CN203191336U - Tree stem flow measuring instrument - Google Patents
Tree stem flow measuring instrument Download PDFInfo
- Publication number
- CN203191336U CN203191336U CN 201320132588 CN201320132588U CN203191336U CN 203191336 U CN203191336 U CN 203191336U CN 201320132588 CN201320132588 CN 201320132588 CN 201320132588 U CN201320132588 U CN 201320132588U CN 203191336 U CN203191336 U CN 203191336U
- Authority
- CN
- China
- Prior art keywords
- trees
- main control
- stemflow
- stem flow
- flowmeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to the field of plant transpiration quantity detection, and particularly discloses a tree stem flow measuring instrument. The tree stem flow measuring instrument comprises a multichannel stem flow sensor, an analog-to-digital conversion chip, a main control singlechip and a CMOS (Complementary Metal-Oxide-Semiconductor) singlechip, wherein the analog-to-digital conversion chip is electrically connected with the multichannel stem flow sensor; the main control singlechip is electrically connected with the analog-to-digital conversion chip; the main control singlechip and the CMOS singlechip are both electrically connected with a heating module; and the heating module is electrically connected with heating probes which are respectively arranged corresponding to the multichannel stem flow sensor. The tree stem flow measuring instrument disclosed by the utility model is low in power consumption and flexible and controllable in thermal pulse heating time, can obtain the tree transpiration quantity through direct measurement and greatly enhance the accuracy of measured data and has the advantages of small size, light self weight, portability, and the like.
Description
Technical field
The utility model relates to plant transpiration amount detection range, relates in particular to a kind of plant stem flow amount determining device.
Background technology
The measurement of stemflow amount now mainly is thermal technology, and thermal technology commonly used has three classes: thermal pulse, thermal diffusion and thermal compensation.Comparatively speaking, the thermal pulse method is fairly simple, and the instrument and meter demand power is low, and therefore this method is widely used.In recent years, the method for utilizing stem flow gauge to measure the plant transpiration amount is used more and more widely.Stem flow gauge, English name Sap Flow Gauge is the resin instrument again, is a kind of instrument of measuring stemflow speed and then calculating plant transpiration amount by the heating plant stem.Yet existing stemflow still needs further the stemflow amount to be converted to transpiration rate after taking into account the stemflow amount that some apparatus measures go out trees, and this has relatively high expectations to user's operation, and is not easy to operate; Also there is the high shortcoming of power consumption in addition, thereby causes actual field survey to be difficult for realizing.Moreover thermal pulse is fixed heat time heating time, can not cause measuring failure easily according to data thermal motion characteristic adaptively changing heat time heating time; The thermal pulse heating is uncontrollable in addition, and in a single day program is run and flown and will burn out trees; In addition, also exist the measurement data precision not enough, can not well instruct shortcoming such as irrigation demand.
The utility model content
The purpose of this utility model is, proposes a kind of trees stemflow flowmeter, and it is low in energy consumption, thermal pulse is flexible heat time heating time, and the stemflow amount that measures can be converted into transpiration rate, and is easy to operate, improves the degree of accuracy of measurement data greatly.
For achieving the above object, the utility model provides a kind of trees stemflow flowmeter, it comprises: multichannel stem flow sensor, the modulus conversion chip that electrically connects with stem flow sensor, the main control singlechip that electrically connects with modulus conversion chip, and CMOS single-chip microcomputer; Described main control singlechip and CMOS single-chip microcomputer all electrically connect with a heating module, are electrically connected with respectively the heated probe with the corresponding setting of multichannel stem flow sensor on this heating module.
In the utility model, described multichannel stem flow sensor comprises 8 road stem flow sensors, the corresponding heated probe of each road stem flow sensor; Upper and lower two sensor probes have been included in this each road stem flow sensor, the stem that these upper and lower two sensor probes are installed on the trees stem is on same straight line, and described heated probe is inserted in the trees stem between upper and lower two sensor probes corresponding with it.
Wherein, described modulus conversion chip can adopt the ADC chip, and it is the modulus conversion chip of AD7795 that this ADC chip can adopt model.
Further, can to adopt model be single-chip microcomputer or the arm single-chip microcomputer of PIC16F74 to described main control singlechip.
Moreover it is the single-chip microcomputer of AT89C2051 that described CMOS single-chip microcomputer adopts model.
