CN213301548U - Pressure transmitter - Google Patents
Pressure transmitter Download PDFInfo
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- CN213301548U CN213301548U CN202022810999.XU CN202022810999U CN213301548U CN 213301548 U CN213301548 U CN 213301548U CN 202022810999 U CN202022810999 U CN 202022810999U CN 213301548 U CN213301548 U CN 213301548U
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Abstract
The utility model provides a pressure transmitter, wherein a first cavity and a second cavity are arranged in a shell, the first cavity and the second cavity are not communicated with each other, one end of the shell is provided with a pressure source inlet, and the other end of the shell is provided with a data interface; a pressure sensing assembly is arranged in the first cavity, and a circuit board is arranged in the second cavity; the pressure sensing assembly includes: the device comprises a T-shaped contact, an elastic supporting rod and a patch type sensor, wherein one end of the elastic supporting rod is fixedly connected with the bottom of the T-shaped contact, the other end of the elastic supporting rod is fixedly connected with the inner wall of a first cavity, and the T-shaped contact moves linearly along an inlet of a pressure source along with the change of external pressure; the patch type sensor is fixedly installed on the elastic supporting rod and is in data connection with the circuit board through a five-core shielding wire and used for sending deformation data and temperature data of the elastic supporting rod to the circuit board. The utility model discloses have dustproof, anticorrosive effect, realized the accurate measurement of pressure.
Description
Technical Field
The utility model relates to a pressure test technical field, more specifically the utility model relates to a pressure transmitter that says so.
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 sensed by the load cell sensor into standard electric signals for the secondary instruments such as indicating alarm, recorder and regulator to measure, indicate and regulate the process.
The pressure transmitter 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, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and the like.
Due to the wide application of the pressure transmitter, the application environment of the pressure transmitter is relatively complex, and particularly in a relatively severe environment, the internal load cell sensor is affected by temperature, so that measurement errors are caused. In addition, when the pressure transmitter is applied to severe environments such as underground roadways, the dustproof and corrosion-resistant effects of the pressure transmitter are often insufficient, and the service life of the pressure transmitter is greatly influenced.
SUMMERY OF THE UTILITY MODEL
To above problem, the utility model aims to provide a pressure transmitter has dustproof, anticorrosive effect, has realized the accurate measurement of pressure.
The utility model discloses a realize above-mentioned purpose, realize through following technical scheme: a pressure transmitter comprises a shell, wherein a first cavity and a second cavity are arranged in the shell, the first cavity and the second cavity are not communicated with each other, one end of the shell is provided with a pressure source inlet, the pressure source inlet is communicated with the first cavity, the other end of the shell is provided with a data interface, and the data interface is communicated with the second cavity; a pressure sensing assembly is arranged in the first cavity, and a circuit board is arranged in the second cavity; the pressure sensing assembly includes: the T-shaped contact is arranged in the pressure source inlet, the bottom of the T-shaped contact is arranged in the first cavity, one end of the elastic supporting rod is fixedly connected with the bottom of the T-shaped contact, the other end of the elastic supporting rod is fixedly connected with the inner wall of the first cavity, and the T-shaped contact moves linearly along the pressure source inlet along with the change of external pressure; the patch type sensor is fixedly installed on the elastic supporting rod and is in data connection with the circuit board through a five-core shielding wire and used for sending deformation data and temperature data of the elastic supporting rod to the circuit board.
Further, the patch type sensor comprises an elastic body, a resistance strain gauge, a thermistor, a wiring terminal and a protective shell; the elastic body is arranged in the protective shell, the resistance strain gauge and the thermistor are arranged on the elastic body, the wiring terminal is arranged on the protective shell, the resistance strain gauge and the thermistor are respectively and electrically connected with the wiring terminal, and the wiring terminal is connected with the circuit board through a five-core shielding wire; mounting holes are formed in two ends of the protective shell, and the protective shell is fixedly mounted on the elastic supporting rods through the mounting holes.
Furthermore, the circuit board is provided with a control unit, a power supply conversion unit, a signal amplification unit and an A/D conversion unit, the control unit is respectively connected with the power supply conversion unit, the A/D conversion unit and the data interface, the input end of the signal amplification unit is connected with the wiring terminal through a five-core shielding wire, and the output end of the signal amplification unit is connected with the A/D conversion unit.
Further, a dial switch is arranged on the shell and connected with the control unit.
