Gauge pressure sensor

Abstract

The utility model relates to the field of sensors, in particular to a gauge pressure sensor, which comprises a shell, a pipe joint, a first pressure core body, a second pressure core body, a socket and a processing circuit board, a gap between the shell and the pipe joint forms a first sealing part through a welding process, and a gap between the shell and the socket forms a second sealing part through a welding process; the first pressure core body, the second pressure core body and the processing circuit board are respectively arranged in a mounting space defined by the socket, the shell and the pipe joint, and a third sealing part is formed in a gap between the first pressure core body and the pipe joint through a welding process; a fourth sealing part is formed in a gap between the second pressure core body and the pipe joint through a welding process; the pipe joint is provided with a first channel and a second channel. Through the first sealing part, the second sealing part, the third sealing part and the fourth sealing part, the installation space of the gauge pressure sensor is isolated from the atmosphere by the four sealing parts, and water vapor or water or a medium containing water in the first channel and the second channel is completely blocked outside the installation space.

Description

Technical Field

[0001] The utility model relates to the field of sensors, in particular to a gauge pressure sensor. Background Art

[0002] In the prior art, there is provided a patent document entitled "gauge pressure sensor with waterproof ventilation structure" with application number 201320373617.9; in the prior art, a vent hole is specifically provided on the outer shell so that the interior of the outer shell is connected to the atmosphere. At the same time, since water vapor can cause failure or short circuit of components / circuit boards of the gauge pressure sensor, the surface tension of water droplets is used to prevent water vapor in the atmosphere from entering the outer shell, thereby avoiding a short circuit in the gauge pressure sensor.

[0003] The above-mentioned prior art still has defects in practical application. Specifically, water vapor in the atmosphere can enter the housing through the vent holes in the above-mentioned prior art, and the water vapor condenses in the housing to form water, which can still cause a short circuit in the gauge pressure sensor.

[0004] Therefore, how to prevent water vapor from entering the interior of the sensor becomes a technical problem to be solved. Utility Model Content

[0005] In order to solve the technical problem of how to prevent water vapor from entering into the interior of a sensor, the utility model provides a gauge pressure sensor.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] According to one aspect of the utility model, there is provided a gauge pressure sensor, comprising a housing, a pipe joint, a first pressure core, a second pressure core, a socket and a processing circuit board;

[0008] One end of the shell is used to install the pipe joint, and the other end of the shell is used to install the socket, wherein the gap between the shell and the pipe joint forms a first sealing portion through a welding process, and the gap between the shell and the socket forms a second sealing portion through a welding process;

[0009] The first pressure core, the second pressure core and the processing circuit board are respectively arranged in the installation space limited by the socket, the shell and the pipe joint, the gap between the first pressure core and the pipe joint forms a third sealing part by welding process, and the gap between the second pressure core and the pipe joint forms a fourth sealing part by welding process;

[0010] The pipe joint is provided with a first channel and a second channel, the first channel and the second channel are isolated from each other, and the first channel and the second channel respectively pass through the pipe joint, wherein the first sealing portion is used to isolate the installation space from the first channel, and the second sealing portion is used to isolate the installation space from the second channel;

[0011] The processing circuit board is electrically connected to the socket, the first pressure core and the second pressure core respectively.

[0012] Further, the pipe joint is provided with a first mounting groove and a second mounting groove;

[0013] The first pressure core is arranged in the first installation groove, and the gap between the first pressure core and the inner wall of the first installation groove forms the third sealing portion through a welding process;

[0014] The second pressure core is arranged in the second installation groove, and the gap between the second pressure core and the inner wall of the second installation groove forms the fourth sealing portion through a welding process;

[0015] The first channel is communicated with the first mounting groove, and the second channel is communicated with the second mounting groove.

[0016] Further, the first channel is configured as a first section and a second section, the first section and the second section are connected, and the extension direction of the first section and the extension direction of the second section form an obtuse angle, wherein the first section and the outer surface of the pipe joint form a first opening;

[0017] The second channel is configured as a straight channel, and the second channel and the outer surface form a second opening;

[0018] The opening direction of the first opening and the opening direction of the second opening are in a right angle, an acute angle or an obtuse angle.

[0019] Further, a plurality of mounting studs are included;

[0020] The pipe joint is provided with a plurality of threaded blind holes, any one of the threaded blind holes is used to connect one of the mounting studs;

[0021] The circuit board is configured as a one-layer circuit board, and the circuit board is connected to the plurality of threaded blind holes through the plurality of mounting studs.

[0022] Further, a plurality of mounting studs are included;

[0023] The pipe joint is provided with a plurality of threaded blind holes, any one of the threaded blind holes is used to connect one of the mounting studs;

[0024] The circuit board is configured as a two-layer circuit board, and the two-layer circuit board is defined as a first plate and a second plate respectively, the first plate is connected to the plurality of threaded blind holes through a portion of the mounting studs, and the second plate is connected to the first plate through the remaining mounting studs.

[0025] Further, the processing circuit board includes a first conditioning chip, a second conditioning chip and a processor;

[0026] The first conditioning chip and the second conditioning chip are electrically connected to the processor respectively, wherein the first pressure core is electrically connected to the first conditioning chip, and the second pressure core is electrically connected to the second conditioning chip.

[0027] Furthermore, the processing circuit board also includes a power supply module and a signal output module;

[0028] The power supply module and the signal output module are electrically connected to the processor respectively, and the power supply module and the signal output module are electrically connected to the socket respectively.

[0029] The above technical solution has the following advantages or beneficial effects:

[0030] The gauge pressure sensor provided by the utility model has the first sealing part to the fourth sealing part, so that the installation space of the gauge pressure sensor is isolated from the atmosphere by four sealing parts, and the water vapor or water or the medium containing water in the first channel and the second channel is completely blocked outside the installation space, thereby solving the technical problem of how to prevent water vapor from entering the interior of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a gauge pressure sensor provided in Example 1 of the utility model;

[0032] Figure 2 A schematic diagram of the split structure of the gauge pressure sensor provided in Example 1 of the utility model;

[0033] Figure 3 A cross-sectional view of a gauge pressure sensor provided in Example 1 of the utility model;

[0034] Figure 4 A schematic diagram of the structure of the first pressure core, the second pressure core and the pipe joint provided in Example 1 of the utility model;

[0035] Figure 5 This is an electrical connection diagram of the gauge pressure sensor provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0036] Embodiment 1:

[0037] In this embodiment, a gauge pressure sensor is provided. A plurality of sealing parts are provided to isolate the interior of the gauge pressure sensor from the atmosphere, thereby solving the technical problem of how to prevent water vapor from entering the interior of the sensor.

[0038] For details, see Figures 1 to 4 , a gauge pressure sensor, comprising a housing 1, a pipe joint 2, a first pressure core 3, a second pressure core 4, a socket 5 and a processing circuit board 6;

[0039] One end of the housing 1 is used to install the pipe joint 2, and the other end of the housing 1 is used to install the socket 5, wherein the gap between the housing 1 and the pipe joint 2 forms a first sealing portion A1 through a welding process, and the gap between the housing 1 and the socket 5 forms a second sealing portion A2 through a welding process;

[0040] The first pressure core 3, the second pressure core 4 and the processing circuit board 6 are respectively arranged in the installation space S limited by the socket 5, the housing 1 and the pipe joint 2, the gap between the first pressure core 3 and the pipe joint 2 forms a third sealing portion A3 by welding, and the gap between the second pressure core 4 and the pipe joint 2 forms a fourth sealing portion A4 by welding;

[0041] The pipe joint 2 is provided with a first channel T1 and a second channel T2, the first channel T1 and the second channel T2 are isolated from each other, and the first channel T1 and the second channel T2 respectively pass through the pipe joint 2, wherein the first sealing portion A1 is used to isolate the installation space S from the first channel T1, and the second sealing portion A2 is used to isolate the installation space S from the second channel T2;

[0042] The processing circuit board 6 is electrically connected to the socket 5 , the first pressure core 3 and the second pressure core 4 respectively.

[0043] In this embodiment, the specific shape of the shell 1 is not specifically limited; generally speaking, the shell 1 is configured as a cylinder, and the shell 1 is provided with an inner cavity; in a few sensors, the shell 1 can also be configured as a column with an end face being a regular polygon, and the regular polygon includes a square, a regular hexagon, a regular octagon, etc.

