multi-channel seawater nutritive salt detector control system and control method based on a CAN bus

Abstract

The invention discloses a multi-channel seawater nutritive salt detector control system and control method based on a CAN bus. the control system comprises a control node and a parameter acquisition node; The control node comprises a single-chip microcomputer minimum system module with a built-in microcontroller, a filter pump driving module, a floating ball liquid level switch, a data storage module, a CAN communication module and an upper computer communication module, wherein the filter pump driving module, the floating ball liquid level switch, the data storage module, the CAN communication module and the upper computer communication module are electrically connected with the microcontroller. According to the control system disclosed by the invention, five nutrient salt parameter concentrations are accurately measured at the same time, the whole system is divided into a control node and a parameter acquisition node, and a large function is decomposed into sub-functions to be realized respectively; Hardware design adopts a modular design thought, and all modules are combined to achieve a set target, so that the size of the control system is small, the integration level and the automation degree are high, and subsequent function addition and system upgrading are facilitated.

Description

technical field [0001] The invention belongs to the field of instruments and meters, in particular to a CAN bus-based multi-channel seawater nutrient detector control system and control method in the field. Background technique [0002] Seawater nutrient salt is an essential nutrient element for the growth of marine plankton and the material basis for its life activities. As one of the basic parameters of marine biogeochemical research, seawater nutrients usually refer to five kinds of nitrate, nitrite, silicate, phosphate and ammonium salt in seawater. [0003] The traditional detection of nutrient content is based on the on-site sampling-laboratory analysis method of the survey ship. This method has disadvantages such as poor real-time performance, easy contamination of samples, waste of manpower and material resources, and the on-site sampling-laboratory analysis method cannot provide continuous fixed-point analysis. The measurement data cannot timely reflect the rapid c...

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Problems solved by technology

[0003] The traditional detection of nutrient content is based on the on-site sampling-laboratory analysis method of the survey ship. This method has disadvantages such as poor real-time performance, easy contamination of samples, waste of manpower and material resources, and the on-site sampling-laboratory analysis method cannot provide continuous fixed-point analysis. Measurement data cannot timely reflect the rapid changes in nutrient content when ecological and hydrological phenomena such as red tides and rainfall occur

At present, in order to solve this problem, researchers at home and abroad have designed and developed different automatic analyzers for seawater nutrients, but most of them are still in the stage of laboratory measurement, and the five nutrient parameters can only be measured sequentially, not simultaneously. It takes a long time to complete a standard process, which cannot meet the requirements for efficient and rapid measurement of nutrient parameters

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