CN211317328U - High-precision gyroscope for surveying and mapping engineering - Google Patents
High-precision gyroscope for surveying and mapping engineering Download PDFInfo
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- CN211317328U CN211317328U CN202020138220.1U CN202020138220U CN211317328U CN 211317328 U CN211317328 U CN 211317328U CN 202020138220 U CN202020138220 U CN 202020138220U CN 211317328 U CN211317328 U CN 211317328U
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Abstract
The utility model discloses a high-precision gyroscope for surveying and mapping engineering, the structure of which comprises a rotor, a universal coordinate system and a gyroscope frame, the utility model discloses a stable fixing device is arranged at the lower end of a base, firstly, a user firstly presses down telescopic rods at the left and right ends of a support plate to realize the fixing of the telescopic rods, then, the user can insert the gyroscope, after the insertion is completed, the user moves up the fixed telescopic rods to realize the fixing of the gyroscope base, thereby achieving the stable fixing of the gyroscope, preventing the gyroscope from influencing the surveying and mapping result due to the external environment, through arranging a reinforcing mechanism at the left side in an insertion groove, firstly, when the gyroscope is inserted, the left reinforcing block and the right reinforcing block are extruded towards the left and right ends, then when a connecting rod moves to the inside, a second compression spring can rebound to pull the two reinforcing blocks to achieve the clamping and fixing of the connecting rod, thereby reached the tight fixed of clamp to the connecting rod, further strengthened the advantage of stability when the gyroscope uses.
Description
Technical Field
The utility model relates to a high accuracy gyroscope technical field for the mapping engineering, concretely relates to high accuracy gyroscope for the mapping engineering.
Background
The gyroscope is an angular motion detection device which uses a momentum moment sensitive shell of a high-speed revolving body to rotate around one or two axes which are orthogonal to a rotation axis relative to an inertia space, the angular motion detection device manufactured by utilizing other principles has the same function and is also called a gyroscope, in surveying and mapping engineering, a high-precision gyroscope is generally required to be used for collecting topographic information and feeding the topographic information back to a computer, then a surveying and mapping engineer draws a topographic map and provides other information so as to carry out the work of decision, planning, design and the like, so that the surveying and mapping work is very important.
Present high accuracy gyroscope is when surveying and drawing, carries out the survey and drawing activity in undeveloped area usually, and because unevenness or soil that the road surface in undeveloped area is usually are comparatively lax to make placing of gyroscope difficult fixed, when leading to the gyroscope survey and drawing easily, the data of surveying and drawing are inaccurate, make the user can't make and carry out the data use.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to overcome prior art not enough, the present high accuracy gyroscope for mapping engineering that provides, when having solved and surveying the survey and drawing, carry out the survey and drawing activity in undeveloped area usually, and because unevenness or soil that the road surface in undeveloped area is usually are comparatively lax, thereby make placing of gyroscope difficult fixed, when leading to the gyroscope survey and drawing easily, the data of surveying and drawing is inaccurate, make the unable problem of carrying out the data use of messenger's user, reach the stable fixed to the gyroscope, prevent that the gyroscope from influencing the effect of surveying and drawing result because of external environment.
(II) technical scheme
The utility model discloses a following technical scheme realizes: the utility model provides a high-precision gyroscope for surveying and mapping engineering, which comprises a rotor, a universal coordinate system, a gyroscope frame, a connecting rod, a base and a stable fixing device, wherein the middle parts of the front and the rear ends of the rotor are connected with the universal coordinate system in an inserting way, the left and the right sides of the universal coordinate system are connected with the gyroscope frame in an inserting way, the lower end of the gyroscope frame is fixedly connected with the connecting rod through a bolt, the lower end of the connecting rod is fixedly welded with the base, the stable fixing device is arranged at the lower end of the base and consists of a fixed shell, an insertion groove, a supporting block, a supporting plate, a sliding groove, a fixed groove, a first spring groove, a first compression spring, a supporting plate moving groove, a telescopic rod, a pin shaft block, a limiting block, a pin shaft groove and a reinforcing mechanism, the upper end of the fixed shell is connected with the base in an, the supporting plate is arranged at the upper end inside the moving groove of the supporting plate, the left end and the right end of the supporting plate are both connected with the sliding groove and the fixed groove in a sliding way, the sliding grooves are arranged in the middle parts of the left end and the right end of the fixed shell, the fixed grooves are arranged at the left end and the right end of the movable groove of the supporting plate, the first spring groove is arranged at the lower end in the movable groove of the support plate, one end of the first compression spring is welded and fixed with the support plate, the other end of the first compression spring is welded and fixed with the first spring groove, the support plate moving groove is arranged at the middle end in the fixed shell, the left end of the telescopic rod is fixedly welded with the pin shaft block, the pin shaft block is arranged in the pin shaft groove, the limiting blocks are fixedly welded at the middle parts of the front end and the rear end of the right side of the pin shaft block, the pin shaft groove is arranged at the left end and the right end of the supporting plate, and the pin shaft groove is connected with the pin shaft block in a sliding manner, and the reinforcing mechanism is arranged on the left side inside the insertion groove.
Further, the reinforcing mechanism comprises a left reinforcing block, a right reinforcing block, a connecting block, a second compression spring, a second spring groove and a sliding block, the upper end of the left reinforcing block and the upper end of the right reinforcing block are fixedly connected through the second compression spring, the connecting block is arranged at the left end and the right end of the inner part of the second spring groove, the connecting block is welded and fixed at the left end and the right end of the inner part of the second spring groove, the second compression spring is arranged at the middle end of the inner part of the second spring groove, the second spring groove is respectively arranged at the left side of the upper end of the left reinforcing block and the left side of the upper end of the right reinforcing block, the lower end of the sliding block is respectively welded and fixed with the left reinforcing block and the.
Further, the supporting block is vertically welded to the lower end of the fixed shell, and the lower end of the supporting block is arranged to be in a spike shape.
Further, the middle part of the upper end of the support plate is provided with a damping layer, and the maximum sliding distance of the support plate along the support plate moving groove is 15 CM.
Further, eight first compression springs are equidistantly installed, and the maximum elastic force of the first compression springs is 20N.
Furthermore, the outer surface of the telescopic rod is provided with a soft rubber layer, and the soft rubber layer of the telescopic rod is provided with anti-skid grains.
Furthermore, the inner walls of the left reinforcing block and the right reinforcing block are arc-shaped, and rubber layers are adhered and fixed on the inner walls of the left reinforcing block and the right reinforcing block.
Further, the outer surface of the second compression spring is provided with a metal protective layer, and the second compression spring can perform rebound stretching of 10N.
Furthermore, the limiting block is made of stainless steel.
Furthermore, the first compression spring and the second compression spring are made of piano wire materials.
(III) advantageous effects
Compared with the prior art, the utility model, following beneficial effect has:
the method has the advantages that: the utility model discloses a high accuracy gyroscope for mapping engineering, through having set up stable fixing device at the base lower extreme, at first the user pushes down the telescopic link at both ends about the backup pad earlier, realizes the fixed of telescopic link, the user just can insert the gyroscope after that, inserts the completion back, the user shifts up at fixed telescopic link, realizes the fixed of gyroscope base to reached stable fixed to the gyroscope, prevented that the gyroscope from influencing mapping result's advantage because of external environment.
The method has the advantages that: the utility model discloses a high accuracy gyroscope for mapping engineering through having set up strengthening mechanism in the inside left side of insertion groove, can be at first when the gyroscope inserts with left reinforcement piece and right reinforcement piece to controlling both ends extrusion, then when the connecting rod removed inside, second compression spring can kick-back and stimulate two reinforcement pieces, reaches the clamp to the connecting rod and presss from both sides tightly fixed to the clamp of connecting rod has reached and has pressed from both sides tight fixed, has further strengthened the advantage of the stability when the gyroscope uses.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure of the insertion slot of the stabilizing fixture of the present invention;
FIG. 3 is a schematic view of the front cross-sectional structure of the stabilizing fixture of the present invention;
FIG. 4 is an enlarged schematic view of the fixing device A of the present invention;
fig. 5 is a schematic structural diagram of the reinforcing mechanism of the present invention.
In the figure: the gyroscope comprises a rotor-1, a universal coordinate system-2, a gyroscope frame-3, a connecting rod-4, a base-5, a stable fixing device-6, a fixing shell-61, an insertion groove-62, a supporting block-63, a supporting plate-64, a sliding groove-65, a fixing groove-66, a first spring groove-67, a first compression spring-68, a supporting plate moving groove-69, a telescopic rod-610, a pin block-611, a limiting block-612, a pin groove-613, a reinforcing mechanism-614, a left reinforcing block-6141, a right reinforcing block-6142, a connecting block-6143, a second compression spring-6144, a second spring groove-6145 and a sliding block-6146.
Detailed Description
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the present invention provides a high precision gyroscope for mapping engineering: the device comprises a rotor 1, a universal coordinate system 2, a gyroscope frame 3, a connecting rod 4, a base 5 and a stable fixing device 6, wherein the middle parts of the front end and the rear end of the rotor 1 are connected with the universal coordinate system 2 in an inserting way, the left side and the right side of the universal coordinate system 2 are connected with the gyroscope frame 3 in an inserting way, the lower end of the gyroscope frame 3 is connected and fixed with the connecting rod 4 through a bolt, the lower end of the connecting rod 4 is fixedly welded with the base 5, the stable fixing device 6 is arranged at the lower end of the base 5, the stable fixing device 6 comprises a fixed shell 61, an insertion groove 62, a supporting block 63, a supporting plate 64, a sliding groove 65, a fixing groove 66, a first spring groove 67, a first compression spring 68, a supporting plate moving groove 69, a telescopic rod 610, a pin shaft block 611, a limiting block 612, a pin shaft groove 613 and a reinforcing mechanism 614, the upper end of the, the support plate 64 is disposed at the upper end inside the support plate moving groove 69, and both the left and right ends of the support plate 64 are slidably connected to the sliding groove 65 and the fixing groove 66, the sliding groove 65 is opened at the middle of the left and right ends of the fixing housing 61, the fixing groove 66 is opened at both the left and right ends of the support plate moving groove 69, the first spring groove 67 is opened at the lower end inside the support plate moving groove 69, one end of the first compression spring 68 is welded and fixed to the support plate 64, and the other end of the first compression spring 68 is welded and fixed to the first spring groove 67, the support plate moving groove 69 is opened at the middle inside the fixing housing 61, the left end of the expansion link 610 is welded and fixed to the pin block 611, the pin block 611 is disposed inside the pin groove 613, the stopper 612 is welded and fixed to the middle of the front and rear ends of the right side of the pin block 611, the pin grooves 613, and be favorable to realizing the flexible activity of telescopic link 610, strengthening mechanism 614 sets up in the inside left side of insertion groove 62 to be favorable to realizing the fixed of connecting rod 4, prevent connecting rod 4 shake.
The reinforcing mechanism 614 is composed of a left reinforcing block 6141, a right reinforcing block 6142, a connecting block 6143, a second compression spring 6144, a second spring groove 6145 and a sliding block 6146, the upper ends of the left reinforcing block 6141 and the right reinforcing block 6142 are fixedly connected through the second compression spring 6144, the connecting block 6143 is arranged at the left end and the right end inside the second spring groove 6145, the connecting block 6143 is fixedly welded with the left end and the right end of the second compression spring 6144, the second compression spring 6144 is arranged at the middle end inside the second spring groove 6145, the second spring groove 6145 is respectively arranged on the right side of the upper end of the left reinforcing block 6141 and on the left side of the upper end of the right reinforcing block 6142, the lower end of the sliding block 6146 is fixedly welded with the left reinforcing block 6141 and the right reinforcing block 6142, and the upper end of the sliding block 6146 is connected with the fixed shell.
Wherein, the supporting block 63 is vertically welded to the lower end of the fixed casing 61, and the lower end of the supporting block 63 is provided with a spike shape, so that the supporting block can be better placed.
Wherein, the middle part of the upper end of the supporting plate 64 is provided with a shock absorbing layer, and the maximum sliding distance of the supporting plate 64 along the supporting plate moving groove 69 is 15CM, so that the gyroscope is further stable when in use.
Eight first compression springs 68 are equidistantly arranged, and the maximum elastic force of the first compression springs 68 is 20N, so that the fixation stability of the gyroscope base 5 is increased.
Wherein, the outer surface of the telescopic rod 610 is provided with a soft rubber layer, and the soft rubber layer of the telescopic rod 610 is provided with anti-slip grains, so that a user is not easy to take off his hands when using the device.
The inner walls of the left reinforcing block 6141 and the right reinforcing block 6142 are arc-shaped, and rubber layers are adhered and fixed on the inner walls of the left reinforcing block 6141 and the right reinforcing block 6142, so that the connecting rod 4 can be better clamped and fixed.
Wherein, the outer surface of the second compression spring 6144 is provided with a metal protective layer, and the second compression spring 6144 can perform rebound stretching of 10N, so that the second compression spring 6144 can be used for a long time.
The limiting block 612 is made of stainless steel.
The first compression spring 68 and the second compression spring 6144 are made of piano wire materials.
This patent stopper 612: the limiting block is an iron block for limiting the position, is fixed at the relevant part of the machine tool by a screw, controls the stroke, and is fixed, adjustable, different in machine tools and different in the placement position of the limiting block; the first compression spring 68 and the second compression spring 6144: the spring is a spiral spring bearing pressure, the section of the material used by the spring is mostly circular, and the spring is also rolled by rectangular and multi-strand steel ropes, the spring is generally equidistant, and the shape of the compression spring is as follows: the compression spring is cylindrical, conical, convex and concave, and a small number of non-circular shapes, and the like, a certain gap is reserved between the rings of the compression spring, and the compression spring contracts and deforms when subjected to external load, so that deformation energy is stored.
The utility model relates to a high-precision gyroscope information safety paper smashing device for mapping engineering, which has the following working principle;
firstly, when a user wants to use the gyroscope, the gyroscope is stably placed at a position to be detected, then the universal coordinate system 2 and the gyroscope frame 3 are driven by the rotor 1 in the gyroscope to sequentially rotate along with the gyroscope, and then the user can observe the topographic condition of the mapped position through the rotation positions of the universal coordinate system 2 and the gyroscope frame 3;
secondly, when the current gyroscope is used for surveying and mapping, surveying and mapping activities of undeveloped areas are usually carried out, but because the road surface of the undeveloped area is usually uneven or soil is loose, the gyroscope is not easy to be placed and fixed, and when the gyroscope is used for surveying and mapping, the surveyed data is inaccurate, so that a user cannot use the data, and therefore, in order to fix the gyroscope and achieve the stability of detection, the gyroscope is fixed by arranging the stable fixing device 6 at the lower end of the base 5;
thirdly, firstly, a user firstly stretches the telescopic rods 610 at the left end and the right end of the supporting plate 64, then presses the telescopic rods 610 downwards to enable the telescopic rods 610 to move downwards to the fixing grooves 66, and then restores the stretched telescopic rods 610 to the original state again, so that the telescopic rods 610 are fixedly connected with the fixing grooves 66, then an insertion groove originally closed by the supporting plate 64 can be opened, and then the user can insert the gyroscope base along the insertion groove 62, and after the insertion is finished;
fourthly, the user can move the expansion link 610 fixed to the fixing groove 66 upward, and the pulling of the expansion link 610 can be stopped by moving to the sliding groove 65, then, the support plate 63 is pressed to a position contacting with the gyro base 5 by the elastic force of the first compression spring 68 inside the support plate moving groove 69, and because the elastic force of the first compression spring 68 is large, thereby increasing the contact force between the support plate 63 and the gyroscope base 5, and simultaneously pressing the gyroscope base 5 to contact with the top of the support plate moving groove 63, after the gyroscope placement is then complete, the user can place the stationary housing 61 to the location to be mapped, and because the lower end of the supporting block 63 at the bottom of the fixed casing 61 is arranged to be sharp, the fixed casing 61 is stably placed, therefore, the gyroscope is stably fixed, and the gyroscope is prevented from influencing a mapping result due to an external environment;
