Control algorithm for wireless sensor to estimate and calculate environmental parameters
First Claim
1. A wireless sensor with a control algorithm comprising:
- a transmitter configured to transmit using a carrier frequency and modulation, via an antenna, at least one of a coded burst pattern and an IP (Internet Protocol) address pattern to a surrounding environment of said wireless sensor;
a receiver configured to receive at said carrier frequency and modulation, via the antenna, a reflected signal of at least one of said coded burst pattern and said IP address pattern from an object in said surrounding environment of said wireless sensor;
a processor configured to;
record a time of completion of transmission of at least one of said coded burst pattern and said IP address pattern;
measure a received signal strength intensity (RSSI) of said reflected signal;
reject said reflected signal if said RSSI is more than a threshold value then wait a random time before transmitting again;
keep said reflected signal for further processing if said RSSI is less than said threshold value;
detect at least one of said coded burst pattern and said IP address pattern from said reflected signal and record a time of completion of detection;
calculate from said time of completion of transmission and said time of completion of detection a distance, and an approaching speed of said object in said surrounding environment of said wireless sensor;
evaluate said distance and said approaching speed of said object to determine whether said processor needs to activate a device or a function.
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Accused Products
Abstract
A control algorithm for wireless sensor to estimate and calculate environmental parameters. The control algorithm comprises a method to calculate the distant between an approaching object to wireless sensor receive antenna by measuring the travelling time between completion of transmission of transmit signal at the transmit antenna and completion of reception of the reflected transmit signal at the receive antenna, a method of calculating the approaching speed of an object to wireless sensor receive antenna by using multiple distance measurements, and a method to calculate impact force from an approaching object based on estimated mass of the object and deceleration of its speed.
7 Citations
4 Claims
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1. A wireless sensor with a control algorithm comprising:
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a transmitter configured to transmit using a carrier frequency and modulation, via an antenna, at least one of a coded burst pattern and an IP (Internet Protocol) address pattern to a surrounding environment of said wireless sensor; a receiver configured to receive at said carrier frequency and modulation, via the antenna, a reflected signal of at least one of said coded burst pattern and said IP address pattern from an object in said surrounding environment of said wireless sensor; a processor configured to; record a time of completion of transmission of at least one of said coded burst pattern and said IP address pattern; measure a received signal strength intensity (RSSI) of said reflected signal; reject said reflected signal if said RSSI is more than a threshold value then wait a random time before transmitting again; keep said reflected signal for further processing if said RSSI is less than said threshold value; detect at least one of said coded burst pattern and said IP address pattern from said reflected signal and record a time of completion of detection; calculate from said time of completion of transmission and said time of completion of detection a distance, and an approaching speed of said object in said surrounding environment of said wireless sensor; evaluate said distance and said approaching speed of said object to determine whether said processor needs to activate a device or a function. - View Dependent Claims (2, 3, 4)
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Specification