Pressure sensor

Abstract

The utility model discloses a pressure sensor comprising a placing plate, a fixing frame arranged on the upper surface of the placing plate, and a sensing mechanism arranged in the fixing frame. The sensing mechanism comprises a grating ruler, a metal diaphragm arranged at the bottom of the grating ruler, two limiting frames arranged on the inner wall of the top of the fixing frame, an irradiation unit arranged on one sides of the two limiting frames, and a processing unit arranged on the inner wall of the circumference of the fixing frame. A through hole is formed in the upper surface of the placement plate, the metal diaphragm is fixedly connected in the through hole, and the measurement precision of the pressure sensor is effectively improved by adopting the sensing mechanism combining the grating ruler and the metal diaphragm; the grating ruler is in sliding connection in the limiting groove to ensure stable displacement of the grating ruler when the grating ruler is stressed, then pressure changes are accurately reflected, the metal diaphragm serves as a direct stressed part and is fixed in the through hole, the stability of the structure is enhanced, the influence of external interference on a measurement result is reduced, and therefore the overall stability and reliability of the sensor are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure sensors, and more particularly to a pressure sensor. Background Technology

[0002] In the field of industrial automation and control systems, accurate pressure measurement is crucial. Traditional pressure sensors often employ mechanical or resistance strain gauge measurement principles. While these technologies can meet basic measurement needs to some extent, they have many shortcomings.

[0003] Traditional pressure sensors have many shortcomings in terms of measurement accuracy, measurement range, environmental adaptability, and data processing and transmission, making it difficult to meet the requirements of modern industrial automation and control systems for high-precision and high-reliability pressure measurement.

[0004] Therefore, in order to address the shortcomings of the above-mentioned problems, a pressure sensor is proposed. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a pressure sensor.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a pressure sensor, comprising: a placement plate, a fixing frame disposed on the upper surface of the placement plate, and a sensing mechanism disposed within the fixing frame;

[0007] The sensing mechanism includes: a grating ruler, a metal diaphragm disposed at the bottom of the grating ruler, two limiting frames disposed on the inner wall of the top of the fixed frame, an irradiation unit disposed on one side of the two limiting frames, and a processing unit disposed on the inner wall of the circumference of the fixed frame.

[0008] The upper surface of the placement plate has a through hole, the metal diaphragm is fixedly connected in the through hole, and the bottom of the grating ruler is fixedly connected to a transmission rod, which is fixedly connected to the upper surface of the metal diaphragm.

[0009] In a preferred embodiment of this utility model, a limiting groove is provided on one side of each of the two limiting frames, and the grating ruler is located in the two limiting grooves and is slidably connected.

[0010] In a preferred embodiment of this utility model, the illumination unit includes an LED lamp, and a fixing rod is fixedly connected to both sides of the LED lamp.

[0011] In a preferred embodiment of this utility model, the fixing rod is fixedly connected to one side of the limiting frame.

[0012] In a preferred embodiment of the present invention, the processing unit includes an information processing module, wherein a photovoltaic cell is fixedly connected to one side of the information processing module, and the photovoltaic cell is electrically connected to the information processing module.

[0013] In a preferred embodiment of this utility model, a plurality of connecting rods are fixedly connected to one side of the information processing module.

[0014] In a preferred embodiment of this utility model, the other end of each of the connecting rods is fixedly connected to the outer circumferential wall of the fixed frame.

[0015] In a preferred embodiment of this invention, the processing unit, the grating ruler, and the illumination unit are on the same horizontal line.

[0016] In a preferred embodiment of this utility model, the outer circumferential wall of the fixed frame is provided with a glass observation window.

[0017] In a preferred embodiment of the present invention, the bottom of the fixing frame is fixedly connected to the upper surface of the fixing frame, and a support block is fixedly connected to the bottom of the placement plate.

[0018] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0019] (1) This utility model provides a pressure sensor that effectively improves the measurement accuracy of the pressure sensor by adopting a sensing mechanism that combines a grating ruler and a metal diaphragm. The sliding connection of the grating ruler in the limiting groove ensures its stable displacement under force, thereby accurately reflecting pressure changes. At the same time, the metal diaphragm, as the direct force-bearing component, is fixedly connected in the through hole, which enhances the structural stability and reduces the influence of external interference on the measurement results, thereby improving the overall stability and reliability of the sensor.

