Carbon dioxide concentration monitoring system based on computer

Abstract

The invention discloses a greenhouse carbon dioxide concentration monitoring system based on a computer, which is characterized by comprising a carbon dioxide concentration sensor, a temperature sensor, a numerical value processing unit, a light sensor and a control unit, wherein the temperature sensor is connected with the first input end of the numerical value processing unit; the output end of the carbon dioxide concentration sensor is connected with the second input end of the numerical value processing unit; the output end of the numerical value processing unit is connected with the first input end of the control unit; the output end of the light sensor is connected with the second input end of the control unit; and according to data of the light sensor, the control unit controls a carbon dioxide cylinder to output a flow and carries out concentration overload alarming. A carbon dioxide concentration compensation and temperature relationship curve is acquired, and according to the acquired carbon dioxide measurement concentration and the carbon dioxide compensation value, an equivalent carbon dioxide concentration is acquired; and finally, according to the carbon dioxide concentration and the light information, the output flow of the carbon dioxide cylinder is controlled, and the purpose of precisely controlling the carbon dioxide in the greenhouse is achieved.

Description

technical field [0001] The invention relates to the field of carbon dioxide concentration measurement, in particular to a carbon dioxide concentration measurement system. Background technique [0002] CO 2 It is one of the main raw materials for photosynthesis of green plants. For every 100g of dry matter produced by plants, it needs to absorb 150g of CO 2 . Greenhouse cultivation keeps crops in a relatively closed place for a long time, and the CO in the shed 2 The consumption is large, and the CO 2 Concentrations are monitored and consumption compensated. Crops need CO 2 The concentration is generally 1‰~1.5‰. CO 2 If the concentration of CO2 is too low, the photosynthesis of the leaves will basically stop, which seriously hinders the growth of crops. It is necessary to supplement the deficiency of this gas in the shed by increasing the application of CO2. At the same time, when the CO2 concentration is too high, it will cause the leaves of vegetable crops to curl,...

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Problems solved by technology

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a computer-based carbon dioxide concentration monitoring system, which aims to solve the technical problem of poor accuracy caused by the temperature drift of the carbon dioxide sensor, and achieve improved carbon dioxide concentration measurement. purpose of precision

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