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Method for eliminating signal delay of silver-self-powered detector on basis of H2 filtering with form of Luenberger

A self-sufficient detector and signal delay technology, used in radiation measurement, neutron radiation measurement, instruments, etc., can solve the problems of difficult to obtain statistical characteristics and difficult to apply.

Inactive Publication Date: 2015-07-15
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the elimination of signal delay applied to silver self-sufficient detectors is mainly based on the Kalman filter. It must be assumed that the external disturbance input signal of the system is a white noise signal with known statistical characteristics. When the input signal is a signal with finite energy Uncertain signals, whose statistical properties are difficult to obtain, the method is difficult to apply

Method used

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  • Method for eliminating signal delay of silver-self-powered detector on basis of H2 filtering with form of Luenberger
  • Method for eliminating signal delay of silver-self-powered detector on basis of H2 filtering with form of Luenberger
  • Method for eliminating signal delay of silver-self-powered detector on basis of H2 filtering with form of Luenberger

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Embodiment

[0080] Such as figure 1 The structure diagram of the silver self-sufficient neutron detector is shown, and the names of the components of each serial number correspond to: 1—emitter, 2—insulation layer, 3—collector, 4—wire, 5—protective shell, 6—insulation Cable, 7-current line, 8-base line, 9-sealed tube, 10-current output terminal, the characteristic parameters of the silver self-sufficient neutron detector are: λ 108 =ln2 / 2.42 / 60s -1 =0.0048s -1 ,λ 110 =ln2 / 24.4s -1 =0.0284s -1 , p=0.09, q=0.66, r=0.25; image 3 It is the principle process diagram of silver and neutron nuclear reaction, for image 3 During the reaction process, the figure 1 device for measurement. Such as figure 2 As shown, the signal delay elimination method for silver self-supplied detectors based on Luenberger-type H2 filtering includes the following steps in sequence: Step 1, establishing the nuclear reaction model of silver and thermal neutrons; Step 2, using decoupling transformation to esta...

Embodiment 2

[0125] This embodiment makes the following further limitations on the basis of Embodiment 1: In the case of shifting, the step 4 adopts the following method to eliminate delay:

[0126] In the shift area (k 1 ≤k≤k 2 ), assuming that the neutron flux density remains constant, then:

[0127] n(k+1)=n(k) (16)

[0128] x 1 ( k + 1 ) = e - λT s 108 x 1 ( k ) + q p · ( 1 - e - λT s 108 ...

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Abstract

The invention discloses a method for eliminating the signal delay of a silver-self-powered detector on the basis of H2 filtering with the form of Luenberger. The method comprises the following successive steps: (1) establishing a nuclear-reaction model of silver and thermal neutrons; (2) establishing a discrete state equation corresponding to the nuclear-reaction model by adopting decoupling transformation; (3) determining instantaneous response portion of current of the silver-self-powered detector; and (4) carrying out delay elimination on current signals of the silver-self-powered detector by adopting an H2 filter with the form of Luenberger. The method disclosed by the invention has the advantages that in application, the delay elimination processing can be carried out on the current signals of the silver-self-powered neutron detector, the noise can be effectively suppressed, so that the silver-self-powered neutron detector also can be normally used when in an instantaneous condition of a reactor; and since the H2 filter with the form of Luenberger is adopted, the statistical characteristic of external disturbance input signals do not need to be known in advance when the delay elimination is carried out.

Description

technical field [0001] The invention relates to the signal processing technology of the silver self-sufficient neutron detector signal in the nuclear reactor power distribution online monitoring system, specifically based on the Luenberger form H 2 Filtered Silver Self-Energy Detector Signal Delay Elimination Method. Background technique [0002] The silver self-sufficient neutron detector used as the detector in the core of the advanced core measurement system, the secondary nuclide produced by the reaction of the sensitive material silver and the neutron undergoes beta decay to generate a current, and the magnitude and location of the current in a steady state The flux is directly proportional, so the neutron flux at its location can be deduced by measuring the silver self-supplied energy detector. Since the main component of this type of detector current is produced by the β decay of secondary nuclides, in the transient state of the reactor (the neutron flux level change...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/108G01T3/00G06F19/00
CPCG01T3/00G16Z99/00G21C17/108Y02E30/30
Inventor 彭星杰李庆龚禾林陈长赵文博刘启伟李向阳于颖锐
Owner NUCLEAR POWER INSTITUTE OF CHINA
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