CN114501744A - Street lamp energy-saving illumination system based on PLC and working method thereof - Google Patents

Abstract

The invention discloses a street lamp energy-saving lighting system based on a PLC (programmable logic controller) and a working method thereof, wherein the street lamp energy-saving lighting system comprises the following steps: the intelligent street lamp comprises pressure sensors, infrared sensors, the illuminating street lamps and a PLC (programmable logic controller), wherein the pressure sensors are used for detecting the driving-in condition of vehicles in real time, the infrared sensors arranged on each street lamp are used for detecting the driving-out condition of the vehicles, signals of the sensors are converted into electric signals to be transmitted to the PLC, and the PLC utilizes the electric signals to realize the on-off control of the illuminating street lamps so as to achieve the optimal illuminating effect. And MCGS software is used for simulation design according to the design flow chart, so that the expected effect is better achieved. The night street lamp energy-saving system based on the PLC utilizes the advantages of flexibility, universality and low power consumption of the PLC and capability of forming various system controls on the basis of energy conservation of traditional hardware, realizes power supply of street lamps by adopting a mode of combining software and hardware, and realizes reasonable distribution of power resources in a street lamp lighting system.

Description

Street lamp energy-saving illumination system based on PLC and working method thereof

Technical Field

The invention belongs to a night street lamp energy-saving system, in particular to a street lamp energy-saving illumination system based on a PLC and a working method thereof.

Background

With the vigorous development of infrastructure construction in China, driving roads at night are constructed in a wide area. After the problem of improving the quality of life of people is solved, the road construction reaches the climax. Nowadays, each street is basically equipped with a corresponding night street lamp, and because China has a large population and a dense population distribution, the coverage rate of the corresponding street is very high, and the coverage rate of the street lamp is also continuously improved.

With the increase of street lamp coverage rate, the street lamp lighting waste condition is increasingly serious. Taking Ningbo city as an example, the electricity charge for lighting in the three years of 2018, 2019 and 2020 is almost doubled from the first 1200 ten thousand to 2300 ten thousand after three years. In most of small and medium cities, few people are on the street after midnight, and the phenomenon of 'no people have lights' is caused. Similar phenomena occur in big cities such as Beijing, Shanghai, Guangzhou and the like in two morning hours. Not only are pedestrians rare, but also the traffic flow is relatively low. From this time to the morning, street lights still provide high intensity lighting, and the resulting energy waste is significant.

In China, urban public lighting always accounts for higher proportion of lighting power consumption. Approximately 439 billion kilowatt-hours are consumed annually, calculated in 30% shares. An average of 0.65 yuan per kilowatt hour costs 285 billions annually, and this figure is increasing year by year.

The problem of energy resource waste is mainly unnecessary waste caused by maintaining high-intensity illumination at night when traffic is scarce. Street lighting construction in highway construction is yet to be further developed compared to the rapid expansion of highway infrastructure. However, in the long-term highway construction, China largely neglects the improvement and development of the street lamps in the highway construction, so that the road construction cannot benefit from illumination. In a new era, the problem of serious resource waste is solved. The waste of energy can affect the urban modernization process to a certain extent. Solving the energy waste caused by the night street lamp is very important.

Through the retrieval, application publication No. CN110337163A an energy-conserving street lamp lighting system relates to the technical field of street lamp control, and its technical scheme main points are: an energy-saving street lamp lighting system comprises street lamps arranged on a roadside, wherein a plurality of street lamps are divided into regions according to road sections, a single region is divided into a plurality of groups of street lamps, the street lamps are connected with the energy-saving lighting system, and the energy-saving lighting system comprises an inductor, a controller and a starting circuit, wherein the inductor is arranged in front of the driving direction of each group of street lamps and used for detecting running vehicles and sending starting signals; the group controller is in signal connection with the sensor and is connected with a group of street lamps, and when the sensor is triggered, the group controller controls the group of street lamps to be powered on according to the starting signal; the regional controller is connected with the group controller and used for receiving monitoring information of each road section group controller; and the central management control platform is connected with the regional controller and is used for monitoring the street lamps. The energy-saving street lamp lighting system can save electric energy to the maximum extent.

However, the invention does not consider the control situation of the street lamp in the peak time of the vehicle, and the frequent on-off control of the street lamp in the peak time of the vehicle can influence the judgment of the driver on the road condition to a certain extent, and can possibly cause traffic accidents. The street lamp energy-saving mode is turned off according to the judgment of the date and time, so that the street lamp is kept normally on.

CN206686396U, an energy-conserving street lamp control system based on PLC. The LED street lamp comprises a laser sensor, a transmitter, a receiver, a solar panel, a light-operated sensor, an LED lamp, a storage battery and a control device, a receiver circuit, a Mitsubishi PLC and a transmitter circuit, the bottom of the street lamp pole is provided with the storage battery and the control device, the top of the street lamp pole is provided with the solar panel, the solar panel is connected with the storage battery and the control device through the light-operated sensor, the storage battery and the control device are also connected with the transmitter, the receiver and the LED lamp are connected, the transmitter is arranged on the street lamp pole, the receiver, the LED lamp and the light-operated sensor, the transmitter is connected with the Mitsubishi PLC through the receiver circuit, the Mitsubishi PLC is connected with the receiver through the transmitter circuit, and the laser sensor is arranged on two sides of a road in pairs and is located on the street lamp. The utility model discloses system's hardware is simple, the programming is simplified, and is with low costs, the reliability is high.

The problem that the sensor fails under the condition of severe environment is not considered, if the sensor fails under the severe environment, the street lamp cannot be lightened, and the street lamp loses the lighting effect. If the sensor loses the effect in severe environment, the street lamp is automatically switched to the manual mode, the street lamp is in the energy-saving mode and is closed, and the working state of constant brightness is kept, so that the problem that the energy-saving street lamp loses the lighting effect in severe environment is solved, and the occurrence of traffic accidents is reduced.

Disclosure of Invention

The present invention is directed to solving the above problems of the prior art. A street lamp energy-saving lighting system based on a PLC and a working method thereof are provided. The technical scheme of the invention is as follows:

a PLC-based street light energy-saving lighting system, comprising: the system comprises pressure sensors, infrared sensors, illuminating street lamps and a PLC (programmable logic controller), wherein the buried pressure sensors are used for detecting the driving-in condition of a vehicle in real time, the infrared sensors arranged on each street lamp are used for detecting the driving-out condition of the vehicle, signals of the sensors are converted into electric signals and transmitted to the PLC, and the PLC utilizes the electric signals to realize the on-off control of the illuminating street lamps so as to achieve the optimal illuminating effect.

Further, the PLC adopts a Siemens S7-200CPU226 cn.

Further, under adverse circumstances, when pressure sensor and infrared ray sensor can't normally work, the manual work changes the mode, makes the street lamp be in operating condition all the time.

Further, the control work of the lighting street lamp is realized by a PLC programmable logic controller, and the specific flow is as follows:

setting a long conducting contact point for reading date and time, and reading a current clock through a READ _ RTC;

for the on-off control of the street lamp, when a vehicle passes through the street lamp, the sensor is conducted at a normally open point; with a rising edge, the ADD command is automatically increased by 1, which means that there is now one car between the streetlights; when the vehicle is not under the street lamp, the descending edge is used, and the SUB command is automatically reduced by 1, which indicates that no vehicle exists between the street lamps at the moment; by setting plus 1 minus 1, it indirectly represents the information of the traffic flow;

wherein, all street lamps are started in a manual emergency state; in an automatic state, if the working time is not, namely a little before the morning, the street lamp is analyzed according to the big data of the city, and if the number of vehicles is more, the street lamp is turned on before the working time; when the lamp is in the working state, the normally-on action is closed.

