CN217901092U - Pressure sensor with 4-20mA current output - Google Patents
Pressure sensor with 4-20mA current output Download PDFInfo
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- CN217901092U CN217901092U CN202221915000.0U CN202221915000U CN217901092U CN 217901092 U CN217901092 U CN 217901092U CN 202221915000 U CN202221915000 U CN 202221915000U CN 217901092 U CN217901092 U CN 217901092U
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Abstract
The utility model discloses a pressure sensor of 4-20mA current output relates to sensor technical field, through setting up first cavity and second cavity in the tube, thereby provide the space of installation to bottom circuit board and top layer circuit board, and bottom circuit board and top layer circuit board set up perpendicularly, and the components and parts that will generate heat are all installed in the top layer circuit board one side that deviates from the bottom circuit board, thereby make the components and parts that generate heat keep away from bottom circuit board and diffusion silicon pressure chip as far as possible, make the heat that the components and parts that generate heat produce more difficult the transmission to on bottom circuit board and diffusion silicon pressure chip, thereby greatly reduced the influence of heat to whole pressure sensor precision, make pressure sensor's output precision obtain the guarantee; meanwhile, the oil-filled core body and the tube shell form a closed metal cavity, so that a very good radiation interference resistant effect can be achieved, and the use stability and the practicability of the whole pressure sensor are further enhanced.
Description
Technical Field
The utility model relates to a sensor technical field especially relates to a pressure sensor of 4-20mA current output.
Background
Pressure sensors have a wide range of applications in the semiconductor field, and can be used for measuring and controlling pressure, altitude, acceleration, flow rate, liquid level, depth, and pressure, for example.
The pressure sensor generally includes a pressure sensitive element, a signal processing component and a packaging structure, wherein the pressure sensitive element can generate a pressure signal when being subjected to pressure of, for example, liquid or gas, the signal processing component can convert the pressure signal into a usable output electric signal according to a certain rule, and the packaging structure is used for packaging the pressure sensitive element and the signal processing component, so that the pressure sensitive element and the signal processing component can work stably.
The output signal of the traditional pressure sensor in China is generally a voltage signal at the mV level, a pressure head, an amplifying circuit, a shell and an electrical connector are added in front of and behind the pressure sensor to form a transmitter, and then a standard current signal can be output.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a 4-20mA current output's pressure sensor, including sealing body and the diffusion silicon pressure chip that sets up, the body includes mutual coaxial coupling's oil charge core and tube, the installation cavity that supplies the embedding of tube tip is seted up to the one end that the oil charge core length direction leaned on the tube, first cavity and second cavity have been seted up in the tube respectively, first cavity also is located the installation cavity simultaneously, be provided with the bottom circuit board that is used for installing the main chip in the first cavity, be provided with the top layer circuit board with bottom circuit board vertically along the length direction of tube in the second cavity, the top layer circuit board is used for the installation to have the circuit and the protective circuit of heating element, and the circuit that have heating element installs in the one side that the top layer circuit board deviates from the bottom circuit board, through row needle electric connection between top layer circuit board and the bottom circuit board.
The utility model discloses the technical scheme who further injects is:
furthermore, an insulating base plate parallel to the bottom layer circuit board is arranged in the installation cavity, and the insulating base plate abuts against the end portion, located in the installation cavity, of the tube shell.
In the pressure sensor with 4-20mA current output, the diameter of the insulating base plate is set to be equal to the inner diameter of the installation cavity.
In the pressure sensor for outputting the 4-20mA current, the oil-filled core body is provided with the metal tube leg for electrically connecting the diffused silicon pressure chip with the bottom circuit board.
The pressure sensor with the 4-20mA current output is characterized in that the pipe shell is made of copper.
In the pressure sensor for outputting the 4-20mA current, one end of the tube shell, which is far away from the oil-filled core body, is provided with a PH2.0 connector electrically connected with the top layer circuit board.
The beneficial effects of the utility model are that:
(1) The utility model discloses, through setting up first cavity and second cavity in the tube to provide the space of installation to bottom circuit board and top layer circuit board, and bottom circuit board and top layer circuit board set up perpendicularly, and the components and parts that will generate heat are all installed in the top layer circuit board and are kept away from one side of bottom circuit board, thereby make the components and parts that generate heat keep away from bottom circuit board and diffusion silicon pressure chip as far as possible, make the heat that the components and parts that generate heat produce more difficult the transmission to bottom circuit board and diffusion silicon pressure chip on, thereby greatly reduced the influence of heat to whole pressure sensor precision, make pressure sensor's output precision guarantee; meanwhile, the oil-filled core body and the tube shell form a closed metal cavity, so that a very good radiation interference resistant effect can be achieved, and the use stability and the practicability of the whole pressure sensor are further enhanced;
(2) The utility model discloses, the setting of insulating backing plate has improved the leakproofness of being connected between oil charge core and the tube on the one hand, and on the other hand also makes connection between the two inseparabler, also can further give off the thermal simultaneously and carry out the separation, further reduces the heat that components and parts gived off to diffusion silicon pressure chip's influence, further improves whole pressure sensor's use precision.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Wherein: 1. a body; 11. an oil-filled core; 111. a mounting cavity; 12. a pipe shell; 121. a first chamber; 122. a second chamber; 2. a diffused silicon pressure die; 3. a bottom layer circuit board; 4. a top layer circuit board; 5. arranging needles; 6. an insulating base plate; 7. a metal pipe leg; 8. PH2.0 connector.
