CN201225998Y - Heat dissipation stemflow sensor - Google Patents
Heat dissipation stemflow sensor Download PDFInfo
- Publication number
- CN201225998Y CN201225998Y CNU2008201089366U CN200820108936U CN201225998Y CN 201225998 Y CN201225998 Y CN 201225998Y CN U2008201089366 U CNU2008201089366 U CN U2008201089366U CN 200820108936 U CN200820108936 U CN 200820108936U CN 201225998 Y CN201225998 Y CN 201225998Y
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- temperature
- probe
- sensing element
- thermopair
- compensating lines
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Abstract
The utility model discloses a heat dissipation stemflow sensor which consists of a first probe, a second probe and a connection terminal. Both the first probe and the second probe are tubular; the inner cavity of the first probe is provided with a first temperature sensitive element; the first temperature sensitive element is connected with the connection terminal through a power line; the inner cavity of the second probe is provided with a second temperature sensitive element and the second temperature sensitive element is connected with the connection terminal through a second lead. The product has a simple structure, is conveniently mounted, high in reliability and sensitivity, low in cost and good in commonality.
Description
Technical field
The utility model relates to the sensor of directly measuring plant transpiration speed and transpiration rate with the stemflow method, particularly a kind of dissipation of heat stem flow sensor.
Background technology
Transpiration rate of plant and transpiration rate are one of important contents of numerous ambit researchs such as plant physiology, Agricultural Water-Soil Engineering, crop cultivation, hydrology, pedology.Therefore accurately measure the transpiration rate of plant and transpiration rate in the above-mentioned field and the research in the association area significant.The stemflow method is directly to measure a kind of method of plant transpiration speed and transpiration rate.Difference according to measuring principle, the stemflow method generally can be divided into thermal equilibrium stemflow method (heat balance sap flow method), heat pulse stem flow method (heat pulse sap flow method) and dissipation of heat stemflow method (heat dissipation sap flowmethod), when measuring plant transpiration speed and transpiration rate with above-mentioned three kinds of methods, use corresponding sensor, present thermal equilibrium stem flow sensor, the technology of heat pulse stem flow sensor is comparatively ripe, but these two kinds of sensor application limitation are big, and heat balance method of is fit to the less plant of cane, and thermal pulse method is fit to the bigger plant of cane, though existing dissipation of heat stem flow sensor versatility is good, both be fit to the less plant of cane, also be fit to the bigger plant of cane, but complex structure, inconvenience is installed, poor reliability, poor sensitivity, and price height.
The utility model content
For addressing the above problem, the purpose of this utility model provides a kind of dissipation of heat stem flow sensor; This sensor construction is simple, and is easy for installation, and the reliability height is highly sensitive, and price is low, and versatility is good.
For achieving the above object, the utility model is by the following technical solutions:
A kind of dissipation of heat stem flow sensor, form by a probe, No. two probes, connection terminals, a probe, No. two probes all are tubulose, it is characterized in that: be provided with temperature-sensing element in the inner chamber of a probe No. one, this temperature-sensing element links to each other with connection terminal by a lead, the arranged outside of a temperature-sensing element has heating, heating links to each other with connection terminal by power lead, be provided with temperature-sensing element in the inner chamber of No. two probes No. two, No. two temperature-sensing element links to each other with connection terminal by No. two leads.
A described probe constitutes by inner sleeve is nested with outer tube, a described temperature-sensing element is arranged in the inner chamber of inner sleeve, described heating is arranged in the slit between inner sleeve and the outer tube, this heating is made of heating wire, this heating wire is wrapped on the outer wall of inner sleeve, No. one temperature-sensing element is made of thermopair, a described lead is made of two compensating lines, these two compensating lines are welded on respectively on two thermo wires of thermopair, and these two compensating lines are fixed on the inwall of described inner sleeve by high-temperature insulation glue.
A described probe is connected to form by high-resistance metal pipe and plastic tube, the high-resistance metal pipe is arranged on the front end of plastic tube, described heating is made of this high-resistance metal pipe, described power lead passes the sidewall of plastic tube, be connected with the high-resistance metal pipe, a described temperature-sensing element is made of thermopair, this thermopair is arranged in the inner chamber of high-resistance metal pipe, a described lead is made of two compensating lines, these two compensating lines are welded on respectively on two thermo wires of thermopair, and these two compensating lines are fixed on the inwall of described plastic tube by high-temperature insulation glue.
Described No. two temperature-sensing elements are thermopair, and described No. two leads are made of two compensating lines, and these two compensating lines are welded on respectively on two thermo wires of thermopair, and these two compensating lines are fixed on the inwall of described No. two probes by high-temperature insulation glue.
The outside of a described probe is connected with handle.
The outside of described No. two probes is connected with handle.
During use, probe is arranged on the upstream in tested plant cane stemflow district, No. two probes are arranged on the downstream in tested plant cane stemflow district, between probe and No. two probes at a distance of certain distance, No. one probe provides the heating-up temperature signal for collector, and No. two probe provides reference temperature signal for collector.With the continuous probe of heating of certain power, the temperature difference of two probes of continuous coverage is again calculated the stemflow speed of plant by respective formula.This product is easy for installation, and the stemflow computing formula is simple, and cost is also relatively low.What deserves to be mentioned is that by adjusting the length of a probe and No. two probes, can measure the vary in size stemflow speed in plant stem flow district of cane, this product is easy for installation, the stemflow computing formula is simple, and the reliability height is highly sensitive, and cost is also relatively low.
Description of drawings
Fig. 1 is a composition structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model embodiment one.
Fig. 3 is the structural representation of the utility model embodiment two.
Fig. 4 is a user mode synoptic diagram of the present utility model.
Embodiment
Number in the figure
1 inner sleeve, 2 outer tubes, 3 thermopairs
4 compensating lines, 5 compensating lines, 6 thermo wires, 7 thermo wires
8 high-temperature insulation glue, 9 high-temperature insulation glue
No. 10 probe 11 tubules 12 collectors 13 thermopairs
14 compensating lines, 15 compensating lines, 16 thermo wires, 17 thermo wires
18 high-temperature insulation glue, 19 high-temperature insulation glue
20 No. two probe 21 heating wire 22 power leads 23 power leads
24 high-resistance metal pipes, 25 handles, 26 handles, 27 canes
28 connection terminals, 29 sockets, 30 plastic tubes
Embodiment one, please refer to Fig. 1, Fig. 2, the utility model is a kind of dissipation of heat stem flow sensor, by a probe 10, No. two probes 20 and collector 12 are formed, probe 10 constitutes by inner sleeve 1 and outer tube 2 are nested, be provided with temperature-sensing element in the inner chamber of inner sleeve 1 No. one, No. one temperature-sensing element is made of thermopair 3, No. one temperature-sensing element is connected with connection terminal 28 by a lead, a lead is by two compensating lines 4,5 constitute, article two, compensating line 4,5 are welded on two thermo wires 6 of thermopair 3 respectively, on 7, two compensating lines 4,5 respectively by high- temperature insulation glue 8,9 are fixed on the inwall of inner sleeve 1.Be provided with heating in the slit between inner sleeve 1 and the outer tube 2, heating is a heating wire 21, and heating wire 21 is wrapped on the outer wall of inner sleeve 1, and the two ends of heating wire 21 are connected with connection terminal 28 by power lead 22,23 respectively.Connection terminal 28 is connected with socket 29 on the collector 12.The inner structure of collector 12 is a prior art.
No. two probe 20 is made of tubule 11, is provided with temperature-sensing element in the inner chamber of tubule 11 No. two, and No. two temperature-sensing element is connected with connection terminal 28 by No. two leads.No. two temperature-sensing element is made of thermopair 13, No. two lead is made of two compensating lines 14,15, article two, compensating line 14,15 is welded on respectively on two thermo wires 16,17 of thermopair 13, and two compensating lines 14,15 are fixed on the inwall of tubule 11 by high- temperature insulation glue 18,19 respectively.Tubule 11 and outer tube 1 are made by stainless-steel tube.
Embodiment two, please refer to Fig. 3, in the present embodiment, No. one probe 10 is connected to form by high-resistance metal pipe 24 and plastic tube 30, high-resistance metal pipe 24 is arranged on the front end of plastic tube 30, heating is made of this high-resistance metal pipe 24, power lead 22,23 pass the sidewall of plastic tube 30, be connected with high-resistance metal pipe 24, No. one temperature-sensing element is made of thermopair 3, and thermopair 3 is arranged in the inner chamber of high-resistance metal pipe 24, and a lead is by two compensating lines 4,5 constitute, these two compensating lines 4,5 are welded on two thermo wires 6 of thermopair 3 respectively, on 7, two compensating lines 4,5 by high- temperature insulation glue 8,9 are fixed on the inwall of plastic tube 30.The structure of No. two probes 20 is identical with the above embodiments.
The outside that the outside of a probe 10 is connected with 25, No. two probes 20 of handle is connected with handle 26.
