CN203443971U - Intrinsic safety type supersonic wave speed measurement probe used for mining - Google Patents
Intrinsic safety type supersonic wave speed measurement probe used for mining Download PDFInfo
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- CN203443971U CN203443971U CN201320561358.2U CN201320561358U CN203443971U CN 203443971 U CN203443971 U CN 203443971U CN 201320561358 U CN201320561358 U CN 201320561358U CN 203443971 U CN203443971 U CN 203443971U
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- intrinsic safety
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- eddy current
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Abstract
The utility model provides an intrinsic safety type supersonic wave speed measurement probe used for mining, and belongs to the technical field of instruments and meters in an analysis and measurement control technology. The intrinsic safety type supersonic wave speed measurement probe comprises a bottom plate, a top plate which is corresponding to the bottom plate, side plates which are arranged between the bottom plate and top plate and fixed on two sides, and an eddy current generator. The centers of the two side plates are provided with oscillation wafers, and the two oscillation wafers are arranged on a same central transverse axis. The eddy current generator is arranged on the central vertical axis of the bottom plate and the top plate and arranged below the central transverse axis. The eddy current generator is a cylinder with diameter of 6mm. An inclined angle between the two side plates is from 9 to 12 degrees. The intrinsic safety type supersonic wave speed measurement probe is high in anti-interference performance, large in measurement range, high in measurement accuracy, great in stability and long in alignment calibration period.
Description
Technical field
The utility model belongs to the technology of instrument and meter field in analysis and survey control technology, relates in particular to a kind of ultrasonic wind speed probe.
Background technology
The principle of work of ultrasonic wind speed probe is according to Karman vortex joint opinion (as Fig. 1), in without gauge flow field during the vertical non-linear resistance body that inserts an endless (resistance body claims swirl generating body), in certain reynolds number range (Red=200～5*10000), resistance body downstream can produce that two rows replace, the vortex of inward turning row, and its vortex rate is proportional to flow velocity, formula represents:
f=St?V/d
In formula: f---vortex frequency St-constant (the Si Telahaer scope of counting is 0.21)
V---wind speed d---swirl generating body wire diameter
Therefore, as long as measure f, just can know wind speed V, the wind speed of measuring so is just summed up as measurement vortex frequency, and ultrasound wave air flow sensor utilizes the principle that ultrasound wave is modulated by vortex to measure vortex frequency.
As shown in Figure 2: A, B are the sound head that a pair of performance is identical or close, A is transmitting sound head, B is for receiving sound head, C is swirl generating body, the ultrasound wave of a branch of continuous constant amplitude of A transmitting, it is received that ultrasound wave arrives opposite through air, and when not having vortex to pass through ultrasonic beam (A in as Fig. 2), B receives the ultrasonic signal of continuous constant amplitude.When vortex and ultrasound wave are collided, internal pressure gradient because of swirling motion generation, make the acoustic energy of the vortex that passes through be refracted and reflect, the ultrasonic beam amplitude that result B receives just reduces (as B in Fig. 2), at bumpy flow, cross after ultrasonic beam, and before next vortex do not arrive, ultrasound wave restores to the original state immediately, B just receives the ultrasonic beam of original amplitude.Therefore,, as long as have a vortex by ultrasonic beam, ultrasound wave is just once modulated.By vortex, have how many, ultrasound wave is with regard to modulated how many times, so the vortex frequency f that the modulating frequency of ultrasonic beam is exactly for we will be measured.
Under coal mine, the reliability service of ventilating system and automatic monitoring are the important leverages of guaranteeing Safety of Coal Mine Production, each tunnel, down-hole and workplace must guarantee the wind speed and the air quantity that keep certain, the harmful gas of guarantee down-hole does not gather and is discharged in time, and this just needs under continuous continual gage well wind speed and air quantity everywhere.Domestic main employing ultrasonic wind speed sensor is measured wind speed at present.The problem such as existing ultrasonic wind speed sensor exists that interference free performance is poor, measurement range is little, measuring accuracy is low, poor stability, calibration cycle are short, can not adapt to the requirement that under coal mine, rugged surroundings are worked reliably and with long-term completely.The probe working point of prior art can not be fixed on tuning-points, causes the oscillation frequency of oscillation chip unstable, and amplitude is less, causes the vortex frequency waveform distortion after demodulation larger, and vortex frequency stability is poor, and measured deviation is very large, and measurement accuracy is lower.
