Pressure sensor and pressure detection device

Abstract

The utility model provides a pressure sensor and a pressure detection device, and relates to the technical field of pressure detection. The pressure sensor comprises a sensor body and a circuit body. A horizontally arranged deformation diaphragm is arranged in the sensor main body, and a pressure sensitive element is arranged on the deformation diaphragm. The circuit main body is vertically arranged in the sensor main body, one end, close to the deformation diaphragm, of the circuit main body is provided with a wiring terminal, and an included angle is formed between the extension direction of the wiring terminal and the plane where the circuit main body is located; and the wiring terminal is electrically connected with the pressure sensitive element. The pressure detection device provided by the utility model adopts the pressure sensor. The pressure sensor and the pressure detection device provided by the utility model can improve the technical problem that the size and the processing difficulty of the pressure sensor in the prior art are difficult to consider at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure detection, in particular to a pressure sensor and a pressure detection device. Background Art

[0002] The pressure sensor is made of four semiconductor-processed resistors, forming a Wheatstone bridge. These resistors are mounted on a deformable diaphragm. The diaphragm is strained by the pressure of the pressure medium being measured. This strain causes the resistance of the four resistors to change, and thus the output of the Wheatstone bridge to change accordingly. This output is processed by a conditioning circuit to form a specific output signal. This is the basic principle of the pressure sensor.

[0003] However, in the prior art, when the circuit board is placed horizontally, the overall volume of the pressure sensor increases; and when the circuit board is placed vertically, the structure of the pressure sensor changes, which greatly increases the difficulty of processing. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the technical problem of the pressure sensor in the prior art that is difficult to balance between the volume and the processing difficulty.

[0005] The embodiment of the present utility model can be implemented as follows:

[0006] The utility model provides a pressure sensor, comprising:

[0007] A sensor body, wherein a horizontally arranged deformable diaphragm is provided inside the sensor body, and a pressure sensitive element is provided on the deformable diaphragm;

[0008] The circuit body is vertically arranged inside the sensor body, and a terminal is provided at one end of the circuit body close to the deformable diaphragm. The extension direction of the terminal is set at an angle to the plane where the circuit body is located; the terminal is electrically connected to the pressure sensitive element.

[0009] The advantages of the pressure sensor provided by the utility model over the prior art include:

[0010] In this pressure sensor, when the circuit body is set vertically, a terminal block is set on the circuit body at an angle to the plane where the circuit body is located. By binding the terminal block and the pressure sensitive element, the binding requirements of the pressure sensitive element can be met, and the deformable diaphragm can be kept in its original state. In other words, there is no need to change the setting method of the deformable diaphragm, and the overall processing difficulty of the pressure sensor will not be increased. At the same time, due to the vertical setting of the circuit body, it is conducive to reducing the overall volume of the pressure sensor. Based on this, the pressure sensor can achieve the goal of not increasing the processing difficulty while being conducive to reducing the volume of the pressure sensor, which can improve the technical problem of the pressure sensor in the existing technology that is difficult to balance the volume and processing difficulty.

[0011] Optionally, a plurality of the wiring terminals are provided at intervals on the circuit body, and the plurality of wiring terminals are all electrically connected to the pressure sensitive element.

[0012] Optionally, the distances between the plurality of wiring terminals and the deformable diaphragm are equal.

[0013] Optionally, the wiring terminal and the pressure sensitive element are connected via a wire, and the wire is connected to a side of the wiring terminal away from the deformable diaphragm.

[0014] Optionally, the pressure sensitive element is arranged at an edge of the deformable diaphragm.

[0015] Optionally, the circuit body and the deformable diaphragm are spaced apart.

[0016] Optionally, the sensor body includes a housing, a pressure access body and an output assembly;

[0017] The pressure access body and the output assembly are both connected to the housing;

[0018] The pressure access body is provided with a pressure channel connected to the outside world; the deformable diaphragm is formed at one end of the pressure channel to separate the pressure channel from the internal space of the sensor body; the pressure sensitive element is provided on a side of the deformable diaphragm away from the pressure channel;

[0019] The circuit body is connected to the output component, and the circuit body is electrically connected to the output component, and the output component is used to output an electrical signal.

[0020] Optionally, a mounting groove is provided on the output component, and the circuit body is embedded in the mounting groove.

[0021] Optionally, the sensor body further includes a mounting bracket, the mounting bracket including a first connecting portion and a second connecting portion connected to each other, the first connecting portion being connected to the output component, the second connecting portion being connected to the pressure access body, and the circuit body being arranged between the output component and the pressure access body.

[0022] A pressure detection device comprises the above-mentioned pressure sensor.

