System and method for locating buried pipes and cables with a man portable locator and a transmitter in a mesh network
A system and method for locating buried cables, pipes and other utilities includes a man portable receiver/locator which is linked by a wireless mesh connection to a transmitter which either directly applies, or induces, a signal onto a buried utility.
1. A system for locating a hidden utility, comprising:
a man portable receiver/locator; and
wireless communication means for establishing a meshed network with a plurality of nodes including the receiver/locator and at least one transmitter configured to inductively or directly apply a signal to the hidden utility;
wherein the transmitter is configured to change a characteristic associated with the applied signal in response to a command received from a node of the mesh network.
2. The system of claim 1 wherein the nodes of the meshed network includes one or more nodes selected from the group consisting of an A-frame fault detection device, a conductor-identifying stethoscope, a ground penetrating radar device, and a remote geophone.
3. The system of claim 1 wherein the receiver/locator is configured to determine an amount of cross coupling associated with adjacent utilities based on a measurement of one or more field angles.
4. The system of claim 1 wherein the wireless communication means is configured to broadcast information to other nodes of the network at predetermined intervals.
5. The system of claim 1 wherein the man portable receiver/locator includes means for causing the transmitter to apply a plurality of signals at different frequencies and determining an optimum frequency for determining a location of the hidden utility.
6. The system of claim 1 wherein the man portable receiver/locator includes a plurality of ground tracking transducers and means for deriving positional information based on Doppler shifts detected by the transducers.
7. The system of claim 1 wherein the receiver locator includes means for determining a location of the hidden utility based on time-of-flight positioning between the receiver/locator, the one transmitter and at least one ranging beacon.
8. A system for locating a hidden utility, comprising:
a man portable receiver/locator; and
wireless communication means for establishing a meshed network with a plurality of nodes including the receiver/locator and at least one transmitter configured to inductively or directly apply a signal to the hidden utility;
wherein the man portable receiver/locator includes means for calculating a predetermined signal quality metric and commanding the one transmitter to increase or decrease transmitted current in order to meet the predetermined signal quality metric.
9. A method of locating a hidden utility, comprising the steps of:
providing a man portable receiver/locator;
providing at least one transmitter configured to inductively or directly apply a signal to a hidden utility; and
wirelessly communicating between the man portable receiver/locator and the transmitter to apply a signal to the hidden utility in a predetermined manner that optimizes the locating process, and wherein the communication is performed by treating the portable receiver/locator and the one transmitter as nodes of a meshed network.
10. The method of claim 9 wherein the meshed network includes pipe inspection camera configured to receive data indicating Sonde signal strength from the receiver/locator.
11. The method of claim 9 wherein the communication is performed according to a ZigBee protocol.
12. The method of claim 9 wherein the man portable receiver/locator causes the one transmitter to apply a plurality of signals at different frequencies and then determines an optimum frequency for determining a location of the hidden utility.
13. The method of claim 9 and further comprising the step of broadcasting information to the other nodes of the network at predetermined intervals.
14. The method of claim 9 wherein the man portable receiver/locator derives positional information based on Doppler shifts detected by a plurality of ground tracking transducers.
15. The method of claim 9 wherein the meshed network contains three or more nodes selected from the group consisting of a receiver/locator, an A-frame fault detection device, a conductor-identifying stethoscope, a ground penetrating radar device, a remote geophone, a GPS receiver, and a transmitter configured to inductively or directly applying a signal to a hidden utility.
16. The method of claim 9 wherein the man portable receiver/locator communicates with a plurality of ranging beacons deployed to define a locating area.
17. A method of locating a hidden utility, comprising the steps of:
providing a man portable receiver/locator;
providing at least one transmitter configured to inductively or directly apply a signal to a hidden utility; and
wirelessly communicating between the man portable receiver/locator and the transmitter to apply a signal to the hidden utility in a predetermined manner that optimizes the locating process, and wherein the communication is performed by treating the portable receiver/locator and the one transmitter as nodes of a meshed network;
wherein the man portable receiver/locator calculates a predetermined signal quality metric and commands the one transmitter to increase or decrease transmitted current in order to meet the predetermined signal quality metric.
18. A method of locating a hidden utility, comprising the steps of:
providing a man portable receiver/locator;
providing at least one;
wirelessly communicating between the man portable receiver/locator and the transmitter;
causing the transmitter to apply a signal to the hidden utility in a predetermined manner that optimizes the locating process; and
determining a location of the hidden utility based on time-of-flight positioning between the receiver/locator, the one transmitter and at least one ranging beacon.