a person's neck or chest.

  The surface with the strap attachment portion NSH is defined as the upper surface, and the opposite surface is defined as the lower surface. In addition, when a name tag type sensor node is mounted, a surface facing the other party is defined as a front surface, and a surface facing the front surface is defined as a back surface. Further, a surface located on the left side when viewed from the front of the name tag type sensor node is defined as a left side, and a surface facing the left side is defined as a right side. Therefore, (A) in the figure is a front view, (B) in the figure is a back view, and (C) in the figure is a bottom view.

  As shown in the rear view of FIG. 2B, a liquid crystal display device (LCDD) is arranged on the rear surface of the name tag sensor node. This liquid crystal display device displays tissue activity feedback data for the wearer.

  The LED lamps LED1 and LED2 shown in the front view of FIG. 5A are used to notify the wearer and the person facing the wearer of the state of the name tag type sensor node. The LEDs 1 and 2 are guided to the front surface and the upper surface, and in a state where the name tag type sensor node is mounted, the lighting state can be visually recognized from both the wearer and the person facing the wearer.

  As described above, the name tag type sensor node incorporates the speaker SP, and is used to notify the wearer and the person facing the wearer of the state of the name tag type sensor node by a buzzer or voice. The microphone MIC acquires the speech of the name tag type sensor node wearer and surrounding sounds.

  The illuminance sensors LS1F and LS1B are respectively arranged on the front surface and the back surface of the name tag type sensor node. It is detected from the illuminance value acquired by LS1F and LS1B that the attached name tag type sensor node is turned over, and the wearer is notified.

  As is clear from (A) of the figure, on the left side of the name tag type sensor node, three buttons BTN1, BTN2, and BTN3 are arranged to change the operation mode of the wireless communication and switch the liquid crystal display screen. Do.

  On the lower surface of the name tag type sensor node, a power switch PSW, a reset button RBTN, a cradle connector, and a cradle interface CRDIF are provided.

  A plurality of infrared transmission / reception units TRIR1 to TRIR1 are arranged in front of the name tag type sensor node. It is a structure peculiar to the name tag type sensor node of the present embodiment that a plurality of infrared transmission / reception units are provided. It has the function of intermittently transmitting the identification number (IRID) of the name tag type sensor node itself by infrared rays and receiving the identification number transmitted by the name tag type sensor node worn by the person in contact. As a result, when and which name tag type sensor node has faced each other is recorded, it is possible to detect the face-to-face situation between the wearing humans. The embodiment shown in FIG. 2 shows an example in which four infrared transmission / reception units TRIR1 to TRIR1 are arranged on the upper part of the sensor node.

  An example of a specific hardware configuration of the name tag type sensor node TR shown in FIGS. 1A and 2 is shown in FIG.

  Basically, the name tag type sensor node TR is supplied with power from the built-in secondary battery BATT and operates with a power source stabilized by a regulator (REG), but via an interface (CRDIF) with the cradle CRD. It can also operate with an external power supply. EPOW + and EPOW− are power supply lines supplied from the outside, respectively, and operate the main body and charge the built-in secondary battery.

  The PDETS signal is connected to a general purpose IO port (PIO) inside the name tag type sensor node, so that the name tag type sensor node body can recognize whether or not power is supplied from the external power supply unit.

  A microcomputer (MCU) performs central control of the name tag type sensor node. This MCU is a large scale integrated circuit (LSI) in which various peripheral functions are integrated via an internal bus (IBUS) in addition to a central processing unit (CPU). In general, typical peripheral functions incorporated in a microcomputer include a serial interface (SIO), an A / D converter (ADC), a memory such as a flash memory (FRASH) and a random access memory (RAM), a timer ( TIMR) and general purpose IO port (PIO). FIG. 3 shows an example of a microcomputer MCU in which 2-channel serial interfaces SIO1 and SIO2, an A / D converter ADC, a timer TIMR, a general-purpose IO port PIO, a random access memory RAM, and a flash memory FLSH are integrated. It goes without saying that various functional blocks such as TRTMG and self-diagnostic unit SDG shown in FIG. 1A are realized by program execution of the CPU of this MCU.

  In the name tag type sensor node TR, the information obtained from the various sensors ACC, THM, LS1F, LS1B is converted into a digital value by the A / D converter ADC, and the face-to-face information obtained by the infrared transmission / reception units TRIR1 to TRIR4, The data is stored in the storage unit STRG and transmitted to the base station GW via the radio communication circuit RF. Further, data obtained from various sensors is analyzed and displayed on the display device LCDD. The display device LCDD is controlled by the microcomputer MCU via the LCDIF by the serial interface SIO2.

  The triaxial acceleration sensor ACC, the microphone MIC that acquires sound, the temperature sensor THM, and the illuminance sensors LS1F and LS1B are connected to the A / D converter ADC. The sound input from the microphone is amplified to an appropriate output by the amplifier IAMP, and then processed by the filter LPF1 at the Nyquist frequency that removes aliasing due to sampling. In this embodiment, both the voice as it is (SNDD) and the voice energy that has passed through the voice envelope circuit (AVG) are acquired by the A / D converter ADC.

  Similarly, the data THMD acquired by the temperature sensor THM and the data LS1FD and LS1BD acquired from the illuminance sensors LS1F and LS1B are also connected to the A / D converter ADC.

  In general, the number of input ports of the A / D converter ADC is finite, while the sensors to be connected vary. When the number of ports of the A / D converter is insufficient with respect to the number of sensors, it can be expanded by connecting an external analog switch, but this is not shown in this embodiment.

  For audio output to the speaker SP, the output of the general-purpose port PIO is amplified by the output amplifier OAMP to drive the speaker SP.

  The wireless communication circuit RF communicates with the microcomputer MCU via RFIF that is serial communication. In addition, since the infrared transceivers of the infrared transceivers TRIR1 to 4 that receive IDs from other name tag type sensor nodes and acquire face-to-face information need to always perform a standby operation, the serial port channel 1 (SIO1) is used. Connecting. In this embodiment, the transmission circuits of the four infrared transmission / reception units TRIR1 to TRIR4 are all driven by a common channel 1 serial transmission signal SIO1TxD, and reception is performed by a logical sum circuit (IROR1) of each light receiving unit. And connected to the channel 1 serial reception signal SIO1RxD.

  Here, it is a structure peculiar to the present embodiment to have a switch capable of individually turning on / off a plurality of infrared transmitters and receivers. This enables a self-diagnosis of an infrared transmitter / receiver described later. The on / off control switch includes a transmission circuit switch (IRTSW) and a reception circuit switch (IRRSW) connected to each of the infrared transmission / reception units TRIR1 to TRIR4. These switches are individually turned on / off under the control of the CPU or the like in the MPU that implements the self-diagnosis unit SDG.

  Three buttons (BTN1 to BTN3) are connected to the general-purpose input port PIO. The signal STRGIF to the storage unit STRG, the signal RTCIF to the real-time clock RTC for obtaining the absolute time, and the communication means EXTSIO with the cradle CRD also use serial communication. It is time information based on the real-time clock RTC that determines the operation timing of the CPU of the name tag type sensor node. By pressing the reset button RBTN, the CPU can be reset via the reset interface RSTS.

<Hardware configuration of nameplate type sensor node cradle>
Hardware for charging the built-in secondary battery of the name tag type sensor node TR is a cradle CRD. A specific example of the hardware configuration of the name tag type sensor node cradle CRD in the present embodiment will be described with reference to FIG.

  The cradle CRD charges one or more name tag type sensor nodes TR. In this embodiment, an example having n cradle interfaces CRDIF is shown, and a case where name tag type sensor nodes TR1, TR2, and TRn are connected is illustrated.

  The power supplies AC + and AC− connected to the cradle are connected to the name tag type sensor node TR through the charging circuit CHG and charge the built-in secondary battery BATT. When the name tag type sensor node TR is attached to the cradle CRD, the external power supply EPOW + terminal of the cradle interface CRDIF and the external power source detection PDETS are short-circuited, so that the name tag type sensor node TR main body is recognized to be attached to the cradle CRD. it can.

  In this embodiment, the cradle CRD main body also includes the three-axis acceleration sensor ACC and the temperature sensor THM. This is used for calibration of the built-in sensor of the name tag type sensor node TR, and a specific method will be described later.

