Wireless alarms have many defects and fatal problems, such as:
1) Co-frequency interference: Due to the restrictions of the "Radio Committee", civilian wireless products are mostly "315MHZ and 433MHZ" frequency bands. When multiple wireless detectors are installed in the same household or several adjacent wireless alarm systems with “315MHZ and 433MHZ†in the same frequency band are installed, the same frequency interference will occur, one of them will be triggered, and the alarm host will not be able to receive signals from other detectors and remote controllers. If someone is active at home, and the detector is triggered, then neighbors want to use the remote control to “arm†or “disarm†or have criminals invade their neighbors. Although the detector “alarmsâ€, the control panel will not respond. In another case, if the criminals are more professional and continue to trigger their own remote control or mask to send out the interference signal, the wireless host will not receive the wireless detector alarm signal, and the entire wireless alarm system is in a paralyzed state. This is wireless. The most fatal weaknesses of the alarm system, the more wireless alarm products are installed, the more severe these situations are.
2) Wireless Shielding: The use of "Electronic Wireless Shield" can shield the wireless signal. The wireless alarm system is also paralyzed and cannot work normally.
3) Critical signal: When the distance between the wireless detector and the wireless host is at the “signal critical pointâ€, the battery may be unable to receive the detector signal sometimes because of insufficient battery power or environmental changes. , at this time will produce a missing report.
4) Battery-powered: When the battery is exhausted, manual replacement is needed to increase maintenance costs; due to the professionalism of commissioning and maintenance of the alarm system, it is difficult for the average consumer to replace it, and it is inconvenient for the user to use it. Some manufacturers still do not have a reminder function because the technology is not in place. When the battery power is too low, there is no reminder function, or the reminder function is not paid attention to by the householder. As a result, a thieves cannot enter the wireless detector but can't report the alarm to the owner. In addition, due to battery power, the wireless alarm system can only use wireless infrared detectors with low power consumption and high false alarm rate. Nowadays, many companies have launched wireless dual-channel detectors with 220V power supply. Since 220V cables can be used, it is also possible to use weak wires. This is not a true wireless alarm system, and it still cannot solve the interference problem.
Since the birth of the first wireless telephone (mobile phone) in the world in 1973, nearly fifty years have passed since then, there will still be an embarrassment that there is often no signal, and stability and fixed telephones cannot match. Even the high-tech wireless equipment such as GPS positioning, phased array radar, and wireless satellite communications, which symbolize the highest technology of human beings, will suffer failure when subjected to high-intensity electromagnetic interference in the same frequency domain. Similarly, in security The wireless alarm system appeared in the district for more than ten years. How stable and mature is it? In summary, the wireless anti-theft alarm system is technically congenitally deficient, and the installation of the wired anti-theft alarm system has become a trend and inevitable.
The fatal flaws and many problems in wireless alarm systems can only be used in some projects that fail to implement wired anti-theft alarm system wiring, or in low-prevention requirements, and in some temporary anti-theft alarm projects.
1) Co-frequency interference: Due to the restrictions of the "Radio Committee", civilian wireless products are mostly "315MHZ and 433MHZ" frequency bands. When multiple wireless detectors are installed in the same household or several adjacent wireless alarm systems with “315MHZ and 433MHZ†in the same frequency band are installed, the same frequency interference will occur, one of them will be triggered, and the alarm host will not be able to receive signals from other detectors and remote controllers. If someone is active at home, and the detector is triggered, then neighbors want to use the remote control to “arm†or “disarm†or have criminals invade their neighbors. Although the detector “alarmsâ€, the control panel will not respond. In another case, if the criminals are more professional and continue to trigger their own remote control or mask to send out the interference signal, the wireless host will not receive the wireless detector alarm signal, and the entire wireless alarm system is in a paralyzed state. This is wireless. The most fatal weaknesses of the alarm system, the more wireless alarm products are installed, the more severe these situations are.
2) Wireless Shielding: The use of "Electronic Wireless Shield" can shield the wireless signal. The wireless alarm system is also paralyzed and cannot work normally.
3) Critical signal: When the distance between the wireless detector and the wireless host is at the “signal critical pointâ€, the battery may be unable to receive the detector signal sometimes because of insufficient battery power or environmental changes. , at this time will produce a missing report.
4) Battery-powered: When the battery is exhausted, manual replacement is needed to increase maintenance costs; due to the professionalism of commissioning and maintenance of the alarm system, it is difficult for the average consumer to replace it, and it is inconvenient for the user to use it. Some manufacturers still do not have a reminder function because the technology is not in place. When the battery power is too low, there is no reminder function, or the reminder function is not paid attention to by the householder. As a result, a thieves cannot enter the wireless detector but can't report the alarm to the owner. In addition, due to battery power, the wireless alarm system can only use wireless infrared detectors with low power consumption and high false alarm rate. Nowadays, many companies have launched wireless dual-channel detectors with 220V power supply. Since 220V cables can be used, it is also possible to use weak wires. This is not a true wireless alarm system, and it still cannot solve the interference problem.
Since the birth of the first wireless telephone (mobile phone) in the world in 1973, nearly fifty years have passed since then, there will still be an embarrassment that there is often no signal, and stability and fixed telephones cannot match. Even the high-tech wireless equipment such as GPS positioning, phased array radar, and wireless satellite communications, which symbolize the highest technology of human beings, will suffer failure when subjected to high-intensity electromagnetic interference in the same frequency domain. Similarly, in security The wireless alarm system appeared in the district for more than ten years. How stable and mature is it? In summary, the wireless anti-theft alarm system is technically congenitally deficient, and the installation of the wired anti-theft alarm system has become a trend and inevitable.
The fatal flaws and many problems in wireless alarm systems can only be used in some projects that fail to implement wired anti-theft alarm system wiring, or in low-prevention requirements, and in some temporary anti-theft alarm projects.
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