CN204202571U - A kind of non-contact type extensometer - Google Patents

A kind of non-contact type extensometer Download PDF

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Publication number
CN204202571U
CN204202571U CN201420674049.0U CN201420674049U CN204202571U CN 204202571 U CN204202571 U CN 204202571U CN 201420674049 U CN201420674049 U CN 201420674049U CN 204202571 U CN204202571 U CN 204202571U
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China
Prior art keywords
positioning unit
range cells
range
contact type
test specimen
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CN201420674049.0U
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Chinese (zh)
Inventor
曾胡
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HUNAN JIANYAN INFORMATION TECHNOLOGY Co Ltd
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HUNAN JIANYAN INFORMATION TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a kind of non-contact type extensometer, comprise distance measuring equipment and be fixed on the locating device on test specimen, locating device comprises the first positioning unit and the second positioning unit, distance measuring equipment comprises the first range cells and the second range cells that utilize locating device to carry out finding range, first range cells is set to towards the first positioning unit and the distance measured between the first range cells and the first positioning unit, and the second range cells is set to towards the second positioning unit and the distance measured between the second range cells and the second positioning unit.Technique effect of the present utility model is, adopt mechanical grip test specimen, laser non-contact distance-measurement mode measures the test specimen amount of extending, there is the advantage realizing laser, Video Extensometer function by mechano-electronic extensometer price, namely can measure the deflection in whole process of the test and automatically measure logarithmic strain, breaking elongation and percentage of total elongation.Can set arbitrarily original gauge length, gauge length error does not produce any impact to dependent variable, is specially adapted to large-scale promotion and is suitable for.

Description

A kind of non-contact type extensometer
Technical field
The utility model relates to a kind of non-contact type extensometer.
Background technology
Extensometer conventional at present comprises contact extensometer and the large classification of non-contact type extensometer two, wherein contact extensometer is generally mechanical grip formula, namely be fixed on mechanically on test specimen by extensometer when testing, when stretching, extensometer moves along with test specimen stretches the deflection obtaining test specimen simultaneously; And non-contact type extensometer is generally by video capture or laser scanning, front and after stretching the image that stretches is formed to test specimen, then image is carried out contrast the deflection obtaining test specimen.
These two kinds of extensometers are in the steel bar stretching test of building materials above, equal Shortcomings.The extensometer of mechanical grip formula installs inconvenience, and range difference needs different extensometers, and must take off extensometer before the fracture of test specimen reinforcing bar, otherwise very easily damage extensometer self, this also causes measuring the modification in whole process of the test.And the extensometer of existing video capture or laser scanning exists expensive, higher shortcoming is required to environment for use.
Utility model content
In order to solve the technical matters used in the test of the current extensometer inapplicable steel bar stretching at building materials, the utility model provides a kind of and conveniently installs and measures and the lower non-contact type extensometer of good stability, price and measuring method.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is,
A kind of non-contact type extensometer, comprise distance measuring equipment and be fixed on the locating device on test specimen, described locating device comprises the first positioning unit and the second positioning unit, described distance measuring equipment to be arranged between the first positioning unit and the second positioning unit and not to contact positioning unit, distance measuring equipment comprises the first range cells and the second range cells that utilize locating device to carry out finding range, and connect two range cells and fixed arm for fixing two range cells positions, the first described range cells is set to towards the first positioning unit and the distance measured between the first range cells and the first positioning unit, the second described range cells is set to towards the second positioning unit and the distance measured between the second range cells and the second positioning unit, the length of two range cells self is known.
Described a kind of non-contact type extensometer, also comprises backstay, and described backstay to be arranged between the first positioning unit and the second positioning unit and to connect two positioning units, and its length is known, and fixed arm connects backstay.
Described a kind of non-contact type extensometer, described backstay is the variable-length backstay being provided with length scale.
Described a kind of non-contact type extensometer, described positioning unit is the baffle plate being provided with stationary installation, and baffle plate to be fixed on test specimen by stationary installation and just to carry out reflection range finding to make range cells by baffle plate to range cells.
Described a kind of non-contact type extensometer, described stationary installation is holder.
Described a kind of non-contact type extensometer, described range cells is the one in laser range finder, infrared range-measurement system and microwave ranger.
Technique effect of the present utility model is, adopt mechanical grip test specimen, laser non-contact distance-measurement mode measures the test specimen amount of extending, there is the advantage realizing laser, Video Extensometer function by mechano-electronic extensometer price, namely can measure the deflection in whole process of the test and automatically measure logarithmic strain, breaking elongation and percentage of total elongation.Can set arbitrarily original gauge length, gauge length error does not produce any impact to dependent variable, is specially adapted to large-scale promotion and is suitable for.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model distance exam schematic diagram;
Fig. 3 is the utility model positioning unit schematic diagram;
1 be the first positioning unit, 2 be the second positioning unit, 3 be the first range cells, 4 be the second range cells, 5 be wherein fixed arm, 6 be backstay, 7 be baffle plate, 8 be holder, 9 be test specimen.
Embodiment
The utility model comprises distance measuring equipment and is fixed on the locating device on test specimen, locating device comprises the first positioning unit and the second positioning unit, distance measuring equipment to be arranged between the first positioning unit and the second positioning unit and not to contact positioning unit, distance measuring equipment comprises the first range cells and the second range cells that utilize locating device to carry out finding range, and connect two range cells and fixed arm for fixing two range cells positions, first range cells is set to towards the first positioning unit and the distance measured between the first range cells and the first positioning unit, second range cells is set to towards the second positioning unit and the distance measured between the second range cells and the second positioning unit, the length of two range cells self is known.
In order to realize making stadimeter reach optimum measurement effect in different measuring situation, also comprise backstay, backstay to be arranged between the first positioning unit and the second positioning unit and to connect two positioning units, and its length is known, and fixed arm connects backstay.
Conveniently adjust distance, backstay is the variable-length backstay being provided with length scale.
Positioning unit is the baffle plate being provided with stationary installation, and baffle plate to be fixed on test specimen by stationary installation and just to carry out reflection range finding to make range cells by baffle plate to range cells.Stationary installation is holder.Range cells is the one in laser range finder, infrared range-measurement system and microwave ranger.
The utility model measuring method comprises the following steps:
Step one: the locating device fixedly comprising the first positioning unit and the second positioning unit on test specimen, then the distance measuring equipment comprising the first range cells and the second range cells is set between two positioning units, and make the first range cells towards the first positioning unit, second range cells is towards the second positioning unit, and distance measuring equipment is contact positioning device not;
Step 2: the first range cells measures the distance L between itself and the first positioning unit d, the second range cells measures the distance L between itself and the second positioning unit e, then original gauge length L 0=L d+ L c+ L e, wherein L cbe two range cells its length sums;
Step 3: elongate test specimen, in drawing process, the distance L' between the first range cells and the first positioning unit measured by distance measuring equipment dand the second distance L' between range cells and the second positioning unit e, then the elongation of test specimen is L 1=L' d+ L' e+ L c-L 0
In order to realize making stadimeter reach optimum measurement effect in different measuring situation, be also provided with backstay, backstay connects the first range cells and the second range cells, and backstay is the variable-length backstay being provided with length scale, L cbe two range cells its length and backstay length sum.
Positioning unit is the baffle plate being provided with stationary installation, and baffle plate to be fixed on test specimen by stationary installation and just to carry out reflection range finding to make range cells by baffle plate to range cells, and stationary installation is holder.

