CN201638437U - Teaching experimental instrument for conductivity of objects - Google Patents
Teaching experimental instrument for conductivity of objects Download PDFInfo
- Publication number
- CN201638437U CN201638437U CN2010201561871U CN201020156187U CN201638437U CN 201638437 U CN201638437 U CN 201638437U CN 2010201561871 U CN2010201561871 U CN 2010201561871U CN 201020156187 U CN201020156187 U CN 201020156187U CN 201638437 U CN201638437 U CN 201638437U
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- triode
- switch
- probes
- composite amplifier
- teaching
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Abstract
The utility model relates to a teaching experimental instrument for conductivity of objects, the structure of which is as follows: a base is respectively provided with a battery box, a bulb, a switch and two probes; a triode current amplifying circuit is arranged in the base; the triode current amplifying circuit is respectively and electrically connected with the bulb, the switch, the two probes and a contact electrode on the battery box. The teaching experimental instrument for conductivity of objects is safe, sensitive and accurate in use, can test the theory that objects such as human bodies, the earth, impure water and the like are also conductors, leads teachers to be capable of demonstrate relevant basic scientific knowledge safely, intuitively and accurately by experiments, meets the teaching requirement in classes of middle schools and primary schools, avoids cognitive disorder for students, and combines classroom teaching with experimental test.
Description
Technical field
The utility model relates to a kind of teaching and experiment equipment, specifically a kind of object conduction teaching experimental.
Background technology
In " conductor and insulator " class of primary school teaching, though students has been acquired the knowledge of " objects such as human body, the earth and unpurified water also are conductors ", but when utilizing existing teaching and experiment equipment to experimentize, really the small electric bulb in the experimental apparatus can not be lighted.Contrast on this cognition and the education experiment makes students very easily produce cognitive disorder, and it is very big passive also to cause for simultaneously teaching.
The utility model content
The purpose of this utility model just provides a kind of object conduction teaching experimental, thinks that classroom instruction provides visual and accurate laboratory facilities, realizes the unification of knowledge teaching and experimental check.
The utility model is achieved in that a kind of object conduction experiment instrument, battery case, small electric bulb, switch and two probes are housed respectively on pedestal, be provided with the triode current amplification circuit in pedestal, described triode current amplification circuit is electrically connected with contact electrode on described small electric bulb, switch, two probes and the battery case respectively.
When contacting high resistance human bodies such as human body, the earth or unpurified water or object respectively with two probes in this experiment instrument, also just provide a biasing resistor for the triode current amplification circuit in this experiment instrument, make the conducting of triode current amplification circuit, produce weak current, after this weak current amplifies through high power, just be enough to light the small electric bulb in the experiment instrument, thereby prove out the conclusion of " objects such as human body, the earth and unpurified water also are conductors ", realized the unification of classroom instruction and experimental check.
On described two probes, be respectively equipped with and connect guide line.Can extend probe contacts like this, make things convenient for experimental implementation.
Described triode current amplification circuit is to be connected into composite amplifier by at least two triode T1, T2, the collector parallel connection of each triode in the described composite amplifier, the base stage of the prime triode in the composite amplifier meets the first probe Z1, the second probe Z2 divides two-way, one the tunnel connects K switch, and another road connects collector sys node in the composite amplifier through small electric bulb L; The emitter of final stage triode T2 in the described composite amplifier of a termination of power supply E, another termination K switch of power supply E.
Described composite amplifier is by three compound connecting to form of triode.Can improve current amplification factor like this, improve the sensitivity of this experimental apparatus.
The utility model is safe in utilization, sensitive, accurate, make the teacher can demonstrate relevant background science knowledge safely, intuitively, exactly by experiment, satisfy needing badly of primary school and middle school teaching, avoided the generation of student's cognitive disorder, realized the unification of classroom instruction and experimental check.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, this experiment instrument is that battery case 6, small electric bulb 3, switch 4 and two probes 2 are housed respectively on pedestal 5, be provided with the triode current amplification circuit in pedestal 5, the triode current amplification circuit is electrically connected with contact electrode on small electric bulb 3, switch 4, two probes 2 and the battery case 6 respectively.On two probes 2, be respectively equipped with and connect guide line 1.
Described triode current amplification circuit as shown in Figure 2, be to be connected into three grades of composite amplifiers by at least three triodes (T1, T2, T3), the collector parallel connection of three triodes (T1, T2, T3) in the composite amplifier, the base stage of the prime triode T1 in the composite amplifier meet the first probe Z1; The second probe Z2 divides two-way, and one the tunnel connects K switch, and another road connects collector sys node in the composite amplifier through small electric bulb L.The emitter of final stage triode T2 in the termination composite amplifier of power supply E, another termination K switch of power supply E.
Claims (4)
1. object conduction teaching experimental, it is characterized in that on pedestal (5), being equipped with respectively battery case (6), small electric bulb (3), switch (4) and two probes (2), be provided with the triode current amplification circuit in pedestal (5), described triode current amplification circuit is electrically connected with contact electrode on described small electric bulb (3), switch (4), two probes (2) and the battery case (6) respectively.
2. object according to claim 1 conduction teaching experimental is characterized in that being respectively equipped with on described two probes (2) and connects guide line (1).
3. object conduction teaching experimental according to claim 1 and 2, it is characterized in that described triode current amplification circuit is to be connected into composite amplifier by at least two triodes (T1, T2), the collector parallel connection of each triode in the described composite amplifier, the base stage of the prime triode in the composite amplifier connects first probe (Z1), second probe (Z2) divides two-way, one the tunnel connects switch (K), and another road connects collector sys node in the composite amplifier through small electric bulb (L); The emitter of the final stage triode (T2) in the described composite amplifier of one termination of power supply (E), another termination switch (K) of power supply (E).
4. object conduction teaching experimental according to claim 3 is characterized in that described composite amplifier is by compound the connecting to form of three triodes (T1, T2, T3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201561871U CN201638437U (en) | 2010-04-13 | 2010-04-13 | Teaching experimental instrument for conductivity of objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201561871U CN201638437U (en) | 2010-04-13 | 2010-04-13 | Teaching experimental instrument for conductivity of objects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201638437U true CN201638437U (en) | 2010-11-17 |
Family
ID=43082942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201561871U Expired - Fee Related CN201638437U (en) | 2010-04-13 | 2010-04-13 | Teaching experimental instrument for conductivity of objects |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201638437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112967581A (en) * | 2021-03-05 | 2021-06-15 | 湖北第二师范学院 | Object conductivity detector and detection method |
-
2010
- 2010-04-13 CN CN2010201561871U patent/CN201638437U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112967581A (en) * | 2021-03-05 | 2021-06-15 | 湖北第二师范学院 | Object conductivity detector and detection method |
| CN112967581B (en) * | 2021-03-05 | 2024-05-17 | 湖北第二师范学院 | Object conductivity detector and detection method |
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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: 20101117 Termination date: 20120413 |