Research On High-precision Ultrasonic Wind Speed Determination Sensor For Mining

At present,the wind speed measurement in mines uses more mechanical and differential pressure wind speed sensors,which are easily affected by the environment and the limitations of the measurement method,thus leading to a larger error in the obtained wind speed measurement value.To address the problem of the low accuracy of these commonly used anemometers in complex situations such as high temperatures and high dust in mines,this paper,in the context of intelligent mine construction,starts from the principle of embedded development combined with a microcontroller to make a mining ultrasonic anemometer and conducts tests to verify the physical,specific research as follows.First of all,the system wind measurement technology has been studied,using the principle of ultrasonic time difference method to the system design.The whole design is divided into six modules: main control unit,power supply,ultrasonic probe channel selection,ultrasonic receiving and transmitting,communication and temperature control.The main control unit uses the STM32F103RET6 microprocessor1 for control,and the value of wind speed and wind direction can be calculated through the relationship between wind speed and ultrasonic wave propagation speed.According to the ultrasonic wave propagation speed and temperature relationship,through the wind speed to convert the ambient temperature at this time,and into the temperature control module to determine whether the sensor working temperature is normal.Finally,the wind speed and wind direction data is transmitted to microprocessor 2 through microprocessor 1,which can be connected to the upper computer through microprocessor 2 to complete the real-time transmission of data communication.Next,the six module circuits were schematically drawn using AD software,resulting in a PCB circuit board and doing intrinsically safe processing.The hardware was also designed and developed using Keil software according to the functional requirements of the system and the actual product was obtained.The final experiments were carried out to test the main circuit links and the real object.At 13 cm from the obstruction,the output of the ultrasonic receiving circuit was amplified and filtered and the peak echo reached 328 m V,which is a significant amplification and filtering effect.The quality of the power supply was tested.The maximum voltage value of 5.40 V,the minimum value of 4.80 and the average value of5.09 V were measured,and the waveform results were relatively stable and the quality of the power supply was good.At the same time,the ultrasonic receiving and transmitting modules were measured under two working conditions,wind and no wind,to verify the accuracy of the physical receiving and transmitting.The wind speed and wind direction values are accurately displayed by the upper computer,and the wind speed measurement sensor has achieved the expected effect of the designed accurate value,which is in line with the industrial production standard and has greater application value.The wind speed measurement sensor has achieved the expected effect of the designed accurate value,meets the industrial production standard and has a large application value.Figure 40 Table 9 Reference 82...