CN203039959U - Microwave inductive switch circuit for parking lot - Google Patents

Abstract

A microwave induction switch circuit for parking lots, mainly composed of power supply, capacitor voltage drop circuit, antenna ring, microwave induction controller, light control circuit, delay timer and LED fluorescent lamp; the power supply is converted by the capacitor voltage drop circuit The microwave sensor is powered by 11V DC. The microwave sensor controller uses a micro-antenna ring for microwave detection. The antenna ring is used as a transmitting antenna and receives echoes reflected by human body or vehicle movement. It is composed of a photosensitive resistor, the delay timer is connected to a microwave induction controller, and the timing function is realized by charging a fixed capacitor, and the microwave induction controller controls the startup and shutdown of the LED fluorescent lamp by controlling the bidirectional thyristor. The utility model is based on microwave technology. Automatic control, when the light intensity is lower than a certain range, when someone enters the switch sensing range, the LED fluorescent lamp in the parking lot will automatically turn on, and after the person leaves, the switch delay will automatically turn off the LED fluorescent lamp.

Description

A microwave induction switch circuit for parking lot

technical field

The utility model relates to a lighting device with an induction switch, in particular to a microwave induction switch circuit used in a parking lot.

Background technique

Since the late 1960s, when gallium arsenide basically used phosphide to invent the first visible infrared LED, with breakthroughs in semiconductor and LED packaging technologies, the power levels of single-chip red, green, blue, and white LEDs And the brightness is continuously improved. With the obvious improvement of LED light efficiency, lifespan and light color, it has great potential in the fields of display, backlight, decoration and lighting. Although the application level of LED continues to expand, its lifespan and light efficiency are higher than traditional lighting. However, the cost is relatively high, and the cost of LED light sources accounts for as high as 50% to 90% of the total cost. There is still room for improvement in lighting source technology, and the problems of high-power LED heat dissipation and light efficiency are prominent, which limits the further development of LED in the field of lighting. application.

Contents of the invention

In order to overcome the deficiencies of the prior art above, the purpose of this utility model is to provide a microwave induction switch circuit for the parking lot. Based on the automatic control of microwave technology, when the light intensity is lower than a certain range, when someone enters the switch induction range , the LED fluorescent lamps in the parking lot are automatically turned on, and after the person leaves, the switch delay automatically turns off the LED fluorescent lamps.

In order to achieve the above object, the technical solution adopted by the utility model is:

A microwave induction switch circuit for a parking lot, the circuit device is mainly composed of a power supply, a capacitor voltage drop circuit, an antenna ring, a microwave induction controller, a light control circuit, a delay timer and an LED fluorescent lamp; The circuit converts the power supply to 11V DC to power the microwave sensor. The microwave sensor controller uses a micro-antenna ring for microwave detection. The antenna ring not only serves as a transmitting antenna but also receives the echo reflected by the movement of the human body or the vehicle. The light control circuit is connected to the microwave sensor. The controller is mainly composed of photoresistors. The delay timer is connected to the microwave induction controller. The timing function is realized by charging the fixed capacitor. The microwave induction controller controls the startup and shutdown of the LED fluorescent lamp by controlling the bidirectional thyristor.

Compared with the prior art, the utility model adopts the LED lighting circuit with induction function. The LED energy-saving fluorescent lamp uses the new PIR technology and high-efficiency white LED to detect the movement of the human body or the heat source and automatically start the lamp. When the human body or the vehicle leaves After that, the light will turn off automatically without touching any switches, which is convenient and energy-saving. At the same time, this product has a delay function, that is, after people or other heat sources leave, the LED lights will go out after a certain period of time; it can prevent the LED lights from being continuously turned on and off. waste.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in more detail.

As shown in the figure, the utility model is a microwave induction switch circuit for a parking lot. The circuit device is mainly composed of a power supply, a capacitor drop circuit, an antenna ring, a microwave induction controller, a light control circuit, and a delay timer. It is composed of LED fluorescent lamps; the power supply is converted into 11V DC through the capacitor voltage drop circuit to supply power for the microwave sensor, and the power supply adopts commercial power. The microwave induction controller uses a miniature antenna ring for microwave detection. The antenna ring is used as a transmitting antenna and receives echoes reflected by human body or vehicle movement. The light control circuit is connected to the microwave induction controller, which is mainly composed of photoresistors and delay timer Connected to the microwave induction controller, the timing function is realized by charging the fixed capacitor, and the microwave induction controller controls the startup and shutdown of the LED fluorescent lamp by controlling the bidirectional thyristor.

The antenna ring produces a space microwave warning area. When the human body or vehicle moves, the echo emitted by it interferes with the original microwave field emitted by the microwave induction controller and changes, and the voltage control signal is output after a series of changes. If people or vehicles leave the monitoring range, the size of the charging point capacitor can be calculated according to the required delay time. When the voltage of the charging capacitor is greater than 1/2 of the power supply voltage, the bidirectional thyristor will be cut off and the LED fluorescent lamp will go out.

Claims (1)

1. a microwave inductive switch circuit that is used for the parking lot is characterized in that this circuit arrangement mainly is made up of power supply, electric capacity pressure drop circuit, antenna loop, microwave induction controller, light-operated circuit, back off timer and LED fluorescent lamp; Be microwave sensor power supply with power conversion for the 11V direct current by electric capacity pressure drop circuit, microwave induction controller uses the miniature antenna ring to do microwave and detects, antenna loop had not only been made transmitting antenna but also had been received by human body or vehicle and moved and the echo that reflects, light-operated circuit connects microwave induction controller, mainly constituted by photo resistance, back off timer connects microwave induction controller, by realizing timing function to the fixed capacity charging, microwave induction controller is controlled the startup of LED fluorescent lamp by the control bidirectional triode thyristor and is closed.

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