CN205491330U - LED life -span is detected and invariable illuminance control system - Google Patents

Abstract

The utility model proposes a LED life detection and constant illuminance control system, including an LED lamp, the LED lamp is connected to an AC power supply through an LED driver, the LED lamp and the LED driver are connected with an LED lamp illuminance control device, and the LED The lamp illuminance control device includes an illuminance collection system, the illuminance collection system is connected to a control system, the control system is connected to a dimming signal system, the LED lamp is connected to the illuminance collection system, and the LED driver is connected to the dimming signal system, The control system is connected with an indicating system, and the utility model can detect the lifespan of the LED lamp, and control the LED to be in a constant illuminance, prolonging the lifespan of the LED lamp.

Description

A LED life detection and constant illumination control system

technical field

The utility model belongs to the technical field of lighting, in particular to an LED life detection and constant illuminance control system.

Background technique

At present, in the current lighting industry, LED is developing rapidly due to its superior characteristics such as high energy saving, long life, multiple conversions, environmental protection, and high-tech, and it has the potential to replace traditional lighting. However, LED lamps generally have the problem of light attenuation that reduces brightness after long-term use, which affects normal use; and due to the instability of LED lamps during long-term operation, the life of LED lamps is reduced.

Therefore, there is an urgent need for a LED life detection and constant illuminance control system, which can detect the life of the LED lamp, and control the LED at a constant illuminance to prolong the life of the LED lamp.

Utility model content

The utility model provides an LED life detection and constant illuminance control system, which solves the problems in the prior art.

The technical scheme of the utility model is realized in the following way: a LED lamp life detection and constant illumination control system, including an LED lamp, the LED lamp is connected to an AC power supply through an LED driver, and the LED lamp and the LED driver are connected to an LED lamp An illuminance control device, the LED lamp illuminance control device includes an illuminance collection system, the illuminance collection system is connected to a control system, the control system is connected to a dimming signal system, the LED lamp is connected to the illuminance collection system, and the LED The driver is connected with a dimming signal system, and the control system is connected with an indicating system.

As a preferred implementation, when the power is first turned on, the illuminance acquisition system collects the illuminance of the LED lamp for the first preset time, and the control system uses the median value average filter algorithm and the lag filter algorithm to perform calculations according to the collected data. , as the reference illuminance of the LED lamp, stored in the storage unit of the control system.

As a preferred embodiment, when powering on for the first time, if the time for collecting illuminance by the illuminance collection system is less than the first preset time, then when powering up next time, the illuminance of the LED lamp will be collected again, and the collection time will meet the first preset time At the time, the control system uses the median average filter algorithm and the lag filter algorithm to perform calculations based on the collected data, and stores them in the storage unit of the control system as the reference illuminance of the LED lamp.

As a preferred implementation, the illuminance collection system continuously collects the illuminance of the LED lamp and compares it with the reference illuminance of the storage unit of the control system. When the real-time illuminance value is less than the reference illuminance within the second preset time range, it is determined that LED lamps have reached the end of their life.

As a preferred implementation manner, when it is determined that the life of the LED lamp is over, the indicating system gives an indication to remind the user to replace the LED lamp.

As a preferred implementation manner, the control system controls the output of the dimming signal system, controls the driving of the LED, and drives the LED lamp to work within a preset power ratio range.

As a preferred embodiment, the LED driver outputs a first preset power in a specific proportion to the rated power of the LED lamp, and the control system controls the output of the dimming signal system to control the LED driver to drive the LED lamp less than the first preset power.

As a preferred embodiment, the control system compares the illuminance of the LED lights collected in real time by the illuminance collection system with the reference illuminance, and controls the dimming signal system to output a dimming signal according to the comparison result, thereby driving the The illuminance value of the above-mentioned LED light is greater than the preset value.

As a preferred embodiment, when the illuminance of the LED lights collected by the acquisition system in real time is less than the first preset ratio of the reference illuminance, the control system controls the dimming signal system to increase the output of the dimming signal and increase the output current of the LED dimming drive, Therefore, the brightness of the LED lamp is increased until the real-time illuminance of the LED lamp is greater than the third preset ratio of the reference illuminance within the third preset time.

As a preferred implementation manner, the LED driver transmits a POWER signal to a dimming signal system, and the dimming signal system drives the LED driver through a DIM signal, thereby completing the adjustment of the illuminance of the LED lamp.