[0023] The pressure detection device provided by the present invention adopts the above-mentioned pressure sensor. The beneficial effects of the pressure detection device relative to the prior art are the same as the beneficial effects of the above-mentioned pressure sensor relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the explosion structure of the pressure sensor provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of a partial structure of a pressure sensor provided in an embodiment of the present application;

[0027] Figure 3 This is a schematic cross-sectional structural diagram of the pressure sensor provided in an embodiment of the present application.

[0028] Icon: 10-pressure sensor; 100-sensor body; 101-deformable diaphragm; 102-pressure sensitive element; 110-housing; 120-pressure access body; 121-pressure channel; 130-output component; 131-mounting slot; 140-mounting bracket; 141-first connection part; 142-second connection part; 200-circuit body; 210-terminal; 211-wire. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0035] See also Figure 1 In an embodiment of the present application, a pressure sensor 10 is provided. The pressure sensor 10 can be used to detect the pressure of a fluid. The pressure sensor 10 can improve the technical problem of the existing pressure sensor that is difficult to balance between volume and processing difficulty.

[0036] In this embodiment, please refer to Figure 1 、 Figure 2 and Figure 3The pressure sensor 10 includes a sensor body 100 and a circuit body 200. A horizontally arranged deformable diaphragm 101 is provided inside the sensor body 100, and a pressure sensitive element 102 is provided on the deformable diaphragm 101. The deformable diaphragm 101 can be deformed under the pressure of the fluid, and the pressure sensitive element 102 can output an electrical signal based on the deformation amount of the deformable diaphragm 101 when the deformable diaphragm 101 is deformed. The circuit body 200 is vertically arranged inside the sensor body 100, and a terminal 210 is provided at one end of the circuit body 200 close to the deformable diaphragm 101. The extension direction of the terminal 210 is set at an angle to the plane where the circuit body 200 is located; optionally, in this embodiment, the terminal 210 extends in the horizontal direction, that is, the extension direction of the terminal 210 is perpendicular to the plane where the circuit body 200 is located. The terminal 210 is electrically connected to the pressure sensitive element 102. By connecting the connection terminal 210 and the pressure sensitive element 102 with a wire, the electrical signal output by the pressure sensitive element 102 can be received and processed by the circuit body 200, so as to facilitate the next step of outputting the electrical signal.

[0037] Among them, in the pressure sensor 10, when the circuit body 200 is set vertically, a terminal block 210 is extended horizontally from the circuit body 200. By binding the terminal block 210 and the pressure sensitive element 102 with wires, the binding requirements of the pressure sensitive element 102 can be met, and the deformable diaphragm 101 can be kept in its original state. That is, compared with the deformable diaphragm in the prior art, the pressure sensor 10 does not need to change the setting method of the deformable diaphragm 101, and the overall processing difficulty of the pressure sensor 10 will not be increased. At the same time, due to the vertical setting of the circuit body 200, it is beneficial to reduce the overall volume of the pressure sensor 10. Based on this, the pressure sensor 10 can achieve the reduction of the volume of the pressure sensor 10 without increasing the processing difficulty, and can improve the technical problem of the pressure sensor in the prior art that the volume and processing difficulty are difficult to balance.

[0038] It is worth noting that in this embodiment, the size of the terminal block 210 is relatively small, and the terminal block 210 can be regarded as a pin extending horizontally from the circuit body 200, and the pin has a plane parallel to the deformable diaphragm 101, and the plane can be used for binding wires to set up, thereby completing the electrical connection between the terminal block 210 and the pressure sensitive element 102.

[0039] In this embodiment, a plurality of connection terminals 210 are provided at intervals on the circuit body 200, and each of the connection terminals 210 is electrically connected to the pressure sensitive element 102. Since the pressure sensitive element 102 is composed of multiple resistors manufactured using a semiconductor process, a corresponding number of connection terminals 210 are provided on the circuit body 200. This allows the connection terminals 210 to be electrically connected to the multiple resistors in a one-to-one correspondence, thereby achieving a wire-binding connection between the pressure sensitive element 102 and the circuit body 200.

[0040] It should be understood that in other embodiments of the present application, the number of the connection terminals 210 may be greater than the number of resistors in the pressure sensitive element 102. When binding the wires, some of the connection terminals 210 may be left vacant.

[0041] Optionally, the distances between the multiple terminals 210 and the deformable diaphragm 101 are equal. This makes it easier for the multiple terminals 210 to be electrically connected to the multiple resistors in the pressure-sensitive element 102. It also ensures that the lengths of the wires binding the multiple terminals 210 for receiving electrical signals are roughly the same, preventing signal discrepancies.

[0042] Furthermore, the terminal block 210 and the pressure-sensitive element 102 are connected via a wire 211, which is connected to the side of the terminal block 210 away from the deformable diaphragm 101. In other words, the plane of the terminal block 210 that is parallel to the deformable diaphragm 101 is located on the side of the terminal block 210 away from the deformable diaphragm 101, which facilitates wire binding between the terminal block 210 and the pressure-sensitive element 102 and improves processing efficiency.

[0043] In this embodiment, the pressure sensitive element 102 is arranged at the edge of the deformable diaphragm 101. In other words, the pressure sensitive element 102 is at a certain distance from the center of the deformable diaphragm 101, that is, the pressure sensitive element 102 is eccentrically arranged on the deformable diaphragm 101. Based on this, it is possible to prevent the circuit board from affecting the pressure sensitive element 102, ensuring the stable operation of the pressure sensitive element 102; on the other hand, it is also possible to prevent the circuit board from affecting the wire binding during the wire binding process, thereby improving the convenience of wire binding and improving processing efficiency. In addition, it is precisely because of the eccentric setting of the pressure sensitive element 102 that the circuit body 200 can be arranged as close to the deformable diaphragm 101 as possible, which is conducive to reducing the overall volume of the pressure sensor 10.

[0044] In this embodiment, the circuit body 200 is spaced apart from the deformable membrane 101. This can prevent the circuit body 200 from affecting the deformation of the deformable membrane 101, thereby avoiding detection errors.

[0045] In this embodiment, the sensor body 100 includes a housing 110, a pressure access body 120, and an output assembly 130. Both the pressure access body 120 and the output assembly 130 are connected to the housing 110. The housing 110 is generally cylindrical, and the pressure access body 120 and the output assembly 130 are respectively disposed at opposite ends of the housing 110. Part of the pressure access body 120 is disposed within the housing 110, while part of the pressure access body 120 extends beyond the housing 110. Similarly, part of the output assembly 130 is disposed within the housing 110, while part of the output assembly 130 extends beyond the housing 110. A pressure channel 121 communicating with the outside world is defined in the pressure access body 120. A deformable diaphragm 101 is formed at one end of the pressure channel 121 to separate the pressure channel 121 from the interior space of the sensor body 100. A pressure sensitive element 102 is disposed on the side of the deformable diaphragm 101 away from the pressure channel 121. It is worth noting that the formation of the deformable diaphragm 101 can be viewed as the creation of a blind hole in the pressure access body 120. The interior space of the blind hole forms the pressure channel 121, while the bottom wall of the blind hole forms the deformable diaphragm 101. The thickness of the deformable diaphragm 101 can be controlled by controlling the depth of the blind hole. The circuit body 200 is connected to the output component 130, and the circuit body 200 and the output component 130 are electrically connected. The output component 130 is used to output electrical signals.

[0046] It should be noted that, precisely because of the connection terminals 210 extending horizontally from the circuit main body 200, the deformable diaphragm 101 can be kept in a horizontal setting when the circuit main body 200 is vertically set; that is, the processing difficulty of the deformable diaphragm 101 is not increased, and at the same time, the vertical setting of the circuit main body 200 does not increase the processing difficulty of the pressure sensor 10, which is conducive to reducing the volume of the pressure sensor 10.

[0047] Optionally, to facilitate the connection between the circuit body 200 and the output assembly 130, a mounting groove 131 is defined in the output assembly 130, into which the circuit body 200 is inserted. Inserting the circuit body 200 into the mounting groove 131 improves the stability of the connection between the circuit body 200 and the output assembly 130, thereby ensuring a stable electrical connection when the circuit body 200 and the output assembly 130 are electrically connected. Furthermore, this reduces the difficulty of electrically connecting the output assembly 130 to the circuit body 200, thereby improving assembly efficiency.

[0048] In addition, in this embodiment, the sensor body 100 also includes a mounting bracket 140, which includes a first connecting portion 141 and a second connecting portion 142 connected to each other. The first connecting portion 141 is connected to the output assembly 130, and the second connecting portion 142 is connected to the pressure-insertion body 120. The circuit body 200 is disposed between the output assembly 130 and the pressure-insertion body 120. The mounting bracket 140 connects the pressure-insertion body 120 and the output assembly 130, thereby forming a single unit and ensuring the overall stability of the sensor body 100. The mounting bracket 140 stabilizes the relative position of the output assembly 130 and the pressure-insertion body 120, thereby ensuring the stability of the circuit body 200 disposed between the output assembly 130 and the pressure-insertion body 120.

[0049] Based on the pressure sensor 10 provided above, a pressure detection device (not shown) is also provided in this embodiment. The pressure detection device adopts the above-mentioned pressure sensor 10. Therefore, the pressure detection device can improve the technical problem of the pressure sensor in the prior art that is difficult to balance the volume and processing difficulty.

[0050] In summary, in the pressure sensor 10 and pressure detection device provided in the embodiment of the present application, when the circuit main body 200 is vertically arranged, a terminal block 210 is extended horizontally from the circuit main body 200. By binding the terminal block 210 and the pressure sensitive element 102 with wires, the binding requirements of the pressure sensitive element 102 can be met, and the deformable diaphragm 101 can be kept in its original state. That is, compared with the deformable diaphragm in the prior art, the pressure sensor 10 does not need to change the arrangement of the deformable diaphragm 101, and thus does not lead to an increase in the overall processing difficulty of the pressure sensor 10. At the same time, due to the vertical arrangement of the circuit main body 200, it is beneficial to reduce the overall volume of the pressure sensor 10. Based on this, the pressure sensor 10 can achieve a reduction in the volume of the pressure sensor 10 without increasing the processing difficulty, thereby improving the technical problem in the prior art that the volume and processing difficulty of the pressure sensor are difficult to balance. Furthermore, positioning the pressure-sensitive element 102 at the edge of the deformable diaphragm 101 prevents the circuit board from interfering with the pressure-sensitive element 102, ensuring stable operation of the pressure-sensitive element 102. Furthermore, during the wire binding process, the circuit board is prevented from interfering with the wire binding, improving wire binding convenience and processing efficiency. Furthermore, the eccentric placement of the pressure-sensitive element 102 allows the circuit body 200 to be positioned as close as possible to the deformable diaphragm 101, which helps reduce the overall size of the pressure sensor 10.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A pressure sensor, characterized in that: include: A sensor body (100) is provided with a horizontally arranged deformable diaphragm (101) therein, and a pressure sensitive element (102) is provided on the deformable diaphragm (101); A circuit body (200) is vertically arranged inside the sensor body (100), and a wiring terminal (210) is provided at one end of the circuit body (200) close to the deformable diaphragm (101), wherein the extension direction of the wiring terminal (210) is arranged at an angle to the plane where the circuit body (200) is located; the wiring terminal (210) is electrically connected to the pressure sensitive element (102).

2. The pressure sensor according to claim 1, wherein A plurality of connection terminals (210) are provided at intervals on the circuit body (200), and the plurality of connection terminals (210) are all electrically connected to the pressure sensitive element (102).

3. The pressure sensor according to claim 2, wherein: The distances between the plurality of connection terminals (210) and the deformable diaphragm (101) are equal.

4. The pressure sensor according to claim 1, wherein The connection terminal (210) and the pressure sensitive element (102) are connected via a wire (211), and the wire (211) is connected to a side of the connection terminal (210) away from the deformable diaphragm (101).

5. The pressure sensor according to claim 1, wherein The pressure sensitive element (102) is arranged at an edge position of the deformable diaphragm (101).

6. The pressure sensor according to claim 1, wherein The circuit main body (200) and the deformable diaphragm (101) are spaced apart.

7. The pressure sensor according to any one of claims 1 to 6, characterized in that: The sensor body (100) includes a housing (110), a pressure access body (120) and an output assembly (130); The pressure access body (120) and the output assembly (130) are both connected to the housing (110); The pressure access body (120) is provided with a pressure channel (121) communicating with the outside world; the deformable diaphragm (101) is formed at one end of the pressure channel (121) to separate the pressure channel (121) from the internal space of the sensor body (100); the pressure sensitive element (102) is provided on a side of the deformable diaphragm (101) away from the pressure channel (121); The circuit main body (200) is connected to the output component (130), and the circuit main body (200) is electrically connected to the output component (130), and the output component (130) is used to output an electrical signal.

8. The pressure sensor according to claim 7, characterized in that The output component (130) is provided with a mounting groove (131), and the circuit body (200) is embedded in the mounting groove (131).

9. The pressure sensor according to claim 7, characterized in that The sensor body (100) further includes a mounting bracket (140), the mounting bracket (140) including a first connecting portion (141) and a second connecting portion (142) connected to each other, the first connecting portion (141) being connected to the output component (130), the second connecting portion (142) being connected to the pressure access body (120), and the circuit body (200) being arranged between the output component (130) and the pressure access body (120).

10. A pressure detection device, characterized in that: The method comprises a pressure sensor (10) as claimed in any one of claims 1 to 9.

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