CN109375794B - Measuring system for measuring the extension of a thread or rope - Google Patents
Measuring system for measuring the extension of a thread or rope Download PDFInfo
- Publication number
- CN109375794B CN109375794B CN201811320274.3A CN201811320274A CN109375794B CN 109375794 B CN109375794 B CN 109375794B CN 201811320274 A CN201811320274 A CN 201811320274A CN 109375794 B CN109375794 B CN 109375794B
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- rope
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- line
- reference point
- driven wheel
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
- G01B11/043—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Abstract
The invention relates in particular to a measuring system for measuring the length of a thread or rope projecting from a reference point, a tensioning unit for keeping the thread or rope projecting from the reference point in a stretched state, and a measuring unit for measuring the length of the thread or rope projecting from the reference point. Through setting up taut unit, can guarantee that the line or rope is in the state of straightening, the extension length of the line or rope that measures like this is just accurate, and simultaneously, the measuring element sets up the side at the line or rope, just can detect out the extension length change of line or rope, and the device is very small and exquisite, practical, and the testing result is very accurate.
Description
Technical Field
The invention relates to the technical field of writing stationery, in particular to a measuring system for measuring the extension length of a wire or a rope.
Background
Common note recording schemes are all performed through paper and pens, with the improvement of the technological level, electronic products such as mobile phones and tablets are more and more popular nowadays, more and more people select the electronic products to take notes, and the most common electronic products are the cooperation of the tablet and a capacitance pen. Compared with the traditional paper pen scheme, the electronic product has the advantages that the electronic product is used for recording notes: firstly, paper pens are not needed, are all consumables and are needed to be purchased after use, and electronic products are not needed; secondly, the recording, modification, storage and viewing are convenient: when the electronic notes are recorded, only a mobile phone or a flat plate and a capacitance pen or a finger are required to be equipped, and paper and a pen are not required to be carried; the electronic note is very convenient to modify, the type and the color of the pen can be selected at will, and the recorded note is diversified; the electronic notes are convenient to store and copy and easy to find; thirdly, the electronic note can be stored for a long time and is not easy to lose, and other advantages are provided. However, due to the limitation of the current technology, the writing effect of the capacitive pen is inferior to the traditional paper pen effect, and the capacitive pen has a large pen head and cannot freely write like the traditional paper pen, so that many people still continue to choose the paper pen mode to take notes. In order to solve the defects of the capacitance pen, the applicant proposes a scheme that a pen point of the pen to be positioned is connected with a wire or a rope, and then the position information of the pen point is obtained by measuring the extension length of the wire or the rope, and a scheme that the extension length of the wire or the rope can be measured needs to be arranged.
Disclosure of Invention
The invention aims to provide a measuring system for measuring the extension length of a wire or a rope, which can conveniently detect the extension length of the wire or the rope.
In order to realize the purpose, the invention adopts the technical scheme that: a measuring system for measuring the length of a line or rope extending from a reference point, a tensioning unit for maintaining the line or rope extending from the reference point in a taut condition, and a measuring unit for measuring the length of the line or rope extending from the reference point.
Compared with the prior art, the invention has the following technical effects: through setting up taut unit, can guarantee that the line or rope is in the state of straightening, the extension length of the line or rope that measures like this is just accurate, and simultaneously, the measuring element sets up the side at the line or rope, just can detect out the extension length change of line or rope, and the device is very small and exquisite, practical, and the testing result is very accurate.
Drawings
FIG. 1 is a functional block diagram of a positioning system;
FIG. 2 is a schematic view of the structure of FIG. 1;
FIG. 3 is a functional block diagram of a positioning system with calibration functionality;
FIG. 4 is a schematic view of the structure of FIG. 3;
FIG. 5 is a schematic diagram of the handwriting of the letter A processed by the handwriting processing method of the invention;
FIG. 6 is a schematic view of the tension unit;
FIG. 7 is a schematic view of a direction detection module;
FIG. 8 is a schematic structural diagram of a first embodiment of wire or rope length detection;
FIG. 9 is a schematic structural view of a second embodiment of wire or rope length detection;
FIG. 10 is a schematic view of a measurement system configuration incorporating the measurement line or rope extension of FIG. 8;
FIG. 11 is a schematic view of a measurement system configuration incorporating the measurement line or rope extension of FIG. 9;
FIG. 12 is a schematic structural view of a pressure detecting unit;
FIG. 13 is a schematic structural diagram of a notebook capable of storing handwriting;
FIG. 14 is an enlarged view of a portion of the nib of FIG. 13;
fig. 15 is a schematic structural diagram of a mobile phone or tablet protective case with a writing function.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 to 15.
Referring to fig. 1, a positioning device comprises a first line or rope 10a passing through a first reference point 20a, a second line or rope 10b passing through a second reference point 20b, a tensioning unit 30, a measuring unit 40 and a processing unit 50, wherein the overhanging ends of the first line or rope 10a and the second line or rope 10b are connected with a unit to be positioned. One side of the straight line passing through the first reference point 20a and the second reference point 20b forms a region to be positioned, that is, the region to be positioned is on one side of the straight line, so that the distances L1 and L2 between any point of the region to be positioned and the first reference point 20a and the second reference point 20b correspond to a unique point, and the region on the right side of the dotted line in fig. 1 forms the region to be positioned. The tensioning unit 30 is used for keeping the first string or rope 10a extending from the first reference point 20a and the second string or rope 10b extending from the second reference point 20b in a stretched state, the measuring unit 40 is used for measuring the length L1 of the first string or rope 10a extending from the first reference point 20a and the length L2 of the second string or rope 10b extending from the second reference point 20b, and the measured lengths are only the linear lengths when the first string or rope 10a and the second string or rope 10b are stretched by the tensioning unit 30, so that subsequent position calculation can be conveniently carried out. And the processing unit receives the lengths L1 and L2 and calculates to obtain the position of the position to be positioned in the area to be positioned. By selecting the first reference point 20a and the second reference point 20b of the fixed position, and then measuring the extension lengths L1 and L2 of the first string or rope 10a and the second string or rope, the length L1 here is also the distance between the position to be positioned and the first reference point 20a, and the length L2 is also the distance between the position to be positioned and the second reference point 20 b.
Referring to fig. 2, the positioning plate 60 includes a square positioning plate 60, a protruding strip 61 is disposed on a plate surface of the positioning plate 60, the protruding strip 61 is disposed adjacent to one side of the plate surface of the positioning plate 60, a step is formed between the protruding strip 61 and the plate surface of the positioning plate 60, two through holes are spaced on the step to form the first reference point 20a and the second reference point 20b, and the positioning plate 60 is hollow for accommodating the tensioning unit 30, the measuring unit 40 and the processing unit 50. After the positioning plate is arranged in this way, the plate surface of the positioning plate 60 without the convex strip 61 forms the area to be positioned; two through holes are formed in the step formed by the positioning plate 60 and the convex strip 61, the positions of the two through holes are fixed, so that a first reference point 20a and a second reference point 20b are formed, the first line or rope 10a extends out of the first reference point 20a, the second line or rope 10b extends out of the second reference point 20b, and overhanging ends of the two lines or ropes are connected with the unit to be positioned, so that when the unit to be positioned moves on the plate surface of the positioning plate 60, the extending lengths of the first line or rope 10a and the second line or rope 10b are driven to change, and the extending lengths are processed by the processing unit 50, so that the position information of the unit to be positioned on the positioning plate 60 can be obtained.
Generally, two reference points and two wires or ropes are arranged to realize the positioning of a position to be positioned, and in order to ensure the positioning accuracy, the invention further comprises the following steps: the positioning device comprises a third line or rope 10c passing through a third reference point 20c, wherein the overhanging end of the third line or rope 10c is connected with a unit to be positioned, and the third reference point 20c is not collinear with the other two reference points. The area enclosed by the rectangle with four sides passing through the three reference points forms an area to be positioned, and the statement can also be understood as follows: a rectangle is fitted through the first reference point 20a, the second reference point 20b and the third reference point 20c, and the rectangle forms an area to be located, and mathematically, any number of rectangles can be drawn through the three non-collinear three points, and only one rectangle needs to be selected, for example, the dashed square in fig. 3 is an optionally selected area to be located. The tensioning unit 30 is used for keeping a third wire or rope 10c extending from the third reference point 20c in a stretched state, the measuring unit 40 is used for measuring a length L3 of the third wire or rope 10c extending from the third reference point 20c, the processing unit 50 corrects the position of the unit to be positioned in the area to be positioned according to the length L3, since the position of the unit to be positioned can be calculated through the lengths L1 and L2, the distance between the calculated position and the third reference point 20c is not necessarily exactly equal to the length L3, and the calculated position coordinate can be finely adjusted at this time, so that the distance between the calculated position and the third reference point 20c is equal to L3.
Fig. 4 is an instantiation structure of fig. 3, including a square positioning plate 60, a protrusion 61 of an L shape is provided on the plate surface of the positioning plate 60, the long side of the protrusion 61 is parallel and adjacent to the long side of the plate surface of the positioning plate 60, the short side of the protrusion 61 is parallel and adjacent to the wide side of the plate surface of the positioning plate 60, a step is formed between the protrusion 61 and the plate surface of the positioning plate 60, two through holes are provided at intervals on the step at the long side of the protrusion 61 to form the first reference point 20a and the second reference point 20b, a through hole is provided on the step at the short side of the protrusion 61 to form the third reference point 20c, and the positioning plate 60 is hollow to accommodate the tensioning unit 30, the measuring unit 40 and the processing unit 50. After the positioning plate is arranged in this way, the plate surface of the positioning plate 60 without the convex strip 61 forms the area to be positioned; the first line or rope 10a extends from the first reference point 20a, the second line or rope 10b extends from the second reference point 20b, the third line or rope 10c extends from the third reference point 20c, and overhanging ends of the three lines or ropes are all connected with the unit to be positioned, so that when the unit to be positioned moves on the plate surface of the positioning plate 60, the extending lengths of the first line or rope 10a, the second line or rope 10b and the third line or rope 10c are driven to change, the extending lengths are processed by the processing unit 50, and the position information of the unit to be positioned on the positioning plate 60 can be obtained, and the device is very convenient to detect.
The position information of the unit to be positioned can be acquired through the structure, so that the motion trail of the unit to be positioned can be acquired only by continuously detecting the position information of the unit to be positioned, and therefore, the handwriting of a pen can be recorded by using the positioning device. In this embodiment, specifically, the position-to-be-positioned unit is a pen 70 capable of writing or performing analog writing, the pen capable of performing writing is a common gel ink pen, a pencil, or the like capable of writing a writing on paper, and the pen capable of performing analog writing is a pen having a pen shape but not capable of writing a writing, for example, a common capacitive pen may be considered as a pen capable of performing analog writing; the overhanging ends of the first line or rope 10a and the second line or rope 10b are connected with the pen points of the pen 70, and writing paper or a display screen placed on the board surface of the positioning board 60 forms the area to be positioned; during normal writing, the pen 70 is not continuous when moving on the positioning plate 60, and includes two states: one is that the pen 70 writes on the positioning plate 60; secondly, the pen 70 is separated from the positioning plate 60 to move the position of the pen point. If the position of the pen point of the pen 70 is always detected, the pen point of the pen 70 at many positions is not written and is invalid position information, so the present embodiment further includes a pressure detection unit 80 for detecting whether the pen point is writing, if the pressure detection unit 80 detects that the pen point is writing, the position information at this time is valid, and if the pressure detection unit 80 detects that the pen point is not writing and the pen point is moving away from the positioning plate 60, the position information at this time is invalid. The processing unit 50 only needs to convert the position information of the pen point during writing into electronic handwriting.
The invention provides a handwriting processing method based on pen point position, which does not need excessive calculation and has very high processing speed, and comprises the following steps: (S1) initializing the size and color of the electronic paper and the handwriting, wherein the color of the electronic paper is different from that of the handwriting, so that the electronic paper and the handwriting can be obviously distinguished, and a user can conveniently check the electronic paper and the handwriting; generally, the color of the electronic paper is mostly white or kraft paper, and the handwriting is mostly black, red or blue; the thickness of the handwriting is d, and the handwriting detection period is T; (S2) every time the time T elapses, the processing unit 50 receives the output information of the pressure detecting unit 80 and the measuring unit 40 and performs the following steps; (S3) the processing unit 50 judges whether the pen tip is writing according to the pressure detecting unit 80, if the pen tip is writing, executes the next step, otherwise returns to step S2; (S4) the processing unit 50 converts the distance information output from the measuring unit 40 into coordinates (x, y); (S5) the processing unit 50 draws the circular selection area with the coordinates (x, y) as the center of circle and the size d as the diameter, modifies the color of all the pixels in the circular selection area to the color of the handwriting, and returns to step S2. FIG. 5 is the handwriting drawn by the above steps, and for convenience of viewing, the color in the circular selection area in FIG. 5 is not modified to be the handwriting color, and through the above steps, the position information is not required to be curve-fitted to form the track, so that the complicated operation is not required; the area beside the position (x, y) is simply dyed, and finally continuous handwriting is formed through continuous dyeing, although the handwriting obtained by the scheme is not smooth enough, the handwriting can be used sufficiently.
When the position of the pen 70 in the area to be positioned is obtained, the actual relative position of the pen tip of the pen 70 with respect to the first reference point 20a and the second reference point 20b is obtained, and when the position of the writing paper or the display screen placed on the positioning board 60 changes, the relative position of the pen tip on the writing paper or the display screen has changed even though the position of the pen tip has not changed. In order to avoid the occurrence of such errors, the step S1 further includes a coordinate calibration step: (S11) setting a reference origin on the writing paper or the display screen; (S12) moving the pen tip to the reference origin position, the processing unit 50 converting the distance information output from the measuring unit 40 into reference coordinates (x0, y 0); in step S5, the processing unit 50 draws a circle with the coordinates (x-x0, y-y0) as the center. Therefore, the accuracy of handwriting can be ensured when the paper is replaced or the calibration is carried out at intervals. The reference origin is arbitrarily selected, as long as the position of the reference origin is ensured to be on the paper surface of the writing paper or in the screen area of the display screen; the reference origin is the new coordinate system origin, the coordinates (x-x0, y-y0) are the coordinate values in the new coordinate system, the coordinates are relative coordinates, namely the coordinates relative to the reference origin, after the reference origin is calibrated each time, handwriting is drawn through the relative coordinates, and the result is very accurate.
There are many methods for calculating the position coordinates (x, y) of the location unit to be located in the area to be located, and in the present invention, the processing unit 50 preferably converts the distances L1, L2 into position information according to the following steps: (A) establishing a coordinate system by taking the middle point of a connecting line of a first reference point 20a and a second reference point 20b as an origin, wherein in the coordinate system, the coordinates of the first reference point 20a are (0, b), the coordinates of the second reference point 20b are (0, -b), wherein b is equal to half of the distance between the first reference point 20a and the second reference point 20b, b is a constant, and in the coordinate system, an area to be positioned is an area with the X axis as a positive number; (B) the position coordinates (x, y) of the position location unit in the area to be located are calculated according to the following formula:
the above formula is directly stored in the processing unit 50, and the processing unit 50 can calculate the coordinates (x, y) conveniently by substituting the distances L1, L2 and the distance b into the above formula, and it should be noted that the coordinates (x, y) here are absolute coordinates, that is, the position of the position to be located in the coordinate system established in step a.
There are many configurations of the tension unit 30 and the measuring unit 40 that can be implemented and, in practice, designed as a whole. The invention also discloses a measuring system for measuring the extending length of the line or the rope, which comprises the line or the rope 10, a reference point 20, a tensioning unit 30 and a measuring unit 40, wherein the line or the rope 10 extends from the reference point 20, the tensioning unit 30 is used for keeping the line or the rope 10 extending from the reference point 20 in a stretched state, and the measuring unit 40 is used for measuring the extending length of the line or the rope 10 from the reference point 20. Thus, when the positioning device is formed, only two or three groups of such measuring systems need to be arranged, and then the overhanging end of the wire or rope 10 is connected with a position to be positioned; the measuring system may also be used in other applications where it is desirable to measure the length of an extended line or rope 10, such as tape measures and the like.
The structure of the tension unit 30 is various, and referring to fig. 6, it is preferable in the present invention that: the tension unit 30 includes a reel 31 and a coil spring 32, one end of the string or rope 10 is fixed on the reel 31, and the string or rope 10 is extended to drive the reel 31 to rotate in a direction opposite to the rotation direction of the reel 31 driven by the elastic force of the coil spring 32, so that the string or rope 10 is always in a straightened state under the elastic force of the coil spring 32. The structure is simple, and the tensioning is very reliable.
Referring to fig. 7, there are also many implementations of the structure of the measuring unit 40, since the present invention mainly measures the length change of the string or rope 10, it is also necessary to detect the moving direction of the string or rope 10. Preferably, the measuring unit 40 includes a direction detecting module 41, the direction detecting module 41 includes a first partition 411, a second partition 412 and a driven sleeve 413, the thread or rope 10 extending from the reel 31 sequentially passes through a through hole formed on the first partition 411 and a through hole formed on the second partition 412 and then extends from the reference point 20, the driven sleeve 413 is sleeved on the thread or rope 10 between the first partition 411 and the second partition 412, the inner diameter of the driven sleeve 413 is slightly larger than the outer diameter of the thread or rope 10, so that the thread or rope 10 can drive the driven sleeve 413 to move together when moving, and the thread or rope 10 can still move independently when the driven sleeve 413 is blocked by the first partition 411 or the second partition 412; two contacts are respectively arranged on the opposite surfaces of the first partition 411 and the second partition 412, the driven sleeve 413 is made of a conductive material, the two contacts on the first partition 411 are conducted when the driven sleeve 413 abuts against the first partition 411, the two contacts on the second partition 412 are conducted when the driven sleeve 413 abuts against the second partition 412, and the processing unit 50 judges the movement direction of the string or rope 10 according to the conduction state of the contacts. When the wire or rope 10 extends out of the reference point 20, the wire or rope 10 inevitably drives the driven sleeve 413 to move towards one side of the second partition 412, when the driven sleeve 413 abuts against the second partition 412, two contacts on the first partition 411 are disconnected, two contacts on the second partition 412 are conducted, and the processing unit 50 determines that the wire or rope 10 extends out after receiving the contact conduction on the second partition 412, and the driven sleeve 413 does not move after abutting against the second partition 412 due to the blocking of the second partition 412; similarly, when the tensioning unit 30 tensions the string or rope 10, the string or rope 10 drives the driven sleeve 413 to move toward the first partition 411, and the processing unit 50 determines that the string or rope 10 is retracted inward when receiving the contact conduction on the first partition 411. The direction detection module 41 can be very small, its structure is very simple, and the direction detection is very reliable.
Further, the height of the two contacts on the first partition 411 protruding out of the plate surface of the first partition 411 is the same, the height of the two contacts on the second partition 412 protruding out of the plate surface of the second partition 412 is the same, and the distance L4 between the contacts on the first partition 411 and the contacts on the second partition 412 and the length L5 of the driven sleeve 413 satisfy the following relation: L4-L5 is more than 0 and less than 2 mm. L4 must be longer than L5 so that the driven sleeve 413 can move between the first compartment 411 and the second compartment 412; however, the L4 cannot be too long compared to the L5, and if the L4 is too long, the direction detection module 41 cannot detect the direction change in time when the line or rope 10 changes direction, theoretically, the L4 is a little longer than the L5, and can be 0.05mm, so that the timeliness of the direction detection can be ensured.
The line or rope 10 may be selected from stainless steel thin line or fishing line, and there are many possible ways to detect the length of the line or rope 10, and two specific embodiments are provided for reference in the present invention.
Referring to fig. 8, in the first embodiment, the string or rope 10 includes a transparent segment 11 and a non-transparent shielding segment 12 connected end to end, the transparent segment 11 and the shielding segment 12 are equal in length and are arranged at an interval, a photoelectric detection module 42 is disposed beside the string or rope 10 between the reel 31 and the reference point 20 for detecting the light transmittance of the string or rope 10, and the processing unit 50 calculates the variation Δ L ═ a ═ k of the protruding length of the string or rope 10 according to the variation times k of the light transmittance and the length a of the transparent segment. By selecting the wire or rope 10 consisting of the transparent section 11 and the shielding section 12, the change value of the extension length can be judged by monitoring the light transmittance of the wire or rope 10 when the wire or rope 10 moves, which is very convenient.
In order to facilitate installation of the photodetection module 42, in this embodiment, preferably, the measuring unit 40 includes an installation seat 43, a cross section of the installation seat 43 along a length direction thereof is "E" shaped, a first through hole 431 is formed on a middle cross plate of the installation seat 43 along the length direction of the installation seat 43 for the wire or rope 10 to pass through, and an aperture of the first through hole 431 is consistent with an outer diameter of the wire or rope 10; the middle transverse plate of the mounting seat 43 is further provided with a second through hole 432, the second through hole 432 is intersected with the first through hole 431 and perpendicular to the first through hole 431, the aperture of the second through hole 432 is smaller than or equal to that of the first through hole 431, the photoelectric detection module 42 comprises a light emitting tube 421 and a first photosensitive resistor 422 which are respectively arranged in two grooves of the mounting seat 43, and light emitted by the light emitting tube 421 is incident on the first photosensitive resistor 422 through the second through hole 432. Through the mount pad 43 that sets up "E" style of calligraphy, installation photoelectric detection module 42 that can be convenient to through setting up first through-hole 431 and second through-hole 432, the luminousness to certain place on line or rope 10 that can be convenient carries out reliable detection, and this structure is very simple and convenient, convenient processing and installation.
Furthermore, the mounting base 43 on be provided with the apron 45, apron 45 lid closes on the mounting base 43 side opening of "E" style of calligraphy, and apron 45 all is provided with the turn-ups along the both ends of mounting base 43 length direction and is used for the lid to close the both ends at mounting base 43, offers flutedly on the turn-ups of apron 45 and avoids apron 45 to take place to interfere with line or rope 10 when covering. After the cover plate 45 is arranged, the interference of ambient light can be avoided, the reliability of light transmittance detection is greatly improved, the detection precision is ensured, and the change of the extension length of the wire or rope 10 detected in the way is very accurate.
Referring to fig. 9, in the second embodiment, the measuring unit 40 includes a driven wheel 44, the driven wheel 44 includes a first driven wheel 441 and a second driven wheel 442, the axes of the first driven wheel 441 and the second driven wheel 441 are overlapped and are adjacently arranged along the axis direction, a thread or rope 10 extending from the reel 31 passes around the first driven wheel 441 and then extends from the reference point 20, a plurality of small holes are evenly arranged at intervals along the circumferential direction at the outer peripheral edge of the second driven wheel 442, a photoelectric detection module 42 is arranged beside the small holes for detecting the light transmittance of the second driven wheel 442, and the processing unit 50 calculates the variation value Δ L of the extension length of the thread or rope 10 as (2 pi θ/180) · k · r according to the variation number k of the light transmittance, the central angle θ of the two adjacent small holes on the second driven wheel 442, and the radius r of the first driven wheel 441. The central angle θ is an angle, and if 100 second driven wheels 442 are uniformly arranged along the circumferential direction at intervals, the central angle θ of two adjacent small holes is 360 °/100, that is, 3.6 °; in practical applications, the larger the radius of the second driven wheel 442, the more holes can be formed in the outer peripheral area thereof, and the smaller the central angle θ between two adjacent holes, so that the calculation of the extending length of the string or rope 10 is more accurate, but the system volume is increased correspondingly; meanwhile, the smaller the radius of the first driven wheel 441 is, the more accurate the calculation of the protruding length of the wire or rope 10 is; in actual selection, the calculation accuracy of the protruding length of the wire or rope 10 can be improved by selecting the appropriate radius of the first driven pulley 441 and the second driven pulley 442.
Further, the measuring unit 40 includes a mounting base 43, a cross section of the mounting base 43 along a length direction thereof is "Contraband", an outer peripheral area of a small hole provided on the second driven wheel 442 is located in a groove of the "Contraband", the photoelectric detection module 42 includes a light emitting tube 421 and a first photo resistor 422 respectively provided on an inner wall of the groove of the mounting base, and light emitted from the light emitting tube 421 passes through the small hole on the second driven wheel 442 and is incident on the second photo resistor 84. The photoelectric detection module 42 detects the light transmittance of the edge of the second driven wheel 442, so that the number of small holes which the second driven wheel 442 rotates can be detected, the rotation angle of the second driven wheel 442 can be known, the second driven wheel 442 and the first driven wheel 441 are coaxially arranged, the rotation angle of the first driven wheel 441 can be known, and the extension length change value of the string or rope 10 can be calculated according to the radius of the first driven wheel 441.
In the second embodiment, a special wire or rope 10 is not required, but a suitable material of the wire or rope 10 and a suitable material of the first driven wheel 441 are selected to ensure a certain friction force between the first driven wheel and the second driven wheel, so that the first driven wheel 441 can be reliably driven to rotate together when the wire or rope 10 moves. Therefore, it is preferable that the string or rope 10 extending from the reel 31 extends from the reference point 20 after surrounding the first driven wheel 441 for one to three circles, and the outer contour of the first driven wheel 441 is circular or regular polygon, so that it is ensured that the string or rope 10 will inevitably rotate the first driven wheel 441 together and move synchronously.
Referring to fig. 10 and 11, which are schematic structural views of two specific embodiments of the measuring system, respectively corresponding to the two embodiments, the transparent section 11 and the shielding section 12 of the string or rope 10 wound on the reel 31 in fig. 10 are not shown in order to make the figures more concise and clearer. It should be noted that the drawing is provided in the order of the tension unit 30, the direction detection module 41 and the length detection module, and in fact, the order of the direction detection module 41 and the length detection module may be reversed, i.e., the measurement system may be provided in the order of the tension unit 30, the length detection module and the direction detection module 41.
In addition, since the above length detection is to detect the variation value, in practical application, the initial extension length of the wire or rope 10 of the measuring system can be measured and stored, and then the processing unit 50 calculates the initial extension length according to the variation value, so as to obtain the actual extension length of the wire or rope 10.
Referring to fig. 12, there are also many implementations of the pressure detection unit 80, in the present invention, preferably, the pen 70 includes a pen container 71 and a pen core 72, the pressure detection unit 80 includes a resistance strain gauge 81 and a first detection circuit 82, the resistance strain gauge 81 is disposed in the pen container 71, a rear end of the pen core 72 abuts against the resistance strain gauge 81, the pen core 72 presses the resistance strain gauge 81 to change a resistance value thereof when the pen 70 writes, and the first detection circuit 82 detects a resistance of the resistance strain gauge 81, processes the resistance value, and outputs a writing signal to the processing unit 50. With the arrangement, when writing, the pen core 72 presses the resistance strain gauge 81, and the resistance value of the resistance strain gauge 81 changes significantly compared with the resistance value when the resistance strain gauge is not pressed, so that whether the pen 70 is writing or not can be detected reliably through the detection of the resistance value.
The detection result of the pressure detection unit 80 can be directly transmitted to the processing unit 50 through a wire, or can be transmitted in a wireless manner, such as through a bluetooth module. In the wired scheme, a wire needs to be arranged between the pen 70 and the positioning plate 60, which is inconvenient; and the Bluetooth module is arranged, so that the cost of the system is increased. It is preferable here that the pen 70 includes a pen container 71 and a pen core 72, the pressure detecting unit 80 includes a resistance strain gauge 81 provided in the pen container 71, a first detecting circuit 82, the rear end of the pen core 72 abuts against the resistance strain gauge 81, when the pen 70 writes, the pen core 72 presses the resistance strain gauge 81 to cause the resistance value of the resistance strain gauge 81 to change, the first detection circuit 82 detects the resistance of the resistance strain gauge 81 and drives the light emitting circuit 83 to act, the part, close to the pen point, of the pen container 71 is made of transparent materials and used for emitting light of the light emitting circuit 83, the second light sensitive resistor 84 detects light emitted by the light emitting circuit 83 and converts the light into the resistance value change, and the second detection circuit 85 detects the resistance of the second light sensitive resistor 84 and outputs whether a writing signal to the processing unit 50 after processing the resistance value. Unlike the previous solution, here, the first detection circuit 82 detects the resistance value change of the resistance strain gauge 81 and drives the light emitting circuit 83 to operate, for example, when the pen is writing, the light emitting circuit 83 operates, the LED lamp lights up and emits light, when the pen is not writing, the light emitting circuit 83 does not operate, and the LED lamp goes out; then set up the light change that second photo resistance 84 comes detection light emitting circuit 83 again, the resistance that detects second photo resistance 84 through second detection circuitry 85 at last judges whether second photo resistance 84 senses light emitting circuit 83 changes, thus, need not to set up the wire, also need not to set up bluetooth module, can realize the wireless transmission of signal with lower cost, and use very reliably, and also very practical, even when writing with pen 70, the light of light emitting circuit 83 transmission can improve the regional light intensity of writing, play the effect of protection eyes.
The invention also discloses two specific application scenarios to elaborate the use of the above structure.
Using scene one, referring to fig. 13 and 14, a notebook capable of storing handwriting, which includes a rectangular positioning plate 60, where a convex strip 61 is disposed on the left side or the right side of the positioning plate 60, two reference points 20 are disposed on the convex strip 61, two strings or ropes 10 respectively extend from the two reference points 20, overhanging ends of the two strings or ropes 10 are fixedly connected with a ring 90, a pen tip and the ring 90 form a clearance fit, and when the pen tip is inserted into the ring 90 to move, the extending lengths of the two strings or ropes 10 are driven to change, a tensioning unit 30, a measuring unit 40 and a processing unit 50 are disposed in the convex strip 61 and/or the positioning plate 60, the tensioning unit 30 is used for keeping the strings or ropes 10 extending from the reference points 20 in a stretched state, the measuring unit 40 is used for measuring the extending lengths of the strings or ropes 10 from the reference points 20, and the processing unit 50 calculates position information of the pen tip on the positioning plate 60 according to the extending lengths of the two strings or ropes 10 and the radius of the ring 90 and continuously calculates the position information When the coordinates are calculated through the lengths L1 and L2, the actual L1 is the sum of the L1 and the radius of the ring 90, and the actual L2 is the sum of the L2 and the radius of the ring 90. Through setting up line or rope 10, reference point 20, taut unit 30, measuring element 40, processing unit 50 and locating plate 60, according to the explanation before, can be convenient realize the collection of nib position, rethread processing unit 50's processing, can be convenient realize the record of nib handwriting. Because the pen is when writing, sometimes need to keep the writing, sometimes do not have this demand to nib itself is difficult to constitute fixed connection with line or rope 10, so set up ring 90 here, let line or rope 10 and ring 90 fixed connection, then insert the nib in ring 90, after setting up like this, can both be suitable for to different nibs, and the nib breaks down, can change at any time, does not influence the use of this notebook.
Generally, the convex strips 61 are arranged on the left side of the positioning plate 60, so that a user can write with the right hand conveniently; for some users who are used to write with the left hand, the convex strip 61 can be selected to be arranged on the right side of the positioning plate 60, so that writing is not affected.
When the notebook is used, only the pen point needs to be inserted into the circular ring 90 when notes are taken, so that the written handwriting can be automatically stored into an electronic version, the handwriting can be conveniently checked, shared and transmitted on a computer or a tablet personal computer or a mobile phone or other mobile terminals in the future, the whole synchronization process is automatic, manual operation is not needed, and the notebook is convenient to use.
Preferably, in order to ensure the accuracy of handwriting processing and eliminate unnecessary position interference, the pen further comprises a pressure detection unit 80 for detecting whether the pen tip is writing, and the processing unit 50 converts the position information of the pen tip during writing into electronic handwriting and discards the position information of the pen tip during non-writing. The specific structure of the pressure detecting unit 80 has been described in detail previously, and will not be described in detail here.
Referring to fig. 14, in order to ensure that the ring 90 can be well connected with the string or rope 10 when the pen tip writes at any position, in the present invention, preferably, the ring 90 includes a first ring 91 and a second ring 92 arranged along the axial direction of the ring 90, the first ring 91 is provided with an annular groove at the periphery, the second ring 92 is located in the annular groove, in order to illustrate the annular groove, the second ring 92 is cut off from the middle in fig. 14, in actual use, the second ring 92 is an integral annular structure, and the overhanging ends of the two strings or ropes 10 are respectively connected with the first ring 91 and the second ring 92. After the arrangement, the first ring 91 and the second ring 92 can rotate freely, so that the circle center of the first ring 91 is located on the extension line of the first line or the rope 10a, and the circle center of the second ring 92 is located on the extension line of the second line or the rope 10b, and therefore, the position can be calculated more accurately.
The structure of the protruding strip 61 is various, in the present embodiment, it is preferable that the cross section of the protruding strip 61 perpendicular to the surface direction of the positioning board 60 is an isosceles trapezoid, the bottom of the protruding strip 61 is aligned with one side of the positioning board 60, the top of the protruding strip 61 and the surface of the positioning board 60 form a first step surface 611, two through holes are arranged on the first step surface 611 to form two reference points 20, and the two through holes are symmetrically arranged about the center line of the isosceles trapezoid, so that after the arrangement, on one hand, the protruding strip 61 has certain aesthetic property, and on the other hand, the protruding strip 61 can also be used as a holding part for taking out a notebook. Be provided with the recess along its length direction on the first step surface 611, two lines or rope 10 and ring 90 accomodate in this recess when the nib does not insert in ring 90, set up after the recess, can conveniently accomodate, when need not fix a position, line or rope 10 and ring 90 can not influence yet and write, improve the travelling comfort of using.
Furthermore, the convex strip 61 is arranged on the left side of the positioning plate 60, a cover 62 is arranged on the right edge of the positioning plate 60, and the cover 62 and the positioning plate 60 form an open-close fit, so that the cover can play a role of protecting paper in the positioning plate 60 like the cover of a hard-shell notebook; the upside of locating plate 60 is provided with clamp plate 63, and clamp plate 63 passes through magnetic force and adsorbs the paper that is used for on the fixed centre gripping locating plate 60 on locating plate 60, and during general use, can get one or more paper and put on locating plate 60, then compress tightly with clamp plate 63, then can write in inserting ring 90 with the nib, can set up the bag of accomodating of storage paper on the front cover 62, and it is just more convenient to use like this.
The structures of the tensioning unit 30, the measuring unit 40, the processing unit 50, the pressure detecting unit 80 and the specific handwriting processing method in the notebook capable of storing handwriting have been described in detail in the previous section, and are not described herein again as long as the configuration is performed according to the previous scheme.
In a second usage scenario, referring to fig. 15, in the prior art, a capacitive pen is generally used for positioning on a screen, a pen point of the capacitive pen is relatively large, writing accuracy is not high enough, and writing accuracy and experience are not good enough, in order to improve writing accuracy and experience, a mobile phone or a tablet protective case with a writing function is provided herein, which includes a rectangular positioning plate 60, a groove is provided on the positioning plate 60 for accommodating the tablet or the mobile phone, the positioning plate 60 located on the left side or the right side of the groove forms a protruding strip 61, two reference points 20 are provided on the protruding strip 61, two wires or strings 10 respectively extend from the two reference points 20, overhanging ends of the two wires or strings 10 are connected with a pen tip of a simulation pen 70, the pen tip moves to drive the extending lengths of the two wires or strings 10 to change, the protruding strip 61 is hollow, and a tensioning unit 30, a measuring unit 40 and a processing unit 50 are provided in the protruding strip 61, the tensioning unit 30 is used for keeping the wires or strings 10 extending from the reference points 20 in a tensioned state, the measuring unit 40 is used for measuring the length of the line or rope 10 extending from the reference point 20, and the processing unit 50 calculates the position information of the pen point on the tablet or the mobile phone screen according to the extending lengths of the two lines or ropes 10 and outputs the position information to the tablet or the mobile phone.
It should be noted that, a groove is provided on the positioning plate 60 to accommodate a tablet or a mobile phone, or a protruding strip 61 is additionally provided on the side of the existing mobile phone or tablet shell, and the recessed portion in the middle of the existing mobile phone or tablet shell forms the groove. Because need hold cell-phone and flat board, reference point 20 can set up on the upper surface of sand grip 61, only need have seted up two through-holes at the upper surface interval of sand grip 61 can.
Through using this device, can be convenient write on cell-phone or dull and stereotyped screen, the nib of simulation pen 70 can set up very thin, and its material also can set up wantonly, like this, write precision and experience all very good. The use is very convenient.
Further, the analog pen 70 comprises a pen container 71 and a pen core 72, wherein the pen core 72 is made of a plastic material; the protruding strip 61 is provided with a first groove 612 for receiving the string or rope 10 and a second groove 613 for receiving the analog pen 70, the first groove 612 is a straight groove, two ends of the straight groove respectively extend to the positions of the two reference points 20, the second groove 613 is arranged in the middle of the first groove 612 and arranged in parallel, and a notch 614 is arranged at the center of the second groove 613 for a user to take the analog pen 70. The first groove 612 and the second groove 613 are arranged, so that the analog pen 70 and the string or rope 10 can be conveniently stored, and the analog pen 70 can be conveniently taken or put down through the notch 614.
The structures of the tension unit 30, the measurement unit 40, the processing unit 50, the pressure detection unit 80 and the specific pen tip position processing method in the mobile phone or tablet protection case with the writing function are described in detail in the previous sections, and are not described herein again as long as the arrangement is performed according to the previous scheme.
Claims (8)
1. A measuring system for measuring the length of a line or rope extension, characterized by: the device comprises a line or rope (10), a reference point (20), a tensioning unit (30) and a measuring unit (40), wherein the line or rope (10) extends out of the reference point (20), the tensioning unit (30) is used for keeping the line or rope (10) extending out of the reference point (20) in a stretched state, and the measuring unit (40) is used for measuring the length of the line or rope (10) extending out of the reference point (20);
the tensioning unit (30) comprises a winding wheel (31) and a coil spring (32), one end of the string or rope (10) is fixed on the winding wheel (31), and the direction for driving the winding wheel (31) to rotate when the string or rope (10) extends out is opposite to the rotation direction of the winding wheel (31) driven by the elastic acting force of the coil spring (32);
the measuring unit (40) comprises a direction detecting module (41), the direction detecting module (41) comprises a first partition plate (411), a second partition plate (412) and a driven sleeve (413), a line or rope (10) extending from the reel (31) sequentially penetrates through a through hole formed in the first partition plate (411) and a through hole formed in the second partition plate (412) and then extends out from a reference point (20), the driven sleeve (413) is sleeved on the line or rope (10) between the first partition plate (411) and the second partition plate (412), the inner diameter of the driven sleeve (413) is larger than the outer diameter of the line or rope (10), and therefore the line or rope (10) can drive the driven sleeve (413) to move together when moving, and the driven sleeve (413) can still move independently when being blocked by the first partition plate (411) or the second partition plate (412); two contacts are respectively arranged on the opposite surfaces of the first partition board (411) and the second partition board (412), the driven sleeve (413) is made of a conductive material, the two contacts on the first partition board (411) are conducted when the driven sleeve (413) abuts against the first partition board (411), the two contacts on the second partition board (412) are conducted when the driven sleeve (413) abuts against the second partition board (412), and the processing unit (50) judges the movement direction of the wire or rope (10) according to the conduction state of the contacts.
2. A measuring system for measuring the extension of a wire or rope according to claim 1, wherein: the height of two contacts on the first partition board (411) protruding out of the board surface of the first partition board (411) is the same, the height of two contacts on the second partition board (412) protruding out of the board surface of the second partition board (412) is the same, and the distance L4 between the contacts on the first partition board (411) and the contacts on the second partition board (412) and the length L5 of the driven sleeve (413) satisfy the following relation: L4-L5 is more than 0 and less than 2 mm.
3. A measuring system for measuring the extension of a wire or rope according to claim 1, wherein: the line or rope (10) comprises a transparent section (11) and a non-transparent shielding section (12) which are connected end to end, the transparent section (11) and the shielding section (12) are equal in length and are arranged at intervals, a photoelectric detection module (42) is arranged beside the line or rope (10) between the reel (31) and the reference point (20) and used for detecting the light transmittance of the line or rope (10), and the processing unit (50) calculates the extension length change value delta L of the line or rope (10) according to the change times k of the light transmittance and the length a of the transparent section (11).
4. A measuring system for measuring the protrusion length of a wire or rope according to claim 3, wherein: the measuring unit (40) comprises an installation seat (43), the section of the installation seat (43) along the length direction of the installation seat is E-shaped, a first through hole (431) is formed in a middle transverse plate of the installation seat (43) along the length direction of the installation seat (43) and used for a wire or a rope (10) to pass through, and the aperture of the first through hole (431) is consistent with the outer diameter of the wire or the rope (10); the middle transverse plate of the mounting seat (43) is further provided with a second through hole (432), the second through hole (432) is intersected with the first through hole (431) and perpendicular to the first through hole and the first through hole, the aperture of the second through hole (432) is smaller than or equal to that of the first through hole (431), the photoelectric detection module (42) comprises a light emitting tube (421) and a first photoresistor (422) which are respectively arranged in two grooves of the mounting seat (43), and light emitted by the light emitting tube (421) is incident on the first photoresistor (422) through the second through hole (432).
5. A measuring system for measuring the protrusion length of a wire or rope according to claim 4, wherein: the installation seat (43) on be provided with apron (45), apron (45) lid closes on the installation seat (43) side opening of "E" style of calligraphy, apron (45) all are provided with the turn-ups along installation seat (43) length direction's both ends and are used for the lid to close the both ends at installation seat (43), set up flutedly on the turn-ups of apron (45) and avoid apron (45) to cover when the time and line or rope (10) take place to interfere.
6. A measuring system for measuring the extension of a wire or rope according to claim 1, wherein: the measuring unit (40) comprises a driven wheel (44), the driven wheel (44) comprises a first driven wheel (441) and a second driven wheel (442), the shaft cores of the first driven wheel (441) and the second driven wheel (442) are overlapped and adjacently arranged along the shaft core direction, a line or rope (10) extending from the reel (31) winds around the first driven wheel (441) and then extends out from a reference point (20), a plurality of small holes are uniformly arranged at the peripheral edge of the second driven wheel (442) along the circumferential direction at intervals, a photoelectric detection module (42) is arranged beside each small hole and used for detecting the light transmittance of the second driven wheel (442), and the processing unit (50) is used for detecting the change times k of the light transmittance, the central angle theta of two adjacent small holes on the second driven wheel (442) and the radius r of the first driven wheel (441) calculate the extension length change value delta L of the wire or rope (10) to be (2 pi theta/180) · k-r.
7. A measuring system for measuring the protrusion length of a wire or rope according to claim 6, wherein: the measuring unit (40) comprises a mounting seat (43), the cross section of the mounting seat (43) along the length direction of the mounting seat is in a shape of Contraband, the peripheral area of a small hole formed in the second driven wheel (442) is located in a groove in a shape of Contraband, the photoelectric detection module (42) comprises a light emitting tube (421) and a second photosensitive resistor (84) which are respectively arranged on the inner wall of the groove of the mounting seat (43), and light emitted by the light emitting tube (421) is incident on the second photosensitive resistor (84) through the small hole in the second driven wheel (442).
8. A measuring system for measuring the protrusion length of a wire or rope according to claim 6, wherein: the line or rope (10) extending from the reel (31) surrounds the first driven wheel (441) for one to three circles and then extends from the reference point (20), and the outer contour of the first driven wheel (441) is circular or regular polygon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811320274.3A CN109375794B (en) | 2018-11-07 | 2018-11-07 | Measuring system for measuring the extension of a thread or rope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811320274.3A CN109375794B (en) | 2018-11-07 | 2018-11-07 | Measuring system for measuring the extension of a thread or rope |
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| CN109375794A CN109375794A (en) | 2019-02-22 |
| CN109375794B true CN109375794B (en) | 2021-12-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005506580A (en) * | 2001-10-19 | 2005-03-03 | シンボル テクノロジーズ インコーポレイテッド | Electro-optic assembly for image projection, especially in portable devices |
| CN1567166A (en) * | 2003-06-17 | 2005-01-19 | 范卫华 | Pen type cursor positioning device implementing handwriting input by line traction |
| CN2706799Y (en) * | 2003-08-19 | 2005-06-29 | 跳蛙企业股份有限公司 | Electric recording positioner |
| KR101188547B1 (en) * | 2004-05-11 | 2012-10-11 | 라자 머테리얼스 리미티드 | Colouring apparatus |
| JP5109171B2 (en) * | 2007-09-18 | 2012-12-26 | 株式会社ワコム | Position indicator, position input device, and computer system |
| US8194251B2 (en) * | 2010-08-26 | 2012-06-05 | Mitutoyo Corporation | Method for operating a dual beam chromatic point sensor system for simultaneously measuring two surface regions |
| CN103927024B (en) * | 2013-07-25 | 2016-08-17 | 沈阳工业大学 | A kind of command sets extension method based on nib Yu a body track in pen based user interface |
| JP2015087785A (en) * | 2013-10-28 | 2015-05-07 | 株式会社東芝 | Electronic apparatus and coordinate correction method |
| US10788862B2 (en) * | 2016-11-09 | 2020-09-29 | Shenzhen Royole Technologies Co., Ltd. | Flexible display device and unfolding detection method thereof |
| CN207991500U (en) * | 2018-04-23 | 2018-10-19 | 浙江凌志智能科技有限公司 | A kind of rope length degree induction mechanism |
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Effective date of registration: 20211201 Address after: 230088 3rd floor, G3 building, phase II, innovation industrial park, Wangjiang West Road, high tech Zone, Hefei City, Anhui Province Applicant after: Anhui Zhongju Intelligent Technology Co.,Ltd. Address before: 230088 station 1, block B, second floor, building E1, phase II, innovation industrial park, No. 2800, innovation Avenue, high tech Zone, Hefei, Anhui Province Applicant before: HEFEI HEDOU JIHUI TECHNOLOGY Co.,Ltd. |