CN112797884A - High-precision inductive linear displacement sensor - Google Patents
High-precision inductive linear displacement sensor Download PDFInfo
- Publication number
- CN112797884A CN112797884A CN202110128356.3A CN202110128356A CN112797884A CN 112797884 A CN112797884 A CN 112797884A CN 202110128356 A CN202110128356 A CN 202110128356A CN 112797884 A CN112797884 A CN 112797884A
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- China
- Prior art keywords
- chip
- circuit board
- flexible circuit
- linear displacement
- measuring body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to the technical field of sensors, in particular to a high-precision induction linear displacement sensor which comprises an outer shell, a chip, a measuring body and an induction sheet, wherein the induction sheet is formed by stamping metal materials, the outer shell is of an L-shaped structure and comprises a chip installation part and a measuring body installation part which are integrally formed, the chip card is installed on the chip installation part, the measuring body is a flexible circuit board, and the flexible circuit board and the measuring body installation part are integrally molded through low-pressure injection and are connected with a measuring body interface of the chip. The device provided by the invention has the advantages of simple structure, convenience in manufacturing and mounting, high measurement precision and good dustproof and anticorrosion performances.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a high-precision inductive linear displacement sensor.
Background
At present, a known non-contact linear displacement sensor adopts a magnetic measurement mode, and for the application of measuring displacement greater than 35mm, a magnetic material unit formed by splicing two 5mm × 5mm discontinuous cuboid magnets is generally adopted. Due to the splicing of the two non-continuous magnets, the magnetic field generated around the whole magnetic unit is non-uniform, thereby reducing the measurement accuracy, which is usually +/-3.5% (full range). And due to the size limitation of magnet materials and the fact that a magnetic induction device must directly face a magnet, the magnetic displacement sensor cannot realize linear translation measurement between cylinders with the thickness of 1.5mm and thin walls and small intervals (<1 mm).
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-precision induction linear displacement sensor which has the advantages of simple structure, small and thin volume, light weight, convenient manufacture and installation, high measurement precision and better dustproof and anticorrosion performances.
The invention is realized by the following technical scheme:
the utility model provides a high accuracy response linear displacement sensor, its includes shell body, chip, the measurement body and response piece, the response piece is formed for the metal material punching press, the shell body is L shape structure, including integrated into one piece's chip installation department and measurement body installation department, the chip card dress is on the chip installation department, the measurement body is flexible circuit board, flexible circuit board and measurement body installation department low pressure mould plastics as an organic whole and with the measurement body interface connection of chip.
Preferably, the induction sheet, the measuring body mounting part and the flexible circuit board are all arc thin-wall structures.
Further, the measuring body installation part is integrally formed with a flexible circuit board protection shell matched with the shape of the measuring body installation part in a low-pressure injection molding mode on the outer side of the flexible circuit board.
Furthermore, convex edges are integrally formed on the left side and the right side of the measuring body installation part.
Optimally, a step is injected between the chip mounting part and the measuring body mounting part, and the upper part of the flexible circuit board is matched with the step and injected with the step together at low pressure.
Further, the chip mounting part is integrally injection-molded with a mounting hole.
Advantageous effects of the invention
The high-precision induction linear displacement sensor protected by the invention has the following advantages:
1. the structure is simple, and the manufacture and the installation are convenient;
2. small and thin volume and light weight;
3. the flexible circuit board has good dustproof and anticorrosion performance, is well protected, and greatly prolongs the service life;
4. the measuring precision is high, and the linear translation between two thin-wall cylinders with the interval of less than 1mm can be accurately measured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
in the figure, 1, a chip mounting part, 2, a step, 3, a measuring body mounting part, 4, a sensing sheet, 5, a flexible circuit board protective shell, 6, a convex edge, 7, a flexible circuit board, 8, a chip, 9, a mounting hole, 10, a first tested part and 11, a second tested part are shown.
Detailed Description
The utility model provides a high accuracy response linear displacement sensor, its includes shell body, chip 8, the measurement body and responds to piece 4, the response piece is formed for the metal material punching press, the shell body is L shape structure, including integrated into one piece's chip installation department 1 and measurement body installation department 3, the chip clamps on the chip installation department, the measurement body is flexible circuit board 7, flexible circuit board and measurement body installation department low pressure mould plastics as an organic whole and with the measurement body interface connection of chip.
The induction sheet, the measuring body installation part and the flexible circuit board are of arc thin-wall structures, the accurate measurement of linear translation between two thin-wall cylinders with the interval of <1mm can be realized, the induction sheet is fixedly installed on the outer wall of the first cylinder and moves linearly along with the first cylinder, the measuring body installation part is attached to the inner wall of the second cylinder, a coil in the flexible circuit board can accurately sense the position of the induction sheet and transmits information to the chip, and therefore the linear displacement of two objects is accurately measured.
