CN208818841U - Resonant mode absolute gravity measurement device - Google Patents
Resonant mode absolute gravity measurement device Download PDFInfo
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- CN208818841U CN208818841U CN201821105524.7U CN201821105524U CN208818841U CN 208818841 U CN208818841 U CN 208818841U CN 201821105524 U CN201821105524 U CN 201821105524U CN 208818841 U CN208818841 U CN 208818841U
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Abstract
A kind of resonant mode absolute gravity measurement device, the device include single pendulum component, are in be vertically arranged to device top and swung in a manner of simple harmonic oscillation；Electromagnetic excitation component, setting is in single pendulum component lower part, for applying the electromagnetic propulsion power of same frequency to single pendulum component, to compensate single pendulum component because moving decaying caused by Damping work；Intermediate connection frame, single pendulum component lower end and electromagnetic excitation component upper end are connected with the intermediate connection frame respectively；Levelling mechanism is arranged in the electromagnetic excitation component outer lower portion, and bottom is supported in ground, and top is connected with the intermediate connection frame；Control mechanism is connected with the single pendulum component, electromagnetic excitation component and levelling mechanism respectively.The utility model without using known reference base station, can the Direct Measurement of Heavy field of force in a short time absolute value, the accuracy of measurement can be ensured under vehicle-mounted complex environment.
Description
[technical field]
The utility model relates to gravimetric technique fields, more particularly to a kind of resonant mode absolute gravity measurement device.
[background technique]
With social development and scientific and technological progress, gravimetric application is more and more important and extensive.Gravity measurement is related to being permitted
It is multi-field, for example, underground mine or underground engineering will affect local gravity field distribution；The flight rail of guided missile or spacecraft
Road can be influenced by gravity field distribution.Absolute gravimeter is the metrical instrument of Direct Measurement of Heavy power acceleration, in measuring science, greatly
There is highly important application in the fields such as ground measurement, earthquake prediction, geological prospecting, military navigation, and absolute gravity measurement also becomes
One of the hot spot of countries in the world research.Metering institute, France is proposed the CAG-01 type absolute gravity measurement based on intervening atom method
Instrument, metering institute, Italy are proposed the IMGC-02 type absolute gravity measurement instrument based on upthrow method, the exploitation of Micro-g company, the U.S.
FG-5 and A-10 series etc..But this kind of apparatus structure is complicated at present, and expensive, commercialization degree is lower.Domestic at present
This kind of equipment is still in research and development, and most of to rest on laboratory stage, volume is larger, difficult in maintenance, is not able to satisfy complicated ring
Border requires.
[summary of the invention]
The purpose of the utility model is to solve the above problems and to provide one kind without using known reference base station, can be in the short time
The absolute value in the interior Direct Measurement of Heavy field of force can ensure that the resonant mode absolute gravity of the accuracy of measurement is surveyed under vehicle-mounted complex environment
Measure device.
To achieve the above object, the utility model provides a kind of resonant mode absolute gravity measurement device, which includes:
Single pendulum component is in be vertically arranged to device top and swung in a manner of simple harmonic oscillation；
Electromagnetic excitation component, setting is in single pendulum component lower part, for applying the electromagnetism of same frequency to single pendulum component
Motive force, to compensate single pendulum component because moving decaying caused by Damping work；
Intermediate connection frame, single pendulum component lower end and electromagnetic excitation component upper end are connected with the intermediate connection frame respectively
It connects；
Levelling mechanism is arranged in the electromagnetic excitation component outer lower portion, and bottom is supported in ground, top and institute
Intermediate connection frame is stated to be connected；
Control mechanism is connected with the single pendulum component, electromagnetic excitation component and levelling mechanism respectively, and
Levelling mechanism is adjusted the levelness of whole device into scope of design before single pendulum component starts to swing, and single pendulum
Component is in a manner of simple harmonic oscillation in swing process, and electromagnetic excitation component applies the electromagnetic propulsion power of same frequency to it, to compensate list
Component is put because moving decaying caused by Damping work, meanwhile, control mechanism acquires the operating parameter of single pendulum component in real time, and electromagnetism swashs
Component is encouraged to the angle step and compensated apparent velocity increment after the motion compensation of single pendulum component, the point of single pendulum component each position
Temperature, pendulum length data, and leveling instruction is sent to levelling mechanism, realize the locking control and device leveling of single pendulum component, and root
Surveyed absolute gravity value is calculated according to acquired data.
