CN205103422U - Detection apparatus for high accuracy zero -initial -length spring temperature is floated and long -term creep - Google Patents
Detection apparatus for high accuracy zero -initial -length spring temperature is floated and long -term creep Download PDFInfo
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- CN205103422U CN205103422U CN201520894962.6U CN201520894962U CN205103422U CN 205103422 U CN205103422 U CN 205103422U CN 201520894962 U CN201520894962 U CN 201520894962U CN 205103422 U CN205103422 U CN 205103422U
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Abstract
The utility model discloses a detection apparatus for high accuracy zero -initial -length spring temperature is floated and long -term creep relates to the performance detection technique of physical geography instrument core component. This detection device's structure mainly is: zero set mechanism comprises manual gear, helical tube and lift lead screw, and manual gear and helical tube connect from top to bottom, are provided with the lift lead screw in helical tube, top centre bore at a spring shielding section of thick bamboo is provided with helical tube, in a spring shielding section of thick bamboo, from the top down, lift lead screw connect the silk seat on, go up the spring hang spring, zero -initial -length spring, down the spring hang spring, connect silk seat and electric capacity moving plate to connect gradually down, in the upper and lower space of electric capacity moving plate, the 1st, 2 stator fixed columns set up respectively on the inner wall that supports a section of thick bamboo, and upper and lower electric capacity stator is connected with the 1st, 2 stator fixed columns respectively, electronic system respectively with the electric capacity moving plate, an upper and lower electric capacity stator and a constant temperature section of thick bamboo are connected. The utility model discloses measurement accuracy is high, and resolution ratio is adjustable, temperature adjustable, be applicable to that float and the long -term creep detects to zero -initial -length spring's temperature.
Description
Technical field
The utility model learns the Performance Detection technology of instrument core component with relating to, and particularly relates to the pick-up unit of the drift of a kind of high precision zero-initial-length spring temperature and long-term creep.
Background technology
In field of geophysical exploration, gravimetry is also a kind of important method; Gravimetry data also can be used for the unevenness etc. studying the figure of the earth, inner structure, About The Earth Pole Shift and earth rotation speed; In addition, the accurate Calculation of satellite and missile trajectory, also needs the precise information of aerial gravity field.
Zero-initial-length spring is the core component in high precision relative gravity instrument, and its performance directly affects precision and the performance of relative gravity instrument; High precision relative gravity instrument is a kind of important means of research solid tide and earthquake precursors.
Zero-initial-length spring technology improves the sensitivity of the anti-horizontal disturbance ability of gravity meter and mechanical probe, reduce the physical dimension of probe simultaneously, be that gravity meter can obtain high precision, large area, the basis of high resolving power terrestrial gravitation field data and prerequisite fast, economically, its drift precision that is less, that can reach is higher.
Present relative gravity instrument major part uses the zero-initial-length spring pendulum gravimeter of static method to measure the variable quantity of gravity, and the CHZ type air-sea gravity meter of Inst. of Measurement and Geonomy, Chinese Academy of Sciences's development and the DZW type relative gravity instrument of Earthquake Inst., China Earthquake Bureau's development all adopt this kind of mode.Its principle utilizes pendulum zero-initial-length spring under the effect of different gravity field to stretch the variable quantity being used for balancing gravity produced, and relies on the stroke of this spring to determine the variable quantity of gravity.The measuring accuracy of relative gravity instrument is very high.Flowing relative gravity instrument precision for flow measurement can reach tens even several micro-gal (1 micro-gal=10
-6gal, 1 gal=1cm/s
-2), and more can reach 1 micro-gal for the static relative gravity instrument precision of fixed station observation.But zero-initial-length spring pendulum-type relative gravity instrument generally has the such as problem such as long-term drift, temperature drift.By the impact of zero-initial-length spring self-deformation, all spring pendulum-type relative gravity instrument observe the data obtained all can have drift, and this greatly can affect the reliability of data.
The quality of the performances and parameters of zero-initial-length spring directly has influence on the performance of relevant gravity meter.But because the range of application of zero-initial-length spring is very narrow, substantially only have in part relative gravity instrument and shock insulation platform and just can use, do not have high input batch production both at home and abroad.Particularly domestic, only Inst. of Measurement and Geonomy, Chinese Academy of Sciences and Earthquake Inst., China Earthquake Bureau and other little research institutes made zero-initial-length spring, and the relative gravity instrument of zero-initial-length spring all for developing voluntarily made, do not have for sale, cause lacking effective detection means to the zero-initial-length spring produced.Add that zero-initial-length spring has that long-term creep is very little, creep can increase in time and reduce, the environment such as temperature are had to the characteristics such as very high requirement, makes the detection of zero-initial-length spring have very important meaning.
Summary of the invention
The purpose of this utility model is to fill up the blank detecting zero-initial-length spring performance, provides the pick-up unit of the drift of a kind of high precision zero-initial-length spring temperature and long-term creep.
The purpose of this utility model is achieved in that
Adopting the spring vertical hanging structure of similar relative gravity instrument, for the characteristic that zero-initial-length spring two is important---temperature drift and long-term creep detect, and make the screening of zero-initial-length spring more targeted, make the performance of relevant corresponding gravity meter more excellent.
Specifically, the structure of this pick-up unit is:
Comprise measurand---zero-initial-length spring;
Be provided with pedestal, the 1st, 2,3 studdles, the 1st, 2,3 cushion blocks, shell, thermostatic tube, spring shielding cylinder, support tube, upper and lowerly connect silk seat, upper and lower spring hang spring, upper and lower capacitor fixed plate, electric capacity moving plate, the 1st, 2 stator fixed legs, null setting and electronic system;
Its position and annexation are:
The screw that the 1st screw rod be triangularly arranged, the 2nd screw rod and the 3rd screw rod are each passed through pedestal is placed on corresponding the 1st cushion block be triangularly arranged, the 2nd cushion block and the 3rd cushion block, forms a workbench;
With the center of workbench for axle, be disposed with shell from outside to inside, thermostatic tube and the spring shielding cylinder, the support tube that are connected up and down;
Null setting is made up of manual gear, spiral-tube and elevating screw, and manual gear is connected up and down with spiral-tube,
Elevating screw is provided with in spiral-tube;
The top center hole of spring shielding cylinder is provided with spiral-tube, in spring shielding cylinder, from top to bottom, elevating screw, on connect silk seat, upper spring hang spring, zero-initial-length spring, lower spring hang spring, under connect silk seat and be connected successively with electric capacity moving plate;
In the space up and down of electric capacity moving plate, the 1st, 2 stator fixed legs are separately positioned on the inwall of support tube, and upper and lower capacitor fixed plate the respectively with 1st, 2 stator fixed leg is connected;
Electronic system respectively with electric capacity moving plate, upper and lower capacitor fixed plate, is connected with thermostatic tube.
The utility model has following advantages and good effect:
1. measuring accuracy is high, can realize the observation of the small creep of zero-initial-length spring;
2. Measurement Resolution is adjustable, can increase resolution along with the reduction of zero-initial-length spring creep;
3. system stability, can realize the long-term observation to zero-initial-length spring;
4. temperature is adjustable, realizes the observation to zero-initial-length spring temperature drift;
5. temperature stabilization, the eliminating temperature impact when not needing to observe temperature drift;
Be applicable to detect the drift of the temperature of zero-initial-length spring and long-term creep.
Accompanying drawing explanation
Fig. 1 is the structural representation of this pick-up unit;
Fig. 2 is the block diagram of electronic system.
In figure:
00-zero-initial-length spring;
10-pedestal;
21-the 1 studdle, the 22-the 2 studdle, the 23-the 3 studdle;
31-the 1 cushion block, the 32-the 2 cushion block, the 33-the 3 cushion block;
40-shell;
50-heat-preservation cylinder;
61-spring shielding cylinder, 62-support tube;
71-above connect silk seat, 72-under connect silk seat;
81-upper hang spring, 82-lower hang spring;
91-upper stator, 92-lower stator;
100-electric capacity moving plate;
111-the 1 stator fixed leg, the 112-the 2 stator fixed leg;
120-null setting, 121-manual gear, 122-spiral-tube, 123-elevating screw;
130-electronic system,
131-oscillating unit, 132-pre-amplifier unit, 133-main amplifying unit,
134-lock-in amplify unit, 135-low-pass filter unit, 136-temperature sensing unit,
137-temperature control unit, 138-signal gathering unit.
Embodiment
Describe in detail below in conjunction with drawings and Examples:
One, the structure of this measuring instrument
1, overall
As Fig. 1, this pick-up unit comprises measurand---zero-initial-length spring 00;
Be provided with pedestal 10,1st, 2,3 studdle the 21,22,23, the 1st, 2,3 cushion blocks 31,32,33, shell 40, thermostatic tube 50, spring shielding cylinder 61, support tube 62, upper and lowerly connect silk seat 71,72, upper and lower spring hang spring 81,82, upper and lower capacitor fixed plate 91,92, electric capacity moving plate the 100,1st, 2 stator fixed leg 111,112, null setting 120 and electronic system 130;
Its position and annexation are:
The screw that the 1st screw rod 21 be triangularly arranged, the 2nd screw rod 22 and the 3rd screw rod 23 are each passed through pedestal 10 is placed on corresponding the 1st cushion block 31 be triangularly arranged, the 2nd cushion block 32 and the 3rd cushion block 33, forms a workbench;
With the center of workbench for axle, be disposed with shell 40 from outside to inside, thermostatic tube 50 and the spring shielding cylinder 61 be connected up and down, support tube 62;
Null setting 120 is made up of manual gear 121, spiral-tube 122 and elevating screw 123, manual gear
121 are connected with spiral-tube about 122, are provided with elevating screw 123 in spiral-tube 122;
The top center hole of spring shielding cylinder 61 is provided with spiral-tube 122, in spring shielding cylinder 61, from top to bottom, elevating screw 123, on connect silk seat 71, upper spring hang spring 81, zero-initial-length spring 00, lower spring hang spring 82, under connect silk seat 72 and be connected successively with electric capacity moving plate 100;
In the space up and down of electric capacity moving plate 100, the 1st, 2 stator fixed legs 111,112 are separately positioned on the inwall of support tube 62, and upper and lower capacitor fixed plate 91,92 the respectively with 1st, 2 stator fixed leg 111,112 is connected;
Electronic system 130 respectively with electric capacity moving plate 100, upper and lower capacitor fixed plate 91,92, is connected with thermostatic tube 50.
2, functional part
0) zero-initial-length spring 00
As Fig. 1, zero-initial-length spring 00 is measurand;
Be suspended between hang spring 81 and lower hang spring 82.
1) pedestal 10
As Fig. 1, pedestal 10 is a kind of triangle metal blocks, and its three interior angle places are respectively arranged with the threaded hole with studdle 20 adaptation;
Its function forms workbench with the 1st, 2,3 studdle the 21,22,23 and the 1st, 2,3 cushion blocks 31,32,33.
2) the 1st, 2,3 studdles 21,22,23
As Fig. 1, the external thread of the 1st, 2,3 studdles 21,22,23 and the threaded hole adaptation of pedestal 10.
3) the 1st, 2,3 cushion blocks 31,32,33
1st, 2,3 cushion blocks 31,32,33 are a kind of middle reeded cylindrical metal block, place for studdle 20.
4) shell 40
As Fig. 1, shell 40 is cylindrical metallic cover;
Be fixed on pedestal 10;
Its function gets rid of air-flow to the interference of zero-initial-length spring 00.
5) thermostatic tube 50
As Fig. 1, thermostatic tube 50 is metal cylinder;
Be fixed on pedestal 10, its surface is wound with heater strip, and heater strip is powered by temperature control unit 137;
Its function provides an isoperibol to zero-initial-length spring 00.
6) spring shielding cylinder 61, support tube 62
As Fig. 1, spring shielding cylinder 61 and support tube 62 are interior through identical metal cylinder;
Spring shielding cylinder 61 is connected with support tube about 62;
Its function of spring shielding cylinder 61 is shielded zero-initial-length spring 00, and support tube 62 is support the 1st, 2 stator fixed legs 111,112.
7) upper and lowerly silk seat 71,72 is connect
As Fig. 1, above connect silk seat 71 and under connect the metal joint that silk seat 72 is same structure;
On connect silk seat 71 the elevating screw 123 on top and null setting 120 be connected, the bottom above connecing silk seat 71 is connected with upper hang spring 81;
Under connect silk seat 72 bottom be fixed on moving plate 100, under connect silk seat 72 top be connected with lower hang spring 82;
Its function has been connection function.
8) upper and lower hang spring 81,82
As Fig. 1, upper hang spring 81 and lower hang spring 82 are the tinsel of same structure;
The upper end of upper hang spring 81 is fixed on and connects on silk seat 71, and the lower end of upper hang spring 81 is connected with the upper end of zero-initial-length spring 00;
The upper end of lower hang spring 82 is connected with the lower end of zero-initial-length spring 00, and the lower end of lower hang spring 82 is fixed on down and connects on silk seat 72.
Its function has been connection function.
9) upper and lower stator 91,92
As Fig. 1, upper stator 91 and lower stator 92 are the metal disk of same structure, and its center is porose;
Upper stator 91 and lower stator 92 are separately fixed on the 1st stator fixed leg 111 and the 2nd stator fixed leg 112 with mesophase spherule every the state of a segment distance respectively;
Its function be receive oscillating unit 131 oscillator signal and provide induced signal for electric capacity moving plate 100.
10) electric capacity moving plate 100
As Fig. 1, electric capacity moving plate 100 is a kind of metal disks;
Electric capacity moving plate 100 is fixed on down the lower surface connecing silk seat 72;
Its function is induction zero-initial-length spring 00 elongation and converts voltage signal to by electronic system 130.
11) the 1st, 2 stator fixed legs 111,112
As Fig. 1, the 1st stator fixed leg 111 and the 2nd stator fixed leg 112 are a kind of insulated column;
Be fixed on support tube 62;
Its function is fixing upper and lower stator 91,92.
12) null setting 120
As Fig. 1, null setting 120 is made up of manual gear 121, spiral-tube 122 and elevating screw 123,
Manual gear 121 is connected with spiral-tube about 122, is provided with elevating screw 123 in spiral-tube 122;
Rotation manual gear 121 makes spiral-tube 122 rotate, and elevating screw 123 is elevated, realizes the fine setting of electric capacity moving plate 100 upper and lower displacement, makes it remain in the middle of stator 91 and lower stator 92.
13) electronic system 130
As Fig. 2, electronic system 130 is made up of oscillating unit 131, pre-amplifier unit 132, main amplifying unit 133, lock-in amplify unit 134, low-pass filter unit 135, temperature sensing unit 136, temperature control unit 137 and signal gathering unit 138;
Oscillating unit 131 92 to be connected with in the middle of upper stator 91 and lower stator respectively, provides the sinusoidal signal that equal and opposite in direction, direction are contrary;
Oscillating unit 131 is connected with lock-in amplify unit 134, provides rectified signal;
Electric capacity moving plate 100, pre-amplifier unit 132, main amplifying unit 133, lock-in amplify unit 134, low-pass filter unit 135 are connected successively with signal gathering unit 138, and the displacement (i.e. the length variations amount of zero-initial-length spring 00) of electric capacity moving plate is converted into d. c. voltage signal and collects.
Temperature control unit 137 receives temperature sensing unit 136 and detects temperature value around zero-initial-length spring 00, realizes temp. control function by powering to the heater strip on thermostatic tube 50.
Above-mentioned each functional part of electronic system 130 is universal component.
