CN204008535U - The test macro of the critical freeze injury temperature of one Plants - Google Patents
The test macro of the critical freeze injury temperature of one Plants Download PDFInfo
- Publication number
- CN204008535U CN204008535U CN201420465469.8U CN201420465469U CN204008535U CN 204008535 U CN204008535 U CN 204008535U CN 201420465469 U CN201420465469 U CN 201420465469U CN 204008535 U CN204008535 U CN 204008535U
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- working electrode
- plants
- freeze injury
- temperature
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Abstract
The test macro that the utility model discloses the critical freeze injury temperature of a Plants, comprising: computing machine, working electrode, speed-regulating fan, humidifier that cryogenic thermostat incubator, high precision LCR tester, humiture registering instrument, data analysis are used; Wherein, high precision LCR tester is imposed on and is treated the ac-excited voltage signal of measuring plants by working electrode, and the electric signal of measuring plants is treated in working electrode collection; Humiture in humiture registering instrument monitoring cryogenic thermostat incubator changes; Change measures ambient humidity by humidifier, can change measurement environment wind speed by speed-regulating fan; By above system, can simulating plant stand the complex environment of low temperature stress.The utility model can accurately be measured plant frozen injury critical temperature, can be used in flow perturbation frost prevention control, for it provides important control parameter.
Description
Technical field
The utility model belongs to agrometeorological hazard to be measured and control field, is specifically related to the test macro of the critical freeze injury temperature of a Plants.
Background technology
The Spring frost that the low temperature in time in early spring produces can cause Famous High-quality Tea output significantly to reduce, and tea leaf quality declines, thereby causes the tremendous economic loss of Tea Industry.Recent domestic has been developed frost prevention equipment and the technology based on flow perturbation, and the patent No. is: the Jap.P. of JP2007000096, discloses the overhead frost prevention fan for the frost prevention of tea fruit garden; The patent No. is 200810124434.7 Chinese patent, discloses a kind of method for controlling fan system and device of preventing frost damage of plant; The patent No. is the United States Patent (USP) of US20110247263, has proposed to stop controlling based on the poor control of critical low temperature inversion and regurgitation Wen Yan, and these two kinds of control modes are all that critical temperature taking tea tree generation freeze injury is as necessary condition; Flow perturbation control it is essential critical this parameter of freeze injury temperature, but this parameter still can not provide by accurate quantitative analysis at present.So in frost prevention control, often adopt the critical freeze injury temperature of extensive, empirical estimation crop, this mode exists and increases the weight of frost damage, waste electric power and fuel.At present not measuring method and system simply and easily of the critical freeze injury temperature of plant, whether the shape after can only observing plant endure cold by human eye and the change of color, could differentiate plant by grower's experience and endure cold.But this kind of method can not be measured the critical freeze injury temperature of plant effectively and accurately.
Summary of the invention
The purpose of this utility model is to provide the test macro of the critical freeze injury temperature of a Plants, realizes effective Measurement accuracy of the critical freeze injury temperature of plant, for flow perturbation frost prevention control provides important control parameter.
In order to solve above technical matters, the concrete technical scheme that the utility model adopts is as follows:
The test macro of the critical freeze injury temperature of one Plants, is characterized in that comprising: computing machine (4), working electrode (5), speed-regulating fan (6), humidifier (7) that cryogenic thermostat incubator (1), high precision LCR tester (2), humiture registering instrument (3), data analysis are used;
Speed-regulating fan (6) is placed in cryogenic thermostat incubator (1) with humidifier (7); Working electrode (5) is connected with high precision LCR tester (2) by connecting test cable; Humiture registering instrument (3) is placed in cryostat incubator (1); The computing machine (4) that high precision LCR tester (2) is used with data analysis by RS232 serial ports is connected.
The fine needle that working electrode (5) is a kind of conduction for inserting the inside of plant leaf blade or stem, or is four end Kelvin test probes, for clamping plant leaf blade or stem.
test philosophy of the present utility model.in the time that plant is subject to low temperature stress, the variations such as can to occur that cell is can dehydration concentrated, chemical bond breaks icing that vegetable cell is inner, its biological membrane can become gel state from liquid crystal state; The measured plant capacitance signal of working electrode (5), its computing formula is as follows:
C=εS/d
ε in formula---specific inductive capacity,
The area of S---blade,
D---plant leaf blade upper and lower surface distance.
Ignore plant leaf blade in the variation that stands d after Freezing stress, from above formula, the change of inner cell can cause the variation of DIELECTRIC CONSTANT ε, and therefore the capacitance signal of plant can change.In the time that plant reaches critical freeze injury temperature, plant starts to stand Freezing stress, and capacitance signal there will be a peak value; When temperature continues to reduce, vegetable cell can be frozen, and its cell liquid freezes, and the DIELECTRIC CONSTANT ε of ice is much smaller than the specific inductive capacity of plant cell liquor, and the capacitance signal of plant can reduce, and the peak value of its capacitance signal there will be falling; When temperature continues to reduce, DIELECTRIC CONSTANT ε remains unchanged substantially, and the value of capacitance signal can fluctuate within the scope of one, but there will not be peak value.There is peak value temperature spot corresponding to when sudden change in capacitance signal, is the critical freeze injury temperature of plant.
the beneficial effect the utlity model has.The utility model, by measuring the electric signal of plant, is analyzed the change in electric feature of plant, thereby realizes the quick and precisely measurement of the critical freeze injury temperature of plant, for flow perturbation frost prevention control provides important control parameter.
