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Dry calibrating method and apparatus of portable electromagnetic flowmeter

A technology of electromagnetic flowmeter and calibration method, which is applied in the direction of measuring device, testing/calibrating device, liquid/fluid solid measurement, etc. It can solve the problems of inconvenient transportation, complicated point-by-point scanning process, and low device calibration efficiency, and achieve calibration efficiency Improved effect

Inactive Publication Date: 2010-03-24
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But no matter what kind of existing device, the way of point-by-point scanning means a complicated point-by-point scanning process and a heavy driving mechanism, the calibration efficiency of the device is low and the handling is extremely inconvenient

Method used

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  • Dry calibrating method and apparatus of portable electromagnetic flowmeter
  • Dry calibrating method and apparatus of portable electromagnetic flowmeter
  • Dry calibrating method and apparatus of portable electromagnetic flowmeter

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Embodiment Construction

[0019] Such as figure 1 As shown, the Hall sensor array 2 used to measure the magnetic flux density is fixed on the insulating plastic paper 1, and the signal output terminal of each Hall sensor in the array is connected to the cable connector 4 through the sensor signal cable 3, so that Constitute one of key components of the present invention to measure paper 6. When in use, the measuring paper 6 is curled and pasted on the inner wall of the electromagnetic flowmeter pipe section 5 to obtain information on the normal magnetic flux density distribution on the wall. In order to ensure the measurement accuracy during use, the Hall sensor array 2 on the measuring paper 6 should be as dense as possible, the diameter of a single Hall sensor is about 1mm, and the distance between the centers of the sensors is about 2mm. Correspondingly, the sensor signal cable 3 should also be very tight. Therefore, it is necessary to use a special IC process to complete the production of the abo...

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Abstract

The invention provides a dry calibration method and the device for the portable electromagnetic flow meter. The device comprises a measuring paper which is arranged with hall sensor array, a measuringcontrol module and a portable computer. The measuring paper is pasted to the inner wall of the electromagnetic flow meter pipe. The computer controls the measuring paper through the measuring controlmodule to obtain the normal flux density distribution information of the pipe inner wall, and furthermore, combining with the geometries of the electrode and the pipe and the flow rate distribution information, and by using the computer program compiled based on dry calibration methematical model, the once sensor conversion coefficient can be calculated, and so the once sensor dry calibration ofthe electromagnetic flow meter can be realized. The size of the measuring paper can be adjusted by cutting or assembling, which leads that the device can be applied in the electromagnetic flow meter with different size. The device removes the complicate point-by-point scanning process and the bulky driving mechanism in the prior point-by-point typed dry calibration device, which makes the calibration rate improve greatly. The device is quite light and convenient, and is a portable dry calibration device for the electromagnetic flow meter.

Description

technical field [0001] The invention relates to a calibration method and device applied to an electromagnetic flowmeter, in particular to a dry calibration method and a device for a portable electromagnetic flowmeter. Background technique [0002] At present, the calibration devices of electromagnetic flowmeters are divided into real flow calibration devices and dry calibration devices. The real-flow calibration device is composed of a high-power pump station, pipelines and large liquid storage tanks, etc., and the actual flow of liquid flows through the electromagnetic flowmeter to achieve calibration. Although the principle is simple, the real-flow calibration device, especially the real-flow calibration device for large-diameter electromagnetic flowmeters, is extremely bulky and expensive, and the calibration cost is also very high. The electromagnetic flowmeter dry calibration device measures the relevant physical quantities and calculates the primary sensor conversion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00
CPCG01R33/0094
Inventor 付新胡亮阮晓东叶朋
Owner ZHEJIANG UNIV
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