CN110146297A - Sensor power supply and data acquisition circuit, gas turbo-generator set - Google Patents
Sensor power supply and data acquisition circuit, gas turbo-generator set Download PDFInfo
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- CN110146297A CN110146297A CN201910358330.0A CN201910358330A CN110146297A CN 110146297 A CN110146297 A CN 110146297A CN 201910358330 A CN201910358330 A CN 201910358330A CN 110146297 A CN110146297 A CN 110146297A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/461—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using an operational amplifier as final control device
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- Radar, Positioning & Navigation (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Turbines (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The invention discloses a kind of power supply of sensor and data acquisition circuit and gas turbo-generator sets.Sensor of the invention power supply and data acquisition circuit and gas turbo-generator set, by the way that constant current source module is arranged, selective acquisition module and signal amplification circuit, wherein constant current source module is powered according to the control signal that the controller of gas turbo-generator set issues to corresponding sensor, the output signal for the corresponding sensor of control signal acquisition that selective acquisition module is issued according to the controller of gas turbo-generator set, the enlargement ratio of the output signal for the control signal setting respective sensor that signal amplification circuit is issued according to the controller of gas turbo-generator set, to which the power supply circuit of multiple sensors and signal acquisition circuit is integrally disposed, not only circuit structure is simple, what is used is all electronic device relatively conventional in the market, production cost is low, and reduce engine wiring, alleviate engine weight, it saves Space.
Description
Technical field
The present invention relates to gas turbo-generator set signal testing technical fields, particularly, are related to a kind of sensor power supply
And data acquisition circuit, in addition, further relate to it is a kind of using the sensor power supply and data acquisition circuit gas turbine generating
Unit.
Background technique
Gas turbo-generator set needs to acquire every operating parameter of engine at work, it is therefore desirable to using more
Sensor every operating parameter of engine is acquired, and it also requires powering to each sensor.Traditional side
Formula is individually powered to each sensor, independent data acquisition and processing (DAP) circuit is arranged to the output signal of sensor, in this way
Engine line complexity, the easy error of wiring are caused, increases engine weight, and occupy larger space.
Summary of the invention
It is existing to solve the present invention provides a kind of power supply of sensor and data acquisition circuit, gas turbo-generator set
Gas turbo-generator set existing for engine line is complicated, wiring is easy that error, preponderance, take up space excessive skill
Art problem.
According to an aspect of the present invention, a kind of power supply of sensor and data acquisition circuit are provided, for gas turbine
Multiple sensors of generating set power and acquire the output signal of multiple sensors, including the constant current for powering to sensor
Source module, the selective acquisition module of output signal for selectively acquiring sensor and for the output letter to sensor
Number amplify the signal amplification circuit of processing；
The constant current source module is connect with multiple sensors, it is described selectivity acquisition module respectively with multiple sensors and letter
The connection of number amplifying circuit, the constant current source module, selective acquisition module and signal amplification circuit are also and gas turbine generating
The controller of unit connects, and the signal amplification circuit is also used to connect with signal analysis device, and the constant current source module is also used
It powers in the control signal issued according to the controller of gas turbo-generator set to corresponding sensor, the selectivity acquisition
The output letter for the corresponding sensor of control signal acquisition that module is also used to be issued according to the controller of gas turbo-generator set
Number, the control signal setting that the signal amplification circuit is also used to be issued according to the controller of gas turbo-generator set is corresponding to be passed
The enlargement ratio of the output signal of sensor.
Further, the constant current source module includes voltage-stablizer N1, operational amplifier N2, field-effect tube V1, analog switch
D1, potentiometer RP1, resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2, capacitor C3, capacitor C4 and capacitor C5；
The voltage-stablizer N1 is connected to power supply, and the first end of capacitor C1 is connect with No. 7 pins of voltage-stablizer N1, capacitor C1's
Second end is connect with No. 6 pins of voltage-stablizer N1, No. 1 pin of voltage-stablizer N1 respectively with the first end of resistance R1 and resistance R3
First end connection, the second end of resistance R1 are connect with the first end of potentiometer RP1, and the second end of potentiometer RP1 is imitated with field respectively
Should No. 3 pins of pipe V1 connected with the third end of potentiometer RP1, the second end of resistance R3 respectively with the first end and fortune of resistance R2
Calculate the inverting input terminal connection of amplifier N2, the second end ground connection of resistance R2, the first end of capacitor C2 and the first end of resistance R3
Connection, the second end ground connection of capacitor C2, the non-inverting input terminal of operational amplifier N2 are connect with No. 3 pins of field-effect tube V1, electricity
Hold the first end ground connection of C3, the second end of capacitor C3 is connect with No. 4 pins of operational amplifier N2, the first end and fortune of capacitor C4
No. 1 pin connection of amplifier N2 is calculated, the second end of capacitor C4 is connect with No. 8 pins of operational amplifier N2, operational amplifier
The output end of N2 is connect with No. 4 pins of field-effect tube V1, and No. 2 pins of field-effect tube V1 are connect with analog switch D1, simulation
Switch D1 is connect with the controller of gas turbo-generator set and multiple sensors respectively, the first end and field-effect tube of capacitor C5
No. 3 pins of V1 connect, and the second end of capacitor C5 is connect with No. 2 pins of field-effect tube V1.
Further, the sensor power supply and data acquisition circuit further include carrying out for the output signal to sensor
Clipping, filtering processing signal pre-processing module, the signal pre-processing module respectively with multiple sensors and selectivity acquire
Module connection；
The signal pre-processing module includes multiple current-limiting resistances, and the selectivity acquisition module connect every with sensor
The current-limiting resistance is provided on route；
The signal pre-processing module further include resistance R8, resistance R9, resistance R10, resistance R11, capacitor C6, capacitor C7,
Capacitor C8, capacitor C9, the first end of the resistance R8 and the first end of resistance R10 are connect with sensor, and the second of resistance R8
End is connect with the positive terminal of the first end of resistance R9 and capacitor C6 respectively, the negative pole end ground connection of capacitor C6, the second end of resistance R9
It is connect respectively with the first end of the positive terminal of capacitor C8 and current-limiting resistance, the second end ground connection of capacitor C8, the second end of resistance R10
It is connect respectively with the first end of the positive terminal of capacitor C7 and resistance R11, the negative pole end ground connection of capacitor C7, the second end of resistance R11
It is connect respectively with the first end of the positive terminal of capacitor C9 and current-limiting resistance, the second end ground connection of capacitor C9.
Further, the selective acquisition module includes analog switch D5 and for exporting constant current source module to sensing
The supply current of device carries out the voltage sampling unit of voltage sample, the analog switch D5 respectively with gas turbo-generator set
Controller, multiple sensors and signal amplification circuit connection；
The voltage sampling unit includes resistance R12, resistance R13 and resistance R14, the first end of the resistance R12, resistance
The first end of R13 and the first end of resistance R14 are connect with analog switch D1, and the second of the second end of resistance R12 and resistance R13
End is grounded, and the second end of resistance R14 is connect with analog switch D5.
Further, the sensor power supply and data acquisition circuit further include the signal interference for front end to be isolated
Isolation module and for amplify difference mode signal and inhibit common-mode signal differential amplifier circuit, the isolation module respectively with selection
Property acquisition module is connected with differential amplifier circuit.
Further, the isolation module includes operational amplifier N3 and operational amplifier N4, the operational amplifier N3
It is all provided with the follower mode that is set to operational amplifier N4, the first of the non-inverting input terminal of operational amplifier N3 and analog switch D5 is defeated
Outlet connection, the non-inverting input terminal of operational amplifier N4 are connect with the second output terminal of analog switch D5, operational amplifier N3's
Inverting input terminal is connect with its output end, and the inverting input terminal of operational amplifier N4 is also connect with its output end, operational amplifier
The output end of N3 and the output end of operational amplifier N4 are connect with differential amplifier circuit.
Further, the differential amplifier circuit include resistance R15, resistance R16, resistance R17, resistance R18, capacitor C10,
Capacitor C11 and operational amplifier N5, the first end of the resistance R15 are connect with the output end of operational amplifier N3, resistance R15's
Second end is connect with the inverting input terminal of the first end of resistance 17 and operational amplifier N5 respectively, the second end and fortune of resistance R17
The output end connection of amplifier N5 is calculated, the first end of resistance R16 connect with the output end of operational amplifier N4, and the of resistance R16
Two ends are connect with the non-inverting input terminal of the first end of resistance R18 and operational amplifier N5 respectively, the second end ground connection of resistance R18,
No. 4 pins of operational amplifier N5 are connect with the second end of capacitor C10, the first end ground connection of capacitor C10, operational amplifier N5's
No. 7 pins are connect with the second end of capacitor C11, the first end ground connection of capacitor C11, the output end and letter of the operational amplifier N5
The connection of number amplifying circuit.
Further, the signal amplification circuit includes that analog switch D6, resistor chain R19, operational amplifier N6, operation are put
Big device N7, capacitor C12, capacitor C13, capacitor C14 and capacitor C15, the non-inverting input terminal of the operational amplifier N6 are put with operation
The output end connection of big device N5, the inverting input terminal of operational amplifier N6 are connect with analog switch D6, the analog switch D6 and
The controller (20) of gas turbo-generator set connects, and the first end of capacitor C12 and the first end of capacitor C13 are grounded, capacitor
The second end of C12 and the second end of capacitor C13 are connect with analog switch D6, and analog switch D6 is also connect with resistor chain R19, fortune
It calculates amplifier N6 output end to connect with the non-inverting input terminal of operational amplifier N7, the inverting input terminal and output of operational amplifier N7
End connect with analog switch D6, the output end of operational amplifier N7 is connect with signal analysis device, the first end of capacitor C14 and
The inverting input terminal of operational amplifier N6 connects, and the second end of capacitor C14 is connect with the output end of operational amplifier N6, capacitor
The first end of C15 is connect with the inverting input terminal of operational amplifier N7, the second end of capacitor C15 and the output of operational amplifier N7
End connection；
The resistor chain R19 is formed by multiple resistor coupled in parallel, and channels different from analog switch D6's connect each resistance respectively
It connects, the gating channel of analog switch D6 is controlled by the controller of gas turbo-generator set to select to access in resistor chain R19
To the resistance in operational amplifier N6.
