An ultrasonic wind speed sensor calibration device

Abstract

The utility model discloses a kind of ultrasonic wind speed sensor calibration devices, comprising: exhaust fan and air outlet flow guide section, the rubber shock-absorbing flange is fixedly connected between the exhaust fan and air outlet flow guide section, the other end of the air outlet flow guide section is fixedly connected with lengthened pipeline, and the air outlet flow guide section is formed inside lengthened pipeline even wind section, the other end of the lengthened pipeline is fixedly connected with air inlet flow guide section pipeline, the other end of the air inlet flow guide section pipeline is fixedly connected with honeycomb rectifier section pipeline;The utility model, overall design is cylindrical, can be used with PVC etc. Low-cost, low-density finished pipe material, material selection is simple, under the premise that the accuracy and stability meet the demand, cost is more inexpensive;Exhaust fan and air outlet flow guide section are connected through rubber shock-absorbing flange, not only eliminate the vibration caused by fan, solve the vortex after soft connection wrinkle, better sealing, more smooth flow surface, airflow is more stable.

Description

Technical Field

[0001] This utility model relates to the field of wind speed sensor technology, and in particular to an ultrasonic wind speed sensor calibration device. Background Technology

[0002] Sensors are indispensable measurement tools in modern industrial production and scientific research. Wind speed sensors continuously monitor wind speed and air volume (air volume = wind speed × cross-sectional area), providing real-time display of wind speed and air volume at a given location. They are crucial tools for measuring ventilation parameters. Wind speed sensors are widely used in various automated equipment applications, such as meteorological stations and environmental protection monitoring and control, monitoring and control of engineering machinery operations, and monitoring and control of other industrial processes related to wind speed and direction. The wind speed data detected by wind speed sensors directly affects the operating performance and accuracy of equipment and systems; therefore, the accuracy and reliability of sensors are paramount. Sensor calibration is an important means of ensuring accurate and reliable sensor output data. Through calibration, the influence of different environmental factors on sensor output can be eliminated, ensuring that the sensor output data is accurate and reliable under given conditions, guaranteeing the accuracy and precision of measurement results. Ultrasonic wind speed sensors, with their high precision and fast response characteristics, have become an important tool for modern wind speed measurement.

[0003] The closest existing technology to this utility model is the patent "A Wind Speed ​​Sensor Calibration Device," patent application number 202420240509.2. In this device, a blower forces airflow through a flexible canvas connection into a rectifier duct to form a uniform airflow section. The airflow passes through the wind speed sensor and wind speed standard of the tested equipment and is finally discharged from the guide plate. The wind speed sensor and wind speed standard are fixed inside the uniform airflow section. Their purpose is to compare the data from the wind speed standard with that from the wind speed sensor under the same conditions, and to calibrate the wind speed sensor by adjusting its internal parameters, thus ensuring it meets the product's performance specifications. An automatic control box controls the operation of the entire calibration device and the wind speed in the uniform airflow section, while a support frame provides support for the entire device.

[0004] The above design has the following problems: 1. The entire calibration device is expensive and bulky; 2. The canvas flexible connection has poor sealing performance, a rough flow surface, high resistance, and wrinkles, which can lead to unstable airflow and affect the stability of test data. 3. The sensor under test is placed inside the air distribution section. The sensor is large and will damage the test environment of the air distribution section, resulting in inaccurate measurement results.

[0005] 4. The fan has a high operating power and emits electromagnetic radiation to external products, which can affect the operation of sensor probes. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing an ultrasonic wind speed sensor calibration device.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: an ultrasonic wind speed sensor calibration device, comprising: The system includes an exhaust fan and an air outlet guide section, both of which are fixedly connected by a rubber shock-absorbing flange. An extended duct is fixedly connected to the other end of the air outlet guide section, and an air distribution section is formed inside the extended duct. An inlet guide section duct is fixedly connected to the other end of the extended duct, and a honeycomb rectifier section duct is fixedly connected to the other end of the honeycomb rectifier section duct. A horn-shaped guide plate is fixedly connected to the other end of the honeycomb rectifier section duct. A wind speed sensor and a standard gauge are installed on the side wall of the extended duct, and the wind speed sensor includes an ultrasonic probe transmitter and an ultrasonic probe receiver. The duct support frame, the air outlet guide section, the extended duct, the air inlet guide section duct, and the honeycomb rectifier section duct constitute the wind tunnel duct, and are fixedly installed on the top of the duct support frame; A fan support frame, wherein the exhaust fan is fixedly installed on the top of the fan support frame.

[0008] Furthermore, both the pipe support frame and the fan support frame are made of metal, and the bottom of the pipe support frame and the fan support frame are fixed to the ground with expansion bolts.

[0009] Furthermore, the surface of the air outlet guide section near the exhaust fan is covered with metal material.

[0010] Furthermore, the standard meter is fixedly installed between the receiving end of the ultrasonic probe and the air outlet guide section.

[0011] Furthermore, two wind speed sensor mounting brackets are fixedly installed on the outer wall of the extended pipe. The ultrasonic probe transmitter and receiver are respectively fixed on the two mounting brackets. The ultrasonic probe transmitter and receiver are inserted into the extended pipe at a 10° angle with the axial direction of the extended pipe. The end faces of the ultrasonic probe transmitter and receiver are installed close to the inner wall of the extended pipe to ensure that the end faces of the ultrasonic probe transmitter and receiver are completely inserted into the extended pipe.

[0012] Furthermore, all the wind tunnel pipes are cylindrical and made of finished PVC pipes.

[0013] The beneficial effects of this utility model are: 1. The overall design is cylindrical, and low-cost, low-density finished pipes such as PVC can be selected. The material selection is simple, and the cost is lower while meeting the requirements of precision and stability. 2. The exhaust fan and the air outlet guide section are connected by a rubber shock-absorbing flange, which not only eliminates the vibration caused by the fan and solves the problem of vortex formation after the soft connection wrinkles, but also improves the sealing performance, makes the flow surface smoother, and makes the airflow more stable. 3. The wind speed sensor (ultrasonic probe transmitter and ultrasonic probe receiver) is installed on the side wall of the wind distribution section. The wind speed sensor is inserted into the wind distribution section (extended pipe) at a small angle along the wind direction, which greatly reduces the volume of the sensor entering the wind distribution section and improves the stability of the wind distribution section. It greatly eliminates the wind speed change in the wind distribution section caused by the sensor probe obstruction, making the wind speed in the wind distribution section in the rectifier pipe more stable. 4. The standard gauge is set at the air outlet end, after the sensor receiver end, and has no effect on the airflow between the sensor transmitter and receiver ends. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0016] The attached figures are labeled as follows: 1. Pipe support frame; 2. Fan support frame; 3. Horn-shaped baffle; 4. Honeycomb rectifier section pipe; 5. Inlet air guide section pipe; 6. Ultrasonic probe transmitter; 7. Ultrasonic probe receiver; 8. Extended pipe; 9. Standard gauge; 10. Outlet air guide section; 11. Rubber vibration damping flange; 12. Exhaust fan. Detailed Implementation

[0017] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 As shown, an ultrasonic wind speed sensor calibration device is disclosed, comprising: an exhaust fan 12 and an air outlet guide section 10, wherein a rubber damping flange 11 is fixedly connected between the exhaust fan 12 and the air outlet guide section 10; the rubber damping flange 11 mainly serves to eliminate the influence of the vibration of the exhaust fan 12 on the airflow in the duct. An extended pipe 8 is fixedly connected to the other end of the air outlet guide section 10, and an air distribution section is formed inside the extended pipe 8. An air inlet guide section pipe 5 is fixedly connected to the other end of the extended pipe 8, and a honeycomb rectifier section pipe 4 is fixedly connected to the other end of the air inlet guide section pipe 5. The honeycomb rectifier section pipe 4 can make the chaotic airflow smooth and stable. The other end of the honeycomb rectifier section pipe 4 is fixedly connected to a horn-shaped guide plate 3. The side wall of the extended pipe 8 is equipped with a wind speed sensor and a standard meter 9. The wind speed sensor includes an ultrasonic probe transmitter 6 and an ultrasonic probe receiver 7. The pipe support frame 1, the air outlet guide section 10, the extended pipe 8, the air inlet guide section pipe 5 and the honeycomb rectifier section pipe 4 constitute the wind tunnel pipe, and are fixedly installed on the top of the pipe support frame 1. Fan support frame 2, and exhaust fan 12 are fixedly installed on top of fan support frame 2.

[0019] Both the pipe support frame 1 and the fan support frame 2 are made of metal, and the bottom of the pipe support frame 1 and the fan support frame 2 are fixed to the ground with expansion bolts.

[0020] Since wind speed sensors are all ultrasonic, they are easily interfered with by low-frequency signals. Therefore, the exhaust fan 12 is placed inside the air outlet of the air outlet guide section 10. The surface of the air outlet guide section 10 near the exhaust fan 12 is covered with metal material to shield the low-frequency electromagnetic field radiated by the exhaust fan 12 during operation. At the same time, a shielding magnetic ring is added to the power supply line of the exhaust fan 12 to shield the low-frequency electromagnetic field radiated by the AC power supply, ensuring the normal operation of the wind speed sensor.

[0021] Standard table 9 is fixedly installed between the ultrasonic probe receiving end 7 and the air outlet guide section 10. Standard table 9 is used to detect the steady flow wind speed and serve as the basis for adjusting the wind speed to the calibrated value.

[0022] Two wind speed sensor mounting brackets are fixedly installed on the outer wall of the extended pipe 8. The ultrasonic probe transmitter 6 and ultrasonic probe receiver 7 are fixed on the two mounting brackets respectively. The ultrasonic probe transmitter 6 and ultrasonic probe receiver 7 are inserted into the extended pipe 8 at a 10° angle with the axis of the extended pipe 8. The end faces of the ultrasonic probe transmitter 6 and ultrasonic probe receiver 7 are installed close to the inner wall of the extended pipe 8 to ensure that the end faces of the ultrasonic probe transmitter 6 and ultrasonic probe receiver 7 are completely inserted into the extended pipe 8.

[0023] The ultrasonic probe transmitter 6 and ultrasonic probe receiver 7 are mostly located outside the extended pipe 8, which greatly reduces the volume of the probe entering the extended pipe 8. This makes the wind speed sensor streamlined inside the extended pipe 8, reducing wind resistance and vortex generation, making the airflow smoother. It also greatly eliminates wind speed changes caused by the wind speed sensor's obstruction, making the wind speed in the wind-averaging section of the extended pipe 8 more stable.

[0024] The wind tunnel ducts are all cylindrical and made of PVC precast pipes, which reduces costs while meeting the requirements for precision and stability.

[0025] The control panel is matched with the exhaust fan 12. The control panel consists of a computer and a frequency converter. The power supply is connected to the frequency converter, and the exhaust fan 12 is connected to the output of the frequency converter. The computer controls the output frequency of the frequency converter to adjust the speed of the exhaust fan 12, thereby realizing the adjustment of the wind speed in the adjustment device.

[0026] In use, turn on the computer, open the inverter control software on the computer, turn on the power switch of the exhaust fan 12, manually set the frequency, and control the exhaust fan 12 to work. The higher the frequency, the faster the exhaust fan 12 rotates and the stronger the airflow. The air enters from the horn-shaped guide plate 3, and passes sequentially through the honeycomb rectifier section pipe 4, the air inlet guide section pipe 5, the extended pipe 8, the air outlet guide section 10, the rubber shock-absorbing flange 11, and the exhaust fan 12, forming a wind tunnel experimental environment.

[0027] The following test data are the actual measured data after the device of this scheme was optimized:

[0028] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An ultrasonic anemometer calibration device, characterized in that, include: A blower (12) and an air outlet guide section (10) are fixedly connected together by a rubber shock-absorbing flange (11). An extended pipe (8) is fixedly connected to the other end of the air outlet guide section (10), and an air distribution section is formed inside the extended pipe (8). An air inlet guide section pipe (5) is fixedly connected to the other end of the extended pipe (8). A honeycomb rectifier section pipe (4) is fixedly connected to the other end of the air inlet guide section pipe (5). A horn-shaped guide plate (3) is fixedly connected to the other end of the honeycomb rectifier section pipe (4). A wind speed sensor and a standard meter (9) are installed on the side wall of the extended pipe (8). The wind speed sensor includes an ultrasonic probe transmitter (6) and an ultrasonic probe receiver (7). The wind tunnel pipe consists of a pipe support frame (1), an air outlet guide section (10), an extended pipe (8), an air inlet guide section pipe (5), and a honeycomb rectifier section pipe (4), and is fixedly installed on the top of the pipe support frame (1). Fan support frame (2), the exhaust fan (12) is fixedly installed on the top of the fan support frame (2).

2. The ultrasonic anemometer calibration device according to claim 1, characterized in that: Both the pipe support frame (1) and the fan support frame (2) are made of metal, and the bottom of the pipe support frame (1) and the fan support frame (2) are fixed to the ground by expansion bolts.

3. The ultrasonic anemometer calibration device according to claim 1, characterized in that: The surface of the air outlet guide section (10) near the exhaust fan (12) is covered with metal material.

4. The ultrasonic anemometer calibration device according to claim 1, characterized in that: The standard table (9) is fixedly installed between the ultrasonic probe receiving end (7) and the air outlet guide section (10).

5. The ultrasonic anemometer calibration device according to claim 1, characterized in that: Two wind speed sensor mounting brackets are fixedly installed on the outer wall of the extended pipe (8). The ultrasonic probe transmitter (6) and ultrasonic probe receiver (7) are fixed on the two mounting brackets respectively. The ultrasonic probe transmitter (6) and ultrasonic probe receiver (7) are inserted into the extended pipe (8) at a 10° angle with the axial direction of the extended pipe (8). The end faces of the ultrasonic probe transmitter (6) and ultrasonic probe receiver (7) are installed close to the inner wall of the extended pipe (8) to ensure that the end faces of the ultrasonic probe transmitter (6) and ultrasonic probe receiver (7) are completely inserted into the extended pipe (8).

6. The ultrasonic anemometer calibration device according to claim 1, characterized in that: The wind tunnel pipes are all cylindrical and made of PVC prefabricated pipes.

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