CN104376768A - Thermistor feature and application experimental instrument - Google Patents
Thermistor feature and application experimental instrument Download PDFInfo
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- CN104376768A CN104376768A CN201410683296.1A CN201410683296A CN104376768A CN 104376768 A CN104376768 A CN 104376768A CN 201410683296 A CN201410683296 A CN 201410683296A CN 104376768 A CN104376768 A CN 104376768A
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- Prior art keywords
- thermistor
- capacitor
- integrated package
- switch
- resistance
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/182—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for components
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- General Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
- Mathematical Analysis (AREA)
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- Business, Economics & Management (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention relates to a thermistor feature and application experimental instrument, and belongs to the field of physical experimental instruments. A circuit is composed of two parts, the first part is a main circuit, and the second part is a temperature and small electric fan adjusting circuit. The thermistor feature and application experimental instrument is characterized in that a rectangular frame is vertically fixed to a demonstration plate, a thermistor and a digital thermometer probe are put on an upper panel in the rectangular frame, a 12-V heating piece is fixed to a lower panel in the rectangular frame, the temperature can be changed by adjusting the magnitude of thermal control potentiometer, a digital thermometer is used for displaying the temperature, a milliammeter is used for demonstrating the current change in the thermistor, an ohmmeter is used for demonstrating the resistance value change of the thermistor, and application of the thermistor is demonstrated by whether a small electric fan rotates or not. The thermistor feature and application experimental instrument has the advantages that demonstration is lively and visual, the feature of the thermistor can be demonstrated, application of the thermistor in life can be demonstrated as well, and the thermistor feature and application experimental instrument can be used for conducting demonstration as well as serving as a student grouping experiment instrument.
Description
Technical field
The present invention relates to a kind of thermistor characteristic and application experiment instrument, belong to physics educational apparatus field.
Background technology
At present, in physics teaching, demonstration instrument about thermistor characteristic can only demonstrate the characteristic of thermistor, the application of thermistor in life can not be demonstrated, student sees that rear not interested, impression is deep, and this experimental apparatus can demonstrate the characteristic of thermistor, can demonstrate again the application of thermistor in life, as teaching demonstration use, student experiment in group instrument can be can be used as again.
Summary of the invention
The object of this invention is to provide a kind of thermistor characteristic and application experiment instrument, the characteristic of thermistor can be demonstrated, the application of thermistor in life can be demonstrated again.
The object of the present invention is achieved like this: circuit is made up of two parts, and Part I is main circuit, and Part II is for regulating temperature and little fan circuit, and main circuit is by direct supply E, switch S
1, switch S
2, thermistor R
t, adjustable resistance R
1, resistance R
2, resistance R
3, integrated package I
1, direct current electromagnetic relay KA (coil), capacitor C
1, capacitor C
2, capacitor C
3, diode VD, milliammeter mA, ohmmeter Ω form, and regulates temperature and little fan circuit by 220V AC power, transformer T, rectification circuit B, capacitor C
4, integrated package I
2, switch S
3, resistance R
4, temperature-adjusting potentiometer R
5, 12V heating plate L, direct current electromagnetic relay KA (normally opened contact), little electric fan M form, the positive pole of direct supply E connects switch S
1one end, switch S
1another terminating capacitor C
1positive pole, capacitor C
1negative pole connect the negative pole of direct supply E, adjustable resistance R
1, milliammeter mA, thermistor R
t, resistance R
2capacitor C is connected in parallel on after four element series connection
1two ends, ohmmeter Ω is connected in parallel on thermistor R
ttwo ends, switch S
2a termination switch S
1the other end, switch S
2the other end simultaneously connecting resistance R
3one end, integrated package I
14 pin and 8 pin, integrated package I
12 pin be connected on adjustable resistance R
1and between milliammeter mA, resistance R
3the other end meet integrated package I simultaneously
16 pin, 7 pin, capacitor C
3positive pole, integrated package I
13 pin connect one end of direct current electromagnetic relay KA (coil), the negative pole of diode VD, the other end of direct current electromagnetic relay KA (coil), the positive pole of diode VD, capacitor C simultaneously
3negative pole be connected after be connected on the negative pole of direct supply E, capacitor C
2a termination integrated package I
15 pin, capacitor C
2the negative pole of another termination direct supply E, integrated package I
11 pin connect the negative pole of direct supply E, two termination AC power 220V of the 220V winding of transformer T, the input end of rectification circuit B is connected on the two ends of the 12V winding of transformer T, integrated package I
2input end be connected on the output terminal of rectification circuit B, switch S
3, resistance R
4, temperature-adjusting potentiometer R
5, 12V heating plate L connect after be connected on integrated package I
2output terminal, the two ends of the 220V winding of transformer T are connected on after the normally opened contact series connection of little electric fan M and direct current electromagnetic relay KA, it is characterized in that: rectangle frame is made up of four orthogonal panels up and down, rectangle frame is vertically fixed on demonstration board, thermistor, digital thermometer probe is placed on the top panel in rectangle frame, 12V heating plate L is fixed on the lower panel in rectangle frame, regulates temperature-adjusting potentiometer R
5large I change temperature, by changing switch S
1, switch S
2switch on and off state, the characteristic of thermistor can be demonstrated, the application of thermistor in life can be demonstrated again, integrated package I
1with NE555, integrated package I
2with three terminal regulator 7812, digital thermometer is used for showing thermistor R
tthe temperature received, milliammeter mA is used for demonstrating thermistor R
tthe change of middle electric current, ohmmeter Ω is used for demonstrating thermistor R
tthe change of resistance, the rotation of little electric fan M with do not rotate for demonstrating thermistor R
tapplication.
Owing to adopting technique scheme, the advantage that the present invention has and good effect are: the characteristic can demonstrating thermistor, can demonstrate again the application of thermistor in life, and structure is simple, and intuitively accurately, operation demonstration is convenient.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1, Fig. 2 are circuit theory diagrams of the present invention.
Fig. 3 is one-piece construction schematic diagram of the present invention.
E. direct supply S in figure
1. switch S
2. switch R
t. thermistor R
1. adjustable resistance R
2. resistance R
3. resistance I
1. integrated package KA. direct current electromagnetic relay (coil, normally opened contact) C
1. capacitor C
2. capacitor C
3. capacitor VD. diode mA. milliammeter Ω. ohmmeter T. transformer M. little electric fan B. rectification circuit C
4. capacitor I
2. three terminal regulator 7812 S
3. switch R
4. resistance R
5. temperature-adjusting potentiometer is heating plate W L.12V
1. digital thermometer W
2. digital thermometer is popped one's head in 1. base 2. demonstration board 3. rectangle frames
Embodiment:
In FIG, the positive pole of direct supply (E) meets switch (S
1) one end, switch (S
1) another terminating capacitor (C
1) positive pole, capacitor (C
1) negative pole connect the negative pole of direct supply (E), adjustable resistance (R
1), (mA), thermistor (R
t), resistance (R
2) be connected in parallel on capacitor (C after four element series connection
1) two ends, ohmmeter (Ω) is connected in parallel on thermistor (R
t) two ends, switch (S
2) a termination switch (S
1) the other end, switch (S
2) the other end simultaneously connecting resistance (R
3) one end, integrated package (I
1) 4 pin and 8 pin, integrated package (I
1) 2 pin be connected on adjustable resistance (R
1) and milliammeter (mA) between, resistance (R
3) the other end meet integrated package (I simultaneously
1) 6 pin, 7 pin, capacitor (C
3) positive pole, integrated package (I
1) 3 pin connect one end of direct current electromagnetic relay (KA) coil, the negative pole of diode (VD), the other end of direct current electromagnetic relay (KA) coil, the positive pole of diode (VD), capacitor (C simultaneously
3) negative pole be connected after be connected on the negative pole of direct supply (E), capacitor (C
2) a termination integrated package I
15 pin, capacitor (C
2) the negative pole of another termination direct supply (E), integrated package (I
1) 1 pin connect the negative pole of direct supply (E).Integrated package (I
1) use NE555.
In fig. 2, the two ends of the 220V winding of transformer (T) are connected on after the normally opened contact series connection of little electric fan (M) and direct current electromagnetic relay (KA), two termination AC power 220V of the 220V winding of transformer (T), the two ends of the 12V winding of the input termination transformer (T) of rectification circuit (B), integrated package (I
2) input end be connected on the output terminal of rectification circuit (B), capacitor (C
4) be connected in parallel on the output terminal of rectification circuit (B), switch (S
3), resistance (R
4), temperature-adjusting potentiometer (R
5), 12V heating plate (L) series connection after be connected on integrated package (I
2) output terminal.
In figure 3, switch (S
1), switch (S
2), switch (S
3), temperature-adjusting potentiometer (R
5), direct current electromagnetic relay (KA), milliammeter (mA), ohmmeter (Ω), digital thermometer (W
1), little electric fan (M) is placed in the front of demonstration board (2); Rectangle frame (3) is made up of four orthogonal panels up and down, and rectangle frame (3) is vertically fixed on demonstration board (2), thermistor (R
t), digital thermometer probe (W
2) be placed in rectangle frame top panel on, 12V heating plate (L) is fixed on the lower panel in rectangle frame (3).Regulate temperature-adjusting potentiometer (R
5) large I change temperature, adjustable resistance (R
1), resistance (R
2), resistance (R
3), resistance (R
4), integrated package (I
1), integrated package (I
2), capacitor (C
1), capacitor (C
2), capacitor (C
3), capacitor (C
4), diode (VD), rectification circuit (B), transformer (T) be fixed on the reverse side of demonstration board (2).
