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Super-wide range vortex street signal measurement method

A technology of signal measurement and wide range, applied in measuring devices, measuring flow/mass flow, liquid/fluid solid measurement, etc., to achieve the requirements of reducing power supply noise, simplifying power supply circuits, and speeding up production

Inactive Publication Date: 2016-09-21
TIANJIN XUNER ELECTRONICS INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some products can only achieve the range of 8:1

Method used

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  • Super-wide range vortex street signal measurement method
  • Super-wide range vortex street signal measurement method

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Embodiment Construction

[0032] A specific embodiment of the invention will be described below in conjunction with the accompanying drawings.

[0033] The ultra-wide range vortex signal measurement method provided by the present invention includes the following steps, the specific flow chart is as follows figure 2 Shown:

[0034] Step a. Catch the interrupt service

[0035] 1) Input the permission capture interrupt service in the single-chip microcomputer, and each time a capture interrupt is performed, the frequency counter is incremented by 1;

[0036] 2) Then exit the capture interrupt and enter the 1 second service function step;

[0037] Step b. 1 second service function, that is, automatically execute the function every 1 second.

[0038] 1) Calculate the frequency value of the frequency counter in the capture interrupt service, and adjust the sampling frequency according to this value to ensure the correctness of the sampling frequency;

[0039] 2) Determine whether the number of AD sample...

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Abstract

The invention belongs to the technical field of flow measurement, and particularly relates to a super-wide range vortex street signal measurement method. The super-wide range vortex street signal measurement method includes the steps: a, interrupt capturing service; b, 1 second service function, i.e., automatically executing the function every two seconds; and c, interrupt sampling service. The beneficial effects of the method are that the range of a flow meter can be greatly expanded, in particular to the lower limit of measurement, manual debugging can be avoided, the production cost is reduced, and the production speed is accelerated.

Description

technical field [0001] The invention belongs to the technical field of flow measurement, in particular to an ultra-wide range vortex signal measurement method. Background technique [0002] The vortex flowmeter uses the principle of the Kalman vortex street in fluid mechanics, and according to the characteristic that the frequency of the sensor output signal is proportional to the flow velocity within a certain range of flow velocity, the frequency of the sensor output signal is used to measure the fluid flow velocity. In theory, the direct correspondence between the signal frequency and the flow velocity has a range of 100:1, but at the same time, the frequency amplitude of the output signal of the general stress sensor is proportional to the square of the signal frequency value, that is, when the flow velocity is slightly higher, the sensor The pulsation amplitude of the output signal is relatively large, and the corresponding frequency measurement is relatively easy, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/32
CPCG01F1/325
Inventor 李红锁蒲诚孙靖杜亮
Owner TIANJIN XUNER ELECTRONICS INFORMATION TECH CO LTD
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