CN202958031U

CN202958031U - New type intelligent and energy-saving controller of LED (Light Emitting Diode) desk lamp

Info

Publication number: CN202958031U
Application number: CN2012206585119U
Authority: CN
Inventors: 胡恩伟; 周建林
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2012-12-04
Filing date: 2012-12-04
Publication date: 2013-05-29
Anticipated expiration: 2022-12-04

Abstract

The utility model relates to an intelligent and energy-saving controller of an LED (Light Emitting Diode) desk lamp. The intelligent and energy-saving controller of the LED desk lamp comprises an ultrasonic ranging sensor circuit (1), an ambient light sensor circuit (2), a user setup keying circuit (3) and a calculation processor (4). The ultrasonic ranging sensor circuit (1) converts distance between a user and the lamp into a pulse signal; the ambient light sensor circuit (2) converts ambient light intensity into a voltage signal; the user setup keying circuit (3) converts keying numbers of the user to a data signal; and the calculation processor (4) receives data of the user setup keying circuit (3), collects data of the ultrasonic ranging sensor circuit (1) and the ambient light sensor circuit (2) in real time, performs a calculating process, controls an LED driving circuit (5) and inputs the data to a liquid crystal display (6). The intelligent and energy-saving controller of the LED desk lamp has the advantages of accurately controlling energy consumption of the LED desk lamp and enabling the utilization of the LED lamp to be personalized.

Description

A kind of novel intelligent energy-saving LED table lamp controller

Technical field

The utility model relates to a kind of LED desk lamp parts, is specifically related to a kind of intelligent power saving LED table lamp controller.

Background technology

Along with progress and the development of science and technology, government and society is more and more paid attention to the problem of environmental protection, and the control of energy consumption has been proposed more and more higher requirement.LED is widely used in normal lighting as a kind of environmental protection and the high material of luminous efficiency.Yet, present commercially available LED table lamp controller, mostly all formed by mains switch, brightness regulation knob and LED driver, only having simple LED desk lamp opens and closes, manually brightness regulation and LED drive constant current constant voltage and control function, function singleness, and energy consumption is controlled inaccuracy, can't realize intelligent power saving, Man machine interaction is poor.

The utility model content

For the shortcoming and defect of present LED desk lamp, technical problem to be solved in the utility model just is to provide a kind of personalized LED of use desk lamp, can accurately controls the novel intelligent energy-saving LED table lamp controller of LED desk lamp power consumption.

technical problem to be solved in the utility model is to realize by such technical scheme, it comprises the ultrasonic distance-measuring sensor circuit, the ambient light sensor circuit, the user arranges key circuit and arithmetic processor, the ultrasonic distance-measuring sensor circuit is converted to a pulse signal with the user to the distance of desk lamp, the ambient light sensor circuit is converted to voltage signal with environmental light intensity, it is data-signal with user's button number conversion that the user arranges key circuit, arithmetic processor is accepted the data that the user arranges key circuit, the data of Real-time Collection ultrasonic distance-measuring sensor circuit and ambient light sensor circuit, the row operation of going forward side by side is processed, control LED drive circuit and output data to liquid crystal display.

Owing to having adopted technique scheme, by the ultrasonic distance-measuring sensor circuit, can realize automatically closing timely the LED desk lamp when user leaves on the one hand, avoid the waste of energy that causes because of user's carelessness; On the other hand by the ambient light sensor circuit, can automatically regulate according to ambient light intensity the brightness of LED desk lamp, brightness constancy in the maintenance user visual field, thereby reduce the energy consumption of LED desk lamp on daytime, and guarantee the brightness of LED desk lamp at night and cloudy day, also protected user's eyes in the time of further energy-conservation; In addition, by the user, key circuit is set, the user can preset own to the distance of LED desk lamp and the brightness of illumination voluntarily, realizes personalized configuration, is user-friendly to.The utlity model has following advantage: can accurately control the power consumption of LED desk lamp, can personalizedly use the LED desk lamp.

Description of drawings

Description of drawings of the present utility model is as follows:

Fig. 1 is circuit block diagram of the present utility model;

Fig. 2 is circuit diagram of the present utility model;

Fig. 3 is the process chart of arithmetic processor of the present utility model;

Fig. 4 is the interruption process chart of arithmetic processor of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

as shown in Figure 1, the utility model comprises ultrasonic distance-measuring sensor circuit 1, ambient light sensor circuit 2, the user arranges key circuit 3 and arithmetic processor 4, ultrasonic distance-measuring sensor circuit 1 is converted to a pulse signal with the user to the distance of desk lamp, ambient light sensor circuit 2 is converted to voltage signal with environmental light intensity, it is data-signal with user's button number conversion that the user arranges key circuit 3, arithmetic processor 4 is accepted the data that the user arranges key circuit 3, the data of Real-time Collection ultrasonic distance-measuring sensor circuit 1 and ambient light sensor circuit 2, the row operation of going forward side by side is processed, control LED drive circuit 5 and output data to liquid crystal display 6.

As shown in Figure 2, arithmetic processor 4 chips are selected the semiconductor microactuator controller LPC1114 chip based on ARM Cortex M0 kernel, ambient light sensor circuit 2 outputs connect No. 32 pins of LPC1114 chip, No. 32 pins of LPC1114 chip connect the change over switch S3 that the user arranges key circuit 3, change over switch S3 is set to high level light intensity is set, be set to low level distance is set, the output that the user arranges two button S1, S2 of key circuit 3 connects respectively LPC1114 chip 13, No. 16 pins, and button is pressed the interrupting input request that produces; No. 2 pins of LPC1114 chip connect the emission that drives ultrasonic distance-measuring sensor circuit 1 and trigger pin TRIG after triode Q1 isolation, the output of ultrasonic distance-measuring sensor circuit 1 is connected to No. 37 pins of LPC1114 chip after R4 and R8 dividing potential drop, No. 31 pin outputs of LPC1114 chip connect the input of LED drive circuit 5; The control end of liquid crystal display 6 is connected with No. 35 pins with 33,34 of LPC1114 chip, and the data terminal of liquid crystal display 6 is connected with No. 42 pins with 40,45,46,47,9,17,30 of LPC1114 chip.Liquid crystal display 6 is used for showing in real time LED desk lamp service range and the brightness that the user arranges.

LED drive circuit 5 comprises VMOS pipe Q2 amplifying circuit, the filter circuit that is formed by diode D1, capacitor C 2, C3, resistance R 12, R13 and the follower that is formed by operational amplifier U4, the output after amplifying circuit amplification, filter circuit filtering and follower isolation of the pwm signal of No. 31 pin outputs of LPC1114 chip, the driving LED lamp.Also include crystal oscillating circuit and the electric source filter circuit of LPC1114 chip in Fig. 2.

As shown in Figure 3, the handling process of arithmetic processor 4 is as follows:

In step 301, system initialization.Complete the initialization of the input and output of LPC1114 chip being controlled pin, internal mode number converter (ADC), timer, the initialization of liquid crystal display (LCD1602) and to LED desk lamp service range X0 with use brightness Y0 to compose system default value;

In step 302, read LED desk lamp service range X0 and use brightness Y0 and show on liquid crystal display;

In step 303, read active user that ultrasonic distance-measuring sensor records to the actual range X of LED desk lamp;

In step 304, relatively the LED desk lamp service range X0 that arranges of user and active user are to the actual range X of LED desk lamp: if X≤X0, execution in step 306, otherwise execution in step 305;

In step 305, close the LED desk lamp, arithmetic processor LPC1114 chip enters the sleep low-power consumption mode, then returns to step 302 and continues circulation;

In step 306, the light intensity Y in the current LED desk lamp visual field of reading that the environment Fibre Optical Sensor gathers;

In step 307, relatively the LED desk lamp that arranges of user uses the light intensity Y in brightness Y0 and the current LED desk lamp visual field, if Y=Y0 returns to step 302; Otherwise going to step 308 carries out;

In step 308, regulate the PWM output duty cycle of arithmetic processor LPC1114 chip, then return to step 302 and continue circulation.

As shown in Figure 4, the interruption handling process of arithmetic processor 4 is as follows:

In step 401, if button (increase/reduce, be i.e. button S1/S2 in Fig. 2) is pressed, produces and interrupt, enter interrupt service routine;

In step 402, the key-press status value of read functions selection key (being the change over switch S3 in Fig. 2);

In step 403, according to the function selection key state that previous step reads, revise the X0/Y0 value: if function selection key S3 state is high level, the increase key is pressed X0 and is added 1, and the minimizing button is pressed X0 and subtracted 1;

If function selection key S3 state is low level, the increase key is pressed Y0 and is added 1, and the minimizing button is pressed Y0 and subtracted 1;

In step 404, interrupt withdrawing from, overflowing of X0/Y0 processed the end interrupt service routine.

