A piezoelectric vibration sensor with adjustable counterweight position

Abstract

This utility model relates to a piezoelectric vibration sensor with an adjustable counterweight position, belonging to the technical field of piezoelectric vibration sensors. The piezoelectric vibration sensor with an adjustable counterweight position includes: a housing, a base at the bottom of the housing, and a mounting component mounted on the base. The adjustment mechanism includes a driving block disposed inside the housing, a mass block disposed inside the driving block, and a threaded rod for adjusting the position of the driving block disposed inside the housing. By setting the adjustment mechanism, the position of the counterweight can be adjusted inside the housing, allowing the sensor to be optimized according to different vibration frequencies, improving its sensitivity and detection accuracy. By adjusting the position of the counterweight, it can be ensured to better cooperate with the piezoelectric crystal, thereby increasing the output charge of the sensor. This improvement allows the sensor to maintain relatively accurate measurement results under different vibration environments.

Description

Technical Field

[0001] This utility model relates to the field of piezoelectric vibration sensor technology, and in particular to a piezoelectric vibration sensor with adjustable counterweight position. Background Technology

[0002] Piezoelectric vibration sensors are sensors that convert mechanical vibration into electrical signals using the piezoelectric effect, and are widely used in vibration monitoring and fault diagnosis. Their working principle is that when the sensor is subjected to vibration, the piezoelectric material generates an electric charge, which is converted into an electrical signal through a circuit. Adjusting the position of the counterweight is to optimize the sensor's vibration response characteristics, ensuring that the sensor can accurately sense vibration signals within a specific frequency range. To improve the sensor's sensitivity and frequency response, making it more adaptable to different application scenarios, and enhancing measurement accuracy and stability, a piezoelectric vibration sensor with an adjustable counterweight position is required.

[0003] As shown in the reference case "A High-Sensitivity Piezoelectric Vibration Sensor" (publication number CN216206420U), by setting an arc-shaped concave piezoelectric crystal and a matching arc-shaped convex mass block, the contact area between the two is increased, thereby increasing the output charge of the sensor. An insulating gasket is fixedly installed on the upper end of the mass block, and an upper connector is fixedly installed on the upper end of the outer shell. In this utility model, the device can effectively improve the output charge of the sensor and has many advantages such as simple structure, reliable operation, and light weight.

[0004] While the aforementioned application can increase the output charge by increasing the contact area between the mass block and the piezoelectric crystal, the device cannot adjust the position of the mass block. This results in the sensor's response performance being less than ideal at different vibration frequencies, limiting the sensor's sensitivity and vibration detection accuracy, especially in applications requiring high-precision measurements. Utility Model Content

[0005] Therefore, it is necessary to provide a piezoelectric vibration sensor with an adjustable counterweight position to address the problem of the inability to adjust the counterweight position.

[0006] A piezoelectric vibration sensor with an adjustable counterweight position includes: a housing, a base at the bottom of the housing, and a mounting component mounted on the base;

[0007] An adjustment mechanism includes a drive block disposed inside a housing, a mass block disposed inside the drive block, and a threaded rod disposed inside the housing for adjusting the position of the drive block.

[0008] In one embodiment, two slide rods are slidably connected to the surface of the drive block, and the bottom ends of the two slide rods are fixedly connected to the mass block. A spring is sleeved on the surface of the slide rod, and the spring is fixedly connected to the inner top wall of the mass block and the drive block.

[0009] In one embodiment, a threaded rod is provided inside the housing, and one side of the surface of the drive block is disposed on the surface of the threaded rod.

[0010] In one embodiment, a limit rod is provided through the other side of the surface of the drive block, and a lifting rod is provided inside the limit rod. The surface of the lifting rod passes through the limit rod and is fixedly connected to the mass block.

[0011] In one embodiment, the surface of the lifting rod is provided with graduations, and the top of the lifting rod is spherical.

[0012] In one embodiment, the surface of the threaded rod is rotatably connected to the inner wall of the housing, and the top end of the threaded rod extends through the housing and is fixedly connected to a knob.

[0013] In one embodiment, a plurality of piezoelectric elements are disposed below the mass block, and a lead wire is disposed at the top of the housing, wherein the piezoelectric elements are electrically connected to the lead wire.

[0014] Beneficial effects

[0015] 1. By incorporating an adjustment mechanism, the position of the counterweight can be adjusted within the housing. This allows the sensor to be optimized for different vibration frequencies, improving its sensitivity and detection accuracy. Adjusting the counterweight's position ensures better engagement with the piezoelectric crystal, thereby increasing the sensor's output charge. This improvement enables the sensor to maintain relatively accurate measurement results under various vibration environments, making it particularly suitable for applications requiring high-precision detection.

[0016] 2. By incorporating a lifting rod within the limit bar to coordinate with the drive block for height adjustment, more precise counterweight adjustment can be achieved. The lifting rod design allows operators to visually observe changes in the counterweight's position, further improving adjustment accuracy. This optimization not only enhances operational convenience but also reduces human error, ensuring accurate adjustment of the counterweight at different vibration frequencies, thereby achieving more efficient and stable sensor performance. Furthermore, the smooth lifting and lowering of the drive block on the limit bar helps extend the equipment's lifespan and reduces mechanical wear caused by frequent adjustments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the outer casing of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the adjustment mechanism of this utility model;

[0021] Figure 4 This is an exploded view of the adjustment mechanism of this utility model.

[0022] Figure label:

[0023] 100. Housing; 110. Mounting component; 120. Base; 130. Lead wire; 200. Piezoelectric element; 210. Filler; 300. Adjustment mechanism; 310. Drive block; 320. Mass block; 321. Slide rod; 322. Spring; 330. Threaded rod; 331. Knob; 340. Limiting rod; 341. Lifting rod; 342. Scale. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0029] The following is combined Figures 1-4 This invention describes a piezoelectric vibration sensor with an adjustable counterweight position.

[0030] In one embodiment, a piezoelectric vibration sensor with adjustable counterweight position includes: a housing 100, a base 120 disposed at the bottom of the housing 100, and a mounting member 110 mounted on the base 120.

[0031] The adjustment mechanism 300 includes a drive block 310 disposed inside the housing 100, a mass block 320 disposed inside the drive block 310, and a threaded rod 330 disposed inside the housing 100 for adjusting the position of the drive block 310.

[0032] When the device is subjected to external vibration, the outer shell 100 and the piezoelectric element 200 fixedly connected to the outer shell 100 will move upward as a whole. At the moment when the device moves upward as a whole, the mass block 320 remains stationary due to inertia. Therefore, at the moment of vibration, the mass block 320 moves downward relative to the piezoelectric element 200, causing the internal piezoelectric material to deform, generating charge, which is transmitted to the external circuit through the electrodes and finally converted into an electrical signal, which is fed back to the detection device through the lead 130.

[0033] like Figure 2 , Figure 3 and Figure 4 As shown, two sliding rods 321 are slidably connected to the surface of the drive block 310. The bottom ends of both sliding rods 321 are fixedly connected to the mass block 320. Springs 322 are sleeved on the surface of the sliding rods 321 and are fixedly connected to the mass block 320 and the inner top wall of the drive block 310. A threaded rod 330 is provided inside the outer casing 100, and one side of the surface of the drive block 310 is provided on the surface of the threaded rod 330. A limit rod 340 is provided through the other side of the surface of the drive block 310. A lifting rod 341 is provided inside the limit rod 340, and the surface of the lifting rod 341 passes through the limit rod 340 and is fixedly connected to the mass block 320. The surface of the lifting rod 341 is provided with a scale 342, and the top of the lifting rod 341 is spherical. The surface of the threaded rod 330 is rotatably connected to the inner wall of the outer casing 100, and the top of the threaded rod 330 passes through the outer casing 100 and is fixedly connected to a knob 331.

[0034] In this embodiment, a disc-shaped limiting block is provided at the top of the slider to limit the sliding rod 321 and prevent the sliding rod 321 from disengaging from the driving block 310. When the mass block 320 of this device is in a stationary state, the limiting block is located a distance above the driving block 310. At this time, the mass block 320 is stationary under the action of gravity and the tension of the spring 322. When vibration occurs, the entire device moves upward, and the driving block 310 moves upward at the same time. However, since the limiting block is located above the driving block 310, the driving block 310 will move upward along the sliding rod 321, while the mass block 320 remains stationary under the action of the spring 322 until the piezoelectric element 200 impacts the mass block 320 upward. At this time, the piezoelectric element 200 generates an electric charge and converts it into an electrical signal, which is fed back to the detection device through the lead wire 130. The upper part of the threaded rod 330 is a smooth connecting rod, which is rotatably connected to the inner top wall of the housing 100. The lower part is a threaded part, which is completely set inside the housing 100, isolating it from contact with the outside world. Therefore, the threaded rod 330 of this device will not be affected by external impurities and will not malfunction. The surface of the limiting rod 340 has a vertically set rectangular opening. The top of the limiting rod 340 is fixedly connected to the inner top wall of the housing 100. The lifting rod 341 passes through the housing 100 through the limiting rod 340. The driving block 310 and the lifting rod 341 are fixedly connected by a connecting block. The rectangular opening on the surface of the limiting rod 340 is set for the movement of the connecting block. When the driving block 310 rises, the driving block 310 will drive the lifting rod 341 to move upward through the connecting block.

[0035] It should be noted that this device restricts the position of the mass block 320 by setting the drive block 310 in the internal cavity of the housing 100. At the same time, by opening up the upper part of the interior of the housing 100, space is reserved for the movement of the mass block 320. The other components of the adjustment mechanism 300 are all set in the newly opened cavity inside the housing 100. Therefore, this device will not affect the installation and wiring of other components in the piezoelectric sensor except for the counterweight. In addition, the adjustment mechanism 300 of this device is only used for adjusting the position of the counterweight. Therefore, the adjustment mechanism 300 of this device will not have any impact on the normal operation of the piezoelectric sensor.

[0036] like Figure 1 and Figure 2 As shown, multiple piezoelectric elements 200 are arranged below the mass block 320, and a lead wire 130 is arranged at the top of the housing 100. The piezoelectric elements 200 are electrically connected to the lead wire 130.

[0037] In this embodiment, the piezoelectric element 200 is a material that can convert mechanical force into an electrical signal. When the piezoelectric material is subjected to pressure or vibration, an electric charge is generated on its surface. In this device, the material of the piezoelectric element 200 is quartz. During the sensing process in the vibration sensor, the piezoelectric element 200 converts the external vibration into an electrical signal, which is transmitted to the circuit for processing through electrodes.

[0038] Working principle: Install the device to the preset position using the mounting part 110 and connect the lead wire 130 to the detection device. Then, adjust the position of the mass block 320 according to the vibration frequency of the device.

[0039] During adjustment, by rotating knob 331, knob 331 drives threaded rod 330 to rotate. The rotation of threaded rod 330 drives drive block 310 to rise along slide rod 321. When drive block 310 rises, it will simultaneously drive lifting rod 341 and mass block 320 to rise. At this time, the operator judges the axial position of counterweight by judging the distance the mass block 320 has risen according to scale 342. When the mass block 320 moves to the appropriate position, stop rotating and select New York.

[0040] It should be noted that the lead wire 130, mounting part 110, piezoelectric element 200, filler 210, mortise and tenon and threaded rod 330 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs, and will not be elaborated here.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A piezoelectric vibration sensor with adjustable counterweight position, characterized in that, include: The outer casing (100) has a base (120) at its bottom and a mounting component (110) mounted on the base (120). The adjustment mechanism (300) includes a drive block (310) disposed inside the housing (100), a mass block (320) disposed inside the drive block (310), and a threaded rod (330) disposed inside the housing (100) for adjusting the position of the drive block (310).

2. The piezoelectric vibration sensor with adjustable counterweight position according to claim 1, characterized in that, The surface of the drive block (310) is slidably connected to two slide rods (321), the bottom ends of the two slide rods (321) are fixedly connected to the mass block (320), and the surface of the slide rods (321) is fitted with springs (322), which are fixedly connected to the inner top wall of the mass block (320) and the drive block (310).

3. The piezoelectric vibration sensor with adjustable counterweight position according to claim 1, characterized in that, The housing (100) has a threaded rod (330) inside, and one side of the surface of the drive block (310) is disposed on the surface of the threaded rod (330).

4. The piezoelectric vibration sensor with adjustable counterweight position according to claim 1, characterized in that, A limiting rod (340) is provided through the other side of the surface of the drive block (310). A lifting rod (341) is provided inside the limiting rod (340). The surface of the lifting rod (341) passes through the limiting rod (340) and is fixedly connected to the mass block (320).

5. The piezoelectric vibration sensor with adjustable counterweight position according to claim 4, characterized in that, The surface of the lifting rod (341) is provided with a scale (342), and the top of the lifting rod (341) is spherical.

6. The piezoelectric vibration sensor with adjustable counterweight position according to claim 1, characterized in that, The surface of the threaded rod (330) is rotatably connected to the inner wall of the outer casing (100), and the top end of the threaded rod (330) extends through the outer casing (100) and is fixedly connected to a knob (331).

7. The piezoelectric vibration sensor with adjustable counterweight position according to claim 1, characterized in that, Multiple piezoelectric elements (200) are disposed below the mass block (320), and a lead wire (130) is disposed at the top of the outer shell (100). The piezoelectric elements (200) are electrically connected to the lead wire (130).

8. The piezoelectric vibration sensor with adjustable counterweight position according to claim 1, characterized in that, A filler (210) is provided between the outer shell (100), the piezoelectric element (200), and the drive block (310), and the filler (210) is an insulating material.

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