Methods and apparatus for security device portal sensing
First Claim
1. A security device for detecting that detects movement of a provided portal cover, the security device comprising:
- a sensor that provides indicia of a magnitude of a magnetic flux through the sensor;
a magnet that provides the magnetic flux through the sensor; and
a processor that receives the indicia of the magnitude of the magnetic flux and detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and an upper boundary and a lower boundary of a second threshold;
wherein;
the sensor does not move with respect to the magnet;
movement of the sensor and with respect to at least one of the portal cover and a portal changes the magnitude of the magnetic flux through the sensor;
the processor determines an average value of a series of values of the indicia of the magnitude of the magnetic flux that fall within the upper boundary and the lower boundary of the first threshold; and
the upper boundary and the lower boundary of the first threshold and the second threshold respectively are set in accordance with the average value.
3 Assignments
0 Petitions
Accused Products
Abstract
A security device, according to various aspects of the present invention, detects movement of a provided portal cover. The security device includes a sensor, a bias magnet, and a processor. The sensor provides indicia of a magnitude of a magnetic flux through the sensor. The bias magnet provides the magnetic flux through the sensor. The processor detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and a second threshold respectively. The sensor does not move with respect to the magnet. Movement between the sensor and the portal cover changes the magnitude of the magnetic flux through the sensor. The processor determines an average value of a series of values of the indicia of the magnitude of the magnetic flux that fall within the upper boundary and the lower boundary of the first threshold. The upper boundary and the lower boundary of the first threshold and the second threshold respectively are set in accordance with the average value.
61 Citations
22 Claims
-
1. A security device for detecting that detects movement of a provided portal cover, the security device comprising:
-
a sensor that provides indicia of a magnitude of a magnetic flux through the sensor; a magnet that provides the magnetic flux through the sensor; and a processor that receives the indicia of the magnitude of the magnetic flux and detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and an upper boundary and a lower boundary of a second threshold;
wherein;the sensor does not move with respect to the magnet; movement of the sensor and with respect to at least one of the portal cover and a portal changes the magnitude of the magnetic flux through the sensor; the processor determines an average value of a series of values of the indicia of the magnitude of the magnetic flux that fall within the upper boundary and the lower boundary of the first threshold; and the upper boundary and the lower boundary of the first threshold and the second threshold respectively are set in accordance with the average value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method performed by a security device for detecting movement of a portal cover, the method comprising:
-
averaging a series of values of indicia of a magnitude of a magnetic flux through a sensor that fall within an upper and a lower boundary of a first threshold to provide an average value; detecting indicia of the magnitude of the magnetic flux that falls outside an upper and a lower boundary of a second threshold; and adjusting the upper and the lower boundary of the first threshold and the second threshold respectively in accordance with the average value;
wherein;a magnet couples to a body of the security device to provide the magnetic flux through the sensor; the sensor couples to the body; the sensor does not move with respect to the magnet; movement of the sensor with respect to at least one of the portal cover and the portal changes the magnitude of the magnetic flux through the sensor. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. A security device for detecting movement of a provided portal cover, the security device comprising:
-
a sensor that provides indicia of a magnitude of a magnetic flux through the sensor; a magnet that provides the magnetic flux through the sensor; and a processor that receives the indicia of the magnitude of the magnetic flux and detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and an upper boundary and a lower boundary of a second threshold;
wherein;the sensor does not move with respect to the magnet; and movement of the sensor with respect to at least one of the portal cover and a portal changes the magnitude of the magnetic flux through the sensor.
-
-
21. A security device for detecting movement of a provided portal cover, the security device comprising:
-
a sensor that provides indicia of a magnitude of a magnetic flux through the sensor; a magnet that provides the magnetic flux through the sensor; and a processor that detects a change in the magnitude of the magnetic flux outside an upper boundary and a lower boundary of a first threshold and an upper boundary and a lower boundary of a second threshold;
wherein;the sensor does not move with respect to the magnet; and movement of the sensor with respect to at least one of the portal cover and a provided portal changes the magnitude of the magnetic flux through the sensor.
-
-
22. A security device for detecting movement of a provided portal cover, the security device comprising:
-
a body; a sensor that provides indicia of a magnitude of a magnetic flux through the sensor; a magnet that provides the magnetic flux through the sensor; and a processor that detects a change in the magnitude of the magnetic flux;
wherein;the sensor couples to the body; the magnet couples to the body; the sensor does not move with respect to the magnet; and movement of the sensor with respect to at least one of the portal cover and a provided portal changes the magnitude of the magnetic flux through the sensor.
-
Specification