A transmitter

Abstract

The application relates to a transmitter, which comprises a corrugated base, a mounting groove is formed in the corrugated base, the mounting groove extends from one side of the corrugated base to the other side of the corrugated base, a joint is arranged in the corrugated base, a flow guide channel is arranged in the joint, the flow guide channel is communicated with the mounting groove, a strain resistance sensor comprises a sensor body, the sensor body is located at one end of the mounting groove away from the joint, a medium diaphragm is located at the communication position of the flow guide channel and the mounting groove, and the medium diaphragm is used for separating the flow guide channel and the mounting groove; a to-be-measured liquid passes through the joint, extrudes the medium diaphragm, the medium diaphragm transmits the pressure to the sensor body through the medium in a sealing cavity, and then the pressure value is measured; the medium is located between the medium diaphragm and the sensor body, the medium plays a heat insulation role, the "zero drift" phenomenon is relieved, and the application is suitable for a uranium enrichment engineering production line.

Description

Technical Field

[0001] This application relates to the technical field of transmitters, and particularly to a transmitter. Background Technology

[0002] In the nuclear industry, the automation of uranium enrichment production lines requires the use of transmitters, typically capacitive thin-film transmitters. A capacitive thin-film sensor mainly consists of a base, a glass layer, a fixed electrode, a measuring diaphragm, a dielectric diaphragm, and silicone oil. The glass layer is located in the middle of the base, with the fixed electrode on both sides of the inner surface of the glass layer. The dielectric diaphragms are located on both sides of the base, and the measuring diaphragm is located between the glass layers, dividing the base into two sealed chambers. Each chamber is formed by the base, dielectric diaphragm, fixed electrode, and measuring diaphragm, serving as a filling chamber and a vacuum chamber, respectively. The filling chamber is filled with silicone oil, and the vacuum chamber is a vacuum. By applying pressure to the dielectric diaphragm in the filling chamber, this pressure is transmitted through the silicone oil to the measuring diaphragm, causing deformation of the measuring diaphragm and changing its distance from the fixed electrode. This results in a change in capacitance, which in turn detects the pressure.

[0003] When a capacitive thin-film sensor is in a high-temperature working environment for a long time, the temperature of the silicone oil will rise accordingly, and the temperature of the measuring diaphragm will also rise. The measuring diaphragm is usually made of nickel alloy. The difference in the coefficient of thermal expansion between the measuring diaphragm and the filling liquid is significant, which causes extrusion or separation stress between the fixed electrode and the silicone oil, thereby causing the capacitance baseline to drift. This results in a "zero drift" phenomenon when the capacitive thin-film transmitter is used for a long time. Utility Model Content

[0004] This application provides a transmitter to solve the problem of "zero drift" that occurs after long-term use in related technologies.

[0005] In a first aspect, a transmitter is provided, comprising:

[0006] A corrugated base with a mounting groove extending from one side to the other; a connector mounted on the corrugated base, the connector having a drainage channel communicating with the mounting groove; and a strain gauge sensor housed within the mounting groove, the strain gauge sensor comprising:

[0007] The sensor body is located at the end of the mounting slot away from the connector.

[0008] A dielectric diaphragm is located at the connection between the drainage channel and the mounting groove, and the dielectric diaphragm is used to separate the drainage channel and the mounting groove.

[0009] The sensor body, the dielectric diaphragm, and the mounting groove form a sealed cavity for filling with the dielectric.

[0010] In some embodiments, the strain gauge sensor includes a strain gauge disposed on the sensor body and located inside a sealed cavity, with the diameter of the portion of the strain gauge in contact with the medium being 25mm-30mm.

[0011] In some embodiments, the connector is provided with a groove located between the drainage channel and the mounting groove, and the size of the groove corresponds to the size of the dielectric diaphragm.

[0012] In some embodiments, the mounting slot includes a pressure measuring slot, a pressure sensing slot, and an interval channel;

[0013] The sensor body is placed in the pressure measuring tank, the dielectric diaphragm is placed in the pressure sensing tank, and the two ends of the interval channel are connected to the pressure measuring tank and the pressure sensing tank respectively. The interval channel is a vertical column of equal diameter.

[0014] In some embodiments, the connection between the interval channel and the pressure measuring tank is located at the bottom center of the pressure measuring tank, and the connection between the interval channel and the pressure sensing tank is located at the top center of the pressure sensing tank.

[0015] In some embodiments, a housing is fitted onto the corrugated base, and electronic components are disposed inside the housing. The electronic components are electrically connected to the sensor body.

[0016] In some embodiments, the housing is provided with an observation port located at the end of the housing where electronic components are located.

[0017] In some embodiments, the outer wall of the connector is provided with threads.

