Full-duplex communication method based on single-core electric cables
A communication method and single-core cable technology, applied in the field of communication, can solve the problems of long instrument connectors, complex structures, and many connection points, and achieve the effects of simple connection, low error rate, and simple structure
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[0037] The present invention provides a method of communication between the logging instrument and the ground numerical control and the logging instrument, the method includes the following steps:
[0038] 1) Commands that need to be sent to downhole tools for surface NC construction:
[0039] 2) The ground numerical control couples the already constructed commands that need to be sent to the downhole tool to the cable and sends it to the downhole tool through the cable:
[0040] 2.1) The surface numerical control converts the already constructed commands that need to be sent to downhole instruments into low-frequency sine wave signals; the commands that need to be sent to downhole instruments are low-frequency TTL level signals;
[0041] Such as figure 1 As shown, the command to be issued enters the circuit from the RX terminal. After a differential, fourth-order low-pass and reverse amplification, the TTL level signal sent by the computer is converted into a sinusoidal sign...
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