CN2828813Y - Soilless culture nutrient solution investigating instrument - Google Patents
Soilless culture nutrient solution investigating instrument Download PDFInfo
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- CN2828813Y CN2828813Y CN 200520073223 CN200520073223U CN2828813Y CN 2828813 Y CN2828813 Y CN 2828813Y CN 200520073223 CN200520073223 CN 200520073223 CN 200520073223 U CN200520073223 U CN 200520073223U CN 2828813 Y CN2828813 Y CN 2828813Y
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- circuit
- nutrient solution
- microprocessor
- output terminal
- soilless culture
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Abstract
The utility model discloses a nutrient solution measuring instrument for soilless cultivation, which is composed of a sensor probe, a reference regulator comparison circuit, a capacitance integrating measuring circuit, an IC microprocessor, an oscillating circuit and an LED display. The connecting mouth of the sensor probe is respectively connected with the input terminal of the reference regulator comparison circuit and the input terminal of the capacitance integrating measuring circuit. The connection is through the output terminal of the reference regulator comparison circuit and the input terminals A of the IC microprocessor and the oscillating circuit. Then the output terminal of the capacitance integrating measuring circuit is connected with the input terminals B of the IC microprocessor and the oscillating circuit. The output terminals of the IC microprocessor and the oscillating circuit are connected with the LED display. The nutrient solution measuring instrument for soilless cultivation of the utility model measures the concentration of the nutrient solution by measuring the value of the conductivity of the nutrient solution. The nutrient solution measuring instrument for soilless cultivation can realize the real time observation of the nutrient solution and the guiding of workers to cultivate scientifically.
Description
Technical field
The utility model relates to a kind of soilless culture nutrient fluid tester.
Background technology
Soilless culture is an emerge science technology that grows up on the basis of mineral nutrition of plant research.It uses the water culture cultivated plant of chemical solution (nutrient solution) fully without natural soil.Different plant needs different nutrient solution concentrations help control, and rationally, appropriately whether it be directly connected to the upgrowth situation of plant.At present, in real work, can only lean on other instrument to measure nutrient solution concentration, the method more complicated, it is single that reading shows, calculates cumbersomely, and randomness is bigger, and operation is inconvenience extremely; Different operators is easy to occur some different numerical value, problems such as intuitive difference.
The utility model content
Technical problem to be solved in the utility model is to remedy the blank that prior art exists,-----soilless culture nutrient fluid tester that the nutrition (nutritive solution) that provides a kind of scene that plant growth in the hydroponic culture method is absorbed is carried out the real-time system monitoring.
The utility model soilless culture nutrient fluid tester is made of sensor probe, reference adjustor comparator circuit, capacitance integral metering circuit, IC microprocessor and oscillatory circuit and light-emitting diode display.The connector of sensor probe is connected with the input end of reference adjustor comparator circuit and the input end of capacitance integral metering circuit respectively, is connected with the input end A of IC microprocessor and oscillatory circuit through the output terminal of reference adjustor comparator circuit; The output terminal of capacitance integral metering circuit links to each other with the input end B of IC microprocessor and oscillatory circuit again; The output terminal of IC microprocessor and oscillatory circuit is connected with light-emitting diode display.
The utility model soilless culture nutrient fluid tester is by measuring the nutrient solution conductivity value, thereby measures the concentration of nutrient solution, can the real-time monitored nutrient solution, and guiding work person section scholarship and self-cultivation is planted.
Description of drawings
Fig. 1, be the utility model soilless culture nutrient fluid tester structured flowchart;
Fig. 2, be the utility model soilless culture nutrient fluid tester circuit diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment: as illustrated in fig. 1 and 2, the soilless culture nutrient fluid tester is made of sensor probe, reference adjustor comparator circuit, capacitance integral metering circuit, IC microprocessor and oscillatory circuit and light-emitting diode display; The connector of sensor probe is connected with the input end of reference adjustor comparator circuit and the input end of capacitance integral metering circuit respectively, is connected with the input end A of IC microprocessor and oscillatory circuit through the output terminal of reference adjustor comparator circuit; The output terminal of capacitance integral metering circuit links to each other with the input end B of IC microprocessor and oscillatory circuit again; The output terminal of IC microprocessor and oscillatory circuit is connected with light-emitting diode display.The IC microprocessor is selected the MCU of PIC16CXX for use, because of the direct driving LED of its I/O mouth energy, has then saved power device, makes hardware circuit more concise.Select the graphite probe for use, interior device plays the thermal-sensitive electric resistance device of full-automatic temperature compensation.Adopt 4 * 4LED diode oriental matrix display.
Principle of work: in the solution of variable concentrations, the conductivity value difference of solution.It is can induce because electric current variation between the different electrodes that cause of concentration by electrochemical sensor, compare delivering to microprocessor after this measure of the change amplification, and the corresponding concentration of corresponding instrument institute that can draw solution as calculated to trigger its LED diode pilot lamp bright, the conductivity value actual value of this solution is reflected.Instrument is always ceaselessly sending the pulse signal that detects electric current at ordinary times, if instrument leaves in the air (" dormancy " state) in or puts for a long time in measured solution, and detect less than the current signal (because of putting current balance type no change in measured solution for a long time) that changes, then do not show.When in a single day the sensor of instrument is put in measured solution, produce that electric current changes this moment and moment activation of microprocessor measure comparison, it is bright to trigger its LED diode pilot lamp accordingly, shows the concentration value of its solution.Measure and finish back (bright 16 times of pilot lamp), instrument enters " dormancy " state.
