An intelligent electronic device, a QXAFS (quick X-ray absorption fine structure) system and a data acquisition and motor control method
A technology of electronics and acquisition circuit, applied in the direction of motor generator control, control system, electrical components, etc., can solve the problems of XAFS oscillation waveform distortion, spectrum deformation in the energy axis, no synchronization interface, etc., to overcome the speed limit of spectrum acquisition. limited effect
A technology of electronics and acquisition circuit, applied in the direction of motor generator control, control system, electrical components, etc., can solve the problems of XAFS oscillation waveform distortion, spectrum deformation in the energy axis, no synchronization interface, etc., to overcome the speed limit of spectrum acquisition. limited effect
CN103234986BActive Publication Date: 2015-03-18INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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[0071] figure 2 Schematically shows the structural block diagram of the QXAFS experimental system of the embodiment of the present application. Synchrotron radiation X-rays are incident on the twin-crystal monochromator 101, and monochromatic monochromatic X-rays through the twin-crystal monochromator 101 enter the ionization chamber detector 103 located in front of the sample, the sample, and the ionization chamber detector located behind the sample 103 (can also have a third ionization chamber X-ray detector to detect the standard sample at the same time).
[0072] The current angle of the twin crystal monochromator 101 can be detected by the shaft angle encoder 109 and displayed by the display 110 and transmitted to the computer 108 .
[0073] The roll angle and pitch angle of the twin-crystal monochromator 101 are driven by a linear motor driver 112, which is connected with a computer 108 to realize manual / automatic control.
[0074] The weak current signal output by th...
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The application discloses an intelligent electronic device, a QXAFS (quick X-ray absorption fine structure) system and a data acquisition and motor control method. The intelligent electronic device replaces a stepper motor controller and a scaler in a conventional XAFS (X-ray absorption fine structure) experimental system; and by employing a programmable device as a core component, the electronic device realizes analog acquisition via a multi-channel ADC acquisition circuit combining with a current amplifier in the quick XAFS system, or realizes integral form data acquisition by using the counting function of a programmable device combining a V / F converter on the quick XAFS system. The programmable device controls the stepper motor through reading a control curve configured in a RAM, while performs data acquisition in a control segment allowing the data acquisition, thus achieving a high-speed synchronization of the stepper motor and the data acquisition, and through sampling data in the stationary or slow control segment of the control curve, preventing energy movement in the process of data acquisition, and obtaining a best solution in the contradiction between a spectrum sweep speed and the energy movement.
Description
technical field [0001] This application relates to the modern material structure analysis method - synchrotron radiation experiment method, especially to a kind of intelligent electronic equipment, fast XAFS experiment system and Data acquisition and stepper motor control methods in a fast XAFS experiment implemented using this smart electronics device. Background technique [0002] The modern XAFS experimental system is a tool for large-scale material structure analysis and research based on synchrotron radiation devices. Its basic principle is to irradiate the sample to be studied with single-energy X-rays, and gradually change the energy of single-energy X-rays within a specific X-ray energy range. Energy scanning is realized, and the intensity of X-rays before and after the sample is detected at the same time, so as to obtain the absorption line of the sample in a specific energy range, and the microstructure information of the sample can be obtained by analyzing the abs...
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Patent Timeline
18 Mar 2015
Publication
CN103234986B
- IPC
- G01N23/02; H02P8/00
- Inventors
- 谢亚宁; 张静