Further, the signal amplification circuit further includes potentiometer RP2, the first end of the potentiometer RP2 be used for
Power supply connection, the second end of potentiometer RP2 are connect with No. 8 pins of operational amplifier N6, the third end of potentiometer RP2 and operation
No. 1 pin of amplifier N6 connects.
The present invention also provides a kind of gas turbo-generator sets, including sensor as described above power supply and data acquisition electricity
Road.
The invention has the following advantages:
Sensor of the invention power supply and data acquisition circuit, by setting constant current source module, selective acquisition module and
Signal amplification circuit, the control signal that wherein constant current source module is issued according to the controller of gas turbo-generator set is to corresponding
Sensor power supply, selective acquisition module are corresponding according to the control signal acquisition that the controller of gas turbo-generator set issues
The output signal of sensor, the control signal setting pair that signal amplification circuit is issued according to the controller of gas turbo-generator set
The enlargement ratio of the output signal of inductive sensing device is set so that the power supply circuit of multiple sensors and signal acquisition circuit be integrated
It sets, not only circuit structure is simple, and use is all electronic device relatively conventional in the market, and production cost is low, and reduces
Engine wiring, alleviates engine weight, has saved space.
In addition, gas turbo-generator set of the invention equally has the above advantages.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the sensor power supply and the modular structure schematic diagram of data acquisition circuit of the preferred embodiment of the present invention.
Fig. 2 is the circuit diagram of the constant current source module in Fig. 1 of the preferred embodiment of the present invention.
Fig. 3 is that the circuit of the signal pre-processing module and selective acquisition module in Fig. 1 of the preferred embodiment of the present invention shows
It is intended to.
Fig. 4 is that the circuit of the voltage acquisition unit in the selective acquisition module in Fig. 3 of the preferred embodiment of the present invention shows
It is intended to.
Fig. 5 is the circuit diagram of the isolation module in Fig. 1 of the preferred embodiment of the present invention.
Fig. 6 is the circuit diagram of the differential amplifier circuit in Fig. 1 of the preferred embodiment of the present invention.
Fig. 7 is the circuit diagram of the signal amplification circuit in Fig. 1 of the preferred embodiment of the present invention.
Description of symbols
11, constant current source module；12, selective acquisition module；13, signal amplification circuit；14, signal pre-processing module；15,
Isolation module；16, differential amplifier circuit；20, controller；30, signal analysis device.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited by following and
The multitude of different ways of covering is implemented.
Such as Fig. 1, the preferred embodiment of the present invention provides a kind of sensor power supply and data acquisition circuit, is applied to combustion gas whirlpool
Turbine generator group is used for multiple sensors power supply of gas turbo-generator set, and it is defeated to acquire multiple sensors
Output signal out, by the way that the power supply circuit of multiple sensors, data acquisition circuit is integrally disposed, not only circuit structure letter
Single, production cost is low, and reduces engine wiring, alleviates engine weight, has saved space.The sensor power supply
And data acquisition circuit include constant current source module 11, selective acquisition module 12, signal pre-processing module 14, isolation module 15,
Differential amplifier circuit 16 and signal amplification circuit 13, the constant current source module 11 are connect with multiple sensors, and the selectivity is adopted
Collection module 12 is connect with signal pre-processing module 14, and the signal pre-processing module 14 is connect with multiple sensors, the isolation
Module 15 is connect with selective acquisition module 12 and differential amplifier circuit 16 respectively, the signal amplification circuit 13 respectively with difference
Amplifying circuit 16 and signal analysis device 30 connect.The constant current source module 11 is used to power to multiple sensors, the selection
Property acquisition module 12 be used for selectively acquire in multiple sensors one or more sensors output output signal, i.e., into
The data acquisition of row selectivity, the signal pre-processing module 14 are used for the output signal progress current limliting to sensor, at filtering
Reason, the isolation module 15 are used for interference of the front end to the output signal of sensor, the differential amplifier circuit 16 to be isolated
In amplification difference mode signal and inhibit common-mode signal, the signal amplification circuit 13 is for amplifying the output signal of sensor
Amplified signal is transmitted to external signal analysis device 30 and carries out follow-up signal point by processing, the signal amplification circuit 13
Analysis.In addition, the constant current source module 11, selective acquisition module 12 and signal amplification circuit 13 are also and gas turbine generator
Group controller 20 connect, the controller 20 of gas turbo-generator set can issue control signal control constant current source module 11,
The working condition of selective acquisition module 12 and signal amplification circuit 13, specifically, the constant current source module 11 is according to combustion gas whirlpool
The control signal that the controller 20 of turbine generator group issues is powered to corresponding sensor, selectivity 12 basis of acquisition module
The output signal for the corresponding sensor of control signal acquisition that the controller 20 of gas turbo-generator set issues, the signal are put
The output signal for the control signal setting respective sensor that big circuit 13 is issued according to the controller 20 of gas turbo-generator set
Enlargement ratio.For example, user can issue control signal by the controller 20 of gas turbo-generator set controls constant-current source
Module 11 is powered to wherein one or more sensors, while control selections acquisition module 12 is to corresponding one or more biographies
The output signal of sensor is acquired, while control signal amplifying circuit 13 sets the output of corresponding one or more sensors
The enlargement ratio of signal.It is appreciated that the signal pre-processing module 14, isolation module 15 and differential amplifier circuit 16 can be with
It omits, the selectivity acquisition module 12 directly connect with multiple sensors, and the selective acquisition module 12 is directly and signal
Amplifying circuit 13 connects.
