CN203642971U - Supersonic wave flow sensor for mining - Google Patents
Supersonic wave flow sensor for mining Download PDFInfo
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- CN203642971U CN203642971U CN201320849268.3U CN201320849268U CN203642971U CN 203642971 U CN203642971 U CN 203642971U CN 201320849268 U CN201320849268 U CN 201320849268U CN 203642971 U CN203642971 U CN 203642971U
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- 238000005065 mining Methods 0.000 title claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 14
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- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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Abstract
The utility model discloses a supersonic wave flow sensor for mining, and the supersonic wave flow sensor belongs to the field of flow detection. The supersonic wave flow sensor comprises a microprocessor, a first ultrasonic transducer, a second ultrasonic transducer, a drive circuit, an intrinsic safe power supply circuit, a simulation switch switching circuit, a signal processing circuit, and a timing circuit. The supersonic wave flow sensor further comprises a data storage circuit, a reset circuit and a display module. The supersonic wave flow sensor employs low-pressure differential driving technology, echo voltage and weak signal amplification and filtering technology, double core parallel processing technology with a microprocessor and a complex programmable logic device, and high-precise timing technology in picosecond level, and achieves the purposes of high precision, high reliability and low power consumption.
Description
Technical field
The utility model belongs to field of flow detection, particularly relates to a kind of mining ultrasonic flow sensor.
Background technology
Mining ultrasonic flow sensor is a kind of instrument of measuring fluid flow of making time difference of propagating in measuring channel liquid according to ultrasound wave.In ultrasonic probe distance and one timing of measuring tube internal diameter, there is certain linear relationship at ducted flow velocity and ultrasound wave along the difference in co-current flow and counter-current flow travel-time in liquid in liquid, and irrelevant with other physical parameter.
Mining ultrasonic flow sensor principle is simple, and to the research of mining ultrasonic flow sensor early, manufacturing enterprise is more both at home and abroad.But the following problem of ubiquity:
1, existing mining ultrasonic flow sensor is all generally flow sensors of pipeline section type, ultrasonic probe is fixed on a certain segment pipe, will cause so following problem: the one, because needs cut tested pipeline to carry out flange or other connection installations, therefore flow sensor can only be used for some specific caliber, and its on-the-spot scope of application is very restricted; The 2nd, specific on-the-spot such as under coal mine at some, it can not use.
2, antijamming capability is poor, and causing compared with use under complex environment, measurement is inaccurate, even cannot normally measure.
3, because liquid is in the time that flow velocity is lower, its ultrasound wave is forward less with the mistiming of reverse propagation in liquid, and most of ultrasonic flow sensors can not carry out low fluid-velocity survey.
4, existing ultrasonic flow sensor adopts high voltage (even arriving 200V) to drive ultrasonic probe more, makes its power consumption higher, and has limited the use of some particular scene.
Utility model content
Because the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide the ultrasonic flow sensor that a kind of measuring accuracy is higher.
For achieving the above object, the utility model provides a kind of mining ultrasonic flow sensor, comprise microprocessor, the first ultrasonic probe, the second ultrasonic probe, driving circuit and intrinsic safe power circuit, described intrinsic safe power circuit is used for to described microprocessor power supply, the two-way time-sequence control module that is connected with of described microprocessor, the first output terminal of described time-sequence control module connects the input end of described driving circuit, the output terminal of described driving circuit connects the signal input part of the first ultrasonic probe by analog switch commutation circuit, described the second ultrasonic probe receives the ultrasonic signal that described the first ultrasonic probe sends, the signal output part of described the second ultrasonic probe connects the input end of signal processing circuit by described analog switch commutation circuit, the output terminal of described signal processing circuit connects the input end of described time-sequence control module, the second output terminal of described time-sequence control module connects the input end of timing circuit, the output terminal of described timing circuit connects the first input end of described microprocessor.
Adopt above technical scheme, ultrasonic probe includes piezoelectric ceramic wafer, and piezoelectric ceramic wafer converts electrical signals to mechanical vibration by the piezoelectric effect of material.Driving circuit produces pulse waveform excitation the first ultrasonic probe under the control of time-sequence control module, signal processing circuit by the faint detection of the backscatter signal receiving out, and the signal filtering of extracting is amplified, eliminate and disturb, the ultrasonic signal of transmitting is at every turn carried out reception & disposal by signal receiving circuit, defines the terminal of each ultrasonic propagation.Timing circuit is measured the time value of ultrasonic propagation each time, obtains real-time flow rate of liquid value, then convert thereof into the now real-time traffic of tested pipeline through microprocessor processes.
Preferably; described driving circuit comprises optical coupling isolation circuit; the input end of described optical coupling isolation circuit connects the second output terminal of described time-sequence control module; the output terminal of described optical coupling isolation circuit connects the input end of COMS driving circuit; the output terminal of described COMS driving circuit connects the input end of protective circuit of diode, and the output terminal of described protective circuit of diode connects the signal input part of the first ultrasonic probe by analog switch commutation circuit.Adopt above technical scheme, driving circuit produces pulse waveform excitation ultrasonic probe under the control of time-sequence control module, and its driving voltage is low to moderate 16V, greatly reduces power consumption.
Preferably, described signal processing circuit comprises intermediate frequency amplifier circuit, middle all detecting circuits, see-saw circuit and voltage comparator; The input end of described intermediate frequency amplifier circuit connects the output terminal of the second ultrasonic probe by analog switch commutation circuit, the output terminal of described intermediate frequency amplifier circuit connects the input end of described middle all detecting circuits, the output terminal of described middle all detecting circuits connects the input end of described see-saw circuit, the output terminal of described see-saw circuit connects the input end of described voltage comparator, and the output terminal of described voltage comparator connects the input end of described time-sequence control module.
Further, also comprise display module, data storage circuitry and reset circuit; The output terminal of described reset circuit connects the second input end of microprocessor, and the output terminal of described microprocessor connects the signal input part of described display module, and described data storage circuitry is connected with described microprocessor is two-way.
Preferably, described time-sequence control module is CPLD.
The beneficial effects of the utility model are: the utility model adopts low-voltage differential Driving technique, the feeble signal amplification of echo voltage and the double-core parallel processing technique of filtering technique, microprocessor and CPLD, the timing technology of high precision picosecond, has realized high precision, high reliability and the low-power consumption of flow sensor.
Brief description of the drawings
Fig. 1 is the circuit theory schematic diagram of the utility model one embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
As shown in Figure 1, a kind of mining ultrasonic flow sensor, comprise microprocessor 1, the first ultrasonic probe 4, the second ultrasonic probe 5, driving circuit 3, intrinsic safe power circuit 6, display module 16, data storage circuitry 17 and reset circuit 18, described intrinsic safe power circuit 6 is for becoming voltage transitions the backward described microprocessor 1 of 24v to power, the two-way time-sequence control module 2 that is connected with of described microprocessor 1, the first output terminal of described time-sequence control module 2 connects the input end of described driving circuit 3, the output terminal of described driving circuit 3 connects the signal input part of the first ultrasonic probe 4 by analog switch commutation circuit 7, described the second ultrasonic probe 5 receives the ultrasonic signal that described the first ultrasonic probe 4 sends, the signal output part of described the second ultrasonic probe 5 connects the input end of signal processing circuit 8 by described analog switch commutation circuit 7, the output terminal of described signal processing circuit 8 connects the input end of described time-sequence control module 2, the second output terminal of described time-sequence control module 2 connects the input end of timing circuit 9, the output terminal of described timing circuit 9 connects the first input end of described microprocessor 1.The output terminal of described reset circuit 18 connects the second input end of microprocessor 1, and the output terminal of described microprocessor 1 connects the signal input part of described display module 16, described data storage circuitry 17 and described two-way connection of microprocessor 1.In the present embodiment, described time-sequence control module 2 is CPLD, and described microprocessor adopts ARM chip to realize.This sensor can adopt outer clipping structure, do not need flange to install, it is different from other flowmeters that flange is installed, its mounting head adopts magnet to be directly adsorbed on outer wall, if it is not adsorbable to run into magnet, pricks and be bundled in pipeline outer wall with pipe, this mounting means does not need tested pipeline to destroy, and can be applicable to requirement and the various conventional caliber of rugged surroundings under mine.In the present embodiment, described intrinsic safe power circuit can meet Exib I Mb requirement of explosion proof completely, and this sensor belongs to essential safe type, can be applicable to various hazardous areas, especially under coal mine.
Described driving circuit 3 comprises optical coupling isolation circuit 10; the input end of described optical coupling isolation circuit 10 connects the second output terminal of described time-sequence control module 2; the output terminal of described optical coupling isolation circuit 10 connects the input end of COMS driving circuit 19; the output terminal of described COMS driving circuit 19 connects the input end of protective circuit of diode 11, and the output terminal of described protective circuit of diode 11 connects the signal input part of the first ultrasonic probe 4 by analog switch commutation circuit 7.
Described signal processing circuit 8 comprises intermediate frequency amplifier circuit 12, middle all detecting circuits 13, see-saw circuit 14 and voltage comparator 15; The input end of described intermediate frequency amplifier circuit 12 connects the output terminal of the second ultrasonic probe 5 by analog switch commutation circuit 7, the output terminal of described intermediate frequency amplifier circuit 12 connects the input end of described middle all detecting circuits 13, the output terminal of described middle all detecting circuits 13 connects the input end of described see-saw circuit 14, the output terminal of described see-saw circuit 14 connects the input end of described voltage comparator 15, and the output terminal of described voltage comparator 15 connects the input end of described time-sequence control module 2.
The utility model adopts ARM chip and CPLD(Complex Programmable Logic Device, CPLD) two microprocessors, can accurately control more sequential and process synchronous sequence, timing control sequential etc. such as ultrasonic probe drives sequential, signal, the accuracy and the reliability that have improved the requirement of control sequential are high; Meanwhile, be used in conjunction with two chips, more common single-chip conventional processing is compared, and calculation process speed is further promoted; Each performs its own functions for they, and it is better that precision becomes.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technician in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in by the determined protection domain of claims.
Claims (5)
1. a mining ultrasonic flow sensor, comprise microprocessor (1), the first ultrasonic probe (4), the second ultrasonic probe (5), driving circuit (3) and intrinsic safe power circuit (6), described intrinsic safe power circuit (6) is for powering to described microprocessor (1), it is characterized in that: the two-way time-sequence control module (2) that is connected with of described microprocessor (1), the first output terminal of described time-sequence control module (2) connects the input end of described driving circuit (3), the output terminal of described driving circuit (3) connects the signal input part of the first ultrasonic probe (4) by analog switch commutation circuit (7), described the second ultrasonic probe (5) receives the ultrasonic signal that described the first ultrasonic probe (4) sends, the signal output part of described the second ultrasonic probe (5) connects the input end of signal processing circuit (8) by described analog switch commutation circuit (7), the output terminal of described signal processing circuit (8) connects the input end of described time-sequence control module (2), the second output terminal of described time-sequence control module (2) connects the input end of timing circuit (9), the output terminal of described timing circuit (9) connects the first input end of described microprocessor (1).
2. mining ultrasonic flow sensor as claimed in claim 1, it is characterized in that: described driving circuit (3) comprises optical coupling isolation circuit (10), the input end of described optical coupling isolation circuit (10) connects the second output terminal of described time-sequence control module (2), the output terminal of described optical coupling isolation circuit (10) connects the input end of COMS driving circuit (19), the output terminal of described COMS driving circuit (19) connects the input end of protective circuit of diode (11), the output terminal of described protective circuit of diode (11) connects the signal input part of the first ultrasonic probe (4) by analog switch commutation circuit (7).
3. mining ultrasonic flow sensor as claimed in claim 1, is characterized in that: described signal processing circuit (8) comprises intermediate frequency amplifier circuit (12), middle all detecting circuits (13), see-saw circuit (14) and voltage comparator (15); The input end of described intermediate frequency amplifier circuit (12) connects the output terminal of the second ultrasonic probe (5) by analog switch commutation circuit (7), the output terminal of described intermediate frequency amplifier circuit (12) connects the input end of described middle all detecting circuits (13), the output terminal of described middle all detecting circuits (13) connects the input end of described see-saw circuit (14), the output terminal of described see-saw circuit (14) connects the input end of described voltage comparator (15), and the output terminal of described voltage comparator (15) connects the input end of described time-sequence control module (2).
4. the mining ultrasonic flow sensor as described in claim 1 or 2 or 3, is characterized in that: also comprise display module (16), data storage circuitry (17) and reset circuit (18); The output terminal of described reset circuit (18) connects the second input end of microprocessor (1), the output terminal of described microprocessor (1) connects the signal input part of described display module (16), described data storage circuitry (17) and two-way connection of described microprocessor (1).
5. the mining ultrasonic flow sensor as described in claim 1 or 2 or 3, is characterized in that: described time-sequence control module (2) is CPLD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849268.3U CN203642971U (en) | 2013-12-20 | 2013-12-20 | Supersonic wave flow sensor for mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849268.3U CN203642971U (en) | 2013-12-20 | 2013-12-20 | Supersonic wave flow sensor for mining |
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| Publication Number | Publication Date |
|---|---|
| CN203642971U true CN203642971U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320849268.3U Expired - Lifetime CN203642971U (en) | 2013-12-20 | 2013-12-20 | Supersonic wave flow sensor for mining |
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| Country | Link |
|---|---|
| CN (1) | CN203642971U (en) |
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2013
- 2013-12-20 CN CN201320849268.3U patent/CN203642971U/en not_active Expired - Lifetime
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Granted publication date: 20140611 |
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| CX01 | Expiry of patent term |