Further, for reading date and time, setting a long conducting contact and reading the current clock through READ _ RTC specifically includes:

reading 7 bytes including year, month, day, hour, minute, second, 00 and day of week, storing, converting the read information into BCD word and converting into binary word for comparison.

A method of operation based on any of the systems, comprising an automatic mode and a manual mode, wherein,

the automatic mode is as follows: when the pressure sensor detects an input signal of a vehicle, a physical signal is converted into an electric signal and transmitted to the PLC, and the PLC is used as a main controller to control the street lamp; when a vehicle runs in the first row of public lighting areas, the infrared sensor arranged on the street detects the vehicle information at the entrance, namely the infrared sensor of the front street lamp records the vehicle information, converts the light pulse of the vehicle information into an electric signal and transmits the electric signal to the PLC to control the lighting of the next street lamp, the infrared sensor of the next street lamp detects the vehicle information, then converts the light pulse into the electric signal to control the closing of the next street lamp, and the like until the vehicle completely runs out of the road section;

manual mode: when the pressure sensor and the infrared sensor can not work normally, the working mode is changed manually, so that the street lamp is always in a working state.

The invention has the following advantages and beneficial effects:

the invention is innovative in that the street lamp system is combined with big data analysis to analyze the peak time of the road section, and the time of day is collected and compared on the PLC, and the energy-saving mode of the street lamp is closed during the vehicle peak period, so that the street lamp is kept normal And (4) bright. The second innovation point is that in consideration of the problem that the street lamp loses the lighting effect due to the failure of the sensor under the severe environment, two modes are adopted based on this problem: the manual mode and the automatic mode are adopted in severe environment, and the street lamp is turned off The energy-saving mode keeps the street lamp always on, so that the traffic caused by the fact that the street lamp loses the illumination effect under the severe environment is greatly reduced Probability of occurrence of an accident.

Drawings

FIG. 1 is a schematic block diagram of a system in accordance with the present invention;

FIG. 2 is a hardware configuration diagram of a PLC;

FIG. 3 is a flow chart of the operation of the street lamp energy saving system;

FIG. 4 is a configuration simulation frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail and clearly with reference to the accompanying drawings. The described embodiments are only some of the embodiments of the present invention.

The technical scheme for solving the technical problems is as follows:

the invention discloses a night lamp energy-saving system, which is a night street lamp energy-saving system with real-time controllability. The pressure sensor is arranged at the starting position of the row of the street lamps running in the one-way direction, so that the vehicles can be detected in real time. Each street lamp is provided with an infrared sensor for detecting vehicles in real time, and the signals are used for turning on and off the street lamp so as to obtain the optimal lighting effect. The principle of system design is that the front row controls the lighting of the rear row, and the rear row controls the extinguishing of the front row.

On one hand, the invention can realize the lighting effect of the early and late street lamp according to the sun and sunrise of the same day and realize the lighting effect of the street lamp at night under the permission of the surrounding environment. On the other hand, if the environmental conditions do not allow, the detection accuracy of the sensor can be switched to a manual mode to avoid loss due to system errors. The design realizes the locking effect by means of sensor signals among the street lamps, and provides the energy-saving effect of real-time control of the street lamps at night.

In the invention, in terms of selecting the number of input/output ports, a certain margin is required to be met in addition to a certain input/output port, and the specific model of the Siemens PLC is selected as follows: s7-200CPU226 cn.

As shown in fig. 1, a PLC-based street lamp energy-saving lighting system includes: the intelligent street lamp comprises pressure sensors, infrared sensors, the illuminating street lamps and a PLC (programmable logic controller), wherein the pressure sensors are used for detecting the driving-in condition of vehicles in real time, the infrared sensors arranged on each street lamp are used for detecting the driving-out condition of the vehicles, signals of the sensors are converted into electric signals to be transmitted to the PLC, and the PLC utilizes the electric signals to realize the on-off control of the illuminating street lamps so as to achieve the optimal illuminating effect.

Preferably, the PLC adopts Siemens S7-200CPU226 cn.

Preferably, under the adverse circumstances, when pressure sensor and infrared ray sensor can't normally work, the manual work changes mode, makes the street lamp be in operating condition all the time.

Preferably, the control work of the lighting street lamp is realized by a PLC (programmable logic controller), and the specific flow is as follows:

setting a long conducting contact point for reading date and time, and reading a current clock through a READ _ RTC;

for the on-off control of the street lamp, when a vehicle passes through the street lamp, the sensor is conducted at a normally open point; with a rising edge, the ADD command is automatically increased by 1, which means that there is now one car between the streetlights; when the vehicle is not under the street lamp, the descending edge is used, and the SUB command is automatically reduced by 1, which indicates that no vehicle exists between the street lamps at the moment; by setting plus 1 minus 1, it indirectly represents the information of the traffic flow;

wherein, all street lamps are started in a manual emergency state; in an automatic state, if the working time is not, namely a little before the morning, the street lamp is analyzed according to the big data of the city, and if the number of vehicles is more, the street lamp is turned on before the working time; when the lamp is in the working state, the normally-on action is closed.

Preferably, for the reading date and time, setting a long conducting contact and reading the current clock through the READ _ RTC specifically includes:

reading 7 bytes including year, month, day, hour, minute, second, 00 and day of week, storing, converting the read information into BCD word and converting into binary word for comparison.

A method of operation based on any of the systems, comprising an automatic mode and a manual mode, wherein,

the automatic mode is as follows: when the pressure sensor detects an input signal of a vehicle, a physical signal is converted into an electric signal and transmitted to the PLC, and the PLC is used as a main controller to control the street lamp; when a vehicle runs in the first row of public lighting areas, the infrared sensor arranged on the street detects the vehicle information at the entrance, namely the infrared sensor of the front street lamp records the vehicle information, converts the light pulse of the vehicle information into an electric signal and transmits the electric signal to the PLC to control the lighting of the next street lamp, the infrared sensor of the next street lamp detects the vehicle information, then converts the light pulse into the electric signal to control the closing of the next street lamp, and the like until the vehicle completely runs out of the road section;

manual mode: when the pressure sensor and the infrared sensor can not work normally, the working mode is changed manually, so that the street lamp is always in a working state.

The invention can carry out energy-saving control according to time periods, and carry out big data analysis on the passing condition of vehicles at road sections, for example, more vehicles pass through before a little in the early morning, and the street lamp is always in a full-bright state; and after a point, the vehicles are sparse, at the moment, the street lamp system starts an energy-saving mode, the driving condition of the vehicles is detected through a sensor, and the street lamp correspondingly conducts on-off control.

Automatic mode of the invention: when the pressure sensor detects the input signal of the vehicle, the physical signal is converted into an electric signal and transmitted to the PLC, and the PLC controls the street lamp as a main controller. When a vehicle runs in the first row of public lighting area, the infrared sensor arranged on the street detects the vehicle information at the entrance, namely the infrared sensor of the front street lamp records the vehicle information, converts the light pulse of the vehicle information into an electric signal, transmits the electric signal to the PLC, controls the lighting of the next street lamp, detects the vehicle information by the infrared sensor of the next street lamp, and then converts the light pulse into the electric signal to control the turning off of the next street lamp. And so on until the vehicle has completely driven out of the road segment.

Manual mode: under adverse circumstances, pressure sensor and infrared sensor can't normally work, and the manual work changes mode, makes the street lamp be in operating condition all the time.

And (3) street lamp illumination: according to the data of the season, sunrise and sunset in the daytime, the working state of the street lamp before night can be automatically started.

The work of the street lamp is realized by a PLC programmable logic controller, and the specific flow is as follows:

for reading date and time, a long conductive contact is set and the current clock is READ by READ _ RTC. Reading 7 bytes including year, month, day, hour, minute, second, 00 and day of week, storing, converting the read information into BCD word and converting it into binary word for comparison.

For the on-off control of the street lamp, when a vehicle passes through the street lamp, the sensor is conducted at a normally open point. We use the rising edge, ADD command to automatically increment by 1, which means that there is now a car between the street lights. When the vehicle is not under the street lamp, we use the falling edge, the SUB command is automatically decremented by 1, indicating that there is no vehicle between the street lamps at this time. By setting plus 1 minus 1, it indirectly represents information of traffic flow.

Wherein all street lamps are switched on in a manual emergency state. In the automatic state, if the working time is not, namely a little before the morning, the street lamps are analyzed according to the big data of the city, and if the number of vehicles is large, the street lamps are turned on before the working time. When the lamp is in the working state, the normally-on action is closed.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.

Claims (6)

1. The utility model provides a street lamp energy-saving lighting system based on PLC which characterized in that includes: the intelligent street lamp comprises pressure sensors, infrared sensors, the lighting street lamps and a PLC (programmable logic controller), wherein the pressure sensors are conventional buried sensors and are used for detecting the driving-in condition of a vehicle in real time, the infrared sensors arranged on each street lamp detect the driving-out condition of the vehicle, signals of the sensors are converted into electric signals and transmitted to the PLC, and the PLC utilizes the electric signals to realize the on-off control of the lighting street lamps so as to achieve the optimal lighting effect.

2. The PLC-based street lamp energy-saving lighting system as claimed in claim 1,

the PLC programmable logic controller adopts Siemens S7-200CPU226 cn.

3. The PLC-based street lamp energy-saving illumination system as claimed in claim 1, wherein in a severe environment, when the pressure sensor and the infrared sensor cannot work normally, the working mode is manually changed, so that the street lamp is always in a working state.

4. The PLC-based street lamp energy-saving illumination system as claimed in claim 1, wherein the control work of the illumination street lamp is realized by a PLC programmable logic controller, and the specific flow is as follows:

setting a long conducting contact point for reading date and time, and reading a current clock through a READ _ RTC;

for the on-off control of the street lamp, when a vehicle passes through the street lamp, the sensor is conducted at a normally open point; with a rising edge, the ADD command is automatically increased by 1, which means that there is now one car between the streetlights; when the vehicle is not under the street lamp, the descending edge is used, and the SUB command is automatically reduced by 1, which indicates that no vehicle exists between the street lamps at the moment; by setting plus 1 minus 1, it indirectly represents the information of the traffic flow;

wherein, all street lamps are started in a manual emergency state; in an automatic state, if the working time is not, namely a little before the morning, the street lamp is analyzed according to the big data of the city, and if the number of vehicles is more, the street lamp is turned on before the working time; when the lamp is in the working state, the normally-on action is closed.

5. The PLC-based street lamp energy-saving lighting system according to claim 4, wherein for reading date and time, setting a long conducting contact and reading a current clock through a READ _ RTC specifically comprises:

reading 7 bytes including year, month, day, hour, minute, second, 00 and day of week, storing, converting the read information into BCD word and converting into binary word for comparison.

6. A method of operation based on the system of any one of claims 1-5, comprising an automatic mode and a manual mode, wherein,

the automatic mode is as follows: when the pressure sensor detects an input signal of a vehicle, a physical signal is converted into an electric signal and transmitted to the PLC, and the PLC is used as a main controller to control the street lamp; when a vehicle runs in the first row of public lighting areas, the infrared sensor arranged on the street detects the vehicle information at the entrance, namely the infrared sensor of the front street lamp records the vehicle information, converts the light pulse of the vehicle information into an electric signal and transmits the electric signal to the PLC to control the lighting of the next street lamp, the infrared sensor of the next street lamp detects the vehicle information, then converts the light pulse into the electric signal to control the closing of the next street lamp, and the like until the vehicle completely runs out of the road section;

manual mode: when the pressure sensor and the infrared sensor can not work normally, the working mode is changed manually, so that the street lamp is always in a working state.

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