From outdoor and pet-friendly digital motion detectors to analogue motion detectors, the Paradox series of motion detectors combines advanced features and patented technologies to provide a high level of detection and false alarm prevention. Whatever the application, there’s a Paradox motion detector that will suit your needs and surpass your expectations.
Developed for high-security applications, our digital motion detectors perform direct analog to digital conversion of the PIR sensor’s signal using a powerful, high-speed microprocessor-based digital IC. A software-driven process then converts, amplifies and processes the sensor’s low-level signal in the digital domain without any analog circuitry (no saturation, no loss of data and no noise). This unique technology provides increased accuracy, reliability and superior false alarm immunity.
Our patented Auto Pulse Signal Processing transforms the signal energy to a pulse output to determine if the progression of the detected occurrence corresponds to an alarm condition. Energy from the signals are measured and stored in memory until a minimum level is reached. The processor then rejects signals that do not meet its required specifications for generating an alarm.
100% Digital Motion Detection (Patented)
100% Digital Detection:
Completely software-driven, true 100% digital motion detection completely converts, amplifies and processes the sensor’s low-level signal in the digital domain without any analog circuitry. The sensor’s entire signal is processed without any saturation or noise, which provides increased accuracy, reliability and superior false alarm immunity.
Conventional “Digital” Motion Detection:
Conventional “digital” motion detectors have an analog stage that is used to amplify the sensor’s signal. The analog circuitry causes most of the signal to be lost due to the saturation of the amplifier. Therefore, there is no real benefit in adding a processor to an analog motion detector since most of the signal is lost in the amplifier stage and there is no data to process over a conventional analog decision-making circuit.
Digital Shield Algorithm
Shield is a software algorithm that is comprised of three major parts:
Real Time DSP (Digital Signal Processing): The DSP portion of the software digitally amplifies and filters the sensor signal in real time. Unlike analog filtering, digital filters are accurate, unaffected by temperature levels, have no phase distortion and do not add cost or hardware components. The result is a clean and accurate digital signal with maximum S/N ratio. Movement Analysis: Movement generates a unique sequence of signals. For each signal, Shield measures and calculates the signal’s parameters (amplitude, duration, peak level, polarity, rise time and shape) in real time and then stores them in memory. Each signal is compared with a reference bank of movement and non-movement signals. If the signal does not meet movement criteria, it is immediately rejected. RFI/EMI Protection: The high dynamic range of the digital samples and high sampling rate allow high level RF signals to be recorded without clipping or any other distortion. Shield recognizes RFI/EMI conditions and effectively distinguishes interference signals from movement signals without compromising the detection of movement.
Auto Pulse Signal Processing (Patented)
Auto Pulse Signal Processing (APSP) measures energy from each detected signal and stores it in memory. To generate an alarm, the memory must reach a required minimum level. Thus, in the presence of high-level signals (very low risk of false alarms) the detector immediately generates an alarm, functioning as a “non-pulse count” detector, while low level signals (presenting a high risk of false alarms) will cause the detector to automatically switch to a very high pulse count mode – resulting in excellent protection against false alarms. Pulse counting rate depends on signal energy levels and can go much higher for RFI signals.
Automatic Temperature Compensation (ATC)
ATC automatically adjusts the motion detector’s sensitivity according to the difference between the room temperature and body temperature. This helps maintain the same operation in its operational temperature range without any loss of coverage or decrease in false alarm rejection.
Interlock Sensor Geometry (Patented)
The Interlock Sensor Geometry’s (ISG) interlaced pattern provides greater coverage over longer distances more effectively than conventional sensors. Standard quad detectors lose effectiveness as they reach their maximum coverage since a human body will not cross both detector beams at the same time.
Dual Edge Processing (Entry and Exit Analysis)
Dual edge processing separates the entry and exit signals so each signal must reach the required level. If the entry and exit signals do not reach required energy levels, an alarm is not generated thus dramatically increasing false alarm immunity. Single edge processing (found in most PIRs) adds the entry and exit signals until the required energy levels are reached before an alarm is generated.
Dual Opposed Detection (DOD)
Compares the entry and exit signals’ polarity. Only movement signals will generate opposed polarity signals, which will be processed by the software. Any interference signals will generate same polarity signals, which will be rejected by the software providing unmatched RFI and EMI immunity.