Inductive Water Meter Signal Detection
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Solution Overview
Problem
Existing impeller water meters face challenges in accurately detecting rotary signals due to sensitive measurement devices being affected by fluctuations and requiring precise component positioning, leading to erroneous measurements.
Innovation Solution
The design incorporates a metallic, ring-shaped signal transmitter arranged at an angle to interact with inductive pickups at different distances, allowing for reliable detection of rotary signals with improved measurement accuracy and reduced errors from imprecise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between the coil and the copper plate is reduced to improve measurement sensitivity, then the measurement precision is improved, but the device becomes more sensitive to positioning errors and fluctuations
Solution Approach 1:
The patent transitions from a single-coil design to a differential pair of coils arranged symmetrically. This spatial configuration in another dimension enables the system to achieve both close proximity to the copper plate for sensitivity and symmetry for error compensation, resolving the contradiction between measurement precision and reliability.
Solution Approach 2:
The patent employs symmetric arrangement of coil pairs rather than asymmetric positioning. This symmetry ensures that both coils are equidistant from the copper plate, making the measurement immune to small positioning variations and fluctuations, thus improving reliability while maintaining precision through the differential configuration.
2Measurement precision
If expensive materials with strong magnetic fields are used to improve signal strength, then the measurement precision is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple inexpensive iron powder coils into a differential pair configuration. By merging the output signals from two coils in a differential arrangement, the system achieves signal strength and noise rejection comparable to expensive materials, while maintaining low manufacturing cost through the use of inexpensive components.
Solution Approach 2:
The patent changes the configuration parameter from single-coil to differential pair, and optimizes the winding parameters (number of turns, wire diameter, winding density) of the iron powder coils. These parameter changes enable inexpensive coils to generate sufficient magnetic field strength for precise measurement without requiring expensive materials.
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 enhances the reliability and accuracy of rotary signal detection, enabling more precise measurement of impeller rotation and direction, while compensating for installation inaccuracies and fluctuations, using inexpensive iron powder coils with reduced field strength.
Implementation Method 1
a measuring body, for example an impeller of an impeller shaft, which can be set in rotary motion by a liquid flowing through the measuring chamber and the rotary movement of the measuring body, which is designed as an impeller, can be detected and evaluated by downstream evaluation electronics by means of inductive scanning of a signal generated during the rotation of the impeller
Implementation Method 2
a variable generate a magnetic field, and measured values, i.e. the number of revolutions of the impeller, are recorded and evaluated for downstream evaluation electronics
Data Source
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AI summary
The invention relates to a vane water meter comprising a measuring device for detecting rotation signals with a measuring insert lying in the measuring chamber (1) of the device, wherein a vane (40) is rotatably held by a vane shaft (30) in the measuring chamber. The measuring device comprises a rotating signal transmitter (20) lying in the measuring chamber (1), said transmitter interacting with the vane (40) and rotating over at least one inductive sensor (10) during a rotation of the vane (40). The rotating signal transmitter (20) is a metal component (20) which forms a closed conductor loop and which is designed as a closed ring, said component being at a different distance from the at least one inductive sensor (10) during the rotation of the vane (40).