Smartphone-Linked Grain Moisture Meter for Traceable Capacitive Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Farmers in developing countries lack access to affordable and reliable moisture meters for grains, leading to inconsistent measurements, data manipulation, and limited connectivity with markets, which affects food safety, trade transactions, and market access.
Innovation Solution
A cost-effective grain moisture meter system that decouples the sampling cup from the reader, uses capacitive sensing technology, and connects via Bluetooth to smartphones, enabling data sharing and traceability, with a smartphone app for data logging and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If farmers use traditional subjective methods (biting, feeling, shaking) to measure moisture content, then the measurement process is simple and requires no equipment, but the accuracy and consistency of moisture measurement deteriorates significantly
Solution Approach 1:
The patent replaces mechanical/manual moisture assessment methods (biting, feeling, shaking) with electronic capacitive sensing technology. The moisture meter uses electrical fields to detect moisture content objectively, eliminating the need for subjective human sensory evaluation and providing consistent, accurate measurements.
Solution Approach 2:
The patent introduces a moisture meter as an intermediary device between the farmer and the grain moisture measurement. This device objectively measures moisture content and provides digital readings, serving as a mediator that translates physical moisture properties into quantifiable data without requiring direct human sensory involvement.
2Measurement precision
If farmers purchase expensive portable hand-held moisture meters (about $300), then the measurement accuracy improves, but the cost becomes prohibitive for small and medium holder farmers
Solution Approach 1:
The patent segments the moisture measurement system into separate functional components: a moisture sensor unit and a display/processing unit. This allows the sensor to be shared among multiple farmers while each farmer owns a separate display device, reducing individual cost while maintaining measurement accuracy.
Solution Approach 2:
The patent creates a universal moisture sensor that can measure moisture content across different grain types and can be shared by multiple farmers. The sensor serves multiple users and multiple purposes, reducing the per-farmer cost while maintaining measurement precision through standardized capacitive sensing technology.
3Measurement precision
If farmers use existing moisture meters with LCD displays, then moisture measurement is achieved, but data cannot be easily shared or tracked for remote trading purposes
Solution Approach 1:
The patent replaces manual data transcription from LCD displays to paper with electronic data capture and wireless transmission. The system uses digital communication to automatically transfer moisture measurement data to smartphones or cloud platforms, eliminating manual recording errors and enabling easy data sharing for trade transactions.
Solution Approach 2:
The patent introduces a data communication intermediary (wireless transmission system) that connects the moisture meter to external devices like smartphones or cloud platforms. This intermediary enables automatic data capture, storage, and sharing, facilitating traceability and verification for remote trading partners without requiring manual data entry.
4Quantity of substance
If farmers manually transcribe data from LCD displays to paper, then data can be recorded, but the data becomes prone to manipulation and difficult to track
Solution Approach 1:
The patent replaces manual paper-based data recording with electronic digital data capture and storage. The system automatically captures moisture measurement data in digital format, storing it with timestamps and unique identifiers, which prevents manipulation and enables easy tracking and verification through digital records.
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
Enables accurate and affordable moisture content measurement, facilitates data sharing among stakeholders, and enhances market connectivity and traceability, empowering smallholder farmers to access higher-value markets and secure loans.
Implementation Method 1
A cost-effective grain moisture measurement system using capacitive sensing technology
Implementation Method 2
At least one moisture sensor (170) positioned to detect the moisture content of grain disposed in each respective chamber (130, 135)
Data Source
AI summary
An assembly (decoupled grain sampler and moisture content reader) for measuring grain moisture and sharing the grain moisture information with a database, other framers, and merchants, including a grain receiving chamber, at least one plate capacitor operationally connected to the grain receiving chamber, a capacitance to digital converter (or similar device) operationally connected to the at least one plate capacitor, a microprocessor operationally connected to the oscillator, a user interface operationally connected to the microprocessor, a smartphone app in operational communication with the microprocessor, and a transceiver operationally connected to the microprocessor and the smartphone app.