Delay eliminating method for signal of self-powered rhodium detector based on H2/H-infinity hybrid 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 H2/H-infinity hybrid filtering
  • Delay eliminating method for signal of self-powered rhodium detector based on H2/H-infinity hybrid filtering
  • Delay eliminating method for signal of self-powered rhodium detector based on H2/H-infinity hybrid filtering

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Embodiment

[0077] Such as figure 1 The structure diagram of rhodium self-sufficient neutron detector shown, in which the names of the parts 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 parameter of this rhodium self-supplied energy neutron detector 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 H2 / H∞ hybrid filtering includes the following steps in sequence: step 1, establish the nuclear reaction model of rhodium and thermal neutrons; step 2, use direct transformation to establish ...

Embodiment 2

[0123] This embodiment makes the following further limitations on the basis of Embodiment 1: In the case of shifting, this embodiment also includes processing the original signal according to the following signal processing method: in the shifting area, assuming The sub-flux remains unchanged, and then the current signal generated by the neutron flux density is reversed, and then subtracted from the actual output current of the detector to obtain the shifting mutation component; outside the shifting area, the detector output current minus the shifting The mutation component is obtained to obtain the current signal generated by the neutron flux density, and then the delay elimination process is performed on this current signal.

[0124] The shift area design structure of the present embodiment is as follows: in the shift area (k 1 ≤k≤k 2 ), assuming that the neutron flux density remains constant, then:

[0125] n(k+1)=n(k) (15)

[0126] J a ...

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Abstract

The invention discloses a delay eliminating method for a signal of a self-powered rhodium detector based on H2 / H-infinity hybrid 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 an H2 / H-infinity hybrid 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, the self-powered rhodium neutron detector can also be normally applied when an input signal is an indeterminable signal with limited energy.

Description

technical field [0001] The present invention relates to the processing technology of rhodium self-supplied energy neutron detector signal used in the advanced core measurement system (nuclear reactor power distribution on-line monitoring system), specifically the rhodium self-supplied energy detector signal delay elimination based on H2 / H∞ hybrid filtering method. 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 reacto...

Claims

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Application Information

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IPC IPC(8): G21C17/108G01T3/00G06F19/00
CPCG01T3/00G16Z99/00G21C17/108Y02E30/30
Inventor 龚禾林陈长彭星杰赵文博刘启伟李向阳李庆于颖锐
Owner NUCLEAR POWER INSTITUTE OF CHINA
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