CN203773577U - Optical light and dark stripe automatic counter - Google Patents
Optical light and dark stripe automatic counter Download PDFInfo
- Publication number
- CN203773577U CN203773577U CN201320888470.7U CN201320888470U CN203773577U CN 203773577 U CN203773577 U CN 203773577U CN 201320888470 U CN201320888470 U CN 201320888470U CN 203773577 U CN203773577 U CN 203773577U
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- triode
- voltage comparator
- counting
- signal processing
- automatic counter
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model discloses an optical light and dark stripe automatic counter which is simple in structure, low in cost, convenient to carry and operate, and capable of avoiding light influence in a testing environment and effectively enhancing counting accuracy and reliability. The optical light and dark stripe automatic counter is composed of a signal generator and a counting displayer (a signal processing circuit, a counting control circuit and a counting display circuit). The signal generator (the signal processing circuit) is provided with a voltage comparator U12 (U12A). The in-phase input end of the voltage comparator U12 (U12A) is connected with the emitting electrode of a triode Q1 and grounded via a resistor R6. The base electrode of the triode Q1 is connected with the collecting electrode via a photosensitive diode GD1 and then connected with working voltage Vdd. The anti-phase input end of the voltage comparator U12 (U12A) is connected with the emitting electrode of a triode Q2 and grounded via a variable resistor R7. The base electrode of the triode Q2 is connected with the collecting electrode via a photosensitive diode GD2 and then connected with the working voltage Vdd. The triodes Q1 and Q2 are identical in model number.
Description
Technical field
The utility model relates to a kind of optical experiment instrument, especially a kind of simple in structure, with low cost, be easy to carry, easy to operate, avoid test environment light impact, can effectively improve the optics light and shade stripe automatic counter of counting accuracy and reliability.
Background technology
In laboratory, the experiment of relevant interference and diffraction was all to count by eye-observation and to light and shade striped in the past, and there are the following problems:
1. because eyes are different to the sensitivity of light, easily produce larger counting error, affect the accuracy of experimental result;
2. waste time and energy, the progress of impact experiment;
3. laser instrument is mostly used in this type of experiment, and long-time observation causes eye fatigue.
China Patent No. is that 200920351743.8 utility model patent discloses a kind of optics light and shade stripe automatic counter, its signal processing circuit is to consist of a photodiode, triode and peripheral resistance, the anode of photodiode joins by resistance and power supply, the negative terminal of photodiode and the base stage of triode are joined, the grounded emitter of triode, the collector of triode is leaded up to resistance and power supply joins, the rectification circuit of separately leading up to joins with digit counter, and individual digit counter joins by ten digit counters and hundred digit counters; Individual digit counter shows that by individual display decoder and a position charactron joins, and ten digit counters join by ten display decoders and ten demonstration charactrons, and hundred digit counters join by hundred bit decoders and hundred demonstration charactrons.Set photodiode can automatic reception light and shade striped light intensity change, photodiode resistance from large to small, changes the voltage of transistor base, by triode, this change in voltage is amplified.Through amplification rectification, code conversion, be digital signal, finally by showing that charactron shows that striped, by secretly becoming bright number of times, has solved the existing problem of artificial counting.Although compare with artificial counting, have simple in structure, with low cost, be easy to carry, the advantage such as easy to operate, count results is accurate, but exist debugging trouble relatively, operating difficulties and be subject to extraneous natural light and disturb, therefore the precision of counting and reliability etc. all do not reach desirable effect.
Summary of the invention
The utility model is in order to solve the existing above-mentioned technical matters of prior art, provide a kind of simple in structure, with low cost, be easy to carry, easy to operate, avoid test environment light impact, can effectively improve the optics light and shade stripe automatic counter of counting accuracy and reliability.
Technical solution of the present utility model is: a kind of optics light and shade stripe automatic counter, by signal processing circuit, count control circuit and counting display circuit, formed, it is characterized in that: described signal processing circuit is provided with voltage comparator U12A, the emitter of the in-phase input end of voltage comparator U12A and triode Q1 joins and passes through resistance R 6 ground connection, and the base stage of triode Q1 is joined with operating voltage Vdd after joining by photodiode GD1 and collector; The emitter of the inverting input of voltage comparator U12A and triode Q2 joins and passes through variable resistor R7 ground connection, the base stage of triode Q2 is joined with operating voltage Vdd after joining by photodiode GD2 and collector, and the model of described triode Q1, Q2 is consistent.
