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Sensor system, transmission terminal, time information processing device, and synchronization method

A technology of an information processing device and a sending terminal, which is applied in the field of sensor systems and can solve problems such as unstable clocks, reduced synchronization accuracy, and processing fluctuations.

Pending Publication Date: 2021-01-12
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the instability of the clock at the time of generation, transmission delay due to carrier sense, etc., retransmission due to packet errors, and CPU (Central Processing Unit, central processing unit) etc. receive congestion from other processing Under processing changes will occur
Therefore, there are cases where synchronization accuracy decreases

Method used

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  • Sensor system, transmission terminal, time information processing device, and synchronization method
  • Sensor system, transmission terminal, time information processing device, and synchronization method
  • Sensor system, transmission terminal, time information processing device, and synchronization method

Examples

Experimental program
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no. 1 Embodiment approach

[0036] figure 1 It is a diagram showing the system configuration of the sensor system 100 in the first embodiment. The sensor system 100 includes a sensor 10 , a transmission terminal 20 , and a collection device 30 . The sensor 10 and the transmitting terminal 20 are connected by wire. The transmitting terminal 20 and the collection device 30 are wirelessly connected via the network 40 . The network 40 is, for example, an ISM (Industrial, Scientific and Medical band, industrial, scientific and medical frequency band) network. The wireless connection between the transmitting terminal 20 and the collection device 30 is not necessarily limited to a wireless LAN, and any communication method may be used as long as wireless communication is possible. exist figure 1 In the figure, the sensor system 100 is shown as having one sensor 10 and the transmission terminal 20 , but the sensor system 100 may each include a plurality of sensors 10 and the transmission terminal 20 .

[00...

no. 2 Embodiment approach

[0111] In the second embodiment, a configuration in a case where the sensor system 100 described in the first embodiment is applied to position calibration of an elastic wave generation source will be described. That is, in the second embodiment, the occurrence of an event is the detection of an elastic wave.

[0112] Figure 16 It is a figure which shows the system structure of the sensor system 100a in 2nd Embodiment. The sensor system 100a includes a plurality of sensors 10-1 to 10-n (n is an integer greater than or equal to 3), a plurality of transmission terminals 20a-1 to 20a-n, a plurality of collection devices 30a-1 to 30a-n, and a server device 50 . The sensor 10-1 and the transmitting terminal 20a-1, the sensor 10-2 and the transmitting terminal 20a-2, and the sensor 10-n and the transmitting terminal 20a-n are connected by wire. Each of the plurality of transmitting terminals 20 a - 1 to 20 a - n is wirelessly connected to the collection device 30 a via the netwo...

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Abstract

Provided are a sensor system, a transmission terminal, a time information processing device, and a synchronization method capable of improving synchronization accuracy in a wireless network. A sensorsystem according to an embodiment includes a sensor, a transmission terminal, and a time information processing device. The transmission terminal includes an event signal generation unit, an event time determination unit, a communication time determination unit, and a communication unit. The event signal generation unit detects the occurrence of an event on the basis of the physical quantity detected by the sensor. The event time determination unit unit specifies a detection time of an event. The communication time unit specifies a transmission time when transmitting to the time information processing device. The communication unit transmits the time information to the time information processing device. The time information processing device includes a reception time determination unit unit and a time information processing unit. The reception time determination unit determines the reception time of the time information transmitted from the transmission terminal. The time informationprocessing unit performs processing based on a plurality of transmission times and a plurality of reception times.

Description

technical field [0001] Embodiments of the present invention relate to a sensor system, a transmitting terminal, a time information processing device, and a synchronization method. Background technique [0002] In recent years, various sensory data have been able to be collected due to the power saving and price reduction of sensors and the rapid development of networks. Therefore, the tendency to make use of the sensory data is active. As one of the utilization methods of sensing data, there is structure health monitoring. Structural health monitoring is a technology that senses physical quantities such as displacement, vibration, and pressure through sensors installed on structures such as bridges, and diagnoses damage and deterioration of structures through various signal processing methods. In a system that performs such monitoring, not only information from a single sensor is important, but mutual information between a plurality of sensors is also important, and it is ...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04L29/08
CPCH04J3/0638H04L67/12H04W56/001A61B5/0015A61B5/0008G16H40/63G16H40/67
Inventor 上田祐树
Owner KK TOSHIBA