CN103175890A - Electromagnetic induction principle based humidity sensor - Google Patents
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Abstract
An electromagnetic induction principle based humidity sensor comprises an alternating frequency power supply, a voltage tester, a data box, a humidity induction head and a display, the humidity induction head is connected with the alternating frequency power supply through a twin core cable, and is connected with the voltage tester through a four core cable, one end of the data box is connected with the display through a data line, and the other end of the data box is connected with the voltage tester through a data line. The electromagnetic induction principle based humidity sensor has the advantages of real time, good stability, and small restriction of the application range, makes up the disadvantages of a present humidity sensor, can be used in severe environments comprising strong corrosivity, many volatile organic compounds, high humidity and the like for a long term, and has huge economic, environmental and social benefits. Additionally, the electromagnetic induction principle based humidity sensor can be regularly calibrated according to actual needs to reach the proposes comprising service life prolongation and precision guarantee.
Description
Technical field
The present invention relates to a kind of sensor, particularly based on the humidity sensor of electromagnetic induction principle.
Background technology
Humidity is widely used in the every field such as meteorology, environmental monitoring, space flight, industrial and agricultural production and daily life thereof as an important environmental parameters.Traditional measurement method and equipment mainly contain wet-and-dry bulb thermometer, hair hygrometer and dew point instrument etc.; Along with development in science and technology, emerge a large amount of Novel humidity sensors.Humidity sensor refers to can be used for detecting the sensor of external environment humidity, and it can be converted to the survey ambient humidity is convenient to electricity (frequency) signal of processing, show, recording etc.Humidity sensor mainly is divided into condenser type, resistance-type and current type etc. by its principle of work and version.Compare with traditional environment hygroscopy method, humidity sensor has accurately, real-time and simple operation and other advantages; But it still exists to a certain degree not enough, main manifestations be expensive, volume large, long-time stability and low precision (time float to float phenomenon serious with temperature), the life-span is partially short, working range finite sum environment for use conditional request harsh (as being used for high warm and humid, static, radiation, acid/alkali/dust and containing the environment such as organic solvent) etc.; Existing humidity sensor applicability is still waiting to improve, and should not be used in high humidity environment because of the employing capacitance electrode as Miniature humidity sensor (patent No. is ZL03131859.2).Along with development in science and technology, the industry-by-industries such as scientific research, production and life require more and more higher to sensor performance, be necessary to research and develop suitable novel, extraordinary humidity sensor.
Summary of the invention
In order to make up under existing humidity sensor working range finite sum particular job environmental baseline the measuring accuracy partially short deficiency that waits on the low side and serviceable life, the invention provides the humidity sensor based on electromagnetic induction principle.
In order to realize above-mentioned technical purpose, technical scheme of the present invention is, humidity sensor based on electromagnetic induction principle, it is characterized in that, comprise and hand over frequency power, voltage tester, data capsule, humidity inductive head and display, the humidity inductive head connects by twin core cable hands over frequency power, and the humidity inductive head connects voltage tester by quad, voltage tester is by data line connection data box, and data capsule connects display by data line.Humidity sensor based on electromagnetic induction principle is made of friendship frequency power, voltage tester, data capsule, humidity inductive head and display, the humidity inductive head connects by twin core cable hands over frequency power, also connect voltage tester by quad, data capsule one end connects display by data line, and the other end connects voltage tester by data line.the present invention is based on electromagnetic induction principle, utilize solenoid to connect when handing over frequency power, the alternating current of its inner transition can produce the electromagnetic field of alternation around it, can produce induction electromotive force in corresponding inductive coil, because air humidity (or contained steam) difference makes corresponding air permeability have difference, and then cause change of magnetic field strength, this species diversity can detect the induction electromotive force that inductive coil produces by voltage tester and weigh, utilize air humidity that data capsule stores and the corresponding relation between induction electromotive force, can indirectly obtain humidity parameter under the varying environment condition, and realize visual output by display.During enforcement, described humidity sensor is placed in environment to be measured, connects and hand over frequency power, can test environment humidity.The present invention in real time, good stability, usable range limitation be little, made up the deficiency of existing humidity sensor, has huge economy, environmental and social benefits.In addition, the present invention also can according to actual needs by periodic calibration, reach the prolongation application target.The present invention can be used for ambient humidity and detects, be particularly useful for that long-term existence corrosivity is strong, volatile organic matter is more and the rugged surroundings such as high humidity in.
