JPH02219000A - Automatic control device for X-ray equipment - Google Patents

Abstract

PURPOSE:To facilitate an operation and to reduce false setting by a method wherein an identification code is displayed in an X-ray tube bulb and the upper and lower limit values of a selected pulse height of a pulse-height selector are set to be optimum values in accordance with the kind of the X-ray tube bulb discriminated from the identification code. CONSTITUTION:CPU 4 extracts from a memory 3 the upper and lower limit values of a selected pulse height of a pulse-height selector 5 corresponding to a bar code of an X-ray tube bulb 1 read by a bar code reading device 2 and sets these values in the selector 5. Moreover, the optimum value of an impression voltage on a filament of the tube bulb 1 is selected out of the memory 3 and the impression voltage on the filament is adjusted to be said optimum value. An X-ray is applied onto a sample by the tube bulb 1 and the X-ray diffracted by the sample is detected 7. On the X-ray detector 7, the X-ray having a pulse height distribution wherein the density of a pulse having a pulse height corresponding to the wavelength of the X-ray is high is incident, and the pulse having the pulse height corresponding to the wavelength of the incident X-ray is inputted to the selector 5. The selector 5 selects the pulse within a prescribed range on the basis of the upper and lower limit values which are set and counts the selected pulse, and a counted value thereof is displayed 8 as a measured value.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides an X-ray diffraction apparatus that automatically and optimally selects pulse height values of X-ray detection pulses according to the type of X-ray tube used. Regarding equipment to be set up (prior art) When measuring diffracted X-rays, etc. using an X-ray diffraction device, it is necessary to change the irradiated X-rays to X-rays with the optimum wavelength depending on the sample, and the X-ray tube may vary depending on the sample. Therefore, the detection wavelength of diffracted X-rays differs depending on the type of X-ray tube used. Since X-rays other than diffracted X-rays are incident on the X-ray detector, in order to remove X-rays other than diffracted X-rays (background), X-rays are detected with a proportional counter, etc., and the wavelength From the detected pulses, only pulses with a peak value corresponding to the diffracted X-ray wavelength are selected by a pulse height selector and counted. If the wavelength of the diffracted X-rays to be detected is changed, the selection wave height value of the wave height selector must be changed. Conventionally, this change procedure was carried out by manually changing the selection wavelength value of the wave height selector each time the type of X-ray tube was changed. However, with this method, there is a problem that it takes time and effort to change, and setting errors are likely to occur during the change.

(Problems to be Solved by the Invention) The present invention provides an X-ray diffraction apparatus that automatically determines the type of X-ray tube each time the X-ray tube is replaced, and selects a selected wave that is compatible with the X-ray tube. The purpose is to set the wave height selector to the highest value.

(Means for Solving the Problem) As an automatic control device for an X-ray device, an identification code reading means for displaying an identification code on an X-ray tube and reading the displayed identification code, and a pulse height selector for X-ray detection pulses are provided. and screening wave height value setting means for setting the upper and lower limit values of the screening wave height to optimum values according to the type of X-ray tube determined by the identification code reading means.

(Function) In an X-ray diffraction device, the wave height selection value of the wave height selector must be adjusted depending on the type of X-ray tube. Conventionally, these settings were manually performed, but the present invention By adding an identification code to the tube and having the identification code read by an identification code reader, the type of X-ray tube can be automatically identified, and the identification signal can be used to determine the wave height selection value of the above-mentioned wave height selector. It attempts to automatically adjust the

(Example) FIG. 1 shows an example of the present invention.
is an X-ray tube with an identification code used in the X-ray diffraction device 6. Reference numeral 2 denotes an identification code reader for reading an identification code, such as a bar code, displayed on the X-ray tube 1, and 3 a memory, which is a table of upper and lower limit values of screening wave heights of the wave height sorter 5 corresponding to the above-mentioned identification code. and a table of optimal applied voltages for the X-ray tube filament is memorized. 4 is C
The PU extracts from the memory 3 the upper and lower limits of the wave height for selection by the wave height selector 5 that are adapted to the identification code of the X-ray tube 1 read by the identification code reader 2, and extracts the wave height values for the selection by the wave height selector 5. are set as the upper and lower limits of the extracted screening wave height, and the optimum value of the voltage applied to the X-ray tube filament is selected, and the voltage applied to the X-ray tube filament is adjusted to the optimum value. In the measurement operation, the X-ray tube 1 irradiates the sample with X-rays, and the X-rays diffracted by the sample are transmitted to the X-ray detector 7.
Detect with. As shown in FIG. 2, X-rays with a pulse height distribution having a high density of pulses having a wave height corresponding to the X-ray wavelength emitted from the X-ray tube are incident on the detector 7. The X-ray detector 7 inputs pulses having a wave height corresponding to the incident X-ray wavelength to the wave height selector 5. As shown in FIG. 2, the pulse height selector 5 sorts pulses in the wavelength range corresponding to the X-ray wavelength to be measured (pulses between PI and P2) according to the upper and lower limit values set above, and The selected pulses are counted and the counted value is displayed on the display device 8 as a measured value.

(Effects of the Invention) According to the present invention, the screening wave height value of the wave height selector and the voltage applied to the filament of the X-ray tube can be automatically set in accordance with the type of X-ray tube. , operation has become easier and incorrect settings have been reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a detection pulse height distribution diagram of a detector using X-rays emitted from an X-ray tube. 1... X-ray tube with identification code, 2... identification code reader, 3... memory, 4... CPU, 5...
Wave height sorter, 6... X-ray diffraction device, 7... X-ray detector, 8... Display device. Figure 1 Figure 2

Claims (1)

[Claims] an identification code reading means for reading an identification code displayed on the X-ray tube; and a selection wave height upper and lower limit value of a wave height selector for X-ray detection pulses according to the type of X-ray tube determined by the identification code reading means. 1. An automatic control device for an X-ray apparatus, comprising a screening wave height value setting means for setting an optimum value according to the selection wave height value.