Operation principle of the present utility model is:

At first open LED desk lamp mains switch, give the power supply of this controller and LED desk lamp driver;

Then, by key-press input, user LED desk lamp service range and LED desk lamp use brightness (also can not arrange, namely adopt the system default setting: LED desk lamp service range is 50 centimetres, and it is 150 lumens that the LED desk lamp uses brightness) are set;

then, ultrasonic distance-measuring sensor and ambient light sensor are started working, the ultrasonic pulse of a 38KHz of each 200 milliseconds emissions of ultrasonic sensor, export simultaneously a high level, run into user's body (or other barriers) and reflect the high level that is detected at once output by the receiving transducer of ultrasonic sensor and drag down when surveying pulse, the timer of LPC1114 chip detects this high level time (being that rising edge is to the time-delay of trailing edge) of this moment, multiply by the aerial propagation velocity 340m/s of ultrasonic wave, and then divided by 2, can obtain the user to the actual service range of LED desk lamp, the LPC1114 chip compares the LED desk lamp service range that this distance and user arrange: as the user to the actual service range of LED desk lamp during less than or equal to user's settings, it is constant that the PWM of LPC1114 chip keeps normal output duty cycle, the normal operation of LED desk lamp, as the user to the actual service range of LED desk lamp during greater than user's settings, the PWM output duty cycle of controlling the LPC1114 chip is zero, the LED desk lamp extinguishes (closing), thereby autoshutdown LED desk lamp when realizing that the user leaves, automatically open the function of LED desk lamp when the user returns, reach energy-saving effect.Ambient light sensor is worked always, be output voltage with the ambient light intensity-conversion, the LPC1114 chip starts internal mode number converter (ADC) every 10 milliseconds and gathers once this output voltage, and the conversion of tabling look-up, obtain the real-time luminosity of current LED desk lamp, arrange to such an extent that the LED desk lamp uses brightness to compare with the user accordingly, when ambient light intensity during less than user's settings, increase the PWM output duty cycle of LPC1114 chip, lighten the LED desk lamp; Anyway during greater than user's settings, reduce the PWM output duty cycle of LPC1114 chip when ambient light intensity, dim the LED desk lamp, until ambient light intensity equals user's settings.

At last, in the use procedure of whole LED desk lamp, the user arranges the service range of LED desk lamp and use brightness by key-press input at any time, and these two parameters will be presented on the LCD1602 LCDs of controller all the time in real time.

Claims

1. novel intelligent energy-saving LED table lamp controller, it is characterized in that: comprise ultrasonic distance-measuring sensor circuit (1), ambient light sensor circuit (2), the user arranges key circuit (3) and arithmetic processor (4), ultrasonic distance-measuring sensor circuit (1) is converted to a pulse signal with the user to the distance of desk lamp, ambient light sensor circuit (2) is converted to voltage signal with environmental light intensity, it is data-signal with user's button number conversion that the user arranges key circuit (3), arithmetic processor (4) is accepted the data that the user arranges key circuit (3), the data of Real-time Collection ultrasonic distance-measuring sensor circuit (1) and ambient light sensor circuit (2), the row operation of going forward side by side is processed, control LED drive circuit (5) and output data to liquid crystal display (6).

2. novel intelligent energy-saving LED table lamp controller according to claim 1, it is characterized in that: described arithmetic processor (4) is the LPC1114 chip, ambient light sensor circuit (2) output connects No. 32 pins of LPC1114 chip, No. 32 pins of LPC1114 chip connect the change over switch S3 that the user arranges key circuit (3), and the output that the user arranges two button S1, S2 of key circuit (3) connects respectively LPC1114 chip 13, No. 16 pins; No. 2 pins of LPC1114 chip connect the emission that drives ultrasonic distance-measuring sensor circuit (1) and trigger pin TRIG after triode Q1 isolation, the output of ultrasonic distance-measuring sensor circuit (1) is connected to No. 37 pins of LPC1114 chip after R4 and R8 dividing potential drop, No. 31 pin outputs of LPC1114 chip connect the input of LED drive circuit (5); The control end of liquid crystal display (6) is connected with No. 35 pins with 33,34 of LPC1114 chip, and the data terminal of liquid crystal display (6) is connected with No. 42 pins with 40,45,46,47,9,17,30 of LPC1114 chip.

3. novel intelligent energy-saving LED table lamp controller according to claim 2, it is characterized in that: described LED drive circuit (5) comprises VMOS pipe Q2 amplifying circuit, the filter circuit that is formed by diode D1, capacitor C 2, C3, resistance R 12, R13 and the follower that is formed by operational amplifier U4, the pwm signal of No. 31 pins outputs of LPC1114 chip through amplifying circuit amplify, output after filter circuit filtering and follower isolation.