CN103453957A - Ultrasonic flowmeter with pipe detection and self-correction functions - Google Patents
Ultrasonic flowmeter with pipe detection and self-correction functions Download PDFInfo
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- CN103453957A CN103453957A CN2013104424766A CN201310442476A CN103453957A CN 103453957 A CN103453957 A CN 103453957A CN 2013104424766 A CN2013104424766 A CN 2013104424766A CN 201310442476 A CN201310442476 A CN 201310442476A CN 103453957 A CN103453957 A CN 103453957A
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Abstract
The invention relates to an ultrasonic flowmeter with pipe detection and self-correction functions. The ultrasonic flowmeter comprises a control circuit, a temperature sensor, a pressure sensor and two sets of ultrasonic energy converters, the temperature sensor, the pressure sensor and the ultrasonic energy converters are all connected with the control circuit through electrode leads, a first set of the ultrasonic energy converters comprises a first emitting probe and a first receiving probe, a second set of the ultrasonic energy converters comprises a second emitting probe and a second receiving probe, the first emitting probe and the first receiving probe are arranged on a gas pipeline in a 45-degree-inclination manner, the second emitting probe and the second receiving probe are arranged on the gas pipeline in a 45-degree-inclination manner, and the control circuit comprises a waveform and clock signal generation circuit, a pre-amplification circuit, an envelope detection circuit and a CPU (central processing unit) processing circuit which are electrically connected with one another. Accuracy of ultrasonic flowing-speed measuring can reach 10-5-10-6 orders of magnitude; pulse measuring which is higher in collection frequency is adopted, so that the ultrasonic flowmeter is higher in accuracy rate.
Description
Technical field
The present invention relates to a kind of Ultrasonic Wave Flowmeter, specifically, relate to a kind ofly with pipeline detecting, from the ultrasonic flow meter of error correction, belong to the automation instrument technology field.
Background technology
Along with the particularly fast development of measuring ultrasonic wave flow technology of robotization flow measurement instrument, the defect of traditional flow instrument (as flow instruments such as turbine, vortex street, waist wheel, target formulas) and the restriction of field of employment, people focus on finding new flow measurement technology more.Measuring ultrasonic wave flow development is in recent years maked rapid progress especially, with traditional flow instrument, compares, and impels people to find benefit higher, and the life-span is longer, the measuring method of the flowmeter that reliability is higher.
Fast development of ultrasonic flow meter becomes the flow measurement field, especially measures the first-selection of hydrocarbon.Along with the user recognizes the many merits of ultrasonic flow meter gradually, comprise pinpoint accuracy, without hindrance measurement and lower total cost of ownership etc.
The main method of measuring ultrasonic wave flow is propagation speed differential method, Doppler method etc. at present.Its ultimate principle is all that while measuring the ultrasonic pulse co-current flow and counter-current flow, the difference of speed reflects the flow velocity of liquid, thereby measures flow.And for the vacant duct detecting, self-checking, remote data transmission, the aspects such as stability and reliability and precision are still undesirable.
Summary of the invention
The problem to be solved in the present invention is for above deficiency, provides a kind of with the pipeline detecting, from the ultrasonic flow meter of error correction, has advantages of that stability, reliability and precision are high.
For overcoming the above problems, the technical scheme that the present invention takes is: a kind of with the pipeline detecting, from the ultrasonic flow meter of error correction, it is characterized in that: described ultrasonic flow meter comprises control circuit, temperature sensor, pressure transducer and two groups of ultrasonic transducers;
Described temperature sensor, pressure transducer and two groups of ultrasonic transducers are connected with control circuit by contact conductor; First group of ultrasonic transducer comprises the first transmitting probe, the first receiving transducer, and second group of ultrasonic transducer comprises the second transmitting probe and the second receiving transducer;
Described the first transmitting probe, the first receiving transducer become 45 degree inclination angles arranged in a crossed manner on gas pipeline, and the second transmitting probe becomes 45 degree inclination angles arranged in a crossed manner on gas pipeline with the second receiving transducer.
A kind of prioritization scheme, described control circuit comprises waveform and clock generating circuit, pre-amplification circuit, envelope detection circuit and the CPU treatment circuit of electrical connection;
Described waveform and clock generating circuit comprise capacitor C 1, capacitor C 2, resistance R 1, crystal oscillator X1, phase inverter NOT1, phase inverter NOT2, counter U1, storer U2, D/A converter U3, low-pass filter and follower, one end of resistance R 1 is through capacitor C 1 ground connection, the other end of resistance R 1 is through capacitor C 2 ground connection, the end of one termination crystal oscillator X1 of resistance R 1, the input end of the output terminal of phase inverter NOT1 and phase inverter NOT2, the other end of another termination crystal oscillator X1 of resistance R 1, the input end of phase inverter NOT1, the CLK end of the output termination counter U1 of phase inverter NOT2, the CLK end of D/A converter U3, storer U2 is connected between counter U1 and D/A converter U3, D/A converter U3 connects follower through low-pass filter.
Another kind of prioritization scheme, described pre-amplification circuit comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 11, operational amplifier U4, operational amplifier U5, operational amplifier U6, operational amplifier U4, operational amplifier U5, the in-phase input end ground connection of operational amplifier U6, capacitor C 3 is connected between the in-phase input end and inverting input of operational amplifier U4, resistance R 2, capacitor C 4 is connected in parallel between the output terminal and inverting input of operational amplifier U4, an end of the output termination capacitor C 5 of operational amplifier U4, an end of another termination capacitor C 6 of capacitor C 5 through resistance R 3 ground connection, an end of another termination capacitor C 7 of capacitor C 6, one end of resistance R 4, the inverting input of another termination operational amplifier U5 of resistance R 4, the in-phase input end of another termination operational amplifier U5 of capacitor C 7 through resistance R 5 ground connection, the output terminal of operational amplifier U5 is through the end of capacitor C 8 connecting resistance R6, one end of resistance R 7, the other end ground connection of resistance R 6, the inverting input of another termination operational amplifier U6 of resistance R 7, one end of capacitor C 9, one end of capacitor C 10, the in-phase input end of another termination operational amplifier U6 of capacitor C 9, the other end of capacitor C 10 connects the output terminal of operational amplifier U6 through capacitor C 11, the output termination envelope detection circuit of operational amplifier U6.
Another prioritization scheme, described envelope detection circuit comprises resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 26, resistance R 27, capacitor C 12, capacitor C 13, capacitor C 14, diode D1, diode D2, amplifier U7, amplifier U8 and amplifier U14, the output terminal of one termination operational amplifier U6 of resistance R 8, the in-phase input end of another termination amplifier U7 of resistance R 8, the end of the anti-phase input terminating resistor R9 of amplifier U7, the positive pole of diode D1, the inverting input of another termination amplifier U8 of resistance R 9, one end of resistance R 26 and the output terminal of amplifier U8, the negative pole of diode D1 connects the output terminal of amplifier U7, the positive pole of diode D2, the negative pole of diode D2 connects an end of capacitor C 12, one end of resistance R 10, one end of resistance R 11, the other end of capacitor C 12, the other end ground connection of resistance R 10, the in-phase input end of another termination amplifier U8 of resistance R 11, the end of the other end connecting resistance R27 of resistance R 26, one end of capacitor C 13, one end of another termination capacitor C 14 of resistance R 27, the in-phase input end of amplifier U14, the other end ground connection of capacitor C 14, inverting input and the output terminal of another termination amplifier U14 of capacitor C 13, the output termination CPU treatment circuit of amplifier U14.
Further prioritization scheme, described CPU treatment circuit comprises resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, resistance R 19, resistance R 20, resistance R 21, resistance R 22, resistance R 23, resistance R 24, resistance R 25, capacitor C 16, capacitor C 17, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, capacitor C 22, capacitor C 23, capacitor C 24, capacitor C 25, crystal oscillator X1, crystal oscillator X2, switch SW, single-chip microcomputer U9, supply voltage comparer U10, high-speed comparator U11, linear voltage regulator U12, LCD display driver U13,98 pin of single-chip microcomputer U9, the end of 99 pin connecting resistance R13, one end of resistance R 12, another termination 3V power supply of resistance R 13, the other end of resistance R 12 is through switch SW ground connection, the end of the 93 pin connecting resistance R15 of single-chip microcomputer U9, 3 pin of contact pin interface P1, the end of the 92 pin connecting resistance R16 of single-chip microcomputer U9, 4 pin of contact pin interface P1, the end of the 91 pin connecting resistance R17 of single-chip microcomputer U9, 2 pin of contact pin interface P1,1 pin of a termination pin interface P1 of resistance R 14, the other end of resistance R 14, the other end of resistance R 15, the other end of resistance R 16, another termination 5V power supply of resistance R 17,5 pin of contact pin interface P1 connect 86 pin of single-chip microcomputer U9, one end of resistance R 19, 1 pin of supply voltage comparer U10, one end of capacitor C 20, the other end of resistance R 19, 2 pin of supply voltage comparer U10 connect the 3V power supply, the other end ground connection of capacitor C 20, and capacitor C 21 is connected between 3 pin and 5 pin of supply voltage comparer U10, the 3 pin ground connection of supply voltage comparer U10, the end of the 89 pin connecting resistance R18 of single-chip microcomputer U9, the end of crystal oscillator X2, one end of capacitor C 16, the other end of resistance R 18, the other end of crystal oscillator X2 connects 87 pin of single-chip microcomputer U9, one end of capacitor C 17, the other end of capacitor C 16, the other end ground connection of capacitor C 17,85 pin of single-chip microcomputer U9 connect the end of crystal oscillator X1, one end of capacitor C 18, the other end of crystal oscillator X1 connects 84 pin of single-chip microcomputer U9, one end of capacitor C 19, the other end of capacitor C 18, the other end ground connection of capacitor C 19, 81 pin of single-chip microcomputer U9 connect 1 pin of high-speed comparator U11, 80 pin of single-chip microcomputer U9 connect 2 pin of high-speed comparator U11, and 79 pin of single-chip microcomputer U9 connect 3 pin of high-speed comparator U11, and 78 pin of single-chip microcomputer U9 connect 4 pin of high-speed comparator U11, one end of resistance R 21, the other end ground connection of resistance R 21,76 pin of single-chip microcomputer U9 are through resistance R 20 ground connection.
