CN2672625Y - Multifunction flow integrating regulating instrument - Google Patents

Abstract

The utility model relates to a multifunctional flow-rate reckoning accommodometer. A circuit part comprises a signal acquisition unit, a data processing unit and an output unit. The data processing unit is electrically isolated from the signal acquisition unit and the output unit through photocouplers. The output unit III comprises a flow-rate transmitting module finishing the flow-rate transmitting, a flow rate regulation module outputting flow rate regulatory signals, a flow-rate alarm module providing flow-rate dual limit alarm signals, a communication module finishing the communication function and a digital display module displaying parameters. The utility model is characterized in that the signal acquisition unit comprises an analog signal conditioning circuit, an analog switching circuit, an analogue-digital conversion circuit and a frequency signal conditioning circuit. The signal acquisition unit inputs the received temperature, pressure or flow rate signals to the analog switching circuit through the analog signal conditioning circuit. The analogue-digital conversion circuit is controlled by a microcontroller to orderly switch the analog switching circuit, to send the digital signals converted from analog signals into the data processing unit. Frequency flow rate signals are through the frequency signal conditioning circuit converted into standard square signals which are sent into the data processing unit.

Description

A kind of multi-functional flow accumulation adjusting apparatus

One, technical field

The utility model relates to a kind of Multifunctional Flow Totalizer, is meant especially a kind ofly to have that flow PI regulates and the temperature and pressure automatic compensation function, is applicable to liquid, steam, rock gas and the general secondary instrument of the flow accumulation of gas etc.

Two, background technology

The flow integrator kind is a lot of in the market, because the restriction of hardware circuit, general flow integrator does not possess the isolation of input signal and single-chip microcomputer, multiple temperature and pressure compensation, flow PI adjusting, real-time clock and timing meter reading function simultaneously.

Three, summary of the invention

The purpose of this utility model provides a kind of multi-functional flow accumulation adjusting apparatus of isolated form that possesses multiple signal type input, multiple flow temperature and pressure compensation mode and have functions such as flow PI adjusting.

A kind of multi-functional flow accumulation adjusting apparatus, circuit part comprises signal gathering unit I, data processing unit II, and output unit III; Carry out electrical isolation by optocoupler between data processing unit II and signal gathering unit I, the output unit III; Output unit III comprises that finishing flow becomes the flow transmitting module j that send, the flow regulation module k of delivery rate conditioning signal, flow alarm module l, the communication module m that finishes communication function that the two limit of flow alerting signal is provided and the digital display module i of display parameter; It is characterized in that: signal gathering unit I comprises analog signal conditioner circuit a, analog switching circuit b, analog to digital conversion circuit c and frequency signal modulate circuit d; Signal gathering unit I is with temperature, pressure or the flow signal accepted, behind analog signal conditioner circuit a, enter analog switching circuit b, analog to digital conversion circuit c orderly switching analoging switch circuit b under the control of microcontroller circuit e sends into data processing unit II after each road analog signal conversion become digital signal; Signal gathering unit I then sends into data processing unit II with the frequency flow signal of accepting after frequency signal modulate circuit d converts the standard square-wave signal to;

Data processing unit II mainly comprises microcontroller circuit e, resetting with power-fail detection circuit f, depositing the program storage expanded circuit g of program and the regularly real time clock circuit h of square-wave signal is provided of microcontroller circuit e reset signal and detection of power loss signal is provided;

Analog switching circuit b mainly comprises analog switch U103; Analog to digital conversion circuit c mainly comprises analog to digital converter U104;

Signal conditioning circuit a comprises by calculating amplifier U102, resistance R 101～R110, the signal sampling circuit that capacitor C 101～C103, C108 form, temperature signal through capacitor C 101, resistance R 104 and capacitor C 102 filtering, is amplified into analog switch U103 through operational amplifier U102 respectively again; Pressure signal again through resistance R 105, R108 dividing potential drop, inserts analog switch U103 earlier through sample resistance R102 then after C103 filtering; Flow signal again through resistance R 106, R109 dividing potential drop, inserts analog switch U103 earlier through sample resistance R103 then after C108 filtering; Signal conditioning circuit a also comprises constant current source chip U101, produces positive and negative two-way constant current source and inserts thermal resistance respectively the other way around; Signal conditioning circuit a also comprises the cold junction compensation circuit of being made up of temperature sensor U105, resistance R 114～R116 dividing potential drop, capacitor C 113～C115, is used for cold junction compensation;

Frequency signal modulate circuit d mainly comprises timer U202, diode D201, D202, and resistance R 201, R208 capacitor C 201 is shaped to the standard square-wave signal after 27 pin of microcontroller U302 are sent in light-coupled isolation with frequency signal; The frequency signal modulate circuit also comprises by operational amplifier U201A, U201B, and capacitor C 202～C205, resistance R 202～R207 form string ripple signal processing circuit, will send into microcontroller U302 again after timer U202 shaping after the string ripple signal Processing.

Microcontroller circuit e mainly comprises microcontroller U302 among the data processing unit II, reset and power-fail detection circuit f mainly comprises microprocessor monitors device U303, program storage expanded circuit g mainly comprises address latch U304, code translator U306, program storage U305 and Sheffer stroke gate U307, U308; Real time clock circuit h mainly comprises real-time clock U301; The PB mouth of microcontroller U302 links to each other with address latch U304, code translator U306; 15 pin of address decoder U306 link to each other with 13 pin of real-time clock U301; 11 pin of address decoder U306 link to each other with 4,5 pin of Sheffer stroke gate U308; 23 pin of real-time clock U301 link to each other with 33 pin of microcontroller U302; 8 pin of microprocessor monitors device U303 provide power-on reset signal to link to each other with 17 pin of microcontroller U302, and 5 pin of U303 also provide low voltage detection to link to each other with 48 pin with 18 pin of microprocessor U302.

Compared with the prior art the utility model has highly versatile, characteristics such as multiple functional, easy to use.

The utility model also has flow PI adjusting, pressure compensation automatically, temperature self-compensation, temperature, pressure compensation simultaneously, density compensation, nonlinear compensation, real-time clock and timing meter reading function.

Four, description of drawings

Accompanying drawing 1 is a theory diagram of the present utility model

Accompanying drawing 2 is signal gathering unit circuit part electrical principle synoptic diagram in the accompanying drawing 1

Accompanying drawing 3 signal gathering unit channel frequency signal conditioning circuits are data processing unit electrical principle synoptic diagram

Accompanying drawing 4 is data processing unit circuit electrical principle synoptic diagram in the accompanying drawing 1

Five, specific embodiments

Circuit part comprises signal gathering unit I in the accompanying drawing 1, data processing unit II, and output unit III; Carry out electrical isolation by optocoupler between data processing unit II and signal gathering unit I, the output unit III; Signal gathering unit I comprises analog signal conditioner circuit a, analog switching circuit b, analog to digital conversion circuit c and frequency signal modulate circuit d; Signal gathering unit is with temperature signal Tin, the pressure signal P in or the flow signal Qin that accept, behind analog signal conditioner circuit a, enter analog switching circuit b, analog to digital conversion circuit c orderly switching analoging switch circuit b under the control of microcontroller circuit e sends into data processing unit II after each road analog signal conversion become digital signal; Frequency flow signal fin then sends into data processing unit II after frequency signal modulate circuit d converts the standard square-wave signal to; Data processing unit II mainly comprises microcontroller circuit e, resetting with power-fail detection circuit f, depositing the program storage expanded circuit g of program and the regularly real time clock circuit h of square-wave signal is provided of microcontroller circuit e reset signal and detection of power loss signal is provided; Output unit III comprises that finishing flow becomes the flow transmitting module j that send, the flow regulation module k of delivery rate conditioning signal, flow alarm module l, the communication module m that finishes communication function that the two limit of flow alerting signal is provided and the digital display module i of display parameter; Data processing unit by optocoupler respectively Control Flow become and to send output module j, flow regulation output module k, the flow alarm output module l and the output module m that communicate by letter, result of calculation to send digital display part i demonstration.

