Data recording apparatus and data recording method

A data recording apparatus comprising:

• an observed data storage configured to sequentially store a value observed by a sensor in association with an observed time;
• a base line/auxiliary line storage configured to store a base line set on a plane coordinate system formed by a time axis and an axis representing a value of the sensor and first and second auxiliary lines provided on opposite sides with respect to the base line along the base line;
• an intersection processing unit
• configured to plot each observed value in the observed data storage on the plane coordinate system,
• configured to determine whether or not a line segment connecting between observed values at adjacent times intersects the first or second auxiliary line, and
• configured to specify one of two end points of the line segment, that belongs to a base region formed between the first and second auxiliary lines when the line segment intersects the first or second auxiliary line;
• an intersection data storage configured to store the point specified by the intersection processing unit;
• and
• a deleting unit configured to delete observed values subjected to a processing of the intersection processing unit from the observed data storage.

A data recording apparatus, comprising:

• an observed data storage configured to sequentially store data including values observed by a plurality of sensors in association with an observed time;
• an intersection processing unit
• configured to plot each data in the observed data storage on a space coordinate system formed by a time axis and axes representing values of the sensors
• configured to determine whether or not a line segment connecting between each data at adjacent times intersects a base plane preset on the space coordinate system and
• configured to calculate a intersection point of the line segment and the base plane when the line segment intersects the base plane;
• an intersection data storage configured to store an intersection point calculated by the intersection processing unit;
• and
• a deleting unit configured to delete data subjected to a processing of the intersection processing unit from the observed data storage.

A data recording method comprising:

• sequentially recording a value observed by a sensor in association with an observed time in an observed data storage;
• plotting each observed value in the observed data storage on a plane coordinate system formed by a time axis and an axis representing a value of the sensor,
• determining whether or not a line segment connecting between observed values at adjacent times intersects a base line preset on the plane coordinate system and
• calculating an intersection time of the line segment and the base line when the line segment intersects the base line;
• recording calculated intersection time in intersection data storage;
• and
• deleting observed values subjected to a processing of the determining or the calculating from the observed data storage.

A data recording method comprising:

• sequentially recording a value observed by a sensor in association with an observed time in an observed data storage;
• setting a base line on a plane coordinate system formed by a time axis and an axis representing a value of the sensor and first and second auxiliary lines on opposite sides with respect to the base line along the base line;
• plotting each observed value in the observed data storage on the plane coordinate system,
• determining whether or not a line segment connecting between observed values at adjacent times intersects the first or second auxiliary line, and
• specifying one of two end points of the line segment, that belongs to a base region formed between the first and second auxiliary lines when the line segment intersects the first or second auxiliary line;
• recording a specified point in an intersection data storage;
• and
• deleting observed values subjected to a processing of the determining or the specifying from the observed data storage.

A data recording method, comprising:

• sequentially recording data including values observed by a plurality of sensors in association with an observed time in an observed data storage;
• plotting each data in the observed data storage on a space coordinate system formed by a time axis and axes representing values of the sensors
• determining whether or not a line segment connecting between each data at adjacent times intersects a base plane preset on the space coordinate system and
• calculating a intersection point of the line segment and the base plane when the line segment intersects the base plane;
• recording a calculated intersection point in an intersection data storage;
• and
• deleting data subjected to a processing of the determining or the calculating from the observed data storage.