變壓器與氣體絕緣開關故障的原因，常因為絕緣性能變差引起部分放電（Partical Discharge, PD）。我們利用音射（Acoustic Emission, AE）原理，設計一簡易型部分放電檢測器。由於部分放電所產生的音波信號頻率不高，約20～80 kHz，因此可使用一般的電子電路元件來建構檢測器，使價格動輒數十萬至數百萬的檢測設備，成本能大幅降低。我們同時設計一音射信號波形模擬器，以方便音射檢測器的開發。利用LabVIEWTM圖控程式與資料擷取卡，配合自行開發的人機介面及數位/類比信號轉換控制，建構一套可應用於部分放電檢測器的音波信號模擬器。本研究以音射信號波形模擬器重現音射信號，並用來測試簡易檢測器。檢測器以AVR單晶片作為系統控制核心，當偵測到有部分放電音波產生時，就由比較器產生一個方波給單晶片，使用單晶片內部的計時器/計數器（Timer/Counter）來計數部分放電的次數，以每秒為計數單位，並透過LCD顯示計數值，以利使用廠商對於電力設備故障與否的判斷，避免電力中斷。

Transformer and gas insulated switchgear (GIS) breakdown is usually caused by the malfunction of the insulation, giving rise to partial discharge (PD). We design a simple discharge detector for power equipment monitoring using acoustic emission (AE) technique. The frequency of AE signals generated form PD is around 20 to 80 kHz. Hence, general electric components can be used to build a detector, easily causing tens of thousands to millions priced detecting equipments to reduce their costs. At the same time, we also designed an AE-PD signal waveform simulator, paving for convenient development of the AE detector. Using LabVIEWTM language and data acquisition board, paired with self-developing interface and digital/analog signal convert control, we can build a set of AE signal waveform simulator applicable to a PD detector. This research uses AE signal waveform simulator to reconstruct AE signal and use the signal to test the simple PD detector. The detector uses an AVR microcontroller as the systematic control unit. The AE signals are transformed into square-wave signals by a comparator and then transmitted to a microprocessor, and a timer/counter inside the microprocessor is provided to count the times of PD events. It shows the number of PD events on a LCD so as to determine whether the power equipment needs to be maintained or not and prevents it from breakdown.

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