Sensor array evaluation tool and method

• US 9,229,837 B1
• Filed: 01/24/2013
• Issued: 01/05/2016
• Est. Priority Date: 01/24/2013
• Status: Expired due to Fees

• Current Assignee: Government of the United States of America
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Moore, Ryan T., Blue, David J., Wardle, Bonnie E., Charette, Rick H.
• Primary Examiner(s): Tsai, Carol S
• Application Number:
  US13/749,106
• Time in Patent Office: 1,076 Days
• Field of Search: 702/56, 702/183, 700/276, 600/347, 600/365, 714/39
• US Class Current: 1/1
• CPC Class Codes: G01S 7/52004 Means for monitoring or calibrating short-range imaging G01S7/5205
• CPC Class Codes: G01S 7/56 Display arrangements short-range imaging G01S7/52053

Abstract

A method for evaluating a sensor array includes providing software having the sensor array topology, relating array elements to hardware components. Data from the array elements is collected and evaluated to determine operative components. Displays of the determinations are generated allowing a user to diagnose sensor array failures. Other aspects of the invention provide for automatic array failure diagnosis and improvement of sensor array directivity. An additional aspect provides a system for evaluating a sensor array incorporating a computer with a database and a display.

Claims

1. A method for evaluating a sensor array on a computer comprising:

configuring software with associated sensor array topology relating a plurality of array elements to a plurality of hardware components;

collecting data from a plurality of array elements of the sensor array over a time frame of interest;

evaluating the collected data to determine whether each array element is operative;

generating a first chart display that displays determinations whether each array element is operative in the time frame of interest;

generating additional chart displays by a computer processor showing the relationship between the plurality of array elements and the plurality of hardware components and determinations whether each array element is operative in the time frame of interest, said additional chart displays allowing evaluation of the sensor array by a user;

calculating an actual directivity index for the sensor array based on a ratio of the number of operative array elements to the number of non-operative elements and based on weights associated with the operative elements and the non-operative elements;

specifying a theoretical directivity index for the sensor array as a highest possible actual directivity index; and

determining an accuracy of the sensor array based on the difference between the actual directivity index and the theoretical directivity index.

2. The method of claim 1 further comprising the step of increasing the accuracy of the sensor array and increasing the actual directivity index by providing weights for elements in the sensor array.

3. The method of claim 1 further comprising the steps of:

examining array element determinations and relationships between array elements and hardware components from the configured software to find patterns;

diagnosing a non-operative hardware component by examining the patterns found in the step of examining array element determinations; and

providing a display indicating the diagnosed non-operative hardware component.

4. The method of claim 1 further comprising the steps of:

accepting user input proposing a non-operative hardware component;

utilizing the proposed non-operative hardware component with the database to identify related array elements that appear as non-operative when the proposed hardware component is non-operative; and

comparing the identified related array elements with at least one of the first chart display and the additional chart displays to determine if the proposed non-operative hardware component is a likely cause of the resulting compared display.

5. The method of claim 1 wherein:

said array elements comprise;

a plurality of fiber optic lines; and

a plurality of interferometric sensors formed in said plurality of fiber optic lines;

said hardware components comprise;

a plurality of lasers operating at different frequencies, and joined to provide light to said plurality of fiber optic lines, and further being associated with individual array elements on different ones of said plurality of fiber optic lines;

a plurality of processing cards each being joined to receive signals from at least one of said plurality of fiber optic lines; and

at least one chassis, each chassis joined to several of said plurality of processing cards for consolidating signals from said cards.

6. A system comprising:

a sensor array with a plurality of array elements;

a plurality of hardware components joined to said sensor array;

software configured with relationships among said plurality of hardware components and said plurality of array elements; and

a computer capable of executing said software, said plurality of hardware components and a display, said computer being configured to generate at least one chart display that includes data with respect to whether the plurality of array elements and hardware components are operational on an average basis for a time frame of interest, said chart display also capable of showing the relationships from said software and illustrating patterns of non-operational array elements;

wherein said computer is configured to;

calculate an actual directivity index for the sensor array based on a ratio of the number of operative array elements to the number of in-operative elements and based on weights associated with the operative elements and in-operative elements;

specify a theoretical directivity index for the sensor array as a highest possible actual directivity index; and

determine an accuracy of the sensor array based on the difference between the actual directivity index and the theoretical directivity index.

7. The system of claim 6 wherein said computer is configured to identify patterns of non-operational array elements and provide a display of a proposed diagnosis indicating which of said plurality of hardware components has failed.

8. A system comprising:

a sensor array with a plurality of array elements;

a plurality of hardware components joined to said sensor array;

software configured with relationships among said plurality of hardware components and said plurality of array elements; and

a computer capable of executing said software, said plurality of hardware components and a display, said computer being configured to generate at least one chart display that includes data with respect to whether the plurality of array elements and hardware components are operational on an average basis for a time frame of interest, said chart display also capable of showing the relationships from said software and illustrating patterns of non-operational array elements;

wherein;

said array elements comprise;

a plurality of fiber optic lines; and

a plurality of interferometric sensors formed in said plurality of fiber optic lines;

said hardware components comprise;

a plurality of lasers operating at different frequencies, and joined to provide light to said plurality of fiber optic lines, and further being associated with individual array elements on different ones of said plurality of fiber optic lines;

a plurality of processing cards each being joined to receive signals from at least one of said plurality of fiber optic lines; and

at least one chassis, each chassis joined to several of said plurality of processing cards for consolidating signals from said cards.