  The cradle CRD of the present embodiment also has a function in which the name tag type sensor node TR receives the external serial input / output terminal EXTSIO, converts it into universal serial bus data USBD, and outputs it. The USB serial bridge USBBRG converts serial input / output and USBD. Further, a switch CRDUSBSW for adjusting serial outputs of a plurality of name tag type sensor nodes TR is provided, and this is controlled by a controller CRDCNT of the cradle CRD.

  This USB data transfer function makes it possible to collect sensor data and diagnostic data stored in a nonvolatile memory inside the name tag type sensor node in a batch. In other words, it means that data can be collected in the background when the name tag type sensor node TR is charged with a cradle without taking out data using wireless communication. In this case, the base station GW illustrated in FIG. 1B corresponds to the cradle CRD. In this case, it is connected to a personal computer PC having a sensor network server SS function via the USB port SSIF. Note that the cradle CRD in this case may be referred to as a base station GW.

<Hardware of a stationary infrared transmitter (infrared beacon)>
FIG. 5 shows the configuration of a stationary infrared transmitter. The stationary infrared transmitter / receiver is hardware having a function of periodically transmitting a unique infrared ID, and when the name tag type sensor node TR receives this infrared ID, the wearer can install the stationary infrared transmitter / receiver. Used to determine that you were in the vicinity. In other words, by installing the infrared transmitter / receiver at a predetermined location, it is possible to know when the wearer was there. Hereinafter, the infrared transceiver is referred to as an infrared beacon.

  The infrared beacon has one or more infrared transmitters BCNIR. The embodiment shown in FIG. 5 shows an example in which nine infrared transmitters BCNIR1 to 9 are installed. The reason for installing multiple sensors is to transmit infrared rays over a wider range by installing them at different angles. It is also possible to transmit different infrared IDs for each direction. BCNIR 1 to 9 are controlled in transmission by the infrared transmitter control unit BCNCNT.

  The infrared beacon is driven by the built-in battery BCNBATT. However, since the infrared beacon is installed in various places for a long period of time, it is difficult to manage the remaining amount of the battery. Therefore, in this embodiment, there is a mechanism for detecting the remaining battery level of BCNBATT by LIFEDET and transmitting it by infrared rays.

  The unique ID of the infrared beacon is stored in the non-volatile memory BCNID, and is read and transmitted via BCNIRDT as appropriate. In the present embodiment, the switch BCNSW is switched by a timer (BCNTM), and a function of transmitting the remaining battery level by infrared rays instead of the ID is provided. Normally, the unique infrared ID stored in the BCNID is transmitted, but when the BCNSW is switched, the remaining battery capacity of the beacon is transmitted instead of the ID. This is received by the name tag type sensor node and registered in the sensor network server SS together with its own sensor data, so that the remaining battery level of the infrared beacon can be detected by the system.

<Self-diagnosis by infrared optical loopback>
The name tag type sensor node in this embodiment has a plurality of infrared transceivers as described above. In order to detect failures in these multiple infrared transmission circuits and reception circuits, all of the transmission / reception circuits of the infrared transmission / reception circuits can be turned on / off individually (ie, have a self-diagnosis function). This is a feature of the embodiment.

  FIG. 6 shows a specific configuration of the infrared transmission / reception unit TRIR of the name tag type sensor node TR in the present embodiment. As described in the explanation of FIG. 3, the infrared transmission of the name tag type sensor node TR uses the SIOTxD terminal in all the transmission circuits and the SIO1RxD terminal in common in all the reception circuits.

  As described above, the infrared transceivers TRIR1 to TRIR4 cannot simultaneously perform transmission and reception in the same module in order to prevent transmission and reception interference. Therefore, it is impossible to perform reception by loopback while simultaneously performing the transmission operation of all infrared modules.

  Therefore, in the present embodiment, at the time of self-diagnosis, transmission / reception is individually switched for each module, thereby enabling reception by an infrared receiver of a module different from the transmitted infrared transmitter. For example, TRIR1 in FIG. 6 transmits and TRIR2 receives.