The utility model embodiment soilless culture nutrient fluid tester technical parameter index:
1) environment for use temperature: 0 ℃～40 ℃
2) two kinds of versions of range ability: 4CF～44CF and 4CF～52CF (CF, EC, PPM three unit scalings exchange).
3) display resolution: 1CF
4) measuring error: ± 1CF
5) full-automatic temperature compensation (ATC)
6) self-checking function
7) range overflows indication
8) display mode: LED lamp flicker indication
9) the full water proof type of product
Instrument outward appearance scale is demarcated reading
| RS-100 | RS-100A | ||||||
| PPM1 | PPM2 | CF | EC | PPM1 | PPM2 | CF | EC |
| 280 | 200 | 4 | 0.4 | 280 | 200 | 4 | 0.4 |
| 420 | 300 | 6 | 0.6 | 420 | 300 | 6 | 0.6 |
| 560 | 400 | 8 | 0.8 | 560 | 400 | 8 | 0.8 |
| 700 | 500 | 10 | 1.0 | 700 | 500 | 10 | 1.0 |
| 840 | 600 | 12 | 1.2 | 840 | 600 | 12 | 1.2 |
| 980 | 700 | 14 | 1.4 | 980 | 700 | 14 | 1.4 |
| 1120 | 800 | 16 | 1.6 | 1120 | 800 | 16 | 1.6 |
| 1260 | 900 | 18 | 1.8 | 1400 | 1000 | 20 | 2.0 |
| 1400 | 1000 | 20 | 2.0 | 1680 | 1200 | 24 | 2.4 |
| 1540 | 1100 | 22 | 2.2 | 1960 | 1400 | 28 | 2.8 |
| 1680 | 1200 | 24 | 2.4 | 2240 | 1600 | 32 | 3.2 |
| 1960 | 1400 | 28 | 2.8 | 2520 | 1800 | 36 | 3.6 |
| 2240 | 1600 | 32 | 3.3 | 2800 | 2000 | 40 | 4.0 |
| 2520 | 1800 | 36 | 3.6 | 3080 | 2200 | 44 | 4.4 |
| 2820 | 2000 | 40 | 4.0 | 3360 | 2400 | 48 | 4.8 |
| 3080 | 2200 | 44 | 4.4 | 3640 | 2600 | 52 | 5.2 |
Measuring unit commonly used is as follows:
1. conductivity " EC "
2. electricity is led constant " CF "
Conductivity value is the standard K CL solution of 1EC, and the PPM value is different under different temperatures.
Attention: 20 when spending, and the electrical conductivity of solution of 700PPM is 1EC;
These are absolute values of science, proportional each other relation:
10CF=1EC=700PPM; Region, North America: 10CF=1EC=500PPM; Conductivity changes along with variation of temperature, and approximately per 1 degree changes 2%, so, must compensate conductivity measurements according to environment temperature.Because plant only to the concentration-response of nutrient solution, just to the conductivity value reaction, so when obtain solution, if only know the PPM/ temperature requirement, need measure so that revise by conductivity meter, obtains correct conductivity.
Claims (1)
1, a kind of soilless culture nutrient fluid tester is made of sensor probe, reference adjustor comparator circuit, capacitance integral metering circuit, IC microprocessor and oscillatory circuit and light-emitting diode display; It is characterized in that: the connector of sensor probe is connected with the input end of reference adjustor comparator circuit and the input end of capacitance integral metering circuit respectively, is connected with the input end A of IC microprocessor and oscillatory circuit through the output terminal of reference adjustor comparator circuit; The output terminal of capacitance integral metering circuit links to each other with the input end B of IC microprocessor and oscillatory circuit again; The output terminal of IC microprocessor and oscillatory circuit is connected with light-emitting diode display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520073223 CN2828813Y (en) | 2005-07-01 | 2005-07-01 | Soilless culture nutrient solution investigating instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520073223 CN2828813Y (en) | 2005-07-01 | 2005-07-01 | Soilless culture nutrient solution investigating instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2828813Y true CN2828813Y (en) | 2006-10-18 |
Family
ID=37080369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520073223 Expired - Fee Related CN2828813Y (en) | 2005-07-01 | 2005-07-01 | Soilless culture nutrient solution investigating instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2828813Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842398A (en) * | 2016-03-29 | 2016-08-10 | 福建农林大学 | Analysis device and method for plant growth fertilizer consumption |
-
2005
- 2005-07-01 CN CN 200520073223 patent/CN2828813Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842398A (en) * | 2016-03-29 | 2016-08-10 | 福建农林大学 | Analysis device and method for plant growth fertilizer consumption |
| CN105842398B (en) * | 2016-03-29 | 2018-01-12 | 福建农林大学 | A kind of plant growth fertilizer Consumption Analysis device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061018 Termination date: 20120701 |