CN108205065B

CN108205065B - Accelerometer heating piece

Info

Publication number: CN108205065B
Application number: CN201611176151.8A
Authority: CN
Inventors: 徐国栋; 刘洋; 杨守安; 潘天鹏; 杨杏敏
Original assignee: Aerospace Science and Industry Inertia Technology Co Ltd
Current assignee: Aerospace Science and Industry Inertia Technology Co Ltd
Priority date: 2016-12-19
Filing date: 2016-12-19
Publication date: 2021-01-01
Anticipated expiration: 2036-12-19
Also published as: CN108205065A

Abstract

The invention provides a novel accelerometer heating piece device. Through set up hollow out construction at the piece that heats insulating layer, place soldering lug and lead wire in the hollow out construction of the piece centre that heats, establish the corner at insulating layer both ends into measures such as fillet structure, eliminated the warpage phenomenon of traditional piece that heats, guaranteed temperature control, ensured accelerometer reliable and stable work. Meanwhile, the basic structure and the material of the original heating sheet are not changed, the consistency of the product structure and the material is ensured, the reliability of product bonding is ensured, and the production cost is reduced.

Description

Accelerometer heating piece

Technical Field

The invention relates to a device for heating a quartz flexible accelerometer, and belongs to the technical field of heating devices.

Background

The quartz flexible accelerometer is used as an important device for inertial measurement, and has the advantages of high precision, high stability and the like. The measurement accuracy of the accelerometer is affected by the ambient temperature, so that the accelerometer needs to be temperature-controlled during operation, thereby providing a relatively constant temperature working environment. In order to realize the temperature control of the accelerometer, the existing accelerometer adopts a bonding heating sheet mode. The accelerometer is formed by bonding the outer wall of the whole shell after the outer part of the accelerometer shell is coated by a flexible heating sheet.

Because the accelerometer external diameter is little, the radius of curvature is only about 10mm after the piece that heats hugs closely its casing outer wall, and this deflection leads to its self restoring force to increase, and when this power value surpassed the cohesion of the piece that heats after the bonding and casing, the piece border that heats appeared the perk to lead to controlling the temperature inefficacy.

Disclosure of Invention

The present invention is to overcome the above-mentioned shortcomings of the prior art and to provide a new accelerometer heating device.

The invention is realized by the following steps:

the utility model provides an accelerometer heating piece, includes heating plate, goes up insulating layer, lower insulating layer, pad, lead wire, and the heating plate is located between upper insulating layer and the lower insulating layer, and the pad is connected with the heating plate, and the lead wire is connected with the pad, and its characterized in that goes up the insulating layer and has hollow out construction.

The hollow structure comprises but is not limited to a rectangle, an ellipse, a rounded rectangle and a diamond.

The hollow structures are distributed along the length direction of the heating sheet at equal intervals.

The number N of the hollow-out structures and the width a thereof have a relationship with the length L of the upper insulating layer and the number N of the minimum length units, namely N is more than or equal to 5N, and L is more than or equal to 2 (nxa).

The bonding pad and the lead are located at the hollow structure.

The bonding pad and the lead are positioned in the middle of the heating piece, and the heating pieces on the left side and the right side of the bonding pad are symmetrically distributed.

The two ends of the upper insulating layer are shorter than the lower insulating layer.

And two ends of the upper insulating layer are respectively half of the width a of the hollow structure than the lower insulating layer.

The corners at two ends of the upper insulating layer are in a fillet structure.

The radius of the fillet structure is smaller than the length difference between the two ends of the upper insulating layer and the lower insulating layer.

The upper insulating layer and the lower insulating layer are made of semitransparent materials.

In order to improve the insulation effect, a transparent and brilliant material, such as a polyimide film, can be coated on the outer side of the upper insulation layer.

Compared with the prior art, the invention has the beneficial effects that:

(1) compared with the existing heating sheet, the invention has no warping phenomenon after bonding, ensures temperature control and ensures reliable and stable operation of the accelerometer.

(2) The invention does not change the basic structure of the original heating sheet, and continues to use the sandwich structure of the upper insulating layer, the lower insulating layer and the heating sheet, thereby ensuring the consistency of the structure, ensuring the bonding reliability of the product and reducing the production cost.

(3) The invention does not change the material of the original heating sheet, ensures the reliability of the product and reduces the production cost.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art warming patch;

FIG. 2 is a schematic top view of a prior art heating plate (the upper insulating layer is made of a translucent material, so the heating plate is drawn by a solid line);

FIG. 3 is a schematic cross-sectional view of a warming patch according to the present invention;

FIG. 4 is a schematic top view of a warming patch according to the present invention;

FIG. 5 is a schematic diagram of a rhombic hollow structure of the warming patch provided by the present invention;

FIG. 6 is a schematic view of an elliptical hollow structure of a warming patch according to the present invention;

FIG. 7 is a schematic view of a round-corner rectangular hollow structure of the heating plate according to the present invention;

FIG. 8 is a schematic view of a minimum length unit of a warming patch provided by the present invention;

in the figure, 1 is an upper insulating layer, 2 is a lower insulating layer, 3 is a lead, 4 is a bonding pad, 5 is a heating plate, 6 is a hollow structure, a is the width of the hollow structure, the number of the hollow structure is N, b is the width of a minimum length unit, the number of the hollow structure is N, and L is the length of the upper insulating layer.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples. As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8.

