CN202153169U - Differential type horizontal micro force measuring device - Google Patents
Differential type horizontal micro force measuring device Download PDFInfo
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- CN202153169U CN202153169U CN201120269382XU CN201120269382U CN202153169U CN 202153169 U CN202153169 U CN 202153169U CN 201120269382X U CN201120269382X U CN 201120269382XU CN 201120269382 U CN201120269382 U CN 201120269382U CN 202153169 U CN202153169 U CN 202153169U
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Abstract
The present utility model discloses a differential type horizontal micro force measuring device. The device is characterized in that a vertically arranged first grade lever is adopted as a central rod, two second grade levers are symmetrically and respectively arranged on the two sides of the first grade lever in the same vertical plane, the second grade levers are respectively connected with the first grade lever through first grade transitional rods of the two sides, and the second grade levers are also respectively connected with three grade levers of the two sides through the second grade transitional rods. The device is used for providing supports for a micro force value force-measuring system.
Description
Technical field
The utility model belongs to field of measuring technique, particularly a kind of micro-force measuring apparatus.
Background technology
Along with the appearance of development of modern science and technology and various new material, new product, the occasion that needs small power to measure is more and more.But the measuring system of little small value force is not also set up, up to the present, and 10
-5Measuring method little, that the ultra small value force of ox level of receiving can be traced to the source below the newton is not also set up, and therefore developing a kind of easy to use, cheap little power value metrology and measurement instrument just seems particularly important to measure the small power of various occasions.Micro-force measurement mainly contains pressure resistance type, condenser type, piezoelectric type etc. at present, and the pressure resistance type dynamometry is to utilize a kind of force measuring device of the piezoresistive effect preparation of pressure drag material, but this method receives Influence of Temperature easily; Condenser type receives the interference of electromagnetic field easily, and piezoelectric micro-cantilever beam formula dynamometry cost is low, but operation inconvenience and range are less.
Flexure hinge mechanism has obtained widespread use in fields such as precision measurement, demarcation at present; But about flexible hinge distortion, lever centre of gravity place and variation of temperature to measuring and the influence of stated accuracy still lacks comprehensive consideration and research; Do not see the structural design that effectively to eliminate gravity and temperature two aspect factor affecting as yet; And when little power is demarcated or measured,, must solve of the influence that demarcation or measurement caused of above several respects to little power in order to obtain higher precision; The influence that gravity and temperature produce possibly be far longer than the maximum range that little power is demarcated or measured, and little power demarcation or measurement are produced fatal influence.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, and a kind of the satisfy requirement of certain measuring accuracy and the horizontal micro-force measuring apparatus of differential type cheaply are provided, and is used for providing support for the dynamometric system of little small value force.
The utility model technical solution problem adopts following technical scheme:
The design feature of the horizontal micro-force measuring apparatus of the utility model differential type is that the one-level lever with vertical setting is a center-pole; In same perpendicular; A pair of second lever symmetry is divided the both sides that are in the one-level lever; And respectively through the one-level transiting rod and the connection of one-level lever of a side separately, said a pair of second lever is also respectively through secondary transiting rod and three grades of levers connections of a side separately;
Said one-level lever is a straight-bar, and the top of straight-bar is set to the one-level fulcrum, and the bottom of straight-bar is the free end as input end, is carried in the free end of straight-bar by micrometer power F1; The middle part of said one-level lever divides the inner of the one-level transiting rod that is in both sides to be connected through one-level flexible hinge and symmetry;
Said second lever is inverted " L " type bar that is made up of horizon bar and vertical bar; Vertically the bottom of bar is connected the outer end of one-level transiting rod through the secondary flexible hinge at the bar sidepiece; The secondary fulcrum is positioned at the rod end sidepiece of horizon bar; Between secondary fulcrum and vertical bar, three grades of flexible hinges are set the bottom of horizon bar with the secondary transiting rod is connected, the top of said secondary transiting rod is connected the outer end sidepiece of three grades of levers through the level Four flexible hinge;
Said three grades of levers are and are horizontally disposed with; The inner with at a pair of three grades of levers of symmetria bilateralis setting is an output terminal; Said output terminal contacts with force transducer; Three grades of fulcrums are arranged on the middle part of three grades of levers, and said three grades of fulcrums are arranged in long rails, and can in long rails, be moved up and down by the drive unit driving;
Connect firmly a pair of connecting rod that one side is extended towards the inner place of transiting rod in the outer end of said one-level transiting rod, connect firmly one-level transiting rod balancing weight, make the center of gravity of one-level transiting rod adjust to place, one-level flexible hinge position at the rod end of said connecting rod; On said one-level lever; Position between one-level fulcrum and one-level flexible hinge is provided with one-level lever balancing weight through a pair of one-level cantilever that connects firmly, and one-level lever, one-level transiting rod, connecting rod and the common center of gravity of one-level transiting rod balancing weight are adjusted on the position of one-level fulcrum; Connect firmly a pair of secondary cantilever at the middle part of said secondary transiting rod, secondary transiting rod balancing weight is set, make the center of gravity of secondary transiting rod adjust to place, three grades of flexible hinge positions at the arm end of secondary cantilever; Rod end at the horizon bar of said second lever is provided with the second lever balancing weight, makes said second lever, secondary transiting rod, secondary cantilever and the common center of gravity of secondary transiting rod balancing weight adjust to place, secondary fulcrum position; At three grades of fulcrums of said three grades of levers and the position between the output terminal three grades of lever balancing weights are set, make the center of gravity of said three grades of levers adjust to place, three grades of fulcrum positions.
The design feature of the horizontal micro-force measuring apparatus of the utility model differential type also is:
At said one-level fulcrum, secondary fulcrum and place, three grades of fulcrum positions; The horizon bar of one-level lever, two utmost point levers and three utmost point levers are connected with pedestal through each supports flexible hinge respectively; Said each supports flexible hinge all is suspended on the pedestal, becomes consistent with gravity direction.
Compared with present technology, the utility model beneficial effect is embodied in:
1, the utility model has been set up a kind of three grades of lever flexure hinge mechanisms based on flexible hinge and lever principle; The little power of the level that will measure is amplified; Simple, the processing and manufacturing easily of the utility model mechanism structure; And Applications of Flexure Hinge has reduced the friction link in the system, has improved measuring accuracy.
2, three grades of lever flexure hinge mechanisms in the utility model adopt the method for gravitational equilibrium; For levers at different levels are provided with counterweight; Make the center of gravity of one-level transiting rod adjust to one-level flexible hinge place, the center of gravity of secondary transiting rod is adjusted to three grades of flexible hinge places, and the one-level lever is adjusted to one-level fulcrum place with the common center of gravity of one-level transiting rod with counter weight construction; Second lever is adjusted to secondary fulcrum place with the common center of gravity of secondary transiting rod with counter weight construction; The center of gravity of three grades of levers is adjusted to three grades of fulcrum places, and having eliminated center of gravity, to change influence and anti-interference factor that each rod member caused stronger, makes the result of micro-force measurement more accurate.
3, the utility model adopts symmetrical mechanism, has eliminated the influence of the lever distortion that temperature causes, and is beneficial to the raising of measuring accuracy.
4, the flexible hinge at the utility model one-level fulcrum, secondary fulcrum and three grades of fulcrum places all adopts and becomes consistent setting with gravity direction; Flexural deformation and bending stress that gravity causes flexible hinge have been eliminated; Otherwise, the destruction that the moment of flexure that gravity produces can cause flexible hinge.
5, the fulcrum that three grades of fulcrums move up and down for track longitudinally in the utility model; Can guarantee that one-level lever, second lever, one-level transiting rod and secondary transiting rod keep motionless at initial position when final realizable force is measured, make the distortion at flexible hinge place minimum; And reduced the strain energy loss on the flexible hinge; Improved enlargement factor and amplified precision, made actual enlargement factor, in the range of linearity, enlarged the range of measuring near theoretical enlargement factor.
Description of drawings
Fig. 1 is a horizontal micro-force measuring apparatus schematic diagram in the utility model;
Fig. 2 is a counter weight construction synoptic diagram on the one-level transiting rod in the utility model;
Label among the figure: 1 one-level lever; 2 one-level fulcrums; 3 free ends; 4 one-level transiting rods; 5 one-level flexible hinges; 6 horizon bars; 7 vertical bars; 8 secondary flexible hinges; 9 secondary fulcrums; 10 3 grades of flexible hinges; 11 secondary transiting rods; 12 level Four flexible hinges; 13 3 grades of levers; 14 output terminals; 15 sensors; 16 3 grades of fulcrums; 17 long rails; 18 drive units; Three grades of transiting rod balancing weights of 13a; 1a one-level cantilever; 1b one-level lever balancing weight; The 4a connecting rod; 4b one-level transiting rod balancing weight; 11a secondary cantilever; 11b secondary transiting rod balancing weight.
Embodiment
Referring to Fig. 1, Fig. 2; The horizontal micro-force measuring apparatus of present embodiment differential type is that the one-level lever 1 with vertical setting is a center-pole; In same perpendicular; A pair of second lever symmetry is divided the both sides that are in one-level lever 1, and passes through the one-level transiting rod 4 and second lever 1 connection of a side separately respectively, and a pair of second lever is also respectively through secondary transiting rod 11 and three grades of levers, 13 connections of a side separately;
One-level lever 1 is a straight-bar, and the top of straight-bar is an one-level fulcrum 2, and the bottom of straight-bar is the free end 3 as input end, is carried in the free end 3 of straight-bar by micrometer power F1; The middle part of one-level lever 1 divides the inner of the one-level transiting rod 4 that is in both sides to be connected through one-level flexible hinge 5 and symmetry;
Second lever is inverted " L " type bar that is made up of horizon bar 6 and vertical bar 7; Vertically the bottom of bar 7 is connected the outer end of one-level transiting rod 4 through secondary flexible hinge 8 at the bar sidepiece; Secondary fulcrum 9 is positioned at the rod end sidepiece of horizon bar 6; Between secondary fulcrum 9 and vertical bar 7, three grades of flexible hinges 10 are set the bottom of horizon bar 6 with secondary transiting rod 11 is connected, the top of secondary transiting rod 11 is connected the outer end sidepiece of three grades of levers 13 through level Four flexible hinge 12;
Three grades of levers 13 are horizontal positioned, are output terminal 14 with the inner at a pair of three grades of levers 13 of symmetria bilateralis setting, and output terminal 14 contacts with force transducer 15, and three grades of fulcrums 16 are arranged on the middle part of three grades of levers 13.For when carrying out micro-force measurement; Make the distortion at flexible hinge place minimum, reduce the strain energy loss on the flexible hinge, three grades of fulcrums 16 are arranged in the long rails 17; And can in long rails 17, move up and down by drive unit 18 drivings; Guarantee that with this when final realizable force was measured, one-level lever, second lever, one-level transiting rod and secondary transiting rod kept motionless at initial position, further improve enlargement factor and amplify precision; Make actual enlargement factor near theoretical enlargement factor, in the range of linearity, enlarge and measure range.
In order to eliminate Influence of Temperature, two second levers, two three grades of levers, two one-level transiting rods and two secondary transiting rods are distributed in the both sides of one-level lever 1 symmetrically.
Change the influence that each rod member is caused in order to eliminate center of gravity, being provided with of balancing weight can be undertaken by following mode:
Connect firmly a pair of connecting rod 4a that one side is extended towards the inner place of transiting rod in the outer end of one-level transiting rod 4, connect firmly one-level transiting rod balancing weight 4b, make the center of gravity of one-level transiting rod 4 adjust to place, one-level flexible hinge 5 positions at the rod end of connecting rod 4a; On one-level lever 1; Position between one-level fulcrum 2 and one-level flexible hinge 5 is provided with one-level lever balancing weight 1b through a pair of one-level cantilever 1a that connects firmly, and one-level lever 1, one-level transiting rod 4, connecting rod 4a and the common center of gravity of one-level transiting rod balancing weight 4b are adjusted on the position of one-level fulcrum 2; Connect firmly a pair of secondary cantilever 11a at the middle part of secondary transiting rod 11, secondary transiting rod balancing weight 11b is set, make the center of gravity of secondary transiting rod 11 adjust to place, three grades of flexible hinge 10 positions at the arm end of secondary cantilever 11a; Rod end at the horizon bar 6 of second lever is provided with second lever balancing weight 6a, make second lever, secondary transiting rod, secondary cantilever 11a, and the common center of gravity of secondary transiting rod balancing weight 11b adjust to place, secondary fulcrum 9 positions; At three grades of fulcrums 16 of three grades of levers and the position between the output terminal 14 three grades of lever balancing weight 13a are set, make the center of gravity of three grades of levers 13 adjust to place, three grades of fulcrum 16 positions.
Change the influence that each rod member is caused in order to eliminate center of gravity; The setting of balancing weight also can be undertaken by following mode: on one-level lever 1; Position between one-level fulcrum 2 and one-level flexible hinge 5 is provided with one-level lever balancing weight 1b through a pair of one-level cantilever 1a that connects firmly, and the center of gravity of one-level lever 1 is adjusted on the position of one-level fulcrum 2; Connect firmly pair of links 4a in the outer end of one-level transiting rod 4, connect firmly one-level transiting rod balancing weight 4b, make the center of gravity of one-level transiting rod adjust to place, secondary flexible hinge 8 positions at the rod end of connecting rod 4a; Connect firmly a pair of secondary cantilever 11a at the middle part of secondary transiting rod 11, secondary transiting rod balancing weight 11b is set, make the center of gravity of secondary transiting rod 11 adjust to place, three grades of flexible hinge 10 positions at the arm end of secondary cantilever 11a; Rod end place at the horizon bar 6 of second lever is provided with second lever balancing weight 6a; Make second lever, connecting rod 4a; One-level transiting rod balancing weight 4b, one-level transiting rod 4, secondary cantilever 11a, secondary transiting rod balancing weight 11b and secondary transiting rod 11 common centers of gravity are adjusted to place, secondary fulcrum 9 positions; At three grades of fulcrums 16 of three grades of levers and the position between the output terminal 14 three grades of lever balancing weight 13a are set, make the center of gravity of three grades of levers adjust to place, three grades of fulcrum positions.
Change the influence that each rod member is caused in order to eliminate center of gravity, being provided with of balancing weight can also be undertaken by following mode:
On one-level lever 1, the position between one-level fulcrum 2 and one-level flexible hinge 5 is provided with one-level lever balancing weight 1b through a pair of one-level cantilever 1a that connects firmly, and the center of gravity of one-level lever 1 is adjusted on the position of one-level fulcrum 2; Connect firmly pair of links 4a in the outer end of one-level transiting rod 4, connect firmly one-level transiting rod balancing weight 4b, make the center of gravity of one-level transiting rod adjust to place, secondary flexible hinge 8 positions at the rod end of connecting rod 4a; Rod end place at the horizon bar of second lever is provided with second lever balancing weight 6a, makes second lever, connecting rod 4a, one-level transiting rod balancing weight 4b, and one-level transiting rod 4 common centers of gravity are adjusted to place, secondary fulcrum 9 positions; Connect firmly a pair of secondary cantilever 11a at the middle part of secondary transiting rod, secondary transiting rod balancing weight 11b is set, make the center of gravity of secondary transiting rod adjust to place, level Four flexible hinge 12 positions at the arm end of secondary cantilever 11a; At three grades of fulcrums 16 of three grades of levers and the position between the output terminal 14 three grades of lever balancing weight 13a are set, make three grades of levers, secondary cantilever 11a, secondary transiting rod balancing weight 11b and secondary transiting rod 11 common centers of gravity adjust to place, three grades of fulcrum 16 positions.
In the practical implementation, also can remove the balancing weight of transiting rods at different levels, but can reduce the force measurement precision and reduce the force measurement scope.
At one-level fulcrum 2, secondary fulcrum 9 and place, three grades of fulcrum 16 positions; The horizon bar 6 of one-level lever 1, two utmost point levers and three utmost point levers 13 are connected with pedestal through each supports flexible hinge respectively; In order to eliminate flexural deformation and the bending stress that gravity causes flexible hinge; The destruction that the moment of flexure of avoiding gravity to produce causes flexible hinge, the flexible hinge at one-level fulcrum, secondary fulcrum and three grades of fulcrum places are all adopted with gravity direction and are become consistent setting.
Present embodiment is realized the variate of the little power of level by following mode:
The power that input end loaded of definition one-level lever is 0 o'clock, and the position at one-level lever, second lever and three grades of lever places is an initial position;
Load little power F1 of tested horizontal direction at the input end of one-level lever; Each rod member produces skew, and wherein a pair of three grades of levers produce opposite inclination around three grades of fulcrums separately, in the opposite displacement of output terminal generation of a pair of three grades of levers; Size and Orientation according to measured little power; Drive unit drive a pair of three grades of fulcrums longitudinally track vertically move accordingly, return to initial position until a pair of level Four flexible hinge, also return to corresponding initial position thereby make except that three grades of other levers at different levels and transition levers the lever; The relative displacement that output terminal through a pair of three grades of levers produces is delivered to power on the force transducer, realizes force measurement.
Also drive unit 18 can be set in the practical implementation, but directly three grades of fulcrums 16 be fixed on the support, this can reduce the force measurement precision equally, and reduces the force measurement scope.
The utility model measurement mechanism can realize 10
-2Following little force measurement.
Claims (2)
1. horizontal micro-force measuring apparatus of differential type; It is characterized in that the one-level lever (1) with vertical setting is a center-pole; In same perpendicular; A pair of second lever symmetry is divided the both sides that are in one-level lever (1), and passes through the one-level transiting rod (4) and one-level lever (1) connection of a side separately respectively, and said a pair of second lever is also respectively through secondary transiting rod (11) and three grades of levers (13) connection of a side separately;
Said one-level lever (1) is a straight-bar, and the top of straight-bar is set to one-level fulcrum (2), and the bottom of straight-bar is the free end (3) as input end, is carried in the free end (3) of straight-bar by micrometer power F1; The middle part of said one-level lever (1) divides the inner of the one-level transiting rod (4) that is in both sides to be connected through one-level flexible hinge (5) and symmetry;
Said second lever is inverted " L " type bar that is made up of horizon bar (6) and vertical bar (7); Vertically the bottom of bar (7) is connected the outer end of one-level transiting rod (4) through secondary flexible hinge (8) at the bar sidepiece; Secondary fulcrum (9) is positioned at the rod end sidepiece of horizon bar (6); Between secondary fulcrum (9) and vertical bar (7), three grades of flexible hinges (10) are set the bottom of horizon bar (6) with secondary transiting rod (11) is connected, the top of said secondary transiting rod (11) is connected the outer end sidepiece of three grades of levers (13) through level Four flexible hinge (12);
Said three grades of levers (13) are and are horizontally disposed with; The inner with a pair of three grades of levers (13) of being provided with in symmetria bilateralis is output terminal (14); Said output terminal (14) contacts with force transducer (15); Three grades of fulcrums (16) are arranged on the middle part of three grades of levers (13), and said three grades of fulcrums (16) are arranged in long rails (17), and can in long rails (17), be moved up and down by drive unit (18) driving;
Connect firmly a pair of connecting rod (4a) that one side is extended towards the inner place of transiting rod in the outer end of said one-level transiting rod (4); Rod end at said connecting rod (4a) connects firmly one-level transiting rod balancing weight (4b), makes the center of gravity of one-level transiting rod (4) adjust to place, one-level flexible hinge (5) position; On said one-level lever (1); The position that is positioned between one-level fulcrum (2) and the one-level flexible hinge (5) is provided with one-level lever balancing weight (1b) through a pair of one-level cantilever (1a) that connects firmly, and one-level lever (1), one-level transiting rod (4), connecting rod (4a) and the common center of gravity of one-level transiting rod balancing weight (4b) are adjusted on the position of one-level fulcrum (2); Connect firmly a pair of secondary cantilever (11a) at the middle part of said secondary transiting rod (11), secondary transiting rod balancing weight (11b) is set, make the center of gravity of secondary transiting rod (11) adjust to place, three grades of flexible hinges (10) position at the arm end of secondary cantilever (11a); Rod end at the horizon bar (6) of said second lever is provided with second lever balancing weight (6a), makes said second lever, secondary transiting rod (11), secondary cantilever (11a) and the common center of gravity of secondary transiting rod balancing weight (11b) adjust to place, secondary fulcrum (9) position; At three grades of fulcrums (16) of said three grades of levers (13) and the position between the output terminal (14) three grades of lever balancing weights (13a) are set, make the center of gravity of said three grades of levers (13) adjust to place, three grades of fulcrums (16) position.
2. according to the horizontal micro-force measuring apparatus of the said differential type of claim 1; It is characterized in that at said one-level fulcrum (2), secondary fulcrum (9) and place, three grades of fulcrums (16) position; The horizon bar (6) of one-level lever (1), two utmost point levers and three utmost point levers (13) are connected with pedestal through each supports flexible hinge respectively; Said each supports flexible hinge all is suspended on the pedestal, becomes consistent with gravity direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120269382XU CN202153169U (en) | 2011-07-27 | 2011-07-27 | Differential type horizontal micro force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120269382XU CN202153169U (en) | 2011-07-27 | 2011-07-27 | Differential type horizontal micro force measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202153169U true CN202153169U (en) | 2012-02-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120269382XU Withdrawn - After Issue CN202153169U (en) | 2011-07-27 | 2011-07-27 | Differential type horizontal micro force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202153169U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359843A (en) * | 2011-07-27 | 2012-02-22 | 合肥工业大学 | Differential type horizontal micro-force measuring device and measuring method thereof |
| CN105890824A (en) * | 2014-10-22 | 2016-08-24 | 中国石油大学(北京) | Method for measuring wind load of tiny floating object |
-
2011
- 2011-07-27 CN CN201120269382XU patent/CN202153169U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359843A (en) * | 2011-07-27 | 2012-02-22 | 合肥工业大学 | Differential type horizontal micro-force measuring device and measuring method thereof |
| CN102359843B (en) * | 2011-07-27 | 2013-01-09 | 合肥工业大学 | Differential type horizontal micro-force measuring device and measuring method thereof |
| CN105890824A (en) * | 2014-10-22 | 2016-08-24 | 中国石油大学(北京) | Method for measuring wind load of tiny floating object |
| CN105890824B (en) * | 2014-10-22 | 2018-08-24 | 中国石油大学(北京) | A kind of small floating material wind load measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120229 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |