[go: up one dir, main page]

WO2019205331A1 - 一种书写工具摩擦力测试装置及其测试方法 - Google Patents

一种书写工具摩擦力测试装置及其测试方法 Download PDF

Info

Publication number
WO2019205331A1
WO2019205331A1 PCT/CN2018/097904 CN2018097904W WO2019205331A1 WO 2019205331 A1 WO2019205331 A1 WO 2019205331A1 CN 2018097904 W CN2018097904 W CN 2018097904W WO 2019205331 A1 WO2019205331 A1 WO 2019205331A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper
writing instrument
writing
sleeve
strain gauge
Prior art date
Application number
PCT/CN2018/097904
Other languages
English (en)
French (fr)
Inventor
汪朋飞
罗晓毅
刁东风
Original Assignee
深圳大学
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 深圳大学 filed Critical 深圳大学
Publication of WO2019205331A1 publication Critical patent/WO2019205331A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/02—Measuring coefficient of friction between materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means

Definitions

  • the invention relates to the technical field of friction testing devices, and in particular to a writing tool friction testing device and a testing method thereof.
  • the writing instrument When writing, the writing instrument comes into contact with the paper surface and generates friction. The amount of friction at the tip of the writing instrument is closely related to the writing sensation of the writer.
  • the technical problem to be solved by the present invention is to provide a writing tool friction testing device and a testing method thereof for testing the above-mentioned defects of the prior art, and aiming at testing the friction coefficient of a writing instrument when writing on a paper to determine the writing instrument Writing feel.
  • a writing tool friction testing device includes a base and a writing tool, wherein the base is provided with a displacement adjusting device, a paper carrying platform, a driving device, a data collecting device and a computer, and the displacement adjusting device is arranged a cantilever beam is disposed on the cantilever beam, the top of the front end of the cantilever beam is provided with a load adjusting device, a bottom of the front end of the cantilever beam is provided with a clamping device, and the paper carrying platform is provided with paper, and a paper pretensioning device coupled to the paper and pulling the paper, the clamping device for clamping the writing tool and tilting the writing tool at a predetermined writing angle with respect to the paper,
  • the driving device is coupled to the paper carrying platform and drives the paper carrying platform to reciprocate, the driving device is further connected to the computer, and the strain gauge assembly, the data collecting device and the computer are sequentially connected.
  • the writing tool friction testing device wherein the clamping device comprises: a sleeve, a connecting post, and a plurality of limiting members; the upper end and the lower end of the sleeve are open; the connecting post is fixedly disposed at the The outer surface of the sleeve is perpendicularly connected to the cantilever beam; the sleeve is provided with a plurality of threaded through holes, and the limiting member is provided with an external thread, and the external thread is opposite to the threaded through hole Cooperating to place one end of the stop member within the sleeve.
  • the writing instrument friction testing device wherein the writing instrument is a refill, the refill passes through the sleeve, and the limiting member holds the refill.
  • the writing instrument friction testing device wherein the writing instrument is a pen nib, a mounting member is disposed in a lower end opening of the sleeve, and one end of the mounting member is disposed outside the sleeve and is opposite to the pen A nib is attached, the mounting member is for transferring ink injected from an upper end opening of the sleeve to the pen nib, and the limiting member holds the mounting member.
  • the writing instrument friction testing device wherein the paper carrying platform comprises: a moving table, a bottom plate disposed on an upper surface of the moving table, a storage table disposed on an upper surface of the bottom plate, and a storage table disposed at the stage a first paper platen connected to the stage; the paper is located between the stage and the first paper platen and reciprocally slidable; the first paper platen is provided for exposing the paper A number of shorts.
  • the writing instrument friction testing device wherein the paper pretensioning device comprises a first paper winding mechanism and a second paper winding mechanism symmetrically disposed on both sides of the bottom plate, the two ends of the paper respectively and the first A roll paper mechanism and the second paper roll mechanism are connected, and the first paper roll mechanism and the second paper roll mechanism roll the two ends of the paper away from the bottom plate.
  • the writing instrument friction testing device wherein the first winding mechanism comprises: a bracket, symmetrically disposed first and second rings, a hollow column, a rotating shaft, and a paper roll; one end of the hollow column Inserting into the first ring and having an opening at the other end and facing the second ring; the first end of the rotating shaft is inserted into the hollow column from the opening and can slide back and forth along the hollow column, a second end of the rotating shaft passes through the second ring; a first end of the rotating shaft is connected to the hollow column by an elastic member, and a deformation direction of the elastic member is parallel to a sliding direction of the rotating shaft; a plurality of tooth grooves are disposed on the inner wall of the second ring, and the outer wall of the rotating shaft is provided with a plurality of tooth tips that mesh with the tooth grooves; the paper roll sleeve is sleeved on the hollow column; A card slot that engages with the tooth tip is disposed on the inner wall of the paper tube.
  • the writing instrument friction testing device wherein the strain gauge assembly includes a first strain gauge, a second strain gauge symmetrically disposed on an upper surface and a lower surface of the cantilever beam; the first strain gauge and the second strain
  • the sheet is used to measure load information of the paper according to a deformation amount of the cantilever beam when the displacement adjusting device adjusts a height of the cantilever beam to adjust a load generated by the writing instrument on the paper.
  • the writing instrument friction testing device wherein the data collecting device comprises a bridge box, a signal amplifier and a data acquisition card connected in sequence; the bridge box is connected with the strain gauge assembly; the data acquisition card and The computer is connected.
  • a test method based on a writing tool friction test device comprising the steps of:
  • the computer calculates the friction coefficient.
  • the present invention mounts the writing instrument by the clamping device, and positions the writing tool to tilt the writing tool at a predetermined writing angle with respect to the paper, thereby simulating a human hand holding the writing
  • the state of the tool when it is written on the paper, the frictional coefficient is obtained by collecting the load and friction between the writing instrument and the paper to determine the writing hand of the writing instrument.
  • FIG. 1 is a schematic structural view of a friction test device for a writing instrument according to the present invention
  • FIG. 2 is a reference view of a state of use when the displacement adjusting device of the present invention is assembled with the clamping device;
  • FIG. 3 is an assembled view of the writing instrument and the clamping device when the writing instrument is a refill according to a preferred embodiment 1 of the present invention
  • FIG. 4 is a schematic exploded view of the clamping device when the writing instrument is a pen tip of a preferred embodiment 2 of the present invention
  • Figure 5 is a view showing a state of use of the driving device in the present invention when assembled with the paper carrying platform;
  • Figure 6 is a schematic view showing the structure of the first paper winding mechanism in the present invention.
  • Figure 7 is a reference view of the state of use of the hollow column and the bracket when assembled in the present invention.
  • Figure 8 is a schematic structural view of the rotating shaft in the present invention.
  • Figure 9 is a reference view of the use state of the rotating shaft, the hollow column and the bracket when the bracket is assembled in the present invention.
  • Fig. 10 is a view showing a state of use of the tooth tip in engagement with the tooth groove in the present invention.
  • the invention provides a writing tool friction testing device, as shown in FIG. 1 and FIG. 5, which comprises a base 1 and a writing instrument 2, wherein the base 1 is provided with a displacement adjusting device 3, a paper carrying platform 4, and a driving device.
  • the paper carrying platform 4 is provided with a paper 200, and a paper pretensioning device 10 connected to the paper 200 and pulling the paper 200.
  • the clamping device 9 is used for clamping and positioning the writing instrument 2.
  • the writing tool 2 is inclined with respect to the paper 200 at a predetermined writing angle
  • the driving device 5 is connected with the paper carrying platform 4 and drives the paper carrying platform 4 to reciprocate, and the driving device 5 further Connected to the computer 100, the strain gauge assembly 8, the data collection device 6, and the computer 100 are sequentially connected.
  • the clamping device 9 is connected to the displacement adjusting device 3 via the cantilever beam 7, and the displacement adjusting device 3 adjusts the position of the clamping device 9 by adjusting the displacement of the cantilever beam 7, when After the writing tool 2 is fitted with the clamping device 9, the writing instrument 2 can be adjusted to the top of the paper carrying platform 4 and placed on the paper carrying platform 4 by the displacement adjusting device 3.
  • the paper 200 is in contact; and the distance of the downward movement of the cantilever beam 7 is further adjusted by the displacement adjusting device 3 to adjust the load pressure of the writing instrument 2 on the paper 200, so that the writing instrument 2 and the paper 200 are In close contact; the driving device 5 is activated, the driving device 5 drives the paper 200 to reciprocate, and the writing instrument 2 remains stationary, thereby simulating the writing state.
  • the clamping device 9 of the present invention is further configured to position the writing instrument 2 such that the writing instrument 2 is inclined with respect to the paper 200 at a predetermined writing angle, thereby simulating a human hand holding the writing The state of the tool 2 when it is written on the paper 200.
  • the data acquisition device 6 is connected to the strain gauge assembly 8 for acquiring the friction generated between the writing instrument 2 and the writing tool 2 when the paper 200 is reciprocated by the strain gauge assembly 8 .
  • the data collecting device 6 transmits friction data and load data to the computer 100, and calculates a corresponding friction coefficient by the computer 100, thereby determining The writing feel of the writing instrument 2 provides a basis for determination.
  • the displacement adjusting device 3 includes a three-axis stage 31 and an adapter frame 32.
  • the adapter frame 32 is fixedly disposed on the three-axis stage 31 and is used to mount the cantilever beam 7. .
  • the three-axis stage 31 can perform adjustment of the X-axis (front-rear direction), the Y-axis (left-right direction), and the Z-axis (up-and-down direction) to adjust the writing instrument 2 directly above the sheet 200 and contact the sheet 200.
  • the front, rear, left, right, up and down directions are as shown in Fig. 1.
  • the clamping device 9 includes a sleeve 91, a connecting post 92, and a plurality of limiting members 93; the upper end and the lower end of the sleeve 91 are open; the connecting post 92 Fixedly disposed on an outer surface of the sleeve 91 and perpendicularly connected to the cantilever beam 7; the sleeve 91 is provided with a plurality of threaded through holes, and the limiting member 93 is provided with an external thread, the outer portion a thread is engaged with the threaded through hole to place one end of the limiting member 93 in the sleeve 91; an angle between the connecting post 92 and the sleeve 91 is equal to the preset writing angle.
  • the writing instrument 2 is a refill (such as a writing instrument 2 with a pen such as a pen refill, a ballpoint pen refill, etc.) or a pen tip (there is no ink provided, and the outside is required to supply ink).
  • the writing instrument 2 is a refill
  • the connecting post 92 is used to connect the sleeve 91 with the cantilever beam 7 while the sleeve 91 is Positioned in an inclined state such that the sleeve 91 is inclined with respect to the paper 200 by the predetermined writing angle;
  • the sleeve 91 is for mounting the refill, and the limiting member 93 is for the refill Limited within the sleeve 91.
  • the preset writing angle is an acute angle.
  • the predetermined writing angle is greater than 30° and less than 90°.
  • the upper end and the lower end of the sleeve 91 each have an opening, and the pen core penetrates from the upper end opening of the sleeve 91 into the sleeve 91 and passes through the lower end opening of the sleeve 91 to make the pen a tip end of the core is exposed outside the sleeve 91 for contact with the sheet 200; the stopper 93 is screwed into the threaded through hole by the engagement of the external thread with the threaded through hole, and the One end of the limiting member 93 is inserted into the sleeve 91 to contact the refill, and the stopper 93 is opposite to the refill as the depth of the limiting member 93 is screwed into the threaded through hole. The top holding force is increased to position the refill within the sleeve 91.
  • the connecting post 92 is provided with a first measuring disc 94, and the first measuring disc 94 has a central hole and is sleeved on the connecting post 92, the first degree The measuring disc 94 is perpendicular to the connecting post 92.
  • the front end of the front end of the cantilever beam 7 is provided with a mounting hole.
  • the first degree The upper surface of the dial 94 is in contact with the lower surface of the cantilever beam 7 to ensure that the connecting post 92 is completely perpendicular to the cantilever beam 7, thereby ensuring that the angle of inclination of the refill relative to the sheet 200 is equal to the Set the writing angle. That is, the first metric disk 94 is used to measure whether the refill is tilted relative to the paper 200 by the predetermined writing angle.
  • the writing instrument 2 is a pen nib
  • the upper end and the lower end of the sleeve 91 are open
  • the lower end opening of the sleeve 91 is provided with a mounting member 95.
  • One end of the mounting member 95 is disposed outside the sleeve 91 and connected to the pen tip of the pen, and the mounting member 95 is for transferring ink injected from the upper end opening of the sleeve 91 to the pen nib.
  • the limiting member 93 holds the mounting member 95.
  • the mounting member 95 is reciprocally slidable relative to the sleeve 91; the limiting member 93 is for restraining the mounting member 95 within the sleeve 91.
  • a second measuring disc 96 is disposed on the connecting post 92.
  • the second measuring disc 96 has a central hole and is sleeved on the connecting post 92.
  • the second measuring disc 96 is perpendicular to the connecting post 92.
  • the front end of the cantilever beam 7 is provided with a mounting hole.
  • the second metric disk 96 is used to measure whether the pen nib is tilted relative to the paper 200 by the predetermined writing angle.
  • the preset writing angle is an acute angle.
  • the predetermined writing angle is greater than 30° and less than 90°.
  • the pen tip is adhered to the mounting member 95 by glue, or a card slot is disposed on the pen tip of the pen, and a buckle is disposed on the mounting member 95, and the card is connected to the card slot by the snap connection
  • a pen tip is mounted on the mounting member 95.
  • the mounting member 95 is inserted into the sleeve 91 from the lower end opening of the sleeve 91 and is reciprocally slidable along the sleeve 91; the limiting member 93 is inserted into the threaded through hole and screwed.
  • One end of the limiting member 93 is inserted into the sleeve 91 and is in contact with the mounting member 95. With the depth of the limiting member 93 in the threaded through hole, the limiting member 93 is opposite.
  • the seating force of the mounting member 95 is increased to limit the mounting member 95 within the sleeve 91.
  • An ink is dropped from the upper end opening of the sleeve 91 into the sleeve 91, and ink is delivered to the pen nib through the mounting member 95 so that the pen nib can be opened after the driving device 5 is turned on. Writing is performed on the paper 200.
  • the paper carrying platform 4 includes a moving table 41, a bottom plate 42 disposed on an upper surface of the moving table 41, a storage table 43 disposed on an upper surface of the bottom plate 42, and a storage unit disposed thereon.
  • the paper platen 44 is provided with a plurality of hollows 441 for exposing the paper 200.
  • the driving device 5 is connected to the moving table 41 to drive the moving table 41 to reciprocate, the bottom plate 42 is for fixing the loading table 43 and the paper pre-tensioning device 10; the first paper pressing plate 44
  • the storage table 43 and the bottom plate 42 are sequentially disposed on the moving table 41 from top to bottom; the moving table 41 drives the paper 200 to reciprocate through the bottom plate 42 and the storage table 43 to Friction is generated between the writing instruments 2.
  • the first paper pressing plate 44 is used to press the paper 200 to avoid curling the paper 200 under the friction between the paper 200 and the writing instrument 2 when the moving table 41 is moved, thereby affecting the test effect. The phenomenon of misaligning test data.
  • the first paper pressing plate 44 has a plurality of hollows 441, the area of the first paper pressing plate 44 that is not hollowed out 441 is small, and is not easily connected to the storage table 43 and the bottom plate 42.
  • the screw passes through the first paper pressing plate 44, under the frictional force between the pen nib and the paper 200, it is easy to cause the screw to communicate with the hollow 441 near the two sides thereof, the first paper The platen 44 is shaken, thereby causing the paper 200 to be unstable.
  • the first paper platen 44 of the present invention is further provided with a second paper pressing plate 45, and the center of the second paper pressing plate 45 is hollowed out to be exposed.
  • the hollow 441 is removed, and the four corners of the second paper pressing plate 45, the first paper pressing plate 44, and the storage table 43 are threadedly connected to the bottom plate 42 from the top to the bottom by using four screws. Thereby a stable mounting of the first paper platen 44 is achieved.
  • the driving device 5 includes a controller 51 and a linear motor 52, and the computer 100, the controller 51, the linear motor 52, and the moving table 41 are sequentially connected, and the moving table is The direction of reciprocation of 41 is perpendicular to the cantilever beam 7.
  • the computer 100 controls the motion parameters of the motion mode (such as leftward and rightward), motion speed, motion displacement, motion acceleration, motion pause time, and the like by the controller 51, by setting different The motion parameters can simulate a variety of different writing states and writing speeds, so that the staff can more fully understand the writing feel of the writing instrument 2 during the testing process.
  • the strain gauge assembly 8 includes: a first strain gauge 81 and a second strain gauge, wherein the first strain gauge 81 and the second strain gauge are symmetrically disposed on an upper surface of the cantilever beam 7. And a lower surface; when the three-axis stage 31 adjusts the position of the cantilever beam 7 to bring the writing instrument 2 into contact with the paper 200, the three-axis stage 31 drives the cantilever beam 7 downward , the pressure of the writing instrument 2 on the paper 200 is increased, that is, the load on the paper 200 is increased, and the cantilever beam 7 is deformed (first deformation) by the first strain gauge 81 and the
  • the second strain gauge measures a first shape variable of the cantilever beam 7 to obtain load information applied by the writing instrument 2 to the paper 200, and the load when the writing instrument 2 is written can pass through the three-axis stage 31 is achieved by adjusting the height of the cantilever beam 7, the higher the cantilever beam 7, the smaller the deformation of the cantilever beam 7, the smaller the load generated by the
  • the strain gauge assembly further includes a third strain gauge 82 and a fourth strain gauge, the third strain gauge 82 and the fourth strain gauge being symmetrically disposed on the right side and the left side of the cantilever beam 7, the first
  • the center line of the three strain gauges 82 and the fourth strain gauge is parallel to the moving direction of the motion stage 41; the third strain gauge 82 and the fourth strain gauge are used to acquire frictional force information.
  • the paper pre-tensioning device 10 includes a first paper winding mechanism 101 and a second paper winding mechanism 102 symmetrically disposed on both sides of the bottom plate 42, and the two ends of the paper 200 are respectively associated with the first paper winding mechanism 101,
  • the second paper winding mechanism 102 is connected, and the first paper winding mechanism 101 and the second paper winding mechanism 102 rotate in opposite directions.
  • the linear motor 52 drives the moving table 41 to reciprocate in the left-right direction, and the first winding mechanism 101 and the second winding mechanism 102 are respectively located on the right and left sides of the bottom plate 42.
  • the three-axis stage 31 is located on the rear side of the stage 41.
  • the first paper winding mechanism 101 includes a bracket 103, a first ring 104 and a second ring 105 symmetrically disposed, a hollow column 106, a rotating shaft 107, and a reel 108;
  • the bracket 103 is screwed to the bottom plate 42.
  • the length direction of the bracket 103 is perpendicular to the moving direction of the bottom plate 42.
  • the second ring 105 and the first ring 104 are symmetrically disposed on the bracket 103.
  • the front end of the hollow column 106 is inserted into the first ring 104, and has an opening at the other end and faces the second ring 105; the first end of the rotating shaft 107 (ie, the rotating shaft 107)
  • the rear end is inserted into the hollow column 106 from the opening and is reciprocally slidable along the hollow column 106, and the second end of the rotating shaft 107 (ie, the front end of the rotating shaft 107) passes through the second circle a ring 105;
  • the rotating shaft 107 can reciprocally slide along the longitudinal direction of the bracket 103 with respect to the hollow column 106, and the rotating shaft 107 can also rotate in the hollow column 106; the first end of the rotating shaft 107
  • the elastic member 109 is connected to the hollow column 106, and the deformation direction of the elastic member 109 is parallel to the rotation.
  • a sliding direction of the second ring 105 a plurality of slots 110 are disposed on the inner wall of the second ring 105, and the outer wall of the rotating shaft 107 is provided with a plurality of tooth tips 111 engaging with the slots 110; 108 sleeves are disposed on the hollow column 106; the inner wall of the paper roll cylinder 108 is provided with a card slot that engages with the tooth tip 111.
  • the paper roll cylinder 108 and the rotating shaft 107 are connected by the engagement of the tooth tip 111 with the card slot.
  • the paper roll cylinder 108 can still be opposite.
  • the rotating shaft 107 slides back and forth, that is, the tooth tip 111 can slide back and forth with respect to the tooth groove 110, but the paper roll cylinder 108 cannot rotate relative to the rotating shaft 107.
  • the second end of the rotating shaft 107 passes through the second ring 105, so that the tooth tip 111 meshes with the tooth groove 110, restricting the rotation of the rotating shaft 107, thereby restricting the paper roll 108 from rotating. At this time, the elongation of the paper 200 is restricted, and it cannot be tensioned or slackened.
  • the rotating shaft 107 Since the first end of the rotating shaft 107 and the hollow column 106 are connected by the elastic member 109, pressing the second end of the rotating shaft 107 from the front to the rear, the rotating shaft 107 can be pushed into the hollow column 106. Sliding, the elastic member 109 is compressed, and when the tooth tip 111 moves between the first ring 104 and the second ring 105 and is separated from the slot 110, the rotating shaft 107 can be Rotating under the action of an external force to drive the reel 108 to rotate.
  • the rotating shaft 107 can be rotated clockwise (from the back to the front), so that the front end of the paper 200 is away from the bottom plate 42 so that The paper 200 is pre-tensioned, and the rotating shaft 107 can also be rotated counterclockwise (from the rear to the front) so that the right end of the paper 200 approaches the bottom plate 42 to loosen the paper 200.
  • the hollow column 106 has a plurality of slots 112 extending along the opening toward the rear end thereof.
  • the slot 112 communicates with the central hole of the hollow column 106, and the length of the slot 112 is smaller than The length of the hollow column 106;
  • the rotating shaft 107 is provided with a plurality of protrusions 113, and the protrusion 113 is engaged with the slot 112, when the rotating shaft 107 slides back and forth with respect to the hollow shaft, The protrusion 113 slides back and forth along the slot 112 and provides guidance for the front and rear sliding of the rotating shaft 107.
  • the second paper winding mechanism 102 is identical in principle to the first paper winding mechanism 101, and when the paper 200 pretensioning device is used, the first paper winding mechanism 101 and/or the second paper roll can be activated.
  • the mechanism 102 adjusts the tension and slack of the paper 200 as needed.
  • the gullet 110 is a right-inclined gullet
  • the tooth tip 111 is a right-inclined tooth tip.
  • the first paper winding mechanism 101 is adjusted from the back to the front, and the rotating shaft 107 is rotated clockwise to tension the paper 200; after the test is finished, the rotating shaft is pressed from the front to the back. 107, the tooth tip 111 is disengaged from the tooth groove 110, and the rotating shaft 107 is rotated counterclockwise to rotate the paper roll cylinder 108 counterclockwise, so that the right end of the paper 200 is approached to the storage table 43 The direction is moved to loosen the paper 200 to release the preload. After the pressing is stopped, the rotating shaft 107 is returned to the elastic member 109 to return to the elastic deformation force, and is reengaged with the tooth groove 110.
  • the data collection device 6 includes a bridge box 61, a signal amplifier 62, and a data acquisition card 63 connected in sequence; the bridge box 61 is connected to the strain gauge assembly 8; the data acquisition card 63 is connected to the computer 100.
  • the invention also provides a testing method based on a writing tool friction testing device, which comprises the steps of:
  • the step S100 is specifically as follows:
  • the upper end of the mounting member 95 is inserted into the sleeve 91 from the lower end opening of the sleeve 91, and the pen tip is placed in the The sleeve 91 is inserted into the threaded through hole and tightened, so that the limiting member 93 tightly holds the mounting member 95, and is pulled out when the staff uses a certain force.
  • the mounting member 95 is unable to be pulled out to stabilize the installation of the pen tip of the pen, and the mounting member 95 is displaced under friction by the friction between the pen tip and the paper 200 to affect the test data.
  • the connecting post 92 is inserted into the mounting hole at the bottom of the front end of the cantilever beam 7, and the upper surface of the second measuring disk 96 is completely in contact with the lower surface of the cantilever beam 7, so that the writing instrument 2 is completed. Mounting on the cantilever beam 7.
  • the moving table 41 is connected to the linear motor 52, and the stage 43 and the bottom plate 42 are sequentially placed from the top to the bottom onto the moving table 41, and the paper 200 is placed on the stage 43. Then, the first paper pressing plate 44 and the second paper pressing plate 45 are sequentially placed on the paper 200 in turn, and the second paper pressing plate 45, the first paper pressing plate 44, and the storage are screwed.
  • the table 43 and the bottom plate 42 are fixedly connected.
  • the leading end of the sheet 200 is connected to the reel 108 in the first reel mechanism 101, and the rear end of the sheet 200 is connected to the reel 108 in the second reel mechanism 102.
  • the step S200 specifically includes the following steps:
  • the driving device 5 under the action of the friction between the writing instrument 2 and the paper 200, the cantilever beam is further deformed, and the strain gauge assembly 8 collects load information and friction information, and utilizes
  • the data acquisition device 6 connected to the strain gauge assembly 8 analyzes and records the load information and the frictional force information, and calculates the acquisition friction coefficient by the computer 100 connected to the data acquisition device 6.
  • the linear motor 52 is activated to drive the motion table 41 to reciprocate left and right, and a sliding friction force is generated between the pen tip and the paper 200.
  • the first strain gauge 81, the second strain gauge, the third strain gauge 82, and the fourth strain gauge collect load information and frictional force information, and the data acquisition
  • the device 6 analyzes and records the load information and the frictional force information and acquires the corresponding load data and frictional force data, and the computer 100 calculates and obtains the corresponding friction coefficient based on the load data and the frictional force data.
  • the present invention provides a writing instrument friction testing device and a testing method thereof, which can install the writing instrument by the clamping device and position the writing tool to make the writing
  • the tool is inclined with respect to the paper at a predetermined writing angle, thereby simulating a state in which the human hand holds the writing instrument on the paper, and the friction coefficient is obtained by collecting the load and friction between the writing instrument and the paper.
  • the writing hand of the writing instrument is judged.