In the utility model, described heating module is a thermal pulse heating plate, includes the double plug connector of 14PIN altogether of a connection main control singlechip on this thermal pulse heating plate; Also be provided with 8 wire jumper interfaces on this heating module, these 8 wire jumper interface one ends all are connected with plug connector by a field effect transistor, these 8 wire jumper interface other ends all electrically connect with the collector of two PNP audio power amplifying triodes, the base stage of this two PNP audio power amplifying triode electrically connects by two resistance and plug connector, and the emitter of this two PNP audio power amplifying triode all electrically connects with a 12V power supply.
Moreover described main control singlechip and CMOS single-chip microcomputer all electrically connect by a Sheffer stroke gate and thermal pulse heating plate, and this main control singlechip also electrically connects by a 74hc138 code translator and thermal pulse heating plate.
In addition, described main control singlechip also is electrically connected with real time clock circuit, memory module, ambient temperature measurement module and supply voltage measurement module.
Wherein, described this real time clock circuit can adopt the PCF8563 chip, and it is the digital temperature sensor of DS18B20 that the ambient temperature measurement module adopts model, and it is the operational amplifier of TLC27L4 that the supply voltage measurement module adopts model.
Trees stemflow flowmeter of the present utility model, it can be converted into transpiration rate with the stemflow amount that measures, and is easy to operate, and what obtain directly is the tree transpiration amount; Simultaneously, it greatly reduces power consumption, is beneficial to actual field test and realizes; Moreover its thermal pulse is flexible heat time heating time, can be according to trees thermal motion characteristic adaptively changing heat time heating time, and the thermal pulse heating is controlled, when program fleet hard closing heating; In addition, owing to the employing of ADC chip, improve the degree of accuracy of measurement data greatly, can be good at instructing the actual irrigation demand; In addition owing to adopted suitable electron device, also have volume little, from heavy and light, advantage such as be convenient for carrying.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the principle schematic of a kind of specific embodiment of trees stemflow flowmeter of the present utility model;
Fig. 2 is the circuit theory synoptic diagram of a kind of specific embodiment of heating module in the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model provides a kind of trees stemflow flowmeter, it comprises: multichannel stem flow sensor 10, the modulus conversion chip 20 that electrically connects with stem flow sensor 10, the main control singlechip 30 that electrically connects with modulus conversion chip 20, and complementary metal oxide semiconductor (CMOS) (CMOS:Complementary Metal Oxide Semiconductor) single-chip microcomputer 40; Described main control singlechip 30 and CMOS single-chip microcomputer 40 all with a heating module 50 electric connections, be electrically connected with respectively the heated probe (not shown) with the 10 corresponding settings of multichannel stem flow sensor on this heating module 50.Trees stemflow flowmeter of the present utility model, it adopts suitable electron device, not only volume little, from heavy and light, be convenient for carrying, and by 30 Collaborative Control heat time heating times of CMOS single-chip microcomputer 40 and main control singlechip, thermal pulse is flexible heat time heating time, can be according to trees thermal motion characteristic adaptively changing heat time heating time, hard closing heating when program fleet makes that adding heat is guaranteed; Especially, it can be converted into transpiration rate with the stemflow amount that measures, and it is comparatively convenient to operate.
Wherein, described multichannel stem flow sensor 10 comprises 8 road stem flow sensors, each road stem flow sensor 10 corresponding heated probe.The corresponding 8 drive test amount passages that form of this 8 road stem flow sensor can be measured 8 test points, upper and lower two sensor probes (not shown) have been included in each road stem flow sensor 10, the stem that these upper and lower two sensor probes are installed on trees stem 1 is on same straight line, and described heated probe is inserted in the trees stem 1 between upper and lower two sensor probes corresponding with it.In concrete the application, described lower sensor probe is as benchmark, stemflow speed in the temperature difference reaction trunk between upper and lower two sensor probes, main control singlechip 30 further convert by experimental formula and draw stemflow speed by the temperature difference between upper and lower two sensor probes.
In the utility model, described modulus conversion chip 20 can adopt the ADC chip, and it is the modulus conversion chip of AD7795 that this ADC chip can adopt model.Described AD7795 is 16 bit resolutions, the true difference modulus conversion chip that ADI company produces, it has analog output terminal low in energy consumption and complete, having overcome like product is that low noise is sacrificed low-power consumption, perhaps sacrifice low noise limitation for low-power consumption, low noise and low-power consumption can be provided simultaneously, and improved the degree of accuracy of measurement data greatly, can be good at instructing the actual irrigation demand.
The utility model has been studied the heat propagation characteristic of the different growth phases of Different Crop, proposed to detect and signal processing method based on the crop transpiration rate thermal pulse of differential amplification principle, namely adopt the CMOS single-chip microcomputer 40 of low-power consumption to carry out the rough handling of data, the method of averaging according to the rejecting abnormalities data, reduce noise signal to the influence of measuring-signal, cooperate corresponding hardware circuit to finish filtering, amplification, feedback and mould/number conversion work to measuring-signal, thereby reduced requirement and the workload of main control singlechip 30.As a kind of preferred embodiment of the present utility model, it is the single-chip microcomputer of PIC16F74 that described main control singlechip 30 can adopt model, and it is the single-chip microcomputer of AT89C2051 that CMOS single-chip microcomputer 40 can adopt model.The utility model adopts the PIC16F74 single-chip microcomputer as kernel processor chip, greatly reduces the power consumption of instrument, is beneficial to actual field test and realizes.Moreover the utility model is also by AT89C2051 single-chip microcomputer and PIC16F74 single-chip microcomputer Collaborative Control heat time heating time, when the program fleet hard closing is heated.As another kind of selectivity embodiment of the present utility model, described main control singlechip 30 can also adopt the arm single-chip microcomputer, cooperates the AD chip to finish collection and the work for the treatment of of data.
Concrete, as shown in Figure 2, the heating module 50 in the utility model can be a thermal pulse heating plate, includes double plug connector (Header7X2) P5 of 14PIN altogether of a connection main control singlechip 30 on this thermal pulse heating plate.Also be provided with 8 wire jumper interface JP1-JP8 on this heating module 50, these 8 wire jumper interface JP1-JP8 one ends all are connected with plug connector P5 by a field effect transistor IRFP250, these 8 wire jumper interface JP1-JP8 other ends all electrically connect with the collector of two PNP audio power amplifying triode 2SA1943, the base stage of this two PNP audio power amplifying triode 2SA1943 electrically connects by two resistance R 0, R1 and plug connector P5, and the emitter of this two PNP audio power amplifying triode 2SA1943 all electrically connects with a 12V power supply.In this specific embodiment, resistance R 0, R1 all adopt the measuring resistance Res2 of 47K, are connected in parallel between this two resistance.
8 heated probe of the present utility model are connected with heating module 50 by 8 wire jumper interface JP1-JP8 on the heating module 50 respectively.Described main control singlechip 30 and CMOS single-chip microcomputer 40 all electrically connect by a Sheffer stroke gate and heating module 50, and this main control singlechip 30 also electrically connects by a 74hc138 code translator (not shown) and heating module 50.Wherein, main control singlechip 30 has only a drive test amount passage in work by the control of 74hc138 code translator at every turn, i.e. each which heated probe of control heats, and determines when heat.Under the abnormal conditions uncontrollable situation heat time heating time can appear at taking place in experimentation, the utility model increases CMOS single-chip microcomputer 40 and cooperates the PIC16F74 single-chip microcomputer to finish the thermal pulse control of heat time heating time, surpass certain hour by CMOS single-chip microcomputer 40 hard closings heating in heating, long burn out crop to prevent that main control singlechip 30 is not normal to heat time heating time.In the utility model specific embodiment, main control singlechip 30 is selected the measurement passage by 3 io mouths of PIC16F74 single-chip microcomputer with the 74hc138 code translator, and controlling each, to measure channel measurement time be 10 minutes, start working at each passage and to control the heating of corresponding heated probe in 20 seconds, be 2 seconds heat time heating time.If misprogramming, surpass 2 seconds heat time heating time, and then the AT89C2051 single-chip microcomputer can force control to stop heating.
In addition, described main control singlechip 30 can also electrically connect a real time clock circuit, memory module, ambient temperature measurement module and supply voltage measurement module (not shown).In the utility model specific embodiment, this real time clock circuit can adopt the PCF8563 chip, memory module can be the SD card memory, it is the digital temperature sensor of DS18B20 that the ambient temperature measurement module can adopt model, and it is the operational amplifier of TLC27L4 that the supply voltage measurement module can adopt model.In the utility model, the data of each channel measurement can be in real time serial ports by main control singlechip 30 be sent to a host computer (not shown) and locate, when changing passage, data peaks point, zero crossing, the acquisition time that a last passage can be collected send to external memory module, so that experiment finishes data are handled.Simultaneously, main control singlechip 30 can also obtain the time of system in real time by real time clock circuit, obtain the temperature in bad border on every side in real time by the ambient temperature measurement module, measure supply voltage by the supply voltage measurement module, whether normally whether need to change battery conveniently to know supply voltage.As a kind of preferred embodiment of the present utility model, can also utilize MATLAB to produce the host computer monitoring software that measurement data is received, analyzes, handles.Main control singlechip 30 is sent to the host computer place with measurement data, monitoring software in this host computer can use RS-232 to receive the data that main control singlechip 30 sends over, and measurement data can be gone out wave pattern at the host computer real-time rendering, handled easily personnel analyze measurement data, thus the transpiration rate of convenient research crop.
In sum, trees stemflow flowmeter of the present utility model, thereby it is by the zero crossing of finding out the signal wave point, the speed (being the crop liquid flowing rate) that peak value is asked for moisture movement, thereby according to above-mentioned crop flow quantity, every day transpiration rate formula, by the inside programming algorithm, the stemflow amount that measures can be converted into transpiration rate, easy to operate, what obtain directly is the tree transpiration amount; Simultaneously, the kernel processor chip that it adopts low-power consumption is beneficial to actual field test; Moreover its thermal pulse is flexible heat time heating time, can be according to trees thermal motion characteristic adaptively changing heat time heating time; In addition, the heating of its thermal pulse is controlled, by an AT89C2051 single-chip microcomputer and main control singlechip Collaborative Control heat time heating time, when the program fleet hard closing is heated; The utility model also adopts 16 ADC chip AD7795, improves the degree of accuracy of measurement data greatly, can be good at instructing the actual irrigation demand.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1. a trees stemflow flowmeter is characterized in that, the modulus conversion chip that comprises the multichannel stem flow sensor, electrically connects with stem flow sensor, the main control singlechip that electrically connects with modulus conversion chip, and CMOS single-chip microcomputer; Described main control singlechip and CMOS single-chip microcomputer all electrically connect with a heating module, are electrically connected with respectively the heated probe with the corresponding setting of multichannel stem flow sensor on this heating module.
2. trees stemflow flowmeter as claimed in claim 1 is characterized in that, described multichannel stem flow sensor comprises 8 road stem flow sensors, the corresponding heated probe of each road stem flow sensor; Upper and lower two sensor probes have been included in this each road stem flow sensor, the stem that these upper and lower two sensor probes are installed on the trees stem is on same straight line, and described heated probe is inserted in the trees stem between upper and lower two sensor probes corresponding with it.
3. trees stemflow flowmeter as claimed in claim 2 is characterized in that, described modulus conversion chip adopts the ADC chip, and this ADC chip is that model is the modulus conversion chip of AD7795.
4. trees stemflow flowmeter as claimed in claim 2 is characterized in that, it is single-chip microcomputer or the arm single-chip microcomputer of PIC16F74 that described main control singlechip adopts model.
5. trees stemflow flowmeter as claimed in claim 4 is characterized in that, it is the single-chip microcomputer of AT89C2051 that described CMOS single-chip microcomputer adopts model.
6. trees stemflow flowmeter as claimed in claim 1 is characterized in that, described heating module is a thermal pulse heating plate, includes the double plug connector of 14PIN altogether of a connection main control singlechip on this thermal pulse heating plate; Also be provided with 8 wire jumper interfaces on this heating module, these 8 wire jumper interface one ends all are connected with plug connector by a field effect transistor, these 8 wire jumper interface other ends all electrically connect with the collector of two PNP audio power amplifying triodes, the base stage of this two PNP audio power amplifying triode electrically connects by two resistance and plug connector, and the emitter of this two PNP audio power amplifying triode all electrically connects with a 12V power supply.
7. trees stemflow flowmeter as claimed in claim 6, it is characterized in that, described main control singlechip and CMOS single-chip microcomputer all electrically connect by a Sheffer stroke gate and thermal pulse heating plate, and this main control singlechip also electrically connects by a 74hc138 code translator and thermal pulse heating plate.
8. trees stemflow flowmeter as claimed in claim 1 is characterized in that, described main control singlechip also is electrically connected with real time clock circuit, memory module, ambient temperature measurement module and supply voltage measurement module.
9. trees stemflow flowmeter as claimed in claim 8, it is characterized in that, described this real time clock circuit adopts the PCF8563 chip, and it is the digital temperature sensor of DS18B20 that the ambient temperature measurement module adopts model, and it is the operational amplifier of TLC27L4 that the supply voltage measurement module adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320132588 CN203191336U (en) | 2013-03-21 | 2013-03-21 | Tree stem flow measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320132588 CN203191336U (en) | 2013-03-21 | 2013-03-21 | Tree stem flow measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203191336U true CN203191336U (en) | 2013-09-11 |
Family
ID=49108189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320132588 Expired - Fee Related CN203191336U (en) | 2013-03-21 | 2013-03-21 | Tree stem flow measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203191336U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108700538A (en) * | 2016-01-12 | 2018-10-23 | Telofarm有限公司 | For measure plant sap flow micropin probe and with its sap flow measurement devices |
| CN110568020A (en) * | 2019-09-12 | 2019-12-13 | 安徽农业大学 | Plant liquid flow monitoring device and method |
| CN112185432A (en) * | 2020-09-27 | 2021-01-05 | 深圳市安信达存储技术有限公司 | Temperature control type solid state disk applied to low-temperature environment and temperature control method |
-
2013
- 2013-03-21 CN CN 201320132588 patent/CN203191336U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108700538A (en) * | 2016-01-12 | 2018-10-23 | Telofarm有限公司 | For measure plant sap flow micropin probe and with its sap flow measurement devices |
| CN108700538B (en) * | 2016-01-12 | 2021-06-29 | Telofarm有限公司 | Microneedle probe for measuring sap flow of plant and sap flow measuring device having the same |
| CN110568020A (en) * | 2019-09-12 | 2019-12-13 | 安徽农业大学 | Plant liquid flow monitoring device and method |
| CN112185432A (en) * | 2020-09-27 | 2021-01-05 | 深圳市安信达存储技术有限公司 | Temperature control type solid state disk applied to low-temperature environment and temperature control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203191336U (en) | Tree stem flow measuring instrument | |
| CN206002882U (en) | A kind of multiple sensor signal acquisition circuit based on ADS7823 | |
| CN103149243B (en) | Tree heat pulse transpiration determinator and measuring method thereof | |
| CN202494677U (en) | Small-size integration multi-parameter water quality digital online detector | |
| CN104686079A (en) | Cutting platform height automatic control system based on electro-hydraulic control | |
| CN202757808U (en) | Constant-flow air sampler | |
| CN204272021U (en) | Multichannel light photovoltaic assembly energy output test data collection system | |
| CN206072476U (en) | A kind of valve control device adjusted for fluid flow | |
| CN101858759A (en) | Multi-channel agricultural measuring device based on MCU | |
| CN204698988U (en) | A kind of fumigating bed intelligence control system based on Internet of Things | |
| CN203053474U (en) | Vibrating wire sensor adapter compatible with SDI-12 protocol | |
| CN204008003U (en) | A kind of pin-point accuracy pressure controller | |
| CN201194028Y (en) | Temperature, humidity and dew point transmitter | |
| CN104737638A (en) | Garden shovel capable of measuring humidity | |
| CN213423040U (en) | Plant liquid flow monitoring device | |
| CN105698665A (en) | Device for automatically measuring farm machinery tillage depth | |
| CN204495392U (en) | A kind of high-accuracy temperature-humidity sensor device | |
| CN204903052U (en) | Digital manometer | |
| CN203870788U (en) | Heat data acquisition device based on MBUS bus | |
| CN104729576A (en) | Temperature and humidity transmitter | |
| CN203572516U (en) | Natural gas energy metering device | |
| CN203594016U (en) | Multi-channel roadbed temperature collection circuit | |
| CN104965548A (en) | Clean room temperature and humidity measuring and controlling device | |
| CN202731884U (en) | Intelligent feedback measurement and control device for borehole water-pressure test | |
| CN204650327U (en) | A kind of toilet temperature and humidity filed device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20150321 |
|
| EXPY | Termination of patent right or utility model |