CN212779708U - Pressure sensor with contact stabilizing device - Google Patents
Pressure sensor with contact stabilizing device Download PDFInfo
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- CN212779708U CN212779708U CN202021900226.4U CN202021900226U CN212779708U CN 212779708 U CN212779708 U CN 212779708U CN 202021900226 U CN202021900226 U CN 202021900226U CN 212779708 U CN212779708 U CN 212779708U
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Abstract
The utility model relates to the relevant technical field of pressure sensors, in particular to a pressure sensor with a contact stabilizing device, which comprises a sensor shell and a pressure guide rod arranged inside the sensor shell, wherein the sensor shell is of a section of tubular structure, the rear end of a tube body is the bottom surface of a closed state, a mounting groove is arranged on the bottom surface of the tube body, and a piezoresistor is fixedly arranged on the groove opening ground of the mounting groove; the sensor shell of the pressure sensor is arranged into a pipe cavity structure with a closed rear end, the bottom surface of the pipe cavity is provided with the mounting groove, the piezoresistor is arranged in the notch of the piezoresistor, the inner side wall of the sensor shell is provided with the annular groove, the side wall of the notch of the sensor shell is connected with the side wall of the rod body of the pressure guide rod through the air cavity diaphragm, the piezoresistor is pressed through the pressure change in the cavity, and compared with the traditional detection mode that the pressure point is directly contacted with the piezoresistor, the pressure distribution of the piezoresistor is more uniform.
Description
Technical Field
The utility model relates to a pressure sensor correlation technique field specifically is a pressure sensor with contact stabilising arrangement.
Background
A pressure sensor is a device or apparatus that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule, and the pressure sensor generally comprises a pressure sensitive element and a signal processing unit. According to different test pressure types, the pressure sensor can be divided into a gauge pressure sensor, a differential pressure sensor and an absolute pressure sensor; the pressure sensor is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to various industries such as water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military industry, petrifaction, oil wells, electric power, ships, machine tools, pipelines and the like; but it all adopts direct and pressure detection position direct contact usually to traditional pressure sensor's pressure receiving unit, but because the direction of pressure probably has certain inclination with piezo-resistor's the direction that sets up to lead to piezo-resistor's actual response pressure value and actual value to have the deviation, for this reason, the utility model provides a pressure sensor with contact stabilising arrangement is used for solving above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pressure sensor with contact stabilising arrangement to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a pressure sensor with a contact stabilizing device comprises a sensor shell and a pressure guide rod arranged in the sensor shell, wherein the sensor shell is of a section of tubular structure, the rear end of a tube body of the sensor shell is the bottom surface of a closed state, a mounting groove is formed in the bottom surface of the sensor shell, a piezoresistor is fixedly mounted on the groove opening ground of the mounting groove, positive and negative interfaces of the piezoresistor are respectively electrically connected with positive and negative power supply wiring ends on the sensor structure, the thickness of the piezoresistor is smaller than the depth of the mounting groove, an annular groove is formed in the inner side wall of the sensor shell, a first ball groove is formed in the rear end of the annular groove, a second ball groove is formed in the front end of the annular groove, the pressure guide rod is of a section of cylindrical structure, a cylinder of the pressure guide rod is movably mounted in an inner cavity of the sensor shell, and the bottom surface, and the middle end of the side wall of the pressure guide rod is connected with the side wall of the notch of the annular groove through the air cavity diaphragm.
Preferably, the diameter of the pressure guide rod is smaller than the cavity inner cavity of the sensor housing, the air cavity diaphragm is made of elastic rubber materials, the diaphragm body is annular, the inner end and the outer end of the air cavity diaphragm are fixedly connected with the outer side wall of the pressure guide rod and the inner wall of the cavity of the sensor housing respectively, and the cavity of the sensor housing at the rear end of the air cavity diaphragm is a sealed cavity.
