The application of street lamps in the city is very extensive. Urban lighting occupies a large proportion of the electricity consumption in China. Today, the wireless geomagnetic detector is introduced to introduce the application of geomagnetic detectors in street lamp energy saving:
High-pressure sodium lamp energy-saving transformation
The existing high-pressure sodium lamp lighting dimming methods at home and abroad usually have some lights on and off, autotransformer dimming, thyristor chopping dimming and current limiting dimming. Part of the light on and off mode is mainly to use light control, timing and other means, in the latter half of the night to turn off some of the street lights, generally can save more than 10%. However, this method will weaken the lighting comfort and increase the power supply loop, and can not avoid the loss of the street lamp life due to the increase of the grid voltage in the middle of the night. The autotransformer can’t realize the automatic and precise control of the voltage. It can only reduce the voltage fixedly, can not be boosted and stabilized, and can not achieve continuous dimming. The thyristor chopper dimming control device can accurately control the output voltage in real time to meet the optimal value of lighting power, but the voltage cannot achieve sine wave output, and there is serious harmonic pollution, which cannot achieve green environmental protection. The current limiting dimming mode limits the operating current of the flowing street lamp by increasing the reactance value, and cannot automatically and accurately control the current, that is, continuous dimming cannot be achieved.
In view of the shortcomings of the above four dimming methods, our company and the Chinese Academy of Sciences have jointly developed an intelligent dimming system that uses digitally controlled dimming technology to achieve dynamics of street lamp voltage and illumination according to the actual conditions of road lighting. Intelligent management to achieve the best match between street lamp input power and illumination requirements. Same as energy management.
Intelligent energy saving system
The intelligent dimming system uses digital control dimming technology and geomagnetic detector to achieve dynamic intelligent management of street lamp voltage and illumination according to the actual situation of road lighting, so that the street lamp input power can be optimally matched with the illumination requirement. During busy hours, each individual street light is controlled to maintain strong illumination. The intelligent dimming system automatically dims according to the condition that the geomagnetic detector detects the vehicle. If there is no vehicle passing, the street light is dark, when there is a car coming. At the time, the street lights in front of it turned dark, and several street lights that the car had already turned on were automatically dimmed.
The geomagnetic detector measures the city road for the vehicle to obtain the corresponding illuminance adjustment rate to actually control the brightness of the street lamp. Starts at a certain position before the vehicle travels, and smoothly adjusts the street lamp input voltage dynamically.
M&T Technology is a professional equipment supplier and solution service provider in the field of smart parking in China. Products cover dynamic flow detection, static parking space detection, cloud smart parking space control system and so on. The main products include wireless geomagnetic vehicle detector, NB-IoT geomagnetic parking position detector, ultrasonic parking position detector, shared parking lock, intelligent parking lock, etc., which are widely used in urban road traffic statistics, roadside parking systems, shared parking and other fields. The Mb wireless geomagnetic parking position detector adopts dual-mode detection technology, and the precision is leading in the industry. Especially the complex application scenarios can reduce the false positive rate by 99.9%. The shared parking lock is based on the cloud platform technology architecture system design, which can realize people and vehicles. The parking space and the parking lot operator are perfectly interactive. The user can remotely realize the monitoring, management, authorized use and settlement of the parking space remotely anytime and anywhere through the cloud platform or app, and promote the development of unattended and shared parking. trend.