Abb Research Ltd.

Gassecure As

Dräger Safety Ag&co. Kgaa

Niels Aakvaag

Harald Vefling

Mogens Mathiesen

Knut Sandven

Gilles Thonet

Robert Martinez

Christoffer BEng Apneseth

Mogens Mathisen

Jonny Skaalvik

Anne E Vallestad

Kai Dipl-Ing Garrels

A wireless sensor network comprises at least one sensor unit which comprises a sensor for sensing a parameter and at least one interrogating node. The interrogating node is arranged to transmit an interrogation message periodically to said sensor unit and to receive a reply message from said sensor unit. The sensor unit is arranged to transmit said reply message after a predetermined deliberate delay unless the sensor unit determines that an alarm condition has been met, in which case the sensor unit is arranged to transmit said reply message before the end of the deliberate delay.

Wireless sensor networks

A method for designing an, at least partly wireless, local area communication network for industrial application. A 3D plant model of the area in which the communication network is to operate is accessed. Devices that are to communicate in the communication, identify and quantify potential sources of interference or attenuation of the communication signals are introduced into this model. Data regarding communication characteristics of the devices are included. Communication possibilities of the devices are tested and evalutated in the communication network taking into account the possible interference and attenuation sources. If communication possibilities of a particular device is inadequate, adjustments regarding that device are suggested.

Tool for communication system

A method for controlling an industrial automation device or process including a control unit, at least one actuator, and at least one device arranged for wireless communication with the control unit. The method determines characteristics of the wireless transmissions used to communicate sensor and/or actuator data to the control unit. The method, a system and a graphic interface enable a user to select a control strategy dependent on a value or values of the characteristics of the wireless communications.

Method for controlling an industrial automation device

Growing community of inventors

Oslo, Norway

Niels Aakvaag