CN101800002B - Humidity sensing characteristic demonstrator for ceramic humidity sensors - Google Patents

Humidity sensing characteristic demonstrator for ceramic humidity sensors Download PDF

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Publication number
CN101800002B
CN101800002B CN2010101443136A CN201010144313A CN101800002B CN 101800002 B CN101800002 B CN 101800002B CN 2010101443136 A CN2010101443136 A CN 2010101443136A CN 201010144313 A CN201010144313 A CN 201010144313A CN 101800002 B CN101800002 B CN 101800002B
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humidity sensor
humidity
resistance
triode
integrated circuit
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CN2010101443136A
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CN101800002A (en
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周殿凤
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Yancheng Teachers University
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Yancheng Teachers University
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Abstract

The invention relates to a humidity sensing characteristic demonstrator for ceramic humidity sensors, which belongs to the technical field of demonstration instruments. The circuit consists of an MgCrO4-TiO2 humidity sensor, a ZmO-Cr2O3 humidity sensor, a ZrO2 humidity sensor, an Al2O3 humidity sensor, a Fe3O4 humidity sensor, a TiO2-V2O5 humidity sensor, an ohm gauge, a resistor, a 5G21 integrated circuit, a triode and a light-emitting diode. The demonstrator is characterized in that one end of each of the MgCrO4-TiO2 humidity sensor, the ZmO-Cr2O3 humidity sensor, the ZrO2 humidity sensor, the Al2O3 humidity sensor, the Fe3O4 humidity sensor and the TiO2-V2O5 humidity sensor connected in parallel is connected with the third pin of the 5G21 integrated circuit, while the other ends are connected with the first resistor through connecting holes respectively; and one end of the ohm gauge is connected with the third pin of the 5G21 integrated circuit, while the other end is connected with a common port of the connecting holes. Due to the adoption of the technical scheme, the demonstrator has the advantages of demonstration of a change relationship between the ceramic humidity sensors made of different materials and the environment humidity, simple circuit and simple and clear operation.

Description

The ceramic humidity sensors humidity sensing characteristic demonstrator
Technical field
The present invention relates to a kind of ceramic humidity sensors humidity sensing characteristic demonstrator, belong to the demonstration instrument technical field.
Background technology
At present, in the teaching of electronic circuit course, because ceramic humidity sensors can be with different made, and the humidity sensing characteristic of the ceramic humidity sensors that different materials is made is different, lecture the humidity sensing characteristic of various ceramic humidity sensors and in circuit, do the time spent, witheredly make an uproar tastelessly, intuitive is poor.
Summary of the invention
The purpose of this invention is to provide a kind of ceramic humidity sensors humidity sensing characteristic demonstrator, can demonstrate the humidity sensing characteristic of the ceramic humidity sensors made from different materials, i.e. the variation relation of the resistance of ceramic humidity sensors and ambient humidity.
The object of the present invention is achieved like this: circuit is by MgCrO 4-TiO 2Humidity sensor, ZmO-Cr 2O 3Humidity sensor, ZrO 2Humidity sensor, Al 2O 3Humidity sensor, Fe 3O 4Humidity sensor, TiO 2-V 2O 5Humidity sensor, ohmmeter, resistance, the 5G21 integrated circuit, triode, light emitting diode is formed, first resistance, the 3rd resistance and the second adjustable resistance series connection, 7 pin of 5G21 integrated circuit connect the positive pole of direct supply, 4 pin of 5G21 integrated circuit connect the negative pole of direct supply, 2 pin of 5G21 integrated circuit link to each other with the 3rd resistance, 3 pin of 5G21 integrated circuit link to each other with the second adjustable resistance, 6 pin of 5G21 integrated circuit link to each other by the base stage of the 4th resistance and triode A, the emitter of triode A connects the negative pole of direct supply, the collector of triode A connects the positive pole of direct supply by the 5th resistance, the collector of triode A links to each other with the base stage of triode F, the emitter of triode F connects the negative pole of direct supply, one end of red light emitting diodes links to each other with the base stage of triode F, the other end connects the positive pole of direct supply by the 6th resistance, one end of green LED links to each other with the collector of triode F, the other end connects the positive pole of direct supply by the 6th resistance, direct supply and power switch series connection, demonstration board links to each other with casing, with the welding of circuit original paper in the circuit board, place the back side of demonstration board, it is characterized in that: MgCrO 4-TiO 2Humidity sensor, ZmO-Cr 2O 3Humidity sensor, ZrO 2Humidity sensor, Al 2O 3Humidity sensor, Fe 3O 4Humidity sensor, TiO 2-V 2O 5End after the humidity sensor parallel connection links to each other with 3 pin of 5G21 integrated circuit, the other end links to each other with first resistance by wiring hole respectively, one end of ohmmeter links to each other with 3 pin of 5G21 integrated circuit, the other end links to each other with the wiring hole common port, the front of demonstration board is equipped with ohmmeter, red light emitting diodes, green LED, the second adjustable resistance, wiring hole and power switch, hygrometer inserts in the casing, and the upper end is fixed on the front of demonstration board, MgCrO 4-TiO 2Humidity sensor, ZmO-Cr 2O 3Humidity sensor, ZrO 2Humidity sensor, Al 2O 3Humidity sensor, Fe 3O 4Humidity sensor, TiO 2-V 2O 5Humidity sensor places casing, and humidifier is arranged in the casing, and the casing front is a transparent panel.Transparent panel is made with organic glass.
Because adopt technique scheme, advantage and good effect that the present invention had are: demonstrate with the ceramic humidity sensors resistance of different materials manufacturing and the variation relation of ambient humidity, circuit is simple, and is easy and simple to handle, comes into plain view.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the structural representation of the embodiment of the invention.
H among the figure 1.MgCrO 4-TiO 2Humidity sensor, H 2.ZmO-Cr 2O 3Humidity sensor, H 3.ZrO 2Humidity sensor, H 4.Al 2O 3Humidity sensor, H 5.Fe 3O 4Humidity sensor, H 6.TiO 2-V 2O 5Humidity sensor.Ω. ohmmeter, B. wiring hole, R 1. first resistance, R 2. the second adjustable resistance, R 3. the 3rd resistance, R 4. the 4th resistance, R 5. the 5th resistance, R 6. the 6th resistance, integrated circuit I.5G21, G 1. triode A, G 2. triode F, G 3. red light emitting diodes, G 4. green LED, K. power switch, E. direct supply, A. demonstration board, Z. hygrometer, C. casing, D. transparent panel, H. humidifier.
Embodiment
In Fig. 1, the first resistance (R 1), the 3rd resistance (R 3) and the second adjustable resistance (R 2) series connection, 7 pin of 5G21 integrated circuit (I) connect the positive pole of direct supply (E), and 4 pin of 5G21 integrated circuit (I) connect the negative pole of direct supply (E), 2 pin of 5G21 integrated circuit (I) and the 3rd resistance (R 3) link to each other 3 pin of 5G21 integrated circuit (I) and the second adjustable resistance (R 2) link to each other, 6 pin of 5G21 integrated circuit (I) are by the 4th resistance (R 4) and triode A (G 1) base stage link to each other, triode A ( G1) emitter connects the negative pole of direct supply (E), triode A (G 1) collector by the 5th resistance (R 5) connect the positive pole of direct supply (E), triode A (G 1) collector and triode F (G 2) base stage link to each other triode F (G 2) emitter connect the negative pole of direct supply (E), red light emitting diodes (G 3) an end and triode F (G 2) base stage link to each other, the other end is by the 6th resistance (R 6) connect the positive pole of direct supply (E), green LED (G 4) an end and triode F (G 2) collector link to each other, the other end is by the 6th resistance (R 6) connect the positive pole of direct supply (E), direct supply (E) and power switch (K) series connection, MgCrO 4-TiO 2Humidity sensor (H 1), ZmO-Cr 2O 3Humidity sensor (H 2), ZrO 2Humidity sensor (H 3), Al 2O 3Humidity sensor (H 4), Fe 3O 4Humidity sensor (H 5), TiO 2-V 2O 5Humidity sensor (H 6) a end after the parallel connection and 3 pin of 5G21 integrated circuit (I) link to each other, the other end is respectively by the wiring hole (B) and the first resistance (R 1) link to each other, an end of ohmmeter (Ω) links to each other with 3 pin of 5G21 integrated circuit (I), and the other end links to each other with wiring hole (B) common port,
In Fig. 2, with the welding of the circuit original paper among Fig. 1 in the circuit board, place the back side of demonstration board (A), demonstration board (A) links to each other with casing (C), and the front of demonstration board (A) is equipped with ohmmeter (Ω), red light emitting diodes (G 3), green LED (G 4), the second adjustable resistance (R 2), wiring hole (B) and power switch (K), hygrometer (Z) inserts in the casing (C), the upper end is fixed on the front of demonstration board (A), MgCrO 4-TiO 2Humidity sensor (H1), ZmO-Cr 2O 3Humidity sensor (H 2), ZrO 2Humidity sensor (H 3), Al 2O 3Humidity sensor (H 4), Fe 3O 4Humidity sensor (H 5), TiO 2-V 2O 5Humidity sensor (H 6) place casing (C), humidifier (H) is arranged in the casing (C), casing (C) front is transparent panel (D).Transparent panel is made with organic glass.
During demonstration, respectively with MgCrO 4-TiO 2Humidity sensor, ZmO-Cr 2O 3Humidity sensor, ZrO 2Humidity sensor, Al 2O 3Humidity sensor, Fe 3O 4Humidity sensor, TiO 2-V 2O 5Humidity sensor links to each other with circuit by wiring hole, regulate variable resistor, make it identical with corresponding humidity sensor resistance, turn on the power switch, by the humidity in the humidifier change casing, demonstrate with the ceramic humidity sensors resistance of different materials manufacturing and the variation relation of ambient humidity according to the reading of hygrometer and ohmmeter.When humidity just often because the resistance of humidity sensor is big, so the level of the comparer inverting input of 5G21 integrated circuit is higher than the level of in-phase input end, comparator input terminal is a low level, green LED is luminous; When high humidity, the resistance of humidity sensor reduces, so the level of the comparer in-phase input end of 5G21 integrated circuit is higher than the level of inverting input, comparator input terminal is a high level, and red light emitting diodes is luminous, and green LED is not luminous.

Claims (3)

1. ceramic humidity sensors humidity sensing characteristic demonstrator, circuit is by MgCrO 4-TiO 2Humidity sensor, ZmO-Cr 2O 3Humidity sensor, ZrO 2Humidity sensor, Al 2O 3Humidity sensor, Fe 3O 4Humidity sensor, TiO 2-V 2O 5Humidity sensor, ohmmeter, resistance, 5G21 integrated circuit, triode, light emitting diode are formed the first resistance (R 1), the 3rd resistance (R 3) and the second adjustable resistance (R 2) series connection, 7 pin of 5G21 integrated circuit (I) connect the positive pole of direct supply (E), and 4 pin of 5G21 integrated circuit (I) connect the negative pole of direct supply (E), 2 pin of 5G21 integrated circuit (I) and the 3rd resistance (R 3) link to each other 3 pin of 5G21 integrated circuit (I) and the second adjustable resistance (R 2) link to each other, 6 pin of 5G21 integrated circuit (I) are by the 4th resistance (R 4) and triode A (G 1) base stage link to each other triode A (G 1) emitter connect the negative pole of direct supply (E), triode A (G 1) collector by the 5th resistance (R 5) connect the positive pole of direct supply (E), triode A (G 1) collector and triode F (G 2) base stage link to each other triode F (G 2) emitter connect the negative pole of direct supply (E), red light emitting diodes (G 3) an end and triode F (G 2) base stage link to each other, the other end is by the 6th resistance (R 6) connect the positive pole of direct supply (E), green LED (G 4) an end and triode F (G 2) collector link to each other, the other end is by the 6th resistance (R 6) connect the positive pole of direct supply (E), direct supply (E) and power switch (K) series connection, demonstration board (A) links to each other with casing (C), it is characterized in that: MgCrO 4-TiO 2Humidity sensor (H 1), ZmO-Cr 2O 3Humidity sensor (H 2), ZrO 2Humidity sensor (H 3), Al 2O 3Humidity sensor (H 4), Fe 3O 4Humidity sensor (H 5), TiO 2-V 2O 5Humidity sensor (H 6) a end after the parallel connection and 3 pin of 5G21 integrated circuit (I) link to each other, the other end is respectively by the wiring hole (B) and the first resistance (R 1) link to each other, an end of ohmmeter (Ω) links to each other with 3 pin of 5G21 integrated circuit (I), and the other end links to each other with wiring hole (B) common port.
2. a kind of ceramic humidity sensors humidity sensing characteristic demonstrator according to claim 1 is characterized in that: the front of demonstration board (A) is equipped with ohmmeter (Ω), red light emitting diodes (G 3), green LED (G 4), the second adjustable resistance (R 2), wiring hole (B) and power switch (K), hygrometer (Z) inserts in the casing (C), the upper end is fixed on the front of demonstration board (A), MgCrO 4-TiO 2Humidity sensor (H 1), ZmO-Cr 2O 3Humidity sensor (H 2), ZrO 2Humidity sensor (H 3), Al 2O 3Humidity sensor (H 4), Fe 3O 4Humidity sensor (H 5), TiO 2-V 2O 5Humidity sensor (H 6) place casing (C), humidifier (H) is arranged in the casing (C), casing (C) front is transparent panel (D).
3. a kind of ceramic humidity sensors humidity sensing characteristic demonstrator according to claim 2, it is characterized in that: transparent panel is made with organic glass.
CN2010101443136A 2010-03-16 2010-03-16 Humidity sensing characteristic demonstrator for ceramic humidity sensors Expired - Fee Related CN101800002B (en)

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CN102520022A (en) * 2012-01-01 2012-06-27 魏传永 Humidity display for agricultural greenhouse

Citations (4)

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Publication number Priority date Publication date Assignee Title
CN87210517U (en) * 1987-09-02 1988-03-23 东北师范大学 Large digital physical measuring shower
JP2005284140A (en) * 2004-03-30 2005-10-13 Sekisui Chem Co Ltd Thermal environment comparison display system of house and method of utilizing the same
CN200979419Y (en) * 2006-11-03 2007-11-21 深圳职业技术学院 A multi-channel gas parameter measuring instrument
CN101261777A (en) * 2008-04-18 2008-09-10 南京化工职业技术学院 Heat sensitive resistance, photosensitive, force sensitive, humidity sensitive resistance, magnetism sensitive resistance variability feature demonstrator

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Publication number Priority date Publication date Assignee Title
KR200447670Y1 (en) * 2009-07-10 2010-02-11 주식회사 케이티이엔지 Energy collection apparatus for the purpose of education

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Publication number Priority date Publication date Assignee Title
CN87210517U (en) * 1987-09-02 1988-03-23 东北师范大学 Large digital physical measuring shower
JP2005284140A (en) * 2004-03-30 2005-10-13 Sekisui Chem Co Ltd Thermal environment comparison display system of house and method of utilizing the same
CN200979419Y (en) * 2006-11-03 2007-11-21 深圳职业技术学院 A multi-channel gas parameter measuring instrument
CN101261777A (en) * 2008-04-18 2008-09-10 南京化工职业技术学院 Heat sensitive resistance, photosensitive, force sensitive, humidity sensitive resistance, magnetism sensitive resistance variability feature demonstrator

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