Cause analysis and solution of passive infrared detector false alarm
False alarm caused by equipment failure
① Damage failure. Including total performance failure and sudden failure. This kind of failure is usually caused by the damage of components or poor production technology (such as false welding, false welding, etc.).
② Drift fault. It refers to the fault caused by the excessive drift of the components' parameters and the power supply voltage. For example, if the temperature is too high, the resistance value of the resistance resistance will change. In this case, the performance of the device varies from good to bad
False alarm caused by environmental change
(1) The installation of equipment is not firm and often moves to cause false alarm;
(2) to air conditioning and ventilation fan temperature changes cause false alarm;
(3) Guard area door or window is not closed, people or animals after causing false alarm;
(4) When the temperature difference between indoor and outdoor is large, the wind blows the curtain causing false alarm;
(5) Multiple detectors emit signals at the same time, can cause missing reports or interference (only refers to no linear);
⑥ Alarm system for code error to other wireless infrared detectors caused by false alarm equipment performance is good or bad (only refers to the linear).
Solution
(1) Install infrared detectors according to the installation requirements of the instructions;
② Avoid areas with strong temperature difference and air convection;
③ The doors and Windows in the guard area should be closed, and the detectors should be opened normally.
④ Closed doors and Windows or bound curtains;
(5) Reduce the cross-detection range of the prevention area and avoid simultaneously transmitting alarm signals;
① Damage failure. Including total performance failure and sudden failure. This kind of failure is usually caused by the damage of components or poor production technology (such as false welding, false welding, etc.).
② Drift fault. It refers to the fault caused by the excessive drift of the components' parameters and the power supply voltage. For example, if the temperature is too high, the resistance value of the resistance resistance will change. In this case, the performance of the device varies from good to bad
False alarm caused by environmental change
(1) The installation of equipment is not firm and often moves to cause false alarm;
(2) to air conditioning and ventilation fan temperature changes cause false alarm;
(3) Guard area door or window is not closed, people or animals after causing false alarm;
(4) When the temperature difference between indoor and outdoor is large, the wind blows the curtain causing false alarm;
(5) Multiple detectors emit signals at the same time, can cause missing reports or interference (only refers to no linear);
⑥ Alarm system for code error to other wireless infrared detectors caused by false alarm equipment performance is good or bad (only refers to the linear).
Solution
(1) Install infrared detectors according to the installation requirements of the instructions;
② Avoid areas with strong temperature difference and air convection;
③ The doors and Windows in the guard area should be closed, and the detectors should be opened normally.
④ Closed doors and Windows or bound curtains;
(5) Reduce the cross-detection range of the prevention area and avoid simultaneously transmitting alarm signals;
⑥ Fast and accurate code to prevent misrecording information.