Brief description of the drawings
Fig. 1 is the utility model system architecture schematic diagram;
The critical freeze injury temperature of tea tree sample under different wind friction velocities when Fig. 2 is air humidity 70% ~ 90%.
In figure: 1 cryogenic thermostat incubator, 2 high precision LCR testers, 3 humiture registering instruments, the computing machine that 4 data analyses are used, 5 working electrodes, 6 speed-regulating fans, 7 humidifiers.
Embodiment
Under by reference to the accompanying drawings, the technical solution of the utility model is described in further details.
The present embodiment plant is taking tea tree as example, and the critical freeze injury temperature of test tea leaf is as the critical freeze injury temperature of tea tree.
In this embodiment, be Fuding great Bai for examination tea tree breed.
System of the present utility model forms as shown in Figure 1, comprising: computing machine 4, working electrode 5, speed-regulating fan 6, humidifier 7 that cryogenic thermostat incubator 1, high precision LCR tester 2, humiture registering instrument 3, data analysis are used; Humiture registering instrument 3 is monitored the interior humiture of cryogenic thermostat incubator 1 and is changed; Measures ambient humidity can be changed by humidifier 7, measurement environment wind speed can be changed by speed-regulating fan 6; By above system, can simulate tea tree and stand the complex environment of low temperature stress; What working electrode 5 adopted is four end Kelvin test probes, for clamping tea leaf.
Concrete method of testing is as follows: the first step, tea tree sample is put into cryogenic thermostat incubator 1; Second step, uses cryogenic thermostat incubator 1, speed-regulating fan 6 and humidifier 7 simulating nature circle frost condition in cryogenic thermostat incubator 1, tea tree sample is endured cold and coerce, and humiture registering instrument 3 is monitored the interior humiture of cryogenic thermostat incubator 1 and changed; The 3rd step: working electrode 5 one end are clamped to tea leaf to be measured, and working electrode 5 other ends connect high precision LCR tester 2; Working electrode 5 collects the analog electrical signal of tea leaf, and converts digital signal to after transferring to high precision LCR tester 2, shows, Storage and Processing in data analysis in the computing machine 4 of using; The 4th step, occurs by comparative analysis tea leaf capacitance signal the temperature spot of peak response obtaining the critical freeze injury temperature of tea tree sample.
The critical freeze injury temperature of tea tree sample under the different wind friction velocities that it is 70% ~ 90% that Fig. 2 represents according to measured air humidity; When wind speed is 0m/, the critical freeze injury temperature of tea tree sample is-5.6 DEG C; When wind speed is 1.5m/s, the critical freeze injury temperature of tea tree sample is-4.9 DEG C; When wind speed is 2.5m/s, the critical freeze injury temperature of tea tree sample is-4.4 DEG C.
Claims (2)
1. the test macro of the critical freeze injury temperature of a Plants, is characterized in that comprising: computing machine (4), working electrode (5), speed-regulating fan (6), humidifier (7) that cryogenic thermostat incubator (1), high precision LCR tester (2), humiture registering instrument (3), data analysis are used;
Speed-regulating fan (6) is placed in cryogenic thermostat incubator (1) with humidifier (7); Working electrode (5) is connected with high precision LCR tester (2) by connecting test cable; Humiture registering instrument (3) is placed in cryostat incubator (1); The computing machine (4) that high precision LCR tester (2) is used with data analysis by RS232 serial ports is connected.
2. the test macro of the critical freeze injury temperature of a Plants according to claim 1, it is characterized in that the fine needle that working electrode (5) is a kind of conduction, for inserting the inside of plant leaf blade or stem, or be four end Kelvin test probes, for clamping plant leaf blade or stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420465469.8U CN204008535U (en) | 2014-08-18 | 2014-08-18 | The test macro of the critical freeze injury temperature of one Plants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420465469.8U CN204008535U (en) | 2014-08-18 | 2014-08-18 | The test macro of the critical freeze injury temperature of one Plants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204008535U true CN204008535U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420465469.8U Withdrawn - After Issue CN204008535U (en) | 2014-08-18 | 2014-08-18 | The test macro of the critical freeze injury temperature of one Plants |
Country Status (1)
| Country | Link |
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| CN (1) | CN204008535U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155346A (en) * | 2014-08-18 | 2014-11-19 | 江苏大学 | Method for testing critical freeze damage temperature of plant, and system thereof |
| CN108508288A (en) * | 2018-01-22 | 2018-09-07 | 中国农业大学 | Plant electric signal detection device and method |
-
2014
- 2014-08-18 CN CN201420465469.8U patent/CN204008535U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155346A (en) * | 2014-08-18 | 2014-11-19 | 江苏大学 | Method for testing critical freeze damage temperature of plant, and system thereof |
| CN104155346B (en) * | 2014-08-18 | 2017-09-01 | 江苏大学 | A kind of method of testing and system of the critical freeze injury temperature of plant |
| CN108508288A (en) * | 2018-01-22 | 2018-09-07 | 中国农业大学 | Plant electric signal detection device and method |
| CN108508288B (en) * | 2018-01-22 | 2020-01-17 | 中国农业大学 | Plant electric signal detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20170901 |