Wrist-worn Transmitter Pattern Recognition for Pool Alarm Detection
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Solution Overview
Problem
Existing water monitoring systems for swimming pools and beaches are inefficient due to signal interference, difficulty in identifying distress signals, and inability to prevent accidents in unmonitored areas or among non-swimmers, leading to delayed rescue operations and increased risk of drowning.
Innovation Solution
A wrist-worn control unit with a sensor device, analysis device, and transmitter that emits a unique signal pattern upon detecting an emergency situation, such as prolonged water depth or motionlessness, which is received by devices above the water to trigger an alarm, minimizing false alarms and interference through specific signal characteristics and activation only when submerged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acoustic signals are transmitted underwater to trigger alarms, then distress signals can be detected, but signal interference from various sources makes it difficult to positively identify distress signals
Solution Approach 1:
The transmitter emits acoustic signals in periodic bursts rather than continuous transmission. The signal is sent in repeated cycles with specific timing patterns, allowing receivers to distinguish between periodic distress signals and random interference through temporal pattern recognition
Solution Approach 2:
The system uses frequency modulation to vary the acoustic signal characteristics. Different frequency ranges and spectral patterns are employed to encode distress signals, making them distinguishable from background noise through frequency analysis rather than relying on signal strength alone
2Loss of time
If transmitters transmit signals continuously, then distress signals can be detected quickly, but the time available for rescue operations is shortened due to delayed recognition of emergency situations
Solution Approach 1:
The system performs preliminary analysis of signal patterns before triggering alarms. Receivers pre-process incoming signals to identify characteristic distress patterns, and transmitters send preliminary test signals that help establish baseline conditions before actual emergencies occur
Solution Approach 2:
The system implements feedback loops where receivers continuously monitor signal patterns and provide feedback to transmitters. When distress patterns are detected, the receiver sends feedback signals that trigger immediate alarm activation, creating a closed-loop system that reduces detection delays
3Adaptability or versatility
If a plurality of transmitters are used to monitor multiple swimmers, then more persons can be monitored, but confusion arises as to which transmitter sent the alarm signal
Solution Approach 1:
The monitoring area is divided into multiple zones with receivers positioned at different locations. Each transmitter's signal is spatially segmented and assigned to specific receiver zones, allowing the system to identify which transmitter sent a signal based on which receiver detected it first or with strongest signal strength
Solution Approach 2:
The system introduces intermediate identification signals that carry transmitter-specific information. Each transmitter embeds its unique identifier in the acoustic signal through coded patterns or frequency signatures, allowing receivers to decode and identify the source transmitter without confusion
Data Source
AI summary
A device is provided for monitoring waters, particularly swimming pools, including at least one control unit assigned to one person which includes at least one sensor device, one analysis device and one transmitter; at least one receiving device disposed within the waters; at least one transmission device which is signal-connected to the receiving device; and at least one display unit which is signal-connected to the transmitter. The transmitter is designed such that it emits signals of a predetermined pattern in the event of an alarm, and the receiving device is designed such that it recognizes a case of alarm based on the predetermined pattern of the signal and emits an alarm signal to at least one display unit.