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Small flow ultrasonic flow system and measuring method

A measurement method, ultrasonic technology, applied in the direction of measuring flow/mass flow, liquid/fluid solid measurement, measuring devices, etc., can solve the problems of time difference and change of conduction value, measurement error, etc., and achieve small fluctuation, small pressure loss, Product quality is stable and reliable

Inactive Publication Date: 2015-10-07
CHENGDU NANFANG ELECTRONICS METER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a small flow ultrasonic flow system and measurement method, which aims to solve the problem of measurement error due to various factors that lead to time differences and changes in the actual measurement process of the flow sensor.

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  • Small flow ultrasonic flow system and measuring method
  • Small flow ultrasonic flow system and measuring method

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Such as Figure 1 to Figure 4 As shown; the small flow ultrasonic flow system includes: MCU module 1, LCD module 2, memory 3, upper computer communication module 4, GP2 module 5, analog switch 6, DC blocker, frequency selector 7, amplifier 8, comparator 9 , ultrasonic transducer 10;

[0024] The MCU module 1 is used to control each module, receive the data of each module and perform calculation processing; the LCD module 2 is connected with the MCU module 1, and ...

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Abstract

The invention discloses a small flow ultrasonic flow system and a measuring method and belongs to the field of flow detecting and calculating. An MCU module is used for controlling all modules, receiving data of all the modules and carrying out operation. The LCD module is connected with the MCU module and used for displaying data produced by the MCU module. A memorizer is connected with the MCU module and used for conducting bi-directional communication with the MCU module and saving the produced data. The upper computer communication module is connected with the MCU module and used for carrying out bi-directional data exchanging with the MCU module. The GP2 module is connected with the MCU module and used for sending measuring data to the MCU module and receiving an instruction from the MCU module. A time-difference method ultrasonic flowmeter and a compensating measure are adopted, and the effect of the temperature on the sound speed and the water density and the nonlinear errors are eliminated. An arc-shaped sound wedge structure and a manufacturing technology are adopted, and the sound wedge performance is stabilized and is not affected by the temperature or vibration.

Description

technical field [0001] The invention belongs to the field of flow detection and calculation, and in particular relates to a small-flow ultrasonic flow system and a measurement method. Background technique [0002] Ultrasonic flow detection can be divided into different types of flow measurement methods such as propagation time method, Doppler effect method, correlation method, beam shift method and noise method. Among ultrasonic flow measurement methods, time difference method and Doppler method are the most widely used methods. extensive. The Doppler method uses the principle of acoustic Doppler to determine the flow rate of the fluid by measuring the ultrasonic Doppler frequency shift of the scattering body in the inhomogeneous fluid. Suspended particles or air bubbles, so there are certain limitations in application. In the actual measurement process of the flow sensor, due to various factors, the time difference and change of the value will lead to the measurement erro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66
Inventor 李俊国秦东兴
Owner CHENGDU NANFANG ELECTRONICS METER CO LTD
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