CN104331012B - Air velocity transducer capable of being configured to be current output or voltage output - Google Patents
Air velocity transducer capable of being configured to be current output or voltage output Download PDFInfo
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- CN104331012B CN104331012B CN201410678684.0A CN201410678684A CN104331012B CN 104331012 B CN104331012 B CN 104331012B CN 201410678684 A CN201410678684 A CN 201410678684A CN 104331012 B CN104331012 B CN 104331012B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention relates to an air velocity transducer for monitoring environment, and in particular to an air velocity transducer which is capable of being configured to be current output or voltage output. The velocity transducer comprises a power circuit, a photovoltaic conversion circuit, a single-chip microcomputer minimum system and a digital-to-analogue conversion circuit, wherein the power circuit is connected to the photovoltaic conversion circuit, the single-chip microcomputer minimum system and the digital-to-analogue conversion circuit respectively, the photovoltaic conversion circuit is connected to the single-chip microcomputer minimum system, and the microcomputer minimum system is connected to the digital-to-analogue conversion circuit. Compared with the prior art, the air velocity transducer has the advantages that one air velocity transducer is compatible with four output modes which are 0 - 20mA current output, 4 - 20mA current output, 0 - 5V voltage output and 0 - 10V voltage output. And the required output mode can be configured to be one of the four above modes through modifying embedded software without replacing the air velocity transducer.
Description
Technical field
The present invention relates to environmental monitoring air velocity transducer, more particularly to a kind of wind that can be configured to current/voltage output
Fast sensor.
Background technology
Measuring wind speed needs the different way of outputs, the existing way of output to include frequency in different application scenarios
The modes such as output, universal serial bus output, electric current output and voltage output.Wherein common electric current output form is 0-20mA electric currents
Output and the output of 4-20mA electric currents, common voltage output form is 0-5V voltage outputs and 0-10V voltage outputs.
Existing air velocity transducer can only provide a kind of way of output in an instrument, if necessary to using other defeated
Go out mode, then need more emat sensor, which increase cost and bring trouble.
The content of the invention
In view of the problem that existing air velocity transducer is present, the present invention is proposed and a kind of can be configured to current/voltage output
Air velocity transducer.The air velocity transducer employs single-chip microcomputer and carries out intelligent collection and output control, and single-chip microcomputer gathers original wind
Fast frequency signal, through embedded software computing and process, can configure be output as 0-20mA electric currents output, 4-20mA electric currents it is defeated
Go out, 0-5V voltage outputs and four kinds of modes of 0-10V voltage outputs one kind therein.It is above-mentioned four if necessary to change output form
Another of the form of kind, only need to change embedded program, again after programming program, you can obtain the wind speed of new output form
Sensor.
The present invention is adopted the technical scheme that：A kind of air velocity transducer that can be configured to current/voltage output, its feature exists
In：The air velocity transducer includes power circuit, photoelectric switching circuit, single-chip minimum system and D/A converting circuit, wherein, electricity
Source circuit is connected respectively with photoelectric switching circuit, single-chip minimum system, D/A converting circuit, photoelectric switching circuit and single-chip microcomputer
Minimum system connects, and single-chip minimum system is connected with D/A converting circuit.
Compared with prior art, the present invention has advantages below：
The output of compatibility 0-20mA electric currents, the output of 4-20mA electric currents, 0-5V voltage outputs and 0- in an air velocity transducer
Four kinds of way of outputs of 10V voltage outputs.And can be by changing embedded software, the way of output that configuring needs is above-mentioned four kinds
In one kind, and air velocity transducer need not be changed.
Description of the drawings
Fig. 1 is the system block diagram of the present invention；
Fig. 2 is the power circuit principle figure of the present invention；
Fig. 3 is the power circuit principle figure of the present invention；
Fig. 4 is the power circuit principle figure of the present invention；
Fig. 5 is the photoelectric switching circuit schematic diagram of the present invention；
Fig. 6 is the singlechip minimum system circuit schematic diagram of the present invention；
Fig. 7 is the D/A converting circuit schematic diagram of the present invention；
Fig. 8 is the application flows figure of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described：
As shown in figure 1, the present invention adopts single-chip minimum system, with C8051F330 single-chip microcomputers as main control processor, with electricity
Source circuit, photoelectric switching circuit, D/A converting circuit are connected.Wherein power circuit includes power supply chip LM5009A and its outer
Enclose circuit, TPS7A4901 chips and its peripheral circuit, HT7533-3 chips and its peripheral circuit；Single-chip minimum system includes
C8051F330 single-chip microcomputers, crystal oscillator and other peripheral circuits；Photoelectric switching circuit includes optical-electrical converter and its peripheral circuit；Number
Analog conversion circuit includes digital to analog converter and its peripheral circuit.Embedded software, control collection are run in C8051F330 single-chip microcomputers
The signal of photoelectric conversion module output, and way of output output as required.
As shown in Figure 2, Figure 3, Figure 4, power circuit of the invention adopts TPS7A4901 chip U1, a LM5009A
24V is connect by diode D1 after 8 feet, the connection of 5 feet of chip U2 and a HT7533-3 chip U3, TPS7A4901 chip U1 electric
Source, while connecting one end of electric capacity C1,6 feet of TPS7A4901 chip U1 connect one end of electric capacity C4, the two ends of electric capacity C2, electricity
The two ends of resistance R1 connect respectively 1 foot of TPS7A4901 chip U1,2 feet, and 1 foot of TPS7A4901 chip U1 again with electric capacity C3's
Export 10V power supplys after the connection of one end, 2 feet of TPS7A4901 chip U1 further through resistance R2 and TPS7A4901 chip U1 0 foot
AGND ends are connect with after the other end connection of 4 feet, the other end of electric capacity C3, the other end of electric capacity C4, electric capacity C1 simultaneously.
As shown in figure 3, in power circuit, 6 feet of LM5009A chip U2 are connected by resistance R3 with 8 feet, and and connect
One end of electric capacity C6, one end of electric capacity C5 connect 24V power supplys simultaneously, and 3 feet of LM5009A chip U2 are connected by resistance R4 with 4 feet,
7 feet of LM5009A chip U2 connect one end of electric capacity C7, and 2 feet of LM5009A chip U2 are by the one of electric capacity C8 and inductance L1
End, the negative electrode of diode D2 are connected to 1 foot of LM5009A chip U2, and the other end of inductance L1 connects one end, the resistance of electric capacity C9
One end of R5, one end of resistance R7, the other end of resistance R7 exports 5V power supplys after being connected with one end of electric capacity C10, resistance R5's
The other end connects one end of resistance R6, and and is connected to 5 feet of LM5009A chip U2, electric capacity C10 with the other end of electric capacity C9
The other end, the other end of resistance R6, the other end of electric capacity C7, the anode of diode D2,4 feet, the electric capacity of LM5009A chip U2
DGND ends are connect after the other end of C6, the other end connection of electric capacity C5 simultaneously.
As shown in figure 4, in power circuit, 2 feet of HT7533-3 chip U3, the anode of 0 foot connection tantalum electric capacity C11 connect simultaneously
5V power supplys, 3 feet of HT7533-3 chip U3 connect the anode of tantalum electric capacity C12, while exporting 3.3V power supplys, tantalum electric capacity C11's is negative
End, the negative terminal of tantalum electric capacity C12 be connected with 1 foot of HT7533-3 chip U3 after while connecing DGND ends.
As shown in figure 5, photoelectric switching circuit is turned using a SN74AHC1G14PW phase inverters U4 and an OPB804 photoelectricity
5 feet of parallel operation OPT1, SN74AHC1G14PW phase inverter U4 connect 3.3V power supplys, and connect DGND ends by electric capacity C13,
2 feet of SN74AHC1G14PW phase inverter U4 connect respectively one end of resistance R9,4 feet of OPB804 optical-electrical converter OPT1,
1 foot of OPB804 optical-electrical converter OPT1 is connected by resistance R8 with the other end of resistance R9, while meeting 3.3V power supplys, OPB804
2 feet of optical-electrical converter OPT1 and the connection of 3 feet are followed by DGND ends, and 3 feet of SN74AHC1G14PW phase inverter U4 connect DGND ends, 4 feet
It is connected to 6 feet of C8051F330 single-chip microcomputer U21.
As shown in fig. 6, single-chip minimum system adopts an a C8051F330 single-chip microcomputers U21 and connector J21, together
When single-chip microcomputer be embedded with application program, 19 feet of C8051F330 single-chip microcomputer U21, the two ends of 18 feet difference connecting resistance R21 and crystalline substance
Shake 1 foot, 2 feet of Y21, and connects electric capacity C22, electric capacity C23,2 feet after connection again with C8051F330 single-chip microcomputer U21 respectively
Connection, then connects DGND ends simultaneously, and 3 feet of C8051F330 single-chip microcomputer U21 connect DGND ends by electric capacity C21, and and meets 3.3V
Power supply, 1 foot, 3 feet of connector J21 are connected respectively by wire jumper W21, resistance R22, and 2 feet of connector J21 are connected to
5 feet of C8051F330 single-chip microcomputer U21,3 feet of connector J21 are connected to 4 feet of C8051F330 single-chip microcomputer U21, connector J21
4 feet connect DGND ends.
As shown in fig. 7, D/A converting circuit adopts a DAC7760 digital to analog converter U22, DAC7760 digital to analog converters
2 feet of U22 connect 3.3V power supplys, and respectively by electric capacity C26, the 16 feet company of electric capacity C27 and DAC7760 digital to analog converter U22
Connect and be followed by AGND ends, 14 feet of DAC7760 digital to analog converter U22 and 15 feet connect, and connect AGND ends by electric capacity C29,
7 feet, 8 feet, 9 feet, 10 feet of DAC7760 chip U22 are connected respectively by resistance R27, resistance R28, resistance R29, resistance R30,
Simultaneously 3.3V power supplys are connect, 6 feet of DAC7760 digital to analog converter U22 are connected to 13 feet of C8051F330 single-chip microcomputer U21,
5 feet of DAC7760 digital to analog converter U22,4 feet, 11 feet, the connection of 12 feet are followed by AGND ends, DAC7760 digital to analog converter U22's
18 feet are connected to 1 foot by electric capacity C28 and 0 foot, while connect AGND ends, and respectively by electric capacity C24, electric capacity C25 with
The 24 feet connection of DAC7760 digital to analog converter U22, connection is followed by 10V power supplys, 19 feet and 13 of DAC7760 digital to analog converter U22
Foot connects respectively the two ends of electric capacity C30 by resistance R23, resistance R24, and one end is current output terminal, another termination AGND end,
22 feet and 21 feet of DAC7760 digital to analog converter U22 connect respectively one end of electric capacity C32, the end by resistance R25, resistance R26
For voltage output end, another termination AGND end of electric capacity C32, the two ends of electric capacity C31 are connected to DAC7760 digital to analog converter U22
21 feet and 17 feet, 23 feet of DAC7760 digital to analog converter U22 connect AGND ends.
As shown in fig. 6, C8051F330 single-chip minimum systems are connected with photoelectric switching circuit, by C8051F330 monolithics
The pulse signal of the I/O port collection photoelectric switching circuit output of machine, obtains corresponding frequency, is then calculated current wind speed.
As shown in fig. 7, C8051F330 single-chip microcomputers are connected with D/A converting circuit, by internal processes, C8051F330 is mono-
Corresponding air speed value is scaled the numerical value of corresponding curtage output by piece machine, and controls digital to analog converter output.
As shown in Fig. 2 supply voltage is after anti-reverse diode D1, filter through electric capacity C1, subsequently into
TPS7A4901 chip U1, it is electric through the feedback of electric capacity C2, resistance R1, resistance R2 compositions Jing after TPS7A4901 chips U1 process
Road, then exports after electric capacity C3 filtering.
As shown in figure 3, wherein VIN_24V is connected with the VIN_24V in Fig. 2, filter through electric capacity C5, electric capacity C6, then
ON time is set through resistance R3, resistance R4 is used for current limliting, and electric capacity C7 is used to filter, and electric capacity C8 is start-up capacitance, exports Jing
After crossing sustained diode 2 and inductance L1, through the electronic feedback of electric capacity C9, resistance R5, resistance R6 compositions LM5009A chips are returned
U2, eventually passes the filter circuit output of resistance R7 and electric capacity C10 compositions.
As shown in figure 4, wherein VCC_5V is connected with the VCC_5V in Fig. 3, after electric capacity C11 filtering, into HT7533-
3 chip U3, export after electric capacity C12 filtering.
As shown in figure 5, wherein VCC_3.3 V are connected with the VCC_3.3 V in Fig. 4, after resistance R8 current limlitings, into light
Electric transducer OPT1.Meanwhile, VCC_3.3 V are connected through pull-up resistor R9 with the secondary of optical-electrical converter OPT1.Its output
Signal is exported after phase inverter U4 of the SN74AHC1G14PW with schmidt trigger function carries out Shape correction.Electric capacity C13 is used for
Filtering.
As shown in fig. 6, wherein VCC_3.3 V are connected with the VCC_3.3 V in Fig. 4, it is after electric capacity C21 filtering
C8051F330 single-chip microcomputer U21 power.The P0.2 and P0.3 of C8051F330 single-chip microcomputer U21 is connected with build-out resistor R21, Ran Houlian
Crystal oscillator Y21 is met, and is connected with matching capacitance C22 and C23, constitute crystal oscillating circuit.J21 is emulator interface, can be led to emulator
Cross interface connection single-chip microcomputer C8051F330.2 feet of emulator interface J21 are connected to the 5 of C8051F330 single-chip microcomputer U21 in figure
Foot, 3 feet of emulator interface J21 are connected to 4 feet of C8051F330 single-chip microcomputer U21, and 4 feet of emulator interface J21 meet DGND
End, constitutes artificial circuit.
As shown in fig. 7, wherein VCC_+10V is connected with the VCC_+10V in Fig. 2, filter through electric capacity C24 and electric capacity C25,
Wherein VCC_3.3 V are connected with the VCC_3.3 V in Fig. 4, filter through electric capacity C26 and electric capacity C27, then VCC_+10V and
VCC_3.3 V power for DAC7760 digital to analog converter U22 jointly.Electric capacity C29 is DAC7760 digital to analog converter U22 internal references
The filter capacitor of voltage.Resistance R27, resistance R28, resistance R29, resistance R30 are pull-up resistor, by connecting VCC_3.3 V, are
Corresponding each signal provides electric current.Resistance R23 be electric current output matching resistance, electric capacity C30, electric capacity C32 be filter capacitor, resistance
R24 is that electric current configures resistance, and resistance R25 and resistance R26 is voltage output build-out resistor, and electric capacity C31 is voltage output compensation electricity
Hold.IOUT is current output signal, and VOUT is voltage output signal, is accessed in its system for user.
As shown in figure 8, the application flows of the present invention are：Data are read first, obtain the wind speed frequency value for collecting,
Then air speed value is converted into by calculating, selects according to demand to be electric current output or voltage output, if selecting electric current output,
Range of current output relevant parameter is then configured, the corresponding current value of calculation of wind speed value, configuration exports the current value, that is, export electricity
Stream, is then return at electric current output or voltage output selection, repeats described flow process；If selecting voltage output,
Voltage output range relevant parameter is then configured, the corresponding magnitude of voltage of calculation of wind speed value, configuration exports the magnitude of voltage, that is, export electricity
Pressure, is then return at electric current output or voltage output selection, repeats described flow process.
The embedded software run in C8051F330 single-chip microcomputers reads first I/O port data, by I/O port in calculating 1s
The pulse number of change, obtains the wind speed frequency value that photoelectric conversion module is collected, and is then calculated according to formula v=af+b
Current wind speed, v is air speed value in formula, and unit is m/s, and f is the frequency values that measurement is obtained, and unit is Hz, a and b to calculate ginseng
Number, calculating parameter determines according to specific air velocity transducer.Then, determine it is electric current output or voltage output according to demand.
If electric current output, then configure relevant parameter.For example：If it is determined that the way of output is 0-20mA outputs, then configures digital-to-analogue and turn
Parallel operation is 0-20mA outputs, and is calculated by formula d=1024v/125, and current air speed value is converted to into the current value of output, public
Control parameters of the d for needed for analog-digital converter in formula, v is current air speed value, and using formula control parameter d is calculated, and is controlled
Analog-digital converter is exported.If it is determined that the way of output is 4-20mA outputs, then configures digital to analog converter and export for 4-20mA, other
Be configured to 0-20mA export when it is identical.If voltage output, then relevant parameter is configured.For example：If it is determined that the way of output
For 0-5V outputs, then configure digital to analog converter and export for 0-5V, and calculated by formula d=1024v/125, by current air speed value
The magnitude of voltage of output, control parameters of the wherein d for needed for analog-digital converter are converted to, v is current air speed value, is calculated using formula
Control parameter d is obtained, and then controls analog-digital converter output.If it is determined that the way of output is 0-10V outputs, then configures digital-to-analogue and turn
Parallel operation be 0-10V output, other be configured to 0-5V export when it is identical.
Claims (4)
- It is 1. a kind of to can be configured to the air velocity transducer that current/voltage is exported, it is characterised in that：The air velocity transducer includes power supply electricity Road, photoelectric switching circuit, single-chip minimum system and D/A converting circuit, wherein, power circuit respectively with photoelectric switching circuit, Single-chip minimum system, D/A converting circuit connection, photoelectric switching circuit is connected with single-chip minimum system, the minimum system of single-chip microcomputer System is connected with D/A converting circuit；Described single-chip minimum system is using a C8051F330 single-chip microcomputers U21 and emulator interface J21, while list Piece machine is embedded with application program, and 19 feet of C8051F330 single-chip microcomputer U21,18 feet distinguish two ends and the crystal oscillator of connecting resistance R21 1 foot of Y21,2 feet, and connect electric capacity C22, electric capacity C23 respectively, 2 feet after connection again with C8051F330 single-chip microcomputer U21 connect Connect, then connect DGND ends simultaneously, 3 feet of C8051F330 single-chip microcomputer U21 connect DGND ends by electric capacity C21, and and to meet 3.3V electric Source, 1 foot, 3 feet of emulator interface J21 are connected respectively by wire jumper W21, resistance R22, and 2 feet of emulator interface J21 are connected to 5 feet of C8051F330 single-chip microcomputer U21,3 feet of emulator interface J21 are connected to 4 feet of C8051F330 single-chip microcomputer U21, emulation 4 feet of device interface J21 connect DGND ends；Described D/A converting circuit adopts a DAC7760 digital to analog converter U22,2 feet of DAC7760 digital to analog converter U22 3.3V power supplys are connect, and is connected with 16 feet of DAC7760 digital to analog converter U22 by electric capacity C26, electric capacity C27 is followed by respectively AGND ends, 14 feet of DAC7760 digital to analog converter U22 and 15 feet connect, and connect AGND ends, DAC7760 cores by electric capacity C29 7 feet, 8 feet, 9 feet, 10 feet of piece U22 are connected respectively by resistance R27, resistance R28, resistance R29, resistance R30, while meeting 3.3V Power supply, 6 feet of DAC7760 digital to analog converter U22 are connected to 13 feet of C8051F330 single-chip microcomputer U21, DAC7760 digital-to-analogue conversions 5 feet of device U22,4 feet, 11 feet, the connection of 12 feet are followed by AGND ends, and 18 feet of DAC7760 digital to analog converter U22 pass through electric capacity C28 1 foot is connected to 0 foot, while connecing AGND ends, and passes through electric capacity C24, electric capacity C25 and DAC7760 digital to analog converter U22 respectively The connection of 24 feet, connection is followed by 10V power supplys, and 19 feet and 13 feet of DAC7760 digital to analog converter U22 pass through respectively resistance R23, electricity Resistance R24 connects the two ends of electric capacity C30, and one end is current output terminal, another termination AGND end, DAC7760 digital to analog converter U22's 22 feet and 21 feet connect respectively one end of electric capacity C32 by resistance R25, resistance R26, and the end is voltage output end, electric capacity C32's Another termination AGND ends, the two ends of electric capacity C31 are connected to 21 feet and 17 feet of DAC7760 digital to analog converter U22, DAC7760 numbers 23 feet of weighted-voltage D/A converter U22 connect AGND ends.
- 2. it is according to claim 1 it is a kind of can be configured to current/voltage output air velocity transducer, it is characterised in that：Electricity Source circuit is using TPS7A4901 chip U1, a LM5009A chips U2 and a HT7533-3 chip U3, TPS7A4901 24V power supplys are connect by diode D1 after 8 feet, the connection of 5 feet of chip U1, while connecting one end of electric capacity C1, TPS7A4901 chips 6 feet of U1 connect one end of electric capacity C4, the two ends of electric capacity C2, the two ends of resistance R1 connect respectively 1 foot of TPS7A4901 chip U1,2 Foot, and 10V power supplys, TPS7A4901 chip U1 are exported 1 foot of TPS7A4901 chip U1 is connected with one end of electric capacity C3 again after 2 feet further through resistance R2 and TPS7A4901 chip U1 0 foot and 4 feet, the other end of electric capacity C3, the other end of electric capacity C4, electricity AGND ends are connect after the other end connection for holding C1 simultaneously；6 feet of LM5009A chip U2 are connected by resistance R3 with 8 feet, and and one end, one end of electric capacity C5 of connection electric capacity C6 Simultaneously 24V power supplys are connect, 3 feet of LM5009A chip U2 are connected by resistance R4 with 4 feet, the 7 feet connection electricity of LM5009A chip U2 Hold one end of C7,2 feet of LM5009A chip U2 are connected to by one end of electric capacity C8 and inductance L1, the negative electrode of diode D2 1 foot of LM5009A chip U2, the other end of inductance L1 connects one end, one end of resistance R5, one end of resistance R7 of electric capacity C9, The other end of resistance R7 exports 5V power supplys after being connected with one end of electric capacity C10, the other end of resistance R5 connects one end of resistance R6, And and be connected to 5 feet of LM5009A chip U2 with the other end of electric capacity C9, the other end of electric capacity C10, resistance R6 it is another End, the other end of electric capacity C7, the anode of diode D2,4 feet of LM5009A chip U2, the other end of electric capacity C6, electric capacity C5 it is another DGND ends are connect after the connection of one end simultaneously；2 feet of HT7533-3 chip U3,0 foot connect the anode of tantalum electric capacity C11 while connecing 5V power supplys, and the 3 of HT7533-3 chip U3 Foot connects the anode of tantalum electric capacity C12, while export 3.3V power supplys, the negative terminal of tantalum electric capacity C11, the negative terminal of tantalum electric capacity C12 with DGND ends are connect after the 1 foot connection of HT7533-3 chip U3 simultaneously.
- 3. it is according to claim 1 it is a kind of can be configured to current/voltage output air velocity transducer, it is characterised in that：Light Power conversion circuit adopts an a SN74AHC1G14PW phase inverters U4 and OPB804 optical-electrical converter OPT1, 5 feet of SN74AHC1G14PW phase inverter U4 connect 3.3V power supplys, and connect DGND ends by electric capacity C13, and SN74AHC1G14PW is anti-phase 2 feet of device U4 connect respectively one end of resistance R9,4 feet of OPB804 optical-electrical converter OPT1, OPB804 optical-electrical converter OPT1 1 foot be connected with the other end of resistance R9 by resistance R8, while connect 3.3V power supplys, 2 feet of OPB804 optical-electrical converter OPT1 DGND ends are followed by with the connection of 3 feet, 3 feet of SN74AHC1G14PW phase inverter U4 connect DGND ends, and 4 feet are connected to C8051F330 monolithics 6 feet of machine U21.
- 4. it is according to claim 1 it is a kind of can be configured to current/voltage output air velocity transducer, it is characterised in that：Should It is with program circuit：Data are read first, the wind speed frequency value for collecting is obtained, and then air speed value, root are converted into by calculating It is electric current output or voltage output to select according to demand, if selecting electric current output, configures range of current output relevant parameter, The corresponding current value of calculation of wind speed value, configuration the output current value, i.e. output current, is then return to electric current output or voltage At output selection, described flow process is repeated；If selecting voltage output, voltage output range relevant parameter, meter are configured The corresponding magnitude of voltage of air speed value is calculated, configuration the output magnitude of voltage, i.e. output voltage, are then return to electric current output or voltage is defeated Go out at selection, repeat described flow process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678684.0A CN104331012B (en) | 2014-11-24 | 2014-11-24 | Air velocity transducer capable of being configured to be current output or voltage output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678684.0A CN104331012B (en) | 2014-11-24 | 2014-11-24 | Air velocity transducer capable of being configured to be current output or voltage output |
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| Publication Number | Publication Date |
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| CN104331012A CN104331012A (en) | 2015-02-04 |
| CN104331012B true CN104331012B (en) | 2017-04-19 |
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| CN204215208U (en) * | 2014-11-24 | 2015-03-18 | 中环天仪（天津）气象仪器有限公司 | There is the air velocity transducer of current/voltage output function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5521498B2 (en) * | 2009-11-05 | 2014-06-11 | 富士通株式会社 | Wind speed sensor |
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|---|---|---|---|---|
| JP2004309202A (en) * | 2003-04-03 | 2004-11-04 | Kona Sapporo Kk | Wind speed, and air volume sensor |
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