Motion analysis system and motion analysis method

摘要

A motion analysis system includes first to N-th (N is an integer of 2 or more) sensor units which is attached to an object, an analysis unit which obtains a plurality of items of sampling data output from the sensor units, to analyze a motion of the object, a synchronization signal sending unit which transmits a first synchronization signal group including N first synchronization signals in order from the first to the N-th sensor unit, and transmits a second synchronization signal group including N second synchronization signals in order from the N-th to the first sensor unit, with respect to sensor unit, and a reference synchronization signal generation unit which generates a reference synchronization signal which is to be a reference with respect to the first to N-th sensor units, based on the first and second synchronization signal groups received by sensor unit.

主权项

1. A motion analysis system for detecting a motion of an object, the system comprising:
first to N-th sensor units, wherein N is an integer equal to or larger than 2, each of the sensor units is attached to the object, each of the sensor units includes a communication unit that receives and transmits signals, a sensor that outputs sampling data, and a data processing unit that generates a plurality of sampling data items; and a host terminal that includes an analysis unit, a synchronization signal sending unit, and a reference synchronization signal generation unit, wherein: the synchronization signal sending unit transmits to the communication units of the first to N-th sensor units a first synchronization signal group including N first synchronization signals in order from the first sensor unit to the N-th sensor unit, and transmits a second synchronization signal group including N second synchronization signals in order from the N-th sensor unit to the first sensor unit, such that the synchronization signal sending unit transmits the second synchronization signal group for the first to N-th sensors units in reverse order when compared to a transmission of the first synchronization signal group, the plurality of sampling data items generated by the data processing unit includes sample data that is outputted from the sensor and sampled by the data processing unit in chronological order and includes a first and second synchronization flags, the first synchronization flag is associated with a first sampling data sampled at a time in which the communication unit receives the first synchronization signal and the second synchronization flag is associated with a second sampling data sampled at a time in which the communication unit receives the second synchronization signal, the data processing unit for a given sensor unit sets the first synchronization flag in response to the receipt of the first synchronization signal by the given sensor unit from the host terminal and sets the second synchronization flag in response to the receipt of the second synchronization signal by the given sensor unit, the communication unit transmits the sampling data items to the host terminal, the reference synchronization signal generation unit generates a reference synchronization signal which is to be a reference with respect to the first to N-th sensor units, the reference synchronization signal generation unit determines an intermediate time by equally dividing a reception interval extending between a reception time of the first synchronization signals and a reception time of the second synchronization signals received by the first to N-th sensor units, wherein the first synchronization flags provided in the sampling data items indicate the reception time of the first synchronization signals and the second synchronization flags provided in the sampling data items indicate the reception time of the second synchronization signals, the reference synchronization signal generation unit sets a reference synchronization flag at the intermediate time and the sampling data taken at the intermediate time is associated with the reference synchronization signal, and the analysis unit analyzes a motion of the object based on the sampling data items and the reference synchronization flag.