CN201465403U - Photoelectric alarming demonstration teaching aid - Google Patents
Photoelectric alarming demonstration teaching aid Download PDFInfo
- Publication number
- CN201465403U CN201465403U CN2009200769051U CN200920076905U CN201465403U CN 201465403 U CN201465403 U CN 201465403U CN 2009200769051 U CN2009200769051 U CN 2009200769051U CN 200920076905 U CN200920076905 U CN 200920076905U CN 201465403 U CN201465403 U CN 201465403U
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- circuit
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- demonstration teaching
- teaching aid
- relay
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Abstract
The utility model discloses a photoelectric alarming demonstration teaching aid which comprises a light emitting device, a light control circuit and an alarming circuit, wherein the light control circuit comprises a light sending element, a resistor, a relay, an amplifier, a switch and a power supply, the light sending element is connected in series with the resistor so as to form a series circuit, the relay is connected in series with the amplifier and forms a parallel circuit by being connected in parallel with the series circuit, and the parallel circuit is connected in series with the power supply and the switch so as to form a loop. The utility model adopts little electronic element, is convenient to operate and revise, is conveniently demonstrated, has clear observation and is also convenient to carry about because of small volume.
Description
Technical field
The utility model relates to a kind of photoelectric alarm demonstration teaching aid that is used for teaching demonstration.
Background technology
The photoelectric alarm system is a kind of very important surveillance, and it is of a great variety, uses very extensive.But, at teaching field, to build circuit repeatedly and extremely bother, spended time is longer, is unsuitable for carrying out teaching demonstration, can't allow the student that the principle of photoelectric alarm system is had understanding and a understanding directly perceived, deep and clear-headed.
The utility model content
Technical problem to be solved in the utility model is: a kind of photoelectric alarm demonstration teaching aid is provided, can provides a good demonstration platform for building of photoelectric alarm system architecture and circuit.
For solving the problems of the technologies described above, the utility model adopts following technical scheme.
A kind of photoelectric alarm demonstration teaching aid, comprise luminescent device, light-operated circuit and warning circuit, wherein, described light-operated circuit comprises light sensitive component, resistance, relay, amplifier, switch and power supply, described light sensitive component is connected with resistance and is constituted series circuit, the series connection of described relay and amplifier, and with described series circuit formation in parallel parallel circuit, the described parallel circuit formation loop of connecting with power supply and switch.
As a kind of preferred version of the present utility model, described resistance comprises variable resistor.
As another kind of preferred version of the present utility model, described amplifier is made of two triodes, the base stage of first triode links to each other with variable resistor, collector links to each other with the base stage of second triode, the emission collection of first triode all links to each other with described relay with the emission collection of second triode, and the collector of second triode links to each other with described light sensitive component.
As another preferred version of the present utility model, described light sensitive component is photoresistance.
As another preferred version of the present utility model, described warning circuit comprises power supply, switch and sound-producing device, and described switch is in parallel with sound-producing device, and connects with power supply and to constitute the loop.
As another preferred version of the present utility model, described switch is the adhesive switch in the described relay.
As another preferred version of the present utility model, described luminescent device is a bulb.
The beneficial effects of the utility model are: the electronic component that the utility model adopts is less, is convenient to operation and modification, also is convenient to demonstration, makes observation more simultaneously, because of its volume is little, also is easy to carry.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the circuit diagram of light-operated circuit;
Fig. 2 is the circuit diagram of phonation circuit.
Embodiment
Embodiment
A kind of photoelectric alarm demonstration teaching aid, as shown in Figure 1, comprise luminescent device, light-operated circuit and warning circuit, wherein, described light-operated circuit comprises light sensitive component, resistance, relay, and amplifier, switch and power supply, described light sensitive component are connected with resistance and constituted series circuit, described relay and amplifier series connection, and with described series circuit formation in parallel parallel circuit, described parallel circuit is connected with power supply and switch and is constituted the loop. described relay is small-sized 3V relay, and described power supply is No. 5 batteries.
Described resistance comprises the 220K variable resistor.Described amplifier is made of two negative-positive-negative transistors, the base stage of first negative-positive-negative transistor links to each other with variable resistor, collector links to each other with the base stage of second negative-positive-negative transistor, the emission collection of first negative-positive-negative transistor all links to each other with described relay with the emission collection of second negative-positive-negative transistor, and the collector of second negative-positive-negative transistor links to each other with described light sensitive component.Described light sensitive component is photoresistance.
Described warning circuit is a music sounding circuit, as shown in Figure 2, comprises power supply, switch and sound-producing device, and described switch is in parallel with sound-producing device, and connects with power supply and to constitute the loop.Described switch is the adhesive switch in the described relay.Described luminescent device is a bulb.Described sound-producing device is a toy trumpet.
The method of work of present embodiment is: at first turn on the power switch energized, the light of bulb is aimed at photoresistance, the adhesive switch closure in the relay makes the toy trumpet short circuit, and this moment, musical sound stopped, and is ready; Cut light with hand or other things then, photoresistance has lost irradiate light, and it is big that resistance becomes, and electric current diminishes, and the adhesive switch in the relay disconnects, and toy trumpet has electric current to flow through, and sends warning; When bulb normally shone photoresistance, it is normal that electric current recovers, the adhesive switch closure in the relay, and chimes of doom stops.Powered-down switch after finishing using.
The electronic component that the utility model adopts is less, is convenient to operation and modification, also is convenient to demonstration, makes observation more simultaneously, because of its volume is little, also is easy to carry.
Here description of the present utility model and application are illustrative, are not to want with scope restriction of the present utility model in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present utility model or essential characteristic, and the utility model can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.
Claims (7)
1. photoelectric alarm demonstration teaching aid, comprise luminescent device, light-operated circuit and warning circuit, it is characterized in that: described light-operated circuit comprises light sensitive component, resistance, relay, amplifier, switch and power supply, described light sensitive component are connected with resistance and are constituted series circuit, described relay and amplifier series connection, and with described series circuit formation in parallel parallel circuit, described parallel circuit is connected with power supply and switch and is constituted the loop.
2. photoelectric alarm demonstration teaching aid according to claim 1 is characterized in that: described resistance comprises variable resistor.
3. photoelectric alarm demonstration teaching aid according to claim 2, it is characterized in that: described amplifier is made of two triodes, the base stage of first triode links to each other with variable resistor, collector links to each other with the base stage of second triode, the emission collection of first triode all links to each other with described relay with the emission collection of second triode, and the collector of second triode links to each other with described light sensitive component.
4. according to claim 1 or 3 described photoelectric alarm demonstration teaching aids, it is characterized in that: described light sensitive component is photoresistance.
5. photoelectric alarm demonstration teaching aid according to claim 1 is characterized in that: described warning circuit comprises power supply, switch and sound-producing device, and described switch is in parallel with sound-producing device, and connects with power supply and to constitute the loop.
6. photoelectric alarm demonstration teaching aid according to claim 5 is characterized in that: described switch is the adhesive switch in the described relay.
7. photoelectric alarm demonstration teaching aid according to claim 1 is characterized in that: described luminescent device is a bulb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200769051U CN201465403U (en) | 2009-06-25 | 2009-06-25 | Photoelectric alarming demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200769051U CN201465403U (en) | 2009-06-25 | 2009-06-25 | Photoelectric alarming demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465403U true CN201465403U (en) | 2010-05-12 |
Family
ID=42392751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200769051U Expired - Fee Related CN201465403U (en) | 2009-06-25 | 2009-06-25 | Photoelectric alarming demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201465403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111091744A (en) * | 2020-01-09 | 2020-05-01 | 北京中诚博睿教育科技有限公司 | Electronic photoinduction alarm clock intelligence-developing teaching aid for children |
-
2009
- 2009-06-25 CN CN2009200769051U patent/CN201465403U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111091744A (en) * | 2020-01-09 | 2020-05-01 | 北京中诚博睿教育科技有限公司 | Electronic photoinduction alarm clock intelligence-developing teaching aid for children |
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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: 20100512 Termination date: 20100625 |