With the development of the society and the progress of the times, people are paying more and more attention to issues concerning their own life safety and personal property safety. The continuous innovation of science and technology has also brought people more and more safety precautions. At present, more and more applications are based on infrared alarm technology. The radio digital FM voice infrared wall to be described in this article is based on infrared alarm technology.
Although there are various kinds of infrared walls on the market at present, the functions are generally relatively simple, and only detection output and alarms are performed, and there are also certain defects in stability and anti-interference. In particular, false alarms have always been the security industry. A difficult problem, whoever solves this problem first then he has an advantage.
After careful investigation and in-depth analysis of the false-positive phenomenon of the infrared wall, it was found that the causes of false alarms mainly came from factors such as electromagnetic interference, sunlight, wind, strong light, and small animals such as flying birds. How to maximize the avoidance of these interferences is the key.
By modifying the design several times and conducting multiple experiments, the following summarizes some techniques that can effectively avoid false positives:
(1) Work in a shoot-to-shot mode so that the sensitivity of the infrared wall can be enhanced;
(2) Using digital infrared signal pulse synchronization ultra-stable modulation transmission and reception, built-in automatic adjustment of light filtering system, can be affected by strong light or automotive lighting;
(3) using a specific signal filter circuit design, so that it can better filter out useful signals and filter out interference signals;
(4) The use of signal coding modulation, the analog signal is converted to digital signals, can reduce the distortion of the analog signal in the transmission process;
(5) Using multiple authentication methods, multiple modes can make the alarm more accurate and reduce false alarms;
(6) Human body-specific radiation information identification technology is used to judge and react only to the human body. This can greatly increase the accuracy of alarms and effectively resolve the occurrence of false positives.
The following design schemes are adopted for the radio digital FM voice infrared wall: MCU micro-processing system, pulsed synchronous ultra-stable modulation transmission and reception with digital infrared signal, automatic light filtering system, NUFT filter circuit design and convection The working methods and other technical means. With low operating power consumption, current and other characteristics.
Digital FM voice infrared wall function works:
Indirect digital FM voice infrared wall technical indicators:
(1) Alarm time triggering time <50ms;
(2) Detection distance: 200 meters long distance reception;
(3) Working voltage 12V;
(4) Working current 110mA;
(5) Operating temperature -40 °C ~ 60 °C;
The radio digital FM voice infrared wall has the following functions:
(1) Working in a shoot-in mode can enhance the sensitivity of the infrared wall;
(2) Infrared parallel emission and parallel receiving focus, NUFT filter circuit design, can effectively avoid wall and other reflective interference;
(3) The use of digital infrared signal pulse synchronization ultra-stable modulation transmission and reception, built-in automatic adjustment of light filtering system, you can avoid being affected by strong light or automotive lighting;
(4) Match the wireless remote controller to realize non-contact operation and long-distance operation;
(5) With self-service voice prompt function, users can input their own prompt voice according to actual needs;
(6) AGC type automatic gain circuit automatically adjusts the degree of sensitivity control to work in rain, fog, snow and other adverse weather conditions;
(7) Lightning strike circuit design with rain cover design;
(8) Multi-lingual voice prompts can be made;
(9) Eight-level high-brightness indicator light is used to achieve precise focusing, and 360° adjustable unique mounting brackets are available for calibration installation under any conditions.
(10) It can be matched with various alarm hosts to do perimeter defense.
(11) It is easy to install and use, indoor and outdoor.
Through careful investigation and in-depth analysis of the phenomenon of false positives and multiple experimental results, this program uses a variety of methods to prevent the occurrence of false positives, so that the radio frequency digital infrared voice wall can greatly increase the accuracy of the alarm. Effectively resolve the occurrence of false positives.
Although there are various kinds of infrared walls on the market at present, the functions are generally relatively simple, and only detection output and alarms are performed, and there are also certain defects in stability and anti-interference. In particular, false alarms have always been the security industry. A difficult problem, whoever solves this problem first then he has an advantage.
After careful investigation and in-depth analysis of the false-positive phenomenon of the infrared wall, it was found that the causes of false alarms mainly came from factors such as electromagnetic interference, sunlight, wind, strong light, and small animals such as flying birds. How to maximize the avoidance of these interferences is the key.
By modifying the design several times and conducting multiple experiments, the following summarizes some techniques that can effectively avoid false positives:
(1) Work in a shoot-to-shot mode so that the sensitivity of the infrared wall can be enhanced;
(2) Using digital infrared signal pulse synchronization ultra-stable modulation transmission and reception, built-in automatic adjustment of light filtering system, can be affected by strong light or automotive lighting;
(3) using a specific signal filter circuit design, so that it can better filter out useful signals and filter out interference signals;
(4) The use of signal coding modulation, the analog signal is converted to digital signals, can reduce the distortion of the analog signal in the transmission process;
(5) Using multiple authentication methods, multiple modes can make the alarm more accurate and reduce false alarms;
(6) Human body-specific radiation information identification technology is used to judge and react only to the human body. This can greatly increase the accuracy of alarms and effectively resolve the occurrence of false positives.
The following design schemes are adopted for the radio digital FM voice infrared wall: MCU micro-processing system, pulsed synchronous ultra-stable modulation transmission and reception with digital infrared signal, automatic light filtering system, NUFT filter circuit design and convection The working methods and other technical means. With low operating power consumption, current and other characteristics.
Digital FM voice infrared wall function works:
Indirect digital FM voice infrared wall technical indicators:
(1) Alarm time triggering time <50ms;
(2) Detection distance: 200 meters long distance reception;
(3) Working voltage 12V;
(4) Working current 110mA;
(5) Operating temperature -40 °C ~ 60 °C;
The radio digital FM voice infrared wall has the following functions:
(1) Working in a shoot-in mode can enhance the sensitivity of the infrared wall;
(2) Infrared parallel emission and parallel receiving focus, NUFT filter circuit design, can effectively avoid wall and other reflective interference;
(3) The use of digital infrared signal pulse synchronization ultra-stable modulation transmission and reception, built-in automatic adjustment of light filtering system, you can avoid being affected by strong light or automotive lighting;
(4) Match the wireless remote controller to realize non-contact operation and long-distance operation;
(5) With self-service voice prompt function, users can input their own prompt voice according to actual needs;
(6) AGC type automatic gain circuit automatically adjusts the degree of sensitivity control to work in rain, fog, snow and other adverse weather conditions;
(7) Lightning strike circuit design with rain cover design;
(8) Multi-lingual voice prompts can be made;
(9) Eight-level high-brightness indicator light is used to achieve precise focusing, and 360° adjustable unique mounting brackets are available for calibration installation under any conditions.
(10) It can be matched with various alarm hosts to do perimeter defense.
(11) It is easy to install and use, indoor and outdoor.
Through careful investigation and in-depth analysis of the phenomenon of false positives and multiple experimental results, this program uses a variety of methods to prevent the occurrence of false positives, so that the radio frequency digital infrared voice wall can greatly increase the accuracy of the alarm. Effectively resolve the occurrence of false positives.
CPVC Butterfly Valve is made by CPVC body with seat EPDM or FPM, wafer type or lug type as per standard DIN, ANSI, JIS, CNS, operated by hand lever, gear operate, Electric Actuator and pneumatic actuator. Size from 2" to 24", working pressure by PN10, temperature from 0 degree to 95 degree. CPVC Butterfly Valve is usually used in chemical industrial for acidic and alkaline medium delivery
Ningbo RMI Plastic Co.,Ltd offer CPVC butterfly valve with specification:
Size range:DN50~DN600 (2 inch ~ 24 inch)
Body materials:CPVC
Seat material:VITON,EPDM
Lug connection: Flange ANSI CL150, JIS10K, DIN PN10
Design pressure:0.2~1.0Mpa (PN2~10 bar)
CPVC Butterfly Valve
CPVC Butterfly Valve,Acid Butterfly Valve,Chloride Butterfly Valve,Butterfly Valve CPVC
Ningbo RMI Plastic Co., Ltd. , https://www.rmiplast.com