SU999019A1 - Chromatograph program control device - Google Patents

Description

The invention relates to analytical instrumentation and can be used in devices where a series of temporary commands are needed, for example, for software control of chromatographs.

A software device is known comprising a pulse generator connected to a pulse counter,. program switching unit and output logic array 1.

However, the known software device contains a large number of elements of coincidence blocks for a set of programs, which considerably complicates the device and reduces its reliability with a large number of control objects. It is very time-consuming in the known device of the program set operation, at the connection of the inputs of the elements And with the numbers of the decade counters by means of jumpers. The presence of a large number of contact connections also reduces the reliability of the device.

 The closest in technical essence and the achieved result to the proposed one is a device containing a clock impulse generator, which is connected via the AND circuit

with the input of a ten-day counter acting as a time accumulator; decoders decoding the state of the decade counter; matching keys, the inputs of which are connected to the decoders, and the outputs - with digital and Nykhkator, fixing the current cycle time; a composable field connected to the outputs of the decoders and to the inputs of the And elements, the outputs of which are connected to executive triggers connected to the amplifier C2.

Significant disadvantages of the known device are the complexity and

15 time duration for setting the work program of the device, concluding with. in the installation of a large number of jumpers on the dial field between the outputs of the decoders and the inputs

20 elements I.

The aim of the invention is to expand the functionality of the device by increasing the reliability and simplifying the task of working

25 programs of the device.

This goal is ensured by the fact that the device for programmed control of the chromatograph containing a pulse generator, a code converter and sequentially

. |. (in1.1e current time counter according to the keys and indicator of the current (-) in {umen) as well as sequentially (the first and second elements of AND, executive triggers and amplifiers, the outputs of the second And elements are connected to the second inputs Executive triggers, and the input of the code converter is connected to the outputs of the current time clock, a frequency divider, a mode setting unit, the first memory block, a set of time intervals, a channel number setting unit, a decoder and serially connected command counter, the IL element are entered. and the second memory block, the second inputs connected to the outputs of the mode setting block and the first inputs of the first memory block, the third inputs to the outputs of the code converter and the second inputs of the first memory block, the third inputs of which are connected to the outputs of the element OR, the second inputs connected to the output of the blockade of the channel number, the input of which is connected to the input of the device, the output of the pulse generator through the frequency divider is connected to the first input of the current time counter, through the dial of a set of time intervals to the second inputs etchika current time, and after the program counter - to the input of the decoder, the outputs of which are connected to the first input of the first and second elements and, respectively, second inputs connected to the outputs of the first and second memory blocks.

The drawing shows the block diagram of the device for programmatic control of the chromatograph.

The device contains 1 clock generator with frequency divider 2, decade 3-6 current time counter, time setting buttons, matching 8 keys, indicator 9, 10 codes converter, first 11 memory blocks, second 12 memory blocks, 13 commands counter , decoder 14, element OR 15, switches, switches 17 19 modes, first 20 elements AND, second 21 elements AND, executive 12 triggers, amplifiers 23, current time counter 24, block 25 of a set of time intervals, block 26 of command setting, Zlok 27 task modes.

The device works as follows.

Before starting work, a work program is pre-recorded in it. For this, switch 19 is set to Record mode. The switches 16 ... 16 in binary code indicate the number of the command channel. The switch-on time of the command channel is set with the buttons 7 ... 7,. When one of the buttons, for example, 7 is pressed, the pulses from the divider 2 frequencies with a frequency of 1 Hz arrive at the input of the corresponding decade of the counter, for example 3, and are fixed by the current time indicator 9. When the desired digit appears on the indicator 9, the button 7 is released. Similarly, set on the indicator 9 and the remaining time intervals.

Command codes through the elements OR 15 and time codes through the converter 10 codes are supplied to the inputs of the rows and columns of the memory blocks 11 and 12, respectively. By briefly moving the switches 17 and 18 to the ON and OFF positions, respectively, they write the information into the cells of the memory blocks 11 and 12. At the same time, the command activation time is recorded in memory block 11, and disconnections are recorded in memory block 12. Thus, in the cells of the memory blocks 11 and 12, the information on power-on (power-off) and the number of command channels of the device will be recorded.

After recording the program, the device is put into read mode. In this case, the switch 19 is turned to the Read position, and the switches 17 and 18 are turned on and Off, respectively.

In the read mode, the pulses from the oscillator 1 through the divider 2 are fed to the input of the decade counter 24 of the current time, co-thin of which is constantly recorded by the indicator 9 and, through the converter 10, the codes are simultaneously detected on the line of the first and second memory blocks 11 and 12 At the same time, signals from counter 13 are sent to the columns of blocks 11 and 12 of the memory at the same time with a high frequency.

As a result, information is continuously read from memory blocks 11 and 12; The signals from these blocks are fed to the inputs of elements AND 20 and 21, the second inputs of which are sent to the clock, receive synchronizing pulses from the decoder 14. At the same time, the signals from memory block 11 through element AND 20 transfer the actuating triggers 22 to state 1, and the signals from the memory block 12, through the element And state O. Thus, by turning on and off the triggers 22 controlling the output of the amplifiers 23, a temporary sequence of commands, the Work Program, is formed.

Claims (2)

The use of the proposed device made it possible to create a reliable device for software control of the chromatograph, which contains simple technical units, such as counters, a frequency divider, a memory device. The device is effective by rewriting information. In the memory blocks, the problem of recruiting and changing programs was solved. At the same time, a significant simplification of the device and an increase in its reliability due to the implementation of the program set by means of a button were achieved, since the number of contact connections was sharply reduced. Thus, in the proposed device for 16 commands, the setting of programs is carried out with just a few buttons and switches. In addition, the job program setting process is greatly simplified (the set turn-off time is directly indicated on the indicator, and the command numbers are determined by the position of the corresponding switches}. As a result, the program set-up operation takes 10-15 times less time than in similar devices. This leads to the release of operator occupancy time when setting up a large number of industrial chromatographs used to monitor process flows in refineries. Device for the nporpaNHHHoro chromatograph control, containing a pulse generator, a transducer and a serially connected current time counter, matching keys and an indicator, and successively connected first and second elements AND, actuating triggers and amplifiers, and the outputs of the second And elements are connected to the second triggers of the trigger trigger, and the input of the code converter is connected to the outputs of the current time counter, characterized in that, in order to expand the functional device capabilities, a frequency divider, a mode setting unit, the first memory block, a set of time intervals block, a channel number setting block, a decoder and a serially connected command counter, an OR element and a second memory block of the second inputs connected to the outputs of the setting block are entered into it and the first inputs of the first memory block, the third inputs to the outputs of the code converter and the second inputs of the first memory block, the third inputs of which are connected to the outputs of the OR element, the second inputs of the connected to the output of the block Setting the channel number, the input of which is connected to the device input, the output of the pulse generator is connected via the frequency divider to the first input of the current time counter, through a set of time intervals to the second inputs of the current time counter, and through the command counter to the decoder input, the outputs of which are connected with the first input of the first and second elements And, respectively, the second inputs connected to the outputs of the first and second memory blocks, respectively. Sources of information taken into account in the examination 1.Poplavko V.M. Microelectronic discrete time program: 1 device with an operating switch. - Sat. Electronic technology in automation, M., 1976, vol. 8, s. 222-225, 2. Programmer analysis. - Scientific devices, 1976, 11, p. 5559 (prototype). . 2, $ 2 P ,