# US 10,482,736 B2 · Restricted area automated security system and method

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- Number: US 10,482,736 B2
- Document ID: US10482736B2
- Status: Granted
- Kind: B2
- Application number: 15/957,377
- Filed: 2018-04-19
- Published: 2018-08-30
- Granted: 2019-11-19
- Earliest claimed: 2016-04-11
- Assignees: Pepperl + Fuchs GmbH
- Applicants: Comtrol Corporation
- Inventors: Nolan Kariniemi; Mark Pikkarainen
- Web page: https://patentgrep.com/patent/US10482736B2

## CPC

- G08B 13/183: by interruption of a radiation beam or barrier
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

## Abstract

A security system includes a plurality of laser scanners to establish light shields in an area to be monitored, with each of the light shields including at least one detection zone, and a controller to detect unauthorized entry to the area to be monitored based on a position and timing of breaks in the detection zones of the light shields.

## Claims

### Claim 1

A security system, comprising:
a plurality of laser scanners to establish light shields in an area to be monitored, each of the light shields including at least one detection zone; and
a controller to detect unauthorized entry to the area to be monitored based on a position and timing of breaks in the detection zones of the light shields,
the controller to determine a direction of movement of an entity within the area to be monitored based on a sequence in which breaks in the detection zones of the light shields occur,
the controller to trigger a security action if the direction of movement is disallowed,
the controller not to trigger a security action if a direction of secondary movement of the entity is opposite a direction of primary movement of the entity that is allowed.

### Claim 2 (depends on 1)

The security system of claim 1, the plurality of laser scanners to establish planar light shields each including at least one planar detection zone.

### Claim 3 (depends on 1)

The security system of claim 1, the plurality of laser scanners to create a three dimensional matrix of two dimensional detection zones.

### Claim 4 (depends on 1)

The security system of claim 1, the plurality of laser scanners to be mounted above the area to be monitored.

### Claim 5 (depends on 1)

The security system of claim 1, the area to be monitored comprising an egress area from a secured area to an unsecured area.

### Claim 6 (depends on 1)

The security system of claim 1, the light shield of at least one of the plurality of laser scanners to be oriented at a non-orthogonal angle to the area to be monitored.

### Claim 7 (depends on 1)

The security system of claim 1, the light shields of a number of the plurality of laser sensors to be oriented substantially parallel with each other.

### Claim 8 (depends on 1)

The security system of claim 1, the light shields of a first number of the plurality of laser scanners to be oriented substantially parallel with each other at a first non-orthogonal angle and the light shields of a second number of the plurality of laser scanners to be oriented substantially parallel with each other at a second non-orthogonal angle.

### Claim 9 (depends on 1)

The security system of claim 1, the plurality of laser scanners to establish light shields each including a plurality of detection zones.

### Claim 10

A security method, comprising:
establishing light shields with a plurality of laser scanners in an area to be monitored, each of the light shields including at least one detection zone; and
detecting unauthorized entry to the area to be monitored based on a position and timing of breaks in the detection zones of the light shields
determining a direction of movement of an entity within the area to be monitored based on a sequence in which breaks in the detection zones of the light shields occur,
triggering a security action if the direction of movement is disallowed,
not triggering a security action if a direction of secondary movement of the entity is opposite a direction of primary movement of the entity that is allowed.

### Claim 11 (depends on 10)

The security method of claim 10, creating a three dimensional matrix of two dimensional detection zones with the plurality of laser scanners.

### Claim 12 (depends on 10)

The security method of claim 10, orienting the light shields of a number of the plurality of laser sensors substantially parallel with each other.

### Claim 13 (depends on 10)

The security method of claim 10, orienting the light shields of a first number of the plurality of laser scanners substantially parallel with each other at a first non-orthogonal angle and orienting the light shields of a second number of the plurality of laser scanners substantially parallel with each other at a second non-orthogonal angle.