Constant current source U101 produces positive and negative two-way constant current source in the accompanying drawing 2, exciting current as thermal resistance temperature sensor, if temperature signal Tin thermal resistance signal, signal is amplified into 13 pin of analog switch U103 more respectively through capacitor C 101, resistance R 104 and capacitor C 102 filtering through operational amplifier U102; If temperature signal thermocouple signal, signal through filtering, are amplified into 13 pin of analog switch U103 again through amplifier U102; The output voltage of temperature sensor U105 enters 15 pin of analog switch U103 after resistance R 115, R116 dividing potential drop, capacitor C 114 filtering, this signal is used for cold junction compensation, and resistance R 101 is used for the burn out detection of thermal resistance, thermopair; Pressure signal P in, through resistance R 102 sampling, resistance R 105, R108 dividing potential drop enter 14 pin of analog switch U103 after capacitor C 103 filtering; Flow signal Qin, through resistance R 103 samplings, resistance R 106, R109 dividing potential drop enter analog switch U103 after capacitor C 108 filtering; Analog to digital converter U104 switching analoging switch U103 in an orderly manner under the control of microcontroller U302, temperature, pressure, flow signal are sampled respectively, carry out data transmission by spi bus and microcontroller U302 after converting digital signal to, 1 pin of analog to digital converter U104 can directly link to each other with 2 pin of trigger U309 or link to each other behind circuit through light, and 4 pin of U104,11 pin, 2 pin and 3 pin then can be distinguished and directly link to each other with 24 pin, 34 pin, 23 pin and 22 pin of U302 or continuous behind circuit through light.Light can be made up of impact damper and optocoupler every circuit.

Accompanying drawing 3 medium frequency signal fin are earlier through resistance R 201, capacitor C 201 filtering, again behind diode D201, D202 amplitude limit, the treatment circuit that can directly enter timer U202 shaping or constitute via amplifier U201 earlier, be shaped to the standard square-wave signal through timer U202 again, enter 27 pin of the U302 of data processing unit through optocoupler.

Accompanying drawing 4 is that microcontroller U302, external program memory 305 and real-time clock 301 etc. in the data processing unit have been done further explanation.The PB mouth of microcontroller U302 links to each other with address latch U304, code translator U306, and wherein 42 of U302,41,40,36,35,37 pin link to each other with 1,2,3,4,5,6 pin of code translator U306 respectively; The PC mouth of U302 then links to each other with real-time clock U301, program storage U305 trigger U309 respectively.5 pin of code translator U306 link to each other with 1,2 pin of Sheffer stroke gate U307, and 15 pin of U306 link to each other with 13 pin of real-time clock 301, and 11 pin of U306 then link to each other with 4,5 pin of Sheffer stroke gate U308; 3,11 pin of Sheffer stroke gate 307 link to each other with 20,22 pin of U305 respectively; 23 pin of real-time clock U301 provide regularly, and square-wave signal links to each other with 33 pin of U302; The OC door that 8 pin of microprocessor monitors device U303 provide power-on reset signal to pass through resistance R 305, R306, triode T301 composition links to each other with 17 pin of microcontroller U302, and 5 pin of U303 then link to each other with 48 pin with 18 pin of U302 respectively; 5,6 pin of trigger U309 link to each other with display part i respectively, and 15,16,19 pin of U309 send output module j, flow regulation output module k, flow alarm output module l and communication output module m to link to each other by optocoupler and flow change respectively.

Claims (2)

1, a kind of multi-functional flow accumulation adjusting apparatus, circuit part comprises signal gathering unit (I), data processing unit (II), and output unit (III); Carry out electrical isolation by optocoupler between data processing unit (II) and signal gathering unit (I), the output unit (III); Output unit III comprises flow regulation module (k), the flow alarm module (l) that the two limit of flow alerting signal is provided finishing flow and become the flow transmitting module (j) send, delivery rate conditioning signal, finishes the communication module (m) of communication function and the digital display module (i) of display parameter; It is characterized in that: signal gathering unit (I) comprises analog signal conditioner circuit (a), analog switching circuit (b), analog to digital conversion circuit (c) and frequency signal modulate circuit (d); Signal gathering unit (I) is with temperature, pressure or the flow signal accepted, behind analog signal conditioner circuit (a), enter analog switching circuit (b), analog to digital conversion circuit (c) orderly switching analoging switch circuit (b) under the control of microcontroller circuit (e) is sent into data processing unit (II) after each road analog signal conversion become digital signal; Signal gathering unit (I) frequency flow signal is then sent into data processing unit (II) after frequency signal modulate circuit (d) converts the standard square-wave signal to;

Data processing unit (II) mainly comprises microcontroller circuit (e), resetting with power-fail detection circuit (f), depositing the program storage expanded circuit (g) of program and the regularly real time clock circuit (h) of square-wave signal is provided of microcontroller circuit (e) reset signal and detection of power loss signal is provided;

Analog switching circuit (b) mainly comprises analog switch U103; Analog to digital conversion circuit (c) mainly comprises analog to digital converter U104;

Signal conditioning circuit (a) comprises by calculating amplifier U102, resistance R 101～R110, the signal sampling circuit that capacitor C 101～C103, C108 form, temperature signal through capacitor C 101, resistance R 104 and capacitor C 102 filtering, is amplified into analog switch U103 through operational amplifier U102 respectively again; Pressure signal again through resistance R 105, R108 dividing potential drop, inserts analog switch U103 earlier through sample resistance R102 then after C103 filtering; Flow signal again through resistance R 106, R109 dividing potential drop, inserts analog switch U103 earlier through sample resistance R103 then after C108 filtering; Signal conditioning circuit (a) also comprises constant current source chip U101, produces positive and negative two-way constant current source and inserts thermal resistance respectively the other way around; Signal conditioning circuit (a) also comprises the cold junction compensation circuit of being made up of temperature sensor U105, resistance R 114～R116 dividing potential drop, capacitor C 113～C115, is used for cold junction compensation;

Frequency signal modulate circuit (d) mainly comprises fortune timer U202, diode D201, D202, and resistance R 201, R208 capacitor C 201 is shaped to the standard square-wave signal after 27 pin of microcontroller U302 are sent in light-coupled isolation with frequency signal; Frequency signal modulate circuit (d) also comprises by timer U202A, U202B, and capacitor C 202～C205, resistance R 202～R207 form string ripple signal processing circuit, will send into microcontroller U302 again after timer U202 shaping after the string ripple signal Processing.

2, multi-functional flow accumulation adjusting apparatus according to claim 1, it is characterized by the middle microcontroller (e) of data processing unit (II) and mainly comprise microcontroller U302, reset with power-fail detection circuit (f) mainly comprise microprocessor monitors device U303, program storage expanded circuit (g) mainly comprises address latch U304, code translator U306, program storage U305 and Sheffer stroke gate U307, U308; Real time clock circuit (h) mainly comprises real-time clock U301; The PB mouth of microcontroller U302 links to each other with address latch U304, code translator U306; 15 pin of address decoder U306 link to each other with 13 pin of real-time clock U301; 11 pin of address decoder U306 link to each other with 4,5 pin of Sheffer stroke gate U308; 23 pin of real-time clock U301 link to each other with 33 pin of microcontroller U302; 8 pin of microprocessor monitors device U303 provide power-on reset signal to link to each other with 17 pin of microcontroller U302, and 5 pin of U303 also provide low voltage detection to link to each other with 48 pin with 18 pin of microprocessor U302.

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