CN103635956A - Method and appparatus for actively damping an acoustic transducer - Google Patents
Method and appparatus for actively damping an acoustic transducer Download PDFInfo
- Publication number
- CN103635956A CN103635956A CN201280026994.3A CN201280026994A CN103635956A CN 103635956 A CN103635956 A CN 103635956A CN 201280026994 A CN201280026994 A CN 201280026994A CN 103635956 A CN103635956 A CN 103635956A
- Authority
- CN
- China
- Prior art keywords
- acoustic transducer
- converter
- oscillation amplitude
- signal
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000013016 damping Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims description 31
- 230000010355 oscillation Effects 0.000 claims abstract description 64
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000001052 transient effect Effects 0.000 description 10
- 230000005284 excitation Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Gyroscopes (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention allows active damping for almost all acoustic transducers, in which the present oscillation amplitude of the acoustic transducer is determined and a damping signal is applied to the acoustic transducer on the basis of the present oscillation amplitude. In this regard, the invention provides for a detection step (220) to involve specific prompting and measurement of a phase rotation for the oscillation in the acoustic transducer, preferably by means of a voltage pulse. The present oscillation amplitude is calculated by using known variables, which comprise the phase rotation and the phase angle of the oscillation at the time at which the phase rotation was prompted. The damping signal can be produced and adjusted on the basis of the present oscillation amplitude which is now known.
Description
Technical field
The present invention relates to a kind of method of the active damping for acoustic transducer, described acoustic transducer is in order to be for example used in vehicle by means of acoustic signal scanning surrounding environment.The invention still further relates to a kind of for realizing the device of such method.
Background technology
In art of the present invention field, that is to say known following methods in the field of the acoustic scan of environment around: the pulse that described method is included in transmitted in surrounding environment and is received in there reflection, to can infer the spacing with target by analyzing and processing.
The converter using is the chaffy acoustic transducer of tool, and described diaphragm has certain mass necessarily, and wherein diaphragm also has elastic force, thereby produces transient state vibration behavior.Piezoelectric transducer has identical behavior for its piezoelectric layer.Transient state vibration after excitation is less desirable for a variety of reasons in advance, especially the minimum spacing determining thus of measuring due to surrounding environment, because only, when vibration (as the result of prior excitation) decays as far as possible, converter just can be as the receiver of the sound reflecting in target.For the distance with converter, be less than the target of minimum interval, the sound wave reflecting also arrives on diaphragm and because the transmitted remained shock also existing can not be distinguished with transmitted and can not be identified thus during transient state vibration duration.
Therefore be known that except self-damping and additionally by means of damping element, carry out damped diaphragm passively, wherein for example use foam.Yet, significantly reduced thus on two conversion directions, the sensitivity while being sending and receiving acoustic impluse.
For example known by application DE10136628A1: active damping diaphragm, its mode is, in order to suppress transient state vibration, applies contrary signal on converter, wherein said antihunt signal causes amplitude to reduce with the stack that transient state is vibrated.The reception preparation of active damping for reducing the transient state vibration duration of diaphragm after sending acoustic energy and therefore earlier rebuilding sensor.The length of transient state vibration duration determines that at this I between sensor and barrier measures spacing.
In addition method or the device for the active damping of acoustic transducer by DE102010039017 cicada.Detect there the current vibration frequency of converter and apply the antihunt signal with the frequency identical with detected current vibration frequency.
Known sensor for the acoustic scan of the surrounding environment of vehicle forms by acoustic transducer with for controlling the electronic installation of acoustic transducer.Acoustic transducer is comprised of aluminium pot and the piezoelectric element being fixed in described aluminium pot again.The equivalent circuit diagram of acoustic transducer is shown in Figure 1 and comprise by R, L and C
serthe series connection oscillation circuit and the shunt capacitance C that form
par.Oscillation Amplitude is presented as the amplitude of the electric current that flows through inductance L and not directly measures on the terminal of acoustic transducer in the equivalent circuit diagram of acoustic transducer.
By shunt capacitance C
paron the direct measurement of voltage can infer the amplitude of the electric current in inductance L.Yet except the amplification factor of used measurement/analyzing and processing circuit, the value of all members of equivalent electrical circuit must be known for this reason.These values depend on consumingly environmental impact and manufacturing tolerance and therefore cannot enough accurately illustrate.
Therefore, by the known method of prior art, save the measurement of current Oscillation Amplitude or measure and use conventional A/D converter for Oscillation Amplitude.This has following shortcoming: the use of A/D converter needs extra hardware spending in order to determine Oscillation Amplitude.
If current Oscillation Amplitude is unknown, cannot be during range observation the parameter of damping adjusting signal again, but must ask for these parameters at calibration phase.This reduces the degree of accuracy of distance measurement.
Summary of the invention
The present invention can realize the active damping of nearly all acoustic transducer, wherein determines the current Oscillation Amplitude of acoustic transducer and in acoustic transducer, applies antihunt signal according to described current Oscillation Amplitude.
The invention has the advantages that there is no extra hardware expense---for example, A/D converter in the situation that and in the situation that do not know that each value of equivalent electrical circuit asks for the current Oscillation Amplitude of converter with pinpoint accuracy and high time resolution.
The phase rotating that is preferably caused targetedly and measured the vibration of acoustic transducer by potential pulse in detecting step, is proposed according to the present invention for this reason.By means of known parameter, implement the calculating of current Oscillation Amplitude, described parameter comprises phase rotating and the phase position in the moment of described vibration before phase rotating.Can produce according to now known current Oscillation Amplitude and damping adjusting signal again.
Preferably, at this according to duration and/or the amplitude of the current Oscillation Amplitude damping adjusting signal of converter.Realize thus the quick and efficient active damping of acoustic transducer.Can there is thus the scanning of pinpoint accuracy and high-resolution surrounding environment, because the object that the of short duration state vibration duration by final generation obtains being scanned and the little minimum spacing of sensor.
Preferably cause phase rotating, its mode is in acoustic transducer, to apply potential pulse.Corresponding to the zero moment of the friendship of converter Oscillation Amplitude, do not applying described potential pulse.Potential pulse causes the phase rotating of the vibration of converter, measures described phase rotating and can calculate current Oscillation Amplitude by described phase rotating.
Potential pulse preferably forms by a single edge or by one or more rectangle half-waves.This has the following advantages: not only edge but also rect.p. can produce simply and be applied in acoustic transducer.Preferably there is the more pinpoint accuracy that higher hamonic wave that a plurality of half-waves corresponding to the frequency of the current vibration frequency of converter produce due to smaller amounts obtains determining current Oscillation Amplitude.More the vibration of high-order is called higher hamonic wave, and it by applying potential pulse and produce and it can disturbing measurement and the infringement degree of accuracy of current Oscillation Amplitude in acoustic transducer.By applying the potential pulse by a plurality of half wave components, the impact of higher hamonic wave is minimized.In this case, should when calculating current Oscillation Amplitude, consider the passive damping of oscillation circuit.
Preferably, be provided with additional detecting step, wherein the current vibration frequency (resonance frequency) of detection of acoustic converter for this reason.This can be for example by being realized by the known measuring method of prior art.
Antihunt signal depends on current Oscillation Amplitude and preferably with current vibration frequency, is applied on converter according to the present invention.Obtain thus the damping of the further optimization of converter vibration.
The present invention realizes by means of a kind of device of the active damping for acoustic transducer.Described device has pick-up unit, and it is connected with converter.Described pick-up unit can be asked for current Oscillation Amplitude, its mode is, described pick-up unit particularly comes analyzing and processing to come from the measuring-signal of converter by means of counter and friendship zero recognizer, summit measurement mechanism or other mechanisms of digit phase indicator, clock control, described measuring-signal comprises the information about the phase rotating of the vibration of converter, to ask for the phase position of signal.Described pick-up unit is provided for detecting the relative phase position between two or more same signal change procedures, preferably hands over zero.
