SU1398589A1 - Gas analyzer - Google Patents

Abstract

The invention relates to analytical instrumentation, in particular to devices for controlling the release of gaseous substances. The purpose of the invention is to improve the measurement accuracy. Modulator 2 of the optical part .1 modulates the working and comparative channels with a shift in time. Block 6 of the differential signal is made in the form of a synchronous filter, and block 7 of the reference signal contains a latch and a synchronous drive. The blocks are controlled by synchronization unit 4. 3 hp f-ly, 4 ill.

Description

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The invention relates to analytical fiber building and can be used to control emissions of industrial enterprises and motor vehicles into the atmosphere, as well as to control technological processes associated with the release of gaseous substances.

The aim of the invention is to improve the measurement accuracy.

FIG. 1 shows a diagram of the device; in fig. 2-4 implementation.

The gas analyzer contains an optical unit 1, which includes a reference and working channels modulator 2, made with air

blunt from block 4. The result of the division is fed to the registrar 9.

The device allows 3 times and more to improve the accuracy of measurements.

Claims (4)

1. A gas analyzer comprising an optical unit containing a radiation source optically coupled through the module, its 10 mountains, working and comparative cells with a radiation receiver connected to a signal processing circuit containing a series-connected amplifier, a differential signal unit, a voltage divider and a recorder, as well as a reference unit voltages, and a synchronization unit associated with the modulator, the outputs of which are connected to the control inputs of the units by jets of alternate cedul of flows. ... ,, .... ,, „." .- radiation and working channels, a signal connected between the output of the radiation amplifier 3, the synchronizer unit 4 and the control divider input, the signal processing circuit including the amplifier 5, the differential signal unit 6, the reference signal unit 7, the divider 8 voltage and recorder 9. Block 6 of the 2Q bass and reference signals, the distinctive signal and divider 8 can be so that, in order to increase the accuracy, they are connected via an additional amplifier | 0 (Fig. 2). The voltage divider 8 and the re-1 stator 9 can be connected via a flock i 1 {fig. 3) synchronous detector {J low-pass filter, control 25 of its input is connected to block 4 of the synchronicity. Block 6 of the differential signal and divider 8. Can be also connected through block 11. The gas analyzer operates as follows. With the help of the modulator 2, the radiation fluxes of the working and reference channels of the optical unit I are modulated with a shift in time. The electrical signal from the output of the radiation receiver 3 is amplified in the measurement site, the modulator is configured to alternately modulate the radiation fluxes in the working and comparative channels, the differential signal unit is made 3 as a synchronous filter, and the reference signal unit includes series-connected level lock and a synchronous drive. 2. Gas analyzer according to claim 1, characterized in that the differential signal unit connected to a divider nagf jelly through an additional amplifier. 3. Gas analyzer according to claim 2, which is different from that the voltage divider and the register, .., - .....,, "J..tor are connected via a synchronous unit The receiver 5 is fed to block b, to the detector -c with a low-pass filter, the code of which forms an electric-input input of which is connected to the block. a signal whose amplitude is proportional-sync. On the difference between the working and supporting radiations 4. Gas analyzer according to claim 1, otlichuyu iys channels. It is necessary that this block; the differential signal and the de-signal is amplified in the amplifier 10 and the voltage driver is connected via a block to the divider 8, to the second input of which the synchronous detector with a lower filter receives a signal from the block 7. stresses for blocks b and 7 with a synchronization block. blunt from block 4. The result of the division is fed to the registrar 9. The device allows 3 times and more to improve the accuracy of measurements. Invention Formula voltages, and a synchronization unit connected to the modulator, whose outputs are connected to the control inputs of the blocks of the signal, connected between the output of the amplifier and the control input of the divider signal and reference signals, which, in order to increase the accuracy signal and reference signals, which, in order to increase the accuracy These measurements, the modulator is designed to alternately modulate the radiation fluxes in the working and comparative channels, the differential signal unit is made 3 as a synchronous filter, and the reference signal unit includes series-connected level lock and synchronous drive. J u ./ 3 // eight