CN202694024U

CN202694024U - Intelligent simulation instrument

Info

Publication number: CN202694024U
Application number: CN 201220305583
Authority: CN
Inventors: 孔亚广; 邹洪波; 史兴盛; 徐哲; 陈张平
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2012-06-25
Filing date: 2012-06-25
Publication date: 2013-01-23
Anticipated expiration: 2022-06-25

Abstract

The utility model discloses an intelligent simulation instrument. The utility model comprises a power supply module circuit, an I/V conversion circuit, a V/I conversion circuit, a serial port interface circuit, a microprocessor module circuit, a liquid crystal display module circuit and an external interface circuit. The I/V conversion circuit is connected to the I/O port signal of the microprocessor module circuit, the V/I conversion circuit is connected to the I/O port signal of the microprocessor module circuit, and the liquid crystal display module circuit is connected to the I/O port of the microprocessor module circuit Signal connection, the serial port interface circuit is connected with the serial port of the microprocessor module circuit, the I/V conversion circuit is connected with the external interface circuit, the V/I conversion circuit is connected with the external interface circuit, and the power supply module circuit is a microprocessor module circuit, I Power supply for /V conversion circuit, V/I conversion circuit, liquid crystal display module circuit and external interface circuit. The utility model saves energy and raw materials, has realistic simulation, is practical, safe and reliable.

Description

A kind of intelligence simulation instrument

Technical field

The utility model belongs to the industrial simulation technical field, relates to a kind of intelligence simulation instrument.

Background technology

Along with the process of globalization and information, emulation technology extensively is incorporated in all trades and professions, plays an important role at process industry especially.Process industry has flow process complexity, Highgrade integration, the horizontal high of operation auto-control, only has the operation of long-term safety just can obtain satisfied economic benefit, therefore requires production operators to have higher technical merit and operative skill.

Because the actual production line generally operates under the normal operating mode, the maloperation meeting causes serious consequence, and general training on operation is difficult to reach actual purpose.Emulation training is a kind of modern, and high efficiency training means are a kind of effective ways that improve operative employee's technical ability.

For just allow the skilled worker be familiar with operating environment, skilled operation is the training and teaching system of purpose, the instrument and meter device that uses industry spot just can use, be undoubtedly a kind of waste, and making side can not find suitable replacement scheme for the moment, and the exploitation of intelligent field simulation instrument is tackled just this application and occurred.Replace real sensor, transmitter and actuator with smart fields emulation instrument, can be reduced greatly at cost, and do not need really fluent solution in pipeline, chemical materials, the major accident that can avoid the skilled worker to cause owing to maloperation have on the other hand been saved on the one hand.

Summary of the invention

The utility model provides a kind of intelligence simulation instrument for the deficiencies in the prior art.

The utility model is by the following technical solutions:

The intelligence simulation instrument comprises power module circuitry, I/V translation circuit, V/I translation circuit, serial interface circuit, microprocessor module circuit, LCD MODULE circuit and external interface circuit.

The I/V translation circuit is connected with microprocessor module circuit I/O mouth signal, the V/I translation circuit is connected with microprocessor module circuit I/O mouth signal, the LCD MODULE circuit is connected with microprocessor module circuit I/O mouth signal, the serial ports of serial interface circuit and microprocessor module circuit joins, the I/V translation circuit is connected with external interface circuit, the V/I translation circuit is connected with external interface circuit, and power module circuitry is microprocessor module circuit, I/V translation circuit, V/I translation circuit, LCD MODULE circuit and external interface circuit power supply.

Described power module circuitry comprises+the 15V voltage conversion circuit and+the 5V voltage conversion circuit, + 15V voltage conversion circuit comprises polar capacitor C12, C11, capacitor C 6, C7, C8, C9, C10, power supply chip VR1, and+5V voltage conversion circuit comprises capacitor C 1, C2, C3, C4, C5 and power supply chip VR2; The positive pole of+15V voltage conversion circuit Semi-polarity capacitor C 12 joins the minus earth of polar capacitor C12 with the+external direct current power supply of 24V and the Vin of power supply chip VR1 end; The end of capacitor C 6, C7, C8 all joins the equal ground connection of the other end with the Vin of power supply chip VR1 end; The GND end ground connection of power supply chip VR1; The end of capacitor C 9, C10 all joins the equal ground connection of the other end with the Vout of power supply chip VR1 end; The positive pole of polar capacitor C11 and the Vout of VR1 end join the minus earth of polar capacitor C11; The Vout end output+15V of power supply chip VR1; The end of capacitor C 1, C2 all joins the equal ground connection of the other end with the+external direct current power supply of 24V and the Vin of power supply chip VR2 end in+the 5V voltage conversion circuit; The GND end ground connection of power supply chip VR2; The end of capacitor C 3, C4, C5 all joins the equal ground connection of the other end with the Vout of power supply chip VR2 end; The Vout end output+5V of power supply chip VR2; The model of described power supply chip VR1 is 78L15, and the model of power supply chip VR2 is 78L05.

Described I/V translation circuit comprises amplifier U1A, resistance R 1, R2, R3, R5, R6, capacitor C 13, C14, C15; 4 pins of amplifier U1A connect+the 15V power supply, 11 pin ground connection, and the end of resistance R 5, R6 all joins with an end of resistance R 3, and the other end all joins with ground; One end of resistance R 3 and an end of capacitor C 14 join, and 3 pins of the other end and U1A, an end of capacitor C 15 join, the equal ground connection of the other end of capacitor C 14 and C15; One end of 2 pins of U1A and an end of resistance R 1, capacitor C 13 joins, and the other end of 1 pin of U1A and the other end of resistance R 1, capacitor C 13 joins, and output voltage V i connects 18 pins of microprocessor chip U4.

Described V/I translation circuit comprises amplifier U1B, U1C, U1D, resistance R 12, R13, R14, R15, R16, R18, R19, R20, R21, R22, R23, R26, R27, capacitor C 29, C30 and triode Q2; The end of one terminating resistor R24 of

resistance R

14,10 pins of another termination amplifier U1C of resistance R 14; One end of resistance R 21 and capacitor C 30 all joins 8 pins of another termination amplifier U1C with 9 pins of amplifier U1C; 8 pins of one termination amplifier U1C of

resistance R

16,5 pins of another termination amplifier U1B; 6 pins of one termination amplifier U1B of resistance R 12, other end ground connection; 6 pins of one termination amplifier U1B of resistance R 13, the emitter of the other end and triode Q2 and an end of resistance R 20 join, the other end ground connection of resistance R 20; The collector of triode Q2 connects+24V; 7 pins of one termination amplifier U1B of resistance R 15, the base stage of another termination triode Q2; 5 pins of one termination amplifier U1B of resistance R 18,14 pins of an end of the other end and resistance R 19, an end of capacitor C 29 and amplifier U1D join, 13 pins of another termination amplifier U1D of the other end of resistance R 19, capacitor C 29; 12 pins of one termination amplifier U1D of resistance R 26, one end of one end of the other end and resistance R 22, an end of resistance R 23, resistance R 27 joins, the emitter of another termination triode Q2 of the other end of resistance R 22, resistance R 23, the electric current of the other end output 4～20mA of resistance R 27,5 pins of connector P1, described amplifier U1A, amplifier U1B, amplifier U1C and amplifier U1D are integrated in the chip piece, and the model of this chip is LM224AD.

Described serial interface circuit comprises capacitor C 18, C19, C20, C21, C23, C24, resistance R 8, R9, R30, R31, plug-in unit JP1 and power level conversion chip U2; 16 pins of power level conversion chip U2 connect+5V, 15 pin ground connection; 1 pin of one termination power level transferring chip U2 of capacitor C 20,3 pins of another termination power level conversion chip U2,4 pins of a termination power level transferring chip U2 of capacitor C 23,5 pins of another termination power level conversion chip U2; The end of capacitor C 18, C19 all joins the equal ground connection of the other end, 2 pins of a termination power level transferring chip U2 of capacitor C 21, other end ground connection, 6 pins of a termination power level transferring chip U2 of capacitor C 24, other end ground connection with+5V; 10 pins of power level conversion chip U2 connect 5 pins of microprocessor chip U4,1 pin of the 8 pin connector JP1 of power level conversion chip U2,3 pins of the 7 pin connector JP1 of power level conversion chip U2,9 pins of power level conversion chip U2 connect 4 pins of microprocessor chip U4; 8 pins of one termination power level transferring chip U2 of

resistance R

8,9 pins of another termination power level conversion chip U2,10 pins of a termination power level transferring chip U2 of

resistance R

9,7 pins of another termination power level conversion chip U2; 8 pins of one termination power level transferring chip U2 of resistance R 30, other end ground connection, 7 pins of a termination power level transferring chip U2 of resistance R 31, other end ground connection; The 2 pin ground connection of plug-in unit JP1; All the other pins of power level conversion chip U2 are all unsettled, and the model of described power level conversion chip U2 is MAX232D.

Described microprocessor module circuit comprises microprocessor chip U4, capacitor C 25, C26, C27, C28, C31, C32, resistance R 25, R17, R24; 28 pins of microprocessor chip U4 connect+5V, 14 pin ground connection; One termination of capacitor C 25+5V, 3 pins of the other end and microprocessor chip U4 and an end of resistance R 17 join, the other end ground connection of resistance R 17; The end of capacitor C 26, C27, C28 all joins the equal ground connection of the other end with 28 pins of microprocessor chip U4; 11 pins of one termination microprocessor chip U4 of resistance R 25, an end of the other end and resistance R 24 and an end of capacitor C 32 join, an end of another termination capacitor C 31 of resistance R 24, the equal ground connection of the other end of capacitor C 31 and capacitor C 32; 2 pins of microprocessor chip U4 connect 2 pins of chip of LCD U3,12 pins of microprocessor chip U4 connect 3 pins of chip of LCD U3,13 pins of microprocessor chip U4 connect 4 pins of middle chip of LCD U3,15 pins of microprocessor chip U4 connect 5 pins of chip of LCD U3,16 pins of microprocessor chip U4 connect 9 pins of chip of LCD U3, the end of the 17 pin connecting resistance R11 of microprocessor chip U4; All the other pins of microprocessor chip U4 are all unsettled, and the model of described microprocessor chip U4 is STC12C5628AD.

Described LCD MODULE circuit comprises chip of LCD U3, capacitor C 22, resistance R 10, R11, triode Q1 and light emitting diode L1, L2, L3, L4; 1 pin and 6 pins of chip of LCD U3 all connect+5V, the 7 pin ground connection of chip of LCD U3,8 pins of a termination chip of LCD U3 of capacitor C 22, other end ground connection; The grounded emitter of triode Q1, the other end of the base stage connecting resistance R11 of triode Q1, the negative electrode of the collector of triode Q1 and light emitting diode L1, L2, L3, L4 joins, the anode of one end of resistance R 10 and light emitting diode L1, L2, L3, L4 joins, another termination+5V, the model of described chip of LCD U3 is NOKIA5110.

Described external interface circuit comprises resistance R 28, R29, R32 and plug-in unit P1; 1 pin of plug-in unit P1 connects+24V, 2 pins of P1 and the equal ground connection of 4 pins, and 3 pins of P1 connect the input current of 4～20mA, and 5 pins of P1 connect the output current of 4～20mA; One termination of resistance R 32+24V, other end ground connection, 3 pins of a termination P1 of resistance R 28, other end ground connection, 5 pins of a termination P1 of resistance R 29, other end ground connection.

The change that this intelligence simulation instrument can simulate the signals such as pressure, temperature and flow is sent, and carries out valve event etc.Compare with existing site technology, following advantage arranged:

1. save the energy and starting material.When reproducing field condition, site intelligent emulation instrument saved sensor measurement equipment, simulate measuring-signal and export to Industrial PC or DCS and replace field simulator, so that in the situation that do not need solution to make accurately industry spot simulation reconstruction, saved industrial chemicals.When realizing topworks's simulation, do not need really to exist the executive components such as motorized valve in the system, only need the control signal input, the smart fields analogue means just can simulate the output of a controlled quentity controlled variable, affect simultaneously the running status of simulation system, simulate a complete industry spot.

2. simulate true to nature, practical.The intelligence simulation instrument can be true to nature the output that simulates some controlled quentity controlled variables in the scene.

3. safe and reliable.The skilled worker during training, because operation not skillfully may cause maloperation, the impact for industry spot when serious will be fatal, and site intelligent emulation instrument is owing to having avoided real scene, this impact can be reduced to minimum, thereby guarantee the safety of training process.

Description of drawings

Fig. 1 is the structural representation of the utility model applicable situation;

Fig. 2 is schematic block circuit diagram of the present utility model;

Fig. 3 is the power module circuitry schematic diagram among Fig. 2;

Fig. 4 is the I/V translation circuit schematic diagram among Fig. 2;

Fig. 5 is the V/I translation circuit schematic diagram among Fig. 2;

Fig. 6 is the serial interface circuit theory diagrams among Fig. 2;

Fig. 7 is the microprocessor module circuit theory diagrams among Fig. 2;

Fig. 8 is the LCD MODULE circuit theory diagrams among Fig. 2;

Fig. 9 is the external interface circuit schematic diagram among Fig. 2.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

As shown in Figure 1, in simulation training system, when the student carries out emulation training, system data at the student station, OTS simulation training system, DCS control system, site intelligent emulation instrument cubicle transmit; Site intelligent emulation instrument realizes the conversion between controlled quentity controlled variable and the standard electric signal, and shows the operation result of simulation training system.