Described device also comprises signal generator, and it is connected with converter and is connected with the pick-up unit for definite current Oscillation Amplitude.Signal generator can produce potential pulse and is applied on converter, and described potential pulse produces the phase rotating of converter vibration.Signal generator can produce damping pulse in addition, the current Oscillation Amplitude that wherein signal generator is received by pick-up unit before considering when producing damping pulse and phase position and duration and/or the amplitude of damping pulse are for example provided according to described current Oscillation Amplitude and phase position.Signal generator can aspect phase place, revolt at least partly in addition converter vibration operation damping pulse is provided.Signal generator is by being applied to the potential pulse for generation of phase rotating and damping pulse on converter with being connected of converter.Alternatively, described device also can comprise different signal generators, and they are connected with converter, be wherein respectively equipped with for generation of pumping signal, for cause converter vibration phase rotating and for generation of the signal generator of antihunt signal.
According to a kind of preferred implementation, described device comprises storer, can store the Oscillation Amplitude of current detection in described storer, and wherein storer is also connected with signal generator, described signal generator can call current Oscillation Amplitude, to provide damping pulse according to Oscillation Amplitude.Signal generator can be binary or ternary output stage, and wherein ternary output stage is also switched in high internal resistance in zero condition.
In a kind of preferred implementation, pick-up unit is additionally provided for detecting converter or comes from the current vibration frequency of the measuring-signal of converter.This can for example realize by ranging pulse, by described ranging pulse excitation transducer and detected the self-excited oscillation frequency of converter by pick-up unit in short time.Can use these additional informations, to apply, there is current vibration frequency but the damping pulse of contrary phase position substantially obtains the damping of the further improvement of converter thus on converter.
Accompanying drawing explanation
Fig. 1 illustrates the equivalent circuit diagram of acoustic transducer;
Fig. 2 is in the vibration of acoustic transducer shown in polar plot;
Fig. 3 shown in polar plot according to the vibration of the acoustic transducer of prior art and active damping;
Fig. 4 a illustrates the potential pulse for damping acoustic transducer according to the first embodiment of the present invention;
Fig. 4 b shown in polar plot according to the vibration of the acoustic transducer of the first embodiment of the present invention with by means of the active damping of the potential pulse in Fig. 4 a;
Fig. 5 a illustrates the potential pulse for damping acoustic transducer according to a second embodiment of the present invention;
Fig. 5 b is in the vibration of acoustic transducer according to a second embodiment of the present invention shown in polar plot with by means of the active damping of the potential pulse in Fig. 5 b;
Fig. 6 is schematically illustrated according to the embodiment of device of the present invention;
Fig. 7 illustrates for further illustrating the diagram of the method according to this invention.
Embodiment
Fig. 1 illustrates equivalent electrical circuit Fig. 1 of acoustic transducer.It comprises by R, L and C
serthe series connection oscillation circuit and the shunt capacitance C that form
par.The Oscillation Amplitude of described acoustic transducer shows as the electric current I that flows through inductance L in the equivalent circuit diagram of acoustic transducer
lamplitude.
The direction along arrow 80 that Fig. 2 conduct in polar plot 2 is counterclockwise is with angular velocity omega
0the vector 10 of rotation illustrates the vibration of described acoustic transducer.Angular velocity omega
0directly by equation ω
0=2 π f
0resonance frequency f with acoustical convertor
0be associated.The length of vector 10 at this corresponding to the voltage U in inductance L in handing over zero point at electric current
max.During a vibration period, the circular trace 20 illustrating has been described at the tip of voltage vector 10.The horizontal ordinate of figure relates to the voltage U in inductance L
l, ordinate relate to flow through inductance L with ω
0the standardized electric current I of L
l.Electric current I
lthe tolerance of the current Oscillation Amplitude of acoustic transducer.Vibration is passed through the phase angle between arrow 10 and the horizontal ordinate of figure at the current phase position of moment t
represent.In this figure and figure subsequently, in order to simplify, the passive damping being caused by resistance R is not shown.In the situation that considering passive damping, vector length reduces exponentially and vector tip is not described circular trace and described log spiral.
