CN216246983U - Common rail pressure sensor - Google Patents
Common rail pressure sensor Download PDFInfo
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- CN216246983U CN216246983U CN202123006629.1U CN202123006629U CN216246983U CN 216246983 U CN216246983 U CN 216246983U CN 202123006629 U CN202123006629 U CN 202123006629U CN 216246983 U CN216246983 U CN 216246983U
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Abstract
The utility model relates to the technical field of pressure sensors, in particular to a common rail pressure sensor, which comprises a sensor shell, wherein the top end of the sensor shell is inwards provided with two through holes for containing, a deformation sheet is fixedly arranged below the through holes in the sensor shell, the through holes penetrate through the deformation sheet, a Wheatstone bridge is fixedly arranged below the through holes in the bottom end of the deformation sheet through glass micro-melting process sintering, and the Wheatstone bridge is used for carrying out pressure detection on the deformation quantity at the bottom end of the deformation sheet; a plurality of Wheatstone bridges are additionally arranged in the sensor, more accurate detection can be carried out on the pressure received in the sensor through the Wheatstone bridges, the problem of output data drifting is effectively avoided, and the sensor is more convenient to use.
Description
Technical Field
The utility model relates to the technical field of pressure sensors, in particular to a common rail pressure sensor.
Background
The common rail pressure sensor is used for measuring the real-time pressure of the fuel and transmitting the measurement result to an ECU (electronic control unit) as a feedback control signal of the oil pressure in the fuel distribution pipe;
the conventional pressure sensor has the risk of output data drifting when used in a high-pressure environment, the operation precision of equipment is influenced, and a common rail pressure sensor needs to be structurally improved and optimized aiming at the problem of exposure in the use process of the conventional common rail pressure sensor.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides the common rail pressure sensor which has the characteristic of further improving the pressure detection accuracy of equipment through two groups of Wheatstone bridges.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a common rail pressure sensor, includes the sensor housing, two conducting holes that are used for accomodating are inwards seted up to the top of sensor housing, the conducting hole below is located the fixed shape deformation piece that is equipped with in the inside of sensor housing, the conducting hole runs through to the inside of shape deformation piece, the below of conducting hole is located the bottom of shape deformation piece and is passed through the fixed wheatstone bridge that is equipped with of glass micro-melting technology sintering, just the wheatstone bridge carries out pressure measurement to shape deformation piece bottom deformation volume, the bottom mounting of sensor housing is equipped with a screw thread section of thick bamboo, the bottom mounting of a screw thread section of thick bamboo is equipped with the encapsulation end, just the wheatstone bridge passes through cable electric connection with the inside chip of encapsulation end.
According to the preferable technical scheme of the common rail pressure sensor, the sensor shell is fixedly provided with the separating sheet, and the separating sheet is used for equally dividing the deformation sheet, so that the two conducting holes are symmetrically arranged by taking the separating sheet as a symmetry axis.
As a preferred technical scheme of the common rail pressure sensor, an isolation assembly is arranged on the outer side of the deformation sheet and comprises a pressure-reducing rubber sleeve and a heat-insulating ceramic sleeve, the pressure-reducing rubber sleeve is laid on the inner wall of the sensor shell, the heat-insulating ceramic sleeve is filled in the pressure-reducing rubber sleeve, and the heat-insulating ceramic sleeve is sleeved on the outer wall of the deformation sheet.
As a preferred technical solution of the common rail pressure sensor of the present invention, a supporting cylinder is disposed below the shape-changing plate and inside the sensor housing, a bottom end of the supporting cylinder is connected to the encapsulation end, and a top end of the supporting cylinder contacts with the shape-changing plate to support the shape-changing plate.
According to the preferable technical scheme of the common rail pressure sensor, the outer edge of the upper end of the sensor shell is integrally provided with the extension ring, the diameter of the threaded cylinder is consistent with that of the extension ring, and the threaded cylinder is uniformly provided with the threaded grooves through welding and fixing.
According to the preferable technical scheme of the common rail pressure sensor, the bolt prism is fixedly arranged at the outer edge of the bottom end of the threaded cylinder.
As a preferred technical solution of the common rail pressure sensor of the present invention, the spacers may be two groups of members arranged in a crisscross manner, the number of the through holes may be four, and the four through holes are respectively disposed in four areas separated by the spacers.
Compared with the prior art, the utility model has the beneficial effects that:
1. a plurality of Wheatstone bridges are additionally arranged in the sensor, more accurate detection can be carried out on the pressure received in the sensor through the Wheatstone bridges, the problem of output data drifting is effectively avoided, and the sensor is more convenient to use.
2. The division plate is additionally arranged in the sensor, each space in the elastic body can be separated by the division plate, interference caused by each space in the elastic body is avoided, independent pressure detection can be carried out on the plurality of Wheatstone bridges, and detection precision is further improved.
