CN111398672A - Ultrasonic power detection device and method thereof - Google Patents
Ultrasonic power detection device and method thereof Download PDFInfo
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- CN111398672A CN111398672A CN202010315245.9A CN202010315245A CN111398672A CN 111398672 A CN111398672 A CN 111398672A CN 202010315245 A CN202010315245 A CN 202010315245A CN 111398672 A CN111398672 A CN 111398672A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an ultrasonic power detection device and a method thereof. The sensing element senses the radiation force generated by the ultrasonic transducer to generate an ultrasonic radiation force signal. The resonant circuit converts the ultrasonic radiation force signal into a resonant current signal. The amplification circuit amplifies the resonant current signal. An arithmetic circuit processes the resonant current signal. The display is electrically connected with the calculation circuit, wherein the calculation circuit judges whether the amplitude of the resonance current signal is greater than a preset value, if so, the calculation circuit calculates the instantaneous power, the maximum instantaneous power, the average power and the output energy of the resonance current signal, and the display displays the instantaneous power, the maximum instantaneous power, the average power, the output energy, the resonance frequency and the amplitude of the resonance current signal; if not, the display displays the idle click information.
Description
Technical Field
The present invention relates to a power detection device and a method thereof, and more particularly, to an ultrasonic power detection device and a method thereof.
Background
The existing ultrasonic wave transducer energy control feedback control technology only monitors the resonance state of an excitation circuit, but cannot judge whether the energy and the power output by the ultrasonic wave transducer are normal or not, so that the idle-hit phenomenon is often caused.
Fig. 1A is a schematic diagram illustrating the balance of radiation force generated by a known ultrasonic transducer. Ultrasonic transducers such as Ultrasonic water wave meter (Ultrasonic water meter) of Ohmic instrument company are known to use the radiation force balance principle, which is to use a conical floating body floating in water, measure the force applied to the floating body by the Ultrasonic transducer by using the water buoyancy and the balance state of the force generated by the Ultrasonic transducer when the Ultrasonic transducer is triggered, and then convert the measured force into an increased power value. The ultrasonic transducer 11 is erected above the box body 12 and is arranged in the box body 12, wherein a certain amount of water 13 is arranged in the box body 12, the conical buoy 14 is arranged in the water 13, the center point of the conical buoy corresponds to the center of the ultrasonic transducer 11, the conical buoy 14 is connected to the connecting rod 15, when the ultrasonic transducer 11 acts, the ultrasonic radiation force is applied to the conical buoy 14 through the water 13, so that the conical buoy 14 slightly sinks to generate a lower pressure F, and the power value transmitted by the ultrasonic transducer 11 is converted by using the lower pressure F. However, this method does not respond to the instantaneous power of the ultrasonic transducer 11 by using the buoyancy of water, so that the instantaneous power cannot be calculated, and the measurement accuracy is easily affected by the vibration of the water 13. In addition, for the focusing ultrasonic transducer, because the applied pressure is not parallel downward, the applied pressure is different from the principle deduction, the converted power error is larger, the method is not suitable for measuring the focusing ultrasonic transducer, and the measurement cannot be effectively carried out under the unstable water body, when the focusing ultrasonic transducer is repeatedly triggered, the local temperature rises, the buoyancy of water is easily influenced, the numerical value measured for multiple times is unstable, the method is not suitable for the ultrasonic transducer with a movable push rod, when the push rod moves, the shaking directly influences the stability and the ground of the water body, the measured numerical value is deviated, and the measurement of the power value cannot be carried out.
Please refer to fig. 1B, which is a schematic diagram illustrating the ultrasonic focused energy inspection of the ultrasonic peeling machine of the prior art TWI 577415B. As shown in FIG. 1B, the ultrasonic skin-stretching machine 21 is used, a ceramic probe 22 is provided therein, ultrasonic waves S are generated by the ceramic probe 22, the ultrasonic waves S are focused between a biomaterial layer 23 and a base layer 24 through the biomaterial layer 23, a thermosetting point a is generated, and the ultrasonic energy is determined from the shape and size of the thermosetting point a. In the method, a measuring instrument is additionally used for observing the size generated by the thermal coagulation base point a as a comparison reference, the actual energy detection value cannot be directly measured, the energy change cannot be continuously observed at the same point, an effective measuring device cannot be formed, and the method is not suitable for energy measurement of non-focusing ultrasonic equipment.
The known US 6,691,578B 1 patent uses an ultrasonic transducer as a receiver for calibration and power measurement, which requires the placement of the transmitter and receiver in an external container and the use of a limited known transducer receiving frequency, which creates a calibration measurement loop that cannot operate at the unknown transducer receiving frequency nor be provided in the same ultrasonic probe to implement the feedback system.
As mentioned above, both methods described in fig. 1A and 1B cannot use ultrasonic waves and output them through the ultrasonic transducer at the same time to form a feedback control system for adjusting the output power or energy of the ultrasonic waves, and thus cannot directly determine whether there is a null-hit phenomenon. Moreover, in the prior art, the excitation frequency or the excitation time of the ultrasonic wave is adjusted and controlled by direct feedback control of the excitation voltage, but the method cannot know whether the actually excited ultrasonic wave radiation force reaches the required energy, and only can judge that the current ultrasonic transducer is in a working state. In other words, the known energy control feedback control technology of the ultrasonic transducer only monitors the resonance state of the excitation circuit, and cannot judge whether the real output energy and power of the transducer are normal, so that the idle-hit phenomenon is often caused.
Accordingly, how to provide an ultrasonic power detection apparatus and method to improve the above problems has become an urgent issue to be studied.
Disclosure of Invention
In view of the above problems, the present invention discloses an ultrasonic power detection device, which includes a sensing element, a resonant circuit, an amplifying circuit, a calculating circuit, and a display. The sensing element senses the radiation force generated by the ultrasonic transducer to generate an ultrasonic radiation force signal. The resonant circuit converts the ultrasonic radiation force signal into a resonant current signal. The amplification circuit amplifies the resonant current signal. An arithmetic circuit processes the resonant current signal. The display is electrically connected with the calculation circuit, wherein the calculation circuit judges whether the amplitude of the resonance current signal is greater than a preset value, if so, the calculation circuit calculates the instantaneous power, the maximum instantaneous power, the average power and the output energy of the resonance current signal, and the display displays the instantaneous power, the maximum instantaneous power, the average power, the output energy, the resonance frequency and the amplitude of the resonance current signal; if not, the display displays the idle click information.
In summary, the ultrasonic power detection apparatus and method of the present invention utilize micro-current generated by metal stress, and detect the ultrasonic output power and energy after resonance amplification, so as to directly determine whether the ultrasonic probe has a null-hit phenomenon.
Drawings
FIG. 1A is a schematic diagram illustrating a balance of radiation forces generated by a known ultrasonic transducer;
FIG. 1B is a schematic diagram showing the ultrasonic energy focusing inspection of a TWI577415B ultrasonic skin-stretching machine;
FIG. 2 is a block diagram of an ultrasonic power detection apparatus according to the present invention;
FIGS. 3A and 3B are a perspective view and a cross-sectional view of an ultrasonic power detection apparatus according to the present invention;
FIG. 4 is a flow chart illustrating the steps of the ultrasonic power detection method of the present invention; and
FIG. 5 is a signal timing diagram of the ultrasonic power detection apparatus according to the present invention.
Detailed Description
Please refer to fig. 2, which is a block diagram of an ultrasonic power detection apparatus according to the present invention. The ultrasonic power detection device 3 includes a sensing element 31, a resonance circuit 32, an amplification circuit 33, a calculation circuit 34, and a display 35. The sensing element 31 senses the radiation force generated by the ultrasonic transducer to generate an ultrasonic radiation force signal. The resonant circuit 32 converts the ultrasonic radiation force signal into a resonant current signal. The amplification circuit 33 amplifies the resonance current signal. The calculation circuit 34 processes the resonance current signal. The display 35 is electrically connected to the arithmetic circuit 34, wherein the arithmetic circuit 34 determines whether the amplitude of the resonant current signal is greater than a predetermined value, if so, the arithmetic circuit 34 calculates the instantaneous power, the maximum instantaneous power, the average power and the output energy of the resonant current signal, and the display 35 displays the instantaneous power, the maximum instantaneous power, the average power, the output energy, the resonant frequency and the amplitude of the resonant current signal; if not, the display 35 displays the idle click information.