Detailed Description
The pressure sensor for outputting 4-20mA current provided by the embodiment has a structure shown in fig. 1, and comprises a body 1 and a diffused silicon pressure chip 2, wherein the body 1 comprises an oil-filled core 11 and a tube shell 12 which are coaxially connected with each other, the tube shell 12 is made of copper, an installation cavity 111 for embedding the end part of the tube shell 12 is formed in one end, close to the tube shell 12, of the oil-filled core 11 in the length direction, a first cavity 121 and a second cavity 122 are respectively formed in the tube shell 12, and the first cavity 121 is also located in the installation cavity 111.
The bottom circuit board 3 used for installing the main chip is arranged in the first cavity 121, the top circuit board 4 perpendicular to the bottom circuit board 3 is arranged in the second cavity 122 along the length direction of the tube shell 12, the top circuit board 4 is used for installing a circuit with a heating element and a protection circuit, the circuit with the heating element is installed on one side, away from the bottom circuit board 3, of the top circuit board 4, and the top circuit board 4 is electrically connected with the bottom circuit board 3 through the pin header 5.
Be provided with the insulating backing plate 6 parallel with bottom circuit board 3 in the installation cavity 111, and insulating backing plate 6 contradicts in the tip that tube 12 is located installation cavity 111, and insulating backing plate 6's diameter sets up to the internal diameter that equals installation cavity 111, is provided with the tubular metal resonator leg 7 that is used for electric connection diffusion silicon pressure chip 2 and bottom circuit board 3 on the oil-filled core 11, and the one end that tube 12 deviates from oil-filled core 11 is provided with the PH2.0 connector 8 with 4 electric connection of top layer circuit board.
The first cavity 121 and the second cavity 122 are arranged in the tube shell 12, so that installation space is provided for the bottom circuit board 3 and the top circuit board 4, the bottom circuit board 3 and the top circuit board 4 are vertically arranged, and components which will generate heat are all installed on one side, away from the bottom circuit board 3, of the top circuit board 4, so that the heating components are far away from the bottom circuit board 3 and the diffused silicon pressure chip 2 as far as possible, heat generated by the heating components is more difficult to transfer to the bottom circuit board 3 and the diffused silicon pressure chip 2, the influence of the heat on the precision of the whole pressure sensor is greatly reduced, and the output precision of the pressure sensor is guaranteed; meanwhile, the oil-filled core body 11 and the tube shell 12 form a closed metal cavity, so that a very good radiation interference resistance effect can be achieved, and the use stability and the practicability of the whole pressure sensor are further enhanced;
the setting of insulating backing plate 6 has improved the leakproofness of being connected between oil-filled core 11 and the tube 12 on the one hand, and on the other hand also makes connection between the two inseparabler, also can further carry out the separation to thermal giving off simultaneously, further reduces the influence of the heat that components and parts distribute to diffusion silicon pressure chip 2, further improves whole pressure sensor's use precision.
In addition to the above embodiments, the present invention may have other embodiments; all the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (6)
1. The pressure sensor for outputting the 4-20mA current comprises a body (1) and a diffused silicon pressure chip (2) which are arranged in a closed mode, and is characterized in that: the body (1) comprises an oil-filled core body (11) and a tube shell (12) which are coaxially connected with each other, a mounting cavity (111) for embedding the end part of the tube shell (12) is formed in one end, close to the tube shell (12), of the oil-filled core body (11), a first cavity (121) and a second cavity (122) are formed in the tube shell (12) respectively, the first cavity (121) is also located in the mounting cavity (111), a bottom circuit board (3) used for mounting a main chip is arranged in the first cavity (121), a top circuit board (4) perpendicular to the bottom circuit board (3) is arranged in the second cavity (122) along the length direction of the tube shell (12), the top circuit board (4) is used for mounting a circuit with heating components and a protection circuit, the circuit with the heating components is mounted on one side, deviating from the bottom circuit board (3), of the top circuit board (4) and the bottom circuit board (3) are electrically connected through a pin header (5).
2. A 4-20mA current output pressure sensor as claimed in claim 1 wherein: an insulating pad (6) parallel to the bottom layer circuit board (3) is arranged in the mounting cavity (111), and the insulating pad (6) abuts against the end part, located in the mounting cavity (111), of the pipe shell (12).
3. A 4-20mA current output pressure sensor as claimed in claim 2 wherein: the diameter of the insulating backing plate (6) is set to be equal to the inner diameter of the installation cavity (111).
4. A 4-20mA current output pressure sensor as claimed in claim 1 wherein: and the oil-filled core body (11) is provided with a metal pipe leg (7) for electrically connecting the diffused silicon pressure chip (2) with the bottom circuit board (3).
5. A 4-20mA current output pressure sensor as claimed in claim 2 wherein: the tube shell (12) is made of copper (12).
6. A4-20 mA current output pressure sensor as claimed in claim 5, wherein: and one end of the tube shell (12) departing from the oil-filled core body (11) is provided with a PH2.0 connector (8) electrically connected with the top-layer circuit board (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221915000.0U CN217901092U (en) | 2022-07-21 | 2022-07-21 | Pressure sensor with 4-20mA current output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221915000.0U CN217901092U (en) | 2022-07-21 | 2022-07-21 | Pressure sensor with 4-20mA current output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217901092U true CN217901092U (en) | 2022-11-25 |
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ID=84135514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221915000.0U Active CN217901092U (en) | 2022-07-21 | 2022-07-21 | Pressure sensor with 4-20mA current output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217901092U (en) |
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2022
- 2022-07-21 CN CN202221915000.0U patent/CN217901092U/en active Active
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