As shown in Fig. 2, the constant current source module 11 includes voltage-stablizer N1, operational amplifier N2, field-effect tube V1, simulates and open
Close D1, potentiometer RP1, resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, diode
D2, diode D3 and diode D4, the analog switch D1 respectively with the controller of gas turbo-generator set 20 and multiple biographies
Sensor connection, only shows in diagram and connect with 3 sensors, particular number it is not limited here, in addition it can by mould
The extension of quasi- switch D1 is connect with more sensors.The analog switch D1 is preferably 8 to select 1 analog switch.The voltage-stablizer
N1 is connected to power supply, and the first end of capacitor C1 is connect with No. 7 pins of voltage-stablizer N1, and the second end of capacitor C1 is with voltage-stablizer N1's
No. 6 pin connections.No. 1 pin of the voltage-stablizer N1 is connect with the first end of the first end of resistance R1 and resistance R3 respectively, electricity
The second end of resistance R1 is connect with the first end of potentiometer RP1, and the second end of potentiometer RP1 is drawn with No. 3 of field-effect tube V1 respectively
Foot is connected with the third end of potentiometer RP1.The second end of resistance R3 is connect with the first end of resistance R2, the second termination of resistance R2
The first end on ground, capacitor C2 is connect with the first end of resistance R3, the second end ground connection of capacitor C2.The second end of resistance R3 also with fortune
Calculate inverting input terminal (the i.e. No. 2 pins) connection of amplifier N2, the non-inverting input terminal (i.e. No. 3 pins) of operational amplifier N2 and field
No. 3 pins of effect pipe V1 connect.No. 4 pins of operational amplifier N2 connect to power supply, the first end ground connection of capacitor C3, capacitor
The second end of C3 is connect with No. 4 pins of operational amplifier N2.The first end of capacitor C4 and No. 1 pin of operational amplifier N2 connect
It connects, the second end of capacitor C4 is connect with No. 8 pins of operational amplifier N2.The output end (i.e. No. 6 pins) of operational amplifier N2
It is connect with No. 4 pins of field-effect tube V1, No. 1 pin of field-effect tube V1 is vacant, and No. 2 pins of field-effect tube V1 are opened with simulation
D1 connection is closed, No. 2 pins of field-effect tube V1 are also connect with the positive terminal of diode D2, diode D2, diode D3 and two poles
Successively series aiding connection, the i.e. negative pole end of diode D2 are connect pipe D4 with the positive terminal of diode D3, the negative pole end of diode D3 with
The positive terminal of diode D4 connects, and the positive terminal ground connection of diode D4, and diode D2, diode D3 and diode D4 play hair
The effect of light instruction.It is appreciated that the diode D2, diode D3 and diode D4 can be omitted.The first end of capacitor C5
It is connect with No. 3 pins of field-effect tube V1, the second end of capacitor C5 is connect with No. 2 pins of field-effect tube V1.It is appreciated that institute
Reference voltage of the 10V voltage of voltage-stablizer N1 output after resistance R2 and resistance R3 partial pressure as operational amplifier N2 is stated, together
When the supply current of sensor, and the output end of operational amplifier N2 are formed by resistance R1, potentiometer RP1 and field-effect tube V1
It can control the conducting degree of field-effect tube V1, the signal of No. 3 pins output of field-effect tube V1 then feeds back to operational amplifier
The non-inverting input terminal (i.e. No. 3 pins) of N2 is for stablizing output to the supply current of sensor.The channel of analog switch D1 gates
It is controlled by three control terminals A, B, C, it will be understood that the control signal of three control terminals A, B, C derive from gas turbine generator
The controller 20 of group, when needing to acquire the signal of some sensor, corresponding supplying channels are opened, to corresponding sensing
Device power supply.The circuit structure of constant current source module 11 of the invention is simple, and what is used is all electronics relatively conventional in the market
Device, manufacturing cost is cheap, also, adjusts output to the supply current of sensor using potentiometer RP1, adjusts very square
Just, the signal feedback between field-effect tube V1 and operational amplifier N2 exports convenient for stablizing to the supply current of sensor.
As shown in figure 3, the signal pre-processing module 14 includes current-limiting resistance R2, R3, R4, R5, R6 and R7, current-limiting resistance
It is separately positioned on every route that selective acquisition module 12 is connected to sensor, plays the role of current limit.In diagram
6 current-limiting resistances are only shown, this with the quantity of sensor be 3 be it is corresponding, when the quantity of sensor increases, cut-off current
Quantity increase therewith, and ensure there is at least one current limliting on every route that selective acquisition module 12 is connected to sensor
Resistance.In addition, the signal pre-processing module 14 further includes resistance R8, resistance R9, resistance R10, resistance R11, capacitor C6, capacitor
C7, capacitor C8, capacitor C9, the first end of the resistance R8 are connect with sensor, and the second end of resistance R8 is respectively with resistance R9's
First end is connected with the positive terminal of capacitor C6, the negative pole end of capacitor C6 ground connection, the second end of resistance R9 respectively with capacitor C8 just
It is extremely connected with the first end of resistance R6, the second end ground connection of capacitor C8, the first end of resistance R10 is connect with sensor, resistance
The second end of R10 is connect with the first end of the positive terminal of capacitor C7 and resistance R11 respectively, the negative pole end ground connection of capacitor C7, resistance
The second end of R11 is connect with the first end of the positive terminal of capacitor C9 and resistance R7 respectively, the second end ground connection of capacitor C9.It can manage
Solution, resistance R8 and capacitor C6, resistance R9 and capacitor C8, resistance R10 and capacitor C7, resistance R11 and capacitor C9 constitute RC low pass
The influence of interference signal can be effectively avoided for some very small signals of value in filter circuit.The selectivity acquisition mould
Block 12 include analog switch D5, the analog switch D5 respectively with the controller of gas turbo-generator set 20 and multiple sensors
Connection, specially 8 logical analog switches, each channel are connect with a sensor respectively, the selectivity acquisition module 12
Channel gating is controlled by three control terminals A, B, C, and three control terminals one that these three control terminals are connect with analog switch D1 are a pair of
It answers, when needing to acquire the signal of some sensor, corresponding acquisition channel is opened, to acquire corresponding sensor
Output signal.
It is appreciated that as shown in figure 4, preferably, it is described selectivity acquisition module 12 further include voltage sampling unit,
For the accuracy for guaranteeing sensor supply current, the voltage sampling unit can carry out voltage to the supply current of sensor and adopt
Sample carries out signal analysis and processing for subsequent signal analysis device 30, and the supply current of sensor is effectively supervised in realization
It surveys.The voltage sampling unit includes resistance R12, resistance R13 and resistance R14, the first end and analog switch of the resistance R12
D1 connection is specifically connect with No. 9 pins of analog switch D1, the second end of resistance R12 ground connection, the first end of resistance R13 also with
Analog switch D1 connection, the second end of resistance R13 are also grounded, and current signal is converted to voltage signal by resistance R12 and resistance R13
Convenient for subsequent detection, the first end of resistance R14 is also connect with analog switch D1, and the second end and analog switch D5 of resistance R14 connects
It connects, the resistance R14 is current-limiting resistance.
As shown in figure 5, the isolation module 15 includes operational amplifier N3 and operational amplifier N4, the operational amplifier
N3 and operational amplifier N4 is all provided with the follower mode that is set to, the non-inverting input terminal (i.e. No. 3 pins) and simulation of operational amplifier N3
The first output end (i.e. No. 32 pins) of switch D5 connects, the non-inverting input terminal (i.e. No. 3 pins) and simulation of operational amplifier N4
The second output terminal (i.e. No. 2 pins) of switch D5 connects, and the inverting input terminal of operational amplifier N3 is connect with its output end, operation
The inverting input terminal of amplifier N4 is also connect with its output end, the output end of operational amplifier N3 and operational amplifier N4 with difference
Amplifying circuit 16 is divided to connect.The isolation module 15 is by the way that operational amplifier N3 and operational amplifier N4 to be all provided with and be set to follower
Mode can be effectively isolated interference of the front end to sensor signal.
As shown in fig. 6, the differential amplifier circuit 16 includes resistance R15, resistance R16, resistance R17, resistance R18, capacitor
C10, capacitor C11 and operational amplifier N5, the first end of the resistance R15 are connect with the output end of operational amplifier N3, resistance
The second end of R15 is connect, resistance with the inverting input terminal (i.e. No. 2 pins) of the first end of resistance 17 and operational amplifier N5 respectively
The second end of R17 is connect with the output end of operational amplifier N5, and the first end of resistance R16 and the output end of operational amplifier N4 connect
It connects, the second end of the resistance R16 non-inverting input terminal (i.e. No. 3 pins) with the first end of resistance R18 and operational amplifier N5 respectively
Connection, the second end ground connection of resistance R18, No. 4 pins of operational amplifier N5 connect with the second end of power supply and capacitor C10 respectively
It connecing, the first end ground connection of capacitor C10, No. 7 pins of operational amplifier N5 are connect with the second end of power supply and capacitor C11 respectively,
The first end of capacitor C11 is grounded, and the output end of the operational amplifier N5 is connect with signal amplification circuit 13.The differential amplification
Circuit 16 is matched with isolation module 15, and the symmetry and negative feedback of circuit parameter is utilized, and can effectively be stablized quiet
State operating point plays the role of amplifying difference mode signal and inhibits common-mode signal.
As shown in fig. 7, the signal amplification circuit 13 includes analog switch D6, resistor chain R19, operational amplifier N6, fortune
Calculate the non-inverting input terminal (i.e. 3 of amplifier N7, capacitor C12, capacitor C13, capacitor C14 and capacitor C15, the operational amplifier N6
Number pin) it is connect with the output end of operational amplifier N5, the inverting input terminal (i.e. No. 2 pins) of operational amplifier N6 is opened with simulation
D6 connection is closed, the analog switch D6 is also connect with the controller of gas turbo-generator set 20, in diagram, the analog switch
D6 is connected by the controller 20 of control terminal A, B, C and gas turbo-generator set, the first end of capacitor C12 and capacitor C13's
First end is grounded, and the second end of capacitor C12 and the second end of capacitor C13 are connect with analog switch D6, and analog switch D6 is also
It is connect with resistor chain R19, operational amplifier N6 output end is connect with the non-inverting input terminal of operational amplifier N7, operational amplifier N7
Inverting input terminal and output end connect with analog switch D6, the output end of operational amplifier N7 also with signal analysis device 30
Connection, the first end of capacitor C14 are connect with the inverting input terminal of operational amplifier N6, the second end and operation amplifier of capacitor C14
The output end of device N6 connects, and the first end of capacitor C15 is connect with the inverting input terminal of operational amplifier N7, and the second of capacitor C15
End is connect with the output end of operational amplifier N7.The resistor chain R19 is formed by multiple resistor coupled in parallel, each resistance respectively with mould
The different channels connection of quasi- switch D6 can control the gating channel of analog switch D6 by control terminal A, B, C to select resistance
The resistance being linked into row R19 in operational amplifier N6, thus the enlargement ratio of the output signal of setting sensor.In addition, institute
Stating signal amplification circuit 13 further includes potentiometer RP2, and the first end of the potentiometer RP2 connects to power supply, and the of potentiometer RP2
Two ends are connect with No. 8 pins of operational amplifier N6, and the third end of potentiometer RP2 is connect with No. 1 pin of operational amplifier N6,
It is conveniently adjusted the zero-bit of amplifier, reduces error.
The specific work process of sensor of the invention power supply and data acquisition circuit does exemplary theory with described below
It is bright, it is not specifically limited.It powers firstly, controlling constant current source module 11 by control terminal A input control signal to sensor 1, together
When control the channel unlatching and 13 setting sensor 1 of control signal amplifying circuit that selective acquisition module 12 is connected to sensor 1
Output signal enlargement ratio, then signal pre-processing module 14 first carries out current limliting, at filtering to the output signal of sensor 1
Reason, then transmits a signal to selective acquisition module 12, signal is further transmitted to isolation by selective acquisition module 12 again
Module 15, isolation module 15 can eliminate interference of the front end to the output signal of sensor 1, and isolation module 15 again passes signal
Differential amplifier circuit 16 is transported to, differential amplifier circuit 16 is matched with isolation module 15, utilizes the symmetry of circuit parameter and negative
Feedback effect, can effectively stable quiescent point, play the role of amplifying difference mode signal and inhibit common-mode signal, difference is put
Output signal is transmitted to signal amplification circuit 13 by big circuit 16, and signal amplification circuit 13 is according to the enlargement ratio set to biography
The output signal of sensor 1 amplifies processing, after the signal after enhanced processing is then transmitted to the progress of signal analysis device 30
Continuous signal analysis and processing.
Sensor of the invention power supply and data acquisition circuit pass through setting constant current source module 11, selective acquisition module
12 and signal amplification circuit 13, wherein constant current source module 11 is believed according to the control that the controller 20 of gas turbo-generator set issues
Number to corresponding sensor power, the control that selective acquisition module 12 is issued according to the controller 20 of gas turbo-generator set
The output signal of the corresponding sensor of signal acquisition, signal amplification circuit 13 are sent out according to the controller 20 of gas turbo-generator set
The enlargement ratio of the output signal of control signal setting respective sensor out, thus by the power supply circuit and letter of multiple sensors
Number Acquisition Circuit is integrally disposed, and not only circuit structure is simple, and use is all electronic device relatively conventional in the market, is produced into
This is low, and reduces engine wiring, alleviates engine weight, has saved space.
It is appreciated that another embodiment of the present invention also provides a kind of gas turbo-generator set comprising as described above
Sensor power supply and data acquisition circuit.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of sensor power supply and data acquisition circuit, power and adopt for multiple sensors to gas turbo-generator set
Collect the output signal of multiple sensors, which is characterized in that
Choosing including the constant current source module (11) for powering to sensor, the output signal for selectively acquiring sensor
Selecting property acquisition module (12) and the signal amplification circuit (13) that processing is amplified for the output signal to sensor；
The constant current source module (11) connect with multiple sensors, it is described selectivity acquisition module (12) respectively with multiple sensors
It is connected with signal amplification circuit (13), the constant current source module (11), selective acquisition module (12) and signal amplification circuit
(13) it is also connect with the controller of gas turbo-generator set (20), the signal amplification circuit (13) is also used to and signal point
Analysis apparatus (30) connection, what the constant current source module (11) was also used to be issued according to the controller (20) of gas turbo-generator set
It controls signal to power to corresponding sensor, the selectivity acquisition module (12) is also used to according to gas turbo-generator set
The output signal for the corresponding sensor of control signal acquisition that controller (20) issues, the signal amplification circuit (13) are also used to
The control signal issued according to the controller (20) of gas turbo-generator set sets the amplification of the output signal of respective sensor
Multiplying power.
2. sensor power supply as described in claim 1 and data acquisition circuit, which is characterized in that
The constant current source module (11) includes voltage-stablizer N1, operational amplifier N2, field-effect tube V1, analog switch D1, potentiometer
RP1, resistance R1, resistance R2, resistance R3, capacitor C1, capacitor C2, capacitor C3, capacitor C4 and capacitor C5；
The voltage-stablizer N1 is connected to power supply, and the first end of capacitor C1 is connect with No. 7 pins of voltage-stablizer N1, and the second of capacitor C1
End is connect with No. 6 pins of voltage-stablizer N1, No. 1 pin of voltage-stablizer N1 respectively with the first end of resistance R1 and resistance R3 first
End connection, the second end of resistance R1 connect with the first end of potentiometer RP1, the second end of potentiometer RP1 respectively with field-effect tube
No. 3 pins of V1 are connected with the third end of potentiometer RP1, and the second end of resistance R3 is put with the first end of resistance R2 and operation respectively
The inverting input terminal connection of big device N2, the second end ground connection of resistance R2, the first end of capacitor C2 are connect with the first end of resistance R3,
The second end of capacitor C2 is grounded, and the non-inverting input terminal of operational amplifier N2 is connect with No. 3 pins of field-effect tube V1, capacitor C3's
First end ground connection, the second end of capacitor C3 are connect with No. 4 pins of operational amplifier N2, the first end and operation amplifier of capacitor C4
No. 1 pin of device N2 connects, and the second end of capacitor C4 is connect with No. 8 pins of operational amplifier N2, and operational amplifier N2's is defeated
Outlet is connect with No. 4 pins of field-effect tube V1, and No. 2 pins of field-effect tube V1 are connect with analog switch D1, analog switch D1
It is connect respectively with the controller of gas turbo-generator set (20) and multiple sensors, the first end and field-effect tube V1 of capacitor C5
The connection of No. 3 pins, the second end of capacitor C5 connect with No. 2 pins of field-effect tube V1.
3. sensor power supply as described in claim 1 and data acquisition circuit, which is characterized in that
The sensor power supply and data acquisition circuit further include that clipping, filtering processing are carried out for the output signal to sensor
Signal pre-processing module (14), the signal pre-processing module (14) respectively with multiple sensors and selective acquisition module
(12) it connects；
The signal pre-processing module (14) includes multiple current-limiting resistances, and the selectivity acquisition module (12) connect with sensor
Every route on be provided with the current-limiting resistance；
The signal pre-processing module (14) further include resistance R8, resistance R9, resistance R10, resistance R11, capacitor C6, capacitor C7,
Capacitor C8, capacitor C9, the first end of the resistance R8 and the first end of resistance R10 are connect with sensor, and the second of resistance R8
End is connect with the positive terminal of the first end of resistance R9 and capacitor C6 respectively, the negative pole end ground connection of capacitor C6, the second end of resistance R9
Connect respectively with the positive terminal of capacitor C8 and current-limiting resistance, the second end of capacitor C8 ground connection, the second end of resistance R10 respectively with electricity
The positive terminal for holding C7 connect with the first end of resistance R11, and the negative pole end of capacitor C7 is grounded, the second end of resistance R11 respectively with electricity
The positive terminal for holding C9 is connected with current-limiting resistance, the second end ground connection of capacitor C9.
4. sensor power supply as claimed in claim 2 and data acquisition circuit, which is characterized in that
The selectivity acquisition module (12) includes analog switch D5 and is used to export constant current source module to sensor (11)
Supply current carry out voltage sample voltage sampling unit, the analog switch D5 respectively with the control of gas turbo-generator set
Device (20), multiple sensors and signal amplification circuit (13) connection；
The voltage sampling unit includes resistance R12, resistance R13 and resistance R14, the first end of the resistance R12, resistance R13
First end and the first end of resistance R14 connect with analog switch D1, the second end of resistance R12 and the second end of resistance R13
It is grounded, the second end of resistance R14 is connect with analog switch D5.
5. sensor power supply as claimed in claim 4 and data acquisition circuit, which is characterized in that
The sensor power supply and data acquisition circuit further include the isolation module (15) for the signal interference of front end to be isolated
With for amplify difference mode signal and inhibit common-mode signal differential amplifier circuit (16), the isolation module (15) respectively with selection
Property acquisition module (12) and differential amplifier circuit (16) connection.
6. sensor power supply as claimed in claim 5 and data acquisition circuit, which is characterized in that
The isolation module (15) includes operational amplifier N3 and operational amplifier N4, the operational amplifier N3 and operation amplifier
Device N4 is all provided with the follower mode that is set to, and the non-inverting input terminal of operational amplifier N3 is connect with the first output end of analog switch D5,
The non-inverting input terminal of operational amplifier N4 is connect with the second output terminal of analog switch D5, the inverting input terminal of operational amplifier N3
It is connect with its output end, the inverting input terminal of operational amplifier N4 is also connect with its output end, the output end of operational amplifier N3
It is connect with differential amplifier circuit (16) with the output end of operational amplifier N4.
7. sensor power supply as claimed in claim 6 and data acquisition circuit, which is characterized in that
The differential amplifier circuit (16) include resistance R15, resistance R16, resistance R17, resistance R18, capacitor C10, capacitor C11 and
Operational amplifier N5, the first end of the resistance R15 are connect with the output end of operational amplifier N3, the second end point of resistance R15
It is not connect with the inverting input terminal of the first end of resistance 17 and operational amplifier N5, the second end and operational amplifier of resistance R17
The output end of N5 connects, and the first end of resistance R16 is connect with the output end of operational amplifier N4, the second end difference of resistance R16
It is connect with the non-inverting input terminal of the first end of resistance R18 and operational amplifier N5, the second end ground connection of resistance R18, operation amplifier
No. 4 pins of device N5 are connect with the second end of capacitor C10, the first end ground connection of capacitor C10, No. 7 pins of operational amplifier N5
It is connect with the second end of capacitor C11, the first end ground connection of capacitor C11, the output end and signal of the operational amplifier N5 amplifies
Circuit (13) connection.
8. sensor power supply as claimed in claim 7 and data acquisition circuit, which is characterized in that
The signal amplification circuit (13) includes analog switch D6, resistor chain R19, operational amplifier N6, operational amplifier N7, electricity
Hold the defeated of non-inverting input terminal and the operational amplifier N5 of C12, capacitor C13, capacitor C14 and capacitor C15, the operational amplifier N6
Outlet connection, the inverting input terminal of operational amplifier N6 are connect with analog switch D6, and the analog switch D6 and gas turbine are sent out
The controller (20) of motor group connects, and the first end of capacitor C12 and the first end of capacitor C13 are grounded, the second end of capacitor C12
It is connect with analog switch D6 with the second end of capacitor C13, analog switch D6 is also connect with resistor chain R19, operational amplifier N6
Output end is connect with the non-inverting input terminal of operational amplifier N7, the inverting input terminal and output end of operational amplifier N7 with simulation
The output end of switch D6 connection, operational amplifier N7 is connect with signal analysis device (30), and first end and the operation of capacitor C14 is put
The inverting input terminal connection of big device N6, the second end of capacitor C14 are connect with the output end of operational amplifier N6, and the of capacitor C15
One end is connect with the inverting input terminal of operational amplifier N7, and the second end of capacitor C15 is connect with the output end of operational amplifier N7；
The resistor chain R19 is formed by multiple resistor coupled in parallel, and the channel connections different from analog switch D6's respectively of each resistance are led to
The gating channel of controller (20) the control analog switch D6 of gas turbo-generator set is crossed to select to be linked into resistor chain R19
Resistance in operational amplifier N6.
9. sensor power supply as claimed in claim 8 and data acquisition circuit, which is characterized in that
The signal amplification circuit (13) further includes potentiometer RP2, and the first end of the potentiometer RP2 is used to connect to power supply,
The second end of potentiometer RP2 is connect with No. 8 pins of operational amplifier N6, the third end of potentiometer RP2 and operational amplifier N6
No. 1 pin connection.
10. a kind of gas turbo-generator set, which is characterized in that supplied including sensor as described in any one of claims 1 to 9
Electricity and data acquisition circuit.
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| CN201910358330.0A CN110146297B (en) | 2019-04-30 | 2019-04-30 | Sensor power supply and data acquisition circuit and gas turbine generator set |
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| CN201910358330.0A CN110146297B (en) | 2019-04-30 | 2019-04-30 | Sensor power supply and data acquisition circuit and gas turbine generator set |
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| CN110146297B (en) | 2021-06-25 |
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