CN114002661A - Ultrasonic aftershock reduction device and method and ultrasonic detection equipment - Google Patents
Ultrasonic aftershock reduction device and method and ultrasonic detection equipment Download PDFInfo
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- CN114002661A CN114002661A CN202111287169.6A CN202111287169A CN114002661A CN 114002661 A CN114002661 A CN 114002661A CN 202111287169 A CN202111287169 A CN 202111287169A CN 114002661 A CN114002661 A CN 114002661A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
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Abstract
The invention provides an ultrasonic aftershock reduction device, an ultrasonic aftershock reduction method and ultrasonic detection equipment, and relates to the technical field of ultrasonic detection.A controller controls a current generation module to generate a current signal matched with an oscillation parameter based on the oscillation parameter of an oscillation signal of an ultrasonic probe acquired in advance; the direction of the current signal generated by the current output module is opposite to that of the current signal causing the ultrasonic probe to oscillate; then the current sensing module generates an induced current signal based on a preset current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel an oscillation signal of the ultrasonic probe. This mode has reduced the aftershock that ultrasonic transducer produced to improve the accuracy of carrying out the range finding based on ultrasonic transducer.
Description
Technical Field
The invention relates to the technical field of ultrasonic waves, in particular to an ultrasonic aftershock reduction device and method and ultrasonic detection equipment.
Background
Among the prior art, parking position's distance measurement usually measures through ultrasonic transducer, can produce the aftershock among the ultrasonic ranging process, and the aftershock time is longer can lead to the scope of the minimum measuring distance of ultrasonic wave great, and is lower to parking position's distance measurement accuracy.
Disclosure of Invention
In view of the above, the present invention provides an ultrasonic aftershock reduction device, an ultrasonic aftershock reduction method, and an ultrasonic detection apparatus, so as to reduce aftershocks generated by an ultrasonic probe, thereby improving accuracy of distance measurement performed based on the ultrasonic probe.
In a first aspect, an embodiment of the present invention provides an ultrasonic aftershock reduction device, where the device includes a controller, a current generation module, a current induction module, and an ultrasonic probe, which are connected in sequence; the controller is also connected with the ultrasonic probe; the controller is used for controlling the current generation module to generate a current signal matched with the oscillation parameter based on the oscillation parameter of the oscillation signal of the ultrasonic probe acquired in advance; the direction of the current signal generated by the current output module is opposite to that of the current signal causing the ultrasonic probe to oscillate; the current sensing module is used for generating an induced current signal based on a preset current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel the oscillation signal of the ultrasonic probe.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the current generation module includes a first switch, a second switch, and a power supply; the current induction module comprises a first main induction coil, a second main induction coil and an auxiliary induction coil; the power supply, the first switch and the first main induction coil form a first loop; the power supply, the second switch and the second main induction coil form a second loop; the controller is respectively connected with the first switch and the second switch; the oscillation parameter comprises an oscillation frequency; the controller is used for controlling the first switch and the second switch to be alternately switched on and switched off according to the oscillation frequency so as to control the first loop and the second loop to be alternately switched on and switched off and generate a current signal corresponding to the oscillation frequency.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the oscillation parameter further includes an oscillation trend; the controller is also used for controlling the power supply to generate a current signal with the size matched with the oscillation trend.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the current sensing module further includes a secondary induction coil; the auxiliary induction coil is used for generating an induced current signal based on the current signals generated by the first loop and the second loop; the induced current signal matches the oscillation frequency.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the apparatus further includes a aftershock reduction module; the aftershock reducing module is respectively connected with the controller and the ultrasonic probe; the controller is also used for controlling the current generation module to stop generating the current signal and controlling the aftershock reduction module to release the residual oscillation signal of the ultrasonic probe after the current generation module starts to generate the current signal for the set time.
With reference to the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the aftershock reduction module includes a variable resistor and a third switch; the variable resistor is connected with the ultrasonic probe; the controller is also used for controlling the third switch to be closed and controlling the resistance value of the variable resistor to be changed from small to large so as to release the residual oscillation signal of the ultrasonic probe.
With reference to the fifth possible implementation manner of the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the variable resistor is grounded through the third switch.
In a second aspect, an embodiment of the present invention further provides an ultrasonic aftershock reduction method, including: the controller controls the current generation module to generate a current signal matched with the oscillation parameter based on the oscillation parameter of the oscillation signal of the ultrasonic probe acquired in advance; the direction of the current signal generated by the current output module is opposite to that of the current signal causing the ultrasonic probe to oscillate; the current sensing module generates an induced current signal based on a preset current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel the oscillation signal of the ultrasonic probe.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the current generating module includes a first switch, a second switch, and a power supply; the current induction module comprises a first main induction coil, a second main induction coil and an auxiliary induction coil; the power supply, the first switch and the first main induction coil form a first loop; the power supply, the second switch and the second main induction coil form a second loop; the controller is respectively connected with the first switch and the second switch; the oscillation parameter comprises an oscillation frequency; the method comprises the following steps of controlling a current generation module to generate a current signal matched with oscillation parameters based on the oscillation parameters of oscillation signals of the ultrasonic probe acquired in advance, wherein the steps comprise: and controlling the first switch and the second switch to be alternately switched on and off according to the oscillation frequency so as to control the first loop and the second loop to be alternately switched on and off and generate a current signal corresponding to the oscillation frequency.
In a third aspect, an embodiment of the present invention further provides an ultrasonic detection apparatus, including an ultrasonic generation device and the ultrasonic aftershock reduction device as above.
The embodiment of the invention has the following beneficial effects:
the invention provides an ultrasonic aftershock reduction device, an ultrasonic aftershock reduction method and ultrasonic detection equipment, and relates to the technical field of ultrasonic detection.A controller controls a current generation module to generate a current signal matched with an oscillation parameter based on the oscillation parameter of an oscillation signal of an ultrasonic probe acquired in advance; the direction of the current signal generated by the current output module is opposite to that of the current signal causing the ultrasonic probe to oscillate; then the current sensing module generates an induced current signal based on a preset current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel an oscillation signal of the ultrasonic probe. This mode has reduced the aftershock that ultrasonic transducer produced to improve the accuracy of carrying out the range finding based on ultrasonic transducer.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an ultrasonic aftershock reduction device according to an embodiment of the present invention;
fig. 2 is a circuit diagram of an ultrasonic aftershock reduction device according to an embodiment of the present invention;
fig. 3 is a circuit diagram of an ultrasonic wave generating apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an acoustic wave emitted from an ultrasonic probe according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an ultrasonic aftershock reduction method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an ultrasonic detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Along with the development in city, the urban space is littleer and littleer, and no matter be automatic parking or artifical parking all need have very accurate measurement to the distance, and the system that also is the most effective distance of measuring at present is measured with ultrasonic transducer, and the minimum distance bottleneck of measuring of ultrasonic transducer head depends on the length of aftershock time. The invention provides a technology for reducing aftershock. Reverse energization and discharge are utilized to solve this problem. The time of aftershock is reduced, the blind area of the ultrasonic wave is reduced, and the minimum distance of ultrasonic wave distance measurement is increased.
Based on the above, the embodiment of the invention provides an ultrasonic aftershock reduction device, an ultrasonic aftershock reduction method and an ultrasonic detection device, which can be applied to the distance measurement process of various vehicles in the parking process.
For the convenience of understanding the present embodiment, a detailed description will be given to an ultrasonic aftershock reduction device disclosed in the present embodiment.
The embodiment of the invention provides an ultrasonic aftershock reduction device. As shown in fig. 1, the ultrasonic aftershock reduction device includes a controller 100, a current generation module 102, a current sensing module 104 and an ultrasonic probe 106, which are connected in sequence; the controller 100 is also connected 106 to the ultrasound probe.
In the working process of the device, the controller is used for controlling the current generation module to generate a current signal matched with the oscillation parameter based on the oscillation parameter of the oscillation signal of the ultrasonic probe acquired in advance; the current output module generates a current signal in a direction opposite to that of the current signal causing the ultrasonic probe to oscillate, the current signal being matched to the oscillation parameter.
For example, when the ultrasonic wave needs to be transmitted at a frequency of 50khz, the ultrasonic wave generating device provides the ultrasonic probe with a signal having a frequency of 50khz generated by the constant current source, the oscillation parameter of the ultrasonic probe is 50khz, and the direction of the constant current generated by the ultrasonic wave generating device can be set to be the forward current direction. The constant current source of the current generating module may be regarded as a current drain with respect to the ultrasonic wave generating device, and a direction of a current signal generated by the current generating module is opposite to a direction of a current signal generated by the constant current source of the ultrasonic wave generating device.
The current sensing module is used for generating an induced current signal based on the current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel the oscillation signal of the ultrasonic probe.
The current sensing module acts the current signal generated by the current generating module on the ultrasonic probe, so that the ultrasonic probe generates an oscillation signal based on the current signal to counteract the oscillation signal generated by the ultrasonic probe acquired in advance.
Specifically, the current generation module may be composed of a first switch, a second switch, and a power supply; the current induction module consists of a first main induction coil, a second main induction coil and an auxiliary induction coil; the power supply, the first switch and the first main induction coil form a first loop; the power supply, the second switch and the second main induction coil form a second loop; the controller is respectively connected with the first switch and the second switch; wherein the oscillation parameter may include an oscillation frequency; in a specific implementation, the controller controls the first switch and the second switch to be alternately switched on and off according to the oscillation frequency, so that the first loop and the second loop are alternately switched on and off, and a current signal corresponding to the oscillation frequency is generated.
Wherein, the oscillation parameter can also comprise an oscillation trend; the controller is also used for controlling the power supply to generate a current signal with the magnitude matched with the oscillation trend. The current sensing module may further include a secondary induction coil; the auxiliary induction coil generates an induced current signal based on the current signals generated by the first loop and the second loop; the induced current signal matches the oscillation frequency.
The ultrasonic aftershock reduction device can also comprise an aftershock reduction module, wherein the aftershock reduction module is respectively connected with the controller and the ultrasonic probe; and in a period of time when the current generation module starts to generate the current signal, the controller controls the current generation module to stop generating the current signal, so that the aftershock reduction module releases the residual oscillation signal of the ultrasonic probe.
The aftershock mitigation module may include a variable resistor and a third switch; wherein, the variable resistor is connected with the ultrasonic probe; the controller is also used for controlling the third switch to be closed and controlling the resistance value of the variable resistor to be changed from small to large so as to release the residual oscillation signal of the ultrasonic probe. Wherein the variable resistor is connected to ground through the third switch.
The invention provides an ultrasonic aftershock reduction device, which relates to the technical field of ultrasonic detection.A controller controls a current generation module to generate a current signal matched with an oscillation parameter based on the oscillation parameter of a parameter oscillation signal of an ultrasonic probe acquired in advance; the direction of the current signal generated by the current output module is opposite to that of the current signal causing the ultrasonic probe to oscillate; then the current sensing module generates an induced current signal based on a preset current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to offset the oscillation signal of the ultrasonic probe, and the mode reduces the aftershock generated by the ultrasonic probe, so that the accuracy of distance measurement based on the ultrasonic probe is improved.
The embodiment of the invention also provides another ultrasonic aftershock reduction device which is realized on the basis of the device shown in fig. 1, and the structural schematic diagram of the device is shown in fig. 2.
The current generating module comprises a first switch L1, a second switch L2, a current drain 202 and a power supply 204; the current induction module comprises a main induction coil 206 and an auxiliary induction coil 208; the damping aftershock module comprises a variable resistor R1 and a third switch L3; the first switch and the second switch are respectively connected with two sides of a main induction coil of the current induction module, the main induction coil is also connected with the first switch and the second switch through a current leakage grounding power supply, an auxiliary winding of the transformer is connected with the ultrasonic probe, one end of the transformer is grounded, the other end of the transformer is connected with the variable resistor, and the variable resistor is grounded through a third switch.
The ultrasonic aftershock reduction device can be obtained by performing circuit conversion on the basis of the ultrasonic generation device shown in fig. 3.
When the ultrasonic wave generating device needs to transmit 50khz ultrasonic waves in the working process, under the condition that the current source 300 provides constant current, the first switch L1 and the second switch L2 are alternately opened, namely the first switch is opened, the second switch is closed, otherwise, the second switch is opened, the first switch is closed, the switching frequency is 50khz, therefore, a 50khz sine wave is generated on the secondary induction circuit 306 of the current induction module, namely the ultrasonic probe 106, the constant current power supply 3 is turned off when the transmission is stopped, the first switch and the second switch are simultaneously turned off, and the ultrasonic probe slowly changes energy from high to low by means of the self aftershock. Referring specifically to the ultrasonic device transmit waveform shown in fig. 4, part 2, 400, the transmit acoustic wave amplitude slowly decreases until it stops after the cross current source and switch are turned off, see 402, in the normal transmit mode.
When the ultrasonic aftershock reduction device is used for carrying out aftershock reduction treatment on the ultrasonic probe, the current source needs to be changed into a current drain at first, namely, the current direction generated by the current source is changed into the opposite direction; then the first switch and the second switch are alternately opened, namely the first switch is opened, the second switch is closed, otherwise the second switch is opened, the first switch is closed, the switching frequency is 50khz, so that a 50khz sine wave with completely reverse phase and sending direction is generated on a secondary winding of the current induction module transformer, namely the ultrasonic probe, the current leakage is continuously reduced by the controller, the energy of the sine wave generated by the secondary winding is equivalent to the aftershock energy of the ultrasonic head, and the phase is reversed. After a certain time, the current drain, the first switch and the second switch are turned off, the third switch is closed, the variable resistance is changed from small to large, and the energy of the aftershock of the ultrasonic head is released rapidly.
This mode can release the aftershock that ultrasonic transducer produced fast, and then has improved the accuracy based on ultrasonic transducer carries out the range finding.
Corresponding to the above-mentioned embodiment of the ultrasonic aftershock reduction device, an embodiment of the present invention provides an ultrasonic aftershock reduction method, which is applied to all the above-mentioned ultrasonic aftershock reduction devices, as shown in fig. 5, and the method includes:
step S500, the controller controls the current generation module to generate a current signal matched with the oscillation parameter based on the oscillation parameter of the oscillation signal of the ultrasonic probe acquired in advance; the current output module generates a current signal in a direction opposite to that of the current signal causing the ultrasonic probe to oscillate.
Specifically, the current generation module comprises a first switch, a second switch and a power supply; the current induction module comprises a first main induction coil, a second main induction coil and an auxiliary induction coil; the power supply, the first switch and the first main induction coil form a first loop; the power supply, the second switch and the second main induction coil form a second loop; the controller is respectively connected with the first switch and the second switch; the oscillation parameter comprises an oscillation frequency; the step S500 may be implemented as follows: and controlling the first switch and the second switch to be alternately switched on and off according to the oscillation frequency so as to control the first loop and the second loop to be alternately switched on and off and generate a current signal corresponding to the oscillation frequency.
Step S502, the current sensing module generates an induced current signal based on the current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel the oscillation signal of the ultrasonic probe.
The ultrasonic aftershock reduction method provided by the embodiment of the invention has the same technical characteristics as the ultrasonic aftershock reduction device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Corresponding to the above-mentioned embodiment of the ultrasonic aftershock reduction device, an embodiment of the present invention provides an ultrasonic detection apparatus, as shown in fig. 6, which includes an ultrasonic wave generation device 600 and the above-mentioned ultrasonic aftershock reduction device 602.
The ultrasonic detection device provided by the embodiment of the invention has the same technical characteristics as the ultrasonic aftershock reduction device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The ultrasonic aftershock reduction method and the ultrasonic detection device provided by the embodiment of the invention have the same technical characteristics as the ultrasonic aftershock reduction device provided by the embodiment, so that the same technical problems can be solved, and the same technical effect can be achieved.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An ultrasonic aftershock reduction device is characterized by comprising a controller, a current generation module, a current induction module and an ultrasonic probe which are sequentially connected; the controller is also connected with the ultrasonic probe;
the controller is used for controlling the current generation module to generate a current signal matched with the oscillation parameter based on the oscillation parameter of the oscillation signal of the ultrasonic probe acquired in advance; the direction of the current signal generated by the current output module is opposite to that of the current signal causing the ultrasonic probe to oscillate;
the current sensing module is used for generating an induced current signal based on the current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel an oscillation signal of the ultrasonic probe.
2. The ultrasonic aftershock reduction device according to claim 1, wherein the current generation module comprises a first switch, a second switch and a power supply; the current induction module comprises a first main induction coil, a second main induction coil and an auxiliary induction coil; the power supply, the first switch and the first main induction coil form a first loop; the power supply, the second switch and the second main induction coil form a second loop; the controller is respectively connected with the first switch and the second switch; the oscillation parameter comprises an oscillation frequency;
the controller is used for controlling the first switch and the second switch to be alternately switched on and off according to the oscillation frequency so as to control the first loop and the second loop to be alternately switched on and off and generate a current signal corresponding to the oscillation frequency.
3. The apparatus of claim 2, wherein the oscillation parameters further comprise an oscillation trend; the controller is also used for controlling the power supply to generate a current signal with the size matched with the oscillation trend.
4. The apparatus of claim 2, wherein the current sensing module further comprises a secondary inductive coil; the secondary induction coil is used for generating an induced current signal based on the current signals generated by the first loop and the second loop; the induced current signal is matched to the oscillation frequency.
5. The apparatus of claim 1, further comprising a aftershock mitigation module; the aftershock reducing module is respectively connected with the controller and the ultrasonic probe;
the controller is further configured to control the current generation module to stop generating the current signal and control the aftershock reduction module to release the remaining oscillation signal of the ultrasonic probe after a set time for the current generation module to start generating the current signal.
6. The apparatus of claim 5, wherein the aftershock mitigation module comprises a variable resistor and a third switch; the variable resistor is connected with the ultrasonic probe; the controller is also used for controlling the third switch to be closed and controlling the resistance value of the variable resistor to be changed from small to large so as to release the residual oscillation signal of the ultrasonic probe.
7. The apparatus of claim 6, wherein the variable resistor is grounded through the third switch.
8. An ultrasonic aftershock reduction method applied to the ultrasonic aftershock reduction device according to any one of claims 1 to 7, the method comprising:
the controller controls the current generation module to generate a current signal matched with the oscillation parameter based on the oscillation parameter of the oscillation signal of the ultrasonic probe acquired in advance; the direction of the current signal generated by the current output module is opposite to that of the current signal causing the ultrasonic probe to oscillate;
the current sensing module generates an induced current signal based on the current signal generated by the current generating module; the induced current signal acts on the ultrasonic probe to cancel an oscillation signal of the ultrasonic probe.
9. The ultrasonic aftershock reduction method according to claim 8, wherein the current generation module includes a first switch, a second switch, and a power supply; the current induction module comprises a first main induction coil, a second main induction coil and an auxiliary induction coil; the power supply, the first switch and the first main induction coil form a first loop; the power supply, the second switch and the second main induction coil form a second loop; the controller is respectively connected with the first switch and the second switch; the oscillation parameter comprises an oscillation frequency;
the step of controlling the current generation module to generate a current signal matched with the oscillation parameter based on the oscillation parameter of the oscillation signal of the ultrasonic probe acquired in advance comprises the following steps:
and controlling the first switch and the second switch to be alternately switched on and off according to the oscillation frequency so as to control the first loop and the second loop to be alternately switched on and off and generate a current signal corresponding to the oscillation frequency.
10. An ultrasonic detection apparatus comprising an ultrasonic wave generating device and an ultrasonic aftershock reducing device according to any one of claims 1 to 7.
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