CN203310412U

CN203310412U - GNSS (global navigation satellite system) observation pillar for reducing multipath effect

Info

Publication number: CN203310412U
Application number: CN2013203546969U
Authority: CN
Inventors: 聂兆生; 乔学军; 贾治革; 刘刚
Original assignee: Institute of Earthquake of China Earthquake Administration
Current assignee: Institute of Earthquake of China Earthquake Administration
Priority date: 2013-06-20
Filing date: 2013-06-20
Publication date: 2013-11-27
Anticipated expiration: 2023-06-20

Abstract

The utility model discloses a GNSS (global navigation satellite system) observation pillar for reducing the multipath effect, relating to an observation pillar. The observation pillar consists of a cushion layer (1), a foundation pillar (2), a main body observation pillar (3) and a forced centring mark (4) sequentially connected from bottom to top, wherein the cushion layer (1) is a concrete layer; the foundation pillar (2) is a square concrete pillar with a reinforcement cage inside; the main body observation pillar (3) is a cylindrical concrete pillar with a reinforcement cage inside, wherein the height of the cylinder is 1m, and the diameter is 0.38m. The utility model provides a stable, firm and low-noise GNSS (global navigation satellite system) observation base platform which is suitable for the technical field of national basic surveying and mapping, crustal movement monitoring, topographic mapping, road or building control and measurement and deformation monitoring of dams or other buildings.

Description

A kind of Global Positioning System (GPS) observation pier that reduces multipath effect

Technical field

The utility model relates to a kind of observation pier, relates in particular to a kind of Global Positioning System (GPS) observation pier that reduces multipath effect.This kind observation pier can be basis mapping, earth movement monitoring, topographic mapping, road or building control measurement, dam or the monitoring of other building deformations firm, reliable and low noise observation basic platform is provided.

Background technology

Current high-precision GNSS (Global Positioning System (GPS)) static observation pier commonly used (basement rock no matter, soil layer, or Continuous Observation base station, the mobile observation regional station) be generally square pier (length of side 50cm or other sizes) or circular pier (diameter 50cm or other sizes), its implementation process is (long under basement rock or soil layer environment, excavating certain size, wide, high size and project grade, it is relevant that environment etc. is built in choosing) foundation pit, then use reinforcing bar, high-grade concretes etc. are built into square ground foundation pier body, on ground, utilize again the square or circular body observation pier of template build given size, simultaneously stainless steel forced centering sign is imbedded to the pier body, sign top will flush with observation pier end face, during observation, the GNSS antenna is fixed on the observation pier by pedestal and forced centering connecting link.This kind GNSS observation pier is easy to use, working specification, keeping safety, (choking coil antenna diameter commonly used is 380mm but because tradition observation pier pier body cross-sectional diameter (more than being generally 500mm) is greater than the diameter of GNSS antenna, the zepher antenna diameter is less), while causing observing, multipath effect can obviously increase, and has affected to a great extent accuracy of observation.

Other provisional simple and easy GNSS observation platform (if imbed reinforcing bar or simple and easy observation monument on the platforms such as exposed bedrock, existing concrete structure temporarily) is although choosing is buried simple and conveniently, and precision is lower, observing environment is not easy to keeping, easily is damaged.

Summary of the invention

The utility model purpose is the shortcoming and defect existed for prior art, and firm, reliable and low noise a kind of Global Positioning System (GPS) observation pier (being called for short the observation pier) that reduces multipath effect is provided.

The utility model purpose is achieved in that

The utility model by the bed course connected successively from bottom to top, foundation pier, main body observation pier and forced centering sign form.

The utility model is compared with conventional art, has the following advantages and effect:

1. the utility model provides a kind of firm, reliable and low noise GNSS observation basic platform;

2. the more traditional GNSS observation of the utility model structure pier construction cost is lower, reduced labour intensity, improved work efficiency, the most important thing is when guaranteeing its stability, reduce the multipath effect in the observation process, obviously improved accuracy of observation and reliability.

3. be applicable to national basis mapping, earth movement monitoring, topographic mapping, road or building control measurement, dam or other building deformation monitoring technical field.

The accompanying drawing explanation

Fig. 1 is structural front view of the present utility model;

Fig. 2 is structure vertical view of the present utility model.

In figure:

0-underground soil layer;

1-bed course;

2-ground foundation pier;

3-main body observation pier;

4-forced centering sign.

Fig. 3 is the structural drawing (the main section of looking) that a kind of high precision is forced the centering observation device;

Fig. 4 is the structural drawing (overlooking) that a kind of high precision is forced the centering observation device.

In figure:

10-main body,

11-upper nahlock, 12-middle nahlock, 13-lower nahlock, 14-vertical spin hole,

15-flat spin hole;

20-over cap,

21-upper nahlocks, 22-lower cylinder, 23-grab hole;

30-adjusting screw(rod).

Embodiment

Below in conjunction with drawings and Examples, describe in detail:

One, structure

1, overall

As Fig. 1,2, the utility model by the bed course 1 connected successively from bottom to top, foundation pier 2, main body observation pier 3 and forced centering sign 4 form.

Working mechanism:

By building the observation pier be connected as a single entity with underground soil layer 0, and pre-buried centering mark processed (during observation, antenna being installed on the observation pier by this sign) therein, irregularly it is observed, obtain the information such as this area's crustal deformation.

2, functional part

1) bed course 1

Bed course 1 is concrete layer, and its concrete grade is C20～C25 as required.

2) foundation pier 2

Ground foundation pier 2 is a kind of square body concrete piers that are built-in with steel reinforcement cage; Steel reinforcement cage is tied up and is formed by screw-thread steel and round steel.

Main Function is for guaranteeing the stability of observation pier integral body.

3) main body observation pier 3

Main body observation pier 30 is a kind of right cylinder concrete piers that are built-in with steel reinforcement cage; Steel reinforcement cage is tied up and is formed by screw-thread steel and round steel.

The cylinder height is that 1m, diameter are 0.38m.

Main body observation pier 30 is exposed on the ground, need use pre-formwork supporting plate during construction, should be in strict accordance with requiring controlling dimension.

4) the forced centering sign 4

Forced centering sign 40 is the special-purpose centralising devices of a kind of stainless steel.

Select a kind of high precision to force centering observation device (separately declaring on the same day utility model patent).

As Fig. 3,4, a kind of high precision forces the centering observation device to be comprised of main body 10, over cap 20 and adjusting screw(rod) 30;

End face in main body 10 is connected with over cap 20, and the circumference in main body 10 bottoms is symmetrically connected with 4 adjusting screw(rod)s 30;

Described main body 10 is " work " font right cylinder, comprise nahlock 11, middle nahlock 12 and lower nahlock 13, at the end face center of upper nahlock 11, be provided with the vertical spin hole 14 with over cap 20 adaptations, on the circumference of lower nahlock 13, be symmetrically arranged with 4 flat spin holes 15 with adjusting screw(rod) 30 adaptations;

Described over cap 20 is " T " font right cylinder, comprises nahlock 21 and lower cylinder 22, on upper nahlock 21, is symmetrically arranged with 4 and grabs hole 23, and lower cylinder 22 is spiral fashion;

Described adjusting screw(rod) 30 is general part.

Two, specific implementation step

The specific implementation step is as follows:

1. according to the addressing standard reached its maturity at present, select suitable GNSS to observe pier site (soil layer, basement rock all can);

2. excavate foundation pit

Basement rock foundation pit: length * wide * height=0.64m * 0.64m * 0.5m;

Soil ground hole: length * wide * height=1.20m * 1.20m * 1.0m.

3. build bed course 10;

4. build ground foundation pier 20;

5. on ground foundation pier 20, utilize template (available stainless steel mould or disposable paper matrix) to build main body observation pier 30;

6. when building main body observation pier 30, forced centering sign 40 is imbedded in main body observation pier 30.

Install in the process of forced centering sign 40, regulate at any time its placed in the middle and horizontal situation with respect to observation pier end face, attractive in appearance with the accuracy of observation that guarantees the later stage and integral body.

Claims

1. a Global Positioning System (GPS) that reduces multipath effect is observed pier, it is characterized in that:

By the bed course (1) connected successively from bottom to top, foundation pier (2), main body observation pier (3) and forced centering sign (4) form.

2. by observation pier claimed in claim 1, it is characterized in that:

Described bed course (1) is a kind of concrete layer.

3. by observation pier claimed in claim 1, it is characterized in that:

Described ground foundation pier (2) is a kind of square body concrete pier that is built-in with steel reinforcement cage.

4. by observation pier claimed in claim 1, it is characterized in that:

Described main body observation pier (3) is a kind of right cylinder concrete pier that is built-in with steel reinforcement cage;

The cylinder height is 1m, and diameter is 0.38m.