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Control method and device for metering screw, controller and metering screw

A technology of measuring screw and control method, which is applied to controllers with specific characteristics, measuring devices, electric controllers, etc., can solve problems such as fluctuations in measurement drop, inability to achieve stable measurement accuracy, and inability to dynamically track changes in measurement drop. Achieve measurement accuracy assurance, avoid economic loss, and solve the effect of measurement error

Pending Publication Date: 2022-04-29
中联重科新材料科技有限公司
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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a control method and device, a controller, and a metering screw for a metering screw, so as to solve the problem that the accurate metering of the current metering screw is based on a fixed low-speed frequency, and cannot dynamically track the change of the metering head, so that the metering head fluctuates. As well as the aforementioned technical problems of the spiral metering open-loop control, the metering accuracy cannot achieve a stable effect

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  • Control method and device for metering screw, controller and metering screw
  • Control method and device for metering screw, controller and metering screw
  • Control method and device for metering screw, controller and metering screw

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Embodiment Construction

[0022] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the implementation of the present application, the directional indications are only used to explain the position in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second" and so on are only for descriptive p...

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Abstract

The embodiment of the invention provides a control method and device for a metering screw, a controller and the metering screw. The control method for the metering screw comprises the steps that a precise weighing flow setting value, a precise weighing flow recording value, a metering error recording value and a precise weighing flow setting interval for precise weighing flow self-setting of the metering screw are initialized; according to the fine weighing flow setting value, the fine weighing flow recording value, the metering error recording value and the fine weighing flow setting interval, fine weighing flow self-setting is carried out on the metering screw, so that a target setting value of the fine weighing flow of the metering screw is obtained; and performing flow closed-loop control on the metering screw according to the target setting value. According to the embodiment of the invention, the optimal precise weighing flow setting value can be automatically matched, the metering precision is improved, the frequency of the metering screw is adjusted in real time, the flow is kept stable, metering errors caused by fall fluctuation are solved, the production quality of products is ensured, and economic losses caused by metering reasons are avoided.

Description

technical field [0001] The invention relates to the technical field of metering control, in particular to a control method and device for a metering screw, a controller and a metering screw. Background technique [0002] At present, the measurement of screw machines generally adopts frequency conversion control based on weight control algorithm. When the weighing feedback value reaches the accurate measurement range, the measurement control is performed by switching the low-speed frequency of the measurement screw. The frequency is fixed, open-loop control, and the flow drop is unstable, which is easy to cause drop fluctuations. , resulting in measurement errors. When the measurement starts, the measurement screw runs at high-speed frequency. When the feedback value of the load cell reaches the accurate measurement range, the measurement screw switches to low-speed frequency operation. The frequency of the measurement screw decreases, the flow rate decreases, and the measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G11/00G05B11/42G01G11/06
CPCG01G11/003G05B11/42G01G11/06
Inventor 刘凯王子吉力黄俊豪程猛
Owner 中联重科新材料科技有限公司
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