[0020] (2) This utility model provides a pressure sensor with a direct illumination design between the LED light and the grating ruler, simplifying the sensing mechanism and reducing error accumulation in intermediate stages. The light received by the grating ruler is converted into an electrical signal through its internal grating stripes. The electrical signal is then received and processed by the information processing module to obtain the pressure value, thereby optimizing the data processing flow and improving the efficiency and accuracy of the sensor. In addition, the electrical connection between the information processing module and the photovoltaic cell ensures rapid signal transmission and processing, further improving sensing efficiency.

[0021] (3) This utility model provides a pressure sensor with a glass observation window set on the outer wall of the fixed frame, which provides users with an intuitive observation of the working status of the sensing mechanism, making it easier to discover and deal with potential problems in a timely manner and reducing the difficulty of maintenance. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0023] Figure 1 This is a three-dimensional structural diagram of the device body according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional structural view of the device body according to a preferred embodiment of the present invention.

[0025] In the diagram: 1. Fixed frame; 2. Placement plate; 3. Support block; 4. Glass observation window; 5. Metal diaphragm; 6. Information processing module; 7. Photovoltaic cell; 8. Connecting rod; 9. Limiting frame; 10. LED light; 11. Fixed rod; 12. Grating ruler; 13. Limiting groove; 14. Transmission rod. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0027] like Figure 1 As shown, a pressure sensor includes: a placement plate 2, a fixing frame 1 disposed on the upper surface of the placement plate 2, and a sensing mechanism disposed within the fixing frame 1.

[0028] like Figure 2 As shown, the sensing mechanism includes: a grating ruler 12, a metal diaphragm 5 disposed at the bottom of the grating ruler 12, two limiting frames 9 disposed on the inner wall of the top of the fixed frame 1, an irradiation unit disposed on one side of the two limiting frames 9, and a processing unit disposed on the inner wall of the circumference of the fixed frame 1.

[0029] The upper surface of the placement plate 2 has a through hole, the metal diaphragm 5 is fixedly connected in the through hole, and the bottom of the grating ruler 12 is fixedly connected to the transmission rod 14, which is fixedly connected to the upper surface of the metal diaphragm 5.

[0030] Each of the two limiting frames 9 has a limiting groove 13 on one side opposite to the other, and the grating ruler 12 is located in the two limiting grooves 13 and is slidably connected.

[0031] It should be noted that, through the combination of the grating ruler 12 and the metal diaphragm 5, the grating ruler 12, as a high-precision displacement measuring element, can accurately capture the minute displacement changes of the metal diaphragm 5 under pressure, thereby providing high-precision pressure readings. The sliding connection design of the grating ruler 12 within the limiting groove 13 ensures the stability and continuity of the sensor during the measurement process, avoiding measurement errors caused by displacement instability. The metal diaphragm 5, as the directly force-bearing component, can accurately convert pressure changes into displacement, while the grating ruler 12 can precisely capture the displacement changes of the metal diaphragm 5, thereby providing accurate pressure readings. The robust design of components such as the fixed frame 1, the limiting frame 9, and the transmission rod 14 enhances the overall stability of the sensor, enabling the sensor to maintain structural integrity under pressure and resist damage, thus extending the sensor's service life.

[0032] like Figures 1-2 As shown, the irradiation unit includes an LED lamp 10, and a fixing rod 11 is fixedly connected to both sides of the LED lamp 10. The fixing rod 11 is fixedly connected to one side of the limiting frame 9.

[0033] It should be noted that the two fixing rods 11 ensure the stable installation of the LED light 10, avoiding displacement caused by vibration or external force during the measurement process, thereby ensuring that the light can continuously and accurately illuminate the grating ruler 12, improving the accuracy and stability of the measurement.

[0034] like Figures 1-2 As shown, the processing unit includes: an information processing module 6, a photocell 7 fixedly connected to one side of the information processing module 6, the photocell 7 being electrically connected to the information processing module 6, and several connecting rods 8 fixedly connected to one side of the information processing module 6, the other ends of the several connecting rods 8 being fixedly connected to the outer circumferential wall of the fixed frame 1. The processing unit, the grating ruler 12, and the irradiation unit are on the same horizontal line.

[0035] The outer circumference of the fixed frame 1 is provided with a glass observation window 4. The bottom of the fixed frame 1 is fixedly connected to the upper surface of the fixed frame 1, and the bottom of the placement plate 2 is fixedly connected with a support block 3.

[0036] It should be noted that the electrical connection between the information processing module 6 and the photovoltaic cell 7 enables rapid conversion of optical signals to electrical signals. This allows for efficient and accurate processing of the displacement information captured by the grating ruler 12, converting it into precise pressure data. This improves the sensor's response speed and enhances the accuracy and stability of data processing. The information processing module 6 is securely fixed to the fixed frame 1 via the connecting rod 8, ensuring the stability and reliability of the processing unit during measurement. The layout of the processing unit, grating ruler 12, and illumination unit on the same horizontal line optimizes the light transmission path, reducing light loss and interference during transmission, thereby improving measurement accuracy and stability. The glass observation window 4 provides users with a direct view of the internal working status of the sensing mechanism, facilitating timely detection and handling of potential problems.

[0037] In use, when the object being measured applies pressure to the metal diaphragm 5, the diaphragm 5 undergoes a slight displacement. This displacement is transmitted to the optical scale 12 via the transmission rod 14, and the optical scale 12 captures and records this displacement change. The light emitted by the LED lamp 10 illuminates the optical scale 12, which converts the displacement change into a light signal. The light signal is converted into an electrical signal by the photocell 7 and transmitted to the information processing module 6. The information processing module 6 processes the received electrical signal and calculates the pressure data.

[0038] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A pressure sensor, comprising: The placement plate (2), the fixing frame (1) disposed on the upper surface of the placement plate (2), and the sensing mechanism disposed within the fixing frame (1) are characterized in that; The sensing mechanism includes: a grating ruler (12), a metal diaphragm (5) disposed at the bottom of the grating ruler (12), two limiting frames (9) disposed on the top inner wall of the fixed frame (1), an irradiation unit disposed on one side of the two limiting frames (9), and a processing unit disposed on the circumferential inner wall of the fixed frame (1). The upper surface of the placement plate (2) is provided with a through hole, the metal diaphragm (5) is fixedly connected in the through hole, and the bottom of the grating ruler (12) is fixedly connected with a transmission rod (14), the transmission rod (14) is fixedly connected to the upper surface of the metal diaphragm (5).

2. A pressure sensor according to claim 1, characterized in that: Each of the two limiting frames (9) has a limiting groove (13) on one side opposite to the other, and the grating ruler (12) is located in the two limiting grooves (13) and is slidably connected.

3. A pressure sensor according to claim 1, characterized in that: The illumination unit includes an LED lamp (10), and a fixing rod (11) is fixedly connected to both sides of the LED lamp (10).

4. A pressure sensor according to claim 3, characterized in that: The fixing rod (11) is fixedly connected to one side of the limiting frame (9).

5. A pressure sensor according to claim 1, characterized in that: The processing unit includes an information processing module (6), on one side of which a photovoltaic cell (7) is fixedly connected, and the photovoltaic cell (7) is electrically connected to the information processing module (6).

6. A pressure sensor according to claim 5, characterized in that: Several connecting rods (8) are fixedly connected to one side of the information processing module (6).

7. A pressure sensor according to claim 6, characterized in that: The other end of each of the connecting rods (8) is fixedly connected to the outer circumferential wall of the fixed frame (1).

8. A pressure sensor according to claim 1, characterized in that: The processing unit, the grating ruler (12), and the irradiation unit are on the same horizontal line.

9. A pressure sensor according to claim 1, characterized in that: The outer circumferential wall of the fixed frame (1) is provided with a glass observation window (4).

10. A pressure sensor according to claim 1, characterized in that: The bottom of the fixed frame (1) is fixedly connected to the upper surface of the fixed frame (1), and the bottom of the placement plate (2) is fixedly connected to the support block (3).

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