TIME CORRECTION DEVICE, SENSOR DEVICE, SENSOR SYSTEM, TIME CORRECTION METHOD AND PROGRAM

• Main Authors: KURATA SHIGETO, IMAE MASATO, FUJII YASUHISA, MIYAMOTO YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2018
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRONIC TIME-PIECES; HOROLOGY; PHYSICS

PROBLEM TO BE SOLVED: To provide a time correction device and the like that can correct time with high accuracy without acquiring time information from an external.SOLUTION: A sensor device 10 to which a commercial AC power source is supplied from a power reception facility 50 is configured to measure a time difference in the same phase between a power source signal having the commercial AC power source stepped down and a clock signal having an oscillation signal of a crystal oscillator divided to transmit the measured time difference together with sensor detection data. A time correction device 30 to which the commercial AC power source is supplied from the same power reception facility 50 is configured to measure the time difference in the same phase between the power source signal and the clock signal having the oscillation signal of the crystal oscillator divided, and compare the measured time difference with the time difference received from the sensor device 10. A time difference in a time based on the oscillation signals of the crystal oscillators of the sensor device 10 and the time correction device 30 is calculated based on respective time differences, and a sensor detection time of the sensor device 10 is corrected based on the calculated time difference.SELECTED DRAWING: Figure 1 【課題】外部から時刻情報を取得することなく、高精度に時刻を補正することが可能な時刻補正装置等を提供する。【解決手段】受電設備５０から商用交流電源が供給されるセンサ装置１０は、商用交流電源を降圧した電源信号と水晶発振器の発振信号を分周したクロック信号の、同位相の時間差を計測しセンサ検出データと共に送信する。同一の受電設備５０から商用交流電源が供給される時刻補正装置３０は、電源信号と水晶発振器の発振信号を分周したクロック信号の、同位相の時間差を計測し、センサ装置１０から受信した時間差と比較する。それぞれの時間差に基づいてセンサ装置１０と時刻補正装置３０の水晶発振器の発振信号に基づく時刻の時刻差を算出し、当該時刻差分、センサ装置１０のセンサ検出時刻を補正する。【選択図】図１