Claims (6)

1. a non-contact type extensometer, it is characterized in that, comprise distance measuring equipment and be fixed on the locating device on test specimen, described locating device comprises the first positioning unit and the second positioning unit, described distance measuring equipment to be arranged between the first positioning unit and the second positioning unit and not to contact positioning unit, distance measuring equipment comprises the first range cells and the second range cells that utilize locating device to carry out finding range, and connect two range cells and fixed arm for fixing two range cells positions, the first described range cells is set to towards the first positioning unit and the distance measured between the first range cells and the first positioning unit, the second described range cells is set to towards the second positioning unit and the distance measured between the second range cells and the second positioning unit, the length of two range cells self is known.
2. a kind of non-contact type extensometer according to claim 1, it is characterized in that, also comprise backstay, described backstay to be arranged between the first positioning unit and the second positioning unit and to connect two positioning units, and its length is known, fixed arm connects backstay.
3. a kind of non-contact type extensometer according to claim 2, is characterized in that, described backstay is the variable-length backstay being provided with length scale.
4. a kind of non-contact type extensometer according to claim 1, it is characterized in that, described positioning unit is the baffle plate being provided with stationary installation, and baffle plate to be fixed on test specimen by stationary installation and just to carry out reflection range finding to make range cells by baffle plate to range cells.
5. a kind of non-contact type extensometer according to claim 4, is characterized in that, described stationary installation is holder.
6. a kind of non-contact type extensometer according to claim 1, is characterized in that, described range cells is the one in laser range finder, infrared range-measurement system and microwave ranger.
CN201420674049.0U 2014-11-12 2014-11-12 A kind of non-contact type extensometer Active CN204202571U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420674049.0U CN204202571U (en) 2014-11-12 2014-11-12 A kind of non-contact type extensometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420674049.0U CN204202571U (en) 2014-11-12 2014-11-12 A kind of non-contact type extensometer

Publications (1)

Publication Number Publication Date
CN204202571U true CN204202571U (en) 2015-03-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107782242A (en) * 2017-09-26 2018-03-09 西安交通大学 Main shaft axial direction thermal stretching measurement apparatus and method based on image processing techniques
CN107957373A (en) * 2017-12-21 2018-04-24 济南兰光机电技术有限公司 A kind of contactless puller system extensometer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107782242A (en) * 2017-09-26 2018-03-09 西安交通大学 Main shaft axial direction thermal stretching measurement apparatus and method based on image processing techniques
CN107957373A (en) * 2017-12-21 2018-04-24 济南兰光机电技术有限公司 A kind of contactless puller system extensometer

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