[0018] This application provides a transmitter in which the liquid to be measured is squeezed through a connector to a medium diaphragm. The medium diaphragm transmits the pressure through the medium in the sealed cavity to the sensor body, thereby measuring the pressure value. The medium is located between the medium diaphragm and the sensor body, and the medium plays a role in heat insulation, which alleviates the "zero drift" phenomenon, making this application applicable to uranium enrichment engineering production lines. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure provided for an embodiment of this application;

[0021] Figure 2 This is a structural cross-sectional view provided for an embodiment of this application.

[0022] In the figure: 1. Housing; 2. Corrugated base; 3. Pressure sensing groove; 4. Pressure measuring groove; 5. Interval channel; 6. Strain gauge sensor; 61. Sensor body; 62. Dielectric diaphragm; 63. Strain gauge; 7. Observation port; 8. Electronic components; 9. Connector; 10. Groove. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] This application provides a transmitter that can solve the problem of "zero drift" that occurs after long-term use in related technologies.

[0025] Please see Figures 1 to 2 A transmitter comprising:

[0026] A corrugated base 2 has an installation groove that extends from one side of the corrugated base 2 to the other side.

[0027] Connector 9, mounted on corrugated base 2, has a drainage channel inside, which communicates with the mounting groove; strain gauge sensor 6, disposed in the mounting groove, includes:

[0028] Sensor body 61, sensor body 61 is located at the end of the mounting groove away from connector 9;

[0029] The dielectric diaphragm 62 is located at the connection between the drainage channel and the mounting groove, and the dielectric diaphragm 62 is used to separate the drainage channel and the mounting groove.

[0030] The sensor body 61, the dielectric diaphragm 62, and the mounting groove form a sealed cavity for filling with the dielectric.

[0031] The main measuring device of a traditional strain gauge sensor is an elastomer and a strain gauge 63. The main function of the elastomer is to separate the liquid to be measured from the strain gauge 63. The liquid to be measured squeezes the elastomer, causing deformation, which in turn causes the strain gauge 63 on the surface of the elastomer to deform synchronously, thereby measuring the pressure value.

[0032] The elastic body in traditional strain gauge sensors is typically made of stainless steel, with a coefficient of thermal expansion of approximately 17 × 10⁻⁻⁴. 6 / ℃, strain gauge 63 is generally made of silicon, and its coefficient of thermal expansion is approximately 2.6×10⁻ 6 / ℃, in traditional capacitive thin-film sensors, the fixed electrode is generally made of nickel alloy, with a coefficient of thermal expansion of approximately 13–15 × 10⁻ 6 / °C, the filler is generally silicone oil, with a coefficient of thermal expansion of approximately 900–1000 × 10⁻ 6 / °C, the difference in the coefficient of thermal expansion between the elastomer and the strain gauge 63 is smaller than the difference in the coefficient of thermal expansion between the fixed electrode and the filling liquid. Therefore, theoretically, at higher temperatures, the traditional strain resistance sensor will have less error due to the "zero drift" phenomenon. Furthermore, the error will be further reduced after compensation by the traditional strain resistance sensor.

[0033] In this embodiment, the pressure-sensing groove 3 of the corrugated base 2 is located inside the housing 1. When the strain gauge sensor 6 is installed on the corrugated base 2, the liquid to be measured squeezes the dielectric diaphragm 62 through the connector 9. The dielectric diaphragm 62 transmits the pressure to the sensor body 61 through the medium in the sealed cavity, thereby measuring the pressure value. Compared with the traditional strain gauge sensor, this application separates the sensor body 61 from the dielectric diaphragm 62 and fills the space between the sensor body 61 and the dielectric diaphragm 62 with a medium. The pressure is transmitted to the strain gauge 63 through the medium. At the same time, the medium also plays a role in heat insulation. When the liquid to be measured with an excessively high temperature comes into contact with the dielectric diaphragm 62, the temperature of the dielectric diaphragm 62 rises and transfers the temperature to the medium. Therefore, the greater the distance between the dielectric diaphragm 62 and the sensor body 61, the better the heat insulation effect, which can further reduce the error of the "zero drift" phenomenon in this application.

[0034] It should be noted that the dielectric diaphragm 62 is made of Hastelloy C276 material. Since this application is mainly used in uranium enrichment engineering production lines, the liquid to be tested in the uranium enrichment engineering production lines is corrosive to a certain extent. Considering that the dielectric diaphragm 62 needs to have certain mechanical properties, this application uses Hastelloy C276 material. The sealed cavity is filled with inert oil. The temperature of the liquid to be tested in the uranium enrichment engineering production line is relatively high. In order to better insulate the heat, inert oil is used.

[0035] Furthermore, in this embodiment, the strain resistance sensor 6 includes a strain gauge 63, which is disposed on the sensor body 61 and located in a sealed cavity. The diameter of the part of the strain gauge 63 in contact with the medium is 25mm-30mm.

[0036] Traditional strain gauge sensors have lower sensitivity than traditional capacitive thin-film sensors. In order to measure more precise data, the contact area between the strain gauge 63 and the medium is increased to 25mm-30mm. The strain gauge 63 is a MEMS single-crystal silicon sensor. The MEMS single-crystal silicon sensor surpasses traditional strain gauges in terms of accuracy, stability, environmental adaptability and cost-effectiveness through high-sensitivity silicon piezoresistive technology, structural innovation and intelligent integration.

[0037] It is important to know that the pressure on the dielectric diaphragm 62 will be transmitted to the strain gauge 63 through the medium, compressing the strain gauge 63 and causing it to deform.

[0038] Furthermore, in this embodiment, the connector 9 is provided with a groove 10, which is located between the drainage channel and the mounting groove, and the size of the groove 10 corresponds to the size of the dielectric membrane 62.

[0039] When the liquid to be tested flows out from the drain channel of connector 9, the liquid to be tested will enter the groove 10. The groove 10 can provide sufficient space for the liquid to be tested to contact the dielectric diaphragm 62, ensuring that the pressure of the liquid to be tested can be fully transmitted to the dielectric diaphragm 62.

[0040] Specifically, in this embodiment, the mounting groove includes a pressure measuring groove 4, a pressure sensing groove 3, and an interval channel 5. The sensor body 61 is disposed in the pressure measuring groove 4, and the dielectric diaphragm 62 is disposed in the pressure sensing groove 3. The two ends of the interval channel 5 are respectively connected to the pressure measuring groove 4 and the pressure sensing groove 3. The interval channel 5 is a vertical column of equal diameter. The connection between the interval channel 5 and the pressure measuring groove 4 is located at the bottom center of the pressure measuring groove 4, and the connection between the interval channel 5 and the pressure sensing groove 3 is located at the top center of the pressure sensing groove 3. When the medium passes through the interval channel 5, the pressure will not be uneven due to the structure of the interval channel 5.

[0041] A housing 1 is fitted onto the corrugated base 2. An electronic component 8 is installed inside the housing 1. The electronic component 8 is electrically connected to the sensor body 61. The sensor body 61 transmits data to the electronic component 8, and the electronic component 8 converts the electrical signal into a digital signal that can be directly read.

[0042] The housing 1 is provided with an observation port 7, which is located at the end of the housing 1 where the electronic component 8 is located. The observation port 7, the electronic component 8, and the strain resistance sensor 6 are arranged sequentially from top to bottom on the housing 1. The data displayed on the electronic component 8 can be directly seen through the observation port 7. Considering the space occupied by the lead wire of the strain resistance sensor 6, a gap is provided between the electronic component 8 and the strain resistance sensor 6.

[0043] The outer wall of the connector 9 is provided with threads. The threads on the outside of the connector 9 make it easier to install the present application on the pipe through which the liquid to be tested flows. When the connector 9 is installed on the pipe through which the liquid to be tested flows, the liquid to be tested will enter the connector 9 from the pipe, thereby allowing the liquid to be tested to be detected.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A transmitter, characterized in that: A corrugated base, wherein a mounting groove is provided on the corrugated base, and the mounting groove extends from one side of the corrugated base to the other side of the corrugated base; A connector is mounted on the corrugated base, and the connector has a drainage channel that communicates with the mounting groove. A strain gauge sensor, wherein the strain gauge sensor is disposed within the mounting groove, the strain gauge sensor comprising: The sensor body is located at the end of the mounting groove away from the connector; A dielectric membrane is located at the connection between the drainage channel and the mounting groove, and the dielectric membrane is used to separate the drainage channel and the mounting groove. The sensor body, the dielectric diaphragm, and the mounting groove form a sealed cavity for filling with the dielectric.

2. The transmitter according to claim 1, characterized in that: The strain gauge sensor includes a strain gauge disposed on the sensor body and located inside a sealed cavity. The diameter of the portion of the strain gauge in contact with the medium is 25mm-30mm.

3. The transmitter according to claim 1, characterized in that: The connector is provided with a groove, which is located between the drainage channel and the mounting groove, and the size of the groove corresponds to the size of the medium membrane.

4. The transmitter according to claim 1, characterized in that: The mounting slot includes a pressure measuring slot, a pressure sensing slot, and an interval channel; The sensor body is disposed in the pressure measuring groove, the dielectric diaphragm is disposed in the pressure sensing groove, the two ends of the interval channel are respectively connected to the pressure measuring groove and the pressure sensing groove, and the interval channel is a vertical column of equal diameter.

5. The transmitter according to claim 4, characterized in that: The connection between the interval channel and the pressure measuring groove is located at the center of the bottom of the pressure measuring groove, and the connection between the interval channel and the pressure sensing groove is located at the center of the top of the pressure sensing groove.

6. The transmitter according to claim 1, characterized in that: A housing is fitted onto the corrugated base, and electronic components are disposed inside the housing. The electronic components are electrically connected to the sensor body.

7. The transmitter according to claim 6, characterized in that: The housing is provided with an observation port, which is located at the end of the housing where electronic components are located.

8. The transmitter according to claim 1, characterized in that: The outer wall of the connector is threaded.

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