Application of Inductive Switch in Public Places Lighting

The energy-saving self-extinguishing switch is increasingly used in the lighting of residential public parts. This paper makes a comparative analysis of several commonly used self-extinguishing switches. On this basis, the paper summarizes the characteristics of the new inductive self-extinguishing switch, the matters needing attention and the existing problems in the design and installation, and points out the inductive switch. It is a promising product in the self-extinguishing switch.

Switch Induction Lighting Table 1 Comparison of several self-extinguishing switches Price performance Market brand use effect Installed command life Sound control Low generality and chaos gradually deteriorated Convenient touch Good stability Inconvenient operation Easy to operate Infrared high quality is not very convenient The induction is better, less convenient and more convenient. 1 Overview With the continuous improvement of the social economy, the people's living standards have gradually improved, and the relevant national standards and standards are constantly improving and strengthening. The latest version of the "Residential Building Design Code" GB50096-1999 in Section 6.5.3 clearly stipulates that artificial lighting should be provided in the public part of the house. Except for the elevator hall and emergency lighting of high-rise residential buildings, the energy-saving self-extinguishing switch should be adopted. The main purpose of using the self-extinguishing switch is to improve people's living environment and energy saving. According to the national standard GB1061, the average life expectancy of a high-quality light bulb is about 1000 hours under normal use, while the ordinary light bulb is shorter. If the corridor is a nighttime light, every year In addition to the cost of light bulb loss, there must be more than 100 kilowatts of electricity loss, plus the labor cost of replacing the light bulb, each lamp consumes about 100 yuan per year, which not only wastes a lot of energy but also increases the maintenance workload due to frequent replacement of the light bulb. Sometimes, some corridors are not repaired and managed in time. Many stairs are dark at night, which brings a lot of inconvenience to people's lives. This is also very inconsistent with the modern urban civilization. To fundamentally change this phenomenon, it is necessary to adopt a self-extinguishing switch. Achieve energy saving, convenience and civilization.

At present, the self-extinguishing switches commonly found in the market mainly include sound and light control switches, touch delay switches, infrared switches, and inductive switches. After years of use, the characteristics, performance and price of the above various switches are compared, as shown in Table 1.

Among them, the sound and light control market has a wide variety, and the price ranges from a few yuan to more than 20 yuan. Since the sound sensor itself is mechanical, it is susceptible to mechanical fatigue, and it is difficult to overcome the phenomenon that the sensitivity is better at the initial installation and the sensitivity is reduced at the later stage. Therefore, in the later stage of use, the sound and light control lamp can only be triggered by artificial noise. The night depth has the effect of affecting sleep. In addition, the sound and light control is easy to respond to all the loud sounds of nature (such as thunder, car horn, car When the engine sounds, the electric drill sound when decorating the room, etc.), there are more misoperations. Some households have a great influence on the switch when the house is renovated. Some people have not damaged the switch. Due to the low price and low quality of the sound and light control switch mixed market, the user is given the impression that the electronic switch has a short life and is not reliable. Infrared switches, high price is difficult to popularize, anti-interference ability is poor, and touch type is not only vulnerable to damage, unsafe, but also the ills of infectious bacteria, it is difficult to apply in public places, especially in complex places such as hospitals. Therefore, in order to really use the self-extinguishing switch to improve people's living conditions, it is necessary to find a product that is truly efficient, energy-saving, convenient for lighting, stable in performance, durable, and reasonably priced in the market. This day does not light up, this basic function. According to the experience and experience of the human body motion sensor switch produced by a company in Chongqing in recent years, the basic application of the sensor switch is analyzed and summarized.

2 Inductive Switch 2.1 Basic Principle The inductive switch is developed according to the principle of Doppler effect. When the human body moves within a certain range, the high-frequency reflected signal emitted by the sensing switch is connected to detect, and then it is determined whether there is anyone nearby. When the human body enters the detection area, the detected signal strength is large enough and is shaped and amplified to control the conduction of the two-way thyristor. It is judged by the light control element whether it is necessary to turn on the light, and finally the automatic control lamp is turned off. The frequency of high-frequency oscillation is mostly between 7001000MHZ, and the transmission power is less than 1mW, which has no effect on human health.

The use of new high-frequency electronic components overcomes the inconvenience of the early inductive switch and the disadvantage of being susceptible to interference, thereby making the inductive switch more practical. At present, the main types of inductive switches produced by the company are lamp holder type, ceiling type 'integrated type and split type three. The lamp holder switch is made by adding an electronic part to the bakelite screw flat lamp holder. The volume is exactly the same as that of the ordinary screw socket. The installation method is exactly the same as the screw socket; the ceiling integrated type is the switch type. The lamp holder is mounted with a 9-inch ceiling lamp, and its installation is identical to that of a normal ceiling lamp. The split type separates the control section (80x 30) from the normal lamp and can be installed in a special place.

2.2 Problems to be paid attention to in design We have used induction switches in multi-storey residential buildings, high-rise residential buildings, office corridors and other places. After practical application, its performance is significantly better than the sound and light control switch. However, due to the limitations of inductive detection, the following issues should be noted when designing. 1) The influence of the beam on the detection distance. In general, in multi-story homes, the beam has little effect regardless of whether the sensor switch is ceiling mounted or suction wall mounted. The general sensing distance of the technical indicators is not less than 5 meters. The actual sensing distance during installation is often close to 7 meters. However, in high-rise residential buildings, the lintels are generally high, which easily blocks electromagnetic waves and significantly reduces the detection distance. Therefore, it is recommended to use suction walls. Installation method. For single-run stairs, ceiling mounting is recommended, but the installation location is better on the centerline. For places with a floor height of more than 5 meters or less than 2 meters, it is recommended not to use this switch, so as not to affect its performance; 2) antenna direction. When installed, the antenna is more directional. Usually the antenna should be perpendicular to the direction of motion of the human body to reduce interference and improve sensitivity. At the end of the design, it must be submitted to Party A in strict accordance with the design position 34 and refer to the instructions; 3) Power issues. The best choice for a double-running stair bulb is 15 or 25 watts. For a single-run staircase, it is best to choose a 25-watt or 40-watt bulb. For better exterior decoration, it is best to use ceiling lamps, for ordinary decoration, use ordinary bare heads; 4) Switch problems. In theory, the choice of such a switch lamp holder does not require a switch, but in the actual installation process, due to the live installation, there are individual lamp holders damaged. The reason for the damage detected by the factory is that the thyristor is overloaded, that is to say, It is better to replace the bulb and repair it later. It is best to install the switch.

2.3 Installation and management of the inductive switch Scientific installation of the inductive switch can achieve the best performance. When selecting in a new building, install it as much as possible according to the design requirements and the manufacturer's instructions. If the relevant factors are not taken into account in the design, it will be changed according to the actual situation. It is best to install it at the end of the project, which is convenient for debugging and preventing damage or loss of the sensor switch. After the installation is completed, it is advisable to contact the after-sales service department of the factory in time. Generally, such products have a warranty period of six months to one year. When using in an old building, first understand the old building. For a room with a height of more than 5 meters and less than 2 meters, it is best to use a split type sensor switch. In order to facilitate management and reduce the number of replacement lamps, it is best to use an incandescent lamp of superior quality.

The management of this product is basically the same as that of the general sound and light control switch. Usually, it is necessary to observe whether there is a phenomenon of long-term and shock, and if so, consult with the factory about the installation and maintenance methods, and replace the relevant components in time. In addition, be careful not to use electronic energy-saving lamps and high-power bulbs with a power of more than 60 watts. Since this product is expensive, pay attention to the problem of loss.

3 Inductive switch application in other places Inductive switch is currently used in other places besides being used in construction. At present, most of the duty room is still on duty to communicate and defend. If a split-type sensor switch is installed at the door of the duty room, the switch is equipped with a bell or buzzer. When the person is close, the buzzer will automatically sound, and the alarm and prompt will be reached. The function. Also available for home renovation. If an inductive switch is installed in the hallway of the indoor aisle and the toilet during the interior decoration, the light can be automatically turned on and off at night for the convenience of patients, children and the elderly. It can also be installed in the toilet, but the delay time should be longer type, and pay attention to the problem that the ventilation fan motor interferes with it.

The use of large-scale electric pick-up 鲂 中 中 中 工程 工程 工程 工程 工程 工程 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合 结合A comparison was made.

Big pear motor full-pressure start-up step-down starting mode starting device 1 motor classification and characteristics Motor is the most commonly used electrical equipment in industrial enterprises, its role is to convert electrical energy into mechanical energy. As a power machine, the motor has the advantages of simple structure, convenient operation, low price, high efficiency and the like. Therefore, it is widely used in various aspects. In factories and mines, the electric energy consumed by the electric motor accounts for more than 50% of the total energy consumption. It can be seen that the electric motor is one of the important equipments to ensure the production of factories and mines.

There are many types of electric motors, including AC motors and DC motors. The alternating current motor is divided into a synchronous motor and an asynchronous motor (ie, an induction motor); wherein the asynchronous motor is divided into a squirrel cage motor and a wound motor.

The electromagnetic structure of the motor consists of a stator part and a rotor part. A stator with a fixed polarity is mounted on the stator of the DC motor, and the DC power source is connected to the rotor (armature) via a commutator (commutator), and the rotor current interacts with the stator magnetic field to rotate the rotor. The DC motor has a complicated structure and low reliability, but has good speed regulation performance and starting performance. DC motors are mainly used in equipment such as electric motors, rolling mills, large and medium-sized hoists, etc. with high speed or starting requirements.

The stator (armature) of the AC motor is equipped with different types of AC windings, and when the AC power is turned on, a rotating magnetic field is generated. The rotor of the synchronous motor is equipped with a magnetic field with a fixed polarity. After the stator is connected to the AC power supply, the rotor starts to rotate. When the speed reaches 95% of the synchronous speed (rotating magnetic field speed), the rotor is connected to the DC power supply via the slip ring, and the motor enters the synchronous state. Running. The structure of the synchronous motor is also complicated, but the synchronous motor can change the phase of the stator current through the adjustment of the excitation current, so that the synchronous motor becomes a capacitive load, so the inter-step motor can provide reactive power to the grid. Synchronous electric 4 conclusion After nearly two years of use in Chongqing Xinqiao Hospital, Daping Hospital, Baiyun Building and Jinguoyuan property, the inductive switch products have superior performance and can fully meet the energy saving and convenience requirements required in use. As an inductive switch for the controller for lighting, it is completely energy-saving. It overcomes the shortcomings of other various switches. As an electronic product that uses new technology, it has no radiation damage to the human body, and does not interfere with television, communication, and broadcasting, and does not generate subharmonics for the power grid. Pollution" Therefore, the sensor switch should be designed for the ultimate planning of lighting systems that provide efficiency, comfort, safety, environmental benefits and improved work efficiency and physical and mental health. Green lighting is one of the ideal "members" in the "hardware" of system engineering.

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