Motion and tamper sensitivity explained

Reconeyez detectors are equipped with two sensors - a passive infrared (PIR) motion sensor and a tamper sensor measuring acceleration and angle change. While the detectors have both sensors, then other Reconeyez devices like Bridges, Sirens, and Keypads have just the tamper sensor. Both sensors’ sensitivity can be configured in the Reconeyez cloud Devices menu device detailed view. Make sure to press Synchronize after changing the device settings to sync the changes to the detector.

The motion sensor triggers an alarm in case there is enough infrared radiation detected in the scanned environment, for example from the intruder's body heat. However, such radiation can be emitted or reflected by various other objects and sources in the environment, like sun, wind or rain. In order to filter out any false positive alarms triggered by the environment (like plants moving in the wind or sun reflections) the Reconeyez system is equipped with a server-level algorithm called the Adaptive motion sensitivity (AMS). Essentially, this is an automatic and real-time tool, that will keep the detector motion sensor at the most efficient sensitivity level that corresponds to the surrounding environment.

The tamper sensor triggers and alarm in case the level of acceleration and the angle change as measured by the sensor exceeds the saved thresholds.

Here is how it works.

Motion sensor: Adaptive regime

By default all new Reconeyez detector have the adaptive motion sensitivity enabled. This means that at all times a dedicated algorithm is monitoring the number of received Autodismissed alarms (no valid object detected on the triggered alarm photo). If the number of Autodismissed alarms exceeds the approved thresholds, then the detector motion sensitivity is automatically reduced by one step. Once the number of Autodismissed alarms drops, the algorithm again automatically and gradually restores the maximum sensitivity of the detector motion sensor. This ensures less false triggers during wind storms, heavy rain or specific angle of the sun at certain time of the day without any time consuming manual configuration.

Most of the time, when there are no extreme environmental impacts, detector motion sensor is kept at the maximum sensitivity level by the adpative motion sensitivity algorithm. AMS is an excellent tool for reducing the number of false alarms, reducing battery depletion and time wasted on constant manual configuration of devices.

Motion sensor: manual regime

Users can also adjust the motion sensitivity manually by disabling the adaptive motion sensitivity button. Once it is disbaled, the manual slider (0-100) will appear. By default, it will automatically display the maximum (Very high) value. We advise to be cautious in reducing this parameter as this may result in the reduced ability of the sensor to detect intrusions. Should this be still necessary in edge cases, strict live testing under different environmential circumstances is advised (temperature, detection distance, background movement).

Tamper sensor

Tamper sensor only has a simple manual slider and is by default saved on the Medium (200 milligravities) sensivitity. User can reduce the tamper sensitivity to the Lowest (2000 mg) or increase it to the Highest (1 mg) sensitivity. As a rule, the acceleration sensitivity range of 1- 500 is advised to be used to receive any tamper alarms from the device.

Tamper alarm is triggered when two conditions are met: 1) sufficient acceleration force (mg), 2) angle change of the device. This trigger logic helps to prevent false alarms from rough weather.