CN209028456U - A kind of five-hole probe measuring system of integrated nominal data - Google Patents
A kind of five-hole probe measuring system of integrated nominal data Download PDFInfo
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- CN209028456U CN209028456U CN201822169918.5U CN201822169918U CN209028456U CN 209028456 U CN209028456 U CN 209028456U CN 201822169918 U CN201822169918 U CN 201822169918U CN 209028456 U CN209028456 U CN 209028456U
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Abstract
The utility model relates to pressure test technical field, it is especially for a kind of five-hole probe measuring system of integrated nominal data of the acquisition of speed of incoming flow and angle-data during wind tunnel experiment or aircraft flight.Its main feature is that including five-hole probe and appliance case, five-hole probe is rigidly connected by strut and appliance case, system reset key and working station indicator are provided on the appliance case, control circuit board is provided in appliance case, appliance case side is provided with heat dissipation ventilation hole, backup power source mouth, usb communication serial ports and digital output interface；The appliance case back side is additionally provided with data display screen；The control circuit board includes minimum system circuit, and minimum system circuit includes microprocessor and power circuit, and microprocessor periphery is provided with external communication display circuit and sensor data samples circuit.Which raises system reliabilities, reduce exploitation and maintenance time cost；Scalability is strong, reduces flight computer computational load.
Description
Technical field
The utility model relates to pressure test technical fields, are especially for wind tunnel experiment or aircraft flight process
A kind of five-hole probe measuring system of integrated nominal data of the acquisition of middle speed of incoming flow and angle-data.
Background technique
During all kinds of wind tunnel experiments and aircraft flight, accurately measuring speed of incoming flow and stream air angle has
Especially important meaning.But when specifically used, five-hole probe can only draw the impression pressure of five pressure taps, it usually needs match
Set gauge pressure sensor, the sensing equipments such as Bap Sens Barometric Absolute Pressure Sensor and with the matched calibration data of probe set up this five
Mathematical model of a pressure value to parameters such as speed of incoming flow, air-flow angle, stagnation pressure, static pressure.Therefore it is needed for experimenter
Five pore pressure forces are guided into laboratory sensor system using pressure guiding pipe, and organized data processing routine is established according to calibration data
Mathematical model can begin to use, and time cost is higher.Meanwhile pressure guiding pipe is usually rubber tube, is relatively easy to send out in use
The problems such as raw bending, gas leakage, only a five-hole probe needs five impulse pipelines, in probe large-scale use and impulse away from
From under longer environment, impulse system is easier to receive environmental disturbances and extremely inconvenient, the small gas leakage of pipeline inspection is not easy to find,
The mistake that experimental precision even results in experimental result is seriously affected.
Summary of the invention
The purpose of this utility model is that five holes for avoiding the defect of the prior art and providing a kind of integrated nominal data are visited
Needle measuring system efficiently solves the problems, such as of the existing technology.
To achieve the above object, a kind of technical solution that the utility model is taken are as follows: the five of integrated nominal data
Hole probe measuring system, its main feature is that including five-hole probe and appliance case, five-hole probe is rigidly connected by strut and appliance case,
It is provided with system reset key and working station indicator on the appliance case, is provided with control circuit board in appliance case, if
Standby box side is provided with heat dissipation ventilation hole, backup power source mouth, usb communication serial ports and digital output interface；The appliance case back side is also set
It is equipped with data display screen；The control circuit board includes minimum system circuit, minimum system circuit include microprocessor and
Power circuit, microprocessor periphery are provided with external communication display circuit and sensor data samples circuit.
The microprocessor model STM32F405, microprocessor refer to system reset key and working condition
Show lamp be connected, power circuit is connected with backup power source mouth, the external communication display circuit including respectively with microprocessor
Connected serial ports turns USB circuit, serial ports external circuits and LCD output circuit, and the sensor data samples circuit includes point
The first gauge pressure sensor, the second gauge pressure sensor, the third gauge pressure sensor, the 4th table not being connected with microprocessor
Pressure sensor, the 5th gauge pressure sensor, temperature sensor and atmospheric pressure/temperature sensor, above-mentioned five meter pressures sensing
Device is connected to five pressure leading-out ends of five-hole probe end, and temperature sensor experiences end embedment five-hole probe and experiences head.
Output pin 5 and grounding pin the difference connecting resistance R21 and resistance R22 of first gauge pressure sensor are constituted
Bleeder circuit, resistance R21 and resistance R22 draw voltage signal connecting resistance R19, capacitor C34 and clamp diode D6 structure after partial pressure
At RC filter circuit, while with the AD of microprocessor sampling pin PC0 be connected, the second gauge pressure sensor, third gauge pressure
Force snesor, the 4th gauge pressure sensor and the 5th gauge pressure sensor it is identical as the first gauge pressure sensor circuit respectively with it is micro-
AD sampling pin PC1, PC2, PC3, PC4 of type processor, which are connected, acquires pressure signal；The temperature sensor passes through resistance
The AD of RC filter circuit and microprocessor that R43 divided and passed through resistance R35, capacitor C47 and clamp diode D12 composition is adopted
Sample pin PC5 pin, which is connected, acquires atmospheric temperature；Atmospheric pressure/the temperature sensor is followed by through band pull-up resistor R41 and R42
Pin PB6, PB7 of microprocessor acquire othermohygrometer；The pin PC10 of the LCD output circuit and microprocessor,
PC11 is connected, and microprocessor is shown on the data display screen on appliance case by data processing by LCD output circuit, together
When by serial ports turn USB circuit CH1B and configuration circuit and be connected with microprocessor pin PA9, PA10 to be communicated with computer,
Reserved serial ports external circuits are connected with pin PA2, PA3 of microprocessor to carry out data transmission with external equipment.
7~25V input power of the power circuit is followed by XL2 power switch chip through capacitor C16, C17 filtering,
XL2 power switch chip and inductance L3, sustained diode 4, capacitor C10 and C9 constitute switching circuit, by resistance in switching circuit
R3, R4 sampling and outputting voltage are fed back into switch chip FB pin, so that the 7V voltage that output is stable, the output of switching circuit connect
7V is gone to required 5V voltage by linear regulator chip ASM2, and diode is added between ASM2 output pin and input pin
It is protected, the output connection voltage stabilizing chip ASM1 of switching circuit transfers from one department to another required 3.3V voltage of uniting, and in ASM1 output pin
Diode is added between input pin to be protected, capacitor C2, C3 in circuit, C6, C7, C8, C11, C12, C13, C14,
The function of C16, C17 be for reducing circuit ripple, magnetic bead L0, L4 with being mainly used for simulation with being isolated digitally.
The beneficial effects of the utility model are: a kind of five-hole probe measuring system of integrated nominal data, only
Five impulse pipelines for needing one group of signal wire that former scheme can be replaced to use, significantly improve system reliability, avoid impulse
System breakage gas leakage bring experimental error reduces maintenance time cost；Experimenter does not need excessively to pay close attention to five hole measurements original
The accurate data being calculated can be used directly in reason, reduces development time cost；The system expandability is strong, such as hand-holdable flexible
Measurement；It can be used as the calculating of the atmosphere data such as aircraft airspeed and air-flow angular measurement, reduce flight computer computational load.
Detailed description of the invention
Fig. 1 is the utility model axis geodesic structure schematic diagram；
Fig. 2 is the present invention looks up structural representation of the utility model Fig. 1；
Fig. 3 is the five-hole probe head enlarged structure schematic diagram of the utility model Fig. 1；
Fig. 4 is the utility model circuit theory schematic diagram；
Fig. 5 is the utility model control circuit schematic diagram；
Fig. 6 is the utility model power circuit schematic diagram.
It is as shown in the figure: 1. five-hole probes；2. strut；3. heat dissipation ventilation hole；4. appliance case；5. backup power source mouth；6.USB is logical
Believe serial ports；7. digital output interface；8. system reset key；9. working station indicator；10. data display screen；11. temperature passes
Sensor；12. minimum system circuit；12.1. microprocessor；12.2. power circuit；13. external communication display circuit；13.1.
Serial ports turns USB circuit；13.2. serial ports external circuits；13.3.LCD output circuit；14. sensor data samples circuit；14.1.
First gauge pressure sensor；14.2. the second gauge pressure sensor；14.3. third gauge pressure sensor；14.4. the 4th meter pressure
Sensor；14.5. the 5th gauge pressure sensor；14.6. atmospheric pressure/temperature sensor.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
As illustrated in fig. 1 and 2, the five-hole probe measuring system of a kind of integrated nominal data, its main feature is that including five
Hole probe 1 and appliance case 4, five-hole probe 1 are connected by strut 2 and the rigidity of appliance case 4, are provided on the appliance case 4 and are
It unites reset key 8 and working station indicator 9, is provided with control circuit board in appliance case 4,4 side of appliance case is provided with heat dissipation
Ventilation hole 3, backup power source mouth 5, usb communication serial ports 6 and digital output interface 7；4 back side of appliance case is additionally provided with data display screen
10；The control circuit board includes minimum system circuit 12, and minimum system circuit 12 includes microprocessor 12.1 and power supply
Circuit 12.2,12.1 periphery of microprocessor are provided with external communication display circuit 13 and sensor data samples circuit 14.
The 12.1 model STM32F405 of microprocessor, microprocessor 12.1 and system reset key 8 and work
Make status indicator lamp 9 to be connected, power circuit 12.2 is connected with backup power source mouth 5, and the external communication display circuit 13 includes
The serial ports being connected respectively with microprocessor 12.1 turns USB circuit 13.1, serial ports external circuits 13.2 and LCD output circuit
13.3, the sensor data samples circuit 14 includes the first gauge pressure sensor being connected respectively with microprocessor 12.1
14.1, the second gauge pressure sensor 14.2, third gauge pressure sensor 14.3, the 4th gauge pressure sensor 14.4, the 5th gauge pressure
Force snesor 14.5, temperature sensor 11 and atmospheric pressure/temperature sensor 14.6, above-mentioned five gauge pressure sensors are connected to five
Five pressure leading-out ends of 1 end of hole probe, temperature sensor 11 experience end embedment five-hole probe 1 and experience head.
The output pin 5 and grounding pin of first gauge pressure sensor 14.1 distinguish connecting resistance R21 and resistance R22
Bleeder circuit is constituted, resistance R21 and resistance R22 draw voltage signal connecting resistance R19, capacitor C34 and clamp diode after partial pressure
The RC filter circuit that D6 is constituted, while being connected with the AD of microprocessor 12.1 sampling pin PC0, the second gauge pressure sensor
14.2, third gauge pressure sensor 14.3, the 4th gauge pressure sensor 14.4 and the 5th gauge pressure sensor 14.5 and the first table
The identical acquisition that is connected respectively with the AD of microprocessor 12.1 sampling pin PC1, PC2, PC3, PC4 of 14.1 circuit of pressure sensor
Pressure signal；The temperature sensor 11 divides and passes through resistance R35, capacitor C47 and clamp diode by resistance R43
The RC filter circuit of D12 composition is connected with the AD of microprocessor 12.1 sampling pin PC5 pin acquires atmospheric temperature；Described
Atmospheric pressure/temperature sensor 14.6 is followed by pin PB6, PB7 acquisition of microprocessor 12.1 with pull-up resistor R41 and R42
Othermohygrometer；The LCD output circuit 13.3 is connected with pin PC10, PC11 of microprocessor 12.1, microprocessor
12.1 are shown on the data display screen 10 on appliance case 4 by data processing by LCD output circuit 13.3, while passing through string
Mouthful turn USB circuit 13.1CH1B and configuration circuit and be connected with microprocessor 12.1 pin PA9, PA10 to be communicated with computer,
Reserved serial ports external circuits 13.2 are connected with pin PA2, PA3 of microprocessor 12.1 carries out data biography with external equipment
It is defeated.
7~25V input power of the power circuit 12.2 is followed by XL2 power switch core through capacitor C16, C17 filtering
Piece, XL2 power switch chip and inductance L3, sustained diode 4, capacitor C10 and C9 constitute switching circuit, in switching circuit by
Resistance R3, R4 sampling and outputting voltage is fed back into switch chip FB pin so that the stable 7V voltage of output, switching circuit it is defeated
Linear regulator chip ASM2 is met out, 7V is gone to required 5V voltage, and be added two between ASM2 output pin and input pin
Pole pipe is protected, and the output connection voltage stabilizing chip ASM1 of switching circuit transfers from one department to another required 3.3V voltage of uniting, and exports in ASM1
Diode is added between pin and input pin to be protected, capacitor C2, C3 in circuit, C6, C7, C8, C11, C12, C13,
The function of C14, C16, C17 be for reducing circuit ripple, magnetic bead L0, L4 with being mainly used for simulation with being isolated digitally.
A kind of five-hole probe measuring system of the integrated nominal data, when operation, five holes of 1 end of five-hole probe
Five pressure datas are measured respectively, and pressure is led to the gauge pressure sensor of control circuit board by capillary tubing, will be pressed
Power pick-up is voltage signal, and is converted into digital signal by AD sampling.Microprocessor 12.1 is by measure five voltages
Data carry out Kalman filtering and convert to obtain the respective data of 5 pore pressure forces, and experience head to the five-hole probe according to wind-tunnel
Nominal data (each probe has oneself independent nominal data) calculates the incoming flow pitch angle that current probe experiences, partially
Navigate angle, stagnation pressure and static pressure (gauge pressure).Then microprocessor 12.1 reads atmospheric environment absolute pressure and temperature sensor
The probe temperature measured calculates the atmospheric density of probe current position in conjunction with the meter pressure come is measured, and then is exerted by uncle
Sharp equation and related correction model calculate current speed of incoming flow and Mach number.Environment temperature is by atmospheric pressure/temperature sensor
14.6 directly give, and obtain current altitude and ambient air density with reference to current absolute pressure, which can be
The sea level conversion of experimental measurements provides important evidence.Final the above data are shown in facilitating experiment on display screen
Personnel's initial stage confirmatory study, while data easily can also be believed number with digital output interface or USB serial port form
Number it is sent directly to host computer.
A kind of five-hole probe measuring system of integrated nominal data, available data and renewal frequency include:
Air velocity (50HZ), Mach number (50HZ), air-flow pitch angle (50HZ), air-flow yaw angle (50HZ), air-flow stagnation pressure (table
Pressure) (50HZ), air-flow static pressure (gauge pressure) (50HZ), gas flow temperature (50HZ), current density (10HZ), ambient atmosphere pressure (absolute pressure)
(10HZ), current altitude (10HZ).
To limit the utility model, within the spirit and principle of the utility model, made any modification is equally replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (4)
1. a kind of five-hole probe measuring system of integrated nominal data, it is characterized in that including five-hole probe and appliance case, five holes are visited
Needle is rigidly connected by strut and appliance case, and system reset key and working station indicator are provided on the appliance case,
Be provided with control circuit board in appliance case, appliance case side be provided with heat dissipation ventilation hole, backup power source mouth, usb communication serial ports and
Digital output interface；The appliance case back side is additionally provided with data display screen；The control circuit board includes minimum system circuit, most
Mini system circuit includes microprocessor and power circuit, and microprocessor periphery is provided with external communication display circuit and sensing
Device data sampling circuit.
2. a kind of five-hole probe measuring system of integrated nominal data as described in claim 1, it is characterised in that: described is micro-
Type processor model is STM32F405, and microprocessor is connected with system reset key and working station indicator, power circuit
It is connected with backup power source mouth, the external communication display circuit includes that the serial ports being connected respectively with microprocessor turns USB electricity
Road, serial ports external circuits and LCD output circuit, the sensor data samples circuit include being connected respectively with microprocessor
The first gauge pressure sensor, the second gauge pressure sensor, third gauge pressure sensor, the 4th gauge pressure sensor, the 5th table
Pressure sensor, temperature sensor and atmospheric pressure/temperature sensor, above-mentioned five gauge pressure sensors are connected to five-hole probe end
Five pressure leading-out ends in portion, temperature sensor experience end embedment five-hole probe and experience head.
3. a kind of five-hole probe measuring system of integrated nominal data as claimed in claim 2, it is characterised in that: described the
Output pin 5 and grounding pin the difference connecting resistance R21 and resistance R22 of one gauge pressure sensor constitute bleeder circuit, resistance R21
The RC filter circuit that voltage signal connecting resistance R19, capacitor C34 and clamp diode D6 are constituted after dividing is drawn with resistance R22, together
When be connected with the AD of microprocessor sampling pin PC0, the second gauge pressure sensor, third gauge pressure sensor, the 4th gauge pressure
Force snesor and the 5th gauge pressure sensor it is identical as the first gauge pressure sensor circuit respectively with the AD of microprocessor sample
Pin PC1, PC2, PC3, PC4, which are connected, acquires pressure signal；The temperature sensor divides by resistance R43 and passes through resistance
The RC filter circuit of R35, capacitor C47 and clamp diode D12 composition is connected with the AD of microprocessor sampling pin PC5 pin
Acquire atmospheric temperature；Atmospheric pressure/the temperature sensor is through being followed by the pin of microprocessor with pull-up resistor R41 and R42
PB6, PB7 acquire othermohygrometer；The LCD output circuit is connected with pin PC10, PC11 of microprocessor, miniature processing
Device is shown on the data display screen on appliance case by data processing by LCD output circuit, while turning USB electricity by serial ports
Road CH1B and configuration circuit are connected with microprocessor pin PA9, PA10 to be communicated with computer, reserved serial ports external circuits
It is connected with pin PA2, PA3 of microprocessor and carries out data transmission with external equipment.
4. a kind of five-hole probe measuring system of integrated nominal data as described in claim 1, it is characterised in that: the electricity
7~25V input power of source circuit is followed by XL2 power switch chip through capacitor C16, C17 filtering, XL2 power switch chip with
Inductance L3, sustained diode 4, capacitor C10 and C9 constitute switching circuit, by resistance R3, R4 sampling and outputting voltage in switching circuit
It feeds back in switch chip FB pin, so that the 7V voltage that output is stable, the output connection voltage stabilizing chip ASM2 of switching circuit
7V is gone to required 5V voltage, and diode is added between ASM2 output pin and input pin and is protected, switch electricity
The output connection voltage stabilizing chip ASM1 on road transfers from one department to another required 3.3V voltage of uniting, and adds between ASM1 output pin and input pin
Enter diode to be protected, the function of capacitor C2, C3, C6, C7, C8, C11, C12, C13, C14, C16, C17 are to be used in circuit
Reduce circuit ripple, magnetic bead L0, L4 with being mainly used for simulation with being isolated digitally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822169918.5U CN209028456U (en) | 2018-12-24 | 2018-12-24 | A kind of five-hole probe measuring system of integrated nominal data |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822169918.5U CN209028456U (en) | 2018-12-24 | 2018-12-24 | A kind of five-hole probe measuring system of integrated nominal data |
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| CN209028456U true CN209028456U (en) | 2019-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445362A (en) * | 2018-12-24 | 2019-03-08 | 西北工业大学 | A kind of five-hole probe measuring system of integrated nominal data |
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- 2018-12-24 CN CN201822169918.5U patent/CN209028456U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445362A (en) * | 2018-12-24 | 2019-03-08 | 西北工业大学 | A kind of five-hole probe measuring system of integrated nominal data |
| CN109445362B (en) * | 2018-12-24 | 2024-07-19 | 西北工业大学 | Five-hole probe measurement system integrating calibration data |
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