SU767519A1 - Recording device - Google Patents

Description

(54.) DEVICE FOR REGISTRATION

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This invention relates to a measurement technique. The preferred field of use of the invention is gas-liquid chromatography, g

Chromatography recording devices are known, consisting of an amplifier, a divider, a voltage, and a recording device.

However, these devices imply that JQ costs the operator time to observe the registration process, as well as to switch scales. Besides, due to the possibility of going off-scale, the recording device on individual buses can lose information about the process.

A device is known for recording, primarily chromatography, a serially connected switch block, a block of scaling elements, and a display block I.

Due to the production of an estimated measurement preceding the actual 25 measurement, such a device cannot be used to register processes that cannot be repeated. By. For this reason, the device has a low speed and when register- Q

Long term continuous processes are characterized by the discontinuity of the measurement process, which is one of the possible reasons for the loss of information about the process. These disadvantages reduce the accuracy of the device.

In order to improve the registration accuracy, a forming unit and a pulse distributor are entered into the device, the input of the forming unit being the device input, the first output of the forming unit is connected to the input of the distributor, the pulses whose outputs are connected to the first N-inputs of the switch unit, The N-inputs of which are connected to the second output of the forming unit, and the contacts of each switch in the block are made in the form of selector switching elements with one common contact and several output contacts, the numbers equal to the number of scaling elements.

The forming unit is designed as a threshold device with a relay characteristic.

The forming unit is made in the form of a threshold device with a relay characteristic, the output of which is connected to the ieH Kdvuhm valves connected oppositely on the full input. FIG. 1 shows a device diagram; in fig. 2 is a schematic diagram of a device. The registration device contains a forming unit 1, a distributor of 2 pulses, a block of 3 controlled switching elements, a lecting switching elements block 5 of scaling devices, a display b block, a comparator signature 7, gates 8 and 9. A necessary condition for the normal operation of the device is that the registered process must consist of sections with different extreme values, separated by zero segments or at least one zero value. It can be as a unipolar process with zero segments or at least one zero value. This can be either a unipolar process. With zero parts, or a bipolar process. A prerequisite for normal operation of the device is also the availability of a priori information about the expected range of variation of the extreme value of each of the Controlled process. Suppose that it is necessary to register the kth segment of the controlled process with the ith scale. Before starting work, it is necessary on the basis of a priori information about the range of measurement of the extreme value of each of the control areas to switch the cooTBeTCT3: snoM; ux selector comms of the 1st elements of the AEB from 1 to m, Eu6paHHO; viy i -mg of the k-rd representation of the process. The device works in a cneflysontHM manner. Signals: appropriately adapted to the y process, arrive successively in time at the formation unit 1, which converts the monitored unipolar segments into regular angle pulses of a certain amplitude with a duration equal to the duration of the corresponding section. From the output of the forming device, these pulses come to the input of the distributor 2 pulses, which can be triggered from both positive polarity pulses and negative polarity pulses, respectively, for the positive and negative portions of the monitored process. The distributor of 2 pulses implements: it separates the physical channels of information transfer depending on the number of controllers of the process and converts the sequential sending of pulses into a parcel on parallel channels. Sra- The pulse dispenser shaft is carried out on the leading edge of the incoming pulse, i.e. each time another pulse arrives from the formation unit 1. The pulse distributor 2 controls the operation of the control switching unit 3. The duration of the output pulses from the pulse distributor is equal to the time interval between the leading edges of the adjacent input pulses, i.e. no less than the duration of the k-ro registered part of the process. At the end of the registration, the pulse distributor under the action of the pulse resets to the initial state. The impulse from the distributor impulse goes to the control inputs of the KOMNtyTKpyKsunx controlled elements of the com-controlled / wiping elements 3 so that the k-th pulse from the 1-block is transformed through the k-th channel of the distributor 2 pulses to the k-ro control controlled switching element. Under the action of the k-ro control pulse, a transmission channel k-ro of the controlled part of the process is formed through the signal input k-ro of the controlled switching element to the input k-ro of the selector switching element of the block 4 of selector switching elements. The duration of the existence of this channel is equal to the duration of the k-ro output pulse of the distributor 2 pulses. Formed by the kth selector co s s i ting element of the i th channel, information about the monitored site is sent to the i – e scaling device of the scaling device block 5 in which the controlled area of the p-foot with the i-M scale is scaled. The output of the 1st scaling device is the scaled information fed to the input of the display block b. The operation of the forming device shown in FIG. 2 is carried out as follows. If the input of the comparator signature 7, which represents the threshold device with a relay characteristic, is fed to the positive section of the recorded process, then the working section of the comparator 7 is the positive part of the relay characteristic. In this case, from the output of the comparator 7, a positive polarity pulse through the valve 8 is fed to the positive input of the distributor 2 pulses. If the negative portion of the recorded process is fed to the input of the comparator-signature 7, then in this case the working portion of the comparator 7 is the negative part of the relay characteristic. In this case, from the output of the comparator 7, a negative polarity pulse through the valve 9 is fed to the negative input of the pulse distributor.

The device makes it possible to increase the registration accuracy of the controlled process by eliminating the off-scale recording of the device on chromatographic peaks.

Claims (3)

1. A device for recording, mainly chromatograms, comprising a series of switch unit, a block of scaling elements and an indication unit, characterized in that, in order to improve the registration accuracy, a forming unit and pulse distributor are inputted, the input of the forming unit being an input of the device , the first output of the forming unit is connected to the input of the pulse distributor, the outputs of which are connected to the first N-inputs of the switch unit, to the second N-inputs of which the second output is connected d forming unit and the contacts of each switch in the block are in the form of selector switching elements with a common terminal and multiple output terminals, whose number is equal to the number of scaling elements. 2. The device according to claim 1, characterized in that the formation unit is made in the form of a threshold device with a relay characteristic. 3. The device according to paragraphs. 1 and 2, about t that block 5, the formation is made in the form of a threshold device with a relay characteristic, the output of which is connected to two valves connected oppositely by a single input. 0 Sources of information taken into account in the examination 1. Golbert K.A., Vigdergauz M.S. The course of gas chromatography, M. 1974, p. 178. 2. The patent of Germany No. 2110616, 5 cl. G 01 N 21/22, published 1973, (prototype). Entry about