Abstract: A microprocessor unit (MPU) connected to external sensors is provided with an interface unit that acquires detection information acquired by the external sensors and a digital signal processor (DSP) that estimates the state of a target object on the basis of the detection information acquired by the interface part and generates state information. The DSP is provided with a SIMD type arithmetic processing circuitry that processes a plurality of information with one command and is provided with single precision floating point computing units. The interface part outputs the state information generated by the DSP to an externally provided main processor. Therefore, power consumption can be reduced.

Abstract: In a lost child search system including a parent terminal and a child terminal, the child terminal is provided with: a gyro sensor that measures the angular velocity for identifying the posture of that child terminal; an acceleration sensor that measures the acceleration of that child terminal; a positioning control unit that performs relative positioning of that child terminal based on the identified posture and the measured acceleration; a communication unit that performs data communication via near-field wireless communication using radio waves; an intensity detection unit that detects the radio wave intensity in the near-field wireless communication with the parent terminal; and an intensity decision unit that decides whether or not search for the child terminal is necessary in accordance with the detected intensity information. The acceleration sensor is made to start measuring the acceleration in accordance with the decision result (decision information) by the intensity decision unit.

Abstract: A microprocessor unit (MPU) connected to external sensors is provided with an interface unit that acquires detection information acquired by the external sensors and a digital signal processor (DSP) that estimates the state of a target object on the basis of the detection information acquired by the interface part and generates state information. The DSP is provided with a SIMD type arithmetic processing circuitry that processes a plurality of information with one command and is provided with single precision floating point computing units. The interface part outputs the state information generated by the DSP to an externally provided main processor. Therefore, power consumption can be reduced.

Abstract: In a lost child search system including a parent terminal and a child terminal, the child terminal is provided with: a gyro sensor that measures the angular velocity for identifying the posture of that child terminal; an acceleration sensor that measures the acceleration of that child terminal; a positioning control unit that performs relative positioning of that child terminal based on the identified posture and the measured acceleration; a communication unit that performs data communication via near-field wireless communication using radio waves; an intensity detection unit that detects the radio wave intensity in the near-field wireless communication with the parent terminal; and an intensity decision unit that decides whether or not search for the child terminal is necessary in accordance with the detected intensity information. The acceleration sensor is made to start measuring the acceleration in accordance with the decision result (decision information) by the intensity decision unit.

Abstract: A pedestrian observation system includes a circuitry acquires an acceleration in accordance with a uniquely defined terminal coordinate system accompanying a pedestrian; obtains a power of an acceleration in a horizontal plane containing mutually perpendicular first and second directions based on acceleration components in the first and second directions, thereby acquiring an observation time of a maximum value of the power and acceleration components in the first and second directions at that time to acquire horizontal peak information; acquires times of observation of maximum and minimum values of a vertical acceleration component to acquire vertical peak information; chooses information on the maximum value of the power from the horizontal peak information based on the vertical peak information to acquire peak information for estimation; and acquires traveling direction information indicating a direction of travel of a pedestrian based on the peak information for estimation.

Abstract: A pedestrian observation system includes a circuitry acquires an acceleration in accordance with a uniquely defined terminal coordinate system accompanying a pedestrian; obtains a power of an acceleration in a horizontal plane containing mutually perpendicular first and second directions based on acceleration components in the first and second directions, thereby acquiring an observation time of a maximum value of the power and acceleration components in the first and second directions at that time to acquire horizontal peak information; acquires times of observation of maximum and minimum values of a vertical acceleration component to acquire vertical peak information; chooses information on the maximum value of the power from the horizontal peak information based on the vertical peak information to acquire peak information for estimation; and acquires traveling direction information indicating a direction of travel of a pedestrian based on the peak information for estimation.