CN208860939U - A kind of LED light output signal real-time monitoring system - Google Patents
A kind of LED light output signal real-time monitoring system Download PDFInfo
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- CN208860939U CN208860939U CN201820804608.3U CN201820804608U CN208860939U CN 208860939 U CN208860939 U CN 208860939U CN 201820804608 U CN201820804608 U CN 201820804608U CN 208860939 U CN208860939 U CN 208860939U
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Abstract
A kind of LED light output signal real-time monitoring system includes LED light emitting diode, power supply and the photoelectric sensor for converting the optical output signal of the LED light emitting diode incuded in real time to voltage signal, the signal input part of the photoelectric sensor connection controller, the controller is for amplifying the voltage signal that the photoelectric sensor exports, filtering, reference voltage compares, machine voltage value is exported after operation, the signal output end of the controller connects single-chip microcontroller, the single-chip microcontroller handles the machine voltage value for acquiring and converting, LED Real-Time Optical output valve is exported to display screen.The LED light output valve that LED light output signal real-time monitoring system provided by the utility model passes through observation display screen real-time display, ensure when the light output value of LED light source is lower than given threshold, the LED light source for light decay occur is replaced in time, real-time detection and show LED light source light output value scheme, microscope debug more intuitiveization.
Description
Technical field
The utility model relates to LED light output detection technique field more particularly to a kind of LED lights applied in microscope
The optical output signal real-time monitoring system in source.
Background technique
Light emitting diode (LED, Light Emitting Diode) lamp is without noxious material, environmental protection, service life length, light
The advantages such as electrical efficiency height are more and more widely used in lighting area.It is led for example, being applied to microscope light source technology
Domain, optical path auxiliary lamp of the microscope based on halogen lamp, will gradually be replaced by LED light source, as microscope uses duration, LED
Light source can slowly decay, and when LED light output is lower than some threshold value, will affect microscope sample view effect it is necessary in time more
Change LED light source.At present by artificially inferring threshold value of the LED lower than setting according to sample view effect, replacement LED light source is determined.
LED light source replacement Best Times are easily missed in this artificial deduction, so as to cause the LED light that light decay situation will cannot occur in time
Source replacement, influences microscopical using effect, wastes debug time and cost.
Utility model content
Artificially inferred LED light output not lower than the threshold technology scheme set according to sample view effect with existing
Together, the utility model provides a kind of LED light output signal real-time monitoring system in view of the above shortcomings of the prior art, solves
The light output value of LED light source in real-time monitoring microscope, is asked by the technology of the light output value of display screen real-time display LED light source
Topic.
The utility model in order to solve the above problem used by technical solution are as follows:
The utility model provides a kind of LED light output signal real-time monitoring system, including LED light emitting diode, is described
LED light emitting diode provides the power supply of constant current and converts the optical output signal of the LED light emitting diode incuded in real time
For the photoelectric sensor of voltage signal, the signal input part of the photoelectric sensor connection controller, the controller is used for will
The voltage signal of the photoelectric sensor output is amplified, is filtered, reference voltage compares, machine voltage value is exported after operation,
The signal output end of the controller connects single-chip microcontroller, and the single-chip microcontroller handles the machine voltage value for acquiring and converting,
LED Real-Time Optical output valve is exported to display screen.
Further, the LED light emitting diode and the photoelectric sensor are in closed space.
Further, the controller is equipped with signal amplification circuit, filter circuit and comparison circuit, and being respectively used to will be described
The voltage signal of photoelectric sensor output is amplified, is filtered and comparison operation.
Further, the comparison circuit is used for by filtered voltage signal compared with reference voltage signal, and output is stablized
Machine voltage value.
Further, the signal amplification circuit includes triode, the first pull-up resistor, the second pull-up resistor, third pull-up
Resistance and first capacitor, one end of the base stage connection first capacitor of the triode, the other end difference of the first capacitor
It is electrically connected one end of first pull-up resistor and one end of the photoelectric sensor, the other end of the photoelectric sensor connects
The emitter of triode, the emitter ground connection of triode are connect, the base stage of triode is also connected with one end of the second pull-up resistor, three poles
One end of the collector connection third pull-up resistor of pipe；The other end of the third pull-up resistor and first pull-up resistor
The other end, the second pull-up resistor other end and power electric connection.
Further, the filter circuit is RC filter circuit, including the second capacitor and the 4th resistance, one end of the second capacitor
Power supply, the other end ground connection of the second capacitor are connect, the emitter of the triode is also connected with one end of the 4th resistance, the 4th electricity
One end of the other end connection third capacitor of resistance, the collector of the other end connecting triode of third capacitor.
Further, the comparison circuit includes comparator, the 5th pull-up resistor and the 6th adjustable resistance, and comparator is just
To the connecting pin of input terminal connection third capacitor and the 4th resistance, the reverse input end of comparator connects the 5th pull-up resistor, and
Connect one end of the 6th adjustable resistance, the emitter of the other end connecting triode of the 6th adjustable resistance, the comparator it is defeated
The data that outlet connects single-chip microcontroller acquire positive terminal, and data acquire negative pole end ground connection, the data acquisition positive terminal and number of single-chip microcontroller
The 7th resistance and light emitting diode are serially connected with according between acquisition negative pole end.
The utility model has the beneficial effects that:
LED light output signal real-time monitoring system provided by the utility model by setting photoelectric sensor, controller,
The circuit connection structure of single-chip microcontroller realizes the light output value of LED light source in real-time monitoring microscope, and passes through display screen for LED
The light output value of light source carries out real-time display, by the LED light output valve for observing display screen real-time display, it is ensured that in LED light source
Light output value when being lower than given threshold, the LED light source for light decay occur is replaced in time, avoids influencing microscopical using effect
Fruit, also, real-time detection and show LED light source light output value scheme, microscope debug more intuitiveization, save debug time
And cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model LED light output signal real-time monitoring system；
Fig. 2 is the circuit diagram of the utility model LED light output signal real-time monitoring system.
In attached drawing, 1- power supply；2-LED light emitting diode；3- photoelectric sensor；4- controller；41- signal amplification circuit；
42- filter circuit；43- comparison circuit；5- single-chip microcontroller；6- display screen；Q1- triode；C1- first capacitor；R1- first pulls up electricity
Resistance；The second pull-up resistor of R2-；R3- third pull-up resistor；The second capacitor of C2-；The 4th resistance of R4-；The 5th pull-up resistor of R5-；
The 6th adjustable resistance of R6-；UA- comparator；5- single-chip microcontroller；The 7th resistance of R7-；D1- light emitting diode.
Specific embodiment
The embodiments of the present invention is specifically illustrated with reference to the accompanying drawing, and attached drawing is only for reference and illustrates use, not structure
The limitation of pairs of the utility model patent protection scope.
As shown in Figure 1, the present embodiment provides a kind of LED light output signal real-time monitoring system, including LED light emitting diode
2, for the LED light emitting diode 2 power supply 1 of constant current is provided and by the light output of the LED light emitting diode 2 incuded in real time
Signal is converted into the photoelectric sensor MK3 of voltage signal, and the photoelectric sensor 3 connects the signal input part of controller 4, described
Controller 4 exports operation electricity for amplifying, filtering by the voltage signal that the photoelectric sensor 3 exports, after comparison operation
Pressure value, the signal output end of the controller 4 connect single-chip microcontroller 5, and the single-chip microcontroller 5 handles the operation for acquiring and converting
Voltage value exports LED Real-Time Optical output valve to display screen 6.
As shown in Figure 1, LED light emitting diode 2 and photoelectric sensor 3 be in a closed space S, so that photoelectric transfer
Sensor 3 goes out photoinduction high sensitivity to LED light emitting diode 2, can real-time induction LED light emitting diode 2 not by external influence
Light out.
In the present embodiment, the controller 4 is equipped with signal amplification circuit 41, filter circuit 42 and comparison circuit 43, point
The voltage signal that the photoelectric sensor 3 exports Yong Yu not amplified, be filtered and comparison operation.Wherein, the comparison is electric
Road 43 is used for filtered voltage signal compared with reference voltage signal, exports stable machine voltage value.
