Abstract: A method and an apparatus for eliminating residual charges in a flat-panel x-ray detector are provided. The apparatus includes a flat-panel x-ray detector, a first bias voltage source and a second bias voltage source. The flat-panel x-ray detector includes a photoconductor layer and an electrode layer disposed on the photoconductor layer. The electrode layer converts x-rays to positive and negative charges. The first bias voltage source generates a first bias voltage applied to the photoconductor layer to form a first electric field. The second bias voltage source generates a second bias voltage applied to the photoconductor layer to form a second electric field. The first and second bias voltages are polar opposites. The positive and negative charges respectively at two opposite surfaces of the photoconductor layer in the first electric field are driven from one surface to the other one to be neutralized in the second electric field.

Abstract: An embodiment of a baseline drift canceling method is provided. The method removes a baseline drift signal from a bioelectric signal, and includes the steps as follows: delaying the bioelectric signal by an analog time delay circuit to generate a first bioelectric signal; according to the bioelectric signal to generate a baseline drift signal; and acquiring a second bioelectric signal according to the first bioelectric signal and the baseline drift signal.

Abstract: An apparatus for monitoring fetal positions and fetal movements is provided. The apparatus includes a plurality of sensors, a signal pre-processor, a signal post-processor, and a fetal position judging processor. The sensors are attached on the abdomen of a maternal body to provide at least three measuring leads. The signal pre-processor receives a plurality of sensing signals from the sensors, and the signal pre-processor reduces noises in the sensing signals and amplifies the sensing signals to output a plurality of characteristic sensing signals. The signal post-processor receives the characteristic sensing signals from the signal pre-processor and separates out a plurality of fetal electrocardiograms (FECGs) corresponding to the leads. The fetal position judging processor analyzes the FECGs to obtain a characteristic waveform for each of the FECGs or directly calculates a fetal heart axis vector with respect to a front-side coordinate of the maternal body according to the FECGs.

Abstract: An apparatus for monitoring fetal positions and fetal movements is provided. The apparatus includes a plurality of sensors, a signal pre-processor, a signal post-processor, and a fetal position judging processor. The sensors are attached on the abdomen of a maternal body to provide at least three measuring leads. The signal pre-processor receives a plurality of sensing signals from the sensors, and the signal pre-processor reduces noises in the sensing signals and amplifies the sensing signals to output a plurality of characteristic sensing signals. The signal post-processor receives the characteristic sensing signals from the signal pre-processor and separates out a plurality of fetal electrocardiograms (FECGs) corresponding to the leads. The fetal position judging processor analyzes the FECGs to obtain a characteristic waveform for each of the FECGs or directly calculates a fetal heart axis vector with respect to a front-side coordinate of the maternal body according to the FECGs.

Abstract: An embodiment of a baseline drift canceling method is provided. The method removes a baseline drift signal from a bioelectric signal, and includes the steps as follows: delaying the bioelectric signal by an analog time delay circuit to generate a first bioelectric signal; according to the bioelectric signal to generate a baseline drift signal; and acquiring a second bioelectric signal according to the first bioelectric signal and the baseline drift signal.

Abstract: An optical measuring system includes a carrying tray for carrying a specimen, a first light source module, a second light source module and an optical measuring module. The first light source module is disposed at the first side of the carrying tray and the specimen is disposed on the optical path of the first light source module. The second light source module is disposed at the second side of the carrying tray and the specimen is disposed on the optical path of the second light source module. The optical measuring module is disposed at the first side or the second side of the carrying tray, and the specimen is located within the probing range of the optical measuring module.

Abstract: An optical measuring system includes a carrying tray for carrying a specimen, a first light source module, a second light source module and an optical measuring module. The first light source module is disposed at the first side of the carrying tray and the specimen is disposed on the optical path of the first light source module. The second light source module is disposed at the second side of the carrying tray and the specimen is disposed on the optical path of the second light source module. The optical measuring module is disposed at the first side or the second side of the carrying tray, and the specimen is located within the probing range of the optical measuring module.