  In the figure, signals for individually turning on / off the infrared transceivers TRIR1 to 4 are reception enable IRRE1, IRRE2, IRRE3, IRRE4, transmission enable IRTE1, IRTE2, IRTE3, and IRTE4. As a result, the switches IRRSW1, IRRSW2, IRRSW3, and IRRSW4 of the reception circuit and the switches IRTSW1, IRTSW2, IRTSW3, and IRTSW4 of the transmission circuit are controlled, respectively, and the transmission circuit and the reception circuit are controlled individually.

  An example of a combination of transmission and reception at the time of diagnosis is shown in FIG. FIG. 8A shows an example of diagnosing all combinations of transmission and reception. When diagnosing four sets of infrared transceivers TRIR1 to 4 in all combinations, 12 diagnoses are necessary.

  However, when a failure is detected, it is only necessary to confirm at least one reception and transmission. Therefore, more simply, at least one transmission / reception can be diagnosed as shown in FIG. The number of times required to transmit / receive the four sets of infrared transceivers TRIR1 to TRIR1 at least once is four.

  Next, the specific configuration of the infrared transceivers TRIR1 to TRIR1 in this embodiment and the transmission / reception control method will be described in more detail with reference to FIG. 7A. The receiving circuit of the infrared transmitter / receiver TRIR1 includes an infrared photodiode IRRPT and an infrared amplifier IRRAMP. In the configuration of FIG. 7A, the infrared photodiode IRRPT is connected between the power supply IRIRV for the receiving circuit and the ground TRIRGND via a resistor IRRR. When the infrared photodiode IRRPT receives infrared rays, the resistance value thereof changes, and the change is amplified by the infrared amplifier IRRAMP to receive the infrared signal.

  In this embodiment, when infrared rays are received, the output of the infrared IRRAMP amplifier is a low level output, and when no infrared rays are received, a high level output is obtained, that is, the reception signal TRIR1RxD is received as a negative logic signal. Negative logic reception signals TRIR2RxDN to TRIR4RxDN received by the other infrared transceivers TRIR2 to TRIR4 are received as one reception signal SIO1RxDN by performing a logical OR. These signals are negative logic and are logically ORed by an AND circuit IRRAND.

  The transmission circuit of the infrared transceiver TRIR1 includes an infrared light emitting diode IRTLED and its driver circuit IRTDRV. In the embodiment of FIG. 7A, the cathode of the infrared light emitting diode IRTLED is connected to the transmission power source IRIRLEDV. When the low level is driven to the cathode of the infrared light emitting diode by the infrared light emitting diode driver IRTDRV, the infrared light emitting diode IRTLED emits light.

  As described above, the transmission signal SIO1TxD is a transmission signal common to all infrared transceivers built in the name tag type sensor node. In order to individually control the validity / cutoff, for example, the transmission enable signal IRTE1 and the transmission signal SIO1TxD of the infrared transmitter / receiver TRIR1 are logically ANDed using the AND circuit IRAND1.

  In general, infrared transmission uses a pulse signal train, and a very large current flows instantaneously. In many cases, the power supply TRIRV of the receiver and the power supply TRIRLEDV of the transmitter use different power supply lines.

  The transmission driver IRTDRV generates a reception invalid signal IRRSUP when the infrared light emitting diode IRTLED is emitting light. By this signal, the operation of the IRRAMP is interrupted while the IRTLED is issued, and the reception operation is not performed. The purpose of this is to prevent the receiving circuit from malfunctioning due to noise due to a large current during infrared emission. Therefore, the infrared transmitter / receiver of this configuration cannot receive the infrared data emitted by itself.

  The power down circuit IRRPDN built in the infrared transmitter / receiver TRIR1 is a terminal for shifting the TRIR1 to the low power consumption mode. By setting the power down signal IRPD1 to the high level, the infrared transmitter / receiver TRIR1 shifts to a mode in which neither transmission nor reception is performed regardless of the state of other input signals, thereby reducing power consumption. The power-down circuit IRRPDN generates a cutoff signal IRPDS by the power-down signal IRPD1, and cuts off the operations of the reception amplifier IRRAMP and the transmission driver IRTDRV.

  In the embodiment shown in FIG. 6, a mechanism for individually turning on and off the transmission circuit and the reception circuit for all infrared transceivers is shown. A down signal can also be used. This is because the present embodiment shows that the data is received by an infrared transmitter / receiver that is different from the infrared transmitter / receiver that transmitted infrared rays, and the infrared transmitter / receiver used for transmission / reception can block reception by a power-down signal. Because.

  FIG. 7B shows a more practical configuration of optical feedback using the configuration of the infrared transceiver shown in FIG. 7A. The control signal of the infrared transceiver is negative logic, and the logical sum of the negative logic signals is described by AND.

  In the present embodiment, an example is shown in which power-down signals (IRPD1 to IRPD4) are used instead of the reception side enable signal (IRRE). When activated, the power-down signal has a function of neither transmitting nor receiving. Therefore, the module that wants to receive data can be made to receive only by setting the power down signal to be in an operating state and setting the transmission enable IRTE to be negative.

  Now, in order to diagnose the infrared transmitter / receiver optically by looping back, it is necessary to receive the data transmitted by the name tag type sensor node by itself. Depending on the direction in which the infrared transmitter / receiver is installed, there may be a case where the data transmitted by itself cannot be directly received. In this case, it is preferable to use reflection.

  FIG. 9A shows an example in which the optical loopback of the infrared transmitter / receiver is performed by reflection in a state where the cradle CRD is mounted. By making the name tag type sensor node TR with a color or material that is easy to reflect, the loopback can be surely performed by the reflection of the nearby casing.

  Further, when the name tag type sensor node TR does not exist in the vicinity, or when it is attached to the slot at the end of the cradle CRD, reflection from an object such as a nearby wall is used.

  However, it can be said that the infrared transmitter / receiver in the enclosure is sufficiently close, and in fact, a loopback is often formed by reflection in the enclosure.

<Calibration of acceleration sensor and temperature sensor>
As shown in FIG. 4, in the present embodiment, the cradle includes a three-axis acceleration sensor ACC and a temperature sensor THM. This compares the values of the three-axis acceleration sensor and the temperature sensor of the name tag type sensor node mounted on the cradle with those of the cradle, thereby enabling detection of a failure and calibration.

  FIG. 9B shows an example in which the acceleration sensor is calibrated with the name tag type sensor node TR mounted on the cradle. Since the cradle CRD and the name tag type sensor node TR are fixed, the three-axis acceleration sensor ACC provided in both should have the same value. Therefore, failure detection and calibration are performed by comparing both sensor outputs.

  Further, regarding the temperature, it is assumed that the name tag type sensor node TR and the cradle CRD arranged in the vicinity are close, and the temperature sensor can be calibrated.

<Relay operation for battery life>
As described with reference to FIG. 5, the stationary infrared transmitter (infrared beacon) in the present embodiment has a function of transmitting not only its own unique ID (BCNID) but also its own battery remaining amount by infrared rays. The name tag type sensor node TR that has received the battery remaining amount information stores the information in the internal nonvolatile memory FLSH and then stores it in the sensor network server SS.

  The timing of this operation will be described with reference to FIGS. FIG. 10 shows a case where a name tag type sensor node transmits / receives data using wireless communication, and FIG. 11 shows a case where a name tag type sensor node transmits data by wire when charging using a cradle CRD instead of wireless communication. It is an example.

  In FIG. 10, the infrared beacon BCN intermittently transmits a BCNID that is its own unique ID. Let that interval be TINTIR. Further, it transmits its own battery level (BCNBAT) at the interval TINTBT. Although the magnitude relationship between TINTIR and TINTBT is not particularly defined, in this embodiment, an example in which TINTBT is larger is shown. Of course, the transmission interval may or may not be constant. The wireless communication name tag type sensor node wirelessly communicates with the base station intermittently at an interval TINTID, and transmits sensor data (RTDT) and battery remaining amount information. The base station GW that has received the sensor data (RTDT) transmits it as a BSDT to the sensor network server and stores the data.

  FIG. 11 shows the timing when the name tag type sensor node TR does not communicate with the base station GW during normal data acquisition, for example, when it does not have a wireless communication function.

