CN201449356U

CN201449356U - Device for measuring breaking elongation of foamed materials

Info

Publication number: CN201449356U
Application number: CN2009200313284U
Authority: CN
Inventors: 李海帆; 赵同凯; 王霞
Original assignee: YANTAI ZHENGHAI AUTOMOTIVE INTERIOR CO Ltd
Current assignee: Yantai Zheng Hai He Tai Science and Technology Co., Ltd.
Priority date: 2009-08-07
Filing date: 2009-08-07
Publication date: 2010-05-05
Anticipated expiration: 2019-08-07

Abstract

The utility model discloses a device for measuring breaking elongation of low-strength foamed materials. The device comprises a tensile strength tester on which an upper clamp and a lower clamp are arranged and used for clamping a sample (1), and is characterized in that one side of the sample (1) is provided with a graduated scale (2); and a pedestal and a handpiece are respectively provided with a camera (3) and the lenses of the two cameras (3) respectively correspond to two marked lines on the sample (1). The device also comprises a computer capable of storing and displaying video data shot and recorded by the cameras (3). Without adopting an extensometer, the device causes the measurement result of materials to be exact. Due to the adoption of video recording and no other artificial acting force except tensile force applied on the sample, the tensile status is natural and can reflect the intrinsic property of materials.

Description

A kind of measurement mechanism of breaking elongation of foam materials

Technical field:

The utility model relates to the field of measuring technique of material breaking elongation, is a kind of measurement mechanism of low-intensity breaking elongation of foam materials specifically.

Background technology:

At present, when adopting tension tester to measure the breaking elongation of material, need become dumbbell shape to the sample stamping-out usually, produce measuring error because of clamping to prevent material.So need be fixed on scribing position to extensometer then in the zone line line of sample, understand the length variations of the material in the scribe area in the drawing process by extensometer.

But, the material of a lot of foam classes is arranged, the intensity of itself is very low, and extensometer is difficult on the sample fixing, and can influence the measurement result of material.

Summary of the invention:

The purpose of this utility model is the deficiency that overcomes above-mentioned prior art, and a kind of measurement mechanism of low-intensity breaking elongation of foam materials is provided, extensometer is difficult on the sample fixing and influence the problems such as measurement result of material when mainly solving existing low-intensity breaking elongation of foam materials and measuring.

The technical solution of the utility model is: a kind of measurement mechanism of breaking elongation of foam materials, it comprises tension tester, last anchor clamps and lower clamp are arranged on the tensile test, last anchor clamps and lower clamp are used for the clamping sample, its special character is in a side of sample rule to be set, establish camera on pedestal and head respectively, the camera lens of two cameras is corresponding with two line on the corresponding sample respectively, guarantees that two line are consistent within the visual field of camera in the drawing process; And the computer of storage video data that camera is shot with video-corder, this computer comprises display device, and the necessary software of display video material.

In order to improve the degree of accuracy of reading, the translucent mirror of a slice is set between sample and rule, sample and rule be mirror image each other, camera and rule are positioned at the homonymy of mirror, therefore rule and sample are overlapping on the image that camera is taken, the convenience and the accuracy that can improve reading.

Compared with the prior art the measurement mechanism of a kind of breaking elongation of foam materials described in the utility model has following good effect: 1, do not adopt extensometer, thereby solved extensometer and on low-intensity foamed material sample, be difficult to fixing problem, made the measurement result of material accurate; 2, because computer stores video data, can analyze frame by frame, so can accurately hold the fracture pulled out condition of moment on the time afterwards; 3, because adopt the method for video record, do not applying other artificial acting forces that draw outside stretching on the sample, so extended state is a nature, characteristic that can reaction material itself.

Description of drawings:

Fig. 1 is the utility model is directly shot with video-corder rule and sample with camera a synoptic diagram;

Fig. 2 is the utility model is shot with video-corder rule and sample by translucent mirror with camera a synoptic diagram.

Embodiment:

In order to understand better and to implement, provide the measurement mechanism that specific embodiment describes a kind of breaking elongation of foam materials of the utility model in detail below in conjunction with accompanying drawing.

Embodiment 1, referring to Fig. 1, be processed into tension tester, last anchor clamps and lower clamp are arranged on the tension tester, last anchor clamps and lower clamp are used for clamping sample 1, at the side fixed installation rule 2 of sample 1, corresponding with two line on the sample 1 respectively at the camera lens that 3, two cameras 3 of camera are installed respectively on pedestal and the head; Can store and show the computer of camera 3 video data of shooting with video-corder.

During use, at first sample 1 stamping-out is become the dumbbell shape of measurement standard requirement, the parallel lines of two stripe pitch 50mm (standard and employed sampling instrument according to institute's foundation can be different) are drawn in the uniform zone of width in the middle, sample 1 on tension tester, clip on the lower clamp, a rule 2 is set on the next door of sample 1, simultaneously on the pedestal of tension tester and head, a camera 3 is set respectively, be used for respectively two on the sample pairing scales of line are made a video recording, adjust the position of camera, guarantee that the line on the sample 1 can both be shot with video-corder picture clearly with the scale on the rule, can increase the brightness of sample and rule when needing by lighting device, allow following line be positioned at the bottom in following camera 3 visuals field, top line is positioned at the top in top camera 3 visuals field, guarantees that with this line can not move to outside the visual field of camera in drawing process;

The signal of camera is linked on the computer, before beginning to stretch, opens the video recording of camera earlier, after sample fracture, stop the video recording of camera; After the off-test, transfer the image data that two cameras are shot with video-corder, read the pairing scale of line on the sample before beginning to stretch, calculate the width between the line, seek the preceding last frame image of sample fracture, read the pairing scale of line on the sample, calculate the distance between the line; Before the fracture on the last frame image distance between the line deduct stretch before on the sample distance between the line obtain elongation at break, elongation at break obtains the breaking elongation of this material divided by the distance between the line before beginning to stretch.

Embodiment 2, referring to Fig. 2, with embodiment 1, difference is that translucent mirror 4 is installed between sample 1 and rule 2, sample 1 and rule 2 be mirror image each other, and camera 3 and rule 2 are positioned at the homonymy of mirror 4, and rule 2 is overlapping on the image that camera 3 is taken with sample 1.

During use, at first sample 1 stamping-out is become the dumbbell shape of measurement standard requirement, the regional uniformly parallel lines of drawing two stripe pitch 50mm (standard and employed sampling instrument according to institute's foundation can be different) of width clip sample 1 on the upper and lower anchor clamps of tension tester in the middle; On the parallel position of sample 1 front and sample 1, the semi-transparent plane mirror 4 of crossing half reflection of a slice is set, in position a rule 2 is set then with sample 1 and mirror 4 symmetries, on the pedestal of tension tester and head, a camera 3 is set respectively, guarantee to occur in the visual field sharp image that sample 1 and rule 2 coincide, in needs, sample 1 and rule 2 are thrown light on to improve brightness, and guarantee that in the visual field of superincumbent camera, the line on the sample is positioned at the top in the visual field; In the visual field of following camera, the line on the sample is positioned at the bottom in the visual field, prevents that with this line on the sample moves to outside the visual field of camera in drawing process;

Identical with the method for reading data of embodiment 1, but because the line on the sample overlaps in the visual field with scale on the rule, so can improve the convenience and the accuracy of reading.

The measurement mechanism of a kind of breaking elongation of foam materials of the present utility model because computer stores Video Document, can be analyzed afterwards frame by frame, so can accurately hold the fracture pulled out condition of moment on the time; Because adopt the method for video record, do not applying other acting forces of thinking that draw outside stretching on the sample, so extended state is a nature, characteristic that can reaction material itself.

Claims

1. the measurement mechanism of a breaking elongation of foam materials, it comprises tension tester, last anchor clamps and lower clamp are arranged on the tension tester, last anchor clamps and lower clamp are used for clamping sample (1), it is characterized in that rule (2) being set in a side of sample (1), establish camera (3) on pedestal and head respectively, the camera lens of two cameras (3) is corresponding with two line on the sample (1) respectively; And the computer that can store and show camera (3) video data of shooting with video-corder.

2. the measurement mechanism of a kind of breaking elongation of foam materials according to claim 1, it is characterized in that establishing translucent mirror (4) between described sample (1) and the rule (2), sample (1) and rule (2) be mirror image each other, camera (3) and rule (2) are positioned at the homonymy of mirror (4), and rule (2) is overlapping on the image that camera (3) is taken with sample (1).