Device for measuring mine dust concentration based on differential principle
A dust concentration and measuring device technology, which is applied in the direction of measuring devices, differential amplifiers, DC-coupled DC amplifiers, etc., can solve problems such as no products, improve measurement accuracy and sensitivity, and filter out adverse effects.
Inactive Publication Date: 2010-12-08
SHANDONG UNIV OF SCI & TECH
View PDF3 Cites 11 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] At present, the domestic use of electrostatic method to measure dust concentration, especially mine dust concentration, is just in its infancy. It is only in the stage of using foreign products to conduct experiments in the laboratory and underground, and there is no product of its own.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] combine figure 1 , figure 2 , image 3 and Figure 4 , a mine dust concentration measuring device based on the differential principle, including a measuring sensitive element 1 and a reference sensitive element 2, the measuring sensitive element 1 and the reference sensitive element 2 are arranged side by side, and the juxtaposed arrangement can both refer to The situation where the measurement sensitive element 1 and the reference sensitive element 2 are closely attached to each other, such as figure 1 As shown, it can also refer to the situation that the measurement sensitive element 1 is slightly separated from the reference sensitive element 2 and fixed on the same connector. In terms of position, it is preferred that the aforementioned two sensitive elements be closely abutted together. The above-mentioned measuring sensitive element 1 includes an insulating tube 101, a ring-shaped electrode 102 and a shielding cover 103. The two ends of the insulating tube 10...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a device for measuring mine dust concentration based on a differential principle. A measurement sensitive element and a reference sensitive element are arranged together in parallel; a signal wire of an electrode of the measurement sensitive element is led out of a shielding case and connected with a first charge amplifier for charge voltage conversion; output signals comprise a valid charge signal and an interference signal; apart from the following difference, other parts of the reference sensitive element are the same as corresponding parts of the measurement sensitive element; orifices at the two ends of an insulating tube are plugged by using an insulating material, so the internal tube cavity becomes a blind cavity; the signal wire of the electrode is led out of the shielding case and connected with a second charge amplifier for charge voltage conversion; the output signal only comprises one same interference signal; and each signal is simultaneously input into a differential amplifying circuit so as to amplify the differential-mode valid signal and filter out the common-mode interference signal. The device can effectively filter out the adverse effects produced by various electromagnetic interferences on the device to improve the measurement accuracy and the flexibility.
Description
technical field [0001] The invention relates to a mine dust concentration measuring device, in particular to a mine dust concentration measuring device based on a differential principle. Background technique [0002] my country is a large coal-producing country. Coal accounts for about 75% of the total energy composition. This situation will not change fundamentally for a long time in the future. A large amount of dust will be generated in the production process of various operating points in underground coal mines. Coal mine dust is very harmful, which can lead to coal dust explosions, and can also induce occupational diseases - pneumoconiosis. Taking effective measures to prevent and control dust is an important task for coal mine safety production. Real-time online detection of dust concentration at each operating point in the mine is an indispensable means to correctly evaluate dust control measures. [0003] At present, the methods for measuring dust concentration main...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01N27/60H03F3/45
Inventor 程学珍曹茂永逄明祥梁慧斌钱晓超张亮李继明
Owner SHANDONG UNIV OF SCI & TECH