CN202442841U - Dynamic force calibrating structure - Google Patents
Dynamic force calibrating structure Download PDFInfo
- Publication number
- CN202442841U CN202442841U CN2012200353264U CN201220035326U CN202442841U CN 202442841 U CN202442841 U CN 202442841U CN 2012200353264 U CN2012200353264 U CN 2012200353264U CN 201220035326 U CN201220035326 U CN 201220035326U CN 202442841 U CN202442841 U CN 202442841U
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- dynamic force
- hoisting frame
- calibration
- mounting disc
- guide rod
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Abstract
The utility model discloses a dynamic force calibrating structure. The dynamic force calibrating structure comprises a large-mass base (1) placed on a horizontal basal plane, a vertical guide rod (2) fixed on the base (1), a lifting mechanism (4) for driving a lifting frame (3) to move along the guide rod (2), a brake device (5) for locking the lifting frame (3) at the selected position of the guide rod (2), an installing disc (7) fixedly installed on the lifting frame (3) and a fixed standard mass block (6) suspended under the lifting frame (3). The fixed standard mass block (6) is fixedly connected with the installing disc (7) through a through hole on the lifting frame (3), and an automatic centering mechanism is further arranged on the installing disc (7). A structure of a dynamic force calibrating device is modified, and the automatic centering performance of a conical surface is adopted, and the problems including limited measuring range, poor consistency and low precision by means of a traditional installing mode are solved. In addition, the dynamic force calibrating structure is simple, convenient to operate and low in cost.
Description
Technical field
The utility model relates to a kind of dynamic perfromance caliberating device in measurement and the field of sensing technologies, relates in particular to a kind of dynamic perfromance caliberating device of force transducer.
Background technology
The dynamic force caliberating device is mainly used in the dynamic property of force transducer and demarcates.Acceleration transducer and force transducer are two kinds of the most frequently used in vibration test sensors.When sensor dispatched from the factory, manufacturer should provide the sensitivity number and the frequency characteristic parameter thereof of sensor.The medium-high frequency performance of acceleration transducer is fine, and its sensitivity generally remains unchanged in the 10---5000Hz scope.At present, for force transducer, manufacturer only provides linearity figure (static demarcating) and the Sensitirity va1ue in its range ability usually, and its dynamic force performance data is not provided.But in vibration experiment, force transducer works in certain frequency band range, and therefore, the user must know the dynamic force characteristic of force transducer, and the static demarcating result that producer provides can't satisfy the needs of kinetic measurement.Owing to the influence of environment for use, improper, overload and transportation are installed and store the change that improper meeting causes the force transducer characteristic, the sensibility in practice of force transducer and its nominal value generation difference.In kinetic measurement, the measuring error of force transducer is the several times of acceleration transducer normally, and for guaranteeing measuring accuracy, it is necessary that force transducer is carried out dynamic calibration.At present, in the vibration signal field tests, modal is the calibration system of acceleration transducer, and the dynamic calibration system of force transducer is more rare.Because the absolute magnitude of acceleration can comparatively accurately and easily measure through laser vibration measurer or acceleration of gravity; The absolute magnitude that directly obtains power is then very difficult; So the dynamic property of force transducer is demarcated normally through measuring acceleration for the basis, utilizes Newton second law to carry out indirectly again.
Existing dynamic force caliberating device uses vibrator as power source usually; The standard quality piece is fixed or rope hanging through screw thread; Promptly the standard quality piece is directly used restraint, utilize vibrator that the standard quality piece is applied exciting force, obtain by the dynamic characteristic parameter of calibration sensor.This dynamic force calibration structure is simple, but screw fixation method is generally limited to the dynamic calibration of little range sensors; And the rope hanging mode is because the waving of cotton rope, and its consistance extreme difference, repeatable accuracy are low, and because the standard quality piece is tied, the precision as a result of demarcation is lower, and error is bigger.
Summary of the invention
The purpose of the utility model is to propose a kind of dynamic force calibration structure, with the manufacturing cost and use cost of minimum make the force transducer dynamic perfromance demarcate more precisely, more reliable, thereby overcome deficiency of the prior art.
For realizing above-mentioned utility model purpose, the utility model has adopted following technical scheme:
A kind of dynamic force calibration structure is characterized in that it comprises:
Be placed in the big quality base on the horizontal basal plane,
Be fixed on the vertical guide rod on the said base,
Be used to drive the hoisting gear that hoisting frame moves along guide rod,
Be used for hoisting frame is locked in the clamping device of the select location on the guide rod,
Be fixedly mounted on the mounting disc on the hoisting frame,
And, be suspended at the accurate mass of calibration of hoisting frame below;
The through hole of the accurate mass of said calibration on hoisting frame is fixedly connected with mounting disc, and said change standard quality piece can superpose as required and be fixed in the mounting disc, and also is provided with automatic centering mechanism in the said mounting disc.
As a kind of preferred version, said hoisting frame is provided with the pilot hole that cooperates with guide rod.
Further, said guide rod is two, and it is symmetricly set in the hoisting frame both sides, certainly, also can adopt asymmetrical structure according to actual needs.
Preferably, the accurate mass of said calibration passes the manhole of offering at the hoisting frame center and is fixedly connected with mounting disc.
The accurate mass of said calibration can preferably adopt flanged (FLGD) right cylinder, and the flange end processes bulb, but is not limited thereto kind of a form.
The accurate mass whole height of said calibration is greater than the hoisting frame height, and the accurate mass of said calibration upper end is fixedly connected with mounting disc.
Said clamping device is fixedly connected with hoisting frame, and perhaps particularly preferred, said clamping device is located at hoisting frame inside.
Said automatic centering structure can be preferably cone structure for being arranged at circular seam, sphere or the cone structure on the mounting disc lower surface, and said automatic centering structure and hoisting frame, mounting disc and the coaxial setting of standard quality piece.
Said mounting disc can be made into the cake formula, also can be made into ring type, and is preferred, processes ring type.
Said hoisting gear is fixed on the big quality base, can select various ways for use, drive like motor-driven, air pressure driving, hydraulic-driven etc., and type of belt drive such as chain transmission, the transmission of the screw thread width of cloth etc., preferred, select the direct transmission of hydraulic-driven for use.
Preferably, said dynamic force calibration structure also comprises the stackable change standard quality piece that is fixed in the mounting disc, and is more preferred, and said change standard quality piece can be through the helicitic texture fixed overlay in mounting disc.
The utility model at first is fixed on big quality base on the horizontal terrace when using, and force transducer to be calibrated and proof force sensor are installed on the big quality base simultaneously; Calibrate accurate mass and pass the center hole on the hoisting frame, be connected with mounting disc, the conical surface in the mounting disc contacts with the center hole sideline of hoisting frame; Can make the standard quality piece coaxial with the hoisting frame center; Hoisting gear with hoisting frame and on standard quality piece (contain the accurate mass of calibration and become the standard quality piece), mounting disc rise to setting height simultaneously, start clamping device, hoisting frames etc. rest on setting height; After the system that treats is ready; Guide rod slides in the action of gravity lower edge for releasing braking device, hoisting frame etc., and force transducer to be calibrated and the proof force sensor calibrated on accurate mass and the big quality base clash into; The signal that force transducer to be calibrated and proof force sensor will record respectively separately is transferred in the data analysis system, accomplishes one time rating test.
Certainly; As another kind of embodiment; Also can use standard acceler as standard, be installed on the standard quality piece, only need the quality of record standard mass and acceleration that standard acceler obtains to multiply each other during rating test; Be F=ma, the result gets final product as the calibrating parameters of force transducer to be calibrated.
Compared with prior art, the advantage of the utility model is: the structure through to the dynamic force caliberating device improves, and adopts the performance of conical surface automatic centering; Solved the problem that conventional mounting mode range is limited, consistance is poor, precision is low, simultaneously, the dynamic force caliberating device range of design formation is wide by this; Good reproducibility, precision is high, and is simple in structure; Easy to operate, with low cost.
Description of drawings
Fig. 1 is a structural representation of using the dynamic force caliberating device that does not have the suspension mounting means in the prior art;
Fig. 2 is a structural representation of using a kind of dynamic force caliberating device of suspension mounting means in the prior art;
Fig. 3 is a structural representation of using another dynamic force caliberating device of suspension mounting means in the prior art;
Fig. 4 is the structural representation of dynamic force caliberating device in the utility model one preferred embodiment;
Fig. 5 is the application state synoptic diagram of dynamic force caliberating device in the utility model one preferred embodiment;
More than assembly and Reference numeral thereof shown in each figure be respectively: 1, big quality base; 2, guide rod; 3, hoisting frame; 4, hoisting gear; 5, clamping device; 6, calibrate accurate mass; 7, mounting disc; 8, become the standard quality piece; 9, standard acceler; 10, force transducer to be calibrated; 11, impact block; 12, support; 13, vibrator; 14, fine rule rope; 15, impact damper.
Embodiment
Be described further below in conjunction with accompanying drawing and a preferred embodiment technical scheme the utility model.
Consult Fig. 4; Dynamic force calibration structure in this preferred embodiment comprises fixing big quality base 1, guide rod 2, hoisting frame 3, hoisting gear 4, clamping device 5, the accurate mass 6 of calibration and mounting disc 7, and this big quality base 1 is placed on the terrace of level, and guide rod 2 is fixed on the base with hoisting gear 4; Pilot hole is set on the hoisting frame 3 to be cooperated with guide rod 2; Clamping device 5 links to each other with hoisting frame 3, opens circular hole on the hoisting frame 3, calibrates accurate mass 6 and is connected with mounting disc 7 through the circular hole on the hoisting frame 3 with change standard quality piece 8; Automatic centering mechanism is set in the mounting disc 7, becomes the weight quality of the quantity change rating test of standard quality piece 8 through adjustment.Timing signal is fixed on standard acceler 9 on accurate mass 6 of calibration or the change standard quality piece 8, and force transducer 10 to be calibrated is fixed on the big quality base 1, and places under the accurate mass 6 of calibration.By Newton second law F=ma; Only need test acceleration a that standard acceler 9 will be recorded and the quality m that tests weight to multiply each other; The result who obtains (being the dynamic force that force transducer 10 to be calibrated is born) contrasts with the force signal that force transducer 10 to be calibrated self records; To confirm the dynamic characteristic parameter of force transducer 10 to be calibrated, the dynamic force that reaches force transducer is demarcated purpose.Wherein m is accurate mass 6 of calibration and the quality sum that becomes standard quality piece 8.
Consult Fig. 5, this preferred embodiment is fixed on force transducer 10 to be calibrated on the big quality base 1 when using; Guide rod 2 is fixing by the support 12 that is installed on the big quality base 1, improves the bearing accuracy of guide rod 2, simultaneously; On the big quality base 1 special impact damper 15 is installed; Buffering is provided when hoisting frame 3 drops to the bottom, for hoisting frame 3, prevents that hoisting frame 3 and standard quality piece 6 from secondary impact taking place, and influences stated accuracy.During rating test, hoisting frame 3 grades are risen to setting height, start the built-in clamping device 5 of hoisting frame 3 by hoisting gear 4; Make hoisting frame 3, the accurate mass of calibration 6, mounting disc 7, become standard quality piece 8 and standard acceler 9 reliably rests on this position, treat that other positions of system are ready, releasing braking device 5; Hoisting frame 3 grades glide along guide rod 2 under action of gravity, because the accurate mass of calibration 6 bottoms exceed hoisting frame 3 lower surfaces; Calibrate force transducer to be calibrated 10 collisions on accurate mass 6 and the big quality base 1; At this moment, hoisting frame 3 continues to descend, and with before the accurate mass 6 of calibration contacts is not being cushioned by the impact damper on the big quality base 1 15; And brake once more by its built-in clamping device 5, accomplish one time rating test.
Above preferred embodiment only supplies to explain the usefulness of the utility model; But not to the restriction of the utility model, the technician in relevant technologies field is under the situation of spirit that does not break away from the utility model and scope; Do various conversion or modification, all belonged to the category of the utility model.
Claims (10)
1. dynamic force calibration structure is characterized in that it comprises:
Be placed in the big quality base (1) on the horizontal basal plane,
Be fixed on the vertical guide rod (2) on the said base (1),
Be used to drive the hoisting gear (4) that hoisting frame (3) moves along guide rod (2),
Be used for hoisting frame (3) is locked in the clamping device (5) of the select location on the guide rod (2),
Be fixedly mounted on the mounting disc (7) on the hoisting frame (3),
And, be suspended at the accurate mass of calibration (6) of hoisting frame (3) below;
The through hole of the accurate mass of said calibration (6) on hoisting frame (3) is fixedly connected with mounting disc (7), and also is provided with automatic centering mechanism in the said mounting disc (7).
2. dynamic force calibration structure according to claim 1 is characterized in that, said hoisting frame (3) is provided with the pilot hole that cooperates with guide rod (2).
3. dynamic force calibration structure according to claim 1 and 2 is characterized in that, said guide rod (2) is symmetricly set in hoisting frame (3) both sides.
4. dynamic force calibration structure according to claim 1 and 2 is characterized in that, the accurate mass of said calibration (6) passes the manhole of offering at hoisting frame (3) center and is fixedly connected with mounting disc (7).
5. dynamic force calibration structure according to claim 4 is characterized in that, the accurate mass of said calibration (6) is flanged (FLGD) right cylinder, and bulb is processed in the flange end.
6. dynamic force calibration structure according to claim 4 is characterized in that, the accurate mass of said calibration (6) whole height greater than hoisting frame (3) highly, and the accurate mass of said calibration (6) upper end is fixedly connected with mounting disc (7).
7. dynamic force calibration structure according to claim 1 is characterized in that, said clamping device (5) is fixedly connected with hoisting frame (3).
8. dynamic force calibration structure according to claim 7 is characterized in that, said clamping device (5) places hoisting frame (3) inside.
9. dynamic force calibration structure according to claim 1; It is characterized in that; Said automatic centering structure is for to be arranged at circular seam, sphere or the cone structure on mounting disc (7) lower surface, and said automatic centering structure and hoisting frame (3), mounting disc (7) and the coaxial setting of calibration accurate mass (6).
10. dynamic force calibration structure according to claim 1 is characterized in that, it also comprises the stackable change standard quality piece (8) that is fixed in the mounting disc (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200353264U CN202442841U (en) | 2012-02-03 | 2012-02-03 | Dynamic force calibrating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200353264U CN202442841U (en) | 2012-02-03 | 2012-02-03 | Dynamic force calibrating structure |
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| CN202442841U true CN202442841U (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200353264U Expired - Lifetime CN202442841U (en) | 2012-02-03 | 2012-02-03 | Dynamic force calibrating structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564692A (en) * | 2012-02-03 | 2012-07-11 | 苏州世力源科技有限公司 | Dynamic force calibrating structure |
| CN103528754A (en) * | 2013-10-28 | 2014-01-22 | 天津工业大学 | Measurement device for thin film pressure sensor |
| CN104596427A (en) * | 2015-02-02 | 2015-05-06 | 中国科学院寒区旱区环境与工程研究所 | Low-temperature calibration device of laser displacement sensor |
| CN107037235A (en) * | 2016-11-28 | 2017-08-11 | 东南大学 | A kind of braking glide quantity flexible measurement method and measurement apparatus |
-
2012
- 2012-02-03 CN CN2012200353264U patent/CN202442841U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564692A (en) * | 2012-02-03 | 2012-07-11 | 苏州世力源科技有限公司 | Dynamic force calibrating structure |
| CN102564692B (en) * | 2012-02-03 | 2013-10-23 | 苏州世力源科技有限公司 | Dynamic force calibrating structure |
| CN103528754A (en) * | 2013-10-28 | 2014-01-22 | 天津工业大学 | Measurement device for thin film pressure sensor |
| CN103528754B (en) * | 2013-10-28 | 2016-04-13 | 天津工业大学 | A kind of measurement mechanism of diaphragm pressure sensor |
| CN104596427A (en) * | 2015-02-02 | 2015-05-06 | 中国科学院寒区旱区环境与工程研究所 | Low-temperature calibration device of laser displacement sensor |
| CN107037235A (en) * | 2016-11-28 | 2017-08-11 | 东南大学 | A kind of braking glide quantity flexible measurement method and measurement apparatus |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120919 |
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| CX01 | Expiry of patent term |