2003, Issue 4, Category: Electronic Products and Devices
The new house was equipped with aluminum alloy sliding doors, and finally had the opportunity to design a set of automatic doors for himself. The human body detection part adopts the transmission and reception technology of the remote control of household appliances, which is not affected by the ambient light.
Figure 1 is the infrared receiver and motor drive circuit. When there is no one, the infrared receiver normally receives the infrared beam from the other side. Use a 60mm long guide tube (Figure 3) that is just inserted into the infrared emission tube to be fixed in parallel on the wall, the height is appropriate, and it is aligned with the receiver on the opposite side. In this way, the emitted infrared light is a beam, which is not easy to interfere with another receiver. The specific installation method is shown in Figure 4. After amplifying and filtering by BG6, BG7, CR and so on, the low level is output. At this time, BG5 is turned off, and BG2 and BG3 are turned on to perform the door closing action. When a person walks to the door, the infrared light is blocked, BG7 outputs a high level to drive the BG1 and BG4 through a limit switch to perform the door opening action, and the other way drives the BG5 through R1 to shut off the BG2, and the threshold is opened when the door opens to the specified position The position switch is turned off, so that the motor does not continue to run. When the person leaves, BG7 no longer outputs a high level, and performs a door-closing action after a delay of three seconds via capacitor C1.
The transmitter circuit can be modified with the finished product of the TV remote control (Figure 2). Disconnect the original transmitter tube and connect it to the dedicated transmitter that has been prepared. The two transmitters are connected in parallel and pay attention to the polarity. Then find a suitable button to short-circuit it and let it emit all the time, preferably the "screen display" button, in order not to interfere with the TV that may be in the radiation area. The transmit power is adjusted by RW, as long as it can be received.
Selection of main components: The four power tubes used in the motor drive circuit are IRF9540 / P type / 100V / 19A and IRF540 / N type / 100V / 28A field effect tube, because it is driven by voltage and consumes almost no driving power. Its internal resistance is small, the temperature rise is very small, you can install them on a small aluminum plate, and pay attention to insulation. The motor can go to the auto parts store to buy a 12V wiper motor, remove its power arm, install a four-stroke motorcycle engine gear, connect it with a few small chains, and then use a steel plate as a bracket to fix it on the door. The specific installation method is shown in Figure 5.
In order to prevent the power outage from affecting the normal use of the door, I designed a transformer to step down with a 12V battery. The main circuit is powered by 12V, which is isolated from the mains and the safety is improved.
Jiangsu Qian Zhengbing
Three anti-light means: waterproof, dustproof, anti-corrosion of the three anti. The use of special anti-oxidation anti-corrosion materials and silicone seals to achieve the protection requirements of lamps. This lamp on the circuit control board for anti-corrosion, waterproof, anti-oxidation treatment, for the electrical box sealed cooling characteristics of the weak, intelligent temperature control three anti-lamp dedicated working circuit, reducing the power inverter operating temperature, The double insulation of the connector ensures that the circuit is safe and reliable. According to the actual working environment of three anti-lights, the surface of the protective equipment for nano-spray moisture-proof anti-corrosion treatment, put an end to the dust and moisture into.
LED Tri-Proof Light,Tube LED Tri-Proof Light,Industrial LED Tri-Proof Light,Ip65 LED Tri-Proof Light
Shenzhen Ri Yue Guang Hua Technology Co., Ltd. , https://www.ledlightinside.com