Infrared beacons have intervals TINTIR and TINTBT as in the example of FIG.
Transmits the infrared ID (BCNID) and the remaining battery level (BCNBAT). The name tag type sensor node TR which has received the information records this information in the internal nonvolatile memory.

  After that, when the name tag type sensor node TR is attached to the cradle CRD at the timing TCRD, the sensor data stored in the nonvolatile memory and the battery remaining amount information are transmitted to the base station GW as RTDT by wireless or wired communication. The station GW stores this in the sensor network server SS as a BSDT.

  When the name tag type sensor node is mounted on the cradle, the central processing unit CPU) detects the mounting based on the PDETS signal from the CRDIF, and triggered the self-diagnosis (P110) of the infrared transceiver and sensor described above. ) Can also be performed.

  With the above operation, the battery remaining amount information of the infrared beacon can be collected in the sensor network server SS.

<Heartbeat>
In a system in which the name tag type sensor node TR periodically transmits data, it is possible to confirm that the terminal is operating by confirming whether there is data stored in the sensor network server SS. However, when the cradle CRD is charged and charged, data is not acquired, and therefore data is not transmitted.

  When the cradle CRD is mounted, the name tag type sensor node TR intermittently transmits data and confirms its normal operation is a function called heartbeat. Similarly, the cradle CRD can confirm its normal operation by periodically transmitting data. The transmitted data is stored in the sensor network server SS as a heartbeat. The diagnosis server DS can confirm the normal operation of the system at a remote place by confirming the time stamp of the heartbeat information stored in the sensor network server SS.

  The heartbeat operation of the name tag type sensor node TR and the cradle CRD is shown in FIG. When attached to the cradle CRD, the name tag type sensor node TR stores untransmitted sensor data and the like stored in its nonvolatile memory in the sensor network server SS via the cradle CRD, that is, the base station GW. At this time, the above-described self-diagnosis (P110) may be performed.

  When the transmission of the sensor data is completed, the name tag type sensor node TR basically does not need to collect data when it is not worn by a person, so that it is not necessary to actively transmit the data. However, the normal operation history can be left in the sensor network server SS by transmitting a heartbeat signal (RTHB) indicating normal operation. The interval at which heartbeats are transmitted is defined by TINTHBN. Similarly, the cradle CRD notifies itself of normal operation by transmitting a periodic heartbeat (BSHB). The interval at which the cradle CRD heartbeat is transmitted is defined by TINTHBB.

  If there is a period during which data is not transmitted to the sensor network server SS beyond the interval of TINTHBN and TINHBB, it is determined that some abnormality has occurred in the name tag type sensor node TR or the cradle CRD.

  An operation in which the name tag type sensor node TR is attached to the cradle CRD and performs heartbeat transmission from the normal operation will be described using the flows of FIGS. 13A, 13B, and 13C. Although the drawing was divided into three pieces for the sake of space, one flow is shown as a whole.

  When the power is turned on, the name tag type sensor node TR first associates with the base station GW (P117) to open the communication path and synchronizes the time with the system (P118). If the time is not properly synchronized, the acquired data cannot be compared with others. When the time synchronization is completed, sensing is performed in an intermittent operation (TP). The intermittent operation timing is defined by TTR3 (P101), and sensor value acquisition (P102) and transmission (103) are performed. If the system does not have a wireless communication function or if wireless communication is not possible for some reason, the sensor data acquired for later transmission to the sensor network server is stored in the storage unit (P104).

  During the intermittent operation, it is always monitored (P105) that the cradle CRD is mounted, and the normal intermittent operation is continued unless the cradle CRD is mounted.

  When the name tag type sensor node TR is attached to the cradle CRD, normal sensing is stopped, and the data accumulated in the storage unit cannot be transmitted and transmitted to the sensor network server SS via the base station GW. Migrate to

  Since sensing is not performed in the collective feed (TC), the transmission interval (TTR4) may be shorter than the transmission interval (TTR3) during normal operation. The data read from the storage unit is transmitted (P107, P108), and repeatedly transmitted until all the data is completed (P109).

  When all the data has been transmitted, the self-diagnosis (P110) is performed and the result is transmitted (P111). In this flow example, the self-diagnosis is performed after the collective sending. However, of course, the self-diagnosis may be performed before the collective sending.

  Thereafter, the operation shifts to an operation of transmitting a heartbeat at the transmission interval TTR5 (P112, P113) and continues until it is removed from the cradle (P114). When it is removed from the cradle, it returns to normal intermittent motion sensing.

<Display example of system diagnosis result>
An example of a diagnosis result displayed on the management system AM will be described with reference to FIGS. 14A, 14B, and 14C.

  FIG. 14A shows an example of an infrared beacon management screen. A list of all IDs of infrared beacons is displayed, and those that are determined to be abnormal are highlighted in bold and a mark is displayed in the status column. The information for determining the abnormality of the infrared beacon is battery remaining amount information and the last communication date and time. The remaining battery level information is determined based on the remaining battery level information relayed by the name tag type sensor node TR and stored in the sensor network server SS. From the last communication date and time, if no ID is received by any name tag type sensor node TR for a long period of time, it is determined to be abnormal because the suspension is suspected. In this example, ID69-03, ID69-13, and ID69-14 indicate an abnormality in the remaining battery level, and ID69-02 and ID69-11 indicate an abnormality in the last communication date and time.

  FIG. 14B is an example of a cradle CRD management screen. A list of all the IDs of the cradle CRD is displayed, and those that are determined to be abnormal are highlighted in bold and a mark is displayed in the status column. Information for determining an abnormality in the cradle CRD is the data size received that day, the diagnostic information sent from the attached name tag type sensor node TR, and the last communication date and time. In this example, ID000002 is highlighted as 0 bytes of data received that day, and ID000003 is highlighted as abnormal diagnostic information from the name tag type sensor node TR. Clicking on a row displays detailed information on the cradle CRD with that ID. In this example, it is shown that NG was issued by self-diagnosis of three terminals among the name tag type sensor nodes TR mounted in the 10 slots of the cradle CRD.

  FIG. 14C is an example of the management screen of the name tag type sensor node TR. A list of all IDs of the name tag type sensor node TR is displayed, and those judged to be abnormal are highlighted in bold and a mark is displayed in the status column. The “x” in the data column indicates that the acquired data is not continuous and lacks. In addition, infrared, acceleration, sound, illuminance, and temperature sensors indicate the quality of the self-diagnosis results. In this example, ID1E06-8602, ID1E06-8605, and ID1E06-8612 have abnormal sensor self-diagnosis results, and ID1E06-8608 and ID1E06-8612 have abnormal data continuity.

  Clicking on a row displays detailed information on the name tag type sensor node with that ID. In this example, it is displayed that there was a lack of data between 12:00 and 18:00 on March 20th in the name tag type sensor node of ID1E06-8608.

  As described above in detail, according to the present invention, in a business microscope system that collects data from a plurality of terminals equipped with a sensor and an infrared transceiver, an infrared ray is transmitted while minimizing mutual interference between a transmission circuit and a reception circuit. Enables self-diagnosis by optical loopback of the transceiver circuit. In addition, the reliability of data acquired and analyzed by the system is improved by autonomously detecting and quickly visualizing anomalies in a large-scale data collection system.

  INDUSTRIAL APPLICABILITY The present invention is useful as a business microscope system that acquires face-to-face communication data between persons, visualizes and diagnoses the state of an organization, and particularly as a data collection system that collects data from sensors in such a system.

TR ... Name tag type sensor node GW ... Base station SS ... Sensor network server TS ... NTP server AS ... Application server DS ... Diagnostic server AM ... Management system CS ... Client AB, TRIR ... Infrared transmitter / receiver LED ... LED lamp ACC ... Acceleration sensor THM ... temperature sensor SP ... speaker CRD ... cradle CRDIF ... cradle interface CPU ... central processing unit MPU ... microcomputer SIO ... serial interface PIO ... general input port BTN ... button BCNIR ... infrared transmitter BCNCNT ... infrared transmitter control unit IRTSW ... transmitter circuit Switch IRRSW of the reception circuit IRTE transmission enable signal IRRE reception enable signal IRPD power down signal SDG self-diagnostic unit

Claims (15)

