摘要:
In a sensor network system comprising a sensor terminal and a management server, the sensor terminal transmits observation data acquired using the sensor, the management server has a latest data storage manager which manages the latest observation data among observation data received from the sensor terminal, a history data storage manager which manages the history of the observation data from any time when data was received from the sensor terminal to the latest observation data, and a missing data manager which manages missing history data, and compensates the missing history data based on a predetermined rule, and when a request for such observation data is received, at least one of the latest observation data managed by the latest data storage manager, and history data wherein the missing data has been compensated and managed by the history data storage manager, is output according to the type of request.
摘要:
A plural-data transmission Start message is transmitted prior to transmission of plural data to an intermittent operation type wireless communications terminal, and when transmission of plural data is completed, a plural-data transmission End message is transmitted. The terminal which received the plural-data transmission Start message can change over the sleep period of the aforesaid intermittent operation to a shorter sleep period. Thereby, an improvement in the response performance in the case of plural-data delivery can be simultaneously obtained while maintaining the low power performance of a sensor node.
摘要:
A transmit-side transmission control device for sending data generated by a data generator device to a data utilization point receives and retains notification of the allowable data transmission quantity from a receive-side transmission control device, and adjusts the data quantity sent from the data generator device so as to fit within that allowable data transmission quantity range, and/or when a request is issued to change that data transmission quantity, the receive-side transmission control device is notified of that allowable data transmission quantity change request. The receive-side transmission control device retains the respective allowable data transmission quantities for transmit-side transmission control device, and when a change request is issued, reallocates the allowable data transmission quantities for all transmit-side transmission control devices to fit within the data processing load range stored beforehand within the data utilization point, and notifies the corresponding transmit-side transmission control device of these reallocated allowable data transmission quantities.
摘要:
A sensor device wherein when a first sensor detects a detection object, the first sensor changes its output voltage level, and when the processor unit detects the change of the output voltage level of the first sensor as an interrupt signal, the drive voltage level of the first sensor is switched from the first signal level to the second signal level which is different from the first signal level and the drive voltage level of the second sensor is switched from the second signal level to the first signal level which is different from the second signal level.
摘要:
Provided is a method for transferring data of a sensor network system in which communication is made with multiple sensor nodes SN1s connected via a wireless network to transmit sensing data measured by the sensor nodes SN1s to a server SNS connected via a wired network. The method includes: receiving the sensing data from each of the sensor nodes SN1s (S1); adding meaning information that corresponds to a measurement value contained in the sensing data to the sensing data (S2, S5); and transmitting the sensing data to which the meaning information is added to the server SNS (S6). Accordingly, data of the sensor nodes are efficiently used by multiple applications while effectively using a reduced resource for wireless communication.
摘要:
A data retrieval method for sensing data for retrieving, from user terminals, data transmitted from a plurality of sensor nodes, the data retrieval method including: a step for storing in distributed servers the data sent from the plurality of sensor nodes, a step for setting information link pointers for indicating model names previously set and link pointers of data corresponding to the model names, a step for a management server connected through a network with the distributed servers and the user terminal to accept the reference requests for data acquired from the user terminals, and a step for the management server to acquire data from the distributed servers set as the information link pointers based on the data reference request from among the data stored in the distributed servers and to respond to the user terminal.
摘要:
In a sensor network system comprising a sensor terminal and a management server, the sensor terminal transmits observation data acquired using the sensor, the management server has a latest data storage manager which manages the latest observation data among observation data received from the sensor terminal, a history data storage manager which manages the history of the observation data from any time when data was received from the sensor terminal to the latest observation data, and a missing data manager which manages missing history data, and compensates the missing history data based on a predetermined rule, and when a request for such observation data is received, at least one of the latest observation data managed by the latest data storage manager, and history data wherein the missing data has been compensated and managed by the history data storage manager, is output according to the type of request.
摘要:
A network system including: a first sensor device which includes a first sensor unit which detects an action of a detection object; and a first transmission unit which transmits first data regarding the action and first identification information to a server via a first base station: a second sensor device which includes; a second sensor unit which obtains sensing data; and a second transmission unit which transmits second data including the sensing data and second identification information to the server via a second base station; wherein the server is configured to: associate the first and second data based on the detection of the action; to access predetermined normal data correlating data; and, detect an abnormal condition if a combination of the action detected via the first sensor unit and the sensing data obtained by the second sensor unit conflict with the correlated normal data.
摘要:
A sensor node may be used for another purpose for a moment and may also be replaced. By configuring, for a sensor node, a logic node which is provided with the physical node use information indicating whether or not the sensor node is in use and the logical node use information indicating whether or not the sensor node is provided as a logic node, a sensor node to be replaced may be specified based on the replacement request of the sensor node, a sensor node is selected which is configured as logic node providing the physical node use information indicating that the sensor node is not used and the logic node use information indicating that the sensor node is provided as the logic node, thus selected sensor node is identified as the replacing sensor node to achieve the replacement from the replaced sensor node to the replacing sensor node.
摘要:
A radio terminal device realizing reduced power consumption and prompt detection of detection object by using a first sensor and a second sensor whose ON/OFF states are opposite and whose operations are synchronized. When the first sensor detects a detection object, the first output voltage level is changed. When a processor detects the change of the output voltage level as an interrupt signal, the drive voltage level of the first sensor is switched to low and the drive voltage level of the second sensor is switched to high. Moreover, when the second sensor detects a detection object, the output voltage level of the second sensor is changed. When the processor detects the change of the output voltage level as an interrupt signal, the drive voltage level of the second sensor is switched to low and the drive voltage level of the first circuit is switched to high.