CN202153164U - Differential type vertical micro force measuring apparatus - Google Patents
Differential type vertical micro force measuring apparatus Download PDFInfo
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- CN202153164U CN202153164U CN201120269424XU CN201120269424U CN202153164U CN 202153164 U CN202153164 U CN 202153164U CN 201120269424X U CN201120269424X U CN 201120269424XU CN 201120269424 U CN201120269424 U CN 201120269424U CN 202153164 U CN202153164 U CN 202153164U
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Abstract
The utility model discloses a differential type vertical micro force measuring apparatus, characterized in that the middle portion of a first stage lever horizontally arranged is provided with a first stage fulcrum, a pair of second stage levers are symmetrically arranged at both sides of the first stage fulcrum by using the first stage fulcrum as the center in a same vertical plane, the pair of second stage levers are respectively connected with the first stage lever through a first stage transition rod at respective side thereof, and the pair of second stage levers are respectively connected with a third stage lever through a second stage transmission rod at respective side thereof. The differential type vertical micro force measuring apparatus can provide support for the micro 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 the influence of flexible hinge distortion, lever centre of gravity place and variation of temperature to measurement and stated accuracy; Also there is not good solution; 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 the existing weak point of above-mentioned prior art, and a kind of the satisfy requirement of certain measuring accuracy and differential type vertical micro force measuring device 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 utility model differential type vertical micro force measuring device is: the middle part at the one-level lever of horizontal positioned is provided with the one-level fulcrum; With said one-level fulcrum is the center; In same perpendicular, a pair of second lever symmetry is divided the both sides that are in the one-level fulcrum, and in a side separately through one-level transiting rod and the connection of one-level lever; Said a pair of second lever also connects with three grades of levers of a side separately through the secondary transiting rod respectively mutually, wherein:
One end along continuous straight runs of said one-level lever forms free end through the extension, is the input end of measured little power F1 with said free end, and the restrain end of said one-level lever is connected the bottom of one-level transiting rod through the one-level flexible hinge at the bar sidepiece; The top of said one-level transiting rod is connected the inner sidepiece of bar of second lever through the secondary flexible hinge;
Said second lever is horizontal positioned, and the secondary fulcrum is positioned at the bar outer end sidepiece of second lever, and the bottom that three grades of flexible hinges are connected second lever the secondary transiting rod is set between bar the inner of said secondary fulcrum and second lever; The top of said secondary transiting rod is connected the bar outer end sidepiece of three grades of levers through the level Four flexible hinge;
Said three grades of levers are horizontal positioned; Three grades of lever bar the inners are output terminal, and said output terminal contacts with force transducer, and three grades of fulcrums are arranged on the middle part of three grades of levers; 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;
Middle part at said one-level transiting rod is provided with one-level transiting rod balancing weight through the one-level cantilever that connects firmly, and makes the center of gravity of one-level transiting rod adjust to place, one-level flexible hinge position; Restrain end at said one-level lever is provided with one-level lever balancing weight, and one-level lever and extension thereof, one-level transiting rod, one-level cantilever and the common center of gravity of one-level transiting rod balancing weight are adjusted on the position of one-level fulcrum; Middle part at said secondary transiting rod is provided with secondary transiting rod balancing weight through the secondary cantilever that connects firmly, and makes the center of gravity of secondary transiting rod adjust to place, three grades of flexible hinge positions; Bar outer end at 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 the position of secondary fulcrum; 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 utility model differential type vertical micro force measuring device also is:
At said one-level fulcrum, secondary fulcrum and place, three grades of fulcrum positions, one-level lever, two utmost point levers and three grades of levers are connected with pedestal through each supports flexible hinge respectively, and said each supports flexible hinge all is suspended on the pedestal, become consistent with gravity direction.
