Dust concentration sensing device
A technology of dust concentration and sensing device, which is applied in the measurement of scattering characteristics, etc., can solve the problems of easy adsorption of dust and affect the reliability of measurement, and achieve the effect of avoiding stray light interference.
Active Publication Date: 2011-04-20
JIANGSU SHINE TECH
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Problems solved by technology
[0005] The disadvantage of the above-mentioned prior art is that the light-emitting part of the laser transmitter and the light-absorbing part of the photoelectric converter are easy to absorb dust, thereby affecting the reliability of the measurement
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Embodiment 1
[0019] See figure 1 -3. The dust concentration sensing device of this embodiment includes: a display box 1 and a probe 2 arranged at the bottom of the display box 1 .
[0020] The probe 2 includes: a tubular dust cylinder 12, a dust cylinder cover 17 sleeved on the dust cylinder 12, a drive motor 10 for driving the dust cylinder 12 to rotate around the central axis relative to the dust cylinder cover 17, and a dust cylinder 12 and The air pipe 9 for clean air in the gap between the dust tube cover 17, the dust brush 16 for wiping the light-emitting part of the laser emitter and the light-absorbing part of the photoelectric converter that is located on the dust tube 12. The dust cylinder 12 is provided with at least one pair of light-transmitting holes 14 and 15 , and a laser emitter and a photoelectric converter are respectively provided on the dust cylinder cover 17 opposite to the pair of light-transmitting holes 14 and 15 .
[0021] The ventilation pipe 9 is connected with...
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The invention discloses a dust concentration sensing device comprising a display box and a probe arranged at the bottom of the display box. The probe comprises a tubular dust cylinder and a dust cylinder sleeve; the dust cylinder is provided with at least one pair of light transmission holes; and a laser transmitter and a photoelectric converter are respectively arranged in positions which correspond to the position of the through hole. When in use, the dust concentration sensing device is hung in natural wind current, the air with dust enters the dust cylinder to be formed into a dust columnirradiated by laser in the dust cylinder, the photoelectric converter receives the scattered light on the dust column, converts the scattered light and sends the scattered light to a single chip microcomputer, and the single chip microcomputer processes the scattered light and finally displays the dust concentration. The probe also comprises a driving motor for driving the dust cylinder to rotateround a central axis with respect to the dust cylinder sleeve; and the dust cylinder is provided with a dust brush for brushing the light emitting part of the laser transmitter and the light absorbing part of the photoelectric converter. Due to the arrangement of the dust brush, the dust concentration measurement is not affected by absorbed dust, and the reliability and the precision of the dust concentration measurement are ensured.
Description
technical field [0001] The invention relates to a dust concentration sensing device, in particular to an instrument for continuously monitoring the dust concentration in natural wind flow. Background technique [0002] At present, for the measurement of dust concentration, dust samplers and direct-reading dust detectors are mainly used. The former uses the principle of filter membrane weighing method: a certain volume of dusty air is extracted, and the dust is captured on the filter membrane. According to the increased dust mass on the filter membrane, the dust mass concentration in the unit volume of air is calculated by using the formula, which has The operation is troublesome, and the dust concentration value can only be obtained through calculation; the latter uses the principle of indirect methods such as light scattering, and uses the sampler for calibration, which can immediately display the measured dust concentration value, but the working time is short and the numb...
Claims
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IPC IPC(8): G01N21/49
Inventor 蒋玉华严春伏新征花梅刘玉坤黄志
Owner JIANGSU SHINE TECH