As shown in Figure 2, the intelligence simulation instrument comprises power module circuitry, I/V translation circuit, V/I translation circuit, serial interface circuit, microprocessor module circuit, LCD MODULE circuit and external interface circuit.The I/V translation circuit is connected with microprocessor module circuit I/O mouth signal, the V/I translation circuit is connected with microprocessor module circuit I/O mouth signal, the LCD MODULE circuit is connected with microprocessor module circuit I/O mouth signal, the serial ports of serial interface circuit and microprocessor module circuit joins, the I/V translation circuit is connected with external interface circuit, the V/I translation circuit is connected with external interface circuit, and power module is microprocessor module circuit, LCD MODULE circuit, I/V translation circuit, V/I translation circuit and external interface circuit power supply.I/V translation circuit and V/I translation circuit are realized the mutual conversion between electric current and the voltage.The serial interface circuit is mainly used in the download of program, solves the level match problem when communicating by letter between single-chip microcomputer and the computing machine; External interface circuit is used for the intelligence simulation instrument and is connected with external circuit; LCD MODULE is used for showing the physical quantity that simulated.

As shown in Figure 3, power module comprises+the 15V voltage conversion circuit and+the 5V voltage conversion circuit, + 15V voltage conversion circuit comprises polar capacitor C12, C11, capacitor C 6, C7, C8, C9, C10, power supply chip VR1, and+5V voltage conversion circuit comprises capacitor C 1, C2, C3, C4, C5 and power supply chip VR2; The positive pole of+15V voltage conversion circuit Semi-polarity capacitor C 12 joins the minus earth of polar capacitor C12 with the+external direct current power supply of 24V and the Vin of power supply chip VR1 end; The end of capacitor C 6, C7, C8 all joins the equal ground connection of the other end with the Vin of power supply chip VR1 end; The GND end ground connection of power supply chip VR1; The end of capacitor C 9, C10 all joins the equal ground connection of the other end with the Vout of power supply chip VR1 end; The positive pole of polar capacitor C11 and the Vout of VR1 end join the minus earth of polar capacitor C11; The Vout end output+15V of VR1.The end of capacitor C 1, C2 all joins the equal ground connection of the other end with the+external direct current power supply of 24V and the Vin of power supply chip VR2 end in+the 5V voltage conversion circuit; Power supply chip VR2 GND end ground connection; The end of capacitor C 3, C4, C5 all joins the equal ground connection of the other end with the Vout of power supply chip VR2 end; The Vout end output+5V of VR2.Emulation instrument external interface voltage is+24V, and the different voltage of the need of work of each several part circuit in the whole system, need to be for different Demand Design different power modules.+ 24V direct supply for+15V voltage conversion circuit and+the V/I translation circuit of 5V voltage conversion circuit and current output channels provides power supply; The core of+15V voltage conversion circuit is fixed voltage three end integrated regulated power supply chip 78L15, and its output is as the power supply of the I/V translation circuit of electric current input channel; The core of+5V voltage conversion circuit is fixed voltage three end integrated regulated power supply chip 78L05, and it exports to microprocessor module, NOKIA5110 display module and serial interface circuit supply.Power unit provides power supply for the circuit of whole system, for system's reliably working realizes that circuit function provides safeguard.

As shown in Figure 4, the I/V translation circuit comprises amplifier U1A, resistance R 1, R2, R3, R5, R6, capacitor C 13, C14, C15; 4 pins of amplifier U1A connect+the 15V power supply, 11 pin ground connection, and the end of resistance R 5, R6 all joins with an end of resistance R 3, and the other end all joins with ground; One end of resistance R 3 and an end of capacitor C 14 join, and 3 pins of the other end and U1A and an end of capacitor C 15 join, the equal ground connection of the other end of capacitor C 14 and C15; One end of 2 pins of U1A and resistance R 1 and capacitor C 13 joins, and the other end of 1 pin and resistance R 1 and capacitor C 13 joins, 18 pins of microprocessor chip U4 in the output voltage V i map interlinking 7.Because the standard input signal of simulator outside is the current signal of 4～20mA, the effect of I/V change-over circuit is that the input current with 4～20mA is converted to the voltage signal that single-chip microcomputer can be identified, so that the A/D modular converter of single-chip microcomputer carries out the input signal conversion.The operational amplifier that uses in the circuit design is LM224AD, R5 wherein, and what R6 adopted is that precision resistance is to improve the circuit precision.

As shown in Figure 5, the V/I translation circuit comprises amplifier U1B, U1C, U1D, resistance R 12, R13, R14, R15, R16, R18, R19, R20, R21, R22, R23, R26, R27, capacitor C 29, C30 and triode Q2; 1～5V is the output voltage signal of microprocessor module, an end of resistance R 24 among termination Fig. 7 of

resistance R

14,10 pins of another termination U1C of resistance R 14; One end of resistance R 21 and capacitor C 30 all joins 8 pins of another termination U1C with 9 pins of U1C; 8 pins of one termination U1C of

resistance R

16,5 pins of another termination U1B; 6 pins of one termination U1B of resistance R 12, other end ground connection; 6 pins of one termination U1B of resistance R 13, the emitter of the other end and triode Q2 and an end of resistance R 20 join, the other end ground connection of resistance R 20; The collector of triode Q2 connects+24V; 7 pins of one termination U1B of resistance R 15, the base stage of another termination triode Q2; 5 pins of one termination U1B of resistance R 18, an end of the other end and resistance R 19 and capacitor C 29 and 14 pins of U1D join, 13 pins of another termination U1D of resistance R 19 and capacitor C 29; 12 pins of one termination U1D of resistance R 26, the end of the other end and resistance R 22, R23 and R27 joins, the emitter of another termination triode Q2 of resistance R 22, R23, the electric current of the other end output 4～20mA of resistance R 27,5 pins of plug-in unit P1 in the map interlinking 9.The V/I translation circuit mainly is to use dividing potential drop and negative feedback that the voltage signal of 1～5V of the PWM module output of single-chip microcomputer is converted to 4～20mA current signal, to satisfy the process industry standard to the requirement of simulator output signal.

As shown in Figure 6, the serial interface circuit comprises capacitor C 18, C19, C20, C21, C23, C24, resistance R 8, R9, R30, R31, plug-in unit JP1 and power level conversion chip U2; 16 pins of U2 connect+5V, 15 pin ground connection.1 pin of one termination U2 of capacitor C 20,3 pins of another termination U2,4 pins of a termination U2 of capacitor C 23,5 pins of another termination U2; The end of capacitor C 18, C19 all joins the equal ground connection of the other end, 2 pins of a termination U2 of capacitor C 21, other end ground connection, 6 pins of a termination U2 of capacitor C 24, other end ground connection with+5V; 10 pins of U2 connect 5 pins of U4,1 pin of the 8 pin connector JP1 of U2, and 3 pins of the 7 pin connector JP1 of U2,9 pins of U2 connect 4 pins of U4; 8 pins of one termination U2 of

resistance R

8,9 pins of another termination U2,10 pins of a termination U2 of

resistance R

9,7 pins of another termination U2; 8 pins of one termination U2 of resistance R 30, other end ground connection, 7 pins of a termination U2 of resistance R 31, other end ground connection; The 2 pin ground connection of plug-in unit JP1; All the other pins of U2 are all unsettled.When computing machine used USB to turn serial ports, at this time the output of TTL can be directly and single chip communication.Zero resistance R8, R9 are the compatibility of considering device, just weld when single-chip microcomputer is directly communicated by letter with Transistor-Transistor Logic level.In design, single-chip microcomputer uses serial ports to carry out program and downloads, and STC12C5628AD also allows the user to use serial ports as communication interface, can carry out debugging and the functional verification of program by these.Simultaneity factor uses serial ports as later stage program function upgrading and diagnostics interface.Computer communication system is used the RS232 level because the serial ports on the single-chip microcomputer uses Transistor-Transistor Logic level, so both can not directly communicate, and need to carry out level conversion, therefore use MAX232D to carry out the level shifting circuit design.

As shown in Figure 7, the microprocessor module circuit comprises microprocessor chip U4, capacitor C 25, C26, C27, C28, C31, C32, resistance R 25, R17, R24; 28 pins of microprocessor chip U4 connect+5V, 14 pin ground connection.In the reset circuit, one termination of capacitor C 25+5V, 3 pins of the other end and U4 and an end of resistance R 17 join, the other end ground connection of resistance R 17; The end of capacitor C 26, C27, C28 all joins the equal ground connection of the other end with 28 pins of U4; 11 pins of one termination U4 of resistance R 25, an end of the other end and resistance R 24 and an end of capacitor C 32 join, an end of another termination capacitor C 31 of resistance R 24, the equal ground connection of the other end of capacitor C 31 and capacitor C 32; 2 pins of U3 in the 2 pin map interlinkings 8 of U4,3 pins of U3 in the 12 pin map interlinkings 8 of U4,4 pins of U3 in the 13 pin map interlinkings 8 of U4,5 pins of U3 in the 15 pin map interlinkings 8 of U4,9 pins of U3 in the 16 pin map interlinkings 8 of U4, an end of resistance R 11 in the 17 pin map interlinkings 8 of U4; All the other pins of U4 are all unsettled.Microprocessor module has been built respectively reset circuit, clock circuit take the semi-conductive STC12C5628AD of macrocrystalline as core in its periphery.And the power supply pin to processor has carried out moving back the lotus root processing.The STC12C5628AD clock source can be selected external clock reference or inner R/C oscillator, is Cost reduction, reduces design complexity, and the STC12C5628AD clock circuit is selected its inner R/C oscillator in design.The serial ports of microprocessor is connected with MAX232D; The FPDP of microprocessor is connected with the NOKIA5110 LCD MODULE; The processor power supply end is connected with+5V voltage conversion circuit.

As shown in Figure 8, the LCD MODULE circuit comprises chip of LCD U3, capacitor C 22, resistance R 10, R11, triode Q1 and light emitting diode L1, L2, L3, L4; 1 pin and 6 pins of U3 all connect+5V, the 7 pin ground connection of U3,8 pins of a termination U3 of capacitor C 22, other end ground connection; In the LCD backlight circuit, the grounded emitter of triode Q1, the other end of the base stage connecting resistance R11 of Q1, the negative electrode of the collector of Q1 and light emitting diode L1, L2, L3, L4 joins, the anode of one end of resistance R 10 and light emitting diode L1, L2, L3, L4 joins, another termination+5V.When not using LCD, can also turn off LCD by triode Q1 backlight, energy-conservation to realize.LCD MODULE adopts NOKIA5110LCD, and NOKIA5110LCD uses the communication of SPI signal, and single-chip microcomputer uses I/O interface simulation SPI clock signal in design, communicates.In addition, NOKIA5110 liquid crystal need of work configuration backlight circuit.When not using LCD, can also turn off LCD with the mistake triode backlight, energy-conservation to realize.

As shown in Figure 9, external interface circuit comprises resistance R 28, R29, R32 and plug-in unit P1; 1 pin of plug-in unit P1 connects+24V, 2 pins of P1 and the equal ground connection of 4 pins, and 3 pins of P1 connect the input current of 4～20mA, and 5 pins of P1 connect the output current of 4～20mA; One termination of resistance R 32+24V, other end ground connection, 3 pins of a termination P1 of resistance R 28, other end ground connection, 5 pins of the termination P1 of resistance R29, other end ground connection.External interface adopts five line interfaces, and three lines provide+the 24V power supply, comprising two ground wires of a power lead.One is the current signal input line in other two lines, and also having one is the current signal output line.

The course of work of the present utility model is:

The interface voltage of outside+24V passes through+conversion of 5V voltage conversion circuit, for microprocessor, LCD MODULE and serial interface circuit provide power supply.The interface voltage of outside+24V is by the conversion of+15V voltage conversion circuit, and as the power supply of I/V change-over circuit, outside+24V is directly as the power supply of V/I change-over circuit.

When the current controling signal of the given 4～20mA of DCS, the intelligence simulation instrument can be converted into 1～+ voltage signal of 5V, then the A/D modular converter by single-chip microcomputer carries out control signal identification, make afterwards corresponding control, again the PWM module by single-chip microcomputer add low-pass filtering output 1～+ analog signal output of 5V, then by the circuit conversion, the standard current signal that the analogue measurement signal is converted to 4～20mA feeds back to upper strata DCS.Meanwhile display setting parameter and process variable numerical value in the NOKIA5110LCD Liquid Crystal Module, process variable numerical value are the physical quantitys (such as temperature, pressure, flow etc.) that draws by corresponding algorithm computing in the microprocessor.When downloading different programmed algorithms in the microprocessor, the demonstration result of LCD MODULE will change along with the difference of algorithm.

Therefore the shell model of the differential pressure transmitter in the shell use procedure control instrument of intelligence simulation instrument can make the intelligence simulation instrument be applicable to the pipeline of standard, with the simulated technological process industry spot instrument of trying one's best, forms the training and teaching system.

