US 11,692,857 B2 · Distributed process state and input estimation for heterogeneous active/passive sensor networks

Abstract

Systems and methods are described for estimating a state of a process and an input to the process using a sensor network. Each sensor node in the sensor network is directly to one or more adjacent sensor nodes and indirectly coupled to the remaining sensor nodes through the one or more adjacent sensor nodes. Each sensor node iteratively calculates a new estimated state based on estimations of the state and the input to the process calculated by the sensor node in a previous iteration. The new estimated state is then adjusted based on a difference between a predicted and actual output of a sensor and is further adjusted based on differences between a previous estimated state calculated by the sensor node and estimated states calculated by adjacent sensor nodes.

Claims20

Dependent claims

A method for observed process estimation, comprising:

receiving an output signal from a sensor of a first sensor node indicative of a measurement of an observed process, wherein the first sensor node is varyingly active or passive depending on whether the observed process is occurring within a defined range of the first sensor node;
calculating a new estimated state of the observed process based at least in part on a previous estimation of a state calculated for the first sensor node and a previous estimation of an input to the observed process calculated for the first sensor node;
adjusting the new estimated state of the observed process based on a calculated difference between the previous estimation of the state calculated for the first sensor node and an estimation of a state calculated for a second sensor node;
and
outputting the adjusted new estimated state of the observed process to at least one adjacent sensor node.

2 more elements

A sensor network comprising a plurality of sensor nodes,

wherein the plurality of sensor nodes includes a subset of active sensor nodes that are able to observe a process and a subset of passive sensor nodes that are not able to observe the process, wherein at least one of the sensor nodes is a varying sensor node that is varyingly active or passive depending on whether the observed process of interest is occurring within a defined range of such varying sensor node, and
wherein each sensor node is configured to:
sense a signal indicative of a measurement of the observed process;
calculate a new estimated state of the observed process based at least in part on an estimation of a state calculated by the sensor node in a previous iteration and a previous estimation of an input to the observed process calculated by the sensor node;
adjust the new estimated state of the observed process for the sensor node based on calculated differences between the estimation of the state calculated by the sensor node in the previous iteration and an estimation of a state calculated by each adjacent sensor node;
and
output the adjusted new estimated state of the observed process to each adjacent sensor node.

4 more elements

Dependencies are inferred from the claim text.

Distributed process state and input estimation for heterogeneous active/passive sensor networks

Life of this patent

Distributed process state and input estimation for heterogeneous active/passive sensor networks

Life of this patent

Abstract

Claims20