Single pendulum component includes connecting plate, three first columns, balance staff, swing arm, pendulum, optical fibre gyro, magnet exciting coil and lists
Put component hold-fast body, wherein the balance staff is set on circular connecting plate, circumference of three first columns along connecting plate
Direction is uniformly distributed, and its upper and lower ends is connected with connecting plate and intermediate connection frame respectively, and the upper end of the swing arm is fixed on described
Balance staff center, swing arm lower end are connected with pendulum, and pendulum side is equipped with optical fibre gyro, and pendulum lower part is connected with magnet exciting coil；Institute
Stating hold-fast body includes the first stepper motor, the second column, first support, nut, sliding rail, slide track seat and bottom plate, wherein described
The motor shaft of first stepper motor is thread spindle, one end of which is fixed in first support, and the motor shaft of the first stepper motor with
Nut thread connection, nut bottom and the slide track seat are affixed, and slide track seat is then slided with the sliding rail being fixed at the top of first support
Cooperation, the bottom of the first support are fixed on bottom plate, nut can be pushed to be moved forward and backward along sliding rail by the first stepper motor
Embrace or leave the pendulum.
The optical fibre gyro and magnet exciting coil are electrically connected with the control mechanism respectively.
The electromagnetic excitation component includes magnet exciting coil and two blocks of adjustable permanent magnets, wherein the magnet exciting coil is connected to
The pendulum lower part of single pendulum component, two blocks of adjustable permanent magnets are symmetricly set on of the magnet exciting coil two sides on the inside of levelling mechanism
On two brackets, lower end is fixed on the bottom plate of hold-fast body.
Adjustable permanent magnet is made of rare earth permanent-magnetic material, and two blocks of adjustable permanent magnets are symmetrically fixed on the bottom plate of hold-fast body
On, the gap between two blocks of adjustable permanent magnets is inserted into for magnet exciting coil, and the rear side of adjustable permanent magnet is equipped with adjusting rod, adjusts rod end
Portion is equipped with the through-hole of insertion handle, and adjustable plate is housed on rear side of the second support, and the adjusting rod passes through adjustable plate and therewith spiral shell
Line connection, handle is inserted and rotated in the through-hole of adjusting rod can drive two blocks of adjustable permanent magnets to move left and right, by changing two
The intensity apart from adjustable magnetic fields between person.
The intermediate connection frame is in the form of annular discs, by circumferentially equally distributed more third upright supports, more thirds
The connecting portion of column and intermediate connection frame is equipped with vibration damping separator.
Levelling mechanism includes horizontal measuring instrument and leveling component, wherein the horizontal measuring instrument is with quartz accelerometer
For the horizontal measuring instrument of sensor, the axis of oscillation close to single pendulum component is arranged；The leveling component is set to described more
In two symmetrically set third column in third column comprising be respectively arranged on second stepper motor in two root posts,
Electric machine support, shell-like nut and shell, wherein the second stepper motor, electric machine support, shell-like nut are in shell, institute
The lower end cross section for stating electric machine support is D-shaped, and third column bottom is fixed in lower end, and the shell-like nut is lower end closed
Sleeve shape body, section match with the electric machine support shape, and the lower end of shell-like nut is equipped with hemisphere in conjunction, should be partly
Sphere can move up and down stretching with shell-like nut or retract in shell, and the motor shaft of the stepper motor is thread spindle, with set
The connection of shape nut thread.
Control mechanism is single-chip microcontroller, is equipped with processing unit, data acquisition unit, digital filtering unit, error compensation meter
Calculation unit, Gravity calculation unit, data exchange unit and temperature compensation unit with user equipment, the data acquisition unit,
Data exchange unit and the temperature-compensating of digital filtering unit, error compensation computing unit, Gravity calculation unit and user equipment
Unit is electrically connected with the processing unit, and data exchange unit is connected with user equipment.
