BACKGROUND OF THE INVENTION
This invention is directed to the field of home security systems,
and more specifically relates to home security systems which monitor a number of
access points into the home.
Home security systems generally monitor all access points, such as
windows and doors, into a house. Figure 1 shows a typical floor plan of a house
10 having a security alarm system of the prior art. The security alarm system
included control panel 31, user panels 30A and 30B which were connected to the
control panel and sensors 25 which were also connected to the control panel (connections
not shown). One typical sensor is shown in Figure 3. A typical block diagram is
shown in Figure 2.
The floor plan indicates that house 10 has two primary spaces, rooms
11 and 12. In room 11, there are three doors 15A, B and C for entering and exiting
the room. In room 12, there is door 15D and windows 20A, B and C. Rooms 11 and
12 are separated by door 15E.
The security system was set up so that one user panel was in each
space and so that there was one sensor located at each door or window. The system
was armed using the user panels. Typically, a sensor produced a first signal if
the door or window was closed, and a second signal if the door or window was open.
The control panel would receive these signals, and if the system were armed, would
produce an alarm indication signal if the second signal was received.
In the past, a sensor was grouped with all sensors located within
a single space. Note that in Figure 1, sensors located in room 11 were assigned
to group 1, while sensors located in room 12 were assigned to group 2. To arm the
system, an operator would enter an arm command at one of the two user panels. Generally,
both groups of sensors could be armed from either user panel.
Still, it was occasionally desirable to arm some points in a space,
without arming others. It was also desirable to assign a point to more than one
group assigned to one and only one group, for arming purposes. Lastly, it was desirable
to have the system provide an indication when only a selected group of points was
SUMMARY OF THE INVENTION
The object of the present invention is defined by Claim 1. Thus the
present invention is a security control panel and security system which logically
groups sensors at access points as defined by an operator, not by geographic location.
The control panel includes an operator means which receives inputs from the sensors
and initiates an indication means if one of the sensors indicates that one of the
access control points is in an open state. The control panel includes a grouping
means, which groups sensors according to instructions entered by an operator.
Each point may be included in one or more groups.
When the inventive control panel is included in a security alarm
system, further enhancements are possible. One such enhancement is that alarms
can be armed for some points within a space, while leaving others unarmed. A further
enhancement is that an indication will be given only when a point in the selected
armed group is opened.
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 is a plan view of an typical house protected by a prior
art security alarm system.
Figure 2 is a block diagram of a prior art security system.
Figure 3 is a schematic diagram of an typical sensor of the prior
Figure 4 is a plan view of an typical house protected by the inventive
Figure 5 is a chart showing the logical grouping of points within
the house of Figure 4.
Figure 6 is a block diagram of the inventive control panel 31.
Figure 7 is a block diagram of a data entry panel of the inventive
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to Figure 4, there shown is a typical house having
the inventive security system and panel therein installed. Note that the house
is identical to the house shown in Figure 1, and that from this view the security
system is similar. However, none of the sensors 25 are noted as belonging to a
particular group. The basic functions of the alarm system are similar to that described
with reference to Figure 1.
Figure 6 depicts the fundamental difference between the present invention
and security systems of the prior art. Figure 6 is a block diagram of the presently
inventive control panel 31. The control panel includes memory 32, operations unit
33 grouping means 34 and input/output port 35.
Input/output port 35 is for translating the internal communications
of the control panel into a form which can be understood by the user panels. The
input/output port also translates the sensor signals and user panel signals into
a form which can be used by the control panel.
Operations means 33 executes commands stored in memory 32 to control
the operation of the security system. The operations means receives signals from
the input/output port, operates on those signals based on the stored instructions,
and then sends signals back through the input/output port for use by the rest of
the system. As an example, if one sensor changed states by the closing of switch
303, a signal would be sent to the control panel to indicate the switch closure.
The operations means would receive this information, and if the memory indicated
that the particular sensor was in an armed state, the memory would tell the operations
means would to initiate an alarm indication signal.
Grouping means 34 is in fact memory specifically existing for the
purpose of logical grouping of sensors. The physical memory device used may be
an EEPROM. The user enters groups of points, each group being associated with a
Mode identifier. Groups of sensors may be combined in the present system so that
the entry of the predefined modes will cause the arming and disarming of selected
Figure 5 shows one possible plan for the grouping of sensors in house
10. Mode A includes all sensors located within the house. It could arm all the
points, for example, when the house is to be left vacant.
Mode B includes only Doors 1 and 2. It may be activated, for example,
when the homeowner is not expecting any guests at the two armed doors, but wishes
to be able to freely enter and exit the house and to leave windows open for fresh
Mode C shows all of the windows being armed along with Doors 2 and
3. This mode may be used where the swimming pool 100 is to be the center of some
activity, and access through the house in a particular pattern is desired.
Conversely, mode D arms only Door 4. This could be used to prevent
children from leaving the house to play in the pool area.
Mode E arms only the sensors associated with the four doors. This
could be used for example at night when the house is occupied, but it is desirable
to have the windows open for ventilation.
Lastly, Mode F is used for complete disarming of the system. This
could be used when the house is occupied, access through any door is desirable
and opening the windows is desirable.
Figure 7 shows a user panel 30 of the present invention. User panel
30 includes data entry means 40, operational controller 41, memory 42, indicator
43, and input/output port 44.
Data entry means 40, which may be a keyboard, allows the user to
enter data and instructions into the system. The operational controller 41 in cooperation
with memory 42 control the operation of the user panel and directs communications
with the control panel along with the input/output port. Indicator 43 provides
the user with indication relating to the operation of the security system, and
may provide audible and visual indication of an alarm condition. The indicator
may include a liquid crystal display and a sound generator.
The foregoing has been a description of a novel and non-obvious security
control panel and system. The inventors do not intend this description to limit
the scope of the invention, but instead define the invention through the claims