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Device and method for monitoring pultrusion process parameters of composite material in real time

A technology of pultrusion molding and process parameters, which is applied in the field of real-time monitoring devices for composite material pultrusion molding process parameters, can solve problems such as high cost, process parameters are susceptible to external interference, and cannot accurately reflect the solidification state of composite materials Small, easy to control and the effect of subsequent process optimization

Active Publication Date: 2021-12-28
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the pultrusion process, the molding and curing of composite materials occur in the molding die. The process parameters outside the molding die are susceptible to external interference and cannot accurately reflect the curing state of the composite material in the molding die.
At this stage, the only real-time monitoring method for process parameters in the molding mold is to embed a disposable optical fiber sensor, but the embedded optical fiber sensor will affect the quality of the finished composite material, and it is a disposable sensor. Higher cost in mass production

Method used

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  • Device and method for monitoring pultrusion process parameters of composite material in real time
  • Device and method for monitoring pultrusion process parameters of composite material in real time
  • Device and method for monitoring pultrusion process parameters of composite material in real time

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Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a device for real-time monitoring of composite material pultrusion process parameters;

[0037] Such as figure 1 As shown, a real-time monitoring device for composite material pultrusion process parameters, including:

[0038] The upper computer, the upper computer is connected with the temperature sensor, the friction sensor and the pressure sensor respectively; the upper computer is configured as:

[0039] Obtain the temperature data inside the mold through the temperature sensor installed on the mold;

[0040] Obtain the friction data inside the mold through the friction sensor installed on the mold;

[0041] Obtain the pressure data inside the mold through the pressure sensor set on the mold;

[0042] The host computer performs preprocessing on temperature data, friction data and pressure data, and performs curve representation and fault alarm on the three data.

[0043] Further, the temperature sensor includes: a thermal resistor, the f...

Embodiment approach

[0071] (1) Temperature detection

[0072] This embodiment adopts the resistance temperature measurement method, uses PT100 as the temperature sensitive element, converts the temperature information into the change of the resistance value, and then converts the resistance value into a voltage value through a precision conversion circuit, and finally realizes the temperature value through the analog-to-digital conversion. Digitizing. PT100 temperature sensor is a resistance temperature detector made of platinum (Pt), which belongs to positive resistivity. Its resistance value will change with the change of temperature, and there is a certain relationship between its output signal and temperature variable. The continuous function relationship, as long as the resistance value of PT100 is obtained, the current temperature value can be calculated.

[0073] A three-wire resistance-voltage conversion circuit is used, and the schematic diagram is attached Figure 5 Shown, where Rpt10...

Embodiment 2

[0090] This embodiment provides a method for real-time monitoring of composite material pultrusion process parameters;

[0091] A method for real-time monitoring of composite material pultrusion process parameters, comprising:

[0092] Set the temperature sensor inside the mold by drilling and installing to obtain the temperature data inside the mold;

[0093] Obtain the friction data inside the mold through the friction sensor installed on the mold;

[0094] Obtain the pressure data inside the mold through the pressure sensor set at the position of the mold fixing screw;

[0095] The host computer performs preprocessing on temperature data, friction data and pressure data, and performs curve representation and fault alarm on the three data.

[0096] Further, the temperature sensor installed inside the mold by means of punching holes to obtain temperature data inside the mold; specifically includes:

[0097] The resistance value of PT100 increases at a constant speed as the...

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Abstract

The invention discloses a device and method for monitoring pultrusion process parameters of a composite material in real time. An upper computer is connected with a temperature sensor, a friction force sensor and a pressure sensor; the upper computer is configured to obtain temperature data in a mold through the temperature sensor arranged on the mold, obtain friction force data in the mold through the friction force sensor arranged on the mold, and obtain pressure data in the mold through the pressure sensor arranged on the mold; and the upper computer preprocesses the temperature data, the friction force data and the pressure data, and performs curve representation and fault alarm on the three kinds of data. In order to meet the monitoring requirements of a composite material pultrusion process, a multi-parameter data acquisition and analysis method and system are developed, various indexes, such as temperature, pressure and friction force in a composite material pultrusion process forming mold, which influence the pultrusion process are monitored and obtained, and a reliable basis is provided for ensuring the quality of a product and optimizing a subsequent process.

Description

technical field [0001] The invention relates to the technical field of composite material pultrusion forming technology, in particular to a device and method for real-time monitoring of composite material pultrusion forming process parameters. Background technique [0002] The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art. [0003] Compared with traditional materials, composite materials have the advantages of high specific strength, high specific modulus, good fatigue resistance and corrosion resistance, and are widely used in aerospace, automobile, rail transit, shipbuilding, wind power generation and other fields. The composite material pultrusion molding process can carry out continuous composite material molding, and maintains the maximum comprehensive mechanical properties of the product in the fiber extension direction. Due to the excellent longitudinal mechanical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52
CPCB29C70/52Y02P90/02
Inventor 姜明顺马蒙源张雷张法业贾磊肖鹏孙琳
Owner SHANDONG UNIV
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