CN108776236A - A kind of coal mine roadway sectional wind velocity measuring instrument and its measurement method - Google Patents
A kind of coal mine roadway sectional wind velocity measuring instrument and its measurement method Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 29
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
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- G—PHYSICS
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- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P11/00—Measuring average value of speed
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Abstract
The invention belongs to coal mine roadway aeration technology fields, and in particular to a kind of coal mine roadway sectional wind velocity measuring instrument and its measurement method.It can in real time, mean wind speed rather than single-point wind speed online, that accurately measure the entire section of coal mine roadway.Technical scheme of the present invention includes host framework and 2 probes, and the probe is connect by signal wire with host framework；Host framework includes upper cover and lower casing, the upper cover is connected on lower casing, it is provided with liquid crystal display on the upper lid, signal-processing board, circuit fixed plate and display communication board are provided in host framework, the circuit fixed plate is fixed on lower casing, signal-processing board is connect with circuit fixed plate, and display communication board is connect with liquid crystal display, is shown for data；The probe is ultrasonic transducer, is connect with signal-processing board by signal wire, and signal-processing board is connected with display communication board, is measured using specific measurement method.
Description
Technical field
Patent of the present invention belongs to coal mine roadway aeration technology field, and in particular to a kind of coal mine roadway sectional wind velocity measuring instrument
And its measurement method.
Background technology
The measuring wind speed of coal mine roadway is always a major issue for perplexing Safety of Coal Mine Production.The detection of wind speed is coal
An important ring for mine ventilating management.The size of wind speed directly influences the life security of miner when coal mining, and wind speed is too small, has
Evil gas cannot timely dilute, and may set off an explosion；When wind speed is excessive, dust explosion may result in.
The measuring wind speed instrument for measuring wind speed currently used for underground coal mine mainly has mechanical anemometer, mechanical electronic mode wind
Fast table, electronics vane type, ultrasonic type etc..To ensure the safety in production of mine, the various tunnels in underground, air port, ventilation blower, well head
Etc. wind speed sensor for coal mine need to be installed, for the air speed value in continuous monitoring mine airway.The detection of wind speed is as coal
An important ring for mine ventilating management, due to the particularity of its measuring environment, measurement has certain difficulty.
The method of traditional measurement wind speed needs to measure the wind speed of multiple points respectively with air speed measuring apparatus, is then averaged
Value, and measured value is recorded by tester.And the measurement of traditional wind speed and survey wind place, wind dial plate placement direction, survey
Amount personnel movement speed, artificial observation etc. have larger contact, so this measure is not real-time, cannot reflect
The mean wind speed of entire drift section, measurement is complicated for operation, efficiency is low and accuracy is not high.
Mining ultrasonic wind speed sensor has two kinds of ultrasonic transit-time and ultrasonic wave Scroll-tupe, and sensors with auxiliary electrode is without machinery
Component, simple in structure, small volume, sturdy and durable, precision is high, can accurately measure the radio-frequency component of wind pulse in natural wind battle array,
Gradually replace tradition machinery formula air speed measuring apparatus, by more and more extensive application.
To solve the above problems, developing, one kind can Measure section mean wind speed, real time monitoring, precision be higher super in real time
Sound wave sectional wind velocity measuring instrument is very necessary.
Invention content
In view of this, the present invention provides a kind of coal mine roadway sectional wind velocity measuring instrument and its measurement method, can in real time,
Mean wind speed rather than single-point wind speed online, that accurately measure the entire section of coal mine roadway.
In order to solve the problems existing in the prior art, the technical scheme is that：A kind of coal mine roadway sectional wind velocity measurement
Instrument, it is characterised in that：It pops one's head in including host framework and 2, the probe is connect by signal wire with host framework；
The host framework includes upper cover and lower casing, and the upper cover is connected on lower casing, is arranged on the upper lid
There is liquid crystal display, signal-processing board, circuit fixed plate and display communication board, the circuit are provided in host framework and is fixed
Plate is fixed on lower casing, and signal-processing board is connect with circuit fixed plate, and display communication board is connect with liquid crystal display, is used for data
Display；
The probe is ultrasonic transducer, is connect with signal-processing board by signal wire, signal-processing board and display
Communication board is connected.
Each probe is fixed by fixing device for installing；
The structure of fixing device for installing includes bearing, bracket at corner and probe bracket, and the bracket at corner includes corner
Holder one and bracket at corner two, the bracket at corner one and bracket at corner two are relatively set into rectangle frame, the corner branch
Frame one is connected by screw with bearing, and bracket at corner two is connected by screw with probe bracket, and probe passes through fixing nut and spy
Head bracket connects.
The bracket at corner one is inverse u shape, and semi-circular groove is respectively arranged on two sides；The bracket at corner
Two be U-typed, thirdly being respectively arranged with semi-circular groove on side；Screw and corner branch are provided in the semi-circular groove of bracket at corner one
Frame two connects, and be provided with screw in the semi-circular groove of bracket at corner two connect with bracket at corner one, one bottom of bracket at corner
Screw is provided in the semi-circular groove in portion to connect with bearing.
A kind of measurement method step of coal mine roadway sectional wind velocity measuring instrument includes：
1) coal mine roadway sectional wind velocity measuring instrument is mounted on straight tunnel, the ventilation lane for selecting horizontal slope little；
2) probe spacing setting：Two of air speed measuring apparatus are popped one's head in and is fixed on the fixing device for installing of air speed measuring apparatus
On, two alignment probes are estimated, the centre distance between two probes is measured, which is arranged into air speed measuring apparatus；
3) alignment probe：By two of air speed measuring apparatus height alignments of popping one's head in；
Alignment methods are：A probe is first fixed, the direction of another probe is converted, observation shows the signal of screen display
Peak value, peak value is bigger, and that pops one's head in pair is more accurate, when peak value is most strong, remains stationary as, fixes two probes；
4) installation parameter is determined
Direct range, axial distance, the lateral distance for measuring the central point of two probes after alignment, for calculating probe
With the angle of wind direction；
5) parameter setting
By institute probing head direct range L, lateral distance, axial distance, memory gap, station number are arranged into air speed measuring apparatus
In；
6) enter normal mode of operation
If instrument is in Installation Modes, it is set to normal mode of operation or power-off restarting, air speed measuring apparatus is
Normal mode of operation can be entered；
7) logic control and data operation.
The transmitting and reception of air speed measuring apparatus control probe, and the acoustic signals received are acquired, through ovennodulation
After demodulation, using signal-processing board data processing module and show the analyzing processing and calculating of communication board, obtain specific
Wind speed.
The detailed process of the step 7) is：
First, pass through the transmitting of signal-processing board control probe and reception direction；
The transmitting and reception of a pair of of probe of main control chip control of signal-processing board, when a pair of probe emits at one, separately
One is in reception state, and after the propagation time of the side is completed in acquisition, switching sends and receives direction, continues to acquire the side
Propagation time, and so on；
Secondly, the signal that signal-processing board will receive inputs main control chip by amplification, filtering, shaping etc.；
Third, main control chip adjust amplification and detecting circuit according to signal waveform；
4th, main control chip is filtered collected signal, compares, adjusting, seeking the calculation process such as extreme value, calculates
Time and contrary wind time with the wind.
L is ultrasonic wave path, that is, distance between popping one's head in, and C is the velocity of sound, and α is the angle between the direction and wind speed of probe, by
Installation parameter is calculated.
The downwind delivery time is：
The upwind delivery time is：
5th, the obtained time with the wind is reported to display communication board to signal-processing board with the contrary wind time or other are upper
Machine.
6th, wind speed V is calculated according to time difference method and installation parameter in display communication board, is shown by liquid crystal.Meter
Calculating formula is：
(8) multi-parameter monitoring system is accessed：Using signal wire connection air speed measuring apparatus and multi-parameter monitoring system, wind speed is surveyed
Collected data are uploaded to multi-parameter monitoring system software by amount instrument, and user can see at the real time data interface of the software
To the real time information of wind speed, remotely monitor is realized.
Compared with prior art, advantages of the present invention is as follows：
1. applied widely：It can carry out the mean wind speed measurement of coal mine roadway, tunnel, spacious place equal section, the section
The place that all desired test wind speed can be covered, is suitable for telemeasurement；
2. solving the problems, such as the inaccuracy that tests the speed：To the wind speed in a region, Single-point velocity determination can only show the wind speed of a bit,
Single-point wind speed is related with position, can not show the whole velocity wind levels of whole region, and in of the invention, measurement is that entire wind of crossing breaks
The mean wind speed in face, solves problems；
3. online real-time monitoring：The measuring instrument has system interface, multi-parameter monitoring system can be directly accessed, by more
Parameter monitoring system is analyzed and is handled to the parameter monitored, and independent monitor is also can be used as, and isolated operation stores number
According to suitable to monitor for a long time；
4. strong interference immunity, short time vehicle in region of testing the speed, pedestrian pass through unaffected.
5. saving manpower：The present invention, can real-time online prison instead of the mode of original manually spot measurement wind speed
It surveys, improves measurement efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of invention；
Fig. 2 is the structure chart of the host part in Fig. 1；
Fig. 3 is the fixing device for installing structure chart of probe；
Fig. 4 is air speed measuring apparatus scheme of installation；
Fig. 5 is installation parameter schematic diagram；
Fig. 6 is the structure diagram of signal-processing board；
Fig. 7 is the data processing module circuit diagram of signal-processing board；
Fig. 8 is the memory module circuit diagram of signal-processing board；
Fig. 9 is the transmitting and receiving module circuit diagram of signal-processing board；
Figure 10 is the reception signal processing circuit circuit diagram of signal-processing board；
Figure 11 is the programmable amplifying circuit circuit diagram of signal-processing board；
Figure 12 is the automatically controlled amplifying circuit circuit diagram of signal-processing board；
Figure 13 is the communicating circuit circuit diagram of signal-processing board；
Figure 14 is the power module circuitry figure of signal-processing board；
Figure 15 is the structure diagram for showing communication board；
In figure, 1- upper covers, 2- cable locks, 3- liquid crystal displays, 4- probes, 5- lower casings, 6- signal processing circuit boards, 7-
Circuit fixed plate, 8- display communication boards, 9- bearings, 10- bracket at corner one, 11- bracket at corner two, 12- probe brackets, 13- are solid
Determine nut.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention solves in entire aerated area, and Single-point velocity determination can not embody the technology of the average level in entire air duct
Problem also can access on-line real time monitoring wind speed in multi-parameter monitoring system, can create huge economic benefit and social benefit.
The present embodiment provides a kind of coal mine roadway sectional wind velocity measuring instruments (referring to Fig. 1-Fig. 2), including host framework and one
To probe 4, it is connected by signal wire between the host framework and probe 4, and by 2 fixed signal line of cable lock.
The host framework includes upper cover 1 and lower casing 5, and the upper cover 1 is connected on lower casing 5, in the upper cover 1
It is provided with liquid crystal display 3, signal-processing board 6, circuit fixed plate 7 and display communication board 8 are provided in host framework, it is described
Circuit fixed plate 7 is fixed on lower casing 5, and signal-processing board 6 is connect with circuit fixed plate 7, shows communication board 8 and liquid crystal display
3 connections, show for data.
The probe 4 is ultrasonic transducer, is connect with signal-processing board 6 by signal wire, and signal wire passes through cable
Tapered end 2 enters host and is fixed by cable lock 2, and signal-processing board 6 is connected with display communication board 8.
The display communication board 8 includes two-way interface, is connected all the way with signal-processing board 6, (join with host computer all the way more
Number monitoring system, parameter setting software etc.) it is connected.
Referring to Fig. 3：The structure of fixing device for installing includes bearing 9, bracket at corner and probe bracket 12, the corner branch
Frame includes bracket at corner 1 and bracket at corner 2 11, and the bracket at corner 1 and bracket at corner 2 11 are relatively set into square
Shape frame, the bracket at corner 1 are inverse u shape, and semi-circular groove is respectively arranged on two sides；The bracket at corner
2 11 be U-typed, thirdly being respectively arranged with semi-circular groove on side；It is provided with screw in the semi-circular groove of bracket at corner 1 and turns
Angle support 2 11 connects, and be provided with screw in the semi-circular groove of bracket at corner 2 11 connect with bracket at corner 1, and described turns
Screw is provided in the semi-circular groove of one 10 bottom of angle support to connect with bearing 9；
The bracket at corner 1 is connected by screw with bearing 9, and bracket at corner 2 11 passes through spiral shell with probe bracket 12
Nail connection, probe 4 are connect by fixing nut 13 with probe bracket 12.
By the fixing device for installing of probe, probe 4 may be implemented to rotate up and down.
A kind of implementation method of coal mine roadway sectional wind velocity measuring instrument is:
The measuring part of the sectional wind velocity measuring instrument includes a pair of of probe, signal-processing board, display communication board.It measures
Principle is：Air speed measuring apparatus use time difference method measuring principle, sound wave in air uplink, downlink propagate same distance when it is used
Time is different, and this time difference and the flowing velocity of tested air have certain mathematical relationship, thus calculate wind speed.
Probe is combined with signal-processing board when specific measurement, is carried out the sampling and processing of signal, is obtained the final time difference, and
Result is conveyed to display communication board, parameter operation is carried out, obtains final wind speed, stored, at the same on a display screen into
Row display, if it is desired, can also real-time Transmission give multi-parameter monitoring system.
Referring to Fig. 6-Figure 14：Signal-processing board is to acquire operation control plate by the data of core of dsp chip.It is main
Function module have power module, ultrasonic wave emit/receive control module, receive signal processing module, programming amplifying module, electricity
Control amplification module, data processing module, communication module, memory module.Controller according to certain logic control a pair pop one's head in into
The transmitting of row ultrasonic signal receives.Controller emits one group of symmetrical pulse signal, is driven by analog line driver, then lead to
It is output to transmitting transducer after the amplification of extra pulse transformer.Signal is received by receiving energy converter, signal amplification, multistage amplification filter
Wave, programming amplifying detection, automatically controlled amplification etc. calculate ultrasonic wave in air into controller by software according to certain algorithm
The time of middle propagation and peak value, and the time is filtered.The acquisition contrary wind time is switched to after having acquired the time with the wind,
With the wind alternately with the contrary wind propagation time.
Referring to Fig. 7：The master chip of the data processing circuit is dsp chip TMS320F28335, for completing each portion
The control and calculating of parallel circuit.It is connected to the crystal oscillator of 32M Hz between 102,104 pins, frequency multiplication is to 150MHz when use, for giving
Each modular circuit provides clock signal.The major function that the circuit module uses has ADC samplings, DMA conversions, SCI communications, I2C
Communication, EPWM, timer etc..
Referring to Fig. 8：The master chip of the memory module is 24LC1025, is powered by power module, 5,6,7 pins point
Not with the 73 of dsp chip, 74,75 pins are connected, and are stored for parameter.
Referring to Fig. 9：The ultrasonic wave transmitting and receiving module is mainly used for realizing the transmitting and reception of ultrasonic signal,
Dsp controller controls the module, and which is in transmission state, which is in reception state, and the pulse signal of transmission passes through this
Emitted again by ultrasonic transducer after the pulse processing of module and pulse transformer, the signal is connect by receiving terminal
It receives.
Referring to Figure 10-Figure 11：The master chip of the reception signal processing circuit and programmable amplifying circuit be OP37AR with
AD603AR mainly carries out multistage amplification, detection, filtering, finally by signal by wrapping to the signal that ultrasonic transducer receives
Network shape is processed into half-wave shape, and the ADC acquisition modules for being sent into dsp chip are acquired.The circuit allow by signal frequency
Rate is 37K HZ or so.
Figure 12 is participated in, the automatically controlled amplifying circuit is controlled by dsp processor, is changed by adjusting the duty ratio of pulse
The gain amplifier of AD603AR, to achieve the purpose that control waveforms amplitude size.
Referring to Figure 13：The master chip of the communicating circuit is the communication module inside ADM2483, with dsp processor
It is connected, and external interface is provided, for realizing signal-processing board and external communication.
Referring to Figure 14：The power module is mainly that each chip on signal-processing board provides power supply power supply function, defeated
Enter voltage 18V, by the conversion of power supply chip, it is possible to provide the multiple voltages such as 15V, 12V, 5V, 3.3V, 1.8V.
Referring to Figure 15：The display communication board is the operation display board using MSP430 series monolithics as core, master
It is logical including power supply processing circuit, processor circuit, reset circuit, liquid crystal display circuit, clock circuit, storage circuit, RS485
Believe circuit.The display communication board carries out calculation process to the collected data of signal-processing board, while also can be with host computer
It is connected, carries out command interaction and long-range monitoring.The working method of air speed measuring apparatus is divided into normal mode of operation and Installation Modes.?
When normal mode of operation, display communication board receives the time data of signal-processing board upload, is calculated using the principle of time difference method
Wind speed is shown by liquid crystal display.In Installation Modes, display communication board receives the signal width of signal-processing board upload
Value, is directly divided to two screens to be shown on liquid crystal display.Display communication board can be connected with host computer, carry out command interaction, and to agreement
Distinguish, store the parameters within the machine, be handed down to signal-processing board when necessary, also can according to the requirement of host computer, in real time on
Pass wind speed or signal amplitude.
Software processing flow is：
(1) initialization of the modules such as system variable, clock, timer, IO, ADC, DMA.
(2) transmitting and reception of the ultrasonic signal of control probe.By each impulse ejection of Timer Controlling starting when
Between, primary transmitting is made of 8 pulses, is started after the primary transmitting of end and is received timing.
(3) after reception timing time arrives, start ADC, to waveform sampling, and close other interruptions.
(4) after completing primary sampling, start DMA transfer, and continue to sample next time.All after the completion of sampling, record
Time since being emitted to conversion, and stop ADC samplings, restore other and interrupt configuration, set finishes receiving mark.
(5) signal propagation time is calculated according to sampled result.The wave crest of reception waveform is judged by particular algorithm first,
It calculates and is emitted to the time for receiving wave crest.Secondly judge waveform, adjusted by software when undesirable and receive signal processing electricity
Road.Again, the unilateral propagation time is filtered to obtain the final propagation time, (when by external interference, such as vehicle
, pedestrian by when, waveform signal can be undesirable, these disturbed signals are filtered out by software, only retain it is effective, such as
This improves anti-interference).
(6) continue to start next pulse transmitting, and exchange emitter-receiver direction is judged whether according to rule, it is so past
It is multiple.
(7) after the propagation time for having acquired side, actively display communication board (host computer) is given to send the time being calculated.
(8) display communication board is according to installation parameter and time, contrary wind time calculation of wind speed with the wind, and is carried out by liquid crystal display
Display.
The step of measurement method of coal mine roadway sectional wind velocity measuring instrument is:
(1) position to install instruments is selected：It is recommended that in straight tunnel, the selection more little ventilation lane (section of horizontal slope
Product is as close as possible).
Referring to Fig. 4：Air speed measuring apparatus is mounted on tunnel both sides, and probe is fixed by fixing device for installing with expansion bolt
At the both ends of air way wall.The installation direction of probe is consistent with wind direction, and probe 1 is in the wind place (UP probes), pops one's head in 2 alee
(DOWN probes).As needed, probe 1 and probe 2 can not be probe 1 and 2 lines of probe in same level height, measurement
The sectional wind velocity at place.
(2) probe spacing setting：Two probes of air speed measuring apparatus are fixed on to the fixing device for installing of air speed measuring apparatus
On probe bracket, two alignment probes are estimated, the centre distance between two probes is measured, which is arranged into air speed measuring apparatus
In.
(3) alignment probe：Air speed measuring apparatus normal work needs two probe height alignments.Method：One can first be fixed
Probe converts the direction of another probe, and observation shows the signal peak of screen display, and peak value is bigger, and that pops one's head in pair is more accurate, when
It when peak value is most strong, remains stationary as, fixes two probes.
(4) installation parameter is determined
Referring to Fig. 5：Direct range, axial distance, the lateral distance for measuring two probes after alignment, for calculating probe
With the angle of wind direction.When the height difference of probe, needs to project in same level and measure.
Direct range：The air line distance of two center probe points；
Axial distance：Probe air line distance corresponds to the projector distance (two distances popped one's head in along wind direction) of tunnel longitudinal direction；
Lateral distance：Probe air line distance correspond to drift section projector distance (two probe verticals in wind direction away from
From)；
(5) parameter setting
By measured probe installation parameter (probe direct range L, lateral distance, axial distance, memory gap, station number
Deng) be arranged into air speed measuring apparatus.
(6) enter normal mode of operation：If instrument is in Installation Modes, it is set to normal mode of operation or disconnected
Electricity is restarted, and air speed measuring apparatus can enter normal mode of operation.
(7) logic control and data operation.
Air speed measuring apparatus controls the transmitting and reception of ultrasonic transducer (probe), and the acoustic signals to receiving carry out
Acquisition, after modulation /demodulation, using signal-processing board 6 data processing module and display board communication board analyzing processing
And calculate, obtain specific wind speed.
First, pass through the transmitting of signal-processing board control probe and reception direction.
The transmitting and reception that the main control chip of signal-processing board is popped one's head according to certain logical rule control a pair, a pair are visited
When head emits at one, another is in reception state, after the propagation time of the side is completed in acquisition, switches the side of sending and receiving
To continuing the propagation time for acquiring the side, and so on.
Secondly, the signal that signal-processing board will receive inputs main control chip by amplification, filtering, shaping etc..
Third, main control chip adjust amplification and detecting circuit according to signal waveform.
4th, main control chip is filtered collected signal, compares, adjusting, seeking the calculation process such as extreme value, calculates
Time and contrary wind time with the wind.
Referring to Fig. 4：L is ultrasonic wave path, that is, distance between popping one's head in, and C is the velocity of sound, and α is between the direction and wind speed of probe
Angle (being calculated by installation parameter).
The downwind delivery time is：
The upwind delivery time is：
5th, the obtained time with the wind is reported to display communication board to signal-processing board with the contrary wind time or other are upper
Machine.
6th, wind speed V is calculated according to time difference method and installation parameter in display communication board, is shown by liquid crystal.Meter
Calculating formula is：
(8) multi-parameter monitoring system is accessed：Using signal wire connection air speed measuring apparatus and multi-parameter monitoring system, wind speed is surveyed
Collected data are uploaded to multi-parameter monitoring system software by amount instrument, and user can see at the real time data interface of the software
To the real time information of wind speed, remotely monitor is realized.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (5)
1. a kind of coal mine roadway sectional wind velocity measuring instrument, it is characterised in that：Including host framework and 2 probes (4), the spy
Head (4) is connect by signal wire with host framework；
The host framework includes upper cover (1) and lower casing (5), and the upper cover (1) is connected on lower casing (5), and described is upper
It is provided with liquid crystal display (3) on lid (1), signal-processing board (6), circuit fixed plate (7) and display are provided in host framework
Communication board (8), the circuit fixed plate (7) are fixed on lower casing (5), and signal-processing board (6) connects with circuit fixed plate (7)
It connects, display communication board (8) is connect with liquid crystal display (3), is shown for data；
The probe (4) be ultrasonic transducer, connect with signal-processing board (6) by signal wire, signal-processing board (6) and
Show that communication board (8) is connected.
2. a kind of coal mine roadway sectional wind velocity measuring instrument according to claim 1, it is characterised in that：Each probe (4) is logical
Fixing device for installing is crossed to be fixed；
The structure of fixing device for installing includes bearing (9), bracket at corner and probe bracket (12), and the bracket at corner includes turning
Angle support one (10) and bracket at corner two (11), the bracket at corner one (10) and bracket at corner two (11) are relatively set into square
Shape frame, the bracket at corner one (10) are connected by screw with bearing (9), and bracket at corner two (11) is logical with probe bracket (12)
Screw connection is crossed, probe (4) is connect by fixing nut (13) with probe bracket (12).
3. a kind of coal mine roadway sectional wind velocity measuring instrument according to claim 1 or 2, it is characterised in that：The corner
Holder one (10) is inverse u shape, and semi-circular groove is respectively arranged on two sides；The bracket at corner two (11) is U-typed,
Thirdly being respectively arranged with semi-circular groove on side；Screw and bracket at corner two are provided in the semi-circular groove of bracket at corner one (10)
(11) it connects, be provided with screw in the semi-circular groove of bracket at corner two (11) connect with bracket at corner one (10), the corner
Screw is provided in the semi-circular groove of holder one (10) bottom to connect with bearing (9).
4. a kind of measurement method of coal mine roadway sectional wind velocity measuring instrument according to claim 1, it is characterised in that：It is described
Measuring process include：
1) coal mine roadway sectional wind velocity measuring instrument is mounted on straight tunnel, the ventilation lane for selecting horizontal slope little；
2) probe spacing setting：Two probes of air speed measuring apparatus are fixed on the fixing device for installing of air speed measuring apparatus, mesh
Two alignment probes are surveyed, the centre distance between two probes is measured, which is arranged into air speed measuring apparatus；
3) alignment probe：By two of air speed measuring apparatus height alignments of popping one's head in；
Alignment methods are：A probe is first fixed, the direction of another probe is converted, observation shows the signal peak of screen display
Value, peak value is bigger, and that pops one's head in pair is more accurate, when peak value is most strong, remains stationary as, fixes two probes；
4) installation parameter is determined
Direct range, axial distance, the lateral distance for measuring the central point of two probes after alignment, for calculating probe and wind
To angle；
5) parameter setting
By institute probing head direct range L, lateral distance, axial distance, memory gap, station number are arranged into air speed measuring apparatus；
6) enter normal mode of operation
If instrument is in Installation Modes, it is set to normal mode of operation or power-off restarting, air speed measuring apparatus can
Into normal mode of operation；
7) logic control and data operation.
The transmitting and reception of air speed measuring apparatus control probe, and the acoustic signals received are acquired, by modulation /demodulation
Later, using the analyzing processing and calculating of the data processing module of signal-processing board (6) and display communication board, specific wind is obtained
Speed.
5. a kind of measurement method of coal mine roadway sectional wind velocity measuring instrument according to claim 4, it is characterised in that：It is described
The detailed process of step 7) be：
First, pass through the transmitting of signal-processing board control probe and reception direction；
The transmitting and reception of a pair of of probe of main control chip control of signal-processing board, when a pair of probe emits at one, another
In reception state, after the propagation time of the side is completed in acquisition, switching sends and receives direction, continues the propagation for acquiring the side
Time, and so on；
Secondly, the signal that signal-processing board will receive inputs main control chip by amplification, filtering, shaping etc.；
Third, main control chip adjust amplification and detecting circuit according to signal waveform；
4th, main control chip is filtered collected signal, compares, adjusting, seeking the calculation process such as extreme value, calculates with the wind
Time and contrary wind time.
L is ultrasonic wave path, that is, distance between popping one's head in, and C is the velocity of sound, and α is the angle between the direction and wind speed of probe, by installing
Parameter is calculated.
The downwind delivery time is：
The upwind delivery time is：
5th, obtained time with the wind and contrary wind time are reported to display communication board or other host computers by signal-processing board.
6th, wind speed V is calculated according to time difference method and installation parameter in display communication board, is shown by liquid crystal.It calculates public
Formula is：
(8) multi-parameter monitoring system is accessed：Use signal wire connection air speed measuring apparatus and multi-parameter monitoring system, air speed measuring apparatus
Collected data are uploaded into multi-parameter monitoring system software, user is at the real time data interface of the software it is seen that wind
Remotely monitor is realized in the real time information of speed.
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| CN116557032A (en) * | 2023-05-24 | 2023-08-08 | 北京龙软科技股份有限公司 | Mine roadway section wind speed monitoring device and section wind speed monitoring method |
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