Please refer to Fig. 4, during use, probe 10 is arranged on the upstream, stemflow district of tested plant cane 27, No. two probes 20 are arranged on the downstream, stemflow district of tested plant cane 27, between probe 10 and No. two probes 20 at a distance of 10-15cm, No. one probe 10 provides the heating-up temperature signal for collector 12, and No. two probe 20 provides reference temperature signal for collector 12.With the continuous probe 10 of heating of certain power, the temperature difference of two thermopairs of continuous coverage 3,13 is again calculated the stemflow speed of plant by respective formula.This product is easy for installation, and the stemflow computing formula is simple, and the reliability height is highly sensitive, and cost is also relatively low.What deserves to be mentioned is,, can measure the vary in size stemflow speed in plant stem flow district of cane by adjusting the length of a probe 10 and No. two probes 20.
Claims (6)
1. dissipation of heat stem flow sensor, form by a probe, No. two probes, connection terminals, a probe, No. two probes all are tubulose, it is characterized in that: be provided with temperature-sensing element in the inner chamber of a probe No. one, this temperature-sensing element links to each other with connection terminal by a lead, the arranged outside of a temperature-sensing element has heating, heating links to each other with connection terminal by power lead, be provided with temperature-sensing element in the inner chamber of No. two probes No. two, No. two temperature-sensing element links to each other with connection terminal by No. two leads.
2. dissipation of heat stem flow sensor as claimed in claim 1, it is characterized in that: a described probe constitutes by inner sleeve is nested with outer tube, a described temperature-sensing element is arranged in the inner chamber of inner sleeve, described heating is arranged in the slit between inner sleeve and the outer tube, this heating is made of heating wire, this heating wire is wrapped on the outer wall of inner sleeve, No. one temperature-sensing element is made of thermopair, a described lead is made of two compensating lines, these two compensating lines are welded on respectively on two thermo wires of thermopair, and these two compensating lines are fixed on the inwall of described inner sleeve by high-temperature insulation glue.
3. dissipation of heat stem flow sensor as claimed in claim 1, it is characterized in that: a described probe is connected to form by high-resistance metal pipe and plastic tube, the high-resistance metal pipe is arranged on the front end of plastic tube, described heating is made of this high-resistance metal pipe, described power lead passes the sidewall of plastic tube, be connected with the high-resistance metal pipe, a described temperature-sensing element is made of thermopair, this thermopair is arranged in the inner chamber of high-resistance metal pipe, a described lead is made of two compensating lines, these two compensating lines are welded on respectively on two thermo wires of thermopair, and these two compensating lines are fixed on the inwall of described plastic tube by high-temperature insulation glue.
4. dissipation of heat stem flow sensor as claimed in claim 1, it is characterized in that: described No. two temperature-sensing elements are thermopair, described No. two leads are made of two compensating lines, these two compensating lines are welded on respectively on two thermo wires of thermopair, and these two compensating lines are fixed on the inwall of described No. two probes by high-temperature insulation glue.
5. dissipation of heat stem flow sensor as claimed in claim 1 is characterized in that: the outside of a described probe is connected with handle.
6. dissipation of heat stem flow sensor as claimed in claim 1 is characterized in that: the outside of described No. two probes is connected with handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201089366U CN201225998Y (en) | 2008-06-30 | 2008-06-30 | Heat dissipation stemflow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201089366U CN201225998Y (en) | 2008-06-30 | 2008-06-30 | Heat dissipation stemflow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201225998Y true CN201225998Y (en) | 2009-04-22 |
Family
ID=40598893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201089366U Expired - Fee Related CN201225998Y (en) | 2008-06-30 | 2008-06-30 | Heat dissipation stemflow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201225998Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067497A (en) * | 2015-07-27 | 2015-11-18 | 北京师范大学 | Soil moisture infiltration measurement apparatus |
| US10935563B2 (en) * | 2017-03-13 | 2021-03-02 | National University Corporation Kagawa University | Vascular sap flow speed sensor and method of manufacturing vascular sap flow speed sensor |
-
2008
- 2008-06-30 CN CNU2008201089366U patent/CN201225998Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067497A (en) * | 2015-07-27 | 2015-11-18 | 北京师范大学 | Soil moisture infiltration measurement apparatus |
| US10935563B2 (en) * | 2017-03-13 | 2021-03-02 | National University Corporation Kagawa University | Vascular sap flow speed sensor and method of manufacturing vascular sap flow speed sensor |
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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: 20090422 Termination date: 20130630 |