Quartz flexible acceleration sensor capable of realizing full sealing after convenient test and screening

Abstract

The quartz flexible acceleration sensor comprises a meter head, the meter head comprises a shell, a first binding post is arranged in the shell, and a first opening is formed in the top of the shell; the servo circuit assembly comprises a circuit cover, the circuit cover is detachably arranged at the top of the shell, a second opening is formed in the bottom of the circuit cover, and the first opening is in butt joint with the second opening, so that the circuit cover can be arranged at the top of the shell; the second binding post is arranged on the circuit cover, and the first binding post and the second binding post are connected through the connecting assembly, so that compared with the structure of an existing acceleration sensor, a cat eye is prevented from being formed in the circuit cover, the sealing performance of the device is improved, the effect of protecting the internal structure of the device is achieved, and the internal structure of the device is prevented from being affected.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of high-precision measuring instruments, in particular to a quartz flexible acceleration sensor capable of achieving full sealing after convenient testing and screening. BACKGROUND

[0002] The quartz flexible acceleration sensor is mainly composed of a meter head and a servo circuit, the meter head is composed of a meter core and a shell, and the servo circuit is composed of a circuit board and a circuit cover. The performance index of the quartz flexible acceleration sensor is obtained by testing and screening to obtain products meeting the requirements, and the performance index of the quartz flexible acceleration sensor is mainly determined by the performance of the sensor meter head.

[0003] The quartz flexible acceleration sensor plays a very important role in the technical fields of oil drilling, railways, navigation, ships, etc. as an inertial navigation instrument or a remote control and telemetry instrument. The volume of the sensor required by the current market is smaller and smaller, the air tightness and reliability conditions are higher and higher, and the convenience of testing and screening work is also required higher and higher.

[0004] On the current quartz flexible acceleration sensor, a cat eye is usually arranged on the circuit cover, that is, a through hole is formed on the circuit cover to enable the terminal post of the meter head to be connected to the terminal post of the servo circuit, but the existence of the cat eye cannot meet the air tightness requirement, and therefore the present application provides a quartz flexible acceleration sensor capable of achieving full sealing after convenient testing and screening. SUMMARY

[0005] In view of the above defects or deficiencies in the prior art, it is desirable to provide a quartz flexible acceleration sensor capable of achieving full sealing after convenient testing and screening.

[0006] In a first aspect, the present application provides a quartz flexible acceleration sensor capable of achieving full sealing after convenient testing and screening, comprising:

[0007] a meter head, the meter head comprising a shell, the shell being provided with a first terminal post inside, and the top of the shell being provided with a first opening;

[0008] a servo circuit assembly, the servo circuit assembly comprising a circuit cover, the circuit cover being detachably arranged on the top of the shell, the bottom of the circuit cover being provided with a second opening, and the first opening and the second opening being in opposite connection;

[0009] a second terminal post is arranged on the circuit cover, the bottom of the second terminal post extending into the inside of the circuit cover and being connected to the first terminal post through a connecting assembly.

[0010] According to the technical scheme provided by the embodiment of the present application, the connecting assembly comprises a first circuit board arranged in the inside of the shell and connected to the first terminal post, and the first circuit board has a connecting end away from the first terminal post.

[0011] According to the technical scheme provided in the embodiment of the application, the connecting assembly further comprises a second circuit board, the second circuit board is arranged inside the circuit cover, the second circuit board is connected with the second terminal post, and the connecting end is connected with the second circuit board.

[0012] According to the technical scheme provided in the embodiment of the application, the top of the shell has a first connecting part in the shape of a ring, and the circumferential inner wall of the first connecting part forms the first opening.

[0013] According to the technical scheme provided in the embodiment of the application, the bottom of the circuit cover has a second connecting part in the shape of a ring, and the circumferential inner wall of the second connecting part forms the second opening.

[0014] According to the technical scheme provided in the embodiment of the application, the circumferential inner wall of the first connecting part is provided with a first groove in the shape of a ring.

[0015] According to the technical scheme provided in the embodiment of the application, the circumferential outer wall of the second connecting part is provided with a second groove in the shape of a ring.

[0016] According to the technical scheme provided in the embodiment of the application, a connecting glue is arranged between the first groove and the second groove.

[0017] According to the technical scheme provided in the embodiment of the application, the bottom of the circuit cover is provided with a ring-shaped abutting part outside the second connecting part, which is used for abutting against the top of the first connecting part, and the circumferential edge of the bottom of the circuit cover is provided with a chamfered part.

[0018] According to the technical scheme provided in the embodiment of the application, the circumferential outer wall of the shell is fixedly provided with a square flange, and mounting holes are arranged at the four corners of the square flange.

[0019] In summary, the technical scheme specifically discloses a quartz flexible acceleration sensor which can be conveniently tested and screened and is fully sealed after screening, comprising a meter head, the meter head comprising a shell, a first terminal post being arranged in the shell, and the top of the shell having a first opening; further comprising a servo circuit assembly, the servo circuit assembly comprising a circuit cover, the circuit cover being detachably arranged at the top of the shell, the bottom of the circuit cover having a second opening, and the first opening and the second opening being connected, so that the circuit cover can be arranged at the top of the shell; a second terminal post being arranged on the circuit cover, and the first terminal post and the second terminal post being connected through a connecting assembly, so that, compared with the structure of an existing acceleration sensor, the quartz flexible acceleration sensor avoids opening a cat eye on the circuit cover, increases the sealing property of the device, plays a role in protecting the internal structure of the device, and avoids affecting the internal structure of the device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects, and advantages of the application will become more apparent by reference to the following detailed description of non-limiting embodiments thereof, taken in conjunction with the accompanying drawings:

[0021] Figure 1 It is a sectional view of a quartz flexible acceleration sensor which can realize full sealing after convenient test screening.

[0022] Figure 2 It is a sectional view of a quartz flexible acceleration sensor which can realize full sealing after convenient test screening. Figure 1 It is an enlarged view of A in the middle.

[0023] Reference signs in the drawings: 1, housing; 2, first terminal post; 3, circuit cover; 4, second terminal post; 5, first circuit board; 6, second circuit board; 7, first connecting part; 8, second connecting part; 9, connecting glue; 10, square flange; 11, chamfered part. DETAILED DESCRIPTION

[0024] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and are not a limitation on the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0025] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0026] Embodiment one

[0027] Please refer to Figure 1 and Figure 2 , a quartz flexible acceleration sensor which can realize full sealing after convenient test screening, comprising:

[0028] A table head, the table head comprising a housing 1, the housing 1 being fixedly provided with a square flange 10 on the circumferential outer wall, the square flange 10 being provided with mounting holes at four corners;

[0029] A servo circuit assembly, the servo circuit assembly comprising a circuit cover 3, the circuit cover 3 being detachably arranged on the top of the housing 1;

[0030] Thus, the circuit cover 3 and the housing 1 are connected, and the device can be installed on the external structure through the mounting holes;

[0031] Further, the square flange 10 can reduce the occupied space when the device is installed.

[0032] The housing 1 has a first connecting part 7 on the top, which is annular, and the circumferential inner wall of the first connecting part 7 forms a first opening;

[0033] The bottom of the circuit cover 3 has a second connecting part 8 which is annular, and the circumferential inner wall of the second connecting part 8 forms a second opening;

[0034] The first opening and the second opening are connected, so that the circuit cover 3 is installed on the top of the shell 1, and at this time, the second connecting part 8 is inside the first connecting part 7;

[0035] Further, the circumferential inner wall of the first connecting part 7 is provided with an annular first groove, and the circumferential outer wall of the second connecting part 8 is provided with an annular second groove. After the first opening and the second opening are connected, the circuit cover 3 is installed on the top of the shell 1, and the shell 1 and the circuit cover 3 are preliminarily connected by filling connecting glue 9 between the first groove and the second groove, so that subsequent test screening can be further carried out to avoid the shell 1 and the circuit cover 3 from falling off due to unstable connection;

[0036] It should be noted that the connecting glue 9 is soft glue, not structural glue. The connecting glue 9 can realize the adhesion between the shell 1 and the circuit cover 3, and the shell 1 and the circuit cover 3 can be separated after test screening;

[0037] Further, the bottom of the circuit cover 3 is provided with an annular abutting part outside the second connecting part 8, which is used to abut against the top of the first connecting part 7, and the circumferential edge of the bottom of the circuit cover 3 is provided with a chamfered part 11;

[0038] Therefore, after the shell 1 and the circuit cover 3 are connected, the top of the first connecting part 7 and the abutting part abut against each other, and the chamfered part 11 facilitates welding, so that the parts of the outer walls of the shell 1 and the circuit cover 3 in contact with each other are welded together, improving the welding quality and the sealing performance.

