Abstract: Provided are a signal processing device for X-ray analysis and an adjustment method for a signal processing device for X-ray analysis, which are capable of performing correction of a time constant with high precision and simply and quickly performing adjustment work required for performing the correction. The signal processing device for X-ray analysis includes: a differentiating circuit configured to use a first time constant to convert a signal output from an X-ray detector into an analog differential wave; an AD converter configured to convert the analog differential wave into a digital differential wave; a waveform shaping digital filter configured to use a second time constant to shape the digital differential wave; and a histogram generation unit configured to acquire a feature value of a shaped waveform based on pulse heights in two regions of the shaped waveform, to generate a histogram representing an acquisition frequency for each feature value.

Abstract: Provided are a signal processing device for X-ray analysis and an adjustment method for a signal processing device for X-ray analysis, which are capable of performing correction of a time constant with high precision and simply and quickly performing adjustment work required for performing the correction. The signal processing device for X-ray analysis includes: a differentiating circuit configured to use a first time constant to convert a signal output from an X-ray detector into an analog differential wave; an AD converter configured to convert the analog differential wave into a digital differential wave; a waveform shaping digital filter configured to use a second time constant to shape the digital differential wave; and a histogram generation unit configured to acquire a feature value of a shaped waveform based on pulse heights in two regions of the shaped waveform, to generate a histogram representing an acquisition frequency for each feature value.

Abstract: Provided is an X-ray fluorescence spectrometer, which has a simple structure, and is capable of promptly performing high-accuracy analysis.

Abstract: Provided is an X-ray fluorescence spectrometer, which has a simple structure, and is capable of promptly performing high-accuracy analysis.

Abstract: An X-ray detection signal processing device (10) and the like according to the present invention includes: a comparator (17) configured to output a High signal when a level of a signal from a continuous reset type preamplifier (13) having an CR circuit (13a) does not exceed a predetermined upper limit value, and output a Low signal when the level of the signal from the preamplifier (13) exceeds the predetermined upper limit value; and a control section (18) configured to delay shift of the signal of the comparator (17) from Low to High by a predetermined time, to perform output to a clock oscillator (15), stop oscillation by outputting a Low signal to the clock oscillator (15), and thus stop high-speed AD conversion by a high-speed AD converter (14) and maintain an output value.

Abstract: The X-ray analyzing apparatus according to the present invention includes, in combination: a first correcting unit (13A, 13B) to output a first gain to cause a pulse height of a target peak which is estimated on the basis of a sum of counting rates obtained in preliminary measurement, to match a predetermined expected pulse height; and a second correcting unit (14A, 14B) to output, in real time through feedback control, a second gain to be added to the first gain in order to cause the pulse height of the target peak detected within a predetermined energy range, to match the expected pulse height, and further includes a feedback control stopping unit (16A, 16B) to appropriately determine presence/absence of an interfering line with respect to the target peak, and to set, when determining that the interfering line exists, the gain to a fixed value including only the first gain.

Abstract: The X-ray analyzing apparatus according to the present invention includes, in combination: a first correcting unit (13A, 13B) to output a first gain to cause a pulse height of a target peak which is estimated on the basis of a sum of counting rates obtained in preliminary measurement, to match a predetermined expected pulse height; and a second correcting unit (14A, 14B) to output, in real time through feedback control, a second gain to be added to the first gain in order to cause the pulse height of the target peak detected within a predetermined energy range, to match the expected pulse height, and further includes a feedback control stopping unit (16A, 16B) to appropriately determine presence/absence of an interfering line with respect to the target peak, and to set, when determining that the interfering line exists, the gain to a fixed value including only the first gain.

Abstract: An X-ray detection signal processing device (10) and the like according to the present invention includes: a comparator (17) configured to output a High signal when a level of a signal from a continuous reset type preamplifier (13) having an CR circuit (13a) does not exceed a predetermined upper limit value, and output a Low signal when the level of the signal from the preamplifier (13) exceeds the predetermined upper limit value; and a control section (18) configured to delay shift of the signal of the comparator (17) from Low to High by a predetermined time, to perform output to a clock oscillator (15), stop oscillation by outputting a Low signal to the clock oscillator (15), and thus stop high-speed AD conversion by a high-speed AD converter (14) and maintain an output value.

Abstract: Conjointly provided are a first correcting unit (13A, 13B) to estimate, on the basis of the whole sum of counting rates determined by a counting unit (10A, 10B), a peak position in an energy spectrum obtained in the counting unit (10A, 10B) and to output an initial value which is a gain value required to render the estimated peak position to coincide with a reference position, and a second correcting unit (14A, 14B) to detect, in the energy spectrum obtained in the counting unit (10A, 10B), the peak position within a predetermined energy range containing the reference position and to output a dynamic gain correction value which is a gain value required to render the detected peak position to coincide with the reference position.

Abstract: An X-ray detection signal processing apparatus of the present invention is such that after a signal from a preamplifier has been converted into a digital signal at a high speed by means of a high speed analog-to-digital converter (1), a process for removing influences brought about by a component that has been decayed by a differential time constant in the preamplifier is performed on a digital basis in a digital signal processing block (2). An event detecting unit (3) within the digital signal processing block (2), smoothen the signal from the high speed analog-to-digital converter (1) for a predetermined shaping time with the use of a filter function for high speed shaping, detects as an event information the timing at which the smoothened signal exceeds a predetermined threshold and attains the maximum value, and add such event information to the signal from the high speed analog-to-digital converter (1).

Abstract: An X-ray detection signal processing apparatus of the present invention is such that after a signal from a preamplifier has been converted into a digital signal at a high speed by means of a high speed analog-to-digital converter (1), a process for removing influences brought about by a component that has been decayed by a differential time constant in the preamplifier is performed on a digital basis in a digital signal processing block (2). An event detecting unit (3) within the digital signal processing block (2), smoothen the signal from the high speed analog-to-digital converter (1) for a predetermined shaping time with the use of a filter function for high speed shaping, detects as an event information the timing at which the smoothened signal exceeds a predetermined threshold and attains the maximum value, and add such event information to the signal from the high speed analog-to-digital converter (1).

Abstract: A method for producing a hollow piston for compressor by coupling a piston top side member and a rotation preventing portion side member where a rotation preventing portion and a cylindrical portion are formed integrally. When the rotation preventing portion side member is formed, an intermediate material for forging the rotation preventing portion side member is formed, the cylindrical portion of the rotation preventing portion side member is forged in a uniaxial direction by molding for pushing the cylindrical portion rearward in a punch inserting direction using a punch having a tip portion formed asymmetrically to a piston axis, and a material theft portion is formed to copy the asymmetric profile at the tip of the punch on the rotation preventing portion side bottom of the hollow section for forming the cylindrical portion. A hollow piston can be produced by simple and inexpensive forging and the position of the center of gravity can be brought closer to the axis of the cylindrical portion of the piston.