CN201177636Y - Calibrating apparatus for micro propeller current meter - Google Patents
Calibrating apparatus for micro propeller current meter Download PDFInfo
- Publication number
- CN201177636Y CN201177636Y CNU2008200554197U CN200820055419U CN201177636Y CN 201177636 Y CN201177636 Y CN 201177636Y CN U2008200554197 U CNU2008200554197 U CN U2008200554197U CN 200820055419 U CN200820055419 U CN 200820055419U CN 201177636 Y CN201177636 Y CN 201177636Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- current meter
- display
- vernier
- measurement module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Distances Traversed On The Ground (AREA)
Abstract
The utility model discloses a micro-propeller current meter verification device, which consists of a manual control circuit, a distance measurement module, an impeller rotation measurement module, a singlechip and a display, wherein the distance measurement module consists of a disk-type cursor, a photoelectric conversion circuit and a filter circuit; the impeller rotation measurement module consists of a shaping and decoupling circuit and a counting circuit; the manual control circuit is connected with the singlechip; the disk-type cursor, the photoelectric conversion circuit and the filter circuit in the distance measurement module are connected with each other in sequence; the filter circuit is connected with the singlechip; the shaping and decoupling circuit in the impeller rotation measurement module is connected with the singlechip through the counting circuit; and the singlechip is connected with the display. The device is characterized by accurately verifying the running distance of a vehicle and accurately measuring the impeller of the micro-propeller current meter, and can display and record the measured data in time.
Description
Technical field
The utility model relates to the device of a kind of range observation and frequency measurement, in particularly a kind of river model to the calibrating installation of miniature rotating plasma current meter.
Background technology
According to the industry standard SL/T150-95 of the People's Republic of China (PRC) " calibration method of straight line open channel transfer minor current meter ", the calibrating car records the travelling speed v that examines and determine car and the rotation speed n of current meter with certain instrument in the straight line open channel of transversal section uniformity during with the motion of stabilized speed traction current meter.When the calibrating number of times is 22 times, obtain 22 pairs of speed v and rotation speed n data.With these data with least square fitting equation: the v=Kn+C that is in line
In the formula: v---flow velocity, unit: m/s;
K---waterpower pitch, unit: m;
N---rotor revolutions per second, unit: r/s;
C---instrument constant, unit: m/s.
Mainly have the following disadvantages aspect measurement in existing pick-up unit: measuring accuracy is not high, and antijamming capability is not strong, and complex structure uses inconvenience.
The utility model content
The purpose of this utility model is to provide a kind of and meets that industry standard requires, the calibrating installation of practical miniature rotating plasma current meter.
In order to reach described purpose, the miniature rotating plasma current meter calibrating installation that the utility model provides, it is made up of manual control circuit, distance-measurement module, impeller wheel measuring module and single-chip microcomputer, display; Its distance-measurement module is made up of disc type vernier, photoelectric switching circuit and filtering circuit; Impeller wheel measuring module is made up of shaping isolation circuit and counting circuit; Its described manual control circuit connects single-chip microcomputer, disc type vernier, photoelectric switching circuit and filtering circuit are connected successively in the distance-measurement module, filtering circuit is connected with single-chip microcomputer, the shaping isolation circuit is connected with single-chip microcomputer by counting circuit in the impeller wheel measuring module, and above-mentioned single-chip microcomputer is connected with display.
Above-mentioned disc type vernier is placed on the drive sprocket axle of calibrating dolly, and its wheel rim calibration is 10mm, and it is forced that the section start of each lattice is reserved the gap of 1mm; Continuous 11 spaces and interval thereof constitute a vernier on the whole disk wheel rim, and the space is vernier graduation.Be installed in and dig out 10 separately on two relative arc-shaped bases of disk both sides and be spaced apart 11mm, diameter is the circular hole of 2mm, is used for laying infrared transmitting tube and infrared receiving tube respectively.These ten circular holes and interval thereof constitute the main scale of vernier device, and circular hole is the main scale scale.On the vernier main scale on each lattice and the vernier difference of lattice be the accuracy value of vernier or the minimum division value of vernier, so the precision of disc type vernier measurement mechanism is 1mm, can satisfy accuracy requirement with the flow field velocity unit of cm/s nominal.
Shaping isolation circuit in its described impeller wheel measuring module connects an amplifier, and resulting pulse signal is amplified.
The device that the utility model provides meets industry standard requirement, practical, and have travel distance and miniature rotating plasma current meter impeller of calibrating car and measure accurate characteristics, the current meter impeller is measured by the disc type vernier and can be write down the data of being surveyed accurately and can in time write down measured data and demonstration by single-chip microcomputer and display, installing resultant signal simultaneously amplifies with the shaping isolation circuit by amplifier and carries out shaping, can reach weak and strong, the easy to use advantage of antijamming capability of anti-signal; The utility model is simple in structure, realizes easily.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is a schematic diagram of the present utility model.
Fig. 2 is a disc type vernier device structural representation.
Fig. 3 is the displayed map of the LCD module in the utility model.
Fig. 4 is a circuit diagram of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
According to Fig. 1 a kind of miniature rotating plasma current meter calibrating installation provided by the utility model as can be known, it mainly is made up of manual control module, distance-measurement module 1, impeller wheel measuring module 2 and single-chip microcomputer, display; Its distance-measurement module is made up of disc type vernier, photoelectric switching circuit and filtering circuit; Impeller wheel measuring module is made up of shaping isolation circuit and counting circuit; Its described manual control circuit connects single-chip microcomputer, disc type vernier, photoelectric switching circuit and filtering circuit are connected successively in the distance-measurement module, filtering circuit is connected with single-chip microcomputer, the shaping isolation circuit is connected with single-chip microcomputer by counting circuit in the impeller wheel measuring module, and this single-chip microcomputer is connected with display.
Disc type vernier device in the utility model is placed on the drive sprocket axle of calibrating dolly, structure as shown in Figure 2, its wheel rim calibration is 10mm, and it is forced that the section start of each lattice is reserved the gap of 1mm, the infrared ray passage that the infrared transmitting tube of installing as disk 1 one sides sends.Continuous 11 spaces and interval thereof constitute a vernier on the whole disk wheel rim, and the space is vernier graduation.Be installed in and dig out 10 11mm at interval on two relative arc-shaped bases 2 of disk both sides separately, diameter is the circular hole of 2mm, is used for laying infrared transmitting tube and infrared receiving tube respectively.These ten circular holes and interval thereof constitute the main scale of vernier device, and circular hole is the main scale scale.On the vernier main scale on each lattice and the vernier difference of lattice be the accuracy value of vernier or the minimum division value of vernier, so the precision of disc type vernier measurement mechanism is 1mm, can satisfy accuracy requirement with the flow field velocity unit of cm/s nominal.
The external current meter amplifier of photoelectrical coupler in the shaping isolation circuit in the impeller wheel measuring module, after the current meter impeller rotating signal that receives can being amplified by the current meter amplifier like this, forming amplitude is the low frequency pulse signal of 10V, this signal carries out shaping by the photoelectrical coupler pulse signals again, the passage that simultaneously also cuts off electric interference outside the system, so just well avoided extraneous interference, thereby improved the antijamming capability of whole device, be input to the current meter pulse-scaling circuit again through the pulse after the shaping, this pulse signal was counted in the unit interval.Because external six current meters of current meter amplifier, and single-chip microprocessor MCU is limited from tape counter, therefore expand two 8253 counters, can survey three current meters for every 8253, annexation as shown in Figure 4,8253, two counters of counter that provide two expansions among the figure connect 74ALS138 code translator U6 by pin CS, every connects three high-speed photoelectric coupler 6N137 respectively, and three ports connect 74ALS138 code translator U7 by three triode PNP respectively simultaneously.Can finish counting like this to all current meters.
Calibration device in the device is output as input with the current meter amplifier, and then this current-meter rating device also must be designed to six passages.Simultaneously, the control circuit of calibration device is subjected to external operation personnel's control when the dolly uniform motion, carries out regularly and the measurement of various parameters according to its signal that sends; The physical parameters such as speed that the display circuit of calibration device will show dolly operating range, the number of revolutions of current meter impeller, rate is fixed time and calculate, it is 240 * 128 Liquid Crystal Module that display device in this circuit is selected pixel for use, this module includes the display random access memory of 32K byte, there are two kinds of display modes of text and figure selective, will independently write driver its operation.According to Fig. 3, it has provided the circuit of LCD240Y128 module interface, and LCD240Y128 module given on it connects 8255A-5 controller U3 by pin DB1-DB7, connects PNP triode Q41 and 74ALS138 code translator U6 simultaneously.After device is starting MCU and enters the measurement state, the LCD module will show dolly operating range, the number of revolutions of current meter impeller in real time under the control of MCU, rate is fixed time and the physical parameters such as speed that calculate, as shown in Figure 3.
This instrument be that single-chip microcomputer (MCU) adopts ARM single-chip microcomputer (MCU), it can realize the intelligent controlling of instrument.This instrument is when the miniature rotating plasma current meter of calibrating, operating personnel press control knob when the calibrating car is at the uniform velocity transport condition, this moment, MCU monitored that this signal is laggard goes into microsecond level timing operating mode, simultaneously the impeller number of revolutions of current meter was counted, and the operating range of dolly is measured; MCU control impeller wheel measuring module is carried out impeller number of revolutions counting, it inserts current meter impeller rotating signal, and output amplitude is the low frequency pulse signal of 10V behind the current meter amplifier, this signal carries out shaping by the photoelectrical coupler pulse signals again, the passage that simultaneously also cuts off electric interference outside the system, so just well avoided extraneous interference, thereby improved the antijamming capability of whole device, be input to the current meter pulse-scaling circuit again through the pulse after the shaping, realize this pulse signal was counted in the unit interval.The operating range of dolly measured by MCU command range measurement module realize, it at first carries out the nominal flow field velocity measurement of cm/s level by infrared distance measurement device in the disc type vernier in this module, again measured data are passed through the photoelectric switching circuit opto-electronic conversion, convert thereof into electric signal, this electric signal enters into the ripple of filtering circuit elimination output voltage again, and its output is input to MCU and handles; MCU handles the calibrating time that calculates, current meter impeller number of revolutions and dolly operating range with the data that receive, and is presented in real time on the Liquid Crystal Module LCD simultaneously; After treating that operating personnel reset control knob, LCD will fix the little vehicle speed that shows this calibrating (flow field velocity, m/s) with the impeller speed of rotation (the rotor revolutions per second, r/s).
After executing the calibrating number of times of " calibration method of straight line open channel transfer minor current meter " recommendation, obtain 22 pairs of speed v and rotation speed n data.These data with the least square fitting equation v=Kn+C that is in line, are promptly finished the calibrating to miniature rotating plasma current meter.
When the fructufy that obtains by this device was measured 10 meters air line distance now, this device was better than the standard tape measure; When the frequency pulse of measuring below 1000 hertz, its and function generator is equal to.
More than be one of embodiment of the present utility model,, do not spend performing creative labour, on the basis of the foregoing description, can do multiple variation, can realize the purpose of this utility model equally for those skilled in the art.But this variation obviously should be in the protection domain of claims of the present utility model.
Claims (5)
1, miniature rotating plasma current meter calibrating installation, it is made up of manual control circuit, distance-measurement module, impeller wheel measuring module and single-chip microcomputer, display; Described distance-measurement module is made up of disc type vernier, photoelectric switching circuit and filtering circuit; Impeller wheel measuring module is made up of shaping isolation circuit and counting circuit; It is characterized in that, described manual control circuit connects single-chip microcomputer, disc type vernier device, photoelectric switching circuit and filtering circuit are connected successively in the distance-measurement module, filtering circuit is connected with single-chip microcomputer, the shaping isolation circuit is connected with single-chip microcomputer by counting circuit in the impeller wheel measuring module, and above-mentioned single-chip microcomputer is connected with display.
2, miniature rotating plasma current meter calibrating installation according to claim 1 is characterized in that, described disc type vernier is placed on the drive sprocket axle of calibrating dolly, and its wheel rim calibration is 10mm, and it is forced that the section start of each lattice is reserved the gap of 1mm; Continuous 11 spaces and interval thereof constitute a vernier on the whole disk wheel rim, and the space is vernier graduation; Be installed in and dig out 10 separately on two relative arc-shaped bases of disk both sides and be spaced apart 11mm, diameter is the circular hole of 2mm, is used for laying infrared transmitting tube and infrared receiving tube respectively.
3, miniature rotating plasma current meter calibrating installation according to claim 1 is characterized in that, the shaping isolation circuit in the described impeller wheel measuring module connects an amplifier.
4, miniature rotating plasma current meter calibrating installation according to claim 1, it is characterized in that, two counters of expansion in the described counting circuit, two counters connect a code translator by pin respectively, every counter connects three high-speed photoelectric couplers respectively, and unison counter connects another code translator by three triodes respectively.
5, miniature rotating plasma current meter calibrating installation according to claim 1 is characterized in that, described display, and the display module in this display interface device circuit connects controller, connects triode and code translator simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200554197U CN201177636Y (en) | 2008-02-04 | 2008-02-04 | Calibrating apparatus for micro propeller current meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200554197U CN201177636Y (en) | 2008-02-04 | 2008-02-04 | Calibrating apparatus for micro propeller current meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201177636Y true CN201177636Y (en) | 2009-01-07 |
Family
ID=40217659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200554197U Expired - Fee Related CN201177636Y (en) | 2008-02-04 | 2008-02-04 | Calibrating apparatus for micro propeller current meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201177636Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207513A (en) * | 2011-03-15 | 2011-10-05 | 水利部南京水利水文自动化研究所 | Method for calibrating rotor current meter |
| CN105353169A (en) * | 2015-06-26 | 2016-02-24 | 山东省水文局 | Novel current-meter verification pulley |
-
2008
- 2008-02-04 CN CNU2008200554197U patent/CN201177636Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207513A (en) * | 2011-03-15 | 2011-10-05 | 水利部南京水利水文自动化研究所 | Method for calibrating rotor current meter |
| CN102207513B (en) * | 2011-03-15 | 2012-04-18 | 水利部南京水利水文自动化研究所 | Method for calibrating rotor current meter |
| CN105353169A (en) * | 2015-06-26 | 2016-02-24 | 山东省水文局 | Novel current-meter verification pulley |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102401685B (en) | Method and device for carrying out online verification/calibration on open channel flowmeter | |
| US4050295A (en) | Digital measuring system for engine fuel performance | |
| CN102128653A (en) | Distributed optical fiber flow measuring device and method | |
| CN201072422Y (en) | Train speed sensor | |
| CN101004352A (en) | Device for measuring fluxes of multi track, and method | |
| CN103760536A (en) | On-site test method for radar speed detector | |
| CN102133496B (en) | Dust filtering performance testing method and system of air filter for cab of vehicle on road | |
| CN203069616U (en) | Portable wind speed and wind direction measuring instrument | |
| CN201177636Y (en) | Calibrating apparatus for micro propeller current meter | |
| CN111855225A (en) | Method for measuring slip ratio of four-wheel drive tractor | |
| CN102661711A (en) | Non-contact cable length measuring system based on LabVIEW platform | |
| WO2017036000A1 (en) | Rotating speed detection device based on power supply control and output pulse frequency | |
| CN105090084B (en) | Draught fan online monitoring system and method | |
| CN105509871A (en) | Self-calibration device and method applied to vibration sensor | |
| CN206460162U (en) | A kind of standard time clock common source for electric energy metering device calibrating installation | |
| CN201993152U (en) | Aircraft consumption meter tester | |
| CN201917361U (en) | Distributive optical fiber flow rate meter | |
| CN205374497U (en) | Speed measuring device | |
| CN102981015A (en) | Infrared digital speed-detection control system for gear purpose | |
| CN114199318A (en) | Gas volume measuring and calculating method, device and storage medium | |
| CN103631133B (en) | Signal of telecommunication transmission time measurement method and device in a kind of double frequency modulation wire | |
| CN102889915A (en) | Flowmeter and calorimeter asynchronous metering and detecting method and flowmeter and calorimeter asynchronous metering and detecting system based on communication | |
| CN206847837U (en) | A kind of motor vehicle steering wheel power angle instrument self-checking device | |
| CN207751696U (en) | A kind of starter testing stand | |
| CN202041264U (en) | Dynamic weighing device for vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090107 Termination date: 20100204 |