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PRIAUTO Introduces Its Next-Generation Child Presence Detection Surrogates
Created on 05.24
12 Programmable Respiration Modes, Multi-Modal Vital-Sign Simulation, and Configurable In-Cabin Child Safety Scenarios
As intelligent cabin sensing continues to evolve, Child Presence Detection, or CPD, is becoming a critical safety function for next-generation vehicles. Driven by emerging requirements from Euro NCAP, ASEAN NCAP, C-NCAP, i-VISTA, ISO-related activities, and global in-cabin safety programs, PRIAUTO continues to upgrade its next-generation CPD surrogate platform to support more realistic, repeatable, and programmable validation of child detection systems.
The PRIAUTO CPD surrogate family covers newborn, 1-year-old, 3-year-old, and 6-year-old children, addressing the key age groups associated with in-cabin child safety risks. Designed for mmWave radar, UWB, Wi-Fi sensing, 4D imaging radar, vision, infrared, and thermal imaging systems, the platform provides controllable respiration, heartbeat, body temperature, acoustic, eye movement, posture, occlusion, and complex in-cabin scenario simulation capabilities.
It can be used for child-left-behind detection, intelligent cabin occupant sensing, vital-sign detection algorithm development, multi-sensor fusion validation, and standardized CPD evaluation.
Respiration Simulation Upgraded: From Fixed Breathing to Programmable Vital-Sign Sequences
The core highlight of this upgrade is the enhanced respiration control system. The CPD surrogate now supports 12 programmable respiration modes, enabling a broader range of child-like breathing behaviors, including quiet sleep, weak breathing, deep breathing, rapid breathing, respiratory rhythm variation, breath-to-breath fluctuation, occasional abnormal breaths, short-term apnea, and complex non-sinusoidal breathing waveforms.
The upgraded respiration engine supports the following 12 modes:
- Constant-frequency and constant-amplitude breathing
- Fixed breathing rate with increasing amplitude
- Fixed amplitude with increasing breathing rate
- Fixed breathing rate with amplitude increasing and then decreasing
- Fixed amplitude with breathing rate increasing and then decreasing
- Fixed breathing rate with randomly fluctuating amplitude
- Fixed amplitude with randomly fluctuating breathing rate
- Random variation of both breathing rate and amplitude within defined limits
- Occasional random breaths inserted during normal breathing
- Occasional breathing pauses inserted during normal breathing, with adjustable pause frequency
- Asymmetric tidal breathing
- Trapezoidal / platform waveform breathing
With these 12 modes, the PRIAUTO CPD surrogate is no longer a simple fixed-pattern breathing dummy. It becomes a programmable child vital-sign simulation platform capable of generating dynamic respiration sequences with physiologically meaningful temporal characteristics. By configuring frequency, amplitude, phase, pause duration, random fluctuation limits, and task sequences, the surrogate can support algorithm development, training, edge-case validation, and robustness testing under more realistic child-like conditions.
Multi-Modal Vital-Sign Fidelity: Respiration, Heartbeat, Micro-Doppler, Temperature, and Acoustic Cues
The next-generation CPD surrogate does not simply reproduce visible chest or abdominal motion. It can also be equipped with heartbeat micro-motion, body temperature control, acoustic simulation, eye movement, and blinking control modules, forming a comprehensive test object for multi-modal intelligent cabin systems.
For mmWave radar, 4D imaging radar, UWB, and Wi-Fi sensing systems, the difference between a static object and a living child often lies in subtle periodic motion, respiration rhythm, heartbeat micro-motion, radar phase modulation, and micro-Doppler response. Therefore, a CPD surrogate must not only look like a child, but also provide measurable, controllable, and repeatable vital-sign features at the sensor level.
The radar scattering characteristics of the PRIAUTO CPD surrogate are engineered and calibrated based on real child target features, providing representative child RCS responses for in-cabin sensing validation. The platform can be adapted to 24 GHz, 60 GHz, 77 GHz, and 140 GHz mmWave radar systems, as well as UWB, Wi-Fi sensing, and 4D imaging radar technologies, enabling validation of weak vital-sign detection and complex in-cabin sensing performance.
Configurable In-Cabin Scenarios: From a Single Surrogate to Complete CPD Test Conditions
Real-world child-left-behind scenarios are rarely simple cases where a child is seated upright, uncovered, and breathing steadily. Vehicle cabins involve posture variation, occlusion, covering, spatial position, lighting, temperature, and multi-object interference. To address these conditions, the next-generation PRIAUTO CPD surrogate supports a wide range of scenario configurations, including:
- Forward-facing child seat configurations;
- Rear-facing child seat configurations;
- Child lying on the rear seat;
- Curled, side-lying, or sleeping postures;
- Child located in the rear footwell area;
- Child partially covered by a blanket, clothing, or sunshade;
- Child partially occluded by a child seat, seat belt, or interior structure;
- Multi-target, multi-posture, and multi-occlusion scenarios;
- Long-duration unattended test scenarios;
- Automated multi-task test sequences.
Test sequences can be configured according to specific validation needs. For example, a test may begin with constant breathing, switch to randomized breathing, enter a short-term apnea segment, and then add acoustic, thermal, or eye-movement cues. This enables the creation of dynamic CPD test conditions that are closer to real child-left-behind risk scenarios.
Optional Advanced Modules: Blinking, Temperature, Acoustic Simulation, Replaceable Skin, and Hairstyle Customization
To support high-level CPD testing and multi-modal intelligent cabin validation, the PRIAUTO / IVSAFE CPD surrogate offers multiple optional extension modules.
Optional eye-gaze and blinking control
Supports controllable eye behavior, gaze direction, and blinking, enabling validation of RGB cameras, infrared cameras, occupant monitoring systems, in-cabin monitoring systems, and vision-fusion CPD algorithms.
Optional acoustic simulation
Supports infant crying, child crying, distress calls, help-seeking sounds, and subtle movement sounds, enabling validation of microphone-array systems, audio-based CPD detection, and multi-modal fusion strategies.
Optional body temperature control
Supports simulated child body surface temperature for thermal imaging, infrared sensing, and radar-plus-thermal sensor fusion, especially for hot-cabin child-left-behind detection and multi-modal vital-sign assessment.
Optional replaceable skin
Supports different skin tones, surface materials, visual reflectance, thermal radiation characteristics, and sensor response configurations to represent different regional, demographic, and sensing conditions.
Optional replaceable hairstyle
Supports different hair appearances, head profiles, and visual occlusion characteristics, helping validate the robustness of vision-based and sensor-fusion algorithms under realistic child appearance variations.
Optional occlusion and covering accessories
Can be configured with blankets, clothing, child seats, seat belts, sunshades, and other in-cabin accessories to construct realistic child-left-behind and partially occluded detection scenarios.
Age-Specific Surrogate Family: Newborn, 1-Year-Old, 3-Year-Old, and 6-Year-Old
The PRIAUTO CPD surrogate family provides coverage for children from 0 to 6 years old, including newborn, 1-year-old, 3-year-old, and 6-year-old models. Each age-specific surrogate can be designed with corresponding body dimensions, body proportions, posture characteristics, motion degrees of freedom, respiration parameters, heartbeat parameters, visual appearance, radar scattering features, and scenario compatibility.
For younger children, the design emphasizes weak breathing, small thoracoabdominal motion, temperature simulation, and highly occluded scenarios. For 3-year-old and 6-year-old models, additional head, limb, and posture variations can be introduced to support broader validation of child presence detection, occupant classification, and multi-modal perception algorithms in complex cabin environments.
Supporting the Next Generation of Global CPD Testing
As CPD becomes a key function in global vehicle safety assessment, a test surrogate must do more than simply “be detectable.” It must support algorithm development, performance boundary analysis, multi-sensor fusion validation, long-duration testing, and standardized evaluation.
With programmable vital signs, multi-frequency sensor compatibility, child-like RCS matching, configurable in-cabin scenarios, and optional multi-modal interaction modules, the PRIAUTO next-generation CPD surrogate provides a more systematic and engineering-ready foundation for intelligent cabin safety validation.
PRIAUTO will continue to advance child safety testing technologies, intelligent cabin sensing validation, mmWave radar vital-sign simulation, and multi-modal CPD evaluation, helping the global automotive industry build safer, smarter, and more reliable vehicles for children.