CN205124752U - Directional oxygenation device of aquaculture intelligence - Google Patents

Abstract

The utility model relates to a directional oxygenation device of aquaculture intelligence, including dissolving oxygen sensor, radio communication node, oxygen -increasing machine and PLC programmable controller, the oxygen sensor that dissolves set up 0.5~0.6m department under breeding each regional surface of water of pond, the output that dissolves oxygen sensor connect the input of modulate circuit, the output of modulate circuit connect the radio communication node, the radio communication node be connected with the basic station through wireless connection, the basic station pass through the RS -485 order wire and connect PLC programmable controller, the PLC programmable logic controller control oxygen -increasing machine the start -up or close. The utility model discloses open and close many oxygen -increasing machine extensive style oxygenation modes with ordinary the time and compare, realized by the transformation of the automatic oxygenation of extensive mechanical type to the automatic oxygenation mode that becomes more meticulous.

Description

A kind of aquaculture intelligent positioning oxygen-increasing device

Technical field

The utility model relates to control and regulation field, especially a kind of culturing pool water body dissolved oxygen concentration subregion wireless measurement large to aquaculture area, according to the device of the actual conditions intelligent positioning oxygenation of each region soluble oxygen change.

Background technology

In aquaculture, Dissolved Oxygen in Water content is vital water quality factor in aquaculture, especially careless slightlyly in current high-density aquiculture easily causes fishes and shrimps large area death by suffocation, particularly important to the automatic Measurement & Control of Dissolved Oxygen in Water.

Dissolved Oxygen in Water content is unbalanced, and spot measurement is difficult to the actual conditions accurately reflecting content, and the wired measuring cost of multiple spot is too high, and wiring is complicated, and therefore wireless sensing measurement is applicable mode, and each node adopts lithium battery power supply.

Effective and the most economic current oxygenation way is mechanical enhancement, China's aquaculture more than 80% mechanical enhancement adopts impeller automatic aerator, impeller automatic aerator work can impel the oxygen in air to spread to water body, increase air and water body contact area, Diffusion Law can be derived by Fick's law and double-film theory and be obtained:

$\frac{dM}{dt}=D_L\·A\·\left(\frac{C_S-C}{X_f}\right)---\left(1\right)$

Wherein M represents in unit interval t by amount of material that interface is spread; DL is diffusion coefficient; A represents interfacial area; Cs represents the material concentration value that air and liquid level intersection needs spread; C is material concentration; The thickness of liquid film is Xf.From formula (1) during emergent oxygenation, when Dissolved Oxygen in Water content value C is increased to certain value, the operating efficiency of aerator is more and more lower.

The culturing pool that area is large needs multiple stage aerator, but whole culturing pool water body dissolved oxygen content is subject to the objective condition such as wind-force, sunshine and geographical position affects not only levels, and same depth profile difference is also very large, if whole culturing pool water body dissolved oxygen content is integrally measured, open and close multiple stage aerator simultaneously, when certain region soluble oxygen content exceedes closedown threshold values, and whole culturing pool dissolved oxygen content average do not reach close threshold values time, this region aerator works on, according to formula (1), oxygenation efficiency significantly reduces.

Utility model content

The technical problems to be solved in the utility model is: provide a kind of aquaculture intelligent positioning oxygen-increasing device, by radio sensing network to large area aquaculture pond Dissolved Oxygen in Water content zoning monitoring and control, reach by the transformation of extensive mechanical type automatic aeration to the automatic aeration mode that becomes more meticulous.

The utility model solves the technical scheme that its technical problem adopts: a kind of aquaculture intelligent positioning oxygen-increasing device, comprises dissolved oxygen sensor, wireless communication node, aerator and PLC; Described dissolved oxygen sensor is arranged at 0.5 ~ 0.6m place, underwater, culturing pool each region; The output of described dissolved oxygen sensor connects the input of modulate circuit; The output of described modulate circuit connects wireless communication node; Described wireless communication node is connected with base station by radio connection; Described base station connects PLC by RS-485 order wire; Described PLC controls startup or the closedown of aerator.

Wireless communication node described in the utility model adopts low power consumption adaptive to hive off layered protocol, comprises microprocessor, A/D interface and RF radio-frequency antenna; The output of described modulate circuit is connected with A/D interface; Wireless communication node is connected with base station by RF radio-frequency antenna; Described modulate circuit and wireless communication node are by lithium battery power supply.

Method comprises the following steps:

1) culturing pool is divided into multiple region, each region forms one bunch by multiple measured node, dissolved oxygen sensor is arranged at 0.5 ~ 0.6m place, underwater, each region, and output voltage signal;

2) measured node that a region is corresponding is sent after voltage signal being delivered to modulate circuit process to;

3) measured node perception each region soluble oxygen solubility send cluster head to by after solubility data processing;

4) cluster head is sent to base station to after the data fusion of each measured node, and base station sends PLC to by RS-485 communication;

5) PLC starts according to measurement data or closes the aerator of corresponding region.

Described step 3) in, measured node is per minute sends a secondary data to cluster head, interior perception N secondary data per minute, and wherein N is positive integer; In order to reduce measuring system random errors affect, measured node sends to cluster head after the data of institute's perception being averaged and deletes gross error by Xiao Weinie criterion, ensure that the stability that dissolved oxygen content is measured.。

Described step 4) in, base station is powered by fixed power source; And base station specifies each measured node to serve as cluster head in turn; After base station receives the measurement data that each region cluster head sends, by the serial-port communication of RS-485 order wire and PLC.

