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

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

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

[0071] 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 direct transformation to establ...

Embodiment 2

[0108] 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:

[0109] In the shift area (k 1 ≤k≤k 2 ), assuming that the neutron flux density remains constant, then:

[0110] n(k+1)=n(k) (11)

[0111] J a ( k + 1 ) = e - λ 1 · Ts J a ( k ) + λ 2 · ( 1 - e - λ 1 · Ts ...

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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 direct 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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