A high frequency dynamic pressure sensor

Abstract

The utility model relates to pressure sensor technical field especially relates to a kind of high-frequency dynamic pressure sensor. Including pressure sensor and plug wire, pressure sensor inside is equipped with sensitive component and signal processing module, plug wire one end is plugged with pressure sensor, pressure sensor is connected with mounting stud, pressure sensor is threadedly connected with nut, nut and plug wire mutually cooperate, nut is equipped with operating slot, operating slot side wall is slidably connected with buckle, buckle is connected with button, nut is equipped with sliding slot, button and sliding slot slidably connect, operating slot side wall is connected with reset spring, reset spring other end is connected with buckle, pressure sensor is equipped with annular clamping groove, buckle and annular clamping groove mutually cooperate.Using the utility model can effectively resist the risk of loosening, avoid connecting part gradually separates due to vibration, fundamentally reduce the possibility of signal transmission interruption.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor technology, and in particular to a high-frequency dynamic pressure sensor. Background Technology

[0002] Currently, high-frequency dynamic pressure sensors are widely used in fields such as internal combustion engine combustion analysis, hydraulic system impact monitoring, and aerospace power testing, requiring characteristics such as high dynamic response, vibration and shock resistance, and high temperature and pressure resistance.

[0003] The signal plugs of existing sensors are mostly simple plug-in or single threaded connections to the body, which are prone to loosening or falling off under high-frequency vibration or impact environments, resulting in signal transmission interruption. Utility Model Content

[0004] The present invention aims to provide a high-frequency dynamic pressure sensor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-frequency dynamic pressure sensor includes a pressure sensor and a connector. The pressure sensor internally houses a sensitive component and a signal processing module. One end of the connector is plugged into the pressure sensor. The pressure sensor is connected to a mounting stud and a nut is threaded onto it. The nut engages with the connector. The nut has an operating groove, and a latch is slidably connected to the side wall of the operating groove. A button is connected to the latch. The nut also has a sliding groove, and the button is slidably connected to the sliding groove. A return spring is connected to the side wall of the operating groove, and the other end of the return spring is connected to the latch. The pressure sensor has an annular groove, and the latch engages with the annular groove.

[0007] Preferably, the buckle is rotatably connected to a roller, and the side wall of the operating groove is provided with a rolling groove, and the roller is rotatably connected to the rolling groove.

[0008] Preferably, the buckle has an angled opening, and the angled opening cooperates with the annular groove.

[0009] Preferably, the nut is connected to a sealing ring, the sealing ring is connected to a metal gasket, and the sealing ring cooperates with the pressure sensor.

[0010] Preferably, the thread of the mounting stud is a fine thread, and the thread surface is coated with a wear-resistant lubricating coating.

[0011] Preferably, the outer surface of the nut is provided with anti-slip texture, which is evenly distributed radially.

[0012] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0013] (1) This solution constructs a dual fixing mechanism combining threaded fastening and snap-locking by setting up operating grooves, snap-locks, buttons, slides, return springs, and annular slots. When the nut is threadedly connected to the pressure sensor, the snap-lock automatically engages with the annular slot under the elastic force of the return spring, forming a reliable mechanical lock. This dual fixing method greatly enhances the stability of the connection. During high-frequency vibration, the locking effect of the snap-lock firmly restricts the relative displacement between the nut and the pressure sensor, effectively resisting the risk of loosening and preventing the connection from gradually disengaging due to vibration, fundamentally reducing the possibility of signal transmission interruption. At the same time, disassembly only requires pressing the button, which guides the snap-lock to compress the return spring and disengage from the annular slot through the guide action of the slide, easily releasing the locking state. Then, loosening the threads completes the disassembly. While ensuring the connection is firm, the convenient disassembly function is fully retained, ensuring that the sensor can continuously and stably transmit signals in a high-frequency dynamic pressure environment.

[0014] (2) By setting rollers and grooves, the sliding friction between the buckle and the operating groove is transformed into the rolling friction between the roller and the groove, which reduces the friction during the buckle's movement, making the button operation smoother and easier, while also reducing component wear and extending the service life of the structure.

[0015] (3) By setting an angle and the angle cooperating with the annular groove, during the assembly of the nut and the pressure sensor, the edge of the annular groove can squeeze the buckle through the angle, so that the buckle automatically compresses the reset spring. The initial engagement can be completed without manually operating the button, which further simplifies the installation steps and improves the assembly efficiency.