Described step 5) in, in order to avoid aerator frequent starting and closedown cause mechanical failure, aerator has startup threshold value and cuts out threshold value; PLC monitors each region water body dissolved oxygen content according to measurement data, and oriented control each region aerator starts or cuts out; When dissolved oxygen content is lower than startup threshold value, start aerator; When Dissolved Oxygen in Water content is greater than closedown threshold value, then close aerator.

The beneficial effects of the utility model are, solve the defect existed in background technology, by the process of Xiao Weinie criterion to dissolved oxygen content measured value, delete gross error, ensure that accuracy and the stability of measurement; With open simultaneously or close compared with multiple stage aerator extensive style oxygenation way, improve oxygenation efficiency, decrease the energizing power large load operation time, make electric load more balanced; The oxygenation of intelligent positioning region makes culturing pool water body dissolved oxygen content more balanced, stable, improves aquatic products growing environment.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is structure principle chart of the present utility model;

Fig. 2 is the utility model measured node structure chart;

Fig. 3 is the utility model impeller automatic aerator mode switching control figure;

In figure: 1, measured node; 2, cluster head; 3, base station; 4, S7-224PLC; 5, impeller automatic aerator.

Embodiment

With preferred embodiment, the utility model is described in further detail by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.

As shown in Figure 1, system hardware structure comprises: measured node 1, cluster head 2, base station 3, S7-224PLC4 and impeller automatic aerator 5.

In Fig. 1, culturing pool is divided into some regions, each region forms one bunch by several measured node (employing lithium battery power supply), wireless measurement network adopts low power consumption adaptive to hive off layered protocol, each node is specified to serve as cluster head in turn by base station (fixed power source is powered), each node energy is consumed balanced, extend the effective life cycle of radio sensing network.After the complete data of node measurement, time-sharing send is to cluster head, and cluster head sends to base station after merging each node image data.

As shown in Figure 2, measured node is by lithium battery power supply, and dissolved oxygen sensor (YDC-100) output voltage (0 ~ 25V) converts the input voltage of (0 ~ 3.3V) applicable node A/D conversion to through modulate circuit.

Slowly, node is per minute sends a secondary data to cluster head, interior perception 6 secondary data per minute in dissolved oxygen content change, and in order to ensure the accurate of measurement, node deletes gross error by Xiao Weinie criterion, sends to cluster head after averaging.

As 6 times, perception data is respectively X1=5.32mg/L; X2=5.22mg/L; X3=5.30mg/L; X4=5.38mg/L; X5=4.68mg/L; X6=5.22mg/L.

Then try to achieve average standard deviation=0.256mg/L.As n=6, table look-up and obtain Xiao Weinie coefficient z=1.73, then deviation range v=σ Ζ=0.443mg/L.

$|X_5-\stackrel{\‾}{X}|=0.51mg/L>0.443mg/L,$ Then delete, again try to achieve: average $\stackrel{\‾}{X}=5.29mg/L,$ Standard deviation=0.069mg/L.As n=5, Xiao Weinie coefficient z=1.65, then deviation range v=σ Ζ=0.114mg/L.Residual error absolute value is all less than 0.114mg/L, then think that now measured value is 5.29mg/L.

Base station adopts fixed power source to power, when after the measurement data receiving the cluster head transmission of each region, by the serial-port communication of RS-485 order wire and Siemens S7-224PLC, after PLC obtains the measurement data of each region soluble oxygen content, start according to impeller automatic aerator switch control rule rule shown in Fig. 3 and close aerator.When dissolved oxygen content is lower than 4.0mg/L, start aerator, if the consumption of culturing pool dissolved oxygen content is large, natural world supplements few (as little in wind, overcast and rainy etc.) Dissolved Oxygen in Water content, dissolved oxygen content is all the time lower than 6.0mg/L, then impeller automatic aerator remains starting state, if measurement obtains Dissolved Oxygen in Water content be greater than 6.0mg/L, then closes aerator.Ensure that Dissolved Oxygen in Water content all-the-time stable is in the scope of the 4.0mg/L to 6.0mg/L of applicable fish growth.PLC monitors each region water body dissolved oxygen content according to measurement data, the work of oriented control each region aerator.

The just embodiment of the present utility model described in above specification, various illustrating is not construed as limiting flesh and blood of the present utility model, person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence and the scope of utility model.

Claims (2)

1. an aquaculture intelligent positioning oxygen-increasing device, is characterized in that: comprise dissolved oxygen sensor, wireless communication node, aerator and PLC; Described dissolved oxygen sensor is arranged at 0.5 ~ 0.6m place, underwater, culturing pool each region; The output of described dissolved oxygen sensor connects the input of modulate circuit; The output of described modulate circuit connects wireless communication node; Described wireless communication node is connected with base station by radio connection; Described base station connects PLC by RS-485 order wire; Described PLC controls startup or the closedown of aerator.

2. aquaculture intelligent positioning oxygen-increasing device as claimed in claim 1, is characterized in that: described wireless communication node adopts low power consumption adaptive to hive off layered protocol, comprises microprocessor, A/D interface and RF radio-frequency antenna; The output of described modulate circuit is connected with A/D interface; Wireless communication node is connected with base station by RF radio-frequency antenna; Described modulate circuit and wireless communication node are by lithium battery power supply.