Summary of the invention
The utility model is for the deficiencies in the prior art, provides that a kind of interference free performance is high, measurement range is large, measuring accuracy is high, good stability, long mining intrinsic safety type ultrasound wave of calibration cycle test the speed probe.
Key problem in technology of the present utility model has been to design the substantially parallel structure of sound head face allowing in the distinguished and admirable swirling motion direction producing through swirl generating body and probe, adjust the angle of side plate and eddy current generation body, the probe working point of this structure can be fixed on tuning-points, at this moment the oscillation frequency of oscillation chip is the most stable, and amplitude is also maximum.Amplitude after this structure vortex of while is modulated is deep, vortex frequency waveform distortion after demodulation is less, vortex frequency stability is relatively good, measured deviation is very little, measurement accuracy is high, and because the tuning-points of oscillation chip is fixed, debugging is just very easy, has debugged rear working point and can not drift about.Do not adjust for a long time, working point can not be offset.Measured deviation is less than 0.1m/s, and measuring accuracy also greatly improves, and has reflected exactly the actual wind speed value of underworkings and workplace.Its concrete technical scheme is: the mining intrinsic safety type ultrasound wave probe that tests the speed, comprise base plate, the top board corresponding with base plate, be positioned between bottom upper plate and be fixed on side plate and the eddy current generation body of both sides, described biside plate center is all provided with oscillation chip, described two oscillation chips are positioned in same central transverse axis, described eddy current generation body is positioned on the central longitudinal axis of bottom upper plate, and be positioned at below central transverse axis, it is characterized in that described eddy current generation body is that diameter is the right cylinder of 6mm, the angle of described biside plate is set to 9 ° ~ 12 °.
As of the present utility model preferred, the oscillation frequency of described oscillation chip crystal is 150KHz.The core devices of popping one's head in due to mining intrinsic safety type ultrasonic wind speed is oscillation chip, its effect is exactly to accept to be converted to ultrasonic signal transmitting after oscillator signal that oscillatory circuit sends, after received ultrasonic signal, be converted to electric signal simultaneously and send processing of circuit, general undesired signal is from reception, to enter probe to reach circuit.The various undesired signals that produce when the equipment such as the undesired signal that the interference source of subsurface environment mainly produces in the start-up and operation process from underground equipment and downhole communication are used, for improving interference free performance, vibration oscillation chip has adopted higher frequency of operation, has avoided the various interfering frequencies of down-hole.As preferably adopting copper material to encapsulate and adopt shielded cable special to connect whole oscillation chip, prevent the impact of line-hit and external disturbance.
As further improvement of the utility model, described oscillation chip crystal upper surface and side plate upper surface flush.
As preferably, base plate, side plate are engineering plastics, and top board is stainless steel.
The beneficial effects of the utility model: anti-interference: the mining intrinsic safety type ultrasound wave probe core device (oscillation chip) that tests the speed adopts higher oscillation frequency, its oscillation frequency is chosen in 150KHz left and right, the various interfering frequencies in down-hole have effectively been avoided, stube cable is used shielded cable special, and wind speed sensor for coal mine interference free performance is greatly improved; Stability and measuring accuracy: the stabilization of operating point of probe, at the tuning-points of sound head oscillation chip, can not be offset, greatly improved stability and the measuring accuracy of air velocity transducer, reduced the calibration maintenance workload in using; Security: low in energy consumption, the working current oscillation chip of 10 milliamperes just can produce resonance, ultrasound wave is sent in normal operation.Long service life, can be used lower power voltage supply, minimum available 5V intrinsic safety power voltage supply.Owing to adopting Low-voltage Low-power, the tenure of use of greatly having improved sensing head, can reach tenure of use more than 3 years, under coal mine, use and greatly improved security, to building essential safe type mine tool, be of great significance; Measurement range is wide: can realize the wind speed of the minimum 0.1m/s of survey, the maximum wind speed that reaches 30m/s of surveying; Employing stainless steel material is made, can effectively adapt to environment for use severe under coal mine (subsurface environment high humidity, dust is many, steam has certain corrosivity), intensity is high, and shock resistance is good, can effectively resist the vibrations that impact that downhole blasting brings and collision produce.Core devices sound head shell is used copper material, and centre is vibration absorptive material buffer protection oscillation chip in addition in addition, and uses silica gel rubber seal to be integrated.Probe adopts modular combination, simple in structure, and working service is changed convenient.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model.
Fig. 2 is top board schematic diagram in Fig. 1.
Fig. 3 is base plate schematic diagram in Fig. 1.
Fig. 4 is Fig. 1 latus inframedium schematic diagram.
Fig. 5 is Fig. 1 latus inframedium and base plate scheme of installation.
Embodiment
The mining intrinsic safety type ultrasound wave probe that tests the speed, comprise base plate 001, the top board 002 corresponding with base plate 001, be positioned at bottom upper plate (001, 002) between and be fixed on side plate 003 and the eddy current generation body 004 of both sides, described biside plate 003 center is all provided with oscillation chip 005, described two oscillation chips 005 are positioned in same central transverse axis, described eddy current generation body 004 is positioned at bottom upper plate (001, 002) on central longitudinal axis, and be positioned at below central transverse axis, the right cylinder that described eddy current generation body 004 is 6mm for diameter, the angle of described biside plate 003 is set to 9 ° ~ 12 °.The oscillation frequency of described oscillation chip 005 is 150KHz.Described oscillation chip 005 upper surface and side plate 003 upper surface flush.Base plate 001, side plate 003 are engineering plastics.Top board 002 is stainless steel.
Claims (5)
1. the mining intrinsic safety type ultrasound wave probe that tests the speed, comprise base plate, the top board corresponding with base plate, be positioned between bottom upper plate and be fixed on side plate and the eddy current generation body of both sides, described biside plate center is all provided with oscillation chip, described two oscillation chips are positioned in same central transverse axis, described eddy current generation body is positioned on the central longitudinal axis of bottom upper plate, and be positioned at below central transverse axis, it is characterized in that described eddy current generation body is that diameter is the right cylinder of 6mm, the angle of described biside plate is set to 9 ° ~ 12 °.
2. the mining intrinsic safety type ultrasound wave according to claim 1 probe that tests the speed, the oscillation frequency that it is characterized in that described oscillation chip is 150KHz.
3. the mining intrinsic safety type ultrasound wave according to claim 1 probe that tests the speed, is characterized in that described oscillation chip upper surface and side plate upper surface flush.
4. the mining intrinsic safety type ultrasound wave according to claim 1 probe that tests the speed, is characterized in that base plate, side plate are engineering plastics.
5. the mining intrinsic safety type ultrasound wave according to claim 1 probe that tests the speed, is characterized in that top board is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320561358.2U CN203443971U (en) | 2013-09-11 | 2013-09-11 | Intrinsic safety type supersonic wave speed measurement probe used for mining |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320561358.2U CN203443971U (en) | 2013-09-11 | 2013-09-11 | Intrinsic safety type supersonic wave speed measurement probe used for mining |
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| CN203443971U true CN203443971U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320561358.2U Expired - Lifetime CN203443971U (en) | 2013-09-11 | 2013-09-11 | Intrinsic safety type supersonic wave speed measurement probe used for mining |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499705A (en) * | 2013-09-11 | 2014-01-08 | 宜兴市三恒自动化仪表有限公司 | Intrinsically-safe ultrasonic velocity measuring probe for mine |
-
2013
- 2013-09-11 CN CN201320561358.2U patent/CN203443971U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499705A (en) * | 2013-09-11 | 2014-01-08 | 宜兴市三恒自动化仪表有限公司 | Intrinsically-safe ultrasonic velocity measuring probe for mine |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |