Measurement instrument, measurement method, measurement system, and program

Abstract

An acquisition unit acquires at least one of the vertical-direction acceleration and the width-direction acceleration of a surface of a structure on which a moving object moves from an acceleration sensor provided in the structure on which the moving object moves. An analysis unit analyzes the motion of the moving object moving on the structure on the basis of at least one of the vertical-direction acceleration and the width-direction acceleration.

What is claimed is: 
     
         1 . A measurement instrument comprising:
 an acquisition unit that acquires width-direction acceleration of a surface of a structure on which a moving object moves from an acceleration sensor provided in the structure on which the moving object moves; and   an analysis unit that analyzes motion of the moving object moving on the structure on the basis of the width-direction acceleration.   
     
     
         2 . The measurement instrument according to  claim 1 ,
 wherein the acceleration sensor is provided in an end portion of the structure which is parallel to a regulation direction of a moving direction regulation unit for the moving object which is provided in the structure and in a central portion of the end portion in the regulation direction.   
     
     
         3 . The measurement instrument according to  claim 1 ,
 wherein the acquisition unit has a displacement computation unit that acquires vertical-direction acceleration of the surface of the structure on which the moving object moves and computes vertical-direction displacement of the structure on the basis of the vertical-direction acceleration, and   the analysis unit computes a passing duration of the moving object moving on the structure on the basis of the vertical-direction displacement.   
     
     
         4 . The measurement instrument according to  claim 3 ,
 wherein the analysis unit computes a passing duration of the moving object on the basis of the wave amplitude of the vertical-direction displacement generated due to movement of the moving object on the structure.   
     
     
         5 . The measurement instrument according to  claim 4 ,
 wherein the analysis unit divides the wave amplitude into multiple sections and computes the passing duration of the moving object moving on the structure which corresponds to each of the sections.   
     
     
         6 . The measurement instrument according to  claim 1 ,
 wherein the acquisition unit has a displacement computation unit which acquires the vertical-direction acceleration of the surface of the structure on which the moving object moves and computes the vertical-direction displacement of the structure on the basis of the vertical-direction acceleration, and   the analysis unit determines stoppage of the moving object on the structure on the basis of the width-direction acceleration and the vertical-direction displacement.   
     
     
         7 . The measurement instrument according to  claim 6 ,
 wherein the analysis unit determines stoppage of the moving object on the structure on the basis of a wave amplitude of the width-direction acceleration generated due to movement of the moving object on the structure and a wave amplitude of the vertical-direction displacement generated due to movement of the moving object on the structure.   
     
     
         8 . The measurement instrument according to  claim 7 ,
 wherein the analysis unit determines stoppage of the moving object in a case in which the wave amplitude of the width-direction acceleration is larger by a predetermined value than the wave amplitude of the vertical-direction acceleration.   
     
     
         9 . The measurement instrument according to  claim 7 ,
 wherein the analysis unit computes a stoppage time of the moving object on the structure on the basis of a peak time of the vertical-direction displacement and a time at which the wave amplitude of the width-direction acceleration is terminated.   
     
     
         10 . The measurement instrument according to  claim 1 ,
 wherein the analysis unit determines path changes of the moving object on the structure on the basis of the width-direction acceleration.   
     
     
         11 . The measurement instrument according to  claim 10 ,
 wherein the analysis unit determines path changes of the moving object on the basis of a degree and a sign of a crest value of the width-direction acceleration.   
     
     
         12 . The measurement instrument according to  claim 1 ,
 wherein the analysis unit determines an entering direction of the moving object into the structure on the basis of the width-direction acceleration and an envelope curve of the width-direction acceleration.   
     
     
         13 . The measurement instrument according to  claim 12 ,
 wherein the analysis unit determines the entering direction of the moving object on the basis of the appearance time of the envelope curve with respect to the width-direction acceleration.   
     
     
         14 . The measurement instrument according to  claim 13 ,
 wherein the analysis unit determines the entering direction of the moving object on the basis of whether the envelope curve appears even before the width-direction acceleration appears or the envelope curve appears even after the width-direction acceleration does not appear any longer.   
     
     
         15 . The measurement instrument according to  claim 12 , further comprising:
 a filter unit that suppresses acceleration components which are included in the width-direction acceleration that is computed by the envelope curve and is generated due to movement of the moving object on the structure.   
     
     
         16 . The measurement instrument according to  claim 1 , further comprising:
 an acceleration waveform acquisition unit that acquires and stores characteristic information of waveforms of the width-direction acceleration.   
     
     
         17 . The measurement instrument according to  claim 1 ,
 wherein the acquisition unit has a displacement computation unit that acquires vertical-direction acceleration of a surface of the structure on which the moving object moves and computes vertical-direction displacement of the structure on the basis of the vertical-direction acceleration and a displacement waveform acquisition unit that acquires and stores characteristic information of waveforms of the vertical-direction displacement.   
     
     
         18 . The measurement instrument according to  claim 1 , further comprising:
 an output unit that outputs analysis results of motion of the moving object.   
     
     
         19 . The measurement instrument according to  claim 1 , further comprising:
 a filter unit that suppresses intrinsic resonance frequency components which are included in the width-direction acceleration and that the structure has.   
     
     
         20 . The measurement instrument according to  claim 1 ,
 wherein the structure is a bridge.   
     
     
         21 . The measurement instrument according to  claim 1 ,
 wherein the width-direction acceleration is a component of an acceleration of gravity due to a slope of the structure.   
     
     
         22 . The measurement instrument according to  claim 1 ,
 wherein the analysis unit computes a passing duration of the moving object moving on the structure on the basis of the width-direction acceleration.   
     
     
         23 . A measurement method comprising:
 acquiring width-direction acceleration from an acceleration sensor provided in a structure on which a moving object moves; and   analyzing motion of the moving object moving on the structure on the basis of the width-direction acceleration.   
     
     
         24 . A measurement system comprising:
 an acceleration sensor provided in a structure on which a moving object moves;   an acquisition unit that acquires width-direction acceleration that is output from the acceleration sensor; and   an analysis unit that analyzes motion of the moving object moving on the structure on the basis of the width-direction acceleration.   
     
     
         25 . A recording medium storing a program commanding a measurement instrument to execute a sequence, the sequence comprising:
 acquiring width-direction acceleration from an acceleration sensor provided in a structure on which a moving object moves; and   analyzing motion of the moving object moving on the structure on the basis of the width-direction acceleration.