CN107942092A - Low wind speed measuring device and method in mine laneway large span - Google Patents
Low wind speed measuring device and method in mine laneway large span Download PDFInfo
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- CN107942092A CN107942092A CN201711247874.7A CN201711247874A CN107942092A CN 107942092 A CN107942092 A CN 107942092A CN 201711247874 A CN201711247874 A CN 201711247874A CN 107942092 A CN107942092 A CN 107942092A
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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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Abstract
The present invention proposes low wind speed measuring device and method in a kind of mine laneway large span, first sensor is flexibly connected the first fixed seat, and the first ultrasonic wave transmitting probe, the first ultrasonic wave receiving transducer, infrared emitting module and infrared receiver module are set on first sensor；Second sensor is flexibly connected the second fixed seat, sets the second ultrasonic wave transmitting probe, the second ultrasonic wave receiving transducer and infrared reflection mirror in second sensor, identified areas is set out on infrared reflection mirror；Main control unit signal connects logic control element, logic control element connects the first ultrasonic wave transmitting probe, the second ultrasonic wave transmitting probe through ultrasonic wave transmitting circuit, logic control element connects the first ultrasonic wave receiving transducer, the second ultrasonic wave receiving transducer, main control unit signal connection infrared emitting module and infrared receiver module through A/D converter, programmable amplifier.Beneficial effects of the present invention：Accurate survey calculation goes out low wind speed in mine laneway large span.
Description
Technical field
The present invention relates to ultrasonic wind speed field of measuring technique, more particularly to low wind speed in a kind of mine laneway large span
Measuring device and method.
Background technology
Rationally reliable ventilating system is the guarantee of downhole safety production.Research for underground wind flow field can be targeted
Prevent the methane accumulation caused by there are low airflow velocity region, so as to play key in the measure of pre- gas prevention class accident
Effect, fast and accurately judges that underground causes the specified place in the distinguished and admirable specific tunnel and tunnel for occurring fluctuating, is fast
Speed solves the key of ventilating problem, has important practical significance.Just for monitoring with very big in some special measuring points
Limitation, it is impossible to which the effectively air current state of prediction zone of ignorance, this is that measuring instrument and monitoring are counted out continuous improvement in recent years
While the most important reason that still happens occasionally of gas accident.Specifically, the wind speed that a distinguished and admirable test point is tested is simultaneously
The wind speed profile situation of accurate representation point place section is unable to, only measures ability for airflow velocity distribution in tunnel
Accumulation for correct prevention toxic and harmful gas and dust provides guidance.Low airflow velocity region inter-road is necessarily involved among these
The accurate measurement problem of the measuring wind speed problem of road section, particularly wind speed in 0~0.15m/s scopes.
Measuring wind speed, common instrument have cup-shaped airspeedometer, wing airspeedometer, temperature-sensitive airspeedometer and ultrasonic wind speed meter.
Cup-shaped airspeedometer and wing airspeedometer are easy to use, but its inertia and mechanical friction resistance are larger, are suitable only for measuring larger
Wind speed.Temperature-sensitive airspeedometer utilizes thermosensitive probe, its operation principle is the heat taken away based on cold shock gas on thermal element, by
One adjusts Katyuan device and keeps constant temperature, adjusts electric current at this time and flow velocity is directly proportional.This measuring method needs artificial
Intervene, and this instrument in turbulent flow in use, the air-flow from all directions impacts thermal element at the same time, environmental condition (temperature,
Humidity) change can all influence the accuracy of measurement result.Ultrasonic wave can be used for measuring wind speed, be because in ultrasonic propagation
During, distinguished and admirable flow rate information can be loaded, these information pass through separating treatment, can obtain distinguished and admirable flow velocity.At present, ore deposit
Have two in respect of vortex airspeedometer and time difference type airspeedometer, existing main problem with ultrasonic wind speed：First, a survey, only reflects
Wind speed at measuring point, it is impossible to reflect the mean wind speed of drift section, it is under-represented；Second, surveyed when wind speed is less than 0.15m/s
Accuracy of measurement is difficult to meet the requirements.
