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US 11,380,205 B2Granted
Proximity detection system and method and collision avoidance system and method using proximity detection
AssigneeStrata Safety Products, LLC
InventorsLarry D. Frederick, Paul L. Hammond
Life of this patent
Estimating the term…
Abstract
The invention relates to a complex proximity safety and warning system. The invention provides a safety system comprising a generator that generates a magnetic field that establishes a boundary, where the generator is capable of receiving radio frequency signals. Also provided is a radio frequency device that sends radio frequency signals, the radio frequency device being capable of sensing the magnetic field and generating a radio frequency response.
Claims26
A method, comprising the steps of:
- generating, by a magnetic field generator, a magnetic field during a first time period;
- sensing by an alarm device the magnetic field and generating a response signal during a second time period;
- and
- sensing by the magnetic field generator for the response signal within a second time period, wherein the second time period comprises a plurality of time portions;
- wherein the alarm device generates the response signal during a first number of time portions when the alarm device detects the magnetic field at a first strength and generates the response signal during a second number of time portions when the alarm device detects the magnetic field at a second strength.
2 more elements
A safety system, comprising:
- a generator that generates a magnetic field, the generator being configured to receive at least one response signal;
- and
- an alarm device adapted to sense the magnetic field and generate the response signal;
- wherein the generator generates said magnetic field during a first time period, and senses for a response signal from the alarm device within a second time period, wherein the second time period comprises a plurality of time portions;
- wherein the alarm device is adapted to generate the response signal during a first number of time portions when the alarm device detects the magnetic field at a first strength, and
- wherein the alarm device generates the response signal during a second number of time portions when the alarm device detects the magnetic field at a second strength.
3 more elements
Dependencies are inferred from the claim text.