After adopting the above-mentioned technical scheme, the beneficial effect of the utility model is: the LED lamp life detection and constant illuminance control system can preset the reference illuminance of the LED lamp, and detect the real-time illuminance of the LED lamp, and carry out according to the real-time illuminance and the reference illuminance. In comparison, the dimming signal system can be used to adjust the LED drive, thereby changing the illuminance of the LED light, making the LED light within the preset illuminance range, ensuring the normal light emission of the LED light, and prolonging the service life of the LED light; When the illuminance of the LED lamp is lower than the preset illuminance value for a period of time, it is determined that the life of the LED lamp is over. At this time, the indication system will give an indication to remind the user to replace the LED lamp, thereby avoiding the inconvenience caused to the user due to insufficient illumination of the LED lamp.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is the block diagram of life detection and constant illuminance control system of LED lamp of the present invention;

Fig. 2 is the circuit diagram of control system in Fig. 1;

Fig. 3 is a wiring terminal diagram of the control system in Fig. 1;

Fig. 4 is a circuit diagram of the indicating system in Fig. 1;

Fig. 5 is a circuit diagram of LED driving in Fig. 1;

Fig. 6 is the circuit diagram of illumination acquisition system in Fig. 1;

FIG. 7 is a circuit diagram of the dimming signal system in FIG. 1 .

In the figure, R1-first resistor; R2-second resistor; R3-third resistor; R4-fourth resistor; R5-fifth resistor; R6-sixth resistor; R7-seventh resistor; R8-eighth resistor ; R9- the ninth resistor; C1- the first capacitor; C2- the second capacitor; C3- the third capacitor; C4- the fourth capacitor; C5- the fifth capacitor; C6- the sixth capacitor; D1- the first diode ; D2-second diode; Z1-first Zener diode; Z2-second Zener diode.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, the LED life detection and constant illuminance control system includes an LED lamp, the LED lamp is connected to an AC power supply through an LED driver, the LED lamp and the LED driver are connected with an LED lamp illuminance control device, and the LED lamp The lamp illuminance control device includes an illuminance collection system, the illuminance collection system is connected to a control system, the control system is connected to a dimming signal system, the LED lamp is connected to the illuminance collection system, and the LED driver is connected to the dimming signal system, The control system is connected with an indicating system.

When powering on for the first time, the illuminance acquisition system collects the illuminance of the LED lamp for the first preset time, and the control system uses the median average filter algorithm and the lag filter algorithm to perform calculations based on the collected data as the reference illuminance of the LED lamp. Stored to the storage unit of the control system.

When powering on for the first time, if the illuminance collection system collects illuminance for less than the first preset time, then when the next power-on, it will re-collect the illuminance of the LED lamp. The data is calculated by the median value average filter algorithm and the lag filter algorithm, and stored in the storage unit of the control system as the reference illuminance of the LED lamp.

The illuminance acquisition system continuously collects the illuminance of the LED lamp and compares it with the reference illuminance of the storage unit of the control system. When the real-time illuminance value is less than the reference illuminance within the second preset time range, it is determined that the life of the LED lamp is over.

When it is determined that the life of the LED lamp is over, the indicating system will give an indication to remind the user to replace the LED lamp.

The control system controls the output of the dimming signal system, controls the driving of the LED, and drives the LED lamp to work within a preset power ratio range.

The LED driver outputs a first preset power proportional to the rated power of the LED lamp, the control system controls the output of the dimming signal system, controls the LED driver, and drives the LED lamp to be less than the first preset power.

The control system compares the illuminance of the LED lights collected in real time by the illuminance collection system with the reference illuminance, and controls the dimming signal system to output a dimming signal according to the comparison result, thereby driving the illuminance value of the LED lights to be greater than the preset value.

When the illuminance of the LED lights collected in real time by the acquisition system is less than the first preset ratio of the reference illuminance, the control system controls the dimming signal system to increase the output of the dimming signal, and increases the output current of the LED dimming drive, thereby increasing the luminance of the LED lamp until the LED The real-time illuminance of the lamp is greater than a third preset ratio of the reference illuminance within a third preset time.

The LED driver transmits the POWER signal to the dimming signal system, and the dimming signal system drives the LED driver through a pulse width modulation current signal, thereby completing the adjustment of the illuminance of the LED lamp.

Specifically, please refer to Fig. 2-Fig. 7, the illuminance acquisition system includes an illuminance sensor, the SCL pin, DVI pin, and SDA pin of the illuminance sensor are respectively connected to the third resistor R3, the second resistor R2, and the fourth resistor R4. Input the power supply voltage, the DVI pin is grounded through the fourth capacitor, the VCC pin is connected to the power supply voltage, the ADDR pin is grounded through the eighth resistor R8, and the GND pin is grounded.