The content of the invention
It is an object of the invention to provide low wind speed measuring device and method in a kind of mine laneway large span, solves current
To the problem of low measuring wind speed is inaccurate in mine laneway large span.
The present invention provides low wind speed measuring device in a kind of mine laneway large span, including first sensor, the second sensing
Device, logic control element and main control unit；First sensor is connected with the first fixed seat, and is provided with first sensor
One ultrasonic wave transmitting probe, the first ultrasonic wave receiving transducer, infrared emitting module and infrared receiver module, the first ultrasonic wave
Transmitting probe, the first ultrasonic wave receiving transducer, infrared emitting module and infrared receiver module are located at the same of first sensor
At one position；Second sensor is connected with the second fixed seat, be provided with second sensor the second ultrasonic wave transmitting probe,
Second ultrasonic wave receiving transducer and infrared reflection mirror, identified areas, the transmitting of the second ultrasonic wave are set out on infrared reflection mirror
Probe, the second ultrasonic wave receiving transducer and infrared reflection mirror are located at the same position of second sensor；Main control unit signal
Logic control element is connected, logic control element connects the first ultrasonic wave transmitting probe, the second ultrasound through ultrasonic wave transmitting circuit
Ripple transmitting probe, logic control element connect the first ultrasonic wave receiving transducer, the second ultrasound through A/D converter, programmable amplifier
Ripple receiving transducer, main control unit signal connection infrared emitting module and infrared receiver module.
Further, the direction of the first ultrasonic wave transmitting probe transmitting ultrasonic wave, the first ultrasonic wave receiving transducer, which receive, surpasses
The direction in the direction of sound wave, the direction of infrared emitting module transmitting infrared ray and infrared receiver module receiving infrared-ray is mutual
It is parallel, the second ultrasonic wave transmitting probe transmitting direction of ultrasonic wave, the second ultrasonic wave receiving transducer receive ultrasonic wave direction and
The mirror normal direction of infrared reflection mirror is parallel to each other.
Further, the main control unit is computer.
Further, the logic control element is microcontroller.
Further, main control unit is connected with monitoring unit through D/A converter, V/f transducer signals successively.
Further, the monitoring unit is Mine Monitoring and Control System underground substation, main control unit successively through D/A converter,
V/f converters, RS485 rs 232 serial interface signals connection Mine Monitoring and Control System underground substation.
Further, first sensor connects the first fixed seat through spherical linkage, and second sensor is connected through spherical linkage
Second fixed seat.
The present invention also provides low wind measurement method in a kind of mine laneway large span, using above-mentioned mine laneway greatly across
Low wind speed measuring device, comprises the following steps in degree：
Step 1: first sensor and second sensor are respectively arranged apart from both ends compared with large span along tunnel axis, the
One sensor is fixed on a gang of of tunnel through the first fixed seat, and second sensor is fixed on the another of tunnel through the second fixed seat
The line of side, first sensor and second sensor tiltedly wears tunnel；
Step 2: define the infrared ray that infrared emitting module is launched reflexes to infrared receiver through infrared reflection mirror
Module forms infrared transmission path, defines the first ultrasonic wave transmitting probe and launches ultrasonic wave to the second ultrasonic wave receiving transducer
The first ultrasonic transmission path is formed, the second ultrasonic wave transmitting probe is defined and launches ultrasonic wave to the first ultrasonic wave receiving transducer
Form the second ultrasonic transmission path, start low wind speed measuring device in mine laneway large span, adjust first sensor and the
The direction of two sensors, the identified areas for the infrared alignment infrared reflection mirror that infrared emitting module is launched, makes infrared ray
Transmission path, the first ultrasonic transmission path are parallel with the second ultrasonic transmission path；
Step 3: launching infrared ray by main control unit control infrared emitting module, infrared ray is through infrared reflection mirror
Infrared receiver module is reflexed to, calculating the distance between infrared emitting module and infrared reflection mirror by main control unit is
L, then the distance between the first ultrasonic wave transmitting probe and the second ultrasonic wave receiving transducer are also L, the second ultrasonic wave transmitting probe
The distance between first ultrasonic wave receiving transducer is also L；
Step 4: triggering ultrasonic wave transmitting circuit through logic control element by main control unit produces high-voltage pulse, high-tension pulse
Impulse encourages the first ultrasonic wave transmitting probe transmitting ultrasonic wave, and main control unit is synchronous to be adopted through logic control element triggering A/D converter
Collect the ultrasonic signal from the second ultrasonic wave receiving transducer, main control unit record is by the first ultrasonic wave transmitting probe to the second surpassing
The transmission time t of acoustic receiver Probe Ultrasonic Searching ripple12；
Step 5: triggering ultrasonic wave transmitting circuit through logic control element by main control unit produces high-voltage pulse, high-tension pulse
Impulse encourages the second ultrasonic wave transmitting probe transmitting ultrasonic wave, and main control unit is synchronous to be adopted through logic control element triggering A/D converter
Collect the ultrasonic signal from the first ultrasonic wave receiving transducer, main control unit record is by the second ultrasonic wave transmitting probe to the first surpassing
The transmission time t of acoustic receiver Probe Ultrasonic Searching ripple21；
Step 6: first sensor and the line of second sensor and tunnel axis angle are α, ultrasonic wave in the air of tunnel
Transmission speed be C, wind speed v in tunnel is calculated in main control unit, and calculation formula is as follows：
There are formula (1) and (2) to obtain,
Further, in step 1, first sensor and the are respectively arranged apart from both ends not less than 5m along tunnel axis
Two sensors.
Further, step 7 is further included, is sent out wind speed v by D/A converter, V/f converters by main control unit control
Send to monitoring unit.
Compared with prior art, low wind speed measuring device and method have following spy in mine laneway large span of the invention
Point and advantage：
The present invention mine laneway large span in low wind speed measuring device and method, realize sensor pair be accurately positioned and
Precision ranging between sensor pair, the accurate ultrasonic wave that records are calculated in the transmission time with contrary wind state with the wind, accurate meter
Low wind speed in mine laneway large span, completely eliminates influence of the mine laneway changes in environmental conditions to measuring wind speed result.
After the embodiment of the present invention is read in conjunction with the figure, the features and advantages of the invention will become clearer.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is that first sensor, second sense in low wind speed measuring device in mine laneway large span of the embodiment of the present invention
Device is arranged in the schematic diagram in tunnel；
Fig. 2 is the structure diagram of low wind speed measuring device in mine laneway large span of the embodiment of the present invention；
Wherein, 1, first sensor, 2, second sensor, 3, spherical linkage, 4, tunnel.
Embodiment
As shown in Figure 1 and Figure 2, the present embodiment provides low wind speed measuring device in a kind of mine laneway large span, including first
Sensor 1, second sensor 2, logic control element and main control unit etc..In the present embodiment, logic control element is microcontroller,
Main control unit is computer.
First sensor 1 is connected with the first fixed seat through spherical linkage 3, and the first ultrasonic wave is provided with first sensor 1
Transmitting probe, the first ultrasonic wave receiving transducer, infrared emitting module and infrared receiver module, the transmitting of the first ultrasonic wave are visited
Head, the first ultrasonic wave receiving transducer, infrared emitting module and infrared receiver module are located at the same position of first sensor 1
Place.Specifically, the direction of the first ultrasonic wave transmitting probe transmitting ultrasonic wave, the first ultrasonic wave receiving transducer can be made to receive ultrasound
The direction of ripple, the direction of infrared emitting module transmitting infrared ray and the direction of infrared receiver module receiving infrared-ray are mutually equal
OK.
Second sensor 2 is connected with the second fixed seat through spherical linkage 3, and the second ultrasonic wave is provided with second sensor 2
Transmitting probe, the second ultrasonic wave receiving transducer and infrared reflection mirror, set out identified areas on infrared reflection mirror, the second surpass
Sound wave transmitting probe, the second ultrasonic wave receiving transducer and infrared reflection mirror are located at the same position of second sensor 2.Specifically
, the direction of the second ultrasonic wave transmitting probe transmitting ultrasonic wave, the second ultrasonic wave receiving transducer can be made to receive the side of ultrasonic wave
To parallel to each other with the mirror normal direction of infrared reflection mirror.
Computer signal connects microcontroller, and microcontroller connects the first ultrasonic wave transmitting probe, the through ultrasonic wave transmitting circuit
Two ultrasonic wave transmitting probes, microcontroller connect the first ultrasonic wave receiving transducer, the second ultrasound through A/D converter, programmable amplifier
Ripple receiving transducer, Computer signal connection infrared emitting module and infrared receiver module, computer are changed through D/A successively
Device, V/f converters, RS485 rs 232 serial interface signals connection Mine Monitoring and Control System underground substation.
The present embodiment also provides low wind measurement method in a kind of mine laneway large span, is realized by infrared ray positioning big
Span measuring wind speed, it is 4 a wide range of mean wind speed of tunnel to survey wind speed, and the air quantity calculated according to mean wind speed is more accurate.
Measurement accuracy will be significantly improved compared with small distance point is surveyed, this is because in the case where time measurement error is identical, distance is got over
The air speed error calculated greatly is smaller.
Low wind measurement method in a kind of mine laneway large span of the present embodiment, using above-mentioned mine laneway large span
In low wind speed measuring device, comprise the following steps：
Step 1: the arrangement of sensor pair
First sensor 1 and second sensor 2 are respectively arranged apart from both ends not less than 5m along 4 axis of tunnel, first passes
Sensor 1 is fixed on a gang of of tunnel 4 through the first fixed seat, and second sensor 2 is fixed on the another of tunnel 4 through the second fixed seat
The line of side, first sensor 1 and second sensor 2 tiltedly wears tunnel 4.
Step 2: infrared positioning
Define the infrared ray that infrared emitting module is launched and reflex to infrared receiver module shape through infrared reflection mirror
Into infrared transmission path, define the first ultrasonic wave transmitting probe and launch ultrasonic wave to the second ultrasonic wave receiving transducer and form the
One ultrasonic transmission path, defines the second ultrasonic wave transmitting probe and launches ultrasonic wave to the first ultrasonic wave receiving transducer and form the
Two ultrasonic transmission paths, start low wind speed measuring device in mine laneway large span, and first sensor 1 is adjusted through spherical linkage 3
The direction of first sensor 1 is saved, second sensor 2 adjusts the direction of second sensor 2 through spherical linkage 3, makes infrared emitting
The identified areas for the infrared alignment infrared reflection mirror that module is launched, makes infrared transmission path, the first ultrasonic transmission road
Footpath is parallel with the second ultrasonic transmission path, realizes sensor to being accurately positioned.
It should be noted that since the two of tunnel 4 helps easily to deform, then two the first interior fixed seat, second is helped to fix
Seat is easily shifted over, and causes first sensor 1, the direction of second sensor 2 to shift.First sensor 1, second sensor
2 direction shifts, and ultrasonic wave transmitting probe, ultrasonic wave receiving transducer will be caused also to cause infrared ray towards misplacing
Transmitting module, infrared receiver module and the direction of infrared reflection mirror misplace.
If towards misplacing, follow-up ultrasonic wave transmitting probe is launched for ultrasonic wave transmitting probe, ultrasonic wave receiving transducer
Ultrasonic wave and ultrasonic wave receiving transducer receive ultrasonic wave and can misplace, then the propagation path of ultrasonic wave shifts, and receive
It is probably the ripple through surrounding objects reflection, diffraction that probe, which receives ultrasonic wave, and the ultrasonic wave that ultrasonic wave receiving transducer receives is believed
It is number second-rate, t when will cause the subsequent error measurement downwind ultrasonic wave to walk12, upwind ultrasonic wave t when walking21。
If infrared emitting module, infrared receiver module and the direction of infrared reflection mirror misplace, follow-up
In infrared distance measurement, the distance between infrared emitting module and infrared reflection mirror (infrared receiver module and infrared reflection
The distance between mirror) it is not equivalent to the distance between the first ultrasonic wave transmitting probe and the second ultrasonic wave receiving transducer, second
The distance between ultrasonic wave transmitting probe and the first ultrasonic wave receiving transducer, cause infrared distance measurement mistake.
At this time, it is only necessary to which survey crew adjusts the direction of second sensor 2 through spherical linkage 3, and the is adjusted through spherical linkage 3
The direction of one sensor 1, makes the infrared ray that infrared emitting module is launched be directed at infrared reflection mirror in second sensor 2
Identified areas, you can t when realization is accurately positioned and is walked for follow-up precision ranging, accurate measurement downwind ultrasonic wave12, it is inverse
T when wind direction ultrasonic wave is walked21Provide safeguard.
Step 3: infrared distance measurement
Infrared ray is launched by computer control infrared emitting module, infrared ray reflexes to infrared through infrared reflection mirror
Line receiving module, it is L to calculate the distance between infrared emitting module and infrared reflection mirror by computer, then the first ultrasound
The distance between ripple transmitting probe and the second ultrasonic wave receiving transducer are also L, the second ultrasonic wave transmitting probe and the first ultrasonic wave
The distance between receiving transducer is also L, and distance L is uploaded to computer storage.
Step 4: when downwind ultrasonic wave is walked
Ultrasonic wave transmitting circuit being triggered through microcontroller by computer and producing high-voltage pulse, high-voltage pulse encourages the first ultrasonic wave
Transmitting probe launches powerful ultrasonic wave, and computer is synchronous to come from the second ultrasonic wave through microcontroller triggering A/D converter collection
The ultrasonic signal of receiving transducer, wherein, the ultrasonic signal of the second ultrasonic wave receiving transducer passes through the conditioning of programmable amplifier,
By signal handler control A/D converter identification preliminary wave, realize that high-frequency data samples, computer extraction, record by first
Ultrasonic wave transmitting probe to the second ultrasonic wave receiving transducer ultrasonic wave transmission time t12。
Step 5: when upwind ultrasonic wave is walked
Ultrasonic wave transmitting circuit being triggered through microcontroller by computer and producing high-voltage pulse, high-voltage pulse encourages the second ultrasonic wave
Transmitting probe launches powerful ultrasonic wave, and computer is synchronous to come from the first ultrasonic wave through microcontroller triggering A/D converter collection
The ultrasonic signal of receiving transducer, wherein, the ultrasonic signal of the first ultrasonic wave receiving transducer passes through the conditioning of programmable amplifier,
By signal handler control A/D converter identification preliminary wave, realize that high-frequency data samples, computer extraction, record by second
Ultrasonic wave transmitting probe to the first ultrasonic wave receiving transducer ultrasonic wave transmission time t21。
Step 6: accurate calculate
First sensor 1 and the line of second sensor 2 and 4 axis angle of tunnel are α, ultrasonic wave in 4 air of tunnel
Transmission speed is C, and wind speed v in tunnel 4 is calculated in computer, the Doppler effect according to wind speed v to ultrasonic wave, calculation formula
It is as follows：
There are formula (1) and (2) to obtain,
Above-mentioned calculating, for the ultrasonic signal of arrowband, eliminates the influence of the transmission speed C of ultrasonic wave, is tested wind speed v
Only with distance L, concurrent-countercurrent propagation time t12And t21It is related, as long as thus accurately measuring L, t12、t21, can accurately try to achieve and work as
Preceding tested wind speed v, completely eliminates the influence of environmental condition in tunnel 4 (such as temperature, humidity, dust).
Step 7: Communication Monitoring
Controlled by computer, wind speed v exports 0-5V digital signals by I/O interfaces, and 0-5V moulds are transformed to by D/A converter
Intend signal, 200-1000Hz frequency signals are converted to by V/f converters again, finally sent by RS485 serial ports to Mine Monitoring system
System underground substation, the real time monitoring to wind speed v is realized by ground maneuvers room.
Low wind speed measuring device in mine laneway large span in the present embodiment, applied to low wind speed in the large span of tunnel
Measurement, it is possible to achieve the precision ranging being accurately positioned between sensor pair of sensor pair, it is accurate record ultrasonic wave with the wind and
The transmission time of contrary wind state, accurate survey calculation go out low wind speed in 4 large span of mine laneway, completely eliminate mine laneway
Influence of 4 changes in environmental conditions to measuring wind speed result.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention, should also belong to the present invention's
Protection domain.
Claims (10)
- A kind of 1. low wind speed measuring device in mine laneway large span, it is characterised in that：Including first sensor, the second sensing Device, logic control element and main control unit；First sensor is connected with the first fixed seat, and is provided with first sensor One ultrasonic wave transmitting probe, the first ultrasonic wave receiving transducer, infrared emitting module and infrared receiver module, the first ultrasonic wave Transmitting probe, the first ultrasonic wave receiving transducer, infrared emitting module and infrared receiver module are located at the same of first sensor At one position；Second sensor is connected with the second fixed seat, be provided with second sensor the second ultrasonic wave transmitting probe, Second ultrasonic wave receiving transducer and infrared reflection mirror, identified areas, the transmitting of the second ultrasonic wave are set out on infrared reflection mirror Probe, the second ultrasonic wave receiving transducer and infrared reflection mirror are located at the same position of second sensor；Main control unit signal Logic control element is connected, logic control element connects the first ultrasonic wave transmitting probe, the second ultrasound through ultrasonic wave transmitting circuit Ripple transmitting probe, logic control element connect the first ultrasonic wave receiving transducer, the second ultrasound through A/D converter, programmable amplifier Ripple receiving transducer, main control unit signal connection infrared emitting module and infrared receiver module.
- 2. low wind speed measuring device in mine laneway large span according to claim 1, it is characterised in that：First ultrasonic wave The direction of transmitting probe transmitting ultrasonic wave, the first ultrasonic wave receiving transducer receive the direction of ultrasonic wave, infrared emitting module hair Penetrate infrared ray direction and infrared receiver module receiving infrared-ray direction it is parallel to each other, the second ultrasonic wave transmitting probe transmitting The mirror normal direction in the direction of ultrasonic wave, the direction of the second ultrasonic wave receiving transducer reception ultrasonic wave and infrared reflection mirror is mutual It is parallel.
- 3. low wind speed measuring device in mine laneway large span according to claim 1, it is characterised in that：The master control list Member is computer.
- 4. low wind speed measuring device in mine laneway large span according to claim 1, it is characterised in that：The logic control Unit processed is microcontroller.
- 5. low wind speed measuring device in mine laneway large span according to claim 1, it is characterised in that：Main control unit according to It is secondary to be connected with monitoring unit through D/A converter, V/f transducer signals.
- 6. low wind speed measuring device in mine laneway large span according to claim 5, it is characterised in that：The monitoring is single Member is Mine Monitoring and Control System underground substation, and main control unit is connected through D/A converter, V/f converters, RS485 rs 232 serial interface signals successively Mine Monitoring and Control System underground substation.
- 7. low wind speed measuring device in mine laneway large span according to claim 1, it is characterised in that：First sensor The first fixed seat is connected through spherical linkage, second sensor connects the second fixed seat through spherical linkage.
- A kind of 8. low wind measurement method in mine laneway large span, using claim 1 to 7 any one of them mine laneway Low wind speed measuring device in large span, it is characterised in that comprise the following steps：Step 1: being respectively arranged first sensor and second sensor apart from both ends compared with large span along tunnel axis, first passes Sensor is fixed on a gang of of tunnel through the first fixed seat, and second sensor is fixed on another side in tunnel through the second fixed seat, the One sensor and the line of second sensor tiltedly wear tunnel；Step 2: define the infrared ray that infrared emitting module is launched reflexes to infrared receiver module through infrared reflection mirror Infrared transmission path is formed, the first ultrasonic wave transmitting probe of definition is launched ultrasonic wave to the second ultrasonic wave receiving transducer and formed First ultrasonic transmission path, the second ultrasonic wave transmitting probe of definition are launched ultrasonic wave to the first ultrasonic wave receiving transducer and are formed Second ultrasonic transmission path, starts low wind speed measuring device in mine laneway large span, adjusts first sensor and second and passes The direction of sensor, the identified areas for the infrared alignment infrared reflection mirror that infrared emitting module is launched, makes infrared transmission Path, the first ultrasonic transmission path are parallel with the second ultrasonic transmission path；Step 3: launching infrared ray by main control unit control infrared emitting module, infrared ray is reflected through infrared reflection mirror To infrared receiver module, it is L to calculate the distance between infrared emitting module and infrared reflection mirror by main control unit, then The distance between first ultrasonic wave transmitting probe and the second ultrasonic wave receiving transducer are also L, the second ultrasonic wave transmitting probe and The distance between one ultrasonic wave receiving transducer is also L；Step 4: triggering ultrasonic wave transmitting circuit through logic control element by main control unit produces high-voltage pulse, high-tension pulse impulse The first ultrasonic wave transmitting probe transmitting ultrasonic wave is encouraged, main control unit is synchronous to be come through logic control element triggering A/D converter collection From the ultrasonic signal of the second ultrasonic wave receiving transducer, main control unit is recorded by the first ultrasonic wave transmitting probe to the second ultrasonic wave The transmission time t of receiving transducer ultrasonic wave12；Step 5: triggering ultrasonic wave transmitting circuit through logic control element by main control unit produces high-voltage pulse, high-tension pulse impulse The second ultrasonic wave transmitting probe transmitting ultrasonic wave is encouraged, main control unit is synchronous to be come through logic control element triggering A/D converter collection From the ultrasonic signal of the first ultrasonic wave receiving transducer, main control unit is recorded by the second ultrasonic wave transmitting probe to the first ultrasonic wave The transmission time t of receiving transducer ultrasonic wave21；Step 6: first sensor and the line of second sensor and tunnel axis angle are α, the biography of ultrasonic wave in the air of tunnel Defeated speed is C, and wind speed v in tunnel is calculated in main control unit, and calculation formula is as follows：<mrow> <mfrac> <mi>L</mi> <msub> <mi>t</mi> <mn>12</mn> </msub> </mfrac> <mo>=</mo> <mi>C</mi> <mo>+</mo> <mi>v</mi> <mi> </mi> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mi>&alpha;</mi> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow><mrow> <mfrac> <mi>L</mi> <msub> <mi>t</mi> <mn>21</mn> </msub> </mfrac> <mo>=</mo> <mi>C</mi> <mo>-</mo> <mi>v</mi> <mi> </mi> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mi>&alpha;</mi> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>There are formula (1) and (2) to obtain,<mrow> <mi>v</mi> <mo>=</mo> <mfrac> <mi>L</mi> <mrow> <mn>2</mn> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mi>&alpha;</mi> </mrow> </mfrac> <mo>&CenterDot;</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>t</mi> <mn>12</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>t</mi> <mn>21</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> <mo>.</mo> </mrow>
- 9. low wind measurement method in mine laneway large span according to claim 8, it is characterised in that：In step 1, Along tunnel axis first sensor and second sensor are respectively arranged apart from both ends not less than 5m.
- 10. low wind measurement method in mine laneway large span according to claim 8, it is characterised in that：Further include step Rapid seven, controlled by main control unit and send wind speed v to monitoring unit by D/A converter, V/f converters.
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Cited By (5)
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| CN111693731A (en) * | 2020-06-23 | 2020-09-22 | 中煤科工集团重庆研究院有限公司 | Roadway section wind speed measuring device and method based on ultrasonic principle |
| CN112198336A (en) * | 2020-06-28 | 2021-01-08 | 西安天牧仪器仪表有限公司 | Measuring method of anemometer |
| CN112377260A (en) * | 2020-10-22 | 2021-02-19 | 中国矿业大学 | Roadway full-section air quantity measuring system and method |
| CN113092814A (en) * | 2021-03-16 | 2021-07-09 | 山东科技大学 | High-precision air flow measuring method for mine roadway |
| 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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