Back to results
US 10,593,170 B2Granted
Door/window magnetic sensing device and method of installing
AssigneeRobert Bosch GmbH
InventorWilliam DiPoala
Life of this patent
Estimating the term…
Abstract
A door/window magnetic sensing device includes a housing, a magnetic sensor disposed in the housing and configured to sense signal strength of a magnet and output a signal strength value, and a controller for receiving a signal strength value from the magnetic sensor. The controller is configured to compare the signal strength value to an alarm threshold value and output one of a normal state signal and an alarm state signal. Further, a tamper state is detected from the approach of a second magnet. An indicator assists in mounting the door/window magnetic sensing device and mounting a magnet assembly.
Claims16
A door/window magnetic sensing device comprising:
- a magnetic sensor configured to sense signal strength of a magnet and output a signal strength value,
- a wireless transmitter circuit, and
- a controller for receiving the signal strength value from the magnetic sensor, the controller configured to determine an alarm state, a normal state, and a tamper state from the signal strength value,
- wherein the controller is configured to control the wireless transmitter circuit to output a normal state wireless signal when the signal strength value is either above an alarm threshold value or below the alarm threshold value depending on orientation of a magnet that is sensed thereby,
- wherein the controller is configured to determine when the signal strength value is continuously above an upper tamper state threshold and when the signal strength value is continuously below a lower tamper state threshold for a predetermined time period, and
- wherein the controller configured to control the wireless transmitter circuit to output a tamper state wireless signal when the signal strength value is either continuously above the upper tamper state threshold or continuously below the lower tamper state threshold for the predetermined time period.
3 more elements
A door/window magnetic sensing device comprising:
- a housing,
- a magnetic sensor disposed in the housing and configured to sense signal strength of a magnet and output a signal strength value,
- and
- a controller for receiving the signal strength value from the magnetic sensor, the controller configured to:
- compare the signal strength value to an alarm threshold value and output one of a normal state signal and an alarm state signal,
- store the signal strength value provided by the magnetic sensor when a magnet is present corresponding to a closed door or closed window for at least a preselected number of occurrences, the controller processing the stored signal strength values to determine an average operational signal strength value, and
- adjust an upper tamper state threshold and a lower tamper state threshold based on the average operational signal strength value.
4 more elements
Method for installing a door/window magnetic sensing device and a magnet assembly for a door sensing arrangement comprising the steps of:
- mounting one of the magnet assembly and the door/window magnetic sensing device to a door or a door frame;
- mounting the other of the magnet assembly and the door/window magnetic sensing device to the other of the door or the door frame by:
- providing an indication that the magnet assembly and the door/window magnetic sensing device are too far apart to perform door sensing;
- providing an indication that the magnet is being detected by a magnetic sensor of the door/window magnetic sensing device as one of the magnet assembly and the door/window magnetic sensing device approaches the other of the magnet assembly and the door/window magnetic sensing device;
- providing an indication that the door/window magnetic sensing device is approaching or moving away from the magnet assembly corresponding to an increase or decrease in a signal strength of the magnet sensed by the magnetic sensor;
- and
- indicating that the magnet and the magnetic sensor are moved to a position that corresponds to the door/window magnetic sensing device and the magnet assembly being in a closed or shut position and the signal strength of the magnet sensed by the magnetic sensor exceeds a signal strength margin,
- and
- securing the approaching one of the magnet assembly and the door/window magnetic sensing device to the other of the door and the door frame at the position wherein the magnetic sensor detects the signal strength of the magnet that exceeds the signal strength margin,
- wherein the indicator provides an indication that the magnet is being detected by the magnetic sensor as one of the magnet assembly and the door/window magnetic sensing device is approaching the other of the magnet assembly and the door/window magnetic sensing device in response to an increase in the signal strength of the magnet sensed by the magnetic sensor causing flashing of the indicator, the rate of flashing increasing as the magnetic sensor and the magnet approach each other, and
- wherein a controller is configured to stop the indicator from illuminating when the magnetic sensor detects that the signal strength of the magnet exceeds the signal strength margin.
8 more elements
Dependencies are inferred from the claim text.