CN115014312A

CN115014312A - Compass and compass bird

Info

Publication number: CN115014312A
Application number: CN202210545831.1A
Authority: CN
Inventors: 井中武; 王振波; 李政琨; 韩艺; 李汶轩; 阮福明
Original assignee: China Oilfield Services Ltd
Current assignee: China Oilfield Services Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-09-06

Abstract

The invention relates to the technical field of oil exploration, in particular to a compass and a compass bird, wherein the compass comprises: detection device, support frame and protective housing, detection device set up on the support frame, and at least part support frame sets up in the protective housing, presss from both sides between support frame and the protective housing and is equipped with first sealing washer, and the lateral wall cover of protective housing is equipped with the second sealing washer, and the second sealing washer is used for with the shells inner wall butt of compass bird to with protective housing seal installation in the shells of compass bird. Through the mode, the problem that the compass vibrates due to the influence of the external environment and the measurement accuracy is influenced is solved.

Description

Compass and compass bird

Technical Field

The invention belongs to the field of petroleum exploration, and particularly relates to a compass and a compass bird.

Background

A compass bird is an indispensable device in a marine seismic exploration streamer acquisition system and is mainly used for controlling the depth of a cable and measuring the heading of the cable.

The compass is a core component of the compass bird, is arranged at the tail of the compass bird and is mainly used for measuring the heading of the cable. Because the electronic compass needs to be applied to the underwater compass bird, the compass bird is in a dynamic change process, and the compass bird may vibrate due to an external environment, so that the accuracy of compass measurement data is affected, the existing electronic compass is difficult to be directly applied to the underwater compass bird.

Disclosure of Invention

In order to solve the problems, the invention provides a compass and a compass bird, and solves the problem that the compass vibrates due to the influence of an external environment and the measurement accuracy is influenced.

According to one aspect of the present invention, there is provided a compass for a compass bird, comprising: the detection device is arranged on the support frame, at least part of the support frame is arranged in the protective shell, a first sealing ring is clamped between the support frame and the protective shell, a second sealing ring is sleeved on the side wall of the protective shell and used for being abutted against the inner wall of the housing of the compass bird, and the protective shell is arranged in the housing of the compass bird in a sealing mode.

Through pressing from both sides between support frame and protective housing and establishing first sealing washer, the second sealing washer is established to the cover between protective housing and the casing of compass bird for the inside double-deck shock-absorbing structure that forms of compass when guaranteeing the leakproofness, has reduced because the vibration of compass bird causes the compass to measure the problem that the deviation appears.

In some embodiments, the protective shell is a cylindrical structure with an opening at one end, and the support frame is inserted into the protective shell through the opening in a sealing manner. The underwater resistance of the cylindrical structure is small, so that the stress is favorably applied, and the protective shell is arranged to be cylindrical, so that the stress on the protective shell is uniformly distributed through the smooth curved surface of the side wall of the protective shell. After the support frame is inserted in the protective housing through the opening seal, detection device on the support frame is in sealed protective housing, when external force acts on the protective housing, the protective housing can better provide protection for the detection device of inside, when external force acts on the protective housing, the protective housing is difficult to damage inside detection device because of the atress takes place to deform.

In some embodiments, the supporting frame is provided with a first groove, and the first sealing ring is sleeved in the first groove. Through setting up first sealing washer in first recess for on first sealing washer reliably is fixed in the support frame, when first sealing washer assembles along with the support frame inserts in the protective housing, can effectively fix the position of first sealing washer through first recess, first sealing washer can not slide, can seal the detection device in the protective housing according to preset position, and provide better shock attenuation performance.

In some embodiments, the support frame includes an installation portion and a sealing portion, the detection device is disposed on the installation portion, the sealing portion is disposed at two ends of the installation portion, and the sealing portions at two ends of the installation portion are both sleeved with the first sealing ring, so that when the support frame is inserted into the protective shell, the periphery of the first sealing ring is in butt fit with the inner wall of the protective shell. Through setting up first sealing washer at the sealing both ends, make when the support frame inserts in the protective housing, first sealing washer on the support frame and protective housing inner wall looks butt, guaranteed that the axis of support frame and the axis of protective housing can not take place relative skew at the support frame inserts protective housing in-process, thereby guarantee that the axis of the two coincides or is parallel each other, and back in the support frame inserts the protective housing, because the first sealing washer at support frame both ends makes the support frame can not take place axial skew in the protective housing with the butt of protective housing inner wall (promptly the axis of support frame can not take place the slope for the axis of protective housing), and then guaranteed that the deviation can not appear in detection device's the horizontal angle who sets up on the installation department, avoid proofreading and correct the work to detection device, the work load in the installation has been reduced.

