Metrasens Limited

Mftrasens Limited

Qinetiq Limited

The Secretary of State for Business, Innovation & Skills

Thomas John Horton

Mark N Keene

Malcolm David Macleod

Paul Daniel Baxter

Sami Khan

Mark Nicholas Keene

A monitoring system for use in combination with, in particular a ferromagnetic, detection system of the kind that generates a warning signal to indicate a detection event when the detection system detects movement of a door protecting an entrance to a protected area. The monitoring system may include a processor configured to present information to a user to alert the user when the warning signal indicates a detection event; and a user interface configured to accept a user input in response to the presentation of the detection event that generates a user generated signal indicative of whether the detection event was the result of an unintentional action or an intentional action. The processor may be configured to automatically store data relating to the detection event in a memory unit when the user generated signals indicates that the detection event was the result of an unintentional action.

Monitoring system for a detection system

An apparatus for protecting an entrance to a protected area comprises a magnetic sensor to measure an ambient magnetic field or gradient within a first zone of sensitivity at a non-magnetic sensor means adapted to detect the presence of objects within a primary detection zone, a signal processing circuit arranged in communication with the magnetic sensor apparatus and nonmagnetic sensor apparatus, and a warning device operable by an output signal from the signal processing circuit, the warning device adapted to provide an alarm. The signal processing circuit identifies temporal variations due to the movement of a ferromagnetic object within the ambient magnetic field and correlates them with instances in which the non-magnetic sensor means detects the presence of an object in its detection zone, and causes the alarm to operate in the event that the correlation is indicative of the presence of a ferromagnetic object in the primary detection zone. It also determines the direction from which an object is approaching the using signals from the non-magnetic sensor means and modifies the operation of the warning device dependent on the direction.

Apparatus for detecting ferromagnetic objects at a protected doorway assembly

An apparatus for protecting an entrance to a protected area comprises a magnetic sensor to measure an ambient magnetic field or gradient within a first zone of sensitivity at a non-magnetic sensor means adapted to detect the presence of objects within a primary detection zone, a signal processing circuit arranged in communication with the magnetic sensor apparatus and non-magnetic sensor apparatus, and a warning device operable by an output signal from the signal processing circuit, the warning device adapted to provide an alarm. The signal processing circuit identifies temporal variations due to the movement of a ferromagnetic object within the ambient magnetic field and correlates them with instances in which the non-magnetic sensor means detects the presence of an object in its detection zone, and causes the alarm to operate in the event that the correlation is indicative of the presence of a ferromagnetic object in the primary detection zone. It also determines the direction from which an object is approaching the using signals from the non-magnetic sensor means and modifies the operation of the warning device dependent on the direction.

An apparatus for protecting an entrance to a protected area comprises a magnetic sensor to measure an ambient magnetic field or gradient within a first zone of sensitivity at a non-magnetic sensor means adapted to detect the presence of objects within a primary detection zone, a signal processing circuit arranged in communication with the magnetic sensor apparatus and nonmagnetic sensor apparatus, and a warning device operable by an output signal from the signal processing circuit, the warning device adapted to provide an alarm. The signal processing circuit identifies temporal variations due to the movement of a ferromagnetic object within the ambient magnetic field and correlates them with instances in which the non-magnetic sensor means detects the presence of an object in its detection zone, and causes the alarm to operate in the event that the correlation is indicative of the presence of a ferromagnetic object in the primary detection zone. It also determines the direction from which an object is approaching the using signals from the nonmagnetic sensor means and modifies the operation of the warning device dependent on the direction.

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Malvern, United Kingdom

Thomas John Horton