The utility model provides an accelerometer heating piece, includes heating plate 5, goes up insulating layer 1, lower insulating layer 2, pad 4, lead wire 3, and heating plate 5 is located between insulating layer 1 and the lower insulating layer 2, and pad 4 is connected with heating plate 5, and the lead wire is connected with pad 4, and its characterized in that goes up insulating layer 1 and has hollow out construction 6.

The hollow structure 6 includes but is not limited to a rectangle, an ellipse, a rounded rectangle, and a diamond.

The hollow structures 6 are distributed along the length direction of the heating sheet at equal intervals.

The number N of the hollow structures 6 and the width a thereof have a relationship with the length L of the upper insulating layer 1 and the minimum length unit number N, namely N is more than or equal to 5N, and L is more than or equal to 2 (nxa). The heating plate is composed of a plurality of identical minimum length units, each of which includes two bends.

The bonding pad 4 and the lead are positioned at the hollow structure 6.

The two bonding pads 4 are positioned in the middle of the heating sheet, and the heating sheets 5 on the left side and the right side of the bonding pads 4 are symmetrically distributed.

The two ends of the upper insulating layer 1 are shorter than the lower insulating layer 2.

And two ends of the upper insulating layer 1 are respectively shorter than the lower insulating layer 2 by half of the width a of the hollow structure 6.

The corners at two ends of the upper insulating layer 1 are in a fillet structure.

The radius of the fillet structure is smaller than the length difference between the two ends of the upper insulating layer 1 and the lower insulating layer 2.

The best embodiment is as follows:

referring to fig. 4, four corners of the lower insulating layer 2 are rounded with a radius of 2mm, and the heating sheet 5 is adhered to the lower insulating layer 2 by an adhesive (not shown). Two welding pads 4 are welded at the head end and the tail end of the heating plate 5 respectively, and the welding pads 4 are positioned in the middle of the heating plate 5. The bonding pads 4 are all in a slender rectangular structure, wherein the width of the bonding pads 4 is equal to that of the heating plates 5, and the length of the bonding pads 4 is 5 times of the width. The pads 4 are connected to the leads 3 by soldering. The upper insulating layer 1 is covered and adhered on the heating plate 5, and forms a sandwich structure with the lower insulating layer 2 to sandwich the heating plate 5. Four corners of the upper insulating layer 1 are fillets with the radius 2 of 2mm, and two ends of the fillets are respectively 3mm away from two ends of the lower insulating layer 2.

The upper insulating layer 1 is provided with three hollow structures 6, one of the hollow structures is positioned at the position of the bonding pad 4, the other two hollow structures are symmetrically distributed at the left side and the right side of the heating piece, and the heating piece is equally divided into 4 sections by the three hollow structures 6. Each of the hollow structures 6 has a width of 6mm, which exceeds the minimum length unit of the heating sheet 5 by 5 mm. The heating plate is composed of a plurality of identical minimum length units, each of which includes two bends.

The number N and the width a of the hollow structures are in the following relation with the length L of the upper insulating layer and the number N of the minimum length units, wherein N is more than or equal to 5N, and L is more than or equal to 2(N multiplied by a). Preferably, N.gtoreq.8N, L.gtoreq.4 (nxa) are taken.

Through the improvement of the invention, the new heating sheet is heated and cured by adopting the existing process, and has no edge corner curling phenomenon.

The invention has not been described in detail and is in part known to those of skill in the art.

Claims

1. An accelerometer heating piece comprises a heating piece (5), an upper insulating layer (1), a lower insulating layer (2), a bonding pad (4) and a lead (3), wherein the heating piece (5) is positioned between the upper insulating layer (1) and the lower insulating layer (2), the bonding pad (4) is connected with the heating piece (5), and the lead (3) is connected with the bonding pad (4), and is characterized in that the upper insulating layer (1) is provided with a hollow structure (6);

the number N of the hollow structures (6) and the width a thereof have a relationship with the length L of the upper insulating layer (1) and the minimum length unit number N, namely N is more than or equal to 5N, and L is more than or equal to 2 (nxa);

the bonding pad (4) and the lead (3) are positioned at the hollow structure (6); the bonding pad (4) and the lead (3) are also positioned in the middle of the heating sheet, and the heating sheets (5) on the left side and the right side of the bonding pad (4) are symmetrically distributed;

the two ends of the upper insulating layer (1) are shorter than the two ends of the lower insulating layer (2).

2. An accelerometer warming patch as claimed in claim 1, wherein: the hollow structure (6) is rectangular, oval, rounded rectangle or rhombic.

3. An accelerometer warming patch as claimed in claim 1, wherein: the hollow structures (6) are distributed along the length direction of the heating sheet at equal intervals.

4. An accelerometer warming patch as claimed in claim 1, wherein: and two ends of the upper insulating layer (1) are respectively shorter than the lower insulating layer (2) by half of the width a of the hollow structure (6).

5. An accelerometer warming patch as claimed in claim 1, wherein: the corners at the two ends of the upper insulating layer (1) are in a fillet structure.

6. An accelerometer warming patch as claimed in claim 5, wherein: the radius of the fillet structure is smaller than the length difference between the two ends of the upper insulating layer (1) and the lower insulating layer (2).