Please refer to fig. 3A and fig. 3B, which are a perspective view and a cross-sectional view of an ultrasonic power detection apparatus according to the present invention. The sensing element 31 of the ultrasonic power detection apparatus 3 includes a metal rod or a metal sheet, and the material of the sensing element 31 includes copper, nickel, aluminum, zinc oxide or semiconductor material, which is illustrated as the metal rod M in fig. 3B, but the invention is not limited thereto. In addition, the shape of the sensing element 31 is a rod-like element or a sheet-like element, but not limited thereto. The resonant circuit 32, the amplifying circuit 33 and the operation circuit 34 of the ultrasonic power detection device 3 are disposed in a circuit board C, and the circuit board C is electrically connected to the metal rod M and the display 35 and disposed inside the housing 351 of the display 35. The ultrasonic power detection device 3 further includes a box B disposed on the housing 351 of the display 35, water is contained in the box B, the metal rod M is inserted into the water at the bottom of the box B from the housing 351 of the display 35, the ultrasonic probe U is also disposed in the water of the box B, and the method for detecting the ultrasonic power is as follows.
Please refer to fig. 4, which is a flowchart illustrating steps of an ultrasonic power detection method according to the present invention. The ultrasonic power detection method comprises the following steps: in step S41, the ultrasonic probe is turned on, so that the ultrasonic transducer of the ultrasonic probe generates a radiation force; in step S42, a radiation force generated by an ultrasonic transducer is sensed; in step S43, converting the radiation force into a resonant current; in step S44, amplifying the resonant current; in step S45, the resonant current is processed; in step S46, determining whether the amplitude of the resonant current is greater than a predetermined value; if yes, in step S47, calculating the instantaneous power, the maximum instantaneous power, the average power and the output energy of the resonant current, and displaying the instantaneous power, the maximum instantaneous power, the average power, the output energy, the resonant frequency and the amplitude of the resonant current; if not, in step S48, a blank click message is displayed.
The ultrasonic power detection method is as the block diagram part of fig. 2, the radiation force generated by the ultrasonic transducer is conducted to the sensing element 31 by water and is sensed by the sensing element 31, the sensing element 31 and the resonance circuit 32 form a complete detector by using the metal strain effect, the ultrasonic radiation force is converted into a current signal, the current signal is amplified by the amplifying circuit 33 and then enters the arithmetic circuit 34 for arithmetic operation, and the arithmetic result is displayed on the display 35. In one embodiment of the present invention, the calculation circuit 34 comprises a microprocessor circuit. In actual operation, a certain amount of water is put into the box body B, the ultrasonic probe U is fixed in the water body, after a power key of the display 35 is turned on, a correction key of the display 35 is pressed to perform zero value correction, then the power of the ultrasonic probe U is turned on, so that an ultrasonic transducer in the ultrasonic probe U generates radiation force, and the frequency, the amplitude, the energy and whether the ultrasonic transducer is in idle stroke or not can be displayed on the display 35.
Please refer to fig. 5, which is a timing diagram of the ultrasonic power detection apparatus according to the present invention. Fig. 5 shows a switch control signal, an excitation voltage signal, a radiation force signal, and a resonant current signal of the ultrasonic transducer from top to bottom, respectively. When the ultrasonic transducer is started, the switch control signal is at a high potential, and when the ultrasonic transducer is closed, the switch control signal is at a low potential. The excitation voltage signal is a high-frequency voltage signal in the form of a sine wave, and Vpp represents the excitation voltageThe normal condition of the excitation voltage is shown as a waveform a1, if the ultrasonic transducer and the component are aged, the peak-to-peak value of the excitation voltage can be reduced as shown as a waveform a2, if the ultrasonic transducer and the component cannot be excited normally, the peak-to-peak value of the excitation voltage can be reduced as shown as a waveform a3, or even zero, at this time, the normal state is shown as a waveform b1 corresponding to the ultrasonic radiation force signal output by the ultrasonic transducer, and the normal state is shown as a waveform b2 when the ultrasonic transducer and the component cannot be normally fired, the output is shown as a waveform b3, namely, so-called idle firing. At this time, the resonant current generated by the sensing element and the resonant circuit is input to the amplifying circuit, and the amplified resonant current is input to the arithmetic circuit to determine whether the ultrasonic transducer is in an on state, wherein the amplified resonant current signals are shown as waveforms c1, c2 and c 3. If the ultrasonic transducer is in the on state, calculating the frequency and amplitude of the resonant current, and when the amplitude of the resonant current is lower than or equal to the minimum value I of the resonant currentppminIf the resonant current is higher than the minimum value I of the resonant current, the display device displays the idle shock if the resonant current is judged to be idle shockppminAnd displaying the frequency and amplitude of the resonant current on a display, calculating parameters such as instantaneous power, maximum instantaneous power, average power, output energy and the like according to a formula, and displaying each parameter value on the display. The calculation formulas for the respective parameters are listed below.
Instantaneous power p (t) v (t) × i (t) VI (cos (θ)v-θi)-cos(2ωt+θv+θi) Maximum instantaneous power: pmax2VI, average power: pav(VI), wherein,
v (t): real-time resonant voltage; i (t): real-time resonant current; ω: a resonant angular frequency; thetav: real time resonant voltage angle, θiReal-time resonant current angle, P (t) instantaneous power, PavAverage power, PmaxMaximum instantaneous power. Outputting energy:
wherein
Further explaining the calculation mode of the k conversion factor, the conversion factor directly corresponds to the output power of the ultrasonic transducer,
wherein Ipp＝IRe×A，IrmsEffective value of resonant current, IRePrimary resonance current peak-to-peak value, which is the output current peak-to-peak value of the resonance circuit, IppPeak-to-peak value of the resonant current, Z0The resonance impedance is the output impedance of the resonance circuit, generally defined as the standard output impedance of the instrument of 50 ohms, W is the ultrasonic sound power, delta t is the action time, which is the opening time of the switch circuit of the ultrasonic transducer, k is the conversion factor, A is the amplification rate of the amplifier.
In summary, the ultrasonic power detection apparatus and method of the present invention utilize micro-current generated by metal stress to detect the ultrasonic output power and energy after resonant amplification, so as to directly determine whether the ultrasonic probe has a null-hit phenomenon.
Claims (10)
1. An ultrasonic power detection apparatus, comprising:
the sensing element senses a radiation force generated by an ultrasonic transducer so as to generate an ultrasonic radiation force signal;
a resonant circuit for converting the ultrasonic radiation force signal into a resonant current signal;
an amplifying circuit for amplifying the resonant current signal;
a calculation circuit for processing the resonance current signal; and
a display electrically connected to the arithmetic circuit;
wherein the arithmetic circuit judges whether an amplitude of the resonant current signal is greater than a preset value;
if yes, the arithmetic circuit calculates an instantaneous power, a maximum instantaneous power, an average power and an output energy of the resonance current signal, and the instantaneous power, the maximum instantaneous power, the average power, the output energy, a resonance frequency and an amplitude of the resonance current signal are displayed by the display;
if not, the display displays a null click message.
2. The ultrasonic power detection device of claim 1, wherein the sensing element comprises a metal rod or a metal sheet.
3. The ultrasonic power detection device of claim 2, wherein a material of the sensing element comprises copper, nickel, aluminum, zinc oxide or a semiconductor material.
4. The ultrasonic power detection device of claim 1, wherein the sensing element is a rod-like element or a sheet-like element.
5. The ultrasonic power detection device of claim 1, wherein the resonant circuit, the amplifying circuit and the calculating circuit are disposed in a circuit board, and the circuit board is electrically connected to the sensing element.
6. The ultrasonic power detection device of claim 5, further comprising a housing disposed on a housing of the display, wherein the housing contains water, the sensing element penetrates a bottom water of the housing from the housing of the display, and the ultrasonic transducer is disposed in the water.
7. An ultrasonic power detection method is characterized by comprising the following steps:
sensing a radiation force generated by an ultrasonic transducer;
converting the radiation force into a resonant current;
amplifying the resonant current; and
processing the resonance current;
wherein the step of processing the resonant current comprises determining whether an amplitude of the resonant current is greater than a predetermined value;
if yes, calculating an instantaneous power, a maximum instantaneous power, an average power and an output energy of the resonant current, and displaying the instantaneous power, the maximum instantaneous power, the average power, the output energy, a resonant frequency and an amplitude of the resonant current;
if not, displaying a null click message.
8. The method of claim 7, wherein the radiation force generated by the ultrasonic transducer is sensed by a sensing element.
9. The method of claim 7, wherein the sensing element comprises a metal rod or a metal sheet.
10. The method of claim 9, wherein a material of the sensing element comprises copper, nickel, aluminum, zinc oxide, or a semiconductor material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010315245.9A CN111398672A (en) | 2020-04-21 | 2020-04-21 | Ultrasonic power detection device and method thereof |
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| CN202010315245.9A CN111398672A (en) | 2020-04-21 | 2020-04-21 | Ultrasonic power detection device and method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2394209Y (en) * | 1999-11-03 | 2000-08-30 | 上海交通大学 | Large range ultrasonic power tester |
| CN101468347A (en) * | 2007-12-28 | 2009-07-01 | 北京奥麦特科技有限公司 | Automatic frequency tracking method of supersonic transducer and system thereof |
| CN102095485A (en) * | 2009-12-09 | 2011-06-15 | 中国计量科学研究院 | Portable ultrasonic field parameter measurement system and measurement method thereof |
| CN201935730U (en) * | 2010-12-07 | 2011-08-17 | 徐州雷奥医疗设备有限公司 | Ultrasonic power measuring device |
| CN102249367A (en) * | 2011-04-02 | 2011-11-23 | 河海大学常州校区 | Method for carrying out detection and control on ultrasonic intensity in water treatment |
| US20120046765A1 (en) * | 2010-08-20 | 2012-02-23 | Bio-Rad Laboratories, Inc. | System and method for ultrasonic transducer control |
| CN111398671A (en) * | 2020-04-08 | 2020-07-10 | 高昌生医股份有限公司 | Ultrasonic power detection feedback control device and method thereof |
-
2020
- 2020-04-21 CN CN202010315245.9A patent/CN111398672A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2394209Y (en) * | 1999-11-03 | 2000-08-30 | 上海交通大学 | Large range ultrasonic power tester |
| CN101468347A (en) * | 2007-12-28 | 2009-07-01 | 北京奥麦特科技有限公司 | Automatic frequency tracking method of supersonic transducer and system thereof |
| CN102095485A (en) * | 2009-12-09 | 2011-06-15 | 中国计量科学研究院 | Portable ultrasonic field parameter measurement system and measurement method thereof |
| US20120046765A1 (en) * | 2010-08-20 | 2012-02-23 | Bio-Rad Laboratories, Inc. | System and method for ultrasonic transducer control |
| CN201935730U (en) * | 2010-12-07 | 2011-08-17 | 徐州雷奥医疗设备有限公司 | Ultrasonic power measuring device |
| CN102249367A (en) * | 2011-04-02 | 2011-11-23 | 河海大学常州校区 | Method for carrying out detection and control on ultrasonic intensity in water treatment |
| CN111398671A (en) * | 2020-04-08 | 2020-07-10 | 高昌生医股份有限公司 | Ultrasonic power detection feedback control device and method thereof |
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