[0044] In this embodiment, the specific shape of the pipe joint 2 is not specifically limited; a gap is formed at the connection between the pipe joint 2 and the housing 1, and the gap is welded by a welding process so that the gap forms a first sealing portion A1 after welding (see Figure 3 ), the gap between the pipe joint 2 and the housing 1 is sealed by the first sealing portion A1.

[0045] In this embodiment, the specific shape of the socket 5 is not specifically limited; a gap is formed at the connection between the socket 5 and the housing 1, and the gap is welded by a welding process so that the gap forms a second sealing portion A2 after welding (see Figure 3 ), the gap between the socket 5 and the housing 1 is sealed by the second sealing portion A2.

[0046] It should be understood that after the socket 5, the housing 1 and the pipe joint 2 are welded together, the three together form the outer contour of the gauge pressure sensor of this embodiment (see Figure 1 ), and the interior of the three forms an installation space S for installing the processing circuit board 6 and the first pressure core 3 and the second pressure core 4 (see Figure 3 ).

[0047] In this embodiment, the first pressure core 3 is used to measure medium pressure, and the second pressure core 4 is used to measure atmospheric pressure; the first pressure core 3 and the second pressure core 4 are respectively pressure cores with metal shells that can be welded, and the metal shells include but are not limited to stainless steel.

[0048] It should be understood that the aforementioned socket 5 should be selected as a socket with a metal shell that can be welded, including but not limited to stainless steel; the shell 1 and the pipe joint 3 should be made of metal materials that can be welded, including but not limited to stainless steel.

[0049] Before the housing 1 and the pipe joint 2 are welded, the first pressure core 3 and the second pressure core 4 are arranged on the pipe joint 2; wherein,

[0050] A gap is formed between the first pressure core 3 and the pipe joint 2, and the gap is welded by a welding process so that the gap forms a third sealing portion A3 after welding (see Figure 3 or Figure 4 ), the gap between the first pressure core 3 and the pipe joint 2 is sealed by the third sealing portion A3;

[0051] A gap is formed between the second pressure core 4 and the pipe joint 2, and the gap is welded by a welding process so that the gap forms a fourth sealing portion A4 after welding (see Figure 3 or Figure 4 ), the gap between the second pressure core 4 and the pipe joint 2 is sealed by the fourth sealing portion A4.

[0052] It should be understood that, since the specific shape of the aforementioned pipe joint 2 is not specifically limited, the position where the first pressure core 3 is set on the pipe joint 2 and the position where the second pressure core 4 is set on the pipe joint 2 can be configured as a combination of multiple positions, but the first pressure core 3 and the second pressure core 4 must be confined to the installation space S between the socket 5, the pipe joint 2 and the shell 1; in the following content, a preferred pipe joint 2 structure is provided, and a preferred position where the first pressure core 3 is set on the pipe joint 2 and the second pressure core 4 is set on the pipe joint 2 are provided, which are not mentioned here for the time being.

[0053] Before the housing 1 and the pipe joint 2 are welded, the processing circuit board 6 is arranged in the installation space S; specifically, the processing circuit board 6 has the following two installation methods:

[0054] In the first installation method (not shown in the figure), the processing circuit board 6 is connected to the shell 1; in the first installation method, the shell 1 needs to be provided with a snap-fit ​​structure or an internal threaded hole structure for installing the processing circuit board 6. The snap-fit ​​structure can be a snap protrusion, and the snap protrusion is arranged to protrude from the inner wall of the shell 1, so that the processing circuit board 6 can be snapped on the snap protrusion. The internal threaded hole structure can be a mounting ear provided on the inner wall of the shell 1, and a threaded through hole provided on the mounting ear, so that the circuit board is connected to the threaded through hole by screws.

