Survey signal transmitter
OwnerHyun Chang Leeinventor
Life of this patent
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Abstract
A survey voltage transmitter includes a diode, a resistor, a first connection wire connected to a hot wire of AC power at a place, a second connection wire connected to a neutral wire of the AC power, a switching unit for turning on/off a circuit connected between the hot wire and the neutral wire to control a current flow through the diode and the resistor connected in series, a switching control unit for controlling a switch time of the circuit by providing a time control signal to the switching unit to turn on the circuit at a predetermined phase angle of the AC power and turn off the circuit before a half wave extinction phase angle of the AC power, and a coding unit for controlling the switching control unit to generate the current flow or not and for generating a series of logic values corresponding to the current flow.
Claims6
A survey voltage transmitter comprising:
- a diode;
- a resistor;
- a first connection wire connected to a hot wire of AC power at a place;
- a second connection wire connected to a neutral wire of the AC power at the place;
- a switching unit for turning on and off a circuit connected between the hot wire and the neutral wire to control a current flow through the diode and the resistor connected in series;
- a switching control unit for controlling a switch time of the circuit by providing a time control signal to the switching unit to turn on the circuit at a predetermined phase angle of the AC power and turn off the circuit before a half wave extinction phase angle of the AC power;
- and
- a coding unit for controlling the switching control unit to generate the current flow or not and for generating a series of logic values corresponding to the current flow.
A survey current transmitter configured to identify a burial path of a power cable, comprising:
- a diode;
- a resistor;
- a first connection wire connected to a hot wire of AC power at a place;
- a second connection wire connected to a neutral wire of the AC power at the place;
- a switching unit for turning on and off a circuit connected between the hot wire and the neutral wire to control a current flow through the diode and the resistor connected in series;
- a switching control unit for controlling a switch time of the circuit by providing a time control signal to the switching unit to turn on the circuit at a predetermined phase angle of the AC power and turn off the circuit after a half wave extinction phase angle of the AC power;
- and
- a coding unit for controlling the switching control unit to generate the current flow or not and for generating a series of logic values corresponding to the current flow.
Dependencies are inferred from the claim text.