A high-precision humidity sensor

Abstract

The utility model relates to sensor technical field especially relates to a high accuracy humidity sensor, including fixed base, the fixed base is slidably installed with humidity sensor, the fixed base lower part is fixedly arranged with the guide seat, the guide seat is fixedly connected with the first guide rod of symmetrical distribution, the first guide rod is slidably provided with the sliding block. The symmetrical damping structure that cooperation between humidity sensor and fixed base top is constituted by guide seat, first guide rod, sliding block, connecting rod and first elastic part, when being subjected to external vibration or impact in the equipment operation process, can convert the mechanical kinetic energy of input into the elastic potential energy of first elastic part and dissipate, the vibration acceleration amplitude that significantly attenuates transmission to internal sensitive element, avoid the signal fluctuation, zero drift or sensitivity drop caused by vibration, thereby guarantee high accuracy, stable humidity detection performance.

Description

Technical Field

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

[0002] Humidity is one of the key parameters in industrial production, environmental monitoring, medical equipment, HVAC systems and precision instruments. Its measurement accuracy directly affects the control performance and operational reliability of the system. With the development of sensing technology, modern high-precision humidity sensors have widely adopted capacitive, resistive or optical sensing elements, which have excellent characteristics such as high sensitivity, low drift and fast response.

[0003] Currently, some existing humidity sensors only have basic encapsulation protection functions and limited vibration reduction capabilities, making it difficult to effectively isolate mid-to-high frequency vibration energy. In practical applications, humidity sensors are often installed in equipment or environments with mechanical vibration. In these situations, the continuous mid-to-low frequency vibrations or sudden mechanical impacts can be transmitted to the sensor body through the installation structure, causing micro-displacement of the internal microstructure, changes in electrode spacing, or changes in encapsulation stress, thereby introducing measurement errors. In severe cases, this can cause zero-point drift, decreased sensitivity, or long-term stability degradation, thus affecting measurement accuracy.

[0004] Therefore, there is an urgent need to provide a high-precision humidity sensor with the function of attenuating multi-directional vibration transmission, so as to improve its working stability and measurement accuracy in complex dynamic environments. Utility Model Content

[0005] In order to overcome the shortcomings of existing humidity sensors, such as susceptibility to mechanical shock in vibration environments, which leads to decreased measurement accuracy, zero drift, and poor long-term stability, this invention provides a high-precision humidity sensor.

[0006] To address the aforementioned issues, this utility model employs the following technical solution: a high-precision humidity sensor, comprising a fixed base, on which a humidity sensor is slidably mounted; a guide seat is fixedly disposed at the lower part of the fixed base; first guide rods symmetrically distributed are fixedly connected to the guide seat; sliders are slidably disposed on the first guide rods; a first elastic element is sleeved on the first guide rods; both ends of the first elastic element are fixedly connected to the slider and the guide seat, respectively; one end of a connecting rod is hinged to the slider; and a mounting base is fixedly disposed at the upper part of the humidity sensor, which is hinged to the other end of the connecting rod, thereby forming a symmetrical vibration damping structure.

[0007] Preferably, the detection probe of the humidity sensor is covered with a protective mesh sleeve.

[0008] Preferably, the protective net cylinder is provided with a limiting ring at the top, and a fixing block is fixedly connected to both sides of the limiting ring. The fixing block has a slot. The humidity sensor is provided with a second guide rod on both sides of the upper part. A sliding plate is slidably provided on the second guide rod. A locking block matching the slot is fixedly connected to the lower end of the sliding plate. A second elastic element is sleeved on the second guide rod. The two ends of the second elastic element are fixedly connected to the sliding plate and the second guide rod, respectively.

[0009] Preferably, the two sides of the card block are designed as inclined guide surfaces to form a wedge-shaped structure.

[0010] Preferably, suction cups are provided at the corners of the fixing base.

[0011] Preferably, an audible and visual alarm is installed on the top of the humidity sensor, and the audible and visual alarm is electrically connected to the humidity sensor to form a linkage response.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. The humidity sensor and the fixed base are connected by a symmetrical vibration damping structure consisting of a guide seat, a first guide rod, a slider, a connecting rod and a first elastic element. When the device is subjected to external vibration or impact during operation, the input mechanical kinetic energy can be converted into the elastic potential energy of the first elastic element for dissipation, significantly attenuating the vibration acceleration amplitude transmitted to the internal sensitive element, avoiding signal fluctuations, zero drift or sensitivity reduction caused by vibration, thereby ensuring high-precision and stable humidity detection performance.

[0013] 2. By installing a protective mesh tube around the detection probe, dust, water droplets, particles and other foreign objects are effectively blocked from entering the detection area, preventing contamination or blockage of sensitive elements, ensuring smooth airflow and response speed. The snap-fit ​​structure of limit ring, fixing block, slot and buckle allows for quick assembly, enabling tool-free installation with one-plug-in, and convenient disassembly and maintenance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the humidity sensor, fixing base, and guide base components of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the elastic element, connecting rod, and mounting base of this utility model.

[0017] Figure 4 This is a three-dimensional cross-sectional view of the limiting ring, protective net cylinder, and locking block components of this utility model.

[0018] Figure 5This is a three-dimensional structural diagram of the humidity sensor, suction cup, and audible and visual alarm components of this utility model.

[0019] Reference numerals: 1: Fixed base, 2: Humidity sensor, 3: Guide base, 4: First guide rod, 5: Slider, 6: First elastic element, 7: Connecting rod, 8: Mounting base, 9: Limiting ring, 10: Protective net cylinder, 11: Fixed block, 12: Second guide rod, 13: Sliding plate, 14: Locking block, 15: Second elastic element, 16: Suction cup, 17: Audible and visual alarm. 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] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 A high-precision humidity sensor includes a fixed base 1, on which a humidity sensor 2 is slidably mounted. A guide seat 3 is fixedly disposed at the lower part of the fixed base 1. First guide rods 4, symmetrically distributed on both sides, are fixedly connected to the guide seat 3. A slider 5 is slidably disposed on the first guide rod 4. A first elastic element 6 is sleeved on the first guide rod 4. The left and right ends of the first elastic element 6 are fixedly connected to the slider 5 and the guide seat 3, respectively, providing an inward restoring force for the slider 5. One end of a connecting rod 7 is hinged to the slider 5. A mounting base 8 is fixedly disposed on the upper part of the humidity sensor 2, and the mounting base 8 is hinged to the other end of the connecting rod 7. This constitutes a symmetrical vibration reduction structure. Suction cups 16 are provided at the four corners of the fixed base 1. The design of the suction cups 16 enables the device to be installed quickly, without damage, and repeatedly, improving deployment flexibility and applicability. An audible and visual alarm 17 is installed on the top of the humidity sensor 2. The audible and visual alarm 17 is electrically connected to the humidity sensor 2 to form a linkage response. This connection method is a conventional control method in the prior art. When the humidity sensor 2 detects that the humidity exceeds the set threshold, it automatically triggers the audible and visual alarm 17, emitting a buzzer sound and a high-brightness light to provide auditory and visual warnings, thereby significantly improving the system's safety early warning capability.

[0022] When the humidity sensor 2 is installed on equipment subject to mechanical vibration or impact during operation, the external vibration is transmitted to the entire sensor structure through the fixed base 1. Since the humidity sensor 2 is suspended on the fixed base 1 through a symmetrical vibration damping structure, its inertial mass will generate a relative displacement with respect to the fixed base 1 under vibration excitation. That is, when the equipment experiences vertical or horizontal vibration, a relative movement occurs between the humidity sensor 2 and the fixed base 1. This relative displacement acts on the connecting rod 7 through the mounting base 8, driving the connecting rod 7 to rotate around the hinge points at both ends. This movement is converted into the horizontal sliding of the slider 5 along the first guide rod 4. During this process, the slider 5 moves along the first guide rod 4 under the pushing and pulling action of the connecting rod 7, pressing... The first elastic element 6 is compressed or stretched, so that part of the externally input vibration kinetic energy is converted into elastic potential energy stored in the first elastic element 6. This energy conversion process effectively dissipates vibration energy, realizes attenuation of high-frequency vibration and transient impact, and significantly reduces the acceleration amplitude transmitted to the precision sensitive element inside the humidity sensor 2, thereby ensuring measurement accuracy and long-term stability. When the external vibration excitation disappears, the first elastic element 6 releases the stored potential energy by relying on its own elastic restoring force, pushes the slider 5 to slide in the opposite direction along the first guide rod 4, drives the connecting rod 7 to reset, and finally restores the humidity sensor 2 body to the initial equilibrium position, significantly improving its anti-interference ability and measurement accuracy in complex vibration environments.

[0023] Example 2: Based on Example 1, please refer to... Figure 4 The humidity sensor 2 has a protective mesh sleeve 10 covering its detection probe to prevent dust, water droplets, particles, or other foreign objects from directly contacting or adhering to the surface of the sensitive element, thereby avoiding measurement deviation, response delay, or element contamination. This also ensures unobstructed airflow, preventing any impact on the response speed and accuracy of humidity detection. A limiting ring 9 is located at the top of the protective mesh sleeve 10, and fixing blocks 11 are fixed to both sides of the limiting ring 9. The fixing blocks 11 have slots. Second guide rods 12 are located on both the upper left and right sides of the humidity sensor 2. A sliding plate 13 is slidably mounted on the second guide rod 12. A locking block 14 matching the locking groove is fixedly connected to the lower end of the sliding plate 13. The upper and lower sides of the locking block 14 are designed as inclined guide surfaces to form a wedge-shaped structure, so as to guide the locking block 14 to slide outward during the installation of the protective net cylinder 10 and reduce assembly resistance. A second elastic element 15 is sleeved on the second guide rod 12. The left and right ends of the second elastic element 15 are fixedly connected to the sliding plate 13 and the second guide rod 12 respectively, providing an inward reset elastic force for the sliding plate 13.

[0024] When installing the protective net cylinder 10, the operator slides the protective net cylinder 10 from bottom to top onto the outside of the detection probe of the humidity sensor 2. When the protective net cylinder 10 rises to near its final position, the top of its fixing block 11 first contacts the inclined guide surface of the locking block 14 at the lower end of the sliding plate 13. As the upward force continues to be applied, the fixing block 11 slides along the inclined guide surface of the locking block 14, generating a lateral squeezing force on the locking block 14. This forces the sliding plate 13 to overcome the elastic force of the second elastic element 15 and slide outward along the second guide rod 12, thereby freeing up the installation space for the locking block 14. When the protective net cylinder 10 rises to the predetermined position, the slot on the fixing block 11 aligns with the locking block 14. At this time, the second elastic element 15 releases its stored elastic potential energy, pushing the sliding plate 13 to reset inward, causing the locking block 14 to automatically embed into the slot, completing the mechanical locking. This locked state remains stable without external force intervention, ensuring that the protective net cylinder 10 is firmly fixed to the sensor body.

[0025] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high-precision humidity sensor, comprising a fixed base (1), wherein a humidity sensor (2) is slidably mounted on the fixed base (1), characterized in that, A guide seat (3) is fixedly installed at the lower part of the fixed base (1). A first guide rod (4) is fixedly connected to the guide seat (3). A slider (5) is slidably installed on the first guide rod (4). A first elastic element (6) is sleeved on the first guide rod (4). The two ends of the first elastic element (6) are fixedly connected to the slider (5) and the guide seat (3) respectively. One end of a connecting rod (7) is hinged to the slider (5). An mounting base (8) is fixedly installed on the upper part of the humidity sensor (2). The mounting base (8) is hinged to the other end of the connecting rod (7), thereby forming a symmetrical vibration reduction structure.

2. A high-precision humidity sensor according to claim 1, characterized in that, The detection probe of the humidity sensor (2) is covered with a protective mesh tube (10).

3. A high-precision humidity sensor according to claim 2, characterized in that, The protective net cylinder (10) is provided with a limiting ring (9) at the top. The limiting ring (9) is fixedly connected to both sides of a fixing block (11). The fixing block (11) is provided with a slot. The humidity sensor (2) is provided with a second guide rod (12) on both sides of the upper part. The second guide rod (12) is slidably provided with a sliding plate (13). The lower end of the sliding plate (13) is fixedly connected with a locking block (14) that matches the slot. The second guide rod (12) is fitted with a second elastic element (15). The two ends of the second elastic element (15) are fixedly connected to the sliding plate (13) and the second guide rod (12) respectively.

4. A high-precision humidity sensor according to claim 3, characterized in that, The two sides of the card block (14) are designed as inclined guide surfaces, forming a wedge-shaped structure.

5. A high-precision humidity sensor according to claim 4, characterized in that, The corner of the fixing base (1) is provided with a suction cup (16).

6. A high-precision humidity sensor according to claim 5, characterized in that, The humidity sensor (2) is equipped with an audible and visual alarm (17) at its top. The audible and visual alarm (17) is electrically connected to the humidity sensor (2) to form a linkage response.

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