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Filling control method, device and system

A control method and filling system technology, applied in the field of measurement and control, can solve the problems such as the decline of filling accuracy and the error of the measurement value of the weighing element, and achieve the effect of improving stability and processing accuracy.

Active Publication Date: 2020-01-03
GUANGZHOU TECH LONG PACKAGING MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the filling system is disturbed by the outside world, there will be errors in the measured value of the weighing element, resulting in a decrease in filling accuracy.

Method used

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  • Filling control method, device and system
  • Filling control method, device and system
  • Filling control method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] figure 1 It is the flow chart of the filling control method in embodiment one, with reference to figure 1 , the control method includes the steps of:

[0022] S101. Receive a weighing signal from a weighing sensor, and perform a primary filter on the weighing signal to generate a first weighing signal sequence.

[0023] In this step, a primary filter is performed on each sampled weighing signal, and the weighing signal is formed into a weighing signal sequence in chronological order, for example, six weighing signals are sequentially selected to form a weighing signal sequence, and when a new When weighing the signal, the weighing signal is added to the weighing signal sequence, and the weighing signal at the earliest moment in the weighing signal sequence is removed from the sequence to ensure that the length of the sequence remains unchanged.

[0024] Optionally, the first-level filtering in this step includes median filtering, limiting filtering, and Kalman filteri...

Embodiment 2

[0054] figure 2 It is the structural diagram of the filling control device in the second embodiment, refer to figure 2 , the filling control device 100 includes:

[0055] The filter module 1 is configured to receive the weighing signal from the load cell, and perform a primary filter on the weighing signal to generate a first weighing signal sequence. Vibration suppression is performed on the first weighing signal sequence to generate a second weighing signal. Using the second weighing signal to generate a second weighing signal sequence, performing secondary filtering on the second weighing signal sequence to generate a third weighing signal.

[0056] Optionally, the filtering module 1 performing a primary filter on the weighing signal to generate the first weighing signal sequence includes: performing limiting filtering on the sampling sequence of the weighing signal within a unit period to generate the first weighing signal sequence.

[0057] Performing vibration suppr...

Embodiment 3

[0074] image 3 It is a schematic structural diagram of the filling control system in embodiment three, referring to image 3 , this embodiment proposes a filling control system, including the filling control device 100 described in any of the above embodiments, and also includes a filling system 200 and a load cell 300, the filling control device 100, the filling system 200 and the weighing The sensor 300 constitutes a closed-loop control system. Wherein, the filling system 200 is used for generating an initial filling signal and a corrected filling signal. The weighing sensor 300 is used to detect the total weight of the filling container 400 and the current filling, and send a weighing signal to the filling control device 100 . The filling control device 100 sends the difference between the generated third weighing signal and the preset weight signal to the filling system 200, and the filling system 200 uses the difference to generate a filling signal for the next filling...

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Abstract

The invention provides a filling control method, device and system. The filling control method includes the steps that a weighing signal of a weighting sensor is received, first-stage filtering is carried out on the weighing signal to generate a first weighing signal sequence; vibration suppression is carried out on the first weighing signal sequence to generate a second weighing signal; the second weighing signal is adopted to generate a second weighing signal sequence, second- stage filtering is carried out on the second weighing signal sequence to generate a third weighing signal; and basedon the third weighing signal, a correction signal is generated, and the correction signal is used for correcting errors of a filling signal generated by a filling system. According to the filling control method, periodic or non-periodic interference signals from the filling system and the external environment are effectively eliminated through first-stage filtering, vibration suppression and second-stage filtering in sequence; and the stability of the filling system is improved through two times of filtering, and the processing accuracy of the weighing signal is improved.

Description

technical field [0001] Embodiments of the present invention relate to measurement and control technology, and in particular to a filling control method, device and system. Background technique [0002] Weighing and feeding system is an important part of the industrial measurement field, widely used in food, chemical and other industries. As a basic weighing feeding system, the rotary weighing filling machine has faster filling speed and higher filling efficiency, but the rotary weighing filling machine has inherent characteristics such as large vibration and large interference , so it requires high control precision. [0003] In the prior art, digital weighing elements are generally used. When the measured weight in the container reaches a preset value, the weighing element sends a control command to the PLC, and the PLC drives the solenoid valve to adjust the filling flow or stop the filling. Pack. However, when the filling system is disturbed by the outside world, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65B57/14B65B1/32B65B3/28B65B43/46
CPCB65B57/14B65B57/145B65B1/32B65B3/28B65B43/46
Inventor 林志军王宏翔宋俊杰
Owner GUANGZHOU TECH LONG PACKAGING MACHINERY CO LTD
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