Determining a position of a submersible vehicle within a body of water
First Claim
1. A method of determining a position of a submersible vehicle within a body of water, comprising:
- determining an initial position of a base node while the base node is at or near a surface of the body of water;
coupling the base node to a weight configured to descend the base node to a floor of the body of water;
updating, by the base node, a position of the base node during descent by exchanging acoustic signals between the first acoustic modem of the base node and the second acoustic modem of the surface vessel, comprising;
determining a range between the base node and the surface vessel using an acoustic signal from the surface vessel;
measuring data regarding at least one property of the body of water that affects the transmission of acoustic signals between the base node and the surface vessel using a sensor of the base node; and
updating, by the base node, the determined range based on the measured data regarding at least one property of the body of water that affects the transmission of the acoustic signals;
determining a position of the base node once the base node has reached the floor of the body of water, wherein determining a position of the base node comprises exchanging acoustic signals between a first acoustic modem of the base node and a second acoustic modem of a surface vessel; and
determining a position of the vehicle based on the position of the base node and acoustic signals exchanged between the first acoustic modem of the base node and a third acoustic modem of the vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods and apparatus determining a position of a submersible vehicle within a body of water are provided. A method comprises determining an initial position of the vehicle while the vehicle is at or near a water surface. The method further comprises coupling the vehicle and a base node to a weight and determining a position of the base node once the base node and vehicle have reached the floor of the body of water using acoustic modems of the vehicle and a surface vessel to aid in calculating the position as they descend, and acoustically transferring the at rest position on the seafloor from the vehicle to the node. The method further comprises decoupling the vehicle from the node and weight and determining a position of the vehicle based on the position of the base node and acoustic signals exchanged between acoustic modems of the vehicle and the base node.
26 Citations
18 Claims
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1. A method of determining a position of a submersible vehicle within a body of water, comprising:
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determining an initial position of a base node while the base node is at or near a surface of the body of water; coupling the base node to a weight configured to descend the base node to a floor of the body of water; updating, by the base node, a position of the base node during descent by exchanging acoustic signals between the first acoustic modem of the base node and the second acoustic modem of the surface vessel, comprising; determining a range between the base node and the surface vessel using an acoustic signal from the surface vessel; measuring data regarding at least one property of the body of water that affects the transmission of acoustic signals between the base node and the surface vessel using a sensor of the base node; and updating, by the base node, the determined range based on the measured data regarding at least one property of the body of water that affects the transmission of the acoustic signals; determining a position of the base node once the base node has reached the floor of the body of water, wherein determining a position of the base node comprises exchanging acoustic signals between a first acoustic modem of the base node and a second acoustic modem of a surface vessel; and determining a position of the vehicle based on the position of the base node and acoustic signals exchanged between the first acoustic modem of the base node and a third acoustic modem of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining a position of a submersible vehicle within a body of water, comprising:
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determining an initial position of a base node while the base node is at or near a surface of the body of water; coupling the base node to a weight configured to descend the base node to a floor of the body of water; updating, by the base node, a position of the base node during descent by exchanging acoustic signals between the first acoustic modem of the base node and the second acoustic modem of the surface vessel, comprising; determining a range between the base node and the surface vessel using an acoustic signal from the surface vessel; measuring data regarding at least one property of the body of water that affects the transmission of acoustic signals between the base node and the surface vessel using a sensor of the base node; and updating, by the base node, the determined range based on the measured data regarding at least one property of the body of water that affects the transmission of the acoustic signals; determining a position of the base node once the base node has reached the floor of the body of water, wherein determining a position of the base node comprises exchanging acoustic signals between a first acoustic modem of the base node and a second acoustic modem of a surface vessel; exchanging signals between the first acoustic modem of the base node and a third acoustic modem of the vehicle; determining, by the base node, a position of the vehicle based on the position of the base node and the acoustic signals exchanged between the base node and the vehicle; and receiving, by the vehicle, the position of the vehicle from the base node. - View Dependent Claims (10, 11, 12, 13)
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14. A method of determining a position of a submersible vehicle within a body of water, comprising:
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determining an initial position of a base node while the base node is at or near a surface of the body of water; coupling the base node to a weight configured to descend the base node to a floor of the body of water; updating, by the base node, a position of the base node during descent by exchanging acoustic signals between the first acoustic modem of the base node and the second acoustic modem of the surface vessel, comprising; determining a range between the base node and the surface vessel using an acoustic signal from the surface vessel; measuring data regarding at least one property of the body of water that affects the transmission of acoustic signals between the base node and the surface vessel using a sensor of the base node; and updating, by the base node, the determined range based on the measured data regarding at least one property of the body of water that affects the transmission of the acoustic signals; determining a position of the base node once the base node has reached the floor of the body of water, wherein determining a position of the base node comprises exchanging acoustic signals between a first acoustic modem of the base node and a second acoustic modem of a surface vessel; exchanging signals between the first acoustic modem of the base node and a third acoustic modem of the vehicle; and determining, by the vehicle, a position of the vehicle based on the position of the base node and the acoustic signals exchanged between the base node and the vehicle. - View Dependent Claims (15, 16, 17, 18)
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Specification