Litter Box Load-Sensor Monitoring for Early Animal Health Detection

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Solution Overview

Problem

Existing animal health monitoring systems, such as cameras and RFID collars, provide one-dimensional information and require expert interpretation, often failing to detect subtle health issues in pets and disrupting normal behavior, while relying on invasive methods like microchips and specific litter types.

Innovation Solution

An animal monitoring system with multiple load sensors under the litter box, using machine learning classifiers to analyze load data and identify behaviors without cameras or collars, providing early indicators of health conditions like renal, urinary, and mental health issues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If cameras and video recording devices are used to track litter box activity, then basic behavioral information can be captured, but the information remains one-dimensional and requires qualified behaviorist interpretation

Engineering Contradiction:
Improvebehavioral information completenessVSAvoidexpert interpretation requirement
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent segments the monitoring system into multiple independent sensor types (load sensors, moisture sensors, temperature sensors, cameras) that each capture specific aspects of litter box activity. This segmentation allows comprehensive behavioral information to be collected through multiple dimensions while the automated processing system eliminates the need for expert interpretation of each individual data stream.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The monitoring system is designed with multi-functionality, integrating various sensing capabilities (weight measurement, moisture detection, temperature monitoring, visual recording) into a single unified platform. This universal system can detect multiple types of health indicators simultaneously, providing comprehensive behavioral information without requiring separate specialized devices for each function.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If microchips and specific litter types are used for monitoring, then health tracking is enabled, but normal behavior is disrupted and invasive methods are applied

Engineering Contradiction:
Improvehealth tracking accuracyVSAvoidbehavioral disruption
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the monitoring function from invasive elements (microchips, specialized litter) and places it in the environment where the animal already interacts naturally (the litter box). Load sensors and moisture sensors are positioned to detect animal presence and behavior without requiring the animal to wear or ingest any monitoring devices, thereby eliminating behavioral disruption while maintaining reliable health tracking.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The system allows the animal to interact with the monitoring environment in its natural way - entering the litter box for elimination activities. The sensors automatically detect and record the animal's weight, moisture levels, and behavior patterns during these self-service activities, enabling reliable health tracking without interfering with the animal's normal routines or requiring invasive procedures.

Inventive Principle:
Principle #25Self-service

3Loss of information

If visual indicators from litter box use are monitored, then health information can be detected, but symptoms only appear in mid- to late-stages of disease

Engineering Contradiction:
Improvehealth symptom detectionVSAvoiddisease detection timing
Core Design Contradiction:
Loss of informationVSLoss of time

Solution Approach 1:

The system performs preliminary detection of health issues by continuously monitoring subtle changes in litter box parameters (weight variations, moisture levels, temperature, visit frequency) before visible symptoms appear. The sensors detect early deviations from normal patterns, allowing health issues to be identified in initial stages rather than waiting for mid- to late-stage visual indicators.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The monitoring system provides continuous feedback on litter box usage patterns, weight changes, and environmental conditions. This feedback loop allows for real-time detection of abnormal patterns and enables early intervention before symptoms become apparent, addressing the timing issue by providing ongoing data rather than periodic visual assessment.

Inventive Principle:
Principle #23Feedback

4Measurement precision

If multiple load sensors are used to track animal behavior, then detailed behavioral insights are obtained, but device complexity increases

Engineering Contradiction:
Improvebehavioral measurement detailVSAvoidsensor system structure
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines multiple load sensors into a unified monitoring platform that shares common processing and data analysis infrastructure. By merging the sensor inputs and using integrated algorithms to interpret the combined data, the system achieves detailed behavioral measurement precision while managing device complexity through shared components and centralized processing rather than independent analysis of each sensor.

Inventive Principle:
Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system offers detailed behavioral insights, differentiating between animals in multi-cat households and predicting health conditions proactively, minimizing disruption and avoiding invasive methods, while using existing litter types.

Implementation Method 1

individual load sensors of the three or more load sensors are separated from one another and receive pressure input from the platform independent of one another

Methodology Applied
Scientific EffectPressure input detection: Pressure-sensitive Paint

Data Source

PatentEP4358704B1Systems and methods for animal health monitoring
Publication Date: 2025.10.08 SOCIETE DES PRODUITS NESTLE SA
  • EP4358704B1 patent drawingFigure 1A
  • EP4358704B1 patent drawingFigure 1B~1C
  • EP4358704B1 patent drawingFigure 1D~1E

AI summary

The present disclosure provides systems and methods for animal health monitoring. Load data can be obtained from an animal monitoring device including three or more load sensors associated with a platform carrying contained litter thereabove, wherein individual load sensors of the three or more load sensors are separated from one another and receive pressure input from the platform independent of one another, wherein the three or more load sensors individually sample loads at from 2.5 Hz to 110 Hz. An animal behavior property associated with the animal can be recognized if it is determined based on load data that the interaction with the contained litter was due to the animal interaction with the contained litter. The animal behavior property can be classified into an animal classified event using a machine learning classifier.