A humidity sensor

Abstract

This invention discloses a humidity sensor, belonging to the field of sensor technology. It includes a base, a central rod vertically fixed on the base, a movable cylinder slidably mounted on the upper outer side of the central rod along a vertical direction, and a rotating cylinder rotatably mounted on the lower outer side of the central rod. The rotating cylinder is connected to a rotation drive device. A first ring is connected to the outer side of the rotating cylinder via a first support rod. A first arc-shaped cylinder is mounted on the outer side of the first ring. A lifting device is mounted on the first arc-shaped cylinder. The output end of the lifting device is connected to a vertical moving block. A second arc-shaped cylinder is fixedly connected to the vertical moving block. A second ring is connected to the outer side of the movable cylinder via a second support rod. A flexible pipe is mounted on the inner side of the second ring. The second arc-shaped cylinder is slidably mounted on the outer side of the second ring along its circumference. This invention allows for changing the sampling position as needed, increasing the accuracy of humidity detection.

Description

Technical Field

[0001] This invention belongs to the field of sensor technology, and specifically relates to a humidity sensor. Background Technology

[0002] Humidity sensors play a crucial role in numerous fields. Their measurement principle is typically based on the humidity-sensitive properties of materials, converting the adsorption or absorption of water molecules in the environment into measurable electrical signals. In existing technologies, to monitor humidity in specific environments or enclosed spaces, sampling detection is commonly used. This involves using a power device such as an air pump to extract the gas to be measured from the environment and deliver it to the gas chamber containing the sensor's sensitive element for measurement. Because existing sampling techniques usually employ fixed-position sampling probes, they can only collect gas samples from the local microenvironment surrounding the probe. When a humidity gradient exists within the measured space, the sample obtained by this single-point fixed sampling method cannot represent the average humidity of the entire space or the true humidity condition of the target area, leading to significant deviations in the measurement results. This problem is particularly prominent in processes requiring humidity monitoring of large areas or strict requirements for humidity distribution uniformity, directly affecting the accuracy of subsequent control and adjustment based on humidity data. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a humidity sensor that can change the sampling position as needed to increase the accuracy of humidity detection.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a humidity sensor, comprising a base, a central rod vertically fixed on the base, a movable cylinder slidably mounted on the upper outer side of the central rod along the vertical direction, and a rotating cylinder rotatably mounted on the lower outer side of the central rod. The rotating cylinder is connected to a rotation drive device. A first ring is connected to the outer side of the rotating cylinder via a first support rod. A first arc-shaped cylinder is mounted on the outer side of the first ring. A lifting device is mounted on the first arc-shaped cylinder. A vertical moving block is connected to the output end of the lifting device. A second arc-shaped cylinder is fixedly connected to the vertical moving block. A second ring is connected to the outer side of the movable cylinder via a second support rod. A flexible pipe is mounted on the inner side of the second ring. The second arc-shaped cylinder is slidably mounted on the outer side of the second ring along the circumference of the second ring. A radial rod is also fixed to the outer side of the second arc-shaped cylinder. A radial moving block is slidably mounted on the inner side of the radial rod. A displacement drive device for driving the radial moving block is mounted inside the radial rod. An air intake is mounted on the radial moving block. The air intake communicates with the front end of the flexible pipe. A sensor body is mounted at the end of the flexible pipe.

[0005] Furthermore, the displacement drive device includes a linear motor, which is fixed to the inner side of the outer end of the radial rod, and the output rod of the linear motor is connected to the radial moving block.

[0006] Furthermore, a receiving cavity is formed between the linear motor and the radial moving block. A telescopic pipe connected to the flexible pipe is installed in the receiving cavity. An opening groove is provided on the upper side of the radial rod, and the upper end of the air intake extends out from the opening groove. A channel for connecting the air intake and the telescopic pipe is opened on the inner side of the radial moving block.

[0007] Furthermore, the outer side of the second ring is provided with an annular groove for making way for the flexible pipe.

[0008] Furthermore, the sensor body is installed in the air storage chamber formed inside the second ring. The air storage chamber is connected to an air outlet pipe, and a one-way valve is installed in the air outlet pipe. The end of the flexible pipe is connected to the air storage chamber. At the same time, a first rotating motor is installed inside the second ring. The output end of the first rotating motor is connected to a fan blade. When the fan blade rotates, it is used to generate negative pressure on the air storage chamber.

[0009] Furthermore, the rotation drive device includes a second rotation motor, a rotating shaft, a gear, and a gear ring. The second rotation motor is fixed on the base, and the output end of the second rotation motor is connected to the gear through the rotating shaft. The gear meshes with the gear ring, and the gear ring is fixed on the outside of the rotating drum.

[0010] Furthermore, a slot is provided on the inner side of the second arc-shaped cylinder to allow space for the second support rod.

[0011] Furthermore, a vertical groove is provided on the outer side of the central rod, and a vertical ridge is provided on the inner side of the moving cylinder to slide in conjunction with the vertical groove.

[0012] The beneficial effects of this invention are as follows: The present invention discloses a humidity sensor that, by mounting the air intake on a radially moving block, can drive the air intake to move radially under the action of a displacement driving device. The second arc-shaped cylinder can slide along the circumference of the second ring along with the first arc-shaped cylinder, thus changing the position of different points on the entire surface. Driven by the lifting device, the vertical position of different points can be adjusted to meet actual detection needs. Attached Figure Description

[0013] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the radial rod of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the second ring; Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0014] The following components are labeled in the attached diagram: base 1, center rod 2, moving cylinder 3, rotating cylinder 4, first support rod 5, first ring 6, first arc-shaped cylinder 7, vertical moving block 8, second arc-shaped cylinder 9, second support rod 10, second ring 11, flexible pipe 12, radial rod 13, radial moving block 14, air intake 15, sensor body 16, linear motor 17, output rod 18, receiving cavity 19, telescopic pipe 20, opening slot 21, channel 22, annular groove 23, air outlet pipe 24, first rotating motor 25, fan blade 26, second rotating motor 27, gear 28, gear ring 29, slot 30, vertical groove 31, vertical ridge 32. Detailed Implementation

[0015] like Figures 1-5 As shown, the present invention discloses a humidity sensor, including a base 1. The base 1 supports the main structure and can be fixed on the ground to ensure that the main body will not shake or tilt during use. A central rod 2 is vertically fixed on the base 1. The central rod 2 is vertically arranged, and a movable cylinder 3 is slidably installed on the upper outer side of the central rod 2. The movable cylinder 3 and the central rod 2 do not rotate relative to each other. A rotating cylinder 4 is rotatably installed on the lower outer side of the central rod 2. The rotating cylinder 4 is connected to a rotation drive device, and under the drive of the rotation drive device, the rotating cylinder 4 can rotate relative to the central rod 2.

[0016] A first ring 6 is connected to the outer side of the rotating drum 4 via a first support rod 5. A first arc-shaped cylinder 7 is mounted on the outer side of the first ring 6 and is fixedly installed on the outer side of the first ring 6. A lifting device is mounted on the first arc-shaped cylinder 7, which can also be a linear motor 17. A vertical moving block 8 is connected to the output end of the lifting device, and a second arc-shaped cylinder 9 is fixedly connected to the vertical moving block 8. A second ring 11 is connected to the outer side of the moving cylinder 3 via a second support rod 10. When the rotating drum 4 drives the first ring 6 to rotate, the first ring 6 drives the first arc-shaped cylinder 7 to rotate, and the first arc-shaped cylinder 7 drives the second arc-shaped cylinder 9 to rotate around the central rod 2 via the lifting device.

[0017] Furthermore, a flexible pipe 12 is installed on the inner side of the second ring 11, and a second arc-shaped cylinder 9 is slidably installed on the outer side of the second ring 11 along the circumference of the second ring 11; a radial rod 13 is fixed on the outer side of the second arc-shaped cylinder 9, and a radial moving block 14 is slidably installed on the inner side of the radial rod 13. A displacement driving device for driving the radial moving block 14 is installed inside the radial rod 13. An air intake 15 is installed on the radial moving block 14, and the air intake 15 is connected to the front end of the flexible pipe 12. A sensor body 16 is installed at the end of the flexible pipe 12. The sensor body 16 adopts an existing mechanism and can be used to detect the humidity of the gas inhaled by the air intake 15.

[0018] This invention mounts the air intake 15 on the radially moving block 14. Under the action of the displacement driving device, the air intake 15 can be moved radially, thereby adjusting its radial position. The second arc-shaped cylinder 9 can slide circumferentially along the second ring 11 with the first arc-shaped cylinder 7, cooperating with the radial displacement to change the position of different points on the entire surface. Finally, driven by the lifting device, the position of different points in the height direction can be adjusted to meet actual testing needs.

[0019] In this embodiment, the displacement driving device includes a linear motor 17, which is fixed to the inner side of the outer end of the radial rod 13. The output rod 18 of the linear motor 17 is connected to the radial moving block 14. By directly driving the radial moving block 14 with the linear motor 17, high-precision and high-response linear displacement of the air intake 15 in the radial direction can be achieved. This direct driving method eliminates the backlash and return error that may exist in the intermediate transmission links, ensuring that the air intake 15 can be accurately positioned at the preset detection radius.

[0020] In this embodiment, a receiving cavity 19 is formed between the linear motor 17 and the radial moving block 14. A telescopic pipe 20 connected to the flexible pipe 12 is installed within the receiving cavity 19. An opening slot 21 is provided on the upper side of the radial rod 13, and the upper end of the suction port 15 extends from the opening slot 21. A channel 22 for connecting the suction port 15 and the telescopic pipe 20 is provided on the inner side of the radial moving block 14. The opening slot 21 ensures that the suction port 15 can move smoothly with the radial moving block 14 while maintaining the air passage connection. This compact layout not only protects the integrity of the air passage 22 and ensures the reliability of gas sample delivery, but also makes the entire radial telescopic mechanism structure cleaner, reduces the possibility of motion interference, and improves the long-term operational stability of the equipment.

[0021] In this embodiment, the outer side of the second ring 11 is provided with an annular groove 23 for making way for the flexible pipe 12 to avoid interference.

[0022] In this embodiment, the sensor body 16 is installed in the air storage chamber formed inside the second ring 11. The air storage chamber is connected to an air outlet pipe 24, and a one-way valve is installed inside the air outlet pipe 24. The end of the flexible pipe 12 is connected to the air storage chamber. A first rotating motor 25 is also installed inside the second ring 11. The output end of the first rotating motor 25 is connected to a fan blade 26. When the fan blade 26 rotates, it generates negative pressure in the air storage chamber. The negative pressure generated by the fan blade 26 can actively and quickly draw external gas into the air storage chamber through the air inlet 15 and the flexible pipe 12 for detection by the sensor body 16. Compared with natural diffusion or passive air intake, this design significantly shortens the gas transmission time and improves the sensor's response speed, making it particularly suitable for occasions that require real-time monitoring or capture of rapidly changing humidity signals.

[0023] In this embodiment, the rotation drive device includes a second rotation motor 27, a rotating shaft, a gear 28, and a gear ring 29. The second rotation motor 27 is fixed on the base 1, and its output end is connected to the gear 28 via the rotating shaft. The gear 28 meshes with the gear ring 29, which is fixed to the outside of the rotating drum 4. By controlling the rotation speed and angle of the second rotation motor 27, continuous rotation or intermittent motion at a fixed angle of the rotating drum 4 can be easily achieved. This allows it to work in conjunction with the lifting device and the linear motor 17 to automatically scan a preset path in three-dimensional space or repeatedly detect specific points.

[0024] In this embodiment, the inner side of the second arc-shaped cylinder 9 is provided with a slot 30 for making way for the second support rod 10. This provides clearance space for the second support rod 10 and prevents interference.

[0025] In this embodiment, a vertical groove 31 is provided on the outer side of the central rod 2, and a vertical rib 32 is provided on the inner side of the moving cylinder 3 to slide in conjunction with the vertical groove 31. This provides precise guidance and anti-rotation constraint for the vertical lifting and lowering of the moving cylinder 3. This key-and-groove fit can absorb machining and assembly errors, ensure the smoothness of the moving cylinder 3 when moving up and down along the central rod 2, and effectively prevent unnecessary rotation of the moving cylinder 3 in the circumferential direction.

Claims

1. A humidity sensor, characterized in that: The device includes a base, on which a central rod is vertically fixed. A movable cylinder is slidably mounted on the upper outer side of the central rod, and a rotating cylinder is rotatably mounted on the lower outer side of the central rod. The rotating cylinder is connected to a rotation drive device. A first ring is connected to the outer side of the rotating cylinder via a first support rod. A first arc-shaped cylinder is mounted on the outer side of the first ring. A lifting device is mounted on the first arc-shaped cylinder. A vertical moving block is connected to the output end of the lifting device. A second arc-shaped cylinder is fixedly connected to the vertical moving block. A second ring is connected to the outer side of the movable cylinder via a second support rod. A flexible pipe is mounted on the inner side of the second ring. The second arc-shaped cylinder is slidably mounted on the outer side of the second ring along its circumference. A radial rod is also fixed to the outer side of the second arc-shaped cylinder. A radial moving block is slidably mounted on the inner side of the radial rod. A displacement drive device for driving the radial moving block is mounted inside the radial rod. An air intake is mounted on the radial moving block and is connected to the front end of the flexible pipe. A sensor body is mounted at the end of the flexible pipe.

2. A humidity sensor according to claim 2, characterized in that: The displacement drive device includes a linear motor, which is fixed to the inner side of the outer end of the radial rod, and the output rod of the linear motor is connected to the radial moving block.

3. A humidity sensor according to claim 3, characterized in that: A cavity is formed between the linear motor and the radial moving block. A telescopic pipe connected to the flexible pipe is installed in the cavity. An opening groove is provided on the upper side of the radial rod. The upper end of the air intake extends out of the opening groove. A channel for connecting the air intake and the telescopic pipe is opened on the inner side of the radial moving block.

4. A humidity sensor according to claim 4, characterized in that: The outer side of the second ring has an annular groove for making way for the flexible pipe.

5. A humidity sensor according to claim 5, characterized in that: The sensor body is installed in the air storage chamber formed inside the second ring. The air storage chamber is connected to an air outlet pipe, and a one-way valve is installed in the air outlet pipe. The end of the flexible pipe is connected to the air storage chamber. A first rotating motor is also installed inside the second ring. The output end of the first rotating motor is connected to a fan blade. When the fan blade rotates, it is used to generate negative pressure on the air storage chamber.

6. A humidity sensor according to claim 5, characterized in that: The rotation drive device includes a second rotation motor, a rotating shaft, a gear, and a gear ring. The second rotation motor is fixed on the base, and the output end of the second rotation motor is connected to the gear through the rotating shaft. The gear meshes with the gear ring, and the gear ring is fixed on the outside of the rotating drum.

7. A humidity sensor according to claim 1, characterized in that: The inner side of the second arc-shaped cylinder has a slot for making way for the second support rod.

8. A humidity sensor according to claim 1, characterized in that: A vertical groove is provided on the outer side of the central rod, and a vertical ridge is provided on the inner side of the moving cylinder to slide in conjunction with the vertical groove.

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