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Rotation speed signal filtering time delay and network transmission time delay compensation method of motor of metering pump

A technology of motor speed and network transmission, which is applied in the direction of instruments, adaptive control, control/regulation systems, etc., can solve problems affecting fluid control performance, and achieve the effect of improving detection accuracy

Active Publication Date: 2018-09-18
ZHEJIANG UNIV OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

For these two parts of the time delay, if no effective compensation method is adopted, the control performance of the fluid will be affected

Method used

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  • Rotation speed signal filtering time delay and network transmission time delay compensation method of motor of metering pump
  • Rotation speed signal filtering time delay and network transmission time delay compensation method of motor of metering pump
  • Rotation speed signal filtering time delay and network transmission time delay compensation method of motor of metering pump

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing.

[0017] Assuming that the transmission ratio of the motor worm gear reducer is r, the volume change of the metering pump diaphragm in a reciprocating stroke is ΔV (liter), and the motor speed is n (rev / min), then under steady-state conditions, it can be calculated according to The following formula calculates the steady-state volume flow

[0018]

[0019] make but

[0020] Q=60ΔV r n(liter / hour) (2)

[0021] The drive motor of the reciprocating industrial metering pump is subjected to nonlinear loads, so there are large speed fluctuations. According to formula (2), large fluctuations in speed n will cause large fluctuations in flow Q. For this reason, V / with voltage compensation can be used The F control algorithm suppresses large speed fluctuations, but small speed fluctuations will also affect the detection accuracy of flow. In order to further improve the accura...

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Abstract

The invention discloses a rotation speed signal filtering time delay and network transmission time delay compensation method of a motor of a metering pump. Industrial metering pumps are widely appliedin the field of process industries. Self-adaptive filtering is performed on slight fluctuation of rotation speed of the driving motor of an industrial metering pump, so flow detection precision can be improved. By implementing networked remote optimized adjustment on flows, control procession and control performance can be improved. Rotation speed filtering and network transmission will generatetime delays, which will cause decreasing of control performance. According to the invention, the rotation speed filtering time delay and the network transmission time delay are simultaneously considered; and by use of the characteristic that control information of multiple moments can be solved through online optimization at a time of model prediction control, time delay compensation is performed,so control performance is ensured.

Description

technical field [0001] The invention relates to the field of fluid dosing and control of industrial metering pumps, in particular to the compensation technology for signal processing time delay and network transmission time delay of networked high-performance fluid control. Background technique [0002] The output value of my country's process industry accounts for more than 60% of the total industrial output value, and the addition of liquid medium is the process of adding various chemical agents in a continuous or intermittent manner in a continuous or intermittent manner to ensure product quality. Key production process links. The liquid medium dosing device takes the industrial metering pump as the core, and is widely used in process industries such as petroleum, chemical industry, water treatment, thermal power generation, pharmaceuticals, food, and papermaking. [0003] The existing metering pump roughly adjusts the flow rate offline through the handwheel, which cannot...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 余世明何德峰仇翔吴根忠宋秀兰俞立
Owner ZHEJIANG UNIV OF TECH