The utility model compared with prior art, be provided with voltage comparator, in-phase input end and inverting input at voltage comparator are all provided with the optics light and shade striation circuit testing circuit consisting of photodiode, triode, resistance etc., first, make two photodiodes read the light intensity of half-light ring simultaneously, adjusting resistance values makes inverting input (reference edge) current potential a little more than in-phase input end (working end), then keep reference edge under the irradiation of half-light ring, with working end phototriode, read the variation of the ring of light.The electric signal of two photodiodes utilizes voltage comparator analysis after amplifying by triode, and when working end is input as Mingguang City's ring, voltage comparator can be exported a high level, on input count display, counts, shows.The advantages such as that the utility model not only has is like the prior art simple in structure, with low cost, be easy to carry, are changed and are counted by two different light intensity relatively, evade to a great extent the impact of extraneous natural light, and it is more accurate to count, and reliability is higher.Without counting under the condition in complete lucifuge, as long as the extraneous light intensity increasing and measurement light intensity sum are no more than the saturated light intensity of photodiode.And only need when powering on for the first time, debug, simple to operate, time saving and energy saving, convenient and swift.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model embodiment signal processing circuit.
Embodiment
As shown in Figure 1: the utility model consists of signal processing circuit, count control circuit and counting display circuit like the prior art, with prior art difference be that signal processing circuit is provided with voltage comparator U12A(LM393N), " 1 " pin of voltage comparator U12A is output terminal, join with the input end of count display, " 8 " pin and voltage vcc (5V) join, " 4 " pin ground connection, " 3 " pin, " 2 " pin are respectively in-phase input end and inverting input.The in-phase input end of voltage comparator U12A and triode Q1(2N3904) emitter join and pass through resistance R 6(1K Ω) ground connection, the base stage of triode Q1 by photodiode GD1 and collector, join after with operating voltage Vdd(12V) join; The inverting input of voltage comparator U12A and triode Q2(2N3904) emitter join and pass through variable resistor R7(50%, Key=A, MAX=2K Ω) ground connection, the base stage of triode Q2 is joined with operating voltage Vdd after joining by photodiode GD2 and collector.
The course of work:
While powering on for the first time, the magnitude of voltage U while successively reading in light and shade striped with working end
1, U
0, then adjust the divider resistance R7 of reference edge, normal voltage is set to U
i, U
igenerally also be larger than U
0and be less than U
1.Then keep reference edge under the irradiation of half-light ring, with working end phototriode, read the variation of the ring of light, start counting.
Claims (1)
1. an optics light and shade stripe automatic counter, by signal processing circuit, count control circuit and counting display circuit, formed, it is characterized in that: described signal processing circuit is provided with voltage comparator U12A, the emitter of the in-phase input end of voltage comparator U12A and triode Q1 joins and passes through resistance R 6 ground connection, and the base stage of triode Q1 is joined with operating voltage Vdd after joining by photodiode GD1 and collector; The emitter of the inverting input of voltage comparator U12A and triode Q2 joins and passes through variable resistor R7 ground connection, the base stage of triode Q2 is joined with operating voltage Vdd after joining by photodiode GD2 and collector, and the model of described triode Q1, Q2 is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888470.7U CN203773577U (en) | 2013-12-31 | 2013-12-31 | Optical light and dark stripe automatic counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888470.7U CN203773577U (en) | 2013-12-31 | 2013-12-31 | Optical light and dark stripe automatic counter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203773577U true CN203773577U (en) | 2014-08-13 |
Family
ID=51290740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320888470.7U Expired - Fee Related CN203773577U (en) | 2013-12-31 | 2013-12-31 | Optical light and dark stripe automatic counter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203773577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699931A (en) * | 2013-12-31 | 2014-04-02 | 大连海洋大学 | Automatic optical bright and dark stripe counter |
-
2013
- 2013-12-31 CN CN201320888470.7U patent/CN203773577U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699931A (en) * | 2013-12-31 | 2014-04-02 | 大连海洋大学 | Automatic optical bright and dark stripe counter |
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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: 20140813 Termination date: 20161231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |