CPR-FS01 is a high-precision, ultra-thin sensorbased on advanced Force Sensitive Resistor(FSR) film technology. it is specifically designedfor Cardiopulmonary Resuscitation (CPR)quality monitoring and feedback systems.
This sensor can convert the compression forceapplied to the chest into real-time,Accurate chest compression depth data,Providing reliable raw input for core algorithms.
The sensor features a lightweight, flexible,And thin design for easy integration,Into CPR manikins, compression pads,Or handheld feedback devices, and advancedlife support equipment, effectively reducingerrors in compression depth and rate causedby human judgment during emergencies,Thereby increasing the proportion ofhigh-quality CPR delivered.
Core Technical Features
Sensing Principle: High-sensitivity Force Sensitive Resistor (FSR);Resistance decreases non-linearly with increasing applied force.
Structure: Ultra-thin polymer thick-film structure with excellent flexibility and durability. Output: Analog resistive signal output; requires an external signal conditioning circuit(e.g. voltage divider, operational amplifier) for conversion to a standard voltage/current signal.Integration-Friendly: Provides standard pin interfaces and an adhesive backing layer,Supporting quick installation and integration.
1 Chest Compression Depth Sensing Performance
The sensor's force signal, after system calibration and algorithm processing, shall meet the followingperformance indicators related to compression depth, referencing standards from mainstreammedical device manufacturers:
Sensing Range: Corresponds to a compression depth of 1.5 cm to 8.0 cm.
Effective Range: Corresponds to a compression depth of 1.5 cm to 8.0 cm.
Accuracy: Within the effective range, accuracy is +0.5 cm or 10% (whichever is greater).
Resolution: 0.1 cm.
Target Operating Range: According to emergency guidelines, the sensor should accurately monitor therecommended adult compression depth of 5-6 cm.
2 Compression Rate and Recoil Sensing Performance
The following parameters can be calculated from the dynamic force signal output by the sensor:
Rate Range: Capable of monitoring compression rates from 40 to 160 compressions per minute (cpm)
Target Rate: Corresponds to the guideline-recommended 100-120 compressions per minute
Recoil Detection: The sensor can detect when compression force is fully released to a near-zero state,Used to determine whether full chest recoil is achieved, ensuring adequate cardiac pre-filling.
3 Electrical Characteristics
The following are the core electrical parameters of the sensor, with some referencing typical values ofsimilar FSR products:
Initial Resistance (No Load): > 10 MO
Full-Scale Resistance: Can drop to <10 kO when maximum force is applied.
Response Time: <5 ms, ensuring capture of the dynamic process of rapid CPR compressions
Repeatability: <+3.0% (Full Scale).
Power Consumption: Extremely low static power consumption; typical operating current <0.5 mA.
4 Mechanical & Environmental Specifications
Physical Specifications:
Active Sensing Area: Diameter 12.7 mm (standard circular).
Overall Thickness: < 0.3 mm.
Lead Wires: Standard two-core shielded cable, length 100 cm (customizable per customer requirements)
Connector: Optional standard 3-pin connector (e.g. JST) for easy connection/disconnection.
Operating Conditions:
Operating Temperature: 0°C to +50°C.
Operating Humidity: 10% to 95%, non-condensing
Storage Temperature: -30°C to +70°C.
4.1 Mechanical Lifetime
Under conditions simulating standard CPR compressions (depth 5-6 cm, rate 110 cpm),The sensor can withstand >100,000 continuous compression cycles with performance degradation notexceeding 10% of the initial value.
4.2 Regulatory & Standard Compliance (Guidance for Final Device Integration)
As a component for medical electrical equipment, this sensor is designed to assist customers(device manufacturers) in meeting the following primary international and regional regulatoryrequirements. After integrating this sensor into the final device, customers must performwhole-device certification:
Electrical Safety: IEC 60601-1/ EN 60601-1(General requirements for basic safety and essential performance of medical electrical equipment).
Electromagnetic Compatibility (EMC): IEC 60601-1-2/YY 0505-2012(Requirements and tests for EMC of medical electrical equipment).
Environmental Testing: It is recommended that the final device be tested per climate environmentGroup Il and mechanical environment Group II requirements in standards such as GB/T 14710 orEquivalent (e.g., IEC 60068-2 series), including high/low temperature, damp heat, vibration, impact,And transportation tests.
RoHS: The product complies with EU RoHS Directive 2011/65/EU and its amendments,Restricting the use of hazardous substances.
Typical Application Circuit
The sensor requires an external simple signal conditioning circuit.
Using a series load resistor (RL) to convert the sensor's resistance changeinto a voltage output (Vout) is recommended.
The value of RL (typically between 10 kO and 100 kO) should be optimized based on the customer'ssystem-specific force-to-voltage conversion relationship, ADC range, and desired sensitivity.
Dongguan Zhongman Industrial Co., Ltd.
EN
