CN2888448Y - Rotary oar type flow velocity and direction meter - Google Patents
Rotary oar type flow velocity and direction meter Download PDFInfo
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- CN2888448Y CN2888448Y CN 200520073220 CN200520073220U CN2888448Y CN 2888448 Y CN2888448 Y CN 2888448Y CN 200520073220 CN200520073220 CN 200520073220 CN 200520073220 U CN200520073220 U CN 200520073220U CN 2888448 Y CN2888448 Y CN 2888448Y
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Abstract
The utility model relates to a rotary paddle-velocity flow instrument, which comprises a flow velocity measured signal sensor and a signal reading device, the flow velocity measured sensor signal is composed of a flow velocity probe, a flow rate signal converters, a flow tracking device and a flow signal converter, the signal reading device probe is composed of a framework, a rotating impeller and a flow measurement probe. Signal flow probe is composed of a flow beacon and an electrode unit; the rotary paddle is leveled in the central line of the framework , and can have rotary connection with vertical frame; the flow beacon is labeled as V-shaped leave and the bottom of leave is in the vertical direction of the framework , and the leave can have the rotary connection with tail of framework; the electrode A and B are fixed in the rear of the framework, at the central vertical plane surface of the framework, the electrode A and B are set in between the V-shaped leaves and set up along the level face of the framework in symmetry, and have a gap with V-shaped leaves, a public electrode C sets to zero; the electrode A and B output signals connect to flow tracking device; the output of flow tracking device connects with the flow velocity probe framework and the flow signal converter.
Description
Technical field
The utility model relates to a kind of flow rate and direction instrument, particularly a kind of flow rate and direction instrument of rotary propeller type flow velocity rotor.
Background technology
The flow rate and direction instrument is a kind of instrument of measuring water movement speed and flow direction, can be divided into contact and contactless two classes, contact has Pitot tube current meter, Bentzal tube current meter, rotating element current meter, and (wherein propeller type current meter is used the most general, be divided into three kinds of resistance-type, inductance type and photo-electrics by the structure of its sensor, adopting at present more is photo-electric), hot line current meter, electromagnetic current metre and acoustic doppler velocimeter etc., contactless have laser current meter and a particle image velocimetry system etc.
For a long time, the measurement of model investigation in the river course seashore improvement engineering and flow rate and direction receives the concern of countries in the world always.From developed country's situation in the world, for addressing this problem, be equipped with research institution well-equipped, that peopleware is very high, economize Port and Harbour Research Institute, the federal water conservancy project in German Ka Ersi Rule research institute or the like as CE, US Army waterways experiment station, Dutch Delft water conservancy project research institute, Britain Wallinford water conservancy project laboratory, France all state-run water conservancy project of summer research institute, Japan's transportation.These research institutions have all set up various experimental tanks, have used all kinds of fluid-velocity survey instruments
[1-4], this quasi-instrument mainly contains the ADV three-dimensional speed measurement instrument that two dimension (or three-dimensional) electromagnetic current metre, Norway NORTEK company and U.S. SONTEK company that Japanese OGAWA SEIKI company produces produce, the laser current meter that u s company produces.
We are domestic also how tame research institution, as Nanjing Hydraulic Research Institute, China Water Resources ﹠ Hydropower Science Research Institute, Tsing-Hua University etc., all set up the large-scale model test Room, from external import electromagnetic current metre, ADV knotmeter and laser current meter, and developed the surface particle image speed measurement PIV of system (Particle ImageVelocimetry) and PTV (Particle Trace Velocimetry) etc. voluntarily.But above-mentioned a few class import instrument costs an arm and a leg, the service condition harshness, can only be used for flume test, the particle image velocimetry system also can only be used for the measurement of surface flow field, can't promote the use of general modeling effort and the flow rate and direction in the model test and measure, more have no way of realizing flow rate and direction multiple spot synchro measure.The measurement that flows to fluidised form in the model test at present still adopts probe materials such as silk thread, paper flower, buoy, coloring agent to estimate mostly, and for flowing to change procedure and more can't measure on the flow velocity vertical line.
