CN108280978A - A kind of photoelectric alarm design - Google Patents
A kind of photoelectric alarm design Download PDFInfo
- Publication number
- CN108280978A CN108280978A CN201710010769.5A CN201710010769A CN108280978A CN 108280978 A CN108280978 A CN 108280978A CN 201710010769 A CN201710010769 A CN 201710010769A CN 108280978 A CN108280978 A CN 108280978A
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- CN
- China
- Prior art keywords
- present
- photoelectric alarm
- alarm
- photoelectric
- optocoupler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
Abstract
The invention patent relates to a kind of design of photoelectric alarm, the present invention is converted into digital signaling system, digital display system, 555 alarm systems composition by electric signal；The present invention exports low and high level by illumination photo resistance and NPN triode co- controlling and shows that number is which road is kept off, while sending out intermittent alarm by 555 alarms to control 74LS48.
Description
Technical field
The invention patent relates to electronic design arts more particularly to a kind of photoelectric alarm to design.
Background technology
Photoelectric technology, Optoelectronics Technology are a sophisticated technologies for combining optics, electronics and motor, in early days due to technical threshold
Height lays particular stress on the development of national defence and space industry, and based on laser related application.In the recent decade, photoelectricity the relevant technologies are prominent flies
Push ahead vigorously, product category also continues to introduce new, and application is even more borderless, and level extends to communication, information, biochemistry, medical treatment, work
The fields such as industry, the energy, the people's livelihood.The future for looking forward to photoelectric alarm in lightweight, portability, low power consuming, high benefit, is integrated by force
Characteristic under, will be deeper into each industry application range.
Photovoltaic has become many focuses attracted attention because being widely used, recently no matter in communication network, multimedia messages
Change in the very powerful and exceedingly arrogant application field such as society, photovoltaic all plays important role, therefore many professional persons are pre-
It will be the century for belonging to " light " to see 21st century.For this purpose, no matter Japan and the United States, Ou Deng advanced countries or Asia-Pacific emerging nation all
The consistent good potentiality to opto-electronics, all place high hopes to photovoltaic market future growth potentiality, and actively put into opto-electronics
Development.Photoelectric alarm is exactly the outstanding person in numerous photovoltaics, it is simple with it, conveniently, the strong feature of flexibility allows more
More masses are benefited.With the progress of science and technology, photoelectric alarm valence gradually upgrades, can make after upgrading more people by
Benefit.
Patent of invention content
The invention patent relates to a kind of design of photoelectric alarm, the present invention is converted into digital signaling system by electric signal, and number is aobvious
Show system, 555 alarm systems composition；The present invention exports low and high level by illumination photo resistance and NPN triode co- controlling
Show that number is which road is kept off, while intermittent alarm is sent out by 555 alarms to control 74LS48.
Description of the drawings
Fig. 1：Photoelectric alarm block diagram.
Fig. 2：Fundamental diagram.
Fig. 3：Opto-electronic conversion figure.
Fig. 4：Multivibrator circuit figure.
Fig. 5：The linked, diagram of 74LS48 and common cathode charactron.
Specific implementation mode
In order to make the object, technical solution and advantage of patent of the present invention be more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated patent of the present invention.It should be appreciated that specific embodiment described herein is only used to explain
Patent of the present invention, is not intended to limit the present invention patent.
The invention patent relates to a kind of design of photoelectric alarm, the present invention is converted into digital signaling system by electric signal, number
Word display system, 555 alarm systems composition；The present invention passes through illumination photo resistance and NPN triode co- controlling output height
Level shows that number is which road is kept off, while intermittent alarm is sent out by 555 alarms to control 74LS48.Photoelectric alarm
Device block diagram is as shown in Figure 1.
Further, for photoelectric alarm principle as shown in Fig. 2, the left side in circuit is the first via, right side circuit is second
Road circuit, when two-way circuit is not all blocked, optocoupler is conducting, i.e., optocoupler upper end both end voltage is all low, so
Total voltage after 74LS32 or door is low afterwards, and low-voltage is connected with 555 pin 4, and RS so that 555 outputs are always
It is low, buzzer cannot be driven to ring, therefore will not jingle bell, while 1,7 feet in the low level signal and 74LS48 of optocoupler upper end are defeated
The signal entered, the signal of output are 0 by common cathode numeral method.After optocoupler, which has, to be wherein blocked all the way, the optocoupler that blocks
Cannot be short-circuit, in disconnecting, the point of two optocoupler upper ends is flat there are one being height, another is low, then passes through 74LS32 or door
Later total voltage is height, and high voltage is connected with 555 pin 4 so that 555 can work normally, and generate 1.58KHZ
（0.7*（R15+key）*C2）Rectangular pulse, make buzzer can jingle bell.The high and low level signal of optocoupler upper end with
The signal of 1,7 feet input in 74LS247, the signal of output are 1,2 by common cathode numeral method.When two-way optocoupler is all hidden
When gear, optocoupler will be all not turned on, and optocoupler is all height in cut-off state, i.e. optocoupler upper end both end voltage, is then passed through
74LS32 or the later total voltage of door are height, and low-voltage is connected with 555 pin 4 so that 555 export always as rectangle arteries and veins
Punching, driving buzzer are rung, therefore meeting jingle bell, while the letter of 1, the 7 feet input in the high level signal and 74LS48 of optocoupler upper end
Number, the signal of output is 3 by common cathode numeral method.
Further, opto-electronic conversion of the invention uses optocoupler, optocoupler interior by light emitting diode and photo resistance and NPN tri-
Pole pipe is constituted：Using 5V direct current supplys, to prevent optocoupler from burning out, it should in one 510 Ω resistance of Diode series.It is in the light simultaneously
Apparatus can use opaque paper, the low power light emitting diode running current in optocoupler 10mA~
Within the scope of 30mA, according to Ohm's law, by I=U/R, U=5V, 10mA<I<30mA, thus with the concatenated resistance of infrared light-emitting diode
Value be 510 Europe, photosensitive three pipes grade pipe to connect 240 ù resistance it is breakdown to prevent.Photoelectric switching circuit is as shown in Figure 3.
Further, the present invention constitutes the rectangular pulse that astatic multivibrator generates to control loudspeaker by 555 timers
Intermittent cry.According to T=0.7* (R12+2R13) * C1 can be determined the intermittent time for multivibrator, when conducting
Between be T1=0.7*（R12+R13）* C1, charging time T2=T-T1, can calculate turn-on time by circuit diagram 4 is：T=0.7*
（510K+2*20K）*330uF=1.235KHZ5.The function of 555 timers is mainly determined by two comparators.Two comparators
Output voltage control rest-set flip-flop and discharge tube state.Voltage is added between power supply and ground, it is when 5 feet are hanging, then electric
It is 2VCC/3 to press the voltage of the in-phase input end of comparator C1, and the voltage of the inverting input of C2 is VCC/3.If triggering input
The voltage of TR is held to be less than VCC/3, then the output of comparator C2 is 0, rest-set flip-flop can be made to set 1, make output end OUT=1.If threshold
The voltage for being worth input terminal TH is more than 2VCC/3, while the voltage at the ends TR is more than VCC/3, then the output of C1 is that the output of 0, C2 is
1, rest-set flip-flop can be set to 0, it is 0 level to make output.
Further, 7 sections of LEDS decoding pipes of display circuit of the invention selection 74LS48 and common cathode.Connection is as shown in Figure 5.
The foregoing is merely the preferred embodiments of patent of the present invention, are not intended to limit the invention patent, all at this
All any modification, equivalent and improvement etc., should be included in patent of the present invention made by within the spirit and principle of patent of invention
Protection domain within.
Claims (4)
1. the invention patent relates to a kind of design of photoelectric alarm, the present invention is converted into digital signaling system by electric signal, number
Display system, 555 alarm systems composition.
2. a kind of photoelectric alarm design according to claim 1, the present invention pass through illumination photo resistance and NPN triode
Co- controlling exports low and high level and shows that number is which road is kept off to control 74LS48.
3. a kind of photoelectric alarm design according to claim 1, opto-electronic conversion of the invention use optocoupler.
4. a kind of photoelectric alarm design according to claim 1, the present invention constitute Self-excitation Multi by 555 timers and shake
The rectangular pulse of device generation is swung to control the intermittent cry of loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010769.5A CN108280978A (en) | 2017-01-06 | 2017-01-06 | A kind of photoelectric alarm design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010769.5A CN108280978A (en) | 2017-01-06 | 2017-01-06 | A kind of photoelectric alarm design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108280978A true CN108280978A (en) | 2018-07-13 |
Family
ID=62800967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710010769.5A Pending CN108280978A (en) | 2017-01-06 | 2017-01-06 | A kind of photoelectric alarm design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108280978A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3706987A (en) * | 1971-08-23 | 1972-12-19 | Bay Alarm Co | Alarm loop circuit system with light-emitting current-detection means |
| US4242670A (en) * | 1979-03-02 | 1980-12-30 | Smith William V | Photosensitive alarm systems |
| US5005004A (en) * | 1988-10-21 | 1991-04-02 | Udofot Michael P | Light activated vehicle sensor with flashing light and pulsing sound alarm |
| CN2095447U (en) * | 1991-03-01 | 1992-02-05 | 徐哲民 | Multifunctional photoelectric signalling and calling arrangement |
| CN201247500Y (en) * | 2008-06-23 | 2009-05-27 | 陈鹏宇 | Anti-theft alarm device for intelligent money bag |
| CN203276564U (en) * | 2013-03-21 | 2013-11-06 | 赤峰学院 | Red light runner alarm device for pedestrian crossing road |
| CN204270448U (en) * | 2014-11-20 | 2015-04-15 | 西南交通大学 | A kind of simple type anti-theft warning circuit |
| CN104599420A (en) * | 2015-02-04 | 2015-05-06 | 成都市宏山科技有限公司 | Antitheft type light-operated circuit |
| CN204480421U (en) * | 2015-02-04 | 2015-07-15 | 成都市宏山科技有限公司 | Light-controlled antitheft warning circuit |
-
2017
- 2017-01-06 CN CN201710010769.5A patent/CN108280978A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3706987A (en) * | 1971-08-23 | 1972-12-19 | Bay Alarm Co | Alarm loop circuit system with light-emitting current-detection means |
| US4242670A (en) * | 1979-03-02 | 1980-12-30 | Smith William V | Photosensitive alarm systems |
| US5005004A (en) * | 1988-10-21 | 1991-04-02 | Udofot Michael P | Light activated vehicle sensor with flashing light and pulsing sound alarm |
| CN2095447U (en) * | 1991-03-01 | 1992-02-05 | 徐哲民 | Multifunctional photoelectric signalling and calling arrangement |
| CN201247500Y (en) * | 2008-06-23 | 2009-05-27 | 陈鹏宇 | Anti-theft alarm device for intelligent money bag |
| CN203276564U (en) * | 2013-03-21 | 2013-11-06 | 赤峰学院 | Red light runner alarm device for pedestrian crossing road |
| CN204270448U (en) * | 2014-11-20 | 2015-04-15 | 西南交通大学 | A kind of simple type anti-theft warning circuit |
| CN104599420A (en) * | 2015-02-04 | 2015-05-06 | 成都市宏山科技有限公司 | Antitheft type light-operated circuit |
| CN204480421U (en) * | 2015-02-04 | 2015-07-15 | 成都市宏山科技有限公司 | Light-controlled antitheft warning circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180713 |
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| WD01 | Invention patent application deemed withdrawn after publication |