阅读说明：本技术 空鼓检测方法、系统及设备 (Hollowing detection method, system and equipment ) 是由 柳苏益 于 2021-09-15 设计创作，主要内容包括：本申请涉及一种空鼓检测方法、装置及空鼓探头,属于空鼓检测技术领域,其中,方法包括：响应用户触发的启动调整指令,进入调试模式,输出共鸣腔调节命令,以使共鸣腔调节组件将空鼓检测装置的共鸣腔体积调节为与待测目标检测面相匹配的检测共鸣腔体积；响应用户触发的检测指令,进入检测模式,获取与当前待测目标检测面相匹配的检测共鸣腔体积,并在所述检测共鸣腔体积下,进行空鼓检测。本申请可以实现根据实际工况,自动调整相匹配的工作状态,提升检测的准确率,解决现有人工调整方式,导致检测结果不准确的问题。(The application relates to an empty drum detection method, an empty drum detection device and an empty drum probe, and belongs to the technical field of empty drum detection, wherein the method comprises the following steps: responding to a starting adjustment instruction triggered by a user, entering a debugging mode, and outputting a resonance cavity adjusting command to enable a resonance cavity adjusting component to adjust the volume of a resonance cavity of the hollowing detection device to a detection resonance cavity volume matched with a detection surface of a target to be detected; responding to a detection instruction triggered by a user, entering a detection mode, acquiring the volume of a detection resonance cavity matched with the detection surface of the current target to be detected, and carrying out hollowing detection under the volume of the detection resonance cavity. This application can realize according to operating condition, automatically regulated assorted operating condition promotes the rate of accuracy that detects, solves current artifical adjustment mode, leads to the unsafe problem of testing result.)

1. A method of empty drum detection, the method comprising:

responding to a starting adjustment instruction triggered by a user, and executing a resonance cavity debugging step, wherein the resonance cavity debugging step comprises the following steps: outputting a resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity to a detection resonance cavity volume state matched with a target detection surface to be detected;

responding to the end of the resonance cavity debugging step, executing a detection step, wherein the detection step comprises the following steps: acquiring the volume information of the detection resonance cavity matched with the detection surface of the current target to be detected, and carrying out empty drum detection when the resonance cavity is in a state of detecting the volume of the resonance cavity.

2. The method of claim 1, wherein the adjusting the resonance chamber to a detection resonance chamber volume state matched with the detection surface of the object to be detected comprises:

respectively acquiring sound signals generated when the hollow hammer strikes a target detection surface for the resonance cavities with different volumes obtained by adjusting the resonance cavity adjusting assembly;

and determining the volume of the detection resonance cavity matched with the target detection surface by comparing the resonance frequencies of the sound signals corresponding to different volumes of the resonance cavity.

3. The method as claimed in claim 2, wherein the step of obtaining the sound signals generated when the hollow hammer strikes the target detection surface respectively for the resonance chambers with different volumes obtained by adjusting the resonance chamber adjusting assembly comprises:

responding to the resonance cavity adjusting assembly to complete the adjustment of the volume of the current resonance cavity, and outputting an empty-drum hammer control signal, wherein the empty-drum hammer control signal is used for controlling the empty-drum hammer to knock a target detection surface according to preset knocking times;

acquiring a sound signal generated when the empty drum hammer strikes a target detection surface each time;

and if the volume of the current resonance cavity is not adjusted to the target volume, skipping to the step of executing the output resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity, and ending the execution until the volume of the current resonance cavity is adjusted to the target volume.

4. The method of claim 2, wherein determining a detected resonance chamber volume matching the target detection surface by comparing resonance frequencies of the acoustic signal corresponding to resonance chambers of different volumes comprises:

respectively recording the highest resonance frequency in all the obtained sound signals for resonance cavities with different volumes;

and determining the maximum value in the highest resonance frequency, and determining the volume of the resonance cavity corresponding to the maximum value as the volume of the detection resonance cavity matched with the target detection surface.

5. The method of claim 2, wherein after comparing resonance frequencies of the acoustic signals corresponding to resonance chambers of different volumes and determining a volume of a resonance chamber matching the target detection surface, further comprising the step of adjusting a frequency amplification factor:

sequentially outputting output voltage values corresponding to different amplification factors according to a preset voltage output mode, wherein the output voltage values are within a preset adjustable voltage range;

under different output voltage values, sound signals generated by knocking a target detection surface by a hollow hammer for preset times are respectively obtained, and the resonance frequency variance of the sound signals is calculated;

and determining the minimum value in all frequency variances, and determining the output voltage corresponding to the minimum value as the optimal output voltage.

6. The method as claimed in claim 2, wherein, before the step of obtaining the sound signal generated by knocking the target detection surface by the hollow hammer, the projection range of the resonance cavity on the target detection surface is adjusted to be smaller than the range of the target detection surface to be detected.

7. The method of claim 1, wherein outputting a resonance chamber adjustment command to cause a resonance chamber adjustment assembly to adjust a volume of a resonance chamber comprises:

identifying the plane range of the detection surface of the target to be detected;

and outputting a resonance cavity adjusting command based on the plane range of the target detection surface to be detected so that the resonance cavity adjusting component adjusts the volume of the resonance cavity within the volume adjustable range of the resonance cavity, and the condition that the projection range of the resonance cavity on the target detection surface is adjusted to be smaller than the plane range of the target detection surface to be detected is met.

8. The method of claim 1, wherein the detecting step further comprises:

acquiring resonance frequency generated when the hollow drummer strikes a target detection surface when the resonance cavity is in a state of detecting the volume of the resonance cavity;

and comparing the resonance frequency with a preset standard frequency corresponding to a target detection surface to be detected, and determining a hollowing detection result.

9. A hollowing detection system, comprising:

the debugging module is used for responding to a starting adjustment instruction triggered by a user and executing a resonance cavity debugging step, and the resonance cavity debugging step comprises the following steps: outputting a resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity to a detection resonance cavity volume state matched with a target detection surface to be detected;

a detection module, configured to execute a detection step in response to the end of the resonance cavity debugging step, where the detection step includes: acquiring the volume information of the detection resonance cavity matched with the detection surface of the current target to be detected, and carrying out empty drum detection when the resonance cavity is in a state of detecting the volume of the resonance cavity.

10. An electronic device comprising a processor and a memory, said memory having stored thereon a program which, when executed by the processor, is adapted to carry out the steps of the method of any of claims 1-8.

Technical Field

The application relates to the technical field of hollowing detection, in particular to a hollowing detection method, system and equipment.

Background

Along with the development of economy, people also improved the inside and outside decoration level of building, and the building wall is pasted the veneer ceramic tile outward and is seemed clean and tidy pleasing to the eye, and the indoor ground is pasted the ceramic tile not only neatly pleasing to the eye, cleans the health easily moreover, but the ceramic tile will produce not hard up through short-term use because the bonding is insecure with wall, floor, not only influences the use, and because the bonding is insecure to the decoration ceramic tile on the wall, the ceramic tile drops and still can take place to pound the incident of hindering personnel.

At present, when the adhesion quality of the face brick is checked, the traditional inspection method is to manually tap the floor or wall tile by using an empty drum hammer, judge whether empty drum or local empty drum occurs according to sound, and ensure that the appearance is qualified.

However, the traditional manual detection of hollowing of wall and floor tiles wastes time and labor when being knocked manually, and sounds generated by knocking different walls or floor tiles in different spaces are different, so that misjudgment is caused.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

Disclosure of Invention

An object of the application is to provide a hollowing detection method, system and equipment for solve traditional artifical mode that detects the hollowing, rely on the manual work to strike the target detection face, waste time and energy, moreover under the operating mode of difference, the sound that the hollowing hammer struck the target detection face and sent is different, leads to the problem of erroneous judgement easily.

The purpose of the application is realized by the following technical scheme:

in a first aspect, a method for detecting empty drum is provided, the method comprising:

responding to a starting adjustment instruction triggered by a user, and executing a resonance cavity debugging step, wherein the resonance cavity debugging step comprises the following steps: outputting a resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity to a detection resonance cavity volume state matched with a target detection surface to be detected;

responding to the end of the resonance cavity debugging step, executing a detection step, wherein the detection step comprises the following steps: acquiring the volume information of the detection resonance cavity matched with the detection surface of the current target to be detected, and carrying out empty drum detection when the resonance cavity is in a state of detecting the volume of the resonance cavity.

Optionally, in an embodiment of an aspect, the adjusting the resonance cavity to a detection resonance cavity volume state matched with the detection surface of the object to be detected includes:

respectively acquiring sound signals generated when the hollow hammer strikes a target detection surface for the resonance cavities with different volumes obtained by adjusting the resonance cavity adjusting assembly;

and determining the volume of the detection resonance cavity matched with the target detection surface by comparing the resonance frequencies of the sound signals corresponding to different volumes of the resonance cavity.

Optionally, in an embodiment of an aspect, the obtaining, separately for the resonance chambers of different volumes obtained by adjusting the resonance chamber adjusting assembly, sound signals generated by knocking the target detection surface with the hollowing hammer includes:

responding to the resonance cavity adjusting assembly to complete the adjustment of the volume of the current resonance cavity, and outputting an empty-drum hammer control signal, wherein the empty-drum hammer control signal is used for controlling the empty-drum hammer to knock a target detection surface according to preset knocking times;

acquiring a sound signal generated when the empty drum hammer strikes a target detection surface each time;

and if the volume of the current resonance cavity is not adjusted to the target volume, skipping to the step of executing the output resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity, and ending the execution until the volume of the current resonance cavity is adjusted to the target volume.

Optionally, in an embodiment of an aspect, the determining a volume of a detection resonance cavity matched with the target detection surface by comparing resonance frequencies of the sound signals corresponding to resonance cavities of different volumes includes:

respectively recording the highest resonance frequency in all the obtained sound signals for resonance cavities with different volumes;

and determining the maximum value in the highest resonance frequency, and determining the volume of the resonance cavity corresponding to the maximum value as the volume of the detection resonance cavity matched with the target detection surface.

Optionally, in an embodiment of an aspect, after comparing resonance frequencies of the acoustic signals corresponding to resonance chambers of different volumes and determining a volume of a resonance chamber matching the target detection plane, the method further includes a step of adjusting a frequency amplification factor:

sequentially outputting output voltage values corresponding to different amplification factors according to a preset voltage output mode, wherein the output voltage values are within a preset adjustable voltage range;

under different output voltage values, sound signals generated by knocking a target detection surface by a hollow hammer for preset times are respectively obtained, and the resonance frequency variance of the sound signals is calculated;

and determining the minimum value in all frequency variances, and determining the output voltage corresponding to the minimum value as the optimal output voltage.

Optionally, in an embodiment of an aspect, before the step of acquiring the sound signal generated by knocking the target detection surface by the hollowhammer, the projection range of the resonance cavity on the target detection surface is adjusted to be smaller than the range of the target detection surface to be detected.

Optionally, in an embodiment of an aspect, the outputting a resonance chamber adjustment command to cause the resonance chamber adjustment assembly to adjust the volume of the resonance chamber includes:

identifying the plane range of the detection surface of the target to be detected;

and outputting a resonance cavity adjusting command based on the plane range of the target detection surface to be detected so that the resonance cavity adjusting component adjusts the volume of the resonance cavity within the volume adjustable range of the resonance cavity, and the condition that the projection range of the resonance cavity on the target detection surface is adjusted to be smaller than the plane range of the target detection surface to be detected is met.

Optionally, in an embodiment of an aspect, the detecting step further includes:

acquiring resonance frequency generated when the hollow drummer strikes a target detection surface when the resonance cavity is in a state of detecting the volume of the resonance cavity;

and comparing the resonance frequency with a preset standard frequency corresponding to a target detection surface to be detected, and determining a hollowing detection result.

In a second aspect, there is provided a hollowing detection system comprising:

the debugging module is used for responding to a starting adjustment instruction triggered by a user and executing a resonance cavity debugging step, and the resonance cavity debugging step comprises the following steps: outputting a resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity to a detection resonance cavity volume state matched with a target detection surface to be detected;

a detection module, configured to execute a detection step in response to the end of the resonance cavity debugging step, where the detection step includes: acquiring the volume information of the detection resonance cavity matched with the detection surface of the current target to be detected, and carrying out empty drum detection when the resonance cavity is in a state of detecting the volume of the resonance cavity.

In a third aspect, an electronic device is provided, comprising a processor and a memory, wherein the memory stores a program, and the program, when executed by the processor, is adapted to implement the steps of the method according to the first aspect.

Compared with the prior art, the method has the following beneficial effects: this application is according to the start adjustment instruction that user's a key triggered, the volume in automatically regulated resonance chamber to the resonance chamber of different volumes, acquire the sound signal that the empty drum hammer struck target detection face respectively, and according to the resonance frequency of the sound signal that the resonance chamber of different volumes corresponds, confirm to detect the resonance chamber volume. The resonance cavity volume can be determined and detected aiming at target detection surfaces with different sizes and different materials, so that hollowing detection is carried out, the accuracy rate of hollowing detection is improved, and misjudgment is avoided. Meanwhile, the working state of the hollowing probe is automatically adjusted by one key, so that the adjustment time is greatly shortened, and the working efficiency is improved.

In addition, this application is after adjusting to detect resonance chamber volume, has still further adjusted the magnification of sound signal, ensures the stability of the sound data of gathering, has further improved the accuracy that detects.

Drawings

FIG. 1 is a schematic structural diagram of an empty drum detection device according to an embodiment of the present application;

FIG. 2 is a flow chart of a method of empty drum detection provided by one embodiment of the present application;

figure 3 is a flow chart of resonance chamber debugging steps provided by one embodiment of the present application;

FIG. 4 is a flow chart of acquiring an acoustic signal provided by an embodiment of the present application;

FIG. 5 is a flow chart of the detection steps provided by another embodiment of the present application;

FIG. 6 is a block diagram of a system for detecting empty drum according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an empty drum detection device according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a sound collection unit provided in one embodiment of the present application;

fig. 9 is a schematic diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Traditional manual detection wall ceramic tile hollowing, artifical striking is wasted time and energy, moreover in the space of difference, the sound of striking different wall or ceramic tile and sending all is different to lead to the problem of erroneous judgement, this application provides a hollowing detection method.

The hollowing is caused by the presence of air in the original masonry and the fly ash layer. When the hollowing detection is carried out, the plastering layer and the leveling layer are tapped by an empty drum hammer or a hard object, and if the clattering sound is generated, the hollowing is judged.

The hollowing is caused by the presence of air in the original masonry and the fly ash layer. When the hollowing detection is carried out, the plastering layer and the leveling layer are tapped by an empty drum hammer or a hard object, and if the clattering sound is generated, the hollowing is judged.

Fig. 1 shows a schematic structural diagram of an empty drum detection device provided in an embodiment of the present application, and as shown in fig. 1, the empty drum detection device includes a device body 1 of an integrated structure, where the device body 1 is of a box structure, and the box structure includes a hollow inner cavity, and an empty drum hammer 3 is disposed in the inner cavity.

The box structure is provided with an opening, and when hollowing is detected, the opening of the box structure faces a target detection surface and is attached to the target detection surface, so that a relatively closed cavity is formed between the inner cavity of the box structure and the target detection surface, and the relatively closed cavity is a resonance cavity.

When the hollowing detection is carried out, the opening of the device body 1 faces to the target detection surface, the target detection surface is knocked by controlling the action of the hollow hammer 3, and whether the hollowing, the hollowing degree, the hollowing area and the like exist on the target detection surface is judged according to the resonance frequency of the sound signal generated when the hollow hammer 3 knocks the target detection surface.

The target detection surface of the embodiment refers to a surface to be detected, such as a wall brick or a floor tile.

Further, a movable plate 4 is arranged in the resonance cavity of the present embodiment, and the volume of the resonance cavity can be adjusted by moving the position of the movable plate 4.

The movable plate 4 divides the resonance chamber into a working chamber 61 and a non-working chamber 62, and the hollow hammer 3 is located in the working chamber 61. The volume of the resonance chamber adjusted in this embodiment is the volume of the working chamber 61.

In this embodiment, the size of the movable plate 4 is adapted to the resonance cavity, and the movable plate 4 is attached to the inner side surface of the box structure, so that a relatively closed space is formed between the working cavity 61 and the non-working cavity 62 and the target detection surface when detection is performed.

When the hollowing detection is carried out, the volume of the resonance cavity can be adjusted according to target detection surfaces with different sizes and materials and different detection scenes, so that the volume of the resonance cavity is adaptive to the detection scenes, and the detection accuracy is improved.

In the present embodiment, the moving position of the movable plate 4 is driven by a resonance cavity adjusting assembly, wherein the resonance cavity adjusting assembly includes a motor 21 and a screw rod 22, the screw rod 22 is rotatably installed inside the resonance cavity, and the movable plate 4 is installed on the screw rod.

The rotating shaft of the motor 21 is connected with one end of the screw rod 22 and is used for driving the screw rod 22 to rotate. In the embodiment, the motor 21 drives the screw rod 22 to rotate, so as to drive the movable plate 4 to move, so that the movable plate 4 is located at different positions of the resonance cavity, thereby adjusting the volume of the resonance cavity.

The movable plate 4 of this embodiment is provided with a mounting hole, and the screw rod 22 passes through the mounting hole and is mounted in cooperation with the movable plate 4, so as to realize the movement of the movable plate 4 on the screw rod 22.

Alternatively, the motor 21 of the present embodiment is a stepping motor. The rotation of the stepping motor is operated in one step at a fixed angle, and the angular displacement can be controlled by controlling the number of pulses, so that the aim of accurate positioning is fulfilled.

Optionally, in this embodiment, the lead screw is uniformly divided into a plurality of segments along the length direction, where each segment is a unit length, for example, the segment is divided into 1024 segments, and the corresponding unit length is 1/1024.

Of course, the screw rod can be divided into different numbers of unit lengths according to actual needs, and the specific unit length is not limited in the application.

Before the hollowing detection is carried out by the hollowing detector, the volume of the resonance cavity in the hollowing probe is adjusted, so that the volume of the resonance cavity meets the requirement of a detection environment, and the aim of accurate detection is fulfilled.

The present embodiment is further provided with a main control unit and a sound collection unit 5, wherein the sound collection unit 5 is configured to collect sound signals generated when the hollowing hammer strikes the target detection surface in resonance cavities with different volumes.

The main control unit is used for outputting a resonance cavity adjusting command to the motor 21 according to a starting adjusting instruction triggered by a user, so that the motor 21 drives the movable plate 4 to move, the volume of the resonance cavity is adjusted, sound signals collected by the sound collecting unit 5 in the resonance cavities with different volumes are obtained, and the volume of the resonance cavity matched with the current target detection surface is determined.

This embodiment can trigger through a key formula, realizes the automatic adjustment of hollowing hammer probe operating condition, avoids artifical adjustment operating condition, the problem that wastes time and energy of bringing. Moreover, the empty drum hammer probe of the embodiment can improve the accuracy of empty drum detection by automatically adjusting the matched resonance cavity for different target detection surfaces.

The target detection surface of the embodiment refers to a surface to be detected of a wall brick, a floor tile or the like to be subjected to hollowing detection.

The specific embodiment of the adjustment of the empty drum probe by the main control unit will be described in detail below.

Fig. 2 is a flowchart of an empty drum detection method according to an embodiment of the present application, and the empty drum detection method according to the present application is described below with reference to the main control unit 5 in the empty drum detection device shown in fig. 1 as an execution main body, and as shown in fig. 2, the empty drum detection method includes:

s201, responding to a starting adjustment instruction triggered by a user, executing a resonance cavity debugging step, wherein the resonance cavity debugging step comprises the following steps: and outputting a resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity of the empty drum detection device to be matched with the detection surface of the target to be detected.

Specifically, the operating mode of the hollowing detection device of the embodiment is provided with a debugging mode, and when hollowing detection is performed, if the volume of the resonance cavity needs to be adjusted first, the operating mode of the hollowing detection device is switched to the debugging mode, and the volume of the resonance cavity is adjusted by a user in a one-key triggering mode, so that the volume of the resonance cavity matched with a target detection surface is obtained.

In this embodiment, a user operates a start switch to trigger a start adjustment instruction, where the start switch may be, for example, a button switch or a toggle switch.

After receiving the starting adjustment instruction, the main control unit outputs a resonance cavity adjustment command to the resonance cavity adjustment assembly, so that the resonance cavity adjustment assembly adjusts the volume of the resonance cavity.

S202, responding to the end of the resonance cavity debugging step, executing a detection step, wherein the detection step comprises the following steps: and acquiring the volume of a detection resonance cavity matched with the detection surface of the current target to be detected, and carrying out hollowing detection under the volume of the detection resonance cavity.

Specifically, the hollowing detection apparatus of the present embodiment is provided with a detection mode, and when the resonance cavity debugging step is completed, the detection mode is directly entered, and the detection step is executed to perform hollowing detection. After receiving the debugging completion signal, the control unit identifies the plane range or material information of the detection surface of the current target to be detected, then obtains the volume of the detection resonance cavity matched with the detection surface of the current target to be detected, and starts the hollowing detection under the volume of the detection resonance cavity.

Fig. 3 is a flowchart of a resonance cavity debugging step provided in an embodiment of the present application, and as shown in fig. 3, a specific implementation manner of step S201 in this embodiment is as follows:

s301: and respectively acquiring sound signals generated when the hollow hammer strikes the target detection surface for the resonance cavities with different volumes obtained by adjusting the resonance cavity adjusting assembly.

Optionally, the adjustment strategy of the volume of the resonance cavity in this embodiment is as follows: and gradually increasing or decreasing the preset unit volume of the resonance cavity from the initial volume to obtain the resonance cavities with different volumes.

Illustratively, the predetermined unit volume is to be divided uniformly. For example, the lead screw is divided into a plurality of sections, for example 1024 sections, along the length direction, and the volume of the resonance cavity corresponding to the distance of each section of the lead screw is the preset unit volume. When the volume of the resonance chamber is adjusted, the movable plate 4 is driven by the resonance chamber adjusting assembly to move forward 1/1024 each time in the resonance chamber, namely, the volume of the resonance chamber is adjusted to preset unit volume.

The movable plate 4 moves forwards once from the initial position, namely, the hollow hammer is controlled to knock the target detection surface, and then the optimal volume of the resonance cavity is determined according to the sound signal generated when the hollow hammer knocks each time.

Optionally, in this embodiment, the movable plate is located at different positions of the resonance cavity, and the hollowing hammer may be controlled to tap for several times, for example, 10 times, and then the maximum resonance frequency in the sound signal generated by 10 taps may be selected.

After the movable plate is moved to the position of the hollow hammer, the movable plate cannot move continuously, all the maximum resonance frequencies are selected for comparison, and the volume of the resonance cavity corresponding to the maximum value in the maximum resonance frequencies is determined to be the optimal volume of the resonance cavity.

And when the empty drum detection is carried out, the determined volume of the detection resonance cavity is used as the volume of the resonance cavity during the detection, so that the empty drum probe is in the optimal working state.

Exemplarily, the initial volume of the resonance cavity is the volume of the movable plate at the end of the resonance cavity, and at this time, the volume of the resonance cavity is the maximum. When the resonance cavity adjusting assembly receives the resonance cavity adjusting command, the movable plate is driven to move forward for 1/1024 distance, namely, the volume of the resonance cavity is reduced by a preset unit volume.

Of course, the initial volume may also be set to be the minimum volume within the volume adjustable range, and the preset unit volume may be increased gradually.

Optionally, in this embodiment, the volume of the resonance cavity is adjusted within an adjustable range of the volume of the resonance cavity, where the adjustable range of the volume of the resonance cavity is a planar range in which a projection area of the resonance cavity is smaller than a detection surface of the target to be detected.

In this embodiment, in the process of adjusting the volume of the resonance cavity, the knocking action of the hollow hammer is controlled to obtain the sound signal every time the projection range of the resonance cavity on the target detection surface is adjusted to be smaller than the range of the target detection surface to be detected.

During specific adjustment, firstly, the plane range of a target detection surface to be detected is identified, and then, based on the plane range of the target detection surface to be detected, a resonance cavity adjusting command is output, so that the resonance cavity adjusting component adjusts the volume of the resonance cavity within the volume adjustable range of the resonance cavity, and the condition that the projection range of the resonance cavity on the target detection surface is adjusted to be smaller than the plane range of the target detection surface to be detected is met.

The method for identifying the plane range of the detection surface of the target to be detected can be realized by respectively measuring the length information of two edges of the detection surface of the target to be detected through arranging the length sensors, then outputting the length information to the main control unit, and determining the plane range through the main control unit.

Of course, other detection methods can be selected, and the planar range detection belongs to the technology well known in the art, and is not described herein again.

S302: and determining the volume of the detection resonance cavity matched with the target detection surface by comparing the resonance frequencies of the sound signals corresponding to different volumes of the resonance cavity.

Specifically, the target detection surface refers to a floor tile or a wall tile or the like. Since the resonance frequencies of the resonance chambers are different when the hollowing detection is performed on different target detection surfaces, the volumes of the resonance chambers matched with the resonance frequencies corresponding to the target detection surfaces need to be determined for the different target detection surfaces.

This embodiment is through adjusting resonance chamber volume to acquire the acoustic signal that different resonance chamber volumes correspond, then confirm assorted resonance chamber volume through the resonance frequency of comparison acoustic signal.

According to the embodiment, the resonance cavity adjusting component controls the hollow hammer to knock the target detection surface after adjusting the volume of the resonance cavity each time according to the resonance cavity adjusting command, and meanwhile, obtains the sound signal generated when the hollow hammer knocks the target detection surface.

Fig. 4 is a flowchart of a method for acquiring an audio signal according to an embodiment of the present application, and as shown in fig. 3, the step of acquiring an audio signal according to the present application includes:

s401, responding to the resonance cavity adjusting assembly to complete the adjustment of the volume of the current resonance cavity, and outputting an empty drum hammer control signal.

And the empty drum hammer control signal is used for controlling the empty drum hammer to knock the target detection surface according to the preset knocking times.

S402, acquiring a sound signal generated when the hollow hammer strikes a target detection surface each time.

And after the resonance cavity adjusting assembly finishes the current resonance cavity adjusting command, outputting an empty drum hammer control signal and controlling an empty drum hammer to knock a target detection surface according to the preset knocking times.

Illustratively, the preset number of times of the present embodiment may be 10 times, for example. Of course, the knocking times of the empty drum hammer can be specifically set according to actual needs.

When the empty drum hammer strikes the target detection surface each time, the sound collecting unit collects a sound signal generated when the empty drum hammer strikes the target detection surface once. The main control unit obtains a sound signal from the sound acquisition unit when the empty drum hammer strikes each time.

S403: judging whether the volume of the current resonance cavity is equal to a preset volume or not, if not, continuing to adjust the volume of the resonance cavity, and executing the step S401; if yes, go to step S302.

The volume of the resonance cavity matched with the target detection surface is determined by the following method:

and respectively recording the highest resonance frequency in all the acquired sound signals for resonance cavities with different volumes. Then, the maximum value among all the highest resonance frequencies is determined, and the resonance chamber volume corresponding to the maximum value is determined as the resonance chamber volume matched with the target detection surface.

In the embodiment, when the empty drum detector is used for carrying out empty drum detection, the volume of the resonance cavity in the empty drum probe is firstly adjusted, so that the volume of the resonance cavity meets the requirement of a detection environment, and the determined volume of the detection resonance cavity is used as the volume of the resonance cavity in the detection, so that the empty drum probe is in the best working state, and the purpose of accurate detection is realized.

In addition, because of the complexity of the hollowing detection environment, the sound signal of the hollowing hammer knocking the target detection surface is mixed with a lot of noise, therefore, the hollowing probe of the embodiment is also provided with a sound acquisition unit for acquiring the sound signal and carrying out amplification filtering so as to filter out the noise and obtain a clearer sound signal, more accurate judgment of hollowing is facilitated, and misjudgment is further avoided.

In an embodiment, optionally, in order to obtain a better sound collection effect, the present embodiment further adjusts the amplification factor of the amplification filtering circuit so as to be able to adapt to the corresponding detection environment.

In one embodiment, optionally, the step of adjusting the frequency amplification comprises:

sequentially outputting output voltage values corresponding to different amplification factors according to a preset voltage output mode, wherein the output voltage values are within a preset adjustable voltage range;

under different output voltage values, sound signals generated by knocking a target detection surface by a hollow hammer for preset times are respectively obtained, and the resonance frequency variance of the sound signals is calculated;

and determining the minimum value in all frequency variances, and determining the output voltage corresponding to the minimum value as the optimal output voltage.

The embodiment can greatly improve the accuracy of empty drum detection and reduce the false alarm rate by adjusting the amplification factor of the sound acquisition unit.

Optionally, the preset voltage output manner of this embodiment is: and sequentially adjusting unit voltages from initial voltages within the preset voltage adjustable range, wherein the unit voltages are obtained by uniformly dividing the preset voltage adjustable range.

Illustratively, the adjustable range of the output voltage of the present embodiment is 0-5V, the initial voltage of the output is set to 0V, and 5/1024V is increased each time. And stopping voltage output until the final output voltage is 5V.

When the voltage is output every time, the sound signal generated when the hollow hammer strikes the target detection surface is acquired, in the embodiment, 10 times of hollow hammer striking are set, and 10 times of sound signal are acquired.

And calculating resonance frequency variances of the acquired 10-time sound signals, then determining the minimum value in all the frequency variances, and determining the output voltage corresponding to the minimum value as the optimal output voltage.

The embodiment can greatly improve the accuracy of empty drum detection and reduce the false alarm rate by automatically adjusting the amplification factor of the sound acquisition unit to the sound signal. Compared with a mode of manually adjusting the amplification factor, the method of the embodiment greatly reduces the adjustment time and improves the adjustment efficiency.

Fig. 5 is a flowchart of a detection step provided in an embodiment of the present application, and as shown in fig. 5, the detection step specifically includes:

s501: and acquiring resonance frequency generated when the hollow drummer strikes the target detection surface when the resonance cavity is in a state of detecting the volume of the resonance cavity.

Specifically, the detected resonance chamber volume is determined based on steps S301 to S302.

In this embodiment, after the volume of the detection resonance cavity corresponding to the detection surface of the target to be detected is determined, the volume of the detection resonance cavity is stored in the corresponding storage unit, and when the detection surface of the target to be detected performs empty drum detection again, the volume of the detection resonance cavity is directly obtained from the storage unit.

In this embodiment, after the resonance cavity is adjusted to the volume of the detected resonance cavity, the projection plane range corresponding to the resonance cavity is smaller than the plane range of the detection plane of the target to be detected.

S502: and comparing the resonance frequency with a preset standard frequency corresponding to a target detection surface to be detected, and determining a hollowing detection result.

Specifically, this embodiment is adjusted and is obtained the detection resonance chamber volume after, based on this detection resonance chamber volume, with the opening of box structure towards the target detection face, then control the empty drum hammer and strike the target detection face, and the sound signal of beating produces the resonance frequency in the resonance chamber, compares corresponding resonance frequency with preset standard frequency at last, confirms the empty drum testing result.

In this embodiment, after the detection of one of the target detection surfaces is completed, the empty drum detection device may automatically move to the next target detection surface in the current detection scene, perform the empty drum detection on the next target detection surface again according to steps S501 to S402 until all the target detection surfaces are subjected to the empty drum detection, and finally determine the target detection surface on which the empty drum occurs in the current detection scene.

The target detection surface of the present embodiment refers to a target detection surface that is not included in the same detection area and has the same material and the same plane range in the same detection scene, for example, a plurality of floor tiles on the same indoor floor.

Optionally, in this embodiment, the storage unit corresponding to the main control unit stores preset standard frequencies corresponding to target detection surfaces of different materials, and when the empty drum detection result is specifically determined, the material of the target detection surface may be identified, and then the resonance frequency obtained by the acquisition is compared with the preset standard frequency of the corresponding material, so as to obtain the empty drum detection result.

This embodiment can set up the material and detect the sensor in the box, when carrying out the hollowing and detecting, can detect the material of target detection face through the material and detect the sensor discernment.

The empty drum detection result includes whether the target detection surface is empty drum, the degree of empty drum, the plane range of empty drum, and the like.

The manner of determining the result of the empty drum detection in this embodiment belongs to the well-known technology in the art, and is not described herein again.

To sum up, this application is according to the start adjustment instruction that user's a key triggered, the volume in automatically regulated resonance chamber to the resonance chamber of different volumes, acquire the sound signal that the empty drum hammer strikes target detection face respectively, and according to the resonance frequency of the sound signal that the resonance chamber of different volumes corresponds, confirm to detect the resonance chamber volume. This application can confirm to detect resonance chamber volume to the detection ring border of difference to empty drum detects, has improved the rate of accuracy that empty drum detected, avoids the emergence of erroneous judgement. Meanwhile, the working state of the hollowing probe is automatically adjusted by one key, so that the adjustment time is greatly shortened, and the working efficiency is improved.

In addition, this application is after adjusting to detect resonance chamber volume, has still further adjusted the magnification of sound signal, ensures the stability of the sound data of gathering, has further improved the accuracy that detects.

Fig. 6 is a block diagram of a structure of the empty drum detection system according to an embodiment of the present application, and as shown in fig. 6, the empty drum detection system includes:

the debugging module is used for responding to a starting adjustment instruction triggered by a user and executing a resonance cavity debugging step, and the resonance cavity debugging step comprises the following steps: outputting a resonance cavity adjusting command to enable the resonance cavity adjusting assembly to adjust the volume of the resonance cavity to a detection resonance cavity volume state matched with a target detection surface to be detected;

a detection module, configured to execute a detection step in response to the end of the resonance cavity debugging step, where the detection step includes: acquiring the volume information of the detection resonance cavity matched with the detection surface of the current target to be detected, and carrying out empty drum detection when the resonance cavity is in a state of detecting the volume of the resonance cavity.

The empty drum detection system provided by the above embodiment and the corresponding empty drum detection method embodiment belong to the same concept, and the specific implementation process thereof is detailed in the method embodiment and is not described herein again.

It should be noted that: the empty drum detection system provided in the above embodiment is only illustrated by dividing the above functional modules, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the control device is divided into different functional modules to complete all or part of the above described functions.

The present application further provides an empty drum detection device, and fig. 7 shows a schematic structural diagram of the empty drum detection device provided in an embodiment of the present application, and as shown in fig. 7, the empty drum detection device includes:

the sound acquisition unit is used for acquiring sound signals generated in the resonance cavity when the hollowing hammer strikes the target detection surface and amplifying the audio signals;

the main control unit is connected with the sound acquisition unit and used for executing the steps of the empty drum detection method embodiment;

and the resonance cavity adjusting assembly is connected with the control output end of the main control unit and is used for adjusting the volume of the resonance cavity according to a resonance cavity adjusting command sent by the main control unit.

Optionally, as shown in fig. 8, the sound collection unit of this embodiment includes a first amplification circuit, a filter circuit, and a second amplification circuit connected in series in this order, where the amplification factor of the second amplification circuit may be adjusted, so that the empty-drum probe obtains a more optimal operating state.

An embodiment of the present application further provides an electronic device, fig. 9 is a block diagram of a structure of the electronic device provided in an embodiment of the present application, and as shown in fig. 9, the electronic device includes a processor and a memory, where:

a processor, which may include one or more processing cores, such as: 4 core processors, 6 core processors, etc. The processor may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array).

The memory, which may include high speed random access memory, may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a memory device, or other volatile solid state storage device.

The memory of this embodiment stores a computer program, which is executable on the processor, and when the processor executes the computer program, all or part of the implementation steps of the method for detecting empty drum or the related embodiments of the apparatus for detecting empty drum of this application, and/or other contents described in the text, may be implemented.

Those skilled in the art will appreciate that fig. 9 is only one possible implementation manner of the electronic device in the embodiment of the present application, and in other embodiments, more or fewer components may be included, or some components may be combined, or different components may be included, and the present embodiment is not limited thereto.

The present application further provides a computer storage medium, in which a program is stored, and the program is executed by a processor to implement the steps of the above-mentioned embodiment of the empty drum detection method.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.