The contribution of the utility model is, provides a kind of completely new absolute gravity measurement device.The utility model base
Acceleration of gravity is measured in single pendulum method, single pendulum component is equipped with magnet exciting coil and single pendulum component hold-fast body, so that device exists
Single pendulum component is held tightly under off position, can effectively avoid what single pendulum component was impacted under obstructed electricity condition by extraneous vibration
It influences to generate shaking.Electromagnetic excitation component then solves single pendulum component during the swing due to swinging friction, the viscous resistance of air
The problem of various Damping works such as power, the amplitude of swing can gradually decay.Its electromagnetism by applying same frequency to single pendulum component
Motive force, to compensate single pendulum component because moving decaying caused by Damping work.The utility model is by levelling mechanism to entire dress
Set carry out Level tune.So that device is remained horizontality, thus the tilting of car body state under vehicle-mounted equal environment can be corrected.
The utility model without using known reference base station, can the Direct Measurement of Heavy field of force in a short time absolute value, and can be in vehicle
Carry the accuracy that measurement is ensured under complex environment.
[Detailed description of the invention]
Fig. 1 is the overall structure stereoscopic schematic diagram of the utility model.
Fig. 2 is the component exploded perspective schematic diagram of the utility model.
Fig. 3 is the single pendulum modular construction stereoscopic schematic diagram of the utility model.
Fig. 4 is the hold-fast body structural upright schematic diagram of single pendulum component.
Fig. 5 is the levelling mechanism structure sectional view of the utility model.
Fig. 6 is the control mechanism structural block diagram of the utility model.
[specific embodiment]
The following example is being explained further and illustrate to the utility model, does not constitute any limit to the utility model
System.
Refering to fig. 1, Fig. 2, the resonant mode absolute gravity measurement device of the utility model include single pendulum component 10, electromagnetism swash
Encourage component 20, intermediate connection frame 30, levelling mechanism 40 and control mechanism 50.
The single pendulum component 10 is the device by gravity drive, in being vertically arranged to device top, and with simple harmonic oscillation
Mode is swung.As shown in FIG. 1 to 3, the single pendulum component 10 include 11, three first columns 12 of connecting plate, balance staff 13,
Swing arm 14, pendulum 15, optical fibre gyro 16, magnet exciting coil 17 and single pendulum component hold-fast body 18.13 both ends of balance staff are by being mounted in
Bearing bearing in bearing block 131, two bearing blocks 131 are fixed on circular connecting plate 11.Three first columns 12
Circumferencial direction along connecting plate 11 is uniformly distributed, and the upper and lower ends of the first column 12 are respectively fixed to connecting plate 11 and intermediate connection frame
On 30, connecting plate 11 is supported by it.The swing arm 14 is circular rod-shaped body, and the upper end is fixed in the balance staff 13
Centre, 14 lower end of swing arm are connected with pendulum 15, which is the swing device of gravity drive, and it is rectangle that it, which is by top, under
Portion is that the blocks of convex is integrally formed.Swing arm 14 can be swung under the gravity of pendulum 15 around balance staff 13.
As shown in FIG. 1 to 3,15 side of pendulum is equipped with optical fibre gyro 16, and a part as pendulum is with swing arm
14 do reciprocally swinging.The optical fibre gyro is the sensor of sensitive angular speed, has small in size, light weight, starting time short, dynamic
The advantages that range is big.The sensitive axis of optical fibre gyro 16 is overlapped with the mass center of pendulum component, is used for whole real-time measurement single pendulum
Motion process, and the amplitude of fluctuation of precise measurement pendulum, and Angle Information is passed into control mechanism 50.Optical fibre gyro conduct
High-precision sensor, it is more sensitive to external working environment, it is easy to be caused under precision by the interference of the factors such as temperature, vibration
Drop.The long-time stability of gyro itself precision simultaneously, can also have an impact the result of gravity measuring equipment.By temperature-compensating,
The variation of Gyro Precision and the influence to gravity measurement result in complete warm range can be obtained, exclude the shadow of ambient temperature factor
It rings, while the error drift of gyro itself can also be detected by periodic calibrating, guarantee that the gravity acceleration value satisfaction of measurement is wanted
It asks.It is connected with magnet exciting coil 17 in 15 lower part of pendulum, is used to together apply single pendulum component 10 with adjustable permanent magnet 21
The electromagnetic propulsion power of same frequency, to compensate single pendulum component because moving decaying caused by Damping work.It the optical fibre gyro 16 and encourages
Magnetic coil 17 is electrically connected with the control mechanism 50 respectively.
The hold-fast body 18 avoids single pendulum component 10 obstructed in a quiescent state holding single pendulum component 10 tightly
It is influenced to generate shaking by extraneous vibration impact under electricity condition.As shown in figure 4, the hold-fast body 18 includes the first stepper motor
181, the second column 182, first support 183, nut 184, sliding rail 185, slide track seat 186 and bottom plate 187.The first stepping electricity
The motor shaft of machine 181 is thread spindle, one end of which is fixed on 183 top of first support, and the motor shaft of the first stepper motor 181 with
Nut 184 is threadedly coupled, which is the profile nut with pedestal, and pedestal and the slide track seat 186 are affixed.The cunning
Rail chair 186 is the U-shaped blocks with sliding slot, and is fixed on the cunning being placed in the sliding slot of slide track seat at the top of first support 183
Rail 185 is slidably matched.The first support 183 is made of two symmetrical U-shaped frame bodies, and bottom is fixed on bottom plate 187.It is logical
Crossing the first stepper motor 181 can push nut 184 to embrace or leave the pendulum 15 along the back-and-forth motion of sliding rail 185.
It is equipped with electromagnetic excitation component 20 in 10 lower part of single pendulum component, is used to apply same frequency to single pendulum component 10
Electromagnetic propulsion power, with compensate single pendulum component because caused by Damping work move decaying.As shown in FIG. 1 to 3, the electromagnetic excitation
Component 20 includes magnet exciting coil 17 and two blocks of adjustable permanent magnets 21.The magnet exciting coil 17 is connected to the pendulum 15 of single pendulum component
Lower part, two blocks of adjustable permanent magnets 21 are symmetricly set on the second support 22 of 17 two sides of the magnet exciting coil on the inside of levelling mechanism
On, lower end is fixed on the bottom plate 187 of hold-fast body, is used to provide high-intensity magnetic field.This is adjustable permanent magnet 21 is by rare earth permanent magnet
Material is made, and two blocks of adjustable permanent magnets 21 are symmetrically fixed on the bottom plate 187 of hold-fast body, the sky between two blocks of adjustable permanent magnets
Gap is inserted into for magnet exciting coil 17.The rear side of adjustable permanent magnet 21 is equipped with adjusting rod 23, and 23 end of adjusting rod is equipped with insertion handle
Through-hole 231 is fixed with adjustable plate 24 on rear side of the second support 22, which is provided with screw hole, and the adjusting rod 23 passes through adjustable plate
24 and therewith screw hole be threadedly coupled.Handle is inserted and rotated in the through-hole 231 of adjusting rod 23 can drive two blocks of adjustable permanent magnets
21 move left and right, by changing the intensity apart from adjustable magnetic fields between the two.When magnet exciting coil 17 is in adjustable 21 shape of permanent magnet
At magnetic field in be powered when, by vertical direction magnetic field force act on, for single pendulum component 10 apply same frequency electromagnetism push away
Power, to compensate single pendulum component because moving decaying caused by Damping work.
As shown in FIG. 1 to FIG. 2, the intermediate connection frame 30 is disklike body, by circumferentially equally distributed three pieces the
The connecting portion of the support of three columns 31, three third columns 31 and intermediate connection frame is equipped with vibration damping separator 32.Centre connection
Frame 30 is for playing connection and supporting role, the list to the single pendulum component 10, electromagnetic excitation component 20 and levelling mechanism 40
The upper end of the lower end and electromagnetic excitation component 20 of putting component 10 is connected with the intermediate connection frame 30 respectively.
Be equipped with levelling mechanism 40 in 20 outer lower portion of electromagnetic excitation component, bottom is supported in ground, top with
The intermediate connection frame 30 is connected.As shown in FIG. 1 to FIG. 2 and Fig. 5, which includes horizontal measuring instrument 41 and leveling
Component 42, wherein the horizontal measuring instrument 41 is arranged on connecting plate 11 close to the axis of oscillation of single pendulum component 10, which surveys
Amount instrument 41 is the horizontal measuring instrument using quartz accelerometer as sensor, is electrically connected with control mechanism 50, by horizontal measurement
Data are sent to control mechanism 50, and control mechanism 50 controls second stepper motor 421, completion pair according to horizontal measurement data result
The Level tune of whole device.The leveling component 42 is set to two symmetrically set the in three third columns 31
In three columns 31, equipment is adjusted to horizontality according to the accelerometer information of horizontal measuring instrument 41.The leveling component 42
Including second stepper motor 421, electric machine support 422 and shell-like nut 423, it is respectively arranged in two root posts.The motor branch
Frame 422 is in shell-like, and cross section is D-shaped, and 31 bottom of third column is fixed in lower end.The section of the shell-like nut 423
It is the D-shaped to match with 422 shape of electric machine support, shell-like nut 423 can only be slided in electric machine support 422
Without being able to rotate.The lower end closure of the shell-like nut 423, or sealed by lower cover, which is equipped with and ground
The ball bumps 4231 of face contact, extended electric machine support 422 is outer during the adjustment or retracts for the lower end of shell-like nut 423
Into electric machine support 422, so that the height of third column 31 changes, to adjusting measuring device to horizontality.Institute
Stating second stepper motor 421 is linear stepping motor, and maximum inclination adjustment angle can achieve about 6 ° or so, be fully able to
Meet the tilting of car body state under vehicle environment.The motor shaft of the second stepper motor 421 is thread spindle, with shell-like nut
423 are threadedly coupled.Control mechanism 50 controls the second stepper motor 421 of the leveling component 42 according to horizontal measurement data result
Rotation pushes shell-like nut 423 to move linearly, to complete the Level tune to whole device.
Intermediate 30 lower part of connection frame be equipped with control mechanism 50, respectively with the single pendulum component 10, electromagnetic excitation
Component 20 and levelling mechanism 40 are connected, and control it.As shown in fig. 6, the control mechanism 50 is single-chip microcontroller, it is equipped with place
It manages unit 51, data acquisition unit 52, digital filtering unit 53, error compensation computing unit 54, Gravity calculation unit 55 and uses
The data exchange unit 56 and temperature compensation unit 57 of family equipment, the data acquisition unit 52 include optical fibre gyro 16 and level
Measuring instrument 41 is connected with processing unit 51 respectively.The digital filtering unit 53, error compensation computing unit 54, temperature
Compensating unit 57 is the module for being loaded with digital filtering, error compensation and temperature-compensation circuit and calculation procedure, respectively with processing
Unit 51 is connected.The Gravity calculation unit 55 is the module for being loaded with absolute gravity and calculating formula, which calculates public
Formula are as follows:
Wherein, T-period of single pendulum
L-swing arm brachium
θ-pendulum arm angle
From above formula it is found that gravity value can be calculated according to parameters such as pivot angle, brachium, periods.
The data acquisition unit 52, digital filtering unit 53, error compensation computing unit 54, Gravity calculation unit 55,
It is electrically connected with the data exchange unit 56 of user equipment and temperature compensation unit 57 with the processing unit 51.The data exchange
Unit 56 is connected by serial line interface with user equipment, to receive and execute the test instruction of user equipment gravity.The control machine
Structure 50 is arranged on assist side 50A, and wiring board 50A is then fixed on intermediate 30 bottom of connection frame.
The working principle of the utility model before single pendulum component 10 starts to swing by control mechanism 50 as shown in fig. 6, controlled
Levelling mechanism 40 adjusts the levelness of whole device into scope of design.The swing process in a manner of simple harmonic oscillation of single pendulum component 10
In, electromagnetic excitation component 20 applies the electromagnetic propulsion power of same frequency to it, to compensate single pendulum component because of fortune caused by Damping work
Dynamic decaying, meanwhile, control mechanism 50 acquires the operating parameter of single pendulum component 10 by data acquisition unit 52 in real time, and electromagnetism swashs
Component 20 is encouraged to the angle step and compensated apparent velocity increment after the motion compensation of single pendulum component 10, single pendulum component everybody
Point temperature, the pendulum length data set.Control mechanism 50 is sent to levelling mechanism 40 holds, unclamps and levels instruction tightly, realizes single pendulum group
The locking control of part 10 and device leveling, the Gravity calculation unit 55 of control mechanism 50 is calculated according to acquired data to be surveyed
Absolute gravity value.
Although being disclosed by above embodiments to the utility model, the scope of the utility model is not limited to
In this, under conditions of conceiving without departing from the utility model, above each component can be understood similar with technical field personnel
Or equivalent element is replaced.
Claims (8)
1. a kind of resonant mode absolute gravity measurement device, which is characterized in that the device includes:
Single pendulum component (10) is in be vertically arranged to device top and swung in a manner of simple harmonic oscillation；
Electromagnetic excitation component (20), setting is in single pendulum component (10) lower part, for applying single pendulum component (10) with frequency
The electromagnetic propulsion power of rate, to compensate single pendulum component because moving decaying caused by Damping work；
Intermediate connection frame (30), single pendulum component (10) lower end and electromagnetic excitation component (20) upper end are connect with the centre respectively
Frame (30) is connected；
Levelling mechanism (40) is arranged in the electromagnetic excitation component (20) outer lower portion, and bottom is supported in ground, top
It is connected with the intermediate connection frame (30)；
Control mechanism (50) is connected with the single pendulum component (10), electromagnetic excitation component (20) and levelling mechanism (40) respectively
It connects, and
Levelling mechanism (40) is adjusted the levelness of whole device into scope of design before single pendulum component (10) starts to swing, and
For single pendulum component (10) in a manner of simple harmonic oscillation in swing process, electromagnetic excitation component (20) applies the electromagnetic propulsion of same frequency to it
Power, to compensate single pendulum component because moving decaying caused by Damping work, meanwhile, control mechanism (50) acquires single pendulum component in real time
(10) operating parameter, electromagnetic excitation component (20) is to angle step after the motion compensation of single pendulum component (10) and compensated
Apparent velocity increment, point temperature, the pendulum length data of single pendulum component each position, and leveling instruction is sent to levelling mechanism (40), it realizes
The locking control of single pendulum component (10) and device leveling, and surveyed absolute gravity value is calculated according to acquired data.
2. resonant mode absolute gravity measurement device as described in claim 1, which is characterized in that the single pendulum component (10) includes
Connecting plate (11), three first columns (12), balance staff (13), swing arm (14), pendulum (15), optical fibre gyro (16), magnet exciting coil
(17) and single pendulum component hold-fast body (18), wherein the balance staff (13) is set on circular connecting plate (11), and described three pieces the
One column (12) is uniformly distributed along the circumferencial direction of connecting plate (11), and its upper and lower ends respectively with connecting plate (11) and intermediate connection frame
(30) it is connected, the balance staff (13) center is fixed in the upper end of the swing arm (14), and swing arm (14) lower end is connected with pendulum
(15), pendulum (15) side is equipped with optical fibre gyro (16), and pendulum (15) lower part is connected with magnet exciting coil (17)；The hold-fast body
(18) include the first stepper motor (181), the second column (182), first support (183), nut (184), sliding rail (185), slide
Rail chair (186) and bottom plate (187), wherein the motor shaft of first stepper motor (181) is thread spindle, one end of which is fixed on
In first support (183), and the motor shaft of the first stepper motor (181) is threadedly coupled with nut (184), nut (184) bottom
Affixed with the slide track seat (186), slide track seat (186) is then matched with sliding rail (185) sliding being fixed at the top of first support (183)
It closes, the bottom of the first support (183) is fixed on bottom plate (187), can push nut by the first stepper motor (181)
(184) it is moved forward and backward along sliding rail (185) and embraces or leave the pendulum (15).
3. resonant mode absolute gravity measurement device as claimed in claim 2, which is characterized in that the optical fibre gyro (16) and encourage
Magnetic coil (17) is electrically connected with the control mechanism (50) respectively.
4. resonant mode absolute gravity measurement device as claimed in claim 2, which is characterized in that the electromagnetic excitation component (20)
Including magnet exciting coil (17) and two pieces of adjustable permanent magnets (21), wherein the magnet exciting coil (17) is connected to the pendulum of single pendulum component
Hammer (15) lower part into shape, two pieces of adjustable permanent magnets (21) are symmetricly set on the of the magnet exciting coil (17) two sides on the inside of levelling mechanism
On two brackets (22), lower end is fixed on the bottom plate (187) of hold-fast body.
5. resonant mode absolute gravity measurement device as claimed in claim 4, which is characterized in that the adjustable permanent magnet (21) by
Rare earth permanent-magnetic material is made, and two pieces of adjustable permanent magnets (21) are symmetrically fixed on the bottom plate (187) of hold-fast body, two pieces it is adjustable forever
Gap between magnet is inserted into for magnet exciting coil (17), and the rear side of adjustable permanent magnet (21) is equipped with adjusting rod (23), adjusting rod
(23) end is equipped with the through-hole (231) of insertion handle, adjustable plate (24) is housed on rear side of the second support (22), the adjusting rod
(23) adjustable plate (24) are passed through and are threadedly coupled therewith, being inserted and rotated handle in the through-hole (231) of adjusting rod (23) can band
Dynamic two pieces of adjustable permanent magnets (21) move left and right, by changing the intensity apart from adjustable magnetic fields between the two.
6. resonant mode absolute gravity measurement device as described in claim 1, which is characterized in that the intermediate connection frame (30) is in
It is discoid, it is supported by circumferentially equally distributed more third columns (31), more third columns (31) and intermediate connection frame
Connecting portion be equipped with vibration damping separator (32).
7. resonant mode absolute gravity measurement device as claimed in claim 6, which is characterized in that the levelling mechanism (40) includes
Horizontal measuring instrument (41) and leveling component (42), wherein the horizontal measuring instrument (41) is using quartz accelerometer as sensor
Horizontal measuring instrument, close to single pendulum component (10) axis of oscillation be arranged；Leveling component (42) is set to described more
In two symmetrically set third column (31) in third column (31) comprising the second step being respectively arranged in two root posts
Into motor (421), electric machine support (422), shell-like nut (423) and shell (424), wherein the second stepper motor
(421), in shell (424), the lower end of the electric machine support (422) is transversal for electric machine support (422), shell-like nut (423)
Face is D-shaped, and third column (31) bottom is fixed in lower end, and the shell-like nut (423) is the sleeve shape body of lower end closed, section
Face matches with the electric machine support (422) shape, and the lower end of shell-like nut (423) is equipped with hemisphere in conjunction, should be partly
Sphere can move up and down stretching with shell-like nut (423) or retract in shell (424), the electricity of the second stepper motor (421)
Arbor is thread spindle, is threadedly coupled with shell-like nut (423).
8. resonant mode absolute gravity measurement device as described in claim 1, which is characterized in that the control mechanism (50) is single
Piece machine is equipped with processing unit (51), data acquisition unit (52), digital filtering unit (53), error compensation computing unit
(54), Gravity calculation unit (55), data exchange unit (56) and temperature compensation unit (57) with user equipment, the data
Acquisition unit (52), error compensation computing unit (54), Gravity calculation unit (55), is set with user digital filtering unit (53)
Standby data exchange unit (56) and temperature compensation unit (57) is electrically connected with the processing unit (51), data exchange unit
(56) it is connected with user equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821105524.7U CN208818841U (en) | 2018-07-12 | 2018-07-12 | Resonant mode absolute gravity measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821105524.7U CN208818841U (en) | 2018-07-12 | 2018-07-12 | Resonant mode absolute gravity measurement device |
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| Publication Number | Publication Date |
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| CN208818841U true CN208818841U (en) | 2019-05-03 |
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ID=66270691
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821105524.7U Active CN208818841U (en) | 2018-07-12 | 2018-07-12 | Resonant mode absolute gravity measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693563A (en) * | 2018-07-12 | 2018-10-23 | 湖南科众兄弟科技有限公司 | Resonant mode absolute gravity measurement device |
| CN110794470A (en) * | 2019-10-24 | 2020-02-14 | 燕山大学 | Experimental device for measuring gravitational acceleration |
-
2018
- 2018-07-12 CN CN201821105524.7U patent/CN208818841U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693563A (en) * | 2018-07-12 | 2018-10-23 | 湖南科众兄弟科技有限公司 | Resonant mode absolute gravity measurement device |
| CN110794470A (en) * | 2019-10-24 | 2020-02-14 | 燕山大学 | Experimental device for measuring gravitational acceleration |
| CN110794470B (en) * | 2019-10-24 | 2021-05-18 | 燕山大学 | Experimental device for measuring gravitational acceleration |
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