[0016] (4) By setting a sealing ring and a metal gasket, and with the sealing ring cooperating with the pressure sensor, the sealing performance of the connection between the nut and the pressure sensor is enhanced. The metal gasket can disperse the pressure and prevent the sealing ring from deforming due to excessive local stress. This ensures that under high-frequency dynamic pressure environment, external dust, moisture and other impurities cannot enter the sensor, protecting the normal operation of the internal sensitive components and signal processing module.

[0017] (5) By setting the thread of the mounting stud to a fine thread and coating the thread surface with a wear-resistant lubricating coating, the fine thread has higher connection strength and sealing performance, making it suitable for use in high-precision installation scenarios; the wear-resistant lubricating coating reduces friction and wear between the mounting stud and the installation part, making it easier to fine-tune during installation, while improving the corrosion resistance and service life of the thread, ensuring the stability of sensor installation.

[0018] (6) By setting anti-slip texture, the friction between the hand and the nut is increased. When manually tightening the nut, it can effectively prevent slippage, making it easier for the operator to apply force more steadily, ensuring that the nut can accurately and firmly cooperate with the pressure sensor, and ensuring the reliability of operation, especially in humid or oily environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a frontal cross-sectional view of the present invention;

[0021] Figure 3 for Figure 2 Enlarged view of point A;

[0022] Figure 4 Right sectional view of the roller groove provided by this utility model;

[0023] Attached reference numerals: 1. Wire connector; 2. Nut; 3. Button; 4. Pressure sensor; 5. Mounting stud; 6. Operating groove; 7. Return spring; 8. Roller groove; 9. Annular groove; 10. Snap fastener; 11. Metal gasket; 12. Sealing ring; 13. Slide groove; 14. Roller. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0025] like Figure 1-4The high-frequency dynamic pressure sensor shown includes a pressure sensor 4 and a connector 1. The pressure sensor 4 internally houses a sensitive component and a signal processing module. The sensitive component, a piezoresistive sensing element, is responsible for sensing the pressure signal. This element directly and linearly converts the received high-frequency dynamic pressure signal into a weak millivolt-level electrical signal with an extremely high natural frequency to ensure accurate response to rapidly changing pressure without signal distortion. The sensitive component is a GZP190-003S pressure sensor. The signal processing module processes the sensed signal, including amplification and filtering circuits. It amplifies the electrical signal and filters out noise, outputting a standard signal. The signal processing module is an AD623 integrated instrumentation amplifier. During installation, the operator connects one end of the connector 1 to the pressure sensor 4 to transmit the processed signal to external devices. The other end of the pressure sensor 4 is connected to a mounting stud 5 to fix the sensor at the desired monitoring position. A nut 2 is threaded onto the top of the pressure sensor 4, which cooperates with the connector 1 to protect and secure the connection between the connector 1 and the pressure sensor 4. The nut 2 has operating grooves 6 at both ends, and clips 10 are slidably connected to the side walls of the two operating grooves 6. Each clip 10 is connected to a button 3. The nut 2 also has sliding grooves 13 at both ends, with each button 3 slidably connected to its corresponding sliding groove 13. Return springs 7 are connected to the side walls of the two operating grooves 6, with their other ends connected to their corresponding clips 10. The pressure sensor 4 has an annular groove 9 at its top, with each clip 10 engaging with the annular groove 9. When the connector 1 is plugged into the pressure sensor 4, the nut 2 is tightened. During the threaded connection between the nut 2 and the pressure sensor 4, the angled front end of the clip 10 interacts with the annular groove 9, automatically and smoothly compressing the return spring 7 and sliding it into the bottom of the annular groove 9. Once the nut 2 is fully tightened, the clips 10, under the action of the return spring 7, quickly engage with the annular groove 9, forming a mechanical lock. This process allows for one-handed operation without the need to pre-press any buttons, greatly improving assembly efficiency. This design achieves dual fixation through both threaded fastening and locking with clip 10. This not only resists the tendency to loosen under high-frequency vibration, solving the problem of existing sensor signal plugs and bodies easily loosening or falling off under high-frequency vibration or impact environments, leading to signal transmission interruption, but also retains convenient disassembly functionality. For disassembly, simply press both buttons 3 simultaneously to allow clip 10 to overcome the spring force of the return spring 7 and completely disengage from the annular groove 9. Simultaneously, grasp nut 2 and rotate it to disengage it from the threaded connection of the pressure sensor 4, releasing the mechanical lock. Nut 2 can then be easily unscrewed.

[0026] like Figure 4As shown, two latches 10 are rotatably connected to rollers 14 on both sides along their sliding direction. Roller grooves 8 are respectively opened on the side walls of the operation groove 6, and the two rollers 14 are respectively rolledly connected to the corresponding roller grooves 8. The sliding friction between the latches 10 and the operation groove 6 is transformed into rolling friction, which reduces the friction force when the latches 10 move, making the operation of the button 3 smoother and less strenuous, while reducing component wear and extending the service life of the structure.

[0027] like Figure 3 As shown, the two clips 10 are respectively provided with bevels, which cooperate with the annular grooves 9. During the assembly of the nut 2 and the pressure sensor 4, the edge of the annular groove 9 can squeeze the clips 10 through the bevels, causing the clips 10 to automatically compress the return spring 7. Initial engagement can be completed without manual operation of the button 3, simplifying the installation steps and improving assembly efficiency. A sealing ring 12 is connected to the bottom of the nut 2, and a metal gasket 11 is connected inside the sealing ring 12. The sealing ring 12 cooperates with the top of the pressure sensor 4, enhancing the sealing of the connection. The metal gasket 11 can distribute pressure and prevent the sealing ring 12 from deforming due to excessive local stress.

[0028] like Figure 1 As shown, the thread of the mounting stud 5 is a fine thread, and the thread surface is coated with a wear-resistant lubricating coating. This coating reduces friction and wear during installation, facilitates fine-tuning, and improves the thread's corrosion resistance and service life, ensuring the stability of the sensor installation. The outer surface of the nut 2 has anti-slip textures, which are evenly distributed radially. These textures effectively prevent slippage when manually tightening the nut 2, allowing the operator to apply force firmly.

[0029] The specific implementation process is as follows:

[0030] The pressure sensor 4 is fixed in the monitoring position by the mounting stud 5. One end of the connector 1 is plugged into the pressure sensor 4, and then the nut 2 is tightened. During the threaded connection between the nut 2 and the pressure sensor 4, the latch 10 automatically compresses the return spring 7 under the action of the angle. When the nut 2 is in place, the latch 10 is engaged into the annular groove 9 under the action of the return spring 7, completing the fixation. To disassemble, press the button 3, which will cause the latch 10 to compress the return spring 7 and disengage from the annular groove 9. Then loosen the nut 2 to separate the connector 1 from the pressure sensor 4, or perform other operations on the sensor.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-frequency dynamic pressure sensor, characterized in that: The device includes a pressure sensor (4) and a connector (1). The pressure sensor (4) has a sensitive component and a signal processing module inside. One end of the connector (1) is plugged into the pressure sensor (4). The pressure sensor (4) is connected to a mounting stud (5). The pressure sensor (4) is threaded with a nut (2). The nut (2) cooperates with the connector (1). The nut (2) has an operating groove (6). The side wall of the operating groove (6) is slidably connected to a buckle (10). The buckle (10) is connected to a button (3). The nut (2) has a sliding groove (13). The button (3) is slidably connected to the sliding groove (13). The side wall of the operating groove (6) is connected to a return spring (7). The other end of the return spring (7) is connected to the buckle (10). The pressure sensor (4) has an annular groove (9). The buckle (10) cooperates with the annular groove (9).

2. The high-frequency dynamic pressure sensor as described in claim 1, characterized in that: The buckle (10) is rotatably connected to a roller (14), and the side wall of the operating groove (6) is provided with a rolling groove (8), and the roller (14) is rotatably connected to the rolling groove (8).

3. The high-frequency dynamic pressure sensor as described in claim 1, characterized in that: The buckle (10) has an angled opening, and the angled opening cooperates with the annular groove (9).

4. The high-frequency dynamic pressure sensor as described in claim 1, characterized in that: The nut (2) is connected to a sealing ring (12), the sealing ring (12) is connected to a metal gasket (11), and the sealing ring (12) cooperates with the pressure sensor (4).

5. A high-frequency dynamic pressure sensor as described in claim 1, characterized in that: The thread of the mounting stud (5) is a fine thread, and the thread surface is coated with a wear-resistant lubricating coating.

6. A high-frequency dynamic pressure sensor as described in claim 1, characterized in that: The outer surface of the nut (2) is provided with anti-slip texture, which is evenly distributed radially.

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