CN103901310A - Energy transducer line breaking detection method and system - Google Patents
Energy transducer line breaking detection method and system Download PDFInfo
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- CN103901310A CN103901310A CN201210570110.2A CN201210570110A CN103901310A CN 103901310 A CN103901310 A CN 103901310A CN 201210570110 A CN201210570110 A CN 201210570110A CN 103901310 A CN103901310 A CN 103901310A
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- transducer
- pulse
- remained shock
- ultrasonic pulse
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0215—Driving circuits for generating pulses, e.g. bursts of oscillations, envelopes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/40—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups with testing, calibrating, safety devices, built-in protection, construction details
Abstract
The invention discloses an energy transducer line breaking detection method and system. The method comprises: an ultrasonic pulse generator generating pulse signals, wherein the pulse signal drives an energy transducer through an energy transducer driver to enable the energy transducer to send a corresponding number of ultrasonic pulses according to the number configuration of the pulse signals; and when the sending of the ultrasonic pulses ends, opening window logic, utilizing a measuring control module to measure aftershock pulses outputted by a voltage comparison amplifier, and determining whether a line breaks in the energy transducer by calculating the time difference of neighboring aftershock pulses or the number of the aftershock pulses. According to the invention, by utilizing the characteristics of the energy transducer itself, while line breaking of the energy transducer is detected, an empty pipe can also be determined, thus the adaptation capability of a supersonic wave metering device is greatly improved.
Description
Technical field
The present invention relates to measurement field, be specifically related to a kind of transducer wire break detection method and system of using ultrasonic wave principle to measure.
Background technology
Use ultrasonic wave principle to measure fluid velocity and flow to have that precision is high, good reliability, without advantages such as any movable parts, can extensively substitute traditional mechanical motion formula measurement.Supersonic wave metering instrument forms with the measurement pipe fitting that two ultrasonic transducers have been installed by measuring control module.Because outer lead is used in their connection, need to detect the reliability connecting and the quality of transducer, and need to report cannot measure when breaking down time.
Ultrasonic transducer is a kind of electric energy and mechanical energy to be carried out to the device of conversion mutually, and it is stopping still there is short time remained shock after excitation, and mechanical vibration can be converted to ultra-weak electronic signal.Around this principle, measure control module and sending after ultrasonic pulse, detect the electric signal of passing back on transducer, if there is ultrasonic vibration, can think that ultrasonic transducer is working properly at once.Otherwise, if can't detect, show that line interrupts, or ultrasonic transducer lost efficacy.
Fig. 1 is a kind of common ultrasonic measurement system structural drawing.In the time measuring flow velocity, transducer A and transducer B receive and dispatch each other, measure ultrasonic pulse and send from a transducer, till arriving another transducer.
Prior art has two kinds of wire break detection methods: 1) at resistance of the two poles of the earth of transducer cross-over connection, in transducer driver, add pull-up resistor (its resistance is much smaller than the resistance of the resistance of institute's cross-over connection) and judge the logical value on line, 0 shows not broken string if; 2) do not add any device and normally measure, if can't detect ultrasound wave at receiving end, think that measuring condition is false.
There are some restrictions in said method: what method 1 detected is in fact, and whether line adds resistance disconnect, and not with respect to transducer, likely fails to judge; Method 2 cannot distinguish blank pipe and broken string, and resolution characteristic is inadequate, needs to increase in addition empty pipe detection circuitry.
Summary of the invention
(1) technical matters that will solve
The present invention likely fails to judge while mainly solving transducer burn out detection in prior art, resolution capability not and need to increase in addition the technical matters of testing circuit.
(2) technical scheme
The invention provides a kind of transducer wire break detection method, for the ultrasound measurement system that comprises transducer, transducer driver, measurement control module, ultrasonic pulse generator, reference voltage generator, voltage comparison amplifier, window logic and time measurement module, comprise the following steps:
S1, described ultrasonic pulse generator produce pulse signal, and described pulse signal drives described transducer by described transducer driver, make described transducer send the ultrasonic pulse of corresponding number by the number configuration of described pulse signal;
S2, after described ultrasonic pulse sends and finishes, open described window logic, use described measurement control module to measure the remained shock pulse of described voltage comparison amplifier output, judge by calculating the mistiming of adjacent remained shock pulse or the number of remained shock pulse whether transducer breaks.
Optionally, before described step S1, further comprising the steps:
Between described transducer and described voltage comparison amplifier, increase clamp diode.
Optionally, described step S2 specifically comprises:
After described ultrasonic pulse transmission finishes, use described measurement control module to measure the rising edge of continuous several remained shock pulses of described voltage comparison amplifier output or the described transducer of negative edge distance to send the time of ultrasonic pulse, obtain some time value, if the difference of described adjacent time value is consistent with cycle or the semiperiod of described ultrasonic pulse, show that described transducer connects normal.
Optionally, after above-mentioned steps S2, further comprise the step that blank pipe detects:
If sent after ultrasonic pulse finishes at described transducer, delay scheduled time is opened described window logic still can detect remained shock pulse, shows blank pipe.
Optionally, described step S2 specifically comprises:
After described ultrasonic pulse transmission finishes, extremely described ultrasonic pulse arrived in the time of another transducer, use remained shock counter to calculate the number of remained shock rising edge of a pulse or negative edge, judge whether the length of remained shock and time of vibration according to count value, thereby judge whether blank pipe, whether break.
The present invention also provides a kind of transducer broken wire detection system, this system comprises the first transducer, the second transducer, transducer driver, measurement control module, ultrasonic pulse generator, reference voltage generator, voltage comparison amplifier, window logic and time measurement module, wherein:
Described the first transducer and the second transducer are received and dispatched each other, for mechanical vibration are converted to electric signal;
Described transducer driver is connected with described measurement control module with described transducer, for driving transducer work;
Described measurement control module is connected with described transducer driver with described ultrasonic pulse generator, described time measurement module, for measuring remained shock pulse signal;
Described ultrasonic pulse generator is connected with described time measurement module with described measurement control module, for generation of pulse signal;
Described reference voltage generator is connected with described voltage comparison amplifier, for outputting standard reference voltage;
Described voltage comparison amplifier is connected with described the first transducer, described the second transducer, described reference voltage generator and described window logic, for comparing remained shock voltage signal and reference voltage;
Described in described window logical and, voltage comparison amplifier is connected with described time measurement module, for controlling the opportunity that starts to measure remained shock signal;
Described time measurement module is connected with described window logic, described ultrasonic pulse generator and described measurement control module, for carrying out time measurement.
Optionally, between described the first transducer or the second transducer and described voltage comparison amplifier, increase a clamp diode, during remained shock, produce too high voltage for preventing.
Optionally, between described measurement control module and described voltage comparison amplifier, increase a remained shock counter, for calculating the number of remained shock pulse.
(3) beneficial effect
The present invention utilizes the characteristic of transducer itself, in detecting transducer broken string/inefficacy, can also judge blank pipe, has greatly improved the adaptive faculty of supersonic wave metering instrument.
Brief description of the drawings
Fig. 1 is common ultrasonic measurement system structural drawing;
Fig. 2 is the process flow diagram of the inventive method;
Fig. 3 is the ultrasonic measurement system structural drawing in embodiment 1;
Fig. 4 is the remained shock instrumentation plan in embodiment 1;
Fig. 5 is the ultrasonic measurement system structural drawing in embodiment 2;
Fig. 6 is the remained shock instrumentation plan in embodiment 2.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Fig. 2 is the process flow diagram of the inventive method, the invention provides a kind of transducer wire break detection method, for the ultrasound measurement system that comprises transducer, transducer driver, measurement control module, ultrasonic pulse generator, reference voltage generator, voltage comparison amplifier, window logic and time measurement module, comprise the following steps:
S1, described ultrasonic pulse generator produce pulse signal, and described pulse signal drives described transducer by described transducer driver, make described transducer send the ultrasonic pulse of corresponding number by the number configuration of described pulse signal;
S2, after described ultrasonic pulse sends and finishes, open described window logic, use described measurement control module to measure the remained shock pulse of described voltage comparison amplifier output, judge by calculating the mistiming of adjacent remained shock pulse or the number of remained shock pulse whether transducer breaks.
Optionally, before described step S1, further comprising the steps:
Between described transducer and described voltage comparison amplifier, increase clamp diode.
Optionally, described step S2 specifically comprises:
After described ultrasonic pulse transmission finishes, use described measurement control module to measure the rising edge of continuous several remained shock pulses of described voltage comparison amplifier output or the described transducer of negative edge distance to send the time of ultrasonic pulse, obtain some time value, if the difference of described adjacent time value is consistent with cycle or the semiperiod of described ultrasonic pulse, show that described transducer connects normal.
Optionally, after above-mentioned steps S2, further comprise the step that blank pipe detects:
If sent after ultrasonic pulse finishes at described transducer, delay scheduled time is opened described window logic still can detect remained shock pulse, shows blank pipe.
Optionally, described step S2 specifically comprises:
After described ultrasonic pulse transmission finishes, extremely described ultrasonic pulse arrived in the time of another transducer, use remained shock counter to calculate the number of remained shock rising edge of a pulse or negative edge, judge whether the length of remained shock and time of vibration according to count value, thereby judge whether blank pipe, whether break.
The present invention also provides a kind of transducer broken wire detection system, this system comprises the first transducer, the second transducer, transducer driver, measurement control module, ultrasonic pulse generator, reference voltage generator, voltage comparison amplifier, window logic and time measurement module, wherein:
Described the first transducer and the second transducer are received and dispatched each other, for mechanical vibration are converted to electric signal;
Described transducer driver is connected with described measurement control module with described transducer, for driving transducer work;
Described measurement control module is connected with described transducer driver with described ultrasonic pulse generator, described time measurement module, for measuring remained shock pulse signal;
Described ultrasonic pulse generator is connected with described time measurement module with described measurement control module, for generation of pulse signal;
Described reference voltage generator is connected with described voltage comparison amplifier, for outputting standard reference voltage;
Described voltage comparison amplifier is connected with described the first transducer, described the second transducer, described reference voltage generator and described window logic, for comparing remained shock voltage signal and reference voltage;
Described in described window logical and, voltage comparison amplifier is connected with described time measurement module, for controlling the opportunity that starts to measure remained shock signal;
Described time measurement module is connected with described window logic, described ultrasonic pulse generator and described measurement control module, for carrying out time measurement.
Optionally, between described the first transducer or the second transducer and described voltage comparison amplifier, increase a clamp diode, during remained shock, produce too high voltage for preventing.
Optionally, between described measurement control module and described voltage comparison amplifier, increase a remained shock counter, for calculating the number of remained shock pulse.
Embodiment 1:
As shown in Figure 3, relatively common ultrasound measurement system, carries out following change:
A) increase clamp diode in the Stop input of transducer, to prevent producing too high voltage during transducer remained shock, cause analog switch electric leakage;
B) logic of control module is measured in amendment, measures according to the following steps (breaking as example to detect transducer A):
1) give capacitor C a charging: reference voltage generator outputting standard reference voltage, analog switch Sa/Sc closure, transducer driver Da output drives as low.
2) transducer A sends out ultrasound wave: disconnect Sc, reference voltage generator is exported than the voltage of canonical reference voltage higher (as high 20mV), to reduce environmental interference, the pulse signal of ultrasonic pulse generator drives transducer A by transducer driver Da, by the ultrasonic pulse of pulse number configuration output corresponding number.
3) remained shock is measured: after ultrasonic pulse transmission finishes, open window logic, measure continuous several pulse edges (upper edge or lower edge) distance of comparison amplifier output with measurement module and send out the time of ripple, measure some time value T1/T2/T3, if their difference is consistent with the cycle (or semiperiod) of ultrasonic pulse, mean that stop input detects remained shock signal, show that transducer connects normal.Fig. 4 is the remained shock instrumentation plan in the present embodiment.
