Active infrared probe alarm

Infrared probe alarmThere are two types: active and passive. Active infrared alarm, which means the alarm actively emits infrared radiation. When the infrared radiation encounters an obstacle, it will reflect back to the receiving part of the alarm. For example, the automatic door detector DA-303 from TAKEX. One characteristic of the active detector is that if an object remains stationary within the detector range, its alarm state will not change unless the object is removed. The same applies to active infrared detectors. The DA-303 automatic door sensor mentioned earlier, when someone stands still within the detection range, the automatic door will not close until the person leaves the detection area. Unlike passive infrared detectors, which use a "pyroelectric sensor" to sense the ambient temperature, if an object suddenly disrupts the balance, it will sound an alarm. Automatic door sensors made using this principle, such as the TAKEX PS-520E, automatically close the door when someone walks into the middle of the automatic door and stops moving. After reaching the preset delay time, the door will automatically close immediately. Unless this person quickly shakes their hand again to indicate that someone is there.

Installation method

Infrared probe alarmIt is an alarm system composed of an alarm host and an infrared detector. Infrared detectors are weak signal detection devices, so attention should be paid to some details during installation, such as sensitivity and height. How to install a passive infrared detector? Then we must follow the following steps:

1. Yes, that's rightInfrared probe alarmSpecial understanding of the performance of the alarm is essential for its installation;

2. Determine the installation location for the infrared detector, as it is a matter of height;

3. To be rightInfrared probe alarmThe debugging of the device must be careful, and its sensitivity must be properly adjusted. This is the key to installation.

1) Height adjustment: How to adjust the sensitivity of this debugging? The installation height will affect the sensitivity of the detector. The frequency of the cutting area and the dark area will become different depending on the height of the detector.

Environmental adjustment: In addition to height affecting sensitivity, the surrounding environment of the infrared detector can also affect its sensitivity. For example, if the passive infrared detector is facing glass doors and windows, two problems will arise: one is environmental interference outside the doors and windows, and the flow of people and vehicles will affect the detector's judgment of the signal; Another issue is white light interference. The PIR of infrared detectors has a strong suppression function against white light, but this is not * suppression. Therefore, avoiding facing directly at the source of white light can prevent strong light interference.

2) Temperature adjustment:Infrared probe alarmThe induction of passive infrared detectors is closely related to temperature changes. Cold and hot temperatures are likely to cause false alarms in infrared detectors. If it is a low performance detector, air convection in doors and windows can also cause false alarms. Therefore, different sensitivity detectors should be selected according to the temperature changes in the environment, which is a factor to consider when installing infrared alarms.

More aboutActive infrared probe alarmWelcome everyone to continue following our company! It is an alarm system composed of an alarm host and an infrared detector. Infrared detectors are weak signal detection devices, so attention should be paid to some details during installation, such as sensitivity and height.