[0055] For the second installation method, see Figure 2 or Figure 3 , which is also the preferred installation method in this embodiment, the processing circuit board 6 is arranged on the pipe joint 2;

[0056] For details, see Figure 2 , Figure 3 or Figure 4 , the gauge pressure sensor includes a plurality of mounting studs 7;

[0057] The pipe joint 2 is provided with a plurality of threaded blind holes 8, any one of which is used to connect one of the mounting studs 7;

[0058] The circuit board is configured as a one-layer circuit board, and the circuit board is connected to a plurality of threaded blind holes 8 via a plurality of mounting studs 7 .

[0059] Alternatively, the gauge pressure sensor includes a plurality of mounting studs 7;

[0060] The pipe joint 2 is provided with a plurality of threaded blind holes 8, any one of which is used to connect one of the mounting studs 7;

[0061] The circuit board is configured as a two-layer circuit board, and the two layers of the circuit board are defined as a first plate and a second plate respectively. The first plate is connected to a plurality of threaded blind holes 8 through a portion of the mounting studs 7 , and the second plate is connected to the first plate through the remaining mounting studs 7 .

[0062] In the above-mentioned two technical solutions with multiple mounting studs 7, the mounting studs 7 not only play the role of connecting the circuit board to the pipe joint 2, but also play the role of increasing the distance between the circuit board and the pipe joint 2, or play the role of increasing the distance between two layers of circuit boards.

[0063] It should be understood that the structure of the mounting stud 7 is common knowledge known to those skilled in the art, such as a double-headed stud; the connection method between the mounting stud 7 and a layer of circuit board, and the connection method between the mounting stud 7 and two layers of circuit boards are common knowledge known to those skilled in the art, and will not be repeated here.

[0064] Before welding the shell 1 and the pipe joint 2, the processing circuit board 6 should be electrically connected to the first pressure core 3 and the second pressure core 4; the specific means of electrically connecting the processing circuit board 6 to the first pressure core 3 and the specific means of electrically connecting the processing circuit board 6 to the second pressure core 4 are common knowledge known to technical personnel in this field and will not be repeated here.

[0065] After completing the aforementioned 'welding of the first pressure core 3 and the pipe joint 2', 'welding of the second pressure core 4 and the pipe joint 2', 'installing the processing circuit board 6 on the shell 1 or on the pipe joint 2' and 'electrically connecting the processing circuit board 6 to the first pressure core 3 and the second pressure core 4 respectively', the shell 1 and the pipe joint 2 can be welded.

[0066] Before the socket 5 and the housing 1 are welded, the socket 5 and the processing circuit board 6 should be electrically connected; the specific means of electrical connection between the socket 5 and the processing circuit board 6 are common knowledge known to those skilled in the art and will not be repeated here.

[0067] After the electrical connection between the socket 5 and the processing circuit board 6 is completed, the gap between the socket 5 and the housing 1 is welded.

[0068] Through the aforementioned first sealing part A1, second sealing part A2, third sealing part A3 and fourth sealing part A4, the installation space S is formed into a state of being completely sealed by the socket 5, the shell 1, the pipe joint 2, the first pressure core 3 and the second pressure core 4, wherein the water vapor or water or other medium containing water flowing from the first channel T1 into the installation space S is blocked outside the installation space S by the third sealing part A3, and the water vapor or water or other medium containing water flowing from the second channel T2 into the installation space S is blocked outside the installation space S by the fourth sealing part A4.

[0069] In the prior art (a gauge pressure sensor with a waterproof ventilation structure, application number 201320373617.9), a vent is provided on the outer shell of the gauge pressure sensor, so that water vapor can enter the interior of the gauge pressure sensor through the vent, and the water vapor can condense into water inside the gauge pressure sensor, thereby causing a short circuit in the circuit board inside the gauge pressure sensor.

[0070] In this embodiment, through the first sealing part A1 to the fourth sealing part A4, the installation space S of the gauge pressure sensor is isolated from the atmosphere by four sealing parts, and the water vapor or water or the medium containing water in the first channel T1 and the second channel T2 is completely blocked outside the installation space S, thereby solving the technical problem of how to prevent water vapor from entering the interior of the sensor.

