CN205038228U - Gaseous dynamic speed measurement record appearance - Google Patents
Gaseous dynamic speed measurement record appearance Download PDFInfo
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- CN205038228U CN205038228U CN201520833768.7U CN201520833768U CN205038228U CN 205038228 U CN205038228 U CN 205038228U CN 201520833768 U CN201520833768 U CN 201520833768U CN 205038228 U CN205038228 U CN 205038228U
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Abstract
The utility model provides a gaseous dynamic speed measurement record appearance, relates to the gas velocity and measures. It experiences module, analog signal accepting and processing module, velocity of flow display module, velocity of flow data storage module to be equipped with dynamic pressure signal, developments pressure signal experiences the dynamic pressure signal output termination analog signal accepting of module and processing module's input, and analog signal accepting and processing module's gas velocity data signal output connects velocity of flow display module and velocity of flow data storage module's input respectively, analog signal accepting and processing module are equipped with singlechip unit, power supply unit, crystal oscillator filtering unit, RS232 communication unit and state indicating units, the input port of singlechip unit is connected with power supply unit, crystal oscillator filtering unit and RS232 communication unit respectively, and the output port and the state indicating units of singlechip unit are connected, and the output of power supply unit is connected with the input of crystal oscillator filtering unit and RS232 communication unit respectively.
Description
Technical field
The utility model relates to gas velocity and measures, especially relate to can directly display speed, also can be gathered a kind of gas-dynamic velocity survey registering instrument of measuring-signal by computer.
Background technology
No matter measurement gas speed is in life or scientific domain has important effect.Such as, on sports (as the badminton match) arena that some are higher to cross-ventilation rate request, the dynamic change of air wind speed must be monitored at any time; And in gas dynamics experiment, the more too busy to get away kinetic measurement to gas flow rate in the flow field of change.Such as, in air science field, need the change fully understanding flow field around model in aerodynamic testing, kinetic measurement is carried out in stream field change, to take the control measure that flow.Sometimes flow field change speed, ripple frequency can reach hundreds of hertz, even higher.This just requires that the sampling time interval of dynamic speed surveying instrument reaches a millisecond magnitude, and can extract data analysis process.
At present, a lot of measuring method is still and utilizes sensor to be combined with ball bearing made using to measure, its topmost shortcoming to record the change procedure of certain spot speed data in flow field, not high to the measuring accuracy of dynamic speed, and the high measuring equipment of dynamic speed measuring accuracy is generally bulky, involves great expense.
Publication number is that the Chinese patent application of CN102495232A discloses a kind of Portable air speed measuring apparatus of pipeline, comprises test rod, static pressure bar, total depression bar, wind speed numerical monitor meter.Test rod adjustable length, can connect wind speed numerical monitor meter respectively by static pressure bar, total depression bar.The Portable air speed measuring apparatus of pipeline that this invention proposes, wind speed testing element adopts multiple circular balance pipe to be socketed to form, and can realize the test to line wind speed; Adopt numerical monitor pattern, can direct display line wind speed, realize on-the-spot reading.Though this invention has compared with other similar proving installations advantages such as measuring efficiency is high, accurate, fast and easy.But survey data can only artificial read-record, directly cannot gather and be stored in computing machine, therefore cannot kinetic measurement.
Summary of the invention
The purpose of this utility model is to provide not only that volume is little, cost is low, lightweight, kinetic measurement sampling time interval can reach Millisecond (being more than or equal to 2ms), and can gather a kind of gas-dynamic velocity survey registering instrument of measurement data by machine as calculated.
The utility model is provided with dynamic pressure signal and experiences module, simulating signal reception and processing module, flow velocity display module, flow speed data memory module;
Described dynamic pressure signal experiences the dynamic pressure signal output termination simulating signal reception of module and the input end of processing module, and the gas velocity digital signal output end of simulating signal reception and processing module connects the input end of flow velocity display module and flow speed data memory module respectively; Described simulating signal receives and processing module is provided with single machine unit, power supply unit, crystal oscillator filter unit, RS232 communication unit and state indication unit; The input port of single machine unit is connected with power supply unit, crystal oscillator filter unit and RS232 communication unit respectively, the output port of single machine unit is connected with state indication unit, and the output terminal of power supply unit is connected with the input end of crystal oscillator filter unit and RS232 communication unit respectively.
Described dynamic pressure signal experiences module can adopt dynamic pressure transducer, and as a kind of preferred version, dynamic pressure transducer can select piezoelectric transducer.Described simulating signal receives and processing module adopts single-chip microcomputer to build, and as a kind of preferred version, single-chip microcomputer adopts MICROCHIP company 8 central processing unit PIC16F877A.
Described flow velocity display module can adopt charactron flow velocity display module.
Described flow speed data stores and is completed by computing machine.
Principle of work of the present utility model and beneficial effect as follows:
The utility model is by the dynamic pressure of dynamic pressure transducer measurement gas, and pressure is converted into voltage signal form and exports by sensor; Utilize the A/D translation function of PIC single chip microcomputer, voltage signal analog quantity is converted to digital signal; According to Bernoulli's theorem, in single-chip microcomputer, write algorithm, based on the digital signal obtained, calculate gas velocity; After drawing gas velocity, shown in real time by charactron on the one hand, on the other hand, export computing machine to by RS232 serial ports, the change of stored record gas velocity and pressure.The utility model can be applicable to the occasion that aviation, meteorology etc. need measurement gas pressure and speed.
Outstanding advantages of the present utility model is:
1. dynamic pressure transducer of the present utility model converts the pressure experienced change to voltage analog signal, and sampling time interval can reach a millisecond magnitude, and dynamic perfromance is good;
2. flow speed data can be stored in computing machine by flow speed data memory module of the present utility model, for checking at any time, calling and processing further;
3. simulating signal of the present utility model receives and processing module can receive the voltage analog of reflection gaseous tension dynamic change for a long time, is converted into digital signal, and is processed into speed data and records;
If 4. dynamic pressure signal acquisition module of the present utility model selects little probe pressure transducer, flow field point measurement can be carried out;
5. the utility model adopts modular design, is easy to safeguard;
6. the utility model environmental suitability is strong, reliable operation, anti-electromagnetic interference capability are strong;
7. the utility model volume is little, lightweight, and cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of the utility model embodiment 1.
Fig. 2 is that the simulating signal of the utility model embodiment 1 receives and processing module theory diagram.
Fig. 3 is the flow speed data of the utility model embodiment 1 survey record.
Embodiment
Embodiment 1
Fig. 1 provides the schematic block circuit diagram of the utility model embodiment 1.The utility model is provided with dynamic pressure signal and experiences module 1, simulating signal reception and processing module 2, flow velocity display module 3, flow speed data memory module 4; Described dynamic pressure signal experiences the dynamic pressure signal output termination simulating signal reception of module 1 and the input end of processing module 2, and the gas velocity digital signal output end of simulating signal reception and processing module 2 connects the input end of flow velocity display module 3 and flow speed data memory module 4 respectively; Described dynamic pressure signal experiences module 1 can adopt dynamic pressure transducer, and as a kind of preferred version, dynamic pressure transducer can select piezoelectric transducer.Described simulating signal receives and processing module adopts single-chip microcomputer to build, and as a kind of preferred version, single-chip microcomputer adopts MICROCHIP company 8 central processing unit PIC16F877A.
Described flow velocity display module can adopt charactron flow velocity display module.
Described flow speed data stores and is completed by computing machine.
Dynamic pressure signal experiences the HSTL-800 dynamic pressure transducer that module 1 adopts the industrial limited scientific & technical corporation of control of Beijing China to produce, this transducer range 0 ~ 6KPa, sample frequency 500Hz, sensor passes through linear transformation, by the pressure signal value obtained, be transformed to the corresponding voltage value between 0 ~ 5V.This overall sensor size size is about Φ 30*100, and its pressure acquisition bore dia is 1mm.
Simulating signal reception and processing module 2 are the core of gas-dynamic velocity survey registering instrument, and design adopts ripe at present, reliable technology.As Fig. 2, described simulating signal receives and processing module 2 is provided with single machine unit 21, power supply unit 22, crystal oscillator filter unit 23, RS232 communication unit 24 and state indication unit 25; The input port of single machine unit 21 is connected with power supply unit 22, crystal oscillator filter unit 23 and RS232 communication unit 24 respectively, the output port of single machine unit 21 is connected with state indication unit 25, and the output terminal of power supply unit 22 is connected with the input end of crystal oscillator filter unit 23 and RS232 communication unit 24 respectively.
Single machine unit 21 adopts MICROCHIP company 8 central processing unit PIC16F877A to control the functions such as each several part data acquisition, calculating, storage, communication.Pressure signal is experienced module and is exported in the form of a voltage by pressure signal, and single machine unit 21 at RA0 port accepts voltage signal, and by A/D translation function, transfers the voltage analog signal received to digital signal; By prior program of writing in single-chip microcomputer, the voltage digital signal obtained is calculated, draw force value and the speed of gas.In above process, power supply unit 22 provides operating voltage needed for single-chip microcomputer, crystal oscillator filter unit 23 provides clock signal needed for single-chip microcomputer work, state indication unit 25 shows the running status of single-chip microcomputer with the flicker frequency of LED, and RS232 communication unit 24 is responsible for that the gas velocity obtained and pressure signal are uploaded to computing machine and is carried out aftertreatment.
The real-time display module 3 of flow velocity adopts charactron to build.In the Signal reception processing module course of work, the rate conversion of gas is the receivable signal of charactron by the program in single-chip microcomputer that is programmed in, export 74HC138 chip to, show gas velocity in real time by 74HC138 chip controls dibit charactron, displayable flow rates is between 0 to 100m/s.
Flow velocity stored record module 4 is piths of gas-dynamic velocity survey registering instrument, is responsible for record and stores fast-changing gaseous tension and speed.
Figure 3 shows that the speed change curves under adopting the utility model to measure three kinds of different operating states that a kind of pulsating jet obtains.In 25ms, the utility model intactly measures the velocity variations in three cycles.
The utility model has higher time precision (response time is lower than 2ms) and picking rate (frequency acquisition is up to 500HZ), and can measuring speed scope comparatively wide (0 ~ 100m/s).
Claims (6)
1. a gas-dynamic velocity survey registering instrument, is characterized in that being provided with dynamic pressure signal experiences module, simulating signal reception and processing module, flow velocity display module, flow speed data memory module;
Described dynamic pressure signal experiences the dynamic pressure signal output termination simulating signal reception of module and the input end of processing module, and the gas velocity digital signal output end of simulating signal reception and processing module connects the input end of flow velocity display module and flow speed data memory module respectively; Described simulating signal receives and processing module is provided with single machine unit, power supply unit, crystal oscillator filter unit, RS232 communication unit and state indication unit; The input port of single machine unit is connected with power supply unit, crystal oscillator filter unit and RS232 communication unit respectively, the output port of single machine unit is connected with state indication unit, and the output terminal of power supply unit is connected with the input end of crystal oscillator filter unit and RS232 communication unit respectively.
2. a kind of gas-dynamic velocity survey registering instrument as claimed in claim 1, is characterized in that described dynamic pressure signal is experienced module and adopted dynamic pressure transducer.
3. a kind of gas-dynamic velocity survey registering instrument as claimed in claim 2, is characterized in that described dynamic pressure transducer selects piezoelectric transducer.
4. a kind of gas-dynamic velocity survey registering instrument as claimed in claim 1, is characterized in that described simulating signal receives and processing module adopts single-chip microcomputer to build.
5. a kind of gas-dynamic velocity survey registering instrument as claimed in claim 4, is characterized in that described single-chip microcomputer adopts MICROCHIP company 8 central processing unit PIC16F877A.
6. a kind of gas-dynamic velocity survey registering instrument as claimed in claim 1, is characterized in that described flow velocity display module adopts charactron flow velocity display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520833768.7U CN205038228U (en) | 2015-10-26 | 2015-10-26 | Gaseous dynamic speed measurement record appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520833768.7U CN205038228U (en) | 2015-10-26 | 2015-10-26 | Gaseous dynamic speed measurement record appearance |
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| Publication Number | Publication Date |
|---|---|
| CN205038228U true CN205038228U (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520833768.7U Expired - Fee Related CN205038228U (en) | 2015-10-26 | 2015-10-26 | Gaseous dynamic speed measurement record appearance |
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| Country | Link |
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| CN (1) | CN205038228U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066406A (en) * | 2016-05-24 | 2016-11-02 | 首都师范大学 | Air flow rate sensor |
-
2015
- 2015-10-26 CN CN201520833768.7U patent/CN205038228U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066406A (en) * | 2016-05-24 | 2016-11-02 | 首都师范大学 | Air flow rate sensor |
| CN106066406B (en) * | 2016-05-24 | 2018-12-04 | 首都师范大学 | Air flow rate sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160217 Termination date: 20181026 |