A sensor data collection system comprising a plurality of terminals equipped with sensors and a server for collecting data from the terminals,
The terminal includes a plurality of modules including an infrared transmitter and an infrared receiver, and a self-diagnosis unit that selectively turns on and off each of the infrared transmitter and the infrared receiver.
The self-diagnosis unit performs self-diagnosis of the infrared transmitter and the infrared receiver by receiving data transmitted from the infrared transmitter of one module by the infrared receiver of another module. To control,
A sensor data collection system characterized by that. The sensor data collection system according to claim 1,
The terminal is mounted, and includes a charger for charging the terminal,
The self-diagnosis unit of the terminal starts the self-diagnosis triggered by the terminal being attached to the charger.
A sensor data collection system characterized by that. The sensor data collection system according to claim 1,
The terminal is mounted, and includes a charger for charging the terminal,
The charger includes an interface that receives data of the sensor stored in the terminal and transmits the data to the server when the terminal is attached to the charger.
A sensor data collection system characterized by that. The sensor data collection system according to claim 1,
The self-diagnosis unit controls selective on / off by generating a transmission enable signal and a power-down signal for the infrared transmitter and the infrared receiver, respectively.
A sensor data collection system characterized by that. A sensor data collection system comprising a plurality of terminals equipped with sensors and a server for collecting data from the terminals,
Each of the terminals comprises an infrared transceiver,
The terminals communicate with each other by the infrared transceiver,
The server detects an anomaly occurring in the system based on the data;
A sensor data collection system characterized by that. The sensor data collection system according to claim 5,
It is further equipped with a stationary infrared transmitter,
The terminal detects its position by performing infrared communication with the stationary infrared transmitter,
A sensor data collection system characterized by that. The sensor data collection system according to claim 6,
The terminal receives battery level information of the stationary infrared transmitter by communicating with the stationary infrared transmitter,
The server detects a battery replacement time of the stationary infrared transmitter based on the battery remaining amount information.
A data collection system characterized by that. The sensor data collection system according to claim 5,
The terminal further includes a wireless transmission unit,
The terminal transmits the data to the server via the wireless transmission unit;
A data collection system characterized by that. The sensor data collection system according to claim 7,
The terminal further includes a wireless transmission unit,
Transmitting the battery remaining amount information to the server via the wireless transmission unit;
A data collection system characterized by that. The sensor data collection system according to claim 5,
The terminal is mounted, and includes a charger for charging the terminal,
The charger includes a terminal interface and a network interface,
When the terminal is attached to the charger, the charger receives the sensor data stored in the terminal via the terminal interface, and transmits the data to the server via the network interface. Send,
A sensor data collection system characterized by that. A sensor data collection system comprising a plurality of terminals equipped with sensors and a server for collecting data from the terminals,
The terminal periodically transmits data to the server, the server diagnoses the integrity of the data by the number of the received data, and detects an abnormality in the system that collects data.
A data collection system characterized by that. The sensor data collection system according to claim 11,
The terminal is mounted, further comprising a charger for charging the terminal,
The terminal and the charger each include an acceleration sensor,
When the terminal is attached to the charger and charging, the data of the acceleration sensor of the other terminal being charged by the charger, or the data of the acceleration sensor of the charger, and its own Comparing the data acquired by the acceleration sensor to calibrate its own acceleration sensor,
A data collection system characterized by that. The sensor data collection system according to claim 11,
The terminal is mounted, further comprising a charger for charging the terminal,
Each of the terminal and the charger includes a temperature sensor,
When the terminal is attached to the charger and charging, the data of the temperature sensor of the other terminal being charged by the other charger, or the data of the temperature sensor of the charger, By comparing the data acquired by the temperature sensor, the temperature sensor is calibrated.
A data collection system characterized by that. The sensor data collection system according to claim 11,
The terminal is mounted, further comprising a charger for charging the terminal,
The charger communicates the data with the attached terminal, transmits the data to the server,
The server confirms normal operation of the terminal and the charger based on the received data.
A data collection system characterized by that. The sensor data collection system according to claim 14,
The charger includes a terminal interface and a network interface,
The charger receives the data via the terminal interface and transmits the data to the server via the network interface;
A sensor data collection system characterized by that.

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