Claims

1. An intelligent simulation instrument, comprising a power module circuit, an I/V conversion circuit, a V/I conversion circuit, a serial port interface circuit, a microprocessor module circuit, a liquid crystal display module circuit and an external interface circuit, is characterized in that:

The I/V conversion circuit is connected to the I/O port signal of the microprocessor module circuit, the V/I conversion circuit is connected to the I/O port signal of the microprocessor module circuit, and the liquid crystal display module circuit is connected to the I/O port of the microprocessor module circuit Signal connection, the serial port interface circuit is connected with the serial port of the microprocessor module circuit, the I/V conversion circuit is connected with the external interface circuit, the V/I conversion circuit is connected with the external interface circuit, and the power supply module circuit is a microprocessor module circuit, I Power supply for /V conversion circuit, V/I conversion circuit, liquid crystal display module circuit and external interface circuit;

The power module circuit includes a +15V voltage conversion circuit and a +5V voltage conversion circuit, and the +15V voltage conversion circuit includes polar capacitors C12, C11, capacitors C6, C7, C8, C9, C10, power chip VR1, and +5V voltage conversion The circuit includes capacitors C1, C2, C3, C4, C5 and power chip VR2; the positive pole of the polar capacitor C12 in the +15V voltage conversion circuit is connected to the +24V external DC power supply and the Vin terminal of the power chip VR1, and the polar capacitor C12 The negative pole of the capacitors C6, C7, and C8 are all connected to the Vin terminal of the power chip VR1, and the other ends are grounded; the GND terminal of the power chip VR1 is grounded; one end of the capacitors C9 and C10 are connected to the Vout terminal of the power chip VR1 connected, and the other end is grounded; the positive pole of the polar capacitor C11 is connected to the Vout terminal of VR1, and the negative pole of the polar capacitor C11 is grounded; the Vout terminal of the power supply chip VR1 outputs +15V; the capacitors C1 and C2 in the +5V voltage conversion circuit One end of the capacitors C3, C4, and C5 are all connected to the Vout end of the power chip VR2 connected, and the other end is grounded; the Vout terminal of the power chip VR2 outputs +5V; the model of the power chip VR1 is 78L15, and the model of the power chip VR2 is 78L05;

The I/V conversion circuit includes amplifier U1A, resistors R1, R2, R3, R5, R6, capacitors C13, C14, C15; 4 pins of amplifier U1A are connected to +15V power supply, 11 pins are grounded, and resistors R5, R6 One end is connected to one end of resistor R3, and the other end is connected to ground; one end of resistor R3 is connected to one end of capacitor C14, the other end is connected to pin 3 of U1A, and one end of capacitor C15. Capacitors C14 and C15 The other ends of both are grounded; the 2 pins of U1A are connected to one end of the resistor R1 and one end of the capacitor C13, the 1 pin of U1A is connected to the other end of the resistor R1 and the other end of the capacitor C13, and the output voltage Vi is connected to the microprocessor 18 pins of the device chip U4;

The V/I conversion circuit includes amplifiers U1B, U1C, U1D, resistors R12, R13, R14, R15, R16, R18, R19, R20, R21, R22, R23, R26, R27, capacitors C29, C30 and transistor Q2; One end of resistor R14 is connected to one end of resistor R24, and the other end of resistor R14 is connected to pin 10 of amplifier U1C; one end of resistor R21 and capacitor C30 are both connected to pin 9 of amplifier U1C, and the other end is connected to pin 8 of amplifier U1C ; One end of the resistor R16 is connected to the 8-pin of the amplifier U1C, and the other end is connected to the 5-pin of the amplifier U1B; one end of the resistor R12 is connected to the 6-pin of the amplifier U1B, and the other end is grounded; one end of the resistor R13 is connected to the 6-pin of the amplifier U1B , the other end is connected to the emitter of the transistor Q2 and one end of the resistor R20, the other end of the resistor R20 is grounded; the collector of the transistor Q2 is connected to +24V; one end of the resistor R15 is connected to pin 7 of the amplifier U1B, and the other end is connected to the transistor Q2 One end of resistor R18 is connected to pin 5 of amplifier U1B, the other end is connected to one end of resistor R19, one end of capacitor C29 and pin 14 of amplifier U1D, the other end of resistor R19 is connected to the other end of capacitor C29 Pin 13 of the amplifier U1D; one end of the resistor R26 is connected to the pin 12 of the amplifier U1D, the other end is connected to one end of the resistor R22, one end of the resistor R23, and one end of the resistor R27; the other end of the resistor R22 is connected to the other end of the resistor R23 Connected to the emitter of the triode Q2, the other end of the resistor R27 outputs a current of 4-20mA, the 5-pin of the connector P1, the amplifier U1A, the amplifier U1B, the amplifier U1C and the amplifier U1D are integrated in one chip. The model is LM224AD;