3. The pressure-reducing rubber sleeve and the heat-insulating ceramic sleeve are additionally arranged in the pressure sensor, the pressure-reducing rubber sleeve and the heat-insulating ceramic sleeve are respectively isolated from the external pressure and the temperature, interference is caused to the elastic body when the external pressure and the temperature are changed, and the detection precision of further lifting equipment is improved.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the utility model briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing an internal cross-sectional structure in the present invention;
FIG. 3 is a schematic diagram of a Wheatstone bridge configuration according to the present invention;
in the figure: 1. a sensor housing; 2. a via hole; 3. an extension ring; 4. a threaded barrel; 5. a bolt prism; 6. packaging the end; 7. a pressure reducing rubber sleeve; 8. a heat insulating ceramic sheath; 9. deformation sheets; 10. a Wheatstone bridge; 11. a separator; 12. a support cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1-3, the common rail pressure sensor disclosed in the present invention comprises a sensor housing 1, two through holes 2 are formed at the top end of the sensor housing 1, a deformable plate 9 is fixedly disposed below the through holes 2 and inside the sensor housing 1, the through holes 2 penetrate into the deformable plate 9, a wheatstone bridge 10 is fixedly disposed below the through holes 2 and at the bottom end of the deformable plate 9 through sintering by glass micro-melting process, the wheatstone bridge 10 detects the deformation at the bottom end of the deformable plate 9, a threaded cylinder 4 is fixedly disposed at the bottom end of the sensor housing 1, a package end 6 is fixedly disposed at the bottom end of the threaded cylinder 4, the wheatstone bridge 10 is electrically connected to a chip inside the package end 6 through a cable, the wheatstone bridge 10 can convert a pressure signal into an electrical signal, and more accurate measurement is performed through a plurality of wheatstone bridges 10, and excessive errors caused by data drift are avoided.
Specifically, a separating sheet 11 is fixedly arranged in the sensor shell 1, and the separating sheet 11 equally divides the deformation sheet 9, so that the two conducting holes 2 are symmetrically arranged by using the separating sheet 11 as a symmetry axis, the conducting holes 2 symmetrically arranged in the embodiment enable the wheatstone bridge 10 to be arranged at a symmetrical position, the working environments of the two wheatstone bridges 10 are relatively consistent, the pressure inside the sensor can be detected conveniently, and the detection data is more ideal.
Specifically, the outside of morphable piece 9 is equipped with the isolation subassembly, the isolation subassembly includes decompression rubber sleeve 7 and thermal-insulated ceramic cover 8, decompression rubber sleeve 7 is laid at sensor housing 1's inner wall, thermal-insulated ceramic cover 8 is filled in the inside of decompression rubber sleeve 7, and thermal-insulated ceramic cover 8 covers at morphable piece 9's outer wall, decompression rubber sleeve 7 and thermal-insulated ceramic cover 8 are kept apart external pressure and temperature respectively in this embodiment, cause the interference to morphable piece 9 when avoiding external pressure and temperature variation.
Specifically, the below of a shape change piece 9 is equipped with a support section of thick bamboo 12 in the inside of sensor housing 1, and the bottom of a support section of thick bamboo 12 is connected with encapsulation end 6, and the top of a support section of thick bamboo 12 supports shape change piece 9 with shape change piece 9 contact, supports a section of thick bamboo 12 in this embodiment and can carry out effectual support to shape change piece 9.
Specifically, sensor housing 1's upper end outer fringe department integrated into one piece is equipped with and extends circle 3, and a screw thread section of thick bamboo 4 is unanimous with extending 3 diameters of circle, and a screw thread section of thick bamboo 4 evenly is equipped with the thread groove through welded fastening, and the sensor installation of being convenient for is encircled to the screw in this embodiment, and also the spiral mounting has the thread groove on sensor housing 1's lower extreme surface, the sensor installation of being convenient for.
Specifically, the outer edge of the bottom end of the thread cylinder 4 is fixedly provided with a bolt prism 5, and the bolt prism 5 in the embodiment facilitates a worker to manually rotate the pressure sensor by using a wrench.
Specifically, the separating plate 11 may be two groups of members arranged in a crisscross manner, four via holes 2 may be provided, and the four via holes 2 are respectively provided in four areas separated by the separating plate 11, in this way, four groups of wheatstone bridges 10 may be placed in the sensor in this embodiment, so as to more precisely detect the pressure value change inside the pressure sensor.