Feature of the present invention is that also described friendship frequency power is the substation transformer of the alternating current of different frequency and power.Its effect is that different frequency and strong and weak alternating current can be provided according to the actual requirements, is the electric power system of whole device.
Feature of the present invention is that also described voltage tester is the high-precision AC electric tester, and its effect is the induction electromotive force that produces for measuring inductive coil, and to the data capsule transmission data of surveying.
Feature of the present invention is that also described data capsule can connect voltage tester by data line, and connects display by data line, utilizes the induction electromotive force of storage and the corresponding relation between humidity to transform, and realizes data result output.
Feature of the present invention is that also described display is touch screen or non-touch screen digital display type Output Display Unit, and the data that can be used for showing the data capsule transmission realize visual, and it is the whole system outlet terminal.
Feature of the present invention is that also described humidity inductive head comprises cylindrical shell, bottom in cylindrical shell is provided with pedestal, the protruding twin core cable of pedestal and quad, be provided with fixed support on pedestal, be provided with inductive coil on fixed support, inductive coil is distributed with solenoid outward, and cylindrical shell upper opening position is provided with protection network, protection network fixes in cylindrical shell upper opening position by cutting ferrule, and protection network and cylindrical shell rotation angle position also are provided with rubber seal.Solenoid and inductive coil are fixed on fixed support, the solenoid two ends connect by twin core cable hands over frequency power, the inductive coil two ends utilize quad to connect voltage tester, twin core cable and quad penetrate cylindrical shell by cylinder body bottom, and be fixed on the cylinder body bottom pedestal together with fixed support, rubber seal compresses the protection network periphery, and by cutting ferrule, itself and cylinder top outer waterproof screw thread is screwed.During enforcement, connect solenoid and hand over frequency power by twin core cable, utilize solenoid to connect when handing over frequency power, the alternating current of its inner transition can be at its electromagnetic field that change on every side, corresponding inductive coil can produce induction electromotive force, because air humidity (or contained steam) difference makes corresponding air permeability have difference, this species diversity can detect the induction electromotive force that inductive coil produces by voltage tester and characterize, utilize the corresponding relation between different humidity and induction electromotive force in air, can indirectly obtain the ambient humidity parameter.The present invention is based on a theory proposes, make up traditional employing contact or (as manyly in capacitance type humidity sensor caused capacitance variations based on coating substance on humidity-sensitive element and water reaction or combination in conjunction with theory, the resistance-type humidity sensor changes based on contact or the resistance that causes in conjunction with water) deficiency, therefore can get rid of external environment factor impact (as high humidity, severe cold or radiation etc.), can satisfy long-term stable operation requirement under certain environmental conditions.Described cylindrical shell is that copper or aluminium class nonmagnetic metal, phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and polymer-modified resinous material thereof are made, and plays the whole inductive means of protection and fixation; Described protection network is that copper or aluminium class nonmagnetic metal, carbon fiber, viscose rayon, polyamide fibre, terylene and aramid fiber net are made through siloxane or the processing of fluorosilicone class hydrophobic material, rises to stop an extraneous large particulate matter to enter in cylinder and a protective action; Described fixed support and pedestal are that phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and modified resin class thereof are that body is made, and play fixing and position-limiting action; Described cutting ferrule is to be made by anticorrosion metal material or organic polymer, jointly plays sealing and connection function with the waterproof screw thread.
Feature of the present invention is that also described solenoid is enameled wire loop, connects the outside frequency power of handing over by twin core cable, in order to the electromagnetic field that changes, is the parts that excite of whole system after the connection circuit.
Feature of the present invention is that also described inductive coil is enameled wire loop, connects voltage tester by quad, change of magnetic field strength occurs in order to detection system, and then produces induction electromotive force, is the coordination portion of whole system.
Feature of the present invention is that also described friendship frequency power, voltage tester, data capsule and display can be single instrument series connection and use, also can assemble and become one, and be connected the humidity inductive head with twin core cable by quad, and then reach rational deployment, simplified apparatus effect.
Feature of the present invention is that also fixed support and pedestal adopt phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or allyl resin to make as body, the modified resin that perhaps adopts phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or allyl resin is that body is made, and plays fixing and position-limiting action.
Feature of the present invention also is to hand over frequency power, voltage tester, data capsule and display to can be single instrument series connection and uses, and also can assemble to become one, and pass through quad or/and twin core cable connects the humidity inductive head.
The invention has the beneficial effects as follows:
1, the present invention has in real time, good stability, usable range limitation be little, has made up the deficiency of existing humidity sensor, also can according to actual needs by periodic calibration, reach the prolongation application target.
2, adopt the present invention can measure for a long time that corrosivity is strong, volatile organic matter is more and the rugged surroundings such as high humidity in humidity parameter.
3, the present invention is based on the electromagnetic field principle proposes, make up traditional employing contact or (as manyly in capacitance type humidity sensor caused capacitance variations based on coating substance on humidity-sensitive element and water reaction or combination in conjunction with theory, the resistance-type humidity sensor changes based on contact or the resistance that causes in conjunction with water) deficiency, therefore can get rid of external environment factor impact (as high humidity, severe cold or radiation etc.), can satisfy long-term stable operation requirement under certain environmental conditions.
Description of drawings
Fig. 1 is that the embodiment of the present invention is based on the planar structure schematic diagram of the humidity sensor of electromagnetic induction principle;
Fig. 2 is humidity inductive header structure sectional view of the present invention;
Fig. 3 is fixing rack structure schematic diagram of the present invention;
Wherein 1 is the humidity inductive head, and 2 is voltage tester, and 3 is data capsule, 4 is rubber seal, and 5 for handing over frequency power, and 6 is display, 7 is data line, and 8 is twin core cable, and 9 is quad, 10 is the waterproof screw thread, and 11 is fixed support, and 12 is solenoid, 13 is inductive coil, and 14 is cutting ferrule, and 15 is pedestal, 16 is protection network, and 17 is cylindrical shell.
Embodiment
Following embodiment is to the further illustrating of the technology of the present invention content, but is not the restriction to flesh and blood of the present invention.
Humidity sensor based on electromagnetic induction principle comprises friendship frequency power 5, voltage tester 2, data capsule 3, humidity inductive head 1 and display 6, humidity inductive head 1 connects by twin core cable 8 hands over frequency power 5, humidity inductive head 1 connects voltage tester 2 by quad 9, voltage tester 2 is by data line 7 connection data boxes 3, and data capsule 3 connects display 6 by data line 7.Fig. 1 is that the embodiment of the present invention is based on the planar structure schematic diagram of the humidity sensor of electromagnetic induction principle, as shown in Figure 1, humidity inductive head 1 connects by twin core cable 8 hands over frequency power 5, also connect voltage tester 2 by quad 9, data capsule 3 one ends connect display 6 by data line 7, and the other end connects voltage tester 2 by data line 7.Fig. 2 is humidity sensor head sectional view of the present invention, as shown in Figure 2, humidity inductive head 1 comprises cylindrical shell 17, protection network 16, rubber seal 4, cutting ferrule 14, waterproof screw thread 10, fixed support 11, solenoid 12, inductive coil 13, pedestal 15, quad 9 and twin core cable 8, solenoid 12 and inductive coil 13 are fixed on fixed support 11, solenoid 12 two ends connect by twin core cable 8 hands over frequency power 5, inductive coil 13 two ends utilize quad 9 to connect voltage tester 2, twin core cable 8 and quad 9 are penetrated by the bottom of cylindrical shell 17, and be fixed in together with fixed support 11 on the pedestal 15 of cylindrical shell 17 bottoms, rubber seal 4 compresses protection network 16 peripheries, and screwed by outer, the top waterproof screw thread 10 of cutting ferrule 14 with itself and cylindrical shell 17.Fig. 3 is fixing rack structure figure of the present invention, and as shown in Figure 3, fixed support is right cylinder, and the bottom is hollow-core construction, so that fix with pedestal, the fixed support right cylinder is provided with vertical outstanding structure, can play fixing and position-limiting action.
Feature of the present invention is that also described friendship frequency power 5 for the substation transformer of the alternating current of different frequency and power, is the electric power system of whole device.
Feature of the present invention is that also described voltage tester 2 is the high-precision AC electric tester, and its effect is the induction electromotive force that produces for measuring inductive coil 13, and to the data capsule 3 transmission data of surveying.
Feature of the present invention is that also described data capsule 3 can connect voltage tester 2 by data line, and connects display 6 by data line 7, utilizes the induction electromotive force of storage and the corresponding relation between humidity to transform, and realizes data result output.
Feature of the present invention is that also described display 6 is touch screen or non-touch screen digital display type Output Display Unit, and the data that can be used for showing data capsule 3 transmission realize visual, and it is the whole system outlet terminal.
feature of the present invention is that also described humidity inductive head 1 comprises cylindrical shell 17, protection network 16, rubber seal 4, cutting ferrule 14, waterproof screw thread 10, fixed support 11, solenoid 12, inductive coil 13, pedestal 15, quad 9 and twin core cable 8, solenoid 12 and inductive coil 13 are fixed on fixed support 11, solenoid 12 two ends connect by twin core cable 8 hands over frequency power 5, inductive coil 13 two ends utilize quad 9 to connect voltage tester 2, twin core cable 8 and quad 9 are penetrated by the bottom of cylindrical shell 17, and be fixed in together with fixed support 11 on cylindrical shell 17 bottom base 15, rubber seal 4 compresses protection network 16 peripheries, and by cutting ferrule 14, itself and cylindrical shell 17 outer, top waterproof screw threads 10 are screwed.
Feature of the present invention is that also described cylindrical shell 17 makes for copper or aluminium class nonmagnetic metal, phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and polymer-modified resinous material thereof, plays the whole inductive means of protection and fixation; Described protection network 16 is that copper or aluminium class nonmagnetic metal, carbon fiber, viscose rayon, polyamide fibre, terylene and aramid fiber net are made through siloxane or the processing of fluorosilicone class hydrophobic material, rises to stop an extraneous large particulate matter to enter an interior and protective action; Described fixed support 11 and pedestal 15 are that phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and modified resin class thereof are that body is made, and play fixing and position-limiting action; Described cutting ferrule 14 is to be made by anticorrosion metal material or organic polymer, jointly plays sealing and connection function with waterproof screw thread 10.
Feature of the present invention is that also described solenoid 12 is enameled wire loop, connects the outside frequency power 5 of handing over by twin core cable 8, in order to change electromagnetic field, is the parts that excite of whole system after the connection circuit.
Feature of the present invention is that also described inductive coil 13 is enameled wire loop, connects voltage tester 2 by quad 9, change of magnetic field strength occurs in order to detection system, and then produce induction electromotive force, and be the coordination portion of whole system.
Feature of the present invention is that also described friendship frequency power 5, voltage tester 2, data capsule 3 and display 6 can be single instrument series connection and use, also can assemble and become one, and are connected with twin core cable by quad 9 and connect humidity inductive head 1, and then reach rational deployment, simplified apparatus effect.
during enforcement, connect solenoid 12 and hand over frequency power 5 by twin core cable 8, utilize solenoid 12 to connect when handing over frequency power 5, the alternating current of its inner transition can be at its electromagnetic field that change on every side, corresponding inductive coil 13 can produce induction electromotive force, because air humidity (or contained steam) difference makes corresponding air permeability have difference, this species diversity can detect the induction electromotive force that inductive coil 13 produces by voltage tester 2 and characterize, utilize air humidity that data capsule 3 stores and the corresponding relation between induction electromotive force, can indirectly obtain humidity parameter under the varying environment condition, and realize visual output by display 6, and then measure ambient humidity.
Claims (10)
1. based on the humidity sensor of electromagnetic induction principle, it is characterized in that, comprise and hand over frequency power, voltage tester, data capsule, humidity inductive head and display, the humidity inductive head connects by twin core cable hands over frequency power, the humidity inductive head connects voltage tester by quad, voltage tester is by data line connection data box, and data capsule connects display by data line.
2. the humidity sensor based on electromagnetic induction principle according to claim 1, is characterized in that, described friendship frequency power is the substation transformer of the alternating current of different frequency and power.
3. the humidity sensor based on electromagnetic induction principle according to claim 1, is characterized in that, described voltage tester is the high-precision AC electric tester.
4. the humidity sensor based on electromagnetic induction principle according to claim 1, is characterized in that, described data capsule connects voltage tester by wire, and data capsule can be converted into corresponding data with the induced voltage of voltage tester test.
5. the humidity sensor based on electromagnetic induction principle according to claim 1, is characterized in that, described display is touch screen or non-touch screen digital display type Output Display Unit, can show the data of data capsule transmission.
6. the humidity sensor based on electromagnetic induction principle according to claim 1, it is characterized in that, described humidity inductive head comprises cylindrical shell, bottom in cylindrical shell is provided with pedestal, the protruding twin core cable of pedestal and quad, be provided with fixed support on pedestal, be provided with inductive coil on fixed support, inductive coil is distributed with solenoid outward, cylindrical shell upper opening position is provided with protection network, protection network fixes in cylindrical shell upper opening position by cutting ferrule, and protection network and cylindrical shell rotation angle position also are provided with rubber seal.
7. the humidity sensor based on electromagnetic induction principle according to claim 6, it is characterized in that, described cylindrical shell is copper or aluminium class nonmagnetic metal, phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin, allyl resin or/and polymer-modified resinous material is made.
8. the humidity sensor based on electromagnetic induction principle according to claim 6, it is characterized in that, described protection network is that copper class or aluminium class nonmagnetic metal net, carbon fibre web, viscose web, polyamide fibre net, terylene net or aramid fiber net are made through type siloxane or the processing of fluorosilicone class hydrophobic material, plays protective action.
9. the humidity sensor based on electromagnetic induction principle according to claim 6, is characterized in that, described cutting ferrule is to be made by anticorrosion metal material or organic polymer, jointly plays sealing and connection function with the waterproof screw thread; Perhaps solenoid is enameled wire loop, in order to the electromagnetic field that changes; Perhaps inductive coil is enameled wire loop, works the induction electromotive force effect that produces; Perhaps fixed support and pedestal adopt phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or allyl resin to make as body, the modified resin that perhaps adopts phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or allyl resin is that body is made, and plays fixing and position-limiting action.
10. the humidity sensor based on electromagnetic induction principle according to claim 1, it is characterized in that, described friendship frequency power, voltage tester, data capsule and display are the use of connecting successively of single instrument, perhaps hand over the mode of frequency power, voltage tester, data capsule and display assembling to become one, and pass through quad or/and twin core cable connects the humidity inductive head.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104075756A (en) * | 2014-07-21 | 2014-10-01 | 青岛理工大学 | Multi-element composite wireless monitoring system for durability of concrete structure |
| CN107576691A (en) * | 2017-09-26 | 2018-01-12 | 佛山市川东磁电股份有限公司 | Humidity sensor in a kind of chemical experiment room |
| CN107817272A (en) * | 2016-09-13 | 2018-03-20 | 现代自动车株式会社 | Diesel fuel quality checks equipment and diesel fuel quality inspection method |
| CN109946342A (en) * | 2019-03-27 | 2019-06-28 | 湘潭大学 | A kind of fresh-keeping detection device of Portable grain |
| CN110308249A (en) * | 2019-07-12 | 2019-10-08 | 姜超 | A kind of humidity sensor |
| CN112798651A (en) * | 2019-11-13 | 2021-05-14 | 中国科学院化学研究所 | Passive humidity detection system based on electromagnetic induction |
| CN112958489A (en) * | 2021-03-24 | 2021-06-15 | 刘小洁 | Lighting lamp inspection equipment for quality inspection of lamps |
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| US5855721A (en) * | 1997-03-11 | 1999-01-05 | The Regents Of The University Of California | Non-destructive method of determining the position and condition of reinforcing steel in concrete |
| US6639401B2 (en) * | 2001-07-19 | 2003-10-28 | The Hong Kong University Of Science And Technology | Contactless, transformer-based measurement of the resistivity of materials |
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| CN202350826U (en) * | 2011-11-07 | 2012-07-25 | 中南大学 | Waterproof temperature humidity sensor |
| CN202393400U (en) * | 2011-11-07 | 2012-08-22 | 中南大学 | Anti-corrosion humiture sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075756A (en) * | 2014-07-21 | 2014-10-01 | 青岛理工大学 | Multi-element composite wireless monitoring system for durability of concrete structure |
| CN107817272A (en) * | 2016-09-13 | 2018-03-20 | 现代自动车株式会社 | Diesel fuel quality checks equipment and diesel fuel quality inspection method |
| CN107576691A (en) * | 2017-09-26 | 2018-01-12 | 佛山市川东磁电股份有限公司 | Humidity sensor in a kind of chemical experiment room |
| CN109946342A (en) * | 2019-03-27 | 2019-06-28 | 湘潭大学 | A kind of fresh-keeping detection device of Portable grain |
| CN110308249A (en) * | 2019-07-12 | 2019-10-08 | 姜超 | A kind of humidity sensor |
| CN112798651A (en) * | 2019-11-13 | 2021-05-14 | 中国科学院化学研究所 | Passive humidity detection system based on electromagnetic induction |
| CN112958489A (en) * | 2021-03-24 | 2021-06-15 | 刘小洁 | Lighting lamp inspection equipment for quality inspection of lamps |
| CN112958489B (en) * | 2021-03-24 | 2023-01-13 | 广东明承科技有限公司 | Lighting lamp inspection equipment for quality inspection of lamps |
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| CN103175890B (en) | 2015-07-08 |
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