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Delay eliminating method for signal of self-powered rhodium detector based on Luenberger-form H-infinity filtering

A self-powered detector and signal delay technology, applied in radiation measurement, neutron radiation measurement, instruments, etc., can solve the problems that statistical characteristics are difficult to obtain and difficult to apply

Inactive Publication Date: 2015-09-02
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the elimination of signal delay applied to rhodium self-powered 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 finite energy Uncertain signals, whose statistical properties are difficult to obtain, the method is difficult to apply

Method used

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  • Delay eliminating method for signal of self-powered rhodium detector based on Luenberger-form H-infinity filtering
  • Delay eliminating method for signal of self-powered rhodium detector based on Luenberger-form H-infinity filtering
  • Delay eliminating method for signal of self-powered rhodium detector based on Luenberger-form H-infinity filtering

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Embodiment

[0073] Such as figure 1 The structure diagram of rhodium self-sufficient neutron detector shown, in which 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 end, the rhodium self-sufficient energy neutron detector, its characteristic parameter is: λ 1 =ln2 / 42.3s -1 =0.016386s -1 ,λ 2 =ln2 / 4.34 / 60s -1 =0.00266186s -1 , c=0.06, a 1 =0.879,a 2 =0.061; image 3 It is the principle process diagram of rhodium and neutron nuclear reaction, for image 3 During the reaction process, the figure 1 device for measurement. Such as figure 2 As shown, the rhodium self-powered detector signal delay elimination method based on the Luenberger form H∞ filter includes the following steps in sequence: step 1, establish the nuclear reaction model of rhodium and thermal neutrons; step 2, use the decoupling transformation t...

Embodiment 2

[0127] 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:

[0128] In the shift area (k 1 ≤k≤k 2 ), assuming that the neutron flux density remains constant, then:

[0129] n(k+1)=n(k) (18)

[0130] x 1 ( k + 1 ) = 1 c ( a 1 - a 2 · g / λ 1 ) · ( 1 - e - λ 1 · Ts ) n ...

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Abstract

The invention discloses a delay eliminating method for a signal of a self-powered rhodium detector based on Luenberger-form H-infinity filtering. The delay eliminating method sequentially comprises the following steps of 1, establishing a nuclear reaction model of rhodium and thermal neutrons; 2, establishing a discrete state equation corresponding to the nuclear reaction model through decoupling transform; 3, determining the instant response share of the current of the self-powered rhodium detector; and 4, carrying out delay elimination on a current signal of the self-powered rhodium detector by using a Luenberger-form H-infinity filter. When the delay eliminating method is applied, a current signal of a self-powered rhodium neutron detector can be subjected to delay elimination, and noise can also be effectively inhibited, so that the self-powered rhodium neutron detector can also be normally used under the instantaneous condition of a reactor; in addition, due to the adoption of the Luenberger-form H-infinity filter, the statistical property of an external disturbance input signal is not needed to be known in advance during delay elimination.

Description

technical field [0001] The invention relates to a signal processing technology of a rhodium self-supplied neutron detector used in a nuclear reactor power distribution on-line monitoring system, in particular to a method for eliminating the signal delay of the rhodium self-supplied detector based on Luenberger form H∞ filtering. Background technique [0002] The rhodium self-supplied neutron detector used as the in-core detector of the advanced core measurement system, the secondary nuclide produced by the reaction of the sensitive material rhodium 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 by measuring the rhodium self-powered detector can infer the neutron flux at its location. 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 changes), t...

Claims

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Application Information

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IPC IPC(8): G21C17/108G01T3/00G06F19/00
CPCG01T3/00G16C99/00G21C17/108Y02E30/30
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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