Operation verification at low frequency 0.04 by AIST* has proven that HM-0013 can detect the long-ground motion accurately.
*AIST: National Institute of Advanced Industrial Science and Technology.

Because microtremor down of 0.1 gal is measurable, it is also used for evaluation of floor vibration in addition to earthquake monitoring

• Data save memory for power failure

  Recording for seismic motion must survive even on blackout. To meet this requirement, HM-0013 carries the memory with no limitation on writing time number which won’ t be lost in power failure.

  

• RS485 Modbus communication

  In case of HM-0013 connected in series, being supplied power provided by the host, up to 4 pcs connection within total 80 m is possible. By using power junction box between connections, it can extend the cable length and increase the number of connecting units. Even if the specially prepared host is not available, you can establish your system as you like refering the data map provided by IMV.

  

• Synchronization designated line

  Synchronization in multi-point measurement is very important and HM-0013 is designed for those analysis is easily carried out. Complete synchronization is possible since the each unit secures designated line for synchronization. Synchronization for all measured data is secured with simultaneous AD conversion in each axis.

• Self-check function

  Operation check from HM-0013 internal sensor to output function. For example, it checks if the unit is correctly operated from remote place once in a day

• Host loss recovery function

  After the condition is set and the measurement starts, even the connection to the host is shut down, single unit of HM-0013 continues the normal operation as long as the power is secured.

• Thin dedicated cable

  Can be operated with external diameter 5 mm cable (φ5). Easy installation with smaller restriction (connector φ13)

• Protection grade IP67

  It is designed with a waterproof and dustproof protection and can be used outside safely.

  

• Impact resistance 1000G

  Having the high level impact resistance.
  The robust structure drastically reduce break accident in installation construction.

  

• Compact

  Size has been significantly scaled down compared to a servo type acceleration sensor which had been generally used as a low frequency vibration measurement. Flexibility at installation site is improved.

  

• CE marking

  High security and noise resistance has passed Europe standard.

  

Connection cable length

By using Power Junction Box RP-0013, technically speaking, there is no limitation for cable length. Please contact us for length and system quantity. When the number of unit increase, it may limit some part of functions.

Joint study with Prof. Kawai from Osaka City University to conduct health monitoring of bridge. It is adopted as one of them in SIP (strategic innovation creation program) by Ministry of Land, Infrastructure, Transport and Tourism

Research content

To measure vibration or inclination of a bridge pier, understand the condition of score at lower part of foundation work.

*Scouring can be defined as a process due to which the particles of the soil or rock around the periphery of the abutment or pier of the highway bridge spanning over a water body, gets eroded. It may cause overturning of bridge pier or dike break, so need to be monitored by an inspector when it is big rain.

Measurement scene　Vibration monitoring at Yoshino river in Shikoku area

This study is conducted by “SIP infrastructure management and technology” Council for Science, Technology and Innovation.

Research content

Kumamoto great earthquake occurred in April 16th, 2016 was detected at IMV headquarter building. Taking advantage of high performance of HM-0013, the function which can smoothly evaluate postearthquake damage is now developed.

This measurement is carried with Osaka city innovation creation support subsidy. Development of structure monitoring system

• Seismic intensity distribution map

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• Seismic intensity display

  

• Post earthquake damage evaluation

  

• Displacement path

  

• Joint research

  Tokyo Denki University, Executive vise president Mr. Satoshi Fujita
  Nara Women’s University Faculty of Human Life and Environment, Mr. Atsuo Takino