[0071] For further information, see Figure 2 or Figure 3 , the gauge pressure sensor of this embodiment, the pipe joint 2 is provided with a first mounting groove 201 and a second mounting groove 202;

[0072] The first pressure core 3 is disposed in the first installation groove 201, and the gap between the first pressure core 3 and the inner wall of the first installation groove 201 forms a third sealing portion A3 through a welding process;

[0073] The second pressure core 4 is disposed in the second installation groove 202, and the gap between the second pressure core 4 and the inner wall of the second installation groove 202 is formed into a fourth sealing portion A4 by welding;

[0074] The first channel T1 is communicated with the first installation groove 201 , and the second channel T2 is communicated with the second installation groove 202 .

[0075] In this embodiment, preferably, the side of the pipe joint 2 facing the housing 1 is defined as the mounting surface 200 (see Figure 2 ), the mounting surface 200 is set to be a plane, and the first mounting groove 201 and the second mounting groove 202 are respectively recessed in the mounting surface 200;

[0076] The pipe joint 2 is preferably manufactured into an axisymmetric structure, so that when the pipe joint 2 is observed by a person, the pipe joint 2 is a combination structure of multiple cylindrical structures, and the multiple cylindrical structures are configured coaxially;

[0077] Corresponding to the structure of the pipe joint 2, the mounting surface 200 is manufactured as a circular plane; and a circular mounting opening should be provided at the connection between the shell 1 and the pipe joint 2; when the pipe joint 2 is inserted into the mounting opening, a gap is formed between the pipe joint 2 and the shell 1, and then the first sealing portion A1 is formed through the aforementioned welding process.

[0078] After the pipe joint 2 is inserted into the mounting opening of the shell 1, the first mounting groove 201 and the second mounting groove 202 are restricted between the shell 1 and the pipe joint 2; correspondingly, when the first pressure core 3 is arranged in the first mounting groove 201, and the second pressure core 4 is arranged in the second mounting groove 202, and the pipe joint 2, the first pressure core 3 and the second pressure core 4 are respectively inserted into the mounting opening of the shell 1, the first pressure core 3 and the second pressure core 4 are restricted between the shell 1 and the pipe joint 2.

[0079] The first channel T1 and the second channel T2 are preferably arranged as follows;

[0080] See also Figure 3 The first channel T1 is configured as a first section T01 and a second section T02, the first section T01 and the second section T02 are connected, and the extension direction of the first section T01 and the extension direction of the second section T02 form an obtuse angle, wherein the first section T01 and the outer surface of the pipe joint 2 form a first opening;

[0081] The second channel T2 is configured as a straight channel, and the second channel T2 and the outer surface form a second opening;

[0082] The opening direction of the first opening and the opening direction of the second opening are at a right angle, an acute angle, or an obtuse angle.

[0083] Since the first mounting groove 201 and the second mounting groove 202 are both recessed in the mounting surface 200 of the pipe joint 2, the first mounting groove 201 and the second mounting groove 202 form a parallel structure, resulting in that the axis line of the first mounting groove 201 and the axis line of the second mounting groove 202 are not coaxial with the axis line of the pipe joint 2 respectively; in this case, the medium channel structure of the pipe joint in the prior art is no longer applicable to the pipe joint 2 of this embodiment.

[0084] In this embodiment, in the actual processing of the pipe joint 2, the first channel T1 is processed and formed in two processing steps; specifically, a part of the pipe joint 2 that is away from the shell 1 and protrudes from the contour of the shell 1 is defined as a joint portion, and the joint portion is processed by a drilling process to form a first section T01 of the first channel T1, and its processing direction is along the direction from the joint portion to the mounting surface 200. After the first section T01 is drilled, a first mouth is naturally formed on the surface of the joint portion; then, the second section T02 of the first channel T1 is processed by a drilling process, and its processing direction is an inclined direction from the mounting surface 200 to the joint portion. The starting point of the processing is located at the bottom surface of the first mounting groove 201, so that the second section T02 forms an inclined state relative to the first section T01 after drilling (an obtuse angle is formed between the first section T01 and the second section T02), and at the same time, the first channel T1 is communicated with the first mounting groove 201 as a whole.

[0085] Since the joint is used to connect the pipeline for conveying the medium, the second channel T2 cannot be processed from the joint to the mounting surface 200, otherwise, the pipeline will surround the second channel T2 processed in the joint, resulting in the second channel T2 being unable to connect to the atmosphere.

[0086] In this embodiment, during the actual processing of the pipe joint 2, the second channel T2 is processed along the radial direction of the pipe joint 2; specifically, the pipe joint 2 located between the joint portion and the mounting surface 200 is defined as an intermediate section, and the second channel T2 is processed by a drilling process along the direction from the circumference of the intermediate section to the center of the circle, wherein the starting point of the second channel T2 is located on the surface of the circumference of the intermediate section, and the focus of the second channel T2 is located on the side wall of the second mounting groove 202, so that after the second channel T2 is drilled, the second channel T2 is connected to the second mounting groove 202.

[0087] For further information, see Figure 5 , in all the aforementioned solutions, the processing circuit board 6 includes a first conditioning chip 601, a second conditioning chip 602 and a processor 603;

[0088] The first conditioning chip 601 and the second conditioning chip 602 are electrically connected to the processor 603 , respectively. The first pressure core 3 is electrically connected to the first conditioning chip 601 , and the second pressure core 4 is electrically connected to the second conditioning chip 602 .

[0089] The first conditioning chip 601 is used to be electrically connected to the first pressure core 3; before the housing 1 and the pipe joint 2 are welded, the first conditioning core should be electrically connected to the first pressure core 3 through the welding points on the processing circuit board 6;

[0090] The second conditioning chip 602 is used to be electrically connected to the second pressure core 4; before the housing 1 and the pipe joint 2 are welded, the second conditioning chip 602 should be electrically connected to the second pressure core 4 through the welding points on the processing circuit board 6;

[0091] It should be understood that the welding method of the processing circuit board 6 and the first pressure core 3 and the second pressure core 4 is common knowledge known to those skilled in the art and will not be described in detail here.

[0092] The first conditioning chip 601 is used to receive the electrical signal of the first pressure core 3, and convert the electrical signal into the first pressure data that can be calculated by the processor 603; since the first pressure core 3 actually collects the medium pressure, the first pressure data is actually the medium pressure data;

[0093] The second conditioning chip 602 is used to receive the electrical signal of the second pressure core 4, and convert the electrical signal into the second pressure data that can be calculated by the processor 603; since the second pressure core 4 actually collects the atmospheric pressure, the second pressure data is actually the atmospheric pressure data;

[0094] After the processor 603 obtains the atmospheric pressure data and the medium pressure data respectively, the processor 603 executes a preset program, so that the atmospheric pressure data and the medium pressure data are calculated by the preset program executed by the processor 603 to obtain the gauge pressure data.

[0095] It should be understood that the gauge pressure data, as a calculation result, should be sent to the outside through the aforementioned socket 5.

[0096] It should be understood that the preset program executed by the processor 603 can be stored in a register within the processor 603 or in a memory provided on the processing circuit board 6, which is common knowledge known to those skilled in the art.

[0097] For further information, see Figure 5 , the gauge pressure sensor of this embodiment, the processing circuit board 6 also includes a power supply module 604 and a signal output module 605;

[0098] The power supply module 604 and the signal output module 605 are electrically connected to the processor 603 , respectively, and the power supply module 604 and the signal output module 605 are electrically connected to the socket 5 , respectively.

[0099] The aforementioned socket 5 is used to connect a wire, the wire has multiple strands of wires, a portion of which is used to supply power to the power supply module 604 of the processing circuit board 6 through corresponding pins of the socket 5;

[0100] After the power supply module 604 obtains the electric energy from the outside of the gauge pressure sensor, the power supply module 604 supplies power to the aforementioned processor 603, the first conditioning chip 601, the second conditioning chip 602 and the signal output module 605 respectively, and the power supply module 604 supplies power to the aforementioned first pressure core 3 and the second pressure core 4 respectively;

[0101] When the first pressure core 3 and the second pressure core 4 obtain electrical energy, if the first pressure core 3 obtains medium pressure, the first pressure core 3 transmits the medium pressure to the first conditioning chip 601 by means of an electrical signal; if the second pressure core 4 obtains atmospheric pressure, the second pressure core 4 transmits the atmospheric pressure to the second conditioning chip 602 by means of an electrical signal;

[0102] If the processor 603 obtains the aforementioned atmospheric pressure data and medium pressure data, and obtains the gauge pressure data of the two, the processor 603 sends the gauge pressure data to the signal output module 605; the signal output module 605 sends the gauge pressure data to a remote location through another part of the pins of the socket 5 and another part of the wires of the conductor.

