Detachable Liquid Sensor Unit With Shielded Analog Signal Connection
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Solution Overview
Problem
Existing liquid analysis devices require the replacement of both the sensor portion and the conversion portion when the sensor portion deteriorates, leading to increased running costs and potential interference from electromagnetic noise.
Innovation Solution
The liquid analysis device allows the sensor portion and conversion portion to be detachably connected, with a metal shield at the connection point to reduce electromagnetic noise, enabling the replacement of only the sensor portion and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sensor portion and conversion portion are integrated in a single container, then the device structure is simple, but the running cost increases because the conversion portion must be replaced along with the sensor portion
Solution Approach 1:
The device is divided into two separable parts: the sensor portion (with connection plug) and the conversion portion (with connection terminal). This segmentation allows the sensor portion to be replaced independently without replacing the conversion portion, reducing running costs while maintaining structural simplicity through the modular design
2Loss of substance
If the sensor portion and conversion portion are detachably connected, then the running cost decreases, but electromagnetic noise is applied to the analog signal from the connection portion
Solution Approach 1:
A metal shield is introduced as an intermediary component at the connection portion between the connection plug and wire. This metal shield acts as a barrier that blocks electromagnetic noise from interfering with the analog signal, allowing detachable connection while maintaining signal quality
3Measurement precision
If a metal shield is provided at the connection portion, then measurement accuracy is improved by reducing electromagnetic noise, but the device complexity increases
Solution Approach 1:
The metal shield is applied locally only at the connection portion where electromagnetic noise interference occurs, rather than throughout the entire device. This localized approach improves measurement accuracy while minimizing the increase in overall device complexity
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
This configuration reduces the running cost of the liquid analysis device by allowing only the sensor portion to be replaced, while also enhancing measurement accuracy by minimizing electromagnetic noise interference.
Implementation Method 1
a metal shield is provided at a connection portion between the connection plug and a wire of the sensor portion
Data Source
AI summary
The present invention reduces a running cost in a liquid analysis device and reduces electromagnetic noise superimposed on an analog signal. The present invention includes a sensor portion configured to contact a liquid and output an analog signal corresponding to a predetermined measurement target item, a conversion portion configured to convert the analog signal obtained by the sensor portion into a digital signal, and a device body to which the conversion portion is connected by a wire or wirelessly, the device body being configured to acquire the digital signal from the conversion portion. The sensor portion and the conversion portion are attachable to and detachable from each other, the sensor portion includes a connection plug that electrically connects to the conversion portion, and a metal shield is provided at a connection portion between the connection plug and a wire of the sensor portion.