Title:
無線端末を備えるシステム
Document Type and Number:
Japanese Patent JP7045179
Kind Code:
B2
Abstract:
To provide a wireless terminal that consumes low power and can prevent the lifetime from being shortened.SOLUTION: A wireless terminal MT_0_0 comprises an electric double layer capacitor (EDLC) 300, a switch 301 that charges the EDLC, a DC/DC conversion circuit 302 that supplies voltage charged in the EDLC to a sensor modular SENMOD, and a processor M_MCU connected to the switch and the EDLC to control the switch in accordance with a wireless instruction. The processor includes a first mode of monitoring a holding voltage of the EDLC and controlling the switch so as to maintain the holding voltage of the EDLC in a first voltage range and a second mode of controlling the switch so as to make the holding voltage of the EDLC have a value lower than the first voltage range, and the first mode and the second mode are designated by a wireless instruction.SELECTED DRAWING: Figure 1
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Inventors:
Tsukasa Fujimori
Degawa Sori
Degawa Sori
Application Number:
JP2017239948A
Publication Date:
March 31, 2022
Filing Date:
December 14, 2017
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H02J7/34; H02J1/00; H02J7/00; H04B1/3883
Domestic Patent References:
| JP2008148124A | ||||
| JP2009171694A | ||||
| JP2008017613A | ||||
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| JP2008092768A | ||||
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Foreign References:
| US20090179613 | ||||
| US20020044637 | ||||
| KR20020033419A |
Attorney, Agent or Firm:
Tsutsui International Patent Office
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