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Data acquisition serial-parallel conversion storage device and method

A data collection and storage device technology, applied in the direction of logic circuit connection/interface layout, etc., can solve the problems of low sampling accuracy and inaccurate collection information, and achieve the effect of increasing the measurement range, improving accuracy, and reducing requirements

Inactive Publication Date: 2012-07-04
SHANGHAI UNIV +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The primary purpose of the present invention is to provide a serial-to-parallel conversion storage device for data collection to ensure effective storage of collected data in order to solve the technical problems of low sampling accuracy and inaccurate collection information in the prior art

Method used

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  • Data acquisition serial-parallel conversion storage device and method
  • Data acquisition serial-parallel conversion storage device and method

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Embodiment

[0031] The time-of-flight mass spectrometer includes ion source, ion extraction pulse electrode, ion extraction lens, vertical introduction time-of-flight mass spectrometer, ion selective repulsion electrode, MCP (Microchannel Plate) ion detector. After the sample passes the time-of-flight mass spectrometer, the separated signal enters the high-speed data acquisition system, is stored by the serial conversion and conversion storage device of the present invention, and is finally read by the computer after data processing. The ion source can be any ion source, including an electron bombardment source capable of continuously generating ions, a chemical ionization source, a glow discharge ion source, an electrospray source under atmospheric pressure, or a pulsed ion source, such as laser ionization Source etc. The high-speed data acquisition system includes a front-end analog conditioning circuit, an ADC sampling circuit, the serial-to-parallel conversion storage device of the pre...

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Abstract

The invention discloses a data acquisition serial-parallel conversion storage device and method for ensuring the effective storage of data. The data acquisition serial-parallel conversion storage device comprises a serial shift register, a first parallel shift register, a second parallel shift register, a phase locked loop (PLL) circuit, a frequency dividing circuit and a counting circuit, wherein the serial shift register, the first parallel shift register and the second parallel shift register are sequentially connected; the phase locked loop (PLL) circuit is connected with the serial shift register; the frequency dividing circuit is respectively connected with the first parallel shift register and the second parallel shift register; the counting circuit is connected with the first parallel shift register; the serial shift register receives an output signal of a receiver; the second parallel shift register is connected with a logical circuit; and the phase locked loop (PLL) circuit is respectively connected with the counting circuit and the frequency dividing circuit.

Description

Technical field [0001] The invention relates to a time-of-flight mass spectrometer detection technology, in particular to a data acquisition serial-parallel conversion storage device and method in a time-of-flight mass spectrometer. Background technique [0002] The time-of-flight mass spectrometer (TOFMS) judges the mass-to-charge ratio of different ions according to the flight time of different ions in vacuum. The analysis speed is fast and it can detect a single charge. In practical applications, the measurement of time-of-flight mass spectrometry does not only rely on the flight time of the ion beam emitted by an ion pulse generator, but on the accumulation of many ion pulse signals. Each time the ion pulse generator is triggered to become a transient, the data acquisition system of the time-of-flight mass spectrometer records a set of spectral lines each transient. Each time the recorded spectrum is superimposed to the expected number, a complete spectrum is obtained. Beca...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175
Inventor 黄正旭薛兵高伟董俊国傅忠周振
Owner SHANGHAI UNIV
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