Differential flowmeter

A flowmeter and differential pressure technology, which is applied in the fields of differential pressure flowmeter, flow measurement, and detection, can solve problems such as difficulty in guaranteeing linearity, interference, and complex structure, and achieve the effects of self-compensation for external influences, high precision, and simple structure

Inactive Publication Date: 2014-04-16
SHANDONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These sensors are all designed through different mechanical structures, so that the change of flow velocity and the deformation and force acting on the structure maintain a certain mathematical relationship, and the FBG sensor pasted on the structure senses the deformation and force, thereby indirect measurement However, due to their structural design, it is difficult to guarantee the linearity between the flow measurement and the force of the structure, and it is seriously affected by temperature and external interference. Even if you want to eliminate the influence of temperature, you need an additional reference temperature sensor; although some structures The linear relationship is guaranteed and the accuracy is improved, but the structure is relatively complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Differential flowmeter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Such as figure 1 As shown, a differential pressure flowmeter includes a fixed rod 4 that passes through the diameter of the liquid flow tube 1 and is fixed to the tube. There are two opposite identical umbrella-shaped structures, the two umbrella-shaped structures are made up of cones 2 and supporting cylinders 3, and their structural dimensions are the same, and the two supporting cylinders 3 are provided with Fiber Bragg grating 5 with the same parameters, two fiber Bragg gratings 5 ​​with the same parameters, are processed by ultraviolet engraving on one optical fiber with a certain distance in space. After the optical fiber leads out of the liquid flow tube 1, it is connected to the strength demodulator (light source, optocoupler, photoelectric conversion circuit), and then connected to the data processing device.

[0015] The fixed rod 4 i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a differential flowmeter, which comprises a fixing rod. The fixing rod penetrates through a liquid flow tube along the diameter thereof and is fixed in the liquid flow tube, two opposite identical umbrella-shaped structures are arranged on the fixing rod in the liquid flow tube along the axial center direction of the liquid flow tube, each umbrella-shaped structure consists of a cone and a supporting cylinder, both the two supporting cylinders are provided with fiber bragg gratings with the same parameters, the same optical fiber is photoetched and processed by the aid of ultraviolet rays at intervals to form the two fiber bragg gratings, and the optical fiber is connected with an intensity demodulating device after leading out of the liquid flow tube, and then is connected with a data processing device. The differential flowmeter is simple in structure, and by the aid of stress difference of the two FBG (fiber bragg gratings) with the same structures on the optical fiber, self compensation of temperature and external influences is realized.

Description

technical field [0001] The invention relates to a differential pressure flowmeter. It belongs to flow measurement and detection technology. Background technique [0002] In the automation of industrial production process, flow is one of the parameters that need to be frequently measured and controlled. The earliest and most widely used flow sensor is the mechanical rotor type. Its technology is relatively mature, but due to the limitation of mechanical structure, the measurement error is large . The subsequently developed electromagnetic flowmeters, ultrasonic flowmeters and acoustic Doppler flowmeters all have high measurement accuracy and are easy to use, but are susceptible to electromagnetic interference and have high cost of use. Optical fiber flowmeter has the advantages of anti-electromagnetic interference, small size and light weight, etc., but the optical fiber flowmeter is designed by utilizing the modulation of flow rate on the intensity and phase of the optical...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/36
Inventor 蒋奇杨猛高芳芳吕丹丹张冉吴震
Owner SHANDONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap