CN201816214U

CN201816214U - Thickness on-line detection sensor used during plastic film preparation process with casting method

Info

Publication number: CN201816214U
Application number: CN2010201824186U
Authority: CN
Inventors: 韩军; 张维光; 于洵; 尚小燕
Original assignee: Xian Technological University
Current assignee: Xian Technological University
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2011-05-04
Anticipated expiration: 2020-04-30

Abstract

The utility model relates to a thickness on-line detection sensor which is used during plastic film preparation process with a casting method. The utility model aims to overcome the problem that in the prior art, the thickness during the plastic film manufacturing process with the casting method can not be provided. The utility model provides the thickness sensor which is used during the plastic film preparation process with the casting method, which comprises a laser beam transmitting module, a light beam receiving module and a processing module, wherein the light beam receiving module is positioned on the reflected light path of the transmitting light path of the laser beam transmitting module; the laser beam transmitting module comprises a laser diode and a collimation lens system, the light beam receiving module comprises a receiving lens system and a light spot position detector, and the processing module is respectively and electrically connected with the laser diode and the light spot position detector. The thickness sensor of the utility model is an optical triangulation thickness sensor device, and can accurately obtain the thickness of the plastic film through resolving the geometrical relationship of two triangle optical paths, and the utility model is also suitable for the measurement of the thickness of a transparent or semitransparent object.

Description

Thickness detecting line sensor in a kind of hydrostomia method plastic film preparation process

Technical field:

The utility model relates to the online measuring technique field in the industrial products processing process, be specifically related to use the thickness online measuring technique field in the hydrostomia method production plastic film process, thickness detecting line sensor in particularly a kind of hydrostomia method plastic film preparation process.

Background technology:

In the hydrostomia method plastic film production process, THICKNESS CONTROL is an important step.The product specification of plastic film is a foundation with its thickness.In batch production process, require a collection of product plastic film thickness to be in the same range of product size.Plastic film batching flows out from the hydrostomia mouth, be through the solvent processes such as oven dry of volatilizing naturally.In process of production, the thickness of plastic film is in continuous variation, and the plastic film thickness during following being with is not only relevant with the batching of plastic film, and relevant with the technological parameter in the hydrostomia process.Thickness on the domestic hydrostomia method plastic film production line detects control and finishes by two kinds of methods, the thickness of product was according to the parameter of adjusting in the production process when a kind of method was following being with, another kind method is the experience by long-term accumulation, the thickness experience of hub plastic film ground judges that whether qualified the thickness of product is behind hydrostomia mouth and the steel band, and the quality control of product is had tangible hysteresis quality and empirical.Plastic film batching flows out to from the hydrostomia mouth that the time of steel band has three or four hours to not waiting more than the twenty four hours under the product, if the undesirable adjusting process again of product thickness parameter when being with down, production efficiency is low and can cause the raw-material waste of production, increases production cost.The plastic film batching that flows out from the hydrostomia mouth is a translucent thick object, measure its thickness and can not use contact measurement method.Depend on the steel band after plastic film flows out from the hydrostomia mouth in addition and travel forward with certain speed, the size of movement velocity is relevant with the specification of production plastic film.From whole plastic film production procedure, the plastic film batching flows out the intermediate link that is in whole process of production from the hydrostomia mouth.Whether qualified plastic film thickness with hydrostomia mouth place is foundation, not only can study the relation between the technological parameter in it and the hydrostomia process, and can make product judgement.The measuring method of plastic film thickness is significant to the quality control and the optimization plastic film production technology of plastic film production in the research hydrostomia process.

The utility model content:

The thickness transducer that uses in a kind of hydrostomia method plastic film production process that the utility model will provide is to overcome the problem that thickness in the hydrostomia method plastic film production process can't be provided that prior art exists.

For overcoming the problem that prior art exists, the technical scheme that the utility model provides is: the thickness transducer that uses in a kind of hydrostomia method plastic film preparation process, comprise laser beam transmitter module, light beam receiver module and processing module, described light beam receiver module is positioned at the beam emissions module and sends on the reflected light path of light path; Described laser beam transmitter module comprises laser diode and collimation lens set, and described light beam receiver module comprises receiver lens group and facula position detector, and processing module is electrically connected with laser diode and facula position detector respectively.

Above-mentioned collimation lens set comprises first collimation lens set and second collimation lens set, and described receiver lens group comprises first set of lenses and second set of lenses.

Above-mentioned facula position detector is PSD or CCD light sensor.

Thickness transducer in the utility model is an optical triangulation method thickness transducer spare, its with beam of laser in the folded light beam of plastic film upper and lower surface as measuring beam, directly obtain plastic film thickness measure result.The employed measuring beam of the utility model is the folded light beam of a branch of collimated laser beam in the plastic film upper and lower surface, these two light beams overlap the position of projection on steel band substantially, simultaneously detected on the facula position detector is the position of two hot spots, guarantee that like this from the light path of plastic film upper surface record and the light path of its lower surface record be synchronization, can obtain plastic film thickness exactly by the geometrical relationship of resolving two triangle light paths.The utility model uses an outgoing beam to form two trigonometry displacement measurement light paths, surveys the steel strip surface position for one, surveys the plastic film surface location for one, obtains the method for plastic film thickness by the difference of two displacements, and the measurement data error is little.Solve the laser facula that uses the dibit displacement sensor to carry out plastic film upper and lower surface in the similar measuring process simultaneously and can not keep the problem of aiming at any time.Some passes through plastic film inside owing to measure the steel strip surface light path, and its light path geometrical relationship clearing are relevant with the plastic film refractive index.The plastic film refractive index is proofreaied and correct by scaling method the influence of measuring thickness.Plastic film from thick to complete in the solidification process its change of refractive can ignore to plastic film thickness measure result's influence.The utility model is applicable to the measurement of transparent or semitransparent object thickness.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Description of reference numerals is as follows:

The 1-laser diode, 2-first collimation lens set, 3-steel band, 4-plastic film, 5-outgoing beam, 6-measuring beam, 7-first set of lenses, 8-facula position detector, 9-control and collecting unit, 10-second collimation lens set, 11-second set of lenses.

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is described in detail.

Referring to Fig. 1.The thickness transducer that uses in a kind of hydrostomia method plastic film preparation process comprises laser beam transmitter module, light beam receiver module and processing module 9, and said light beam receiver module is positioned at the beam emissions module and sends on the reflected light path of light path.Said laser beam transmitter module comprises laser diode 1 and collimation lens set, and collimation lens set is made of first collimation lens set 2 and second collimation lens set 10; Said light beam receiver module comprises receiver lens group and facula position detector 8, and the receiver lens group is made of first set of lenses 7 and second set of lenses 11, and the facula position detector 8 here is the CCD light sensor.Said processing module 9 is electrically connected with laser diode 1 and facula position detector 8 respectively.

Said processing unit 9 is based on hardware circuit and the operating sensor control of DSP and FPGA, comprises data solver data communication scheduling algorithm program, can adjust and finish data acquisition function to laser beam intensity.

In the use, the size of data that the sample frequency of sensor and single-point acquiring send can be provided with according to steel band speed forward.Precise motion mechanical systems such as employing slide rail drive senser element and move back and forth in plastic film width 200～600mm scope, and in the plastic film width range, the number of the sampled point of data can and detect according to product specification and require be provided with.In the actual measurement process, mechanical device drives the displacement sensing device and do motion fast between the point of sampling location, and is static relatively when sampling.Sensing data sends to computer by sensor communication interfaces and correspondingly handles.

Claims

1. thickness detecting line sensor in the hydrostomia method plastic film preparation process, it is characterized in that: comprise laser beam transmitter module, light beam receiver module and processing module (9), described light beam receiver module is positioned at the beam emissions module and sends on the reflected light path of light path; Described laser beam transmitter module comprises laser diode (1) and collimation lens set, described light beam receiver module comprises receiver lens group and facula position detector (8), and processing module (9) is electrically connected with laser diode (1) and facula position detector (8) respectively.

2. thickness detecting line sensor in the hydrostomia method plastic film preparation process according to claim 1, it is characterized in that: described collimation lens set comprises first collimation lens set (2) and second collimation lens set (10), and described receiver lens group comprises first set of lenses (7) and second set of lenses (11).

3. thickness detecting line sensor in the hydrostomia method plastic film preparation process according to claim 1 is characterized in that: described facula position detector (8) is PSD or CCD light sensor.