The LED drive includes a three-terminal voltage regulator, the input end of the three-terminal voltage regulator is connected to one end of the ninth resistor R9, the other end of the ninth resistor is connected to the positive pole of the first Zener diode, and the negative pole of the first Zener diode is connected to The input power supply is input, and the input end of the three-terminal voltage stabilizer is also grounded through the parallel connection of the first capacitor and the second Zener diode, and the cathode of the second Zener diode is connected to the input end of the three-terminal voltage stabilizer.

The control system includes a control chip, and the connection terminals of the control chip are grounded through the first resistor.

The indicating system includes three light emitting diodes, and the three light emitting diodes are respectively connected to the control chip through current limiting resistors: the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7.

The dimming signal system includes an amplifier. The first pin of the amplifier is connected to the anode of the second diode D2, and the cathode of the second diode outputs a voltage signal. The second pin of the amplifier is connected to the second and second pins through the tenth resistor R10. The negative electrode of the pole tube D2, the second pin of the amplifier is also grounded through the eleventh resistor R11, the third pin of the amplifier outputs a pulse width modulation current signal through the twelfth resistor R12, and the third pin of the amplifier is grounded through the sixth capacitor , the fourth pin of the amplifier is grounded, and the eighth pin of the amplifier is connected to the power supply voltage.

The LED lamp life detection and constant illuminance control system: This LED lamp life detection and constant illuminance control system can preset the reference illuminance of the LED lamp, and detect the real-time illuminance of the LED lamp, and compare the real-time illuminance with the reference illuminance. Use the dimming signal system to adjust the LED drive, thereby changing the illuminance of the LED light, making the LED light within the preset illuminance range, ensuring the normal light emission of the LED light, and prolonging the service life of the LED light; when the LED light is used for a period of time When the illuminance is lower than the preset illuminance value, it is determined that the life of the LED lamp is over. At this time, the indication system will give an indication to remind the user to replace the LED lamp, thereby avoiding the inconvenience caused to the user due to insufficient illumination of the LED lamp.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. A LED life detection and constant illuminance control system, comprising an LED lamp, characterized in that the LED lamp is connected to an AC power supply through an LED driver, and the LED lamp and the LED driver are connected with an LED lamp illuminance control device, the The LED lamp illuminance control device includes an illuminance collection system, the illuminance collection system is connected to a control system, the control system is connected to a dimming signal system, the LED lamp is connected to the illuminance collection system, and the LED driver is connected to the dimming signal system , the control system is connected with an indicating system. 2. LED life detection and constant illuminance control system according to claim 1, it is characterized in that, described illuminance acquisition system comprises an illuminance sensor, and the SCL pin, DVI pin, SDA pin of illuminance sensor respectively pass through the third The resistor, the second resistor, and the fourth resistor are connected to the power supply voltage, the DVI pin is grounded through the fourth capacitor, the VCC pin is connected to the power supply voltage, the ADDR pin is grounded through the eighth resistor R8, and the GND pin is grounded. 3. The LED life detection and constant illuminance control system according to claim 1, wherein the LED driver comprises a three-terminal voltage regulator, the input end of the three-terminal voltage regulator is connected to one end of the ninth resistor, and the first The other end of the nine resistors is connected to the positive pole of the first Zener diode, the negative pole of the first Zener diode is connected to the input power supply, the input terminal of the three-terminal voltage regulator is also connected to the ground through the first capacitor and the second Zener diode connected in parallel, and the second The cathodes of the two Zener diodes are connected to the input terminals of the three-terminal voltage regulator. 4. The LED life detection and constant illuminance control system according to claim 1, wherein the dimming signal system includes an amplifier, the first pin of the amplifier is connected to the positive pole of the second diode, and the second pin of the amplifier is connected to the positive pole of the second diode. The cathode of the pole tube outputs a voltage signal, the second pin of the amplifier is connected to the cathode of the second diode through the tenth resistor, the second pin of the amplifier is grounded through the eleventh resistor, and the third pin of the amplifier is connected through the twelfth resistor The resistor outputs a pulse width modulation current signal, the third pin of the amplifier is grounded through the sixth capacitor, the fourth pin of the amplifier is grounded, and the eighth pin of the amplifier is connected to the power supply voltage. 5. The LED life detection and constant illuminance control system according to claim 1, wherein the indication system includes three light-emitting diodes, and the three light-emitting diodes are respectively connected to a current-limiting resistor: the fifth resistor, the sixth resistor , the seventh resistor. 6 . The LED life detection and constant illuminance control system according to claim 1 , wherein the control system comprises a control chip, and the connection terminal of the control chip is grounded through a first resistor.