CN202535585U - Intelligent streetlamp control system based on light and heat - Google Patents

Abstract

The utility model discloses an intelligent street lamp control system based on light and heat sensors, which includes a light intensity sensor, and the light intensity sensor is electrically connected with a signal amplification circuit, a rectification circuit, a logic control circuit, a delay circuit, an electronic switch, a lamp A human body pyroelectric infrared sensor is also connected in front of the signal amplification circuit, and a Fresnel lens is arranged in front of the human body pyroelectric infrared sensor. The utility model does not require human intervention, reduces the error rate, and improves the intelligence and accuracy of the street lamp control system.

Description

Intelligent Street Light Control System Based on Light and Thermal Sensors

technical field

The utility model mainly relates to the field of street lamps, in particular to an intelligent street lamp control system based on light and heat sensors.

Background technique

At present, the road light control system of many buildings controls the lights by man-made sounds from the outside at night. If other animals pass by or other sounds will cause the system to make a misjudgment and cause the lights to turn on.

For an intelligent street lighting system, it is very important to be able to accurately judge whether someone is passing by in dark conditions. Traditional switching street lamps and voice-activated street lamp systems require human control of the switch or the lighting of street lamps by emitting a certain sound. For the switch-controlled street light system, the switch of the street light is often on the side of the corridor. When pedestrians pass by, there is no way to turn it off in time, resulting in long-term lighting and waste; , Clapping, stomping and other behaviors can make the street lamps light up, generate noise, and affect the normal rest of the surrounding people. It can be seen that these two methods are very inconvenient and prone to misoperation, so these two street lamp control systems cannot be used effectively. role, can not achieve intelligence.

Utility model content

The purpose of this utility model is to make up for the defects of the prior art, to provide a system that can automatically detect whether someone passes through, and whether the ambient brightness meets the conditions for turning on the street lamp, and can control the light on and off, so that passers-by can pass safely. Intelligent street light control system based on the principle of strong sensor and infrared human body heat induction sensor.

The utility model is achieved through the following technical solutions:

An intelligent street lamp control system based on light and heat sensors, including a light intensity sensor, the light intensity sensor is electrically connected with a signal amplification circuit, a rectification circuit, a logic control circuit, a delay circuit, an electronic switch, and a lamp in sequence, and its features In that: a human body pyroelectric infrared sensor is also connected in front of the signal amplification circuit, and a Fresnel lens is arranged in front of the human body pyroelectric infrared sensor.

The infrared sensor receives infrared rays near the 10um band emitted by the human body.

The human body pyroelectric infrared sensor is equipped with two detection components, and the two detection components are connected in series with opposite polarities.

The upper and lower parts of the Fresnel lens are each divided into several equal parts.

The working principle of the utility model is:

When the light becomes dark and someone enters the sensing range of the infrared human body thermal sensor, both the light intensity sensor and the infrared sensor output a high level, and after the signal amplification and rectification circuit, they are connected to the logic circuit. At this time, the system outputs a high level control When the electronic switch is turned on, the street lamp is automatically turned on; when the person leaves the sensing range of the infrared human body thermal sensor, the infrared human body thermal sensor outputs a low level, and the street lamp is automatically turned off. Because the delay circuit is connected to the circuit, the interference effect of the light on the light intensity sensor after the light is turned on can be eliminated.

The beneficial effects of the utility model are:

(1) Install two detection components in the sensor, and connect the two detection components in series with reverse polarity to suppress the interference caused by the rise of its own temperature.

(2) A Fresnel lens is installed in front of the detector, and the upper and lower parts of the Fresnel lens are divided into several equal parts to form a lens with a special optical system, which cooperates with the amplifier circuit , the signal can be amplified by more than 70 decibels, so that the movement of the human body within the range of 5-7 meters can be measured, and the height between it and the ground sensing area can be changed by changing the size range of the Fesnel lens, so that it can avoid due to Interference and misjudgment caused by animals or other objects (objects that are close to the infrared band emitted by the human body).

(3) The infrared sensor receives the infrared rays near the 10um band emitted by the human body, and after the signal is collected, it is amplified and processed, and the control information is output to realize the automatic switch of the street lamp, which not only avoids other non-human interference, but also saves power.

(4) The system does not require human intervention, which reduces the error rate and improves the intelligence and accuracy of the street lamp control system.

Description of drawings:

Fig. 1 is a functional block diagram of the utility model.

Fig. 2 is a schematic diagram of the sensing range of the infrared sensor of the present invention.

Fig. 3 is the front view of the installation diagram of the sensor of the present invention.

Fig. 4 is a top view of the installation diagram of the sensor of the present invention.

Detailed ways:

As shown in Figure 1, the intelligent street lamp control system based on light and heat sensors includes a light intensity sensor 1, and the light intensity sensor 1 is electrically connected to a signal amplifier circuit 2, a rectifier circuit 3, a logic control circuit 4, and a delay circuit 5 in sequence. , electronic switch 6, lamp 7, also be connected with a human body pyroelectric infrared sensor 8 before the signal amplification circuit 2, the front of human body pyroelectric infrared sensor 8 is provided with a Fresnel lens.

The human body pyroelectric infrared sensor 8 receives infrared rays near the 10um wave band emitted by the human body.

Two detection assemblies are installed in the human body pyroelectric infrared sensor 8, and the two detection assemblies are connected in series with opposite polarities.

The signals of human pyroelectric infrared sensor 8 and light intensity sensor 1 are connected to logic control circuit 4 after amplifier circuit 2 and rectification circuit 3, and then connected to electronic switch 6 through delay circuit 5 to control the automatic turning on and off of street lamp 7.

The human body pyroelectric infrared sensor used in this embodiment is a novel high-sensitivity detection component. It detects the change of the infrared radiation ability of the human body in a non-contact form and converts it into a voltage signal output, and amplifies the voltage signal to drive the control circuit to complete the function of street lamp lighting. Load two detection components into the sensor, and connect the two detection components in series with reverse polarity to suppress the interference caused by the rise of its own temperature. In order to improve the detection sensitivity of the detector and increase the detection distance, we install a Fresnel lens in front of the detector, which is made of transparent plastic and divides the upper and lower parts of the lens into several equal parts. A lens with a special optical system has been made, which cooperates with the amplification circuit to amplify the signal by more than 70 decibels, so that the movement of the human body within the range of 5-7 meters can be measured, as shown in Figure 2. The sensing range of the sensor . We install the sensor next to the street lamp, and change the height between the Fresnel lens and the ground sensing area by changing the size range of the Fresnel lens, so that it can avoid being caused by animals or other objects (objects that are close to the infrared wave band emitted by the human body) interference and misjudgment.

As shown in Figures 3 and 4: According to the range of the receiving angle of the infrared human body pyroelectric sensor, we install the infrared human body infrared thermal sensor on the wall under the street lamp while minimizing the blind area (it can be rooted between two street lamps) Choose the appropriate number of sensors and installation methods according to the distance and road width), light intensity sensors can be installed in the middle of the corridor, or installed in the aisles up and down the stairs to ensure continuous lighting on different floors when going up and down the stairs. The signal amplification circuit, the rectification circuit, the logic control circuit and the delay circuit are installed together with the sensor, and the electronic switch is installed on the wall at the entrance of the corridor. When the light is dimmed, the light intensity sensor outputs a high level. If someone is close to the street lamp, the sensor also outputs a high level within the sensing range of the infrared human body pyroelectric sensor. The two signals are amplified and then connected to the rectifier circuit. Then the electronic switch is connected after passing through the logic control circuit, because at this time the logic circuit outputs a high level, the electronic switch is turned on and the light is on. Because the system contains a delay circuit, it will remain on for a period of time after the light is turned on regardless of whether the light intensity sensor and the infrared human body heat sensor become low. As people move forward and reach the monitoring range of the next street light, the next street light will be on. If it is still within the sensing range of the first street light at this time, and the delay time of the second street light has passed, the first street light will It will still be on, otherwise it will be off. The front street lights are turned on and the rear street lights are turned off in turn, so that people can pass safely.

Claims (4)

1. An intelligent street lamp control system based on light and heat sensors, comprising a light intensity sensor, which is electrically connected to a signal amplifier circuit, a rectifier circuit, a logic control circuit, a delay circuit, an electronic switch, and a lamp in sequence after the light intensity sensor, It is characterized in that: a human body pyroelectric infrared sensor is also connected in front of the signal amplification circuit, and a Fresnel lens is arranged in front of the human body pyroelectric infrared sensor. 2. The intelligent street lamp control system based on light and thermal sensors according to claim 1, characterized in that: said infrared sensor receives infrared rays near the 10um band emitted by the human body. 3. The intelligent street lamp control system based on light and thermal sensors according to claim 1, characterized in that two detection components are installed in the pyroelectric infrared sensor of the human body, and the two detection components are connected in series with reverse polarity . 4. The intelligent street lamp control system based on light and thermal sensors according to claim 1, wherein the upper and lower parts of the Fresnel lens are each divided into several equal parts.

Images