Two-conductor bidirectional digital seismic telemetry interface
First Claim
1. A seismic telemetry interface, comprising:
- a master electronics module;
a slave electronics module;
a two-conductor line connecting the master electronics module to the slave electronics module; and
wherein the master electronics module transmits at least a portion of a digital command to the slave electronics module over the two-conductor line at a first time and the slave electronics module transmits a portion of a digital data sequence to the master electronics module over the two-conductor line at a different second time and wherein the master electronics module supplies at least a portion of the electrical power to power the slave electronics module over the two-conductor line.
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Accused Products
Abstract
A two-conductor bidirectional digital telemetry interface between a seismic sensor acquisition/conversion module and a seismic data collection module. The data collection module is configured as a master electronics device and the sensor acquisition/conversion module is configured as a slave electronics device in the telemetry system. The master device provides power to the slave device over the two conductors. The master device transmits portions of commands to the slave device at a first time and the slave device transmits portions of a digital seismic data packet to the master at a different second time in a fixed-duration frame. The frames are transmitted at regular intervals. The outbound commands and inbound data are encoded by block codes. A phase-locked loop in the slave is locked to a master clock in the master by deriving a clock and a sync point from the block-coded commands it receives from the master. The block code representing each command bit minimizes dc drift and provides a level transition in the command that can be used to maintain synchronism between master and slave.
63 Citations
24 Claims
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1. A seismic telemetry interface, comprising:
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a master electronics module;
a slave electronics module;
a two-conductor line connecting the master electronics module to the slave electronics module; and
wherein the master electronics module transmits at least a portion of a digital command to the slave electronics module over the two-conductor line at a first time and the slave electronics module transmits a portion of a digital data sequence to the master electronics module over the two-conductor line at a different second time and wherein the master electronics module supplies at least a portion of the electrical power to power the slave electronics module over the two-conductor line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A seismic telernetxy interface, comprising:
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a master electronics module, including a power supply;
a first slave electronics module;
a second slave electronics module;
a first line composed of at most two conductors electrically interconnecting the master electronics module to the first slave electronics module; and
a second line composed of at most two conductors electrically interconnecting the first slave electronics module to the second slave electronics module;
wherein the first slave electronics module transmits at least a portion of a digital data command to the second slave electronics module over the second line at a first time and the second slave electronics module transmits at least a portion of a digital data sequence to the first slave electronics module over the second line at a different second time, and wherein the power supply in the master electronics module supplies at least a portion of the electrical power to the first slave electronics module over the first line. - View Dependent Claims (12, 13, 14, 15)
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16. A seismic telemetry interface, comprising:
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a master electronics module including a master clock;
a slave electronics module including a phase-locked loop;
a two-conductor line connecting the master electronics module to the slave electronics module; and
wherein the master electronics module transmits a portion of a digital command to the slave electronics module over the two-conductor line at a first time and the slave electronics module transmits a portion of a digital data sequence to the master electronics module over the two-conductor line at a different second time. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification