Piezoelectric quartz crystal humidity sensor based on asymmetric n-m electrode structure

Abstract

The utility model provides a piezoelectric quartz crystal humidity sensor based on an asymmetric n-m electrode structure, which relates to the technical field of sensors, and comprises a base, a piezoelectric crystal is fixed on the base, electrode layers are fixed at the top and the bottom of the piezoelectric crystal, a sensor body is mounted on the electrode layer at the upper end of the piezoelectric crystal, and the piezoelectric crystal is fixed on the sensor body. A piezoelectric crystal is arranged on the base, a protective layer is arranged on the outer surface of the sensor body, a cleaning assembly is arranged on the side, located on the piezoelectric crystal, of the base and comprises a transverse plate, a cover plate is arranged on the transverse plate, moisture absorption paper is clamped between the cover plate and the transverse plate, and pressing and covering assemblies are arranged on the two sides of the base. The upper end of the protection layer is cleaned through the cleaning assembly, the pressing and covering assembly is matched with the cleaning assembly to unfold moisture absorption paper to cover the top of the protection layer, dustproof and moistureproof protection is conducted on the upper end of the whole device, next use is facilitated, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure. Background Art

[0002] The quartz crystal microbalance is a highly sensitive micromass sensing platform capable of nanogram-level accuracy. Specific sensitive materials modified on its surface, such as two-dimensional materials, metal oxides, polymers, metal-organic frameworks, and fiber composites, can be used for highly sensitive humidity monitoring. However, many sensing materials (such as polymers and salts) swell when wet, while some (such as hydroxides and polymers) are susceptible to thermal decomposition, leading to failure of the sensitive layer and poor sensor stability.

[0003] Patent CN119334821A proposes a quartz crystal microbalance humidity sensor, its preparation method, and monitoring system. Copper is deposited on the surface of the crystal oscillator electrode on one side of the quartz crystal microbalance. After etching to form copper hydroxide, the heat treatment conditions are adjusted to in-situ prepare a copper oxide material as a humidity-sensitive layer. The heat treatment temperature significantly affects the ratio of the amount of adsorbed oxygen to the amount of lattice oxygen in the copper oxide, i.e., the amount of oxygen vacancies. The heat treatment time significantly affects the adsorption of water molecules by the copper oxide. Copper oxide sensors prepared based on appropriate heating temperatures and times have higher response and sensitivity for humidity detection, significantly outperforming copper hydroxide-based sensors that have not undergone heat treatment.

[0004] In the above technical solution, the humidity sensitive layer is protected by a bionic self-cleaning layer, but some debris or moisture will remain on its surface after each use or when not in use. If it is not cleaned in time, it will easily affect the storage and next use of the device. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. The upper end of the protective layer is cleaned by a cleaning component. The pressing component cooperates with the cleaning component to unfold the moisture-absorbing paper and cover the top of the protective layer, thereby protecting the upper end of the entire device from dust and moisture, making it easier to use next time and extending its service life.

[0006] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure, including a base, a piezoelectric crystal is fixed on the base, and electrode layers are fixed on the top and bottom of the piezoelectric crystal. The upper electrode layer of the piezoelectric crystal is installed with a sensor body, and the outer surface of the sensor body is provided with a protective layer. The base is located on one side of the piezoelectric crystal and is provided with a cleaning component. The cleaning component includes a horizontal plate, a cover plate is provided on the horizontal plate, and moisture-absorbing paper is sandwiched between the cover plate and the horizontal plate. A pressing component is provided on both sides of the base, and the pressing component includes a pressing frame, which is provided on the outside of the protective layer. The first connecting rod is symmetrically installed on the two ends of the side of the base through a rotating axis, and a sliding frame is rotatably installed on the other end of the first connecting rod, and the sliding frame is slidably sleeved on the side of the pressing frame.

[0007] Furthermore, a winding box is fixed on the top of one side of the base, and the moisture-absorbing paper is wound on an internal winding shaft of the winding box.

[0008] Furthermore, the cleaning component also includes a slide groove, and the base is provided with slide grooves on both sides of the piezoelectric crystal, and a translation screw is installed inside the slide groove on one side of the base, and a slider is slidably connected inside the slide groove, and the slider is threadedly sleeved on the translation screw, and an electric telescopic rod is fixed on the top of the slider, and the extended end of the electric telescopic rod is fixedly connected to the horizontal plate.

[0009] Furthermore, the vertical surface of the cover plate is slidably inserted into the inside of the horizontal plate, and first springs are fixed on both sides of the cover plate, the bottom of the first spring is fixedly connected to the horizontal plate, and a brush is fixed on the bottom of the horizontal plate.