The active damping of acoustic transducer is according to conventional methods shown according to the polar plot 2 of introducing in Fig. 2 in Fig. 3.In the electric current I of vibrating or flow through inductance L
lfriendship zero constantly and amplitude U
bvoltage inversion ground control described acoustic transducer.By arrow 30, described potential pulse is shown in the drawings.Obtain new circular trace 22, it has and has reduced value U
bradius 12.This is corresponding to the Oscillation Amplitude of described acoustic transducer, and it is less than the Oscillation Amplitude before applying antihunt signal.By flowing through the electric current I of inductance L
lfriendship zero constantly anti-phase control acoustic transducer obtain the damping of maximum possible.By the electric parameter U in oscillation circuit
land I
lthe vibration phase position representing is constant in this maintenance, as can be identified by the parallel orientation of arrow 10 and 12 in polar plot 1.
Fig. 4 illustrates according to the detecting step of the first embodiment of damping method of the present invention.Fig. 4 b represents in polar plot 3 according to the vibration of the converter of equivalent circuit diagram at this.Not in vibration or electric current I
lfriendship zero in control acoustic transducer, and at the phase angle corresponding to vibration
moment t
1control acoustic transducer, by voltage vector 10, illustrate.If be engraved in the potential pulse 40 shown in Fig. 4 a to there is amplitude U when described
bthe form at edge be applied in acoustic transducer, except comparing less damping with control shown in Figure 3, also obtain the phase rotation angle of the electric parameter in oscillation circuit
.Potential pulse 40 in polar plot 3 by thering is amplitude U
barrow 30 represent.Vibration for acoustic transducer obtains having amplitude a
2 voltage vector 14, corresponding to circular trace 24.Before applying potential pulse 40 or afterwards can be as follows by known parameter
with
calculate the Oscillation Amplitude of acoustic transducer.
Oscillation Amplitude a
1before applying potential pulse 40:
Oscillation Amplitude a
2after applying potential pulse 40:
Subsequently can be by calculated amplitude a
1and/or a
2in the situation that having or do not there is pre-resistor, determine the duration of antihunt signal.In addition, can be used as calculated amplitude a
1and/or a
2in at least one function determine the amplitude of antihunt signal.Advantageously, relatively when the amplitude of the amplitude of pre-test with the range observation cycle of implementing before, and duration and/or the amplitude of according to determined variation, mating linearly antihunt signal.Can be by conventional methods by the anti-phase control substantially of acoustic transducer, implement active damping.Alternatively, the amplitude of calculating also can be with the basis of additive method that acts on the damping of remained shock, for example, for according to the method for DE102010062930.8.
Fig. 5 a and 5b illustrate according to the detecting step of the second embodiment of damping method of the present invention.Shown at Fig. 5 a, substitute single edge and use by two rectangle half-waves, i.e. a positive half-wave 52 and a potential pulse 50 that negative half-wave 54 forms.The frequency of pulse 50 equals the vibration frequency f of converter vibration in described example
0.This means, the end of potential pulse 50 is t constantly
3with the t zero hour
1between difference just equal the cycle time T=1/f of the vector in polar plot 4
0, f wherein
0it is the vibration frequency of converter.So the end of the first half-wave 52 moment t
2corresponding to circulating in half vector.
Shown in the polar plot 4 in Fig. 5 b, the form by potential pulse 50 obtains three damping arrows 36,37 and 38.At moment t
1(corresponding to phase position
) on converter, apply and there is amplitude+U
bvoltage 55.As apparent in polar plot 4, this causes original amplitude a with like the example class of describing in Fig. 4
1damping (illustrating by arrow 10) and angle
phase rotating, thereby for the Oscillation Amplitude in polar plot 4, obtain corresponding to amplitude a
2arrow 14.At moment t
2on converter, apply voltage-U
b.This changes 56 values-2U corresponding to voltage
b.As apparent in polar plot 4, representative converter is at moment t
2the voltage vector 16 of vibration with respect to voltage vector 14 Rotate 180s ° (corresponding to t
1and t
2between time period in half cycles).Voltage changes 56 and causes further damping and angle
phase step.Thus at moment t
2after applying voltage 56, obtain having amplitude a
4voltage vector 18.At moment t
3, the voltage applying turns back to zero, corresponding to+U
bchange in voltage 57.T
2with t
3between time period again corresponding to the circulation of half vector or half vibration period T of converter.Converter is at moment t
3vibration by voltage vector 19, represent, it has rotated 180 ° with respect to voltage vector 18.Change in voltage 57 apply further damping and the angle that causes Oscillation Amplitude
phase step.In polar plot 4, obtain voltage vector 15.Voltage vector 15 is compared and is had phase shift with voltage vector 10
this is corresponding to the phase rotating of converter vibration, and it causes by applying potential pulse 50.
Can ask for phase rotating by thering is the measurement of pinpoint accuracy
.Can be by phase rotating
calculate current Oscillation Amplitude a
1(or calculate a according to potential pulse
2n+1).At this, must consider the passive damping being caused by resistance R, it does not illustrate for reason clearly in polar plot 4.The calculating of amplitude is suitable for having amplitude U conventionally
bthe potential pulse of a plurality of half-waves, n is in the quantity of this explanation half-wave.Applicable at this:
Applicable at this:
wherein
the passive damping constant that represents oscillation circuit.Can determine parameter
, its mode is, excited oscillation loop and measuring in the situation that there is no active damping the transient oscillation duration.Subsequently, after failure of oscillation, again with amplitude excitation oscillation circuit doubly of k and measure equally the transient oscillation duration.Can according to following formula, calculate damping constant by the poor dt of two transient state vibration durations:
Alternatively, can be by the calculative determination variable by the parameter of equivalent electrical circuit according to relevant known method
.
Figure 6 illustrates according to the schematic circuit of the device for active damping of the present invention preferred implementation.Described device comprises converter 100, and it has two links 102,104.On the one hand, these links are connected with the signal generator 110 of device, and described signal generator encourages described converter.Signal generator 110 is constructed according to the invention for apply potential pulse on link 102 and 104, and described potential pulse has moved angle with respect to the vibration phase of diaphragm
and cause the angle of diaphragm vibration
phase rotating.This can be during the excitation phase of converter or carries out at the excitation interval of converter.
In addition, link 102,104 is connected with pick-up unit 120 according to the present invention, and wherein link 102,104 excitation phase at signal generator 110 or excitation interval provide a signal, the motion of the diaphragm of described signal reflection converter 100.Described motion by pick-up unit 120 by detecting with being connected of link 102,104.Pick-up unit 120 comprises phase detection unit 124, by means of described phase detection unit, can detect phase information, the particularly phase shift that is applied to the signal on link 102,104.Pick-up unit also has frequency measurement unit 122, and it allows pick-up unit 120 to detect the frequency of the signal on link 102,104.
Can be in the situation that participate in the constant phase rotating that measures with considerable accuracy working time of the member of measurement
.Phase detection unit 124 comprises the digit phase indicator for example carrying in digital circuit for this reason.Can measure in the following manner: in realization, be used for causing phase rotating
the moment t of potential pulse
1make electrogoniometer synchronize with the curent change process in inductance L before.During applying potential pulse, digit phase indicator comprises electric current I
lat moment t
1original phase position
.According to antihunt signal, determine in esse phase position
and the content of itself and digit phase indicator is compared.The difference of two values is corresponding to the phase rotating being caused by potential pulse
.At this, the value of the amplification factor of the member of the equivalent electrical circuit of acoustic transducer and the measuring amplifier using is on measuring not impact.