The serial port interface circuit includes capacitors C18, C19, C20, C21, C23, C24, resistors R8, R9, R30, R31, plug-in JP1 and power level conversion chip U2; the 16 pins of power level conversion chip U2 are connected to + 5V, pin 15 is grounded; one end of capacitor C20 is connected to pin 1 of power level conversion chip U2, the other end is connected to pin 3 of power level conversion chip U2, and one end of capacitor C23 is connected to pin 4 of power level conversion chip U2 pin, the other end is connected to pin 5 of the power level conversion chip U2; one end of capacitors C18 and C19 are connected to +5V, the other end is grounded, and one end of capacitor C21 is connected to pin 2 of the power level conversion chip U2 , the other end is grounded, one end of the capacitor C24 is connected to the 6-pin of the power level conversion chip U2, and the other end is grounded; the 10-pin of the power level conversion chip U2 is connected to the 5-pin of the microprocessor chip U4, and the power level conversion Pin 1 of the 8-pin connector JP1 of the chip U2, pin 3 of the 7-pin connector JP1 of the power level conversion chip U2, and 9 pins of the power level conversion chip U2 are connected to 4 pins of the microprocessor chip U4 pin; one end of resistor R8 is connected to pin 8 of power level conversion chip U2, the other end is connected to pin 9 of power level conversion chip U2, one end of resistor R9 is connected to pin 10 of power level conversion chip U2, and the other end is connected to pin 9 of power level conversion chip U2. One end is connected to pin 7 of the power level conversion chip U2; one end of the resistor R30 is connected to the 8 pin of the power level conversion chip U2, the other end is grounded, one end of the resistor R31 is connected to the 7 pin of the power level conversion chip U2, and the other One end is grounded; the 2 pins of the plug-in JP1 are grounded; the remaining pins of the power level conversion chip U2 are suspended, and the model of the power level conversion chip U2 is MAX232D;

Described microprocessor module circuit comprises microprocessor chip U4, electric capacity C25, C26, C27, C28, C31, C32, resistance R25, R17, R24; 28 pins of microprocessor chip U4 connect +5V, 14 pins Grounding; one end of capacitor C25 is connected to +5V, the other end is connected to pin 3 of the microprocessor chip U4 and one end of resistor R17, and the other end of resistor R17 is grounded; one end of capacitors C26, C27, and C28 are all connected to the microprocessor The 28 pins of the chip U4 are connected, and the other end is grounded; one end of the resistor R25 is connected to the 11 pin of the microprocessor chip U4, the other end is connected to one end of the resistor R24 and one end of the capacitor C32, and the other end of the resistor R24 is connected to One end of the capacitor C31, the other end of the capacitor C31 and the capacitor C32 are grounded; the 2 pins of the microprocessor chip U4 are connected to the 2 pins of the liquid crystal display chip U3, and the 12 pins of the microprocessor chip U4 are connected to the liquid crystal display chip U3 3 pins, the 13 pins of the microprocessor chip U4 are connected to the 4 pins of the liquid crystal display chip U3, the 15 pins of the microprocessor chip U4 are connected to the 5 pins of the liquid crystal display chip U3, and the 16 pins of the microprocessor chip U4 The pins are connected to the 9 pins of the liquid crystal display chip U3, and the 17 pins of the microprocessor chip U4 are connected to one end of the resistor R11; the remaining pins of the microprocessor chip U4 are suspended, and the model of the microprocessor chip U4 is STC12C5628AD;

The liquid crystal display module circuit includes a liquid crystal display chip U3, a capacitor C22, resistors R10, R11, a transistor Q1, and light-emitting diodes L1, L2, L3, and L4; pins 1 and 6 of the liquid crystal display chip U3 are all connected to + 5V, the pin 7 of the liquid crystal display chip U3 is grounded, one end of the capacitor C22 is connected to the pin 8 of the liquid crystal display chip U3, and the other end is grounded; the emitter of the triode Q1 is grounded, the base of the triode Q1 is connected to the other end of the resistor R11, and the triode The collector of Q1 is connected to the cathodes of the light-emitting diodes L1, L2, L3, and L4, one end of the resistor R10 is connected to the anodes of the light-emitting diodes L1, L2, L3, and L4, and the other end is connected to +5V. The model of the LCD chip U3 is NOKIA5110;

The external interface circuit includes resistors R28, R29, R32 and plug-in P1; pin 1 of plug-in P1 is connected to +24V, pin 2 and pin 4 of P1 are grounded, pin 3 of P1 is connected to an input current of 4-20mA , Pin 5 of P1 is connected to an output current of 4-20mA; one end of resistor R32 is connected to +24V, the other end is grounded, one end of resistor R28 is connected to pin 3 of P1, the other end is grounded, one end of resistor R29 is connected to pin 5 of P1 pin, and the other end is grounded.