Further, the flexible circuit board protection shell 5 matched with the shape of the measuring body installation part is formed in the measuring body installation part in the outer side of the flexible circuit board in an integrated low-pressure injection molding mode, the flexible circuit board can be protected, the flexible circuit board is dustproof, oil-proof and corrosion-proof, and therefore the service life of the flexible circuit board is prolonged.
Further, the equal integrated into one piece in measurement body installation department left and right sides has protruding stupefied 6, can make things convenient for the dismouting and install more firm through two protruding stupefied and measured part joint of measurement body installation department, prevents that flexible circuit board from taking place to rock and influencing measuring result's accuracy nature among the measurement process.
Optimized, step 2 is moulded plastics between chip installation department and the measurement body installation department, and the flexible circuit board upper portion is moulded plastics with the step phase-match and with the step low pressure together, makes the connection between flexible circuit board and the shell body more firm, prevents that flexible circuit board from rocking and the joint between the chip drops.
Further, the integrative injection moulding of chip installation department has mounting hole 9, and the casing body and the fixed mounting of other parts of being convenient for are just made in the preparation, make the sensor installation more firm reliable.
During the sensor installation, with response piece fixed mounting on first surveyed part 10 and with first surveyed the part paste tightly, shell body fixed mounting is surveyed on part 11 at the second, and make flexible circuit board and second surveyed the part paste tightly and relative with the response piece, the response piece is followed first surveyed the part and is surveyed part linear movement for the second, the position of response piece can accurately be sensed to flexible circuit board's induction coil, and give the chip with information transfer, the chip just can calculate two linear displacements of being surveyed between the part.
Because the response piece forms for the metal material punching press, the shell body is L shape structure, including integrated into one piece's chip installation department and measurement body installation department, the measurement body be flexible circuit board and with measure the body installation department low pressure mould plastics as an organic whole, the overall structure of sensor is fairly simple, the preparation installation is very convenient and fast, with low costs and small and thin. During installation, the chip installation part can be installed at the top of a measured component, the space between two measured components is not occupied, the measurement body installation part and the sensing piece are located between two thin-wall-shaped components with small intervals, the measurement body installation part and the sensing piece are of thin-sheet-shaped structures and are not limited by the intervals between the two thin-wall-shaped components, and the flexible circuit board in the measurement body installation part is continuous and does not need to be spliced, so that the measurement precision is high.
In conclusion, the high-precision induction linear displacement sensor protected by the invention has the advantages of simple structure, small and thin size, light weight, convenience in manufacturing and installation, high measurement precision and good dustproof and anticorrosion performances.
Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a linear displacement sensor of high accuracy response, its characterized in that, includes shell body, chip, the measurement body and response piece, the response piece is formed for the metal material punching press, the shell body is L shape structure, including integrated into one piece's chip installation department and measurement body installation department, the chip card dress is on the chip installation department, the measurement body is flexible circuit board, flexible circuit board and measurement body installation department low pressure are moulded plastics as an organic whole and with the measurement body interface connection of chip.
2. The high-precision induction linear displacement sensor according to claim 1, wherein the induction sheet, the measuring body mounting part and the flexible circuit board are all arc thin-wall structures.
3. A high accuracy inductive linear displacement transducer according to any one of claims 1-2, wherein said measuring body mounting portion is integrally formed with a flexible circuit board protective housing by low pressure injection molding, which is shaped to match the shape of the measuring body mounting portion, on the outer side of the flexible circuit board.
4. A high accuracy inductive linear displacement transducer according to any one of claims 1-2, characterized in that the left and right sides of said measuring body mounting portion are integrally formed with ridges.
5. A high accuracy inductive linear displacement transducer according to any one of claims 1-2, characterized in that a step is injection molded between the chip mounting portion and the measuring body mounting portion, and the upper portion of the flexible circuit board is matched with the step and is injection molded with the step at low pressure.
6. A high accuracy inductive linear displacement transducer according to any one of claims 1-2, wherein said chip mounting portion is integrally injection molded with mounting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110128356.3A CN112797884A (en) | 2021-01-29 | 2021-01-29 | High-precision inductive linear displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110128356.3A CN112797884A (en) | 2021-01-29 | 2021-01-29 | High-precision inductive linear displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112797884A true CN112797884A (en) | 2021-05-14 |
Family
ID=75813013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110128356.3A Pending CN112797884A (en) | 2021-01-29 | 2021-01-29 | High-precision inductive linear displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112797884A (en) |
-
2021
- 2021-01-29 CN CN202110128356.3A patent/CN112797884A/en active Pending
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