CN207752037U - Positive step acceleration of gravity generating means - Google Patents
Positive step acceleration of gravity generating means Download PDFInfo
- Publication number
- CN207752037U CN207752037U CN201820103968.0U CN201820103968U CN207752037U CN 207752037 U CN207752037 U CN 207752037U CN 201820103968 U CN201820103968 U CN 201820103968U CN 207752037 U CN207752037 U CN 207752037U
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- China
- Prior art keywords
- wheel
- hammer
- cotton rope
- dropping channel
- acceleration
- Prior art date
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- Withdrawn - After Issue
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- 230000001133 acceleration Effects 0.000 title claims abstract description 62
- 230000005484 gravity Effects 0.000 title claims abstract description 31
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920000742 Cotton Polymers 0.000 claims description 51
- 238000004804 winding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 7
- 241000219146 Gossypium Species 0.000 description 44
- 238000001228 spectrum Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 240000000047 Gossypium barbadense Species 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses positive step acceleration of gravity generating means, including pedestal, there is vertical dropping channel on pedestal, it drops hammer in dropping channel, drop hammer has gap between dropping channel, and dropping channel bottom has stopper section, drops hammer and is useful for the mounting surface that installation is calibrated sensor；Mounting surface exposes to dropping channel.The gap between dropping channel of dropping hammer makes to drop hammer and can do the movement of falling object in dropping channel, and the freely falling body terminal to drop hammer is stopper section.The utility model demarcates acceleration transducer with positive step acceleration of gravity signal, and positive step acceleration signal caused by demarcating every time is all generated by gravity, and the acceleration magnitude that gravity generates is constant, Accurate Calibration can be carried out to acceleration transducer, equipment is simple simultaneously, and operation is easy.
Description
Technical field
The utility model is related to acceleration transducers to measure calibration field, and especially a kind of positive step acceleration fills
It sets.
Background technology
Acceleration transducer is a kind of important measuring cell, and in space flight, military affairs, industry, automobile etc., the fields person of having is wide
General application.Acceleration transducer will calibrate it during manufacture and use.
Chinese patent 201220747057.4 discloses a kind of acceleration sensor calibration device based on shake table,
Including shake table and "-" type resonant beam, told resonant beam both ends are fixedly connected by boom support with pedestal, and between its both ends
A selected location and the working face of shake table be rigidly connected, and the movement side of the resonant beam and the shake table work top
To vertical, meanwhile, acceleration transducer installation position is additionally provided in the selected location in the resonant beam.This device it is calibrated
Cheng Wei：By the selected location rigid connection between the work top of a shake table and a resonant beam both ends, and by the resonant beam
Both ends are fixedly connected with a pedestal, then standard acceler and acceleration transducer to be calibrated are fixed in a stacked
It is distributed on the acceleration transducer installation position at the selected location of the resonant beam, work top is then made to hang down along with resonant beam
Straight direction vibration, while the standard acceler and acceleration transducer to be calibrated are received and handled with detection device
The signal of output realizes the calibration to acceleration transducer to be calibrated.
The deficiency of the device of this impulse method calibration acceleration transducer is：Shake table vibration generation standard is needed to accelerate
Signal is spent, normal acceleration signal is measured by standard acceler, and there are measurement errors.
Invention content
The purpose of this utility model is to provide one kind when acceleration transducer is calibrated, the acceleration signal generated every time
For the positive step acceleration of gravity signal generation apparatus of acceleration of gravity.
A kind of positive step acceleration of gravity generating means, including pedestal have vertical dropping channel on pedestal, fall logical
It drops hammer in road, drop hammer has gap between dropping channel, and dropping channel bottom has stopper section, drops hammer and is useful for installation by school
The mounting surface of quasi- sensor；Mounting surface exposes to dropping channel.Dropping hammer that the gap between dropping channel makes to drop hammer can be under
It falls and does the movement of falling object in channel, the freely falling body terminal to drop hammer is stopper section.
Cotton rope is sling in vertical direction and drops hammer, and cotton rope drops hammer when disconnecting starts to do freely falling body until terminal, i.e. cotton rope is disconnected
It opens and generates constant positive step acceleration signal even if dropping hammer, which is an acceleration of gravity.By quilt
The signal of calibration sensor output, which obtains, is tested the parameters such as sensor frequency spectrum, realizes calibration.
The acceleration of gravity of experiment spot measures in advance.Alternatively, the present apparatus includes laser vibration measurer, laser vibration measurer pair
Standard is dropped hammer, and the freely falling body stroke to drop hammer wants long enough, to ensure acceleration of gravity signal duration foot in positive step signal
It is enough long, until being terminated by the response of school acceleration transducer.
Further, dropping channel is formed by air bearing, and air bearing is installed on pedestal by bearing block, and stopper section is located at sky
Under gas bearing, stopper section is to protrude inwardly from the protrusion of air bearing inner ring.Air bearing makes to drop hammer between dropping channel
Gap in formed air film, to make to drop hammer fall when without friction.
Further, stopper section is along equally distributed at least two protrusion of air bearing inner ring, alternatively, stopper section is convex
Ring.It drops hammer when reaching stopper section, protrusion holds step between hammer body and extended segment, and the movement of falling object terminates.
Further, dustproof cover is set on air bearing, and dustproof cover is equipped with the hole that the threading hole for allowing to drop hammer exposes.It is dust-proof
Lid position is the starting point of dropping channel.
Further, pedestal is equipped with cotton rope frame and cotton rope, and cotton rope drops hammer for being sling in vertical direction, and the top dropped hammer has
Screw, cotton rope are bundled in screw.Cotton rope, which remains at vertical direction, to be sling and drops hammer.
Further, cotton rope frame includes support plate and wheel axle installing plate, and support plate is located between wheel axle installing plate and pedestal, wheel shaft peace
Loading board one end is fixed with support plate, the other end is hanging, takes turns the fairlead of the hanging section setting cotton rope of axle installing plate, fairlead is vertical
The threading hole that direction face is dropped hammer.Support plate offer is dropped hammer provides suspension with cotton rope.Support plate hangs down perpendicular to support base, wheel axle installing plate
Directly in support plate, that is, it is horizontally disposed to take turns axle installing plate.Cotton rope is after fairlead extraction, and will drop hammer hang-up, before cotton rope disconnects, drops hammer
Position is the starting point of freely falling body stroke.
Further, taking turns has line wheel, the first guide wheel and the second guide wheel in axle installing plate, cotton rope winding is accommodated in line wheel, line wheel
Axis is rotatably connected with wheel axle installing plate, and wheel shaft brake component is arranged by wire wheel axis.Cotton rope is led from line wheel pull-out, successively around first
Wheel and the second guide wheel, cotton rope are tensioned to successively on the first guide wheel and the second guide wheel, cotton rope state in a vertical shape after the second guide wheel
Pass through from cable-through hole.
The shell that axle installing plate is inner hollow is taken turns, line wheel, the first guide wheel and the second guide wheel are installed in wheel axle installing plate
Cavity in, wire wheel axis by expose to wheel axle installing plate line wheel knob fix.
Wheel shaft brake component includes eccentric shaft and knob, and knob exposes to wheel axle installing plate, and eccentric shaft is set to by wire wheel axis.
Knob and eccentric shaft one.
When utility model works, bottom end of dropping hammer will be first fixed on by acceleration pick-up sensor, then cotton rope is fixed on and is fallen
Peen end, then ventilates into air bearing, and then eccentric rotation axis unclamps wire wheel axis, and rotation wire wheel axis is carried by tension filament
It rises and drops hammer, making to drop hammer contacts with dustproof cover, and eccentric rotation axis, which blocks wire wheel axis, makes line wheel not rotate.Finally cotton rope is made to disconnect,
It drops hammer and does the movement of falling object together with acceleration transducer, it can after the output signal of acceleration transducer is carried out data processing
To obtain the parameters such as tested sensor frequency spectrum, to be calibrated.
The utility model advantageous effect is：Acceleration transducer is demarcated with positive step acceleration of gravity signal,
And positive step acceleration signal caused by demarcating every time is all generated by gravity, and the acceleration magnitude that gravity generates is constant
（For an acceleration of gravity）, Accurate Calibration can be carried out to acceleration transducer, while equipment is simple, operation is easy.
Description of the drawings
Fig. 1 is the normal axomometric drawing of the utility model.
Fig. 2 is the schematic cross-sectional view of module of dropping hammer.
Fig. 3 is control module schematic diagram.
Fig. 4 is the schematic diagram of eccentric shaft and wire wheel axis.
Fig. 5 is the schematic diagram to drop hammer.
Specific implementation mode
Embodiment 1
As depicted in figs. 1 and 2, positive step acceleration of gravity generating means, including pedestal 21, pedestal 21 are equipped with by cotton rope
Dropping hammer for suspension 2 and accommodates and drops hammer 2 in the inner and 2 dropping channels for doing the movement of falling object that allow to drop hammer, and cotton rope is in vertical side
2 are dropped hammer to slinging, and the terminal point of dropping channel is baffle ring 3.Drop hammer the 2 extended segment 2B for including hammer body 2A and the bottoms hammer body 2A, hammer
There are gap, extended segment 2B to stretch into baffle ring 3 between body 2A and dropping channel, is calibrated sensor and is fixed on the bottom end dropped hammer.
It after cotton rope disconnects, drops hammer and 2 does the movement of falling object in dropping channel, 2 held by baffle ring 3 until dropping hammer.Often
Secondary cotton rope disconnection all generates constant positive step acceleration signal, which is an acceleration of gravity.It is right
Tested sensor frequency spectrum etc. can be obtained after being calibrated the signal progress data processing of the output of sensor 20, you can realize calibration.
Acceleration of gravity experimental field can measure in advance.Or the utility model carries laser vibration measurer, vibration measurement with laser
Instrument 22 alignment drop hammer, monitoring drop hammer 2 whereabouts when acceleration；Drop hammer 2 freely falling bodies height be greater than or equal to 5mm, with protect
Demonstrate,prove acceleration of gravity signal duration long enough.
The structure of dropping channel is：Pedestal 21 is equipped with support base 10, and tablet 9 is fixedly mounted on support base 10, and installation is flat
Plate 9 is horizontal；Through-hole is set on installation tablet 9, through-hole is fixed on the bottom of through-hole as dropping channel, baffle ring 3.If using Laser Measuring
Vibration Meter measurement drop hammer 2 freely falling body when acceleration, then laser vibration measurer 22 be aligned through-hole.Dropping channel, is fallen the hammer body to drop hammer
The extended segment of hammer and baffle ring are cylinder, on the external cylindrical surface of extended segment cutting have plane, the plane is as stop surfaces 2C.
When installation is calibrated sensor, spanner resists stop surfaces, will be calibrated sensor and screws tight in mounting hole.
Setting air bearing 1 and bearing block 4 in through-hole, bearing block 4 and air bearing 1 are horizontally disposed；Air bearing 1 is installed
In in bearing block 4, air bearing 1 includes ring body 1A, and multiple throttling stomata 1B are evenly distributed on ring body 1A.This reality
It applies in example, by taking four throttle stomata 1B as an example, but the quantity for the stomata 1B that throttles is not limited to four.Single throttling stomata 1B is radially
Through ring body 1A, the inlet end of throttling stomata 1B is connected to admission line, admission line external gas source, throttling stomata 1B's
Outlet side is located at the inner wall of ring body 1A, and baffle ring 3 is located under air bearing 1；Drop hammer 2 be located at ring body 1A in do freedom
Falling.
Dustproof cover 5 is set on air bearing 1, there is the hole that the threading hole for only allowing to drop hammer exposes on dustproof cover 5.Dustproof cover
Presence can prevent from dropping hammer and taken out out of dropping channel, can simultaneously serve as the starting point of freely falling body stroke.
Pedestal is equipped with support plate 8 and wheel axle installing plate 7, and wheel 7 one end of axle installing plate is fixed with support plate 8, the other end is hanging, cotton rope
It is drawn and 2 fixations of dropping hammer from wheel 7 free end of axle installing plate.Support plate 8 for drop hammer 2 and cotton rope provide suspension space.Support plate 8 perpendicular to
It is horizontally disposed to take turns axle installing plate 7 perpendicular to support plate 8 for support base 10, wheel axle installing plate 7.Cotton rope is hanging from wheel axle installing plate 7
After end is drawn, will drop hammer 2 hang-up, and cotton rope is vertically.
Embodiment 2
The present embodiment and embodiment 1 difference lies in：The present embodiment increases in wheel axle installing plate leads provided with line wheel, first
Wheel and the second Guiding wheel structure, remaining structure are same as Example 1.
As shown in figure 3, having line wheel, the first guide wheel and the second guide wheel in wheel axle installing plate 7, cotton rope winding is accommodated in line wheel,
Wire wheel axis 11 is rotatably connected with wheel axle installing plate 7, and wheel shaft brake component is arranged in 11 side of wire wheel axis.Cotton rope pulls out, successively from line wheel
Around the first guide wheel and the second guide wheel, cotton rope is tensioned to successively on the first guide wheel and the second guide wheel, and cotton rope is after the second guide wheel
State in a vertical shape passes through from cable-through hole.In the present embodiment, with the first guide wheel than the second guide wheel close to line wheel 15, the first guide wheel is less than
Second guide wheel, the second guide wheel are located above cable-through hole.Make cotton rope from line as long as the position of the first guide wheel and the second guide wheel can be realized
Wheel 15 is tensioned after drawing and is vertically drawn from cable-through hole, and cotton rope does not contact the purpose of the inner wall of cable-through hole, the
The citing that the position relationship of one guide wheel and the second guide wheel is not limited to the present embodiment.Axis is set between guide wheel and respective guide wheel fulcrum
It holds, guide wheel is enable to be freely rotated.Cotton rope is wound in line wheel, and as cotton rope pulls out, the cotton rope being wound in line wheel is straight
Diameter tapers into, the setting of guide wheel so that cotton rope after line wheel pull-out, the position of cotton rope not in by line wheel cotton rope diameter shadow
It rings.
The shell that axle installing plate 7 is inner hollow is taken turns, line wheel 15, the first guide wheel and the second guide wheel are installed on wheel axle installing plate
In cavity in 7, wire wheel axis 11 is fixed by the line wheel knob for exposing to wheel axle installing plate 7.
As shown in figure 4, wheel shaft brake component includes eccentric shaft and knob 16, knob 16 exposes to wheel axle installing plate 7, eccentric shaft
It is set to by wire wheel axis 11.Knob and eccentric shaft one.Cotton rope is fixed on drop hammer on 2 after, knob 16 makes eccentric shaft clamping line
Wheel shaft 11, line wheel 15 are braked, and cotton rope is tensioned, and are dropped hammer and 2 are vertically hung.Cotton rope is fixed on when dropping hammer on 2, rotation
Button makes eccentric shaft unclamp wire wheel axis 11, and cotton rope can be pulled out from line wheel 15.
When utility model works, 2 bottom ends of dropping hammer will be first fixed on by acceleration pick-up sensor, then cotton rope is fixed on and is fallen
It hammers 2 tops into shape, then ventilates into air bearing 1, then eccentric rotation axis unclamps wire wheel axis 11, and rotation wire wheel axis 11 passes through tension
Filament, which lifts, drops hammer 2, and make to drop hammer 2 contacts with dustproof cover 5, and eccentric rotation axis, which blocks wire wheel axis 11, makes line wheel not rotate.Finally
So that cotton rope is disconnected, drop hammer 2 and acceleration transducer do the movement of falling object together, the output signal of acceleration transducer is carried out
The parameters such as tested sensor frequency spectrum can be obtained after data processing, to be calibrated.
The utility model advantageous effect is：Acceleration transducer is demarcated with positive step acceleration of gravity signal,
And positive step acceleration signal caused by demarcating every time is all generated by gravity, and the acceleration magnitude that gravity generates is constant
（For an acceleration of gravity）, Accurate Calibration can be carried out to acceleration transducer, while equipment is simple, operation is easy.
Content described in this specification embodiment is only enumerating for the way of realization conceived to utility model, this practicality is new
The protection domain of type is not construed as being only limitted to the concrete form that embodiment is stated, the scope of protection of the utility model also and
In those skilled in the art according to the utility model design it is conceivable that equivalent technologies mean.
Claims (7)
1. positive step acceleration of gravity generating means, which is characterized in that including pedestal, there is vertical dropping channel on pedestal,
It drops hammer in dropping channel, drop hammer has gap between dropping channel, and dropping channel bottom has stopper section, drops hammer and is useful for pacifying
Dress is calibrated the mounting surface of sensor；Mounting surface exposes to dropping channel.
2. positive step acceleration of gravity generating means according to claim 1, which is characterized in that dropping channel is by air axis
It holds to be formed, air bearing is installed on pedestal by bearing block, and stopper section is located under air bearing, and stopper section is to protrude inwardly from sky
The protrusion of gas bearing inner race.
3. positive step acceleration of gravity generating means according to claim 2, which is characterized in that stopper section is along air axis
Equally distributed at least two protrusion of inner ring is held, alternatively, stopper section is bulge loop.
4. positive step acceleration of gravity generating means according to claim 3, which is characterized in that be arranged on air bearing
Dustproof cover, dustproof cover are equipped with the hole that the threading hole for allowing to drop hammer exposes.
5. positive step acceleration of gravity generating means according to claim 4, which is characterized in that pedestal is equipped with cotton rope frame
And cotton rope, cotton rope drop hammer for being sling in vertical direction, the top dropped hammer has screw, cotton rope to be bundled in screw.
6. positive step acceleration of gravity generating means according to claim 5, which is characterized in that cotton rope frame include support plate and
Axle installing plate is taken turns, support plate is located between wheel axle installing plate and pedestal, and wheel axle installing plate one end is fixed with support plate, the other end is hanging,
Take turns the fairlead of the hanging section setting cotton rope of axle installing plate, the threading hole that fairlead drops hammer in vertical direction face.
7. positive step acceleration of gravity generating means according to claim 6, which is characterized in that wired in wheel axle installing plate
Wheel, the first guide wheel and the second guide wheel, cotton rope winding are accommodated in line wheel, and wire wheel axis is rotatably connected with wheel axle installing plate, wire wheel axis
Side setting wheel shaft brake component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820103968.0U CN207752037U (en) | 2018-01-22 | 2018-01-22 | Positive step acceleration of gravity generating means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820103968.0U CN207752037U (en) | 2018-01-22 | 2018-01-22 | Positive step acceleration of gravity generating means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207752037U true CN207752037U (en) | 2018-08-21 |
Family
ID=63153819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820103968.0U Withdrawn - After Issue CN207752037U (en) | 2018-01-22 | 2018-01-22 | Positive step acceleration of gravity generating means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207752037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344882A (en) * | 2018-01-22 | 2018-07-31 | 浙江大学 | Positive step acceleration of gravity generating means |
-
2018
- 2018-01-22 CN CN201820103968.0U patent/CN207752037U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344882A (en) * | 2018-01-22 | 2018-07-31 | 浙江大学 | Positive step acceleration of gravity generating means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180821 Effective date of abandoning: 20201106 |