Wireless RF Energy Detector for Heating Appliance Quality Control

The patent replaces the thermal measurement system (fiber-optic thermometers measuring temperature rise over time) with an electromagnetic field detection system. The detector directly measures the RF electric field strength in the heating cavity using an antenna and voltage sensor, eliminating the need for thermal conduction and temperature monitoring, thus reducing test time while maintaining measurement accuracy.

The patent introduces an intermediary detection system consisting of an antenna and voltage sensor that directly interfaces with the RF electromagnetic field. This intermediary measurement approach allows indirect but direct observation of RF energy output without requiring the dummy load to undergo thermal changes, thereby eliminating the time-consuming temperature rise measurement process.

The patent employs a simple, inexpensive detector assembly consisting of a standard antenna and voltage sensor instead of expensive fiber-optic thermometers. This cost-effective measurement system achieves the same evaluation capability through direct electromagnetic field sensing, eliminating the need for costly thermal measurement equipment while maintaining testing accuracy.

The patent substitutes the complex thermal measurement system (requiring fiber-optic thermometers, temperature controllers, and thermal analysis software) with a simpler electromagnetic field detection system. The new system uses basic RF measurement components that are less expensive and less complex while providing equivalent or superior measurement capability for RF energy output evaluation.

The patent replaces the slow thermal measurement process with rapid electromagnetic field detection. The detector directly senses the RF electric field strength in real-time during heating operation, providing immediate quality control feedback without waiting for temperature changes to manifest in dummy loads. This enables rapid throughput suitable for mass production environments while maintaining measurement precision for quality control.

The patent enables continuous real-time measurement of RF energy output during the heating operation itself, rather than requiring separate thermal measurement phases. The detector operates continuously throughout the heating cycle, providing ongoing quality control data without interrupting the heating process or requiring post-heating temperature analysis, thereby significantly increasing production throughput.