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System for measuring fluid flow velocity

一种流体、速度的技术，应用在速度的系统领域，能够解决误差、确定标记物困难、无法精确测量流体速度等问题，达到速度范围增大、避免不利影响的效果

Active Publication Date: 2012-09-26
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, determining the point in time at which the marker actually crosses the marker-detecting sensor is relatively difficult, causing significant error
Therefore, the device disclosed in US-A2009 / 0173166 A1 cannot accurately measure the velocity of fluid flowing through the flow channel

Method used

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  • System for measuring fluid flow velocity
  • System for measuring fluid flow velocity
  • System for measuring fluid flow velocity

Examples

Experimental program
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Embodiment Construction

[0033] figure 1 A system 102 for measuring the velocity of a fluid 104 flowing through a flow channel 106 is schematically shown. The system 102 includes a heating element 108 for generating thermal markers in the fluid 104 . Here, predetermined time-varying levels of power are supplied to the heating element 108 during operating conditions by a power source known per se. The system 102 also includes a sensor device 110 for generating a measurement signal 112 indicative of the velocity of the fluid 104 flowing through the flow channel 106 .

[0034] In this embodiment, the sensor arrangement 110 is configured to measure a time series of a primary temperature 114 of the fluid 104 at a primary location, for example by installing a temperature sensor 116 at said primary location. In an embodiment of system 102 , heating element 108 and sensor device 110 are mounted in wall 118 of flow channel 106 . Preferably, there is little thermal resistance between the heating element 108 ...

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Abstract

The invention relates to a system (102) for measuring a velocity of a fluid (104) flowing through a flow channel (106). The system comprises a heating element (108) configured for generating a thermal marker in the fluid (104) in response to a predetermined time-varying level of power provided to the heating element (108). The system (102) furthermore comprises a sensor arrangement (110) for generating a measurement signal (112) indicative for the velocity of the fluid (104) flowing through the channel (106). Herein, the sensor arrangement (110) is configured for measuring a time series of the primary temperature (114) of the fluid (104) at a predetermined primary location. The primary location and the heating element (108) are situated on an axis having at least a component parallel to the longitudinal axis (119) of the flow channel (106).; The measurement signal (112) is based on the maximum value (120) of the time series of time series of the primary temperature (114) in response to the thermal marker.

Description

technical field [0001] The present invention relates to a system for measuring the velocity of a fluid flowing through a flow channel. Background technique [0002] US-A2009 / 0173166A1 discloses a device for measuring the flow rate of a fluid, which device comprises a flow channel and at least one mark depositor (mark depositor) for introducing at least one mark in the flow channel at an introduction position, thereby causing the fluid Variations of the mark especially the heat mark. The apparatus also includes a plurality of mark detection sensors configured to detect changes in the fluid caused by the introduction of the at least one mark, such as temperature sensors located upstream and downstream of the mark depositor. [0003] Thermal markers are generated in a substantially discrete manner with respect to time so as to be observable. However, thermal markers become less discrete over time due to thermal diffusion in the fluid and flow channels. In view of said therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/708G01F1/704G01F1/7084
CPCG01F1/7084G01F1/7044
Inventor J·R·哈尔曾
Owner KONINK PHILIPS ELECTRONICS NV