CN217930645U - Pressure detecting sensor - Google Patents
Pressure detecting sensor Download PDFInfo
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- CN217930645U CN217930645U CN202222236076.7U CN202222236076U CN217930645U CN 217930645 U CN217930645 U CN 217930645U CN 202222236076 U CN202222236076 U CN 202222236076U CN 217930645 U CN217930645 U CN 217930645U
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- silica gel
- pressure detection
- transmission seat
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Abstract
The utility model relates to a fluid pressure detection technical field discloses a pressure detection sensor, including signal processing circuit and silica gel transmission seat, the inside transmission chamber that is equipped with of silica gel transmission seat, silica gel transmission seat is equipped with the seal groove in transmission chamber periphery, be equipped with the sealing washer in the seal groove, silica gel transmission seat top is equipped with the PCB board, the PCB board covers the transmission chamber, the bottom surface of PCB board is equipped with the pressure detection chip, signal processing circuit sets up the top surface at the PCB board, be connected with pressure detection chip electricity, the bleeder vent has been seted up at the position of pressure detection chip to the PCB board, the bleeder vent runs through the PCB board, when in-service use, owing to be applied to low fluid pressure's detection occasion, for the transmission seat that adopts the oil charge core, the utility model discloses a pressure detection sensor directly has set up the PCB board on silica gel transmission seat, need not additionally set up the base, be equivalent to sealing through the transmission chamber of PCB board to silica gel transmission seat, overall structure is simple.
Description
Technical Field
The utility model relates to a liquid pressure detects technical field, concretely relates to pressure detection sensor.
Background
At present, the pressure detection is carried out by adopting a transmitter of an oil-filled core body in the field of liquid pressure detection, the structure of the transmitter of the existing oil-filled core body comprises a metal transmitting seat, then a metal film sheet is welded at the bottom of the metal transmitting seat, a base is arranged at the top of the metal transmitting seat, and a PCB circuit board is arranged on the base. The existing oil-filled core body has the following defects in actual use:
1. the device is suitable for high-pressure detection occasions, mainly detects pressure values above 200kpa, and when the device is used for low-pressure detection occasions such as pressure detection below 100kpa, the detection precision is low due to low sensitivity of the metal thin film to pressure, so that the device cannot be suitable for low-pressure detection occasions;
2. overall structure is complicated, and the preparation technology is many, need use professional equipment to make, and the cost of manufacture is high, is unfavorable for the assembly, because metal transfer seat and metal film piece welding have the risk of oil leak after long-time the use moreover.
SUMMERY OF THE UTILITY MODEL
In view of the deficiency of the background art, the utility model provides a pressure detection sensor suitable for a simple structure, be applicable to low liquid pressure detection.
For solving the technical problem, the utility model provides a following technical scheme: pressure measurement sensor, including signal processing circuit and silica gel transmission seat, the inside transmission chamber that is equipped with of silica gel transmission seat, silica gel transmission seat is in transmission chamber periphery is equipped with the seal groove, be equipped with the sealing washer in the seal groove, silica gel transmission seat top is equipped with the PCB board, the PCB board covers the transmission chamber, the bottom surface of PCB board is equipped with the pressure detection chip, signal processing circuit sets up the top surface of PCB board, with pressure detection chip electricity is connected, the PCB board is in the bleeder vent has been seted up to the position of pressure detection chip, the bleeder vent runs through the PCB board is disposed in convey external atmospheric pressure to the first stress surface of pressure detection chip.
In a certain embodiment, the PCB board is further provided with a signal connecting socket, and a connecting terminal of the signal connecting socket is electrically connected to the signal processing circuit.
In one embodiment, a support member is arranged in the side wall of the silica gel transmitting seat.
In one embodiment, the bottom of the silica gel transfer seat is in an inverted truncated cone shape.
In one embodiment, the PCB board is provided with a silicone oil injection hole.
In a certain implementation mode, the utility model discloses still include the input joint, input chamber and installation cavity have been seted up in the input joint, the input chamber with the installation cavity intercommunication, silica gel transmission seat installs in the installation cavity, silica gel transmission seat back of the body leaves the one side of PCB board is located the installation cavity is close to one side of input chamber.
In a certain embodiment, a ventilation cover is arranged on the top of the PCB and covers the ventilation holes, a second ventilation hole is arranged on the top of the ventilation cover, and a sealing adhesive layer is arranged on the top surface of the PCB and has a height lower than that of the ventilation cover.
In one embodiment, a gland is provided inside the mounting cavity above the PCB board.
In certain embodiments, the gland is threadably coupled to a sidewall of the mounting cavity.
Compared with the prior art, the utility model the beneficial effect who has is: firstly, compared with a transmission seat adopting an oil-filled core body, the pressure detection sensor is applied to the detection occasion of low liquid pressure, the pressure detection sensor of the utility model is directly provided with a PCB on the silica gel transmission seat, does not need to additionally provide a base, is equivalent to sealing a transmission cavity of the silica gel transmission seat through the PCB, and has simple integral structure; secondly through adopting silica gel to become to send the seat to contain oily medium, in the preparation the utility model discloses the welding step of the metal diaphragm of changer and the welding step of base have been saved in the time, simple manufacture, and need not adopt welding equipment, the cost of manufacture is low.
Drawings
FIG. 1 is a schematic structural diagram of a silica gel transfer seat in an embodiment;
FIG. 2 is a schematic structural diagram of a pressure detection chip mounted on the bottom of a PCB in an embodiment;
FIG. 3 is a schematic top view of a PCB board in an embodiment;
FIG. 4 is a schematic structural diagram of the PCB board of FIG. 3 with a ventilation cover mounted thereon;
FIG. 5 is a schematic structural view of a PCB mounted on the top of a silica gel transmission seat;
FIG. 6 is a schematic structural diagram of an input connector;
FIG. 7 is a schematic view of the structure shown in FIG. 5 installed on an input street;
fig. 8 is a schematic structural diagram of the input street with the gland installed.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, 2, 3 and 5, the pressure detection sensor includes a signal processing circuit 7 and a silica gel transmission seat 1, the bottom of the silica gel transmission seat 1 is equivalent to a silica gel sensitive film, a transmission cavity 2 is arranged inside the silica gel transmission seat 1, the silica gel transmission seat 1 is provided with a sealing groove 3 at the periphery 2 of the transmission cavity, a sealing ring is arranged in the sealing groove 3 (the sealing groove 3 is not labeled for convenience of displaying, but it is clear for those skilled in the art to install the sealing ring in the sealing groove 3), a PCB 4 is arranged at the top of the silica gel transmission seat 1, the PCB 4 covers the transmission cavity 2, a pressure detection chip 8 is arranged at the bottom of the PCB 4, the signal processing circuit 7 is arranged at the top of the PCB 4 and is electrically connected with the pressure detection chip 8, a vent 5 is arranged at the position of the pressure detection chip 8 on the PCB 4, the vent 5 penetrates through the PCB 4 and is arranged at a first stressed surface for transmitting external atmospheric pressure to the pressure detection chip 8.
In actual use, the transmission cavity 2 is internally provided with a transmission layer, and the transmission layer can adopt oil. When external liquid pressure impacts the bottom of the silica gel transmitting seat 1, the transmitting layer transmits the pressure to a second stress surface, namely a detection surface, of the pressure detection chip 8, the first stress surface of the pressure detection chip 8 is a reference surface, when external pressure is input into the pressure detection chip 8, an electric signal is output, the signal processing circuit 7 converts the electric signal output by the pressure detection chip 8 into a voltage signal or a current signal which is positively correlated with the input pressure of the signal processing circuit, or converts the electric signal output by the pressure detection chip 8 into a voltage signal or a current signal which is negatively correlated with the input pressure of the signal processing circuit.
As shown in fig. 5, a silicone oil injection hole 15 is further formed in the PCB 4, silicone oil is injected into the transmission cavity 2 through the silicone oil injection hole 15, after the transmission cavity 2 is filled with silicone oil, the silicone oil injection hole 15 is filled and sealed, and at this time, the transmission cavity 2 is sealed by the PCB 4.
In practical use, in order to facilitate the interaction between the signal processing circuit 7 and peripheral circuits, the PCB board 4 is further provided with a signal connecting socket 6, and a connecting terminal of the signal connecting socket 6 is electrically connected with the signal processing circuit 7. Specifically, the signal output terminal, the power supply terminal, and the ground terminal of the signal processing circuit 7 are electrically connected to the connection terminals of the connector socket 6, respectively, and the peripheral circuit supplies power to the signal processing circuit 7 through the connection terminals of the signal connector socket 6 and reads the output signal of the signal processing circuit 7.
As shown in fig. 6, in this embodiment, the present invention further includes an input joint 10, an input cavity 12 and an installation cavity 11 are formed in the input joint 10, and the input cavity 12 is communicated with the installation cavity 11.
As shown in fig. 7, the silica gel transmitting base 1 is installed in the installation cavity 11, and one side of the silica gel transmitting base 11 departing from the PCB 4 is located in the installation cavity 11 near one side of the input cavity 12. In actual use, external liquid pressure is input to the bottom of the silica gel transfer seat 1 through the input cavity 12.
As shown in fig. 1 and 5, in the present embodiment, in order to facilitate the installation of the silicone rubber transfer base 1 into the mounting cavity 11, the bottom of the silicone rubber transfer base 1 is obliquely arranged and has a rounded truncated cone shape. During the in-service use, set up to the form of falling the round platform through letting the bottom of silica gel transmission seat 1, can adorn the installation cavity 11 bottom with silica gel transmission seat 1 well, ensure whole pressure detection sensor's leakproofness.
In addition, in this embodiment, a supporting component is arranged in the side wall of the silica gel transmitting seat 1, and the supporting component may be a metal sheet. In actual use, the supporting strength of the silica gel transmitting seat 1 can be improved through the supporting component, and external stress is prevented from being applied to the pressure detection chip 8 through the silica gel transmitting seat 1.
In addition, after the silica gel transmitting base 1 is installed in the installation cavity 11, in order to further realize the sealing of the transmitting cavity 2, as shown in fig. 4, a ventilation cover 9 is arranged on the top of the PCB 4, the ventilation cover 9 covers the ventilation holes 5, a second ventilation hole 14 is arranged on the top of the ventilation cover 9, and a sealant layer (not labeled in the figure) is arranged on the top surface of the PCB 4 and is lower than the top surface of the ventilation cover 9. In actual use, since the height of the sealant layer is lower than the top surface of the air permeable cover 9, the external atmosphere can enter the first stressed surface of the pressure detecting chip 8 through the second air vent 14 and the air vent 5.
In this embodiment, in order to further fix the PCB 4, as shown in fig. 8, a pressing cover 13 is disposed above the PCB 4 inside the mounting cavity 11, and the signal connecting socket 6 passes through the bottom of the pressing cover 13. Specifically, the gland 13 is screwed with the side wall of the mounting chamber 11.
In summary, because the pressure detection sensor is applied to the detection occasion of low liquid pressure, compared with the transmission seat adopting the oil-filled core body, the pressure detection sensor of the utility model directly arranges the PCB 4 on the silica gel transmission seat 1, and does not need to additionally arrange a base, which is equivalent to sealing the transmission cavity 2 of the silica gel transmission seat 1 through the PCB 4, and the whole structure is simple; secondly through adopting silica gel transmission seat 1 to hold oily medium, in the preparation the utility model discloses the welding step of the metal diaphragm of changer and the welding step of base have been saved in the time, simple manufacture, and need not adopt welding equipment, the cost of manufacture is low.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.
Claims (9)
1. Pressure measurement sensor, including signal processing circuit, its characterized in that, including silica gel transmission seat, the inside transmission chamber that is equipped with of silica gel transmission seat, silica gel transmission seat is in transmission chamber periphery is equipped with the seal groove, be equipped with the sealing washer in the seal groove, silica gel transmission seat top is equipped with the PCB board, the PCB board covers the transmission chamber, the bottom surface of PCB board is equipped with the pressure detection chip, signal processing circuit sets up the top surface of PCB board, with the pressure detection chip electricity is connected, the PCB board is in the bleeder vent has been seted up to the position of pressure detection chip, the bleeder vent runs through the PCB board is disposed in external atmospheric pressure conveying to the first stress surface of pressure detection chip.
2. The pressure detecting sensor according to claim 1, wherein a signal connecting socket is further provided on the PCB, and a connecting terminal of the signal connecting socket is electrically connected to the signal processing circuit.
3. The pressure detecting sensor according to claim 1, wherein a support member is provided in a side wall of the silicone transmission base.
4. The pressure detecting sensor according to claim 1, wherein a bottom of the silicone transmission seat is rounded.
5. The pressure sensor of claim 1, wherein the PCB board has a silicone oil injection hole formed therein.
6. The pressure detection sensor of any one of claims 1-5, further comprising an input connector, wherein an input cavity and a mounting cavity are formed in the input connector, the input cavity is communicated with the mounting cavity, the silica gel transmission seat is mounted in the mounting cavity, and a surface of the silica gel transmission seat, which is away from the PCB, is located on a side of the mounting cavity, which is close to the input cavity.
7. The pressure detecting sensor according to claim 6, wherein a ventilation cover is disposed on a top of the PCB, the ventilation cover covers the ventilation hole, a second ventilation hole is disposed on a top of the ventilation cover, and a sealant layer is disposed on a top surface of the PCB and has a height lower than that of the ventilation cover.
8. The pressure detection sensor of claim 7, wherein a gland is provided inside the mounting cavity above the PCB board.
9. The pressure detection sensor of claim 8, wherein the gland is threadably coupled to a sidewall of the mounting cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222236076.7U CN217930645U (en) | 2022-08-24 | 2022-08-24 | Pressure detecting sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222236076.7U CN217930645U (en) | 2022-08-24 | 2022-08-24 | Pressure detecting sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217930645U true CN217930645U (en) | 2022-11-29 |
Family
ID=84170138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222236076.7U Active CN217930645U (en) | 2022-08-24 | 2022-08-24 | Pressure detecting sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217930645U (en) |
-
2022
- 2022-08-24 CN CN202222236076.7U patent/CN217930645U/en active Active
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