Claims (1)
1. thermistor characteristic and an application experiment instrument, circuit is made up of two parts, and Part I is main circuit, and Part II is for regulating temperature and little fan circuit, and main circuit is by direct supply E, switch S
1, switch S
2, thermistor R
t, adjustable resistance R
1, resistance R
2, resistance R
3, integrated package I
1, direct current electromagnetic relay KA (coil), capacitor C
1, capacitor C
2, capacitor C
3, diode VD, milliammeter mA, ohmmeter Ω form, and regulates temperature and little fan circuit by 220V AC power, transformer T, rectification circuit B, capacitor C
4, integrated package I
2, switch S
3, resistance R
4, temperature-adjusting potentiometer R
5, 12V heating plate L, direct current electromagnetic relay KA (normally opened contact), little electric fan M form, the positive pole of direct supply E connects switch S
1one end, switch S
1another terminating capacitor C
1positive pole, capacitor C
1negative pole connect the negative pole of direct supply E, adjustable resistance R
1, milliammeter mA, thermistor R
t, resistance R
2capacitor C is connected in parallel on after four element series connection
1two ends, ohmmeter Ω is connected in parallel on thermistor R
ttwo ends, switch S
2a termination switch S
1the other end, switch S
2the other end simultaneously connecting resistance R
3one end, integrated package I
14 pin and 8 pin, integrated package I
12 pin be connected on adjustable resistance R
1and between milliammeter mA, resistance R
3the other end meet integrated package I simultaneously
16 pin, 7 pin, capacitor C
3positive pole, integrated package I
13 pin connect one end of direct current electromagnetic relay KA (coil), the negative pole of diode VD, the other end of direct current electromagnetic relay KA (coil), the positive pole of diode VD, capacitor C simultaneously
3negative pole be connected after be connected on the negative pole of direct supply E, capacitor C
2a termination integrated package I
15 pin, capacitor C
2the negative pole of another termination direct supply E, integrated package I
11 pin connect the negative pole of direct supply E, two termination AC power 220V of the 220V winding of transformer T, integrated package I
2input end be connected on the output terminal of rectification circuit, switch S
3, resistance R
4, temperature-adjusting potentiometer R
5, 12V heating plate L connect after be connected on integrated package I
2output terminal, the two ends of the 220V winding of transformer T are connected on after the normally opened contact series connection of little electric fan M and direct current electromagnetic relay KA, it is characterized in that: rectangle frame is vertically fixed on demonstration board, thermistor, digital thermometer probe is placed on the top panel in rectangle frame, 12V heating plate L is fixed on the lower panel in rectangle frame, integrated package I
1with TWH8751, integrated package I
2with three terminal regulator 7812.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410683296.1A CN104376768A (en) | 2014-11-13 | 2014-11-13 | Thermistor feature and application experimental instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410683296.1A CN104376768A (en) | 2014-11-13 | 2014-11-13 | Thermistor feature and application experimental instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104376768A true CN104376768A (en) | 2015-02-25 |
Family
ID=52555651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410683296.1A Pending CN104376768A (en) | 2014-11-13 | 2014-11-13 | Thermistor feature and application experimental instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104376768A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104966444A (en) * | 2015-06-30 | 2015-10-07 | 盐城工业职业技术学院 | Thermo-sensitive sensor, photosensitive sensor, reed switch characteristic and application demonstration instrument |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2361887Y (en) * | 1998-09-15 | 2000-02-02 | 蒋绍斌 | Electronic temp. control switch for electric fan |
| CN2539237Y (en) * | 2002-05-17 | 2003-03-05 | 徐泽湖 | Semiconductor character and its application demonstrator |
| CN101789196A (en) * | 2009-12-23 | 2010-07-28 | 盐城师范学院 | Automatic control switch circuit demonstration instrument |
| CN201820382U (en) * | 2010-07-23 | 2011-05-04 | 南京化工职业技术学院 | Thermistor characteristic demonstration instrument |
| CN204303228U (en) * | 2014-11-13 | 2015-04-29 | 盐城工业职业技术学院 | Thermistor characteristic and application experiment instrument |
-
2014
- 2014-11-13 CN CN201410683296.1A patent/CN104376768A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2361887Y (en) * | 1998-09-15 | 2000-02-02 | 蒋绍斌 | Electronic temp. control switch for electric fan |
| CN2539237Y (en) * | 2002-05-17 | 2003-03-05 | 徐泽湖 | Semiconductor character and its application demonstrator |
| CN101789196A (en) * | 2009-12-23 | 2010-07-28 | 盐城师范学院 | Automatic control switch circuit demonstration instrument |
| CN201820382U (en) * | 2010-07-23 | 2011-05-04 | 南京化工职业技术学院 | Thermistor characteristic demonstration instrument |
| CN204303228U (en) * | 2014-11-13 | 2015-04-29 | 盐城工业职业技术学院 | Thermistor characteristic and application experiment instrument |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104966444A (en) * | 2015-06-30 | 2015-10-07 | 盐城工业职业技术学院 | Thermo-sensitive sensor, photosensitive sensor, reed switch characteristic and application demonstration instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150225 |