CN101968389A - Elasticity and displacement amount measuring device and method, application thereof - Google Patents
Elasticity and displacement amount measuring device and method, application thereof Download PDFInfo
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- CN101968389A CN101968389A CN2009101511592A CN200910151159A CN101968389A CN 101968389 A CN101968389 A CN 101968389A CN 2009101511592 A CN2009101511592 A CN 2009101511592A CN 200910151159 A CN200910151159 A CN 200910151159A CN 101968389 A CN101968389 A CN 101968389A
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Abstract
The invention discloses elasticity and displacement amount measuring device and method application thereof. The elasticity and displacement amount measuring device is characterized in that a displacement sensing module and a force sensing module are arranged on both ends of a shaft lever; a baffle-board of the displacement sensing module can displace with the shaft lever in the process that the shaft lever is moved and a probe of the force sensing module presses a measured key, and an optical sensor measures a displacement amount; after the probe of the force sensing module presses the measured key, a sensing sheet can be deformed, and the size of elasticity is measured by a strain gauge, therefore the elasticity and the displacement amount can be synchronously measured by the force sensing module and the displacement sensing module. Besides, when the displacement amount measuring method is in use, a measure stroke is divided into a plurality of measuring ranges, and each measuring range corresponds to an arithmetic model to accurately calculate the distance values of measured distance data.
Description
Technical field
The technical field that the present invention measures relevant for a kind of button, particularly about a kind of can synchronous measure elastic force and measuring equipment, purposes and the method for displacement.
Background technology
Button is applied on the electronic goods very extensive, as: computer keyboard, mobile phone, phone or the like.And in order to allow the user can more cosily manipulate button, manufacturer advises the suitable button elastic force pattern of receiving out through experiment test for years, so that its product is measured when making button, and this kind is used to measure the measurement facility of button elastic force, also arises at the historic moment.
If the novel patent announcement of TaiWan, China No. 529714 " button elastic force measuring machine " promptly is an example, it is by motor driven one lifter plate lifting, and on this lifter plate, assemble the measurement instrument in conjunction with a buffing pad, and by the reference test bar that measures instrument compress that button measures that button is pressed down and upward stroke in elastic force, and control the rotating speed of motor by being arranged on some microswitches on the buffing pad, make metrology operation more accurate and rapider, and make metrology operation more stable, and avoid manual operation to lose improperly by mistake.
Button elastic force measurement technology disclosed in the aforementioned patent, be applied in straight line descend with the keyboard that rises on perhaps enough.But for the button on the wind instrument (as: Saxphone etc.), because the button of these musical instruments is foldings of controlling sound hole lid and sound hole with the arc to-and-fro movement that a pivot does to pivot.Therefore for the keys of musical instrument of this class not only requirement survey its elastic force, also must can measure the relation of button displacement (stroke) and elastic force, just can meet required, thereby technology disclosed in the aforementioned patent is applied use, and in addition improved necessity is arranged again.
And about the measurement technology of displacement in U.S. US6839957 number " Displacement Unit " patent, a kind of unit that measures displacement of controlling with hydraulic technology is promptly disclosed.Examine this patent content closely and find, it uses the oil pressure control mode to drive the sliding apparatus displacement, uses measuring its displacement.Therefore and be not suitable for migrating to the measurement system of wind instrument button but the disclosed unit volume of this patent is big and can't measure the size of elastic force.
Moreover, button on the wind instrument (as: Saxphone etc.) is the periphery that is distributed in the wind instrument of tubular, therefore different key can be distributed in different angles, technology disclosed in the aforementioned patent can only measure in the direction displacement perpendicular to the measuring machine worktable, this is obviously also inapplicable for the set button of different angles on the musical instrument.
Therefore, be to cooperate a scale to measure instrument (or using large-scale servo motor) at present with the stretching power table that declines to the metrology operation of the button on the wind instrument, reach the purpose that measures elastic force and displacement, but still there is the big and expensive problem of volume in such measurement mode.
Other has the technology that measures displacement with Laser Distance Measuring Equipment, but Laser Distance Measuring Equipment cost is set, have expensive problem equally.
Summary of the invention
The technical problem underlying that the present invention solves is, a kind of small-sized portable is provided and can measures measuring equipment, purposes and the method for force variation and displacement simultaneously.
For reaching aforementioned purpose, the invention discloses a kind of elastic force and displacement measuring equipment, a displacement sensing module and a power sensing module are arranged at the two ends of the axostylus axostyle that can be moved back and forth.This displacement sensing module has an optical sensor and a reflecting plate, and one of them is arranged at this optical sensor and this reflecting plate on this axostylus axostyle, and another corresponding this board that is arranged at wherein is in order to measure the displacement of this axostylus axostyle; And this power sensing module is provided with a sensing thin slice, and the one side of sensing thin slice is provided with a probe, and another side then is provided with a strainometer, when making this sensing thin slice distortion to compress tested button in this probe, is recorded the size of elastic force by this strainometer.
In view of the above, when this axostylus axostyle is driven displacement and is compressed tested button by this probe, can be by this power sensing module and this displacement sensing module synchronous measure elastic force and displacement, and then calculate its resiliency characteristics, and reach the portable effectiveness of miniaturization.
According to above-mentioned purpose, the present invention also provides a kind of method for measurement of displacement, measure displacement with an infrared ray sensor and a reflecting plate, it mainly is that the measurement stroke is divided into several sections measuring ranges, each section measuring range is all to there being an operational model, and the relative displacement range data of this reflecting plate of infrared ray sensor measurement gained is analyzed, find range from the measuring range that is fallen into decision content, and select corresponding operational model, range data value with sampling calculates distance value according to selected operational model again, obtaining accurate displacement measurement, and can reduce the cost of setting.
The aforesaid characteristics of the present invention, characteristic will obtain to understand in depth from the detailed description and accompanying drawing of following embodiment.
Description of drawings
Fig. 1 is the synoptic diagram of measuring equipment of the present invention;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is the structural representation of displacement sensing module of the present invention;
Fig. 4 is the structural representation of power sensing module of the present invention;
Fig. 5 is the synoptic diagram of operation processing unit of the present invention; And
Fig. 6 is the schematic flow sheet of method for measurement of the present invention.
Wherein, Reference numeral:
Board 1 pedestal 10
Support 15 locking members 151
Framework 152 axostylus axostyles 16
Trace 17 baffle plates 18
Sensing thin slice 32 probes 33
Embodiment
Existing conjunction with figs. is described in detail as follows embodiments of the invention.
Please also refer to Fig. 1 to Fig. 6.Fig. 1 is the synoptic diagram of measuring equipment of the present invention; Fig. 2 is a structural representation of the present invention; Fig. 3 is the structural representation of displacement sensing module of the present invention; Fig. 4 is the structural representation of power sensing module of the present invention; Fig. 5 is the synoptic diagram of operation processing unit of the present invention; Fig. 6 is the schematic flow sheet of method for measurement of the present invention.
At first see also Fig. 1, elastic force of the present invention and displacement measuring equipment mainly carry out measurement work to button synchronously by a displacement sensing module 2 and a power sensing module 3, the information that will measure gained again is sent to an operation processing unit 4 and carries out calculation process, last again by operation processing unit 4 with the information transmission after the calculation process to computing machine 5 and display 6 display result.
Please refer to Fig. 2, displacement sensing module 2 of the present invention and power sensing module 3 are set on the board 1, and are the form of coaxial setting.This board 1 has a pedestal 10, this pedestal 10 is provided with a pin joint seat 11, being pivoted with one on this pin joint seat 11 can be according to the slide rail 12 of required adjustment angle, this slide rail 12 is provided with a power source 13 (as: step motor) and a slide block 14 that is driven by this power source 13, and this slide block 14 can be moved back and forth along this slide rail 12.This slide rail 12, power source 13 and slide block 14 can adopt linear slide rail to realize on the practice.
These slide rail 12 outer rims are slidingly equipped with a support 15, on this support 15 to being provided with several locking members 151 by slide rail 12, use this support 15 is locked in this slide rail 12, or when loosening, make this support 15 adjust the position along this slide rail 12, and this support 15 is provided with a framework 152 with respect to a side of this slide rail 12, this framework 152 is roughly parallel with this slide rail 12, and be slidingly equipped with an axostylus axostyle 16 in the framework 152, link between this axostylus axostyle 16 and this slide block 14 and with a trace 17, make this axostylus axostyle 16 can with these slide block 14 same moved further, and these axostylus axostyle 16 stage casings are provided with a baffle plate 18, and this axostylus axostyle 16 is arranged with a spring 19 between this baffle plate 18 and this support 15 bottoms, make under these axostylus axostyle 16 normalities by the elastic force of this spring 19 to remain in a fixed position, in present embodiment, this axostylus axostyle 16 is remained in the position of a top.
See also Fig. 3, this displacement sensing module 2 has an optical sensor and a reflecting plate 22; This optical sensor is an infrared ray sensor 21 in this enforcement, and this reflecting plate 22 is arranged at the end face of this axostylus axostyle 16, this infrared ray sensor 21 is then to should reflecting plate 22 and be arranged at the top of this support 15, and this infrared ray sensor 21 is electrically connected to this operation processing unit 4, can move and during the displacement that comes this reflecting plate 22 of sensing to move via ultrared emission, reflection and reception by this in this reflecting plate 22 along with axostylus axostyle 16 with these infrared ray sensor 21 relative displacements with this axostylus axostyle 16.
See also Fig. 4, this power sensing module 3 is arranged at the bottom of this axostylus axostyle 16, it has a framework 31, this framework 31 is fixed in the bottom of this axostylus axostyle, be provided with a sensing thin slice 32 in this framework 31, be provided with a probe 33 that extends downwards in the bottom surface of this sensing thin slice 32, and be provided with a strainometer 34 in the end face of this sensing thin slice 32,34 of this strainometers are electrically connected to this operation processing unit 4, can pop one's head in this by this and 33 compress button when making 32 distortion of this sensing thin slice, record the size of elastic force by this strainometer 34.The measuring range of this power sensing module 3 is designed between 0～1000g in present embodiment, and the specification of this sensing thin slice 32 square brass material thin slice that is 30mm * 30mm, the 33 5mm glass that then service property (quality) is light, rigidity is stronger of popping one's head in are from the fiber cylinder.
See also Fig. 5, this operation processing unit 4 is made up of a processor 41, an internal memory 42, a Keysheet module 43, a communication module 44 and a power module 45.This processor 41 is handled the data that transmitted by this displacement sensing module 2 and this power sensing module 3 for receiving union; This internal memory 42 is for the elastic force that stores the measurement gained and the data of displacement; This Keysheet module 43 is imported message and is controlled this operation processing unit 4 for the user; This communication module 44 is for linking with external device; Be that communication module 44 is connected to computing machine 5 for example with the RS232 communication port; This power module 45 then supplies this operation processing unit 4 required electric power.
And the measurement technology of aforementioned relevant displacement, reduce the purpose that cost is set in order to reach, the present invention adopts the infrared ray sensing component to measure displacement, but responding and nonlinearities change of infrared ray sensing component apart from the photoelectricity sensing, if want the degree of accuracy of maintenance dose measured value, then need method for measurement again to improve.
Therefore, the present invention discloses a kind of method for measurement of displacement in addition, and further, it is a kind of method with infrared ray sensing component measurement displacement, comprises the following steps:
One, range data reads
Read the data that this infrared ray sensor 21 measures these reflecting plate 22 relative displacement distances of gained.
If will allow measurement more accurate, can take 10 mean values of the range data that measures gained, make measurement more accurate.
Two, apart from comparative analysis
Analyze the measurement range data that previous step read, drop on which range finding from scope to judge this measurement distance, and select corresponding operational model.
Because responding and nonlinearities change of infrared ray sensing component apart from the photoelectricity sensing, the equivalent range finding is when becoming big, measurement signal can be too small, the relative variation of resolution, and need faint measurement signal is additionally done processing and amplifying, therefore, the full distance measurement need be designed to calculate according to the section segmentation, design different amplifying circuits again and handle, just can guarantee to measure degree of accuracy.
Button with the measurement Saxphone is an example, the required measurement stroke (i.e. the stroke of these slide block 14 interlock axostylus axostyles 16 displacements) of this elastic force and displacement measuring equipment is not more than 40mm, the inventor is through constantly research test, discovery should measure stroke divide into three section: 0～d1 (0～15mm), d1～d2 (15～30mm) with d2～d3 (30～40mm) three sections are better model, but not as limit.
When carrying out apart from comparative analysis, with the range data that measures gained in the previous step relatively its whether greater than d2, if greater than d2 then select for use operational model 3 to carry out computing; If not, then again this range data whether greater than d1, if then select operational model d2 for use; If not, then select for use operational model 1 to carry out computing.
Three, distance calculation
The range data value of sampling is inserted in the analysis formula according to selected operational model, to calculate distance value.
For example: equivalent is found range when being 12mm, and the numerical value of 12mm drops on section d1 and (in 0～15mm), therefore selects for use operational model 1 to carry out computing; And equivalent is found range when being 22mm, and the numerical value of 22mm drops on section d2 (in 15～30mm), so select for use operational model 2 to carry out computing.
The operational formula of each operational model that the inventor worked out is as follows, and wherein y is a distance value; X is the digit value that measures (being 8 measured bit digital value of aforesaid displacement sensing module 2).
The operational formula of operational model 1:
The operational formula of operational model 2:
The operational formula of operational model 3:
y＝94.54813-0.43117x+0.000695706x
2
After the measurement and calculating via aforementioned each step, can obtain an accurate displacement measuring value.
When using elastic force of the present invention and displacement measuring equipment, earlier object to be measured (as: Saxphone) is placed on the pedestal 10, adjust the angle of this pin joint seat 11 and slide rail 12 then, make the angle of axostylus axostyle 16 and the subvertical state of pivotal orientation of to be measured button, adjust the position of this support 15 again, the probe 33 of the power sensing module 3 that axostylus axostyle 16 front ends are protruded is aimed at and pressed close to button.
Then promptly start power source 13 drive slide blocks 14 on slide rail 12 to bottom offset, and it is downward to drive axostylus axostyle 16 synchronously by trace 17, and the probe 33 that is protruded by axostylus axostyle 16 front ends presses down button, again after button is pressed against the end, oppositely drive slide block 14 interlock axostylus axostyles 16 by power source 13 and rise, to pop one's head in 33 leave button till.
And in the process of elastic force of the present invention and the action of displacement measuring equipment, when axostylus axostyle 16 is driven to bottom offset and to pop one's head in 33 when pressing down button, this displacement sensing module 2 just can be carried out the measurement of displacement and elastic force simultaneously with this power sensing module 3, and the data that will measure gained are sent to operation processing unit 4 and carry out calculation process, then the information of computing gained is sent to display 6 and shows, and simultaneously information is transferred to computing machine 5 via communication module 44 and store.
Though the present invention with aforesaid some embodiment openly as above; but it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; do to change and revise and equivalence is replaced, still be in the scope of patent protection of the present invention.
Claims (14)
1. elastic force and displacement measuring equipment is characterized in that, include:
One axostylus axostyle reciprocatingly is placed in a board;
One displacement sensing module, it has an optical sensor and a reflecting plate, and one of them of this optical sensor and this reflecting plate is arranged on this axostylus axostyle, and another corresponding this board that is arranged at wherein is in order to measure the displacement of this axostylus axostyle; And
One power sensing module, be arranged at the end of this axostylus axostyle with respect to this displacement sensing module, this power sensing module is provided with a sensing thin slice, the one side of this sensing thin slice is provided with a probe, another side then is provided with a strainometer, compress tested button and when making the distortion of this sensing thin slice, record the size of elastic force by this strainometer in this probe;
By this, when this axostylus axostyle moves and compresses tested button by this probe, by this power sensing module and this displacement sensing module synchronous measure elastic force and displacement.
2. elastic force according to claim 1 and displacement measuring equipment is characterized in that this reflecting plate is arranged at the end face of this axostylus axostyle, and this optical sensor is to being arranged on the board by reflecting plate.
3. elastic force according to claim 1 and displacement measuring equipment is characterized in that, this power sensing module has a framework, and this frame fixation is in the bottom of this axostylus axostyle, and this sensing thin slice is arranged in this framework.
4. elastic force according to claim 1 and displacement measuring equipment is characterized in that, this optical sensor is an infrared ray sensor.
5. elastic force according to claim 1 and displacement measuring equipment, it is characterized in that, this board has a pedestal, this pedestal is provided with a slide rail, this slide rail be provided with a power source with by a slide block that this power source drove, this slide block is moved back and forth along this slide rail, one side of this slide rail is extended with a support, this support is established for aforesaid axostylus axostyle cunning, link with a trace between this axostylus axostyle and this slide block, make this axostylus axostyle and the same moved further of this slide block, this axostylus axostyle stage casing is provided with a baffle plate, and this axostylus axostyle is arranged with a spring between this baffle plate and this frame bottom, makes by the elastic force of this spring to remain in a fixed position under this axostylus axostyle normality.
6. elastic force according to claim 5 and displacement measuring equipment is characterized in that this pedestal is provided with a pin joint seat, and this pin joint seat and this slide rail articulate and link, to adjust the angle of this slide rail.
7. elastic force according to claim 5 and displacement measuring equipment is characterized in that, this power source is a step motor.
8. elastic force according to claim 5 and displacement measuring equipment, it is characterized in that, this support is slidedly arranged on this slide rail outer rim, this support is to being provided with several locking members by slide rail, so that this support is locked in this slide rail, and this support is provided with a framework with respect to a side of this slide rail, and this framework is established for this axostylus axostyle cunning.
9. elastic force according to claim 1 and displacement measuring equipment, it is characterized in that, further comprise an operation processing unit, this operation processing unit is made up of a processor, an internal memory, a Keysheet module, a communication module and a power module, and this processor is handled the data that transmitted by this displacement sensing module and this power sensing module for receiving union; This internal memory is for the elastic force that stores the measurement gained and the data of displacement; This Keysheet module is imported message and is controlled this operation processing unit for the user; This communication module is for linking with external device; This power module supplies this operation processing unit required electric power.
10. elastic force according to claim 9 and displacement measuring equipment is characterized in that, this communication module is the RS232 communication port, to be connected to computing machine.
11. the method for measurement of a displacement measures displacement with an infrared ray sensor and a reflecting plate, it is characterized in that, comprises the following step:
Read the relative displacement range data that this infrared ray sensor measures this reflecting plate of gained;
To measure stroke and divide into several sections measuring ranges, each measuring range all to an operational model should be arranged, is analyzed the measurement range data that previous step read, and with the measuring range of judging that this measurement distance is fallen into, selects corresponding operational model; And
The range data value of sampling is come to calculate distance value according to selected operational model.
12. the method for measurement of displacement according to claim 11 is characterized in that, this measurement stroke is divided into d1, d2 and three sections of d3, when the distance that measures drops in the d1 scope, selects for use operational model 1 to do processing and amplifying; When the distance that measures drops in the d2 scope, select for use operational model 2 to do processing and amplifying; When the distance that measures drops in the d3 scope, select for use operational model 3 to do processing and amplifying.
13. the method for measurement of displacement according to claim 12 is characterized in that, this measurement stroke is for being not more than 40mm, and this section d1 is between 0～15mm; This section d2 is between 15～30mm; This section d3 is between 30～40mm, and the operational formula of this operational model 1 is:
The operational formula of this operational model 2 is:
The operational formula of operational model 3 is:
y＝94.54813-0.43117x+0.000695706x
2
Wherein, y is a distance value; X is the measured data value of aforesaid infrared ray sensor.
14. the purposes of elastic force as claimed in claim 1 and displacement measuring equipment is characterized in that, in order to the elastic force and the displacement of the button that measures wind instrument, described wind instrument comprises Saxphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101511592A CN101968389B (en) | 2009-07-27 | 2009-07-27 | Elasticity and displacement amount measuring device and method, application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101511592A CN101968389B (en) | 2009-07-27 | 2009-07-27 | Elasticity and displacement amount measuring device and method, application thereof |
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| CN101968389A true CN101968389A (en) | 2011-02-09 |
| CN101968389B CN101968389B (en) | 2012-07-11 |
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