Ultrasonic flowmeter
CN114585884BActive Publication Date: 2026-07-07PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
- Filing Date
- 2020-11-10
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
Existing ultrasonic flow meters increase in size when measuring large flow rates, making them difficult to assemble into gas meter boxes, and their measurement accuracy is not high.
Method used
The flow path is divided into a main flow path and a secondary flow path. The main flow path has a rectangular cross-section, while the secondary flow path has a rectangular cross-section of the same width but a lower height. The ultrasonic signal is transmitted in the main flow path, and the flow calculation unit calculates the flow rate based on the transmission time.
Benefits of technology
It achieves a compact design and high-precision flow measurement, meeting the needs of large flow measurement.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN114585884B_ABST
Abstract
An ultrasonic flowmeter (1) includes a fluid flow path (2) through which a fluid to be measured flows, and a pair of ultrasonic transducers (6, 7) capable of transmitting and receiving ultrasonic signals. In addition, a flow rate calculation unit (21) measures a flow rate or a flow volume of the fluid to be measured based on a transmission time of an ultrasonic signal transmitted from one of the pair of ultrasonic transducers (6, 7) to the other of the pair of ultrasonic transducers (6, 7) in the fluid to be measured. Furthermore, the fluid flow path (2) includes a main flow path composed of a plurality of divided flow paths obtained by dividing a flow path of a rectangular cross section at the same width, and a sub flow path composed of an additional flow path having the same width as the divided flow path and a lower height than the divided flow path. Furthermore, the flow rate calculation unit (21) calculates a flow volume of the fluid to be measured flowing in the fluid flow path based on the flow rate or the flow volume of the fluid to be measured obtained based on the transmission time.
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