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Low power consumption digital vortex street flower

A vortex flowmeter, digital technology, applied in the direction of volume/mass flow generated by mechanical effect, dynamic effect by detecting fluid flow, etc., to achieve the effect of high integration, low voltage and low power consumption

Inactive Publication Date: 2009-01-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current processing method lacks the characteristics of the signal and the needs of signal processing to establish a signal model and determine the simulation program.

Method used

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  • Low power consumption digital vortex street flower
  • Low power consumption digital vortex street flower
  • Low power consumption digital vortex street flower

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawings 3 to 8 and through embodiments.

[0026] Firstly, the present invention adopts the standard table method to carry out real-flow calibration of water flow on the water flow experimental device (as shown in FIG. 3 ). The flow experiment is carried out on a device with a caliber of 25mm, and the standard meters are turbine flowmeters with a caliber of 10mm and 15mm. Flow meter A is the vortex street designed by the present invention, and flow meter B is a traditional analog meter for comparison. Experimental data show that the present invention can effectively resist interference so as to expand the lower limit of the measuring range, so that the measuring range ratio of the vortex flowmeter is significantly expanded. Taking a 25mm caliber vortex flowmeter as an example, the vortex range of the signal processed by the traditional analog method is generally 1.1m 3 / h~11m 3 / h (...

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Abstract

The flowmeter is composed of vortex street type sensing head, charge amplifier, differential amplifier, filter of resisting mixing and piling, embedded type micro control unit (MCU), and digital signal processor (DIP). MCU and DSP constitute dual kernel CPU. With A / D conversion being carried out in MCU, signal though interface is transferred to DSP. Processed data through HPI interface are transferred back to MCU, which completes functions of displaying, controlling, storing and remote transferring. The flowmeter is capable of picking up information under strong noise background without need of changing circuits depended on calibers, gases and liquids. Specification of the flowmeter is as following: velocity of flow 0.18m / s- 6.22m / s, range ratio 1:35, Reynolds number 4.90-10 to the power 2.

Description

technical field [0001] The invention belongs to the technical field of instruments and meters, and in particular relates to embedded systems and digital signal processing technologies. technical background [0002] Vortex flowmeters generally use pressure sensitive elements to convert the lateral alternating lift on the vortex generator of the vortex flowmeter into electrical signals, extract the vortex frequency from the electrical signal, and then obtain the vortex frequency according to the relationship between the vortex frequency and fluid flow Measured traffic. Although the vortex flowmeter has various advantages, some practical problems in practical applications affect the application and promotion of this kind of flowmeter. The problems mainly include: (1) The lower limit range of the vortex flowmeter is much higher than the theoretically possible minimum; (2) The vibration resistance of the flowmeter is poor, and the power of valves, pumps, compressors, etc. Vario...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/32
Inventor 张涛孙宏军段瑞峰
Owner TIANJIN UNIV
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