In some embodiments, an end cover is arranged at one end of the support frame, and the end cover covers the opening. Through setting up the end cover for when the end cover lid fits the opening part, sealing connection between end cover and the protective housing, its inside detection device of protection can not invaded by outside liquid, and the degree of depth in the protective housing can the control support frame entering protective housing to the end cover, the installation and the dismantlement of the support frame of being convenient for.

In some embodiments, the end cap is provided with a through hole, a sealing plug is arranged in the through hole, a first annular groove is arranged on the side wall of the sealing plug facing the through hole, and a sealing ring is arranged in the first annular groove and abuts against the inner wall of the through hole. Through set up the sealing plug in the through-hole to set up the sealing ring in the sealing plug periphery, make the sealing plug can be more firm sealed through-hole, promote the sealing performance of sealing plug to the through-hole, make detection device in the protective housing can normally work and not damaged by outside liquid.

In some embodiments, a wire passage is formed in the sealing plug, the wire passage is used for accommodating a wire, an end face of the sealing plug is provided with a glue injection groove communicated with the wire passage, and the glue injection groove is used for injecting a sealant so as to seal the wire passage. The wire of the detection device in the protective shell can be extended out of the sealing plug through the wire channel and is electrically connected with the compass bird for data transmission, and the sealant is poured into the glue injection groove, so that the gap between the wire and the wire channel and at least one end of the wire channel are sufficiently sealed, the inner space of the protective shell is isolated from the outside, and the detection device in the protective shell is protected from being damaged by external liquid.

In some embodiments, the inner wall of the through hole is provided with a second annular groove, a clamp spring is clamped in the second annular groove, and the clamp spring abuts against one end of the sealing plug so as to fix the sealing plug in the through hole. Through setting up second annular groove at the through-hole inner wall to through with jump ring joint in second annular groove and butt in the one end of sealing plug, the restriction sealing plug outwards removes, and then makes the sealing plug fix in the through-hole steadily, prevents to break away from and then pull the inside wire of protective housing because external force pulls outside wire and makes the sealing plug break away from in the through-hole, damages the stability that the inside wire of protective housing is connected with detection device.

In some embodiments, the detection device includes a controller, a three-axis gyroscope, a three-axis accelerometer, and a three-axis micro-magnetic sensor, each of which is electrically connected to the controller. The controller, the three-axis gyroscope, the three-axis accelerometer and the three-axis micro-magnetic sensor are arranged on the mounting portion, so that navigation information can be accurately calculated in an underwater dynamic change environment of the compass, and accurate heading detection is facilitated.

According to another aspect of the present invention, there is provided a compass bird comprising a housing, a compass according to the above embodiments being disposed within the housing.

According to the compass bird, the first sealing ring is arranged between the supporting frame and the protective shell, and the second sealing ring is sleeved on the side wall of the protective shell, so that when the compass is installed on the shell of the compass bird, the compass and the shell of the compass bird form a double-layer sealing shock absorption structure, the problem of compass measurement deviation caused by external shock is avoided, and the waterproof performance of the compass is further improved due to double-layer sealing.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a compass according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural diagram of a compass provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a support frame in a compass according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a protective shell in a compass, according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 2 at A;

fig. 6 is a schematic view of a sealing plug in a compass according to an embodiment of the present invention;

fig. 7 is a schematic view of another perspective structure of a sealing plug in a compass, according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a circlip in a compass according to an embodiment of the present invention.

Compass 100, support frame 110, installation portion 111, mounting bracket 111a, sealing portion 112, protective housing 120, second sealing ring 121, second recess 122, opening 123, first sealing ring 130, first recess 140, end cover 150, through-hole 151, second annular groove 152, jump ring 153, sealing plug 160, first annular groove 161, sealing ring 162, wire passageway 163, injecting glue groove 164.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures, are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present invention, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, specific order, or primary-secondary relationship of the technical features indicated.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiment of the present invention, the term "and/or" is only one kind of association relationship describing the association object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present invention, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two sets), "plural pieces" refers to two or more (including two pieces).

In the description of the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientations and positional relationships indicated in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

A compass bird is an indispensable device in a marine seismic exploration streamer acquisition system and is mainly used for controlling the depth of a cable and measuring the heading of the cable. The compass is a core component of the compass bird, is arranged at the tail of the compass bird and is mainly used for measuring the heading of the cable. The compass precision requirement that the compass bird made in China used at present is 0.5 degrees, and resolution requirement is 0.1 degrees, because electron compass need be applied in the compass bird under water, and the compass bird is in the process of dynamic change, the compass easily receives the vibration and then influences the measuring effect to current electron compass is difficult direct application in the compass bird under water.

Based on the above problems, the invention provides a compass for compass birds, wherein a first sealing ring is clamped between a support frame and a protective shell inside the compass, and a second sealing ring is sleeved on the side wall of the protective shell, so that a double-layer sealing shock-absorbing structure is formed when the protective shell is hermetically mounted on a compass bird shell, gaps between the support frame and the protective shell and between the protective shell and the compass bird shell are reduced, the influence caused by vibration is relieved by the support of the first sealing ring and the second sealing ring, and meanwhile, the waterproof effect is improved.

According to an aspect of the present invention, a compass is provided, and specifically refer to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a compass according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional structural diagram of a compass according to an embodiment of the present invention. The compass 100 includes: the protection device comprises a detection device (not shown in the figure), a support frame 110 and a protection shell 120, wherein the detection device is arranged on the support frame 110, at least part of the support frame 110 is arranged in the protection shell 120, a first sealing ring 130 is clamped between the support frame 110 and the protection shell 120, a second sealing ring 121 is sleeved on the side wall of the protection shell 120, and the second sealing ring 121 is used for being abutted against the inner wall of the shell of the compass bird so as to install the protection shell 120 in the shell of the compass bird in a sealing manner.

Referring to fig. 2, and with further reference to fig. 3, fig. 3 is a schematic structural diagram of a support frame in a compass according to an embodiment of the present invention. The supporting frame 110 is used for fixing the detection device, the detection device may include a circuit module and a sensor, so as to measure the course of the compass bird, the supporting frame 110 is disposed in the protective shell 120, the first sealing ring 130 is clamped between the supporting frame 110 and the protective shell 120, so as to seal the space inside the protective shell 120 through the first sealing ring 130, the first sealing ring 130 has elasticity, so that an elastic buffer is formed between the supporting frame 110 and the protective shell 120, the conduction of vibration is reduced, and a damping effect is achieved.

The second sealing ring 121 is sleeved on the side wall of the protective shell 120, the second sealing ring 121 abuts against the inner wall of the housing of the compass bird, so that the protective shell 120 and the housing of the compass bird are sealed through the second sealing ring 121, and the second sealing ring 121 is elastic, so that elastic buffering is formed between the protective shell 120 and the housing of the compass bird, and a double-layer damping effect is achieved. Specifically, the first seal ring 130 and the second seal ring 121 may be O-ring seals.

Through pressing from both sides between support frame 110 and protective housing 120 and establishing first sealing washer 130, establish second sealing washer 121 between protective housing 120 and the casing of compass bird for compass 100 is inside to form double-deck shock-absorbing structure, when guaranteeing the leakproofness, has reduced because compass 100 measures the problem that the deviation appears in the vibration of compass bird causes.

Referring to fig. 4, fig. 4 is a schematic structural view of a protective shell 120 in the compass 100 according to an embodiment of the present invention, in some embodiments, the protective shell 120 is a cylindrical structure with an opening 123 at one end, and the supporting frame 110 is inserted into the protective shell 120 through the opening 123 in a sealing manner.

