Building facility vibration measurement device and management system

A building facility vibration measurement device configured to measure vibration of a building facility, the building facility vibration measurement device comprising:

• an acceleration detector configured to detect acceleration;
• and
• a processing circuit configured to:
• collect the acceleration detected by the acceleration detector;
• calculate a variance of the collected acceleration from information on the acceleration collected in a state where the acceleration detector is at a standstill so as to detect gravitational acceleration;
• collect the detected acceleration which is detected by the acceleration detector in the state where the acceleration detector is at the standstill so as to cause an axial direction of the acceleration detector in measuring a tension of a rope of an elevator, to be aligned with a direction of gravitational acceleration, the elevator serving as the building facility;
• and
• based on the calculated variance, judge whether the building facility vibration measurement device is allowed to use in measuring the tension of the rope,
• wherein, responsive to judging that the building facility vibration measurement device is allowed to use, the processing circuit is configured to measure the tension of the rope of the elevator using the building facility vibration measurement device.

A building facility vibration measurement device configured to measure vibration of a building facility, the building facility vibration measurement device comprising:

• an acceleration detector configured to detect acceleration;
• and
• a processing circuit configured to:
• collect the acceleration detected by the acceleration detector;
• collect the acceleration a plurality of number of times, the acceleration being detected by the acceleration detector in a state where the acceleration detector is at a standstill so as to cause an axial direction of the acceleration detector in measuring a tension of a rope of an elevator, to be aligned with a direction of gravitational acceleration, the elevator serving as the building facility;
• calculate an average value of the collected acceleration for each time and a maximum value of an absolute difference between average values for each time;
• and
• based on the calculated maximum value, judge whether the building facility vibration measurement device is allowed to use in measuring the tension of the rope,
• wherein, responsive to judging that the building facility vibration measurement device is allowed to use, the processing circuit is configured to measure the tension of the rope of the elevator using the building facility vibration measurement device.