Abstract:
Three means or methods for compensating for thermal noise, also referred to as dark signal, are utilized to enhance the accuracy of a monolithic diode array. A charge-coupled linear photodiode array is used in a camera to detect densities of any image projected or reflected onto the array. After conversion, voltage variations of one/one thousandth (1/1,000) volt in a ten volt range are significant to the measurement of densities. Therefore, extremely accurate control of thermal noise, which is generated in the cell sites and in the shift registers used to obtain the data from the cell sites, is extremely important. The three methods or means of control are as follows. Temperature control maintains the temperature of the photodiode array at approximately ten degrees centigrade to minimize the generation of thermal noise. A thermistor is used to detect any temperature variations within the range controlled by the cooling means and the reading is compensated for those variations in temperature. Finally, thermal noise generated in masked cells are measured and used as a correction or calibration for the readings. The foregoing means and methods enhance the accuracy of the readings by an order of magnitude.
Abstract:
PROBLEM TO BE SOLVED: To provide a processing method and a measured value processing device, not depending on a temperature, capable of quickly and strongly restraining direct current voltage, and having improved analog sensor signal. SOLUTION: The analog sensor signal supplied to the first input of operational amplifiers 704, 706 is amplified by the operational amplifiers. The amplified analog sensor signal is measured and compared with the threshold. The direct current voltage is generated depending on a difference between the amplified analog sensor signal and the threshold. A differential signal is formed, based on the analog sensor signal and the direct current voltage. The differential signal is amplified to output an output signal. This measured value processing device has the operational amplifiers for amplifying the analog sensor signal supplied to the first input, and a controller 708 for measuring the amplified analog sensor signal and for comparing the amplified analog sensor signal with the threshold. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
시료 측정에 유리하도록 분광기의 파라미터를 조정하고, 레퍼런스 물질의 반사도를 조절하여 낮은 반사도의 스펙트럼을 측정한 후 100% 반사도의 스펙트럼으로 변환함으로써 시료 스펙트럼의 신호대 잡음비(Signal to Noise Ratio: SNR)을 높일 수 있는 시료 분석을 위한 레퍼런스 스펙트럼 측정 장치 및 방법, 시료 분석 장치 및 방법이 개시된다.
Abstract:
The present invention concerns a method and system for gas concentration measurement of gas or gas mixtures dissolved in liquids. A gas or gas mixture dissolved in a liquid sample is extracted from the liquid sample using an extraction system and conducted into a measurement chamber. Then a measurement signal is generated by means of a radiant source and the measurement signal is directed to a measurement object in a measurement chamber containing the gas or gas mixture to be measured. The measurement signal is filtered using at least two wavelengths, whereupon the filtering is preferably implemented by means of an electrically tunable, short-resonator Fabry-Perot interferometer. Then the filtered measurement signals are detected my means of a detector.
Abstract:
This invention concerns a method of processing an analog sensor signal, wherein the analog sensor signal, which is fed into a first input of an operational amplifier, is amplified by the operational amplifier. The amplified analog sensor signal is measured and compared with a threshold value. A direct voltage is generated depending on a difference between the amplified analog sensor signal and the threshold value, and a difference signal is formed from the analog sensor signal and the direct voltage. The difference signal is amplified and output as the output signal.
Abstract:
The invention relates to a device for inspecting eggs for the presence of blood. The device comprises a light source in order to pass light at a first wavelength which is not selectively absorbed by blood and light at a second wavelength which is selectively absorbed by blood through an egg to be inspected. Furthermore, the device comprises detection means for converting the light transmission through the egg to be inspected for each of the two wavelengths into corresponding signals, each of the said signals being representative of the light transmission at the relevant wavelength. The device also comprises signal-processing means which are transmission associated with the first wavelength and the light transmission associated with the second wavelength based on the signals emanating from the detection means and to emit a decision signal which is representative of the decision whether or not an egg contains blood on the basis of this ratio. According to the invention, the light source comprises one or more identical LED's (Light Emitting Diode) for generating light which passes through the egg. In use the one or more LED's emit light within a certain narrow spectrum, which spectrum comprises both the first and the second wavelength.
Abstract:
A device may determine a calibration value for a spectrometer using light from a first light source; deactivate the first light source after determining the calibration value; perform measurement with regard to a sample based on the calibration value, wherein the measurement of the sample is performed using light from a second light source; determine that the calibration value is to be updated; and update the calibration value using the light from the first light source.
Abstract:
The invention relates to a device for inspecting eggs for the presence of blood. The device comprises a light source in order to pass light at a first wavelength which is not selectively absorbed by blood and light at a second wavelength which is selectively absorbed by blood through an egg to be inspected. Furthermore, the device comprises detection means for converting the light transmission through the egg to be inspected for each of the two wavelengths into corresponding signals, each of the said signals being representative of the light transmission at the relevant wavelength. The device also comprises signal-processing means which are transmission associated with the first wavelength and the light transmission associated with the second wavelength based on the signals emanating from the detection means and to emit a decision signal which is representative of the decision whether or not an egg contains blood on the basis of this ratio. According to the invention, the light source comprises one or more identical LED's (Light Emitting Diode) for generating light which passes through the egg. In use the one or more LED's emit light within a certain narrow spectrum, which spectrum comprises both the first and the second wavelength.
Abstract:
The present invention concerns a method and system for gas concentration measurement of gas or gas mixtures dissolved in liquids. A gas or gas mixture dissolved in a liquid sample is extracted from the liquid sample using an extraction system and conducted into a measurement chamber. Then a measurement signal is generated by means of a radiant source and the measurement signal is directed to a measurement object in a measurement chamber containing the gas or gas mixture to be measured. The measurement signal is filtered using at least two wavelengths, whereupon the filtering is preferably implemented by means of an electrically tunable, short-resonator Fabry-Perot interferometer. Then the filtered measurement signals are detected my means of a detector.