CN204613420U - A kind of portable relative gravity instrument based on high pressure suspending - Google Patents
A kind of portable relative gravity instrument based on high pressure suspending Download PDFInfo
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- CN204613420U CN204613420U CN201520280037.4U CN201520280037U CN204613420U CN 204613420 U CN204613420 U CN 204613420U CN 201520280037 U CN201520280037 U CN 201520280037U CN 204613420 U CN204613420 U CN 204613420U
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Abstract
The utility model discloses a kind of portable relative gravity instrument based on high pressure suspending, comprise vacuum cavity, temperature control modules, high pressure suspending control module, Level tune module, mechanical sensitivity probe module; Vacuum cavity provides the working environment of a high vacuum for mechanical sensitivity probe module; Temperature control modules provides the constant temperature working environment of a temperature fluctuation within 0.01 DEG C for mechanical sensitivity probe module; High pressure suspending control module offsets earth's surface acceleration of gravity for mechanical sensitivity probe module provides kilovolt high pressure to produce enough electrostatic force, and its output feedack voltage signal characterizes local gravitational acceleration value; Level tune module provides the workbench of a level for mechanical sensitivity probe module; Mechanical sensitivity probe module is the core component of this portable relative gravity instrument, and wherein movable plate electrode is subject to six roots of sensation filament and two spring constraints only can along its axis direction translation.
Description
Technical field
The utility model belongs to acceleration of gravity fields of measurement, more specifically relates to a kind of portable relative gravity instrument suspended based on electrostatic high-pressure.
Background technology
Measurement accuracy gravity acceleration g and change thereof have vital role in fields such as geodetic surveying, earthquake prediction, resource explorations.Generally speaking, gravity meter is divided into absolute gravimeter and relative gravity instrument, and wherein absolute gravimeter mainly adopts arrangement and freely falling body method, is used for measuring the absolute value of gravity acceleration g; Relative gravity instrument can adopt super-conductive magnetic suspension principle and precision spring principle, is used for measuring the relative change of gravity acceleration g.The relative gravity instrument of based superconductive magnetic suspension principle needs to be operated in low temperature environment, and therefore relative volume is huge, and structure is more complicated; Performance index based on precision spring principle relative gravity instrument are directly relevant to mechanical spring, and this proposes strict requirement to the manufacture craft of spring, and current precision optical machinery spring machining process is the weak link of domestic relative gravity instrument development.
Utility model content
The purpose of this utility model is to provide a kind of relative gravity instrument based on high pressure suspending, and the potential measuring accuracy of its vertical direction can reach milligal level (1mGal=10
-5m/s
2); Because Machine Design ensures that pole plate is rectilinear motion but not circular motion, therefore the nonlinearity erron of machinery introducing is little; In addition this kind of gravity meter does not adopt precision optical machinery spring, and structure is simple, be easy to carry, function modoularization.
To achieve these goals, the utility model provides a kind of portable relative gravity instrument based on high pressure suspending, comprises vacuum cavity, temperature control modules, high pressure suspending control module, Level tune module and mechanical sensitivity probe module; Described temperature control modules is used for controlling the temperature of described vacuum cavity inside, reduces the temperature fluctuation of described vacuum cavity inside; Described high pressure suspending control module is arranged on around described vacuum cavity, for providing electrostatic suspension power; Described Level tune module installation is in the upper surface of described vacuum cavity, and parallel with the movable plate electrode in described mechanical sensitivity probe module; Described mechanical sensitivity probe module is arranged in described vacuum cavity, and described mechanical sensitivity probe module comprises the first sensing probe skeleton, the second sensing probe skeleton, the first fixed plate, movable plate electrode and the second fixed plate; Described first fixed plate is fixed in described first sensing probe skeleton; Described second fixed plate is fixed in described first sensing probe skeleton; Described movable plate electrode is positioned in the middle of described first fixed plate and described second fixed plate; During work, by measuring the displacement of relatively described first fixed plate of described movable plate electrode and described second fixed plate, and by applying kilovolt high-voltage signal generation electrostatic force, described movable plate electrode is suspended in described vacuum cavity.
Wherein, vacuum cavity comprises vacuum cavity base unit and vacuum chamber unit, and mechanical sensitivity probe module provides a vacuum working environment; Described temperature control modules snugly fits into vacuum cavity both sides, makes the operating. temperature fluctuations of gravity meter be stabilized within 0.01 DEG C; Described high pressure suspending control module comprises capacitive displacement sensing unit, PID control module and high-voltage feedback unit, capacitive displacement sensing unit measures the relative fixed plate displacement of movable plate electrode, calculate through PID control module, utilize high-voltage feedback unit to apply high-voltage signal at top crown and produce the gravity acceleration g that enough attractive forces offset movable plate electrode vertical direction; Level tune module is arranged on vacuum cavity, coordinates and carries out measuring and regulate to gravity meter horizontal direction; Mechanical sensitivity probe module is positioned in vacuum cavity, mainly comprise movable plate electrode, fixed plate and sensing probe skeleton, wherein two pieces of fixed plates are fixed on sensing probe skeleton, movable plate electrode is connected with sensing probe skeleton with two springs by six roots of sensation filament, and limit the motion of movable plate electrode horizontal direction, make it only can move along vertical direction, movable plate electrode and fixed plate cooperatively interact and form differential capacitance;
Further preferably, described vacuum cavity can be cube structure, can be cylindrical structure.
Further preferably, described temperature control modules is closely symmetrically distributed in vacuum cavity both sides.
Further preferably, described Level tune module is arranged on vacuum cavity, ensures that it is parallel with movable plate electrode by mechanical erection.Described Level tune module comprises two orthogonal first level meters and the second level meter, and described first level meter is for measuring the angle of inclination of gravity meter along a horizontal direction; Described second level meter is for measuring the angle of inclination of gravity meter along another horizontal direction.
Further preferably, in described mechanical sensitivity probe module, movable plate electrode is connected with sensing probe skeleton with the 6th filament by the first filament, the second filament, the 3rd filament, the 4th filament, the 5th filament, be limited braking pole plate in the motion except vertical direction degree of freedom, need the first filament, the second filament and the 3rd filament in same plane, 4th filament, the 5th filament and the 6th filament are in same plane, first filament and the 4th filament are in same plane, second filament and the 5th filament are in same plane, and the 3rd filament and the 6th filament are in same plane.
Further preferably, the tight vacuum cavity side of described high pressure suspending control module, mainly comprises capacitive displacement sensing unit, PID control module and high-voltage feedback unit; Described capacitive displacement sensing unit is connected by being with shielded conductor with two pieces of fixed plates and monolithic movable plate electrode, be used for measuring the displacement of movable plate electrode relative fixed plate, described high-voltage feedback unit applies at top crown the gravity acceleration g that kilovolt high pressure produces enough electrostatic force counteracting movable plate electrode vertical directions by band shielded conductor.
Further preferably, described capacitive displacement sensing unit comprises: preamplifier, its input end is connected to described first fixed plate and described second fixed plate, carries out exporting the first voltage signal after mutual resistance is amplified to low current signal; AC amplifier, its input end is connected to the output terminal of described preamplifier, forms the second voltage signal of low noise to the bandwidth external noise of described first voltage signal after decaying; Detuner, its input end is connected to the output terminal of described AC amplifier, extracts the amplitude of described second voltage signal and forms tertiary voltage signal; Low-pass filter, its input end is connected to the output terminal of described detuner, the high frequency noise in tertiary voltage signal described in filtering, and extracts the 4th voltage signal of required low frequency; Carrier offset voltage generating unit, its output terminal is connected to described movable plate electrode, produces high frequency sinusoidal modulation signal and DC offset voltage.
Wherein, the input end of preamplifier is for connecting described fixed plate, and the output terminal of described low-pass filter unit provides the displacement information of the relative fixed plate of movable plate electrode; The output terminal of described carrier signal and bias voltage generator for being connected described movable plate electrode, and provides frequency is 10kHz-100kHz, amplitude is 0.1V-100V AC modulated signals and amplitude to be about the DC offset voltage of 0.1V-100V for described movable plate electrode.
The utility model compared with prior art, has the following advantages and effect:
(1) this instrument does not need precision spring mechanical lock to put protective device, and therefore structure is simple, volume is little, quality is light, good portability and easy to operate and function modoularization;
(2) mechanical sensitivity probe employing low-temperature coefficient, high stability material are made, and be operated in high vacuum environment, simultaneous temperature control system can provide the isoperibol of 0.01 DEG C for measuring process, therefore high, the good stability of this instrument multiplicity, little by external environment condition interference.
(3) owing to have employed the motion of suitable measure restriction movable plate electrode in other degree of freedom, therefore its output signal does not affect by horizontal direction cross-coupling acceleration, and the linearity of mechanical sensitivity probe is relatively better.
(4) this instrument scaling factor can dynamic adjustments, can directly build vehicle-mounted, airborne, surface-ship gravimeter in conjunction with stable platform, and provides technical foundation for airborne gradiometer.
Accompanying drawing explanation
Fig. 1 (a) is the structural representation based on high pressure suspending portable gravity meter that the utility model embodiment provides;
Fig. 1 (b) is the inner structure skeleton view based on high pressure suspending portable gravity meter that the utility model embodiment provides;
Fig. 2 is the structural representation of the vacuum cavity that the utility model embodiment provides;
Fig. 3 is the structural representation of the temperature control modules that the utility model embodiment provides;
Fig. 4 is the structural representation of the high pressure suspending control module that the utility model embodiment provides;
Fig. 5 is the structural representation of the capacitive displacement sensing unit that the utility model embodiment provides;
Fig. 6 is the structural representation of the Level tune module that the utility model embodiment provides;
Fig. 7 is the structural representation of the mechanical sensitivity probe module that the utility model embodiment provides;
Fig. 8 is the movable plate electrode that provides of the utility model embodiment and fixed plate mounting structure schematic diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
A kind of portable relative gravity instrument based on electrostatic high-pressure suspension theory that the utility model provides, does not adopt precision optical machinery spring can measure the change of local gravitational acceleration g; Mainly be applicable to the scientific domains such as ground resource exploration, fast gravimetry.The relative gravity instrument based on high pressure suspending that the utility model provides and based superconductive maglev relative gravity instrument similar, its principle of work is the displacement information utilizing capacitance sensing circuit to measure movable plate electrode relative fixed plate, and applies high pressure V at top crown
hproduce enough electrostatic force to suspend movable plate electrode, now obtaining gravity acceleration g can be expressed as
relatively traditional super-conductive magnetic suspension principle and the relative gravity instrument of precision spring principle are a kind of novel relative gravity instrument utilizing high pressure generation electrostatic virtual spring to offset gravity acceleration g based on high pressure suspending gravity meter.Relative super-conductive magnetic suspension principle gravity meter, it does not need superconduction low temperature environment; Relative precision spring principle gravity meter, it is not owing to having spring, does not need to design in addition the impact that mechanical lock pendulum device restriction handling process may cause spring, reduces the complicacy of Machine Design, and the less convenient carrying of volume.
The portable relative gravity instrument energy fast speed real-time measurement earth's surface gravity acceleration g based on high pressure suspending that the utility model provides; As shown in Figure 1, for convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows for its structure:
Portable relative gravity instrument based on high pressure suspending needs to produce nearly thousand panel height pressures movable plate electrode that suspends and offsets earth's surface gravity acceleration g, now between movable plate electrode and fixed plate, form very strong electric field, easily puncture the insulating mediums such as air, therefore need for mechanical sensitivity probe provides a high vacuum environment to suppress high-voltage breakdown phenomenon; In addition environmental temperature fluctuation and the impact of instrument inclination on mechanical sensitivity probe also need to weaken; Therefore this relative gravity instrument mainly comprises vacuum cavity 1, temperature control modules 2, high pressure suspending control module 3, Level tune module 4, mechanical sensitivity probe module 5; Wherein temperature control modules 2 is arranged on vacuum cavity 1 both sides, is convenient to the temperature fluctuation and the thermograde fluctuation that reduce mechanical sensitivity probe working environment; High pressure suspending control module 3 is arranged on around vacuum cavity 1, provides electrostatic suspension power for movable plate electrode suspends; Level tune module 4 is arranged on vacuum cavity 1 upper surface, ensures that Level tune module 4 is parallel with movable plate electrode in mechanical sensitivity probe module 5 by mechanical erection, by debugging early stage as instrument provides the duty of a horizontal direction; It is inner that mechanical sensitivity probe module 5 is installed on vacuum cavity 1, is operated in the environment of a high vacuum.
Fig. 2 is that vacuum cavity selects that thermal conductivity is good, permeability is low, gas efficiency is little, the metal material of easy processing, as aluminium, stainless steel etc.; Vacuum cavity shape can carry out appropriate design according to demand, generally selects cube or right cylinder etc.; Vacuum cavity comprises vacuum cavity base unit 11 and vacuum chamber unit 12, and mechanical sensitivity probe module 5 and vacuum chamber unit 12 are fixed on vacuum chamber base 11.
Temperature control modules 2 is symmetrically distributed in vacuum chamber 12 both sides, and its ingredient mainly comprises temperature sensor 21, PI controller 22, current converter 23 and resistive heater 24 as shown in Figure 3.The temperature on temperature sensor 21 Real-Time Monitoring vacuum cavity 12 surface, temperature sensor signal is converted to feedback voltage signal by PI controller 22, current converter 23 applies suitable current signal according to feedback voltage signal in resistive heater 24, produces heat and heats vacuum chamber 12.Temperature control modules is symmetrically distributed in vacuum chamber 12 both sides, can reduce temperature fluctuation and the thermograde of vacuum cavity inside.
The control module of high pressure suspending shown in Fig. 43 be applied to for generation of the high-voltage signal of nearly kilovolt form differential capacitance the first fixed plate 53 and the second fixed plate 55 on, and produce enough electrostatic force for offsetting vertical direction gravity acceleration g; High pressure suspending control module 3 comprises capacitive displacement sensing unit 31, PID control module 32 and high-voltage feedback unit 33; Capacitive displacement sensing unit 31 is used for measuring the displacement information of relative first fixed plate 53 of movable plate electrode 54 and the second fixed plate 55, its input end is connected by being with the wire shielded with the first fixed plate 53 and the second fixed plate 54 respectively, its output terminal is connected by being with the wire shielded with movable plate electrode 54, and these screen layers connecting wire are all connected to the ground the impact produced weak signal for shielding environment electromagnetic field wave; The displacement information of relative first fixed plate 53 of PID control module 32 pairs of movable plate electrodes 54 and the second fixed plate 55 carries out the process such as filtering, amplification, integration, is finally translated into feedback voltage signal; Final kilovolt high pressure, through the filter and amplification of high-voltage feedback unit 33, is applied on the first fixed plate 53 and the second fixed plate 55 by feedback voltage signal.
In the utility model embodiment, as shown in Figure 5 capacitive displacement sensing unit 31 comprise realize mutual resistance and amplify preamplifier 311, attenuation bandwidth external noise AC amplifier 312, extract the detuner 313 of high-frequency signal amplitude, the low-pass filter 314 of filter away high frequency noise and produce the carrier offset voltage generating unit 315 of high frequency sinusoidal modulation signal and DC offset voltage; First fixed plate 53, second fixed plate 55 is connected by being with the wire shielded with preamplifier 311, and carrier offset voltage generating unit 315 provides frequency is 10kHz-100kHz, amplitude is 0.1V-100V AC modulated signals and amplitude to be the DC offset voltage of 0.1V-100V for movable plate electrode 54; The differential capacitance signal madulation of low-frequency range to high frequent carrier frequency 10kHz-100kHz place, being improved circuit signal to noise ratio (S/N ratio) by exchanging amplifying unit 312, extracting required low-frequency range differential capacitance signal through demodulating unit 313 and low-pass filter unit 314 by modulation signal.
In the utility model embodiment, as shown in Figure 6, Level tune module 4 comprises two orthogonal first level meter 41 and the second level meters 42, can select the level meter of 0.02mm/m precision, reduces the impact that instrument tilts on Output rusults.
In the utility model embodiment, as shown in Figure 7, mechanical sensitivity probe module 5 comprises low-expansion first sensing probe skeleton 51, low-expansion second sensing probe skeleton 52, first fixed plate 53, movable plate electrode 54 and the second fixed plate 55; First fixed plate 53 is fixed in the first sensing probe skeleton 51; Second fixed plate 55 is fixed in the first sensing probe skeleton 52; Movable plate electrode 54 is positioned in the middle of the first fixed plate 53 and the second fixed plate 55.
Wherein the first fixed plate 53 and the second fixed plate 55 are less than 10 by expansion coefficient
-7devitrified glass be made into the disc-shape corresponding with movable plate electrode 54 through machining, then through Surface abrasive with gold-platedly to form; Movable plate electrode 54 adopts the light material of low thermal coefficient of expansion, low magnetic susceptibility, high-termal conductivity to make, and suppresses ambient temperature disturbance, electromagnetic field change on the impact of mechanical sensitivity probe module generation, magnetic susceptibility can be selected here to be less than 10
-5low-temperature coefficient plation; The flatness of the first fixed plate 53, movable plate electrode 54 and the second fixed plate 55 is better than 2 μm; The temperature coefficient of the mechanical sensitivity probe after installation is little, stability good, electric conductivity is good.
First fixed plate 53, movable plate electrode 54 and the second fixed plate 55 install relative displacement as shown in Figure 8, by six roots of sensation diameter be 20 μm of labels be respectively 571,572,573,574,575 and 576 thin tungsten filament and two labels zero-initial-length spring of being respectively 561 and 562 limit the horizontal degree of freedom of movable plate electrode 54 and move, thin tungsten filament is fixedly connected with movable plate electrode with zero-initial-length spring one end, and the other end is fixed on sensing probe skeleton 51 and 52; Wherein thin tungsten filament 571,572 and 573 is in first plane, thin tungsten filament 574,575 and 576 is in second plane, thin tungsten filament 571 and 574 is in the 3rd plane, and thin tungsten filament 572 and 575 is in the 4th plane, and thin tungsten filament 573 and 576 is in the 5th plane; Wherein spring 561 and spring 562 are in the 6th plane; Movable plate electrode 54 is under the constraint of the thin tungsten filament of the six roots of sensation and two springs, one is only had to reach the standard grade the degree of freedom of moving along himself axes normal, not by the impact of horizontal acceleration, and the movement locus of movable plate electrode 54 is straight line instead of circular arc, and the nonlinearity erron therefore introduced is less; This structure is from pulling force, stress or be all axisymmetric from the distribution of tungsten filament position, thus the motion of movable plate electrode 54 is more steady, being conducive to the precision and the antijamming capability that improve instrument, in order to improve the ability of the flat acceleration perturbation motion of instrument water resistant, adopting larger wire drawing pulling force here; When actual motion, movable plate electrode 54 also has minor rotation while axis translation, but does not affect the precision of instrument.
As an embodiment of the present utility model, thin tungsten filament also can adopt the filament of other material to substitute.
In sum, the utility model does not need precision spring mechanical lock to put protective device, and therefore structure is simple, volume is little, quality is light, good portability and easy to operate and function modoularization; Mechanical sensitivity probe adopts low-temperature coefficient, high stability material is made, and be operated in high vacuum environment, simultaneous temperature control system can provide the isoperibol of 0.01 DEG C for measuring process, therefore high, the good stability of this instrument multiplicity, little by external environment condition interference.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. the portable relative gravity instrument based on high pressure suspending, it is characterized in that, comprise vacuum cavity (1), temperature control modules (2), high pressure suspending control module (3), Level tune module (4) and mechanical sensitivity probe module (5);
The temperature of described temperature control modules (2) to described vacuum cavity (1) inside controls, and reduces the temperature fluctuation that described vacuum cavity (1) is inner;
Described high pressure suspending control module (3) is arranged on described vacuum cavity (1) around, provides electrostatic suspension power;
Described Level tune module (4) is arranged at the upper surface of described vacuum cavity (1), and parallel with the movable plate electrode in described mechanical sensitivity probe module (5);
Described mechanical sensitivity probe module (5) is arranged in described vacuum cavity (1), and described mechanical sensitivity probe module (5) comprises the first sensing probe skeleton (51), the second sensing probe skeleton (52), the first fixed plate (53), movable plate electrode (54) and the second fixed plate (55); Described first fixed plate (53) is fixed in described first sensing probe skeleton (51); Described second fixed plate (55) is fixed in described first sensing probe skeleton (52); Described movable plate electrode (54) is positioned in the middle of described first fixed plate (53) and described second fixed plate (55);
During work, by measuring the displacement of relatively described first fixed plate of described movable plate electrode (54) (53) and described second fixed plate (55), and by applying kilovolt high-voltage signal generation electrostatic force, described movable plate electrode (54) is suspended in described vacuum cavity (1).
2. portable relative gravity instrument as claimed in claim 1, is characterized in that, described high pressure suspending control module (3) comprising:
Capacitive displacement sensing unit (31), its input end is connected with described first fixed plate (53) and described second fixed plate (55), its output terminal is connected with described movable plate electrode (54), for measuring the displacement of described movable plate electrode (54) relative to described first fixed plate (53) and the second fixed plate (55);
PID control module (32), for carrying out output feedback signal after PID arithmetic to described displacement; And
High-voltage feedback unit (33); After filter and amplification is carried out to described feedback signal, obtain a kilovolt high-voltage signal, and described kilovolt high-voltage signal is applied on described first fixed plate (53) and described second fixed plate (55).
3. portable relative gravity instrument as claimed in claim 2, is characterized in that, described capacitive displacement sensing unit (31) comprising:
Preamplifier (311), its input end is connected to described first fixed plate (53) and described second fixed plate (55), carries out exporting the first voltage signal after mutual resistance is amplified to low current signal;
AC amplifier (312), its input end is connected to the output terminal of described preamplifier (311), forms the second voltage signal of low noise to the bandwidth external noise of described first voltage signal after decaying;
Detuner (313), its input end is connected to the output terminal of described AC amplifier (312), extracts the amplitude of described second voltage signal and forms tertiary voltage signal;
Low-pass filter (314), its input end is connected to the output terminal of described detuner (313), the high frequency noise in tertiary voltage signal described in filtering, and extracts the 4th voltage signal of required low frequency;
Carrier offset voltage generating unit (315), its output terminal is connected to described movable plate electrode (54), produces high frequency sinusoidal modulation signal and DC offset voltage.
4. portable relative gravity instrument as claimed in claim 1, it is characterized in that, described Level tune module (4) comprises two orthogonal first level meters (41) and the second level meter (42), and described first level meter (41) is for measuring the angle of inclination of gravity meter along a horizontal direction; Described second level meter (42) is for measuring the angle of inclination of gravity meter along another horizontal direction.
5. portable relative gravity instrument as claimed in claim 1, is characterized in that, the expansion coefficient of described first sensing probe skeleton (51) and described second sensing probe skeleton (52) is less than 10
-7.
6. portable relative gravity instrument as claimed in claim 1, is characterized in that, described movable plate electrode (54) only moves along vertical degree of freedom under the restriction of six roots of sensation filament and two zero-initial-length springs.
7. portable relative gravity instrument as claimed in claim 6, is characterized in that, described filament to be diameter the be tungsten filament of 20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520280037.4U CN204613420U (en) | 2015-05-04 | 2015-05-04 | A kind of portable relative gravity instrument based on high pressure suspending |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520280037.4U CN204613420U (en) | 2015-05-04 | 2015-05-04 | A kind of portable relative gravity instrument based on high pressure suspending |
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| CN204613420U true CN204613420U (en) | 2015-09-02 |
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| CN201520280037.4U Withdrawn - After Issue CN204613420U (en) | 2015-05-04 | 2015-05-04 | A kind of portable relative gravity instrument based on high pressure suspending |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793257A (en) * | 2015-05-04 | 2015-07-22 | 中国科学院测量与地球物理研究所 | Portable relative gravity instrument based on high-voltage suspension |
| CN107015287A (en) * | 2017-03-09 | 2017-08-04 | 中国科学院电工研究所 | A kind of gradiometry device and measuring method |
| CN108873090A (en) * | 2018-05-10 | 2018-11-23 | 天津大学 | A kind of gravity measuring device and measurement method based on light suspension |
-
2015
- 2015-05-04 CN CN201520280037.4U patent/CN204613420U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793257A (en) * | 2015-05-04 | 2015-07-22 | 中国科学院测量与地球物理研究所 | Portable relative gravity instrument based on high-voltage suspension |
| CN104793257B (en) * | 2015-05-04 | 2017-10-24 | 中国科学院测量与地球物理研究所 | A kind of portable relative gravity instrument based on high pressure suspending |
| CN107015287A (en) * | 2017-03-09 | 2017-08-04 | 中国科学院电工研究所 | A kind of gradiometry device and measuring method |
| CN107015287B (en) * | 2017-03-09 | 2018-12-11 | 中国科学院电工研究所 | A kind of gradiometry device and measurement method |
| US11402538B2 (en) | 2017-03-09 | 2022-08-02 | Institute Of Electrical Engineering, Chinese Academy Of Sciences | Gravity gradient measurement method and apparatus |
| CN108873090A (en) * | 2018-05-10 | 2018-11-23 | 天津大学 | A kind of gravity measuring device and measurement method based on light suspension |
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