[0039] The shell 1 is provided with a first connecting post 2, and the circuit cover 3 is provided with a second connecting post 4, the bottom of which extends into the inside of the circuit cover 3 and is connected with the first connecting post 2 through a connecting assembly;

[0040] Further, the connecting assembly comprises a first circuit board 5, which is arranged inside the shell 1 and connected with the first connecting post 2. The first circuit board 5 has a connecting line, and the end of the connecting line away from the first circuit board 5 is a connecting end;

[0041] Optionally, the first circuit board 5 is FPC, which has the characteristics of high wiring density, light weight, thin thickness and good bending property;

[0042] Further, the connecting assembly further comprises a second circuit board 6, which is arranged inside the circuit cover 3 and connected with the bottom of the second connecting post 4. The connecting end is connected with the second circuit board 6, so as to realize the connection between the first connecting post 2 and the second connecting post 4;

[0043] On the existing quartz flexible acceleration sensor, a cat eye is formed on the circuit cover, that is, a through hole is formed on the circuit cover, the through hole corresponds to a terminal post inside the shell, and after installation, the terminal post extends to the outside of the quartz flexible acceleration sensor through the through hole; in the present application, the first terminal post 2 and the second terminal post 4 are connected by the connecting assembly, and a through hole does not need to be formed on the circuit cover 3, thereby increasing the sealing property.

[0044] Working principle: the first terminal post 2 is connected to the second terminal post 4 through the connecting assembly, and then the meter head and the servo circuit assembly are assembled, after assembly, the connecting glue 9 is filled between the first groove and the second groove to achieve a certain fixing and sealing effect, and the testing and screening of the device can be realized, after the testing and screening of the device are completed, the servo circuit assembly and the unqualified meter head can be completely separated through a special tool, and since the connecting glue 9 is soft glue rather than structural glue, the servo circuit assembly and the unqualified meter head can be completely separated, avoiding the adhesion of the servo circuit assembly and the meter head together.

[0045] After the testing and screening of the device are completed, the qualified products are fully sealed and welded, the chamfer part 11 is arranged at the contact between the circuit cover 3 and the shell 1, the welding quality between the circuit cover 3 and the shell 1 is improved, the welding quality ensures the full sealing effect of the product, and the connecting glue also provides a sealing effect. The shell 1 and the circuit cover 3 are connected by laser welding, which protects the internal structure of the device, and the shell 1 and the circuit cover 3 have a shielding effect after laser welding, preventing external environmental interference.

[0046] In addition, in order to improve the full sealing quality of the device and reduce the number of laser welding parts, the original cat eye form on the circuit cover is changed to an integrated structure of the circuit cover, the cat eye is cancelled (the number of laser welding parts is reduced), and the first terminal post 2 and the second terminal post 4 are connected by the connecting assembly. The FPC used here is a whole, the FPC whole realizes the connection with the first terminal post 2 and the second terminal post 4, can improve the reliability of the connection and the convenience of welding, at the same time, the FPC increases a plurality of functional areas, can realize the adjustment and temperature detection functions of the circuit.

[0047] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form a technical solution.

Claims

1. A quartz flexible acceleration sensor which can be fully sealed after convenient test screening, characterized in that, Include: The table head, the table head includes the shell (1), the shell (1) is provided with first terminal post (2) in, and the shell (1) top is provided with first opening; Servo circuit assembly, the servo circuit assembly includes circuit cover (3), the circuit cover (3) is detachably arranged at the shell (1) top, the circuit cover (3) bottom has second opening, and the first opening and the second opening are opposite to each other; The second terminal post (4) is arranged on the circuit cover (3), which extends to the inside of the circuit cover (3) at the bottom, and is connected with the first terminal post (2) through the connecting assembly.

2. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 1, characterized in that, The connecting assembly includes a first circuit board (5), which is arranged in the shell (1) and connected with the first terminal post (2), and the first circuit board (5) has a connecting end away from the first terminal post (2).

3. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 2, characterized in that, The connecting assembly further includes a second circuit board (6), the second circuit board (6) is arranged in the circuit cover (3), and the second circuit board (6) is connected with the second terminal post (4), and the connecting end is connected with the second circuit board (6).

4. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 1, characterized in that, The shell (1) top has annular first connecting part (7), and the circumferential inner wall of the first connecting part (7) forms the first opening.

5. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 4, characterized in that, The bottom of the circuit cover (3) has annular second connecting part (8), and the circumferential inner wall of the second connecting part (8) forms the second opening.

6. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 5, characterized in that, The circumferential inner wall of the first connecting part (7) is provided with annular first groove.

7. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 6, characterized in that, The circumferential outer wall of the second connecting part (8) is provided with annular second groove.

8. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 7, characterized in that, The first groove and the second groove are provided with connecting glue (9) between them.

9. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 8, characterized in that, The bottom of the circuit cover (3) is provided with annular abutting portion outside the second connecting part (8), which is used for abutting the top of the first connecting part (7), and the bottom of the circuit cover (3) is provided with chamfered portion (11) on the circumferential edge.

10. The hermetically sealed quartz flexible acceleration sensor capable of convenient test screening according to claim 1, characterized in that, The circumferential outer wall of the shell (1) is fixedly provided with square flange (10), and the mounting hole is formed at the four corners of the square flange (10).

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