Abstract: Disclosed is a wireless temperature measurement apparatus using a SAW device which calculates a temperature by detecting a change in resonance frequency, the resonance frequency being physically changed by a temperature. The apparatus includes: a surface acoustic wave (SAW) device including an inter-digital transducer (IDT) generating a surface acoustic wave and a reflector reflecting the surface acoustic wave and outputting the wave to an antenna, wherein the surface acoustic wave is physically deformed by a temperature change, and a reader generating a transmitting signal within a set frequency band and transmitting the signal to the SAW device, detecting an amplified resonance frequency signal which matches a deformed surface acoustic wave, the deformed surface acoustic wave being one of the reflected waves and being physically deformed by the temperature change, and detecting a temperature of the SAW device by comparing the amplified resonance frequency with a preset frequency.

Abstract: Disclosed is a wireless temperature measurement apparatus using a SAW device which calculates a temperature by detecting a change in resonance frequency, the resonance frequency being physically changed by a temperature. The apparatus includes: a surface acoustic wave (SAW) device including an inter-digital transducer (IDT) generating a surface acoustic wave and a reflector reflecting the surface acoustic wave and outputting the wave to an antenna, wherein the surface acoustic wave is physically deformed by a temperature change, and a reader generating a transmitting signal within a set frequency band and transmitting the signal to the SAW device, detecting an amplified resonance frequency signal which matches a deformed surface acoustic wave, the deformed surface acoustic wave being one of the reflected waves and being physically deformed by the temperature change, and detecting a temperature of the SAW device by comparing the amplified resonance frequency with a preset frequency.

Abstract: The present invention relates generally to a partial discharge counter for the diagnosis of a GIS. The partial discharge counter includes a partial discharge detection sensor for detecting a partial discharge. A first surge inflow prevention circuit separates a surge signal from an output terminal of the partial discharge detection sensor. A channel 1 frequency conversion module forms a low-frequency signal. A noise detection sensor detects noise. A second surge inflow prevention circuit separates a surge signal from an output terminal of the noise detection sensor. A channel 2 frequency conversion module forms a low-frequency signal. An ADC circuit generates partial discharge data and noise data. A synchronization device enables the partial discharge data and the noise data to be output in synchronization with frequency of the phase voltage. A digital signal processing unit counts a number of times the partial discharge occurs. Counting units display a count value.

Abstract: The present invention relates generally to a partial discharge counter for the diagnosis of a GIS. The partial discharge counter includes a partial discharge detection sensor for detecting a partial discharge. A first surge inflow prevention circuit separates a surge signal from an output terminal of the partial discharge detection sensor. A channel 1 frequency conversion module forms a low-frequency signal. A noise detection sensor detects noise. A second surge inflow prevention circuit separates a surge signal from an output terminal of the noise detection sensor. A channel 2 frequency conversion module forms a low-frequency signal. An ADC circuit generates partial discharge data and noise data. A synchronization device enables the partial discharge data and the noise data to be output in synchronization with frequency of the phase voltage. A digital signal processing unit counts a number of times the partial discharge occurs. Counting units display a count value.