As shown in Fig. 2, the signal amplification circuit 41 includes triode Q1, the first pull-up resistor R1, the second pull-up resistor
The base stage of R2, third pull-up resistor R3 and first capacitor C1, the triode Q1 connect one end of first capacitor C1, and described the
The other end of one capacitor C1 is electrically connected one end of the first pull-up resistor R1 and one end of the photoelectric sensor 3,
The emitter of the other end connecting triode Q1 of the photoelectric sensor 3, the emitter ground connection of triode Q1, the base of triode Q1
Pole is also connected with one end of the second pull-up resistor R2, one end of the collector connection third pull-up resistor R3 of triode Q1；Described
The other end of the other end of three pull-up resistor R3 and the first pull-up resistor R1, the second pull-up resistor R2 other end and
Power electric connection.
As shown in Fig. 2, the filter circuit 42 is RC filter circuit, including the second capacitor C2 and the 4th resistance R4, the
A termination power of two capacitor C2, the other end ground connection of the second capacitor C2, the emitter of the triode Q1 are also connected with described the
One end of four resistance R4, one end of the other end connection third capacitor C3 of the 4th resistance R4, the other end connection of third capacitor C3
The collector of triode Q1.
As shown in Fig. 2, the comparison circuit 43 includes comparator UA, the 5th pull-up resistor R5 and the 6th adjustable resistance
The connecting pin of positive input connection the third capacitor C3 and the 4th resistance R4 of R6, comparator UA, the reverse input end of comparator
The 5th pull-up resistor R5 is connected, and connects one end of the 6th adjustable resistance R6, the other end of the 6th adjustable resistance R6 connects three poles
The data of the emitter of pipe Q1, the output end connection single-chip microcontroller 5 of the comparator UA acquire positive terminal, and data acquire cathode termination
Ground is serially connected with the 7th resistance R7 and light emitting diode D1 between the data acquisition positive terminal and data acquisition negative pole end of single-chip microcontroller 5.
In the present embodiment, the preferred model LM358 of comparator UA, inside include two independent, high-gain, interior
The frequency compensated amplifier in portion has the advantages that high-gain, offset voltage influence are small.
The course of work of LED light output signal real-time monitoring system provided in this embodiment are as follows: photoelectric sensor 3 will be real-time
The optical output signal of the LED light emitting diode 2 of induction is converted into voltage signal, passes through the signal amplification circuit 41 in controller 4
The voltage signal amplification that photoelectric sensor 3 is exported, then RC filtering is carried out by filter circuit 42, to promote small voltage in circuit
Loss, reduce the test error of system, amplify the comparator UA that filtered voltage signal inputs to comparison circuit 43, pass through
Comparison circuit 43 will amplify, filtered voltage signal is compared with reference voltage value, and comparator UA exports machine voltage value, monolithic
Machine 5 acquires the machine voltage value of comparator UA output, then by the machine voltage value of acquisition and LED light source initial voltage, light output
Value carries out data reduction processing, shows LED Real-Time Optical output valve using display screen.
For example, the optical output signal of LED light emitting diode 2 has initial light output valve, and initial light output valve is logical
Cross the standard initial value of special equipment detection, for example, 100 lm(lumens: lumen), initial light output valve is through photoelectric transfer
By comparison circuit after sensor 3 is converted into voltage signal, voltage signal amplifies through signal amplification circuit 41, filter circuit 42 filters
43 compared with reference voltage value output machine voltage value be 10V.