4) blank pipe is measured: the remained shock time is relevant to pipeline conditions, when fluid full packages the remained shock time short, otherwise long, open window logic if postpone a period of time after ripple finishes, and time measurement module still can detect remained shock, show blank pipe.
Embodiment 2:
As shown in Figure 4, the present embodiment has increased a repercussions counter on the basis of above-described embodiment, reaches the function that detects broken string and blank pipe in normal measurement.
Postpone as example taking the transonic of measuring from transducer A to transducer B below, introduce the step of measuring:
1) give capacitor C a and Cb charging: reference voltage generator outputting standard reference voltage, analog switch Sa/Sb/Sc closure, transducer driver Da/Db output drives as low.
2) transducer A sends out ultrasound wave: disconnect Sc and Sb, reference voltage generator is exported than the voltage of canonical reference voltage higher (as high 20mV), to reduce environmental interference, the pulse signal of ultrasonic pulse generator drives transducer A by transducer driver Da, by the ultrasonic pulse of pulse number configuration output corresponding number.
3) remained shock is measured: ultrasonic pulse is sent and finished, and a period of time that sound wave does not also propagate into transducer B is defined as remained shock gate time, calculates by remained shock counter the rising edge number that comparison amplifier is exported.According to count value, can directly judge whether remained shock, and the length of time of vibration, thereby judge whether blank pipe, whether break.Fig. 6 is the remained shock instrumentation plan in the present embodiment.
4) time difference measurement: disconnect Sa, connect Sb, use conventional method to measure sound wave and arrive the time that transducer B holds.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (8)
1. a transducer wire break detection method, for the ultrasound measurement system that comprises transducer, transducer driver, measurement control module, ultrasonic pulse generator, reference voltage generator, voltage comparison amplifier, window logic and time measurement module, it is characterized in that, comprise the following steps:
S1, described ultrasonic pulse generator produce pulse signal, and described pulse signal drives described transducer by described transducer driver, make described transducer send the ultrasonic pulse of corresponding number by the number configuration of described pulse signal;
S2, after described ultrasonic pulse sends and finishes, open described window logic, use described measurement control module to measure the remained shock pulse of described voltage comparison amplifier output, judge by calculating the mistiming of adjacent remained shock pulse or the number of remained shock pulse whether transducer breaks.
2. the method for claim 1, is characterized in that, before described step S1, further comprising the steps:
Between described transducer and described voltage comparison amplifier, increase clamp diode.
3. the method for claim 1, is characterized in that, described step S2 specifically comprises:
After described ultrasonic pulse transmission finishes, use described measurement control module to measure the rising edge of continuous several remained shock pulses of described voltage comparison amplifier output or the described transducer of negative edge distance to send the time of ultrasonic pulse, obtain some time value, if the difference of described adjacent time value is consistent with cycle or the semiperiod of described ultrasonic pulse, show that described transducer connects normal.
4. method as claimed in claim 3, is characterized in that, after described step S2, further comprises the step that blank pipe detects:
If sent after ultrasonic pulse finishes at described transducer, delay scheduled time is opened described window logic still can detect remained shock pulse, shows blank pipe.
5. the method for claim 1, is characterized in that, described step S2 specifically comprises:
After described ultrasonic pulse transmission finishes, extremely described ultrasonic pulse arrived in the time of another transducer, use remained shock counter to calculate the number of remained shock rising edge of a pulse or negative edge, judge whether the length of remained shock and time of vibration according to count value, thereby judge whether blank pipe, whether break.
6. a transducer broken wire detection system, it is characterized in that, this system comprises the first transducer, the second transducer, transducer driver, measurement control module, ultrasonic pulse generator, reference voltage generator, voltage comparison amplifier, window logic and time measurement module, wherein:
Described the first transducer and the second transducer are received and dispatched each other, for mechanical vibration are converted to electric signal;
Described transducer driver is connected with described measurement control module with described transducer, for driving transducer work;
Described measurement control module is connected with described transducer driver with described ultrasonic pulse generator, described time measurement module, for measuring remained shock pulse signal;
Described ultrasonic pulse generator is connected with described time measurement module with described measurement control module, for generation of pulse signal;
Described reference voltage generator is connected with described voltage comparison amplifier, for outputting standard reference voltage;
Described voltage comparison amplifier is connected with described the first transducer, described the second transducer, described reference voltage generator and described window logic, for comparing remained shock voltage signal and reference voltage;
Described in described window logical and, voltage comparison amplifier is connected with described time measurement module, for controlling the opportunity that starts to measure remained shock signal;
Described time measurement module is connected with described window logic, described ultrasonic pulse generator and described measurement control module, for carrying out time measurement.
7. system as claimed in claim 6, is characterized in that, between described the first transducer or the second transducer and described voltage comparison amplifier, increases a clamp diode, produces too high voltage for preventing during remained shock.
8. the system as described in claim 6 or 7, is characterized in that, between described measurement control module and described voltage comparison amplifier, increases a remained shock counter, for calculating the number of remained shock pulse.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210570110.2A CN103901310A (en) | 2012-12-25 | 2012-12-25 | Energy transducer line breaking detection method and system |
| PCT/CN2013/082056 WO2014101440A1 (en) | 2012-12-25 | 2013-08-22 | Method and system for detecting disconnected transducer wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210570110.2A CN103901310A (en) | 2012-12-25 | 2012-12-25 | Energy transducer line breaking detection method and system |
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| CN103901310A true CN103901310A (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210570110.2A Pending CN103901310A (en) | 2012-12-25 | 2012-12-25 | Energy transducer line breaking detection method and system |
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| Country | Link |
|---|---|
| CN (1) | CN103901310A (en) |
| WO (1) | WO2014101440A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634424A (en) * | 2015-03-04 | 2015-05-20 | 姜跃炜 | Method of detecting state of ultrasonic flowmeter |
| CN105892560A (en) * | 2016-03-29 | 2016-08-24 | 杭州和利时自动化有限公司 | Clock detection method and system used for embedded system |
| CN105891617A (en) * | 2014-09-05 | 2016-08-24 | 济南希声计量技术有限公司 | Performance tester for supersonic transducer |
| WO2023197956A1 (en) * | 2022-04-15 | 2023-10-19 | 深圳市帝拓电子有限公司 | Substance parameter detection method and circuit |
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| CN2062458U (en) * | 1989-12-29 | 1990-09-19 | 烟台航海学会 | Ultrasonic wave transducer testing device |
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| US20090240453A1 (en) * | 2008-03-19 | 2009-09-24 | Daniel Measurement And Control, Inc. | Method and system of determining forthcoming failure of transducers |
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| CN102589626A (en) * | 2012-01-20 | 2012-07-18 | 北京嘉洁能科技有限公司 | High-resolution time measurement and processing device and measurement method thereof |
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| CN2062458U (en) * | 1989-12-29 | 1990-09-19 | 烟台航海学会 | Ultrasonic wave transducer testing device |
| US5572219A (en) * | 1995-07-07 | 1996-11-05 | General Electric Company | Method and apparatus for remotely calibrating a phased array system used for satellite communication |
| US20090240453A1 (en) * | 2008-03-19 | 2009-09-24 | Daniel Measurement And Control, Inc. | Method and system of determining forthcoming failure of transducers |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105891617A (en) * | 2014-09-05 | 2016-08-24 | 济南希声计量技术有限公司 | Performance tester for supersonic transducer |
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| WO2023197956A1 (en) * | 2022-04-15 | 2023-10-19 | 深圳市帝拓电子有限公司 | Substance parameter detection method and circuit |
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| Publication number | Publication date |
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| WO2014101440A1 (en) | 2014-07-03 |
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Application publication date: 20140702 |