SU525873A1 - Device for measuring aerosol content - Google Patents

Description

(54) DEVICE FOR MEASURING THE CONTENT OF AERUSOL

This invention relates to a technique for measuring the content of an aerosol using electroscopic methods.

The known method of analyzing aerosols using the emission spectral analysis method is 1. However, this method has low productivity, therefore its efficiency in a number of cases is low in contrast to the device with direct analysis of aerosol content.

From the known: the device closest to the one proposed is a device for the content of azrozop. containing 11; her camera with an electrically operated excitation arc - Bio discharge device and device for measuring the intensity of optical radiation in a spectral interval covering one of the lines of the radiation of the substance of HM and equal to its width the range of the spectrum that does not contain the specified lines 2,

However, this device has a low accuracy and reproducibility of the measurement results superimposed on the spectral line which is in line with JiK ioyS & i 4: i; Aec - :; i.::,v. b

Last concentrations of aerosol substance. In addition, the calibration graphs (the dependencies between the output signal and logarI (simulated aerosol content) become nonlinear 5, which is additional 1g.no:; nsh; a.et concentration sensitivity of the known device.

The purpose of the image 8 is to improve the accuracy and repeatability of the measured results.

This is achieved by the fact that the device is equipped with a block of fires to the difference in intensity difference ns, h; at the earls in the specified intervals to the intensity of radiation in the EI interval, there are no lines containing the material of the aerosol.

The drawing shows the proposed g-o device "

The device contains a chamber with electrodes 1 for exciting a dustspan and a system for outputting and measuring the optical density of the ZH5L5-77 in two intervals of the spectrum; This text consists of a .discriminating unit

as prv: snakes 2 (in ka - ;: e; i d.

e. Pergroup1O: augmentation li dnL ;; O.:; / it; HT i Ivi: .. Kvi ::: 1 (lattice), spectral CC-3, followed by photo receiver 4, and spectral gap 5 followed by a photodetector 6. The spectral width of the slit. corresponding to the spectrum interval, covering one of the emission lines of the substance of the analyzed aerosol, is equal to the width of the field corresponding to the spectral inter- face, which does not contain the specified lines. The unit for measuring the ratio of the intensity difference of the radiation in the first and second channel to the intensity in the second: the interval of the radiation spectrum can be. Said press, for example: op, two kakopite.1n.1n.1kh. condensers 7.: 85. are connected ;, to photodetectors, H3MepHTeJibHb; a device 9 and relay 1О for connecting a capacitor 8 or both capacitors to the input of the device, the device operates as follows. The analyzed air is blown between the electrodes 1, and the arc discharge is excited in the interelectrode gap. In the optical radiation discharge, in addition to the background radiation, the spectral characteristics of which are determined by the material of the electrodes contain aerosol material lines. The dispersed system 2 decomposes radiation into a spectrum, with radiation in the first spectral interval covering one of the lines of the aerosol substance passing through slit 3 to receiver 4, and radiation in the second spectral interval through slit 5 to photodetector 6. At the same time The capacitors 7 and 8 produce voltages And and And §, proportional to the respective averaged intensities of the radiation Ej and EE, in the first and second intervals of the spectrum. B: At the beginning of the measuring cycle, a capacitor 8 is connected to the output of the measuring instrument of device 9, at the time of 15. When the voltage Id reaches a predetermined level K, a relay 10 connects to the input of the device 9 oppositely connected capacitors 7 and 8. The signal at the output of the measuring device is proportional to

Sources InforMadi-yg IIpJiHSTbie in the BJiH-

mania during examination:

1,. (Fipecii-os &opN; is, M 11., 1965, 36-42J

2, Patent 13th Shkobritash ivfe E042, Class 27 (1). 1962. K to EiS-Vi i g g 5 g-a, i.e. The desired Beliche distance of the radiation intensity in the first to the second interval to the intensity of the radiation in the Bit interval of the radiation spectrum The logarithm of the signal is taken as a measure of jitter and jitter is 1 jerk and aerosol because of the intensity of the radiation iow, in both intervals, the number is 1 hr and the aerosol is in both intervals and is 1 h, the aerosol is in both intervals, and the ray is iow, and in both intervals it is ij 1 h and aerosol, the intensity of the radiation is iow, and in both intervals it is ij 1 аэ and аэ aerosol, and both aerosols интенсивности iow, the intensity of the radiation is io, and in both intervals it is 4 h and 1 aerosol. ecHJi g; /: ;; nakova, magnifica-Sh El, - E .; Okazytsa ets OJitit koy to the values of kl gvks-ts pstk ksshiadue H line. Els.gsdar jrt-rp.as i / rTCj; / - with "-: LOCOIS Greco-SKRED'S. ,: -5: (C1 ;; /: 1sz it, dbikho; c above. 5 KTftKcr, f.viO: -. ;;: tezh; yEnost1 5 -: Ect:; ly1Oy; a & rosol, t .-., KL: i; afi; TA,.;. -L. ;; -.: Le K51 co-central, c: w:: sae1-sg, visibility to ncEbiiiJii, eTCJi.; -;.,. Results lattsz F o r ivi u Device for, x -.:- ..: -, l ::: - o: oa: ..-, d; aerosol content; e;: “i-eri, s erodat- yu; for vo5u; -hG: .h-, l.: - r.zr.a -: - -: a device for extracting / measuring and measuring the intensity of optical radiation in the interval of the spectrum, covering one of the lines emitting a substance of an aerosol and equal to it across the width of the interval of the seectra., by Mr. So. And so that, in order to improve the accuracy and reproducibility of the measurement results, it is equipped with a unit for measuring the ratio of the difference between the radiation intensities at the specified intervals and the radiation intensity in the interval-gle, not containing; .

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