CN2563574Y - Blade temperature differential instrument - Google Patents
Blade temperature differential instrument Download PDFInfo
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- CN2563574Y CN2563574Y CN 02240171 CN02240171U CN2563574Y CN 2563574 Y CN2563574 Y CN 2563574Y CN 02240171 CN02240171 CN 02240171 CN 02240171 U CN02240171 U CN 02240171U CN 2563574 Y CN2563574 Y CN 2563574Y
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- temperature
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- temperature sensor
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Abstract
The utility model belongs to a blade temperature differential instrument of three-point type, single point type or between blade temperature and air temperature and is suitable for synchronized measurement of blade temperature of plants indoors and outdoors, environmental temperature and the differential value between the blade temperature and environmental temperature. The instrument integrates a semiconductor temperature sensor, a semiconductor temperature transducer, a ventilated blade chamber frame and a singlechip control system through lines; through the functional development of the control system, the real-time collection and operation of the blade temperature and air temperature are achieved; menus are divided to different levels to display various collected temperature indexes and the differential values (blade temperature )between the average value of three-point type blade temperature and air temperature on a front panel of the control system. Through three operational keys, parameters are input; the tested data is stored and achieves data communications with a computer. The data for communication automatically operates the office software for handling the data and graphics, and further the blade moisture stresslead state and the variety drought resisting judgment corresponding to the tested parameters can be analyzed through logical judgment. The instrument has the advantages of minitype (the whole instrument weighs 0.8 kg ), rapidness (a set of measurement can be completed in 5 seconds), high precision (field measuring resolution is +-0.2 DEG C), automatic data processing, simple and feasible operation, etc.
Description
Technical field
The utility model belongs to the fast measuring instrument.
Background technology
Under the normal growth condition, plant leaf blade is by transpiration, the moisture loss that root system is absorbed from soil in atmosphere, thereby keep normal body temperature.When soil moisture serious deficiency or high temperature and drought, the transpiration of blade is suppressed, and makes the leaf temperature rise.Therefore, by measuring the difference between leaf temperature and the environment temperature, the drought-resistant ability that can understand the soil moisture stress degree indirectly and estimate plant or kind.
The mensuration of the plant leaf blade temperature difference does not have special instrument and product development both at home and abroad.At present, use infrared thermometer to measure leaf temperature usually, measure environment temperature, calculate the leafing temperature difference by leaf temperature and environment temperature with common mercury thermometer or semiconductor thermometer etc.The subject matter that original measuring method exists is:
Principle of instrument used when 1, measuring with environment temperature owing to blade is different, and measure the process environment condition and be difficult to guarantee unanimity relatively, the leaf temperature approach that calculates, human factor causes error big.
2, because the temperature measuring of leaf benign environment is two kinds of different instruments, can not demonstrate two kinds of temperature values at same display, direct mensuration temperature gap that more can not be real-time.
3, because leaf benign environment temperature is to measure respectively, do not have special TT﹠C system, synchronous acquisition, the storage that can not carry out mass data reach and the computing machine communication, and reality uses operation inconvenient, and finding speed is slow, and efficient is low.
Summary of the invention
The utility model is about a kind of mensuration plant leaf temperature, environment temperature and the invention of the The real time measure of difference (the blade temperature difference) between the two.This utility model precision height (0.2 ℃), speed fast (5S/ time), standardization are measured, and error is little.Can realize that leaf temperature and environment temperature show and the direct-reading of the leaf temperature difference with screen, and can carry out data automatic collecting, storage and computing machine communication and further data and graphics process and result's logic determines.Easy to operation in actual use, instrument is a small-size multifunction.Be widely used in leaf temperature approach mensuration and the water regime and the breediness differentiation of each kind of plant.The purpose of this utility model is achieved in that
4 PN junction semiconductor temperature sensors and transmitter device thereof are pressed from both sides in formula leaf chamber and the handle thereof at one.Wherein on the equidistant upper springs adhesive tape that is fixed on the inferior lobe chamber of 3 temperature sensors.During mensuration, 3 induction positions contact with blade; Other 1 temperature sensor is positioned at the bottom of inferior lobe chamber, and differ 5cm between 3 leaf temperature sensors, the diameter of inductive probe is 0.1-0.5cm, resolution is 0.1 ℃, do not contact during mensuration, respond to the residing environment of tested blade (air) temperature with blade, and by being connected with TT﹠C system, realize leaf temperature and the same principle of environment temperature, measure synchronously and show, and can realize the real-time direct-reading of the leaf temperature difference by the formula operation of " the leaf temperature difference=environment temperature-Ye Wen " with screen.
This blade difference instrument is the real-time monitoring of carrying out the Ye Wen and the environment temperature leaf temperature difference with special TT﹠C system, special-purpose TT﹠C system is mainly solidified specific program storer and corresponding liquid crystal display, keyboard and communicating circuit by multi-way switch, analog to digital converter, central processor CPU, expansion RAM data-carrier store and EPROM, has formed the one-chip computer developing system that is exclusively used in the blade temp different measuring.Thereby realize the measurement operation under the cursor guiding, make quick collection, storage, analysis and the computer interconnection communication of standardization of blade temp different measuring and mass data, and communication data is used for computer data and pattern analysis and logic determines.
The temperature sensor that this blade difference instrument is selected for use is the PN junction temperature sensor, have precision height (0.2 ℃), reaction velocity fast (＜5S), linear and repeatability is than other sensor (as thermistor) height.In circuit design, adopt optimal design, have that antijamming capability is strong, a circuit reduction, little, the high-precision analog to digital conversion of volume (12 A/D), thereby realize that precision height, reaction are fast, small portable, blade temp different measuring simple to operate.Advantage of the present utility model and good effect:
1, Ye Wen and environment temperature adopt same type of sensor to measure synchronously, and the blade temperature approach is directly calculated, and show with screen;
2, fast automatic 4 circuit-switched data collections, calculating and demonstration, and can carry out data communication and aftertreatment with computing machine;
3, temperature measurement accuracy height (± 0.2 ℃), reaction fast (＜5S=, instrument small portable (0.5kg), easy and simple to handle.
Description of drawings
Fig. 1. blade difference instrument one-piece construction synoptic diagram;
Fig. 2. leaf cell structure synoptic diagram;
Fig. 3. the TT﹠C system structural drawing;
Fig. 4 .PN junction temperature sensor and transmitter circuit figure;
Fig. 5. the TT﹠C system circuit diagram;
Fig. 6. the program principle figure of TT﹠C system;
Fig. 7. the blade difference instrument is measured instance graph.
Fig. 1 is the one-piece construction synoptic diagram of this instrument.(1) is the leaf chamber that temperature sensor is housed among the figure, connects with TT﹠C system (3) by the cable among the figure (2).
Fig. 2 is a leaf cell structure synoptic diagram.There is framework (4,5) up and down the leaf chamber, forms folder formula leaf chamber by spring clamp (6), and the leaf chamber is for there being air hole (7) around the uncovered of the no end.3 leaf temperature sensors (8) are erect on top at the underframe of leaf chamber, bottom suspention 1 air temperature sensor (9), and 4 sensors are fixed on the narrow shape rubber strip (10).Rubber strip (10) is fixed on the frame wall of both sides, and the related circuit of each sensor is in a transmission circuit plate (11) places leaf chamber handle (12).
Fig. 3 is the TT﹠C system outside drawing.Place, the upper right corner of front panel is the LCD (13) of 2 * 16 characters, and the left side of front panel is the difference in functionality key of power switch (14) and ENT (carriage return) (15), ESC (withdrawing from) (16), DEL (deletion) (17).
Fig. 4 is PN junction temperature sensor and transmitter circuit figure.PN junction semiconductor temperature sensor (18) adds steady current (19), utilizes the PN junction forward voltage drop to vary with temperature rule by differential amplifier circuit (20), realizes the linear relationship of temperature and output voltage.
Fig. 5 is the TT﹠C system circuit diagram.The analog quantity that A/D analog to digital converter ADTLC2543 (21) measures sensor among the figure is converted to digital quantity, and read people's single-chip microcomputer 89C52 (22), single-chip microcomputer is with the data data-carrier store 284 (23) of passing on a skill of craft to others again then, be stored in 2864 data and can on the LCD of LCD2 * 16 characters, show (24), and carry out data transmission by the RS232 communication port of MAX232 (25) and computing machine.
Fig. 6 is the flow chart of TT﹠C system.Single-chip microcomputer 89c52 master routine (26).The keypad input enters corresponding branch program, gathers branch program (27), can realize the collection and the storage of data.Communication branch program (28) can realize the exchanges data and the processing of analyzer and computing machine, and deletion branch program (29) can realize emptying storer and the single data of deletion.
Embodiment
Fig. 7 is that the leaf temperature instrument is measured instance graph.Diagram is used this instrument can determine corn agricultural university in seedling stage 103 accurately, and the leaf temperature difference of the new combination of single 32 3 high yields in agricultural university 1088 and Central Plains is higher than male parent and maternal self-mating system significantly.This shows that the leaf temperature difference has tangible hybrid vigour, and this leaf temperature difference advantage is relevant with transpiration with the moisture of blade.
Measure with CAU blade difference instrument the male parent of three kinds of corn is measured in the maternal and hybridization, by analysis as can be seen, the cenospecies of three kinds all has leaf temperature difference advantage than its male parent female parent, and the cenospecies leaf temperature difference is apparently higher than the parent.
Claims (4)
1. blade difference instrument, the leaf chamber (1) that it is characterized in that being equipped with temperature sensor is formed by connecting by cable (2) and TT﹠C system (3); Leaf chamber (1) is by upper frame (4) and underframe (5), form folder formula leaf chamber by spring clamp (6), leaf chamber (1) is for there being air hole (7) leaf chamber around the uncovered of the no end, in underframe, there is rubber strip (10) to be fixed on the frame wall of both sides, on rubber strip, erect three leaf temperature sensors (8), suspend an air temperature sensor (9) below in midair, the related circuit of four sensors is on a bar shaped transmission circuit plate, be contained in leaf chamber handle (12), at the leaf chamber handle end socket is arranged, be connected with TT﹠C system with cable (2) by connector; The place, the upper right corner of TT﹠C system (3) front panel is the LCD (13) of 2 * 16 characters, and the left side of front panel is the difference in functionality key that power switch (14) and ENT carriage return (15), ESC withdraw from (16), DEL deletion (17).
2. by the described blade difference instrument of claim 1, the circuit theory that it is characterized in that temperature sensor and transmitter is that PN junction semiconductor temperature sensor (18) adds steady current (19), utilize the PN junction forward voltage drop to vary with temperature rule, realize the linear relationship of temperature and output voltage by differential amplifier circuit (20).
3. by the described blade difference instrument of claim 1, the circuit theory that it is characterized in that TT﹠C system is that the analog quantity that A/D modulus energy parallel operation ADTLC2543 (21) measures sensor is converted to digital quantity, and read people's single-chip microcomputer 89C52 (22), single-chip microcomputer is with the data data-carrier store 2864 (23) of passing on a skill of craft to others again then, be stored in 2864 data and can on the LCD of LCD2 * 16 characters, show (24), and carry out data transmission by the RS232 communication port of MAX232 (25) and computing machine.
4. by the described blade difference instrument of claim 1, it is characterized in that differing between leaf temperature sensor and the air temperature sensor is 5cm highly, and the diameter of temperature sensor and environment temperature sensor inductive probe is 0.1-0.5cm, and resolution is 0.1 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02240171 CN2563574Y (en) | 2002-07-16 | 2002-07-16 | Blade temperature differential instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02240171 CN2563574Y (en) | 2002-07-16 | 2002-07-16 | Blade temperature differential instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2563574Y true CN2563574Y (en) | 2003-07-30 |
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ID=33713365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02240171 Expired - Fee Related CN2563574Y (en) | 2002-07-16 | 2002-07-16 | Blade temperature differential instrument |
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| CN (1) | CN2563574Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100573146C (en) * | 2003-04-11 | 2009-12-23 | 中国科学院地理科学与资源研究所 | A kind of determining crops water forcing index device and assay method thereof |
| CN102338760A (en) * | 2011-06-07 | 2012-02-01 | 贵州大学 | Method for measuring drought resistance indexes of cured tobaccos |
| CN102564634A (en) * | 2012-03-02 | 2012-07-11 | 中国计量学院 | Measuring instrument for temperature of surface of plant leaf |
| CN103125371A (en) * | 2013-03-13 | 2013-06-05 | 北京农业信息技术研究中心 | Method for carrying out field rapid assistant screening on crop drought-resisting mutants |
| CN103270871A (en) * | 2013-05-16 | 2013-09-04 | 中国农业科学院兰州畜牧与兽药研究所 | Method for fast detecting drought resistance of alfalfa varieties and sorting drought-resistant alfalfa varieties |
| CN105277589A (en) * | 2015-09-14 | 2016-01-27 | 河海大学 | Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method |
-
2002
- 2002-07-16 CN CN 02240171 patent/CN2563574Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100573146C (en) * | 2003-04-11 | 2009-12-23 | 中国科学院地理科学与资源研究所 | A kind of determining crops water forcing index device and assay method thereof |
| CN102338760A (en) * | 2011-06-07 | 2012-02-01 | 贵州大学 | Method for measuring drought resistance indexes of cured tobaccos |
| CN102564634A (en) * | 2012-03-02 | 2012-07-11 | 中国计量学院 | Measuring instrument for temperature of surface of plant leaf |
| CN102564634B (en) * | 2012-03-02 | 2014-09-03 | 中国计量学院 | Measuring instrument for temperature of surface of plant leaf |
| CN103125371A (en) * | 2013-03-13 | 2013-06-05 | 北京农业信息技术研究中心 | Method for carrying out field rapid assistant screening on crop drought-resisting mutants |
| CN103125371B (en) * | 2013-03-13 | 2014-09-10 | 北京农业信息技术研究中心 | Method for carrying out field rapid assistant screening on crop drought-resisting mutants |
| CN103270871A (en) * | 2013-05-16 | 2013-09-04 | 中国农业科学院兰州畜牧与兽药研究所 | Method for fast detecting drought resistance of alfalfa varieties and sorting drought-resistant alfalfa varieties |
| CN105277589A (en) * | 2015-09-14 | 2016-01-27 | 河海大学 | Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |