System and method for proximity detection
First Claim
1. A system for detecting a proximity of a person to a machine, comprising:
- a first transmitter unit for being carried by the person, the first transmitter unit transmitting a magnetic proximity signal having a predetermined signal strength and a predetermined signal frequency;
a plurality of receiver units, each of the plurality of receiver units located on the machine at a known location for receiving the magnetic proximity signal and determining a received signal strength of the magnetic proximity signal;
a processing unit in communication with the plurality of receiver units and including a storage medium having data defining a first boundary around the machine, the processing unit;
determining a location of the first transmitter unit relative to the machine based on the received signal strength of the magnetic proximity signal received by at least two of the plurality of receiver units and the known location of the at least two of the plurality of receiver units; and
outputting a proximity warning signal if the location of the first transmitter unit relative to the machine is within the first boundary around the machine.
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Accused Products
Abstract
A system and method for detecting a proximity of a person to a machine includes a first transmitter unit carried by the person, a plurality of receiver units located on the machine at know locations, and a processing unit including data defining a first boundary around the machine. The first transmitter unit transmits a magnetic proximity signal having a predetermined signal strength and a predetermined signal frequency. Each of the plurality of receiver units is for determining a received signal strength of the received magnetic proximity signal. The processing unit: determines a location of the first transmitter unit relative to the machine based on the received signal strength of the magnetic proximity signal and the known location of the plurality of receiver units; and outputs a proximity warning signal if the location of the transmitter relative to the machine is within the first boundary around the machine.
25 Citations
24 Claims
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1. A system for detecting a proximity of a person to a machine, comprising:
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a first transmitter unit for being carried by the person, the first transmitter unit transmitting a magnetic proximity signal having a predetermined signal strength and a predetermined signal frequency; a plurality of receiver units, each of the plurality of receiver units located on the machine at a known location for receiving the magnetic proximity signal and determining a received signal strength of the magnetic proximity signal; a processing unit in communication with the plurality of receiver units and including a storage medium having data defining a first boundary around the machine, the processing unit; determining a location of the first transmitter unit relative to the machine based on the received signal strength of the magnetic proximity signal received by at least two of the plurality of receiver units and the known location of the at least two of the plurality of receiver units; and outputting a proximity warning signal if the location of the first transmitter unit relative to the machine is within the first boundary around the machine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for detecting a proximity of a person to a machine, comprising:
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determining a location of a first transmitter unit, carried by the person and transmitting a magnetic proximity signal, relative to the machine based on a received signal strength of the magnetic proximity signal received by at least two of a plurality of receiver units, each of the plurality of receiver units located on the machine at a known location; and outputting a proximity warning signal if the location of the first transmitter unit relative to the machine is within a first geometrically defined boundary around the machine. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification