CN109708963A - A kind of new method improving resistance dynamometer prediction elastic modulus of timber component accuracy rate - Google Patents
A kind of new method improving resistance dynamometer prediction elastic modulus of timber component accuracy rate Download PDFInfo
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- CN109708963A CN109708963A CN201810604177.0A CN201810604177A CN109708963A CN 109708963 A CN109708963 A CN 109708963A CN 201810604177 A CN201810604177 A CN 201810604177A CN 109708963 A CN109708963 A CN 109708963A
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Abstract
The invention discloses a kind of new methods of raising resistance dynamometer prediction elastic modulus of timber component accuracy rate, it is related to engineering material field of measuring technique, the method of the present invention including the following steps: step 1, first, wooden component both sides to be measured are clamped by fixture, adjustment fixture keeps the tested surface of the wooden component to be measured to be in horizontal or vertical position, stationary fixture again, step 2, several measurement points are chosen in the wooden component tested surface and are marked, displacement sensor is aligned with measurement point initial position, it returns to zero after displacement sensor is fixed, by the push rod of resistance dynamometer perpendicular to the wooden component tested surface, the present invention carries out the detection of face contact stress by exerting a force to the wooden component single side, stress is simple, resistance curve is more smooth, using range sensor measurement stress surface measurement point displacement, precisely represent deformation quantity, and carry out multiple groups measurement, it avoids Measurement fault, reduces measurement error, improves elastic modulus of timber component measurement accuracy rate.
Description
Technical field
The invention belongs to engineering material field of measuring technique, predict the wooden component elasticity more particularly to a kind of raising resistance dynamometer
The new method of modulus accuracy rate.
Background technique
Elasticity modulus, which can be considered, measures the index that material generates flexible deformation complexity, and value is bigger, makes material
The stress of certain flexible deformation is also bigger, i.e., material stiffness is bigger, that is, under certain stress, and flexible deformation occurs and gets over
It is small.Currently, resistance dynamometer is because it is strong with portability, detection range is wide, accuracy is high and simple operation and other advantages, and answered extensively
Detection and prospecting etc. for wood performance.When art methods measure elastic modulus of timber component, using penetration resistance
Test, due to complicated in the wooden component inside stress, the resistance curve obtained is complex, also, also because suffered component is more,
The wooden component is more the case where there may be deformation, and injection ranging can not represent the wooden component deformation quantity, therefore, leads to the wooden component bullet
Property modulus measurement accuracy is not very high.
Summary of the invention
The purpose of the present invention is to provide a kind of new methods of raising resistance dynamometer prediction elastic modulus of timber component accuracy rate, subtract
Small elastic modulus of timber component measurement error improves measurement accuracy rate.
The present invention is achieved by the following technical solutions:
The present invention is a kind of new method of raising resistance dynamometer prediction elastic modulus of timber component accuracy rate, and the method includes following several
A step:
Step 1: firstly, wooden component both sides to be measured are clamped by fixture, adjustment fixture keeps the to be measured of the wooden component to be measured
Face is in horizontal or vertical position, then stationary fixture, fixture select can horizontal or vertical adjustable range function fixture；
Step 2: choosing at least two measurement points in the wooden component tested surface and marking, the adjacent distance between two points of measurement point is not less than
Displacement sensor is aligned by 10mm with measurement point initial position, returns to zero after displacement sensor is fixed, the push rod of resistance dynamometer is hung down
Directly in the wooden component tested surface, by push rod and any one measurement point alignment, and push the wooden component that small distance deformation, resistance occurs
Instrument push rod diameter is within the scope of 5mm-10mm, and within the scope of 10mm-30mm, displacement sensor can be the distance of small distance deformation
Strain-type sensor, inductive displacement transducer, differential transformer displacement transducer, eddy current type displacement sensor and suddenly
Any one in your displacement sensor；
Step 3: reading the displacement data of displacement sensor detection, handled using resistance curve figure of the computer to formation,
According to the area that curve graph transverse and longitudinal coordinate axis and resistance curve are enclosed, its vector quantization and closureization are handled, and calculate its face
Product, displacement data, the resistance curve area of pictural surface are recorded；
Step 4: repeating step 2 and step 3 until having surveyed all measurement point datas, each group measurement data is recorded；
Step 5: measurement push rod face area size and measurement point wood component thickness, according to displacement data, the resistance curve area of pictural surface
It calculates with push rod face area for each group measurement point elasticity modulus, is calculated according to following formula:
E=(F/S)/(dL/L),
In formula, E represents Young's modulus of elasticity, and F represents the resistance curve area of pictural surface, and S represents push rod face area, and dL, which is represented, moves sensing
The displacement data of device detection is the wooden component deformation quantity, and L represents measurement point wood component thickness, after measuring every group of elasticity modulus, summation
Average value, which is acquired, divided by a group number again obtains elastic modulus of timber component.
The invention has the following advantages:
The present invention carries out the detection of face contact stress by exerting a force to the wooden component single side, and stress is simple, and resistance curve is more smooth, adopts
With range sensor measurement stress surface measurement point displacement, deformation quantity is precisely represented, and carry out multiple groups measurement, avoid measurement
Fault, reduces measurement error, improves elastic modulus of timber component measurement accuracy rate.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without creative efforts, belongs to guarantor of the present invention
The range of shield.
Embodiment one
Including the following steps:
Step 1: firstly, wooden component both sides to be measured are clamped by fixture, adjustment fixture keeps the to be measured of the wooden component to be measured
Face is in horizontal or vertical position, then stationary fixture, fixture select can horizontal or vertical adjustable range function fixture；
Step 2: choosing four measurement points in the wooden component tested surface and marking, the adjacent distance between two points of measurement point is 20mm, will be displaced
Sensor is aligned with measurement point initial position, is returned to zero after displacement sensor is fixed, by the push rod of resistance dynamometer perpendicular to the wooden component
Tested surface by push rod and any one measurement point alignment, and pushes the wooden component that small distance deformation, resistance dynamometer push rod diameter occurs
For 6mm, for the distance of small distance deformation within the scope of 10mm-30mm, displacement sensor selects hall displacement transducer；
Step 3: reading the displacement data of displacement sensor detection, handled using resistance curve figure of the computer to formation,
According to the area that curve graph transverse and longitudinal coordinate axis and resistance curve are enclosed, its vector quantization and closureization are handled, and calculate its face
Product, displacement data, the resistance curve area of pictural surface are recorded；
Step 4: repeating step 2 and step 3 until having surveyed all measurement point datas, each group measurement data is recorded；
Step 5: measurement push rod face area size and measurement point wood component thickness, according to displacement data, the resistance curve area of pictural surface
It calculates with push rod face area for each group measurement point elasticity modulus, is calculated according to following formula:
E=(F/S)/(dL/L),
In formula, E represents Young's modulus of elasticity, and F represents the resistance curve area of pictural surface, and S represents push rod face area, and dL, which is represented, moves sensing
The displacement data of device detection is the wooden component deformation quantity, and L represents measurement point wood component thickness, after measuring every group of elasticity modulus, summation
Average value, which is acquired, divided by a group number again obtains elastic modulus of timber component.
Embodiment two
Including the following steps:
Step 1: firstly, wooden component both sides to be measured are clamped by fixture, adjustment fixture keeps the to be measured of the wooden component to be measured
Face is in horizontal or vertical position, then stationary fixture, fixture select can horizontal or vertical adjustable range function fixture；
Step 2: choosing eight measurement points in the wooden component tested surface and marking, the adjacent distance between two points of measurement point is 20mm, will be displaced
Sensor is aligned with measurement point initial position, is returned to zero after displacement sensor is fixed, by the push rod of resistance dynamometer perpendicular to the wooden component
Tested surface by push rod and any one measurement point alignment, and pushes the wooden component that small distance deformation, resistance dynamometer push rod diameter occurs
For 10mm, for the distance of small distance deformation within the scope of 10mm-30mm, displacement sensor selects hall displacement transducer；
Step 3: reading the displacement data of displacement sensor detection, handled using resistance curve figure of the computer to formation,
According to the area that curve graph transverse and longitudinal coordinate axis and resistance curve are enclosed, its vector quantization and closureization are handled, and calculate its face
Product, displacement data, the resistance curve area of pictural surface are recorded；
Step 4: repeating step 2 and step 3 until having surveyed all measurement point datas, each group measurement data is recorded；
Step 5: measurement push rod face area size and measurement point wood component thickness, according to displacement data, the resistance curve area of pictural surface
It calculates with push rod face area for each group measurement point elasticity modulus, is calculated according to following formula:
E=(F/S)/(dL/L),
In formula, E represents Young's modulus of elasticity, and F represents the resistance curve area of pictural surface, and S represents push rod face area, and dL, which is represented, moves sensing
The displacement data of device detection is the wooden component deformation quantity, and L represents measurement point wood component thickness, after measuring every group of elasticity modulus, summation
Average value, which is acquired, divided by a group number again obtains elastic modulus of timber component.
Embodiment three
Including the following steps:
Step 1: firstly, wooden component both sides to be measured are clamped by fixture, adjustment fixture keeps the to be measured of the wooden component to be measured
Face is in horizontal or vertical position, then stationary fixture, fixture select can horizontal or vertical adjustable range function fixture；
Step 2: choosing five measurement points in the wooden component tested surface and marking, the adjacent distance between two points of measurement point is 30mm, will be displaced
Sensor is aligned with measurement point initial position, is returned to zero after displacement sensor is fixed, by the push rod of resistance dynamometer perpendicular to the wooden component
Tested surface by push rod and any one measurement point alignment, and pushes the wooden component that small distance deformation, resistance dynamometer push rod diameter occurs
For 5mm, for the distance of small distance deformation within the scope of 10mm-30mm, displacement sensor selects hall displacement transducer；
Step 3: reading the displacement data of displacement sensor detection, handled using resistance curve figure of the computer to formation,
According to the area that curve graph transverse and longitudinal coordinate axis and resistance curve are enclosed, its vector quantization and closureization are handled, and calculate its face
Product, displacement data, the resistance curve area of pictural surface are recorded；
Step 4: repeating step 2 and step 3 until having surveyed all measurement point datas, each group measurement data is recorded；
Step 5: measurement push rod face area size and measurement point wood component thickness, according to displacement data, the resistance curve area of pictural surface
It calculates with push rod face area for each group measurement point elasticity modulus, is calculated according to following formula:
E=(F/S)/(dL/L),
In formula, E represents Young's modulus of elasticity, and F represents the resistance curve area of pictural surface, and S represents push rod face area, and dL, which is represented, moves sensing
The displacement data of device detection is the wooden component deformation quantity, and L represents measurement point wood component thickness, after measuring every group of elasticity modulus, summation
Average value, which is acquired, divided by a group number again obtains elastic modulus of timber component.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (5)
1. a kind of new method for improving resistance dynamometer prediction elastic modulus of timber component accuracy rate, it is characterised in that: the method includes
Following steps:
Step 1: firstly, wooden component both sides to be measured are clamped by fixture, adjustment fixture keeps the to be measured of the wooden component to be measured
Face is in horizontal or vertical position, then stationary fixture；
Step 2: choosing several measurement points in the wooden component tested surface and marking, by displacement sensor and measurement point initial position pair
Together, it returns to zero after displacement sensor being fixed, by the push rod of resistance dynamometer perpendicular to the wooden component tested surface, by push rod and any one survey
Point alignment is measured, and pushes the wooden component that small distance deformation occurs；
Step 3: reading the displacement data of displacement sensor detection, handled using resistance curve figure of the computer to formation,
And its area is calculated, displacement data, the resistance curve area of pictural surface are recorded；
Step 4: repeating step 2 and step 3 until having surveyed all measurement point datas；
Step 5: measurement push rod face area size and measurement point wood component thickness, according to displacement data, the resistance curve area of pictural surface
It calculates with push rod face area for each group measurement point elasticity modulus, is finally averaged and obtains elastic modulus of timber component.
2. a kind of new method for improving resistance dynamometer prediction elastic modulus of timber component accuracy rate according to claim 1, special
Sign is that resistance dynamometer push rod diameter is within the scope of 5mm-10mm in the step 2, and the distance of small distance deformation is in 10mm-30mm
In range.
3. a kind of new method for improving resistance dynamometer prediction elastic modulus of timber component accuracy rate according to claim 1, special
Sign is that displacement sensor can be strain-type sensor, inductive displacement transducer, differential transformation in the step 2
Any one in device formula displacement sensor, eddy current type displacement sensor and hall displacement transducer.
4. a kind of new method for improving resistance dynamometer prediction elastic modulus of timber component accuracy rate according to claim 1, special
Sign is that the resistance curve area of pictural surface refers to the area that transverse and longitudinal coordinate axis and resistance curve are enclosed in the step 3.
5. a kind of new method for improving resistance dynamometer prediction elastic modulus of timber component accuracy rate according to claim 1, special
Sign is, the adjacent distance between two points of several measurement points is not less than 10mm, and the measurement point quantity is no less than two o'clock.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5602329A (en) * | 1995-08-09 | 1997-02-11 | Massachusetts Institute Of Technology | Method and apparatus for measuring fracture toughness of a material |
| CN101639428A (en) * | 2009-07-24 | 2010-02-03 | 中国林业科学研究院木材工业研究所 | Rapid resistance detection method of elastic modulus of timber component in historic building timber structure |
| CN102175769A (en) * | 2010-12-13 | 2011-09-07 | 北京林业大学 | Nondestructive detection method for mechanical properties of larch component material of historic building |
-
2018
- 2018-06-13 CN CN201810604177.0A patent/CN109708963A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5602329A (en) * | 1995-08-09 | 1997-02-11 | Massachusetts Institute Of Technology | Method and apparatus for measuring fracture toughness of a material |
| CN101639428A (en) * | 2009-07-24 | 2010-02-03 | 中国林业科学研究院木材工业研究所 | Rapid resistance detection method of elastic modulus of timber component in historic building timber structure |
| CN102175769A (en) * | 2010-12-13 | 2011-09-07 | 北京林业大学 | Nondestructive detection method for mechanical properties of larch component material of historic building |
Non-Patent Citations (1)
| Title |
|---|
| 孙燕良等: "基于微钻阻力的落叶松弹性模量快速检测", 《湖北农业科学》 * |
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Application publication date: 20190503 |