Since the wireless alarm does not require wiring, it not only saves wire costs, but also has great installation advantages in the renovated house. The biggest drawback of wireless alarms is poor security and easy interference. Like frequency interference, environmental interference. In addition, wireless hosts in China are rarely able to detect the status of wireless detectors and battery life. It should be said that wireless alarms are relatively large. The wireless controllers of international famous brands will adopt multi-frequency communication, two-way communication and other technologies, and the safety and reliability can be greatly improved, but the price will also rise accordingly.
At present, people are still doubtful about the stability of wireless signal transmission. For example, the wireless product transmission is easily affected by lightning, electromagnetic interference, etc., and the stability of the signal is greatly reduced. At present, the development of frequency hopping technology has greatly enhanced wireless. Transmission anti-jamming, when the wireless signal is interfered, it will automatically jump to another channel to ensure the stability of the wireless signal transmission. And the general civilian security is much lower than the requirements of important institutions such as finance, so wireless security products can fully meet the needs of civilian security.
For the stability of wireless signal transmission, reliability and other issues have foreign brands, such as Israel's Agility wireless alarm system has taken corresponding strong measures:
1. Two-way wireless technology, confirmation signal feedback: The traditional wireless detection equipment has a defect, that is, whether the controller has successfully received the alarm signal after the front-end detector detects the alarm sent to the controller. Both parties are not aware of this. . Then, the Agility wireless alarm system's two-way wireless confirmation technology can solve such problems. The front-end detector sends an alarm signal to the controller. When the alarm controller successfully receives the alarm signal, it immediately returns a confirmation signal to the front-end detector to ensure the correct transmission of the alarm signal. It can be said that the two-way wireless confirmation technology is in the alarm product. Rare.
2. Electromagnetic environment and detector status monitoring: With the increasing seriousness of wireless electromagnetic interference, the application environment has become very complex, which also hinders the application of wireless devices. The key issue is that traditional technologies cannot rely on environmental electromagnetic interference and front-end The state of wireless detectors is used to propose corresponding technical solutions, which increases the probability of detectors being affected by environmental electromagnetic interference and weakens the wireless signal strength of the detectors. In addition, the influence of the lack of detector battery power also makes the system unable to work properly. , And affect the effective transmission of alarm information, resulting in detector detection distance becomes shorter, does not work, leakage / false positives and other phenomena. Then Rescor's Agility alarm system is equipped with environmental background noise, wireless detector signal strength, and wireless detector power status detection function. It can visually display the background noise size and detector signal in digital form on the system operation keyboard. Strength and detector energy storage capacity, it will be very convenient for engineering personnel and users to choose the most appropriate installation program, can replace the detector battery in time, so that the alarm system is always in a good working condition, not just become a decoration.
In another example, Honeywell’s 58×× wireless protocol designed for wireless RF 315MHz and 433MHz, as well as GWP wireless protocol based on frequency-modulated spread spectrum technology, can greatly improve the security and bandwidth of signal transmission, and it has only a few powerful ones. The company will have its own agreement.
1. Welding Machines - A welding machine is an essential tool for any welding job. It is used to create a welding arc that melts the metal being joined, allowing it to fuse together.
2. Welding Electrodes - Welding electrodes are metal rods that are used to conduct electricity and create an arc. They are coated with a flux that helps to protect the weld from contamination and oxidation.
3. Welding Wire - Welding wire is used in the MIG welding process to feed the welding arc with a continuous supply of wire. It is available in different thicknesses and materials, such as stainless steel, aluminum, and mild steel.
4. Welding Helmets - Welding helmets are designed to protect the welder's eyes and face from the intense light and heat produced during welding. They come in different styles and designs, including auto-darkening helmets that automatically adjust to the brightness of the welding arc.
5. Welding Gloves - Welding gloves are used to protect the welder's hands from heat, sparks, and other hazards associated with welding. They are made from materials such as leather and Kevlar and come in different sizes and styles.
6. Welding Safety Glasses - Welding safety glasses are designed to protect the welder's eyes from the intense light and UV radiation produced during welding. They are available in different shades and styles.
7. Welding Filler Metals - Welding filler metals are used to add material to the weld joint to create a strong, durable bond. They come in different materials, such as stainless steel, aluminum, and bronze.
8. Welding Clamps - Welding clamps are used to hold the metal being welded in place during the welding process. They come in different sizes and styles, including C-clamps, locking pliers, and magnetic clamps.
9. Welding Flux - Welding flux is used to protect the weld from contamination and oxidation during the welding process. It is available in different types, including powder, paste, and liquid.
10. Welding Gas - Welding gas is used in the TIG and MIG welding processes to shield the welding arc from contamination and oxidation. It is available in different types, including argon, helium, and carbon dioxide.
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