The working mechanism of electronic system 130 is:
It is identical that oscillating unit 131 produces two frequency amplitudes, the AC signal that phase is 180 ° gives upper stator 91 and lower stator 92 respectively, the induction AC signal that pre-amplifier unit is formed on moving plate 100 is as inputting and being amplified, amplify further through main amplifying unit 133 again, by lock-in amplify unit 134, AC signal is become direct current signal, eventually pass low-pass filter unit 135 and obtain last output voltage, and gathered and record by signal gathering unit 138.
Two, detection method
This detection method is based on above-mentioned pick-up unit, and this pick-up unit is temperature drift for detecting zero-initial-length spring and the instrument of long-term creep amount.
1, temperature drift detection method
Described temperature drift be zero-initial-length spring produce under the influence of the temperature flexible.
Temperature drift detection method comprises the following steps:
1. zero-initial-length spring 00 two ends being suspended between upper hang spring 81 and lower hang spring 82 respectively, making pedestal 10 level by adjusting the 1st, 2,3 studdles 21,22,23;
2. electronic system 130 be energized, the signal that rotation null setting 120 observes electronic system 130 is simultaneously adopted
The output of collection unit 138, until output voltage is 0, now moving plate 100 is positioned at stator 91 and lower stator 92 middle;
3. successively thermostatic tube 50 and shell 40 are fixed on pedestal 10 again;
4. in observation process, pass through parameter change thermostatic tube 50 internal temperature changing temperature control unit 137, the voltage of observation signal collecting unit 138 exports, the signal of simultaneous observation temperature sensing unit 136, just can observe the temperature drift parameter of zero-initial-length spring 00 relatively.
2, long-term creep detection method
Described long-term creep is zero-initial-length spring increase in time and constantly extending under the state of equal in quality block of playing, and elongation constantly extends along with the increase of time, and variable quantity is more and more less.
Long-term creep detection method comprises the following steps:
1. the two ends of zero-initial-length spring 00 being suspended on respectively between upper hang spring 81 and lower hang spring 82, making pedestal 10 level by adjusting the 1st, 2,3 studdles 21,22,23;
2. electronic system 130 be energized, rotation null setting 120 is observed electronic system 130 signal simultaneously and is adopted
The output of collection unit 138, until output voltage is 0, now moving plate 100 is positioned at stator 91 and lower stator 92 middle;
3. successively thermostatic tube 50 and shell 40 are fixed on pedestal 10 again;
4. by temperature control unit 137, temperature is controlled to be a definite value in observation process;
5. long-term observation the voltage of tracer signal collecting unit 138 export, and realize the detection to zero-initial-length spring long-term creep.
Three, operation instruction
1, pedestal 10 level must be made by the 1st, 2,3 studdles 21,22,23 before detection, otherwise the inclination of zero-initial-length spring 00 may be caused, make the data of observation inaccurate;
2, this pick-up unit is placed on 1st floor as far as possible, zero-initial-length spring 00 may be caused unstable due to earth shock, affect the observation data of pick-up unit because be placed on high level;
3, do not want touch detection device in testing process, otherwise can have an impact to the state of zero-initial-length spring 00, if cause fierceness to rock, also may produce damage to upper and lower hang spring 81,82 and even rupture, make pick-up unit ineffective.
4, because creep when zero-initial-length spring 00 is just produced out is very large, and As time goes on and slowly reduce, therefore to determine the enlargement factor of pre-amplifier unit 132 in electronic system, main amplifying unit 133 and lock-in amplify unit 134, then adjust enlargement factor along with the reduction of creep compliance.
Claims (2)
1. a pick-up unit for the drift of high precision zero-initial-length spring temperature and long-term creep, comprises detected object---zero-initial-length spring (00); It is characterized in that:
Be provided with pedestal (10), 1st, 2,3 studdles (21,22,23), the 1st, 2,3 cushion blocks (31,32,33), shell (40), thermostatic tube (50), spring shielding cylinder (61), support tube (62), upper and lowerly connect silk seat (71,72), upper and lower spring hang spring (81,82), upper and lower capacitor fixed plate (91,92), electric capacity moving plate (100), the 1st, 2 stator fixed legs (111,112), null setting (120) and electronic system (130);
Its position and annexation are:
The screw that the 1st screw rod (21) be triangularly arranged, the 2nd screw rod (22) and the 3rd screw rod (23) are each passed through pedestal (10) is placed on corresponding the 1st cushion block (31) be triangularly arranged, the 2nd cushion block (32) and the 3rd cushion block (33), forms a workbench;
With the center of workbench for axle, be disposed with shell (40) from outside to inside, thermostatic tube (50) and the spring shielding cylinder (61) be connected up and down, support tube (62);
Null setting (120) is by manual gear (121), spiral-tube (122) and elevating screw (123) group
Become, manual gear (121) is connected up and down with spiral-tube (122), is provided with elevating screw (123) in spiral-tube (122);
The top center hole of spring shielding cylinder (61) is provided with spiral-tube (122), in spring shielding cylinder (61), from top to bottom, elevating screw (123), on connect silk seat (71), upper spring hang spring (81), zero-initial-length spring (00), lower spring hang spring (82) under connect silk seat (72) and be connected successively with electric capacity moving plate (100);
In the space up and down of electric capacity moving plate (100), the 1st, 2 stator fixed legs (111,112) are separately positioned on the inwall of support tube (62), and upper and lower capacitor fixed plate (91,92) the respectively with 1st, 2 stator fixed leg (111,112) is connected;
Electronic system (130) respectively with electric capacity moving plate (100), upper and lower capacitor fixed plate (91,92), is connected with thermostatic tube (50).
2., by pick-up unit according to claim 1, it is characterized in that:
Described electronic system (130) is made up of oscillating unit (131), pre-amplifier unit (132), main amplifying unit (133), lock-in amplify unit (134), low-pass filter unit (135), temperature sensing unit (136), temperature control unit (137) and signal gathering unit (138);
Oscillating unit (131) is connected with (92) in the middle of upper stator (91) and lower stator respectively;
Oscillating unit (131) is connected with lock-in amplify unit (134);
Electric capacity moving plate (100), pre-amplifier unit (132), main amplifying unit (133), lock-in amplify unit (134), low-pass filter unit (135) are connected successively with signal gathering unit (138);
Temperature control unit (137) receives temperature sensing unit (136) and detects zero-initial-length spring (130) temperature value around, powers by giving the heater strip on thermostatic tube (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520894962.6U CN205103422U (en) | 2015-11-11 | 2015-11-11 | Detection apparatus for high accuracy zero -initial -length spring temperature is floated and long -term creep |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520894962.6U CN205103422U (en) | 2015-11-11 | 2015-11-11 | Detection apparatus for high accuracy zero -initial -length spring temperature is floated and long -term creep |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205103422U true CN205103422U (en) | 2016-03-23 |
Family
ID=55519197
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520894962.6U Withdrawn - After Issue CN205103422U (en) | 2015-11-11 | 2015-11-11 | Detection apparatus for high accuracy zero -initial -length spring temperature is floated and long -term creep |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205103422U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259592A (en) * | 2015-11-11 | 2016-01-20 | 中国科学院测量与地球物理研究所 | High-precision zero-length spring temperature drift and long-term creep deformation detector |
| CN114850352A (en) * | 2022-05-30 | 2022-08-05 | 中国科学院精密测量科学与技术创新研究院 | High-precision metal zero-length spring reverse rotation device |
-
2015
- 2015-11-11 CN CN201520894962.6U patent/CN205103422U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259592A (en) * | 2015-11-11 | 2016-01-20 | 中国科学院测量与地球物理研究所 | High-precision zero-length spring temperature drift and long-term creep deformation detector |
| CN114850352A (en) * | 2022-05-30 | 2022-08-05 | 中国科学院精密测量科学与技术创新研究院 | High-precision metal zero-length spring reverse rotation device |
| CN114850352B (en) * | 2022-05-30 | 2023-05-30 | 中国科学院精密测量科学与技术创新研究院 | High-precision metal zero-length spring reverse rotation device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160323 Effective date of abandoning: 20170630 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160323 Effective date of abandoning: 20170630 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |