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Gas monitor having trend indicators
New Patents
4697078 METHOD FOR QUALITY CONTROL OF COUNTING LOGS Russel Randall assigned to Western Atlas International Inc A generalized computer-based system and method for acquisition of nuclear well logging data. A feature of the present invention is the ability to provide time distribution spectra over the entire interval between source firings, such spectra including the gamma radiation produced from both the inelastic scattering and capture of neutrons from said neutron source. The spectra so generated may be analyzed and processed to derive parameters indicative of formation and borehole conditions, for example, a parameter sensitive to borehole geometry and a parameter sensitive to porosity. Certain parameters may be compared as an indication of the presence of gas in a fluid filled formation. Still further, a quantitative measure of the repeatability of the macroscopic thermal neutron absorption capture cross-section may be derived and used to control the weight of the capture cross-section filter.
4697280 METHOD AND APPARATUS FOR THE MEASUREMENT OF X-RAY SOURCES William C Zarnstorff, Frank N Ranallo assigned to Wisconsin Alumni Research Foundation An X-ray measurement device (20) is disclosed which utilizes a pair of detector units (29, 30) which receive X-rays through filters (40, 41) of differing attenuation of X-rays. The detector units preferably include two pairs of photodiode detectors arranged symmetrically in four quadrants with the diodes in each detector unit in diagonally opposite quadrants, thereby minimizing the effects of changes in orientation of the device with respect to the axis of the X-ray beam. The outputs of the detector units are passed to variable gain amplifiers (42, 43) the gains of which are automatically adjusted to bring the output voltages within a desired range, and the outputs of the amplifiers are integrated by integrators (49, 50). After a selected period of time, the integration is stopped and the output voltages of the integrators (49, 50) are held and
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passed to an analog-to-digital converter (57) which determines the ratio of the output signals from the integrators and provides a multi-bit output signal on a bus (58) to the address lines (59) of a preprogrammed memory (60). The data location addressed by the output signal from the conventer may contain data which corresponds to the kVp value of an X-ray machine at the calculated ratio, and the output data from the memory is provided to a display unit (63) to provide a visual display in decimal form of the measured kVp value.
4697450 GAS MONITOR HAVING TREND INDICATORS Thomas E Bachman, Larry S McDavid, David Trueblood assigned to Sensormedics Corporation An improved device for determining the trend of the partial pressure of a gas, such as oxygen or carbon dioxide, which diffuses outwardly through a patient£3 s skin. The device, such as a cutaneous gas monitor, generates over time a series of partial pressure input values that are compared to one another for determining a trend in the partial pressure. This trend is communicated to the operator of the device. + RE
4697532 OPERATING METHOD FOR A REFUSE PROCESSING FURNACE Toshihar Furukawa, Susumu Shimura, Fumio Takai, Norio Sano, Tomonobu Ishida, Nagoya, Japan assigned to Daido Tokushuko Kabushikikaisha An operating method for a refuse processing furnace which processes refuse by melting with electric power, comprising steps of detecting a surface level of heaped refuse in the furnace and controlling amount of either or both of power input and refuse input into the furnace in response to the detected level of the heaped refuse in the furnace. The method assures stable processing with constant yield or outflow of molten refuse besides preventing the furnace and its equipments from being damaged by heat radiation from the molten surface.
4697078 METHOD FOR QUALITY CONTROL OF COUNTING LOGS Russel Randall assigned to Western Atlas International Inc A generalized computer-based system and method for acquisition of nuclear well logging data. A feature of the present invention is the ability to provide time distribution spectra over the entire interval between source firings, such spectra including the gamma radiation produced from both the inelastic scattering and capture of neutrons from said neutron source. The spectra so generated may be analyzed and processed to derive parameters indicative of formation and borehole conditions, for example, a parameter sensitive to borehole geometry and a parameter sensitive to porosity. Certain parameters may be compared as an indication of the presence of gas in a fluid filled formation. Still further, a quantitative measure of the repeatability of the macroscopic thermal neutron absorption capture cross-section may be derived and used to control the weight of the capture cross-section filter.
4697280 METHOD AND APPARATUS FOR THE MEASUREMENT OF X-RAY SOURCES William C Zarnstorff, Frank N Ranallo assigned to Wisconsin Alumni Research Foundation An X-ray measurement device (20) is disclosed which utilizes a pair of detector units (29, 30) which receive X-rays through filters (40, 41) of differing attenuation of X-rays. The detector units preferably include two pairs of photodiode detectors arranged symmetrically in four quadrants with the diodes in each detector unit in diagonally opposite quadrants, thereby minimizing the effects of changes in orientation of the device with respect to the axis of the X-ray beam. The outputs of the detector units are passed to variable gain amplifiers (42, 43) the gains of which are automatically adjusted to bring the output voltages within a desired range, and the outputs of the amplifiers are integrated by integrators (49, 50). After a selected period of time, the integration is stopped and the output voltages of the integrators (49, 50) are held and
III
passed to an analog-to-digital converter (57) which determines the ratio of the output signals from the integrators and provides a multi-bit output signal on a bus (58) to the address lines (59) of a preprogrammed memory (60). The data location addressed by the output signal from the conventer may contain data which corresponds to the kVp value of an X-ray machine at the calculated ratio, and the output data from the memory is provided to a display unit (63) to provide a visual display in decimal form of the measured kVp value.
4697450 GAS MONITOR HAVING TREND INDICATORS Thomas E Bachman, Larry S McDavid, David Trueblood assigned to Sensormedics Corporation An improved device for determining the trend of the partial pressure of a gas, such as oxygen or carbon dioxide, which diffuses outwardly through a patient£3 s skin. The device, such as a cutaneous gas monitor, generates over time a series of partial pressure input values that are compared to one another for determining a trend in the partial pressure. This trend is communicated to the operator of the device. + RE
4697532 OPERATING METHOD FOR A REFUSE PROCESSING FURNACE Toshihar Furukawa, Susumu Shimura, Fumio Takai, Norio Sano, Tomonobu Ishida, Nagoya, Japan assigned to Daido Tokushuko Kabushikikaisha An operating method for a refuse processing furnace which processes refuse by melting with electric power, comprising steps of detecting a surface level of heaped refuse in the furnace and controlling amount of either or both of power input and refuse input into the furnace in response to the detected level of the heaped refuse in the furnace. The method assures stable processing with constant yield or outflow of molten refuse besides preventing the furnace and its equipments from being damaged by heat radiation from the molten surface.