[0103] It should be understood that the first conditioning chip and the second conditioning chip can be chips in the prior art, for example, the NSA2860 chip produced by Suzhou Nanochip Microelectronics;

[0104] It should be understood that the processor may be a processor suitable for a gauge pressure sensor in the prior art, for example, a HWD32F103MLQFP64 chip produced by Chengdu HuaWei Electronics Technology.

[0105] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A gauge pressure sensor, characterized in that: It includes a housing, a pipe joint, a first pressure core, a second pressure core, a socket and a processing circuit board; One end of the shell is used to install the pipe joint, and the other end of the shell is used to install the socket, wherein the gap between the shell and the pipe joint forms a first sealing portion through a welding process, and the gap between the shell and the socket forms a second sealing portion through a welding process; The first pressure core, the second pressure core and the processing circuit board are respectively arranged in the installation space limited by the socket, the shell and the pipe joint, the gap between the first pressure core and the pipe joint forms a third sealing part by welding process, and the gap between the second pressure core and the pipe joint forms a fourth sealing part by welding process; The pipe joint is provided with a first channel and a second channel, the first channel and the second channel are isolated from each other, and the first channel and the second channel respectively pass through the pipe joint, wherein the first sealing portion is used to isolate the installation space from the first channel, and the second sealing portion is used to isolate the installation space from the second channel; The processing circuit board is electrically connected to the socket, the first pressure core and the second pressure core respectively.

2. The gauge pressure sensor according to claim 1, characterized in that: The pipe joint is provided with a first mounting groove and a second mounting groove; The first pressure core is arranged in the first installation groove, and the gap between the first pressure core and the inner wall of the first installation groove forms the third sealing portion through a welding process; The second pressure core is arranged in the second installation groove, and the gap between the second pressure core and the inner wall of the second installation groove forms the fourth sealing portion through a welding process; The first channel is communicated with the first mounting groove, and the second channel is communicated with the second mounting groove.

3. The gauge pressure sensor according to claim 1 or 2, characterized in that: The first channel is configured as a first section and a second section, the first section and the second section are connected, and the extension direction of the first section and the extension direction of the second section form an obtuse angle, wherein the first section and the outer surface of the pipe joint form a first opening; The second channel is configured as a straight channel, and the second channel and the outer surface form a second opening; The opening direction of the first opening and the opening direction of the second opening are at a right angle, an acute angle, or an obtuse angle.

4. The gauge pressure sensor according to claim 1, characterized in that: Also included are multiple mounting studs; The pipe joint is provided with a plurality of threaded blind holes, any one of the threaded blind holes is used to connect one of the mounting studs; The circuit board is configured as a one-layer circuit board, and the circuit board is connected to the plurality of threaded blind holes through the plurality of mounting studs.

5. The gauge pressure sensor according to claim 1, characterized in that: Also included are multiple mounting studs; The pipe joint is provided with a plurality of threaded blind holes, any one of the threaded blind holes is used to connect one of the mounting studs; The circuit board is configured as a two-layer circuit board, and the two-layer circuit board is defined as a first plate and a second plate respectively, the first plate is connected to the plurality of threaded blind holes through a portion of the mounting studs, and the second plate is connected to the first plate through the remaining mounting studs.

6. The gauge pressure sensor according to claim 1, characterized in that: The processing circuit board includes a first conditioning chip, a second conditioning chip and a processor; The first conditioning chip and the second conditioning chip are electrically connected to the processor respectively, wherein the first pressure core is electrically connected to the first conditioning chip, and the second pressure core is electrically connected to the second conditioning chip.

7. The gauge pressure sensor according to claim 6, characterized in that: The processing circuit board also includes a power supply module and a signal output module; The power supply module and the signal output module are electrically connected to the processor respectively, and the power supply module and the signal output module are electrically connected to the socket respectively.

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