Prioritization scheme further, 1 pin of the 74 pin wiring voltage stabilizer U12 of described single-chip microcomputer U9, 2 pin of linear voltage regulator U12 connect an end of capacitor C 22, one end of resistance R 22, the other end of capacitor C 22 connects 55 pin of single-chip microcomputer U9, another termination 3V power supply of resistance R 22 end of connecting resistance R23, one end of capacitor C 25, the end of the other end connecting resistance R24 of resistance R 23, one end of capacitor C 24, the end of the other end connecting resistance R25 of resistance R 24, one end of capacitor C 23, the other end of resistance R 25, the other end of capacitor C 23, the other end of capacitor C 24, the other end ground connection of capacitor C 25, 72 pin of single-chip microcomputer U9 connect the output terminal of amplifier U14.
Prioritization scheme further, described the first transmitting probe connects 41 pin of single-chip microcomputer U9, and the first receiving transducer connects 42 pin of single-chip microcomputer U9, and the second transmitting probe connects 43 pin of single-chip microcomputer U9, the second receiving transducer connects 44 pin of single-chip microcomputer U9, and display screen driver module U13 connects single-chip microcomputer U9.
The present invention adopts above technical scheme, compared with prior art, has the following advantages: at first pass through Low Drift Temperature and low noise preposition amplification and bandpass filtering from the signal of ultrasound wave receiving transducer output, amplify useful signal, the filtering clutter impact.The emulation random signal is found in the envelope detection circuit demodulation, makes the amplitude stability of concurrent-countercurrent amount two road signals, by the field programmable gate array control module, is realized.
Two groups of ultrasonic transducers become 45 degree inclination angle chiasma types to install, at a time, with identical pumping signal Z(t) encourage the first transmitting probe 1 and the second transmitting probe 3 simultaneously, pass through respectively the time of T1 and T2, the signal that the first receiving transducer 2 and the second receiving transducer 4 receive by signal change amplification, filtering circuit obtains signal Y(t) and X(t).Due to two groups of ultrasonic transducers in a perform region, the time interval is very short, pumping signal is again to encourage simultaneously, the two paths of signals of sending out suffered modulating action in flow field basic identical, Y(t) and X(t) be waveform similarity, two groups of signals of free interval △ t=t1-t2 on time shaft just.Utilize this crosscorrelation time difference method to be measured, can reach ± △ of temporal resolution, △ is two groups of ultrasonic transducer sampling time intervals, at this moment the clock pulse count precision determines the precision of measuring, the frequency of clock pulse count is higher, and to collect resolution just higher, just can be more accurate in counting.
With traditional ultrasonic flow meter, compare, the accuracy of ultrasonic measurement flow velocity can reach 10-5～10-6 order of magnitude, and has adopted the pulse measurement that frequency acquisition is higher, and accuracy rate is higher.
Below in conjunction with drawings and Examples, the present invention is described in detail.
The accompanying drawing explanation
The schematic diagram that accompanying drawing 1 is ultrasonic measurement in the embodiment of the present invention;
The schematic diagram that accompanying drawing 2 is wave generator circuit in the embodiment of the present invention;
The schematic diagram that accompanying drawing 3 is preposition filtering and amplifying circuit in the embodiment of the present invention;
The schematic diagram that accompanying drawing 4 is envelope detection circuit in the embodiment of the present invention;
The schematic diagram that accompanying drawing 5 is signal processing circuit in the embodiment of the present invention;
In figure,
1-the first transmitting probe, 2-the first receiving transducer, 3-the second transmitting probe, 4-the second receiving transducer, 5-contact conductor, 6-control circuit, 7-temperature sensor, 8-pressure transducer, 9-gas pipeline.
Embodiment
For the technical characterstic of this programme can clearly be described, below by embodiment, and by reference to the accompanying drawings, the present invention will be described in detail.
Embodiment, as shown in Figure 1, a kind ofly with pipeline, detect, ultrasonic flow meter from error correction, comprise control circuit 6, temperature sensor 7, pressure transducer 8 and two groups of ultrasonic transducers, temperature sensor 7, pressure transducer 8 is connected with control circuit 6 by contact conductor 5 with two groups of ultrasonic transducers, first group of ultrasonic transducer comprises the first transmitting probe 1, the first receiving transducer 2, second group of ultrasonic transducer comprises the second transmitting probe 3 and the second receiving transducer 4, the first transmitting probe 1, the first 2 one-tenth of receiving transducers, 45 degree inclination angles are arranged in a crossed manner on gas pipeline 9, 4 one-tenth 45 degree inclination angles of the second transmitting probe 3 and the second receiving transducer are arranged in a crossed manner on gas pipeline 9.
Control circuit 6 comprises waveform and clock generating circuit, pre-amplification circuit, envelope detection circuit and the CPU treatment circuit of electrical connection.
As shown in Figure 2, waveform and clock generating circuit comprise capacitor C 1, capacitor C 2, resistance R 1, crystal oscillator X1, phase inverter NOT1, phase inverter NOT2, counter U1, storer U2, D/A converter U3, low-pass filter and follower, one end of resistance R 1 is through capacitor C 1 ground connection, the other end of resistance R 1 is through capacitor C 2 ground connection, the end of one termination crystal oscillator X1 of resistance R 1, the input end of the output terminal of phase inverter NOT1 and phase inverter NOT2, the other end of another termination crystal oscillator X1 of resistance R 1, the input end of phase inverter NOT1, the CLK end of the output termination counter U1 of phase inverter NOT2, the CLK end of D/A converter U3, storer U2 is connected between counter U1 and D/A converter U3, D/A converter U3 connects follower through low-pass filter.
As shown in Figure 3, pre-amplification circuit comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 11, operational amplifier U4, operational amplifier U5, operational amplifier U6, operational amplifier U4, operational amplifier U5, the in-phase input end ground connection of operational amplifier U6, capacitor C 3 is connected between the in-phase input end and inverting input of operational amplifier U4, resistance R 2, capacitor C 4 is connected in parallel between the output terminal and inverting input of operational amplifier U4, an end of the output termination capacitor C 5 of operational amplifier U4, an end of another termination capacitor C 6 of capacitor C 5 through resistance R 3 ground connection, an end of another termination capacitor C 7 of capacitor C 6, one end of resistance R 4, the inverting input of another termination operational amplifier U5 of resistance R 4, the in-phase input end of another termination operational amplifier U5 of capacitor C 7 through resistance R 5 ground connection, the output terminal of operational amplifier U5 is through the end of capacitor C 8 connecting resistance R6, one end of resistance R 7, the other end ground connection of resistance R 6, the inverting input of another termination operational amplifier U6 of resistance R 7, one end of capacitor C 9, one end of capacitor C 10, the in-phase input end of another termination operational amplifier U6 of capacitor C 9, the other end of capacitor C 10 connects the output terminal of operational amplifier U6 through capacitor C 11, the output termination envelope detection circuit of operational amplifier U6.
As shown in Figure 4, envelope detection circuit comprises resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 26, resistance R 27, capacitor C 12, capacitor C 13, capacitor C 14, diode D1, diode D2, amplifier U7, amplifier U8 and amplifier U14, the output terminal of one termination operational amplifier U6 of resistance R 8, the in-phase input end of another termination amplifier U7 of resistance R 8, the end of the anti-phase input terminating resistor R9 of amplifier U7, the positive pole of diode D1, the inverting input of another termination amplifier U8 of resistance R 9, one end of resistance R 26 and the output terminal of amplifier U8, the negative pole of diode D1 connects the output terminal of amplifier U7, the positive pole of diode D2, the negative pole of diode D2 connects an end of capacitor C 12, one end of resistance R 10, one end of resistance R 11, the other end of capacitor C 12, the other end ground connection of resistance R 10, the in-phase input end of another termination amplifier U8 of resistance R 11, the end of the other end connecting resistance R27 of resistance R 26, one end of capacitor C 13, one end of another termination capacitor C 14 of resistance R 27, the in-phase input end of amplifier U14, the other end ground connection of capacitor C 14, inverting input and the output terminal of another termination amplifier U14 of capacitor C 13, the output termination CPU treatment circuit of amplifier U14.
Amplifier U7 has the half-wave rectification structure, and U8 forms voltage follower, at detection resistance, play buffer action between capacitance network and output load, U8 output voltage V co equates with the voltage Vc of capacitor C 12, and U14 is the positive feedback low-pass filter, the higher hamonic wave composition of filtering detection.When Vco is less than Vsr, diode D1 cut-off, diode D2 conducting, U7 amplifies error voltage, and by diode, D2 passes to RC network, makes Vco follow the tracks of Vsr; When Vco is greater than Vsr, diode D1 conducting, diode D2 cut-off, cut off between RC network and U7, and the Vco electric discharge reduces.Due to the resistance of resistance R 10, generally much larger than the conducting resistance Rd of diode D2, so charging rate is much larger than the velocity of discharge, and envelope detection circuit just can effectively must detect echo signal envelope like this.
As shown in Figure 5, the CPU treatment circuit comprises resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, resistance R 19, resistance R 20, resistance R 21, resistance R 22, resistance R 23, resistance R 24, resistance R 25, capacitor C 16, capacitor C 17, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, capacitor C 22, capacitor C 23, capacitor C 24, capacitor C 25, crystal oscillator X1, crystal oscillator X2, switch SW, single-chip microcomputer U9, supply voltage comparer U10, high-speed comparator U11, linear voltage regulator U12, LCD display driver U13,98 pin of single-chip microcomputer U9, the end of 99 pin connecting resistance R13, one end of resistance R 12, another termination 3V power supply of resistance R 13, the other end of resistance R 12 is through switch SW ground connection, the end of the 93 pin connecting resistance R15 of single-chip microcomputer U9, 3 pin of contact pin interface P1, the end of the 92 pin connecting resistance R16 of single-chip microcomputer U9, 4 pin of contact pin interface P1, the end of the 91 pin connecting resistance R17 of single-chip microcomputer U9, 2 pin of contact pin interface P1,1 pin of a termination pin interface P1 of resistance R 14, the other end of resistance R 14, the other end of resistance R 15, the other end of resistance R 16, another termination 5V power supply of resistance R 17,5 pin of contact pin interface P1 connect 86 pin of single-chip microcomputer U9, one end of resistance R 19, 1 pin of supply voltage comparer U10, one end of capacitor C 20, the other end of resistance R 19, 2 pin of supply voltage comparer U10 connect the 3V power supply, the other end ground connection of capacitor C 20, and capacitor C 21 is connected between 3 pin and 5 pin of supply voltage comparer U10, the 3 pin ground connection of supply voltage comparer U10, the end of the 89 pin connecting resistance R18 of single-chip microcomputer U9, the end of crystal oscillator X2, one end of capacitor C 16, the other end of resistance R 18, the other end of crystal oscillator X2 connects 87 pin of single-chip microcomputer U9, one end of capacitor C 17, the other end of capacitor C 16, the other end ground connection of capacitor C 17,85 pin of single-chip microcomputer U9 connect the end of crystal oscillator X1, one end of capacitor C 18, the other end of crystal oscillator X1 connects 84 pin of single-chip microcomputer U9, one end of capacitor C 19, the other end of capacitor C 18, the other end ground connection of capacitor C 19, 81 pin of single-chip microcomputer U9 connect 1 pin of high-speed comparator U11, 80 pin of single-chip microcomputer U9 connect 2 pin of high-speed comparator U11, and 79 pin of single-chip microcomputer U9 connect 3 pin of high-speed comparator U11, and 78 pin of single-chip microcomputer U9 connect 4 pin of high-speed comparator U11, one end of resistance R 21, the other end ground connection of resistance R 21,76 pin of single-chip microcomputer U9 are through resistance R 20 ground connection.
1 pin of the 74 pin wiring voltage stabilizer U12 of single-chip microcomputer U9, 2 pin of linear voltage regulator U12 connect an end of capacitor C 22, one end of resistance R 22, the other end of capacitor C 22 connects 55 pin of single-chip microcomputer U9, another termination 3V power supply of resistance R 22 end of connecting resistance R23, one end of capacitor C 25, the end of the other end connecting resistance R24 of resistance R 23, one end of capacitor C 24, the end of the other end connecting resistance R25 of resistance R 24, one end of capacitor C 23, the other end of resistance R 25, the other end of capacitor C 23, the other end of capacitor C 24, the other end ground connection of capacitor C 25, 72 pin of single-chip microcomputer U9 connect the output terminal of amplifier U14.
The first transmitting probe 1 connects 41 pin of single-chip microcomputer U9, and the first receiving transducer 2 connects 42 pin of single-chip microcomputer U9, and the second transmitting probe 3 connects 43 pin of single-chip microcomputer U9, and the second receiving transducer 4 connects 44 pin of single-chip microcomputer U9, and display screen driver module U13 connects single-chip microcomputer U9.