After the supporting frame 110 is inserted into the protective casing 120, a sealing device such as a sealing ring may be disposed on a position of the supporting frame 110 opposite to the inner wall of the opening 123, and the sealing device abuts against the inner wall of the protective casing 120 to form a sealing insertion connection, so that the inner space of the protective casing 120 is in a sealing state.

The cylindrical structure has a small underwater resistance, which is beneficial to stress, so that the protective shell 120 is set to be cylindrical, and stress on the protective shell 120 is uniformly distributed through the smooth curved surface of the side wall of the protective shell 120. After the supporting frame 110 is inserted into the protective shell 120 through the opening 123, the detection device on the supporting frame 110 is in the sealed protective shell 120, and when an external force acts on the protective shell 120, the protective shell 120 can better protect the detection device inside, so that the protective shell 120 is not easy to damage the detection device inside due to deformation caused by stress.

Referring to fig. 3 again, in some embodiments, the supporting frame 110 is provided with a first groove 140, and the first sealing ring 130 is sleeved in the first groove 140.

Through setting up first sealing washer 130 in first recess 140 for first sealing washer 130 is reliably fixed in on support frame 110, when first sealing washer 130 assembles along with support frame 110 inserts in protective housing 120, can effectively fix the position of first sealing washer 130 through first recess 140, and first sealing washer 130 can not slide, thereby can seal the detection device in protective housing 120 according to predetermined position, can promote the shock attenuation performance between support frame 110 and the protective housing 120 simultaneously.

Referring to fig. 3, in some embodiments, the supporting frame 110 includes an installation portion 111 and a sealing portion 112, the detecting device is disposed on the installation portion 111, the sealing portions 112 are disposed at two ends of the installation portion 111, and the sealing portions 112 at two ends of the installation portion 111 are sleeved with the first sealing ring 130, so that when the supporting frame 110 is inserted into the protecting shell 120, an outer circumference of the first sealing ring 130 is abutted against an inner wall of the protecting shell 120.

As shown in fig. 3, the mounting portion 111 may be a square box with an open side, mounting brackets 111a are disposed at four corners of the mounting portion 111, the mounting brackets 111a may fix detection devices such as sensors by way of screw connection or clamping, the inside of the mounting portion 111 is used for accommodating and fixing a circuit board, and the length and width of one surface of the mounting portion 111 abutting against the sealing portion 112 may be matched with the radial dimension of the sealing portion 112 to provide a sufficient accommodating space for the detection device.

The sealing portion 112 may be a cylindrical structure, and the sealing portion 112 and the mounting portion 111 may be integrally formed, and may also be fixedly connected through a threaded connection piece, an outer diameter of the sealing portion 112 matches an inner diameter of the protective case 120, the first groove 140 may be disposed on a sidewall of the sealing portion 112, and the first sealing ring 130 is disposed in the first groove 140, so that when the support frame 110 is inserted into the protective case 120, peripheries of the first sealing rings 130 on the sealing portions 112 at two ends abut against an inner wall of the protective case 120, after the support frame 110 is completely inserted into the protective case 120, because the first sealing rings 130 are disposed on the sealing portions 112 at two ends, two ends of the mounting portion 111 are stably stressed, and further, when the compass 100 works, the axis of the support frame 110 and the axis of the protective case 120 are not deviated due to vibration.

Similarly, please refer to fig. 1 again, the two ends of the protection shell 120 may also be provided with second grooves 122, and the second sealing rings 121 are respectively disposed in the second grooves 122 at the two ends of the protection shell 120, so that when the compass 100 is inserted into the housing of the compass bird, the two ends of the compass 100 are stressed stably, and the axis of the compass 100 and the axis of the housing of the compass bird are not deviated due to the influence of vibration, thereby ensuring the accuracy of detection of the compass 100.