Frequency or phase detection unit 122,124 preferably also comprise for identifying the detector of same signal change procedure, for example, hand over zero detector, to detect two phase position and Cycle Lengths of handing between zero.Detecting unit 122,124 can be used a common friendship zero detector.
Oscillation Amplitude, the phase position detecting by the connection transmission to signal generator 110 and the vibration frequency detecting, described signal generator provides damping pulse according to Oscillation Amplitude, frequency and phase position, the motor behavior of described damping pulse resistance converter 100.According to device of the present invention, can also comprise controller 130, its control signal generator 110, to produce driving pulse, damping pulse and ranging pulse by signal generator 110 in the corresponding moment.In the alternative embodiment of the embodiment of presentation graphs 6, pick-up unit 120 not (only) is connected with signal generator 110 but is connected with controller 130, described controller processing amplitude information, frequency information and phase information and correspondingly control signal generator 110.
Fig. 7 illustrates according to the method for the damping for described acoustic transducer of the present invention as flow process Figure 200.In step 210, by providing driving pulse to encourage described converter to vibrate.In detecting step 220, by moment t
1potential pulse cause the phase rotating of converter vibration.Measure phase rotating, and calculate thus current Oscillation Amplitude.According to current Oscillation Amplitude, produce antihunt signal, described antihunt signal is revolted at least in part the vibration operation of converter and in step 230, is provided for converter.Because produce antihunt signal according to the current Oscillation Amplitude of converter, thus can make the duration of antihunt signal and/or the vibration that amplitude is matched with converter, thus produce quick and damping completely.
Alternatively, can after implementation section active damping, carry out the measurement of the amplitude of (going back) existence in advance subsequently, to determine quality and the present parameter of last active damping subsequently of the active damping having carried out.Such measurement for example can be carried out as follows: the excitation of vibration (corresponding to step 210), according to the part active damping of described method and amplitude measurement (220) and last active damping (230).
Claims (12)
1. for a method for the active damping of acoustic transducer, described method has following steps:
By providing driving pulse to encourage described converter to described converter;
By providing antihunt signal to carry out converter described in damping, described antihunt signal is anti-at least in part
The oscillating movement of anti-described converter,
It is characterized in that,
Be provided with detecting step, by means of the vibration of described acoustic transducer in described detecting step
Phase rotating
determine the current Oscillation Amplitude (a of described acoustic transducer
1, a
2, a
2n+1)
And according to described current Oscillation Amplitude (a
1, a
2, a
2n+1) produce described antihunt signal.
2. method according to claim 1, is characterized in that, by the current Oscillation Amplitude (a of described acoustic transducer
1, a
2, a
2n+1) duration of calculating described antihunt signal.
3. method according to claim 1 and 2, is characterized in that, by the current Oscillation Amplitude (a of described acoustic transducer
1, a
2, a
2n+1) calculate the amplitude of described antihunt signal.
4. according to the method in any one of claims 1 to 3, it is characterized in that, not corresponding to the moment t of the friendship of described Oscillation Amplitude zero
1by potential pulse (40,50), cause described phase rotating
, described potential pulse is applied in described acoustic transducer.
5. method according to claim 4, is characterized in that, described potential pulse (40,50) forms by a single edge or by one or more rectangle half-waves (52,54).
6. according to the method described in any one in claim 1 to 5, it is characterized in that, described method comprises additional detecting step, detects the current vibration frequency of described converter in described additional detecting step.
7. according to the method described in claim 5 and 6, it is characterized in that, apply the potential pulse (50) frequency, that formed by half-wave (52,54) having corresponding to the current vibration frequency detecting of described converter.
8. according to the method described in claim 6 or 7, it is characterized in that, apply the antihunt signal having corresponding to the frequency of the current vibration frequency detecting of described converter.
