A flow measurement method of coal mine ventilator based on pressure correlation method

A technology of flow measurement and ventilator, which is applied in mine/tunnel ventilation, mining equipment, mining equipment, etc. It can solve the problems of high sensor safety requirements, high work intensity, and measurement results are easily affected by the environment, and achieve long-term measurement , low cost, and achieve the effect of continuous use

Active Publication Date: 2016-07-13
日照经济技术开发区客商服务有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the current method for measuring the flow of coal mine ventilators, such as high working intensity, easily affected by the environment, and high requirements for sensor safety, to develop a method for measuring the flow of coal mine ventilators based on the pressure correlation method. Method for flow measurement of coal mine ventilator

Method used

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  • A flow measurement method of coal mine ventilator based on pressure correlation method
  • A flow measurement method of coal mine ventilator based on pressure correlation method
  • A flow measurement method of coal mine ventilator based on pressure correlation method

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Embodiment Construction

[0028] The present invention is described in detail below in conjunction with accompanying drawing:

[0029] according to figure 1 The structural connection settings of the components are shown, in which the pressure transmitter a3 and the pressure transmitter b4 are JYB pressure liquid level transmitters, and output current signals of 4mA-20mA, which are connected through cables; the signal acquisition card 5 uses STM32F107VCT6 The built-in analog-to-digital conversion unit has a maximum conversion frequency of 1MHz; the microprocessor is STM32F107VCT6, which has the advantages of high speed and low power consumption; SD card 6 is a 4G SDHC Memory Card; TFT-LCD touch screen 8 uses a 3.2-inch TFTLCD touch screen; RS232 interface 9 is realized by MAX2322 chip; RS485 interface 10 is realized by MAX485 chip; audio interface 11 is composed of 3.5mm audio socket and I2S audio decoding chip.

[0030] figure 2Shown is the flow chart of this method for measuring the flow rate of co...

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Abstract

A method for measuring the flow rate of a coal mine ventilator based on a pressure correlation method belongs to the field of flow measurement of a coal mine ventilator. Aiming at the importance of coal mine ventilation to coal mine safety and the deficiency of current flow measurement methods of coal mine ventilators, the invention can realize long-term, accurate and stable ventilator air volume measurement. By measuring the static pressure of the airflow, processing the static pressure signal and performing cross-correlation calculations, the time interval for the airflow to flow through the two static pressure points is calculated, and the time interval, distance and cross-sectional area of ​​the pipe are calculated from the time interval, distance and cross-sectional area of ​​the two pressure points. The velocity of the airflow. The invention has no movable unit, and can realize long-term, stable and reliable flow measurement of online coal mine ventilators.

Description

technical field [0001] The invention relates to a flow measurement method of a coal mine ventilator based on a pressure correlation method, which belongs to the field of flow measurement of a coal mine ventilator, and in particular relates to a flow measurement method of a coal mine ventilator based on a pressure correlation method. Background technique [0002] Coal mine ventilator is the key equipment for safe production in coal mines, responsible for delivering fresh air underground and diluting poisonous and harmful gases. The power consumption of coal mine ventilators accounts for about 25% or even 50% of the total power consumption of coal mines, and the average efficiency of ventilators is only 57%. The main problems affecting the economic benefits and efficiency of coal mine ventilators are improper selection of ventilators and poor operation management. Once the ventilator is installed, only through reasonable operation management and maintenance can it ensure prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00E21F17/18E21F1/00
Inventor 付胜徐斌高银波
Owner 日照经济技术开发区客商服务有限公司
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