At first pass through Low Drift Temperature and low noise preposition from the signal of ultrasound wave receiving transducer output
Amplify and bandpass filtering, amplify useful signal, the filtering clutter impact.The emulation random signal is found in the envelope detection circuit demodulation, makes the amplitude stability of concurrent-countercurrent amount two road signals, by the field programmable gate array control module, is realized.
Two groups of ultrasonic transducers become 45 degree inclination angle chiasma types to install, at a time, with identical pumping signal Z(t) encourage the first transmitting probe 1 and the second transmitting probe 3 simultaneously, pass through respectively the time of T1 and T2, the signal that the first receiving transducer 2 and the second receiving transducer 4 receive by signal change amplification, filtering circuit obtains signal Y(t) and X(t).Due to two groups of ultrasonic transducers in a perform region, the time interval is very short, pumping signal is again to encourage simultaneously, the two paths of signals of sending out suffered modulating action in flow field basic identical, Y(t) and X(t) be waveform similarity, two groups of signals of free interval △ t=t1-t2 on time shaft just.Utilize this crosscorrelation time difference method to be measured, can reach ± △ of temporal resolution, △ is two groups of ultrasonic transducer sampling time intervals, at this moment the clock pulse count precision determines the precision of measuring, the frequency of clock pulse count is higher, and to collect resolution just higher, just can be more accurate in counting.
Those skilled in the art will recognize that; above-mentioned embodiment is exemplary; in order to make those skilled in the art can better understand content of the present invention; should not be understood as limiting the scope of the invention; so long as the improvement of doing according to technical solution of the present invention all falls into protection scope of the present invention.
Claims (7)
1. one kind with pipeline detecting, from the ultrasonic flow meter of error correction, and it is characterized in that: described ultrasonic flow meter comprises control circuit (6), temperature sensor (7), pressure transducer (8) and two groups of ultrasonic transducers;
Described temperature sensor (7), pressure transducer (8) and two groups of ultrasonic transducers are connected with control circuit (6) by contact conductor (5); First group of ultrasonic transducer comprises the first transmitting probe (1), the first receiving transducer (2), and second group of ultrasonic transducer comprises the second transmitting probe (3) and the second receiving transducer (4);
Described the first transmitting probe (1), the first receiving transducer (2) become 45 degree inclination angles arranged in a crossed manner upper at gas pipeline (9), and the second transmitting probe (3) becomes 45 degree inclination angles arranged in a crossed manner on gas pipeline (9) with the second receiving transducer (4).
2. ultrasonic flow meter as claimed in claim 1, it is characterized in that: described control circuit (6) comprises waveform and clock generating circuit, pre-amplification circuit, envelope detection circuit and the CPU treatment circuit of electrical connection;
Described waveform and clock generating circuit comprise capacitor C 1, capacitor C 2, resistance R 1, crystal oscillator X1, phase inverter NOT1, phase inverter NOT2, counter U1, storer U2, D/A converter U3, low-pass filter and follower, one end of resistance R 1 is through capacitor C 1 ground connection, the other end of resistance R 1 is through capacitor C 2 ground connection, the end of one termination crystal oscillator X1 of resistance R 1, the input end of the output terminal of phase inverter NOT1 and phase inverter NOT2, the other end of another termination crystal oscillator X1 of resistance R 1, the input end of phase inverter NOT1, the CLK end of the output termination counter U1 of phase inverter NOT2, the CLK end of D/A converter U3, storer U2 is connected between counter U1 and D/A converter U3, D/A converter U3 connects follower through low-pass filter.
3. ultrasonic flow meter as claimed in claim 2, it is characterized in that: described pre-amplification circuit comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 11, operational amplifier U4, operational amplifier U5, operational amplifier U6, operational amplifier U4, operational amplifier U5, the in-phase input end ground connection of operational amplifier U6, capacitor C 3 is connected between the in-phase input end and inverting input of operational amplifier U4, resistance R 2, capacitor C 4 is connected in parallel between the output terminal and inverting input of operational amplifier U4, an end of the output termination capacitor C 5 of operational amplifier U4, an end of another termination capacitor C 6 of capacitor C 5 through resistance R 3 ground connection, an end of another termination capacitor C 7 of capacitor C 6, one end of resistance R 4, the inverting input of another termination operational amplifier U5 of resistance R 4, the in-phase input end of another termination operational amplifier U5 of capacitor C 7 through resistance R 5 ground connection, the output terminal of operational amplifier U5 is through the end of capacitor C 8 connecting resistance R6, one end of resistance R 7, the other end ground connection of resistance R 6, the inverting input of another termination operational amplifier U6 of resistance R 7, one end of capacitor C 9, one end of capacitor C 10, the in-phase input end of another termination operational amplifier U6 of capacitor C 9, the other end of capacitor C 10 connects the output terminal of operational amplifier U6 through capacitor C 11, the output termination envelope detection circuit of operational amplifier U6.
