Hitachi, Ltd.

Hitachi Seiko, Ltd.

Hitachi Advanced Systems Corporation

Fumitaka Otsu

Munetoshi Unuma

Hideki Inoue

Kazuo Watanabe

Yoshitaka Takahashi

Shigeru Kakumoto

Takeshi Horie

Masayasu Kato

Shinobu Satou

So Higuchi

A behavior of a walker is detected according to combination of detection of the walking behavior on a level and an altitude variation of the walker to more accurately detect the behavior of the walker. A burned calorie can be obtained according to the type of the walking behavior. An altitude variation can be obtained more accurately by integrating altitude variation only at sections with vertical movement during walking. A stride is estimated according to the behavior of the walker in consideration of the vertical movement. Obtained position and traveling direction are used for compensating values in inertial navigation system. The behavior with and without vertical movement is used in a walker navigator and a worker observing system including a worker terminal carried by the walker for detecting the behavior of the worker and a worker observing terminal for providing the detected position and behavior of the walker.

Walker behavior detection apparatus

A terminal apparatus of the present invention having a position detection unit and a display unit further includes a geographic information storage unit for storing three-dimensional terrain shape information, an attitude detection unit for detecting the attitude of the terminal apparatus, and an image creation unit for obtaining information on a vector vertical to the display unit based on information on the attitude obtained by the attitude detection unit and creating a three-dimensional terrain image at a viewpoint using a current position obtained by the position detection unit, information on a line-of-sight defined by the information on the vector, and the three-dimensional terrain shape information in the geographic information storage unit. When the attitude of the terminal apparatus is changed, the three-dimensional terrain image on the display unit is updated, following a change in the attitude of the terminal apparatus.

Navigation apparatus for displaying three-d stored terrain information based on position and attitude

In correspondence with the graphic data having a spatial extent, there is the address data table configured of arrays, the dimension of which are not smaller in number than the dimensions of the extent of the graphic data. Coordinate transformation is performed between the graphic data and the address data table, whereby any desired point on each figure can be brought into correspondence with one array number of the address data table. Those memory addresses of a graphic data table at which the individual graphic data items are sorted, are subsequently stored in the address data table. In case of searching for graphic data located at any desired position, the corresponding array number of the address data table is obtained on the basis of the position, whereupon the desired figure can be searched for through that memory address to the graphic data which is stored. In a case where the memory space of the address data table corresponding to any desired one of cells (each of which is a subspace of a graphic space) is full, relevant information of indirectly utilizing a memory space assigned to another of the cells is substitutionally stored in the address data table, conjointly with the memory address of the graphic data table storing the corresponding graphic data so that the address data table can be used efficiently. When the figure discriminators of the graphic data are stored in the address data, lines or points, the relevant attribute information items, or the like can be extracted selectively and efficiently by deciding the figure discriminators on the searching operation.

Graphic data searching and storage method

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Yachiyo, Japan

Fumitaka Otsu