By providing the first sealing rings 130 at both ends of the sealing part 112, when the supporter 110 is inserted into the protective case 120, the first sealing ring 130 on the supporting frame 110 abuts against the inner wall of the protective shell 120, so that the axial line of the supporting frame 110 and the axial line of the protective shell 120 cannot be relatively deviated in the process of inserting the supporting frame 110 into the protective shell 120, thereby ensuring that the axes of the two are coincident or parallel to each other, and after the support bracket 110 is inserted into the protective shell 120, since the first sealing rings 130 at the two ends of the supporting frame 110 abut against the inner wall of the protecting shell, the supporting frame 110 cannot be axially displaced in the protecting shell 120 (i.e. the axis of the supporting frame 110 cannot be inclined with respect to the axis of the protecting shell 120), and then guaranteed that the horizontal angle of the detection device who sets up on installation department 111 can not the deviation appear, avoided carrying out calibration work to detection device, reduced the work load in the installation.

Referring to fig. 3 and 4, in some embodiments, an end cap 150 is disposed at one end of the supporting frame 110, and the end cap 150 covers the opening 123.

The end cap 150 may be an integral structure with the support frame 110, and the diameter of the end cap 150 may be larger than that of the support frame 110, so that after the support frame 110 is inserted into the protective shell 120, the end cap 150 abuts against one end of the protective shell 120 to play a positioning role in the insertion assembly of the support frame 110. And the diameter of the end cap 150 may match the diameter of the protective shell 120, so that the surface of the support frame 110 is flat after being inserted into the protective shell 120, and an airtight space may be formed between the end cap 150 and the protective shell 120 to protect the detection device therein.

By arranging the end cover 150, when the end cover 150 covers the opening 123, the end cover 150 is hermetically connected with the protective shell 120, so that the detection device inside the protective shell is protected from being invaded by external liquid, and the end cover 150 can control the depth of the support frame 110 entering the protective shell 120, thereby facilitating the installation and the disassembly of the support frame 110.

Referring to fig. 5, fig. 5 is a partial enlarged view of fig. 2 at a, in some embodiments, a through hole 151 is formed in the end cap 150, a sealing plug 160 is disposed in the through hole 151, a first annular groove 161 is formed in a side wall of the sealing plug 160 facing the through hole 151, a sealing ring 162 is disposed in the first annular groove 161, and the sealing ring 162 abuts against an inner wall of the through hole 151.

Through set up sealing plug 160 in through-hole 151 to set up sealing ring 162 in sealing plug 160 periphery for sealing plug 160 can be more firm sealed through-hole 151, promotes sealing plug 160 to the sealing performance of through-hole 151, makes the detection device in the protective housing 120 can normally work and not damaged by outside liquid.

Referring to fig. 6 and fig. 7, fig. 6 is a schematic view of a sealing plug 160 in the compass 100 according to an embodiment of the present invention, and fig. 7 is a schematic view of another sealing plug 160 in the compass 100 according to an embodiment of the present invention. In some embodiments, a wire passage 163 is formed in the sealing plug 160, the wire passage 163 is used for accommodating a wire, at least one end surface of the sealing plug 160 is provided with a glue injection groove 164 communicated with the wire passage 163, and the glue injection groove 164 is used for injecting a sealing glue to seal the wire passage 163.

Through setting up wire passageway 163 for the detection device's in the protective housing 120 wire can stretch out and be connected in order to carry out data transmission between the compass bird from the sealing plug 160, through pouring sealant into glue injection groove 164, make the space between wire and the wire passageway 163 and at least one end of wire passageway 163 fully sealed, thereby keep apart the protective housing 120 inner space with the outside, ensure that the detection device in the protective housing 120 can not damaged by outside liquid.

Referring to fig. 5 again, in some embodiments, the inner wall of the through hole 151 is provided with a second annular groove 152, a clamp spring 153 is clamped in the second annular groove 152, and the clamp spring 153 abuts against one end of the sealing plug 160 to fix the sealing plug 160 in the through hole 151.

Specifically, referring to fig. 8, fig. 8 is a schematic structural diagram of a snap spring 153 in the compass 100 according to the embodiment of the present invention. The clamp spring 153 may be a C-shaped plate clamp spring or a wire clamp spring, and after the sealing plug 160 is disposed in the through hole 151, the clamp spring 153 is installed in the second annular groove 152, and the sealing plug 160 is fixed in the through hole 151 by the clamp spring 153 abutting against one end of the sealing plug 160.

Set up second annular groove 152 at through-hole 151 inner wall to through with jump ring 153 joint in second annular groove 152 and butt in the one end of sealing plug 160, restriction sealing plug 160 outwards removes, and then make sealing plug 160 fix in through-hole 151 steadily, prevent to pull outside wire and make sealing plug 160 break away from and then pull the inside wire of protective housing 120 from through-hole 151 because external force, damage the stability that the inside wire of protective housing 120 is connected with detection device.

In some embodiments, the detection device includes a controller, a three-axis gyroscope, a three-axis accelerometer, and a three-axis micro-magnetic sensor, each of which is electrically connected to the controller.

The three-axis gyroscope, the three-axis accelerometer and the three-axis micro-magnetic sensor are respectively arranged at the end angles of the installation part 111, the controller is arranged in the middle of the installation part 111, and the three-axis gyroscope, the three-axis accelerometer and the three-axis micro-magnetic sensor are respectively electrically connected with the controller.

By arranging the controller, the three-axis gyroscope, the three-axis accelerometer and the three-axis micro-magnetic sensor on the mounting part 111, the compass 100 can accurately calculate navigation information in an underwater dynamically-changing environment, and accurate heading detection is facilitated.

According to another aspect of an embodiment of the present invention, there is provided a compass bird comprising a housing in which the compass 100 of the above-described embodiment is disposed.

In the compass bird provided by the invention, the first sealing ring 130 is arranged between the support frame 110 of the compass 100 and the protective shell 120, and the second sealing ring 121 is arranged between the side wall of the protective shell 120 and the housing of the compass bird, so that the compass 100 and the housing of the compass bird jointly form a double-layer sealing shock absorption structure, the problem of measurement deviation of the compass 100 caused by external shock is avoided, and the double-layer sealing further improves the waterproof performance of the compass 100.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being covered by the appended claims and their equivalents. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A compass for a compass bird, comprising: the device comprises a detection device, a support frame and a protective shell;

the detection device is arranged on the support frame, and at least part of the support frame is arranged in the protective shell;

a first sealing ring is clamped between the support frame and the protective shell;

the lateral wall cover of protective housing is equipped with the second sealing washer, the second sealing washer be used for with compass bird's shells inner wall butt, in order will protective housing seal installation in compass bird's casing.

2. The compass according to claim 1, wherein the protective casing is a cylindrical structure with an opening at one end, and the supporting frame is sealingly inserted into the protective casing through the opening.

3. The compass according to claim 1, wherein the supporting bracket is provided with a first groove, and the first sealing ring is sleeved in the first groove.

4. The compass according to claim 3, wherein the supporting frame includes an installation portion and a sealing portion, the detecting device is disposed on the installation portion, the sealing portion is disposed at two ends of the installation portion, the first sealing ring is sleeved on the sealing portion at two ends of the installation portion, so that when the supporting frame is inserted into the protective shell, the outer periphery of the first sealing ring is in butt fit with the inner wall of the protective shell.

5. The compass of claim 2, wherein an end cap is disposed at one end of the support frame, and the end cap covers the opening.

6. The compass of claim 5, wherein the end cap is provided with a through hole, a sealing plug is provided in the through hole, a side wall of the sealing plug facing the through hole is provided with a first annular groove, and a sealing ring is provided in the first annular groove and abuts against an inner wall of the through hole.

7. The compass according to claim 6, wherein a wire channel is formed in the sealing plug, the wire channel is used for accommodating a wire, at least one end face of the sealing plug is provided with a glue injection groove communicated with the wire channel, and the glue injection groove is used for injecting a sealing glue to seal the wire channel.

8. The compass according to claim 6 or 7, wherein the inner wall of the through hole is provided with a second annular groove, a clamp spring is clamped in the second annular groove, and the clamp spring abuts against one end of the sealing plug to fix the sealing plug in the through hole.

9. The compass according to any one of claims 1-7, wherein the detection device comprises a controller, a three-axis gyroscope, a three-axis accelerometer, and a three-axis micro-magnetic sensor, the three-axis gyroscope, the three-axis accelerometer, and the three-axis micro-magnetic sensor being electrically connected to the controller, respectively.

10. A compass bird comprising a housing in which is disposed a compass according to any one of claims 1-9.