The working principle and the using process of the utility model are as follows: according to the utility model, a plurality of through holes 2 are formed in the pressure sensor, when the pressure sensor is installed in an oil tank, a thread groove in the outer wall of a thread cylinder 4 is screwed with threads in the inner wall of the oil tank, a worker rotates a bolt prism 5 by using a wrench, so that the pressure sensor can be installed on the oil tank, oil in the oil tank reaches the inside of a deformation sheet 9 through the through holes 2, the end part of the deformation sheet 9 is pressurized, a Wheatstone bridge 10 acquires the pressure value change of the deformation sheet 9, the Wheatstone bridge 10 measures the pressure change and outputs an electric signal, and then pressure data is transmitted to a chip in a packaging end 6 through a cable;
the pressure sensor in the technical scheme can also be used in the gas storage device, so that the gas pressure in the gas storage device can be conveniently detected;
when the technical scheme is in actual use, the pressure change numerical value in the sensor can be effectively detected through the plurality of Wheatstone bridges 10, the abnormal pressure data caused by the drift of single output data is avoided, the separator 11 is additionally arranged in the technical scheme, the separator 11 can separate the inside of the deformation sheet 9, the pressure interference in the sensor is further avoided, the heat insulation ceramic sleeve 8 is additionally arranged in the sensor, the heat insulation ceramic sleeve 8 has good heat insulation performance, the interference of the sensor shell 1 on the deformation sheet 9 when the external temperature changes is avoided, the decompression rubber sleeve 7 is additionally arranged on the outer side of the heat insulation ceramic sleeve 8, the decompression rubber sleeve 7 absorbs deformation pressure in the deformation process of the sensor shell 1, pressure conduction is avoided for the deformation sheet 9, external interference on the deformation sheet 9 is reduced, and accuracy of the pressure sensor during use is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all equivalent variations made by using the contents of the present specification and the drawings are within the protection scope of the present invention.
Claims (7)
1. A common rail pressure sensor comprising a sensor housing (1), characterized in that: the top of sensor housing (1) is inwards seted up two conducting holes (2) that are used for accomodating, the fixed shape deformation piece (9) that is equipped with in the inside of sensor housing (1) of conducting hole (2) below, conducting hole (2) run through to the inside of shape deformation piece (9), the bottom of the below of conducting hole (2) in shape deformation piece (9) is fixed through the little melting process sintering of glass and is equipped with wheatstone bridge (10), just wheatstone bridge (10) carry out pressure measurement to shape deformation piece (9) bottom deformation volume, the bottom mounting of sensor housing (1) is equipped with threaded section of thick bamboo (4), the bottom mounting of threaded section of thick bamboo (4) is equipped with encapsulation end (6), just wheatstone bridge (10) pass through cable electric connection with the inside chip of encapsulation end (6).
2. The common rail pressure sensor according to claim 1, wherein: a separating sheet (11) is fixedly arranged in the sensor shell (1), and the separating sheet (11) equally divides the deformation sheet (9), so that the two via holes (2) are symmetrically arranged by taking the separating sheet (11) as a symmetry axis.
3. The common rail pressure sensor according to claim 1, wherein: the outside of shape deformation piece (9) is equipped with the isolation subassembly, and the isolation subassembly includes decompression rubber sleeve (7) and thermal-insulated ceramic cover (8), the inner wall at sensor housing (1) is laid in decompression rubber sleeve (7), the inside at decompression rubber sleeve (7) is filled in thermal-insulated ceramic cover (8), just thermal-insulated ceramic cover (8) cover is at the outer wall of shape deformation piece (9).
4. The common rail pressure sensor according to claim 1, wherein: the sensor is characterized in that a supporting cylinder (12) is arranged inside the sensor shell (1) below the deformation sheet (9), the bottom end of the supporting cylinder (12) is connected with the packaging end (6), and the top end of the supporting cylinder (12) is in contact with the deformation sheet (9) to support the deformation sheet (9).
5. The common rail pressure sensor according to claim 1, wherein: the sensor shell is characterized in that an extension ring (3) is integrally formed at the outer edge of the upper end of the sensor shell (1), the diameter of the thread cylinder (4) is consistent with that of the extension ring (3), and thread grooves are uniformly formed in the thread cylinder (4) through welding and fixing.
6. The common rail pressure sensor according to claim 5, wherein: the outer edge of the bottom end of the threaded cylinder (4) is fixedly provided with a bolt prism (5).
7. The common rail pressure sensor according to claim 2, wherein: the partition plates (11) can be two groups of components which are arranged in a crisscross mode, the number of the through holes (2) can be four, and the four through holes (2) are respectively arranged in four areas separated by the partition plates (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123006629.1U CN216246983U (en) | 2021-11-30 | 2021-11-30 | Common rail pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123006629.1U CN216246983U (en) | 2021-11-30 | 2021-11-30 | Common rail pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN216246983U true CN216246983U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123006629.1U Active CN216246983U (en) | 2021-11-30 | 2021-11-30 | Common rail pressure sensor |
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| CN (1) | CN216246983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118089995A (en) * | 2022-11-25 | 2024-05-28 | 敏之捷传感科技(常州)有限公司 | Full-bridge strain gauge rail pressure sensor and pressure detection system |
-
2021
- 2021-11-30 CN CN202123006629.1U patent/CN216246983U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118089995A (en) * | 2022-11-25 | 2024-05-28 | 敏之捷传感科技(常州)有限公司 | Full-bridge strain gauge rail pressure sensor and pressure detection system |
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