4. ultrasonic flow meter as claimed in claim 3, it is characterized in that: described envelope detection circuit comprises resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 26, resistance R 27, capacitor C 12, capacitor C 13, capacitor C 14, diode D1, diode D2, amplifier U7, amplifier U8 and amplifier U14, the output terminal of one termination operational amplifier U6 of resistance R 8, the in-phase input end of another termination amplifier U7 of resistance R 8, the end of the anti-phase input terminating resistor R9 of amplifier U7, the positive pole of diode D1, the inverting input of another termination amplifier U8 of resistance R 9, one end of resistance R 26 and the output terminal of amplifier U8, the negative pole of diode D1 connects the output terminal of amplifier U7, the positive pole of diode D2, the negative pole of diode D2 connects an end of capacitor C 12, one end of resistance R 10, one end of resistance R 11, the other end of capacitor C 12, the other end ground connection of resistance R 10, the in-phase input end of another termination amplifier U8 of resistance R 11, the end of the other end connecting resistance R27 of resistance R 26, one end of capacitor C 13, one end of another termination capacitor C 14 of resistance R 27, the in-phase input end of amplifier U14, the other end ground connection of capacitor C 14, inverting input and the output terminal of another termination amplifier U14 of capacitor C 13, the output termination CPU treatment circuit of amplifier U14.
5. ultrasonic flow meter as claimed in claim 4, it is characterized in that: described CPU treatment circuit comprises resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, resistance R 19, resistance R 20, resistance R 21, resistance R 22, resistance R 23, resistance R 24, resistance R 25, capacitor C 16, capacitor C 17, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, capacitor C 22, capacitor C 23, capacitor C 24, capacitor C 25, crystal oscillator X1, crystal oscillator X2, switch SW, single-chip microcomputer U9, supply voltage comparer U10, high-speed comparator U11, linear voltage regulator U12, LCD display driver U13,98 pin of single-chip microcomputer U9, the end of 99 pin connecting resistance R13, one end of resistance R 12, another termination 3V power supply of resistance R 13, the other end of resistance R 12 is through switch SW ground connection, the end of the 93 pin connecting resistance R15 of single-chip microcomputer U9, 3 pin of contact pin interface P1, the end of the 92 pin connecting resistance R16 of single-chip microcomputer U9, 4 pin of contact pin interface P1, the end of the 91 pin connecting resistance R17 of single-chip microcomputer U9, 2 pin of contact pin interface P1,1 pin of a termination pin interface P1 of resistance R 14, the other end of resistance R 14, the other end of resistance R 15, the other end of resistance R 16, another termination 5V power supply of resistance R 17,5 pin of contact pin interface P1 connect 86 pin of single-chip microcomputer U9, one end of resistance R 19, 1 pin of supply voltage comparer U10, one end of capacitor C 20, the other end of resistance R 19, 2 pin of supply voltage comparer U10 connect the 3V power supply, the other end ground connection of capacitor C 20, and capacitor C 21 is connected between 3 pin and 5 pin of supply voltage comparer U10, the 3 pin ground connection of supply voltage comparer U10, the end of the 89 pin connecting resistance R18 of single-chip microcomputer U9, the end of crystal oscillator X2, one end of capacitor C 16, the other end of resistance R 18, the other end of crystal oscillator X2 connects 87 pin of single-chip microcomputer U9, one end of capacitor C 17, the other end of capacitor C 16, the other end ground connection of capacitor C 17,85 pin of single-chip microcomputer U9 connect the end of crystal oscillator X1, one end of capacitor C 18, the other end of crystal oscillator X1 connects 84 pin of single-chip microcomputer U9, one end of capacitor C 19, the other end of capacitor C 18, the other end ground connection of capacitor C 19, 81 pin of single-chip microcomputer U9 connect 1 pin of high-speed comparator U11, 80 pin of single-chip microcomputer U9 connect 2 pin of high-speed comparator U11, and 79 pin of single-chip microcomputer U9 connect 3 pin of high-speed comparator U11, and 78 pin of single-chip microcomputer U9 connect 4 pin of high-speed comparator U11, one end of resistance R 21, the other end ground connection of resistance R 21,76 pin of single-chip microcomputer U9 are through resistance R 20 ground connection.
6. ultrasonic flow meter as claimed in claim 5, it is characterized in that: 1 pin of the 74 pin wiring voltage stabilizer U12 of described single-chip microcomputer U9, 2 pin of linear voltage regulator U12 connect an end of capacitor C 22, one end of resistance R 22, the other end of capacitor C 22 connects 55 pin of single-chip microcomputer U9, another termination 3V power supply of resistance R 22 end of connecting resistance R23, one end of capacitor C 25, the end of the other end connecting resistance R24 of resistance R 23, one end of capacitor C 24, the end of the other end connecting resistance R25 of resistance R 24, one end of capacitor C 23, the other end of resistance R 25, the other end of capacitor C 23, the other end of capacitor C 24, the other end ground connection of capacitor C 25, 72 pin of single-chip microcomputer U9 connect the output terminal of amplifier U14.
7. ultrasonic flow meter as claimed in claim 6, it is characterized in that: described the first transmitting probe (1) connects 41 pin of single-chip microcomputer U9, the first receiving transducer (2) connects 42 pin of single-chip microcomputer U9, the second transmitting probe (3) connects 43 pin of single-chip microcomputer U9, the second receiving transducer (4) connects 44 pin of single-chip microcomputer U9, and display screen driver module U13 connects single-chip microcomputer U9.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840290A (en) * | 2017-01-10 | 2017-06-13 | 合肥工业大学 | A kind of high accuracy quadraphonic gas ultrasound wave current transmitter |
| CN107727176A (en) * | 2017-10-19 | 2018-02-23 | 西安安森智能仪器股份有限公司 | A kind of ultrasonic gas flowmeter and its flow-measuring method |
| CN107830882A (en) * | 2017-10-23 | 2018-03-23 | 中国联合网络通信集团有限公司 | Alarm method and device based on ultrasonic wave |
| CN111693766A (en) * | 2020-06-23 | 2020-09-22 | 重庆大全泰来电气有限公司 | System and method for calculating power factor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU428214A1 (en) * | 1972-01-11 | 1974-05-15 | В. И. Филатов | TWO-CHANNEL ULTRASONIC FLOWMETER |
| JPS57517A (en) * | 1980-06-02 | 1982-01-05 | Toshiba Corp | Ultrasonic flowmeter |
| CN1509405A (en) * | 2001-05-16 | 2004-06-30 | ��ʽ���綫������������� | Ultrasonic current meter |
| CN201133828Y (en) * | 2006-08-30 | 2008-10-15 | 北京金水中科科技有限公司 | Open channel ultrasound flow measurement system |
| CN102261937A (en) * | 2011-04-25 | 2011-11-30 | 西安交通大学 | High-accuracy time-difference type ultrasonic flow meter and method for measuring flow thereof |
| CN203502063U (en) * | 2013-09-26 | 2014-03-26 | 山东思达特测控设备有限公司 | Ultrasonic flowmeter enabling pipeline detection and self error correction |
-
2013
- 2013-09-26 CN CN201310442476.6A patent/CN103453957B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU428214A1 (en) * | 1972-01-11 | 1974-05-15 | В. И. Филатов | TWO-CHANNEL ULTRASONIC FLOWMETER |
| JPS57517A (en) * | 1980-06-02 | 1982-01-05 | Toshiba Corp | Ultrasonic flowmeter |
| CN1509405A (en) * | 2001-05-16 | 2004-06-30 | ��ʽ���綫������������� | Ultrasonic current meter |
| CN201133828Y (en) * | 2006-08-30 | 2008-10-15 | 北京金水中科科技有限公司 | Open channel ultrasound flow measurement system |
| CN102261937A (en) * | 2011-04-25 | 2011-11-30 | 西安交通大学 | High-accuracy time-difference type ultrasonic flow meter and method for measuring flow thereof |
| CN203502063U (en) * | 2013-09-26 | 2014-03-26 | 山东思达特测控设备有限公司 | Ultrasonic flowmeter enabling pipeline detection and self error correction |
Non-Patent Citations (1)
| Title |
|---|
| 杜海明: "伪码相关时差法超声波气体流量计的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑 》, no. 04, 15 April 2009 (2009-04-15) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840290A (en) * | 2017-01-10 | 2017-06-13 | 合肥工业大学 | A kind of high accuracy quadraphonic gas ultrasound wave current transmitter |
| CN107727176A (en) * | 2017-10-19 | 2018-02-23 | 西安安森智能仪器股份有限公司 | A kind of ultrasonic gas flowmeter and its flow-measuring method |
| CN107727176B (en) * | 2017-10-19 | 2023-12-26 | 西安安森智能仪器股份有限公司 | Ultrasonic gas flowmeter and flow measurement method thereof |
| CN107830882A (en) * | 2017-10-23 | 2018-03-23 | 中国联合网络通信集团有限公司 | Alarm method and device based on ultrasonic wave |
| CN111693766A (en) * | 2020-06-23 | 2020-09-22 | 重庆大全泰来电气有限公司 | System and method for calculating power factor |
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