Preferably, a plurality of groups of the first ball grooves and the second ball grooves are formed, the positions of the notches of the first ball grooves and the second ball grooves correspond to each other, the outer side wall of the rod body of the pressure guide rod is provided with a spherical groove, the positions of the spherical grooves correspond to the positions of the notches of the first ball grooves and the second ball grooves, balls are embedded into the notches of the spherical grooves, and the ball structures at the front end and the rear end of the pressure guide rod are respectively arranged in the notches of the second ball grooves and the first ball grooves in a rolling mode.
Preferably, bearing structure comprises preceding position backup pad, back position backup pad and supporting spring combination, preceding position backup pad and back position backup pad are the same annular plate structure of plate body size, and are connected through supporting spring between its two plate bodys, supporting spring is in the front and is provided with four groups with equidistant between the back position backup pad, and the front surface of preceding position backup pad and the bottom fixed surface of pressure guide arm are connected, and the rear surface of back position backup pad and the cavity bottom surface fixed connection of sensor housing, and the aperture of the plate body intermediate pass-through hole of back position backup pad is greater than the notch diameter of mounting groove.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the pressure sensor comprises a pressure sensor body, a sensor shell, a pressure guide rod, a pressure-sensitive resistor, an air cavity diaphragm, a pressure guide rod, a pressure-sensitive resistor and a pressure sensor, wherein the sensor shell of the pressure sensor is arranged into a pipe cavity structure with a closed rear end, the bottom surface of the pipe cavity is provided with a mounting groove, the pressure-sensitive resistor is arranged in a groove opening of the pressure-sensitive resistor, the inner side wall of the sensor shell is provided with an annular groove, and the side wall of the groove opening of the sensor shell is connected with the side wall of the rod body of the pressure guide rod through the air cavity diaphragm, so that the pressure-sensitive resistor is pressed through the pressure change in the cavity;
2. first ball groove and two ball grooves are set on the inner side wall of the cavity of the sensor shell, and spherical grooves are set on the outer side wall of the pressure guide rod, balls are embedded in the spherical grooves and are arranged in the notches of the first ball grooves and the two ball grooves in a sliding mode, so that the friction force between the pressure guide rod and the inner side wall of the sensor shell is effectively reduced, and the accuracy of measured values is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a half-sectional view of the sensor housing of the present invention;
FIG. 3 is a schematic view of the internal structure of the sensor housing of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 3;
fig. 5 is a schematic view of the supporting structure of the present invention.
In the figure: the sensor comprises a sensor shell 1, a pressure guide rod 2, a mounting groove 3, an annular groove 4, a first ball groove 5, a second ball groove 6, a spherical groove 7, a ball 8, an air cavity diaphragm 9, a support structure 10, a front support plate 11, a rear support plate 12, a support spring 13 and a piezoresistor 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a pressure sensor with a contact stabilizing device comprises a sensor shell 1 and a pressure guide rod 2 arranged inside the sensor shell 1, wherein the sensor shell 1 is of a section of tubular structure, the rear end of a tube body of the sensor shell is a closed bottom surface, a mounting groove 3 is formed in the bottom surface of the tube body, a piezoresistor 14 is fixedly mounted on the notch ground of the mounting groove 3, positive and negative interfaces of the piezoresistor 14 are respectively electrically connected with positive and negative power supply wiring ends on the sensor structure, the thickness of the piezoresistor 14 is smaller than the depth of the mounting groove 3, an annular groove 4 is formed in the inner side wall of the sensor shell 1, a first ball groove 5 is arranged at the rear end of the annular groove 4, a second ball groove 6 is arranged at the front end of the annular groove 4, the pressure guide rod 2 is of a section of cylindrical structure, a cylinder of the cylinder is movably mounted in an inner cavity of the sensor shell 1, and the bottom surface of the pressure, and the middle end of the side wall of the pressure guide rod 2 is connected with the side wall of the notch of the annular groove 4 through an air cavity diaphragm 9.
