No.: 00111 material: Aluminum specification: 0-5m optional model: uqk-01l the principle of electronic liquid level switch is to detect the liquid level through the electronic probe, and then process the detected signal through the special liquid chip for level detection When the measured liquid reaches the action point, the chip outputs high-level or low-level signal, and then cooperates with the water level controller to control the liquid level No floating ball and reed, no external mechanical action, pollution resistance and durability, not afraid of the influence of floating objects It can be installed at any angle The vertical installation has certain anti - wave function and is suitable for immersion in water for a long time The working voltage is DC 5-24v, which is very safe This method is practical, Level Measuring Controller,Magnetic Control Liquid Level Switch,Liquid Level Control Switch Module,Liquid Level Control Stainless Float Ball Taizhou Jiabo Instrument Technology Co., Ltd. , https://www.taizhoujbcbyq.com
The reporter learned from the Sino-British Optoelectronics Industry Exchange Symposium that Chongqing will select three new tunnel pilot LED lighting. This advanced energy-saving lamp can change with the light outside the tunnel, and the driver does not appear visual black holes or black frames when entering or leaving the tunnel.
I was very annoyed when driving into the tunnel. I always felt that it was dark. Zhang Wuxin, a citizen who didn't get a driver's license for a long time, told reporters. Zhang Wuxin works in a bank in Nanping, lives in Jiangbei District, and drives every day between Nanping and Jiangbei District. The Shihuang Tunnel becomes a hurdle during his commute. When entering the tunnel, he enters a big black hole. It takes a long time for the eyes to adapt. When it is not open for a long time, there is a strong sun shining, and the head is dizzy. He said.
Not only a novice, but many old drivers also often do not see clearly in the tunnel. Huang Shifu, who has been driving a taxi for more than ten years, said that because the vision was not adjusted, he almost hit the front of the car.
In fact, tunnel lighting in Chongqing and even the whole country is not reasonable. Chen Weiming, director of the LED Lighting Industry R&D Alliance, said that when the driver just entered the tunnel during the day, the brightness of the light outside the tunnel was much higher than that inside the tunnel. If the tunnel was long enough, the driver saw a dark hole. This is Black hole phenomenon; if the tunnel is short, a black frame will appear in front of the driver. This phenomenon, which enters the dark tunnel from the bright outside, and the vision can be seen through a certain period of time to see the inside of the tunnel, is called the hysteresis of adaptation.
In addition, in the middle section of the tunnel, due to the accumulation of exhaust gases from the car to form smoke, the light of the car headlights is absorbed and scattered by these smokes, affecting the visibility of the obstacles. The exit of the tunnel is much brighter than the inside of the tunnel, which will cause strong glare to the driver and is prone to car accidents.
Therefore, tunnel lighting is not ordinary street lighting. It should change with the brightness of the light outside the tunnel. For example, when the outside of the tunnel is a large sun, the lighting in the tunnel may be 1000 watts; at night, the tunnel lighting may be as long as 10 watt. Chen Weiming said.
LED lights save electricity compared to ordinary sodium lamps. Why not promote them in large quantities? The price of LED lamps for lighting is 8,000 yuan and 10,000 yuan, while ordinary sodium lamps are 2,000 yuan. Therefore, many tunnels must choose sodium lamps. Chen Weiming said that after investigation, as long as the tunnel is longer than 3 kilometers or the road is longer than 5 kilometers, the price of installing LED lights is similar to that of ordinary sodium lamps, because the corresponding power supply facilities such as cables, distribution boxes and transformers are greatly reduced.
It is reported that the city will choose three new tunnels (the specific tunnel is not determined) to pilot LED lighting, which will be gradually promoted.
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