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

A kind of non-contact type extensometer Download PDF

Info

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
Authority
CN
China
Prior art keywords
positioning unit
range cells
range
contact type
test specimen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201420674049.0U
Other languages
Chinese (zh)
Inventor
曾胡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUNAN JIANYAN INFORMATION TECHNOLOGY Co Ltd
Original Assignee
HUNAN JIANYAN INFORMATION TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUNAN JIANYAN INFORMATION TECHNOLOGY Co Ltd filed Critical HUNAN JIANYAN INFORMATION TECHNOLOGY Co Ltd
Priority to CN201420674049.0U priority Critical patent/CN204202571U/en
Application granted granted Critical
Publication of CN204202571U publication Critical patent/CN204202571U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)

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

Family

ID=52660518

Family Applications (1)

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

Country Status (1)

Country Link
CN (1) CN204202571U (en)

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

Similar Documents

Publication Publication Date Title
EP2104023A3 (en) Method and apparatus at a touch sensitive device
CN204330208U (en) For detecting the force standard machines of pull and push dynamometer
CN103674834A (en) Rapid detection method for surface oxide scale adhesion of hot rolling strip steel
CN204202571U (en) A kind of non-contact type extensometer
CN204881602U (en) A device for measuring building engineering deformation of member
CN202938729U (en) Ranging rod for length and distance measurement by using angle
CN204388796U (en) A kind of thickness detection mechanism
CN204320811U (en) Section bar finished product length on-line measurement device
CN207907815U (en) Edge of Steel Strip wave on-line detector
CN204228146U (en) Automobile glass lifter pallets level degree measuring instrument
CN204085406U (en) A kind of bulk pick-up unit for stake body
CN207007233U (en) A kind of detection quality device of skyscraper
CN103323282A (en) Tower crane safety assessment method and assessment equipment thereof
CN205719914U (en) A kind of peel strength test fixture
CN204461736U (en) Parking brake pick-up unit
CN207798073U (en) A kind of concrete column testing apparatus for verticality
CN203405147U (en) Measuring tool specially used for detecting stand hole of iron seat
CN208998741U (en) A kind of portable Crack Monitoring instrument
CN207407831U (en) A kind of electrolytic copper foil angularity measuring device
CN202494642U (en) Intelligentization detector for support and expansion joint
CN103776334A (en) Rapid detection tool at any angle
CN205049121U (en) Wind channel measurement tester
CN204405514U (en) A kind of portable pendulum tester device installing fan angle device
CN205103115U (en) Sample wafer tested is carried out hardness of macromolecular material and tensile strength
CN204240962U (en) A kind of portable flatness pick-up unit

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant