CN212871591U - Pressure transmitter with anti-electromagnetic interference function - Google Patents
Pressure transmitter with anti-electromagnetic interference function Download PDFInfo
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- CN212871591U CN212871591U CN202021174985.7U CN202021174985U CN212871591U CN 212871591 U CN212871591 U CN 212871591U CN 202021174985 U CN202021174985 U CN 202021174985U CN 212871591 U CN212871591 U CN 212871591U
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Abstract
The utility model discloses a pressure transmitter with anti-electromagnetic interference function, relating to the technical field of pressure transmitters, solving the technical problem that the sensitivity and the accuracy are reduced because the prior pressure transmitter can be interfered by an external magnetic field in the processes of signal transmission and model conversion, the utility model comprises a shell and a pipe connecting mouth, wherein a pressure sensor and a circuit board are arranged in the shell, an interference protective net is arranged in the shell, the interference protective net is a cylindrical metal net, the circuit board is fixedly arranged in the interference protective net, an amplifier, an analog-to-digital converter and a transformer module are welded on the circuit board, an input electrode of the amplifier is connected with an output electrode of the pressure sensor through a lead, an output electrode of the amplifier is connected with an input electrode of the analog-to-digital converter through a lead, and a voltage output electrode of the transformer module is connected with power supply electrodes of the pressure sensor, the amplifier and the analog-to-digital converter through leads; the utility model has the advantages of simple structure, strong interference resistance and the like.
Description
Technical Field
The utility model relates to a gas table technical field, more specifically relate to a pressure transmitter with anti-electromagnetic interference function.
Background
A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission.
It can convert the physical pressure parameters of gas, liquid, etc. sensed by the load cell sensor into standard electric signals (such as 4-20mADC, etc.) for secondary instruments such as indication alarm, recorder, regulator, etc. to measure, indicate and regulate the process.
The system comprises a plurality of industries such as railway transportation, intelligent building, production automatic control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and the like.
Pressure transmitters are classified into two types, electric and pneumatic. The electrodynamic type unified output signal is a direct current signal of 0-10 mA, 4-20mA or 1-5V, etc. The pneumatic unified output signal is gas pressure of 20-100 Pa.
The pressure transmitter can be divided into force (torque) balance type, capacitance type, inductance type, strain type, frequency type and the like according to different conversion principles, and the following briefly introduces the principles, structures, use, overhaul, check and other knowledge of several pressure (differential pressure) transmitters.
The pressure transmitter is mainly used for transmitting a pressure signal to electronic equipment, and then the principle of displaying the pressure on a computer is that: the pressure of an electronic signal, which is an electronic signal for converting a mechanical signal of the pressure of water pressure into current (4-20mA), is in a linear relationship with the voltage or the current, and is generally in a direct ratio relationship. Therefore, the voltage or current output by the transmitter is increased along with the increase of the pressure, so that two pressures of a measured medium of the pressure transmitter with a relation of the pressure and the voltage or the current are obtained and are introduced into a high pressure chamber and a low pressure chamber, and the pressure of the low pressure chamber adopts the atmospheric pressure or vacuum, acts on the isolating diaphragms on two sides of the instant sensing element and is transmitted to two sides of the measuring diaphragm through the isolating diaphragms and filling liquid in the element.
The pressure transmitter is a capacitor formed by a measuring diaphragm and electrodes on insulating sheets on two sides. When the pressures at two sides are not consistent, the measuring diaphragm is caused to displace, the displacement is in direct proportion to the pressure difference, so that the capacitances at two sides are not equal, and the oscillation and demodulation links are adopted.
The existing pressure transmitter has no electromagnetic interference protection function, so that the existing pressure transmitter can be interfered by an external magnetic field in the processes of signal transmission and model conversion, and the sensitivity and the accuracy of the existing pressure transmitter are reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: in order to solve the current interference that pressure transmitter can receive external magnetic field in signal transmission and model conversion process, lead to the technical problem that its sensitivity and accuracy reduce, the utility model provides a pressure transmitter with anti-electromagnetic interference function.
The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:
the utility model provides a pressure transmitter with anti-electromagnetic interference function, includes the casing, and the casing front end is provided with the mouthpiece, is provided with pressure sensor and circuit board in the casing, and pressure sensor passes through the wire with the circuit board and is connected, be provided with the interference protection network in the casing, the interference protection network is the tube-shape metal mesh, and the circuit board is fixed to be set up in the interference protection network, and the welding has amplifier, analog-to-digital converter and transformer module on the circuit board, and the amplifier input pole passes through the wire with the pressure sensor output stage and is connected, and the output stage of amplifier passes through the wire with analog-to-digital converter's input pole and is connected, and the voltage output pole of transformer module passes through the wire with pressure sensor, amplifier and analog-to-.
Further, the casing includes installation piece, connecting block and blocking piece from a left side to the right side in proper order, and pressure sensor sets up in the installation piece, and interference protection network and circuit board all set up in the connecting block, the left end and the installation piece threaded connection of connecting block, the right-hand member and the blocking piece threaded connection of connecting block, and installation piece, connecting block and blocking piece are cylindrical structure.
Further, the fixed left end that sets up at the installation piece of filler neck, be provided with the pressure hole on the left end terminal surface of filler neck, the right-hand member terminal surface of installation piece is provided with the connecting block mounting hole, the connecting block mounting hole is the screw hole, the hole bottom of connecting block mounting hole is provided with the sensor mounting hole with the pressure hole switch-on, pressure sensor fixed mounting is in the sensor mounting hole, be provided with the left end external screw thread with the connecting block mounting hole assorted on the connecting block left end excircle, connecting block right-hand member terminal surface is provided with the wire clearing hole, connecting block right-hand member terminal surface is provided with the circuit board accommodation hole with the wire clearing hole switch-on, circuit board accommodation hole diameter is greater than wire clearing hole diameter, the setting of interference protection network is in the circuit board accommodation hole, connecting block right-hand member.
Further, still be provided with the spring in the circuit board accommodation hole, the one end and the interference protection network contact of spring, the other end and the shutoff piece contact of spring.
Furthermore, a wire protecting sleeve is arranged in the plugging block, and a lead passes through the wire protecting sleeve.
The utility model has the advantages as follows:
the utility model discloses a set up the metal interference protection network, let the changer in electromagnetic interference's environment, can shield external magnetic field, prevent that external magnetic field from influencing amplifier and analog-to-digital converter on the circuit board, the detection precision that leads to pressure transmitter reduces, disturb the medium that the protection network also regarded as fixed circuit board simultaneously, the circuit board is flat usually, will install very inconvenient fixed in the hole the inside, let the circuit board install in disturbing the protection network through setting up the interference protection network, the fixed circuit board of being convenient for, improve the assembly convenience.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the assembly structure of the present invention.
Reference numerals: the sensor comprises a 1-connecting pipe nozzle, a 2-mounting block, a 3-pressure sensor, a 4-sealing ring, a 5-connecting block, a 6-interference protective net, a 7-amplifier, an 8-circuit board, a 9-analog-to-digital converter, a 10-blocking block, 11-wires, 12-springs, 13-transformer modules, 14-sensor mounting holes, 15-connecting block mounting holes, 16-wire through holes, 17-circuit board accommodating holes, 18-connecting block matching threaded holes and 19-wire protection sleeves.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 to 2, this embodiment provides a pressure transmitter with anti-electromagnetic interference function, which includes a housing, a pipe connection nozzle 1 is disposed at the front end of the housing, a pressure sensor 3 and a circuit board 8 are disposed in the housing, the pressure sensor 3 is connected to the circuit board 8 through a wire, an interference protection net 6 is disposed in the housing, the interference protection net 6 is a cylindrical metal net, the circuit board 8 is fixedly disposed in the interference protection net 6, an amplifier 7, an analog-to-digital converter 9 and a transformer module 13 are welded on the circuit board 8, an input electrode of the amplifier 7 is connected to an output electrode of the pressure sensor 3 through a wire, an output electrode of the amplifier 7 is connected to an input electrode of the analog-to-digital converter 9 through a wire, a voltage output electrode of the transformer module 13 is connected to power supply electrodes of the pressure sensor 3, the wires 11 are electrically connected to the analog-to-digital converter 9 and the transformer module 13.
Example 2
As shown in fig. 1 to 2, this embodiment provides a pressure transmitter with anti-electromagnetic interference function, which includes a housing, a pipe connection nozzle 1 is disposed at the front end of the housing, a pressure sensor 3 and a circuit board 8 are disposed in the housing, the pressure sensor 3 is connected to the circuit board 8 through a wire, an interference protection net 6 is disposed in the housing, the interference protection net 6 is a cylindrical metal net, the circuit board 8 is fixedly disposed in the interference protection net 6, an amplifier 7, an analog-to-digital converter 9 and a transformer module 13 are welded on the circuit board 8, an input electrode of the amplifier 7 is connected to an output electrode of the pressure sensor 3 through a wire, an output electrode of the amplifier 7 is connected to an input electrode of the analog-to-digital converter 9 through a wire, a voltage output electrode of the transformer module 13 is connected to power supply electrodes of the pressure sensor 3, the wires 11 are electrically connected to the analog-to-digital converter 9 and the transformer module 13.
The casing includes installation piece 2, connecting block 5 and blocking piece 10 from a left side to the right side in proper order, and pressure sensor 3 sets up in installation piece 2, and interference protection net 6 and circuit board 8 all set up in connecting block 5, and the left end and the 2 threaded connection of installation piece of connecting block 5, the right-hand member and the 10 threaded connection of blocking piece of connecting block 5, installation piece 2, connecting block 5 and blocking piece 10 are cylindrical structure.
The fixed left end that sets up at installation piece 2 of filler pipe mouth 1, be provided with the pressure hole on the left end terminal surface of filler pipe mouth 1, the right-hand member terminal surface of installation piece 2 is provided with connecting block mounting hole 15, connecting block mounting hole 15 is the screw hole, the hole bottom of connecting block mounting hole 15 is provided with the sensor mounting hole 14 with the pressure hole switch-on, pressure sensor 3 fixed mounting is in sensor mounting hole 14, be provided with on the 5 left end excircle of connecting block with 15 assorted left end external screw threads of connecting block mounting hole, 5 right-hand member terminal surfaces of connecting block are provided with wire clearing hole 16, 5 right-hand member terminal surfaces of connecting block are provided with the circuit board accommodation hole 17 with 16 switch-on of wire clearing hole, circuit board accommodation hole 17 diameter is greater than wire clearing hole 16 diameter, interference protection net 6 sets up in circuit board accommodation hole 17, 5 right-hand member excircle of connecting block sets up the right.
Example 3
As shown in fig. 1 to 2, this embodiment provides a pressure transmitter with anti-electromagnetic interference function, which includes a housing, a pipe connection nozzle 1 is disposed at the front end of the housing, a pressure sensor 3 and a circuit board 8 are disposed in the housing, the pressure sensor 3 is connected to the circuit board 8 through a wire, an interference protection net 6 is disposed in the housing, the interference protection net 6 is a cylindrical metal net, the circuit board 8 is fixedly disposed in the interference protection net 6, an amplifier 7, an analog-to-digital converter 9 and a transformer module 13 are welded on the circuit board 8, an input electrode of the amplifier 7 is connected to an output electrode of the pressure sensor 3 through a wire, an output electrode of the amplifier 7 is connected to an input electrode of the analog-to-digital converter 9 through a wire, a voltage output electrode of the transformer module 13 is connected to power supply electrodes of the pressure sensor 3, the wires 11 are electrically connected to the analog-to-digital converter 9 and the transformer module 13.
A spring 12 is further arranged in the circuit board accommodating hole 17, one end of the spring 12 is in contact with the interference protection net 6, the other end of the spring 12 is in contact with the plugging block 10, a wire protecting sleeve 19 is arranged in the plugging block 10, a wire 11 penetrates through the wire protecting sleeve 19, an annular groove is arranged in the sensor mounting hole 14, and a sealing ring 4 is embedded in the annular groove.
Claims (5)
1. The utility model provides a pressure transmitter with anti-electromagnetic interference function, includes the casing, and the casing front end is provided with filler (1), is provided with pressure sensor (3) and circuit board (8) in the casing, and pressure sensor (3) pass through the wire with circuit board (8) and are connected, its characterized in that, be provided with in the casing and disturb protection network (6), disturb protection network (6) and be tube-shape metal mesh, circuit board (8) are fixed to be set up in disturbing protection network (6), and the welding has amplifier (7), adc (9) and transformer module (13) on circuit board (8), and amplifier (7) input pole passes through the wire with pressure sensor (3) output stage and is connected, and the output stage of amplifier (7) passes through the wire with the input pole of adc (9) and is connected, and the voltage output pole and pressure sensor (3) of transformer module (13) are connected, The power supply electrodes of the amplifier (7) and the analog-to-digital converter (9) are connected through a lead, a lead (11) is arranged on the shell, and the lead (11) is electrically connected with the analog-to-digital converter (9) and the transformer module (13).
2. The pressure transmitter with the anti-electromagnetic interference function according to claim 1, wherein the housing sequentially comprises a mounting block (2), a connecting block (5) and a blocking block (10) from left to right, the pressure sensor (3) is arranged in the mounting block (2), the interference protection net (6) and the circuit board (8) are both arranged in the connecting block (5), the left end of the connecting block (5) is in threaded connection with the mounting block (2), the right end of the connecting block (5) is in threaded connection with the blocking block (10), and the mounting block (2), the connecting block (5) and the blocking block (10) are all cylindrical structures.
3. The pressure transmitter with the anti-electromagnetic interference function according to claim 2, wherein the filler neck (1) is fixedly arranged at the left end of the mounting block (2), a pressure hole is arranged on the left end face of the filler neck (1), a connecting block mounting hole (15) is arranged on the right end face of the mounting block (2), the connecting block mounting hole (15) is a threaded hole, a sensor mounting hole (14) communicated with the pressure hole is arranged at the bottom of the connecting block mounting hole (15), the pressure sensor (3) is fixedly arranged in the sensor mounting hole (14), a left-end external thread matched with the connecting block mounting hole (15) is arranged on the outer circle of the left end of the connecting block (5), a lead passing hole (16) is arranged on the right end face of the connecting block (5), a circuit board accommodating hole (17) communicated with the lead passing hole (16) is arranged on the right end face of the connecting block (5, the diameter of the circuit board accommodating hole (17) is larger than that of the wire through hole (16), the interference protection net (6) is arranged in the circuit board accommodating hole (17), right-end external threads are arranged on the outer circle of the right end of the connecting block (5), and a connecting block matching threaded hole (18) matched with the right-end external threads of the connecting block (5) is formed in the end face of the right end of the plugging block (10).
4. The pressure transmitter with anti-electromagnetic interference function according to claim 3, wherein a spring (12) is further disposed in the circuit board accommodating hole (17), one end of the spring (12) is in contact with the interference protection net (6), and the other end of the spring (12) is in contact with the plugging block (10).
5. Pressure transmitter with anti-electromagnetic interference function according to claim 3, characterized in that a wire sheath (19) is arranged in the block (10), and the lead (11) passes through the wire sheath (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021174985.7U CN212871591U (en) | 2020-06-23 | 2020-06-23 | Pressure transmitter with anti-electromagnetic interference function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021174985.7U CN212871591U (en) | 2020-06-23 | 2020-06-23 | Pressure transmitter with anti-electromagnetic interference function |
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| Publication Number | Publication Date |
|---|---|
| CN212871591U true CN212871591U (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021174985.7U Active CN212871591U (en) | 2020-06-23 | 2020-06-23 | Pressure transmitter with anti-electromagnetic interference function |
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| CN (1) | CN212871591U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383771A (en) * | 2022-01-13 | 2022-04-22 | 北京卫星环境工程研究所 | Space vacuum sensor suitable for vacuum and complex electromagnetic environment |
-
2020
- 2020-06-23 CN CN202021174985.7U patent/CN212871591U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383771A (en) * | 2022-01-13 | 2022-04-22 | 北京卫星环境工程研究所 | Space vacuum sensor suitable for vacuum and complex electromagnetic environment |
| CN114383771B (en) * | 2022-01-13 | 2024-01-19 | 北京卫星环境工程研究所 | Space vacuum sensor suitable for vacuum and complex electromagnetic environment |
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