CN203136280U - Controller for adjusting LED street lamp brightness based on speed and volume information - Google Patents

Abstract

The utility model relates to a controller for adjusting LED street lamp brightness based on speed and volume information, which comprises a central control unit, a LED drive circuit connected with the central control unit, a light intensity detector arranged by facing to a LED assembly and connected to the central control unit, a radar inductor connected to the central control unit and used for measuring adjusted brightness of super brightness LED assembly while a vehicle moves, and a radar velometer connected to the central control unit and used for controlling the order unlatching time of various LED street lamps at the front of the vehicle according to the measured vehicle speed. When the vehicle arrives at the place below the corresponded LED street lamp, the brightness of the street lamp is in a bright state, simultaneously, the brightness of other street lamps is in a little dark state; the radar inductor and the radar velometer are arranged at the top of a lamp rod of the street lamp, and the controller is benefit for remote detection.

Description

A controller for adjusting the brightness of LED street lamps based on speed and volume information

technical field

The utility model relates to a controller for adjusting the brightness of LED street lamps based on speed and volume information.

Background technique

The automatic opening and closing of existing LED lights adopts infrared sensing or voice control; it is easily disturbed by pets (such as: cats, dogs, etc.), how to control the opening and closing of LED lights based on the presence or absence of vehicles or people? Brightness is a technical problem in this field.

Utility model content

The technical problem to be solved by the utility model is to provide a controller for adjusting the brightness of LED street lamps based on speed and volume information, which is suitable for controlling the on/off or brightness of LED lamps only according to the presence or absence of vehicles or people.

In order to solve the above technical problems, the utility model provides a controller for adjusting the brightness of LED street lamps based on speed and volume information, including: a central control unit, an LED drive circuit connected to the PWM signal output end of the central control unit, and the The super bright LED assembly connected to the LED drive circuit, the light intensity detector that is arranged opposite to the super bright LED assembly and connected with the feedback signal input end of the central control unit, and the light intensity detector connected with the central control unit for measuring A radar sensor that adjusts the brightness of the ultra-bright LED assembly when the vehicle is in motion, and a radar that is connected to the central control unit and is used to control the sequential turn-on time of a plurality of LED street lights in front of the vehicle according to the measured vehicle speed Speedometer, so that when the vehicle arrives under the corresponding LED street lamp, the brightness of the street lamp is in a high state, and at the same time the brightness of other street lamps is in a low state; top for remote detection.

The drive circuit includes an LED drive chip modeled as LT3474.

The LED chips in the LED assembly are packaged on a substrate, the substrate is provided with a reflective layer, and the substrate is covered with a hemispherical light-transmitting cover; in order to improve the softness of light, the light-transmitting cover is milky white and translucent A cover, or a transparent cover with a white diffuse reflection layer on the inner wall, or a transparent cover with a scattering agent layer on the inner wall.

The central control unit is also connected with a wireless network communication module for remote monitoring of the current brightness; the wireless network communication module is a GSM or 3G or wifi communication module.

The top of the street lamp pole is provided with a wind power generation component, and the street lamp pole is provided with a storage battery, and the storage battery is connected to the LED driving circuit through a power supply constant current module.

The central control unit is also connected with a horn driver for driving a voice horn to warn of overspeed when the radar speedometer detects that the vehicle is overspeed, so as to realize humanized management and reduce the incidence of traffic accidents.

Compared with the prior art, the above-mentioned technical solution of the utility model has the following advantages: (1) through the control of the central control unit (which adopts intelligent controllers such as AVR single-chip microcomputer, or CPLD, or FPGA, or DSP, or ARM), change the corresponding The duty cycle of the PWM control signal stabilizes the light intensity of the super bright LED component. In order to avoid the flickering effect, usually the frequency of the PWM pulse waveform should be greater than 200Hz. Through this circuit, real-time adjustment of LED light brightness according to radar sensing is realized; (2) The radar sensor used is suitable for distinguishing the size and height of moving targets, and the radar speedometer is used to further confirm the speed of the vehicle, thereby ensuring that the vehicle arrives at When the corresponding LED street lamp is below, the brightness of the street lamp is in a high state, and at the same time, the brightness of other street lamps is in a low state, and the lamp is prevented from being turned on by mistake, which is beneficial to energy saving. (3) Use light detectors to realize feedback control and overcome light intensity changes caused by LED aging; in addition, wireless communication devices can also be used to adjust the light intensity of LED lamps through wireless network communication modules to achieve the effect of remote control lighting .

