| 摘要 |
Method and apparatus are disclosed for communicating utility usage information from a utility usage location to a portable utility usage registering device (22). A utility usage detection circuit (10) is provided at the utility usage location. The circuit is connectable to a conventional utility meter (12), e.g., a natural gas meter, and provides an electrical signal indicative of utility usage. This signal is applied across a first inductive coil (23), which is mounted at the utility usage location such that the resulting magnetic field is accessible. A matching coil (36) is associated with the portable utility usage registering device and is housed such that it may be positioned within the magnetic field produced by the first inductive coil. When thus positioned the electrical signal produced by the circuit (10) is induced in the matching coil as a result of mutual inductance between the two coils. The electrical signal is thus communicated to the portable utility usage registering device without utilizing conventional electrical connectors, which are susceptible to corrosion, dirt contamination, etc.
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