CN203177827U - Extensometer high precision diaphragm micro-displacement calibration device - Google Patents
Extensometer high precision diaphragm micro-displacement calibration device Download PDFInfo
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- CN203177827U CN203177827U CN2013200509101U CN201320050910U CN203177827U CN 203177827 U CN203177827 U CN 203177827U CN 2013200509101 U CN2013200509101 U CN 2013200509101U CN 201320050910 U CN201320050910 U CN 201320050910U CN 203177827 U CN203177827 U CN 203177827U
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Abstract
The utility model discloses an extensometer high precision diaphragm micro-displacement calibration device, and relates to a micro-displacement calibration device. The calibration device comprises a moving object (0), an elasticity diaphragm (1), a diaphragm seat (2), a horizontal wiredrawing (3), a guard board (4), a turning wheel (5), a stepping motor (6), an upper cover plate (7.1), a lower cover plate (7.2), a driving gear (8), a screw (9), a driven gear (10), a hang spring (11), a counterweight (12), a upright rod (13), a baseplate (14) and a turning wheel seat (15). The device solves influence of environmental factors on calibrated error. A displacement constant is constant. The stepping motor is used to control rise and fall of the counterweight, and the device perfectly combines with an extensometer which a station is using. The device is compatible to a data acquisition device which the station is using. The device has simpler structure and is miniaturized. Machining precision requirements are low. The device is convenient to transport and install, and is suitanle for calibration of extensometers.
Description
Technical field
The utility model relates to a kind of micrometric displacement caliberating device, relates in particular to a kind of pantograph high precision membranes displacement calibrating device that declines.
Background technology
Pantograph is the instrument that precision measurement earth's crust rock mass point-to-point transmission horizontal range changes relatively, be applicable to the continuous variation of observation crustal strain and solid tide horizontal component, for the Changing Pattern of the horizontal strain of research earthquake preparation process provides data, also provide significant data for earth elasticity research.
Short pantograph (the Zl200610018250.3 of differential type; CN100483151C) caliberating device has been widely used in hundreds of the earthquake observating stations in the whole nation, its precise structure, but requirement on machining accuracy height, complex manufacturing technology.The inside of caliberating device is made up of dovetail groove and extension spring, utilizes the tapered wedges of 50:1 that length travel is converted to transversal displacement.In long-time use, need in caliberating device, fill it up with oil, guarantee the slip smoothness of dovetail groove.Use twice singularity owing to being only in earthquake observating station caliberating device requirement one, according to the feedback opinion of a plurality of stations, after caliberating device was installed and used 2 years, following problem appearred in caliberating device easily usually:
1, the time solidifies, advances reason such as ash after having grown and makes dovetail groove stuck owing to oil;
2, the tapered wedges requirement on machining accuracy height of 50:1, the uncertainty in the mechanical processing process makes the caliberating device displacement constant of each differ greatly;
3, be subjected to the cavern Effect of Environmental, caliberating device is placed back repeatable accuracy variation for a long time, and displacement constant changes.
Summary of the invention
The purpose of this utility model just is to overcome the shortcoming and defect that prior art exists, and the more simple and reliable pantograph high precision membranes of a kind of structure displacement calibrating device that declines is provided.
The purpose of this utility model is achieved in that
The utility model utilizes constant masterpiece to be used for elastic body, and elastic body each deflection in elastic range is identical, and consequent micrometric displacement amount is identical.The utility model adopts certain thickness diaphragm as elastic body, utilize making a concerted effort as the constant force that acts on the elastic body of weight and backplate gravity, utilize the step motor control weight to rise and fall to guarantee that elastic body is in only is subjected to constant force and two duties that do not stress in elastic range.
Specifically, this device comprises mobile object, flexible sheet, diaphragm seat, horizontal wire drawing, backplate, runner, stepper motor, upper cover plate, lower cover, driving gear, screw rod, follower gear, hang spring, weight, vertical rod, base plate and rotaring wheeling base;
Its position and annexation are:
On base plate, from left to right, be respectively arranged with diaphragm seat, rotaring wheeling base and vertical rod;
The diaphragm seat is provided with flexible sheet;
Rotaring wheeling base is provided with a stationary shaft, and the center pit of runner is enclosed within on the stationary shaft;
Upper cover plate and lower cover connect into a support with vertical rod respectively, upper cover plate is provided with stepper motor, on lower cover, from left to right, be respectively arranged with intermeshing driving gear and follower gear, the rotating shaft of stepper motor is connected with the central shaft of driving gear, and the center internal thread of follower gear and the external thread of screw rod are meshing with each other, and the lower end of screw rod is connected with weight by hang spring;
Mobile object, flexible sheet, horizontal wire drawing are connected successively with runner; Runner, backplate and weight are rigidly connected successively, constitute a pendulum architecture.
The utlity model has following advantage and good effect:
1, solved the influence of environmental factor to calibrated error;
2, displacement constant is constant;
3, adopt the step motor control weight to rise and fall, with the pantograph main frame perfect adaptation that the station is being used, adopt 12V direct current supply, transmit, use safer;
4, the data acquisition unit compatibility of using with the station need not made hardware and change, and writes number again and adopts internal program and can directly apply to the station;
5, the simple more and miniaturization of structure, requirement on machining accuracy is low, convenient transportation and installation;
Be applicable to the demarcation of pantograph.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: wherein:
0-mobile object, 1-flexible sheet, 2-diaphragm seat, 3-horizontal wire drawing,
4-backplate, 5-runner, 6-stepper motor, 7.1,7.2-upper and lower cover plate,
8-driving gear, 9-screw rod, 10-follower gear, 11-hang spring,
12-weight, 13-vertical rod, 14-base plate, 15-rotaring wheeling base.
Embodiment
Describe in detail below in conjunction with drawings and Examples:
One, the structure of this caliberating device
1, overall
As Fig. 1, this device comprises mobile object 0, flexible sheet 1, diaphragm seat 2, horizontal wire drawing 3, backplate 4, runner 5, stepper motor 6, upper cover plate 7.1, lower cover 7.2, driving gear 8, screw rod 9, follower gear 10, hang spring 11, weight 12, vertical rod 13, base plate 14 and rotaring wheeling base 15;
Its position and annexation are:
On base plate 14, from left to right, be respectively arranged with diaphragm seat 2, rotaring wheeling base 15 and vertical rod 13;
Diaphragm seat 2 is provided with flexible sheet 1;
Rotaring wheeling base 15 is provided with a stationary shaft, and the center pit of runner 5 is enclosed within on the stationary shaft;
Upper cover plate 7.1 and lower cover 7.2 connect into a support with vertical rod 13 respectively, upper cover plate 7.1 is provided with stepper motor 6, on lower cover 7.2, from left to right, be respectively arranged with intermeshing driving gear 8 and follower gear 10, the rotating shaft of stepper motor 6 is connected with the central shaft of driving gear 8, and the center internal thread of follower gear 10 and the external thread of screw rod 9 are meshing with each other, and the lower end of screw rod 9 is connected with weight 12 by hang spring 11;
Mobile object 0, flexible sheet 1, horizontal wire drawing 3 and runner 5 are connected successively; Runner 5, backplate 4 and weight 12 are rigidly connected successively, constitute a pendulum architecture.
Its principle of work is:
1. flexible sheet 1 is in indeformable state
By the control of stepper motor 6, make weight 12 be in a high position, this moment, hang spring 11 was in tension, and horizontal wire drawing 3 is in the state of not stressing, and flexible sheet 1 is in indeformable state, makes mobile object 0 not produce displacement.
2. flexible sheet is in deformation state
By the control of stepper motor 6, make weight 12 be in low level, this moment, hang spring 11 was in the state of not stressing, horizontal wire drawing 3 is in tension, flexible sheet 1 only is subjected to the gravity of weight 12 and backplate 4 make a concerted effort (this power is invariable), is in elastic deformation, makes mobile object 0 produce micrometric displacement.
3. because the gravity of weight 12 and backplate 4 invariable with joint efforts, so in each calibration process, the micrometric displacement amount of mobile object 0 is constant.
2, functional part
0) mobile object 0
Mobile object 0 is testee, is the iron core of pantograph sensor.
1) flexible sheet 1
Flexible sheet 1 is that a kind of thickness is the stainless steel substrates about 3mm, i.e. a kind of micro-displacement sensor, and its stressed micrometric displacement amount that produces is about 40 μ m in this device.
2) backplate 4
Backplate 4 is a kind of corrosion resistant plates, is rigidly connected with runner 5 and weight 12 respectively, constitutes a pendulum architecture; When weight 12 moves up and down, make runner 5 in small angle range, do clockwise direction or rotation counterclockwise.
3) hang spring 3
Hang spring 3 is a kind of stainless steel steel wires.
4) stepper motor 6
5) other functional part is part commonly used.
Two, operation instruction
During pantograph routine work state, weight 12 is in a high position, makes flexible sheet 1 be in the state of not stressing, and avoids flexible sheet 1 and horizontal wire drawing 3 long-time stressed generation inelastic deformations.
Three, experiment situation
By to stepper motor 6 rotatings control, realize the stepper motor workflow.Stepper motor 6 rotates 10 times totally, obtains 11 sensor output voltage values, thereby obtains 10 voltage differences.Each stepper motor 6 stops beginning reading behind the 60S after rotating and stopping, and guarantees that sensor is in steady state (SS).
Stepper motor workflow such as following table;
| Sequence number | 0 | Reading (motor is stablized reading before rotating) | Remarks: weight is in a high position |
| Sequence number | 1 | Just change 14 circles, stopping 60s, reading | Remarks: weight is in low level |
| Sequence number | 2 | Counter-rotating 14 circles stop 60s, reading | Remarks: weight is in a high |
| Sequence number | |||
| 3 | Just change 14 circles, stopping 60s, reading | Remarks: weight is in low level | |
| Sequence number | 4 | Counter-rotating 14 circles stop 60s, reading | Remarks: weight is in a high |
| Sequence number | |||
| 5 | Just change 14 circles, stopping 60s, reading | Remarks: weight is in low | |
| Sequence number | |||
| 6 | Counter-rotating 14 circles stop 60s, reading | Remarks: weight is in a high position | |
| Sequence number | 7 | Just change 14 circles, stopping 60s, reading | Remarks: weight is in low |
| Sequence number | |||
| 8 | Counter-rotating 14 circles stop 60s, reading | Remarks: weight is in a high position | |
| Sequence number | 9 | Just change 14 circles, stopping 60s, reading | Remarks: weight is in low |
| Sequence number | |||
| 10 | Counter-rotating 14 circles stop 60s, reading | Remarks: weight is in a high position |
Whole calibrating procedure is adopted register by the data computation number and is finished automatically, and calibration result is shown in calibration scale:
By calibration scale as can be seen, the demarcation repeatability of caliberating device is 0.09%, much smaller than 1% of standard-required.Through 5 groups of data tests, the demarcation repeatability of this caliberating device is respectively: 0.09%, 0.13%, 0.11%, 0.13%, 0.17%; Demarcating repeatability is stabilized in 2/1000ths.
This shows that this caliberating device adopts the calibration principle of elastic deformation to make its structure very simple and reliable, has solved a series of problems that existing caliberating device exists from root.Cost of manufacture reduces, can with existing data acquisition unit perfect adaptation, for the long deformation monitoring of pantograph provides good assurance.
Claims (1)
1. pantograph high precision membranes displacement calibrating device that declines is characterized in that:
Comprise mobile object (0), flexible sheet (1), diaphragm seat (2), horizontal wire drawing (3), backplate (4), runner (5), stepper motor (6), upper cover plate (7.1), lower cover (7.2), driving gear (8), screw rod (9), follower gear (10), hang spring (11), weight (12), vertical rod (13), base plate (14) and rotaring wheeling base (15);
Its position and annexation are:
On base plate (14), from left to right, be respectively arranged with diaphragm seat (2), rotaring wheeling base (15) and vertical rod (13);
Diaphragm seat (2) is provided with flexible sheet (1);
Rotaring wheeling base (15) is provided with a stationary shaft, and the center pit of runner (5) is enclosed within on the stationary shaft;
Upper cover plate (7.1) and lower cover (7.2) connect into a support with vertical rod (13) respectively, upper cover plate (7.1) is provided with stepper motor (6), on lower cover (7.2), from left to right, be respectively arranged with intermeshing driving gear (8) and follower gear (10), the rotating shaft of stepper motor (6) is connected with the central shaft of driving gear (8), the external thread of the center internal thread of follower gear (10) and screw rod (9) is meshing with each other, and the lower end of screw rod (9) is connected with weight (12) by hang spring (11);
Mobile object (0), flexible sheet (1), horizontal wire drawing (3) and runner (5) are connected successively; Runner (5), backplate (4) and weight (12) are rigidly connected successively, constitute a pendulum architecture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200509101U CN203177827U (en) | 2013-01-30 | 2013-01-30 | Extensometer high precision diaphragm micro-displacement calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200509101U CN203177827U (en) | 2013-01-30 | 2013-01-30 | Extensometer high precision diaphragm micro-displacement calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203177827U true CN203177827U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200509101U Expired - Lifetime CN203177827U (en) | 2013-01-30 | 2013-01-30 | Extensometer high precision diaphragm micro-displacement calibration device |
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| CN (1) | CN203177827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105150A (en) * | 2013-01-30 | 2013-05-15 | 中国地震局地震研究所 | High-accuracy diaphragm-type micrometric displacement calibration device of extensometer |
-
2013
- 2013-01-30 CN CN2013200509101U patent/CN203177827U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105150A (en) * | 2013-01-30 | 2013-05-15 | 中国地震局地震研究所 | High-accuracy diaphragm-type micrometric displacement calibration device of extensometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuhan earthquake Scientific Instrument Research Institute Assignor: INSTITUTE OF EARTHQUAKE, CHINA EARTHQUAKE ADMINISTRATION Contract record no.: 2014420000171 Denomination of utility model: Extensometer high precision diaphragm micro-displacement calibration device Granted publication date: 20130904 License type: Exclusive License Record date: 20140827 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |
|
| CX01 | Expiry of patent term |