RU35430U1 - Gas flow corrector - Google Patents

Description

The utility model relates to devices for measuring gas flow and can be used for commercial metering of gas consumption for three working and standard conditions as part of natural gas metering units.

Known flowmeter (RF patent No. 2152003, publ. BI PM 27.06.2000), containing a constricting device, differential pressure gauge, generator, logic circuit, binary and binary decimal counters, two digital-to-analog converters, register, decoder, frequency divider, optocoupler .

The disadvantage of the invention is the complexity of the settings and the inability to obtain information for processing by computer technology ..

As a prototype, a gas flow corrector SPG761 was selected, created by AOZT NPF Logika, St. Petersburg (operation manual RAZHG. 421412.014 RE).

The corrector contains a signal generator from current sensors, a signal switch, a signal generator of the 1st temperature sensor, a signal generator of the 2nd temperature sensor, a buffer amplifier, ADC, a central processor, an interface with an external printer, an interface with a computer, and a non-volatile clock.

The disadvantage of this device is the difficulty of working with data archives using computers, to evaluate different types of information from several remote nodes of the natural gas metering without communication lines.

The technical task of the utility model is to simplify the tuning algorithm for a specific environment, to increase the reliability of the corrector.

The problem is solved in that the gas flow corrector containing a driver of a signal from current sensors, the inputs of which are external inputs of the device, and the outputs are connected to the inputs of the signal switch, two other inputs are connected to the outputs of the signal conditioner of the 1st temperature sensor and signal conditioner 2 temperature sensor, respectively, whose inputs are external inputs of the device, the output of the switch is connected to the input of the buffer amplifier, the output of which is connected through the ADC to the central processor ru, one of the inputs and outputs of which is connected to the non-volatile clock, the second output to the ADC, the third output to the input of the signal switch, and the inputs and outputs are connected respectively to the interface with an external printer, the interface with a computer, non-volatile memory, and an additional autonomous portable unit is introduced

accumulation and storage of information, an indication unit connected by its inputs and outputs to the central processor.

The display unit serves for operational monitoring and control of the gas flow corrector through the keyboard and the actual indication ..

The information storage and storage unit is used to record the results of measurements and calculations in its non-volatile memory for transferring information.

The essence of the utility model is illustrated in the drawing, where Fig. 1 is a structural diagram of a gas flow corrector.

The gas flow corrector contains a driver of a signal from current sensors 1, a driver of signals of the 1st temperature sensor 2, a driver of signals of the 2nd temperature sensor 3, a signal switch 4, a buffer amplifier 5, ADC 6, a central processor 7, non-volatile clock 8, non-volatile memory 8 9, an interface with an external printer 10, an interface with a computer 11, a stand-alone portable unit for storing and storing information 12, an indication unit l3. The stand-alone portable unit for storing and storing information 12 contains a controller 14, non-volatile memory of the unit for storing and storing information 15, an interface with the computer for the unit for storing and storing information 16, an external power supply unit for communication with computer 17. The display unit 13 contains a controller for the display unit 18, an indicator 19, the interface with the unit and the keyboard 20. The signal generator of the 1st temperature sensor contains a current generator 21, a normalizing amplifier 22, respectively, the signal generator of the 2nd temperature sensor - g generator of the current 23, a normalizing amplifier 24.

The gas flow corrector works as follows. Current generators 21 and 23, respectively, of the signal conditioners of the 1st and 2nd temperature sensors 2 and 3 feed current sensors (not shown in FIG. 1). The normalizing amplifiers 22 and 24 of the signal conditioners of the 1st and 2nd temperature sensors 2 and 3 associate the voltage resistance measurement range from -40 ° C to + 50 ° C with the voltage variation range from 0 V to 2.5 V. The signal generator from current sensors 1 converts the current variation range into a voltage variation range from O to 2.5 V. The signals from the signal conditioner from the current sensors 1, from the signal conditioners of the 1st and 2nd temperature sensors 2 and 3 are sent to the inputs of the signal commerce generator 4 which on command of central the processor 7 sequentially connects them to the buffer amplifier 5, and then to the ADC 6, a digital code corresponding to the voltage is read from the ADC 6 by the central processor 7. The non-volatile clock 8 allows the central processor 7 to handle the failure situations

electricity. The interface with the external printer 10 allows you to print the necessary information. The instantaneous values of the gas flow rate are calculated according to a predetermined algorithm and are recorded in non-volatile memory 9. The interface with the computer 11 is used for configuration. The stand-alone portable unit for storing and storing information 12 is removable and is used by route detectors for operational communication with the gas flow corrector during its operation.

Claims (1)

A gas flow corrector containing a driver of signals from current sensors, the inputs of which are external inputs of the corrector, and the outputs are connected to the inputs of the signal switch, the other two inputs of which are connected to the outputs of the driver of the 1st temperature sensor and the driver of the 2nd temperature sensor, respectively whose inputs are external inputs of the corrector, the output of the signal switcher is connected to the input of the buffer amplifier, the output of which is connected to an analogue-digital converter (ADC) a neutral processor, one of the inputs and outputs of which is connected to a non-volatile clock, a second output to an ADC, a third output to an input of a signal switch, and inputs and outputs are connected respectively to an interface with an external printer, an interface with a computer, non-volatile memory, characterized in that it additionally introduced an autonomous portable unit for the accumulation and storage of information, an indication unit, connected by its inputs and outputs to the central processor.