A multi-parameter integrated pressure sensor

Abstract

The utility model discloses a kind of multi-parameter integrated pressure sensors, including detection cavity and flow conduit, the detection cavity both ends are connected with flow conduit, the detection cavity upper end is equipped with pressure detector, the lower end of the pressure detector is electrically connected with inductive head, the detection cavity top is equipped with through-hole, the inductive head is equipped in detection cavity top by passing through through-hole, and the inductive head outer sleeve is equipped with snap ring, the fixed inductive head lower end inner wall is equipped with adapter ring, the adapter ring is equipped with adapter plate, the adapter plate is engaged with snap ring, the adapter plate and the inner wall between through-hole are equipped with several protection components. The utility model provides a kind of multi-parameter integrated pressure sensor can completely solve the measurement distortion problem under strong vibration scene, substantially improve the data reliability of high temperature and high pressure working condition, significantly extend calibration maintenance period, reduce labor loss, especially suitable for engineering machinery hydraulic system and other harsh environment.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor technology, specifically a multi-parameter integrated pressure sensor. Background Technology

[0002] Traditional semiconductor piezoresistive diffusion pressure sensors work by creating semiconductor deformation pressure on a thin sheet surface. External force deforms the sheet, generating a piezoresistive effect that converts impedance changes into electrical signals. However, for applications requiring high sensitivity, small sheet deformation can affect actual measurements. Chinese Patent No. CN202421154977.4 discloses an integrated pressure sensor comprising a base plate, a housing, a pressure sensor body, and a removal mechanism. The removal mechanism includes a fixing component, a sliding plate, multiple first springs, and a guide component. The sliding plate has a fixing hole. The base plate and housing provide mounting conditions for the removal mechanism. Measurements can be performed using the pressure sensor body. When the pressure sensor body needs to be removed, the fixing component is moved out of the fixing hole. The return force of the multiple first springs pushes the sliding plate away from the housing, while the guide component guides the sliding plate. Once the sliding plate is completely removed from the housing, the pressure sensor body can be removed. This device allows for rapid removal of the pressure sensor body from the housing, improving removal efficiency. It also allows for reuse, reducing packaging costs and solving the problem of low removal efficiency in existing pressure sensors.

[0003] Based on the above, the inventors have discovered the following problems: The above-mentioned device solves the problem of low extraction efficiency of existing pressure sensors, but ignores the protection of pressure sensors. In pressure sensing devices, although the pressure sensor itself is very small and fragile, strong vibration or impact may cause structural damage or temporary performance changes, thereby affecting the detection data of the pressure sensor. Utility Model Content

[0004] The purpose of this invention is to provide a multi-parameter integrated 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: a multi-parameter integrated pressure sensor, comprising a detection chamber and a flow guide pipe. The flow guide pipe is connected to both ends of the detection chamber. A pressure detector is provided at the upper end of the detection chamber, and a sensing head is electrically connected to the lower end of the pressure detector. A through hole is provided at the top of the detection chamber, and the sensing head passes through the through hole and is positioned at the top of the detection chamber. A retaining ring is fitted over the sensing head. A connecting ring is fixedly provided on the inner wall of the lower end of the through hole. A connecting plate is provided on the connecting ring, and the connecting plate is engaged with the retaining ring. Several protective components are provided between the connecting plate and the inner wall of the through hole.

[0006] Furthermore, the protective component includes a movable part and a pressing part. The pressing part is located at the end of the connecting plate away from the sensing head. The movable part is located on the inner wall of the through hole. The movable part has sliding blocks at both ends on the side facing the pressing part. The pressing part has sliding grooves at both ends on the side facing the movable part. The sliding grooves are adapted to the sliding blocks, and a corresponding pair of sliding grooves are engaged with the sliding blocks.

[0007] Furthermore, the movable part is provided with a limiting sleeve, and the extrusion part is provided with a limiting post in the direction of the movable part. The limiting sleeve is slidably connected to the limiting post, and an elastic sleeve is provided outside the limiting sleeve.

[0008] Furthermore, one end of the elastic cylinder is connected to the movable part, and the other end of the elastic cylinder is connected to the extrusion part.

[0009] Furthermore, a damping mechanism is provided between the sliding block and the sliding groove.

[0010] Furthermore, damping is also provided between the limiting post and the limiting sleeve.

[0011] Furthermore, several of the protective components are arranged in a circular array with the central axis of the connecting plate as the center.

[0012] Compared with the prior art, the beneficial effects of this utility model are: this multi-parameter integrated pressure sensor is reasonable and has the following advantages:

[0013] (1) Through a three-level collaborative protection mechanism (sliding mechanism to convert vibration direction, elastic element to absorb impact, and damping friction to dissipate energy), the radial impact energy transmitted to the sensing head is efficiently attenuated; the multiple sets of protection components of the ring array achieve omnidirectional coverage, keeping the sensing head offset at an extremely low level and strictly controlling the signal drift of the pressure detector; this design completely solves the measurement distortion problem under strong vibration scenarios, greatly improves the data reliability under high temperature and high pressure conditions, significantly extends the calibration and maintenance cycle, and is particularly suitable for harsh environments such as hydraulic systems of engineering machinery.

[0014] (2) Through the synergistic effect of the elastic buffer unit and the damping limit structure, the mechanical stress borne by the sensing head is significantly reduced; the protection system can effectively resist high-intensity instantaneous impact, which multiplies the fatigue life of the core sensing element and the overall durability of the pressure detector far exceeds the industry standard; the modular design supports the independent replacement of key protection components, avoids the scrapping of the whole machine, significantly reduces maintenance costs and equipment downtime, and especially meets the long-term monitoring needs of high-frequency vibration fields such as aerospace and energy drilling. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2This is an enlarged structural schematic diagram of the present invention;

[0017] Figure 3 This is a top view of the protective component of this utility model;

[0018] Figure 4 This is an exploded view of the protective component of this utility model;

[0019] In the diagram: 1. Pressure detector; 2. Detection chamber; 3. Flow guide pipe; 4. Sensor head; 5. Connecting ring; 6. Connecting plate; 7. Snap ring; 8. Moving part; 9. Limiting post; 10. Elastic cylinder; 11. Extrusion part; 12. Sliding block; 13. Sliding groove; 14. Limiting sleeve; 15. Through hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 The present invention provides a technical solution as follows:

[0022] Example:

[0023] A multi-parameter integrated pressure sensor includes a detection chamber 2 and a flow guide pipe 3. The flow guide pipe 3 is connected to both ends of the detection chamber 2. A pressure detector 1 is provided at the upper end of the detection chamber 2. A sensing head 4 is electrically connected to the lower end of the pressure detector 1. A through hole 15 is provided at the top end of the detection chamber 2. The sensing head 4 passes through the through hole 15 and is located at the top end of the detection chamber 2. A retaining ring 7 is provided on the outer sleeve of the sensing head 4. A connecting ring 5 is fixedly provided on the inner wall of the lower end of the through hole 15. A connecting plate 6 is provided on the connecting ring 5. The connecting plate 6 is engaged with the retaining ring 7. Several protective components are provided between the connecting plate 6 and the inner wall of the through hole 15.

[0024] The pressure detector 1 receives the electrical signal from the sensing head 4 in real time, and performs signal amplification, temperature compensation and digital processing through the built-in circuit, and finally outputs high-precision pressure data.

[0025] The protective component includes a movable part 8 and a pressing part 11. The pressing part 11 is located at the end of the connecting plate 6 away from the sensing head 4. The movable part 8 is located on the inner wall of the through hole 15. The movable part 8 has sliding blocks 12 at both ends on the side facing the pressing part 11. The pressing part 11 has sliding grooves 13 at both ends on the side facing the movable part 8. The sliding grooves 13 are adapted to the sliding blocks 12, and a corresponding pair of sliding grooves 13 are engaged with the sliding blocks 12.

[0026] The movable part 8 is provided with a limiting sleeve 14, and the extrusion part 11 is provided with a limiting post 9 in the direction of the movable part 8. The limiting sleeve 14 is slidably connected to the limiting post 9, and the limiting sleeve 14 is covered with an elastic cylinder 10.

[0027] One end of the elastic cylinder 10 is connected to the movable part 8, and the other end of the elastic cylinder 10 is connected to the extrusion part 11.

[0028] Damping is provided between the sliding block 12 and the sliding groove 13.

[0029] Damping is also provided between the limiting post 9 and the limiting sleeve 14.

[0030] Among them, several of the protective components are arranged in a circular array with the central axis of the connecting plate 6 as the center.

[0031] Working principle: When external vibration is transmitted to the detection chamber 2, the radial impact force acts on the through hole 15 area, and the protective component activates a three-level energy decomposition mechanism to protect the sensing head 4; First-level vibration decomposition: The moving part 8 is forced to move, and its sliding block 12 slides obliquely along the sliding groove 13 of the extruder 11, converting the radial vibration into lateral displacement. The damping material between the groove blocks consumes part of the energy; Second-level energy absorption: The extruder 11 pushes the elastic cylinder 10 to compress axially, and absorbs another part of the impact energy through the elastic deformation of the silicone material; Third-level residual dissipation: The limiting post 9 inserts into the limiting sleeve 14 to generate sliding friction, and the viscous fluid damping agent converts the remaining kinetic energy into heat energy; The six sets of protective components in the ring array respond synchronously. No matter where the vibration comes from, the nearest component will greatly reduce the energy transmitted to the sensing head 4 through this three-level mechanism, reduce the offset under strong vibration environment, control the signal drift of the pressure detector 1 within a small range, and greatly improve the lifespan. It is especially suitable for strong vibration scenarios such as hydraulic systems of engineering machinery.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-parameter integrated pressure sensor, comprising a detection chamber (2) and a flow guide pipe (3), characterized in that: Both ends of the detection chamber (2) are connected to a flow guide pipe (3). A pressure detector (1) is provided at the upper end of the detection chamber (2). A sensing head (4) is electrically connected at the lower end of the pressure detector (1). A through hole (15) is provided at the top of the detection chamber (2). The sensing head (4) passes through the through hole (15) and is located at the top of the detection chamber (2). A retaining ring (7) is provided on the outer sleeve of the sensing head (4). A connecting ring (5) is fixed on the inner wall of the lower end of the through hole (15). A connecting plate (6) is provided on the connecting ring (5). The connecting plate (6) is engaged with the retaining ring (7). Several protective components are provided between the connecting plate (6) and the inner wall of the through hole (15).

2. The multi-parameter integrated pressure sensor according to claim 1, characterized in that: The protective component includes a movable part (8) and a pressing part (11). The pressing part (11) is located at the end of the connecting plate (6) away from the sensing head (4). The movable part (8) is located on the inner wall of the through hole (15). The movable part (8) has sliding blocks (12) at both ends on the side facing the pressing part (11). The pressing part (11) has sliding grooves (13) at both ends on the side facing the movable part (8). The sliding grooves (13) are adapted to the sliding blocks (12), and a corresponding pair of sliding grooves (13) are engaged with the sliding blocks (12).

3. The multi-parameter integrated pressure sensor according to claim 2, characterized in that: The movable part (8) is provided with a limiting sleeve (14), and the extrusion part (11) is provided with a limiting post (9) in the direction of the movable part (8). The limiting sleeve (14) is slidably connected to the limiting post (9), and the limiting sleeve (14) is covered with an elastic cylinder (10).

4. A multi-parameter integrated pressure sensor according to claim 3, characterized in that: One end of the elastic cylinder (10) is connected to the movable part (8), and the other end of the elastic cylinder (10) is connected to the extrusion part (11).

5. A multi-parameter integrated pressure sensor according to claim 4, characterized in that: Damping is provided between the sliding block (12) and the sliding groove (13).

6. A multi-parameter integrated pressure sensor according to claim 5, characterized in that: Damping is also provided between the limiting post (9) and the limiting sleeve (14).

7. A multi-parameter integrated pressure sensor according to claim 6, characterized in that: Several of the protective components are arranged in a circular array with the central axis of the connecting plate (6) as the center.

Images