Universal generator interface module
First Claim
1. Apparatus for interfacing a metering pulse generator to a pulse counter, the apparatus comprising:
- inputs for connection to receive a sinusoidal waveform with one or more lobes from the metering pulse generator;
outputs for transmitting an output pulse to the pulse counter;
a charging circuit connected across the inputs to receive, and be charged by, the sinusoidal waveform from the metering pulse generator;
a solid state switch responsive to accumulated charge in the charging circuit to switch from an "off" state to an "on" state; and
a logic pulse generator connected between the solid state switch and the outputs, for physical and electrical isolation of the metering pulse generator from the pulse counter, the logic pulse generator being operable in response to the "on" state of the solid state switch to generate said output pulse as a logic pulse through the outputs to the pulse counter.
1 Assignment
0 Petitions
Accused Products
Abstract
A module for interfacing a variety of metering pulse generators converts an analog pulse from a generator into a digital pulse which can be counted by automatic meter reading equipment. A charging circuit is connected across the inputs to receive, and be charged by, an input waveform from the metering pulse generator. A solid state switch responds to accumulated charge in the charging circuit to switch from an "off" state to an "on" state. A logic pulse generator is connected between the solid state switch and the outputs, for physical and electrical isolation of the metering pulse generator from the pulse counter. The logic pulse generator responds to the "on" state of the solid state switch to generate a logic pulse to the pulse counter.
26 Citations
8 Claims
-
1. Apparatus for interfacing a metering pulse generator to a pulse counter, the apparatus comprising:
-
inputs for connection to receive a sinusoidal waveform with one or more lobes from the metering pulse generator; outputs for transmitting an output pulse to the pulse counter; a charging circuit connected across the inputs to receive, and be charged by, the sinusoidal waveform from the metering pulse generator; a solid state switch responsive to accumulated charge in the charging circuit to switch from an "off" state to an "on" state; and a logic pulse generator connected between the solid state switch and the outputs, for physical and electrical isolation of the metering pulse generator from the pulse counter, the logic pulse generator being operable in response to the "on" state of the solid state switch to generate said output pulse as a logic pulse through the outputs to the pulse counter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification