SU1522190A1 - Device for information input - Google Patents

Abstract

The invention relates to automation and computing and can be used to enter information from chromatographic composition analyzers into digital computing systems. The purpose of the invention is to increase the reliability of the device. Introduction of a pulse generator, a time counter, a second trigger, two comparison blocks, a multiplexer, a register, a pulse former and the third element I into the device allowed us to control the health of the analog-digital converter of the device, overflow of the peak area counter and operation of the entire device. A final check is performed by comparing the measured area of the reference point with a reference. Fault codes are transmitted to the computer via the output data bus. 1 il.

Description

The invention relates to automation and computer technology and can be used to enter information from chromatographic composition analyzers into digital computing systems.

The aim of the invention is to increase the reliability of the device.

The drawing shows a functional diagram of the proposed device.

In the drawing there are: corrector 1 zero, - analog-to-digital converter (ADC) 2, maximum 3 sensors and. minimum 4, counter 5 peaks, deshi | rater 6 {pulse generator 7, time counter 8; first inputs 9 of the control code of the device, the first

unit 10 comparing the first 11 and second 12 triggers; element NOT 13; the first 14, the second 15 and the third 16 elements AND} the first 17 and the second 18 elements OR; delay element 19 third element OR 20; a block of 21 elements OR j a peak area counter 22, a pulse shaper 23} a second comparison block 24; multiplexer 25, - register 26; the second 27, third 28 and fourth 29 inputs of the control code of the device, address inputs 30 and 31 of the multiplexer 25, sensors 32-35 of the control code.

The device works as follows.

A / D converter 2 converts the input analog signal to a frequency or number-pulse code. Permanent memory blocks (RAM) or reprogrammable permanent memory blocks (PROM) are used as control code sensors 32-35.

The analog input signal is fed to the input of offset 1 zero, in which the zero value of the chromatograph signal is subtracted from the input signal. At the same time, the input signal enters the sensor 3 of the maxima and the sensor 4 of the minima, which generate a pulse signal at the moment the input signal passes, of the maxima and minima, respectively. From the output of the zero offset, the signal is fed to the input of the analog-digital converter 2, to the output of which counter 22 is connected. Before the device starts its operation, the signal to start the analysis through the element OR 20 is fed to the reset input of the counter 22 and sets it to zero, the same the signal sets the trigger 12 to one state and through the block of 21 elements and the pulse shaper 23 arrives at the interrupt output of the device. Since the address inputs 30 and 31 of the multiplexer 25 are supplied with zero-level signals, the output of counter 22 is connected via multiplexer 25 to the information input of register 26, to the gate input of which a pulse signal is received from the output of the pulse distributor 23. In this case, the register 26 records the contents of the counter 22 (zeros in all bits). The computer interrupts the signal and reads out from register 26 this code, which is a sign of the beginning of the analysis.

The signal from the output of the analog-digital converter is integrated by the counter 22 for a time equal to the duration of each peak, and then (at the end of the peak) the signal from the output of the sensor 4 minima through the block 21 of the elements OR is fed to the driver 23 of pulses, which generates a pulse signal rewriting the area code of the peak from counter 22 to the register 26. The same signal from the output of the pulse former 23 is sent to the input of the computer shutdown, which is

five

0

five

0

five

0

five

0

five

Secondly, the machine reads the contents of register 26 (peak area).

In addition to transmitting the main measurement information, the device monitors the health of the chromatograph and individual units of the device itself. In this case, malfunction signals are transmitted to the computer via the same communication lines along which the values of the peak areas are transmitted. This is achieved as follows. Let n communication lines be used to transmit information from the device to the computer (with n-bit counter 22). The maximum possible number of code combinations that can be transmitted along these lines is 2, and we will use codes of numbers from 1 to 2-4 to transfer the values of the areas of chromatographic peaks. The remaining 4 code combinations will be used as follows: code zero - a signal to start the analysis; the code of the number 2-3 is a signal that exceeds the allowable capacity of the counter 22 (stored in the sensor 32); the code number 2 -1 is the signal that the control peak holding time does not match the nominal value (stored in sensor 33); The code number 2-2 is an analog-to-digital converter malfunction signal (stored in sensor 34).

The monitoring of the health of the chromatograph is carried out by comparison. the retention time of the control peak of the chromatogram with its nominal value recorded in the sensor 35. The retention time is measured as follows. By the start of analysis signal, the trigger 11 is set to one, the counters 5 and 8 are set to the zero state. In this case, the signal from the output of the trigger 11 permits the passage of 8 signals from the oscillator 7 through the element 14 to the clock input of the timer, as a result of which the counter 8- counts the current time (from the beginning of the analysis). Counter 5 counts the maximum signals. When the input of counter 5 receives the maximum peak signal of the control peak connected to the output of counter 5, the decoder 6 generates a second level signal at the second output, which is fed to the reset input of trigger 11, thus prohibiting the passageway 51

It is transmitted through the And. 14 element of the signal generator 7. Thus, in the counter 8, the code of the retention time of the control chromatogram peak is recorded. At the same time, the signal from the second output of the decoder 6 is fed to the first input of the element AND 16, the resolution & - the passage to its output of the signal from the output of the element NOT 13. If the measured (recorded in the counter 8) retention time is equal to the nominal (recorded in block .9 memory), then on the go-go of the comparison unit 19 there will be a single signal, and at the outputs of the elements NOT 13 and AND 16 there will be a zero signal. Otherwise, the output of the AND 16 element will be a single signal that will go through the element OR 17 to input 30 of multiplexer 25, and through a block of 21 elements OR at the input the driver 23. At the same time, a pulse appears at the output of the generator 23, which is fed to the interrupt input of the computer and the gate input of the register 26. Since the address inputs 30 and 3 of the multiplexer 25 are given signals 1 and O, respectively, the output The memory block 28 through the multiplexer 25 will be connected to the input of the register 26, and the contents of the sensor 33 will be copied to the signal from the output of the pulse shaper 23 (the code of the signal of the mismatch of the hold time of the control peak to the nominal value).

Monitoring the operation of the analog-digital converter is performed as follows.

By signal The start of the analysis, trigger 12 is set to one; condition. If the ADC is healthy, then the pulses from its output set trigger 12 to the zero state, otherwise trigger 12 will remain in one state. Poll -. the state of the trigger 12 is carried out by the signal from the first output of the decoder 6, which is fed to the first input of the element 15, to the second input of which a signal is output from the output of the trigger 12. If the trigger is in one state (the ADC is faulty), then the output of the element i 15, the unit level signal is transmitted through the OR element 18 to the input 31 of the multiplexer 25, and through the block 21 elements OR to

50

5 o

Q

0 5

five

906

the input shaper 23 pulse. In this case, a pulse signal appears at the output of the pulse generator 23, which is fed to the interrupt input of the computer and the gate input of the register 26. Since, however, the output inputs 30 and 31 of the multiplexer 23 are loaded with signals O and 1, respectively, the output sensor 34 through multiplexer 25 will be connected to the input of register 26, into which the output of sensor 34 (ADC fault signal code) will be copied to the signal from the output of pulse shaper 23.

The monitoring of the exceedance of the permissible capacity of the counter 22 is carried out by continuous comparison with the block 24 of the code of the number recorded in the sensor 32 with the code of the number contained in the counter 22. When equal. These codes receive a single level signal at the output of comparator block 24, which is through the elements. OR 17 and 18 is fed to the inputs 30 and 31 of the multiplexer 25, and through the block OR 21 elements - to the input of the imaging unit 23 pulses. In this case, a pulse signal appears at the output of the generator 23, which is fed to the input of the computer shutdown and the gate input of the register 26. Since the signals of the logical unit are fed to the inputs 30 and 31 of the multiplexer, the output of the sensor 32 through the multiplexer 25 will be connected to the input register 26, in which the signal from the output of the imager 23 will be copied to the sensor 32 (the signal code exceeds the allowable capacity of the counter 22).

The processing of information coming from the device to the computer is carried out as follows. I

When receiving (by breaking) each successive code of a number, the machine checks it for equality to zero. If the equality is not satisfied, the machine continues the execution of the current program. If the received code is zero, the machine proceeds to the subroutine for calculating component concentrations based on the received area values with the chromatographic peaks. In this case, in order to distinguish the peak area code from the fault codes, each code with the number code is applied.

2-4, If the received number is greater than 2-4, this indicates that a trouble code has been received, otherwise a peak area code is received.

Claims (1)

The proposed device allows improving the reliability of automated information processing systems from chromatographic analyzers. Invention Formula A device for entering information containing a zero offset, analog-to-digital converter, maximum and minimum sensors, peak counter, peak area counter, decoder, first trigger, two AND elements, three OR elements, OR block of elements, NOT element and delay element, equalizer inputs the zero and minimum and maximum sensors are combined and are the information input of the device, the zero output is connected to the analog / digital converter input, the peak counter outputs are connected to the decoder inputs, characterized in that The device has a higher reliability level, a pulse generator, a time counter, a second trigger, two comparisons, a multiplexer, a register, a pulse shaper, and a third AND element, the pulse generator, are connected to the first input of the first AND element, the output of which is connected to a clock input of a time counter, the outputs of which are connected to the inputs of the first group of the first comparison unit, the inputs of the second group of which are the first inputs of the control circuit of the device, the output of the maximum sensor is connected to the clock input the peak counter, the first output of the decoder is connected to the first input of the second element I, the second output of the decoder is connected to the first input of the third element Ne the reset input of the first trigger, the output is ana-. the logo-digital converter is connected to the reset input of the second trigger and the clock input of the counter in the peak area, whose codes are connected with the information inputs of the first group of multiplexer and the inputs of the first group of the second comparison unit, the output of which is connected to the first input of the block of OR elements and the first inputs of the first and second OR elements, whose outputs are connected respectively to the first and second address inputs of the multiplexer, whose outputs are connected to the information inputs of the register, the outputs of which are the information outputs of the device, the reset inputs of the peak and time counters, the installation inputs of the first and second triggers. the second input of the OR block and the first input of the third OR element are combined and are the input of the analysis start of the device; the outputs of the first and second triggers are connected to the second inputs of the first and second elements AND, respectively; the output of the second AND element is connected to the third input block of elements OR and the second input of the second element OR, the output of the first comparison unit is connected to the input of the element NOT, the output of which is connected to the second input of the third element AND, the output of which is connected to the second input of the first element OR and a quarter The input of the OR block, the output of which is connected to the input of the pulse former, the output of which is connected to the gate input of the register and is the output interrupt of the device a, the output of the minimum sensor is connected to the fifth input of the element element OR and the input of the delay element whose output is connected with the second input of the third OR element, the output of which is connected to the reset input g of the peak area counter, the information inputs of the second multiplexer group and the inputs of the second group of the second comparison unit are combined and are the second and the inputs of the control code of the device, the information inputs of the third and fourth groups of the multiplexer are the third and fourth inputs of the control code of the device.