Compared with present technology, the utility model beneficial effect is embodied in:
1, the utility model method has been set up a kind of three grades of lever flexure hinge mechanisms based on flexible hinge and lever principle; The vertical micro power that can measure is amplified; Its simple in structure, easy processing and manufacturing, and Applications of Flexure Hinge reduced the friction link in the system, 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 that has counter weight construction; Second lever is adjusted to secondary fulcrum place with the common center of gravity of secondary transiting rod that has 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 supports 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 of three grades of fulcrums for moving up and down in the utility model along the long rails of setting; 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 differential type vertical micro force measuring device structural drawing in the utility model;
Fig. 2 is a balance-type type vertical micro force measuring device schematic diagram among the utility model embodiment;
Label among the figure: 1 one-level lever; 2 one-level fulcrums; 3 second levers; 4 three grades of levers; 5 one-level transiting rods; 6 secondary transiting rods; 7 input ends; 8 one-level flexible hinges; 9 secondary flexible hinges; 10 secondary fulcrums; 11 3 grades of flexible hinges; 12 level Four flexible hinges; 13 output terminals; 14 sensors; 15 3 grades of fulcrums; 16 tracks; 17 drive units; 18 second lever extensions; 1a one-level lever balancing weight; 3a second lever balancing weight; Three grades of lever balancing weights of 4a; 5a one-level cantilever; 5b one-level transiting rod balancing weight; 6a secondary cantilever; 6b secondary transiting rod balancing weight;
Embodiment
Referring to Fig. 1; Present embodiment is at the middle part of the one-level lever 1 of horizontal positioned one-level fulcrum 2 to be set, and is the center with one-level fulcrum 2, in same perpendicular; A pair of second lever 3 symmetries are divided the both sides that are in one-level fulcrum 2; And connect through one-level transiting rod 5 and one-level lever 1 in a side separately, a pair of second lever 3 also connects with three grades of levers 4 of a side separately through secondary transiting rod 6 respectively mutually, wherein:
Shown in Figure 1, an end along continuous straight runs of one-level lever 1 is 18 formation free ends 7 through the extension, are the input end of measured little power F1 with free end 7, and the restrain end of one-level lever 1 is connected the bottom of one-level transiting rod 5 through one-level flexible hinge 8 at the bar sidepiece; The top of one-level transiting rod 5 is connected the inner sidepiece of bar of second lever 3 through secondary flexible hinge 9;
Second lever 3 is horizontal positioned, and secondary fulcrum 10 is positioned at the bar outer end sidepiece of second lever, and the bottom that three grades of flexible hinges 11 are connected second lever 3 secondary transiting rod 6 is set between bar the inner of secondary fulcrum 10 and second lever 3; The top of secondary transiting rod 6 is connected the bar outer end sidepiece of three grades of levers 4 through level Four flexible hinge 12;
Three grades of levers 4 are horizontal positioned, and the inner of three grades of levers is an output terminal 13, and output terminal 13 contacts with force transducer 14, and three grades of fulcrums 15 are arranged on the middle part of three grades of levers 4.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 15 can be arranged in the long rails 16; And can in long rails 16, move up and down by drive unit 17 drivings; Can guarantee that like 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, improve enlargement factor and amplified precision; Make actual enlargement factor near theoretical enlargement factor, in the range of linearity, enlarged the range of measuring.
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 fulcrum 2 symmetrically.
Change the influence that each rod member is caused in order to eliminate center of gravity; Balancing weight can be set respectively on the relevant position; Comprise: the middle part at the one-level transiting rod is provided with one-level transiting rod balancing weight 5b through the one-level cantilever 5a that connects firmly, and makes the center of gravity of one-level transiting rod adjust to place, one-level flexible hinge position; Restrain end at one-level lever 1 is provided with one-level lever balancing weight 1a, and one-level lever 1 and extension 18 thereof, one-level transiting rod, one-level cantilever and the common center of gravity of one-level transition balancing weight are adjusted on the one-level position of the fulcrum; Middle part at secondary transiting rod 6 is provided with secondary transiting rod balancing weight 6b through the secondary cantilever 6a that connects firmly, and makes the center of gravity of secondary transiting rod 6 adjust to place, three grades of flexible hinge 11 positions; In the bar outer end of second lever second lever balancing weight 3a is set, makes second lever 3, secondary transiting rod 6, secondary cantilever 6a and the common center of gravity of secondary transiting rod balancing weight 6b adjust to place, secondary fulcrum 11 positions; At three grades of fulcrums 15 of three grades of levers 4 and the position between the output terminal 13 three grades of lever balancing weight 4a are set, make the center of gravity of three grades of levers 4 adjust to place, three grades of fulcrum 15 positions;
Change the influence that each rod member is caused in order to eliminate center of gravity, balancing weight also can be set to:
Middle part at one-level transiting rod 5 is provided with one-level transiting rod balancing weight 5b through the one-level cantilever 5a that connects firmly, and makes the center of gravity of one-level transiting rod 5 adjust to place, secondary flexible hinge 9 positions; Middle part at secondary transiting rod 6 is provided with secondary transiting rod balancing weight 6b through the secondary cantilever 6a that connects firmly, and makes the center of gravity of secondary transiting rod 6 adjust to place, three grades of flexible hinge 11 positions; Bar outer end at second lever 3 is provided with second lever balancing weight 3a, makes second lever 3, one-level transiting rod 5, one-level cantilever 5a, one-level transiting rod balancing weight 5b, secondary transiting rod 6, secondary cantilever 6a and the common center of gravity of secondary transiting rod balancing weight 6b adjust to the position of secondary fulcrum 11; One-level lever balancing weight 1a is set at the restrain end place of one-level lever 1, the center of gravity of one-level lever 1 and extension 18 thereof is adjusted on the position of one-level fulcrum 2; At three grades of fulcrums 15 of three grades of levers 4 and the position between the output terminal 13 three grades of lever balancing weight 4a are set, make the center of gravity of three grades of levers 4 adjust to place, three grades of fulcrum 15 positions;
Change the influence that each rod member is caused in order to eliminate center of gravity, balancing weight can also be set to:
Middle part at one-level transiting rod 5 is provided with one-level transiting rod balancing weight 5b through the one-level cantilever 5a that connects firmly, and makes the center of gravity of one-level transiting rod 5 adjust to place, secondary flexible hinge 9 positions; Bar outer end at second lever 3 is provided with second lever balancing weight 3a, makes second lever 3, one-level transiting rod 5, one-level cantilever 5a and the common center of gravity of one-level transiting rod balancing weight 5b adjust to the position of secondary fulcrum 11; Middle part at secondary transiting rod 6 is provided with secondary transiting rod balancing weight 6b through the secondary cantilever 6a that connects firmly, and makes the center of gravity of secondary transiting rod 6 adjust to place, level Four flexible hinge 12 positions; At three grades of fulcrums 15 of three grades of levers 4 and the position between the output terminal 13 three grades of lever balancing weight 4a are set, make three grades of levers 4, secondary transiting rod 6, secondary cantilever 6a and the common center of gravity of secondary transiting rod balancing weight 6b adjust to place, three grades of fulcrum 11 positions; One-level lever balancing weight 1a is set at the restrain end place of one-level lever 1, the center of gravity of one-level lever 1 and extension 18 thereof is adjusted on the position of one-level fulcrum 2;
In the practical implementation, can remove the balancing weight of transiting rods at different levels, but can reduce the force measurement precision and dwindle the force measurement scope.
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; Locate in one-level fulcrum 2, secondary fulcrum 11 and three grades of fulcrum 15 positions in the practical implementation; One-level lever 1, two utmost point levers 3 and three grades of levers 4 are connected with pedestal through each supports flexible hinge respectively, and each supports flexible hinge all is suspended on the pedestal, become consistent with gravity direction.
The measuring method of differential type vertical micro force measuring device is to realize variate by following mode in the present embodiment:
The power that input end loaded of definition one-level lever is 0 o'clock, and the position at each lever place is an initial position;
The little power F1 that needs the vertical direction of measurement in the input end loading of said 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 F1; Drive said a pair of three grades of fulcrums with drive unit and make accordingly along track and moving up and down, return to initial position, also return to corresponding initial position thereby make except that three grades of other levers at different levels and transition levers the lever until a pair of level Four flexible hinge; And the relative displacement of the output terminal of a pair of three grades of levers further strengthens; Relative displacement through pair of output produces is delivered to power on the force transducer, realizes force measurement.
Also can be in the practical implementation without drive unit 17, and directly three grades of fulcrums 15 are fixed on the support, can reduce the force measurement precision like this, and reduce the force measurement scope.
The utility model measurement mechanism can realize 10
-2Following micro-force measurement.
The utility model device also can use as balance by as shown in Figure 2; The restrain end of the one-level lever shown in Fig. 1 is set to as the identical form of free end, loads the gravity F of the object that will measure at input end, loads standard test weight G at the other end; Little power of measurement of output end is F1; According to direction and the size of little power F1, can obtain the power that will measure be F=F1+G or F=F1-G, thereby further obtain the quality of object.
Claims (2)
1. differential type vertical micro force measuring device; It is characterized in that one-level fulcrum (2) being set at the middle part of the one-level lever (1) of horizontal positioned; With said one-level fulcrum (2) is the center, and in same perpendicular, a pair of second lever (3) symmetry is divided the both sides that are in one-level fulcrum (2); And connect through one-level transiting rod (5) and one-level lever (1) in a side separately, said a pair of second lever (3) also connects with three grades of levers (4) of a side separately through secondary transiting rod (6) respectively mutually;
(18) form free end (7) to one end along continuous straight runs of said one-level lever (1) through the extension; With said free end (7) is the input end of measured little power F1, and the restrain end of said one-level lever (1) is connected the bottom of one-level transiting rod (5) through one-level flexible hinge (8) at the bar sidepiece; The top of said one-level transiting rod (5) is connected the inner sidepiece of bar of second lever (3) through secondary flexible hinge (9);
Said second lever (3) is horizontal positioned; Secondary fulcrum (10) is positioned at the bar outer end sidepiece of second lever (3), and the bottom that three grades of flexible hinges (11) are connected second lever (3) secondary transiting rod (6) is set between bar the inner of said secondary fulcrum (10) and second lever (3); The top of said secondary transiting rod (6) is connected the bar outer end sidepiece of three grades of levers (4) through level Four flexible hinge (12);
Said three grades of levers (4) are horizontal positioned; Bar the inner of three grades of levers (4) is output terminal (13); Said output terminal (13) contacts with force transducer (14); Three grades of fulcrums (15) are arranged on the middle part of three grades of levers (4), and said three grades of fulcrums (15) are arranged in long rails (16), and can in long rails (16), be moved up and down by drive unit (17) driving;
Middle part at said one-level transiting rod (5) is provided with one-level transiting rod balancing weight (5b) through the one-level cantilever (5a) that connects firmly, and makes the center of gravity of one-level transiting rod (5) adjust to place, one-level flexible hinge (8) position; Restrain end at said one-level lever (1) is provided with one-level lever balancing weight (1a), and one-level lever (1) and extension (18) thereof, one-level transiting rod (5), one-level cantilever (5a) and the common center of gravity of one-level transiting rod balancing weight (1b) are adjusted on the position of one-level fulcrum (2); Middle part at said secondary transiting rod (6) is provided with secondary transiting rod balancing weight (6b) through the secondary cantilever (6a) that connects firmly, and makes the center of gravity of secondary transiting rod (6) adjust to place, three grades of flexible hinges (11) position; Bar outer end at said second lever (3) is provided with second lever balancing weight (3a), makes said second lever (3), secondary transiting rod (6), secondary cantilever (6a) and the common center of gravity of secondary transiting rod balancing weight (6b) adjust to the position of secondary fulcrum (10); At three grades of fulcrums (15) of said three grades of levers (4) and the position between the output terminal (13) three grades of lever balancing weights (4a) are set, make the center of gravity of said three grades of levers (4) adjust to place, three grades of fulcrums (15) position.
2. differential type vertical micro force measuring device according to claim 1; It is characterized in that at said one-level fulcrum (2), secondary fulcrum (11) and place, three grades of fulcrums (15) position; One-level lever (1), two utmost point levers (3) are connected with pedestal through each supports flexible hinge respectively with three grades of levers (4); 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 |
|---|---|---|---|
| CN201120269424XU CN202153164U (en) | 2011-07-27 | 2011-07-27 | Differential type vertical micro force measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120269424XU CN202153164U (en) | 2011-07-27 | 2011-07-27 | Differential type vertical micro force measuring apparatus |
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| CN202153164U true CN202153164U (en) | 2012-02-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120269424XU Withdrawn - After Issue CN202153164U (en) | 2011-07-27 | 2011-07-27 | Differential type vertical micro force measuring apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288332A (en) * | 2011-07-27 | 2011-12-21 | 合肥工业大学 | Differential vertical micro force measuring device and measuring method thereof |
| CN103196598A (en) * | 2013-04-16 | 2013-07-10 | 北方工业大学 | Photoelectric type force sensor |
| CN103824601A (en) * | 2014-02-24 | 2014-05-28 | 中国科学院光电技术研究所 | Split type flexible hinge with stroke amplification function |
| CN103994849A (en) * | 2014-05-22 | 2014-08-20 | 北方工业大学 | Manufacturing method of high-sensitivity small photoelectric type force sensors |
| CN105259371A (en) * | 2015-10-19 | 2016-01-20 | 北京航天控制仪器研究所 | Novel inertia force amplification mechanism of silicon-micro resonant accelerometer |
-
2011
- 2011-07-27 CN CN201120269424XU patent/CN202153164U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288332A (en) * | 2011-07-27 | 2011-12-21 | 合肥工业大学 | Differential vertical micro force measuring device and measuring method thereof |
| CN103196598A (en) * | 2013-04-16 | 2013-07-10 | 北方工业大学 | Photoelectric type force sensor |
| CN103824601A (en) * | 2014-02-24 | 2014-05-28 | 中国科学院光电技术研究所 | Split type flexible hinge with stroke amplification function |
| CN103994849A (en) * | 2014-05-22 | 2014-08-20 | 北方工业大学 | Manufacturing method of high-sensitivity small photoelectric type force sensors |
| CN105259371A (en) * | 2015-10-19 | 2016-01-20 | 北京航天控制仪器研究所 | Novel inertia force amplification mechanism of silicon-micro resonant accelerometer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120229 Effective date of abandoning: 20130403 |
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| RGAV | Abandon patent right to avoid regrant |