Landscapes

  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Biochemistry (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

本发明公开一种书写工具摩擦力测试装置及其测试方法，本发明能够通过所述夹持装置安装所述书写工具，并对所述书写工具进行定位，使所述书写工具相对于所述纸张成预设书写角度倾斜，从而模拟人手握所述书写工具在纸张上写作时的状态，通过采集所述书写工具与所述纸张之间的载荷和摩擦力获取摩擦系数来判断所述书写工具的书写手感。

Description

一种书写工具摩擦力测试装置及其测试方法 技术领域
本发明涉及摩擦测试装置技术领域，尤其涉及一种书写工具摩擦力测试装置及其测试方法。
背景技术
在书写时，书写工具与纸面接触并产生了摩擦力。书写工具尖端摩擦力的大小与书写者的书写感受密切相关。
就钢笔而言，钢笔业界、收藏界已经形成了一套相对固定的描述书写滑度感受的术语：顺滑、爽度、古熘、略带阻尼、涩、硬滑、“热刀切黄油”感等等，但是针对写感的描述太过于主观。目前关于笔尖书写过程中的手感舒适度或者书写手感，尚未有统一的定量检测方法，大多数情况下都是依靠具备丰富书写经验的专业技术人员，在不同的测试条件下进行反复书写对比，通过个人感受进行定性打分判断。
因此，现有技术还有待于改进和发展。
发明内容
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种书写工具摩擦力测试装置及其测试方法，旨在测试书写工具在纸张上书写时的摩擦系数，以判断书写工具的书写手感。
本发明解决技术问题所采用的技术方案如下：
一种书写工具摩擦力测试装置，其包括基座和书写工具，其中，所述基座上设置有位移调节装置、纸张承载平台、驱动装置、数据采集装置和计算机，所述位移调节装置上设置有悬臂梁，所述悬臂梁上设置有应变片组件，所述悬臂梁前端顶部设置有载荷调节装置，所述悬臂梁前端底部设置有夹持装置，所述纸张承载平台上设置有纸张、以及与所述纸张连接并将纸张拉展的纸张预紧装置，所述夹持装置用于夹持定位所述书写工具、并使所述书写工具相对于所述纸张成预设书写角度倾斜，所述驱动装置与所述纸张承载平台连接并驱动所述纸张承载平台往复运动，所述驱动装置还与所述计算机连接，所述应变片组件、所述数据采集装置以及所述计算机依次连接。
所述书写工具摩擦力测试装置，其中，所述夹持装置包括：套筒、连接柱、 以及若干个限位件；所述套筒的上端和下端均开口；所述连接柱固定设置在所述套筒外表面、并与所述悬臂梁垂直连接；所述套筒上设置有若干个螺纹通孔，所述限位件上设置有外螺纹，所述外螺纹与所述螺纹通孔相配合以使所述限位件的一端置于所述套筒内。
所述书写工具摩擦力测试装置，其中，所述书写工具为笔芯，所述笔芯穿过所述套筒，所述限位件顶持所述笔芯。
所述书写工具摩擦力测试装置，其中，所述书写工具为钢笔笔尖，所述套筒的下端开口内设置有安装件，所述安装件的一端置于所述套筒外并与所述钢笔笔尖连接，所述安装件用于将从所述套筒上端开口注入的墨水传递给所述钢笔笔尖，所述限位件顶持所述安装件。
所述书写工具摩擦力测试装置，其中，所述纸张承载平台包括：运动台、设置在所述运动台上表面的底板、设置在所述底板上表面的置物台、以及设置在所述置物台上方并与所述置物台连接的第一纸压板；所述纸张位于所述置物台与所述第一纸压板之间并可往复滑动；所述第一纸压板上设置有用于裸露所述纸张的若干个镂空。
所述书写工具摩擦力测试装置，其中，所述纸张预紧装置包括对称设置在所述底板两侧的第一卷纸机构和第二卷纸机构，所述纸张的两端分别与所述第一卷纸机构、所述第二卷纸机构连接，所述第一卷纸机构与所述第二卷纸机构将所述纸张的两端向远离所述底板方向卷动。
所述书写工具摩擦力测试装置，其中，所述第一卷纸机构包括：支架、对称设置的第一圆环和第二圆环、空心柱、转轴以及卷纸筒；所述空心柱的一端插入所述第一圆环内、另一端具有开口并朝向所述第二圆环；所述转轴的第一端从所述开口插入所述空心柱内并可沿所述空心柱往复滑动，所述转轴的第二端穿过所述第二圆环；所述转轴的第一端通过弹性件与所述空心柱连接，所述弹性件的形变方向平行于所述转轴的滑动方向；所述第二圆环内壁上设置有若干个齿槽，所述转轴的外壁上设置有若干个与所述齿槽啮合的齿尖；所述卷纸筒套设在所述空心柱上；所述卷纸筒内壁上设置有与所述齿尖啮合的卡槽。
所述书写工具摩擦力测试装置，其中，应变片组件包括对称设置在所述悬臂梁上表面和下表面的第一应变片、第二应变片；所述第一应变片和所述第二应变 片用于当所述位移调节装置通过调节所述悬臂梁的高度以调节所述书写工具对所述纸张产生的载荷时，根据所述悬臂梁的形变量测量所述纸张承受的载荷信息。
所述书写工具摩擦力测试装置，其中，所述数据采集装置包括依次连接的电桥盒、信号放大器以及数据采集卡；所述电桥盒与所述应变片组件连接；所述数据采集卡与所述计算机连接。
基于书写工具摩擦力测试装置的测试方法，其包括步骤：
分别对书写工具、纸张进行装夹和固定；
通过位移调节装置对书写工具进行位置调整及载荷调整；
启动驱动装置，由所述应变片组件采集载荷信息和摩擦力信息，利用与所述应变片组件连接的数据采集装置对载荷信息和摩擦力信息进行分析和记录，并利用与数据采集装置连接的计算机计算获取摩擦系数。
有益效果：本发明通过所述夹持装置安装所述书写工具，并对所述书写工具进行定位，使所述书写工具相对于所述纸张成预设书写角度倾斜，从而模拟人手握所述书写工具在纸张上写作时的状态，通过采集所述书写工具与所述纸张之间的载荷和摩擦力获取摩擦系数来判断所述书写工具的书写手感。
附图说明
图1是本发明中所述书写工具摩擦力测试装置的结构示意图；
图2是本发明中所述位移调节装置与所述夹持装置装配时的使用状态参考图；
图3是本发明较佳的实施例一中所述书写工具为笔芯时，所述书写工具与所述夹持装置的装配图；
图4是本发明较佳的实施例二中所述书写工具为钢笔笔尖时，所述夹持装置的分解示意图；
图5是本发明中所述驱动装置与所述纸张承载平台装配时的使用状态参考图；
图6是本发明中所述第一卷纸机构的结构示意图；
图7是本发明中所述空心柱与所述支架装配时的使用状态参考图；
图8是本发明中所述转轴的结构示意图；
图9是本发明中所述转轴、所述空心柱以及所述支架装配时的使用状态参考 图；
图10是本发明中所述齿尖与所述齿槽啮合时的使用状态参考图。
具体实施方式
为使本发明的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
请同时参阅图1-图10。本发明提供一种书写工具摩擦力测试装置，如图1和图5所示，其包括基座1和书写工具2，所述基座1上设置有位移调节装置3、纸张承载平台4、驱动装置5、数据采集装置6和计算机100，所述位移调节装置3上设置有悬臂梁7，所述悬臂梁7上设置有应变片组件8，所述悬臂梁7前端底部设置有夹持装置9，所述纸张承载平台4上设置有纸张200、以及与所述纸张200连接并将纸张200拉展的纸张预紧装置10，所述夹持装置9用于夹持定位所述书写工具2、并使所述书写工具2相对于所述纸张200成预设书写角度倾斜，所述驱动装置5与所述纸张承载平台4连接并驱动所述纸张承载平台4往复运动，所述驱动装置5还与所述计算机100连接，所述应变片组件8、所述数据采集装置6以及所述计算机100依次连接。
所述夹持装置9通过所述悬臂梁7与所述位移调节装置3连接，所述位移调节装置3通过调节所述悬臂梁7的位移，实现对所述夹持装置9位置的调节，当所述书写工具2与所述夹持装置9配合安装后，通过所述位移调节装置3便可将所述书写工具2调整到所述纸张承载平台4上方并与所述纸张承载平台4上放置的纸张200接触；再继续通过所述位移调节装置3调节所述悬臂梁7向下运动的距离来调节所述书写工具2对所述纸张200的载荷压力，使所述书写工具2与纸张200紧密接触；启动所述驱动装置5，所述驱动装置5带动所述纸张200往复移动，而所述书写工具2保持静止，从而模拟书写状态。
进一步的，由于人们使用所述书写工具2写作时，所述书写工具2会成一定角度倾斜，而不会垂直于纸张200，因此，为对判定所述书写工具2的书写手感提供更精确的测试数据，本发明中所述夹持装置9还用于对所述书写工具2进行定位，使所述书写工具2相对于所述纸张200成预设书写角度倾斜，从而模拟人手握所述书写工具2在纸张200上写作时的状态。
如图1所示，所述数据采集装置6与所述应变片组件8连接，用于通过所述应变片组件8获取所述纸张200往复移动时与所述书写工具2之间产生的摩擦力、以及所述书写工具2所承受的载荷，所述数据采集装置6将摩擦力数据和载荷数据发送给所述计算机100，并通过所述计算机100计算相对应的摩擦系数，从而为判定所述书写工具2的书写手感提供判定依据。
如图2所示，所述位移调节装置3包括三轴位移台31和转接架32，所述转接架32固定设置在所述三轴位移台31上、并用于安装所述悬臂梁7。所述三轴位移台31可以进行X轴(前后方向)、Y轴(左右方向)和Z轴(上下方向)的调节，以将所述书写工具2调节至纸张200正上方并与纸张200接触；其中，前、后、左、右、上、下方向如图1所示。
如图3和图4所示，所述夹持装置9包括：套筒91、连接柱92、以及若干个限位件93；所述套筒91的上端和下端均开口；所述连接柱92固定设置在所述套筒91外表面、并与所述悬臂梁7垂直连接；所述套筒91上设置有若干个螺纹通孔，所述限位件93上设置有外螺纹，所述外螺纹与所述螺纹通孔相配合以使所述限位件93的一端置于所述套筒91内；所述连接柱92与所述套筒91之间的夹角等于所述预设书写角度。
所述书写工具2为笔芯(如水笔笔芯、圆珠笔笔芯等自带墨水的书写工具2)或钢笔笔尖(没有自带墨水，需要外界提供墨水)。
较佳的实施例一：如图3所示，所述书写工具2为笔芯，所述连接柱92用于将所述套筒91与所述悬臂梁7连接，同时将所述套筒91定位在倾斜状态，以使所述套筒91相对于纸张200倾斜所述预设书写角度；所述套筒91用于安装所述笔芯，所述限位件93用于将所述笔芯限位在所述套筒91内。所述预设书写角度为锐角，较佳的，所述预设书写角度大于30°小于90°。
所述套筒91的上端、下端均具有开口，所述笔芯从所述套筒91的上端开口穿入所述套筒91并从所述套筒91的下端开口穿出，使所述笔芯的尖端裸露在所述套筒91外以便与纸张200接触；通过所述外螺纹与所述螺纹通孔的配合将所述限位件93拧入所述螺纹通孔内，并使所述限位件93的一端插入所述套筒91内与所述笔芯接触，随着所述限位件93旋入所述螺纹通孔的深度增加，所述限位件93对所述笔芯的顶持力增加，从而将所述笔芯定位在所述套筒91内。
较佳的实施例一中，所述连接柱92上设置有第一度量盘94，所述第一度量盘94具有中心孔并套设在所述连接柱92上，所述第一度量盘94垂直于所述连接柱92，所述悬臂梁7前端底部设置有安装孔，当所述连接柱92插入所述安装孔内并与所述安装孔完全配合时，所述第一度量盘94的上表面与所述悬臂梁7的下表面接触，以保证所述连接柱92完全垂直于所述悬臂梁7，进而保证所述笔芯相对于纸张200的倾斜角度等于所述预设书写角度。即所述第一度量盘94用于度量所述笔芯是否相对于纸张200倾斜所述预设书写角度。
较佳的实施例二：如图4所示，所述书写工具2为钢笔笔尖，所述套筒91的上端和下端均开口，所述套筒91的下端开口内设置有安装件95，所述安装件95的一端置于所述套筒91外并与所述钢笔笔尖连接，所述安装件95用于将从所述套筒91上端开口注入的墨水传递给所述钢笔笔尖，所述限位件93顶持所述安装件95。所述安装件95可相对于所述套筒91往复滑动；所述限位件93用于将所述安装件95限位在所述套筒91内。
所述连接柱92上设置有第二度量盘96，所述第二度量盘96具有中心孔并套设在所述连接柱92上，所述第二度量盘96垂直于所述连接柱92，所述悬臂梁7前端底部设置有安装孔，当所述连接柱92插入所述安装孔内并与所述安装孔完全配合时，所述第二度量盘96的上表面与所述悬臂梁7的下表面接触，以保证所述连接柱92完全垂直于所述悬臂梁7，进而保证所述笔芯相对于纸张200的倾斜角度等于所述预设书写角度。即所述第二度量盘96用于度量所述钢笔笔尖是否相对于纸张200倾斜所述预设书写角度。所述预设书写角度为锐角，较佳的，所述预设书写角度大于30°小于90°。
所述钢笔笔尖通过胶水与所述安装件95粘接，或在所述钢笔笔尖上设置卡槽，在所述安装件95上设置卡扣，通过卡扣与卡槽的卡合连接将所述钢笔笔尖安装在所述安装件95上。所述安装件95从所述套筒91的下端开口插入所述套筒91内并可沿所述套筒91往复滑动；将所述限位件93插入所述螺纹通孔内并旋紧，使所述限位件93的一端插入所述套筒91内并与所述安装件95接触，随着所述限位件93在所述螺纹通孔内的深入，所述限位件93对所述安装件95的顶持力增加，从而把所述安装件95限位在所述套筒91内。
将墨水从所述套筒91的上端开口滴入所述套筒91内，墨水通过所述安装件 95传递给所述钢笔笔尖，以使得所述钢笔笔尖可以在开启所述驱动装置5后在纸张200上进行书写。
如图5所示，所述纸张承载平台4包括：运动台41、设置在所述运动台41上表面的底板42、设置在所述底板42上表面的置物台43、以及设置在所述置物台43上方并与所述置物台43连接的第一纸压板44；所述纸张200位于所述置物台43与所述第一纸压板44之间并可沿左右方向往复滑动；所述第一纸压板44上设置有用于裸露所述纸张200的若干个镂空441。
所述驱动装置5与所述运动台41连接以驱动所述运动台41往复运动，所述底板42用于固定所述置物台43以及所述纸张预紧装置10；所述第一纸压板44、所述置物台43和所述底板42从上到下依次设置在所述运动台41上；所述运动台41通过所述底板42、所述置物台43带动纸张200往复运动从而与所述书写工具2之间产生摩擦。所述第一纸压板44用于将纸张200压展，避免产生所述运动台41运动时，在纸张200与所述书写工具2之间的摩擦力作用下使纸张200卷曲，影响测试效果、使测试数据失准的现象。
进一步的，由于所述第一纸压板44上有若干个镂空441，使得所述第一纸压板44上未镂空441的面积较小，并不易与所述置物台43以及所述底板42连接，当螺钉穿过所述第一纸压板44时，在所述钢笔笔尖与所述纸张200之间的摩擦力作用下，极易导致螺钉将靠近其两侧的镂空441连通，所述第一纸压板44晃动，进而导致纸张200固定不稳定，为解决这个问题，本发明中所述第一纸压板44上还设置有第二纸压板45，所述第二纸压板45的中心掏空以裸露出所述镂空441，且使用四个螺钉从上到下依次穿过所述第二纸压板45的四角、所述第一纸压板44、所述置物台43后与所述底板42螺纹连接，从而实现对所述第一纸压板44的稳定安装。
如图1所示，所述驱动装置5包括控制器51以及直线电机52，所述计算机100、所述控制器51、所述直线电机52以及所述运动台41依次连接，且所述运动台41的往复运动方向垂直于所述悬臂梁7。所述计算机100通过所述控制器51来控制所述运动台41的运动模式(如向左、向右)、运动速度、运动位移、运动加速度、运动间歇时间等运动参数，通过设定不同的运动参数可以模拟各种不同的书写状态与书写速度，使得工作人员可以较为全面的了解到所述书写工具 2测试过程中的书写手感。
如图2所示，所述应变片组件8包括：第一应变片81和第二应变片、所述第一应变片81与所述第二应变片对称设置在所述悬臂梁7的上表面和下表面；当所述三轴位移台31调节所述悬臂梁7的位置使所述书写工具2与所述纸张200接触后，所述三轴位移台31将所述悬臂梁7向下驱动，使得所述书写工具2对所述纸张200的压力增大，即所述纸张200所受载荷增加，所述悬臂梁7发生形变(第一形变)，通过所述第一应变片81和所述第二应变片测量所述悬臂梁7的第一形变量从而获取所述书写工具2对所述纸张200施加的载荷信息，所述书写工具2书写时的负载可以通过所述三轴位移台31对所述悬臂梁7的高度调节来实现，所述悬臂梁7越高，所述悬臂梁7形变越小，所述书写工具2对所述纸张200产生的载荷就越小；所述悬臂梁7越低，所述悬臂梁7形变越大，所述书写工具2对所述纸张200产生的载荷就越大。
所述应变片组件还包括第三应变片82和第四应变片，所述第三应变片82和所述第四应变片对称设置在所述悬臂梁7的右侧和左侧，所述第三应变片82与所述第四应变片的中心连线平行于所述运动台41的运动方向；所述第三应变片82和所述第四应变片用于获取摩擦力信息。当所述纸张200左右往复移动时，所述书写工具2与所述纸张200之间产生摩擦力，所述悬臂梁7在所述摩擦力的作用下产生第二形变；所述第三应变片82和所述第四应变片用于在所述纸张往复滑动导致所述悬臂梁7产生第二形变时，根据第二形变量测量所述书写工具2与所述纸张200之间产生的摩擦力信息。
所述纸张预紧装置10包括对称设置在所述底板42两侧的第一卷纸机构101和第二卷纸机构102，所述纸张200的两端分别与所述第一卷纸机构101、所述第二卷纸机构102连接，所述第一卷纸机构101与所述第二卷纸机构102转动方向相反。较佳的，所述直线电机52驱动所述运动台41沿左右方向往复运动，所述第一卷纸机构101和所述第二卷纸机构102分别位于所述底板42的右侧和左侧，所述三轴位移台31位于所述运动台41的后侧。
如图6-图9所示，所述第一卷纸机构101包括：支架103、对称设置的第一圆环104和第二圆环105、空心柱106、转轴107以及卷纸筒108；所述支架103与所述底板42螺钉连接，所述支架103的长度方向垂直于所述底板42的运动方 向，所述第二圆环105、所述第一圆环104对称设置在所述支架103的前后两端；所述空心柱106的一端插入所述第一圆环104内、另一端具有开口并朝向所述第二圆环105；所述转轴107的第一端(即所述转轴107的后端)从所述开口插入所述空心柱106内并可沿所述空心柱106往复滑动，所述转轴107的第二端(即所述转轴107的前端)穿过所述第二圆环105；所述转轴107相对于所述空心柱106可以沿所述支架103的长度方向往复滑动，同时所述转轴107还可在所述空心柱106内转动；所述转轴107的第一端通过弹性件109与所述空心柱106连接，所述弹性件109的形变方向平行于所述转轴107的滑动方向；所述第二圆环105内壁上设置有若干个齿槽110，所述转轴107的外壁上设置有若干个与所述齿槽110啮合的齿尖111；所述卷纸筒108套设在所述空心柱106上；所述卷纸筒108内壁上设置有与所述齿尖111啮合的卡槽。
所述卷纸筒108与所述转轴107通过所述齿尖111与所述卡槽的啮合而连接，所述齿尖111与所述卡槽卡合时，所述卷纸筒108依旧可相对于所述转轴107前后滑动，即所述齿尖111可相对于所述齿槽110前后滑动，但是所述卷纸筒108无法相对于所述转轴107转动。所述转轴107的第二端穿过所述第二圆环105，使得所述齿尖111与所述齿槽110啮合，限制所述转轴107的转动，进而限制所述卷纸筒108无法转动，此时所述纸张200的延展度被限制，既无法被张紧，也无法被松弛。由于所述转轴107的第一端与所述空心柱106通过所述弹性件109连接，从前向后按压所述转轴107的第二端，便可推动所述转轴107向所述空心柱106内滑动，所述弹性件109被压缩，当所述齿尖111移动至所述第一圆环104与所述第二圆环105之间且脱离所述齿槽110时，所述转轴107便可在外力作用下转动，以带动所述卷纸筒108转动，此时既可以将所述转轴107顺时针转动(从后向前看)，使所述纸张200的前端远离所述底板42从而将所述纸张200预紧，也可以将所述转轴107逆时针转动(从后向前看)，使所述纸张200的右端向所述底板42靠近从而将所述纸张200松弛。
进一步的，所述空心柱106上沿其开口向其后端方向延伸设置有若干个开槽112，所述开槽112与所述空心柱106的中心孔连通，所述开槽112的长度小于所述空心柱106的长度；所述转轴107上设置有若干个凸起113，所述凸起113与所述开槽112卡合，当所述转轴107相对于所述空心轴前后滑动时，所述凸起 113沿所述开槽112前后滑动、并为所述转轴107的前后滑动提供导向。
所述第二卷纸机构102与所述第一卷纸机构101原理相同，当使用所述纸张200预紧装置时，可以启动所述第一卷纸机构101和/或所述第二卷纸机构102，以对所述纸张200的张紧、松弛按需调节。
较佳的实施例，如图10所示，本发明中从后向前看，所述齿槽110为右向斜置齿槽，所述齿尖111为右向斜置齿尖，所述右向斜置齿槽与所述右向斜置齿尖啮合时，所述转轴107可相对于所述第二圆环105顺时针转动，并带动所述卷纸筒108顺时针转动，以使所述纸张200的右向远离所述置物台43方向滑动、张紧所述纸张200，而所述转轴107无法逆时针转动。进行测试实验时，从后向前看，调节所述第一卷纸机构101，将所述转轴107顺时针转动，以张紧所述纸张200；测试实验结束后，从前向后按压所述转轴107，使所述齿尖111脱离所述齿槽110，并逆时针转动所述转轴107，使所述卷纸筒108逆时针转动，从而使所述纸张200的右端向靠近所述置物台43方向移动，以松弛所述纸张200，解除预紧力。停止按压后，所述转轴107在所述弹性件109恢复弹性形变的作用力下回位，重新与所述齿槽110啮合。
如图1所示，所述数据采集装置6包括依次连接的电桥盒61、信号放大器62以及数据采集卡63；所述电桥盒61与所述应变片组件8连接；所述数据采集卡63与所述计算机100连接。
本发明还提供一种基于书写工具摩擦力测试装置的测试方法，其包括步骤：
S100、分别对书写工具2、纸张200进行装夹和固定；
以所述书写工具2为钢笔笔尖为例，步骤S100具体为：
将所述钢笔笔尖与所述安装件95的下端连接后，将所述安装件95的上端从所述套筒91的下端开口插入所述套筒91内，并使所述钢笔笔尖位于所述套筒91外；将所述限位件93插入所述螺纹通孔并拧紧，使所述限位件93紧紧顶持所述安装件95，并达到当工作人员使用一定的力度向外拔所述安装件95使无法拔出，以稳固所述钢笔笔尖的安装，避免所述钢笔笔尖与所述纸张200之间摩擦时所述安装件95在摩擦力作用下产生位移而影响测试数据。
将所述连接柱92插入所述悬臂梁7前端底部的安装孔，并使所述第二度量盘96的上表面与所述悬臂梁7的下表面完全接触配合，便完成所述书写工具2 在所述悬臂梁7上的安装。
将所述运动台41与所述直线电机52连接，将所述置物台43、所述底板42从上到下依次放置到所述运动台41上，将纸张200放置到所述置物台43上后，然后依次在所述纸张200上依次放置所述第一纸压板44、所述第二纸压板45，并用螺钉将所述第二纸压板45、所述第一纸压板44、所述置物台43和所述底板42固定连接。所述纸张200的前端与所述第一卷纸机构101中的卷纸筒108连接，所述纸张200的后端与所述第二卷纸机构102中的卷纸筒108连接。
S200、通过位移调节装置3对书写工具2进行位置调整及载荷调整；
所述步骤S200具体包括步骤：
S201、通过所述三轴位移台31调节所述钢笔笔尖的位置，使所述钢笔笔尖移动至所述纸张200正上方、并穿过所述镂空441与所述纸张200相接触；
S202、通过所述三轴位移台31控制所述悬臂梁7下移，增加所述钢笔笔尖与所述纸张200之间的载荷，所述悬臂梁7产生形变。
S300、启动驱动装置5，在所述书写工具2与所述纸张200之间摩擦力的作用下，所述悬臂梁进一步产生形变，由所述应变片组件8采集载荷信息和摩擦力信息，利用与所述应变片组件8连接的数据采集装置6对载荷信息和摩擦力信息进行分析和记录，并利用与数据采集装置6连接的计算机100计算获取摩擦系数。在保证所述钢笔笔尖与所述纸张200完全接触的情况下，启动所述直线电机52，带动所述运动台41左右往复运动，所述钢笔笔尖与所述纸张200之间产生滑动摩擦力，进一步引发所述悬臂梁7变形，所述第一应变片81、所述第二应变片、所述第三应变片82和所述第四应变片采集载荷信息和摩擦力信息，所述数据采集装置6对载荷信息和摩擦力信息进行分析和记录并获取相对应的载荷数据和摩擦力数据，所述计算机100根据载荷数据和摩擦力数据计算获取相应的摩擦系数。
综上所述，本发明提供了一种书写工具摩擦力测试装置及其测试方法，本发明能够通过所述夹持装置安装所述书写工具，并对所述书写工具进行定位，使所述书写工具相对于所述纸张成预设书写角度倾斜，从而模拟人手握所述书写工具在纸张上写作时的状态，通过采集所述书写工具与所述纸张之间的载荷和摩擦力获取摩擦系数来判断所述书写工具的书写手感。
应当理解的是，本发明的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (10)

  1. 一种书写工具摩擦力测试装置，其包括基座和书写工具，其特征在于，所述基座上设置有位移调节装置、纸张承载平台、驱动装置、数据采集装置和计算机，所述位移调节装置上设置有悬臂梁，所述悬臂梁上设置有应变片组件，所述悬臂梁前端底部设置有夹持装置，所述纸张承载平台上设置有纸张、以及与所述纸张连接并将纸张拉展的纸张预紧装置，所述夹持装置用于夹持定位所述书写工具、并使所述书写工具相对于所述纸张成预设书写角度倾斜，所述驱动装置与所述纸张承载平台连接并驱动所述纸张承载平台往复运动，所述驱动装置还与所述计算机连接，所述应变片组件、所述数据采集装置以及所述计算机依次连接。
  2. 根据权利要求1所述书写工具摩擦力测试装置，其特征在于，所述夹持装置包括：套筒、连接柱、以及若干个限位件；所述套筒的上端和下端均开口；所述连接柱固定设置在所述套筒外表面、并与所述悬臂梁垂直连接；所述套筒上设置有若干个螺纹通孔，所述限位件上设置有外螺纹，所述外螺纹与所述螺纹通孔相配合以使所述限位件的一端置于所述套筒内。
  3. 根据权利要求2所述书写工具摩擦力测试装置，其特征在于，所述书写工具为笔芯，所述笔芯穿过所述套筒，所述限位件顶持所述笔芯。
  4. 根据权利要求2所述书写工具摩擦力测试装置，其特征在于，所述书写工具为钢笔笔尖，所述套筒的下端开口内设置有安装件，所述安装件的一端置于所述套筒外并与所述钢笔笔尖连接，所述安装件用于将从所述套筒上端开口注入的墨水传递给所述钢笔笔尖，所述限位件顶持所述安装件。
  5. 根据权利要求1所述书写工具摩擦力测试装置，其特征在于，所述纸张承载平台包括：运动台、设置在所述运动台上表面的底板、设置在所述底板上表面的置物台、以及设置在所述置物台上方并与所述置物台连接的第一纸压板；所述纸张位于所述置物台与所述第一纸压板之间并可往复滑动；所述第一纸压板上设置有用于裸露所述纸张的若干个镂空。
  6. 根据权利要求5所述书写工具摩擦力测试装置，其特征在于，所述纸张预紧装置包括对称设置在所述底板两侧的第一卷纸机构和第二卷纸机构，所述纸张的两端分别与所述第一卷纸机构、所述第二卷纸机构连接，所述第一卷纸机构与所述第二卷纸机构将所述纸张的两端向远离所述底板方向卷动。
  7. 根据权利要求6所述书写工具摩擦力测试装置，其特征在于，所述第一 卷纸机构包括：支架、对称设置的第一圆环和第二圆环、空心柱、转轴以及卷纸筒；所述空心柱的一端插入所述第一圆环内、另一端具有开口并朝向所述第二圆环；所述转轴的第一端从所述开口插入所述空心柱内并可沿所述空心柱往复滑动，所述转轴的第二端穿过所述第二圆环；所述转轴的第一端通过弹性件与所述空心柱连接，所述弹性件的形变方向平行于所述转轴的滑动方向；所述第二圆环内壁上设置有若干个齿槽，所述转轴的外壁上设置有若干个与所述齿槽啮合的齿尖；所述卷纸筒套设在所述空心柱上；所述卷纸筒内壁上设置有与所述齿尖啮合的卡槽。
  8. 根据权利要求1所述书写工具摩擦力测试装置，其特征在于，所述应变片组件包括对称设置在所述悬臂梁上表面和下表面的第一应变片、第二应变片；所述第一应变片和所述第二应变片用于当所述位移调节装置通过调节所述悬臂梁的高度以调节所述书写工具对所述纸张产生的载荷时，根据所述悬臂梁的形变量测量所述纸张承受的载荷信息。
  9. 根据权利要求1所述书写工具摩擦力测试装置，其特征在于，所述数据采集装置包括依次连接的电桥盒、信号放大器以及数据采集卡；所述电桥盒与所述应变片组件连接；所述数据采集卡与所述计算机连接。
  10. 基于书写工具摩擦力测试装置的测试方法，其特征在于，其包括步骤：
    分别对书写工具、纸张进行装夹和固定；
    通过位移调节装置对书写工具进行位置调整及载荷调整；
    启动驱动装置，由所述应变片组件采集载荷信息和摩擦力信息，利用与所述应变片组件连接的数据采集装置对载荷信息和摩擦力信息进行分析和记录，并利用与数据采集装置连接的计算机计算获取摩擦系数。
PCT/CN2018/097904 2018-04-26 2018-08-01 一种书写工具摩擦力测试装置及其测试方法 WO2019205331A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810385641.1 2018-04-26
CN201810385641.1A CN108872064B (zh) 2018-04-26 2018-04-26 一种书写工具摩擦力测试装置及其测试方法

Publications (1)

Publication Number Publication Date
WO2019205331A1 true WO2019205331A1 (zh) 2019-10-31

Family

ID=64327252

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/097904 WO2019205331A1 (zh) 2018-04-26 2018-08-01 一种书写工具摩擦力测试装置及其测试方法

Country Status (2)

Country Link
CN (1) CN108872064B (zh)
WO (1) WO2019205331A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109540783B (zh) * 2019-01-08 2024-05-28 深圳大学总医院 一种弓丝托槽静摩擦系数测量装置
CN110186796B (zh) * 2019-05-30 2024-04-30 深圳大学 一种牙齿正畸矫正弓丝托槽摩擦磨损实验装置及测试方法
CN110186795B (zh) * 2019-05-30 2024-05-24 深圳大学 一种方弓丝与托槽摩擦装置及测试方法
CN110186797B (zh) * 2019-05-30 2024-05-10 深圳大学 一种口腔正畸矫正方弓丝摩擦磨损实验装置及其实验方法
CN117906932B (zh) * 2024-01-30 2025-04-08 济南凯镭迪精密仪器有限公司 一种自来水笔书写滑度检测装置及检测方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044615A (en) * 1975-12-01 1977-08-30 Rino Ghigini Electric sphygmomanometer
CN2557679Y (zh) * 2002-07-01 2003-06-25 陶秀枝 卷帘卷轴
CN1556382A (zh) * 2003-12-30 2004-12-22 上海交通大学 探针式组合压力传感器
JP2005114688A (ja) * 2003-10-10 2005-04-28 Hitachi Maxell Ltd ペン型入力装置の用紙検査装置
CN1760662A (zh) * 2005-10-25 2006-04-19 南京航空航天大学 二维小量程力传感器
CN101571434A (zh) * 2009-04-03 2009-11-04 天津市中天书写仪器有限公司 书写笔滑度的测试方法及装置
CN201819762U (zh) * 2010-08-30 2011-05-04 上海晨光文具股份有限公司 书写工具摩擦力测试仪
CN201883913U (zh) * 2010-11-26 2011-06-29 涂天仁 可调式卷帘卷轴
CN102830061A (zh) * 2012-09-18 2012-12-19 真彩文具股份有限公司 滑度仪
CN103424355A (zh) * 2013-08-30 2013-12-04 上海晨光文具股份有限公司 圆珠笔书写润滑度检测仪及其检测方法
CN206653812U (zh) * 2017-01-23 2017-11-21 合肥安达创展科技股份有限公司 一种机器人自适应高度硬笔平面绘图设备

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044615A (en) * 1975-12-01 1977-08-30 Rino Ghigini Electric sphygmomanometer
CN2557679Y (zh) * 2002-07-01 2003-06-25 陶秀枝 卷帘卷轴
JP2005114688A (ja) * 2003-10-10 2005-04-28 Hitachi Maxell Ltd ペン型入力装置の用紙検査装置
CN1556382A (zh) * 2003-12-30 2004-12-22 上海交通大学 探针式组合压力传感器
CN1760662A (zh) * 2005-10-25 2006-04-19 南京航空航天大学 二维小量程力传感器
CN101571434A (zh) * 2009-04-03 2009-11-04 天津市中天书写仪器有限公司 书写笔滑度的测试方法及装置
CN201819762U (zh) * 2010-08-30 2011-05-04 上海晨光文具股份有限公司 书写工具摩擦力测试仪
CN201883913U (zh) * 2010-11-26 2011-06-29 涂天仁 可调式卷帘卷轴
CN102830061A (zh) * 2012-09-18 2012-12-19 真彩文具股份有限公司 滑度仪
CN103424355A (zh) * 2013-08-30 2013-12-04 上海晨光文具股份有限公司 圆珠笔书写润滑度检测仪及其检测方法
CN206653812U (zh) * 2017-01-23 2017-11-21 合肥安达创展科技股份有限公司 一种机器人自适应高度硬笔平面绘图设备

Also Published As

Publication number Publication date
CN108872064A (zh) 2018-11-23
CN108872064B (zh) 2021-01-12

Similar Documents

Publication Publication Date Title
WO2019205331A1 (zh) 一种书写工具摩擦力测试装置及其测试方法
JP2004003944A (ja) 眼鏡枠形状測定装置
US20220397503A1 (en) Scratch tester for adhesion testing of coatings on surfaces
US5104021A (en) Optical fiber cutting apparatus and method
JP4912954B2 (ja) 硬度測定用引っかき傷生成装置
JPH11108816A (ja) 樹脂用引張試験装置
CN107436224A (zh) 弹簧力学性能的测试装置
JP4913543B2 (ja) 加圧装置
CN118258338B (zh) 一种自动校正工件位置的精密齿轮检测台
CN1272618C (zh) 织物单面低张力压缩情况下压力测试方法及装置
JP2002357520A (ja) 粘弾性測定装置
CN111189714B (zh) 无重力爆珠强度检测装置
JP3914006B2 (ja) 磁気ヘッド用研磨装置および方法
CN215600083U (zh) 一种黑胶唱片装置
JPH09318517A (ja) 塗膜硬度測定装置
KR101538236B1 (ko) 액적의 접촉각 측정기
CN113049938A (zh) 一种半挠性或挠性线路板的弯折性能测试装置及测试方法
JP2771097B2 (ja) ハ―ドディスクｚハイト管理システム
CN111649927A (zh) 一种多功能微针力学测试系统
CN213068537U (zh) 一种机械配件硬度检测装置
JPH0915137A (ja) 摩擦力測定装置および走査型摩擦力顕微鏡
JPS6315139A (ja) ひつかき硬さ試験装置
CN214502371U (zh) 镜头垂直度调校装置、摄像模块以及影像测量仪
CN222299149U (zh) 一种车用气弹簧综合测试台
JP2006003185A (ja) ゴム、プラスチック等の硬度測定装置および方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18917008

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC - FORM 1205A (04.02.2021)

122 Ep: pct application non-entry in european phase

Ref document number: 18917008

Country of ref document: EP

Kind code of ref document: A1