CN104991181B - A kind of intelligent LED differentiates instrument - Google Patents
A kind of intelligent LED differentiates instrument Download PDFInfo
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- CN104991181B CN104991181B CN201510353076.7A CN201510353076A CN104991181B CN 104991181 B CN104991181 B CN 104991181B CN 201510353076 A CN201510353076 A CN 201510353076A CN 104991181 B CN104991181 B CN 104991181B
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Abstract
The invention discloses a kind of intelligent LEDs to differentiate instrument, include two LED detection circuits, an amplifying circuit, a comparison circuit and an output circuit, described two LED detection circuits are connect with amplifying circuit, and amplifying circuit is connect with comparison circuit, and comparison circuit is connect with output circuit.The intelligent LED of the present invention differentiates instrument by detecting the forward bias voltage of LED light by amplification, then result is exported after being compared with predeterminated voltage so as to drive relay, control indicator light flickers, it is easy to operate in this way, and without staring at LED light for a long time, so as to avoid asthenopia, the testing result error rate that detection fatigue generates is reduced.
Description
Technical field
The present invention relates to a kind of differentiation instrument, particularly a kind of intelligent LED differentiates instrument.
Background technology
Light-emitting diode LED, is a kind of solid state semiconductor devices, and electricity directly can be converted into light by it.Daily life
In, we send out different colours light to represent that instrument and meter, electronic device are in different working conditions through commonly using LED.Such as：
Usually there are one except RJ-45 interfaces on end face, also 2 LED can be sent out green computer network interface connector respectively
Light and yellow light.Network interface card at work, can judge the working condition of network interface card by the color and flicker state of LED.It is made in production
It during making, checks whether LED installs correctly, is identified typically only by the eyes of worker, and work for a long time, often
Visual fatigue can be generated, erroneous judgement is generated, so as to produce bad products.In order in whether correct, the reduction convenient for detection LED installations
Labor intensity needs a kind of intelligent LED to differentiate instrument.
Invention content
The technical problems to be solved by the invention are to provide a kind of intelligent LED and differentiate instrument, he can automatic identification LED whether
Installation is correct.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of intelligent LED differentiates instrument, it is characterised in that：Include two LED detection circuits, an amplifying circuit, a ratio
Compared with circuit and an output circuit, described two LED detection circuits are connect with amplifying circuit, and amplifying circuit connects with comparison circuit
It connects, comparison circuit is connect with output circuit.
Further, the LED detection circuits include LM317A chips, LM317B chips, four filter capacitor C1, C2,
C3, C4, two adjustable resistances RP1, RP2 and two LED light D1, D2 to be measured, 3 feet and power supply VCC0 and the filtering of LM317A chips
One end connection of capacitance C2, the other end ground connection of filter capacitor C2,2 feet of LM317A chips and one end of adjustable resistance RP1 and
The 1 of one end connection of filter capacitor C1, the other end of adjustable resistance RP1 and another termination LM317A chips of filter capacitor C1
Foot, LED light D1 cathode ground connection to be measured, anode meet 1 foot of LM317A chips and leading-out terminal output forward bias voltage V0A；
3 feet of LM317B chips are connect with one end of power supply VCC0 and filter capacitor C4, the other end ground connection of filter capacitor C4, LM317B
2 feet of chip are connect with one end of one end of adjustable resistance RP2 and filter capacitor C3, the other end of adjustable resistance RP2 and filtering
1 foot of another termination LM317B chips of capacitance C3, LED light D2 cathode to be measured ground connection, anode connect 1 foot of LM317B chips and
Leading-out terminal output forward bias voltage V1A.
Further, the amplifying circuit includes LM358 chips, resistance R1, R3 and adjustable resistance RP5, RP6, resistance R1
1 foot of one termination LM358 chips, 2 feet of another termination LM358 chips of resistance R1, adjustable resistance RP5 mono- terminate LM358 chips
2 feet, adjustable resistance RP5 other ends ground connection, 4 feet that 3 feet of LM358 chips connect forward bias voltage V0A, LM358 chip connect
Ground, 5 feet of 1 foot leading-out terminal output amplification voltage signal V0B, the LM358 chip of LM358 chips meet forward bias voltage V1A,
Adjustable resistance RP6 mono- terminates 6 feet of LM358 chips, adjustable resistance RP6 other ends ground connection, and resistance R3 mono- terminates LM358 chips
7 feet, 6 feet of another termination LM358 chips of resistance R3,8 feet of LM358 chips connect the 7 feet extraction of power supply VCC0, LM358 chip
Terminal output amplification voltage signal V1B.
Further, the comparison circuit includes LM339 chips, resistance R5, R6, R7, R8, R9, R10 and adjustable resistance
RP4, RP3, the output of 2 foot leading-out terminals the comparison result V0C, resistance R7 mono- termination power VCC0, resistance R7 of LM339 chips are another
2 feet of LM339 chips are terminated, 3 feet of LM339 chips meet 4 foot connecting resistance R6 one end of power supply VCC0, LM339 chip, resistance R6
The other end is connect with resistance R5 one end and adjustable resistance RP4 one end, resistance R5 other ends ground connection, another terminations of adjustable resistance RP4
5 feet of power supply VCC0, LM339 chip connect the 14 foot leading-out terminals output comparison result of amplification voltage signal V0B, LM339 chip
14 feet of another termination LM339 chips of V1C, resistance R10 mono- termination power VCC0, resistance R10, the 12 feet ground connection of LM339 chips,
9 feet of LM339 chips connect 8 foot connecting resistance R9 one end of amplification voltage signal V1B, LM339 chip, the resistance R9 other ends and resistance
R8 one end is connected with adjustable resistance RP3 one end, resistance R8 other ends ground connection, another termination power VCC0 of adjustable resistance RP3.
Further, the output circuit includes the 7 feet ground connection of 74LS32 chips and relay KA, 74LS32 chip,
10 feet that 14 feet of 74LS32 chips connect power supply VCC0,74LS32 chip connect 9 feet of comparison result V0C, 74LS32 chip and connect ratio
Compared with result V1C, 8 feet of 74LS32 chips are connect with relay KA one end, relay KA another termination power VCC0, relay KA
Normally opened contact 2 is grounded, and relay KA normally opened contacts 1 connect indicator light cathode, and indicator light anode meets power supply VCC0.
Compared with prior art, the present invention haing the following advantages and effect：Intelligent LED differentiates instrument using LED in positive electricity
The characteristic that forward bias voltage is different under same case is flowed, comparator is utilized after the forward bias voltage amplification that LED light is generated
The voltage of gained compared with predeterminated voltage, to malfunction by the result phase of two LED light or, when there are one LED light, indicator light is bright,
Error is reminded, is seen in this way without staring at the LED light of flicker always, so as to avoid eye fatigue, ensure that the efficiency and effect of test
Fruit reduces the error rate of detection.
Description of the drawings
Fig. 1 is that a kind of intelligent LED of the present invention differentiates the schematic diagram of instrument.
Fig. 2 is that a kind of intelligent LED of the present invention differentiates the detection circuit schematic diagram of instrument.
Fig. 3 is that a kind of intelligent LED of the present invention differentiates the amplifying circuit schematic diagram of instrument.
Fig. 4 is that a kind of intelligent LED of the present invention differentiates the comparison circuit schematic diagram of instrument.
Fig. 5 is that a kind of intelligent LED of the present invention differentiates the output circuit schematic diagram of instrument.
Specific embodiment
Below in conjunction with the accompanying drawings and pass through embodiment the present invention is described in further detail, following embodiment is to this hair
Bright explanation and the invention is not limited in following embodiments.
As shown in the figure, a kind of intelligent LED of the present invention differentiates that instrument includes two LED detection circuits, amplifying circuit, one
A comparison circuit and an output circuit, two LED detection circuits are connect with amplifying circuit, and amplifying circuit connects with comparison circuit
It connects, comparison circuit is connect with output circuit.
LED detection circuits include LM317A chips, LM317B chips, four filter capacitor C1, C2, C3, C4, two it is adjustable
Resistance RP1, RP2 and two LED light D1, D2 to be measured, 3 feet of LM317A chips connect with one end of power supply VCC0 and filter capacitor C2
It connects, the other end of filter capacitor C2 ground connection, the one of 2 feet of LM317A chips and one end of adjustable resistance RP1 and filter capacitor C1
1 foot of end connection, the other end of adjustable resistance RP1 and another termination LM317A chips of filter capacitor C1, LED light D1 to be measured are born
Pole is grounded, and anode meets 1 foot of LM317A chips and leading-out terminal output forward bias voltage V0A；3 feet of LM317B chips with
Power supply VCC0 is connected with one end of filter capacitor C4, the other end ground connection of filter capacitor C4,2 feet and adjustable electric of LM317B chips
One end of resistance RP2 is connected with one end of filter capacitor C3, the other end of adjustable resistance RP2 and another termination of filter capacitor C3
1 foot of LM317B chips, LED light D2 cathode ground connection to be measured, anode connects 1 foot of LM317B chips and leading-out terminal output is positive
Bias voltage V1A.
Amplifying circuit includes LM358 chips, resistance R1, R3 and adjustable resistance RP5, RP6, and resistance R1 mono- terminates LM358 cores
1 foot of piece, 2 feet of another termination LM358 chips of resistance R1, adjustable resistance RP5 mono- terminate 2 feet of LM358 chips, adjustable resistance
The RP5 other ends are grounded, and 3 feet of LM358 chips connect the 4 feet ground connection of forward bias voltage V0A, LM358 chip, and the 1 of LM358 chips
5 feet of foot leading-out terminal output amplification voltage signal V0B, LM358 chip connect forward bias voltage V1A, adjustable resistance RP6 one end
6 feet of LM358 chips, adjustable resistance RP6 other ends ground connection are connect, resistance R3 mono- terminates 7 feet of LM358 chips, and resistance R3 is another
6 feet of LM358 chips are terminated, 8 feet of LM358 chips connect the 7 foot leading-out terminals output amplification electricity of power supply VCC0, LM358 chip
Press signal V1B.
Comparison circuit includes LM339 chips, resistance R5, R6, R7, R8, R9, R10 and adjustable resistance RP4, RP3, LM339 cores
Another termination LM339 chips of the output of 2 foot leading-out terminals comparison result V0C, resistance R7 mono- termination power VCC0, resistance R7 of piece
2 feet, 3 feet of LM339 chips meet 4 foot connecting resistance R6 one end of power supply VCC0, LM339 chip, the resistance R6 other ends and resistance R5
One end is connected with adjustable resistance RP4 one end, resistance R5 other ends ground connection, adjustable resistance RP4 another termination power VCC0, LM339
5 feet of chip connect the 14 foot leading-out terminals output comparison result V1C of amplification voltage signal V0B, LM339 chip, resistance R10 one end
Connect power supply VCC0,14 feet of another termination LM339 chips of resistance R10, the 12 feet ground connection of LM339 chips, 9 feet of LM339 chips
Connect 8 foot connecting resistance R9 one end of amplification voltage signal V1B, LM339 chip, the resistance R9 other ends and resistance R8 one end and adjustable electric
Hinder the connection of RP3 one end, resistance R8 other ends ground connection, another termination power VCC0 of adjustable resistance RP3.
Output circuit includes the 7 feet ground connection of 74LS32 chips and relay KA, 74LS32 chip, 14 feet of 74LS32 chips
10 feet for connecing power supply VCC0,74LS32 chip connect 9 feet of comparison result V0C, 74LS32 chip and meet comparison result V1C, 74LS32
8 feet of chip are connect with relay KA one end, and another termination power VCC0 of relay KA, relay KA normally opened contacts 2 are grounded, after
Electric appliance KA normally opened contacts 1 connect indicator light cathode, and indicator light anode meets power supply VCC0.
By the C-V characteristic of diode, it is understood that the LED of different colours is in the case where forward current is identical, it is positive
Bias voltage is different.Using this characteristic, we provide constant electric current using constant-current source to yellow led and green LED, different
LED will generate different forward bias voltages.Measured forward bias voltage is amplified, using comparator being surveyed
The voltage obtained is compared with preset voltage range, then one LED of result of the comparison phase or, any of which is malfunctioned,
Relay output will be controlled, the normally opened contact of relay is closed, and indicator light is bright；Normally-closed contact switches on and off, Ke Yiwei
Peripheral equipment provides signal, and peripheral equipment is driven to work in different ways.
Described in this specification above content is only illustrations made for the present invention.Technology belonging to the present invention
The technical staff in field can do described specific embodiment various modifications or additions or in a similar way
It substitutes, content without departing from description of the invention or surmounts range defined in the claims, this should all be belonged to
The protection domain of invention.
Claims (3)
1. a kind of intelligent LED differentiates instrument, it is characterised in that：Include two LED detection circuits, an amplifying circuit, a comparison
Circuit and an output circuit, described two LED detection circuits are connect with amplifying circuit, and amplifying circuit is connect with comparison circuit,
Comparison circuit is connect with output circuit；The result of two LED detection circuits two-way independent in same amplifying circuit is divided
Not Fang great, by two amplify control sources to same comparison circuit in by independent two-way respectively with respective reference voltage into
Row is relatively, by two comparison result phases or obtain single output result；
The LED detection circuits include LM317A chips, LM317B chips, four filter capacitor C1, C2, C3, C4, two it is adjustable
Resistance RP1, RP2 and two LED light D1, D2 to be measured, 3 feet of LM317A chips connect with one end of power supply VCC0 and filter capacitor C2
It connects, the other end of filter capacitor C2 ground connection, the one of 2 feet of LM317A chips and one end of adjustable resistance RP1 and filter capacitor C1
1 foot of end connection, the other end of adjustable resistance RP1 and another termination LM317A chips of filter capacitor C1, LED light D1 to be measured are born
Pole is grounded, and anode meets 1 foot of LM317A chips and leading-out terminal output forward bias voltage V0A；3 feet of LM317B chips with
Power supply VCC0 is connected with one end of filter capacitor C4, the other end ground connection of filter capacitor C4,2 feet and adjustable electric of LM317B chips
One end of resistance RP2 is connected with one end of filter capacitor C3, the other end of adjustable resistance RP2 and another termination of filter capacitor C3
1 foot of LM317B chips, LED light D2 cathode ground connection to be measured, anode connects 1 foot of LM317B chips and leading-out terminal output is positive
Bias voltage V1A；
The amplifying circuit includes LM358 chips, resistance R1, R3 and adjustable resistance RP5, RP6, and resistance R1 mono- terminates LM358 cores
1 foot of piece, 2 feet of another termination LM358 chips of resistance R1, adjustable resistance RP5 mono- terminate 2 feet of LM358 chips, adjustable resistance
The RP5 other ends are grounded, and 3 feet of LM358 chips connect the 4 feet ground connection of forward bias voltage V0A, LM358 chip, and the 1 of LM358 chips
5 feet of foot leading-out terminal output amplification voltage signal V0B, LM358 chip connect forward bias voltage V1A, adjustable resistance RP6 one end
6 feet of LM358 chips, adjustable resistance RP6 other ends ground connection are connect, resistance R3 mono- terminates 7 feet of LM358 chips, and resistance R3 is another
6 feet of LM358 chips are terminated, 8 feet of LM358 chips connect the 7 foot leading-out terminals output amplification electricity of power supply VCC0, LM358 chip
Press signal V1B.
2. a kind of intelligent LED described in accordance with the claim 1 differentiates instrument, it is characterised in that：The comparison circuit includes LM339 cores
Piece, resistance R5, R6, R7, R8, R9, R10 and adjustable resistance RP4, RP3, the 2 foot leading-out terminals output comparison result of LM339 chips
2 feet of another termination LM339 chips of V0C, resistance R7 mono- termination power VCC0, resistance R7,3 feet of LM339 chips connect power supply
4 foot connecting resistance R6 one end of VCC0, LM339 chip, the resistance R6 other ends connect with resistance R5 one end and adjustable resistance RP4 one end
It connects, resistance R5 other ends ground connection, another termination power VCC0 of adjustable resistance RP4,5 feet of LM339 chips connect amplification voltage signal
The output of 14 foot leading-out terminals the comparison result V1C, resistance R10 mono- termination power VCC0, resistance R10 of V0B, LM339 chip are another
14 feet of LM339 chips, the 12 feet ground connection of LM339 chips are terminated, 9 feet of LM339 chips meet amplification voltage signal V1B, LM339
8 foot connecting resistance R9 one end of chip, the resistance R9 other ends are connect with resistance R8 one end and adjustable resistance RP3 one end, and resistance R8 is another
One end is grounded, another termination power VCC0 of adjustable resistance RP3.
3. a kind of intelligent LED described in accordance with the claim 1 differentiates instrument, it is characterised in that：The output circuit includes 74LS32
7 feet of chip and relay KA, 74LS32 chip are grounded, and 14 feet of 74LS32 chips connect the 10 of power supply VCC0,74LS32 chip
9 feet that foot connects comparison result V0C, 74LS32 chip meet 8 feet of comparison result V1C, 74LS32 chip and relay KA one end company
It connects, another termination power VCC0 of relay KA, relay KA normally opened contacts 2 are grounded, and relay KA normally opened contacts 1 connect indicator light and bear
Pole, indicator light anode meet power supply VCC0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510353076.7A CN104991181B (en) | 2015-06-24 | 2015-06-24 | A kind of intelligent LED differentiates instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510353076.7A CN104991181B (en) | 2015-06-24 | 2015-06-24 | A kind of intelligent LED differentiates instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104991181A CN104991181A (en) | 2015-10-21 |
| CN104991181B true CN104991181B (en) | 2018-06-19 |
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| CN201510353076.7A Expired - Fee Related CN104991181B (en) | 2015-06-24 | 2015-06-24 | A kind of intelligent LED differentiates instrument |
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| CN202994636U (en) * | 2012-08-20 | 2013-06-12 | 中国科学院宁波材料技术与工程研究所 | Middle/high-temperature infrared emissivity testing device |
| CN103364707A (en) * | 2013-08-05 | 2013-10-23 | 莆田学院 | High-power LED (light-emitting diode) chip packaging quality detecting method |
| CN204789903U (en) * | 2015-06-24 | 2015-11-18 | 南京铁道职业技术学院 | Intelligence LED differentiates appearance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2296436B1 (en) * | 2009-09-07 | 2018-11-14 | Nxp B.V. | System and method for output flux measurement of a light emitting diode |
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2015
- 2015-06-24 CN CN201510353076.7A patent/CN104991181B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| CN1536544A (en) * | 2003-04-03 | 2004-10-13 | ������������ʽ���� | Image display and drive circuit device of light emitting diode and fault detection method |
| CN101669405A (en) * | 2007-04-27 | 2010-03-10 | 皇家飞利浦电子股份有限公司 | Led outage detection circuit |
| CN202994636U (en) * | 2012-08-20 | 2013-06-12 | 中国科学院宁波材料技术与工程研究所 | Middle/high-temperature infrared emissivity testing device |
| CN103364707A (en) * | 2013-08-05 | 2013-10-23 | 莆田学院 | High-power LED (light-emitting diode) chip packaging quality detecting method |
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| CN104991181A (en) | 2015-10-21 |
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