fifthly, in order to further enhance the fixation of the gyroscope, by providing the reinforcing mechanism 614 on the left side inside the insertion slot 62, firstly when the connecting rod 4 slides to the left end of the insertion slot 62, the left reinforcing block 6141 and the right reinforcing block 6142 are pressed towards the left and right ends, and when the left reinforcing block 6141 and the right reinforcing block 6142 move towards the left and right ends, the second compression spring 6144 inside the second spring slot 6145 is stretched, and then when the connecting rod 4 moves to the arc part inside the left reinforcing block 6141 and the right reinforcing block 6142, the second compression spring 6144 reduces a certain stretching force, so that the left reinforcing block 6141 and the right reinforcing block 6142 are pulled to achieve the clamping fixation of the connecting rod 4, thereby achieving the clamping fixation of the connecting rod 4, and further enhancing the advantage of the stability of the gyroscope in use.
The basic principle and the main characteristics of the utility model and the advantages of the utility model have been shown and described above, and the utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the record of the description with the drawing, and the concrete connection mode of each part all adopts conventional means such as ripe bolt rivet among the prior art, welding, and machinery, part and equipment all adopt prior art, conventional model, and conventional connection mode in the prior art is adopted in addition to circuit connection, and the details are not repeated here.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A high-precision gyroscope for surveying and mapping engineering comprises a rotor (1), a universal coordinate system (2), a gyroscope frame (3), a connecting rod (4) and a base (5), wherein the middle parts of the front end and the rear end of the rotor (1) are connected with the universal coordinate system (2) in an inserting manner, the left side and the right side of the universal coordinate system (2) are connected with the gyroscope frame (3) in an inserting manner, the lower end of the gyroscope frame (3) is fixedly connected with the connecting rod (4) through a bolt, and the lower end of the connecting rod (4) is fixedly welded with the base (5);
the method is characterized in that: the device is characterized by further comprising a stable fixing device (6), the stable fixing device (6) is installed at the lower end of the base (5), the stable fixing device (6) is composed of a fixing shell (61), an insertion groove (62), a supporting block (63), a supporting plate (64), a sliding groove (65), a fixing groove (66), a first spring groove (67), a first compression spring (68), a supporting plate moving groove (69), an expansion rod (610), a pin shaft block (611), a limiting block (612), a pin shaft groove (613) and a reinforcing mechanism (614), the upper end of the fixing shell (61) is connected with the base (5) in an insertion mode, the insertion groove (62) is formed in the right side of the upper end of the fixing shell (61), the supporting block (63) is fixedly welded at the bottom of the fixing shell (61), the supporting plate (64) is arranged at the upper end inside the supporting plate moving groove (69), and the left end and the right end of the supporting plate (64), the sliding groove (65) is arranged in the middle of the left end and the right end of the fixed shell (61), the fixed groove (66) is arranged at the left end and the right end of the support plate moving groove (69), the first spring groove (67) is arranged at the lower end in the support plate moving groove (69), one end of the first compression spring (68) is welded and fixed with the support plate (64), the other end of the first compression spring (68) is welded and fixed with the first spring groove (67), the support plate moving groove (69) is arranged at the middle end in the fixed shell (61), the left end of the telescopic rod (610) is welded and fixed with the pin shaft block (611), the pin shaft block (611) is arranged in the pin shaft groove (613), the limit block (612) is welded and fixed in the middle of the front end and the rear end of the right side of the pin shaft block (611), the pin shaft groove (613) is arranged at the left end and the right end of the support plate (64), and the pin shaft groove (613) is connected, the reinforcing mechanism (614) is arranged on the left side inside the insertion groove (62).
2. The high-precision gyroscope for mapping engineering according to claim 1, characterized in that: the reinforcing mechanism (614) consists of a left reinforcing block (6141), a right reinforcing block (6142), a connecting block (6143), a second compression spring (6144), a second spring groove (6145) and a sliding block (6146), the upper ends of the left reinforcing block (6141) and the right reinforcing block (6142) are fixedly connected through a second compression spring (6144), the connecting blocks (6143) are arranged at the left end and the right end inside the second spring groove (6145), the connecting block (6143) and the second compression spring (6144) are welded and fixed at the left and the right, the second compression spring (6144) is arranged at the middle end in the second spring groove (6145), the second spring groove (6145) is respectively arranged on the right side of the upper end of the left reinforcing block (6141) and the left side of the upper end of the right reinforcing block (6142), the lower end of the sliding block (6146) is respectively welded and fixed with the left reinforcing block (6141) and the right reinforcing block (6142), and the upper end of the sliding block (6146) is connected with the fixed shell (61) in an inserting mode.
3. The high-precision gyroscope for mapping engineering according to claim 1, characterized in that: the supporting block (63) is vertically welded at the lower end of the fixed shell (61), and the lower end of the supporting block (63) is arranged to be in a sharp-pointed shape.
4. The high-precision gyroscope for mapping engineering according to claim 1, characterized in that: the middle part of the upper end of the support plate (64) is provided with a shock absorption layer, and the maximum sliding distance of the support plate (64) along the support plate moving groove (69) is 15 CM.
5. The high-precision gyroscope for mapping engineering according to claim 1, characterized in that: eight first compression springs (68) are equidistantly arranged, and the maximum elastic force of the first compression springs (68) is 20N.
6. The high-precision gyroscope for mapping engineering according to claim 1, characterized in that: the outer surface of the telescopic rod (610) is provided with a soft rubber layer, and the soft rubber layer of the telescopic rod (610) is provided with anti-skid grains.
7. The high-precision gyroscope for mapping engineering according to claim 2, characterized in that: the inner walls of the left reinforcing block (6141) and the right reinforcing block (6142) are arc-shaped, and rubber layers are adhered and fixed on the inner walls of the left reinforcing block (6141) and the right reinforcing block (6142).
8. The high-precision gyroscope for mapping engineering according to claim 2, characterized in that: the outer surface of the second compression spring (6144) is provided with a metal protective layer, and the second compression spring (6144) can perform rebound stretching of 10N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020138220.1U CN211317328U (en) | 2020-01-21 | 2020-01-21 | High-precision gyroscope for surveying and mapping engineering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020138220.1U CN211317328U (en) | 2020-01-21 | 2020-01-21 | High-precision gyroscope for surveying and mapping engineering |
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| Publication Number | Publication Date |
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| CN211317328U true CN211317328U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020138220.1U Expired - Fee Related CN211317328U (en) | 2020-01-21 | 2020-01-21 | High-precision gyroscope for surveying and mapping engineering |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114152248A (en) * | 2021-12-08 | 2022-03-08 | 无锡凌云创兴智能技术有限公司 | Anti-swing device for travelling crane |
| CN117268359A (en) * | 2023-11-17 | 2023-12-22 | 深圳市金众工程检验检测有限公司 | High-precision gyroscope for surveying and mapping |
-
2020
- 2020-01-21 CN CN202020138220.1U patent/CN211317328U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114152248A (en) * | 2021-12-08 | 2022-03-08 | 无锡凌云创兴智能技术有限公司 | Anti-swing device for travelling crane |
| CN117268359A (en) * | 2023-11-17 | 2023-12-22 | 深圳市金众工程检验检测有限公司 | High-precision gyroscope for surveying and mapping |
| CN117268359B (en) * | 2023-11-17 | 2024-01-26 | 深圳市金众工程检验检测有限公司 | High-precision gyroscope for surveying and mapping |
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