Hitachi, Ltd.

Yoshiki Ito

Tsunehiro Endo

Kenichi Morita

Tomokazu Murakami

Junichi Kimura

Kazuaki Tobari

Shigehisa Aoyagi

Hidefumi Shirahama

Keisuke Terada

An event analysis system capable of appropriately estimating a specific event is provided. Provided are an estimation unit that estimates a track of a person based on video data acquired by a camera, a determination unit that determines, based on determination information for determining a specific event, whether or not the track estimated by the estimation unit corresponds to the specific event, a filter unit that removes, based on normal event information for identifying a normal event, the normal event from the events that have been determined by the determination unit to correspond to the specific event, and an output unit that outputs information indicating that the event is occurring after the normal event has been removed by the filter unit.

Event analysis system and event analysis method

An efficient alert process is realized and effectiveness of surveillance is improved when surveilling various incidents that occur within a surveillance area. In a video surveillance system for detecting a plurality of incidents in a surveillance area using a video that captured the surveillance area, provided are a calculation unit which detects an image of a person and/or an object from the video, and calculates an incident feature quantity as a feature quantity representing a status of a detected person and/or a feature quantity of a detected object, and a determination unit which detects an occurrence of the incident based on the incident feature quantity, and determines subjects to be alerted of an occurred incident, which is a detected incident, from a type of the occurred incident and a determination accuracy of the occurred incident.

Video surveillance system and video surveillance method

A vector controller for a permanent magnet synchronous motor according to the present invention has a motor constant identifying unit for identifying motor constants of the permanent magnet synchronous motor, which is connected to an electric power converter in the vector controller, by using a second d-axis current command value, a second q-axis current command value, a detected output current of the electric power converter, and motor constant settings. The vector controller uses the motor constants identified by the motor constant identifying unit in vector control calculation so as to control the driving of the permanent magnet synchronous motor. Thereby, the vector controller achieves torque control with high accuracy and superior responsiveness.

Vector controller for permanent magnet synchronous motor

A voltage detector is connected to a connection terminal connected to one phase of an AC output of an inverter through a diode. A removable charge power supply is connected to said connection terminal and another connection terminal. A charge-power-supply connection judging circuit judges whether the charge power supply is or isn't connected, based on a charge power supply voltage detected by a voltage detector. A mode change control circuit outputs switch signal by the result of said judgment. By receiving this switch signal, the inverter controller switches the operation of the inverter between the Motor Drive mode or the Battery Charge mode. Thereby, a motor drive device detects a connecting status of an external charge power supply and steadily switches the operation of the inverter between the Motor Drive mode or the Battery Charge mode.

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Naka, Japan

Yoshiki Ito