[0010] Furthermore, the pressing assembly also includes gears, and gears are fixed to the outer sides of the rotating ends of the first connecting rod and the base. The tops and bottoms of the two gears are respectively meshed and connected with tooth plates, and the two tooth plates are fixedly connected.

[0011] Furthermore, pressure plates are slidably inserted at both ends of the transverse plate, and a second connecting rod is rotatably installed at the bottom of the pressure plate near one end of the electric telescopic rod through a rotating shaft, and the bottom of the second connecting rod is rotatably connected to the gear plate through a rotating shaft.

[0012] Furthermore, second springs are fixed on both sides of the pressure plate, and the bottom of the second spring is fixed on the base.

[0013] Furthermore, a collecting groove is provided on the surface of the base away from the winding box.

[0014] Beneficial effects of the utility model:

[0015] 1. According to the utility model, when the slider moves to one side of the winding box, the cross plate slides along the side of the pressure plate, and then the electric telescopic rod extends to drive the cross plate and the pressure plate to move upward. At this time, the second connecting rod pulls the tooth plate to move backward, and the tooth plate engages with the gear to make the two first connecting rods rotate to push the pressure frame upward, exceeding the height of the cross plate and the moisture-absorbing paper. At this time, the cleaning component moves along the top of the protective layer to clean and lay the moisture-absorbing paper on the upper end of the protective layer without being interfered with by the pressure frame. After the electric telescopic rod moves to the tail end of the base and is retracted, the pressure plate drops in height with the elastic force of the second spring, the second connecting rod drives the tooth plate to move forward, and the first connecting rod rotates in the opposite direction to cover the pressure frame on the periphery of the protective layer, while squeezing the moisture-absorbing paper so that it is wrapped around the periphery of the protective layer to absorb moisture and prevent dust from falling on the protective layer.

[0016] 2. The utility model drives the slider to move through the translation screw in the slide groove, and then moves the horizontal plate along the top of the protective layer. Through the cooperation of the horizontal plate and the cover plate, one end of the moisture-absorbing paper is clamped. During the movement of the horizontal plate, the brush cleans the top of the protective layer, and the moisture-absorbing paper is pulled out of the winding box.

[0017] 3. The reel box of the present invention can be opened from the rear end to replace the new moisture-absorbing paper. The moisture-absorbing paper can be torn apart manually, and a new one can be pulled out and connected to the cleaning component after each use.

[0018] 4. Compared with the prior art, the present invention cleans the upper end of the protective layer through the cleaning component, and the pressing component cooperates with the cleaning component to unfold the moisture-absorbing paper and cover the top of the protective layer, thereby protecting the upper end of the entire device from dust and moisture, making it convenient for next use and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure in the present invention;

[0020] Figure 2 This is a schematic diagram of the piezoelectric crystal top structure of a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure in the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of a pressed component of a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to the present invention;

[0022] Figure 4 This is a schematic diagram of the connection between the cleaning component and the pressing component of a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure in the utility model;

[0023] Figure 5This is a schematic diagram of the connection between the moisture-absorbing paper and the horizontal plate of a piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure in the utility model.

[0024] In the figure: 1. Base; 11. Piezoelectric crystal; 12. Protective layer; 13. Sensor body; 14. Electrode layer; 15. Collecting trough; 2. Winding box; 3. Cleaning assembly; 31. Slide; 32. Slider; 33. Electric telescopic rod; 34. Horizontal plate; 35. Moisture-absorbing paper; 36. Cover plate; 37. First spring; 38. Brush; 4. Pressing assembly; 41. Pressing frame; 42. Pressing plate; 43. Second spring; 44. First connecting rod; 45. Gear; 46. Tooth plate; 47. Second connecting rod; 48. Sliding frame. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] See also Figures 1 to 5 The utility model provides a technical solution: a method based on asymmetric nm A piezoelectric quartz crystal humidity sensor with an electrode structure includes a base 1, on which a piezoelectric crystal 11 is fixed, and electrode layers 14 are fixed on the top and bottom of the piezoelectric crystal 11, and a sensor body 13 is installed on the upper electrode layer 14 of the piezoelectric crystal 11, and a protective layer 12 is provided on the outer surface of the sensor body 13, and the base 1 is provided with a cleaning component 3 on one side of the piezoelectric crystal 11, and the cleaning component 3 includes a horizontal plate 34, and a cover plate 36 is provided on the horizontal plate 34, and a moisture-absorbing paper 35 is sandwiched between the cover plate 36 and the horizontal plate 34, and pressing components 4 are provided on both sides of the base 1, and the pressing component 4 includes a pressing frame 41, and the pressing frame 41 is arranged on the outside of the protective layer 12, and the first connecting rod 44 is symmetrically installed on the two ends of the side of the base 1 through the rotating axis, and the other end of the first connecting rod 44 is rotatably installed with a sliding frame 48, and the sliding frame 48 is slidably sleeved on the side of the pressing frame 41, and the structure of the piezoelectric crystal 11 and the electrode layer 14 is asymmetric. Electrode structure. In this solution, the relationship between the piezoelectric crystal 11, the electrode layer 14, the sensor body 13 and the protective layer 12 is the same as that of the prior art CN119334821A. After using the device, the top of the protective layer 12 is cleaned by the cleaning component 3, and the moisture-absorbing paper 35 is pulled out, and the moisture-absorbing paper 35 is pressed on the top of the protective layer 12 with the pressing component 4 to absorb moisture and prevent dust from falling on the protective layer 12.

[0027] In this embodiment, a winding box 2 is fixed to the top of one side of the base 1, and the moisture-absorbing paper 35 is wound on the internal winding shaft of the winding box 2. A collecting groove 15 is provided on the surface of the base 1 away from the winding box 2. The winding box 2 can be opened from the rear end to replace the new moisture-absorbing paper 35. The moisture-absorbing paper 35 can be torn open manually, and a new one is pulled out and connected to the cleaning component 3 after each use.

[0028] In this embodiment, the cleaning component 3 also includes a slide groove 31. The base 1 is provided with a slide groove 31 on both sides of the piezoelectric crystal 11, and a translation screw is installed inside the slide groove 31 on one side of the base 1. A slider 32 is slidably connected inside the slide groove 31. The slider 32 is threadedly sleeved on the translation screw. An electric telescopic rod 33 is fixed to the top of the slider 32, and the extended end of the electric telescopic rod 33 is fixedly connected to the horizontal plate 34. The vertical surface of the cover plate 36 is slidably inserted into the interior of the horizontal plate 34. , and first springs 37 are fixed on both sides of the cover plate 36. The bottom of the first spring 37 is fixedly connected to the cross plate 34. A brush 38 is fixed to the bottom of the cross plate 34. The slider 32 is driven by the translation screw in the slide groove 31 to move, and then the cross plate 34 is moved along the top of the protective layer 12. Through the cooperation of the cross plate 34 and the cover plate 36, one end of the moisture-absorbing paper 35 is clamped. During the movement of the cross plate 34, the brush 38 cleans the top of the protective layer 12, and the moisture-absorbing paper 35 is pulled out of the winding box 2.

[0029] In this embodiment, the pressing assembly 4 also includes a gear 45, and the first connecting rod 44 is fixed with a gear 45 on the outside of the rotating end of the base 1, and the top and bottom of the two gears 45 are respectively meshed and connected with a tooth plate 46, and the two tooth plates 46 are fixedly connected, and the two ends of the cross plate 34 are slidably inserted with a pressure plate 42, and the bottom of the pressure plate 42 near one end of the electric telescopic rod 33 is rotatably installed with a second connecting rod 47 through a rotating shaft, and the bottom of the second connecting rod 47 is rotatably connected to the tooth plate 46 through a rotating shaft, and the two sides of the pressure plate 42 are fixed with a second spring 43, and the bottom of the second spring 43 is fixed on the base 1. When the slider 32 moves to one side of the winding box 2, the cross plate 34 slides along the side of the pressure plate 42, and then the electric telescopic rod 33 extends to drive the cross plate 34 and the pressure plate 42 moves upward, at this time the second connecting rod 47 pulls the tooth plate 46 to move backward, the tooth plate 46 meshes with the gear 45 so that the two first connecting rods 44 rotate to push the pressing frame 41 upward, exceeding the height of the cross plate 34 and the moisture-absorbing paper 35. At this time, when the cleaning component 3 moves along the top of the protective layer 12 to clean and lay the moisture-absorbing paper 35 on the upper end of the protective layer 12, it will not be interfered with by the pressing frame 41. After the electric telescopic rod 33 moves to the tail end of the base 1 and is retracted, the pressing plate 42 cooperates with the elastic force of the second spring 43 to drop in height, the second connecting rod 47 drives the tooth plate 46 to move forward, and the first connecting rod 44 rotates in the opposite direction to cover the pressing frame 41 on the periphery of the protective layer 12, and at the same time squeezes the moisture-absorbing paper 35, so that it is wrapped around the periphery of the protective layer 12 to absorb moisture and prevent dust from falling on the protective layer 12.

[0030] After using the device, the sliding block 32 is driven by the translation screw in the slide groove 31 to move, and then the cross plate 34 is moved along the top of the protective layer 12. Through the cooperation of the cross plate 34 and the cover plate 36, one end of the moisture-absorbing paper 35 is clamped. During the movement of the cross plate 34, the brush 38 cleans the top of the protective layer 12, and at the same time, the moisture-absorbing paper 35 is pulled out of the winding box 2. When the slider 32 moves to one side of the winding box 2, the cross plate 34 slides along the side of the pressure plate 42, and then the electric telescopic rod 33 extends to drive the cross plate 34 and the pressure plate 42 to move upward. At this time, the second connecting rod 47 pulls the tooth plate 46 to move backward, and the tooth plate 46 engages with the gear 45 so that the two A connecting rod 44 rotates to push the pressing frame 41 upward, exceeding the height of the horizontal plate 34 and the moisture-absorbing paper 35. At this time, when the cleaning component 3 moves along the top of the protective layer 12 to clean and lay the moisture-absorbing paper 35 on the upper end of the protective layer 12, it will not be interfered with by the pressing frame 41. After the electric telescopic rod 33 moves to the tail end of the base 1 and is retracted, the pressing plate 42 cooperates with the elastic force of the second spring 43 to drop in height, and the second connecting rod 47 drives the tooth plate 46 to move forward. The first connecting rod 44 rotates in the opposite direction to cover the pressing frame 41 on the periphery of the protective layer 12, and at the same time squeezes the moisture-absorbing paper 35, so that it is wrapped around the periphery of the protective layer 12 to absorb moisture and prevent dust from falling on the protective layer 12.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0032] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure, comprising a base (1), characterized in that: A piezoelectric crystal (11) is fixed on the base (1), and electrode layers (14) are fixed on the top and bottom of the piezoelectric crystal (11). A sensor body (13) is installed on the upper electrode layer (14) of the piezoelectric crystal (11), and a protective layer (12) is provided on the outer surface of the sensor body (13). The base (1) is provided with a cleaning component (3) on one side of the piezoelectric crystal (11), and the cleaning component (3) includes a horizontal plate (34), and a cover plate (34) is provided on the horizontal plate (34). 6), and a moisture-absorbing paper (35) is sandwiched between the cover plate (36) and the horizontal plate (34), and a pressing component (4) is provided on both sides of the base (1), and the pressing component (4) includes a pressing frame (41), and the pressing frame (41) is arranged on the outside of the protective layer (12), and the two ends of the side of the base (1) are symmetrically rotated by a rotating axis with a first connecting rod (44), and the other end of the first connecting rod (44) is rotatably installed with a sliding frame (48), and the sliding frame (48) is slidably sleeved on the side of the pressing frame (41).

2. The piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to claim 1, characterized in that: A winding box (2) is fixed to the top of one side of the base (1), and the moisture-absorbing paper (35) is wound on an internal winding shaft of the winding box (2).

3. The piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to claim 1, characterized in that: The cleaning component (3) further includes a slide groove (31), the base (1) is provided with slide grooves (31) on both sides of the piezoelectric crystal (11), and a translation screw is installed inside the slide groove (31) on one side of the base (1), a slider (32) is slidably connected inside the slide groove (31), the slider (32) is threadedly sleeved on the translation screw, an electric telescopic rod (33) is fixed to the top of the slider (32), and the extended end of the electric telescopic rod (33) is fixedly connected to the horizontal plate (34).

4. The piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to claim 3, characterized in that: The vertical surface of the cover plate (36) is slidably inserted into the interior of the transverse plate (34), and first springs (37) are fixed on both sides of the cover plate (36), the bottom of the first spring (37) is fixedly connected to the transverse plate (34), and a brush (38) is fixed on the bottom of the transverse plate (34).

5. The piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to claim 4, characterized in that: The pressing assembly (4) further comprises a gear (45), the gear (45) being fixed to the outer side of the rotating end of the first connecting rod (44) and the base (1), the top and bottom of the two gears (45) being respectively meshed and connected with tooth plates (46), and the two tooth plates (46) being fixedly connected.

6. The piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to claim 5, characterized in that: The two ends of the transverse plate (34) are slidably connected with a pressure plate (42), and the bottom of the pressure plate (42) close to one end of the electric telescopic rod (33) is rotatably mounted with a second connecting rod (47) via a rotating shaft, and the bottom of the second connecting rod (47) is rotatably connected to the gear plate (46) via a rotating shaft.

7. The piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to claim 6, characterized in that: Second springs (43) are fixed on both sides of the pressure plate (42), and the bottom of the second spring (43) is fixed on the base (1).

8. The piezoelectric quartz crystal humidity sensor based on an asymmetric nm electrode structure according to claim 2, characterized in that: A collecting groove (15) is provided on the surface of the base (1) on the side away from the winding box (2).

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