100 lm of LED light outputting standard initial value, and the machine voltage value 10V of corresponding acquisition are set in 5 program of single-chip microcontroller,
By data processing in single-chip microcontroller 5, the LED Real-Time Optical output valve for being transferred to the display of display screen 6 is 100 lm；
When the initial optical output signal of LED changes, photoelectric sensor 3 acquires initial light output valve, the voltage after conversion
Value also changes, and by amplifying, filtering, the machine voltage value that comparator compares output can also change, at this moment single-chip microcontroller 5
The machine voltage value of acquisition can be compared with machine voltage value 10V corresponding with standard initial light output valve, and passes through 5 data of single-chip microcontroller
Conversion and internal data specially treated, export a Real-Time Optical output valve to float up and down in 100 lm of initial light output valve, example
Such as light output value of 105 lm or 95 lm, and Real-Time Optical output valve is transferred on display screen and is shown.In this way, really
It protects when the light output value of LED light source is lower than given threshold, the LED light source for light decay situation occur is replaced in time, avoids influencing
Microscopical using effect can also save debug time and cost.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (7)
1. a kind of LED light output signal real-time monitoring system, including LED light emitting diode, provide for the LED light emitting diode
The power supply of constant current and the photoelectric transfer for converting the optical output signal of the LED light emitting diode incuded in real time to voltage signal
Sensor, it is characterised in that: the signal input part of the photoelectric sensor connection controller, the controller are used for the photoelectricity
The voltage signal of sensor output is amplified, is filtered, reference voltage compares, machine voltage value, the control are exported after operation
The signal output end of device connects single-chip microcontroller, and the single-chip microcontroller handles the machine voltage value for acquiring and converting, to display screen
Export LED Real-Time Optical output valve.
2. LED light output signal real-time monitoring system according to claim 1, it is characterised in that: the LED light-emitting diodes
Pipe is with the photoelectric sensor in closed space.
3. LED light output signal real-time monitoring system according to claim 1, it is characterised in that: the controller is equipped with
Signal amplification circuit, filter circuit and comparison circuit are respectively used to the voltage signal for exporting photoelectric sensor progress
Amplification, filtering and comparison operation.
4. LED light output signal real-time monitoring system according to claim 3, it is characterised in that: the comparison circuit is used
In filtered voltage signal compared with reference voltage signal, to be exported to stable machine voltage value.
5. LED light output signal real-time monitoring system according to claim 3, it is characterised in that: the signal amplification electricity
Road includes triode, the first pull-up resistor, the second pull-up resistor, third pull-up resistor and first capacitor, the triode
Base stage connect first capacitor one end, the other end of the first capacitor be electrically connected one end of first pull-up resistor with
And one end of the photoelectric sensor, the emitter of the other end connecting triode of the photoelectric sensor, the transmitting of triode
Pole ground connection, the base stage of triode are also connected with one end of the second pull-up resistor, the collector connection third pull-up resistor of triode
One end；The other end of the third pull-up resistor and the other end, second pull-up resistor of first pull-up resistor are another
End and power electric connection.
6. LED light output signal real-time monitoring system according to claim 5, it is characterised in that: the filter circuit is
RC filter circuit, including the second capacitor and the 4th resistance, a termination power of the second capacitor, the other end ground connection of the second capacitor,
The emitter of the triode is also connected with one end of the 4th resistance, and the other end of the 4th resistance connects the one of third capacitor
End, the collector of the other end connecting triode of third capacitor.
7. LED light output signal real-time monitoring system according to claim 5, it is characterised in that: the comparison circuit packet
Include comparator, the 5th pull-up resistor and the 6th adjustable resistance, the positive input connection third capacitor and the 4th electricity of comparator
The connecting pin of resistance, the reverse input end of comparator connects the 5th pull-up resistor, and connects one end of the 6th adjustable resistance, and the 6th can
The emitter of the other end connecting triode of resistance is adjusted, the data of the output end connection single-chip microcontroller of the comparator acquire anode
End, data acquire negative pole end ground connection, are serially connected with the 7th electricity between the data acquisition positive terminal and data acquisition negative pole end of single-chip microcontroller
Resistance and light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804608.3U CN208860939U (en) | 2018-05-28 | 2018-05-28 | A kind of LED light output signal real-time monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804608.3U CN208860939U (en) | 2018-05-28 | 2018-05-28 | A kind of LED light output signal real-time monitoring system |
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| CN208860939U true CN208860939U (en) | 2019-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919144A (en) * | 2018-05-28 | 2018-11-30 | 广州市明美光电技术有限公司 | A kind of LED light output signal real-time monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919144A (en) * | 2018-05-28 | 2018-11-30 | 广州市明美光电技术有限公司 | A kind of LED light output signal real-time monitoring system |
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