CN204926639U - Photoelectric effect experiment demonstration device - Google Patents
Photoelectric effect experiment demonstration device Download PDFInfo
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- CN204926639U CN204926639U CN201520725991.XU CN201520725991U CN204926639U CN 204926639 U CN204926639 U CN 204926639U CN 201520725991 U CN201520725991 U CN 201520725991U CN 204926639 U CN204926639 U CN 204926639U
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- row
- led
- teaching
- emitting diode
- photoelectric tube
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Abstract
The utility model relates to a photoelectric effect experiment demonstration device. Insert row, remove optical bench, LED emitting diode row, voltage sensor, little current sensor, data collection station, display including teaching photoelectron, lens hood, many round holes, it inserts row to contain round hole more than on the recess of the lens hood of teaching photoelectron, connect LED emitting diode row on removing the optical bench, contain the emitting diode of six kinds of different colours, voltage sensor, little current sensor connect data collection station, data collection station connects the display, the beneficial effects of the utility model are that: the light source adopts polygenetic emitting diode row for research vacuum phototube cathode material cutoff frequency, during the research light intemsity variation, remove and adopt the spout to change the distance between LED light source and the photoelectron, still adopt many round holes to insert row, can realize effectively shining area from 1S, 2S, 3S... 6S, the saturation current of the photoelectron under the area is shone to the determinable difference.
Description
Technical field
The present invention relates to Middle School Physics teaching aid field, be specifically related to a kind of photoelectric effect experiment apparatus for demonstrating.
Background technology
Current middle school physical experiment room lacks a kind of photoelectric effect experiment demonstrator, teachers' instruction generally adopts theory explaination, without lecture experiment, student is few for photoelectric effect experiment contact, and the applied research for photoelectricity knowledge is few, therefore makes a kind of vacuum photo tube application apparatus for demonstrating, research changes the various ways of incident intensity, introduce digitizing measuring apparatus voltage, electric current, for enriching student's knowwhy, training student manipulative ability and the ability of practice have reality and profound significance simultaneously.
Summary of the invention
A kind of photoelectric effect experiment apparatus for demonstrating, comprises base, teaching photoelectric tube, light shield, many circular holes insert row, mobile optical bench, LED LED row, voltage sensor, low current sensor, data acquisition unit, potentiometer, low-tension supply, display, USB connecting line, light shield, groove; Described base has installed teaching photoelectric tube, the light shield of described teaching photoelectric tube comprises a groove, transportable many circular holes insert row is comprised in described groove, for regulating the exposure intensity of incident light, it comprises six circular holes differed in size, area becomes arithmetic progression to increase, and is respectively 1S, 2S, 3S, 4S, 5S, 6S; Described base has been installed mobile optical bench, described mobile optical bench connects LED LED row, and described LED LED row comprises the light emitting diode of six kinds of different colours; Described teaching photoelectric tube connects potentiometer and low current sensor; Described voltage sensor is connected in parallel on the two ends of teaching photoelectric tube and low current sensor, for the voltage at MEASUREMENT TEACHING photoelectric tube two ends; Described voltage sensor, low current sensor connection data collector, described data acquisition unit connects display by USB connecting line; Described low-tension supply is connected with potentiometer, and is the DC low voltage power supply of 0 to 36V.
The model of described teaching photoelectric tube is CD – 28 vacuum photo tube.
The light emitting diode of described six kinds of different colours is respectively red, orange, yellow, green, blue, white LED luminary diode.
Described many circular holes insert row, wherein light is respectively 1S, 2S, 3S, 4S, 5S, 6S from effective irradiated area of circular hole, can select arbitrarily.
The invention has the beneficial effects as follows: (1) light source adopts red, orange, yellow, green, blue, white LED luminary diode row, move left and right LED LED row, change the frequency of incident light source, for studying teaching phototube cathode material cutoff frequency, filter sheet structure novelty is variegated, research wide frequency range than conventional incandescent.(2) when studying light intensity change, except the distance adopted between chute change LED light source and photoelectric tube, also adopt many circular holes insert row, irradiated area can be realized from 1S, 2S, 3S ... 6S is optional, move left and right many circular holes insert row, change the effective irradiated area of light source irradiation to teaching photoelectric tube, when light source is fixed, irradiation circular hole is fixed, the voltage be added on teaching photoelectric tube is changed by regulator potentiometer, can measure the saturation current of the photoelectric tube under different irradiated area, two kinds of modes reach the effect played the same tune on different musical instruments.(3) adopt voltage sensor to gather magnitude of voltage, adopt low current sensor to gather current value, accurately, efficiently, utilize digitizer, interface is more directly perceived, be convenient to fast recording dynamic I-U experimental data, draw experiment I-U image, comparative pedagogy photoelectric tube is for the difference of the I-U image of the LED light source of different color light; For degradation phenomenon under the aging photoelectric tube of research, sensitivity, there is the significance of reality.(4) adopt regulator potentiometer to control to be added in the voltage at teaching photoelectric tube two ends, be convenient to become more meticulous and measure electric current in vacuum; By measuring reverse Cut-off voltage, experiment is made more easily to measure photoelectronic maximum just kinetic energy.
Accompanying drawing explanation
Fig. 1 is one of structural drawing of the present invention;
Fig. 2 is structural drawing two of the present invention;
Fig. 3 is theory diagram of the present invention;
In figure, 1-base, 2-teaching photoelectric tube CD – 28,3-many circular holes insert row, 4-move optical bench, 5-LED LED row, 6-voltage sensor, 7-low current sensor, 8-data acquisition unit, 9-potentiometer, 10-low-tension supply, 11-display, 12-USB connecting line, 13-light shield, 14-groove.
Embodiment
As shown in Figure 1, Figure 2, Fig. 3, a kind of photoelectric effect experiment apparatus for demonstrating, comprises base 1, teaching photoelectric tube 2, many circular holes insert row 3, mobile optical bench 4, LED LED row 5, voltage sensor 6, low current sensor 7, data acquisition unit 8, potentiometer 9, low-tension supply 10, display 11, USB connecting line 12, light shield 13, groove 14; Described base 1 has installed teaching photoelectric tube 2, the light shield 13 of described teaching photoelectric tube 2 comprises a groove 14, transportable many circular holes insert row 3 is comprised in described groove 14, for regulating the exposure intensity of incident light, it comprises six circular holes differed in size, area becomes arithmetic progression to increase, and is respectively 1S, 2S, 3S, 4S, 5S, 6S; Described base 1 has been installed mobile optical bench 4, described mobile optical bench 4 connects LED LED row 5, and described LED LED row 5 comprises the light emitting diode of multiple different colours; Described teaching photoelectric tube 2 connects potentiometer 9 and low current sensor 7; Described voltage sensor 6 is connected in parallel on the two ends of teaching photoelectric tube 2 and low current sensor 7, for the voltage at MEASUREMENT TEACHING photoelectric tube 2 two ends; Described voltage sensor 6, low current sensor 7 connection data collector 8, described data acquisition unit 8 connects display 11 by USB connecting line 12; Described low-tension supply 10 is connected with potentiometer 9, and is DC low voltage power supply; The model of described teaching photoelectric tube 2 is CD – 28 vacuum photo tube; The light emitting diode of described six kinds of different colours is respectively red, orange, yellow, green, blue, white LED luminary diode; Described many circular holes insert row 3, wherein light is respectively 1S, 2S, 3S, 4S, 5S, 6S from effective irradiated area of circular hole, can select arbitrarily.
The invention has the beneficial effects as follows: (1) light source adopts red, orange, yellow, green, blue, white LED luminary diode row 5, move left and right LED LED row 5, change the frequency of incident light source, for studying teaching photoelectric tube 2 cathode material cutoff frequency, filter sheet structure novelty is variegated, research wide frequency range than conventional incandescent.(2) when studying light intensity change, except the distance adopted between chute change LED light source and photoelectric tube, also adopt many circular holes insert row 3, irradiated area can be realized from 1S, 2S, 3S ... 6S is optional, move left and right many circular holes insert row 3, change the effective irradiated area of light source irradiation to teaching photoelectric tube 2, when light source is fixed, irradiation circular hole is fixed, the voltage be added on teaching photoelectric tube 2 is changed by regulator potentiometer 9, can measure the saturation current of the photoelectric tube under different irradiated area, two kinds of modes reach the effect played the same tune on different musical instruments.(3) adopt voltage sensor 6 to gather magnitude of voltage, adopt low current sensor 7 to gather current value, accurately, efficiently, utilize digitizer, interface is more directly perceived, be convenient to fast recording dynamic I-U experimental data, draw experiment I-U image, comparative pedagogy photoelectric tube 2 is for the difference of the I-U image of the LED light source of different color light; For degradation phenomenon under the aging photoelectric tube of research, sensitivity, there is the significance of reality.(4) adopt regulator potentiometer 9 to control to be added in the voltage at teaching photoelectric tube 2 two ends, be convenient to become more meticulous and measure electric current in vacuum; By measuring reverse Cut-off voltage, experiment is made more easily to measure photoelectronic maximum just kinetic energy.
Claims (1)
1. a photoelectric effect experiment apparatus for demonstrating, comprises base (1), teaching photoelectric tube (2), many circular holes insert row (3), mobile optical bench (4), LED LED row (5), voltage sensor (6), low current sensor (7), data acquisition unit (8), potentiometer (9), low-tension supply (10), display (11), USB connecting line (12), light shield (13), groove (14); It is characterized in that: described base (1) has been installed teaching photoelectric tube (2), the light shield (13) of described teaching photoelectric tube (2) comprises a groove (14), transportable many circular holes insert row (3) is comprised in described groove (14), it comprises six circular holes differed in size, area becomes arithmetic progression to increase, and is respectively 1S, 2S, 3S, 4S, 5S, 6S; Described base (1) has installed mobile optical bench (4), described mobile optical bench (4) is upper connects LED LED row (5), described LED LED row (5) comprises the light emitting diode of six kinds of different colours, is respectively red, orange, yellow, green, blue, white LED luminary diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520725991.XU CN204926639U (en) | 2015-09-20 | 2015-09-20 | Photoelectric effect experiment demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520725991.XU CN204926639U (en) | 2015-09-20 | 2015-09-20 | Photoelectric effect experiment demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204926639U true CN204926639U (en) | 2015-12-30 |
Family
ID=54975748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520725991.XU Expired - Fee Related CN204926639U (en) | 2015-09-20 | 2015-09-20 | Photoelectric effect experiment demonstration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204926639U (en) |
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2015
- 2015-09-20 CN CN201520725991.XU patent/CN204926639U/en not_active Expired - Fee Related
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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: 20151230 Termination date: 20160920 |
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| CF01 | Termination of patent right due to non-payment of annual fee |