Method for automatically regulating balance between CO2 and O2 in sealed system

A closed system and balanced technology, applied in the direction of various fluid ratio control, etc., can solve problems such as long response time

Inactive Publication Date: 2010-09-29
BEIHANG UNIV
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Problems solved by technology

In this case, you can choose to change the recipe of the crew to adjust, the disadvantage is that it takes a relatively long reaction time (about 10 days), and you can also change the type of higher plants to recover, which also takes a long time ( 30-60 days), such a long recovery time is fatal for small artificial ecological environments like BLSS, therefore, it is necessary to develop a 2 and O 2 A balanced approach is imperative

Method used

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  • Method for automatically regulating balance between CO2 and O2 in sealed system
  • Method for automatically regulating balance between CO2 and O2 in sealed system
  • Method for automatically regulating balance between CO2 and O2 in sealed system

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Embodiment Construction

[0010] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0011] Use CO 2 Concentration sensor monitors CO in a closed system 2 The concentration and the signal enter the LabView platform through the numerical acquisition board, and then pass into the MatLab / Simulink controller simulation algorithm through the NIsimulation interface kit (SIT) interface ( figure 2 ), first calibrate the signal, then low-pass filter, the CO in the pre-set closed system 2 The concentration reference value is subtracted from it, and passed into the proportional-integral (PI) controller to calculate the light intensity value, enters the LabView platform through SIT, and passes through the signal amplifier to change the light of the photobioreactor LED light source by adjusting the current pulse width Strong, adjust the light intensity to the calculated light intensity value, thereby affecting the photosynthetic r...

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Abstract

The invention relates to a method for automatically regulating the balance between CO2 and O2 in a sealed system, which mainly aims at the problem of the balance between the CO2 and the O2 in a bioregenerative life support system (BLSS) of a long-time and remote manned space base (such as a moon permanent base, a Mars base and the like). In the invention, a simulation model of a CO2 controller of the sealed system in a MatLab / Simulink is established, the simulation model of the controller serving as the actual controller is connected with hardware by taking LabVIEW software as a platform; and the current of an LED light source is adjusted by monitoring the concentration of the CO2 in the sealed system so as to change the light intensity of the light source, influence the photosynthesis speed of a microalgae, and also influence the concentration of the CO2 and the O2 in the sealed system; and the aim of automatically regulating the balance between the CO2 and the O2 in the sealed system is fulfilled.

Description

Technical field [0001] The invention relates to a CO in an automatically regulated closed system 2 And O 2 The balanced method is mainly aimed at CO in long-term, long-distance space manned bases (such as permanent bases on the moon, Mars bases, etc.) in the Bioregenerative Life Support System (BLSS) 2 And O 2 Balance problem. Background technique [0002] The Bioregenerative Life Support System (BLSS) is a key technology for manned spaceflight. It uses higher plants and microorganisms to produce food, process waste, and regenerate air and water to provide materials for astronauts’ life activities. Guaranteed independent, complete and complex system. Among them, maintain the gas in the system (mainly CO 2 And O 2 The balance of) is an important guarantee for the safety and reliability of BLSS. [0003] Higher plants are the core component of BLSS, providing food, water regeneration and O 2 Of regeneration. However, studies have shown that there may be a sudden lack of harvest of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D11/13
Inventor 刘红李明胡大伟
Owner BEIHANG UNIV
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