Furthermore, the diameter of the pressure guide rod 2 is smaller than the cavity inner cavity of the sensor housing 1, the air cavity diaphragm 9 is made of elastic rubber material, the diaphragm body is annular, the inner end and the outer end of the air cavity diaphragm are respectively fixedly connected with the outer side wall of the pressure guide rod 2 and the inner wall of the cavity of the sensor housing 1 in an adhesive manner, the cavity of the sensor housing 1 at the rear end of the air cavity diaphragm 9 is a sealed cavity, the sensor housing 1 of the pressure sensor is arranged into a pipe cavity structure with a closed rear end, the bottom surface of the pipe cavity is provided with an installation groove 3, the piezoresistor 14 is arranged in the notch of the sensor housing, the inner side wall of the sensor housing 1 is provided with an annular groove 4, the side wall of the notch of the sensor housing is connected with the rod body side wall of the pressure guide rod 2 through the air cavity diaphragm 9, so that the piezoresistor 14 is pressed through the pressure change in the cavity, compared with the traditional detection mode that, the pressure distribution on the piezoresistor 14 is more uniform, and the problem of larger detection numerical error caused by the deviation of the force application direction can not occur;
furthermore, a plurality of sets of first ball grooves 5 and second ball grooves 6 are formed, the positions of the first ball grooves 5 correspond to the positions of the notches of the second ball grooves 6, the outer side wall of the pressure guide rod 2 is provided with a spherical groove 7, the positions of the spherical grooves 7 correspond to the positions of the notches of the first ball grooves 5 and the second ball grooves 6, balls 8 are embedded in the notches of the spherical grooves 7, ball structures at the front end and the rear end of the pressure guide rod 2 are respectively arranged in the notches of the second ball grooves 6 and the first ball grooves 5 in a rolling manner, the first ball grooves 5 and the second ball grooves 6 are formed in the inner side wall of the cavity of the sensor housing 1, the spherical grooves 7 are formed in the outer side wall of the pressure guide rod 2, the balls 8 are arranged in the spherical grooves 7 in a rolling manner, and the balls 8 are arranged in the notches of the first ball grooves 5 and the second ball grooves 6 in a sliding manner, so that the friction force between the inner side wall of the pressure guide rod 2 and the sensor housing 1 is effectively reduced, thereby improving the accuracy of the measured value;
furthermore, the supporting structure 10 is composed of a front supporting plate 11, a rear supporting plate 12 and supporting springs 13, the front supporting plate 11 and the rear supporting plate 12 are of annular plate structures with the same plate body size, the two plate bodies are connected through the supporting springs 13, the supporting springs 13 are arranged in four groups between the front supporting plate 11 and the rear supporting plate 12 at equal intervals, the front surface of the front supporting plate 11 is fixedly connected with the bottom end surface of the pressure guide rod 2, the rear surface of the rear supporting plate 12 is fixedly connected with the bottom surface of the cavity of the sensor shell 1, the aperture of a through hole in the middle of the plate body of the rear supporting plate 12 is larger than the diameter of the notch of the mounting groove 3, and the internal elements can be ensured to be normally reset;
the working principle is as follows: in practical use, when an external force is applied to the front end of the pressure guide rod 2 on the pressure sensor, due to the action of the pressure, the pressure guide rod 2 slides inwards under the action of the ball 8 between the sensor housing 1 and the pressure guide rod 2, so that the size of the cavity of the sensor housing 1 at the rear end of the air cavity diaphragm 9 is changed through the movement action of the pressure guide rod 2, the pressure of the gas inside the cavity at the rear end part of the cavity is changed, the size of the force applied to the surface of the piezoresistor 14 is changed through the change of the air pressure value of the pressure guide rod, the pressure applied to the front end of the rod body of the pressure guide rod 2 is measured, compared with the traditional detection mode that the pressure is applied to the piezoresistor 14 in direct contact, the pressure distribution on the piezoresistor 14 is more uniform, and the problem that the detection numerical error is larger due to the deviation of the force application, therefore, the measuring process of the pressure sensor is more stable.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a pressure sensor with contact stabilising arrangement, includes sensor housing (1) and sets up pressure guide pole (2) inside sensor housing (1), its characterized in that: the sensor shell (1) is of a section of tubular structure, the rear end of a tube body of the sensor shell is a closed bottom surface, the bottom surface of the tube body is provided with a mounting groove (3), a piezoresistor (14) is fixedly mounted on the ground of a notch of the mounting groove (3), positive and negative interfaces of the piezoresistor (14) are respectively electrically connected with positive and negative power supply wiring ends on the sensor structure, the thickness of the piezoresistor (14) is smaller than the depth of the mounting groove (3), the inner side wall of the sensor shell (1) is provided with an annular groove (4), the rear end of the annular groove (4) is provided with a first ball groove (5), the front end of the annular groove (4) is provided with a second ball groove (6), the pressure guide rod (2) is of a section of cylindrical structure, a cylinder of the pressure guide rod is movably mounted in an inner cavity of the sensor shell (1), and the bottom surface of the pressure guide rod (2) is connected with the bottom surface, and the middle end of the side wall of the pressure guide rod (2) is connected with the side wall of the notch of the annular groove (4) through an air cavity diaphragm (9).
2. A pressure sensor with contact stabilization, as claimed in claim 1, wherein: the diameter of the pressure guide rod (2) is smaller than the cavity inner cavity of the sensor housing (1), the air cavity diaphragm (9) is made of elastic rubber materials, the diaphragm body is annular, the inner end and the outer end of the air cavity diaphragm are fixedly connected with the outer side wall of the pressure guide rod (2) and the inner wall of the cavity of the sensor housing (1) respectively, and the cavity of the sensor housing (1) at the rear end of the air cavity diaphragm (9) is a sealed cavity.
3. A pressure sensor with contact stabilization, as claimed in claim 1, wherein: the ball guide rod is characterized in that multiple groups of first ball grooves (5) and second ball grooves (6) are formed, the positions of the notches of the first ball grooves (5) and the second ball grooves (6) are corresponding, spherical grooves (7) are formed in the outer side wall of the rod body of the pressure guide rod (2), the positions of the spherical grooves (7) are corresponding to the positions of the notches of the first ball grooves (5) and the second ball grooves (6), balls (8) are embedded into the notches of the spherical grooves (7), and the ball structures at the front end and the rear end of the pressure guide rod (2) are respectively arranged in the notches of the second ball grooves (6) and the first ball grooves (5) in a rolling mode.
4. A pressure sensor with contact stabilization, as claimed in claim 1, wherein: bearing structure (10) are by preceding position backup pad (11), back position backup pad (12) and supporting spring (13) combination constitution, preceding position backup pad (11) and back position backup pad (12) are the same annular plate structure of plate body size, and are connected through supporting spring (13) between its two plate bodys, supporting spring (13) are provided with four groups in the same interval between preceding position backup pad (11) and back position backup pad (12), and the front surface of preceding position backup pad (11) is connected with the bottom fixed surface of pressure guide arm (2), and the rear surface of back position backup pad (12) and the cavity bottom surface fixed connection of sensor housing (1), and the aperture of the middle through-hole of the plate body of back position backup pad (12) is greater than the notch diameter of mounting groove (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021900226.4U CN212779708U (en) | 2020-09-03 | 2020-09-03 | Pressure sensor with contact stabilizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021900226.4U CN212779708U (en) | 2020-09-03 | 2020-09-03 | Pressure sensor with contact stabilizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212779708U true CN212779708U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021900226.4U Active CN212779708U (en) | 2020-09-03 | 2020-09-03 | Pressure sensor with contact stabilizing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323415A (en) * | 2021-12-21 | 2022-04-12 | 兰灵才 | Pressure sensor with overpressure alarm function |
| CN114323415B (en) * | 2021-12-21 | 2024-04-26 | 哈工科讯(沈阳)工业技术研究院有限公司 | Pressure sensor with overpressure alarm function |
-
2020
- 2020-09-03 CN CN202021900226.4U patent/CN212779708U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323415A (en) * | 2021-12-21 | 2022-04-12 | 兰灵才 | Pressure sensor with overpressure alarm function |
| CN114323415B (en) * | 2021-12-21 | 2024-04-26 | 哈工科讯(沈阳)工业技术研究院有限公司 | Pressure sensor with overpressure alarm function |
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