Existing flow rate and direction instrument, generally by the flow rate and direction instrument by signal pickup assembly, Signal Conditioning Equipment and signal processing apparatus are formed, signal pickup assembly exist flow to the tail vane shape and structure excessive, flow to that automatic tracking system lags behind and the nonsynchronous defective of fluid-velocity survey, this flow rate and direction instrument requires operating depth flow velocity big, that flow to tracking big, and flow to low precision and flow rate and direction is measured nonsynchronous defective, thereby fail to use in practice.
Summary of the invention
The purpose of this utility model is exactly in order to overcome the deficiencies in the prior art, a kind of energy synchro measure flow rate and direction is provided, compared with prior art, minimum operating depth, the minimum flow velocity that flows to tracking and flow directional detection precision index have the flow rate and direction instrument of improvement and raising.
The technical solution of the utility model is, a kind of rotary propeller type flow rate and direction instrument, comprise flow rate and direction signal transducer and signal survey read apparatus, the flow rate and direction signal transducer by flow rate and direction signal measurement probe, flow velocity signal converter, flow to tracking means and flow to signal converter and form, it is characterized in that, flow rate and direction signal measurement probe by framework, revolve oar and the flow directional detection probe is formed; Flowing to the signal measurement probe constitutes by flowing to mark and electrode group; Revolve on the horizontal central line that oar is located at framework, be connected with vertical frame is rotatable; The flow direction is designated as the V-arrangement blade, and blade bottom is located on the vertical direction of framework, and with rotatable connection of horizontal frame of framework afterbody; Electrode A and electrode B are fixed on the vertical plane of framework afterbody inboard, frame plane, and electrode A and electrode B are symmetrical arranged along the surface level of framework, and electrode A and electrode B be located between the V-arrangement blade, and leave the gap with the V-arrangement blade, public electrode C connecting to neutral; The output signal of electrode A and electrode B connects and flows to tracking means; The output that flows to tracking means respectively with flow rate and direction signal measurement probe framework, flow to signal converter and be connected.
Comprise the flow velocity signal sensor in the utility model and flowed to signal transducer two parts, the measurement of flow velocity is undertaken by the flow velocity signal sensor, the measurement that flows to is finished by flowing to signal transducer, the signal measurement probe of two signal transducers is connected as a single entity, be on the basis of existing fluid-velocity survey probe, to have increased the flow directional detection probe segment promptly, for the synchro measure flow rate and direction provides the basis at flow rate and direction fluid-velocity survey probe.
Flow rate and direction signal measurement probe revolves oar, flow direction mark and electrode group by framework, flow velocity to be formed, wherein, flow velocity revolves oar and is used to gather flow velocity signal, and flow direction mark, electrode group are used for acquisition stream to signal, framework is used to support the signals collecting parts, and with flow velocity, flow to acquisition component and combine.
Flow sensor part is by revolving oar and the flow velocity signal converter is formed.Propeller current meter is a kind of of rotating element current meter, promptly, revolve oar and rotate, the rapid-result single-valued relationship of the local flow of its rotating speed and surrounding fluid around the axle parallel with water (flow) direction with current meter as rotor, according to the rotating speed measured value that revolves oar, draw the flow velocity of water particle.The flow velocity signal converter converts the flow velocity signal of being gathered to light, electricity, magnetic etc. can survey signal input signal survey read apparatus.In the utility model, adopt exactly and revolve oar and pop one's head in as fluid-velocity survey, gather flow velocity signal, the flow velocity signal converter adopts photo-electric.
In the utility model, flow to signal probe for flowing to mark and electrode group.Flow direction sensor part is by flowing to signal probe, flow to tracking means and rotary encoder is formed, and the signal inlet flow that flows to the signal measurement probe is to tracking means, the displacement output that flows to tracking means with flow to the signal measurement frame fixation of popping one's head in and be connected.
The process of flow directional detection is to be fixed with a pair of platinum electrode A and B in the inboard that flows to the mark framework, and between the flow direction mark blade certain clearance δ to be arranged
AAnd δ
BPlatinum electrode A and B are relevant with this gap length with the water resistance between the public electrode C (flow speed and direction sensor entry part metals bar wall).When the electrode axis with flow to the parameter line when consistent, water resistance R
AC=R
BC,, then become R if be slightly offset
AC＞R
BCOr R
AG＜R
BCElectrode signal output incoming stream is to tracking means, flow to tracking means and flow to the target position according to input-signal judging, driving the measuring sonde framework rotates to consistent with water (flow) direction, flow to the tracking means output signal simultaneously inlet flow to signal converter, by opto-electronic conversion, can convert the mechanical quantity, swing offset etc. of being defeated by axle to corresponding electric pulse or digital quantity, and input signal is surveyed read apparatus.
In the utility model, the concrete structure that flows to tracking means can be made up of bridge diagram, phase detecting circuit, power driving circuit, miniature permanent magnet DC motor and gear reducer, with R
AC, R
BCInsert bridge circuit, then the output of bridge circuit is with R
AC, R
BCVariation and respective change, this variable quantity is by phase detecting circuit, power driving circuit, control permanent magnet DC motor speed reduction unit rotates, the direct current generator speed reduction unit drives the flow rate and direction detecting head and rotates.Gear reducer can be the tertiary gear transmission, and the output of third level gear is fixedlyed connected with measuring staff, and measuring staff is connected with flow rate and direction signal measurement probe frame fixation.The driving gear that is connected with the DC speed-reducing axle drives the follower gear running by neutral gear, follower gear drives measuring staff and rotates by the direction consistent with the current streamline, since design and installation neutral gear, the direction of sensor probe running is identical with the direction of motor rotation.
Flow to signal converter and adopt rotary-type converter, direct current generator output shaft and rotary-type converter connect as incremental-rotating coder, drive the incremental-rotating coder rotation, the signal that is connected with scrambler survey read apparatus at any time acquisition stream to angle, up to measure finish till.
In the utility model, signal is surveyed read apparatus and is comprised Signal Conditioning Equipment and signal processing apparatus.In order to obtain correct flow velocity signal, improve the reliability of instrument, after the flow velocity input signal, be provided with regulating device, it comprises signal level amplifying circuit and signal transformation circuit.Cooperate software effectively to eliminate undesired signal, guarantee that the current meter signal of the note of surveying is correct.
Signal processing apparatus adopts single-chip computer control system: this system adopts the cpu chip of 89 series, this is a kind of low-power consumption, 8 single-chip microcomputers of high performance CMOS, its internal logic circuit and 8051 single-chip microcomputers are basic identical, and just EPROM, ROM partly are replaced with able to programme, the erasable read-only memory of flicker.Program C-51 language compilation, compact conformation, it is convenient to revise, and is solidificated in the storer of cpu chip.This device also comprises display, keyboard and communication interface, can also comprise μ P watch-dog in addition.As further improvement of the utility model:
Flow velocity revolves oar and adopts through hole molding processing, diameter can be Φ 12mm and Φ 15mm, revolve the oar reflective surface and adopt advanced electroplating technology, wear-resistant, signal is strong, initial velocity≤1cm/s, indexs such as initial velocity, the scope that tests the speed, the linearity, concentricity, calibration coefficient and mean square deviation all more in the past sensor be significantly improved and improve.
Flow velocity revolves oar and flows to signal measurement probe framework and adopt centre support to be connected, on the framework horizontal central line, be provided with a pair of pivot, flow velocity revolves in the center pit of oar and is provided with jack-post, a pair of agate aloxide bearing is inlayed at the two ends of jack-post, form centre support, under flow action, flow velocity revolves oar and can rotate flexibly along current on a pair of upper and lower pivot on the framework.
Flow to mark and be also referred to as tail vane, adopt the proportion special PVC material monolithic die casting poling light and handy triangular vane lighter than water to make, leaf angle becomes 30 ° of angles, has overcome the existing flow direction and has been marked on the shortcoming of very easily damaging and fractureing in the use.
Flow to mark and flow to signal measurement probe framework employing centre support and be connected, at framework vertically to being provided with a pair of upper and lower pivot, flowing to the target top selects for use the PPO material to make jack-post, inlay a pair of agate aloxide bearing jack-post upper and lower, form centre support, under flow action, flow to mark and can on a pair of upper and lower pivot on the framework, make left-right rotation flexibly.
In the utility model, framework adopts molding processing, the flow speed and direction sensor measuring sonde is dexterous accurate, the installation that flows to mark, electrode and agate aloxide bearing also improves, square reduce friction effectively to improve starting sensitivity, to reduce initial velocity, improve measurement sensitivity and resolving power, realized flowing to the minimum flow velocity≤3cm/s that follows the tracks of.
As further improvement of the utility model, also be provided with the microelectrode conducting ring in the flow rate and direction instrument sensor, A and B electrode signal are by microelectrode conducting ring output signal, and the rotation multi-point signal derivation mechanism of the EPSON printer head of Japan has been realized the microminiaturization of electrodes conduct ring, the life-span is long and 360 ° of spinfunctions thereby the electrodes conduct ring is selected for use.
Follow-on resistance bridge is selected in the measuring bridge design for use.
Description of drawings
Fig. 1 is the structured flowchart of the utility model embodiment 1
The structural representation of Fig. 2 flow rate and direction signal transducer
Fig. 3 is the utility model embodiment 1 flow rate and direction acquisition of signal head front view
Fig. 4 is the utility model embodiment 1 flow rate and direction acquisition of signal head master upward view
Fig. 5 is the connection diagram of the utility model embodiment 1 flow rate and direction acquisition of signal tip electrode and framework
Fig. 6 is the structural representation that flows to bridge diagram and phase detecting circuit in the tracking circuit among the utility model embodiment 1
Fig. 7 flows to power driving circuit structural representation in the tracking circuit among the utility model embodiment 1
Fig. 8 flows to miniature permanent magnet DC motor electrical block diagram in the tracking circuit among the utility model embodiment 1
Fig. 9 is the utility model embodiment 1 flow velocity signal converter, scrambler and Signal Conditioning Equipment circuit diagram
Figure 10 is the circuit signal of singlechip CPU in the utility model embodiment 1 signal processing apparatus
Figure 11 is the circuit signal of storer, interface circuit and watch-dog in the utility model embodiment 1 signal processing apparatus
Embodiment
A kind of rotary propeller type flow rate and direction instrument, structured flowchart as shown in Figure 1, comprise that flow rate and direction signal transducer 10 and signal survey read apparatus, flow rate and direction signal transducer 10 by flow rate and direction signal measurement probe 1, flow velocity signal converter 2, flow to tracking means 3 and scrambler 4 is formed.Flow rate and direction signal measurement probe and flow velocity signal converter are fixed on the two ends of measuring staff 8, and the output that flows to tracking means 3 connects respectively by flow rate and direction signal measurement probe 1 and scrambler 4.
Signal is surveyed read apparatus and is comprised Signal Conditioning Equipment 6 and signal processing apparatus 7.As shown in Figure 9, regulating device comprises signal level amplifying circuit 61 and signal transformation circuit 62, cooperates software effectively to eliminate undesired signal, guarantees that the current meter signal of the note of surveying is correct.As shown in figure 10, signal processing apparatus 7 adopts single-chip computer control system: the AT89C52 single-chip microcomputer with American ATMEL is a core control element (CPU) 20.As shown in figure 11, CPU has erasable read-only memory 21, program C-51 language compilation, and compact conformation, it is convenient to revise, and is solidificated in the storer of cpu chip, selects the oscillation frequency clock of 12MHz for use, guarantees inner high-precision timing.Adopt 2 groups of LED, as flow velocity with flow to display; This partial circuit also comprises the input circuit of current meter coefficient, constant and the parameter that tests the speed.In output circuit also design have keyboard, with the standard RS-232/485 interface circuit 23 of PC communication, and auditory tone cues, light indicating circuit etc., this device can also comprise μ P watch-dog 22 in addition.
As shown in Figure 3, the flow rate and direction signal measurement probe 1 acquisition of signal head with the flow velocity and the flow direction combines, flow rate and direction signal measurement probe by framework 11, revolve oar 12 and flow directional detection probe 13 is formed; As shown in Figure 4, flowing to signal measurement probe 13 constitutes by flowing to mark 131 and electrode group 132; Revolve on the horizontal central line that oar 12 is located at framework 11, be connected with vertical frame is rotatable; Flowing to mark 131 be the V-arrangement blade, be located on the vertical direction of framework bottom the blade, and with 111 rotatable connections of horizontal frame of framework 11 afterbodys; As shown in Figure 5, one horizontal frame 111 of framework afterbody is provided with slot 15, electrode group 132 is fixedlyed connected with framework 11 by slot 15, electrode A and electrode B are located on the frame plane vertical plane, electrode A and electrode B are symmetrical arranged along the surface level of framework, and electrode A and electrode B are located between the V-arrangement blade, and leave gap delta with the V-arrangement blade
AAnd δ
B, public electrode C connecting to neutral; The output signal of electrode A and electrode B connects and flows to tracking means, and the output that flows to tracking means 3 connects flow rate and direction signal measurement probe framework 11 and scrambler 4.
Microelectrode conducting ring 8 is installed on measuring staff, see Fig. 3, the electrodes conduct ring has been selected the rotation multi-point signal derivation mechanism of Japanese EPSON printer head for use, has 360 ° of spinfunctions, A and B electrode signal by the electrodes conduct ring with the output signal incoming stream to tracking means 3.
Flow sensor adopts the miniature tachogenerator of optical fiber, and sensor utilizes optical fiber light-guiding.Photoelectric commutator 2 and flow velocity probe 12 are fixedly connected on the two ends of measuring staff 5 respectively, see Fig. 3, and measuring staff 5 is also as the path of optical fiber.
Flow velocity revolves oar 12 and flows to signal measurement probe framework 11 and adopt centre supports to be connected, on the framework horizontal central line, be provided with a pair of pivot, flow velocity revolves in the center pit of oar and is provided with jack-post, a pair of agate aloxide bearing 19 is inlayed at the two ends of jack-post, form centre support, under flow action, flow velocity revolves oar and can rotate flexibly along current on a pair of upper and lower pivot on the framework, sees Fig. 3 and Fig. 4.
Helix angle, pitch, manufacture craft and material etc. that flow velocity revolves oar have all carried out redesigning (please narrate concrete improvement), revolve oar 12 and adopt through hole molding processing, diameter is Φ 12mm, revolve the oar reflective surface and adopt advanced electroplating technology, wear-resistant, signal is strong, initial velocity≤1cm/s, indexs such as initial velocity, the scope that tests the speed, the linearity, concentricity, calibration coefficient and mean square deviation all more in the past sensor be significantly improved and improve.
Fig. 4 and shown in Figure 5, flow direction sensor in present embodiment part flows to signal measurement probe 13 and comprises the electrode group 132 that flows to mark 131 and electrode A, electrode B and public electrode C formation by flowing to signal probe 13, flowing to tracking means 3 and rotary encoder 4 is formed.
Flow to tracking means 3 and form, see Fig. 3 by bridge diagram 31, phase detecting circuit 32, power driving circuit 33, miniature permanent magnet DC motor 34 and gear reducer 35.Bridge diagram 31, phase detecting circuit 32 and power driving circuit 33 constitute flows to tracking circuit such as Fig. 6, shown in Figure 7, the output signal of power driving circuit 33 connects miniature permanent magnet DC motor 34, as shown in Figure 8, gear reducer 35 adopts three-stage gear transmission device, export the measuring staff 5 that is coupling, as shown in Figure 3.
Follow-on resistance bridge has been selected in the measuring bridge design for use, considers the contradiction between bridge circuit sensitivity and the electrode polarization, now elects as for bridge voltage and exchanges 8V, has improved former flow rate and direction instrument and has adopted the coupling transformer performance to be difficult to consistent shortcoming, debugs also simple.Be used for trace flow to drive motor selected miniature DC reducing motor for use, rotating speed is that per minute 30 changes, and has satisfied flowing to 30～40 °/s of maximum tracking velocity.
351 of the one-level gear of direct current generator 34 output shafts by gear reducer are connected with incremental-rotating coder, drive incremental-rotating coder, the signal that is connected with scrambler survey read apparatus at any time acquisition stream to angle, till the measurement end.Flow to signal converter 4 and selected rotary encoder for use, rotary encoder is that light harvesting, mechanical, electrical pin point technique are in the crystallization of one.By opto-electronic conversion, can convert the mechanical quantity, swing offset etc. of being defeated by axle to corresponding electric pulse or digital quantity.Characteristics such as it has that volume is little, in light weight, resolving power is high, moment is little, power consumption is low, stable and reliable for performance, sturdy and durable, long service life.
Shown in Fig. 4,5, flow to mark 131, adopt the proportion special PVC material monolithic die casting poling light and handy triangular vane lighter to make than water, leaf angle becomes 30 ° of angles, has overcome the existing flow direction and has been marked on the shortcoming of very easily damaging and fractureing in the use.
Flow to mark 131 and flow to signal measurement probe framework 11 employing centre supports and be connected, at framework vertically to being provided with a pair of upper and lower pivot, flowing to the target top selects for use the PPO material to make jack-post, inlay a pair of agate aloxide bearing 18 jack-post upper and lower, form centre support, under flow action, flow to mark 131 and can on a pair of upper and lower pivot on the framework, make left-right rotation flexibly.
The process of flow directional detection is to be fixed with a pair of platinum electrode A and B in the inboard that flows to the mark framework, and between the flow direction mark blade certain clearance δ to be arranged
AAnd δ
BPlatinum electrode A and B are relevant with this gap length with the water resistance between the public electrode C (flow speed and direction sensor entry part metals bar wall).When the electrode axis with flow to the parameter line when consistent, water resistance R
AC=R
BC,, then become R if be slightly offset
AC＞R
BCOr R
AG＜R
BC, with R
AC, R
BCInsert bridge circuit, then the output of bridge circuit is with R
AC, R
BCVariation and respective change.This variable quantity is by phase detecting circuit, power driving circuit, and control DC reducing motor rotates, and DC speed-reducing drives the cogwheel gearing that is connected with flow speed and direction sensor.The neutral gear 352 that passes through that is connected with the DC speed-reducing axle drives follower gear running 353, follower gear 353 drives measuring staff 5 and rotates by the direction consistent with the current streamline, because neutral gear 352 has been installed, the direction of measuring staff 5 runnings is identical with the rotation direction of motor 34.
34 in motor connects rotary encoders 4 by driving gear 351, by opto-electronic conversion, converts the mechanical quantity, swing offset etc. of being defeated by axle to corresponding electric pulse or digital quantity.
When rotary encoder is applied to angle orientation or measurement, A, B, the output of Z three-phase are arranged usually.A mutually with B mutually output duty cycle be 50% square wave.Scrambler whenever circles, the pulse (as 360 pulses) that A mutually exports fixed number mutually with B.When scrambler was rotated in the forward, A compared the mutually leading four/one-period of B; When the scrambler reverse rotation, B compares the mutually leading four/one-period of A.The A phase is 90 ± 45 ° with the phase differential that B exports square wave mutually.Scrambler whenever circles, and Z exports a pulse mutually.Because scrambler whenever circles, A mutually and the B pulse of exporting fixed number mutually, then A phase or pulse of the mutually every output of B, the presentation code device has rotated a fixing angle.When Z exported a pulse mutually, the presentation code device had rotated a week.Therefore rotary encoder can measured angular displacement and sense of displacement.
The incremental-rotating coder revolution that flow directional detection is selected for use produces 360 pulses, the axle of scrambler is connected with motor shaft by driving gear, every circle of axle rotates, incremental encoder provides the pulse of some, if added up at a reference point subsequent pulse number, calculated value has just been represented rotational angle, promptly corresponding to a clear and definite angle that flows to, flows to read-out resolution and is ± 1 °.
The flow rate and direction that the utility model can be applied in clear water and the muddy water is measured, particularly in the muddy water model test, the change procedure that flows on the flow velocity vertical line is measured (silk thread and paper flower) with manual method and can't be realized, manual measurement can only be observed the flow direction of surface velocity, the following flow direction in top layer just can't be seen clearly, the flow to change procedure measurement of this flow rate and direction instrument on longshore current speed vertical line also obtained success, sensor has been followed the tracks of main flow direction at any time when measuring mean velocity in vertical, the flow velocity of main flow direction that made institute's velocity measurement authentic representative.
Claims (10)
1, a kind of rotary propeller type flow rate and direction instrument, comprise flow rate and direction signal transducer and signal survey read apparatus, the flow rate and direction signal transducer by flow rate and direction signal measurement probe, flow velocity signal converter, flow to tracking means and flow to signal converter and form, it is characterized in that, flow rate and direction signal measurement probe by framework, revolve oar and the flow directional detection probe is formed; Flowing to the signal measurement probe constitutes by flowing to mark and electrode group; Revolve on the horizontal central line that oar is located at framework, be connected with vertical frame is rotatable; The flow direction is designated as the V-arrangement blade, and blade bottom is located on the vertical direction of framework, and with rotatable connection of horizontal frame of framework afterbody; In the electrode group, electrode A and electrode B are fixed on the vertical plane of framework afterbody, frame plane, and electrode A and electrode B are symmetrical arranged along the surface level of framework, and electrode A and electrode B be located between the V-arrangement blade, and leave the gap with the V-arrangement blade, public electrode C connecting to neutral; The output signal of electrode A and electrode B connects and flows to tracking means; The output that flows to tracking means respectively with flow rate and direction signal measurement probe framework, flow to signal converter and be connected.
According to the described rotary propeller type flow rate and direction of claim 1 instrument, it is characterized in that 2, the inboard of a horizontal frame of described framework afterbody is provided with slot, in the described electrode group link insertion groove, be connected with frame fixation.
According to claim 1 or 2 described rotary propeller type flow rate and direction instrument, it is characterized in that 3, described signal is surveyed read apparatus and comprised Signal Conditioning Equipment and signal processing apparatus, regulating device comprises signal level amplifying circuit and signal transformation circuit; The described signal converter that flows to is a photoelectric encoder.
4, according to claim 1 or 2 described rotary propeller type flow rate and direction instrument, it is characterized in that described flow velocity signal converter is a photoelectric commutator, photoelectric commutator and flow velocity probe are fixedly connected on the two ends of measuring staff respectively, and measuring staff is as the path of optical fiber; Described flow velocity revolves oar and adopts centre support to be connected with being rotatably connected of the vertical frame that flows to signal measurement probe, is provided with a pair of pivot on the framework horizontal central line, and flow velocity revolves in the center pit of oar and is provided with jack-post, and a pair of agate aloxide bearing is inlayed at the two ends of jack-post.
5, according to the described rotary propeller type flow rate and direction of claim 3 instrument, it is characterized in that, described signal processing device is changed to scm managing system, and scm managing system adopts the cpu chip of 89 series, and it is connected to keyboard, display, storer, up watch-dog and communication interface.
According to the described rotary propeller type flow rate and direction of claim 4 instrument, it is characterized in that 6, the described diameter that revolves oar is Φ 12mm.
7, according to the described rotary propeller type flow rate and direction of claim 6 instrument, it is characterized in that, flowing to tracking means is made up of bridge diagram, phase detecting circuit, power driving circuit, direct current generator and gear reducer, bridge diagram, phase detecting circuit, power driving circuit and miniature permanent magnet DC motor are connected successively, and miniature permanent magnet DC motor is exported the gear reducer that is coupling.
According to the described rotary propeller type flow rate and direction of claim 7 instrument, it is characterized in that 8, described gear reducer is a three-stage gear transmission device; Driving gear is connected on the miniature permanent magnet DC motor output shaft, and meshes with neutral gear, neutral gear and follower gear engagement, and follower gear is enclosed within on the measuring staff fixedlys connected with measuring staff.
9, described according to Claim 8 rotary propeller type flow rate and direction instrument is characterized in that, flow to mark and adopt the die casting of PVC material monolithic, and, the V-arrangement leaf angle becomes 30 ° of angles; Flow to that the employing centre support is connected between mark and the horizontal frame that flows to signal measurement probe framework afterbody, at framework vertically to being provided with a pair of upper and lower pivot, flow to the target top and select for use the PPO material to make jack-post, inlay a pair of agate aloxide bearing jack-post upper and lower.
10, according to the described rotary propeller type flow rate and direction of claim 9 instrument, it is characterized in that, be provided with the microelectrode conducting ring on measuring staff, the electrodes conduct ring is the multi-point signal derivation mechanism of 360 ° of rotations, A and B electrode signal insert the electrodes conduct ring, the electrodes conduct ring with the output signal incoming stream to tracking means.
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| CN 200520073220 CN2888448Y (en) | 2005-07-01 | 2005-07-01 | Rotary oar type flow velocity and direction meter |
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| CN112730879A (en) * | 2020-12-08 | 2021-04-30 | 扬州大学 | Intelligent river flow velocity measuring device and method |
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2005
- 2005-07-01 CN CN 200520073220 patent/CN2888448Y/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104597285A (en) * | 2015-02-08 | 2015-05-06 | 赵杰 | Sundries twining preventive canal water flow velocity measurement instrument |
| CN104614546A (en) * | 2015-02-17 | 2015-05-13 | 赵杰 | Three-dimensional canal water flow velocity measuring instrument capable of automatically finding water flow direction |
| CN105547369A (en) * | 2016-01-14 | 2016-05-04 | 中国地质大学（武汉） | Single-hole device for measuring underground water flow velocity and flow direction |
| CN105547369B (en) * | 2016-01-14 | 2017-10-10 | 中国地质大学（武汉） | A kind of groundwater velocity and direction single hole measurement apparatus |
| CN108037312A (en) * | 2017-12-30 | 2018-05-15 | 石家庄铁道大学 | Flow rate of water flow flow direction sensor |
| CN108037312B (en) * | 2017-12-30 | 2024-04-12 | 石家庄铁道大学 | Water flow velocity and direction sensor |
| CN109655633A (en) * | 2018-12-03 | 2019-04-19 | 南京理工大学 | River flow velocity contains husky measuring device |
| CN109557334A (en) * | 2018-12-12 | 2019-04-02 | 水利部交通运输部国家能源局南京水利科学研究院 | Strong tracking float suitable for hinge entrance erea velocity flow profile prototype measurement of opening the navigation or air flight |
| CN109557334B (en) * | 2018-12-12 | 2020-12-25 | 水利部交通运输部国家能源局南京水利科学研究院 | Strong-tracking floater suitable for observing flow velocity distribution prototype at door area of navigation hub |
| CN111831000A (en) * | 2019-04-16 | 2020-10-27 | 北海燕航慧程智能科技有限公司 | ROV automatic posture stabilizing device and ROV |
| CN112730879A (en) * | 2020-12-08 | 2021-04-30 | 扬州大学 | Intelligent river flow velocity measuring device and method |
| CN113777347A (en) * | 2021-09-13 | 2021-12-10 | 鞍钢股份有限公司 | Fluid full-flow indicator |
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