Calibration method of pump station information intelligent monitoring terminal based on multi-parameter detection

Abstract

The invention discloses a calibration method of a pump station information intelligent monitoring terminal based on multi-parameter detection. The method comprises the following steps that pump station unit status is detected to determine that a pump station unit is in a stopped state; the pump station information intelligent monitoring terminal is started and initialization is completed; information configuration is conducted; zero-crossing detection is conducted; the pump station unit is electrified, after it is determined that the pump station unit is in a full load state, power, water extraction water level difference and flow detection data of multiple detection poinTS are acquired by the pump station information intelligent monitoring terminal at time intervals, a rated flow parameter calibration algorithm is operated, and calibration parameters are extracted; power of the pump station unit is shut down, the pump station unit is in the stopped state, and zero-drift detection is conducted; storage, uploading and integrity check are conducted on the configuration information and the determined calibration parameters. According to the method, comprehensive and effective real-time dynamic monitoring is achieved, reasonable calibration parameters are extracted, accuracy of the measuring process can be ensured, the calculation is high-efficient, the accuracy is reliable, and monitoring of pump station information is helped to be more accurate.

Description

technical field [0001] The invention relates to a calibration method, in particular to a calibration method for an intelligent monitoring terminal of pumping station information based on multi-parameter detection, and belongs to the technical field of data collection and monitoring. Background technique [0002] As an important part of water conservancy projects, pumping stations play an important role in people's daily production and life, undertaking important tasks such as water diversion, water supply, irrigation, flood control, etc. In areas where large-scale pumping stations are relatively concentrated in my country, an engineering system of water transfer, water supply, irrigation, and drainage has been initially formed, with large-scale pumping stations as the mainstay and small-scale pumping stations as the supplement. Most regions are still in the initial stage of transformation from traditional manual methods to automated methods. [0003] With the rapid developm...

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Problems solved by technology

[0005] The traditional method of flow meter flow measurement: the partial flow rate is obtained by multiplying the partial average flow velocity perpendicular to the water-passing section of several partial areas by the partial water-passing area, and then calculates its algebra and obtains the cross-sectional flow rate, and the flow measurement accuracy is not high.

[0006] Ultrasonic flowmeter flow measurement method: has high requirements for the measured fluid, can only be used for clean liquid and gas flow, has low precision, poor stability, and is easily affected by pipelines, which have a great impact on the accuracy of flowmeters , when the actual homogeneous fluid is required for external calibration of the instrument, the application occasions are limited, and the traditional flow measurement method is used for comparative measurement and calibration, and the measurement accuracy is not high

[0007] Electromagnetic flowmeter flow measurement method: high environmental requirements, pipeline corrosion and attachments will have a great impact on the flow measurement accuracy of the instrument. In the actual rate timing, the local position flow velocity is used instead of the cross-sectional average flow velocity, and the measurement accuracy is not high.

[0008] Orifice plate flowmeter flow measurement method: when performing coefficient rate timing, there are many and intricate influencing factors, and the accuracy is difficult to improve. The flow coefficient is related to the Reynolds number, and the measurement range is narrow; when the orifice plate is worn, the calibration coefficient will be invalid. Difficult to guarantee

[0009] Turbine flowmeter flow measurement method: the average flow velocity of the fluid is sensed by the multi-blade rotor, and the flow or total amount is derived, but the calibration characteristics cannot be maintained for a long time. When recalibrating, the sensor needs to be replaced, and the calibration parameters cannot be simply modified. achieve recalibration

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