Further, a flame-retardant sealing ring is arranged on the data interface.
Further, an anti-corrosion coating is arranged on the shell.
Further, the control unit adopts an AT89s52 singlechip.
Contrast prior art, the utility model discloses beneficial effect lies in:
1. the utility model discloses be equipped with first cavity and the second cavity that each other does not communicate in the casing, pressure source import and first cavity intercommunication will detect data transmission to the circuit board of second cavity through the pressure sensing subassembly on, be equipped with the flame retardant sealing washer on the data interface of second cavity intercommunication. The structure realizes the sealing and dust prevention of the pressure transmitter. The shell is provided with an anti-corrosion coating, which improves the anti-corrosion property of the utility model. So that the device is suitable for use environments with various conditions.
2. The utility model discloses a pressure sensing subassembly can be accurate outside pressure transform of response, when taking place pressure variation, exert pressure to T type contact through the pressure source import, make it be linear motion along the pressure source import, and then make the elastic support pole take place deformation, SMD sensor enlargies deformation through inside elastomer, and resistance strain gauge detects deformation data, detects the temperature of elastic support pole through thermistor simultaneously, regards as the detection data to send to the circuit board in the lump. Compare current pressure transmitter, the utility model discloses fully consider the influence of temperature to pressure data, through built-in pressure compensation algorithm on the control unit of circuit board, can calculate more accurate pressure value to send to outside control end.
Therefore, compared with the prior art, the utility model has the substantive characteristics and the progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the patch sensor of the present invention.
Fig. 3 is an electrical block diagram of the present invention.
In the drawings, each reference numeral denotes:
1. a housing; 2. a dial switch; 3. a first cavity; 4. a second cavity; 5. a pressure source inlet; 6. a data interface; 7. a flame-retardant seal ring; 8. a circuit board; a T-shaped contact; 10. a patch type sensor; 11. an elastic support bar; 101. an elastomer; 102. a resistance strain gauge; 103. a thermistor; 104. a wiring terminal; 105. a protective shell; 106. and (7) installing holes.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, the pressure transmitter includes a housing 1, a dial switch 2 is disposed on the housing 1, and an anti-corrosion coating is disposed on the housing. Be equipped with first cavity 3 and second cavity 4 in the casing 1, first cavity 3 and second cavity 4 each other do not communicate, and the one end of casing 1 is equipped with pressure source import 5, pressure source import 5 and first cavity 3 intercommunication, the other end of casing 1 is equipped with data interface 6, and data interface 6 and second cavity 4 intercommunication are equipped with flame retardant formula sealing washer 7 on the data interface 6. Be equipped with the forced induction subassembly in the first cavity 3, second cavity 4 is equipped with circuit board 8.
The pressure sensing assembly includes: the pressure sensor comprises a T-shaped contact 9, an elastic supporting rod 11 and a patch type sensor 10, wherein the end part of the T-shaped contact 9 is arranged in a pressure source inlet 5, the bottom of the T-shaped contact 9 is arranged in a first cavity 3, one end of the elastic supporting rod 11 is fixedly connected with the bottom of the T-shaped contact 9, the other end of the elastic supporting rod 11 is fixedly connected with the inner wall of the first cavity 3 opposite to the pressure source inlet 5, and the T-shaped contact 9 moves linearly along the pressure source inlet 5 along with the change of external pressure; the patch type sensor 10 is fixedly installed on the elastic supporting rod 11, and the patch type sensor 10 is in data connection with the circuit board 8 through a five-core shielding wire and used for sending deformation data and temperature data of the elastic supporting rod 11 to the circuit board 8.
As shown in fig. 2, the patch sensor 10 includes an elastic body 101, a resistance strain gauge 102, a thermistor 103, a connection terminal 104, and a protective shell 105; the elastic body 101 is arranged in the protective shell 105, the resistance strain gauge 102 and the thermistor 103 are arranged on the elastic body 101, the wiring terminal 104 is arranged on the protective shell 105, the resistance strain gauge 102 and the thermistor 103 are respectively and electrically connected with the wiring terminal 104, and the wiring terminal 104 is connected with the circuit board 8 through a five-core shielding wire; mounting holes 106 are formed in two ends of the protective shell 105, and the protective shell 105 is fixedly mounted on the elastic support rod 11 through the mounting holes 106.
Because the change of external pressure source, exert pressure to T type contact 9 through pressure source import 5, make it be linear motion along pressure source import 5, and then make elastic support rod 11 take place deformation, the SMD sensor detects this kind of deformation and elastic support rod 11's temperature through resistance strain gauge and thermistor, with the data transmission that detect to the circuit board.
The circuit board is provided with a control unit, a power supply conversion unit, a signal amplification unit and an A/D conversion unit. As shown in fig. 3, the control unit is connected to the power conversion unit, the a/D conversion unit, the data interface, and the dial switch, respectively, the input end of the signal amplification unit is connected to the connection terminal through the five-core shielded wire, and the output end of the signal amplification unit is connected to the a/D conversion unit. The control unit adopts an AT89s52 singlechip. The detection data are sequentially subjected to signal amplification and A/D conversion and then sent to the control unit, and the control unit calculates an accurate pressure value through a preset temperature compensation algorithm and sends the accurate pressure value to an external monitoring end through a data interface.
Therefore, the pressure acquisition, calculation and transmission are realized.
The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.
Claims (7)
1. A pressure transmitter is characterized by comprising a shell, wherein a first cavity and a second cavity are arranged in the shell, the first cavity and the second cavity are not communicated with each other, one end of the shell is provided with a pressure source inlet, the pressure source inlet is communicated with the first cavity, the other end of the shell is provided with a data interface, and the data interface is communicated with the second cavity;
a pressure sensing assembly is arranged in the first cavity, and a circuit board is arranged in the second cavity;
the pressure sensing assembly includes: the T-shaped contact is arranged in the pressure source inlet, the bottom of the T-shaped contact is arranged in the first cavity, one end of the elastic supporting rod is fixedly connected with the bottom of the T-shaped contact, the other end of the elastic supporting rod is fixedly connected with the inner wall of the first cavity, and the T-shaped contact moves linearly along the pressure source inlet along with the change of external pressure; the patch type sensor is fixedly installed on the elastic supporting rod and is in data connection with the circuit board through a five-core shielding wire and used for sending deformation data and temperature data of the elastic supporting rod to the circuit board.
2. The pressure transmitter of claim 1, wherein: the patch type sensor comprises an elastic body, a resistance strain gauge, a thermistor, a wiring terminal and a protective shell; the elastic body is arranged in the protective shell, the resistance strain gauge and the thermistor are arranged on the elastic body, the wiring terminal is arranged on the protective shell, the resistance strain gauge and the thermistor are respectively and electrically connected with the wiring terminal, and the wiring terminal is connected with the circuit board through a five-core shielding wire; mounting holes are formed in two ends of the protective shell, and the protective shell is fixedly mounted on the elastic supporting rods through the mounting holes.
3. The pressure transmitter of claim 2, wherein the circuit board is provided with a control unit, a power conversion unit, a signal amplification unit, and an a/D conversion unit, the control unit is connected to the power conversion unit, the a/D conversion unit, and the data interface, the input terminal of the signal amplification unit is connected to the connection terminal through a five-core shielded wire, and the output terminal of the signal amplification unit is connected to the a/D conversion unit.
4. The pressure transmitter of claim 3, wherein a dip switch is provided on the housing, the dip switch being connected to the control unit.
5. The pressure transmitter of claim 1, wherein: and a flame-retardant sealing ring is arranged on the data interface.
6. The pressure transmitter of claim 1, wherein: and the shell is provided with an anti-corrosion coating.
7. The pressure transmitter of claim 3, wherein: the control unit adopts an AT89s52 singlechip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022810999.XU CN213301548U (en) | 2020-11-27 | 2020-11-27 | Pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022810999.XU CN213301548U (en) | 2020-11-27 | 2020-11-27 | Pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213301548U true CN213301548U (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022810999.XU Active CN213301548U (en) | 2020-11-27 | 2020-11-27 | Pressure transmitter |
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|---|---|
| CN (1) | CN213301548U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114012419A (en) * | 2021-11-02 | 2022-02-08 | 中车大连机车车辆有限公司 | System, method and device for centering and adjusting shafting of diesel generator set |
-
2020
- 2020-11-27 CN CN202022810999.XU patent/CN213301548U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114012419A (en) * | 2021-11-02 | 2022-02-08 | 中车大连机车车辆有限公司 | System, method and device for centering and adjusting shafting of diesel generator set |
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