Salunda Limited

Grant Nicholls

John Mark Newton

Andrew Henry John Larkins

Alan Patrick John Finlay

Mathew William Davis

John Wilson

Philip Samuel Pickles

A safety sensing system implements a method for a person in an industrial environment comprises providing a personnel locator device () for location on a person and a reference system comprising a plurality of nodes () located at predetermined locations in the industrial environment (). Radio ranging signals are transmitted between the nodes () and the personnel locator device () and measurements of times of flight of the radio ranging signals are derived. The location of the personnel locator device () is calculated based on the measurements of the times of flight of the radio ranging signals and reference information representing the predetermined locations of the nodes (). It is determined if the calculated location of the personnel locator device () is within one or more danger zones in the industrial environment () and a warning signal is output in response thereto.

Personnel safety sensing

A sensor unit mountable on a rotatable element on a platform that is itself movable, and includes an orientation sensor arranged to take measurements that are dependent on the orientation of the sensor unit, a processor arranged to derive a rotational position signal representing the orientation of the rotatable element from the measurements, and a buffer arranged to buffer a series of recent measurements taken by the orientation sensor over a predetermined period of time. The processor derives the rotational position signal making a correction to compensate for the effect of the motion of the platform on the measurements on the basis of the overall series of measurements buffered in the buffer.

Sensor for a rotatable element

A wireless network comprises nodes, including routers having a tree-shaped communication topology and end devices, communicate in accordance a network protocol, wherein the routers transmit beacons in respective timeslots within a periodic beaconing interval, passively scan for messages, and, in response to receiving a message, transmit an acknowledgement thereof the received message. An end device that has a message that is pending transmission, passively scans for beacons transmitted from any router; and in response thereto, transmits the message, and passively scans for an acknowledgement, repeating those steps if no acknowledgement is received. This provides responsivity in an environment having rapidly changing propagation paths. To reduce power consumption, the end devices do not passively scan for beacons except when they have a message that is pending transmission, and also at predetermined times for reception of a downstream message. When radio silence is required, the routers do not transmit beacons.

Beaconed wireless network

A sensor unit for a fingerboard latch assembly comprising a latch bracket and a latch rotatably mounted on the latch bracket comprises a sensor arranged to sense the orientation of the latch and a wireless, optical or other communication unit arranged to communicate the orientation of the latch sensed by the sensor. The sensor unit may be mountable on the latch and comprise an orientation sensor arranged to take measurements that are dependent on the orientation of the sensor unit, and a processor arranged to derive an orientation signal representing the orientation of the latch from the measurements, the communication unit being arranged to communicate the orientation signal. A monitoring system receives the sensed orientations from plural sensor units.

Growing community of inventors

Romsey, United Kingdom

Grant Nicholls