9. for a device for the active damping of acoustic transducer (100), described device comprises:
Pick-up unit (120), it can be connected and be provided for to detect by means of the phase rotating of the vibration of described converter (100) the current Oscillation Amplitude of described acoustic transducer (100) with acoustic transducer (100);
Signal generator (110), it can be connected with described converter (100) and be connected with described pick-up unit (120), wherein, described signal generator (110) is provided for applying antihunt signal on described converter (100), and described antihunt signal is revolted the oscillating movement of described converter at least in part;
Wherein, described antihunt signal depends on detected Oscillation Amplitude.
10. device according to claim 9, wherein, described pick-up unit (120) is additionally provided for detecting the current vibration frequency of the measuring-signal that comes from described converter (100), and the antihunt signal with detected vibration frequency is produced.
11. according to the device described in claim 9 or 10, wherein, described device comprises controller (130), and described controller is provided for receiving amplitude information and/or frequency information and/or phase information and controlling described signal generator (110) according at least one these information from described pick-up unit (120).
12. 1 kinds of sensors, especially for the sonac of the acoustic scan of surrounding environment, it comprises:
Acoustic transducer;
Be used for according to the device of the active damping of the acoustic transducer described in claim 9 to 11 any one.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011076686.3 | 2011-05-30 | ||
| DE102011076686A DE102011076686A1 (en) | 2011-05-30 | 2011-05-30 | Method and device for active damping of an acoustic transducer |
| PCT/EP2012/057362 WO2012163598A1 (en) | 2011-05-30 | 2012-04-23 | Method and appparatus for actively damping an acoustic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103635956A true CN103635956A (en) | 2014-03-12 |
| CN103635956B CN103635956B (en) | 2016-03-16 |
Family
ID=45998373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280026994.3A Active CN103635956B (en) | 2011-05-30 | 2012-04-23 | For the method and apparatus of the active damping of acoustic transducer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2715714B1 (en) |
| CN (1) | CN103635956B (en) |
| DE (1) | DE102011076686A1 (en) |
| WO (1) | WO2012163598A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110612457A (en) * | 2017-05-08 | 2019-12-24 | 罗伯特·博世有限公司 | Operating method and control unit for an ultrasound transceiver, ultrasound transceiver and operating device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3208634B1 (en) | 2016-02-17 | 2018-08-15 | ELMOS Semiconductor Aktiengesellschaft | Ultrasound measuring system, in particular for distance measurement and/or as parking aid in vehicles |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2813729B1 (en) * | 1978-03-30 | 1978-12-14 | Siemens Ag | Method and circuit arrangement for the excitation of ultrasonic transducers which are used in pulse-echo technology |
| DE10136628A1 (en) * | 2001-07-26 | 2003-02-20 | Valeo Schalter & Sensoren Gmbh | Method for operation of an ultrasonic transducer for transmission and receipt of ultrasound waves whereby damping of initial membrane vibration is improved so reducing interference and increasing measurement accuracy |
| CN101064968A (en) * | 2006-04-24 | 2007-10-31 | 伯斯有限公司 | Active noise reduction microphone placing |
| CN101800487A (en) * | 2009-02-09 | 2010-08-11 | 罗伯特·博世有限公司 | The resistance Buddhist nun of mechanical oscillation member |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19605502C1 (en) * | 1996-02-14 | 1997-04-24 | Fraunhofer Ges Forschung | Ultrasonic transducer for distance measurement |
| DE102010039017B4 (en) | 2010-08-06 | 2017-09-21 | Robert Bosch Gmbh | Method and device for active damping of an acoustic transducer |
| DE102010062930A1 (en) | 2010-12-13 | 2012-06-14 | Robert Bosch Gmbh | Method for detecting an object in an environment and device for generating an ultrasound signal |
-
2011
- 2011-05-30 DE DE102011076686A patent/DE102011076686A1/en not_active Withdrawn
-
2012
- 2012-04-23 CN CN201280026994.3A patent/CN103635956B/en active Active
- 2012-04-23 EP EP12716016.6A patent/EP2715714B1/en active Active
- 2012-04-23 WO PCT/EP2012/057362 patent/WO2012163598A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2813729B1 (en) * | 1978-03-30 | 1978-12-14 | Siemens Ag | Method and circuit arrangement for the excitation of ultrasonic transducers which are used in pulse-echo technology |
| DE10136628A1 (en) * | 2001-07-26 | 2003-02-20 | Valeo Schalter & Sensoren Gmbh | Method for operation of an ultrasonic transducer for transmission and receipt of ultrasound waves whereby damping of initial membrane vibration is improved so reducing interference and increasing measurement accuracy |
| CN101064968A (en) * | 2006-04-24 | 2007-10-31 | 伯斯有限公司 | Active noise reduction microphone placing |
| CN101800487A (en) * | 2009-02-09 | 2010-08-11 | 罗伯特·博世有限公司 | The resistance Buddhist nun of mechanical oscillation member |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110612457A (en) * | 2017-05-08 | 2019-12-24 | 罗伯特·博世有限公司 | Operating method and control unit for an ultrasound transceiver, ultrasound transceiver and operating device |
| CN110612457B (en) * | 2017-05-08 | 2024-03-12 | 罗伯特·博世有限公司 | Method for operating an ultrasound transceiver and ultrasound transceiver |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012163598A1 (en) | 2012-12-06 |
| DE102011076686A1 (en) | 2012-12-06 |
| CN103635956B (en) | 2016-03-16 |
| EP2715714A1 (en) | 2014-04-09 |
| EP2715714B1 (en) | 2015-12-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3810430B2 (en) | Ultrasonic ranging device | |
| CN103674181A (en) | Dynamic liquid level ultrasonic detection device and method | |
| US11706990B2 (en) | Method for calibrating at least one sensor | |
| CN103998905A (en) | System and method for measuring the frequency of a vibrating object | |
| JP3680678B2 (en) | Vibration measuring method and frequency measuring device | |
| JPH10253339A (en) | Method and apparatus for measurement by utilizing sound wave | |
| JP6111423B2 (en) | Flow measuring device | |
| CN103997706B (en) | Method and system for acquiring natural frequency of vibration diaphragm | |
| JP7009896B2 (en) | Object detection device | |
| JP2015190817A (en) | ultrasonic sensor | |
| CN104359972A (en) | Method and device for detecting physical property of object | |
| KR101454827B1 (en) | High resolution distance measuring method by phase shifted value of ultrasonic signal | |
| CN103635956B (en) | For the method and apparatus of the active damping of acoustic transducer | |
| WO2019216178A1 (en) | Object sensing device | |
| US9140619B2 (en) | Piezoelectric vacuum gauge and measuring method thereof | |
| JP2005037390A (en) | Determination method and device of natural frequency of bearing system equipped with bearing support shaft | |
| US20090295638A1 (en) | Use of a measurement signal evaluation means of a position measuring device to determine the time difference between a first event and a second event | |
| CN113671215B (en) | Measurement and calibration method and system for improving accuracy of ultrasonic wind sensor | |
| KR20190074027A (en) | System and method for measuring frequency response of the system | |
| US20220074773A1 (en) | Method for Operating an Ultrasonic Flowmeter and Ultrasonic Flowmeter | |
| CN111198282B (en) | Method and system for calibrating an integrated volumetric acceleration sensor of a loudspeaker | |
| JP2018021810A (en) | Ultrasonic displacement measuring device and ultrasonic displacement measuring method | |
| CN106124204B (en) | A kind of system and method for laser vibration measurer investigation belt defect | |
| JPH09292287A (en) | Method for measuring temperature of piston of internal combusion engine, and device therefor | |
| CN109579973A (en) | A kind of vibrating speed sensors sensitivity coefficient method of calibration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |