초록 ▼

A telemetry and control system is disclosed for use in direct current power wiring applications, such as those used in automobiles or other vehicles. The system includes a master transmitter which encodes data as a train of current pulses which modulate the d.c. supply voltage. A slave receiver at a

A telemetry and control system is disclosed for use in direct current power wiring applications, such as those used in automobiles or other vehicles. The system includes a master transmitter which encodes data as a train of current pulses which modulate the d.c. supply voltage. A slave receiver at another location, connected to the same power source through pre-existing wiring, amplifies the supply voltage modulation, recovers the data waveform, and decodes it, to effect an action or display a measurement or status indication. A second transmitter combined with the slave receiver may transmit data similarly for reception by a second receiver combined with the master transmitter, to enable two-way communication therebetween. Applications of the system include an emergency battery booster, an anti-theft battery disconnection device, a distress alert system, activation and reception of data from outboard devices, and remote measurement of fluid levels, temperatures and pressures.

대표청구항 ▼

An apparatus for transmitting and receiving telemetry and control signals via an existing direct current power circuit, comprising: a transmitter circuit connected to said power circuit at a first location for generating a pulsed signal coded according to a desired telemetry or control function and

An apparatus for transmitting and receiving telemetry and control signals via an existing direct current power circuit, comprising: a transmitter circuit connected to said power circuit at a first location for generating a pulsed signal coded according to a desired telemetry or control function and for imposing said pulsed signal on said power circuit, said pulsed signal being similar to a noise induced by existing electrical activity caused by other devices connected to said power circuit, but having a more regular and controlled periodicity, whereby said pulsed signal is prevented from interfering with other devices connected to said power circuit by existing precautions in said other devices directed to said noise, but is discernable from said noise based on said more regular and controlled periodicity; and a receiver circuit at a second location connected to said power circuit for determining the presence of said pulsed signal in said power circuit and for regenerating and decoding said pulsed signal to perform said desired telemetry or control function.