CN109813608A - A method of steel wire Young's modulus is surveyed using polar distance formula capacitance sensor - Google Patents
A method of steel wire Young's modulus is surveyed using polar distance formula capacitance sensor Download PDFInfo
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- CN109813608A CN109813608A CN201910062620.0A CN201910062620A CN109813608A CN 109813608 A CN109813608 A CN 109813608A CN 201910062620 A CN201910062620 A CN 201910062620A CN 109813608 A CN109813608 A CN 109813608A
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- steel wire
- capacitance sensor
- distance formula
- polar distance
- modulus
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Abstract
The invention discloses a kind of methods for surveying steel wire Young's modulus using polar distance formula capacitance sensor, using polar distance formula capacitance sensor, signal converter amplifier circuit, A/D converter, controller, D/A converter, drive module and display combine mode, the voltage signal changed by polar distance formula capacitance sensor, after voltage signal is converted into digital signal by the analog signal of the conversion of signal converter amplifier circuit and amplification and A/D converter, pass to controller, controller calculates the dependent variable of steel wire to be measured, then controller combines the stress value applied, the Young's modulus of the steel wire is calculated；It is converted into analog signal finally by the digital signal of D/A converter, is shown after drive module is handled in display.The configuration of the present invention is simple, it is easy to operate, it calculates and measures without artificial, it is only necessary to determine the Young's modulus that can obtain tested steel wire by display to the stress value that steel wire applies.
Description
Technical field
It is specifically a kind of to be surveyed using polar distance formula capacitance sensor the present invention relates to a kind of method for surveying steel wire Young's modulus
The method of steel wire Young's modulus.
Background technique
It is being surveyed in Experiment of College Physics using the principle of optical lever amplification Chroococcus minutus come the Young's modulus of measuring steel wire
During amount out of telescope from reflecting mirror, focusing handwheel is adjusted, until cross hair understands that alignment scale is reflected by optical lever
A certain scale out, then increases counterweight in order, the variation of scale from telescope, and records scale value with this,
Then with the average value for finding out scale label difference by poor method, it is computed the Young's modulus for finding out steel wire.But to observe small stretch
Long amount needs to adjust telescope, adds counterweight to beat easily and puts down gently, observes data after stablizing to steel wire again, and eyes are wanted when observing scale
Face telescope fluctuated must not cause error, this process will usually devote a tremendous amount of time, and operate extremely inconvenience.
Summary of the invention
Steel wire is surveyed using polar distance formula capacitance sensor in view of the above existing problems in the prior art, the present invention provides a kind of
The method of Young's modulus, structure is simple, easy to operate, calculates and measures without artificial, it is only necessary to determine the stress applied to steel wire
Value can obtain the Young's modulus of tested steel wire by display.
To achieve the goals above, the technical solution adopted by the present invention is that: it is a kind of using polar distance formula capacitance sensor survey
The method of steel wire Young's modulus, specific steps are as follows:
A, Young's modulus is first measured to steel wire using optical lever measuring device, record in test process the stress value that applies and
The dependent variable of steel wire；
B, by polar distance formula capacitance sensor on guide rail, then step A has been surveyed to one end and the polar distance formula of steel wire
The movable plate of capacitance sensor is fixedly connected, and the other end and hook for having surveyed steel wire connect, then polar distance formula capacitance sensor, letter
Number converter amplifier circuit, A/D converter, controller, D/A converter, drive module and display are sequentially connected by data line,
Controller receives the voltage signal of initial polar distance formula capacitance sensor by signal converter amplifier circuit and A/D converter, makees
Based on value stored；
C, counterweight is added on hook and applies the stress value recorded in step A to steel wire has been surveyed, and controller passes through letter at this time
Number converter amplifier circuit and A/D converter receive the real-time voltage signal of current polar distance formula capacitance sensor, and controller will be real
When voltage signal and the basic value of step B storage do difference, then calculate the ratio of dependent variable in the difference and step A, finally
Obtain the relationship between voltage variety and dependent variable；
D, the movable plate for having surveyed steel wire and polar distance formula capacitance sensor and hook are split, and makes the both ends point of steel wire to be measured
It is not connected with the movable plate of polar distance formula capacitance sensor and hook, counterweight is added on hook, stress is applied to steel wire to be measured, and
By the stress value input controller, while controller reads the real-time voltage signal of current polar distance formula capacitance sensor, control
The basic value of real-time voltage signal and step B storage is done difference by device processed, is obtained current voltage variety, is then transferred step
Dependent variable of the steel wire to be measured under current stress value is calculated in relationship between the voltage variety that C is obtained and dependent variable；Most
The Young of the steel wire to be measured is calculated according to Young's modulus formula by current stress value and current dependent variable for controller afterwards
Modulus；
E, after the Young's modulus that controller obtains step D is by D/A converter and drive module processing, it is sent to display
Device is shown.
Further, the polar distance formula capacitance sensor is differential type.
Further, the controller is single-chip microcontroller.
Further, the display is liquid crystal display.
Compared with existing optical lever measurement method, the present invention is using polar distance formula capacitance sensor, signal conversion amplification
Circuit, A/D converter, controller, D/A converter, drive module and display combine mode, signal converter amplifier circuit
Effect is: for sensor due to the limitation by factors such as volume, power consumption and transfer efficiencies, the signal of output is all fainter,
It is difficult to be used directly to show and record, therefore is provided with signal converter amplifier circuit, small voltage signal is amplified；Control
Device processed carries out Young's modulus calculating to measured value, is not in the artificial problem for calculating mistake, greatly reduces and the general of mistake occurs
Rate；The present invention passes through the voltage signal that polar distance formula capacitance sensor changes, and voltage signal passes through signal converter amplifier circuit
After the analog signal of conversion and amplification and A/D converter is converted into digital signal, controller is passed to, controller calculates
The dependent variable of steel wire to be measured, then controller combines the stress value applied, and the Young's modulus of the steel wire is calculated；Finally by
The digital signal of D/A converter is converted into analog signal, shows after drive module is handled in display；Therefore there is structure letter
It is single, it is easy to operate, calculated and measurement without artificial, it is only necessary to determine to the stress value that steel wire applies can be obtained by display by
Survey the Young's modulus of steel wire；Error caused by human eye reading is reduced, without telescope is adjusted, reduces the inconvenience of operation.
Detailed description of the invention
Fig. 1 is mounting arrangements schematic diagram of the invention；
Fig. 2 is system principle diagram of the invention.
Specific embodiment
The present invention will be further described below.
As shown, specific steps of the invention are as follows:
A, Young's modulus is first measured to steel wire using optical lever measuring device, record in test process the stress value that applies and
The dependent variable of steel wire；
B, by polar distance formula capacitance sensor on guide rail, then step A has been surveyed to one end and the polar distance formula of steel wire
The movable plate of capacitance sensor is fixedly connected, and the other end and hook for having surveyed steel wire connect, then polar distance formula capacitance sensor, letter
Number converter amplifier circuit, A/D converter, controller, D/A converter, drive module and display are sequentially connected by data line,
Controller receives the voltage signal of initial polar distance formula capacitance sensor by signal converter amplifier circuit and A/D converter, makees
Based on value stored；
C, counterweight is added on hook and applies the stress value recorded in step A to steel wire has been surveyed, and controller passes through letter at this time
Number converter amplifier circuit and A/D converter receive the real-time voltage signal of current polar distance formula capacitance sensor, and controller will be real
When voltage signal and the basic value of step B storage do difference, then calculate the ratio of dependent variable in the difference and step A, finally
Obtain the relationship between voltage variety and dependent variable；
D, the movable plate for having surveyed steel wire and polar distance formula capacitance sensor and hook are split, and makes the both ends point of steel wire to be measured
It is not connected with the movable plate of polar distance formula capacitance sensor and hook, counterweight is added on hook, stress is applied to steel wire to be measured, and
By the stress value input controller, while controller reads the real-time voltage signal of current polar distance formula capacitance sensor, control
The basic value of real-time voltage signal and step B storage is done difference by device processed, is obtained current voltage variety, is then transferred step
Dependent variable of the steel wire to be measured under current stress value is calculated in relationship between the voltage variety that C is obtained and dependent variable；Most
The Young of the steel wire to be measured is calculated according to Young's modulus formula by current stress value and current dependent variable for controller afterwards
Modulus；
E, after the Young's modulus that controller obtains step D is by D/A converter and drive module processing, it is sent to display
Device is shown.
Further, the polar distance formula capacitance sensor is differential type.For polar distance formula capacitance sensor, to improve
Sensitivity, can reduce initial spacing, but it is also contemplated that the limitation for the breakdown voltage that capacitor is born and increase the difficulty of assembly work
Degree, in addition, the non-linear of sensor will increase with the increase of relative displacement, to guarantee that the linearity should limit the position of movable plate
Shifting amplitude, it is non-linear in order to improve, sensitivity is improved, therefore use differential type.
Further, the controller is single-chip microcontroller.
Further, the display is liquid crystal display.
Above-mentioned polar distance formula capacitance sensor, signal converter amplifier circuit, A/D converter, controller, D/A converter,
Drive module and display are existing equipment, can be directly commercially available by market.
Claims (4)
1. a kind of method for surveying steel wire Young's modulus using polar distance formula capacitance sensor, which is characterized in that specific steps are as follows:
A, Young's modulus is first measured to steel wire using optical lever measuring device, records the stress value and steel wire applied in test process
Dependent variable；
B, by polar distance formula capacitance sensor on guide rail, then step A has been surveyed to one end and the polar distance formula capacitor of steel wire
The movable plate of sensor is fixedly connected, and the other end and hook for having surveyed steel wire connect, and then polar distance formula capacitance sensor, signal turn
It changes amplifying circuit, A/D converter, controller, D/A converter, drive module and display to be sequentially connected by data line, control
Device receives the voltage signal of initial polar distance formula capacitance sensor by signal converter amplifier circuit and A/D converter, as base
Plinth value is stored；
C, counterweight is added on hook and applies the stress value recorded in step A to steel wire has been surveyed, and controller is turned by signal at this time
It changes amplifying circuit and A/D converter receives the real-time voltage signal of current polar distance formula capacitance sensor, controller will be electric in real time
Pressure signal and the basic value of step B storage do difference, then calculate the ratio of dependent variable in the difference and step A, finally obtain
Relationship between voltage variety and dependent variable；
D, the movable plate and hook that will have surveyed steel wire and polar distance formula capacitance sensor are split, and make the both ends of steel wire to be measured respectively with
The movable plate of polar distance formula capacitance sensor and hook connection, counterweight is added on hook and applies stress to steel wire to be measured, and should
Stress value input controller, while controller reads the real-time voltage signal of current polar distance formula capacitance sensor, controller
The basic value of real-time voltage signal and step B storage is done into difference, current voltage variety is obtained, then transfers step C and obtain
Relationship between voltage variety out and dependent variable, is calculated dependent variable of the steel wire to be measured under current stress value；Finally
The Young mould of the steel wire to be measured is calculated according to Young's modulus formula by current stress value and current dependent variable for controller
Amount；
E, the Young's modulus that controller obtains step D by D/A converter and drive module processing after, be sent to display into
Row display.
2. a kind of method for surveying steel wire Young's modulus using polar distance formula capacitance sensor according to claim 1, special
Sign is that the polar distance formula capacitance sensor is differential type.
3. a kind of method for surveying steel wire Young's modulus using polar distance formula capacitance sensor according to claim 1, special
Sign is that the controller is single-chip microcontroller.
4. a kind of method for surveying steel wire Young's modulus using polar distance formula capacitance sensor according to claim 1, special
Sign is that the display is liquid crystal display.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910062620.0A CN109813608A (en) | 2019-01-23 | 2019-01-23 | A method of steel wire Young's modulus is surveyed using polar distance formula capacitance sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910062620.0A CN109813608A (en) | 2019-01-23 | 2019-01-23 | A method of steel wire Young's modulus is surveyed using polar distance formula capacitance sensor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1704748A (en) * | 2004-06-03 | 2005-12-07 | 电子科技大学 | Electrostatic capacitance type apparatus for measuring Young's modulus |
| CN201072394Y (en) * | 2007-06-05 | 2008-06-11 | 付东 | Young's modulus automatic measuring instrument |
| CN201607372U (en) * | 2010-02-23 | 2010-10-13 | 昆明理工大学 | Novel high-precision metal wire young modulus measuring device |
| JP2011033614A (en) * | 2009-07-08 | 2011-02-17 | Shinshu Univ | Method for using tuning fork type crystal tactile sensor |
| CN104931343A (en) * | 2015-06-23 | 2015-09-23 | 苏州市英富美欣科技有限公司 | Metal Young-modulus measuring system based on photoelectric sensor |
| CN206876502U (en) * | 2017-06-02 | 2018-01-12 | 赵亚明 | A kind of modulus measurer |
-
2019
- 2019-01-23 CN CN201910062620.0A patent/CN109813608A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1704748A (en) * | 2004-06-03 | 2005-12-07 | 电子科技大学 | Electrostatic capacitance type apparatus for measuring Young's modulus |
| CN201072394Y (en) * | 2007-06-05 | 2008-06-11 | 付东 | Young's modulus automatic measuring instrument |
| JP2011033614A (en) * | 2009-07-08 | 2011-02-17 | Shinshu Univ | Method for using tuning fork type crystal tactile sensor |
| CN201607372U (en) * | 2010-02-23 | 2010-10-13 | 昆明理工大学 | Novel high-precision metal wire young modulus measuring device |
| CN104931343A (en) * | 2015-06-23 | 2015-09-23 | 苏州市英富美欣科技有限公司 | Metal Young-modulus measuring system based on photoelectric sensor |
| CN206876502U (en) * | 2017-06-02 | 2018-01-12 | 赵亚明 | A kind of modulus measurer |
Non-Patent Citations (3)
| Title |
|---|
| E.D. NICHOLSON ET.AL: "Young’s modulus of diamond-coated fibres and wires", 《DIAMOND AND RELATED MATERIALS》 * |
| 方兴: "杨氏模量实验的改进", 《大学物理实验》 * |
| 毛勇: "电容传感器法测量钢丝的杨氏模量的应用研究", 《湘潭师范学院学报( 自然科学版)》 * |
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