CN204833844U - Thermistor operating characteristic demonstrates appearance - Google Patents
Thermistor operating characteristic demonstrates appearance Download PDFInfo
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- CN204833844U CN204833844U CN201520393302.XU CN201520393302U CN204833844U CN 204833844 U CN204833844 U CN 204833844U CN 201520393302 U CN201520393302 U CN 201520393302U CN 204833844 U CN204833844 U CN 204833844U
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- thermistor
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- operating characteristic
- cold water
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Abstract
The utility model relates to a teaching aid demonstration field, concretely relates to thermistor operating characteristic demonstrates appearance, including a rectangle plank, set up in proper order working power supply, power indication ware, thermistor, amplifier, demonstration ammeter that the electricity is connected on its characterized in that plank, still set up the container of take up cold water on the plank and can add hydrothermal container, its for the thermistor wire extension connect portablely arrive the cold water container, with hydrothermal container, the utility model discloses thermistor characteristic demonstration ware has simple structure, demonstrate directly perceivedly, can make student's understanding thermistor reduce along with its resistance value of rising of ambient temperature under certain operating voltage, performance that its resistance value of reduction of following ambient temperature increases.
Description
Technical field
The utility model relates to teaching aid demonstration field and is specifically related to a kind of thermistor operating characteristic demonstrator.
Background technology
Few at the instrument of rural school's demonstration at present, teacher's knowwhy outtalks to student, do not improve the enthusiasm of Students ' Learning, student loses interest in study, be weary of studying, coordinate teaching to make a kind of temperature control education demonstrator, excite students ' interest of study, make student like class of studying, improve the quality of teaching.
Summary of the invention
Coordinate teaching to make a kind of demonstration instrument for thermistor characteristics, excite students ' interest of study, make student like class of studying, improve the quality of teaching.
A kind of thermistor operating characteristic demonstrator, comprise a rectangle plank, it is characterized in that plank being arranged the working power, power indicator, thermistor, amplifier, the demonstration ammeter that are electrically connected successively, plank is also arranged the container of the container taking up cold water and energy heating water, its thermistor lengthens with wire and connects the container being movable to cold water vessels, heating water.
Preferably, a kind of thermistor operating characteristic demonstrator, is characterized in that described working power is miniature transformer step-down, diode rectification, electrochemical capacitor filtering, integrated three-terminal regulator voltage stabilizing four subelement composition.
Preferably, a kind of thermistor operating characteristic demonstrator, is characterized in that described thermistor is 20K Ω, and amplifier is two C9014 type compound compositions, and power indicator is red LED light emitting diode.
Accompanying drawing explanation
fig. 1a kind of thermistor operating characteristic of the utility model demonstrator operating diagram.
1-rectangle plank is marked in figure; 2-working power; 3-power indicator; 4-thermistor; 5-amplifier; 6-demonstration ammeter; 7-cold water vessels; 8-hot water tank.
Embodiment
A kind of thermistor operating characteristic demonstrator, comprise a rectangle plank (1), it is characterized in that plank being arranged the working power (2), power indicator (3), thermistor (4), amplifier (5), the demonstration ammeter (6) that are electrically connected successively, plank is also arranged the container (8) of the container (7) taking up cold water and energy heating water, its thermistor (4) lengthens with wire and connects the container (8) being movable to cold water vessels (7), heating water.
Working power (2) selects 2W to export the miniature transformer of 15V, rectifier is the rectifier that four 1N4002 diode bridge are formed by connecting, wave filter is the capacitor filter of 470 μ F/25V, voltage stabilizer model is 7812 three terminal regulators, thermistor (3) is 20K Ω, amplifier (5) is two C9014 triode compound compositions, common compact relay selected by relay, red color LED diode is power indicator (3), make wiring board, welding circuit, assembles, and source element is contained in box internal fixtion at plank upper plate.
The miniature transformer that principle of work: 2W exports 12V reduces 220V alternating voltage as 12V low-voltage AC, by four 1N4001 bridge rectifiers, the capacitor filtering of 220 μ F/25V, 7809 three terminal regulator voltage stabilizings export 12V galvanic current, after electronic component energising, the resistance size of thermistor changes by temperature controls, under certain operating voltage, temperature raises its resistance and reduces, temperature reduces its resistance and raises, its resistance change export voltage levels change, when temperature raises certain heat, the voltage exported is amplified by amplifier (two C9014 triode compound compositions), shown by large-scale pointer gauge.
During demonstration, turn on the power switch, thermistor is placed on cold water vessels, now demonstration ammeter pointer is close to 0 position, again it is put into the container of heating water, carry out water heating, demonstration ammeter pointer swings left (reduction), and the resistance of temperature-sensitive reduces, stop heating, demonstration ammeter moves right, and thermistor resistance increases, and takes out thermistor and it is put in the container of cold water, meter pointer gets back to centre position again, with ice cube close to thermistor, demonstration ammeter pointer moves right, and the resistance of thermistor increases.
The characteristic demonstrating device of the utility model thermistor, have structure simple, demonstrating visual, the characteristic that student gets information about general temperature-sensitive is, under certain operating voltage, thermistor reduces with its resistance value of rising of environment temperature, and its resistance value of reduction with environment temperature increases.
The utility model relates to teaching aid demonstration field and is specifically related to a kind of thermistor operating characteristic demonstrator, comprise a rectangle plank to it is characterized in that plank being arranged the working power, power indicator, thermistor, amplifier, the demonstration ammeter that are electrically connected successively, plank is also arranged the container of the container taking up cold water and energy heating water, its thermistor lengthens with wire and connects the container being movable to cold water vessels, heating water; The characteristic demonstrating device of the utility model thermistor, has structure simple, demonstrating visual, the understanding thermistor of student can be made to reduce with its resistance value of the rising of environment temperature under certain operating voltage, the performance that its resistance value of reduction with environment temperature increases.
Claims (3)
1. a thermistor operating characteristic demonstrator, comprise a rectangle plank (1), it is characterized in that plank being arranged the working power (2), power indicator (3), thermistor (4), amplifier (5), the demonstration ammeter (6) that are electrically connected successively, plank is also arranged the container (8) of the container (7) taking up cold water and energy heating water, its thermistor (4) lengthens with wire and connects the container (8) being movable to cold water vessels (7), heating water.
2. a kind of thermistor operating characteristic demonstrator as claimed in claim 1, it is characterized in that described working power (2) is miniature transformer step-down, diode rectification, electrochemical capacitor filtering, integrated three-terminal regulator voltage stabilizing four subelement composition.
3. a kind of thermistor operating characteristic demonstrator as claimed in claim 1, it is characterized in that described thermistor (4) is 20K Ω, amplifier (5) is two C9014 type compound compositions, power indicator (3) is red LED light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520393302.XU CN204833844U (en) | 2015-06-10 | 2015-06-10 | Thermistor operating characteristic demonstrates appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520393302.XU CN204833844U (en) | 2015-06-10 | 2015-06-10 | Thermistor operating characteristic demonstrates appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204833844U true CN204833844U (en) | 2015-12-02 |
Family
ID=54691417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520393302.XU Expired - Fee Related CN204833844U (en) | 2015-06-10 | 2015-06-10 | Thermistor operating characteristic demonstrates appearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204833844U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111890987A (en) * | 2020-06-28 | 2020-11-06 | 易事特集团(河南)有限公司 | Active damping device, battery parallel management system and battery parallel management method |
-
2015
- 2015-06-10 CN CN201520393302.XU patent/CN204833844U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111890987A (en) * | 2020-06-28 | 2020-11-06 | 易事特集团(河南)有限公司 | Active damping device, battery parallel management system and battery parallel management method |
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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: 20151202 Termination date: 20160610 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |