CS234311B1 - Plugging in the module of program controlled galvanically isolated sine wave transducers to double rectangular waveform - Google Patents

Abstract

The connection of the module of program-controlled galvanically isolated sinusoidal waveform converters to a double rectangular waveform is intended for ensuring the transmission and processing of control-controlled sinusoidal waveform quantities for use mainly in the control of working machines and technological processes in real time. The connection according to the invention consists of a block of a controlled technological process, which is connected to the module of program-controlled galvanically isolated sinusoidal waveform converters to a double rectangular waveform, the outputs of which are connected to a unit of contact with the environment, which is connected to a control microprocessor system, the required control signals of which are introduced via the galvanically isolated module to individual actuators of the block of a controlled technological process.

Description

The invention relates to the connection of a module of program-controlled galvanically isolated sine wave transducers to a double rectangular waveform utilizing, in particular, for the transmission of control quantities between actuators of a controlled technological process and a microprocessor control unit interface.

The circuits known to date, used in conjunction with transmission lines for the transmission of control quantities, galvanic isolation and signal processing in the form of converting a sinusoidal waveform to a double rectangular waveform, utilize the characteristics of conventional active circuits, transformer isolation and oscillation coupling. This form of control signal processing no longer satisfies the design of control microprocessor systems in terms of functional mounting space, working baud rate, signal transmission method and especially the reliability of signal transmission, which is a prerequisite for real-time control of technological processes.

According to the invention, the connection of a programmable galvanically isolated sine wave transducer module to a double rectangular waveform is based on the fact that the individual current transmission lines of the controlled technological process are connected to the first inputs of the programmable galvanically separated sine wave transducer module into a double rectangular waveform. conversion of control - controlled quantities of sinusoidal waveform to double rectangular waveform, programmatic

234 311 control blocking preselection and galvanic separation of the process control lines from the microprocessor control system, whereby the outputs of the programmable galvanically isolated sinusoidal to double rectangular waveform module outputs are connected to the inputs of the program interface unit control quantities between the process control process and the microprocessor control system via the bidirectional bus I / O and that the single-bit control quantities from the microprocessor system are connected to the process control input through the galvanic isolation of transmission control lines, with the individual outputs of the environment interface module connected to the second inputs of the programmable galvanically isolated gear module sinusoidal waveform to double rectangular waveform, where logical functions generate program presets for blocking the transmission of control - controlled quantities according to the requirements of the technological process ·

The circuitry according to the invention overcomes the previous disadvantages and drawbacks of the above and has advantages over earlier circuitry. Its biggest advantages are functional simplicity, high transfer rate, single-conductor current transfer of the control - controlled quantity, galvanic separation of the transmission line from the control microprocessor system, conversion of the control - controlled sine wave to double rectangular waveform, high reliability, small mounting space and low power consumption. the advantage is the possibility of program pre-selection of the blocking of the transmission of the control - controlled quantity according to the requirements of the technological process ·

The circuit according to the invention is evident from the attached figures. Figure 1 is a block diagram of the module wiring

programmed galvanically isolated sinusoidal waveform converters to double rectangular waveform in function with microprocessor control system · Fig. 2 shows the internal arrangement of one programmed galvanically isolated sinusoidal waveform converter to double rectangular waveform ·

The wiring of a programmable galvanically isolated sine wave transducer module to a double rectangular waveform consists of a controlled technological process 1, which is connected to the inputs 11. 12. to ln by means of transmission lines. module 2 of programmed galvanically isolated sinusoidal to double rectangular waveform transducers comprising a first operating resistor 301. a first optoisolating member 302. a second optoisolating member 303. a second operating resistor 304. a first inverter 305. gate with an open collector 306. a second inverter 307 ". wherein the outputs 21, 22 to 2n of the programmable galvanically isolated sinusoidal to double rectangular waveform module are connected to the individual inputs of the environmental interface unit 2, wherein the environmental interface unit 2 is connected to the microprocessor control system 2 via bidirectional bus I / O and that the unidirectional bus output of the environmental interface unit 2 is connected to the input of the process control process 1 via a module 6 of galvanically isolated transmission control lines, wherein the individual outputs of the environmental interface unit 2 are connected to the inputs 31 of the module. 2 programmed galvanically isolated sinusoidal to double rectangular waveform converters ·

The circuit according to the invention works in such a way that the individual sine wave control elements from the actuators of the technological process 1 are fed via individual transmission lines to individual inputs 11, 12 to In of module 2 of the programmed galvanically isolated sine wave transducers to double. rectangular waveform ·

In an exemplary embodiment, the control sinusoidal quantity from the process actuator 1 is connected to the input terminal 11 of the module 2 of the programmed galvanically isolated sine wave transducers to a double rectangular waveform where the diode of the first optoisolation member 302 is activated by a positive half period. · Optical coupling gradually excites the transistors of the first and second optoisolating members 302 · 303 «, thus defining the required rectangular waveform at twice the frequency at the output of the first inverter 305 · Na The output of the second inverter 307 is the required shaped rectangular waveform of the control variable in the negated form, which is connected to the output terminal 21 of the module 2 of the programmed galvanized Terminal 31 is connected to the gate input 306 with open collector, which functions as a program preset input for blocking the control - controlled quantities transfer. Individual outputs 21, 22 to 2a from the module 8 of the programmed galvanically isolated converters. the sinusoidal waveform to the double rectangular waveform are connected to the environmental interface unit 2 and logically processed according to the requirements of the controlled process 1 through the bi-directional bus input / output in the microprocessor control system. »Via the module 4 of galvanically separated transmission control lines, they are fed to the multiple bus input of the controlled technological process 1 · Also the program logic preselection signals The y generated in the unit J is connected

- 5 234 311 for the individual inputs 31. 32 and 3n of the module 2 of the program-controlled galvanically isolated sine wave to double rectangular waveform transducers.

The above-described wiring can be used wherever reliable current transfer, galvanic isolation and conversion of the sine waveform of the process variable to the required rectangular waveform of twice the frequency is required.

Claims (2)

Object of the invention 234 311 AND 1 · Connection of a programmable galvanically isolated sinusoidal waveform converter to a double rectangular waveform using more than one programmable galvanically isolated sinusoidal waveform converter to the double rectangular waveform, where each converter input is connected to a separate current transfer line, that the first inputs (11), (12) to (ln) of the module (2) of the programmed galvanically isolated sinusoidal to double rectangular waveform transducers are connected to the individual power transmission lines of the controlled process process (1), the outputs (21), ( .22) to (2n) the module (2) of the programmed galvanically isolated sinusoidal to double rectangular waveform transducers are connected to the inputs of the environmental interface unit (3) and that the environmental interface unit (3) is connected to a control micro an opto-processor system (5) via bidirectional bus input-output, wherein the bus unidirectional output of the environmental interface unit (3) is connected to the input of the process control process (1) via the galvanic isolation of transmission control lines, and 3) the environmental contact units are connected to the second inputs (31), (32) to (3n) of the module (2) of the programmed galvanically isolated sine wave converters to the double, self-contained rectangular waveform · 234 311 Connection according to Claim 1, characterized in that the module (2) of the programmed galvanically isolated sinusoidal to double rectangular waveform transducers consists of a first opto-isolating element (302), a second opto-isolating element (303), a second resistor (304), a first inverter ( 305), a second inverter (307), an open collector gate (306), a first working resistor (301) connected to an input terminal (11) by one terminal, the other side of the resistor being connected to a common point with the anode diode of the first optoisolation a second optoinsulating member (302) and a cathode of the second optoinsulating member (303), the diode of the first optoinsulating member (302) being coupled to a common point with the diode of the second optoinsulating member (303) and the country controlled process (1); and the second optoinsulating member (302), (303) are coupled to a common point with the second work the second output of the second working resistor (304) is connected to the supply voltage terminal (+ tL ') and that the input of the first inverters (305) is connected with the output of the open collector gate (306) and simultaneously with the collectors transistors of the first and second optoisolating members (302), (303), wherein the emitters of the transistors of the first and second optoisolating members (302), (303) are coupled to the working ground of the microprocessor control system (5), and connected to the input of the second inverters (307) and that the output of the second inverters (307) is connected to the output terminal (21) of the module (2) of the programmed galvanically isolated sine wave transducers into a double rectangular waveform; Program controlled galvanically isolated sinusoidal to double rectangular waveform converters are connected to the gate input (30 6) with open collector. 2 drawings