Ultrasonic Gas Meter Shielding Structure for Signal Interference Isolation
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Solution Overview
Problem
Ultrasonic gas meters are susceptible to interference from medium- and low-frequency signals, affecting measurement accuracy and proper operation.
Innovation Solution
An anti-interference structure comprising an upper housing, lower housing, gas flow channel, control box, shielding layer, signal sensor, and bidirectional threaded rod with sealing elements, which isolates gas flow and detects external signals to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no anti-interference structure is provided, then the device complexity is low, but the measurement precision deteriorates due to medium- and low-frequency signal interference
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the external environment and the ultrasonic wave transmission path. This shielding layer acts as a mediator that selectively blocks medium- and low-frequency interfering signals while allowing the ultrasonic measurement signals to pass through, thereby improving measurement precision without significantly complicating the overall device structure
Solution Approach 2:
The interfering medium- and low-frequency signals are extracted and isolated from the main ultrasonic measurement path by introducing a dedicated shielding structure. This separates the harmful interference from the useful measurement signals, allowing the measurement system to maintain high precision while the shielding component adds minimal complexity to the overall device
2Measurement precision
If a shielding layer is added to block external signals, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
Instead of providing comprehensive shielding throughout the entire device, the shielding layer is applied locally only at critical areas where external signals would most strongly interfere with ultrasonic wave transmission. This localized approach maintains measurement precision while minimizing the addition of device complexity
Solution Approach 2:
The shielding layer is implemented as a thin film or shell structure that provides effective signal blocking without adding significant bulk or complexity to the device. This thin-film approach achieves the required measurement precision while keeping the device structure relatively simple and maintaining ease of manufacture
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
Effectively shields external signals, preventing measurement inaccuracies by isolating gas flow and notifying personnel for inspection, while ensuring accurate measurement.
Implementation Method 1
one side of an interior of the control box is movably provided with a bidirectional threaded rod, and the other side of the interior of the control box is fixedly provided with a sliding rod; two sides of an outer surface of the bidirectional threaded rod are respectively movably connected to two sealing elements
Implementation Method 2
a side of an outer surface of the gas flow channel is fixedly provided with a shielding layer
Implementation Method 3
a side of an interior of the gas flow channel is fixedly provided with a signal sensor
Implementation Method 4
a side of an outer surface of the control box is fixedly provided with a motor; and an output end of the motor is fixedly connected to the bidirectional threaded rod
Data Source
AI summary
An anti-interference structure for an ultrasonic gas meter includes an upper housing and a lower housing. A gas flow channel is fixedly provided in the upper housing. A side of the gas flow channel is fixedly provided with a control box. According to the anti-interference structure for the ultrasonic gas meter, in practical work, gas can enter the gas flow channel, and a signal sensor inside the gas flow channel can detect external signals. When a signal is detected, a motor is started to drive a bidirectional threaded rod to rotate. Thus, two sealing elements are driven to move in opposite directions so as to isolate the flowing gas and prevent it from continuing to flow. Then, the signal sensor sends a signal to notify personnel of inspection. A shielding layer can effectively isolate the external signal, thereby preventing the measurement accuracy from being affected by the external signal.