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be further described in detail according to the specific embodiments below in conjunction with the accompanying drawings, wherein

Fig. 1 is the structural block diagram of the controller for adjusting the brightness of LED street lamps based on speed and volume information;

Fig. 2 is a schematic circuit diagram of the LED driving circuit.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:

Example 1

As shown in Figure 1, the controller for adjusting the brightness of LED street lamps based on speed and volume information in this embodiment includes a central control unit, an LED drive circuit connected to the PWM signal output end of the central control unit, and a supercharger connected to the LED drive circuit. A bright LED assembly, a light intensity detector that is opposite to the super bright LED assembly and connected to the feedback signal input end of the central control unit, connected with the central control unit to measure the height of the vehicle when it is active The radar sensor of the brightness of the ultra-bright LED assembly, the radar speed detector connected to the central control unit and used to control the successive turn-on times of a plurality of LED street lights in front of the vehicle according to the measured vehicle speed, so that the When the vehicle arrives under the corresponding LED street lamp, the brightness of the street lamp is in a high state, and at the same time, the brightness of other street lamps is in a low state; probing.

When working, the radar speedometer is used to further confirm the speed of the vehicle, so as to ensure that when the vehicle reaches the corresponding LED street lamp, the brightness of the street lamp is in a high state, and at the same time, the brightness of other street lamps is in a low state, and avoid lights being mistaken. Enabled to save energy.

The drive circuit includes an LED drive chip modeled as LT3474.

The LED chips in the LED assembly are packaged on a substrate, the substrate is provided with a reflective layer, and the substrate is covered with a hemispherical light-transmitting cover; in order to improve the softness of light, the light-transmitting cover is milky white and translucent A cover, or a transparent cover with a white diffuse reflection layer on the inner wall, or a transparent cover with a scattering agent layer on the inner wall.

The central control unit is also connected with a wireless network communication module for remote monitoring of the current brightness; the wireless network communication module is a GSM or 3G or wifi communication module.

The top of the street lamp pole is provided with a wind power generation component, and the street lamp pole is provided with a storage battery, and the storage battery is connected to the LED driving circuit through a power supply constant current module.

As shown in Fig. 2, the drive circuit adopts Linear Technology's LED drive chip LT3474, which is an LED constant current drive control chip with adjustable rated output current, and the maximum drive current can reach 1A. It provides 2 kinds of driving methods: analog regulation method and PWM regulation method. In the PWM adjustment mode, by changing the duty cycle of the external PWM signal, a dimming ratio of 400:1 can be realized.

The analog adjustment method is to use the PWM controller to adjust the driving current to stabilize the driving current of the LED and obtain a stable output light intensity. Since the feedback control signal of the PWM controller is usually a voltage value, the analog adjustment is to use a measurement resistor to sample the output drive current and convert it into a feedback voltage signal, and the feedback voltage is stabilized by the PWM controller to achieve The purpose of stabilizing the output drive current.

Apparently, the above-mentioned embodiments are only examples for clearly illustrating the utility model, rather than limiting the implementation manner of the utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or variations derived from the spirit of the present utility model are still within the protection scope of the present utility model.

Claims (6)

1. one kind based on speed, volume information is regulated the controller of LED street lamp brightness, it is characterized in that comprising: central control unit, the led drive circuit that links to each other with the pwm signal output of this central control unit, the ultra-bright LED assembly that links to each other with this led drive circuit, light intensity detector that be oppositely arranged with this ultra-bright LED assembly and that link to each other with the feedback signal input of described central control unit, being used for of linking to each other with this central control unit records the radar inductor that vehicle is heightened the brightness of described ultra-bright LED assembly when movable, and the car speed that being used for of linking to each other with this central control unit, basis recorded is controlled the priority open-interval radar trap of a plurality of LED street lamps of this vehicle front; Described radar inductor and radar trap are located at the top of street lamp post.

2. according to claim 1ly regulate the controller of LED street lamp brightness based on speed, volume information, it is characterized in that: described drive circuit comprises that model is that the LED of LT3474 drives chip.

3. the controller of regulating the LED street lamp brightness based on speed, volume information according to claim 1, it is characterized in that: the led chip in the described LED assembly is encapsulated on the substrate, this substrate is provided with the reflector, is covered with the hemisphere diffuser on this substrate; This diffuser is milky white translucent mask, or inwall is provided with the translucent cover of white diffuse reflector, or inwall is provided with the translucent cover of scattering diluent layer.

4. according to the described controller based on speed, volume information adjusting LED street lamp brightness of one of claim 1 to 3, it is characterized in that: described central control unit also is connected with the wireless network communication module for the current brightness of remote monitoring; This wireless network communication module is GSM or 3G or wifi communication module.

5. the controller of regulating the LED street lamp brightness based on speed, volume information according to claim 4, it is characterized in that: the top of described street lamp post is provided with the wind power generation assembly, be provided with storage battery in the street lamp post, this storage battery links to each other with described led drive circuit through power supply current stabilization module.

6. according to the described controller based on speed, volume information adjusting LED street lamp brightness of one of claim 1 to 3, it is characterized in that: described central control unit also is connected with for the loudspeaker driver that drives voice loudspeaker caution hypervelocity when recording described overspeed of vehicle by described radar trap.